/* roulang page: index */
:root {
      --brand-start: #F97316;
      --brand-end: #EC4899;
      --brand-gradient: linear-gradient(135deg, #F97316 0%, #EC4899 100%);
      --primary-text: #1E293B;
      --secondary-text: #64748B;
      --warm-white: #FFFBF5;
      --light-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --accent-amber: #F59E0B;
      --border-light: rgba(249, 115, 22, 0.12);
      --shadow-card: 0 4px 20px rgba(249, 115, 22, 0.06);
      --shadow-hover: 0 12px 28px rgba(249, 115, 22, 0.12);
      --radius-xl: 20px;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --transition-smooth: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1280px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--warm-white);
      color: var(--primary-text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(255, 251, 245, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(249, 115, 22, 0.08);
      transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      padding: 12px 24px;
      max-width: var(--container-max);
      margin: 0 auto;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.5px;
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .logo-icon {
      height: 40px;
      width: auto;
      border-radius: 10px;
      background: var(--brand-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 800;
      font-size: 1.2rem;
      padding: 0 12px;
      -webkit-text-fill-color: white;
      background-clip: border-box;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      font-weight: 500;
      color: var(--primary-text);
      flex-wrap: wrap;
    }
    .nav-links a {
      color: #334155;
      transition: color 0.2s;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #F97316;
    }
    .trend-tag {
      background: rgba(249, 115, 22, 0.1);
      color: #C2410C;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-left: 8px;
    }
    .search-icon {
      background: none;
      border: none;
      font-size: 1.3rem;
      color: #334155;
      cursor: pointer;
      margin-left: 4px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-text);
    }
    /* Hero */
    .hero {
      padding: 140px 0 80px;
      background: linear-gradient(180deg, #FFFBF5 0%, #F8FAFC 100%);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 400px;
    }
    .hero-text h1 {
      font-size: clamp(2.5rem, 5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(to right, #1E293B 20%, #B45309);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: #475569;
      margin: 20px 0 28px;
    }
    .badge-inline {
      background: #FEF3C7;
      color: #92400E;
      font-weight: 600;
      padding: 2px 12px;
      border-radius: 20px;
      margin-left: 8px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--brand-gradient);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all var(--transition-smooth);
      box-shadow: 0 8px 16px rgba(249, 115, 22, 0.25);
      display: inline-block;
    }
    .btn-primary:hover {
      transform: scale(1.02);
      box-shadow: 0 12px 24px rgba(249, 115, 22, 0.35);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid transparent;
      background-image: linear-gradient(white, white), var(--brand-gradient);
      background-origin: border-box;
      background-clip: padding-box, border-box;
      color: #C2410C;
      padding: 14px 32px;
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background-image: linear-gradient(rgba(249,115,22,0.05), rgba(249,115,22,0.05)), var(--brand-gradient);
    }
    .hero-image {
      flex: 1 1 400px;
    }
    .hero-card-img {
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-card);
      width: 100%;
      object-fit: cover;
      background: #fff;
    }
    .stats-row {
      display: flex;
      gap: 32px;
      margin-top: 40px;
    }
    .stat-item {
      background: white;
      border-radius: var(--radius-lg);
      padding: 12px 20px;
      box-shadow: var(--shadow-card);
    }
    .stat-number {
      font-weight: 700;
      font-size: 1.8rem;
      color: #C2410C;
    }
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .grid-3, .grid-4 {
      display: grid;
      gap: 24px;
    }
    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }
    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-xl);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      background: rgba(249,115,22,0.1);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: #F97316;
    }
    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 64px;
    }
    .scenario-img {
      flex: 1;
    }
    .scenario-content {
      flex: 1;
    }
    /* 案例卡片 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 8px;
    }
    .case-card {
      min-width: 280px;
      background: white;
      border-radius: var(--radius-xl);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }
    .amber-badge {
      background: #FEF3C7;
      color: #92400E;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin: 8px 0;
    }
    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: white;
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border: 2px solid transparent;
    }
    .price-card.featured {
      border-image: var(--brand-gradient) 1;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-hover);
    }
    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      padding: 20px 24px;
      cursor: pointer;
      transition: 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    .cta-banner {
      background: var(--brand-gradient);
      border-radius: var(--radius-xl);
      padding: 60px;
      text-align: center;
      color: white;
    }
    footer {
      background: #1E293B;
      color: #CBD5E1;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2,1fr); }
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .pricing-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-grid { flex-direction: column; }
      .scenario-row { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }