/* roulang page: index */
:root {
      --bg-base: #0B0E14;
      --bg-surface: #141923;
      --bg-card: #1A2130;
      --bg-card-hover: #222C40;
      --color-primary: #00F5A0;
      --color-accent: #00D9F5;
      --color-highlight: #7B61FF;
      --text-main: #F1F5F9;
      --text-muted: #94A3B8;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 245, 160, 0.4);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 0 25px rgba(0, 245, 160, 0.2);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-base);
      overflow-x: hidden;
      font-size: 16px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
      border: none;
      outline: none;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部元数据条与主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 14, 20, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
    }

    .top-meta-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 12px;
      padding: 6px 0;
      color: var(--text-muted);
    }

    .top-meta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .node-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 0 0 8px var(--color-primary);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.4; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.1); }
      100% { opacity: 0.4; transform: scale(0.9); }
    }

    .main-nav {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #fff;
    }

    .brand-logo svg {
      width: 28px;
      height: 28px;
      fill: var(--color-primary);
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 24px;
      align-items: center;
    }

    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 0;
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--color-primary);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--color-primary);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      text-align: center;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #07090D;
      box-shadow: 0 0 15px rgba(0, 245, 160, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 245, 160, 0.5);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-main);
      border: 1px solid var(--border-subtle);
    }

    .btn-outline:hover {
      border-color: var(--color-primary);
      color: var(--color-primary);
      background: rgba(0, 245, 160, 0.05);
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 板块通用体系 */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .section-header {
      max-width: 760px;
      margin: 0 auto 50px auto;
      text-align: center;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 600;
      color: var(--color-primary);
      background: rgba(0, 245, 160, 0.1);
      border: 1px solid rgba(0, 245, 160, 0.2);
      border-radius: 20px;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 18px;
      color: #fff;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero Section (硬性蓝图：拼团转化/成团人数提示+开团参团双按钮) */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 245, 160, 0.08), transparent 70%),
                  linear-gradient(180deg, rgba(11, 14, 20, 0.9) 0%, rgba(11, 14, 20, 1) 100%),
                  url('/assets/images/8d3a7e33d00376b3.png') center/cover no-repeat;
      position: relative;
      text-align: center;
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
    }

    .group-pill {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(20, 25, 35, 0.85);
      border: 1px solid var(--border-focus);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 13px;
      margin-bottom: 24px;
      color: var(--text-main);
    }

    .group-avatar-stack {
      display: flex;
    }

    .group-avatar {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--color-accent);
      border: 2px solid var(--bg-surface);
      margin-left: -6px;
    }

    .group-avatar:first-child { margin-left: 0; }
    .group-avatar:nth-child(2) { background: var(--color-primary); }
    .group-avatar:nth-child(3) { background: var(--color-highlight); }

    .hero-h1 {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 22px;
      background: linear-gradient(135deg, #FFFFFF 40%, var(--color-primary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-text {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 34px;
      text-align: justify;
      text-align-last: center;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-meta-stats {
      display: flex;
      justify-content: center;
      gap: 36px;
      border-top: 1px solid var(--border-subtle);
      padding-top: 30px;
      max-width: 680px;
      margin: 0 auto;
    }

    .meta-stat-item h4 {
      font-size: 24px;
      color: var(--color-primary);
      font-weight: 700;
    }

    .meta-stat-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 2. 入口矩阵区 (matrix-gate) */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .entry-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .entry-card:hover {
      border-color: var(--border-focus);
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }

    .entry-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(0, 245, 160, 0.1);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .entry-card h3 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 10px;
    }

    .entry-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .entry-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--color-primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 3. 最新动态 (news) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .news-card:hover {
      border-color: var(--border-focus);
      transform: translateY(-4px);
    }

    .news-thumb {
      height: 180px;
      overflow: hidden;
      position: relative;
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }

    .news-tag-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(11, 14, 20, 0.8);
      color: var(--color-accent);
      padding: 3px 10px;
      border-radius: 4px;
      font-size: 11px;
      font-weight: 600;
    }

    .news-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    /* 4. 精选分类 (categories) */
    .cat-wrapper {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }

    .cat-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      padding: 20px;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--color-primary);
    }

    .cat-item h3 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 8px;
    }

    .cat-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 5. 架构与资讯 (overview/architecture) */
    .arch-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .arch-content h3 {
      font-size: 26px;
      color: #fff;
      margin-bottom: 18px;
      line-height: 1.35;
    }

    .arch-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 18px;
    }

    .spec-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .spec-item {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-subtle);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: var(--color-accent);
    }

