/* roulang page: index */
:root {
      --color-primary: #00D26A;
      --color-primary-hover: #00b359;
      --color-primary-soft: rgba(0, 210, 106, 0.12);
      --color-dark: #0F141C;
      --color-dark-deep: #090C10;
      --color-dark-surface: #171E28;
      --color-text-main: #1A202C;
      --color-text-muted: #64748B;
      --color-bg-light: #F4F6F8;
      --color-border: #E2E8F0;
      --color-border-dark: rgba(255, 255, 255, 0.1);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.07);
      --shadow-dark: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
      --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-family);
      color: var(--color-text-main);
      background-color: #FFFFFF;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* Top Bar */
    .top-bar {
      background-color: #FAFAFC;
      border-bottom: 1px solid var(--color-border);
      font-size: 0.8125rem;
      color: var(--color-text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-contact-list {
      display: flex;
      gap: 20px;
    }

    /* Main Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--color-dark);
      letter-spacing: -0.01em;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      background: var(--color-dark);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-primary);
      font-weight: 900;
      font-size: 1.1rem;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 28px;
    }
    .nav-links a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #334155;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--color-primary-hover);
    }
    .nav-btn {
      display: inline-flex;
      align-items: center;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition-fast);
    }
    .nav-btn-primary {
      background-color: var(--color-primary);
      color: #0F141C;
    }
    .nav-btn-primary:hover {
      background-color: var(--color-primary-hover);
      box-shadow: 0 4px 12px rgba(0, 210, 106, 0.25);
    }

    /* Section Global Styles */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-light {
      background-color: #FFFFFF;
    }
    .section-gray {
      background-color: var(--color-bg-light);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }
    .section-dark {
      background-color: var(--color-dark);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 56px;
      max-width: 760px;
    }
    .section-header.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 12px;
      background: var(--color-primary-soft);
      color: #008744;
    }
    .badge-dark {
      background: rgba(0, 210, 106, 0.15);
      color: var(--color-primary);
    }
    h2.section-title {
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--color-text-muted);
      line-height: 1.7;
    }
    .section-dark .section-subtitle {
      color: #94A3B8;
    }

    /* 1. Hero: 拼团协同/集团采购转化 */
    .hero-section {
      position: relative;
      background: #0B0E14 url('/assets/images/89aa3d3dff6da7b3.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 110px 0 100px;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 20, 28, 0.94) 30%, rgba(15, 20, 28, 0.8) 100%);
    }
    .hero-container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(2.25rem, 4vw, 3.25rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #CBD5E1;
      margin-bottom: 32px;
      max-width: 620px;
      line-height: 1.75;
    }
    .hero-campaign-card {
      background: rgba(23, 30, 40, 0.85);
      border: 1px solid var(--color-border-dark);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-dark);
      backdrop-filter: blur(8px);
    }
    .campaign-tag-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .progress-bar-wrap {
      margin-bottom: 24px;
    }
    .progress-info {
      display: flex;
      justify-content: space-between;
      font-size: 0.875rem;
      margin-bottom: 8px;
      color: #E2E8F0;
    }
    .progress-bg {
      height: 8px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-full);
      overflow: hidden;
    }
    .progress-bar {
      width: 78%;
      height: 100%;
      background: var(--color-primary);
      border-radius: var(--radius-full);
    }
    .hero-action-group {
      display: flex;
      gap: 16px;
    }
    .btn-main {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 14px 20px;
      background: var(--color-primary);
      color: #0F141C;
      font-weight: 700;
      border-radius: var(--radius-sm);
      text-align: center;
      transition: var(--transition-fast);
    }
    .btn-main:hover {
      background: var(--color-primary-hover);
      box-shadow: 0 6px 16px rgba(0, 210, 106, 0.3);
    }
    .btn-secondary {
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 14px 20px;
      background: transparent;
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.25);
      font-weight: 600;
      border-radius: var(--radius-sm);
      text-align: center;
      transition: var(--transition-fast);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: #FFFFFF;
    }

    /* 2. 功能亮点 (Features) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition-fast);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--color-primary);
    }
    .feature-num {
      font-size: 1.125rem;
      font-weight: 800;
      color: var(--color-primary);
      margin-bottom: 12px;
      display: block;
    }
    .feature-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--color-dark);
    }
    .feature-card p {
      font-size: 0.9375rem;
      color: var(--color-text-muted);
      line-height: 1.65;
    }

