/* roulang page: index */
:root {
      --green: #0A9E5A;
      --green-dark: #07804A;
      --accent: #F85C1E;
      --accent-dark: #E04A10;
      --dark: #1A1D23;
      --gray-bg: #F4F6F9;
      --white: #FFFFFF;
      --text-primary: #1E293B;
      --text-secondary: #64748B;
      --border-color: #E2E8F0;
      --success: #10B981;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-number: "Inter", "PingFang SC", "Helvetica Neue", sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.7;
      background-color: var(--white);
      color: var(--text-primary);
      overflow-x: hidden;
      scroll-behavior: smooth;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

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

    a, button {
      transition: all 0.25s ease;
      cursor: pointer;
      font-family: inherit;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      z-index: 999;
      background: transparent;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
    }

    .navbar.scrolled {
      background: var(--white);
      box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    }

    .logo {
      display: flex;
      align-items: center;
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 0.5px;
      color: var(--white);
      transition: color 0.3s;
      text-decoration: none;
    }
    .navbar.scrolled .logo {
      color: var(--text-primary);
    }
    .logo i {
      margin-right: 8px;
      color: var(--accent);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      text-decoration: none;
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      font-size: 0.98rem;
      position: relative;
      padding: 4px 0;
    }
    .navbar.scrolled .nav-links a {
      color: var(--text-primary);
    }
    .nav-links a:hover {
      color: var(--accent-dark);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--green);
      transition: width 0.25s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--white);
      font-size: 1.6rem;
      cursor: pointer;
    }
    .navbar.scrolled .menu-toggle {
      color: var(--dark);
    }

    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 64px;
        right: -100%;
        width: 70%;
        max-width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 32px 24px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.08);
        transition: right 0.35s;
        gap: 20px;
      }
      .nav-links a {
        color: var(--text-primary) !important;
      }
      .nav-links.open {
        right: 0;
      }
      .menu-toggle {
        display: block;
      }
    }

    /* 首屏 Hero */
    .hero {
      min-height: 100vh;
      background: radial-gradient(ellipse at 10% 30%, #1e2b26, var(--dark) 70%);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      padding-top: 64px;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.13;
      pointer-events: none;
    }
    .hero-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
      position: relative;
      z-index: 2;
      width: 100%;
      max-width: 1280px;
      padding: 40px 24px;
    }
    .hero-content {
      flex: 1 1 450px;
    }
    .hero-title {
      font-size: clamp(36px, 6vw, 56px);
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.15;
      color: var(--white);
      margin-bottom: 20px;
    }
    .highlight {
      color: var(--accent);
    }
    .hero-sub {
      font-size: 1.1rem;
      color: #CBD5E1;
      max-width: 480px;
      margin-bottom: 32px;
      line-height: 1.6;
    }
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      box-shadow: 0 4px 10px rgba(248,92,30,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(248,92,30,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--green);
      color: var(--green);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: rgba(10,158,90,0.12);
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      margin-top: 48px;
    }
    .badge {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(8px);
      border-radius: 24px;
      padding: 10px 18px;
      display: flex;
      align-items: center;
      gap: 10px;
      color: white;
      font-weight: 600;
    }
    .badge i { color: var(--accent); }
    .hero-visual {
      flex: 1 1 380px;
      display: flex;
      justify-content: center;
    }
    .hero-visual img {
      max-height: 420px;
      border-radius: var(--radius-card);
      box-shadow: 0 25px 50px rgba(0,0,0,0.5);
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 56px;
    }
    .section-header h2 {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .section-header p {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    /* 数据看板 */
    .data-dashboard {
      background: var(--dark);
      color: white;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .stat-card {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(10px);
      padding: 32px 20px;
      border-radius: var(--radius-card);
      text-align: center;
    }
    .stat-number {
      font-size: 2.7rem;
      font-weight: 800;
      font-family: var(--font-number);
      color: var(--accent);
    }
    .stat-label {
      color: #CBD5E1;
      margin-top: 6px;
    }

    /* 服务卡片 */
    .services-bg {
      background: var(--gray-bg);
    }
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--white);
      padding: 32px 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: all 0.2s;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      font-size: 2.4rem;
      color: var(--green);
      margin-bottom: 18px;
    }
    .service-card h3 {
      font-weight: 700;
      margin-bottom: 12px;
    }

    /* 对比区 */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .compare-col {
      padding: 36px;
      border-radius: var(--radius-card);
      background: #f8fafc;
    }
    .compare-col.highlight {
      border: 2px solid var(--green);
      background: #f0fdf4;
    }

    /* FAQ */
    .faq-accordion details {
      background: var(--white);
      border-radius: var(--radius-btn);
      margin-bottom: 14px;
      padding: 4px 20px;
      box-shadow: var(--shadow-card);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(120deg, var(--green), #063a20);
      color: white;
    }
    .form-inline {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    @media (max-width: 768px) {
      .cards-grid, .stats-grid { grid-template-columns: 1fr 1fr; }
      .compare-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      .cards-grid, .stats-grid { grid-template-columns: 1fr; }
    }
    .footer-dark {
      background: var(--dark);
      color: #bbb;
    }