/* roulang page: index */
:root {
      --primary: #1D3B3A;
      --primary-dark: #112322;
      --primary-light: #2A5351;
      --accent: #F07A38;
      --accent-hover: #D86524;
      --bg-main: #F8FAF9;
      --bg-white: #FFFFFF;
      --text-main: #121816;
      --text-muted: #404B47;
      --text-light: #7E8D88;
      --border-color: #E2E8E5;
      --card-shadow: 0 4px 20px -2px rgba(18, 24, 22, 0.06);
      --card-shadow-hover: 0 12px 28px -4px rgba(18, 24, 22, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --max-width: 1200px;
    }

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

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

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -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-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: var(--primary-dark);
      color: #A3B5B1;
      font-size: 12px;
      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-bar-links span {
      margin-right: 18px;
    }

    .header-main {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: var(--primary);
      color: #fff;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 900;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 2px;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .header-cta-btn {
      background-color: var(--accent);
      color: #fff;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      display: inline-block;
    }
    .header-cta-btn:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(240, 122, 56, 0.3);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 通用板块规范 */
    .section {
      padding: 80px 0;
    }
    .section-alt {
      background-color: var(--bg-white);
    }
    .section-dark {
      background-color: var(--primary-dark);
      color: #fff;
    }
    .section-header {
      margin-bottom: 48px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      background: rgba(240, 122, 56, 0.1);
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 12px;
    }
    .section-tag.tag-light {
      background: rgba(255, 255, 255, 0.15);
      color: #FFAE78;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .section-dark .section-title {
      color: #fff;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #B4C5C0;
    }

    /* 板块 1: Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(rgba(17, 35, 34, 0.82), rgba(29, 59, 58, 0.88)), url('/assets/images/1fec7482ba288362.webp') center/cover no-repeat;
      padding: 100px 0 110px 0;
      color: #fff;
      overflow: hidden;
    }
    .hero-content {
      max-width: 840px;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      margin-bottom: 24px;
      color: #F8FAF9;
    }
    .hero-title {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 18px;
      line-height: 1.8;
      color: #D3E0DC;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-main {
      background-color: var(--accent);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      display: inline-block;
    }
    .btn-main:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 14px rgba(240, 122, 56, 0.4);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 600;
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.2);
    }

    /* 板块 2: 系统架构与概览 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
    }
    .arch-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      background: #fff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .arch-badge {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      background: rgba(29, 59, 58, 0.08);
      color: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
    }
    .arch-item-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .arch-item-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 3: 六大核心技术优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #fff;
      padding: 32px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #CAD5D1;
    }
    .feature-icon-bar {
      width: 48px;
      height: 48px;
      background: rgba(29, 59, 58, 0.06);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 18px;
    }
    .feature-card-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .feature-card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 4: 热门硬件与系统单品 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .product-img-box {
      height: 220px;
      overflow: hidden;
      background: #ECEFEF;
    }
    .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(1.04);
    }
    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .product-specs {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 12px;
      padding-bottom: 12px;
      border-bottom: 1px dashed var(--border-color);
    }
    .product-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex: 1;
      line-height: 1.6;
    }
    .product-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块 5: 深色沉浸式实景演练 */
    .scene-box {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 32px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .scene-nav {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .scene-btn {
      text-align: left;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: #D3E0DC;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      transition: all 0.25s ease;
    }
    .scene-btn.active, .scene-btn:hover {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }
    .scene-display {
      background: rgba(0, 0, 0, 0.25);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .scene-display-title {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
    }
    .scene-flow {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 16px;
    }
    .flow-node {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: #CAD5D1;
    }
    .flow-bullet {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
    }

    /* 板块 6: 改造路径与全宅实施故事 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #fff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      position: relative;
    }
    .step-number {
      font-size: 28px;
      font-weight: 800;
      color: rgba(29, 59, 58, 0.15);
      margin-bottom: 12px;
    }
    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 7: 数据统计条 */
    .metrics-bar {
      background: var(--primary);
      color: #fff;
      padding: 50px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-value {
      font-size: 38px;
      font-weight: 800;
      color: #FFAE78;
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 14px;
      color: #D3E0DC;
    }

    /* 板块 8: 真实反馈 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #fff;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .review-stars {
      color: #FFB800;
      margin-bottom: 12px;
      font-size: 16px;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      background: var(--primary-light);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }
    .reviewer-title {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 板块 9: 行业动态与技术资讯摘要 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .news-img {
      height: 180px;
      background: #CAD5D1;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 6px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
      line-height: 1.4;
    }
    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 10: 对比矩阵 */
    .compare-table-wrap {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--card-shadow);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #F2F5F4;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table th.highlight {
      background: rgba(29, 59, 58, 0.08);
      color: var(--primary);
    }
    .compare-table td.highlight {
      background: rgba(29, 59, 58, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块 11: 服务保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-card {
      background: #fff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--card-shadow);
    }
    .guarantee-icon {
      font-size: 28px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .guarantee-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .guarantee-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 12: FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: '+';
      font-size: 20px;
      font-weight: 700;
      color: var(--accent);
    }
    .faq-item.active .faq-question::after {
      content: '−';
    }
    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 板块 13: 方案定制与预约 */
    .form-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #fff;
      padding: 44px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow-hover);
    }
    .form-info-title {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--primary);
    }
    .form-info-text {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .form-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border 0.2s;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--accent);
    }
    .form-btn {
      width: 100%;
      background: var(--accent);
      color: #fff;
      border: none;
      padding: 14px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .form-btn:hover {
      background: var(--accent-hover);
    }

    /* 板块 14: 生态合作伙伴 */
    .partners-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      align-items: center;
    }
    .partner-brand {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px 10px;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      color: #5C6B66;
    }

    /* 页脚 */
    .footer {
      background-color: var(--primary-dark);
      color: #8DA19C;
      padding: 60px 0 30px 0;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand-title {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .footer-desc {
      font-size: 13px;
      line-height: 1.7;
      color: #A3B5B1;
    }
    .footer-heading {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-link a:hover {
      color: #fff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
      color: #6C827C;
    }
    .footer-bottom p {
      margin-bottom: 6px;
    }

    /* 浮动转化条 */
    .floating-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(17, 35, 34, 0.95);
      backdrop-filter: blur(8px);
      color: #fff;
      padding: 12px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      z-index: 999;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.15);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .floating-text {
      font-size: 14px;
      font-weight: 500;
    }
    .floating-cta {
      background: var(--accent);
      color: #fff;
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
    }
    .floating-cta:hover {
      background: var(--accent-hover);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 38px; }
      .features-grid, .products-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partners-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .mobile-toggle { display: block; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-menu.show { display: flex; }
      .header-cta-btn { display: none; }
      .hero-title { font-size: 30px; }
      .hero-subtitle { font-size: 15px; }
      .arch-grid, .form-container, .scene-box {
        grid-template-columns: 1fr;
      }
      .features-grid, .products-grid, .reviews-grid, .news-grid, .timeline-steps, .guarantee-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .partners-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .floating-text {
        font-size: 12px;
      }
    }