/* roulang page: index */
:root {
      --primary: #0A9E5A;
      --primary-dark: #078B4B;
      --primary-light: #06C06A;
      --secondary: #1E1E2A;
      --accent: #FF6B35;
      --accent-hover: #E85D2A;
      --bg-light: #F7F8FA;
      --bg-white: #FFFFFF;
      --bg-dark: #1E1E2A;
      --text-dark: #1E1E2A;
      --text-mid: #4A4A5A;
      --text-light: #B0B5BD;
      --text-white: #FFFFFF;
      --border-light: #DDE1E6;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-btn: 50px;
      --radius-input: 8px;
      --transition: 0.25s ease-in-out;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --font-number: "Inter", "SF Pro Display", system-ui, sans-serif;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-white);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }
    /* 导航 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(8px);
      z-index: 100;
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow 0.3s;
    }
    #header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--secondary);
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: bold;
      font-size: 20px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--text-mid);
      transition: color 0.2s;
      font-size: 0.95rem;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .btn-nav {
      background: var(--primary);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.2s;
    }
    .btn-nav:hover {
      background: var(--primary-dark);
      transform: scale(1.02);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--secondary);
    }
    /* 英雄区 */
    #hero {
      padding: 140px 0 100px;
      background: linear-gradient(135deg, #1E1E2A 0%, #2A2A3C 100%);
      position: relative;
      overflow: hidden;
      color: white;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1 1 500px;
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: #CCD0D5;
      margin-bottom: 32px;
      max-width: 550px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      border: none;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(10,158,90,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      transition: background 0.2s;
    }
    .btn-outline:hover {
      background: rgba(10,158,90,0.1);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1.1rem;
      border: none;
      box-shadow: 0 8px 24px rgba(255,107,53,0.3);
      animation: pulse 2s infinite;
      transition: background 0.2s;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,107,53,0.5); }
      70% { box-shadow: 0 0 0 12px rgba(255,107,53,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,107,53,0); }
    }
    .hero-visual {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }
    .data-badge-float {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      padding: 24px;
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .badge-item {
      text-align: center;
    }
    .badge-number {
      font-family: var(--font-number);
      font-size: 40px;
      font-weight: 800;
      color: var(--accent);
    }
    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .section-desc {
      color: var(--text-mid);
      text-align: center;
      max-width: 600px;
      margin: 0 auto 48px;
      font-size: 1.1rem;
    }
    /* 核心优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      text-align: center;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon {
      font-size: 40px;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .feature-card h3 {
      font-size: 22px;
      margin-bottom: 12px;
    }
    .badge-mini {
      background: var(--accent);
      color: white;
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.9rem;
      margin-top: 12px;
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.3s;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .service-text {
      padding: 24px;
    }
    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .scenario-row.reverse {
      flex-direction: row-reverse;
    }
    .scenario-img {
      flex: 1;
      border-radius: 24px;
      overflow: hidden;
      height: 300px;
    }
    .scenario-text {
      flex: 1;
    }
    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .case-number {
      font-family: var(--font-number);
      font-size: 42px;
      font-weight: 800;
      color: var(--accent);
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      background: #F7F8FA;
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      border-radius: 12px;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #e8f5e9;
    }
    .faq-answer {
      padding: 0 24px 20px;
      display: none;
      color: var(--text-mid);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA */
    #cta {
      background: linear-gradient(135deg, var(--primary) 0%, #06C06A 100%);
      color: white;
      text-align: center;
    }
    /* 页脚 */
    #footer {
      background: var(--secondary);
      color: var(--text-light);
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-links a {
      display: block;
      margin-bottom: 8px;
      color: #B0B5BD;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .copyright {
      border-top: 1px solid #3A3A4A;
      padding-top: 20px;
      text-align: center;
    }
    @media (max-width: 1024px) {
      .features-grid, .services-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      h1 { font-size: 40px; }
      .scenario-row {
        flex-direction: column;
      }
      .scenario-row.reverse {
        flex-direction: column;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      #header {
        height: 60px;
      }
      h1 { font-size: 36px; }
      .features-grid, .services-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      section {
        padding: 60px 0;
      }
    }
    .mobile-menu {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.9);
      color: white;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 24px;
      font-size: 1.5rem;
      z-index: 200;
      display: none;
    }
    .mobile-menu a {
      color: white;
    }