/* roulang page: index */
:root {
      --primary-orange: #F15A24;
      --primary-deep: #D94A1A;
      --secondary-green: #1A3B32;
      --accent-gold: #D4AF37;
      --bg-light: #F8F9FA;
      --bg-white: #FFFFFF;
      --text-dark: #212529;
      --text-muted: #6C757D;
      --text-body: #495057;
      --border-light: #DEE2E6;
      --shadow-sm: 0 10px 30px -10px rgba(26, 59, 50, 0.08);
      --shadow-hover: 0 20px 40px -10px rgba(26, 59, 50, 0.15);
      --radius-card: 16px;
      --radius-btn: 50px;
      --transition: 0.3s ease;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

    a, button, input {
      font-family: inherit;
    }

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

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航 */
    .nav-bar {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      height: 72px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(0,0,0,0.04);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--secondary-green);
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: radial-gradient(circle at 40% 40%, #FF8C42, var(--primary-orange));
      border-radius: 50%;
      box-shadow: 0 0 12px rgba(241, 90, 36, 0.4);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-body);
      font-weight: 600;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
      transition: color var(--transition);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-orange);
      transition: width var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary-orange);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--secondary-green);
      cursor: pointer;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      display: inline-block;
      text-decoration: none;
      cursor: pointer;
      transition: background var(--transition), box-shadow var(--transition);
      box-shadow: 0 4px 12px rgba(241, 90, 36, 0.3);
      border: 2px solid transparent;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--primary-deep);
      box-shadow: 0 8px 20px rgba(241, 90, 36, 0.5);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary-orange);
      border: 2px solid var(--primary-orange);
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      display: inline-block;
      text-decoration: none;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary-orange);
      color: white;
    }

    /* 首屏 */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      color: white;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(26,59,50,0.85) 0%, rgba(26,59,50,0.45) 70%);
    }
    .hero-content {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 40px;
      width: 100%;
    }
    .hero-text {
      flex: 1 1 50%;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: white;
    }
    .hero .subtitle {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.85);
      margin-bottom: 2rem;
      max-width: 500px;
    }
    .hero-stats {
      flex: 1 1 40%;
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      background: rgba(0,0,0,0.35);
      backdrop-filter: blur(10px);
      border-radius: 24px;
      padding: 30px;
    }
    .stat-item {
      flex: 1 1 45%;
      text-align: center;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-gold);
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 0.9rem;
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--secondary-green);
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      position: relative;
    }
    .section-title::before {
      content: '';
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--primary-orange);
      transform: rotate(45deg);
      margin-right: 12px;
      vertical-align: middle;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .dash-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }
    .dash-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .dash-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-gold);
      font-feature-settings: "tnum";
    }
    .dash-label {
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* 非对称服务矩阵 */
    .service-matrix {
      display: flex;
      gap: 30px;
      align-items: flex-start;
    }
    .service-main {
      flex: 1.2;
      background: var(--bg-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
      position: relative;
    }
    .service-main:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-main img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .service-content {
      padding: 28px;
    }
    .service-side {
      flex: 0.9;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .side-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 16px;
      align-items: center;
      transition: var(--transition);
    }
    .side-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .side-icon {
      font-size: 2rem;
      color: var(--primary-orange);
    }

    /* 对比滑块 */
    .comparison-wrapper {
      display: flex;
      gap: 24px;
      align-items: center;
    }
    .compare-card {
      flex: 1;
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .compare-left {
      border-left: 6px solid #ADB5BD;
    }
    .compare-right {
      border-left: 6px solid var(--primary-orange);
      background: #FFF9F5;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
      cursor: pointer;
    }
    .faq-question {
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--secondary-green);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 16px;
    }

    /* 底部CTA */
    .cta-section {
      background: var(--secondary-green);
      color: white;
      padding: 70px 0;
    }
    .cta-grid {
      display: flex;
      gap: 40px;
      align-items: center;
    }
    .cta-form {
      flex: 1;
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(10px);
      border-radius: 24px;
      padding: 32px;
    }
    .input-line {
      background: transparent;
      border: none;
      border-bottom: 2px solid rgba(255,255,255,0.5);
      padding: 12px 0;
      width: 100%;
      margin-bottom: 24px;
      color: white;
      font-size: 1rem;
    }
    .input-line:focus {
      outline: none;
      border-bottom-color: var(--primary-orange);
    }

    footer {
      background: #0F2A24;
      color: rgba(255,255,255,0.7);
      padding: 48px 0 24px;
    }
    .footer-links a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      margin-right: 24px;
    }

    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .service-matrix { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .hero h1 { font-size: 2.4rem; }
      .hero-content { flex-direction: column; }
      .faq-grid { grid-template-columns: 1fr; }
      .cta-grid { flex-direction: column; }
      .comparison-wrapper { flex-direction: column; }
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: white;
      flex-direction: column;
      padding: 24px;
      gap: 20px;
      box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a { color: var(--secondary-green); font-weight: 600; }