/* roulang page: index */
:root {
      --deep-blue: #0B1A2E;
      --gold: #C8A96E;
      --gold-light: #e0c68c;
      --purple-gray: #4A4F66;
      --warm-bg: #FAF9F7;
      --white: #FFFFFF;
      --text-main: #1e2b3c;
      --text-soft: #5e6b7c;
      --border-light: #e9e5df;
      --shadow-card: 0 4px 24px rgba(11, 26, 46, 0.06);
      --shadow-hover: 0 12px 32px rgba(11, 26, 46, 0.12);
      --radius-card: 16px;
      --radius-btn: 40px;
      --font-head: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, -apple-system, sans-serif;
      --transition-smooth: all 0.3s cubic-bezier(0.2, 0.0, 0, 1.0);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--warm-bg);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 17px;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, .nav-brand, .hero-title, .section-title {
      font-family: var(--font-head);
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 导航双行杂志频道式 */
    .navbar-custom {
      background-color: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
      position: sticky;
      top: 0;
      z-index: 1020;
      transition: var(--transition-smooth);
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .logo-text {
      font-size: 28px;
      font-weight: 600;
      color: var(--deep-blue);
      letter-spacing: 2px;
    }
    .logo-text span {
      color: var(--gold);
      font-size: 22px;
      margin-left: 4px;
    }
    .logo-domain {
      font-size: 13px;
      color: var(--purple-gray);
      margin-left: 10px;
      font-weight: 400;
      letter-spacing: 0.3px;
    }
    .brand-icons {
      display: flex;
      gap: 20px;
      color: var(--purple-gray);
      font-size: 18px;
    }
    .channel-row {
      display: flex;
      align-items: center;
      gap: 32px;
      padding: 10px 0;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-row::-webkit-scrollbar {
      display: none;
    }
    .channel-link {
      font-weight: 500;
      color: var(--text-soft);
      font-size: 16px;
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
    }
    .channel-link.active, .channel-link:hover {
      color: var(--gold);
    }
    .channel-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--gold);
      border-radius: 2px;
    }
    /* 汉堡菜单移动端 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--deep-blue);
    }
    @media (max-width: 768px) {
      .channel-row {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        padding: 20px;
        box-shadow: 0 20px 30px rgba(0,0,0,0.05);
      }
      .channel-row.open {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .brand-icons {
        gap: 12px;
      }
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #0B1A2E 0%, #1e2f44 100%);
      position: relative;
      overflow: hidden;
      padding: 80px 0;
      color: white;
    }
    .hero-particles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }
    .particle {
      position: absolute;
      background: var(--gold);
      border-radius: 50%;
      opacity: 0.2;
      animation: float 6s infinite alternate;
    }
    @keyframes float {
      0% { transform: translateY(0px) scale(1); }
      100% { transform: translateY(-30px) scale(1.2); opacity: 0.4; }
    }
    .hero-title {
      font-size: 56px;
      line-height: 1.1;
      font-weight: 600;
      color: white;
    }
    .hero-sub {
      font-size: 18px;
      color: #cbd5e1;
      max-width: 480px;
      margin: 24px 0 32px;
    }
    .btn-gold {
      background: var(--gold);
      color: var(--deep-blue);
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 600;
      border: none;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 14px rgba(200, 169, 110, 0.3);
    }
    .btn-gold:hover {
      background: var(--gold-light);
      box-shadow: 0 8px 22px rgba(200, 169, 110, 0.5);
      transform: translateY(-2px);
    }
    .btn-outline-light-custom {
      border: 1px solid white;
      background: transparent;
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 36px;
      font-weight: 500;
    }
    .btn-outline-light-custom:hover {
      background: white;
      color: var(--deep-blue);
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 36px;
      }
    }
    /* 板块间距 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 80px 0;
      }
    }
    .section-label {
      font-size: 14px;
      color: var(--gold);
      letter-spacing: 2px;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 40px;
      font-weight: 600;
      color: var(--deep-blue);
      margin-bottom: 16px;
    }
    /* 功能非对称栅格 */
    .feature-large-card {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      padding: 40px;
      color: white;
      position: relative;
      overflow: hidden;
      min-height: 360px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }
    .feature-large-card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(11,26,46,0.85) 0%, rgba(11,26,46,0.2) 100%);
    }
    .feature-large-card h3, .feature-large-card p {
      position: relative;
      z-index: 2;
    }
    .feature-small-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--gold);
      transition: var(--transition-smooth);
    }
    .feature-small-card:hover {
      border-left-width: 8px;
      box-shadow: var(--shadow-hover);
    }
    /* 场景横向滚动 */
    .scenario-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scroll-snap-type: x mandatory;
    }
    .scenario-card {
      flex: 0 0 280px;
      background: white;
      border-radius: 20px;
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      border: 1px solid rgba(200,169,110,0.2);
      transition: var(--transition-smooth);
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--gold);
    }
    .scenario-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      border-radius: 20px 20px 0 0;
    }
    /* 案例大数字 */
    .case-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--gold);
      line-height: 1.2;
    }
    /* 价格卡片 */
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 36px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .pricing-card.popular {
      border: 2px solid var(--gold);
      transform: scale(1.03);
      box-shadow: 0 20px 40px rgba(11,26,46,0.1);
    }
    .price-amount {
      font-size: 48px;
      font-weight: 700;
      color: var(--deep-blue);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--deep-blue);
      box-shadow: none;
      border-color: var(--gold);
    }
    .accordion-button:focus {
      border-color: var(--gold);
      box-shadow: 0 0 0 3px rgba(200,169,110,0.25);
    }
    /* CTA横幅 */
    .cta-banner {
      background: var(--deep-blue);
      border-radius: 24px;
      padding: 60px;
    }
    .footer-link {
      color: var(--text-soft);
      transition: 0.2s;
    }
    .footer-link:hover {
      color: var(--gold);
    }