/* roulang page: index */
:root {
    --bg-primary: #050D16;
    --bg-secondary: #0A1828;
    --accent: #00D9C0;
    --accent-dark: #05222A;
    --accent-rgb: 0, 217, 192;
    --secondary-blue: #2A6FA8;
    --text-primary: #F0F7FF;
    --text-secondary: #9AB3C8;
    --text-muted: #5C7A92;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-strong: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-border-light: rgba(255, 255, 255, 0.06);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.28);
    --shadow-glow: 0 0 24px rgba(var(--accent-rgb), 0.20);
    --spacing-section: 88px;
    --spacing-section-mobile: 56px;
    --nav-width: 240px;
    --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  html { scroll-behavior: smooth; }

  body {
    font-family: var(--font-stack);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  a { color: var(--accent); text-decoration: none; transition: color 0.25s ease, opacity 0.25s ease; }
  a:hover { color: #5FF0DE; }
  img { max-width: 100%; height: auto; display: block; }
  button { font-family: inherit; cursor: pointer; }
  input, select, textarea { font-family: inherit; }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 2;
  }

  /* 左侧竖向导航 */
  .side-nav {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--nav-width);
    height: 100vh;
    background: rgba(10, 24, 40, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-right: 1px solid var(--glass-border-light);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow-y: auto;
  }

  .side-nav::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.05;
    pointer-events: none;
    background-image: radial-gradient(ellipse at 20% 30%, rgba(0, 217, 192, 0.4) 0%, transparent 40%),
                      radial-gradient(ellipse at 80% 70%, rgba(42, 111, 168, 0.5) 0%, transparent 45%);
  }

  .side-nav-brand {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--glass-border-light);
    position: relative;
    z-index: 1;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.25), rgba(var(--accent-rgb), 0.06));
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 18px;
    flex-shrink: 0;
  }

  .brand-text {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--text-primary);
    letter-spacing: 0.5px;
  }

  .brand-sub {
    display: block;
    font-size: 11px;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: 2px;
    margin-top: 2px;
  }

  .side-nav-menu {
    flex: 1;
    padding: 20px 12px;
    position: relative;
    z-index: 1;
    list-style: none;
  }

  .side-nav-menu li { margin-bottom: 4px; }

  .side-nav-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid transparent;
    transition: all 0.28s ease;
  }

  .side-nav-menu a i {
    font-size: 16px;
    width: 20px;
    text-align: center;
    opacity: 0.7;
  }

  .side-nav-menu a:hover {
    color: var(--text-primary);
    background: rgba(var(--accent-rgb), 0.06);
    border-left-color: rgba(var(--accent-rgb), 0.6);
  }

  .side-nav-menu a.active {
    color: var(--accent);
    background: rgba(var(--accent-rgb), 0.06);
    border-left-color: var(--accent);
    font-weight: 600;
    box-shadow: inset 0 0 20px rgba(var(--accent-rgb), 0.03);
  }

  .side-nav-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--glass-border-light);
    position: relative;
    z-index: 1;
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  .side-nav-footer i { margin-right: 6px; color: var(--secondary-blue); }

  /* 移动端顶部导航 */
  .mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: rgba(10, 24, 40, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--glass-border-light);
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    z-index: 1100;
  }

  .mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
  }

  .mobile-logo i {
    color: var(--accent);
    font-size: 18px;
  }

  .mobile-menu-btn {
    width: 42px;
    height: 42px;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: border-color 0.25s;
  }

  .mobile-menu-btn span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
  }

  .mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
  .mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .mobile-drawer {
    display: none;
    position: fixed;
    top: 56px;
    right: 0;
    width: 280px;
    max-width: 85vw;
    height: calc(100vh - 56px);
    background: rgba(8, 20, 34, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--glass-border);
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.5);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 1099;
    padding: 24px 16px;
    overflow-y: auto;
  }

  .mobile-drawer.open { transform: translateX(0); }

  .mobile-drawer ul { list-style: none; }

  .mobile-drawer li { margin-bottom: 6px; }

  .mobile-drawer a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-secondary);
    transition: all 0.25s;
  }

  .mobile-drawer a i { width: 20px; text-align: center; font-size: 16px; }

  .mobile-drawer a:hover, .mobile-drawer a.active {
    background: rgba(var(--accent-rgb), 0.08);
    color: var(--accent);
  }

  .mobile-drawer-cta {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border-light);
  }

  .mobile-drawer-cta p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  /* 主内容区 */
  .main-content {
    margin-left: var(--nav-width);
    min-height: 100vh;
    position: relative;
  }

  /* Hero */
  .hero {
    position: relative;
    min-height: 72vh;
    display: flex;
    align-items: center;
    background: linear-gradient(to bottom, rgba(5, 13, 22, 0.35), rgba(5, 13, 22, 0.78)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    border-bottom: 1px solid var(--glass-border-light);
    overflow: hidden;
  }

  .hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to bottom, transparent, var(--bg-primary));
    pointer-events: none;
  }

  .hero-water {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    pointer-events: none;
    opacity: 0.05;
    background-image: repeating-linear-gradient(0deg, transparent 0px, transparent 30px, rgba(0, 217, 192, 0.5) 31px, transparent 32px),
                      repeating-linear-gradient(90deg, transparent 0px, transparent 55px, rgba(0, 217, 192, 0.4) 56px, transparent 57px);
  }

  .hero-content {
    padding: 100px 0 120px;
    position: relative;
    z-index: 3;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.25);
    border-radius: 100px;
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 24px;
    letter-spacing: 1px;
  }

  .hero-badge i { font-size: 12px; }

  .hero h1 {
    font-size: 46px;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 1px;
    color: var(--text-primary);
    margin-bottom: 20px;
    max-width: 680px;
  }

  .hero h1 span {
    color: var(--accent);
  }

  .hero-desc {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 560px;
    margin-bottom: 36px;
  }

  .hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 30px;
    background: var(--accent);
    color: var(--accent-dark);
    font-size: 15px;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-glow);
    transition: all 0.28s ease;
    cursor: pointer;
  }

  .btn-primary:hover {
    background: #33E5CF;
    color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 0 32px rgba(var(--accent-rgb), 0.4);
  }

  .btn-primary:active {
    transform: scale(0.97);
    box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.2);
  }

  .btn-primary:focus-visible,
  .btn-secondary:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.28s ease;
    cursor: pointer;
  }

  .btn-secondary:hover {
    border-color: rgba(var(--accent-rgb), 0.45);
    color: var(--accent);
    background: rgba(var(--accent-rgb), 0.08);
    transform: translateY(-2px);
  }

  .btn-secondary:active {
    transform: scale(0.97);
  }

  .hero-meta {
    margin-top: 42px;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 13px;
    color: var(--text-muted);
  }

  .hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
  .hero-meta i { color: var(--accent); opacity: 0.7; }

  /* 通用板块 */
  .section {
    padding: var(--spacing-section) 0;
    position: relative;
  }

  .section-dividers {
    position: relative;
  }

  .section-dividers::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 560px;
    max-width: 80%;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(var(--accent-rgb), 0.25), transparent);
  }

  .section-head {
    margin-bottom: 48px;
  }

  .section-head .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
  }

  .section-head .section-tag::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
  }

  .section-head h2 {
    font-size: 30px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 14px;
  }

  .section-head p {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 620px;
    line-height: 1.7;
  }

  /* 品牌故事 */
  .brand-story {
    background: transparent;
  }

  .brand-story-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
  }

  .brand-story-text .brand-story-label {
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 3px;
    margin-bottom: 16px;
    font-weight: 600;
  }

  .brand-story-text h2 {
    font-size: 30px;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 20px;
    color: var(--text-primary);
  }

  .brand-story-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
  }

  .brand-story-text p b { color: var(--text-primary); font-weight: 600; }

  .brand-story-img {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--glass-border);
  }

  .brand-story-img img {
    width: 100%;
    height: auto;
    min-height: 320px;
    object-fit: cover;
    border-radius: var(--radius-lg);
  }

  .brand-story-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(5, 13, 22, 0.15), transparent 60%);
    border-radius: var(--radius-lg);
  }

  .brand-story-features {
    margin-top: 40px;
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
  }

  .brand-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
  }

  .brand-feature-item i {
    font-size: 18px;
    color: var(--accent);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    background: rgba(var(--accent-rgb), 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
  }

