/* roulang page: index */
:root {
      --primary: #0FA958;
      --primary-dark: #0B7A3E;
      --accent-red: #E53E3E;
      --dark: #1A1A1A;
      --gray-bg: #F8FAFB;
      --white: #FFFFFF;
      --border-light: #EDF2F7;
      --border-medium: #E2E8F0;
      --text-main: #1A1A1A;
      --text-secondary: #4A5568;
      --text-muted: #A0AEC0;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 28px rgba(15,169,88,0.12);
      --radius-card: 20px;
      --radius-btn: 12px;
      --radius-sm: 10px;
      --transition: 0.3s ease;
      --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    }

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

    body {
      font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--gray-bg);
      color: var(--text-main);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航系统 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 var(--border-light);
      transition: box-shadow 0.3s;
    }
    .main-header.scrolled {
      box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 52px;
      padding: 0 24px;
      max-width: 1280px;
      margin: 0 auto;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.4rem;
      letter-spacing: 0.5px;
      color: var(--dark);
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 50%;
      background-color: #e0f2e7;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .search-trend {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .trend-tags {
      display: flex;
      gap: 12px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-secondary);
    }
    .trend-tags span {
      background: #f0f9f4;
      padding: 4px 12px;
      border-radius: 20px;
      color: var(--primary-dark);
      cursor: default;
    }
    .search-icon {
      font-size: 1.2rem;
      color: var(--text-secondary);
      cursor: pointer;
    }
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 32px;
      height: 44px;
      border-top: 1px solid var(--border-light);
      font-weight: 500;
      font-size: 0.95rem;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      color: var(--text-secondary);
    }
    .nav-bar a {
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-bar a:hover {
      color: var(--primary);
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      cursor: pointer;
      color: var(--dark);
    }

    /* 板块间距 */
    section {
      padding: 90px 0;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0FA958 0%, #0B7A3E 100%);
      position: relative;
      overflow: hidden;
      padding: 70px 0 80px;
      color: white;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.08;
      mix-blend-mode: overlay;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-left h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 24px;
    }
    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(4px);
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 600;
      margin-bottom: 30px;
      font-size: 0.95rem;
    }
    .live-dot {
      width: 10px;
      height: 10px;
      background: var(--accent-red);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--accent-red);
    }
    .cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: white;
      color: var(--primary-dark);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      font-size: 1rem;
      cursor: pointer;
      transition: 0.2s;
      display: inline-block;
      box-shadow: 0 8px 18px rgba(0,0,0,0.1);
    }
    .btn-primary:hover {
      transform: scale(1.03);
      background: #f0fdf4;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
    }
    .hero-right {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(8px);
      border-radius: 28px;
      padding: 16px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.25);
    }
    .hero-right img {
      border-radius: 18px;
      width: 100%;
      object-fit: cover;
    }

    /* 通用标题 */
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--primary);
      border-radius: 4px;
    }
    .section-sub {
      color: var(--text-secondary);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* 服务卡片 不等高 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .icon-circle {
      width: 52px;
      height: 52px;
      background: #e6f7ec;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
    }
    .micro-data {
      margin-top: auto;
      display: flex;
      gap: 16px;
      padding-top: 20px;
      font-size: 0.9rem;
      color: var(--primary-dark);
      font-weight: 600;
    }

    /* 数据徽章条 */
    .data-strip {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      padding: 16px 0;
      scrollbar-width: thin;
    }
    .data-badge {
      background: var(--white);
      border-radius: 40px;
      padding: 18px 28px;
      display: flex;
      align-items: center;
      gap: 14px;
      white-space: nowrap;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
    }
    .data-number {
      font-size: 2rem;
      font-weight: 800;
      background: linear-gradient(135deg, #0FA958, #0B7A3E);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* 案例网格 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: white;
      border-radius: 16px;
      padding: 24px;
      display: flex;
      gap: 20px;
      align-items: center;
      border: 1px solid var(--border-medium);
      transition: 0.2s;
    }
    .case-card:hover {
      border-color: var(--primary);
    }
    .case-logo {
      width: 64px;
      height: 64px;
      background: #f0f4f8;
      border-radius: 16px;
      background-image: url('/assets/images/coverpic/cover-3.webp');
      background-size: cover;
    }

    /* 步骤线 */
    .steps-vertical {
      display: flex;
      flex-direction: column;
      gap: 32px;
      position: relative;
      padding-left: 40px;
    }
    .step-item {
      display: flex;
      gap: 24px;
      align-items: flex-start;
    }
    .step-dot {
      width: 24px;
      height: 24px;
      background: var(--primary);
      border-radius: 50%;
      margin-top: 8px;
      box-shadow: 0 0 0 4px rgba(15,169,88,0.2);
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .faq-item {
      background: white;
      border-radius: 16px;
      padding: 18px 24px;
      border: 1px solid var(--border-light);
      cursor: pointer;
    }
    .faq-q {
      display: flex;
      justify-content: space-between;
      font-weight: 700;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--dark);
      color: white;
      text-align: center;
      border-radius: 32px;
      padding: 64px 24px;
    }

    /* 页脚 */
    .footer {
      background: #1A1A1A;
      color: #CBD5E0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-bar { display: none; }
      .hamburger { display: block; }
      .trend-tags { display: none; }
      .services-grid, .cases-grid, .faq-grid, .footer-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.2rem; }
    }