/* roulang page: index */
:root {
      --deep-ocean: #0A3D62;
      --ocean-mid: #1E5A7A;
      --ocean-light: #3C8DAD;
      --warm-gold: #D4A574;
      --gold-light: #E8CCAF;
      --bg-page: #F7F9FC;
      --bg-card: #FFFFFF;
      --bg-light-ocean: #EDF4F7;
      --text-primary: #1E2B3C;
      --text-secondary: #4A5B6B;
      --text-muted: #7B8C9D;
      --text-on-dark: #B0C7D5;
      --border-light: #E9EDF2;
      --border-input: #DCE3EA;
      --shadow-card: 0 4px 20px rgba(10, 61, 98, 0.06);
      --shadow-hover: 0 12px 28px rgba(10, 61, 98, 0.12);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-pill: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "SF Pro Display", sans-serif;
      --transition: 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 90px;
    }

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

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      background: none;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .nav-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-weight: 700;
      font-size: 24px;
      color: var(--deep-ocean);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 0.5px;
    }

    .logo i {
      font-size: 28px;
      color: var(--warm-gold);
      filter: drop-shadow(0 2px 4px rgba(212, 165, 116, 0.4));
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: #2C3E50;
      position: relative;
      padding: 8px 0;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      height: 3px;
      width: 100%;
      background: var(--warm-gold);
      border-radius: 4px;
      transition: transform var(--transition);
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--deep-ocean);
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      transform: translateX(-50%) scaleX(1);
    }

    .btn-platform {
      background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-light));
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 4px 10px rgba(10, 61, 98, 0.25);
    }

    .btn-platform:hover {
      transform: scale(1.03);
      box-shadow: 0 6px 16px rgba(10, 61, 98, 0.35);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      width: 32px;
      height: 24px;
      justify-content: center;
    }

    .hamburger span {
      display: block;
      height: 2.5px;
      background: var(--deep-ocean);
      border-radius: 2px;
      transition: var(--transition);
    }

    .mobile-panel {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(10, 61, 98, 0.97);
      backdrop-filter: blur(16px);
      padding: 32px 24px;
      flex-direction: column;
      gap: 24px;
      z-index: 99;
    }

    .mobile-panel a {
      color: white;
      font-size: 18px;
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .btn-platform.desktop-only { display: none; }
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      section { padding: 60px 0; }
    }

    .section-title {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--deep-ocean);
    }

    .section-desc {
      color: var(--text-secondary);
      max-width: 680px;
      margin-bottom: 48px;
    }

    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(180deg, #F7F9FC 0%, #EDF4F7 100%);
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 48px;
    }

    .hero-text {
      flex: 1;
    }

    .hero-text h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--deep-ocean);
      margin-bottom: 20px;
    }

    .hero-text .subtitle {
      font-size: 20px;
      color: var(--text-secondary);
      margin-bottom: 28px;
    }

    .badge-row {
      display: flex;
      gap: 16px;
      margin-bottom: 32px;
      flex-wrap: wrap;
    }

    .stat-badge {
      background: #E8F0F4;
      border-radius: var(--radius-sm);
      padding: 10px 18px;
      font-weight: 600;
      color: var(--deep-ocean);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .stat-badge .number {
      color: var(--warm-gold);
      font-weight: 700;
    }

    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-light));
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      box-shadow: 0 8px 18px rgba(10, 61, 98, 0.2);
    }

    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(10, 61, 98, 0.3);
    }

    .btn-outline {
      border: 2px solid var(--warm-gold);
      color: var(--warm-gold);
      background: transparent;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 600;
    }

    .btn-outline:hover {
      background: rgba(212, 165, 116, 0.1);
    }

    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
    }

    .dashboard-mock {
      background: rgba(255,255,255,0.7);
      backdrop-filter: blur(8px);
      border-radius: 24px;
      padding: 24px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      gap: 16px;
      width: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-blend-mode: overlay;
    }

    .mock-card {
      background: rgba(255,255,255,0.85);
      border-radius: 12px;
      padding: 16px;
      backdrop-filter: blur(4px);
    }

    @media (max-width: 768px) {
      .hero-grid { flex-direction: column; }
      .hero-text h1 { font-size: 32px; }
    }

    /* 指标卡片 */
    .metrics {
      background: linear-gradient(180deg, #EDF4F7 0%, #FFFFFF 100%);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .metric-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      text-align: center;
    }

    .metric-number {
      font-size: 48px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-light));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 8px;
    }

    @media (max-width: 768px) {
      .metrics-grid { grid-template-columns: 1fr; }
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
    }

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

    .service-icon {
      width: 64px;
      height: 64px;
      background: #E8F0F4;
      border-radius: 12px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .service-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .service-link {
      color: var(--warm-gold);
      font-weight: 600;
      margin-top: 16px;
      display: inline-block;
    }

    @media (max-width: 768px) {
      .services-grid { grid-template-columns: 1fr; }
    }

    /* 对比 */
    .comparison-row {
      display: flex;
      gap: 24px;
      align-items: center;
    }

    .compare-card {
      flex: 1;
      border-radius: var(--radius-md);
      padding: 32px;
      background: #F1F3F5;
    }

    .compare-card.highlight {
      background: #E8F4F8;
      border-left: 4px solid var(--warm-gold);
    }

    .vs-badge {
      background: white;
      border-radius: 50%;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      box-shadow: var(--shadow-card);
      color: var(--deep-ocean);
    }

    @media (max-width: 768px) {
      .comparison-row { flex-direction: column; }
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .faq-item {
      background: white;
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-card);
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
    }

    @media (max-width: 768px) {
      .faq-grid { grid-template-columns: 1fr; }
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-mid));
      color: white;
      text-align: center;
    }

    .trust-badges {
      display: flex;
      justify-content: center;
      gap: 32px;
      margin-top: 32px;
    }

    .footer {
      background: #0A3D62;
      color: #B0C7D5;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }