/* roulang page: index */
:root {
      --bg-deep: #0A0E17;
      --bg-footer: #05080D;
      --accent-red: #FF4655;
      --accent-red-hover: #E0313F;
      --accent-cyan: #00E5FF;
      --text-white: #FFFFFF;
      --text-gray: #7A8A9E;
      --text-dark: #5A6A7E;
      --card-bg-light: #F8F9FB;
      --card-bg-dark: rgba(255,255,255,0.03);
      --border-light: #E8ECF1;
      --border-red-glow: rgba(255,70,85,0.2);
      --border-cyan-glow: rgba(0,229,255,0.15);
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-mono: "Inter", "Roboto", sans-serif;
      --shadow-sm: 0 4px 24px rgba(0,0,0,0.08);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.15);
      --radius-lg: 12px;
      --radius-md: 8px;
      --radius-pill: 40px;
      --container-max: 1280px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-white);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.25;
    }
    h1 {
      font-size: 48px;
      letter-spacing: -1px;
      font-weight: 900;
    }
    h2 {
      font-size: 32px;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 20px;
      font-weight: 600;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 600;
      border: none;
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-md);
      padding: 14px 32px;
      font-size: 16px;
    }
    .btn-primary {
      background: var(--accent-red);
      color: white;
      box-shadow: none;
    }
    .btn-primary:hover {
      background: var(--accent-red-hover);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-red);
      color: var(--accent-red);
    }
    .btn-outline:hover {
      background: rgba(255,70,85,0.08);
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid white;
      color: white;
    }
    .btn-ghost:hover {
      background: white;
      color: var(--bg-deep);
    }
    /* 胶囊导航 */
    .capsule-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 90%;
      background: rgba(10,14,23,0.85);
      backdrop-filter: blur(16px);
      border-radius: var(--radius-pill);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .nav-logo {
      font-weight: 800;
      font-size: 20px;
      color: white;
      margin-right: 32px;
      white-space: nowrap;
    }
    .nav-logo span {
      color: var(--accent-red);
    }
    .nav-links {
      display: flex;
      gap: 24px;
      font-size: 14px;
      font-weight: 500;
    }
    .nav-links a {
      color: white;
      padding: 6px 16px;
      border-radius: 20px;
      transition: 0.2s;
    }
    .nav-links a.active, .nav-links a:hover {
      background: var(--accent-red);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      color: white;
      font-size: 24px;
      border: none;
    }
    /* Hero */
    .hero {
      padding: 160px 0 100px;
      background-color: var(--bg-deep);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      position: relative;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(10,14,23,0.75);
      backdrop-filter: blur(2px);
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .hero-left h1 {
      margin-bottom: 24px;
      color: white;
    }
    .hero-left .subtitle {
      font-size: 18px;
      color: var(--text-gray);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      margin-bottom: 32px;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 800;
      color: var(--accent-cyan);
      letter-spacing: -0.5px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-gray);
    }
    .hero-right {
      background: rgba(0,229,255,0.05);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-cyan-glow);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,70,85,0.15);
      color: var(--accent-red);
      font-weight: 700;
      font-size: 14px;
      padding: 4px 16px;
      border-radius: 20px;
      margin-bottom: 24px;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-red);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-red);
    }
    .data-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 20px;
      font-size: 18px;
    }
    .data-value {
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--accent-cyan);
    }
    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }
    .section-header h2 {
      color: white;
    }
    .section-header p {
      color: var(--text-gray);
      max-width: 600px;
      margin: 0 auto;
      font-size: 18px;
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .service-card {
      background: var(--card-bg-light);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--border-red-glow);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(0,229,255,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      color: var(--accent-cyan);
      font-size: 28px;
      transition: 0.3s;
    }
    .service-card:hover .service-icon {
      background: var(--accent-red);
      color: white;
    }
    .service-card h3 {
      margin-bottom: 12px;
      color: var(--bg-deep);
    }
    .service-card p {
      color: var(--text-dark);
      font-size: 15px;
    }
    /* 对比表 */
    .compare-section {
      background: var(--bg-deep);
    }
    .table-wrapper {
      overflow-x: auto;
      border-radius: var(--radius-lg);
    }
    table {
      width: 100%;
      border-collapse: collapse;
      background: rgba(255,255,255,0.02);
      color: white;
      min-width: 600px;
    }
    th {
      background: rgba(255,70,85,0.2);
      color: var(--accent-red);
      padding: 18px 24px;
      text-align: left;
      font-weight: 700;
    }
    td {
      padding: 16px 24px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .highlight-col {
      background: rgba(0,229,255,0.08);
      border-left: 3px solid var(--accent-cyan);
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 24px 0;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      background: transparent;
      border: none;
      color: white;
      width: 100%;
      text-align: left;
    }
    .faq-icon {
      font-size: 24px;
      transition: transform 0.3s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-gray);
      font-size: 16px;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 24px;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    /* CTA */
    .cta-section {
      background: var(--bg-deep);
    }
    .cta-card {
      background: #141B26;
      border-radius: 16px;
      border: 1px solid var(--border-red-glow);
      padding: 64px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
    }
    .cta-text h2 {
      margin-bottom: 8px;
    }
    .cta-form {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .cta-form input {
      background: #1F2937;
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: var(--radius-md);
      padding: 14px 20px;
      color: white;
      font-size: 16px;
      width: 260px;
      outline: none;
    }
    .cta-form input::placeholder {
      color: #7A8A9E;
    }
    /* 页脚 */
    .footer {
      background: var(--bg-footer);
      padding: 80px 0 30px;
      color: var(--text-gray);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 48px;
    }
    .footer-logo {
      font-size: 24px;
      font-weight: 800;
      color: white;
      margin-bottom: 16px;
    }
    .footer a {
      color: #7A8A9E;
      display: block;
      margin-bottom: 12px;
      transition: 0.2s;
    }
    .footer a:hover {
      color: var(--accent-red);
    }
    .copyright {
      text-align: center;
      font-size: 12px;
      color: #4A5A6E;
      border-top: 1px solid rgba(255,255,255,0.05);
      padding-top: 24px;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      h1 { font-size: 40px; }
      .hero .container { grid-template-columns: 1fr; gap: 48px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .capsule-nav { top: auto; bottom: 16px; width: 90%; padding: 8px 20px; }
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      h1 { font-size: 32px; }
      section { padding: 60px 0; }
      .services-grid { grid-template-columns: 1fr; }
      .hero { padding: 100px 0 80px; }
      .cta-card { flex-direction: column; text-align: center; }
      .cta-form { flex-direction: column; width: 100%; }
      .cta-form input { width: 100%; }
      .footer-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      .hero-stats { flex-direction: column; gap: 16px; }
      .data-row { flex-direction: column; }
    }
    .nav-links-mobile {
      display: none;
      position: fixed;
      bottom: 80px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(10,14,23,0.95);
      backdrop-filter: blur(20px);
      border-radius: 32px;
      padding: 16px 32px;
      gap: 16px;
      z-index: 999;
      flex-wrap: wrap;
      justify-content: center;
    }
    .nav-links-mobile.show {
      display: flex;
    }
    .nav-links-mobile a {
      color: white;
      background: rgba(255,255,255,0.1);
      padding: 8px 20px;
      border-radius: 24px;
    }