/* roulang page: index */
:root {
      --red: #E63946;
      --red-deep: #C1121F;
      --charcoal: #1D1D1F;
      --gray-bg: #F2F2F4;
      --data-blue: #2A9D8F;
      --alert-yellow: #F4A261;
      --white: #FFFFFF;
      --border-light: #E5E5E7;
      --text-secondary: #666666;
      --text-muted: #999999;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-md: 12px;
      --radius-sm: 8px;
      --transition: 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: "Inter", "SF Pro Display", system-ui, sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--gray-bg);
      color: var(--charcoal);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.06);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--charcoal);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-dot {
      width: 10px;
      height: 10px;
      background: var(--red);
      border-radius: 2px;
      display: inline-block;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: #555;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--red);
      border-bottom-color: var(--red);
    }
    .btn-primary-sm {
      background: var(--red);
      color: white;
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      border: none;
      cursor: pointer;
      transition: background var(--transition);
      white-space: nowrap;
    }
    .btn-primary-sm:hover {
      background: var(--red-deep);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--charcoal);
      transition: var(--transition);
    }
    /* 区块通用 */
    section {
      padding: 80px 0;
    }
    h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .section-subtitle {
      color: var(--text-secondary);
      max-width: 640px;
      margin-bottom: 40px;
    }
    /* 首屏 */
    .hero {
      padding: 120px 0 80px;
      background-color: var(--gray-bg);
      background-image: radial-gradient(circle at 20% 30%, rgba(0,0,0,0.01) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero h1 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .text-highlight {
      color: var(--red);
      position: relative;
      display: inline-block;
    }
    .text-highlight::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--red);
      opacity: 0.3;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 480px;
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--red);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: background var(--transition);
    }
    .btn-primary:hover {
      background: var(--red-deep);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--red);
      color: var(--red);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--red);
      color: white;
    }
    .data-panel {
      background: var(--charcoal);
      border-radius: 16px;
      padding: 24px;
      color: white;
      transform: rotate(1deg);
      box-shadow: var(--shadow-md);
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .live-badge {
      background: var(--alert-yellow);
      color: #000;
      font-weight: 700;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      width: fit-content;
    }
    .match-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 8px;
    }
    .progress-bar {
      height: 4px;
      background: rgba(255,255,255,0.2);
      border-radius: 2px;
      width: 100%;
      margin: 4px 0;
    }
    .progress-fill {
      width: 74%;
      height: 100%;
      background: var(--red);
      border-radius: 2px;
    }
    /* 核心优势 非对称 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .adv-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: all var(--transition);
    }
    .adv-card:hover {
      border-color: var(--red);
      box-shadow: var(--shadow-md);
    }
    .adv-card.large {
      grid-row: span 2;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .icon-circle {
      width: 48px;
      height: 48px;
      background: rgba(42,157,143,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: var(--data-blue);
      font-size: 24px;
    }
    .big-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--red);
      line-height: 1.1;
    }
    /* 功能网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-item {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .feature-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon {
      font-size: 32px;
      color: var(--data-blue);
      margin-bottom: 12px;
    }
    /* 数据看板深色区 */
    .scenarios {
      background: var(--charcoal);
      color: var(--gray-bg);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-md);
      padding: 32px;
      text-align: center;
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--red);
    }
    /* 案例横向滚动 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .cases-scroll::-webkit-scrollbar {
      display: none;
    }
    .case-card {
      min-width: 300px;
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-light);
      text-align: center;
      transition: var(--transition);
    }
    .price-card.featured {
      border: 2px solid var(--red);
      position: relative;
    }
    .badge {
      background: var(--alert-yellow);
      color: #000;
      font-weight: 700;
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }
    .price-amount {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--charcoal);
    }
    /* FAQ */
    .faq-item {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 20px 20px;
      display: none;
      color: var(--text-secondary);
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    .faq-item.open {
      border-color: var(--red);
    }
    /* CTA */
    .cta-section {
      background: var(--charcoal);
      color: white;
    }
    .cta-form input, .cta-form textarea {
      width: 100%;
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      background: white;
      margin-bottom: 16px;
      transition: 0.2s;
    }
    .cta-form input:focus, .cta-form textarea:focus {
      outline: none;
      border-color: var(--red);
      box-shadow: 0 0 0 3px rgba(230,57,70,0.2);
    }
    /* 页脚 */
    .footer {
      background: #1A1A1C;
      color: var(--text-muted);
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 768px) {
      .hamburger {
        display: flex;
      }
      .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        display: none;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
      }
      .nav-menu.open {
        display: flex;
      }
      .hero-grid, .advantages-grid, .stats-grid, .pricing-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      h1 { font-size: 28px; }
      h2 { font-size: 22px; }
      .big-number, .stat-number, .price-amount { font-size: 32px; }
    }