/* roulang page: index */
:root {
      --primary: #0A3D2E;
      --primary-light: #0F5C42;
      --accent: #E85D04;
      --accent-soft: #F28C38;
      --bg-page: #F9FAFB;
      --card-white: #FFFFFF;
      --dark-bg: #0A1A14;
      --text-main: #111827;
      --text-secondary: #4B5563;
      --text-on-dark: #F9FAFB;
      --border-light: #E5E7EB;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-hover: 0 10px 25px rgba(0,0,0,0.1);
      --space-section: 80px;
      --container-max: 1200px;
      --nav-height-desktop: 72px;
      --nav-height-mobile: 56px;
      --bottom-tab-height: 56px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航 */
    .top-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height-desktop);
      background: rgba(10,26,20,0.95);
      backdrop-filter: blur(12px);
      z-index: 50;
      display: flex;
      align-items: center;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: white;
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: white;
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.2s;
    }
    .nav-links a:hover {
      color: var(--accent-soft);
    }
    .nav-links a.active::after,
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 24px;
      cursor: pointer;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      right: 0;
      width: 280px;
      height: 100vh;
      background: var(--dark-bg);
      z-index: 55;
      padding: 24px;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      display: block;
      color: white;
      padding: 12px 0;
      font-size: 18px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .bottom-tab {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: var(--bottom-tab-height);
      background: #FFFFFF;
      border-top: 1px solid var(--border-light);
      z-index: 45;
      justify-content: space-around;
      align-items: center;
      box-shadow: 0 -2px 8px rgba(0,0,0,0.04);
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-secondary);
      font-size: 10px;
      gap: 4px;
      transition: color 0.2s;
    }
    .tab-item i {
      font-size: 20px;
    }
    .tab-item.active {
      color: var(--accent);
    }
    /* Hero */
    .hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 20% 30%, #0F5C42 0%, #0A1A14 90%);
      position: relative;
      overflow: hidden;
      margin-top: 0;
      padding-top: var(--nav-height-desktop);
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      color: white;
    }
    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero .subtitle {
      font-size: 20px;
      opacity: 0.9;
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.2s;
      display: inline-block;
      font-size: 16px;
    }
    .btn-primary:hover {
      background: #D14B00;
      transform: scale(1.03);
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-light);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.2s;
      display: inline-block;
      font-size: 16px;
    }
    .btn-outline:hover {
      background: rgba(15,92,66,0.2);
      color: white;
    }
    .live-indicators {
      display: flex;
      gap: 32px;
      margin-top: 48px;
      flex-wrap: wrap;
    }
    .indicator {
      text-align: center;
      border-left: 1px solid rgba(255,255,255,0.2);
      padding-left: 24px;
      min-width: 100px;
    }
    .indicator:first-child { border-left: none; padding-left: 0; }
    .indicator .big-num {
      font-size: 36px;
      font-weight: 700;
      color: var(--accent);
    }
    .indicator .label {
      font-size: 14px;
      opacity: 0.8;
    }
    /* 通用区块 */
    section {
      padding: var(--space-section) 0;
    }
    .section-title {
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 600px;
    }
    /* 实时看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 20px;
    }
    .stat-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent);
      transition: 0.25s ease;
    }
    .stat-card:hover {
      border-left-width: 8px;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
    }
    .stat-label {
      color: var(--text-secondary);
      margin-top: 8px;
    }
    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--primary-light);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-card i {
      font-size: 40px;
      color: var(--primary);
      transition: 0.2s;
    }
    .service-card:hover i {
      color: var(--accent);
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
    }
    .service-card p {
      color: var(--text-secondary);
    }
    /* 对比区 */
    .compare-row {
      display: flex;
      gap: 32px;
      align-items: stretch;
    }
    .compare-col {
      flex: 1;
      border-radius: var(--radius-card);
      padding: 32px;
      position: relative;
    }
    .left-compare {
      background: #F3F4F6;
    }
    .right-compare {
      background: rgba(10,61,46,0.05);
      border: 1px solid rgba(10,61,46,0.2);
    }
    .badge-recommend {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--accent);
      color: white;
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 13px;
      font-weight: 600;
    }
    .compare-list {
      list-style: none;
      margin-top: 20px;
    }
    .compare-list li {
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    .accordion-title {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .accordion-content.open {
      max-height: 200px;
      padding-top: 12px;
    }
    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, #0A3D2E 0%, #0A1A14 100%);
      padding: 60px 0;
    }
    .cta-form {
      display: flex;
      gap: 0;
      max-width: 500px;
    }
    .cta-form input {
      flex:1;
      padding: 14px;
      border-radius: 8px 0 0 8px;
      border: none;
    }
    .cta-form button {
      border-radius: 0 8px 8px 0;
      background: var(--accent);
      color: white;
      border: none;
      padding: 14px 24px;
      font-weight: 600;
    }
    /* 页脚 */
    .footer {
      background: #0A1A14;
      color: #D1D5DB;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 32px;
    }
    .footer-col h4 {
      color: white;
      margin-bottom: 16px;
    }
    .footer-col a {
      display: block;
      margin-bottom: 8px;
      color: #D1D5DB;
    }
    .copyright {
      border-top: 1px solid #1F2937;
      margin-top: 32px;
      padding-top: 16px;
      font-size: 14px;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .top-nav .nav-links { display: none; }
      .hamburger { display: block; }
      .bottom-tab { display: flex; }
      .hero { min-height: 70vh; padding-top: var(--nav-height-mobile); }
      .hero h1 { font-size: 32px; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .compare-row { flex-direction: column; }
      .cta-form { flex-direction: column; }
      .cta-form input, .cta-form button { border-radius: 8px; width: 100%; }
      .footer-grid { grid-template-columns: 1fr; }
      .live-indicators { gap: 16px; }
      .indicator { padding-left: 16px; }
    }