/* roulang page: index */
:root {
      --primary-green: #0EAD69;
      --primary-green-hover: #0B9B58;
      --primary-green-light: #E6F9F1;
      --accent-red: #D62839;
      --accent-red-light: #E84050;
      --bg-warm: #F7F5F0;
      --bg-dark: #1A2E24;
      --white: #FFFFFF;
      --text-dark: #1A2E24;
      --text-body: #334437;
      --text-muted: #6F7A72;
      --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.08);
      --radius-card: 20px;
      --radius-small: 14px;
      --radius-btn: 10px;
      --transition: all 0.2s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }
    body {
      font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3 {
      font-family: 'Noto Sans SC', sans-serif;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
    }
    h1 { font-size: clamp(2.5rem, 6vw, 3rem); }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.25rem; }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    section {
      padding: 80px 0;
    }
    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      transition: background 0.3s ease, box-shadow 0.3s ease;
      background: transparent;
      padding: 16px 0;
    }
    #nav.scrolled {
      background: var(--white);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
      padding: 12px 0;
    }
    #nav .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--white);
      text-decoration: none;
      transition: color 0.3s;
    }
    #nav.scrolled .logo {
      color: var(--text-dark);
    }
    .logo span {
      color: var(--primary-green);
    }
    .nav-links {
      display: flex;
      gap: 2rem;
    }
    .nav-links a {
      color: var(--white);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s;
    }
    #nav.scrolled .nav-links a {
      color: var(--text-dark);
    }
    .nav-links a:hover {
      color: var(--primary-green);
    }
    .nav-cta {
      background: var(--accent-red);
      color: white !important;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .nav-cta:hover {
      background: var(--accent-red-light) !important;
      color: white !important;
    }
    .mobile-nav {
      display: none;
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, #0EAD69 0%, #1A2E24 100%);
      position: relative;
      overflow: hidden;
      padding: 140px 0 100px;
      color: white;
    }
    #hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.05) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 1 1 55%;
    }
    .hero-left h1 {
      color: white;
      font-size: 3.25rem;
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      font-size: 1.25rem;
      opacity: 0.9;
      margin-bottom: 2.5rem;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-red);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: 0.2s;
      border: none;
      cursor: pointer;
      display: inline-block;
      font-size: 1rem;
    }
    .btn-primary:hover {
      background: var(--accent-red-light);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
    }
    .hero-right {
      flex: 1 1 45%;
      position: relative;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: flex-end;
    }
    .badge-float {
      background: var(--white);
      color: var(--text-dark);
      border-radius: var(--radius-small);
      padding: 12px 20px;
      box-shadow: var(--shadow-md);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      position: relative;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(4px);
    }
    .badge-float i {
      color: var(--accent-red);
    }

    /* 亮点网格 */
    #highlights .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .highlight-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      position: relative;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .highlight-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border: 1px solid var(--primary-green);
    }
    .data-badge {
      position: absolute;
      top: 20px;
      right: 20px;
      background: var(--accent-red);
      color: white;
      padding: 4px 16px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* 服务矩阵 */
    #services .service-grid {
      display: flex;
      gap: 32px;
    }
    .service-left {
      flex: 0 0 40%;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .service-left img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .service-left .pad {
      padding: 28px;
    }
    .service-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .service-item {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 20px 24px;
      display: flex;
      gap: 16px;
      align-items: center;
      box-shadow: var(--shadow-sm);
    }

    /* 数据看板深色区域 */
    #stats {
      background: var(--bg-dark);
      color: white;
      padding: 70px 0;
    }
    .stats-grid {
      display: flex;
      justify-content: space-between;
      text-align: center;
    }
    .stat-item {
      flex: 1;
    }
    .stat-number {
      font-family: 'Inter', monospace;
      font-size: 3rem;
      font-weight: 700;
      color: white;
    }

    /* 对比表 */
    #compare .compare-cols {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .plan-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      text-align: center;
      border: 2px solid transparent;
    }
    .plan-featured {
      border-color: var(--primary-green);
      position: relative;
    }
    .recommend-badge {
      position: absolute;
      top: -15px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent-red);
      color: white;
      padding: 4px 24px;
      border-radius: 20px;
      font-weight: bold;
    }

    /* 案例瀑布 */
    #cases .cases-grid {
      columns: 2;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    /* FAQ 双列 */
    #faq .faq-layout {
      display: flex;
      gap: 40px;
    }
    .faq-left {
      flex: 1;
    }
    .faq-right {
      flex: 1;
    }

    /* CTA */
    #cta {
      background: linear-gradient(135deg, #0EAD69, #D62839);
      text-align: center;
      padding: 90px 0;
      color: white;
    }

    /* 页脚 */
    #footer {
      background: var(--bg-dark);
      color: rgba(255,255,255,0.8);
      padding: 60px 0 30px;
    }

    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--primary-green);
        justify-content: space-around;
        padding: 10px 0;
        z-index: 999;
        border-radius: 24px 24px 0 0;
      }
      .hero-grid, .service-grid, .faq-layout { flex-direction: column; }
      .grid-3, .compare-cols { grid-template-columns: 1fr; }
      .cases-grid { columns: 1; }
    }