/* roulang page: index */
/* 设计变量与重置 */
    :root {
      --primary-orange: #F04E30;
      --primary-deep: #D43D20;
      --accent-gold: #F5B642;
      --accent-green: #00A86B;
      --ink-black: #1A1D22;
      --bg-warm: #F7F5F2;
      --card-white: #FFFFFF;
      --text-main: #1D1F24;
      --text-secondary: #6B7280;
      --text-muted: #9CA3AF;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 2px 16px rgba(240,78,48,0.06), 0 0 0 1px rgba(0,0,0,0.03);
      --shadow-hover: 0 8px 30px rgba(240,78,48,0.12), 0 0 0 1px rgba(240,78,48,0.1);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --transition-base: 200ms ease;
      --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-base);
    }

    button, input, textarea {
      font-family: inherit;
      border: none;
      outline: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      transition: background var(--transition-base), box-shadow var(--transition-base);
      padding: 16px 0;
      backdrop-filter: blur(12px);
      background: transparent;
      border-bottom: 1px solid transparent;
    }

    .header.scrolled {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(20px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
      border-bottom: 1px solid rgba(0,0,0,0.04);
    }

    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: white;
      letter-spacing: 0.5px;
      transition: color var(--transition-base);
      white-space: nowrap;
    }
    .header.scrolled .logo {
      color: var(--ink-black);
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-orange);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 800;
      font-size: 20px;
      box-shadow: 0 4px 10px rgba(240,78,48,0.3);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 16px;
      color: rgba(255,255,255,0.9);
      transition: color var(--transition-base);
      position: relative;
      white-space: nowrap;
    }
    .header.scrolled .nav-links a {
      color: var(--text-main);
    }

    .nav-links a:hover {
      color: var(--accent-gold);
    }
    .header.scrolled .nav-links a:hover {
      color: var(--primary-orange);
    }

    .btn-primary-nav {
      background: var(--primary-orange);
      color: white !important;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(240,78,48,0.4);
      transition: background var(--transition-base), transform var(--transition-base);
      margin-left: 8px;
    }
    .btn-primary-nav:hover {
      background: var(--primary-deep);
      transform: translateY(-1px);
      color: white !important;
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      color: white;
      font-size: 28px;
      cursor: pointer;
    }
    .header.scrolled .mobile-menu-btn {
      color: var(--ink-black);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(26,29,34,0.95);
      backdrop-filter: blur(20px);
      padding: 8px 16px;
      justify-content: space-around;
      align-items: center;
      z-index: 99;
      border-top: 1px solid rgba(255,255,255,0.1);
      border-radius: 24px 24px 0 0;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .mobile-bottom-nav {
        display: flex;
      }
      .header {
        padding: 12px 0;
      }
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      background: linear-gradient(135deg, #1A1D22 0%, #2A2D35 100%);
      position: relative;
      overflow: hidden;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }

    .hero-bg-image {
      position: absolute;
      right: 0;
      top: 0;
      width: 55%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.7) 0%, transparent 95%);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.7) 0%, transparent 95%);
    }

    .hero .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: relative;
      z-index: 2;
      gap: 60px;
    }

    .hero-text {
      flex: 1 1 50%;
      color: white;
    }

    .hero h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero h1 span {
      color: var(--primary-orange);
    }

    .hero-sub {
      font-size: 18px;
      color: rgba(255,255,255,0.7);
      margin-bottom: 40px;
      line-height: 1.6;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-hero-primary {
      background: var(--primary-orange);
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 700;
      font-size: 17px;
      transition: all var(--transition-base);
      box-shadow: 0 8px 20px rgba(240,78,48,0.4);
    }
    .btn-hero-primary:hover {
      background: var(--primary-deep);
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      background: transparent;
      border: 1.5px solid rgba(255,255,255,0.5);
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 17px;
      transition: all var(--transition-base);
    }
    .btn-hero-secondary:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
      background: rgba(255,255,255,0.05);
    }

    .hero-stats {
      flex: 1 1 45%;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .stat-card {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 24px;
      border: 1px solid rgba(255,255,255,0.1);
      display: flex;
      justify-content: space-between;
    }

    .stat-item {
      text-align: center;
      color: white;
    }
    .stat-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--accent-gold);
    }

    @media (max-width: 1024px) {
      .hero .container {
        flex-direction: column;
        text-align: center;
      }
      .hero-stats {
        flex-direction: row;
        width: 100%;
      }
    }

    /* 通用标题 */
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--ink-black);
    }
    .section-desc {
      color: var(--text-secondary);
      max-width: 700px;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .dash-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-base);
    }
    .dash-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .dash-number {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary-orange);
      line-height: 1.2;
    }

    /* 服务矩阵 2x3 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      transition: all var(--transition-base);
      box-shadow: var(--shadow-card);
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 38px;
      color: var(--primary-orange);
      margin-bottom: 20px;
    }

    /* 对比 */
    .compare-wrapper {
      display: flex;
      gap: 40px;
      margin-top: 40px;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 32px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      padding: 20px;
      cursor: pointer;
    }

    /* CTA */
    .cta-section {
      background: var(--primary-orange);
      color: white;
    }
    .cta-form input {
      background: white;
      padding: 14px;
      border-radius: 30px;
      width: 100%;
    }

    @media (max-width: 768px) {
      .dashboard-grid, .services-grid, .faq-grid {
        grid-template-columns: 1fr;
      }
      .compare-wrapper {
        flex-direction: column;
      }
    }