/* roulang page: index */
:root {
      --deep-blue: #0B1A2F;
      --dark-panel: #0D2137;
      --cyan: #00E5FF;
      --cyan-dark: #00B8D4;
      --orange: #FF6D00;
      --text-primary: #E0E6ED;
      --text-secondary: #8899AA;
      --text-muted: #6A7B8C;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(255, 255, 255, 0.08);
      --glass-hover: rgba(255, 255, 255, 0.06);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
      --shadow-glow: 0 0 18px rgba(0, 229, 255, 0.5);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Inter", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-sans);
      background: linear-gradient(135deg, #0B1A2F 0%, #0D2137 100%);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: var(--cyan);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--cyan-dark);
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 导航系统 */
    #nav {
      position: sticky;
      top: 0;
      z-index: 40;
      backdrop-filter: blur(16px);
      background: rgba(11, 26, 47, 0.75);
      transition: background 0.3s ease, box-shadow 0.3s ease;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    #nav.scrolled {
      background: rgba(11, 26, 47, 0.92);
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }
    .nav-row1 {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      padding: 0 1.5rem;
      max-width: 1200px;
      margin: 0 auto;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand .logo-icon {
      font-size: 2rem;
      color: var(--cyan);
      filter: drop-shadow(0 0 8px rgba(0,229,255,0.6));
    }
    .brand .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
      color: #ffffff;
      text-shadow: 0 0 10px rgba(0,229,255,0.3);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .search-icon {
      background: none;
      border: none;
      color: var(--text-secondary);
      font-size: 1.3rem;
      cursor: pointer;
      transition: color 0.2s;
    }
    .search-icon:hover {
      color: var(--cyan);
    }
    .btn-nav-cta {
      background: var(--cyan);
      color: #0B1A2F;
      font-weight: 700;
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      letter-spacing: 0.5px;
      transition: all 0.25s ease;
      box-shadow: 0 0 12px rgba(0,229,255,0.4);
    }
    .btn-nav-cta:hover {
      background: #00f0ff;
      transform: scale(1.04);
      box-shadow: 0 0 20px rgba(0,229,255,0.7);
      color: #0B1A2F;
    }

    .nav-row2 {
      background: rgba(255,255,255,0.02);
      backdrop-filter: blur(8px);
      border-top: 1px solid rgba(255,255,255,0.05);
    }
    .channel-tabs {
      display: flex;
      align-items: center;
      gap: 6px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0.6rem 1.5rem;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-tabs::-webkit-scrollbar {
      display: none;
    }
    .pill-link {
      display: inline-block;
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      font-weight: 500;
      color: rgba(255,255,255,0.75);
      background: transparent;
      transition: all 0.2s ease;
    }
    .pill-link:hover {
      background: rgba(0,229,255,0.12);
      color: #fff;
    }
    .pill-link.active {
      background: var(--cyan);
      color: #0B1A2F;
      font-weight: 700;
      box-shadow: 0 0 16px rgba(0,229,255,0.5);
    }

    /* 区块通用 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 50px 0;
      }
    }

    /* Hero */
    #hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      background-color: rgba(11,26,47,0.7);
    }
    #hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,26,47,0.85) 0%, rgba(13,33,55,0.65) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
      padding: 2rem 1rem;
    }
    h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #ffffff;
      text-shadow: 0 0 30px rgba(0,229,255,0.35);
      margin-bottom: 1.5rem;
      line-height: 1.2;
    }
    .hero-lead {
      font-size: 1.3rem;
      color: #ccddee;
      margin-bottom: 2rem;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00E5FF, #00B8D4);
      border: none;
      color: #0B1A2F;
      font-weight: 700;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-glow);
      transition: all 0.25s ease;
      font-size: 1rem;
      letter-spacing: 0.5px;
      display: inline-block;
    }
    .btn-primary:hover {
      filter: brightness(1.15);
      transform: scale(1.04);
      box-shadow: 0 0 28px rgba(0,229,255,0.7);
      color: #0B1A2F;
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--cyan);
      color: var(--cyan);
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-secondary:hover {
      background: rgba(0,229,255,0.12);
      color: #fff;
    }
    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-top: 2.5rem;
      flex-wrap: wrap;
    }
    .badge-item {
      text-align: center;
      color: #B0C7DB;
    }
    .badge-number {
      font-size: 2rem;
      font-weight: 700;
      color: #fff;
    }

    @media (max-width: 640px) {
      h1 {
        font-size: 2.3rem;
      }
    }

    /* 卡片玻璃拟态 */
    .glass-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, box-shadow 0.3s;
      padding: 1.8rem;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0,229,255,0.12);
      border-color: rgba(0,229,255,0.2);
    }

    /* 功能交错布局 */
    .tool-row {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      margin-bottom: 3rem;
    }
    .tool-row.reverse {
      flex-direction: row-reverse;
    }
    .tool-text {
      flex: 1;
    }
    .tool-img {
      flex: 1;
      background: rgba(255,255,255,0.03);
      border-radius: 16px;
      overflow: hidden;
    }

    /* 数字动画简单样式 */
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--cyan);
      text-shadow: 0 0 12px rgba(0,229,255,0.4);
    }

    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .accordion-title {
      background: rgba(255,255,255,0.03);
      padding: 1rem 1.5rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-content {
      padding: 1rem 1.5rem;
      background: rgba(255,255,255,0.02);
      color: #AABBC9;
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }

    footer {
      background: #060F1A;
      color: #8899AA;
      padding: 3rem 1.5rem 1.5rem;
    }