    .arch-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
    }

    /* 6. 版本更新与演进日志 (version/roadmap) */
    .version-timeline {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
      padding-left: 30px;
      border-left: 2px solid rgba(0, 245, 160, 0.2);
    }

    .version-node {
      position: relative;
      margin-bottom: 35px;
    }

    .version-node:last-child {
      margin-bottom: 0;
    }

    .version-dot {
      position: absolute;
      left: -37px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 0 0 10px var(--color-primary);
    }

    .version-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 8px;
    }

    .version-tag {
      background: var(--color-primary);
      color: #07090D;
      font-weight: 700;
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 4px;
    }

    .version-date {
      font-size: 13px;
      color: var(--text-muted);
    }

    .version-body {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      padding: 18px;
      border-radius: var(--radius-md);
    }

    .version-body h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 6px;
    }

    .version-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. App/多端支持 (multi-client) */
    .multi-client-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .client-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      padding: 28px;
      border-radius: var(--radius-md);
      text-align: center;
      transition: all 0.3s ease;
    }

    .client-card:hover {
      border-color: var(--border-focus);
      transform: translateY(-4px);
    }

    .client-card h4 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
    }

    .client-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    /* 8. 核心优势六卡 (advantages) */
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: all 0.3s ease;
    }

    .adv-card:hover {
      border-color: var(--color-primary);
      transform: translateY(-4px);
    }

    .adv-card h3 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 10px;
    }

    .adv-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 9. 结果与方案对比 (comparison) */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 13px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .compare-table th {
      background: var(--bg-surface);
      color: var(--text-main);
      font-weight: 600;
    }

    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    .highlight-cell {
      color: var(--color-primary);
      font-weight: 600;
    }

    /* 10. 落地应用场景 (cases) */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .case-card-img {
      height: 160px;
    }

    .case-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-card-body {
      padding: 20px;
    }

    .case-card-body h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 10px;
    }

    .case-card-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. 用户口碑评价 (reviews) */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      padding: 24px;
      border-radius: var(--radius-md);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-primary);
      font-weight: 700;
      font-size: 14px;
    }

    .review-user h5 {
      font-size: 14px;
      color: #fff;
    }

    .review-user span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. 快速解答与常见问题 (faq) */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    .faq-item summary {
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: '+';
      font-size: 18px;
      color: var(--color-primary);
    }

    .faq-item[open] summary::after {
      content: '−';
    }

    .faq-item p {
      padding: 0 22px 18px 22px;
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 13. 转化与集成咨询表单 (contact) */
    .contact-card-box {
      background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(20, 25, 35, 0.7) 100%);
      border: 1px solid var(--border-focus);
      border-radius: var(--radius-lg);
      padding: 44px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      box-shadow: var(--shadow-glow);
    }

    .contact-info h3 {
      font-size: 26px;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.35;
    }

    .contact-info p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 13.5px;
      color: var(--text-muted);
    }

    .contact-list li strong {
      color: #fff;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
    }

    .form-input, .form-select, .form-textarea {
      background: rgba(11, 14, 20, 0.7);
      border: 1px solid var(--border-subtle);
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 13px;
      transition: border-color 0.2s ease;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--color-primary);
    }

    .form-textarea {
      resize: vertical;
      min-height: 80px;
    }

    /* 页脚 */
    .site-footer {
      background: #080B0F;
      border-top: 1px solid var(--border-subtle);
      padding: 60px 0 30px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-col p {
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .footer-trust-badge {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 12px;
      font-size: 12px;
      color: var(--text-muted);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12px;
    }

    /* 移动端抽屉遮罩 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(11, 14, 20, 0.96);
      backdrop-filter: blur(16px);
      z-index: 2000;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 24px;
    }

    .mobile-drawer.active {
      display: flex;
    }

    .mobile-drawer-close {
      position: absolute;
      top: 24px;
      right: 24px;
      background: transparent;
      color: #fff;
      font-size: 28px;
      cursor: pointer;
    }

    .drawer-link {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
    }

    .drawer-link:hover {
      color: var(--color-primary);
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 38px; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-2x3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-card-box { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-action { display: none; }
      .mobile-toggle { display: block; }
      .hero-h1 { font-size: 30px; }
      .grid-3 { grid-template-columns: 1fr; }
      .multi-client-wrap { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .hero-meta-stats { flex-direction: column; gap: 16px; }
      .footer-grid { grid-template-columns: 1fr; }
      .contact-card-box { padding: 24px; }
      .section { padding: 60px 0; }
    }

    @media (max-width: 520px) {
      .grid-4 { grid-template-columns: 1fr; }
      .grid-2x3 { grid-template-columns: 1fr; }
      .hero-actions { flex-direction: column; width: 100%; }
      .btn { width: 100%; }
    }