/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-light: #2563EB;
      --accent: #0EA5E9;
      --success: #10B981;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --text: #334155;
      --text-light: #64748B;
      --bg-light: #F8FAFC;
      --white: #FFFFFF;
      --border: #E2E8F0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --radius: 14px;
      --transition: 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: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--white);
      color: var(--text);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 顶部导航条 */
    .top-bar {
      background-color: #F1F5F9;
      font-size: 0.825rem;
      color: var(--text-light);
      border-bottom: 1px solid var(--border);
      padding: 0.4rem 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-info {
      display: flex;
      gap: 1.5rem;
    }

    .main-header {
      position: sticky;
      top: 0;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
      z-index: 1000;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 0.6rem;
      letter-spacing: -0.5px;
    }
    .brand-logo i {
      font-size: 1.4rem;
      color: var(--primary-light);
    }

    .nav-menu {
      display: flex;
      list-style: none;
      gap: 1.8rem;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text);
      font-size: 0.95rem;
    }
    .nav-link:hover {
      color: var(--primary-light);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.75rem 1.6rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      font-size: 0.95rem;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary-light);
      color: var(--white);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
    }
    .btn-outline {
      border-color: var(--border);
      background-color: var(--white);
      color: var(--text);
    }
    .btn-outline:hover {
      border-color: var(--primary-light);
      color: var(--primary-light);
    }
    .btn-accent {
      background-color: var(--accent);
      color: var(--white);
    }
    .btn-accent:hover {
      filter: brightness(0.95);
    }

    /* Section 通用规范 */
    section {
      padding: 5rem 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-light);
    }
    .section-dark {
      background-color: var(--dark);
      color: var(--white);
    }
    .section-header {
      text-align: center;
      margin-bottom: 3.5rem;
    }
    .section-badge {
      display: inline-block;
      padding: 0.3rem 0.85rem;
      background: #EFF6FF;
      color: var(--primary-light);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 9999px;
      margin-bottom: 0.75rem;
      border: 1px solid #DBEAFE;
    }
    .section-dark .section-badge {
      background: rgba(37, 99, 235, 0.2);
      border-color: rgba(37, 99, 235, 0.4);
      color: #93C5FD;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--dark);
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .section-dark .section-title {
      color: var(--white);
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-light);
      max-width: 720px;
      margin: 0 auto;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 1. Hero 板块（地图/本地感与沉浸感） */
    .hero-section {
      padding: 4.5rem 0 5rem;
      background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
      border-bottom: 1px solid var(--border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-region-bar {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      margin-bottom: 1.25rem;
      flex-wrap: wrap;
    }
    .region-chip {
      background-color: #E2E8F0;
      font-size: 0.8rem;
      padding: 0.2rem 0.65rem;
      border-radius: 4px;
      color: #475569;
      font-weight: 500;
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--dark);
      margin-bottom: 1.2rem;
      letter-spacing: -1px;
    }
    .hero-intro {
      font-size: 1.1rem;
      color: var(--text);
      margin-bottom: 2rem;
      line-height: 1.75;
    }
    .hero-actions {
      display: flex;
      gap: 1rem;
      margin-bottom: 2.2rem;
    }
    .hero-highlights {
      display: flex;
      gap: 2rem;
      border-top: 1px solid var(--border);
      padding-top: 1.5rem;
    }
    .hero-highlight-item {
      display: flex;
      flex-direction: column;
    }
    .hero-highlight-item span:first-child {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
    }
    .hero-highlight-item span:last-child {
      font-size: 0.85rem;
      color: var(--text-light);
    }
    .hero-media-card {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-xl);
      border: 1px solid var(--border);
    }
    .hero-media-card img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .hero-media-badge {
      position: absolute;
      bottom: 1.5rem;
      left: 1.5rem;
      right: 1.5rem;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(10px);
      padding: 1.2rem;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--white);
    }

    /* 2. 客户案例（Cases） */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .case-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      box-shadow: var(--shadow-xl);
      transform: translateY(-4px);
    }
    .case-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-thumb img {
      transform: scale(1.05);
    }
    .case-tag {
      position: absolute;
      top: 1rem;
      left: 1rem;
      background: var(--primary);
      color: var(--white);
      font-size: 0.75rem;
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      font-weight: 600;
    }
    .case-content {
      padding: 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .case-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.6rem;
    }
    .case-desc {
      font-size: 0.92rem;
      color: var(--text-light);
      margin-bottom: 1.2rem;
      flex: 1;
    }
    .case-metric {
      display: flex;
      justify-content: space-between;
      border-top: 1px dashed var(--border);
      padding-top: 0.8rem;
      font-size: 0.85rem;
    }
    .case-metric strong {
      color: var(--success);
    }

    /* 3. 结果数据统计（Metric Counters） */
    .metric-band {
      background: linear-gradient(135deg, #1E40AF 0%, #1E293B 100%);
      color: var(--white);
      padding: 4rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-item {
      padding: 1.5rem;
      border-right: 1px solid rgba(255, 255, 255, 0.15);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 3rem;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1;
      margin-bottom: 0.5rem;
      font-family: inherit;
    }
    .metric-label {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 0.35rem;
    }
    .metric-sub {
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* 4. 前后对比（Before / After） */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .compare-col {
      border-radius: var(--radius);
      padding: 2.2rem;
      border: 1px solid var(--border);
    }
    .compare-col.legacy {
      background: #FFF1F2;
      border-color: #FECDD3;
    }
    .compare-col.modern {
      background: #F0FDF4;
      border-color: #BBF7D0;
    }
    .compare-col h3 {
      font-size: 1.3rem;
      margin-bottom: 1.5rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .compare-col.legacy h3 {
      color: #BE123C;
    }
    .compare-col.modern h3 {
      color: #15803D;
    }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .compare-list li {
      display: flex;
      align-items: flex-start;
      gap: 0.75rem;
      font-size: 0.95rem;
    }
    .compare-col.legacy li i {
      color: #E11D48;
      margin-top: 0.2rem;
    }
    .compare-col.modern li i {
      color: #16A34A;
      margin-top: 0.2rem;
    }

