/* roulang page: index */
:root {
      --primary-deep: #1A1A2E;
      --secondary-gold: #C9A96E;
      --accent-bright-gold: #D4AF37;
      --bg-warm: #F8F6F0;
      --card-bg: #FFFFFF;
      --card-border: #E8E4D9;
      --dark-bg: #0F0F1A;
      --text-main: #1A1A2E;
      --text-secondary: #5A5A6E;
      --text-muted: #8A8A9A;
      --text-on-dark: #FFFFFF;
      --success-green: #2D6A4F;
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --border-radius-badge: 20px;
      --shadow-card: 0 4px 20px rgba(26, 26, 46, 0.06);
      --shadow-card-hover: 0 8px 30px rgba(26, 26, 46, 0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --transition-smooth: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.5px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏 */
    .navbar-custom {
      background: rgba(15, 15, 26, 0.92);
      backdrop-filter: blur(16px);
      height: 72px;
      transition: height 0.3s ease;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }

    .navbar-scrolled {
      height: 64px;
    }

    .logo-area {
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .logo-main {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--secondary-gold);
      letter-spacing: 0.5px;
    }

    .logo-sub {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--accent-bright-gold);
    }

    .nav-links-desktop {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link-item {
      color: #C9C9D0;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition-smooth);
    }

    .nav-link-item:hover,
    .nav-link-item.active {
      color: var(--accent-bright-gold);
      border-bottom-color: var(--accent-bright-gold);
    }

    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn-primary-custom {
      background: var(--accent-bright-gold);
      color: var(--primary-deep);
      font-weight: 700;
      border: none;
      padding: 10px 24px;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.9rem;
    }

    .btn-primary-custom:hover {
      background: #B8962E;
      transform: translateY(-2px);
      color: var(--primary-deep);
    }

    .online-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--text-on-dark);
      font-size: 0.85rem;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--success-green);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(45, 106, 79, 0.7); }
      70% { box-shadow: 0 0 0 6px rgba(45, 106, 79, 0); }
      100% { box-shadow: 0 0 0 0 rgba(45, 106, 79, 0); }
    }

    /* 移动端菜单按钮 */
    .navbar-toggler-custom {
      background: transparent;
      border: none;
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .bar {
      width: 24px;
      height: 2px;
      background: var(--secondary-gold);
      transition: 0.3s;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(15,15,26,0.98);
      backdrop-filter: blur(20px);
      padding: 28px 0;
      flex-direction: column;
      align-items: center;
      gap: 24px;
      z-index: 999;
    }

    .mobile-menu a {
      color: #C9C9D0;
      font-size: 1.1rem;
      font-weight: 500;
    }

    /* Hero */
    .hero-section {
      min-height: 100vh;
      background: linear-gradient(135deg, #0F0F1A 0%, #1A1A2E 100%);
      position: relative;
      display: flex;
      align-items: center;
      padding-top: 72px;
      overflow: hidden;
    }

    .hero-bg-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.25;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      color: white;
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.15;
      color: var(--secondary-gold);
      margin-bottom: 1.2rem;
    }

    .dynamic-subtitle {
      font-size: 1.1rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2rem;
      min-height: 28px;
    }

    .stats-row {
      display: flex;
      gap: 40px;
      margin: 2rem 0;
      flex-wrap: wrap;
    }

    .stat-item h3 {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-bright-gold);
      margin-bottom: 4px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-outline-gold {
      background: transparent;
      border: 2px solid var(--secondary-gold);
      color: var(--secondary-gold);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-smooth);
    }

    .btn-outline-gold:hover {
      background: var(--secondary-gold);
      color: var(--primary-deep);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      right: 40px;
      color: var(--secondary-gold);
      font-size: 1.8rem;
      animation: float 2s infinite;
    }

    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(8px); }
      100% { transform: translateY(0); }
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--text-main);
      position: relative;
    }

    .section-title::after {
      content: "";
      display: block;
      width: 40px;
      height: 3px;
      background: var(--secondary-gold);
      margin: 8px auto 0;
    }

    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--border-radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }

    .card-custom:hover {
      box-shadow: var(--shadow-card-hover);
      border-color: var(--secondary-gold);
    }

    /* 核心优势网格 */
    .value-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 0.8fr;
      gap: 24px;
    }

    .large-card {
      grid-row: span 2;
    }

    /* 选项卡 */
    .tab-buttons .btn-tab {
      background: transparent;
      border: none;
      padding: 10px 24px;
      font-weight: 600;
      color: var(--text-secondary);
      border-bottom: 2px solid transparent;
    }

    .tab-buttons .btn-tab.active {
      color: var(--accent-bright-gold);
      border-bottom-color: var(--accent-bright-gold);
    }

    /* 横向滚动卡片 */
    .scroll-cards-wrapper {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 12px;
      scrollbar-width: thin;
    }

    .scene-card {
      min-width: 300px;
      background: white;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      border: 1px solid var(--card-border);
    }

    .scene-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }

    /* 价格卡片高亮 */
    .pricing-highlight {
      border: 2px solid var(--secondary-gold);
      transform: scale(1.02);
    }

    .btn-outline-secondary {
      border: 2px solid var(--secondary-gold);
      color: var(--secondary-gold);
    }

    /* FAQ */
    .faq-filter .filter-btn {
      background: transparent;
      border: none;
      padding: 10px 16px;
      text-align: left;
    }
    .faq-filter .filter-btn.active {
      border-left: 3px solid var(--accent-bright-gold);
    }

    .accordion-button:not(.collapsed) {
      background-color: white;
      color: var(--primary-deep);
    }

    footer {
      background: var(--dark-bg);
      color: var(--text-muted);
    }

    @media (max-width: 992px) {
      .nav-links-desktop, .nav-cta-group .online-badge {
        display: none;
      }
      .navbar-toggler-custom {
        display: flex;
      }
      .value-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.6rem;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .hero-title {
        font-size: 2rem;
      }
    }