/* roulang page: index */
:root {
      --primary-red: #E63946;
      --primary-red-hover: #C1121F;
      --secondary-navy: #1D3557;
      --accent-orange: #F4A261;
      --bg-light: #F8F9FA;
      --card-white: #FFFFFF;
      --text-dark: #1E1E2F;
      --text-muted: #6C757D;
      --border-light: #E9ECEF;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
      --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.16);
      --radius-md: 12px;
      --radius-btn: 8px;
      --radius-lg: 16px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --transition: all 0.3s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      font-weight: 600;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
      outline: none;
    }
    h1, h2, h3 {
      font-weight: 700;
      line-height: 1.3;
    }
    h1 {
      font-size: 42px;
    }
    h2 {
      font-size: 32px;
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 20px;
      font-weight: 600;
    }
    .section-title {
      text-align: center;
      margin-bottom: 2.5rem;
    }
    .section-title h2 {
      color: var(--secondary-navy);
    }
    .section-title p {
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }
    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(10px);
      transition: var(--transition);
      border-bottom: 1px solid transparent;
    }
    .main-header.scrolled {
      background: rgba(255,255,255,0.98);
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--secondary-navy);
    }
    .logo i {
      color: var(--primary-red);
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-red);
      transition: width 0.3s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .btn-nav {
      background: var(--primary-red);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(230,57,70,0.4);
    }
    .btn-nav:hover {
      background: var(--primary-red-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(230,57,70,0.5);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--secondary-navy);
    }
    /* 底部移动导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: white;
      box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
      z-index: 999;
      padding: 8px 16px;
      justify-content: space-around;
      align-items: center;
    }
    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 12px;
      color: var(--text-muted);
      gap: 4px;
    }
    .mobile-bottom-nav a i {
      font-size: 20px;
    }
    .mobile-bottom-nav .center-download {
      background: var(--primary-red);
      color: white;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: -20px;
      box-shadow: 0 6px 16px rgba(230,57,70,0.5);
      font-size: 22px;
    }
    /* Hero */
    .hero {
      height: 100vh;
      min-height: 700px;
      background: linear-gradient(135deg, rgba(29,53,87,0.85) 0%, rgba(29,53,87,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 3rem;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1;
      min-width: 280px;
    }
    .hero-text h1 {
      font-size: 3.2rem;
      margin-bottom: 1.2rem;
      color: white;
    }
    .hero-text .subtitle {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 2rem;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-red);
      color: white;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      box-shadow: 0 8px 20px rgba(230,57,70,0.5);
    }
    .btn-primary:hover {
      background: var(--primary-red-hover);
      transform: translateY(-3px);
      box-shadow: 0 12px 24px rgba(230,57,70,0.7);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
    }
    .btn-outline:hover {
      background: white;
      color: var(--secondary-navy);
    }
    .hero-mockup {
      flex: 0 0 320px;
      background: rgba(255,255,255,0.1);
      border-radius: 24px;
      padding: 12px;
      backdrop-filter: blur(8px);
    }
    .hero-mockup img {
      border-radius: 16px;
      width: 100%;
    }
    .scroll-down {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 2rem;
      animation: bounce 2s infinite;
      color: white;
    }
    @keyframes bounce {
      0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0);}
      40%{transform:translateX(-50%) translateY(-10px);}
      60%{transform:translateX(-50%) translateY(-5px);}
    }
    /* 实时数据看板 */
    .live-data {
      background: var(--secondary-navy);
      padding: 60px 0;
      color: white;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
      text-align: center;
    }
    .stat-item .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-orange);
      font-family: 'Inter', sans-serif;
    }
    .ticker-bar {
      margin-top: 2.5rem;
      background: rgba(255,255,255,0.1);
      padding: 12px 20px;
      border-radius: 30px;
      overflow: hidden;
      white-space: nowrap;
      color: #ddd;
    }
    /* 服务矩阵 2x2 */
    .services {
      padding: 80px 0;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 2rem;
    }
    .service-card {
      background: var(--card-white);
      padding: 2rem;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      gap: 1.5rem;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      font-size: 2.5rem;
      color: var(--primary-red);
      background: rgba(230,57,70,0.1);
      padding: 12px;
      border-radius: 12px;
    }
    /* 平台对比 */
    .comparison {
      padding: 80px 0;
      background: white;
    }
    .compare-wrapper {
      display: flex;
      gap: 3rem;
      flex-wrap: wrap;
    }
    .compare-table {
      flex: 1;
    }
    .compare-table table {
      width: 100%;
      border-collapse: collapse;
    }
    .compare-table th, .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-light);
      text-align: left;
    }
    .compare-table th {
      background: #f1f3f5;
    }
    .chart-visual {
      flex: 1;
      display: flex;
      align-items: flex-end;
      gap: 2rem;
      justify-content: center;
    }
    .bar {
      width: 60px;
      background: var(--primary-red);
      height: var(--h);
      border-radius: 8px 8px 0 0;
      transition: height 0.5s;
    }
    /* 下载指引 */
    .download-steps {
      padding: 80px 0;
      background: var(--bg-light);
    }
    .steps-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-align: center;
    }
    .step {
      flex: 1;
    }
    .step-icon {
      font-size: 2.5rem;
      background: white;
      width: 80px;
      height: 80px;
      line-height: 80px;
      border-radius: 50%;
      margin: 0 auto 1rem;
      box-shadow: var(--shadow-sm);
      color: var(--primary-red);
    }
    /* 评价滚动 */
    .testimonials {
      padding: 80px 0;
    }
    .carousel {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
    }
    .review-card {
      min-width: 300px;
      background: white;
      padding: 1.5rem;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }
    .reviewer {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 1rem;
    }
    .reviewer img {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      object-fit: cover;
    }
    /* FAQ */
    .faq {
      padding: 80px 0;
    }
    .accordion-item {
      background: white;
      margin-bottom: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }
    .accordion-header {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .accordion-body {
      padding: 0 24px 18px;
      display: none;
      color: var(--text-muted);
    }
    .accordion-item.active .accordion-body {
      display: block;
    }
    /* 最终CTA */
    .final-cta {
      background: var(--secondary-navy);
      padding: 80px 0;
      color: white;
      text-align: center;
    }
    .qr-placeholder {
      width: 120px;
      height: 120px;
      background: white;
      margin: 1rem auto;
      border-radius: 12px;
    }
    /* 页脚 */
    .footer {
      background: #10172A;
      color: #ccc;
      padding: 50px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
    }
    @media (max-width: 1024px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-mockup {
        flex: 0 0 auto;
        width: 260px;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .mobile-bottom-nav {
        display: flex;
      }
      .main-header {
        background: white;
      }
      h1 {
        font-size: 2.2rem;
      }
      .services-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .steps-row {
        flex-direction: column;
        gap: 2rem;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .compare-wrapper {
        flex-direction: column;
      }
    }
    @media (max-width: 520px) {
      .hero {
        min-height: 650px;
      }
    }