/* roulang page: index */
:root {
      --primary-or: #FF6B35;
      --deep-green: #1A2F2B;
      --accent-cyan: #00E5A0;
      --bg-warm: #F9F7F4;
      --text-main: #1A1A1A;
      --text-secondary: #5C6B7A;
      --white: #FFFFFF;
      --border-light: rgba(26,47,43,0.08);
      --shadow-card: 0 2px 12px rgba(26,47,43,0.06);
      --shadow-hover: 0 8px 24px rgba(26,47,43,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --transition-smooth: 0.25s ease;
      --font-mono: 'DIN Alternate', 'Roboto Mono', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: #FFFFFF;
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .nav {
      position: sticky;
      top: 0;
      background: var(--white);
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      height: 64px;
      display: flex;
      align-items: center;
      z-index: 50;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-weight: 700;
      font-size: 24px;
      letter-spacing: -0.5px;
      display: flex;
      align-items: baseline;
    }
    .logo-part1 {
      color: var(--primary-or);
    }
    .logo-part2 {
      color: var(--deep-green);
    }
    .nav-links {
      display: flex;
      gap: 28px;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--deep-green);
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
      border-radius: 2px;
    }
    .nav-links a:hover {
      color: var(--primary-or);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .burger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .burger span {
      width: 24px;
      height: 2px;
      background: var(--deep-green);
      border-radius: 2px;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--deep-green);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      z-index: 100;
    }
    .mobile-menu a {
      color: white;
      font-size: 22px;
      font-weight: 600;
      text-decoration: none;
      transition: color 0.2s;
    }
    .mobile-menu a:hover {
      color: var(--accent-cyan);
    }
    .close-burger {
      position: absolute;
      top: 24px;
      right: 24px;
      color: white;
      font-size: 36px;
      cursor: pointer;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--primary-or);
      color: white;
      border: none;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: background 0.25s, transform 0.2s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary:hover {
      background: #E55A2B;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary-or);
      border: 2px solid var(--primary-or);
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: 0.25s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--primary-or);
      color: white;
    }
    .btn-cta {
      background: var(--accent-cyan);
      color: var(--deep-green);
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      text-decoration: none;
    }
    .btn-cta:hover {
      background: #33F0B3;
      transform: translateY(-2px);
    }

    /* 区块通用 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
      .btn-primary, .btn-outline, .btn-cta {
        padding: 10px 20px;
      }
    hir:
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1A2F2B 0%, #0F1F1C 100%);
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(255,107,53,0.2) 0%, transparent 70%);
      top: -100px;
      right: -100px;
      border-radius: 50%;
      filter: blur(50px);
    }
    .hero .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      position: relative;
      z-index: 2;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
      color: white;
    }
    .hero .subtitle {
      font-size: 18px;
      color: #cbd5d0;
      max-width: 480px;
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .score-card-mock {
      flex: 0 0 320px;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      border-radius: 16px;
      padding: 20px;
      border: 1px solid rgba(255,255,255,0.15);
      display: flex;
      flex-direction: column;
      gap: 16px;
      font-family: var(--font-mono);
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-cyan);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
  }
    @keyframes pulse {
      0% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.5); opacity: 0.7; }
      100% { transform: scale(1); opacity: 1; }
    }
    .score-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #ddd;
    }
    .score-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    /* 功能卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-warm);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: all 0.25s ease;
      box-shadow: var(--shadow-card);
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon {
      font-size: 36px;
      color: var(--primary-or);
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-weight: 600;
      font-size: 20px;
      margin-bottom: 8px;
    }
    .feature-card p {
      color: var(--text-secondary);
      font-size: 15px;
    }

    /* 场景图文 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 50px;
      margin-bottom: 64px;
    }
    .scenario-img {
      flex: 1;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }
    .scenario-img img {
      width: 100%;
      display: block;
    }
    .scenario-text {
      flex: 1;
    }

    /* 案例数据 */
    .case-stats {
      background: var(--deep-green);
      color: white;
      border-radius: 24px;
      padding: 60px 40px;
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
    }
    .stat-item {
      font-family: var(--font-mono);
    }
    .stat-number {
      font-size: 42px;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    /* 价格卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: 0.2s;
    }
    .pricing-card.featured {
      border: 2px solid var(--accent-cyan);
      transform: scale(1.03);
    }
    .price-number {
      font-size: 40px;
      font-family: var(--font-mono);
      color: var(--primary-or);
      font-weight: 700;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #e0e0e0;
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }

    /* 页脚 */
    .footer {
      background: var(--deep-green);
      color: #b0c4bc;
      padding: 60px 0 30px;
    }
    .footer a {
      color: #b0c4bc;
      text-decoration: none;
    }
    .footer a:hover { color: var(--accent-cyan); }

    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2,1fr); }
      .pricing-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .burger { display: flex; }
      .hero .container { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr; }
      .scenario-row { flex-direction: column; }
    }