  .brand-feature-item:hover i {
    background: rgba(var(--accent-rgb), 0.12);
    box-shadow: var(--shadow-glow);
  }

  /* 精选内容卡 */
  .featured-section {
    background: linear-gradient(180deg, rgba(10, 24, 40, 0.4), rgba(5, 13, 22, 0.2));
    border-top: 1px solid var(--glass-border-light);
    border-bottom: 1px solid var(--glass-border-light);
  }

  .featured-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 24px;
    margin-bottom: 24px;
  }

  .featured-grid-2 {
    grid-template-columns: 5fr 7fr;
  }

  .featured-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: var(--shadow-card);
    transition: all 0.35s ease;
    display: flex;
    flex-direction: column;
  }

  .featured-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), var(--shadow-glow);
  }

  .featured-card-img {
    position: relative;
    height: 200px;
    overflow: hidden;
  }

  .featured-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
  }

  .featured-card:hover .featured-card-img img {
    transform: scale(1.04);
  }

  .featured-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 45%, rgba(5, 13, 22, 0.85));
  }

  .featured-card-cat {
    position: absolute;
    left: 16px;
    bottom: 14px;
    padding: 4px 12px;
    background: rgba(var(--accent-rgb), 0.16);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 100px;
    font-size: 12px;
    color: var(--accent);
    z-index: 2;
  }

  .featured-card-body {
    padding: 22px 22px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .featured-card-body h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
  }

  .featured-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 16px;
  }

  .featured-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    transition: gap 0.25s ease;
  }

  .featured-card-link:hover {
    gap: 10px;
    color: #5FF0DE;
  }

  /* 统计数字 */
  .stats-section {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--glass-border-light);
    border-bottom: 1px solid var(--glass-border-light);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
  }

  .stat-item {
    padding: 36px 20px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border-light);
    transition: border-color 0.3s ease;
  }

  .stat-item:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
  }

  .stat-number {
    font-size: 52px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
    margin-bottom: 8px;
    letter-spacing: 1px;
  }

  .stat-number sup {
    font-size: 20px;
    font-weight: 700;
    vertical-align: super;
  }

  .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 1px;
  }

  /* 平台特色 */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .feature-card {
    display: flex;
    gap: 18px;
    padding: 26px 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.3s ease;
  }

  .feature-card:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
  }

  .feature-card-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    background: rgba(var(--accent-rgb), 0.08);
    border: 1px solid rgba(var(--accent-rgb), 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--accent);
    flex-shrink: 0;
  }

  .feature-card-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
  }

  .feature-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* 最新信息 CMS */
  .news-section {
    background: transparent;
  }

  .news-list {
    max-width: 860px;
    margin: 0 auto;
  }

  .news-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 22px 24px;
    border-bottom: 1px solid var(--glass-border-light);
    transition: all 0.3s ease;
    border-radius: var(--radius-md);
  }

  .news-item:hover {
    background: rgba(var(--accent-rgb), 0.03);
  }

  .news-item-marker {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.5);
  }

  .news-item-content {
    flex: 1;
    min-width: 0;
  }

  .news-item-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: block;
    line-height: 1.4;
    transition: color 0.25s;
  }

  .news-item-title:hover { color: var(--accent); }

  .news-item-summary {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .news-item-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    flex-shrink: 0;
  }

  .news-badge {
    padding: 3px 12px;
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--accent);
    font-size: 12px;
    border-radius: 100px;
    white-space: nowrap;
  }

  .news-date {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
  }

  .empty-state {
    text-align: center;
    padding: 64px 20px;
    color: var(--text-muted);
    border: 1px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.02);
  }

  .empty-state i {
    font-size: 40px;
    margin-bottom: 16px;
    color: var(--text-muted);
    opacity: 0.4;
  }

  .empty-state p {
    font-size: 14px;
    color: var(--text-muted);
  }

  .news-foot {
    text-align: center;
    margin-top: 32px;
  }

  .news-foot a {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 24px;
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
  }

  .news-foot a:hover {
    color: var(--accent);
    border-color: rgba(var(--accent-rgb), 0.4);
  }

  /* FAQ */
  .faq-section {
    background: linear-gradient(180deg, rgba(10, 24, 40, 0.35), rgba(5, 13, 22, 0.2));
    border-top: 1px solid var(--glass-border-light);
    border-bottom: 1px solid var(--glass-border-light);
  }

  .faq-container {
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-container .accordion {
    background: transparent;
  }

  .faq-container .accordion-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease;
  }

  .faq-container .accordion-item:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
  }

  .faq-container .accordion-item.is-active {
    border-color: rgba(var(--accent-rgb), 0.4);
  }

  .faq-container .accordion-title {
    padding: 18px 22px;
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    border: none;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color 0.25s;
  }

  .faq-container .accordion-title::after {
    content: '+';
    font-size: 22px;
    font-weight: 400;
    color: var(--accent);
    transition: transform 0.3s ease;
    margin-left: 16px;
  }

  .faq-container .accordion-item.is-active .accordion-title::after {
    transform: rotate(45deg);
  }

  .faq-container .accordion-title:hover {
    color: var(--accent);
  }

  .faq-container .accordion-content {
    padding: 0 22px 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.75;
  }

  /* CTA 订阅 */
  .cta-section {
    position: relative;
    background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-radius: 0;
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(5, 13, 22, 0.92), rgba(10, 24, 40, 0.82));
  }

  .cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
  }

  .cta-inner h2 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-primary);
  }

  .cta-inner p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.7;
  }

  .cta-form {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
  }

  .cta-form input[type="email"] {
    flex: 1;
    padding: 14px 18px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
  }

  .cta-form input[type="email"]::placeholder {
    color: var(--text-muted);
  }

  .cta-form input[type="email"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
  }

  .cta-form .btn-primary {
    padding: 14px 26px;
    white-space: nowrap;
  }

  .cta-privacy {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
  }

  .cta-privacy i { margin-right: 4px; }

  /* 页脚 */
  .site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border-light);
    padding: 56px 0 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.4fr;
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-brand p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-top: 14px;
    max-width: 280px;
  }

  .footer-brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .footer-brand-logo .brand-icon {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }

  .footer-brand-logo .brand-text {
    font-size: 14px;
  }

  .footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: 1px;
  }

  .footer-col ul {
    list-style: none;
  }

  .footer-col li { margin-bottom: 10px; }

  .footer-col a {
    font-size: 13px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.25s, padding-left 0.25s;
  }

  .footer-col a i {
    font-size: 11px;
    color: var(--text-muted);
  }

  .footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
  }

  .footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
  }

  .footer-contact i {
    color: var(--accent);
    font-size: 14px;
    margin-top: 3px;
    width: 16px;
    text-align: center;
  }

  .footer-bottom {
    border-top: 1px solid var(--glass-border-light);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
  }

  .footer-bottom a { color: var(--text-muted); }
  .footer-bottom a:hover { color: var(--accent); }

  .footer-bottom-links {
    display: flex;
    gap: 20px;
  }

  /* 响应式 */
  @media (max-width: 63.99em) {
    .side-nav { display: none; }
    .mobile-topbar { display: flex; }
    .mobile-drawer { display: block; }
    .main-content { margin-left: 0; }

    .hero { min-height: calc(100vh - 56px); padding-top: 26px; }
    .hero-content { padding: 72px 0 96px; }
    .hero h1 { font-size: 34px; }

    .brand-story-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .brand-story-img { order: -1; }

    .features-grid {
      grid-template-columns: 1fr;
    }

    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .stat-number {
      font-size: 40px;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }

    .footer-brand { grid-column: 1 / -1; }
  }

  @media (max-width: 39.99em) {
    .container { padding: 0 16px; }

    .section { padding: 48px 0; }

    .hero { min-height: 560px; }
    .hero h1 { font-size: 28px; line-height: 1.35; }
    .hero-desc { font-size: 15px; }

    .btn-primary, .btn-secondary {
      padding: 12px 22px;
      font-size: 14px;
    }

    .featured-grid,
    .featured-grid-2 {
      grid-template-columns: 1fr;
    }

    .stats-grid {
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .stat-item { padding: 24px 12px; }
    .stat-number { font-size: 32px; }

    .section-head h2 { font-size: 24px; }

    .news-item {
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
      padding: 18px 16px;
    }

    .news-item-meta {
      flex-direction: row;
      align-items: center;
      width: 100%;
    }

