/* roulang page: index */
:root {
      --bs-primary: #00F0FF;
      --bs-dark: #080C18;
      --bs-body-bg: #080C18;
      --bs-body-color: #CBD5E1;
      --bs-border-radius: 16px;
      --bs-border-radius-sm: 12px;
      --bs-border-radius-lg: 16px;
      --wk-glow: rgba(0, 240, 255, 0.6);
      --wk-purple: #A855F7;
      --wk-card-bg: rgba(255, 255, 255, 0.04);
      --wk-card-border: rgba(255, 255, 255, 0.08);
      --wk-text-muted: #94A3B8;
      --wk-section-gap: 120px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: #080C18;
      color: #CBD5E1;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    .inter-font {
      font-family: 'Inter', "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    a {
      color: #00F0FF;
      text-decoration: none;
      transition: color 0.25s ease;
    }
    a:hover {
      color: #A855F7;
    }

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

    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 自定义导航双层结构 */
    .navbar-custom {
      background: rgba(8, 12, 24, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1030;
      padding: 0;
    }

    .nav-top-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
    }

    .logo-text {
      font-size: 24px;
      font-weight: 700;
      background: linear-gradient(135deg, #00F0FF 0%, #A855F7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      font-family: 'Inter', "PingFang SC", sans-serif;
    }

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

    .btn-enter {
      background: #00F0FF;
      color: #080C18;
      font-weight: 600;
      padding: 8px 20px;
      border-radius: 12px;
      border: none;
      transition: all 0.25s ease;
      font-size: 14px;
      white-space: nowrap;
    }
    .btn-enter:hover {
      background: #A855F7;
      color: white;
      box-shadow: 0 0 20px rgba(0,240,255,0.6);
    }

    .search-icon {
      color: #CBD5E1;
      font-size: 18px;
      cursor: pointer;
      transition: color 0.2s;
    }
    .search-icon:hover {
      color: #00F0FF;
    }

    .channel-tabs {
      display: flex;
      gap: 8px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      padding-bottom: 8px;
      scrollbar-width: none;
      -ms-overflow-style: none;
      border-top: 1px solid rgba(255,255,255,0.04);
      padding-top: 10px;
    }
    .channel-tabs::-webkit-scrollbar {
      display: none;
    }

    .channel-tab {
      color: #94A3B8;
      font-weight: 500;
      font-size: 15px;
      padding: 6px 16px;
      border-radius: 20px;
      white-space: nowrap;
      transition: all 0.2s;
      background: transparent;
      border: none;
      cursor: pointer;
      text-decoration: none;
    }
    .channel-tab:hover {
      color: #00F0FF;
      background: rgba(0,240,255,0.05);
    }
    .channel-tab.active {
      color: white;
      border-bottom: 3px solid #00F0FF;
      border-radius: 0;
      background: transparent;
      font-weight: 600;
    }

    /* 区块间距 */
    section {
      padding: var(--wk-section-gap) 0;
      scroll-margin-top: 110px;
    }
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    /* Hero */
    #hero {
      padding-top: 160px;
      padding-bottom: 100px;
      background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.08) 0%, transparent 50%);
      position: relative;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      background: linear-gradient(to right, #00F0FF, #A855F7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: #CBD5E1;
      margin-bottom: 32px;
      max-width: 500px;
    }
    .data-card-glass {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 24px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .metric-value {
      font-family: 'Inter', sans-serif;
      font-size: 28px;
      font-weight: 700;
      color: #00F0FF;
    }

    /* 卡片通用 */
    .glass-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 16px;
      padding: 24px;
      transition: all 0.3s ease;
      height: 100%;
    }
    .glass-card:hover {
      box-shadow: 0 8px 32px rgba(0,240,255,0.12);
      border-color: rgba(0,240,255,0.25);
      transform: translateY(-4px);
    }

    .icon-circle {
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: rgba(0,240,255,0.1);
      color: #00F0FF;
      font-size: 24px;
      margin-bottom: 16px;
    }

    .btn-primary-custom {
      background: #00F0FF;
      color: #080C18;
      font-weight: 600;
      border-radius: 12px;
      padding: 12px 28px;
      border: none;
      transition: 0.25s ease;
    }
    .btn-primary-custom:hover {
      box-shadow: 0 0 24px rgba(0,240,255,0.6);
      background: #00F0FF;
      color: #080C18;
    }
    .btn-outline-custom {
      border: 1px solid rgba(0,240,255,0.4);
      color: #00F0FF;
      background: transparent;
      font-weight: 600;
      border-radius: 12px;
      padding: 12px 28px;
      transition: 0.25s;
    }
    .btn-outline-custom:hover {
      background: rgba(0,240,255,0.1);
      border-color: #00F0FF;
      color: #00F0FF;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #F1F5F9;
      margin-bottom: 16px;
    }
    .text-muted-custom {
      color: #94A3B8;
      font-size: 14px;
    }
    .feature-image-wrap {
      border-radius: 16px;
      overflow: hidden;
      position: relative;
    }
    .feature-image-wrap img {
      transition: transform 0.3s;
      width: 100%;
      height: auto;
    }
    .feature-image-wrap:hover img {
      transform: scale(1.02);
    }

    /* 手风琴 */
    .accordion-button {
      background: rgba(255,255,255,0.02);
      color: #CBD5E1;
      font-weight: 600;
      border: none;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(0,240,255,0.04);
      color: #00F0FF;
      box-shadow: none;
    }
    .accordion-item {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.05);
    }

    footer a {
      color: #94A3B8;
    }
    footer a:hover {
      color: #00F0FF;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 28px;
      }
      .nav-top-row {
        padding: 10px 0;
      }
    }