/* roulang page: index */
:root {
      --primary-midnight: #0A1929;
      --secondary-blue: #1E3A8A;
      --accent-amber: #F59E0B;
      --accent-amber-hover: #D97706;
      --bg-light: #F8FAFC;
      --card-white: #FFFFFF;
      --success-green: #10B981;
      --alert-red: #EF4444;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
      --radius-card: 16px;
      --radius-btn: 8px;
      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      --container-max: 1200px;
    }

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

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

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 2rem;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
    }

    h1, h2, h3 {
      color: var(--primary-midnight);
      line-height: 1.3;
    }

    h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    h2 {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--secondary-blue);
    }

    .text-accent {
      color: var(--accent-amber);
    }

    .bg-midnight {
      background-color: var(--primary-midnight);
    }

    /* 浮动导航 Dock */
    .floating-dock {
      position: sticky;
      top: 1.5rem;
      z-index: 50;
      display: flex;
      justify-content: center;
      width: 100%;
      pointer-events: none;
      margin-bottom: 2rem;
    }

    .dock-container {
      pointer-events: auto;
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 100px;
      padding: 0.75rem 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: auto;
      max-width: 950px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(0, 0, 0, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.5);
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--primary-midnight);
      letter-spacing: -0.5px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--secondary-blue);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .nav-links {
      display: flex;
      gap: 1.75rem;
      font-weight: 500;
      color: var(--text-body);
    }

    .nav-links a {
      padding: 0.4rem 0;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }

    .nav-links a:hover {
      color: var(--secondary-blue);
      border-bottom-color: var(--accent-amber);
    }

    .btn-cta {
      background: var(--accent-amber);
      color: var(--primary-midnight);
      font-weight: 700;
      padding: 0.7rem 2rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 10px rgba(245, 158, 11, 0.3);
    }

    .btn-cta:hover {
      background: var(--accent-amber-hover);
      transform: scale(1.03);
      box-shadow: 0 6px 15px rgba(217, 119, 6, 0.4);
    }

    .btn-outline {
      border: 2px solid var(--secondary-blue);
      color: var(--secondary-blue);
      padding: 0.7rem 2rem;
      border-radius: var(--radius-btn);
      background: transparent;
      font-weight: 600;
    }

    .btn-outline:hover {
      background: var(--secondary-blue);
      color: white;
    }

    /* 板块通用 */
    section {
      padding: 6rem 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 3.5rem;
    }

    .section-header h2 {
      position: relative;
      display: inline-block;
    }

    .section-header h2::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: var(--accent-amber);
      border-radius: 2px;
    }

    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }

    .hero-text p {
      font-size: 1.25rem;
      color: var(--text-body);
      margin: 1.5rem 0 2rem;
    }

    .hero-actions {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .live-panel {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
      border: 1px solid var(--border-light);
    }

    .live-stat {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }

    .live-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-midnight);
      font-feature-settings: "tnum";
    }

    .pulse-dot {
      width: 10px;
      height: 10px;
      background: var(--success-green);
      border-radius: 50%;
      display: inline-block;
      margin-right: 8px;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .stat-card {
      background: var(--card-white);
      padding: 1.8rem;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.25s;
    }

    .stat-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 0.5rem;
    }

    .stat-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary-midnight);
      font-feature-settings: "tnum";
    }

    .stat-trend {
      color: var(--success-green);
      font-weight: 600;
      margin-top: 0.5rem;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.25rem;
    }

    /* 服务矩阵 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .service-card {
      background: var(--card-white);
      padding: 2rem;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 1.25rem;
      transition: 0.2s;
      border: 1px solid transparent;
    }

    .service-card:hover {
      border-color: var(--accent-amber);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .service-icon {
      font-size: 2rem;
      color: var(--secondary-blue);
    }

    /* 对比组件 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      padding: 2.5rem;
    }

    .comp-col {
      padding: 1.5rem;
    }

    .comp-col h3 {
      margin-bottom: 1.5rem;
      font-size: 1.5rem;
    }

    .comp-list {
      list-style: none;
    }

    .comp-list li {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 1rem;
      font-weight: 500;
    }

    .bad-icon {
      color: var(--alert-red);
    }

    .good-icon {
      color: var(--accent-amber);
    }

    .divider {
      width: 1px;
      background: linear-gradient(to bottom, transparent, var(--border-light), transparent);
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 3rem;
      align-items: start;
    }

    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1.2rem 0;
    }

    .accordion-question {
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--primary-midnight);
    }

    .accordion-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: #475569;
    }

    .accordion-item.active .accordion-answer {
      max-height: 180px;
      padding-top: 0.8rem;
    }

    /* 转化表单 */
    .cta-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1fr;
      overflow: hidden;
    }

    .cta-left {
      background: var(--secondary-blue);
      color: white;
      padding: 3rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .cta-left h2 {
      color: white;
      font-size: 2rem;
    }

    .cta-right {
      padding: 3rem;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
      justify-content: center;
    }

    .input-field {
      width: 100%;
      padding: 0.9rem 1rem;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-btn);
      font-size: 1rem;
      transition: 0.2s;
    }

    .input-field:focus {
      outline: none;
      border-color: var(--secondary-blue);
      box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
    }

    .btn-submit {
      background: var(--accent-amber);
      color: var(--primary-midnight);
      font-weight: 700;
      padding: 0.9rem;
      border-radius: var(--radius-btn);
      width: 100%;
    }

    /* Footer */
    .site-footer {
      background: var(--primary-midnight);
      color: #94A3B8;
      text-align: center;
      padding: 2.5rem 0;
      font-size: 0.95rem;
    }

    .warning-text {
      margin-top: 0.75rem;
      font-weight: 500;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      h1 { font-size: 2.8rem; }
      .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .dock-container {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
        border-radius: 30px;
      }
      .nav-links { display: none; }
      .hero-grid { grid-template-columns: 1fr; }
      h1 { font-size: 2.5rem; }
      h2 { font-size: 1.8rem; }
      section { padding: 3rem 0; }
      .dashboard-grid { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .comparison-wrapper { grid-template-columns: 1fr; }
      .divider { display: none; }
      .faq-grid { grid-template-columns: 1fr; }
      .cta-card { grid-template-columns: 1fr; }
    }

    @media (max-width: 520px) {
      .dashboard-grid { grid-template-columns: 1fr; }
    }