/* roulang page: index */
/* ===== 设计变量与基础重置 ===== */
    :root {
      --deep-charcoal: #1E1E24;
      --champagne-start: #C8A96E;
      --champagne-end: #E0C78C;
      --champagne-light: rgba(200, 169, 110, 0.15);
      --bg-warm-light: #F7F5F2;
      --text-primary: #2C2C34;
      --text-secondary: #5A5A6E;
      --text-muted: #7A7A8A;
      --border-light: #E8E6E1;
      --border-input: #D1CFC9;
      --white: #FFFFFF;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
      --shadow-focus: 0 0 0 3px rgba(200, 169, 110, 0.2);
      --radius-card: 24px;
      --radius-btn: 24px;
      --radius-badge: 40px;
      --transition-smooth: all 0.25s ease;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm-light);
      color: var(--text-primary);
      line-height: 1.8;
      margin: 0;
      overflow-x: hidden;
      padding-bottom: 70px; /* 为移动端底部导航预留空间 */
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.3px;
    }

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

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

    /* 容器微调 */
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 16px;
      padding-right: 16px;
    }

    /* ===== 导航：桌面固定顶部 ===== */
    .navbar-custom {
      background-color: var(--deep-charcoal);
      padding: 12px 0;
      position: sticky;
      top: 0;
      z-index: 1050;
      box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: 1px;
      background: linear-gradient(135deg, var(--champagne-start), var(--champagne-end));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-link-custom {
      color: #ddd !important;
      font-weight: 500;
      margin: 0 12px;
      position: relative;
      padding: 6px 0;
      font-size: 0.95rem;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--champagne-start) !important;
    }
    .nav-link-custom::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(to right, var(--champagne-start), var(--champagne-end));
      transition: width 0.25s ease;
    }
    .nav-link-custom:hover::after,
    .nav-link-custom.active::after {
      width: 100%;
    }

    /* 移动端全屏抽屉 */
    .mobile-offcanvas {
      background-color: var(--deep-charcoal);
    }
    .mobile-offcanvas .nav-link-custom {
      font-size: 1.2rem;
      margin: 10px 0;
      color: #fff !important;
    }
    .offcanvas-header {
      border-bottom: 1px solid rgba(255,255,255,0.15);
    }

    /* 底部Tab导航 (移动端) */
    .bottom-tab-nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: #fff;
      border-top: 1px solid #eee;
      display: flex;
      justify-content: space-around;
      align-items: center;
      padding: 8px 0 12px;
      z-index: 1060;
      box-shadow: 0 -2px 10px rgba(0,0,0,0.03);
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: #888;
      font-size: 0.7rem;
      transition: 0.2s;
    }
    .tab-item i {
      font-size: 1.4rem;
      margin-bottom: 2px;
    }
    .tab-item.active {
      color: var(--champagne-start);
      font-weight: 600;
    }

    /* ===== Hero 区块 ===== */
    .hero-section {
      background: linear-gradient(135deg, rgba(30,30,36,0.7) 0%, rgba(30,30,36,0.4) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-overlay {
      background: linear-gradient(135deg, rgba(200,169,110,0.15) 0%, rgba(200,169,110,0.05) 100%);
      width: 100%;
      height: 100%;
      position: absolute;
      top: 0;
      left: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.3;
      text-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: #e0e0e0;
      max-width: 600px;
      margin: 20px 0 30px;
    }

    /* 按钮体系 */
    .btn-primary-gold {
      background: linear-gradient(135deg, var(--champagne-start), var(--champagne-end));
      border: none;
      color: #1E1E24;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      box-shadow: 0 6px 14px rgba(200,169,110,0.3);
      transition: var(--transition-smooth);
    }
    .btn-primary-gold:hover {
      background: linear-gradient(135deg, #b8944f, #cfb075);
      box-shadow: 0 10px 20px rgba(200,169,110,0.4);
      transform: translateY(-2px);
      color: #1E1E24;
    }
    .btn-outline-gold {
      border: 2px solid var(--champagne-start);
      color: var(--champagne-start);
      background: transparent;
      border-radius: var(--radius-btn);
      padding: 10px 30px;
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    .btn-outline-gold:hover {
      background: linear-gradient(135deg, var(--champagne-start), var(--champagne-end));
      color: #1E1E24;
      border-color: transparent;
    }

    /* 通用板块 */
    .section-padding {
      padding: 100px 0;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 1rem;
    }
    .text-champagne {
      color: var(--champagne-start);
    }

    /* 卡片系统 */
    .custom-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      height: 100%;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .custom-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .icon-gold {
      color: var(--champagne-start);
      font-size: 2.8rem;
      margin-bottom: 20px;
    }

    /* 数据徽章 */
    .badge-capsule {
      background: linear-gradient(135deg, var(--champagne-start), var(--champagne-end));
      border-radius: var(--radius-badge);
      padding: 8px 20px;
      display: inline-flex;
      align-items: baseline;
      gap: 6px;
      color: #1E1E24;
      font-weight: 700;
    }
    .badge-number {
      font-size: 1.8rem;
      font-weight: 700;
    }

    /* FAQ 折叠重写 */
    .accordion-custom .accordion-item {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card) !important;
      margin-bottom: 16px;
      background: #fff;
    }
    .accordion-custom .accordion-button {
      font-weight: 600;
      font-size: 1.1rem;
      padding: 20px 24px;
      background: #fff;
      border-radius: var(--radius-card) !important;
      box-shadow: none;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      border: 1px solid var(--champagne-start);
      background: #fffdf7;
      color: var(--text-primary);
    }

    /* 证言轮播 */
    .testimonial-card {
      background: #fff;
      border-radius: 20px;
      padding: 28px;
    }

    /* 页脚 */
    .footer-dark {
      background: var(--deep-charcoal);
      color: #ccc;
      padding: 60px 0 30px;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .section-padding {
        padding: 60px 0;
      }
      .navbar-custom {
        padding: 8px 0;
      }
      .btn-primary-gold, .btn-outline-gold {
        width: 100%;
        display: block;
        text-align: center;
      }
    }
    @media (min-width: 992px) {
      .bottom-tab-nav {
        display: none;
      }
    }