    .cta-form {
      flex-direction: column;
    }

    .cta-form .btn-primary {
      width: 100%;
      justify-content: center;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }

    .brand-story-text h2 { font-size: 24px; }

    .featured-card-img { height: 180px; }

    .hero-badge { font-size: 12px; padding: 5px 12px; }
  }

  /* 波浪分割装饰 */
  .wave-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 40px;
    z-index: 2;
    pointer-events: none;
    opacity: 0.12;
  }

  .wave-divider svg {
    width: 100%;
    height: 100%;
  }

  /* 滚动条 */
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }

  ::-webkit-scrollbar-track {
    background: var(--bg-primary);
  }

  ::-webkit-scrollbar-thumb {
    background: rgba(var(--accent-rgb), 0.25);
    border-radius: 10px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--accent-rgb), 0.4);
  }

  ::selection {
    background: rgba(var(--accent-rgb), 0.25);
    color: var(--text-primary);
  }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --bg-deep: #050D16;
            --bg-panel: #0A1828;
            --brand: #00D9C0;
            --brand-dark: #05222A;
            --accent: #2A6FA8;
            --text-main: #F0F7FF;
            --text-sub: #9AB3C8;
            --text-muted: #5C7A92;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-bg-strong: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 24px rgba(0, 217, 192, 0.20);
            --shadow-glow-strong: 0 0 36px rgba(0, 217, 192, 0.35);
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --header-width: 240px;
            --transition: all .3s cubic-bezier(.25, .8, .25, 1);
        }

        /* ===== reset / base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body.foundation-mq {
            min-height: 100vh;
        }
        a {
            color: var(--text-main);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--brand);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }
        ::selection {
            background: rgba(0, 217, 192, 0.3);
            color: #fff;
        }

        /* ===== 左侧竖向导航（桌面端 ≥64em） ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--header-width);
            height: 100vh;
            background: rgba(10, 24, 40, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-right: 1px solid var(--glass-border-light);
            z-index: 100;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }
        .brand-area {
            padding: 36px 24px 28px;
            border-bottom: 1px solid var(--glass-border-light);
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .brand-icon i {
            color: var(--brand);
            font-size: 18px;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.02em;
            line-height: 1.35;
        }
        .brand-text span {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-sub);
            letter-spacing: 0.08em;
            margin-top: 2px;
        }
        .main-nav {
            flex: 1;
            padding: 24px 0;
        }
        .main-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-left: 3px solid transparent;
            transition: var(--transition);
            position: relative;
        }
        .main-nav a i {
            width: 20px;
            text-align: center;
            font-size: 15px;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--text-main);
            background: rgba(0, 217, 192, 0.06);
        }
        .main-nav a.active {
            color: var(--text-main);
            background: rgba(0, 217, 192, 0.06);
            border-left-color: var(--brand);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 12px rgba(0, 217, 192, 0.8);
        }
        .side-footer {
            padding: 24px 28px;
            border-top: 1px solid var(--glass-border-light);
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .side-footer p {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 0 6px;
        }
        .side-footer i {
            color: var(--brand);
            font-size: 13px;
        }

        /* ===== 移动端顶部导航 <64em ===== */
        .mobile-header {
            display: none;
        }
        .mobile-menu {
            display: none;
        }

        /* ===== 内容区 ===== */
        .content-area {
            margin-left: var(--header-width);
            min-height: 100vh;
            background:
                radial-gradient(ellipse at 70% 10%, rgba(0, 217, 192, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 20% 80%, rgba(42, 111, 168, 0.08) 0%, transparent 50%),
                var(--bg-deep);
            position: relative;
        }
        .content-area::before {
            content: '';
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            opacity: 0.03;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 400'%3E%3Cpath d='M0 200 Q 100 120 250 200 T 500 200 T 750 200 T 1000 200 T 1200 200' stroke='%2300D9C0' fill='none' stroke-width='1'/%3E%3C/svg%3E");
            background-size: 1200px auto;
            background-repeat: repeat;
            z-index: 0;
        }

        /* ===== 内页 Hero ===== */
        .page-hero {
            position: relative;
            padding: 72px 0 60px;
            background: linear-gradient(135deg, rgba(5, 13, 22, 0.92) 0%, rgba(5, 13, 22, 0.75) 50%, rgba(0, 217, 192, 0.12) 100%);
            overflow: hidden;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }
        .page-hero .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 13, 22, 0.70) 0%, rgba(5, 13, 22, 0.3) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-sub);
        }
        .breadcrumb a:hover {
            color: var(--brand);
        }
        .breadcrumb .current {
            color: var(--text-main);
        }
        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .page-hero h1 i {
            color: var(--brand);
            font-style: normal;
        }
        .page-hero .hero-sub {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .page-hero .hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .page-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.2);
            color: var(--brand);
            font-size: 13px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background: rgba(10, 24, 40, 0.5);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand);
            margin-bottom: 14px;
            font-weight: 600;
        }
        .section-tag::before {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
        }
        .section-title {
            font-size: 31px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }
        .section-desc {
            color: var(--text-sub);
            font-size: 16px;
            line-height: 1.8;
            max-width: 720px;
        }
        .wave-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 217, 192, 0.25), transparent);
            border: none;
            margin: 0;
        }

        /* ===== 图文交错块 ===== */
        .split-grid {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }
        .split-text {
            flex: 1 1 420px;
            min-width: 0;
        }
        .split-media {
            flex: 1 1 420px;
            min-width: 0;
            position: relative;
        }
        .split-media img {
            width: 100%;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .split-media::after {
            content: '';
            position: absolute;
            inset: 16px -16px -16px 16px;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 217, 192, 0.18);
            z-index: -1;
        }
        .split-text p {
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 16px;
        }
        .feature-points {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 14px;
            margin-top: 24px;
        }
        .feature-point {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border-light);
            border-radius: var(--radius-md);
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
        }
        .feature-point:hover {
            border-color: rgba(0, 217, 192, 0.3);
            background: rgba(0, 217, 192, 0.08);
        }
        .feature-point i {
            color: var(--brand);
            font-size: 15px;
        }

        /* ===== 错落卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .feature-card {
            grid-column: span 6;
            padding: 36px 32px;
            border-radius: var(--radius-lg);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--brand);
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: rgba(0, 217, 192, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card.wide {
            grid-column: span 7;
        }
        .feature-card.slim {
            grid-column: span 5;
        }
        .feature-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .feature-card .card-icon i {
            font-size: 20px;
            color: var(--brand);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .feature-card p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.75;
        }

        /* ===== 流程步骤 ===== */
        .steps-section {
            background: rgba(10, 24, 40, 0.5);
            border-top: 1px solid var(--glass-border-light);
            border-bottom: 1px solid var(--glass-border-light);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 40px;
            position: relative;
            counter-reset: step;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 8%;
            right: 8%;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 192, 0.1), rgba(0, 217, 192, 0.4), rgba(0, 217, 192, 0.1));
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 8px;
        }
        .step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            margin: 0 auto 20px;
            background: var(--bg-panel);
            border: 2px solid rgba(0, 217, 192, 0.5);
            box-shadow: 0 0 20px rgba(0, 217, 192, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--brand);
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ===== 信任数据 ===== */
        .trust-stats {
            padding: 64px 0;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--glass-border-light);
            border-bottom: 1px solid var(--glass-border-light);
        }
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .stat-num {
            font-size: 56px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.1;
            display: block;
            font-style: normal;
        }
        .stat-item .stat-label {
            display: block;
            margin-top: 10px;
            font-size: 14px;
            color: var(--text-sub);
        }
        .stat-item .stat-note {
            display: block;
            margin-top: 4px;
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-list {
            max-width: 860px;
            margin: 40px auto 0;
        }
        .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-item:hover {
            border-color: rgba(0, 217, 192, 0.3) !important;
        }
        .accordion-title {
            color: var(--text-main) !important;
            font-size: 16px !important;
            font-weight: 600;
            padding: 20px 28px !important;
            border-bottom: none !important;
            background: transparent;
            position: relative;
            line-height: 1.5;
        }
        .accordion-title::before {
            content: '+';
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            font-weight: 400;
            color: var(--brand);
            transition: var(--transition);
        }
        .accordion-item.is-active > .accordion-title::before {
            content: '−';
            transform: translateY(-50%) rotate(180deg);
        }
        .accordion-title:hover,
        .accordion-title:focus {
            color: var(--brand) !important;
            background: rgba(0, 217, 192, 0.04) !important;
        }
        .accordion-content {
            background: transparent;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.85;
            border-top: 1px solid var(--glass-border-light);
            margin: 0 28px;
            padding: 18px 0 22px;
        }
        .accordion-content p {
            margin-bottom: 0;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            padding: 72px 0 80px;
            position: relative;
            background: linear-gradient(145deg, rgba(0, 217, 192, 0.06) 0%, rgba(5, 13, 22, 0.2) 50%, rgba(5, 13, 22, 0.6) 100%);
            border-top: 1px solid var(--glass-border-light);
        }
        .cta-inner {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 56px 48px;
            border-radius: var(--radius-xl);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.1);
            filter: blur(40px);
        }
        .cta-inner h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .cta-inner p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-primary {
            background: var(--brand);
            color: var(--brand-dark);
            box-shadow: 0 0 24px rgba(0, 217, 192, 0.25);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            color: var(--brand-dark);
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
            backdrop-filter: blur(8px);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            border-color: rgba(0, 217, 192, 0.4);
            color: var(--brand);
            background: rgba(0, 217, 192, 0.06);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A1828;
            border-top: 1px solid var(--glass-border-light);
            padding: 56px 0 0;
            margin-left: var(--header-width);
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand-logo .brand-icon {
            width: 38px;
            height: 38px;
        }
        .footer-brand-logo .brand-text {
            font-size: 16px;
        }
        .footer-brand p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
        }
        .footer-col ul {
            display: grid;
            gap: 8px;
        }
        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.6;
        }
        .footer-col ul li a i {
            font-size: 11px;
            color: var(--brand);
        }
        .footer-col ul li a:hover {
            color: var(--brand);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 10px;
        }
        .footer-contact i {
            color: var(--brand);
            font-size: 14px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid var(--glass-border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .footer-bottom-links a {
            color: var(--text-sub);
        }
        .footer-bottom-links a:hover {
            color: var(--brand);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 63.999em) {
            .site-header {
                display: none;
            }
            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 56px;
                background: rgba(10, 24, 40, 0.92);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                border-bottom: 1px solid var(--glass-border-light);
                padding: 0 20px;
                z-index: 200;
            }
            .mobile-header .brand-logo {
                color: var(--text-main);
                font-size: 17px;
                font-weight: 700;
            }
            .menu-toggle {
                background: transparent;
                color: var(--text-main);
                font-size: 20px;
                padding: 8px 10px;
                border-radius: var(--radius-sm);
                cursor: pointer;
            }
            .menu-toggle:hover {
                color: var(--brand);
            }
            .mobile-menu {
                display: block;
                position: fixed;
                top: 56px;
                right: 0;
                width: 300px;
                max-width: 85vw;
                height: calc(100vh - 56px);
                background: rgba(10, 24, 40, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-left: 1px solid var(--glass-border);
                padding: 20px 0;
                transform: translateX(100%);
                transition: transform .32s ease;
                z-index: 199;
                overflow-y: auto;
            }
            .mobile-menu.open {
                transform: translateX(0);
            }
            .mobile-menu a {
                display: flex;
                align-items: center;
                gap: 14px;
                padding: 14px 24px;
                font-size: 15px;
                font-weight: 500;
                color: var(--text-sub);
                border-left: 3px solid transparent;
            }
            .mobile-menu a i {
                width: 18px;
                text-align: center;
            }
            .mobile-menu a.active {
                color: var(--text-main);
                background: rgba(0, 217, 192, 0.08);
                border-left-color: var(--brand);
            }
            .mobile-menu a:hover {
                color: var(--text-main);
                background: rgba(0, 217, 192, 0.05);
            }
            .content-area {
                margin-left: 0;
                padding-top: 56px;
            }
            .site-footer {
                margin-left: 0;
            }
            .container {
                padding: 0 20px;
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .features-grid {
                grid-template-columns: repeat(12, 1fr);
            }
            .feature-card.wide,
            .feature-card.slim,
            .feature-card {
                grid-column: span 12;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid::before {
                display: none;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-item .stat-num {
                font-size: 46px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 39.999em) {
            .container {
                padding: 0 16px;
            }
            .page-hero {
                padding: 48px 0 44px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-sub {
                font-size: 15px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .split-grid {
                gap: 36px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .stat-item .stat-num {
                font-size: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-inner {
                padding: 36px 24px;
            }
            .cta-inner h2 {
                font-size: 23px;
            }
            .btns-group {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Focus 可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
  --bg-deep: #050D16;
  --bg-panel: #0A1828;
  --primary: #00D9C0;
  --secondary: #2A6FA8;
  --text-main: #F0F7FF;
  --text-sub: #9AB3C8;
  --text-muted: #5C7A92;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.12);
  --glass-bg-hover: rgba(255,255,255,0.08);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0,0,0,0.28);
  --glow: 0 0 24px rgba(0,217,192,0.2);
  --glow-hover: 0 0 36px rgba(0,217,192,0.4);
  --sidebar-width: 240px;
  --header-height: 56px;
  --transition: all 0.25s ease;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.foundation-body {
  background: var(--bg-deep);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease;
}

img {
  max-width: 100%;
  height: auto;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.grid-container.container {
  max-width: 1280px;
  padding: 0 32px;
}

/* ========== 左侧导航 ========== */
.side-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, rgba(10,24,40,0.92), rgba(5,13,22,0.97));
  border-right: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 999;
  display: flex;
  flex-direction: column;
}

.side-nav-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 26px 18px 20px;
}

.side-brand {
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,217,192,0.12);
  border: 1px solid rgba(0,217,192,0.3);
  border-radius: 12px;
  color: var(--primary);
  font-size: 18px;
  box-shadow: 0 0 18px rgba(0,217,192,0.12);
  flex-shrink: 0;
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.side-menu.menu {
  margin-top: 22px;
  flex-direction: column;
  align-items: stretch;
  flex: 1;
  background: transparent;
  padding: 0;
}

.side-menu.menu li {
  flex: none;
  width: 100%;
  margin: 2px 0;
}

.side-menu.menu a.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1;
  background: transparent;
  transition: var(--transition);
  border-left: 3px solid transparent;
  text-align: left;
}

.side-menu.menu a.nav-item i {
  font-size: 14px;
  width: 18px;
  text-align: center;
  color: var(--text-muted);
  transition: color 0.25s ease;
}

.side-menu.menu a.nav-item:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.05);
}

.side-menu.menu a.nav-item.active {
  color: var(--text-main);
  background: rgba(0,217,192,0.06);
  border-left-color: var(--primary);
}

.side-menu.menu a.nav-item.active i {
  color: var(--primary);
}

.side-menu.menu a.nav-item:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.side-footer {
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

.side-footer p {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 4px;
  word-break: break-all;
}

.side-footer i {
  color: var(--primary);
  opacity: 0.7;
  width: 14px;
}

/* ========== 移动端导航 ========== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(10,24,40,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  font-weight: 600;
  font-size: 16px;
}

.mobile-brand .brand-icon {
  width: 30px;
  height: 30px;
  font-size: 14px;
  border-radius: 8px;
}

.mobile-menu-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-menu-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  right: 0;
  width: 280px;
  height: calc(100vh - var(--header-height));
  background: rgba(8,18,30,0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 24px 20px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 800;
  overflow-y: auto;
  border-left: 1px solid rgba(255,255,255,0.08);
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-menu.menu {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  background: transparent;
  padding: 0;
  margin: 0;
}

.mobile-menu.menu li {
  width: 100%;
  margin: 2px 0;
}

.mobile-menu.menu a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text-sub);
  font-size: 15px;
  border-left: 3px solid transparent;
  transition: var(--transition);
}

.mobile-menu.menu a:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.05);
}

.mobile-menu.menu a.active {
  color: var(--text-main);
  background: rgba(0,217,192,0.06);
  border-left-color: var(--primary);
}

@media (min-width: 64em) {
  .mobile-drawer {
    display: none !important;
  }
}

/* ========== 主区域 ========== */
.main-area {
  margin-left: var(--sidebar-width);
  min-height: calc(100vh - 300px);
  background:
    radial-gradient(ellipse 60% 40% at 70% 8%, rgba(0,217,192,0.055), transparent 60%),
    radial-gradient(ellipse 40% 30% at 20% 32%, rgba(42,111,168,0.05), transparent 60%),
    var(--bg-deep);
}

