/* roulang page: index */
:root {
      --deep-obsidian: #0F0F1A;
      --charcoal: #2D2D3A;
      --champion-gold-start: #D4AF37;
      --champion-gold-mid: #F0C75E;
      --champion-gold-end: #C8962E;
      --warm-white: #FAF9F6;
      --victory-red: #C83C2B;
      --soft-gray: #E8E8EC;
      --text-dark: #1E1E2A;
      --text-muted: #6B6B7A;
      --card-shadow: 0 2px 8px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 8px 28px rgba(0,0,0,0.08), 0 16px 40px rgba(0,0,0,0.1);
      --border-radius-lg: 16px;
      --border-radius-md: 12px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-number: 'DIN Alternate', 'PingFang SC', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-heading);
      background-color: #FFFFFF;
      color: var(--text-dark);
      margin: 0;
      line-height: 1.7;
      letter-spacing: 0.2px;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    a {
      text-decoration: none;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 金色渐变文字工具 */
    .gold-text {
      background: linear-gradient(135deg, var(--champion-gold-start), var(--champion-gold-mid), var(--champion-gold-end));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    /* 覆盖Bootstrap按钮 */
    .btn {
      border-radius: 50px;
      padding: 12px 32px;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.25s ease;
      letter-spacing: 0.3px;
      border: none;
    }
    .btn-primary-custom {
      background: linear-gradient(135deg, var(--champion-gold-start), var(--champion-gold-mid), var(--champion-gold-end));
      color: #0F0F1A;
      border: none;
    }
    .btn-primary-custom:hover {
      background: linear-gradient(135deg, var(--champion-gold-end), var(--champion-gold-mid), var(--champion-gold-start));
      color: #0F0F1A;
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
    }
    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--champion-gold-start);
      color: var(--champion-gold-start);
    }
    .btn-outline-gold:hover {
      background: rgba(212, 175, 55, 0.08);
      border-color: var(--champion-gold-mid);
      color: var(--champion-gold-mid);
    }
    /* 卡片样式覆盖 */
    .card {
      border-radius: var(--border-radius-lg);
      box-shadow: var(--card-shadow);
      border: 1px solid rgba(0,0,0,0.04);
      transition: all 0.25s ease;
      background-color: var(--warm-white);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }
    .badge-gold {
      background: linear-gradient(135deg, var(--champion-gold-start), var(--champion-gold-mid));
      color: #0F0F1A;
      font-weight: 600;
      border-radius: 30px;
      padding: 4px 12px;
    }
    /* 导航卡片化面板 */
    .navbar-custom {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      border-radius: var(--border-radius-lg);
      box-shadow: 0 8px 24px rgba(0,0,0,0.06);
      padding: 10px 24px;
      margin: 16px auto 0;
      max-width: 1200px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 16px;
      z-index: 1020;
    }
    .nav-logo {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--deep-obsidian);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .nav-logo i {
      color: var(--champion-gold-start);
      font-size: 1.8rem;
    }
    .nav-menu {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .nav-item-card {
      display: flex;
      align-items: center;
      gap: 6px;
      background: transparent;
      padding: 10px 18px;
      border-radius: 40px;
      color: var(--text-dark);
      font-weight: 500;
      transition: 0.2s;
      font-size: 0.95rem;
    }
    .nav-item-card i {
      font-size: 1rem;
      color: var(--charcoal);
    }
    .nav-item-card:hover, .nav-item-card.active {
      background: rgba(212, 175, 55, 0.12);
      color: #0F0F1A;
    }
    .mobile-bottom-bar {
      display: none;
    }
    /* Hero区 */
    .hero-section {
      background: linear-gradient(135deg, #0F0F1A 0%, #2D2D3A 100%);
      position: relative;
      overflow: hidden;
      border-radius: 0 0 40px 40px;
      margin-top: 20px;
    }
    .hero-section::before {
      content: "";
      position: absolute;
      top: -20%;
      right: -5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(212,175,55,0.12) 0%, transparent 70%);
      border-radius: 50%;
    }
    .data-badge-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: 12px;
      padding: 14px 18px;
      color: white;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .number-highlight {
      font-family: var(--font-number);
      font-weight: 700;
      font-size: 1.8rem;
      background: linear-gradient(135deg, #F0C75E, #D4AF37);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* 区块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 992px) {
      section {
        padding: 60px 0;
      }
      .navbar-custom {
        margin: 10px 12px;
      }
    }
    @media (max-width: 768px) {
      .navbar-custom .nav-menu {
        display: none;
      }
      .mobile-bottom-bar {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(20px);
        border-radius: 20px 20px 0 0;
        box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
        padding: 8px 16px;
        justify-content: space-around;
        z-index: 1030;
      }
      .mobile-tab {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.7rem;
        color: #6B6B7A;
        padding: 6px 8px;
        border-radius: 16px;
        transition: 0.2s;
      }
      .mobile-tab i {
        font-size: 1.2rem;
        margin-bottom: 2px;
      }
      .mobile-tab.active {
        color: #C8962E;
        background: rgba(212,175,55,0.1);
      }
      .hero-section h1 {
        font-size: 2rem !important;
      }
    }
    .footer-link {
      color: #AAA;
      transition: 0.2s;
    }
    .footer-link:hover {
      color: var(--champion-gold-mid);
    }
    .accordion-button:not(.collapsed) {
      background-color: transparent;
      color: var(--deep-obsidian);
      box-shadow: none;
      border-bottom: 1px solid var(--champion-gold-start);
    }
    .accordion-button:focus {
      border-color: var(--champion-gold-start);
      box-shadow: 0 0 0 2px rgba(212,175,55,0.25);
    }
    .accordion-item {
      border-radius: 12px !important;
      border: 1px solid #E8E8EC;
      margin-bottom: 12px;
    }
    .pricing-card-highlight {
      background: linear-gradient(135deg, #1A1A2E, #2D2D3A);
      border: 2px solid var(--champion-gold-start);
      color: white;
    }