/* roulang page: index */
:root {
      --primary: #00D084;
      --primary-hover: #00B975;
      --accent: #FF5A1F;
      --bg-dark: #0D1117;
      --bg-section: #161B22;
      --bg-card: #21262D;
      --text-main: #F0F6FC;
      --text-muted: #8B949E;
      --text-dim: #484F58;
      --border-color: rgba(240, 246, 252, 0.1);
      --border-active: rgba(0, 208, 132, 0.4);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Trebuchet MS", sans-serif;
      --font-mono: "DIN Alternate", "Trebuchet MS", monospace, sans-serif;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
      --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-dark);
      color: var(--text-main);
    }

    body {
      font-family: var(--font-family);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      background-color: var(--bg-dark);
    }

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

    ul, ol {
      list-style: none;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 17, 23, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      border-bottom: 1px solid rgba(240, 246, 252, 0.05);
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
    }

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

    .badge-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--primary);
      margin-right: 6px;
      box-shadow: 0 0 8px var(--primary);
    }

    .main-nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.35rem;
      letter-spacing: -0.5px;
      color: #fff;
    }

    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--primary);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-item {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 0;
      position: relative;
    }

    .nav-item:hover, .nav-item.active {
      color: #fff;
    }

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

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .btn-primary {
      background-color: var(--primary);
      color: #051a10;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 0 16px rgba(0, 208, 132, 0.4);
      transform: translateY(-1px);
    }

    .btn-secondary {
      background: var(--bg-card);
      border-color: var(--border-color);
      color: #fff;
    }

    .btn-secondary:hover {
      border-color: var(--text-muted);
      background: #2b313a;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 公共 Section 样式 */
    section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

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

    .section-header {
      max-width: 760px;
      margin: 0 auto 56px;
      text-align: center;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 208, 132, 0.1);
      border: 1px solid rgba(0, 208, 132, 0.25);
      border-radius: 20px;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 18px;
      color: #fff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 1: Hero */
    .hero-section {
      position: relative;
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 10%, rgba(0, 208, 132, 0.12), transparent 60%),
                  url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      overflow: hidden;
    }

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

    .hero-h1 {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 24px;
      color: #fff;
      letter-spacing: -0.8px;
    }

    .hero-h1 span {
      background: linear-gradient(90deg, #00D084, #4EFAAE);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.75;
    }

    .hero-checklist {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 40px;
    }

    .check-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
      background: rgba(33, 38, 45, 0.7);
      padding: 6px 16px;
      border-radius: 20px;
      border: 1px solid var(--border-color);
    }

    .check-item svg {
      width: 16px;
      height: 16px;
      fill: var(--primary);
    }

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

    /* 板块 2: 卖点三连 */
    .features-three-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-point-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      position: relative;
      transition: var(--transition);
      overflow: hidden;
    }

    .feature-point-card:hover {
      border-color: var(--border-active);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .feature-point-card .icon-box {
      width: 52px;
      height: 52px;
      background: rgba(0, 208, 132, 0.1);
      border: 1px solid rgba(0, 208, 132, 0.2);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      color: var(--primary);
    }

    .feature-point-card h3 {
      font-size: 1.3rem;
      margin-bottom: 12px;
      color: #fff;
    }

    .feature-point-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 3: 入口矩阵 */
    .portal-matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .portal-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 200px;
      transition: var(--transition);
    }

    .portal-card:hover {
      border-color: var(--primary);
      background: #252b34;
    }

    .portal-meta {
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 8px;
    }

    .portal-title {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: #fff;
    }

    .portal-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .portal-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 4: 最新发布 */
    .latest-news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .news-item-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px 24px;
      transition: var(--transition);
    }

    .news-item-row:hover {
      border-color: rgba(240, 246, 252, 0.25);
      background: #262c35;
    }

    .news-item-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .news-tag {
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 600;
      background: rgba(255, 90, 31, 0.15);
      color: var(--accent);
      border: 1px solid rgba(255, 90, 31, 0.3);
      white-space: nowrap;
    }

    .news-title {
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-main);
    }

    .news-meta-time {
      font-size: 0.85rem;
      color: var(--text-dim);
      font-family: var(--font-mono);
      white-space: nowrap;
    }

    /* 板块 5: 热门专题 */
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .topic-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .topic-img-wrapper {
      height: 220px;
      overflow: hidden;
      position: relative;
    }

    .topic-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .topic-card:hover .topic-img-wrapper img {
      transform: scale(1.05);
    }

    .topic-body {
      padding: 28px;
    }

    .topic-body h3 {
      font-size: 1.35rem;
      margin-bottom: 12px;
      color: #fff;
    }

    .topic-body p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

    /* 板块 6: 痛点对比区 */
    .vs-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .vs-box {
      border-radius: var(--radius-md);
      padding: 36px;
      border: 1px solid var(--border-color);
    }