/* ========== 文章 Banner ========== */
.article-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 72px 0 56px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}

.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,13,22,0.55) 0%, rgba(5,13,22,0.88) 100%);
}

.article-banner::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 24px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 24'%3E%3Cpath d='M0 12 Q15 0 30 12 T60 12 T90 12 T120 12' fill='none' stroke='%2300D9C0' stroke-width='1.5'/%3E%3C/svg%3E") repeat-x bottom;
  background-size: 240px 24px;
  opacity: 0.18;
  pointer-events: none;
}

.article-banner .article-header {
  position: relative;
  z-index: 1;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.breadcrumb a {
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--text-main);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 文章头部 ========== */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 20px;
}

.badge {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 999px;
  background: rgba(0,217,192,0.14);
  border: 1px solid rgba(0,217,192,0.2);
  color: var(--primary);
  font-size: 13px;
  line-height: 1.4;
}

.meta-item {
  font-size: 14px;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item i {
  color: var(--text-muted);
}

.article-banner h1 {
  font-size: 42px;
  line-height: 1.28;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  max-width: 900px;
  margin: 0;
}

/* ========== 正文 ========== */
.article-main {
  padding: 56px 0 24px;
  max-width: 860px;
}

.article-body {
  max-width: 820px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
}

.article-body h2 {
  font-size: 26px;
  color: var(--text-main);
  margin: 44px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 21px;
  color: var(--text-main);
  margin: 32px 0 12px;
  line-height: 1.4;
}

.article-body h4 {
  font-size: 18px;
  color: var(--text-main);
  margin: 24px 0 10px;
}

.article-body p {
  margin: 0 0 1.5em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5em;
  padding-left: 1.4em;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body img {
  border-radius: 12px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(0,217,192,0.3);
}

.article-body a:hover {
  border-bottom-color: var(--primary);
}

.article-body blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  background: rgba(0,217,192,0.05);
  border-left: 3px solid var(--primary);
  border-radius: 0 12px 12px 0;
  color: var(--text-sub);
  font-style: normal;
}

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 24px 0;
  background: rgba(10,24,40,0.6);
  border-radius: 12px;
  overflow: hidden;
  font-size: 15px;
  border: 1px solid rgba(255,255,255,0.06);
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  text-align: left;
}

.article-body th {
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
  font-weight: 600;
}

.article-body tr:last-child td {
  border-bottom: none;
}

.article-body code {
  background: rgba(255,255,255,0.08);
  border-radius: 5px;
  padding: 2px 8px;
  font-size: 14px;
  color: #BDE7EA;
}

.article-body pre {
  background: var(--bg-panel);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 24px 0;
}

.article-body pre code {
  background: transparent;
  padding: 0;
}

/* ========== 标签 ========== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 40px 0 8px;
}

.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(0,217,192,0.12);
  border: 1px solid rgba(0,217,192,0.18);
  color: var(--primary);
  font-size: 13px;
  line-height: 1.4;
}

/* ========== 返回链接 ========== */
.back-link {
  margin: 32px 0 8px;
}

.back-link a {
  color: var(--text-sub);
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.back-link a:hover {
  color: var(--primary);
  transform: translateX(-4px);
}

.back-link a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ========== 相关推荐 ========== */
.related-section {
  margin-top: 72px;
  padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.related-section h2 {
  font-size: 26px;
  color: var(--text-main);
  margin-bottom: 28px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: block;
  position: relative;
}

.related-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--glow);
  background: var(--glass-bg-hover);
}

.related-card:active {
  transform: scale(0.98);
}

.related-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.related-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  display: block;
}

.related-card-body {
  padding: 18px 20px 22px;
}

.related-card-body h3 {
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--text-main);
  font-weight: 600;
}

.related-card-body p {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
  line-height: 1.6;
}

/* ========== 空状态 ========== */
.article-empty {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.article-empty i {
  font-size: 48px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.article-empty h2 {
  font-size: 24px;
  color: var(--text-main);
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-sub);
  margin-bottom: 28px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #05222A;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: 10px;
  box-shadow: var(--glow);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn:hover {
  box-shadow: var(--glow-hover);
  transform: translateY(-2px);
  color: #05222A;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  color: #05222A;
}

/* ========== CTA ========== */
.article-cta {
  margin: 64px 0 80px;
  padding: 44px 32px;
  text-align: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.article-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.article-cta h3 {
  font-size: 22px;
  margin-bottom: 10px;
  color: var(--text-main);
}

.article-cta p {
  color: var(--text-sub);
  margin-bottom: 24px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== 页脚 ========== */
.site-footer {
  margin-left: var(--sidebar-width);
  background: #0A1828;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 56px 0 24px;
  color: var(--text-sub);
}

.site-footer .container {
  max-width: 1280px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand-logo .brand-icon {
  width: 34px;
  height: 34px;
  font-size: 15px;
  border-radius: 10px;
}

.footer-brand-logo .brand-text {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-main);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 340px;
  margin: 0;
}

.footer-col h4 {
  font-size: 16px;
  color: var(--text-main);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul {
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-col a {
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-col a i {
  font-size: 12px;
  color: var(--text-muted);
  transition: color 0.25s;
}

.footer-col a:hover i {
  color: var(--primary);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 10px;
  word-break: break-all;
}

.footer-contact i {
  color: var(--primary);
  opacity: 0.8;
  width: 16px;
  text-align: center;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  transition: color 0.25s;
}

.footer-bottom-links a:hover {
  color: var(--primary);
}

/* ========== 响应式 ========== */
@media (max-width: 63.99em) {
  .side-nav {
    display: none;
  }

  .main-area,
  .site-footer {
    margin-left: 0;
  }

  .mobile-header {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .container,
  .grid-container.container {
    padding: 0 20px;
  }

  .article-banner h1 {
    font-size: 34px;
  }
}

@media (max-width: 39.99em) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .article-banner {
    padding: 40px 0 36px;
  }

  .article-banner h1 {
    font-size: 28px;
  }

  .article-body {
    font-size: 16px;
  }

  .article-body h2 {
    font-size: 22px;
  }

  .article-body h3 {
    font-size: 19px;
  }

  .breadcrumb {
    font-size: 13px;
    gap: 6px;
  }

  .breadcrumb .current {
    max-width: 180px;
  }

  .article-main {
    padding-top: 36px;
  }

  .related-section {
    margin-top: 48px;
    padding-top: 32px;
  }

  .article-cta {
    margin: 48px 0 56px;
    padding: 32px 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .container,
  .grid-container.container {
    padding: 0 16px;
  }
}

/* roulang page: category2 */
:root {
            --bg-primary: #050D16;
            --bg-secondary: #0A1828;
            --brand: #00D9C0;
            --brand-deep: #05222A;
            --sub-blue: #2A6FA8;
            --text-main: #F0F7FF;
            --text-sub: #9AB3C8;
            --text-dim: #5C7A92;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
            --glow: 0 0 24px rgba(0, 217, 192, 0.20);
            --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html,
        body,
        div,
        span,
        h1,
        h2,
        h3,
        h4,
        p,
        ul,
        ol,
        li,
        dl,
        dt,
        dd,
        blockquote,
        figure,
        figcaption,
        table,
        form,
        input,
        button,
        textarea {
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
            overflow-x: hidden;
        }

        ul,
        ol {
            list-style: none;
        }

        a {
            color: var(--sub-blue);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--brand);
        }

        img {
            max-width: 100%;
            display: block;
        }

        input,
        button,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 1;
        }

        .container-narrow {
            max-width: 880px;
        }

        .btn-primary,
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            text-decoration: none;
            cursor: pointer;
            border: 1px solid transparent;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
        }

        .btn-primary {
            background: var(--brand);
            color: var(--brand-deep);
            box-shadow: 0 0 24px rgba(0, 217, 192, 0.25);
        }

        .btn-primary:hover {
            background: #35e8d2;
            color: var(--brand-deep);
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(0, 217, 192, 0.38);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--glass-border);
            color: var(--text-main);
        }

        .btn-ghost:hover {
            border-color: rgba(0, 217, 192, 0.6);
            color: var(--brand);
            background: rgba(0, 217, 192, 0.06);
            transform: translateY(-2px);
        }

        .btn-ghost:active {
            transform: scale(0.97);
        }

        .site-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: 240px;
            height: 100vh;
            background: rgba(10, 24, 40, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-right: 1px solid rgba(255, 255, 255, 0.08);
            padding: 28px 20px 24px;
            display: flex;
            flex-direction: column;
            z-index: 300;
            overflow-y: auto;
        }

        .site-nav::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image:
                radial-gradient(circle at 20% 30%, rgba(0, 217, 192, 0.035), transparent 42px),
                radial-gradient(circle at 80% 70%, rgba(42, 111, 168, 0.07), transparent 60px);
            pointer-events: none;
        }

        .brand-area {
            position: relative;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-main);
            text-decoration: none;
            transition: opacity 0.3s ease;
        }

        .brand-logo:hover {
            opacity: 0.88;
        }

        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 217, 192, 0.14);
            border: 1px solid rgba(0, 217, 192, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            font-size: 20px;
            box-shadow: 0 0 18px rgba(0, 217, 192, 0.12);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: 0.4px;
            color: var(--text-main);
        }

        .brand-text small {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-sub);
            margin-top: 2px;
            letter-spacing: 1px;
        }

        .side-menu.menu {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin: 0;
            padding: 22px 0;
            background: transparent;
            list-style: none;
            flex: 1;
        }

        .side-menu.menu li {
            flex: 0 0 auto;
            margin: 0;
        }

        .side-menu .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            border-left: 3px solid transparent;
            background: transparent;
            text-decoration: none;
            transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
        }

        .side-menu .nav-item i {
            width: 20px;
            text-align: center;
            color: var(--text-dim);
            transition: color 0.3s ease;
        }

        .side-menu .nav-item:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.04);
        }

        .side-menu .nav-item:hover i {
            color: var(--brand);
        }

        .side-menu .nav-item.active {
            color: var(--text-main);
            background: rgba(0, 217, 192, 0.06);
            border-left: 3px solid var(--brand);
            font-weight: 600;
        }

        .side-menu .nav-item.active i {
            color: var(--brand);
        }

        .side-bottom {
            position: relative;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 18px;
        }

        .side-bottom p {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-dim);
            margin-bottom: 6px;
        }

        .side-bottom i {
            color: var(--brand);
            font-size: 14px;
            width: 18px;
            text-align: center;
        }

        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 600;
            height: 56px;
            background: rgba(10, 24, 40, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-main);
            font-weight: 700;
            font-size: 16px;
            text-decoration: none;
        }

        .mobile-brand i {
            color: var(--brand);
            font-size: 20px;
        }

        .hamburger {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: border-color 0.3s ease, color 0.3s ease;
        }

        .hamburger:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(5, 13, 22, 0.6);
            z-index: 119;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -290px;
            width: 280px;
            height: 100vh;
            background: rgba(10, 24, 40, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid rgba(255, 255, 255, 0.08);
            z-index: 700;
            padding: 28px 24px;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            flex-direction: column;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .drawer-close {
            align-self: flex-end;
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 10px;
            color: var(--text-sub);
            cursor: pointer;
            font-size: 15px;
            margin-bottom: 24px;
            transition: color 0.3s ease, border-color 0.3s ease;
        }

        .drawer-close:hover {
            color: var(--brand);
            border-color: var(--brand);
        }

        .drawer-menu {
            display: grid;
            gap: 2px;
        }

        .drawer-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 10px;
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            text-decoration: none;
            transition: color 0.3s ease, background 0.3s ease;
        }

        .drawer-menu a i {
            width: 20px;
            text-align: center;
            color: var(--text-dim);
        }

        .drawer-menu a:hover {
            color: var(--brand);
            background: rgba(0, 217, 192, 0.04);
        }

        .drawer-menu a:hover i {
            color: var(--brand);
        }

        .drawer-menu a.active {
            color: var(--brand);
            font-weight: 600;
        }

        .drawer-menu a.active i {
            color: var(--brand);
        }

        .main-area {
            margin-left: 240px;
            min-height: 100vh;
            position: relative;
            overflow: hidden;
        }

        .main-area::before {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            right: -160px;
            top: 18%;
            background: radial-gradient(circle, rgba(0, 217, 192, 0.045), transparent 68%);
            pointer-events: none;
            z-index: 0;
        }

        .category-hero {
            position: relative;
            min-height: 460px;
            display: flex;
            align-items: center;
            padding: 96px 0 72px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(125deg, rgba(5, 13, 22, 0.95) 0%, rgba(5, 13, 22, 0.74) 55%, rgba(10, 24, 40, 0.38) 100%);
            z-index: -1;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 82% 18%, rgba(0, 217, 192, 0.06), transparent 42%);
            z-index: -1;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            letter-spacing: 1.5px;
            color: var(--brand);
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.25);
            padding: 7px 16px;
            border-radius: 100px;
            margin-bottom: 24px;
        }

        .category-hero h1 {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 700;
            max-width: 780px;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 640px;
            margin-bottom: 12px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }

        .hero-fish {
            position: absolute;
            bottom: 24px;
            left: 0;
            width: 100%;
            pointer-events: none;
            opacity: 0.55;
        }

        .hero-fish svg {
            width: 100%;
            height: 60px;
        }

        .breadcrumb-bar {
            background: rgba(10, 24, 40, 0.55);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding: 13px 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-dim);
        }

        .breadcrumb-nav a {
            color: var(--text-sub);
            text-decoration: none;
        }

        .breadcrumb-nav a:hover {
            color: var(--brand);
        }

        .breadcrumb-nav i {
            font-size: 12px;
            color: var(--text-dim);
        }

        .breadcrumb-nav span {
            color: var(--text-main);
        }

        .section {
            padding: 88px 0;
        }

        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-head h2,
        .section-head-left h2 {
            font-size: 30px;
            line-height: 1.35;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-head p,
        .section-head-left p {
            color: var(--text-sub);
            max-width: 620px;
            margin: 0 auto;
            font-size: 16px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 100px;
            background: rgba(0, 217, 192, 0.12);
            color: var(--brand);
            border: 1px solid rgba(0, 217, 192, 0.22);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-head-left .section-tag {
            margin-bottom: 12px;
        }

        .section-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .step-card {
            position: relative;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px 30px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow: hidden;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .step-card::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            height: 3px;
            width: 0;
            background: var(--brand);
            transition: width 0.4s ease;
        }

        .step-card:hover {
            transform: translateY(-6px);
            border-color: var(--brand);
            box-shadow: var(--glow);
        }

        .step-card:hover::after {
            width: 100%;
        }

        .step-num {
            display: block;
            font-size: 56px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, rgba(0, 217, 192, 0.5), rgba(42, 111, 168, 0.25));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .step-card p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.72;
        }

        .steps-note {
            margin-top: 32px;
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(0, 217, 192, 0.06);
            border: 1px dashed rgba(0, 217, 192, 0.28);
            border-radius: 12px;
            padding: 16px 20px;
            color: var(--text-sub);
        }

        .steps-note i {
            color: var(--brand);
            font-size: 20px;
            flex-shrink: 0;
        }

        .steps-note p {
            font-size: 14px;
            margin: 0;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .scenario-media img,
        .tips-media img {
            width: 100%;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform 0.45s ease, border-color 0.3s ease;
        }

        .scenario-media:hover img,
        .tips-media:hover img {
            transform: scale(1.01);
            border-color: rgba(0, 217, 192, 0.3);
        }

        .scenario-content h2 {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 18px;
        }

        .scenario-content>p {
            color: var(--text-sub);
            margin-bottom: 22px;
        }

        .scenario-list {
            display: grid;
            gap: 14px;
            margin-top: 16px;
        }

        .scenario-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 14px 16px;
            border-radius: 12px;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .scenario-list li:hover {
            border-color: rgba(0, 217, 192, 0.3);
            background: rgba(0, 217, 192, 0.03);
        }

        .scenario-list i {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.14);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .scenario-list strong {
            display: block;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .scenario-list span {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.65;
        }

        .tips-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .tips-content h2 {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 24px;
        }

        .tip-list {
            display: grid;
            gap: 14px;
        }

        .tip-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding-bottom: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .tip-list i {
            color: var(--brand);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .tip-list span {
            color: var(--text-sub);
            font-size: 15px;
        }

        .trust-section {
            padding: 36px 0;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }

