/* roulang page: index */
:root {
      --primary: #1A3636;
      --primary-dark: #122525;
      --accent: #C5A880;
      --accent-hover: #b0936b;
      --bg-light: #F8F9FA;
      --bg-alt: #F1F4F6;
      --bg-dark: #0F1416;
      --text-main: #111827;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --border-color: #E2E8F0;
      --border-dark: #222C30;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
      --max-width: 1240px;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      line-height: 1.7;
      color: var(--text-main);
      background-color: var(--bg-light);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background-color: var(--primary-dark);
      color: #D1D5DB;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

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

    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-badge::before {
      content: "";
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #10B981;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      font-weight: 800;
      font-size: 1.1rem;
    }

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

    .nav-links a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 8px 0;
    }

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

    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.3s ease;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius);
      font-size: 0.9375rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      min-height: 44px;
      min-width: 44px;
    }

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

    .btn-primary:hover {
      background-color: #244646;
      box-shadow: 0 4px 12px rgba(26, 54, 54, 0.25);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #111;
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
    }

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

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 板块排版公用 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }

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

    .section-block.bg-dark {
      background-color: var(--bg-dark);
      color: #F3F4F6;
    }

    .section-head {
      margin-bottom: 48px;
    }

    .section-head.center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-eyebrow {
      font-size: 0.8125rem;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 0.05em;
      color: var(--accent);
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2rem;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .bg-dark .section-title {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 1.0625rem;
      line-height: 1.7;
      color: var(--text-muted);
      max-width: 800px;
      text-align: justify;
    }

    .bg-dark .section-desc {
      color: #9CA3AF;
    }

    /* 板块 1: Hero (文档帮助检索型结构) */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(197, 168, 128, 0.12), transparent 45%),
                  linear-gradient(180deg, #F8F9FA 0%, #FFFFFF 100%);
      padding: 96px 0 80px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #E8ECEB;
      color: var(--primary);
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .hero-intro {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 36px;
      text-align: justify;
    }

    .hero-search-box {
      max-width: 640px;
      margin: 0 auto 24px;
      display: flex;
      gap: 8px;
      background: #FFFFFF;
      padding: 8px;
      border-radius: var(--radius);
      border: 1px solid #CBD5E1;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
    }

    .hero-search-box input {
      flex: 1;
      border: none;
      outline: none;
      padding: 0 16px;
      font-size: 0.9375rem;
      color: var(--text-main);
    }

    .hero-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    .hero-chip-item {
      background: #F1F5F9;
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 4px;
      color: var(--text-main);
    }

    .hero-chip-item:hover {
      background: #E2E8F0;
      color: var(--primary);
    }

    /* 板块 2: 左资讯流 + 右热榜 */
    .knowledge-split {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 36px;
    }

    .stream-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-bottom: 20px;
      transition: all 0.25s ease;
      display: flex;
      gap: 20px;
    }

    .stream-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      border-color: #CBD5E1;
    }

    .stream-thumb {
      width: 180px;
      height: 120px;
      flex-shrink: 0;
      border-radius: 4px;
      overflow: hidden;
      background: #E5E7EB;
    }

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

    .stream-content {
      flex: 1;
    }

    .stream-tag {
      font-size: 0.75rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 6px;
      display: inline-block;
    }

    .stream-title {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .stream-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .hot-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
    }

    .hot-head {
      font-size: 1.125rem;
      font-weight: 700;
      padding-bottom: 14px;
      margin-bottom: 16px;
      border-bottom: 2px solid var(--primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .hot-list {
      list-style: none;
    }

    .hot-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .hot-item:last-child {
      border-bottom: none;
    }

    .hot-num {
      width: 20px;
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--accent);
    }

    .hot-title {
      font-size: 0.875rem;
      color: var(--text-main);
      line-height: 1.5;
    }

    .hot-title:hover {
      color: var(--primary);
    }

    /* 板块 3: 专题条 (横向矩阵) */
    .topics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .topic-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      border-top: 3px solid var(--primary);
      transition: transform 0.25s ease;
    }

    .topic-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .topic-title {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--primary);
    }

    .topic-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 4: 架构与标准介绍 */
    .arch-intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

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

    .spec-badges {
      display: flex;
      gap: 12px;
      margin: 20px 0;
      flex-wrap: wrap;
    }

    .spec-item {
      font-size: 0.8125rem;
      background: #E5EDE9;
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    .arch-points {
      list-style: none;
      margin-top: 20px;
    }

    .arch-points li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 12px;
      font-size: 0.9375rem;
      color: var(--text-muted);
    }

