/* roulang page: index */
:root {
      --primary: #7B2FF7;
      --primary-glow: rgba(123, 47, 247, 0.7);
      --accent: #00F0FF;
      --accent-glow: rgba(0, 240, 255, 0.5);
      --bg-deep: #0A0E17;
      --surface: rgba(18, 22, 33, 0.85);
      --surface-border: rgba(123, 47, 247, 0.25);
      --text-primary: #FFFFFF;
      --text-secondary: #B0B8C5;
      --text-muted: #5A6275;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.6), inset 0 0 20px rgba(123, 47, 247, 0.15);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-deep);
    }
    body {
      font-family: var(--font-sans);
      background: var(--bg-deep);
      color: var(--text-secondary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    button, input, textarea {
      font-family: inherit;
      outline: none;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 背景纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      background-image: 
        linear-gradient(rgba(123, 47, 247, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(123, 47, 247, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      z-index: 0;
    }
    /* 导航 PC */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(10, 14, 23, 0.9);
      backdrop-filter: blur(24px);
      border-bottom: 1px solid rgba(123, 47, 247, 0.3);
      z-index: 100;
      display: flex;
      align-items: center;
      transition: 0.2s;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: -0.02em;
      color: var(--text-primary);
      display: flex;
      align-items: baseline;
    }
    .logo .score {
      color: var(--accent);
      text-shadow: 0 0 12px var(--accent-glow);
      margin-right: 4px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover {
      color: var(--accent);
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
      box-shadow: 0 0 10px var(--accent);
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      box-shadow: 0 0 18px var(--primary-glow);
      cursor: pointer;
      transition: 0.25s ease;
      display: inline-block;
    }
    .btn-primary:hover {
      background: #8A3FFF;
      box-shadow: 0 0 30px var(--primary-glow);
      transform: translateY(-1px);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid var(--accent);
      color: var(--accent);
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      cursor: pointer;
      transition: 0.25s;
    }
    .btn-ghost:hover {
      background: rgba(0, 240, 255, 0.1);
      box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
    }
    .btn-cta {
      background: var(--accent);
      color: var(--bg-deep);
      font-weight: 700;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: 0.25s;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
    }
    .btn-cta:hover {
      background: #E0FEFF;
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
    }
    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 12px;
      left: 16px;
      right: 16px;
      height: 64px;
      background: rgba(18, 22, 33, 0.95);
      backdrop-filter: blur(24px);
      border-radius: 20px;
      z-index: 110;
      justify-content: space-around;
      align-items: center;
      box-shadow: 0 8px 24px rgba(0,0,0,0.8);
      border: 1px solid rgba(123,47,247,0.3);
    }
    .mobile-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-secondary);
      font-size: 0.7rem;
      padding: 6px 12px;
      border-radius: 20px;
      transition: 0.2s;
    }
    .mobile-nav a.active {
      background: var(--primary);
      color: white;
    }
    /* 板块通用 */
    section {
      position: relative;
      z-index: 2;
      padding: 80px 0;
    }
    .section-title {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 48px;
    }
    .section-title h2 {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.02em;
    }
    .accent-line {
      width: 4px;
      height: 32px;
      background: var(--accent);
      box-shadow: 0 0 12px var(--accent);
      border-radius: 2px;
    }
    .glass-card {
      background: var(--surface);
      backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      padding: 28px;
      transition: 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(123,47,247,0.5);
      box-shadow: 0 12px 36px rgba(0,0,0,0.8), inset 0 0 24px rgba(123,47,247,0.2);
      transform: translateY(-4px);
    }
    /* 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;
      margin-top: 0;
      padding-top: 100px;
    }
    .hero::after {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(123,47,247,0.25), transparent 70%);
    }
    .hero-content {
      position: relative;
      z-index: 3;
      max-width: 800px;
    }
    .hero h1 {
      font-size: clamp(2.8rem, 6vw, 4rem);
      font-weight: 800;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero h1 span {
      color: var(--accent);
      text-shadow: 0 0 20px var(--accent);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 36px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .live-preview {
      background: rgba(18,22,33,0.8);
      backdrop-filter: blur(16px);
      border-radius: 16px;
      padding: 20px;
      margin-top: 40px;
      display: flex;
      gap: 24px;
      border: 1px solid var(--surface-border);
    }
    .live-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      color: var(--accent);
      font-weight: 700;
    }
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .metric-cards {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .metric {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .metric-value {
      font-family: var(--font-mono);
      font-size: 2rem;
      color: var(--accent);
    }
    .mini-chart {
      height: 120px;
      background: rgba(0,240,255,0.05);
      border-radius: 12px;
      display: flex;
      align-items: flex-end;
      gap: 6px;
      padding: 12px;
    }
    .bar {
      width: 20%;
      background: var(--primary);
      height: 60%;
      border-radius: 4px 4px 0 0;
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-icon {
      font-size: 2rem;
      margin-bottom: 12px;
    }
    .flow-steps {
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 16px 0;
    }
    .step {
      background: rgba(123,47,247,0.2);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
    }
    /* 洞察 */
    .insights-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
    }
    .compare-table td {
      padding: 12px 8px;
      border-bottom: 1px solid rgba(123,47,247,0.2);
    }
    .highlight {
      color: var(--accent);
      font-weight: 700;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(123,47,247,0.2);
      padding: 16px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      color: white;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--text-secondary);
    }
    .faq-item.open .faq-answer {
      max-height: 150px;
      padding-top: 12px;
    }
    /* 表单 */
    .contact-form {
      max-width: 600px;
      margin: 0 auto;
    }
    .form-group input, .form-group textarea {
      width: 100%;
      background: rgba(10,14,23,0.8);
      border: 1px solid rgba(123,47,247,0.4);
      border-radius: 8px;
      padding: 14px;
      color: white;
      margin-bottom: 20px;
    }
    .form-group input:focus, .form-group textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 14px var(--accent-glow);
    }
    footer {
      background: #060a10;
      border-top: 1px solid rgba(123,47,247,0.4);
      padding: 48px 0 24px;
    }
    @media (max-width: 768px) {
      .navbar { display: none; }
      .mobile-nav { display: flex; }
      .dashboard-grid, .insights-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.5rem; }
      section { padding: 60px 0; }
    }
    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .btn-primary, .btn-ghost { width: 100%; text-align: center; }
    }