/* roulang page: index */
:root {
      --primary: #1A3C5E;
      --primary-deep: #14304D;
      --accent: #C49A2B;
      --accent-light: rgba(196, 154, 43, 0.12);
      --bg: #FAF9F6;
      --card-bg: #FFFFFF;
      --text: #2C2C2C;
      --text-muted: #5A5A5A;
      --border: #E5E0D8;
      --success: #1F6E4A;
      --shadow: 0 4px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-img: 16px;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-cn);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      font-family: var(--font-cn);
      letter-spacing: -0.2px;
    }
    .section-spacing {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section-spacing {
        padding: 60px 0;
      }
      h1 { font-size: 28px !important; }
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航双层 */
    .navbar-custom {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: white;
      box-shadow: 0 1px 8px rgba(0,0,0,0.02);
    }
    .top-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary);
      text-decoration: none;
    }
    .brand i {
      font-size: 28px;
      color: var(--accent);
    }
    .search-cta {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .search-icon {
      color: var(--text-muted);
      font-size: 18px;
      cursor: pointer;
      transition: 0.2s;
    }
    .search-icon:hover { color: var(--primary); }
    .btn-primary-sm {
      background: var(--primary);
      color: white;
      border: none;
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      letter-spacing: 0.4px;
      transition: all 0.25s ease;
    }
    .btn-primary-sm:hover {
      background: var(--primary-deep);
      transform: scale(1.03);
    }
    .channel-row {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 10px 0 8px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-row::-webkit-scrollbar { display: none; }
    .pill-link {
      padding: 8px 20px;
      border-radius: 30px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      transition: all 0.2s ease;
      background: transparent;
      display: inline-block;
    }
    .pill-link.active, .pill-link:hover {
      background: var(--primary);
      color: white;
      font-weight: 600;
    }
    .pill-link.active {
      box-shadow: 0 4px 10px rgba(26,60,94,0.2);
    }
    /* Hero */
    .hero-img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-img);
      border: 1px solid var(--border);
      object-fit: cover;
    }
    .stat-item {
      font-family: var(--font-en);
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }
    .btn-outline-primary {
      border: 1px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.25s;
    }
    .btn-outline-primary:hover {
      background: rgba(26,60,94,0.08);
      color: var(--primary);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      border: none;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      transition: 0.25s;
    }
    .btn-accent:hover {
      background: #b0861f;
      transform: scale(1.03);
    }
    /* 卡片 */
    .card-custom {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow);
      padding: 28px;
      transition: all 0.25s ease;
      border: none;
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .icon-circle {
      font-size: 40px;
      color: var(--accent);
      margin-bottom: 18px;
    }
    .text-link {
      color: var(--accent);
      font-weight: 500;
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: 0.2s;
    }
    .text-link:hover {
      border-bottom: 1px solid var(--accent);
      color: #b0861f;
    }
    /* 案例瀑布 */
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow);
      overflow: hidden;
      transition: 0.25s;
      break-inside: avoid;
      margin-bottom: 30px;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-card img {
      width: 100%;
      display: block;
      transition: transform 0.4s ease;
    }
    .case-card:hover img {
      transform: scale(1.04);
    }
    .tag {
      background: rgba(196,154,43,0.1);
      color: #8b691b;
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 500;
    }
    /* 方案对比 */
    .plan-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow);
      position: relative;
    }
    .badge-hot {
      background: var(--accent);
      color: white;
      font-size: 12px;
      padding: 2px 12px;
      border-radius: 20px;
      position: absolute;
      top: 16px;
      right: 20px;
    }
    .check-list li {
      list-style: none;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .fa-check-circle { color: var(--success); }
    .fa-times-circle { color: #aaa; }
    /* FAQ */
    .accordion-button {
      font-weight: 600;
      color: var(--primary);
      background-color: transparent;
      box-shadow: none;
      font-size: 1.05rem;
      padding: 20px 0;
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(26,60,94,0.03);
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border);
      background: transparent;
    }
    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary);
      border-radius: 28px;
      padding: 60px 40px;
    }
    /* 页脚 */
    .footer {
      background: #F0EDE8;
      padding: 60px 0 30px;
      font-size: 15px;
      color: var(--text-muted);
    }
    .footer a {
      color: var(--text);
      text-decoration: none;
    }
    .footer a:hover { color: var(--primary); }