/* roulang page: index */
:root {
      --primary: #1A8C3E;
      --primary-soft: rgba(26, 140, 62, 0.08);
      --accent: #FF8C2E;
      --accent-hover: #E67A1E;
      --bg: #F9FBF8;
      --surface: #FFFFFF;
      --text-primary: #1E2B1C;
      --text-secondary: #5C6B5A;
      --text-on-dark: #A3B0A0;
      --border-light: #E6EFE4;
      --divider: #DCE8DA;
      --shadow-card: 0 4px 20px rgba(26, 140, 62, 0.06);
      --shadow-hover: 0 8px 30px rgba(26, 140, 62, 0.12);
      --radius-card: 16px;
      --radius-btn: 50px;
      --radius-sm: 12px;
      --transition: 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", system-ui, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
      font-weight: 600;
      font-size: 16px;
      white-space: nowrap;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航卡片化控制面板 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      border-bottom: 1px solid var(--border-light);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 32px;
      max-width: 1280px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      font-size: 28px;
      filter: drop-shadow(0 2px 4px rgba(26,140,62,0.2));
    }

    .nav-icons {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .nav-icon-item {
      width: 48px;
      height: 48px;
      background: #F1F7F0;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 22px;
      transition: var(--transition);
    }

    .nav-icon-item:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }

    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 12px rgba(255,140,46,0.25);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 6px 18px rgba(255,140,46,0.35);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
    }

    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
    }

    .btn-outline-green {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
    }

    .btn-outline-green:hover {
      background: rgba(26,140,62,0.05);
    }

    /* Hero */
    .hero {
      background: linear-gradient(0deg, rgba(26,140,62,0.75), rgba(26,140,62,0.7)), url('/assets/images/backpic/hero-bg.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      color: white;
      margin-top: 72px;
      position: relative;
    }

    .hero-content {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }

    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .hero p {
      font-size: 20px;
      margin-bottom: 36px;
      opacity: 0.9;
    }

    .hero-actions {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* 区块通用 */
    section {
      padding: 120px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-primary);
    }

    .section-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 48px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .card {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }

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

    .feature-icon {
      font-size: 36px;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .scenario-card img, .capability-img {
      border-radius: var(--radius-sm);
      width: 100%;
      height: auto;
      object-fit: cover;
      margin-bottom: 16px;
      transition: transform 0.3s ease;
    }

    .scenario-card:hover img {
      transform: scale(1.03);
    }

    .case-highlight {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent);
      font-family: var(--font-number);
    }

    .faq-item {
      background: var(--surface);
      border-radius: 8px;
      padding: 20px 24px;
      margin-bottom: 12px;
      cursor: pointer;
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }

    .faq-item.active {
      background: white;
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      color: var(--text-primary);
    }

    .faq-answer {
      margin-top: 12px;
      color: var(--text-secondary);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .pricing-recommend {
      border: 2px solid var(--primary);
      position: relative;
    }

    .badge {
      background: var(--accent);
      color: white;
      font-size: 14px;
      padding: 4px 16px;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }

    .cta-banner {
      background: var(--primary);
      color: white;
      text-align: center;
      padding: 80px 0;
    }

    .footer {
      background: #1E2B1C;
      color: var(--text-on-dark);
      padding: 60px 0 30px;
    }

    .footer a:hover {
      color: var(--accent);
    }

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
      .hero h1 { font-size: 36px; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-icons { overflow-x: auto; gap: 12px; }
      .grid-3 { grid-template-columns: 1fr; }
      section { padding: 80px 0; }
      .hero { min-height: 70vh; margin-top: 64px; }
      .hero h1 { font-size: 32px; }
      .btn { padding: 12px 24px; }
    }