    .arch-points li::before {
      content: "✔";
      position: absolute;
      left: 0;
      color: var(--primary);
      font-weight: bold;
    }

    /* 板块 5: 6宫格核心优势 */
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .strength-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      transition: all 0.25s ease;
      position: relative;
    }

    .strength-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      border-color: var(--accent);
    }

    .strength-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: #E2E8F0;
      margin-bottom: 12px;
    }

    .strength-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .strength-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 6: 业务场景方案 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .scenario-thumb {
      height: 190px;
      background: #E5E7EB;
    }

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

    .scenario-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .scenario-tag {
      font-size: 0.75rem;
      background: #EEF2F6;
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .scenario-title {
      font-size: 1.125rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .scenario-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }

    .scenario-checklist {
      list-style: none;
      font-size: 0.8125rem;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .scenario-checklist li {
      padding: 4px 0;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .scenario-checklist li::before {
      content: "•";
      color: var(--accent);
      font-size: 1.2rem;
    }

    /* 板块 7: 深色高对比治理机制与架构 */
    .deep-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .process-timeline {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .process-step {
      background: #171E21;
      border: 1px solid var(--border-dark);
      padding: 20px;
      border-radius: var(--radius);
      display: flex;
      gap: 16px;
    }

    .step-index {
      width: 32px;
      height: 32px;
      background: var(--accent);
      color: #111;
      font-weight: 700;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .step-info h4 {
      font-size: 1rem;
      color: #FFFFFF;
      margin-bottom: 6px;
    }

    .step-info p {
      font-size: 0.875rem;
      color: #9CA3AF;
      line-height: 1.6;
    }

    /* 板块 8: 标杆故事 */
    .story-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      border-left: 4px solid var(--primary);
    }

    .story-meta {
      font-size: 0.8125rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .story-title {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .story-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .story-result {
      background: var(--bg-alt);
      padding: 12px 16px;
      border-radius: 4px;
      font-size: 0.8125rem;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 板块 9: 关键量化数据条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-item {
      padding: 24px 16px;
      border-right: 1px solid var(--border-color);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-val {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 10: 客户评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .testi-quote {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    .author-name {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .author-title {
      font-size: 0.75rem;
      color: var(--text-light);
    }

    /* 板块 11: 合作伙伴 */
    .partners-wall {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }

    .partner-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      text-align: center;
      font-size: 0.875rem;
      font-weight: 600;
      color: #64748B;
      transition: all 0.25s ease;
    }

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

    /* 板块 12: 底部轻量转化表单与安全承诺 */
    .cta-banner-wrapper {
      background: linear-gradient(135deg, var(--primary) 0%, #0F2323 100%);
      color: #FFFFFF;
      padding: 60px 48px;
      border-radius: var(--radius);
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .cta-left h3 {
      font-size: 1.875rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .cta-left p {
      font-size: 0.9375rem;
      color: #CBD5E1;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .cta-badges {
      display: flex;
      gap: 16px;
      font-size: 0.8125rem;
      color: var(--accent);
    }

    .cta-form {
      background: #FFFFFF;
      padding: 28px;
      border-radius: var(--radius);
      color: var(--text-main);
    }

    .form-group {
      margin-bottom: 14px;
    }

    .form-group label {
      display: block;
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-muted);
    }

    .form-group input,
    .form-group select {
      width: 100%;
      height: 42px;
      padding: 0 12px;
      border: 1px solid var(--border-color);
      border-radius: 4px;
      outline: none;
      font-size: 0.875rem;
    }

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

    /* 页脚 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #9CA3AF;
      font-size: 0.875rem;
      padding: 64px 0 24px;
      border-top: 1px solid var(--border-dark);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

    /* 移动端菜单按钮与适配 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--primary);
    }

    @media (max-width: 1024px) {
      .knowledge-split,
      .arch-intro-grid,
      .deep-grid,
      .cta-banner-wrapper {
        grid-template-columns: 1fr;
      }

      .strengths-grid,
      .scenario-grid,
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .topics-strip {
        grid-template-columns: repeat(2, 1fr);
      }

      .partners-wall {
        grid-template-columns: repeat(3, 1fr);
      }

      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }

      .menu-toggle {
        display: block;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.active {
        display: flex;
      }

      .hero-title {
        font-size: 2rem;
      }

      .strengths-grid,
      .scenario-grid,
      .story-grid,
      .testimonial-grid,
      .topics-strip {
        grid-template-columns: 1fr;
      }

      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }

      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
      }

      .stream-card {
        flex-direction: column;
      }

      .stream-thumb {
        width: 100%;
        height: 160px;
      }

      .cta-banner-wrapper {
        padding: 36px 20px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }