/* roulang page: index */
:root {
      --primary: #00E599;
      --primary-hover: #00c784;
      --navy: #0A1128;
      --navy-deep: #060B19;
      --navy-card: #0F1A3A;
      --data-blue: #0075FF;
      --action-orange: #FF5E36;
      --bg-light: #F4F7FB;
      --bg-white: #FFFFFF;
      --text-dark: #1D2939;
      --text-muted: #667085;
      --text-light: #F8FAFC;
      --text-dim: #94A3B8;
      --border-light: rgba(226, 232, 240, 0.85);
      --border-dark: rgba(255, 255, 255, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-sm: 0 4px 16px -2px rgba(10, 17, 40, 0.05);
      --shadow-hover: 0 14px 34px -4px rgba(0, 229, 153, 0.18);
      --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
      --font-num: "DIN Alternate", Roboto, "Helvetica Neue", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    body {
      font-family: var(--font-main);
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

    button, input, select {
      font-family: inherit;
      outline: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: #040813;
      color: var(--text-dim);
      font-size: 0.85rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-links {
      display: flex;
      gap: 20px;
    }

    .header-main {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 17, 40, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
      transition: background-color 0.3s ease;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--data-blue));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #060B19;
      font-weight: 800;
      font-size: 1.1rem;
    }
    .logo-text {
      color: #FFFFFF;
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-link {
      color: #E2E8F0;
      font-size: 0.95rem;
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      border: none;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #060B19;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(0, 229, 153, 0.4);
    }
    .btn-secondary {
      background: rgba(255, 255, 255, 0.08);
      color: #FFFFFF;
      border: 1px solid var(--border-dark);
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.15);
      transform: translateY(-2px);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: #FFFFFF;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 板块通用规范 */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: rgba(0, 229, 153, 0.1);
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid rgba(0, 229, 153, 0.25);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .dark-section {
      background-color: var(--navy-deep);
      color: #FFFFFF;
    }
    .dark-section .section-title {
      color: #FFFFFF;
    }
    .dark-section .section-desc {
      color: var(--text-dim);
    }

    /* Section 1: Hero（根据蓝图：预约接入/到店，服务卖点+时段选择视觉+CTA） */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(0, 117, 255, 0.15), transparent 50%),
                  linear-gradient(180deg, var(--navy-deep) 0%, var(--navy) 100%);
      color: #FFFFFF;
      padding: 100px 0 120px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }
    .hero-content h1 span {
      background: linear-gradient(90deg, #FFFFFF, var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-dim);
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .hero-card-panel {
      background: rgba(15, 26, 58, 0.85);
      border: 1px solid rgba(0, 229, 153, 0.3);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .panel-header {
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }
    .panel-header h3 {
      font-size: 1.25rem;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .panel-header p {
      font-size: 0.85rem;
      color: var(--text-dim);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      color: var(--text-dim);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      background: rgba(6, 11, 25, 0.7);
      border: 1px solid var(--border-dark);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 0.95rem;
    }
    .time-slot-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
      margin-top: 8px;
    }
    .slot-item {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 8px 4px;
      text-align: center;
      font-size: 0.8rem;
      color: var(--text-dim);
      cursor: pointer;
      transition: all 0.2s;
    }
    .slot-item.active, .slot-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 229, 153, 0.08);
    }

    /* Section 2: 产品价值矩阵 */
    .value-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .value-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .value-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .value-icon {
      width: 52px;
      height: 52px;
      background: rgba(0, 229, 153, 0.12);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .value-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--navy);
    }
    .value-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 3: 功能展示 */
    .function-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .function-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .function-card-img {
      height: 180px;
      position: relative;
      overflow: hidden;
    }
    .function-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .function-card:hover .function-card-img img {
      transform: scale(1.05);
    }
    .function-card-body {
      padding: 24px;
    }
    .function-chip {
      font-size: 0.75rem;
      background: rgba(0, 117, 255, 0.1);
      color: var(--data-blue);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
      margin-bottom: 8px;
      display: inline-block;
    }
    .function-card-body h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--navy);
    }
    .function-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 4: 架构理念与技术底座 */
    .arch-layer-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 36px;
    }
    .arch-layer {
      background: var(--navy-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 20px 24px;
      display: grid;
      grid-template-columns: 200px 1fr;
      align-items: center;
      gap: 20px;
    }
    .layer-title {
      font-weight: 700;
      color: var(--primary);
      font-size: 1.05rem;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
      padding-right: 16px;
    }
    .layer-desc {
      font-size: 0.92rem;
      color: var(--text-dim);
    }

    /* Section 5: 三步上手 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      position: relative;
    }
    .step-num {
      font-family: var(--font-num);
      font-size: 3rem;
      font-weight: 800;
      color: rgba(0, 229, 153, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--navy);
    }
    .step-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* Section 6: 多端入口与生态互通 */
    .clients-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .client-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: all 0.25s;
    }
    .client-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .client-icon {
      font-size: 2.2rem;
      color: var(--data-blue);
      margin-bottom: 12px;
    }
    .client-card h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
      color: var(--navy);
    }
    .client-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Section 7: 运营核心数据 */
    .metric-section {
      background: #040813;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
      padding: 60px 0;
    }
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-val {
      font-family: var(--font-num);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-dim);
    }

    /* Section 8: 落地场景比对 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .scenario-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .scenario-card h3 {
      font-size: 1.3rem;
      color: var(--navy);
      margin-bottom: 16px;
    }
    .metric-compare {
      display: flex;
      gap: 16px;
      margin-top: 16px;
      background: var(--bg-light);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .compare-item span {
      display: block;
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .compare-item strong {
      font-size: 1.1rem;
      color: var(--navy);
    }

    /* Section 9: 评价墙 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-bubble {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .stars {
      color: #FFB800;
      margin-bottom: 10px;
    }
    .review-bubble p {
      font-size: 0.92rem;
      color: var(--text-dark);
      margin-bottom: 16px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-info h5 {
      font-size: 0.9rem;
      color: var(--navy);
    }
    .reviewer-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Section 10: 软硬件系统要求与支持规格 */
    .spec-table-wrap {
      background: var(--navy-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      color: #FFFFFF;
      font-size: 0.92rem;
    }
    .spec-table th, .spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .spec-table th {
      background: rgba(0, 0, 0, 0.3);
      color: var(--primary);
    }

    /* Section 11: 数字化资讯与前沿动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-item {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .news-img {
      height: 160px;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 20px;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .news-body h3 {
      font-size: 1.05rem;
      margin-bottom: 10px;
      color: var(--navy);
      line-height: 1.4;
    }
    .news-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 12: 常见问题 FAQ（手风琴） */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      color: var(--navy);
      background: #FFFFFF;
      transition: background-color 0.2s;
    }
    .faq-question:hover {
      background-color: #F8FAFC;
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FAFCFE;
      border-top: 1px solid transparent;
    }
    .faq-item.active .faq-answer {
      border-top-color: var(--border-light);
    }
    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 13: 方案预约与行动收口 */
    .cta-banner {
      background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 100%);
      border: 1px solid rgba(0, 229, 153, 0.3);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .cta-text h2 {
      font-size: 2rem;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .cta-text p {
      font-size: 1rem;
      color: var(--text-dim);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .cta-form-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-dark);
      padding: 24px;
      border-radius: var(--radius-md);
    }

    /* 底部合规与页脚 */
    .site-footer {
      background-color: #040813;
      color: #94A3B8;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.15rem;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-brand p {
      line-height: 1.8;
      font-size: 0.88rem;
      margin-bottom: 16px;
      color: #64748B;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a:hover {
      color: var(--primary);
    }
    .compliance-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.8rem;
      color: #475569;
    }
    .cert-badges {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    .cert-tag {
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      color: #64748B;
      font-size: 0.75rem;
    }

    /* 移动端响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .cta-banner {
        grid-template-columns: 1fr;
      }
      .value-grid, .function-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .clients-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-links {
        display: none;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: #0A1128;
        flex-direction: column;
        padding: 40px 24px;
        gap: 20px;
        transition: left 0.3s ease;
      }
      .nav-menu.open {
        left: 0;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-actions .btn {
        display: none;
      }
      .value-grid, .function-grid, .steps-grid, .clients-grid, .scenario-grid, .reviews-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .section-wrap {
        padding: 60px 0;
      }
      .arch-layer {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .layer-title {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 8px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }