/* roulang page: index */
:root {
      --primary: #0A2342;
      --primary-dark: #091A2E;
      --accent-cyan: #00B4D8;
      --accent-orange: #FF6B35;
      --bg-light: #F8FAFC;
      --white: #FFFFFF;
      --text-body: #1E293B;
      --text-muted: #475569;
      --border: #E2E8F0;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(10,35,66,0.06);
      --shadow-hover: 0 8px 30px rgba(10,35,66,0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: 0.25s ease;
    }
    * { box-sizing: border-box; }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-body);
      margin: 0;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; }
    h1, h2, h3, h4 { color: var(--primary); margin-top: 0; }
    h1 { font-size: 2.75rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
    h2 { font-size: 2rem; font-weight: 600; margin-bottom: 1rem; }
    h3 { font-size: 1.35rem; font-weight: 600; }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航双行杂志频道式 */
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i { color: var(--accent-cyan); font-size: 2rem; }
    .contact-top { font-size: 0.9rem; color: var(--text-muted); display: flex; align-items: center; gap: 1rem; }
    .channel-nav {
      background: #F1F5F9;
      padding: 8px 0;
      border-radius: 8px;
      margin: 10px 0 0;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .channel-nav a {
      padding: 8px 18px;
      border-radius: 30px;
      font-weight: 500;
      color: var(--primary);
      transition: background 0.2s, color 0.2s;
      font-size: 0.95rem;
    }
    .channel-nav a:hover, .channel-nav a.active {
      background: var(--primary);
      color: white;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary);
      cursor: pointer;
    }
    /* Hero 数据看板 */
    .hero {
      padding: 60px 0 50px;
      background: linear-gradient(135deg, #f0f4fc 0%, #ffffff 100%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.08;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.25;
      margin-bottom: 1rem;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      max-width: 600px;
    }
    .data-dashboard {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin: 2.5rem 0 1.5rem;
      background: rgba(255,255,255,0.7);
      backdrop-filter: blur(6px);
      padding: 24px;
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
    }
    .stat-card {
      flex: 1 1 180px;
      text-align: center;
      padding: 10px;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-orange);
      display: flex;
      align-items: baseline;
      justify-content: center;
      gap: 4px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 5px;
    }
    .btn {
      display: inline-block;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      cursor: pointer;
      border: none;
    }
    .btn-primary { background: var(--accent-cyan); color: white; }
    .btn-primary:hover { background: #0096B0; transform: scale(1.03); box-shadow: 0 6px 15px rgba(0,180,216,0.3); }
    .btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
    .btn-outline:hover { background: var(--primary); color: white; }
    .btn-cta { background: var(--accent-orange); color: white; padding: 14px 32px; font-size: 1.1rem; box-shadow: 0 4px 12px rgba(255,107,53,0.3); }
    .btn-cta:hover { background: #E55A2B; transform: translateY(-2px); }
    /* 通用区块 */
    section { padding: 80px 0; }
    .section-title { text-align: center; margin-bottom: 3rem; }
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
    }
    .card-link {
      margin-top: auto;
      color: var(--accent-cyan);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }
    .comparison-table {
      background: white;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .table-row {
      display: flex;
      border-bottom: 1px solid var(--border);
    }
    .table-cell {
      flex: 1;
      padding: 16px 20px;
    }
    .highlight { color: var(--accent-orange); font-weight: 700; }
    .steps-horizontal {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }
    .step-item {
      flex: 1 1 180px;
      text-align: center;
      padding: 20px;
      background: white;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      background: var(--accent-cyan);
      color: white;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
      font-weight: 700;
    }
    .partner-wall {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
      align-items: center;
      filter: grayscale(1);
      opacity: 0.7;
    }
    .partner-wall img {
      height: 48px;
      transition: 0.2s;
    }
    .partner-wall img:hover { filter: none; opacity: 1; }
    .accordion-title {
      font-size: 1.1rem;
      font-weight: 600;
      background: white;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 16px 20px;
      margin-bottom: 8px;
      cursor: pointer;
    }
    .accordion-content {
      padding: 0 20px 16px;
      color: var(--text-muted);
    }
    .dark-cta {
      background: var(--primary);
      color: white;
      border-radius: 16px;
      padding: 60px 40px;
      text-align: center;
    }
    .dark-cta h2 { color: white; }
    .footer {
      background: var(--primary-dark);
      color: #CBD5E1;
      padding: 50px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer a { color: #CBD5E1; }
    .footer a:hover { color: white; }
    .copyright {
      border-top: 1px solid #334155;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 1024px) {
      .card-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      .channel-nav { display: none; flex-direction: column; background: white; }
      .channel-nav.open { display: flex; }
      .mobile-menu-toggle { display: block; }
      .brand-row { flex-wrap: wrap; }
      .card-grid { grid-template-columns: 1fr; }
      .data-dashboard { flex-direction: column; }
      .steps-horizontal { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }