/* roulang page: index */
:root {
      --primary: #C45A3C;
      --primary-soft: rgba(196,90,60,0.08);
      --secondary: #F2E6D8;
      --accent: #5F8B6F;
      --accent-dark: #4A6E58;
      --text-main: #2E2E2E;
      --text-muted: #6B6B6B;
      --border-light: #D9CFC3;
      --white: #FFFFFF;
      --off-white: #FDFAF7;
      --footer-bg: #2E2E2E;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--secondary);
      color: var(--text-main);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--text-main);
    }
    h1 {
      font-size: clamp(2.4rem, 8vw, 3.5rem);
      line-height: 1.2;
      letter-spacing: -0.02em;
      font-weight: 700;
    }
    h2 {
      font-size: clamp(1.8rem, 6vw, 2.4rem);
      line-height: 1.3;
      margin-bottom: 1.5rem;
      position: relative;
    }
    h3 {
      font-size: 1.5rem;
      line-height: 1.4;
    }
    h4 {
      font-size: 1.2rem;
      line-height: 1.5;
    }
    p {
      font-size: 1rem;
      line-height: 1.9;
      color: var(--text-muted);
      max-width: 72ch;
      margin-bottom: 1.5rem;
    }
    .text-small {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    a {
      color: var(--accent);
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-dark);
    }
    .btn {
      display: inline-block;
      border-radius: var(--radius-btn);
      font-weight: 600;
      padding: 0.75rem 2rem;
      text-align: center;
      transition: all 0.25s ease;
      cursor: pointer;
      text-decoration: none;
      border: 2px solid transparent;
      background: transparent;
      font-size: 1rem;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      border-color: var(--accent);
    }
    .btn-primary:hover {
      background: var(--accent-dark);
      border-color: var(--accent-dark);
      box-shadow: var(--shadow-md);
      transform: scale(1.02);
      color: white;
    }
    .btn-secondary {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
    }
    .btn-secondary:hover {
      background: var(--primary-soft);
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-white-outline {
      border: 2px solid white;
      color: white;
      background: transparent;
    }
    .btn-white-outline:hover {
      background: rgba(255,255,255,0.15);
      color: white;
    }
    .pill {
      background: var(--secondary);
      border-radius: var(--radius-pill);
      padding: 0.4rem 1.2rem;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: all 0.2s;
      white-space: nowrap;
    }
    .pill.active, .pill:hover {
      background: var(--primary);
      color: white;
    }
    header {
      background: var(--white);
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 0;
      z-index: 40;
    }
    .nav-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 0;
    }
    .logo {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary);
      letter-spacing: -0.5px;
      text-decoration: none;
    }
    .logo span {
      color: var(--text-main);
      font-weight: 400;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1.2rem;
    }
    .search-icon {
      color: var(--text-muted);
      font-size: 1.2rem;
      cursor: pointer;
    }
    .nav-channels {
      display: flex;
      gap: 0.5rem;
      padding: 0.5rem 0 0.9rem;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .nav-channels::-webkit-scrollbar {
      display: none;
    }
    .hero {
      background: radial-gradient(circle at 20% 30%, rgba(196,90,60,0.08) 0%, var(--secondary) 70%);
      padding: 3rem 0 5rem;
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 2.5rem;
    }
    .hero-text {
      flex: 1;
    }
    .hero-image {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .hero-image img {
      width: 100%;
      height: auto;
      display: block;
    }
    .section {
      padding: 5rem 0;
    }
    .bg-white {
      background: var(--white);
    }
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      padding: 2rem;
      transition: all 0.25s;
      border: 1px solid var(--border-light);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .asymmetric-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.8rem;
    }
    .wide-card {
      grid-column: span 1;
    }
    .feature-icon {
      color: var(--accent);
      font-size: 2rem;
      margin-right: 1rem;
    }
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 4rem;
    }
    .scenario-row.reverse {
      flex-direction: row-reverse;
    }
    .scenario-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .scenario-text {
      flex: 1;
    }
    .cases-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
      scrollbar-width: thin;
    }
    .case-card {
      min-width: 280px;
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      flex-shrink: 0;
    }
    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 1.8rem;
    }
    .pricing-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid var(--border-light);
      text-align: center;
      transition: 0.2s;
    }
    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .badge {
      background: var(--accent);
      color: white;
      font-size: 0.8rem;
      padding: 0.2rem 1rem;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      white-space: nowrap;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 0.8rem;
    }
    .faq-question {
      background: var(--secondary);
      padding: 1rem 1.2rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-radius: 6px;
    }
    .faq-answer {
      padding: 0 1.2rem 1.2rem;
      display: none;
    }
    .faq-answer.open {
      display: block;
    }
    .cta-section {
      background: linear-gradient(15deg, rgba(196,90,60,0.9) 0%, rgba(95,139,111,0.9) 100%);
      color: white;
      border-radius: 0;
      padding: 4rem 0;
    }
    .cta-form input, .cta-form textarea {
      background: white;
      border: none;
      border-radius: 6px;
      padding: 0.7rem;
      width: 100%;
      margin-bottom: 0.8rem;
    }
    .footer {
      background: var(--footer-bg);
      color: #B0B0B0;
      padding: 3rem 0 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 2rem;
    }
    .footer a {
      color: #B0B0B0;
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--accent);
    }
    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
      }
      .asymmetric-grid {
        grid-template-columns: 1fr;
      }
      .scenario-row, .scenario-row.reverse {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-channels {
        gap: 0.3rem;
      }
      .section {
        padding: 3rem 0;
      }
    }