/* roulang page: index */
:root {
      --primary-start: #0A8F3C;
      --primary-end: #06C15A;
      --primary-gradient: linear-gradient(135deg, #0A8F3C 0%, #06C15A 100%);
      --primary-gradient-reverse: linear-gradient(135deg, #06C15A 0%, #0A8F3C 100%);
      --accent-gold: #F5A623;
      --accent-gold-light: #FFC107;
      --accent-gradient: linear-gradient(135deg, #F5A623 0%, #FFC107 100%);
      --bg-page: #F9FBF9;
      --bg-dark: #0B1E14;
      --text-heading: #0B1E14;
      --text-body: #2C3E33;
      --text-muted: #6B7B6F;
      --card-bg: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --border-light: rgba(11, 30, 20, 0.08);
      --radius-card: 16px;
      --radius-btn: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", "Roboto", sans-serif;
      --spacing-section: 100px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: opacity 0.2s;
    }

    a:hover {
      opacity: 0.85;
    }

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

    button, input {
      font-family: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 22px;
      color: var(--text-heading);
      letter-spacing: -0.3px;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-gradient);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: white;
      font-weight: 700;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .nav-link {
      font-weight: 500;
      color: var(--text-body);
      font-size: 15px;
      position: relative;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-gradient);
      transition: width 0.2s ease;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      font-size: 15px;
    }

    .btn-primary:hover {
      background: var(--primary-gradient-reverse);
      transform: scale(1.02);
      box-shadow: 0 8px 18px rgba(6,193,90,0.3);
      opacity: 1;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-heading);
      border-radius: 4px;
      transition: all 0.3s;
    }

    .mobile-menu {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      width: 100%;
      background: white;
      border-bottom: 1px solid var(--border-light);
      padding: 16px 24px;
      flex-direction: column;
      gap: 16px;
      opacity: 0;
      transform: translateY(-8px);
      transition: all 0.25s ease;
    }

    .mobile-menu.open {
      display: flex;
      opacity: 1;
      transform: translateY(0);
    }

    /* Hero */
    .hero {
      padding: 140px 0 100px;
      background: linear-gradient(105deg, #F2F9F2 0%, #FFFFFF 60%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-heading);
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .hero-content p {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 480px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-start);
      color: var(--primary-start);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.3s ease;
      display: inline-block;
      text-align: center;
      cursor: pointer;
      font-size: 15px;
    }

    .btn-outline:hover {
      background: rgba(10,143,60,0.06);
    }

    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      min-height: 380px;
      box-shadow: var(--card-shadow);
      transform: rotate(0.5deg);
      border: 1px solid rgba(255,255,255,0.4);
    }

    /* 板块通用 */
    .section {
      padding: var(--spacing-section) 0;
    }

    .section-dark {
      background: var(--bg-dark);
      color: white;
    }

    .section-title {
      font-size: 32px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 16px;
      text-align: center;
    }

    .section-dark .section-title {
      color: white;
    }

    .section-sub {
      text-align: center;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto 48px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }

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

    .pain-dot {
      width: 10px;
      height: 10px;
      background: #E03A3E;
      border-radius: 50%;
      margin-bottom: 18px;
    }

    .card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--text-heading);
    }

    .card p {
      color: var(--text-muted);
    }

    .solution-img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-radius: 16px 16px 0 0;
      margin: -32px -32px 20px -32px;
      width: calc(100% + 64px);
    }

    .text-link {
      color: var(--primary-start);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .stat-badge {
      text-align: center;
    }

    .stat-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 700;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 8px;
    }

    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 14px;
    }

    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      display: flex;
      gap: 18px;
      align-items: flex-start;
      border-left: 5px solid var(--primary-start);
      box-shadow: var(--card-shadow);
    }

    .testimonial-avatar {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: #E0EDE0;
      flex-shrink: 0;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
    }

    .testimonial-text {
      font-style: italic;
      color: var(--text-body);
    }

    .faq-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 16px;
      box-shadow: var(--card-shadow);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: white;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background: #f6fbf6;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 28px;
      transition: all 0.35s ease;
      color: var(--text-muted);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding: 0 28px 20px;
    }

    .faq-item.open .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-arrow {
      transition: transform 0.3s;
      font-size: 18px;
    }

    .cta-block {
      background: var(--primary-gradient);
      text-align: center;
      padding: 80px 24px;
      border-radius: 32px;
      color: white;
    }

    .btn-gold {
      background: var(--accent-gradient);
      color: #0B1E14;
      font-weight: 700;
      padding: 16px 40px;
      border-radius: 50px;
      font-size: 18px;
      display: inline-block;
      margin-top: 24px;
      transition: all 0.3s;
    }

    .btn-gold:hover {
      transform: scale(1.03);
      box-shadow: 0 10px 20px rgba(245,166,35,0.4);
      opacity: 1;
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .footer a {
      color: rgba(255,255,255,0.7);
    }

    .footer a:hover {
      color: white;
      opacity: 1;
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-image {
        min-height: 280px;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .hero {
        padding: 120px 0 80px;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .grid-3, .grid-4 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section {
        padding: 60px 0;
      }
    }