    .vs-bad {
      background: rgba(22, 27, 34, 0.6);
      border-color: rgba(255, 90, 31, 0.2);
    }

    .vs-good {
      background: rgba(0, 208, 132, 0.04);
      border-color: rgba(0, 208, 132, 0.3);
    }

    .vs-header {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .vs-bad .vs-header {
      color: var(--accent);
    }

    .vs-good .vs-header {
      color: var(--primary);
    }

    .vs-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .vs-list li {
      position: relative;
      padding-left: 26px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .vs-bad li::before {
      content: '✕';
      position: absolute;
      left: 0;
      color: var(--accent);
      font-weight: bold;
    }

    .vs-good li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--primary);
      font-weight: bold;
    }

    /* 板块 7: 深度介绍与核心架构 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .arch-text h3 {
      font-size: 1.8rem;
      margin-bottom: 18px;
      color: #fff;
    }

    .arch-text p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .arch-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .stat-card-inline {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-sm);
    }

    .stat-card-inline .num {
      font-size: 1.75rem;
      font-weight: 800;
      font-family: var(--font-mono);
      color: var(--primary);
    }

    .stat-card-inline .lbl {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .arch-visual {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    /* 板块 8: 核心优势 6 卡片 */
    .six-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .six-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
    }

    .six-card:hover {
      border-color: var(--border-active);
      transform: translateY(-3px);
    }

    .six-card h4 {
      font-size: 1.2rem;
      color: #fff;
      margin-bottom: 12px;
    }

    .six-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 9: 资讯列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .article-thumb {
      height: 180px;
      overflow: hidden;
    }

    .article-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .article-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-content h4 {
      font-size: 1.15rem;
      color: #fff;
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .article-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .article-foot {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-dim);
    }

    /* 板块 10: 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      position: relative;
    }

    .step-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      background: var(--primary);
      color: #0d1117;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin: 0 auto 20px;
      font-family: var(--font-mono);
    }

    .step-box h4 {
      font-size: 1.2rem;
      color: #fff;
      margin-bottom: 12px;
    }

    .step-box p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 11: 数据指标 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 40px 24px;
      text-align: center;
    }

    .metric-item .val {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary);
      font-family: var(--font-mono);
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-item .label {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 板块 12: 用户真实场景故事 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
    }

    .scenario-tag {
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 12px;
      display: block;
    }

    .scenario-card h4 {
      font-size: 1.25rem;
      color: #fff;
      margin-bottom: 14px;
    }

    .scenario-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 13: 适用人群 */
    .persona-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .persona-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }

    .persona-box:hover {
      border-color: var(--primary);
    }

    .persona-box h5 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 10px;
    }

    .persona-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 14: 口碑评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-stars {
      color: #FFB800;
      margin-bottom: 16px;
      font-size: 1rem;
      letter-spacing: 2px;
    }

    .testi-card p {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 24px;
      font-style: italic;
    }

    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #2d333b;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    .testi-user-name {
      font-size: 0.92rem;
      font-weight: 600;
      color: #fff;
    }

    .testi-user-role {
      font-size: 0.78rem;
      color: var(--text-dim);
    }

    /* 板块 15: 常见问答 */
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-item details summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #fff;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

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

    .faq-item details summary::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--primary);
      transition: var(--transition);
    }

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

    .faq-content {
      padding: 0 24px 22px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 16: 联系入口与最终转化 */
    .cta-banner-wrap {
      background: linear-gradient(135deg, rgba(0, 208, 132, 0.15) 0%, rgba(22, 27, 34, 0.95) 100%),
                  url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
      border: 1px solid var(--border-active);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 40px;
    }

    .cta-text h3 {
      font-size: 2.2rem;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .cta-text p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 600px;
    }

    .cta-buttons {
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-width: 240px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #080b0f;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1.2fr;
      gap: 48px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      color: #fff;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 20px;
      color: var(--text-muted);
    }

    .footer-title {
      font-size: 0.95rem;
      color: #fff;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .footer-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .footer-contact-item {
      margin-bottom: 12px;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid rgba(240, 246, 252, 0.06);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .portal-matrix-grid, .persona-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .features-three-grid, .six-cards-grid, .articles-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .arch-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #11151c;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
      }
      .nav-links.open {
        display: flex;
      }
      .hero-h1 {
        font-size: 2.2rem;
      }
      .features-three-grid, .topics-grid, .vs-container, .six-cards-grid, 
      .articles-grid, .steps-row, .metrics-bar, .scenario-grid, 
      .testimonial-grid, .persona-grid {
        grid-template-columns: 1fr;
      }
      .cta-banner-wrap {
        flex-direction: column;
        text-align: center;
        padding: 40px 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }