/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-dark: #090D16;
      --accent: #00D285;
      --accent-blue: #0284C7;
      --accent-hover: #00b371;
      --bg-body: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: rgba(15, 23, 42, 0.08);
      --border-light: rgba(255, 255, 255, 0.1);
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-card: 0 1px 3px rgba(0,0,0,0.05), 0 20px 25px -5px rgba(0,0,0,0.02);
      --shadow-hover: 0 10px 25px -5px rgba(15, 23, 42, 0.1);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.2s ease-in-out;
      --container: 1240px;
    }

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

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

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-body);
      line-height: 1.7;
      -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: var(--container);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 顶部复合导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--primary-dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 0.4rem 0;
      border-bottom: 1px solid var(--border-light);
    }

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

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #E2E8F0;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    .nav-main {
      padding: 0.85rem 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

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

    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 2rem;
    }

    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #334155;
    }

    .nav-link:hover {
      color: var(--accent-blue);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.65rem 1.4rem;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      gap: 8px;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

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

    .btn-primary:hover {
      background: #1E293B;
      color: #FFFFFF;
    }

    .btn-accent {
      background: var(--accent);
      color: var(--primary-dark);
      box-shadow: 0 4px 14px rgba(0, 210, 133, 0.25);
    }

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

    .btn-outline {
      border-color: rgba(15, 23, 42, 0.2);
      background: #FFFFFF;
      color: var(--primary);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--primary);
    }

    /* 全局板块修饰 */
    .section-spacing {
      padding: 5.5rem 0;
    }

    .section-spacing-alt {
      padding: 5.5rem 0;
      background-color: var(--bg-white);
    }

    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 3.5rem;
    }

    .section-kicker {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--accent-blue);
      margin-bottom: 0.6rem;
    }

    .section-title {
      font-size: clamp(1.75rem, 3.5vw, 2.25rem);
      font-weight: 700;
      letter-spacing: -0.01em;
      line-height: 1.3;
      margin-bottom: 1rem;
      color: var(--primary);
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.7;
      max-width: 65ch;
      margin: 0 auto;
    }

    /* 板块一：首屏 Hero */
    .hero-section {
      position: relative;
      background: #090D16 url('/assets/images/72c5b17292101ff1.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 6.5rem 0 5.5rem;
      overflow: hidden;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(9,13,22,0.92) 0%, rgba(15,23,42,0.85) 100%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.2fr 0.9fr;
      gap: 3.5rem;
      align-items: center;
    }

    .hero-h1 {
      font-size: clamp(2.25rem, 5vw, 3.75rem);
      font-weight: 800;
      line-height: 1.18;
      letter-spacing: -0.02em;
      margin-bottom: 1.5rem;
      color: #FFFFFF;
    }

    .hero-h1 span {
      background: linear-gradient(90deg, #FFFFFF, var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-intro {
      font-size: 1.125rem;
      color: #CBD5E1;
      margin-bottom: 2.2rem;
      line-height: 1.75;
      max-width: 62ch;
    }

    .hero-actions {
      display: flex;
      gap: 1.2rem;
      align-items: center;
      margin-bottom: 2.5rem;
    }

    .hero-meta-strip {
      display: flex;
      gap: 2rem;
      border-top: 1px solid rgba(255,255,255,0.12);
      padding-top: 1.5rem;
    }

    .hero-meta-item strong {
      display: block;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--accent);
    }

    .hero-meta-item span {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    .hero-preview-board {
      background: rgba(15, 23, 42, 0.7);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }

    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 0.8rem;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      margin-bottom: 1rem;
      font-size: 0.85rem;
      color: #94A3B8;
    }

    .board-tag {
      background: rgba(0, 210, 133, 0.15);
      color: var(--accent);
      padding: 0.2rem 0.6rem;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      font-weight: 600;
    }

    .board-screen {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 1rem;
      border: 1px solid rgba(255,255,255,0.1);
    }

    .board-grid-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
      text-align: center;
    }

    .metric-cell {
      background: rgba(255,255,255,0.03);
      padding: 0.6rem;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.05);
    }

    .metric-cell div {
      font-size: 0.75rem;
      color: #94A3B8;
    }

    .metric-cell b {
      color: #FFFFFF;
      font-size: 0.95rem;
    }

    /* 板块二：平台核心介绍 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }

    .spec-sheet {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-card);
    }

    .spec-item {
      display: flex;
      justify-content: space-between;
      padding: 0.85rem 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.9375rem;
    }

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

    .spec-label {
      color: var(--text-muted);
    }

    .spec-val {
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块三：核心技术优势矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }

    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 1.5rem;
      right: 1.5rem;
      height: 2px;
      background: transparent;
      transition: var(--transition);
    }

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

    .feature-card:hover::before {
      background: var(--accent-blue);
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(2, 132, 199, 0.08);
      color: var(--accent-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.25rem;
      font-size: 1.25rem;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      color: var(--primary);
    }

