/* roulang page: index */
:root {
      --primary: #1A2238;
      --primary-dark: #0F141C;
      --accent: #E2B755;
      --accent-hover: #cf9f3c;
      --secondary: #4F5D75;
      --bg-light: #F7F8FA;
      --text-main: #0C1017;
      --text-body: #2D3748;
      --text-muted: #718096;
      --border-subtle: rgba(0, 0, 0, 0.08);
      --radius: 8px;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.65;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 顶部元数据状态条 */
    .top-meta-bar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 0.825rem;
      height: 38px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .top-meta-badge {
      background: rgba(226, 183, 85, 0.15);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 卡片化浮动控制面板导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 12px 0;
      background: transparent;
    }
    .nav-floating-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      box-shadow: 0 8px 24px rgba(15, 20, 28, 0.06);
      border: 1px solid var(--border-subtle);
      padding: 8px 16px;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.01em;
    }
    .brand-logo i {
      color: var(--accent);
      font-size: 1.45rem;
    }
    .nav-card-item {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--secondary);
      padding: 8px 14px;
      border-radius: 6px;
      border: 1px solid transparent;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .nav-card-item:hover, .nav-card-item.active {
      color: var(--primary);
      background: #F1F4F9;
      border-color: rgba(26, 34, 56, 0.06);
    }

    /* 统一按钮设计 */
    .btn-gold {
      background-color: var(--accent);
      color: #0F141C;
      font-weight: 700;
      border-radius: var(--radius);
      padding: 10px 24px;
      border: 1px solid var(--accent);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-gold:hover {
      background-color: var(--accent-hover);
      border-color: var(--accent-hover);
      color: #0F141C;
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(226, 183, 85, 0.28);
    }
    .btn-outline-gold {
      background-color: transparent;
      color: var(--accent);
      font-weight: 600;
      border-radius: var(--radius);
      padding: 10px 22px;
      border: 1px solid var(--accent);
      transition: var(--transition);
    }
    .btn-outline-gold:hover {
      background-color: var(--accent);
      color: #0F141C;
    }
    .btn-dark-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: var(--radius);
      padding: 10px 22px;
      border: 1px solid var(--primary);
      transition: var(--transition);
    }
    .btn-dark-primary:hover {
      background-color: var(--primary-dark);
      color: #FFFFFF;
      transform: translateY(-2px);
    }

    /* 板块通用标题与间距 */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 52px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.01em;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
      line-height: 1.6;
    }
    .badge-pill-custom {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 50px;
      background: rgba(226, 183, 85, 0.12);
      color: #9E7412;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    /* 卡片体系重塑 */
    .ui-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
      overflow: hidden;
    }
    .ui-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    /* Hero：裂变邀请首屏 */
    .hero-referral-band {
      background: linear-gradient(135deg, rgba(15, 20, 28, 0.94) 0%, rgba(26, 34, 56, 0.92) 100%), url('/assets/images/598a6b36c60c8fc4.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 100px 0 85px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .hero-h1 {
      font-size: 3.15rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 32px;
      max-width: 620px;
    }
    .referral-progress-card {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(226, 183, 85, 0.3);
      border-radius: var(--radius);
      padding: 30px;
    }
    .milestone-item {
      position: relative;
      text-align: center;
      z-index: 1;
    }
    .milestone-icon {
      width: 44px;
      height: 44px;
      background: var(--primary);
      border: 2px solid var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 10px;
      color: var(--accent);
      font-size: 1.1rem;
    }

    /* 表格定制 */
    .custom-spec-table {
      width: 100%;
      background: #FFFFFF;
      border-radius: var(--radius);
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border-subtle);
      overflow: hidden;
    }
    .custom-spec-table th {
      background: #F1F4F9;
      color: var(--primary);
      padding: 16px 20px;
      font-weight: 700;
      border-bottom: 1px solid var(--border-subtle);
    }
    .custom-spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-body);
      font-size: 0.95rem;
    }
    .custom-spec-table tr:last-child td {
      border-bottom: none;
    }
    .custom-spec-table tr.highlight-row {
      background: rgba(226, 183, 85, 0.05);
      font-weight: 600;
    }

    /* 流程步骤 */
    .flow-step-num {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      margin-bottom: 18px;
      box-shadow: 0 4px 12px rgba(26, 34, 56, 0.15);
    }

    /* 合作伙伴徽标网格 */
    .partner-tile {
      background: #FFFFFF;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius);
      padding: 24px 16px;
      text-align: center;
      font-weight: 600;
      color: var(--secondary);
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      transition: var(--transition);
    }
    .partner-tile:hover {
      border-color: var(--accent);
      color: var(--primary);
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
    }

    /* 深色沉浸式区 */
    .dark-section-bg {
      background-color: var(--primary-dark);
      color: #FFFFFF;
    }
    .dark-section-bg .section-title {
      color: #FFFFFF;
    }
    .dark-section-bg .section-subtitle {
      color: #94A3B8;
    }

    /* 手风琴重塑 */
    .accordion-item {
      border: 1px solid var(--border-subtle);
      margin-bottom: 14px;
      border-radius: var(--radius) !important;
      overflow: hidden;
      background: #FFFFFF;
    }
    .accordion-button {
      font-weight: 600;
      color: var(--primary);
      background: #FFFFFF;
      padding: 18px 24px;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: #9E7412;
      background: rgba(226, 183, 85, 0.08);
    }
    .accordion-body {
      padding: 18px 24px 24px;
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 响应式调整 */
    @media (max-width: 991px) {
      .hero-h1 {
        font-size: 2.35rem;
      }
      .section-wrap {
        padding: 60px 0;
      }
    }