        .trust-item strong {
            display: block;
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--brand);
            letter-spacing: 1px;
        }

        .trust-item span {
            display: block;
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 6px;
            letter-spacing: 1px;
        }

        .faq-accordion {
            margin-top: 24px;
        }

        .faq-accordion .accordion-item {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.11);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-accordion .accordion-item.is-active {
            border-color: rgba(0, 217, 192, 0.22);
            box-shadow: 0 6px 28px rgba(0, 0, 0, 0.18);
        }

        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            background: transparent !important;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 22px;
            line-height: 1.55;
            border: 0 !important;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .faq-accordion .accordion-title:hover {
            background: rgba(0, 217, 192, 0.045) !important;
            color: var(--text-main);
        }

        .faq-accordion .accordion-title::before,
        .faq-accordion .accordion-title::after {
            display: none !important;
        }

        .faq-accordion .accordion-title i {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.1);
            border: 1px solid rgba(0, 217, 192, 0.25);
            color: var(--brand);
            font-size: 13px;
            transition: transform 0.35s ease, background 0.3s ease;
        }

        .faq-accordion .accordion-item.is-active .accordion-title i {
            transform: rotate(135deg);
            background: rgba(0, 217, 192, 0.2);
        }

        .faq-accordion .accordion-content {
            padding: 4px 22px 22px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
            background: transparent !important;
            border: 0 !important;
        }

        .faq-accordion .accordion-content p {
            margin: 0;
        }

        .cta-section {
            position: relative;
            padding: 76px 0 100px;
        }

        .cta-box {
            position: relative;
            background: linear-gradient(135deg, rgba(10, 24, 40, 0.96) 0%, rgba(5, 13, 22, 0.88) 100%);
            border: 1px solid rgba(0, 217, 192, 0.2);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            text-align: center;
            box-shadow: 0 0 44px rgba(0, 217, 192, 0.08), var(--shadow);
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(0, 217, 192, 0.12), transparent 70%);
            pointer-events: none;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            left: -70px;
            bottom: -90px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(42, 111, 168, 0.14), transparent 70%);
            pointer-events: none;
        }

        .cta-box h2 {
            position: relative;
            z-index: 1;
            font-size: 30px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .cta-box p {
            position: relative;
            z-index: 1;
            color: var(--text-sub);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 16px;
        }

        .cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
            font-size: 18px;
            font-weight: 700;
            text-decoration: none;
            margin-bottom: 16px;
        }

        .footer-brand-logo .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            font-size: 18px;
        }

        .footer-brand p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
            margin: 0;
        }

        .footer-col h4 {
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col ul {
            display: grid;
            gap: 10px;
        }

        .footer-col a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-sub);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-col a:hover {
            color: var(--brand);
        }

        .footer-col a i {
            font-size: 12px;
            color: var(--text-dim);
            transition: color 0.3s ease;
        }

        .footer-col a:hover i {
            color: var(--brand);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-sub);
            font-size: 14px;
        }

        .footer-contact i {
            width: 18px;
            text-align: center;
            color: var(--brand);
            font-size: 14px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            color: var(--text-dim);
            font-size: 13px;
            gap: 12px;
        }

        .footer-bottom-links {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            color: var(--text-dim);
            text-decoration: none;
        }

        .footer-bottom-links a:hover {
            color: var(--brand);
        }

        @media (max-width: 63.9375em) {
            .site-nav {
                display: none;
            }

            .main-area {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }

            .scenario-grid,
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .section-head h2,
            .section-head-left h2,
            .scenario-content h2,
            .tips-content h2 {
                font-size: 26px;
            }

            .category-hero h1 {
                font-size: 34px;
            }

            .cta-box h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 39.9375em) {
            .container {
                padding: 0 16px;
            }

            .category-hero {
                min-height: auto;
                padding: 56px 0 48px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-ghost {
                justify-content: center;
                width: 100%;
            }

            .section {
                padding: 56px 0;
            }

            .steps-wrap {
                grid-template-columns: 1fr;
            }

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px 12px;
            }

            .trust-item strong {
                font-size: 34px;
            }

            .cta-box {
                padding: 40px 22px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn-primary,
            .cta-actions .btn-ghost {
                justify-content: center;
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .breadcrumb-nav {
                font-size: 13px;
            }

            .faq-accordion .accordion-title {
                font-size: 15px;
                padding: 16px 18px;
            }

            .faq-accordion .accordion-content {
                font-size: 14px;
                padding: 4px 18px 18px;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --bg-deep: #050D16;
            --bg-main: #0A1828;
            --bg-card: rgba(255, 255, 255, 0.05);
            --border-card: rgba(255, 255, 255, 0.12);
            --accent: #00D9C0;
            --accent-dark: #05222A;
            --secondary: #2A6FA8;
            --text-main: #F0F7FF;
            --text-sub: #9AB3C8;
            --text-dim: #5C7A92;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 24px rgba(0, 217, 192, 0.20);
            --nav-width: 240px;
            --space-section: 88px;
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-deep);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease, border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul {
            list-style: none;
            margin: 0;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 2;
        }

        /* ===== 背景装饰 ===== */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(circle at 15% 25%, rgba(0, 217, 192, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 85% 70%, rgba(42, 111, 168, 0.06) 0%, transparent 35%),
                radial-gradient(circle at 60% 10%, rgba(0, 217, 192, 0.03) 0%, transparent 30%);
            z-index: -1;
            pointer-events: none;
        }

        /* ===== 桌面左侧导航 ===== */
        .side-nav {
            width: var(--nav-width);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            background:
                repeating-linear-gradient(0deg, transparent 0px, transparent 3px, rgba(255, 255, 255, 0.012) 3px, rgba(255, 255, 255, 0.012) 4px),
                rgba(10, 24, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-right: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-direction: column;
            padding: 28px 16px;
            z-index: 100;
        }
        .brand-area {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 12px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 24px;
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            min-width: 42px;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.35);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 20px;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-main);
            line-height: 1.4;
            white-space: nowrap;
        }
        .brand-sub {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-dim);
            letter-spacing: 1px;
        }
        .nav-menu {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 14px;
            border-radius: 10px;
            color: var(--text-sub);
            font-size: 14.5px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
            line-height: 1.4;
            background: transparent;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            color: var(--text-dim);
            transition: color 0.3s ease, transform 0.3s ease;
            font-size: 14px;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
        }
        .nav-link:hover i {
            color: var(--accent);
            transform: translateX(2px);
        }
        .nav-link.active {
            background: rgba(0, 217, 192, 0.06);
            color: var(--text-main);
            border-left-color: var(--accent);
            box-shadow: inset 0 0 20px rgba(0, 217, 192, 0.04);
        }
        .nav-link.active i {
            color: var(--accent);
        }
        .nav-footer {
            padding: 16px 12px 4px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-dim);
            font-size: 12.5px;
            line-height: 1.7;
        }
        .nav-footer .footer-mini {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 移动端头部 ===== */
        .mobile-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 56px;
            background: rgba(10, 24, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: none;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 150;
        }
        .mobile-header .brand-area {
            padding: 0;
            border: none;
            margin: 0;
            gap: 10px;
        }
        .mobile-header .brand-icon {
            width: 34px;
            height: 34px;
            min-width: 34px;
            font-size: 16px;
            border-radius: 10px;
        }
        .mobile-header .brand-text {
            font-size: 16px;
        }
        .mobile-menu-toggle {
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--text-main);
            font-size: 18px;
            transition: all 0.3s ease;
        }
        .mobile-menu-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 199;
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s ease;
        }
        .drawer-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: rgba(10, 24, 40, 0.96);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 200;
            transition: right 0.4s ease;
            padding: 28px 20px;
            display: flex;
            flex-direction: column;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 50%;
            color: var(--text-sub);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: all 0.3s ease;
        }
        .drawer-close:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .drawer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 20px;
        }
        .drawer-brand .brand-icon {
            width: 36px;
            height: 36px;
            min-width: 36px;
            font-size: 16px;
        }
        .drawer-brand .brand-text {
            font-size: 16px;
        }
        .drawer-nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .drawer-nav .nav-link {
            padding: 14px 14px;
        }
        .drawer-footer {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 16px;
            color: var(--text-dim);
            font-size: 12.5px;
            text-align: center;
        }