    /* 5. 核心优势矩阵（6卡片网格） */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .advantage-card {
      background: var(--white);
      padding: 2rem;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .advantage-card:hover {
      box-shadow: var(--shadow-xl);
      border-color: #BFDBFE;
      transform: translateY(-3px);
    }
    .advantage-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: #EFF6FF;
      color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 1.25rem;
    }
    .advantage-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.6rem;
    }
    .advantage-card p {
      font-size: 0.92rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 6. 方法说明与业务流程（Workflow） */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .step-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.8rem;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 1rem;
    }
    .step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.5rem;
    }
    .step-card p {
      font-size: 0.9rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 7. 深色案例与沉浸式架构（Dark Showcase） */
    .dark-showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2.5rem;
      align-items: center;
    }
    .dark-showcase-info h3 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 1rem;
    }
    .dark-showcase-info p {
      color: #94A3B8;
      margin-bottom: 1.5rem;
      font-size: 0.98rem;
    }
    .spec-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
      margin-bottom: 2rem;
    }
    .spec-badge {
      background: #1E293B;
      border: 1px solid #334155;
      padding: 0.4rem 0.8rem;
      border-radius: 6px;
      font-size: 0.82rem;
      color: #E2E8F0;
    }
    .dark-img-wrap {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid #334155;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .dark-img-wrap img {
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    /* 8. 标杆客户故事（Customer Stories） */
    .story-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 3rem;
      box-shadow: var(--shadow-sm);
    }
    .quote-box {
      border-left: 4px solid var(--primary-light);
      padding-left: 1.5rem;
    }
    .quote-text {
      font-size: 1.15rem;
      font-style: italic;
      color: var(--dark);
      margin-bottom: 1.25rem;
      line-height: 1.7;
    }
    .quote-author {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
    }
    .quote-role {
      font-size: 0.82rem;
      color: var(--text-light);
    }
    .story-stats-table {
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 1.2rem;
    }
    .stat-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 0.8rem;
      border-bottom: 1px solid var(--border);
    }
    .stat-row span {
      font-size: 0.92rem;
      color: var(--text);
    }
    .stat-row strong {
      font-size: 1.2rem;
      color: var(--primary-light);
    }

    /* 9. 运营资讯列表（Community Insights） */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .insight-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.75rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .insight-card:hover {
      border-color: #93C5FD;
    }
    .insight-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 0.75rem;
      display: flex;
      gap: 0.75rem;
    }
    .insight-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .insight-card p {
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 1.2rem;
      line-height: 1.6;
    }

    /* 10. 常见异议拆解与问答（FAQ Accordion） */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .accordion-item {
      border: 1px solid var(--border);
      border-radius: 8px;
      margin-bottom: 1rem;
      background: var(--white);
      overflow: hidden;
    }
    .accordion-header {
      padding: 1.25rem 1.5rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      font-weight: 700;
      color: var(--dark);
      font-size: 1.05rem;
    }
    .accordion-header i {
      transition: transform 0.3s ease;
      color: var(--text-light);
    }
    .accordion-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #F8FAFC;
    }
    .accordion-content {
      padding: 1.25rem 1.5rem;
      font-size: 0.95rem;
      color: var(--text);
      line-height: 1.7;
      border-top: 1px solid var(--border);
    }
    .accordion-item.active .accordion-header {
      color: var(--primary-light);
    }
    .accordion-item.active .accordion-header i {
      transform: rotate(180deg);
      color: var(--primary-light);
    }

    /* 11. 合作伙伴生态徽章（Partners） */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 1.5rem;
    }
    .partner-badge {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 1rem;
      text-align: center;
      font-size: 0.85rem;
      font-weight: 600;
      color: #64748B;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      box-shadow: var(--shadow-sm);
    }

    /* 12. 咨询转化收口区（CTA & Form） */
    .cta-box {
      background: linear-gradient(135deg, #0F172A 0%, #1E40AF 100%);
      border-radius: 20px;
      padding: 3.5rem;
      color: var(--white);
      box-shadow: var(--shadow-xl);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3rem;
      align-items: center;
    }
    .cta-form {
      background: var(--white);
      padding: 2.2rem;
      border-radius: 12px;
      color: var(--dark);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    }
    .cta-form h4 {
      font-size: 1.2rem;
      margin-bottom: 0.4rem;
      font-weight: 700;
    }
    .cta-form p {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 1.25rem;
    }
    .form-group {
      margin-bottom: 1rem;
    }
    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 0.9rem;
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    /* Footer */
    footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid #1E293B;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-title {
      color: var(--white);
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-links a:hover {
      color: var(--white);
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 2rem;
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* 移动端菜单控制 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .cases-grid, .advantages-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1.5rem;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: flex;
      }
      .hero-grid, .dark-showcase-grid, .story-layout, .comparison-grid, .cta-box {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      }
      .cases-grid, .advantages-grid, .insights-grid, .workflow-timeline {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .hero-actions {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-box {
        padding: 2rem;
      }
    }