/* roulang page: index */
:root {
      --primary: #0A2540;
      --primary-light: #163e69;
      --accent: #00D4B2;
      --accent-glow: #00F2FE;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0B132B;
      --border-color: rgba(226, 232, 240, 0.9);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-card: 0 10px 25px -4px rgba(10, 37, 64, 0.06);
      --shadow-hover: 0 20px 35px -6px rgba(10, 37, 64, 0.12);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    button, input, select, textarea {
      font: inherit;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .top-bar {
      background-color: #07192b;
      color: #94a3b8;
      font-size: 0.82rem;
      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;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-meta {
      display: flex;
      gap: 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--primary);
    }
    .brand-icon-badge {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary) 0%, #1e4a7a 100%);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(0, 212, 178, 0.25);
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 24px;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      padding: 6px 4px;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 44px;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--accent) 0%, #00b49f 100%);
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(0, 212, 178, 0.35);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #10f0cd 0%, #00cbb4 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 212, 178, 0.45);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(4px);
    }
    .btn-outline:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.2);
    }
    .btn-dark {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: var(--primary-light);
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--primary);
      cursor: pointer;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-dark {
      background: radial-gradient(circle at top right, #112340 0%, #080f1e 100%);
      color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(0, 212, 178, 0.12);
      border: 1px solid rgba(0, 212, 178, 0.25);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.15rem;
      line-height: 1.3;
      color: var(--primary);
      margin-bottom: 14px;
      font-weight: 800;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    /* 1. Hero 视频官网全宽遮罩 */
    .hero-video-box {
      position: relative;
      min-height: 580px;
      display: flex;
      align-items: center;
      background: #061325;
      overflow: hidden;
      color: #FFFFFF;
      padding: 60px 0;
    }
    .hero-bg-poster {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.28;
      filter: blur(1px);
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 20, 38, 0.75) 0%, rgba(6, 17, 34, 0.95) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 880px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 212, 178, 0.16);
      border: 1px solid rgba(0, 212, 178, 0.4);
      color: var(--accent-glow);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.85rem;
      line-height: 1.25;
      font-weight: 900;
      letter-spacing: -0.02em;
      margin-bottom: 22px;
      text-shadow: 0 4px 20px rgba(0,0,0,0.4);
    }
    .hero-lead {
      font-size: 1.15rem;
      line-height: 1.7;
      color: #cbd5e1;
      margin-bottom: 34px;
      text-align: justify;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-kpi-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(12px);
      padding: 18px 24px;
      border-radius: var(--radius-md);
      margin-top: 20px;
      text-align: left;
    }
    .kpi-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
    }
    .kpi-txt {
      font-size: 0.8rem;
      color: #94A3B8;
      margin-top: 4px;
    }
    /* 2. 传统客服痛点对比 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .pain-header {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .pain-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: #FEF2F2;
      color: #EF4444;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
    }
    .pain-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
    }
    .pain-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .pain-solution {
      background: #F0FDF4;
      border-left: 3px solid #22C55E;
      padding: 10px 14px;
      font-size: 0.88rem;
      color: #166534;
      font-weight: 500;
      border-radius: 0 4px 4px 0;
    }
    /* 3. 已上线核心能力 (6卡片) */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 212, 178, 0.4);
    }
    .feature-badge-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(10, 37, 64, 0.08) 0%, rgba(0, 212, 178, 0.15) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 1.18rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .feature-card p {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    /* 4. 进行中技术模块与架构认证 */
    .two-col-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .arch-specs-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 22px;
    }
    .spec-item:last-child {
      margin-bottom: 0;
    }
    .spec-bullet {
      background: var(--accent);
      color: var(--primary);
      width: 24px;
      height: 24px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 0.8rem;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .spec-content h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .spec-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .rounded-cover-img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-color);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    /* 5. 规划中与产品版本矩阵 (3卡片) */
    .edition-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .edition-card.featured {
      border-color: var(--accent);
      box-shadow: 0 12px 30px rgba(0, 212, 178, 0.18);
      transform: scale(1.02);
    }
    .featured-tag {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(90deg, #00D4B2, #009688);
      color: #0A2540;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 12px;
      text-transform: uppercase;
    }
    .edition-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .edition-summary {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 48px;
    }
    .edition-features {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
    }
    .edition-features li {
      font-size: 0.88rem;
      color: #334155;
      padding: 7px 0;
      border-bottom: 1px dashed #E2E8F0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    /* 6. 实施方法步骤 (4步) */
    .step-flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-node {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-index {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(10, 37, 64, 0.12);
      line-height: 1;
      margin-bottom: 10px;
    }
    .step-node h4 {
      font-size: 1.1rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-node p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    /* 7. 深色高光理念展示区 */
    .deep-tech-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .glow-terminal {
      background: #060B17;
      border: 1px solid rgba(0, 212, 178, 0.3);
      box-shadow: 0 0 30px rgba(0, 212, 178, 0.15);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: monospace;
      color: #94A3B8;
      font-size: 0.85rem;
      line-height: 1.7;
    }
    .terminal-header {
      display: flex;
      gap: 6px;
      margin-bottom: 16px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding-bottom: 10px;
    }
    .t-circle {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .tc-red { background: #ef4444; }
    .tc-yellow { background: #eab308; }
    .tc-green { background: #22c55e; }
    .t-accent { color: var(--accent); }
    /* 8. 成果与数据指标 */
    .metric-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 20px;
      box-shadow: var(--shadow-sm);
    }
    .metric-val {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #334155;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    /* 9. 客户故事与真实落地证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }
    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }
    .testi-meta h5 {
      font-size: 0.95rem;
      color: var(--primary);
      font-weight: 700;
    }
    .testi-meta p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    /* 10. 适用行业与场景矩阵 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .scenario-cover {
      height: 150px;
      width: 100%;
      object-fit: cover;
    }
    .scenario-body {
      padding: 20px;
    }
    .scenario-body h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .scenario-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    /* 11. 资讯动态与系统更新日志 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 8px;
      display: inline-block;
    }
    .news-card h4 {
      font-size: 1.12rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.88rem;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: #00B49F;
    }
    /* 12. 常见问题与转化收口表单 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto 50px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .cta-form-card {
      background: linear-gradient(135deg, #0A2540 0%, #07192B 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid rgba(0, 212, 178, 0.3);
      box-shadow: 0 20px 40px rgba(10, 37, 64, 0.2);
    }
    .cta-form-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .form-inputs-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-inputs-box .full-width {
      grid-column: span 2;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(255, 255, 255, 0.06);
      color: #FFFFFF;
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.12);
    }
    .form-control option {
      background: #0A2540;
      color: #FFFFFF;
    }
    /* 页脚 */
    .site-footer {
      background: #050c18;
      color: #94A3B8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      .cards-grid-3, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid, .step-flow-grid, .metric-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .two-col-layout, .deep-tech-box, .cta-form-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-kpi-bar {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .pain-grid, .cards-grid-3, .testimonial-grid, .news-grid, .scenario-grid, .step-flow-grid {
        grid-template-columns: 1fr;
      }
      .form-inputs-box {
        grid-template-columns: 1fr;
      }
      .form-inputs-box .full-width {
        grid-column: span 1;
      }
      .hero-kpi-bar {
        grid-template-columns: 1fr;
      }
      .edition-card.featured {
        transform: none;
      }
    }