    /* 3. 场景矩阵 (Scenarios) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .scenario-item {
      display: flex;
      gap: 24px;
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      align-items: center;
    }
    .scenario-img-wrap {
      width: 140px;
      height: 110px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      flex-shrink: 0;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .scenario-detail h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--color-dark);
    }
    .scenario-detail p {
      font-size: 0.9rem;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 4. 流程步骤 (Process) */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .process-node {
      position: relative;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      padding: 28px 22px;
      border-radius: var(--radius-md);
    }
    .process-step-idx {
      width: 36px;
      height: 36px;
      background: var(--color-primary-soft);
      color: #008744;
      border-radius: var(--radius-full);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      margin-bottom: 16px;
    }
    .process-node h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--color-dark);
    }
    .process-node p {
      font-size: 0.875rem;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 5. 截图/演示 (Showcase) */
    .showcase-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .showcase-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .showcase-content h3 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--color-dark);
    }
    .showcase-content p {
      font-size: 0.95rem;
      color: var(--color-text-muted);
      margin-bottom: 20px;
    }
    .showcase-bullets {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .showcase-bullets li {
      font-size: 0.925rem;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .showcase-bullets li::before {
      content: "✔";
      color: var(--color-primary);
      font-weight: 800;
    }

    /* 6. 客户证言与评价墙 (Testimonials) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-text {
      font-size: 0.9375rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--color-dark);
    }
    .author-meta span {
      font-size: 0.8125rem;
      color: var(--color-text-muted);
    }

    /* 7. 套餐对比 (Packages) */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .pricing-card.featured {
      border: 2px solid var(--color-primary);
      box-shadow: var(--shadow-md);
    }
    .pricing-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--color-primary);
      color: #0F141C;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: var(--radius-full);
    }
    .pricing-header {
      margin-bottom: 24px;
      text-align: center;
    }
    .pricing-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .pricing-target {
      font-size: 0.875rem;
      color: var(--color-text-muted);
    }
    .pricing-features {
      list-style: none;
      margin: 24px 0 32px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .pricing-features li {
      font-size: 0.9rem;
      color: #475569;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-features li::before {
      content: "•";
      color: var(--color-primary);
      font-size: 1.2rem;
    }

    /* 8. 行业资讯与技术快讯 (News) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition-fast);
    }
    .news-card:hover {
      box-shadow: var(--shadow-sm);
      border-color: #CBD5E1;
    }
    .news-meta {
      padding: 20px 20px 8px;
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: var(--color-text-muted);
    }
    .news-title {
      padding: 0 20px 12px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--color-dark);
      line-height: 1.45;
    }
    .news-summary {
      padding: 0 20px 20px;
      font-size: 0.85rem;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 9. 结果数据条 (Stats) */
    .stats-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item {
      padding: 24px 16px;
      border-right: 1px solid var(--color-border-dark);
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.1;
      margin-bottom: 8px;
      font-family: monospace, sans-serif;
    }
    .stat-label {
      font-size: 0.9375rem;
      color: #94A3B8;
      font-weight: 500;
    }

    /* 10. 爆款清单 (Hot Modules) */
    .hot-list-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .hot-item-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .hot-badge {
      align-self: flex-start;
      background: #FEF3C7;
      color: #92400E;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .hot-item-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .hot-item-card p {
      font-size: 0.875rem;
      color: var(--color-text-muted);
      margin-bottom: 18px;
      line-height: 1.6;
    }

    /* 11. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    details.faq-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-fast);
    }
    details.faq-item[open] {
      border-color: var(--color-primary);
    }
    summary.faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--color-dark);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    summary.faq-question::-webkit-details-marker {
      display: none;
    }
    summary.faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--color-text-muted);
      transition: transform 0.2s;
    }
    details.faq-item[open] summary.faq-question::after {
      transform: rotate(45deg);
      color: var(--color-primary);
    }
    .faq-answer {
      padding: 0 24px 24px;
      font-size: 0.9375rem;
      color: #475569;
      line-height: 1.7;
    }

    /* 12. 下载引导与全域接入收口 (Download & Delivery) */
    .download-cta-box {
      background: linear-gradient(135deg, #0F141C 0%, #171E28 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
      border: 1px solid var(--color-border-dark);
    }
    .download-left h2 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .download-left p {
      font-size: 0.95rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .doc-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .doc-pill {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      padding: 10px 18px;
      font-size: 0.875rem;
      color: #E2E8F0;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .doc-pill:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: var(--color-primary);
    }
    .download-right-form {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--color-dark);
    }
    .download-right-form h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-input {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      outline: none;
      transition: var(--transition-fast);
    }
    .form-input:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 2px rgba(0, 210, 106, 0.2);
    }
    .btn-submit {
      width: 100%;
      padding: 12px;
      background: var(--color-primary);
      color: #0F141C;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition-fast);
    }
    .btn-submit:hover {
      background: var(--color-primary-hover);
    }

    /* Footer */
    .site-footer {
      background: var(--color-dark-deep);
      color: #94A3B8;
      font-size: 0.875rem;
      padding: 80px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      max-width: 380px;
    }
    .footer-column h5 {
      color: #FFFFFF;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--color-primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-container {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .testimonial-grid, .hot-list-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-grid, .stats-bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .showcase-wrapper, .download-cta-box {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 64px 0;
      }
      .nav-links, .top-bar {
        display: none;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .testimonial-grid, .hot-list-grid, .process-timeline, .news-grid, .stats-bar-grid {
        grid-template-columns: 1fr;
      }
      .hero-action-group {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }