/* roulang page: index */
:root {
      --primary: #1E3A2F;
      --primary-light: #2A4F3A;
      --accent: #F85C2B;
      --accent-hover: #E04A1F;
      --bg: #F9FAF8;
      --card-bg: #FFFFFF;
      --text: #333333;
      --text-light: #666666;
      --text-muted: #999999;
      --border: #E0E0E0;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --font-number: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      --max-width: 1280px;
      --header-height: 56px;
      --header-height-mobile: 48px;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--header-height);
    }

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

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.25s ease;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.05);
      z-index: 1000;
      display: flex;
      align-items: center;
      padding: 0 24px;
    }

    .header-inner {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.3px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: var(--accent);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 16px;
      font-weight: 700;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      position: relative;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after,
    .nav-links a:active::after {
      width: 100%;
    }

    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      white-space: nowrap;
      box-shadow: 0 2px 8px rgba(248,92,43,0.2);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
      box-shadow: 0 6px 16px rgba(248,92,43,0.3);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .hamburger span {
      width: 22px;
      height: 2px;
      background: var(--primary);
      transition: 0.25s ease;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: var(--header-height-mobile);
      left: 0;
      width: 100%;
      background: rgba(30, 58, 47, 0.96);
      backdrop-filter: blur(12px);
      flex-direction: column;
      padding: 24px;
      gap: 18px;
      z-index: 999;
      border-radius: 0 0 16px 16px;
    }

    .mobile-menu a {
      color: white;
      font-size: 18px;
      font-weight: 600;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .site-header {
        height: var(--header-height-mobile);
      }
    }

    /* Hero 分屏 */
    .hero {
      display: flex;
      min-height: 100vh;
      padding-top: var(--header-height);
      background: var(--bg);
    }

    .hero-left {
      width: 45%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 60px 48px 60px 48px;
      background: white;
    }

    .hero-right {
      width: 55%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
    }

    .hero-right::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to right, rgba(30,58,47,0.7) 0%, rgba(42,79,58,0.3) 100%);
    }

    .hero-title {
      font-size: clamp(36px, 5vw, 48px);
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 480px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }

    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
    }

    .btn-secondary:hover {
      background: rgba(30,58,47,0.08);
    }

    .trust-badges {
      display: flex;
      gap: 24px;
      font-size: 14px;
      color: var(--text-muted);
    }

    @media (max-width: 768px) {
      .hero {
        flex-direction: column;
      }
      .hero-left, .hero-right {
        width: 100%;
      }
      .hero-left {
        padding: 40px 20px;
      }
      .hero-right {
        height: 280px;
      }
    }

    /* 通用区块 */
    .section {
      padding: 90px 0;
    }

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

    .section-title {
      font-size: 30px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 48px;
      height: 4px;
      background: var(--accent);
      border-radius: 2px;
    }

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

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      text-align: left;
    }

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

    .icon-accent {
      width: 56px;
      height: 56px;
      background: rgba(248,92,43,0.1);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 28px;
      margin-bottom: 18px;
      transition: transform 0.2s;
    }

    .card:hover .icon-accent {
      transform: scale(1.1);
    }

    .card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    @media (max-width: 768px) {
      .grid-3 {
        grid-template-columns: 1fr;
      }
    }

    /* 场景交替 */
    .scene-row {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-bottom: 60px;
    }

    .scene-row.reverse {
      flex-direction: row-reverse;
    }

    .scene-text {
      flex: 1;
    }

    .scene-image {
      flex: 1;
      border-radius: 16px;
      overflow: hidden;
    }

    .scene-image img {
      width: 100%;
      height: auto;
      border-radius: 16px;
    }

    .tag {
      display: inline-block;
      background: rgba(248,92,43,0.1);
      color: var(--accent);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
    }

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

    /* 案例数据 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #F0F4F1;
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .big-number {
      font-family: var(--font-number);
      font-size: 36px;
      font-weight: 700;
      color: var(--accent);
    }

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

    /* 价格卡 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      text-align: left;
      transition: 0.25s;
      border: 1px solid transparent;
    }

    .price-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
    }

    .price {
      font-family: var(--font-number);
      font-size: 40px;
      font-weight: 700;
      color: var(--primary);
    }

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

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

    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 20px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: white;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #F9FAF8;
      padding: 0 20px;
    }

    .faq-answer.open {
      max-height: 200px;
      padding: 16px 20px;
    }

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

    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: white;
      text-align: center;
      padding: 80px 0;
      border-radius: 24px;
      margin: 40px 24px;
    }

    .btn-ghost {
      border: 1.5px solid white;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: transparent;
    }

    .btn-ghost:hover {
      background: white;
      color: var(--primary);
    }

    /* Footer */
    .site-footer {
      background: var(--primary);
      color: #CCCCCC;
      padding: 60px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
    }

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