        /* ===== 主内容布局 ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-wrapper main {
            flex: 1;
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 13, 22, 0.68) 0%, rgba(5, 13, 22, 0.88) 100%);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(180deg, transparent, var(--bg-deep));
            z-index: 1;
            pointer-events: none;
        }
        .hero-wave {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60px;
            z-index: 1;
            pointer-events: none;
            fill: var(--bg-deep);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-dim);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: var(--text-sub);
            transition: color 0.3s ease;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb-sep {
            color: var(--text-dim);
            opacity: 0.6;
        }
        .breadcrumb .current {
            color: var(--text-main);
            font-weight: 500;
        }
        .page-kicker {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 100px;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.3);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .page-kicker i {
            font-size: 12px;
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 1px;
            line-height: 1.22;
            margin: 0 0 16px;
            max-width: 720px;
        }
        .hero-subtitle {
            max-width: 620px;
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-sub);
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid transparent;
            line-height: 1.5;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--accent-dark);
            box-shadow: 0 0 24px rgba(0, 217, 192, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(0, 217, 192, 0.4);
            color: var(--accent-dark);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            border-color: rgba(255, 255, 255, 0.18);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .btn-secondary:hover {
            border-color: rgba(0, 217, 192, 0.6);
            color: var(--accent);
            transform: translateY(-2px);
            background: rgba(255, 255, 255, 0.08);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
        }

        /* ===== 通用区块 ===== */
        .section {
            padding: var(--space-section) 0;
            position: relative;
        }
        .section + .section {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 100px;
            background: rgba(0, 217, 192, 0.1);
            border: 1px solid rgba(0, 217, 192, 0.25);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.5px;
            margin-bottom: 14px;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 44px;
        }
        .section-head.left {
            margin-bottom: 28px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.75;
        }

        /* ===== 企业概览 ===== */
        .about-section {
            overflow: hidden;
        }
        .about-media {
            position: relative;
        }
        .about-img {
            width: 100%;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            min-height: 280px;
        }
        .about-img-wrap {
            position: relative;
        }
        .about-img-wrap::before {
            content: '';
            position: absolute;
            top: -18px;
            right: -18px;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 217, 192, 0.18) 0%, transparent 70%);
            z-index: -1;
        }
        .check-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.65;
        }
        .check-list li i {
            color: var(--accent);
            font-size: 16px;
            margin-top: 3px;
        }
        .about-text p {
            color: var(--text-sub);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* ===== 联系渠道 ===== */
        .channels-section {
            background: rgba(255, 255, 255, 0.02);
        }
        .channels-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .channel-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }
        .channel-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .channel-card:hover {
            border-color: rgba(0, 217, 192, 0.45);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .channel-card:hover::after {
            opacity: 1;
        }
        .channel-card > i {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 16px;
            display: inline-block;
            background: rgba(0, 217, 192, 0.1);
            border-radius: 12px;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .channel-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .channel-card p {
            font-size: 14.5px;
            line-height: 1.7;
            color: var(--text-sub);
            margin-bottom: 16px;
        }
        .channel-card a,
        .channel-note {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            padding: 8px 0;
            border-bottom: 1px solid transparent;
            transition: border-color 0.3s ease;
        }
        .channel-card a:hover {
            border-bottom-color: var(--accent);
        }
        .channel-note {
            color: var(--text-main);
            background: rgba(0, 217, 192, 0.08);
            border: 1px solid rgba(0, 217, 192, 0.2);
            border-radius: 100px;
            padding: 6px 14px;
        }

        /* ===== 合作流程 ===== */
        .process-section {
            background: var(--bg-deep);
        }
        .process-media {
            position: relative;
        }
        .process-media img {
            width: 100%;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            min-height: 320px;
        }
        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .process-step {
            display: flex;
            gap: 18px;
            padding: 18px 20px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
            align-items: flex-start;
        }
        .process-step:hover {
            background: rgba(0, 217, 192, 0.06);
            border-color: rgba(0, 217, 192, 0.3);
            transform: translateX(4px);
        }
        .step-num {
            font-size: 22px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            min-width: 44px;
            padding-top: 4px;
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 5px;
        }
        .process-step p {
            font-size: 14.5px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 信任数据 ===== */
        .trust-section {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .trust-num {
            padding: 24px 12px;
        }
        .num-value {
            display: block;
            font-size: 52px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        .num-label {
            display: block;
            font-size: 13.5px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-deep);
        }
        .faq-inner {
            max-width: 800px;
            margin: 0 auto;
        }
        .accordion {
            background: transparent;
            border: none;
            border-radius: 0;
            list-style: none;
            margin: 0;
        }
        .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
        }
        .accordion-item:hover {
            border-color: rgba(0, 217, 192, 0.35);
        }
        .accordion-item.is-active {
            border-color: rgba(0, 217, 192, 0.45);
            background: rgba(0, 217, 192, 0.04);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: transparent;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 20px;
            border: none;
            line-height: 1.5;
            position: relative;
            cursor: pointer;
        }
        .accordion-title:hover,
        .accordion-title:focus {
            background: rgba(255, 255, 255, 0.03);
            color: var(--accent);
        }
        .accordion-title::before {
            display: none !important;
        }
        .accordion-title .faq-icon {
            position: relative;
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.12);
            border: 1px solid rgba(0, 217, 192, 0.25);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: transform 0.35s ease, background 0.35s ease, color 0.35s ease;
            line-height: 1;
        }
        .accordion-item.is-active .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: var(--accent-dark);
        }
        .accordion-content {
            background: transparent;
            border: none;
            padding: 0 20px 20px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.75;
        }
        .accordion-content p {
            margin: 0;
            padding-top: 2px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-deep);
            padding: 80px 0;
        }
        .cta-box {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
            background:
                radial-gradient(circle at 20% 0%, rgba(0, 217, 192, 0.1) 0%, transparent 45%),
                radial-gradient(circle at 80% 100%, rgba(42, 111, 168, 0.12) 0%, transparent 40%),
                rgba(10, 24, 40, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 1px solid rgba(0, 217, 192, 0.12);
        }
        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            border: 1px solid rgba(42, 111, 168, 0.15);
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.75;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
            position: relative;
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A1828;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 28px;
            margin-top: auto;
        }
        .page-hero+.site-footer {
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .footer-brand-logo .brand-icon {
            width: 38px;
            height: 38px;
            min-width: 38px;
            font-size: 17px;
        }
        .footer-brand-logo .brand-text {
            font-size: 16px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-dim);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 9px;
        }
        .footer-col ul li {
            font-size: 14px;
            color: var(--text-sub);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.6;
        }
        .footer-col ul li a {
            color: var(--text-sub);
            transition: color 0.3s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-col ul li i {
            color: var(--accent);
            font-size: 12px;
            width: 16px;
            text-align: center;
        }
        .footer-contact li {
            font-size: 14px;
        }
        .footer-contact li i {
            color: var(--accent);
            font-size: 14px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-dim);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-bottom-links a {
            color: var(--text-dim);
        }
        .footer-bottom-links a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1023.98px) {
            .side-nav {
                display: none;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }
            .mobile-header {
                display: flex;
            }
            .container-custom {
                padding: 0 24px;
            }
            .page-hero {
                min-height: 380px;
                padding: 56px 0 48px;
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .section {
                --space-section: 64px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media screen and (max-width: 767.98px) {
            .container-custom {
                padding: 0 16px;
            }
            .page-hero {
                min-height: 340px;
            }
            .page-hero h1 {
                font-size: 30px;
                line-height: 1.3;
            }
            .hero-subtitle {
                font-size: 15.5px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .btn-lg {
                width: 100%;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .section {
                --space-section: 52px;
            }
            .channels-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .channel-card {
                padding: 24px 20px;
            }
            .process-step {
                padding: 16px;
                flex-direction: column;
                gap: 8px;
            }
            .step-num {
                min-width: auto;
                font-size: 18px;
            }
            .trust-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .num-value {
                font-size: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box {
                padding: 36px 20px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box p {
                font-size: 15px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .about-media {
                margin-top: 24px;
            }
            .process-media {
                margin-bottom: 24px;
            }
        }

        @media screen and (max-width: 520px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .page-kicker {
                font-size: 12px;
            }
            .breadcrumb {
                font-size: 13px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .channel-card > i {
                width: 48px;
                height: 48px;
                font-size: 22px;
            }
            .btn {
                padding: 12px 20px;
                font-size: 14px;
            }
        }