    .feature-card p {
      color: var(--text-muted);
      font-size: 0.9375rem;
      line-height: 1.65;
    }

    /* 板块四：产品核心模块 */
    .product-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

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

    .product-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }

    .product-img-box {
      aspect-ratio: 16/9;
      overflow: hidden;
      position: relative;
    }

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

    .product-card:hover .product-img-box img {
      transform: scale(1.05);
    }

    .product-body {
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .product-tag {
      font-size: 0.75rem;
      color: var(--accent-blue);
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 0.5rem;
    }

    .product-body h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.85rem;
      color: var(--primary);
    }

    .product-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 1.25rem;
      line-height: 1.65;
      flex-grow: 1;
    }

    .product-footer {
      border-top: 1px solid var(--border-color);
      padding-top: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.875rem;
    }

    .product-footer span {
      font-weight: 600;
      color: var(--accent);
    }

    /* 板块五：高并发实战深色区 */
    .dark-showcase {
      background: var(--primary-dark);
      color: #FFFFFF;
      position: relative;
    }

    .dark-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }

    .dark-content h2 {
      color: #FFFFFF;
      margin-bottom: 1.2rem;
    }

    .dark-content p {
      color: #94A3B8;
      font-size: 1rem;
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    .dark-cards-col {
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    .dark-subcard {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-sm);
      padding: 1.5rem;
    }

    .dark-subcard h3 {
      font-size: 1.1rem;
      color: #FFFFFF;
      margin-bottom: 0.5rem;
    }

    .dark-subcard p {
      font-size: 0.875rem;
      color: #94A3B8;
      margin: 0;
    }

    /* 板块六：场景运维故事 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2.5rem;
    }

    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .story-img {
      aspect-ratio: 16/9;
      width: 100%;
      object-fit: cover;
    }

    .story-content {
      padding: 2rem;
    }

    .story-content h3 {
      font-size: 1.25rem;
      margin-bottom: 0.85rem;
      color: var(--primary);
    }

    .story-content p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块七：关键效能数据条 */
    .metrics-bar-section {
      background: var(--primary);
      color: #FFFFFF;
      padding: 3.5rem 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }

    .metric-stat-num {
      font-size: clamp(2rem, 3.5vw, 3rem);
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 0.35rem;
    }

    .metric-stat-label {
      font-size: 0.875rem;
      color: #94A3B8;
      font-weight: 500;
    }

    /* 板块八：客户口碑评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-text {
      font-size: 0.9375rem;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 1.5rem;
      font-style: italic;
    }

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

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

    .author-meta strong {
      display: block;
      font-size: 0.9375rem;
      color: var(--primary);
    }

    .author-meta span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块九：行业资讯前沿 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

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

    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 0.85rem;
    }

    .news-card h3 {
      font-size: 1.15rem;
      margin-bottom: 0.75rem;
      line-height: 1.4;
      color: var(--primary);
    }

    .news-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }

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

    /* 板块十：FAQ 常见问答 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 1rem;
      background: #FFFFFF;
      overflow: hidden;
    }

    .faq-toggle {
      width: 100%;
      text-align: left;
      padding: 1.25rem 1.5rem;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-icon {
      transition: transform 0.2s ease;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .faq-content {
      padding: 0 1.5rem 1.25rem;
      color: var(--text-muted);
      font-size: 0.9375rem;
      line-height: 1.65;
      display: none;
    }

    .faq-item.active .faq-content {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* 板块十一：技术保障与合规 */
    .compliance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .compliance-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 1.5rem;
      text-align: center;
    }

    .compliance-card strong {
      display: block;
      font-size: 1.1rem;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }

    .compliance-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块十二：收口转化表单区 */
    .contact-card-box {
      max-width: 820px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      box-shadow: var(--shadow-card);
    }

    .lead-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.25rem;
      margin-top: 2rem;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-control {
      width: 100%;
      padding: 0.85rem 1rem;
      border: 1px solid rgba(15, 23, 42, 0.15);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      color: var(--primary);
      outline: none;
      transition: var(--transition);
      background: #F8FAFC;
    }

    .form-control:focus {
      border-color: var(--accent-blue);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 页脚 */
    .site-footer {
      background: var(--primary-dark);
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 1.25rem;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 0.65rem;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 移动端与响应式适配 */
    @media (max-width: 1024px) {
      .hero-content, .overview-grid, .dark-inner, .story-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .features-grid, .product-cards-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-btn-box {
        display: none;
      }
      .features-grid, .product-cards-grid, .news-grid, .testimonial-grid, .metrics-grid, .compliance-grid {
        grid-template-columns: 1fr;
      }
      .lead-form {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .contact-card-box {
        padding: 2rem 1.25rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
      }
    }