/* roulang page: index */
:root {
      --primary: #0A66FF;
      --primary-glow: rgba(10,102,255,0.6);
      --accent: #FF5C00;
      --accent-glow: rgba(255,92,0,0.5);
      --bg-deep: #0B0E14;
      --bg-card: #111620;
      --bg-glass: rgba(255,255,255,0.03);
      --border-glass: rgba(255,255,255,0.08);
      --text-main: #FFFFFF;
      --text-secondary: #B0B8C5;
      --text-weak: #6B7280;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-glow: 0 0 20px var(--primary-glow);
      --font-stack: "PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
      --container-max: 1280px;
      --nav-height: 64px;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--nav-height);
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: rgba(11,14,20,0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--container-max);
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 700;
      font-size: 1.25rem;
      letter-spacing: 0.5px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: linear-gradient(135deg, var(--primary), #00C6FF);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--text-main);
    }

    .nav-cta {
      background: var(--primary);
      color: white;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      text-decoration: none;
      font-size: 0.9rem;
      transition: all 0.25s;
      box-shadow: 0 0 0px transparent;
    }

    .nav-cta:hover {
      box-shadow: var(--shadow-glow);
      transform: scale(1.03);
    }

    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(11,14,20,0.95);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-top: 1px solid rgba(255,255,255,0.08);
      z-index: 1000;
      padding: 6px 12px;
      justify-content: space-around;
      align-items: center;
    }

    .mobile-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      color: var(--text-weak);
      text-decoration: none;
      font-size: 0.7rem;
      font-weight: 500;
      transition: color 0.2s;
    }

    .mobile-nav-item i {
      font-size: 1.3rem;
    }

    .mobile-nav-item.active {
      color: var(--primary);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding-top: var(--nav-height);
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,14,20,0.85) 0%, rgba(11,14,20,0.7) 100%);
      z-index: 1;
    }

    .hero-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 40px 24px;
      position: relative;
      z-index: 2;
      gap: 48px;
    }

    .hero-left {
      flex: 1;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
      background: linear-gradient(to right, #FFFFFF, #E0E7FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 36px;
      max-width: 540px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      text-decoration: none;
      transition: all 0.25s;
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      box-shadow: 0 4px 14px rgba(10,102,255,0.3);
    }

    .btn-primary:hover {
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: white;
    }

    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }

    .hero-cards {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 16px;
      position: relative;
    }

    .glass-card {
      background: var(--bg-glass);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--shadow-card);
    }

    .hero-card-1 {
      transform: translateX(20px);
    }
    .hero-card-2 {
      transform: translateX(-10px);
      margin-left: 30px;
    }
    .hero-card-3 {
      transform: translateX(25px);
      margin-left: 10px;
    }

    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255,92,0,0.15);
      color: var(--accent);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 区块通用 */
    section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
    }

    .section-sub {
      text-align: center;
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 1.1rem;
    }

    /* 指标看板 */
    .stats-scroll {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      padding: 10px 0 20px;
      scrollbar-width: thin;
      scrollbar-color: var(--primary) transparent;
    }

    .stats-scroll::-webkit-scrollbar {
      height: 4px;
    }
    .stats-scroll::-webkit-scrollbar-thumb {
      background: var(--primary);
      border-radius: 10px;
    }

    .stat-card {
      min-width: 200px;
      background: var(--bg-glass);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      text-align: center;
      flex-shrink: 0;
    }

    .stat-number {
      font-size: 2.4rem;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      color: var(--text-main);
    }

    .stat-label {
      color: var(--text-weak);
      font-size: 0.9rem;
      margin-top: 6px;
    }

    .trend-up { color: #10B981; }
    .trend-down { color: #EF4444; }

    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-glass);
      backdrop-filter: blur(20px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: all 0.3s;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-6px);
      border-color: var(--primary);
      box-shadow: 0 12px 40px rgba(10,102,255,0.2);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(10,102,255,0.1);
      border-radius: var(--radius-md);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
    }

    .service-card h3 {
      font-size: 1.3rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .service-card p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-bottom: 16px;
    }

    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag {
      background: rgba(255,255,255,0.06);
      color: var(--text-secondary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* 对比表 */
    .compare-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .compare-col {
      background: var(--bg-glass);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      text-align: center;
      position: relative;
      transition: all 0.3s;
    }

    .compare-col.recommended {
      border-color: var(--primary);
      box-shadow: 0 0 30px rgba(10,102,255,0.25);
      transform: scale(1.03);
    }

    .recommend-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: white;
      padding: 6px 18px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
    }

    .compare-col h3 {
      font-size: 1.4rem;
      margin: 10px 0;
    }

    .price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin: 16px 0;
    }

    .feature-list {
      list-style: none;
      text-align: left;
      margin: 20px 0;
    }

    .feature-list li {
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
    }

    .check { color: var(--accent); font-weight: bold; }
    .cross { color: var(--text-weak); }

    /* FAQ */
    .faq-wrapper {
      display: flex;
      gap: 40px;
    }

    .faq-questions {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .faq-item {
      padding: 14px 20px;
      background: rgba(255,255,255,0.02);
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-weight: 500;
      transition: all 0.2s;
      border-left: 3px solid transparent;
    }

    .faq-item.active {
      border-left-color: var(--accent);
      background: rgba(255,92,0,0.08);
    }

    .faq-answer-panel {
      flex: 1.5;
      background: var(--bg-glass);
      backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 32px;
      min-height: 200px;
    }

    /* 联系表单 */
    .contact-row {
      display: flex;
      gap: 48px;
      align-items: center;
    }

    .contact-left {
      flex: 1;
    }

    .trust-badges {
      display: flex;
      gap: 20px;
      margin-top: 20px;
    }

    .badge {
      display: flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,0.04);
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
    }

    .contact-form {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .input-field {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      color: white;
      font-size: 1rem;
      outline: none;
      transition: border 0.2s;
    }

    .input-field:focus {
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(10,102,255,0.3);
    }

    .btn-accent {
      background: var(--accent);
      color: white;
      box-shadow: 0 4px 14px rgba(255,92,0,0.3);
      width: 100%;
    }

    .btn-accent:hover {
      box-shadow: 0 0 24px var(--accent-glow);
    }

    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer-col h4 {
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col a, .footer-col p {
      color: var(--text-weak);
      text-decoration: none;
      font-size: 0.9rem;
      display: block;
      margin-bottom: 8px;
      transition: color 0.2s;
    }

    .footer-col a:hover {
      color: var(--text-main);
    }

    .copyright {
      border-top: 1px solid rgba(255,255,255,0.06);
      margin-top: 48px;
      padding-top: 24px;
      text-align: center;
      color: var(--text-weak);
      font-size: 0.85rem;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 2.4rem; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .compare-grid { grid-template-columns: 1fr; }
      .compare-col.recommended { transform: none; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-nav { display: flex; }
      .hero-container { flex-direction: column; text-align: center; }
      .hero h1 { font-size: 2rem; }
      .hero-cards { flex-direction: row; overflow-x: auto; width: 100%; }
      .services-grid { grid-template-columns: 1fr; }
      .faq-wrapper { flex-direction: column; }
      .contact-row { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 520px) {
      .hero-buttons { flex-direction: column; align-items: center; }
      .footer-grid { grid-template-columns: 1fr; }
    }