/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-dark: #0A2540;
      --primary-light: #EBF3FE;
      --accent-teal: #00D4B2;
      --accent-orange: #FF6B35;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-page: #FFFFFF;
      --bg-alt: #F8FAFC;
      --border-color: #E2E8F0;
      --card-shadow: 0 4px 20px -2px rgba(15, 82, 186, 0.06);
      --card-shadow-hover: 0 14px 30px -4px rgba(15, 82, 186, 0.14);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.28s ease;
      --container-max: 1200px;
    }

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

    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-body);
      line-height: 1.6;
      font-size: 15px;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部通栏信息条与导航 */
    .top-bar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 12.5px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-bar a:hover {
      color: #FFFFFF;
    }

    header.main-header {
      position: sticky;
      top: 0;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      z-index: 1000;
      box-shadow: 0 2px 12px rgba(15, 23, 42, 0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary), var(--accent-teal));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 900;
      font-size: 16px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 24px;
    }
    .nav-link {
      font-size: 14.5px;
      font-weight: 600;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .btn-demo {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--primary);
      color: #FFFFFF;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
      transition: var(--transition);
      border: 1px solid transparent;
      cursor: pointer;
    }
    .btn-demo:hover {
      background-color: #0c4399;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(15, 82, 186, 0.35);
    }

    /* 通用Section配置 */
    section {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-alt);
    }
    .section-dark {
      background-color: var(--primary-dark);
      color: #F8FAFC;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }
    .section-tag-light {
      background: rgba(0, 212, 178, 0.15);
      color: var(--accent-teal);
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-subtitle {
      font-size: 15.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .section-dark .section-subtitle {
      color: #94A3B8;
    }

    /* 1. Hero 蓝图：图标矩阵 + 状态条 + 短标题（无大图首屏） */
    .hero-section {
      padding: 60px 0 80px;
      background: linear-gradient(180deg, #F1F6FE 0%, #FFFFFF 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-status-strip {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #FFFFFF;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      border: 1px solid #D6E4FC;
      box-shadow: 0 2px 8px rgba(15, 82, 186, 0.08);
      margin-bottom: 24px;
      font-size: 13px;
      color: var(--text-body);
      font-weight: 500;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-teal);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 212, 178, 0.25);
    }
    .hero-main-title {
      font-size: 44px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.2;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }
    .hero-main-title span {
      color: var(--primary);
    }
    .hero-description {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.75;
      max-width: 880px;
      margin: 0 auto 40px;
    }
    .hero-icon-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      text-align: left;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #B9D5FD;
    }
    .matrix-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary);
      opacity: 0;
      transition: var(--transition);
    }
    .matrix-card:hover::before {
      opacity: 1;
    }
    .matrix-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .matrix-card h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .matrix-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 2. 已上线能力 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }
    .feature-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-3px);
    }
    .feature-badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      font-size: 11.5px;
      font-weight: 700;
      background: #DCFCE7;
      color: #166534;
      margin-bottom: 14px;
    }
    .feature-card h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 进行中能力 */
    .wip-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .wip-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--card-shadow);
      position: relative;
    }
    .wip-progress-bar {
      height: 6px;
      background: #E2E8F0;
      border-radius: var(--radius-full);
      margin: 16px 0 10px;
      overflow: hidden;
    }
    .wip-progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), var(--accent-teal));
      border-radius: var(--radius-full);
    }
    .wip-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12.5px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 4. 规划中路线 */
    .roadmap-timeline {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      position: relative;
    }
    .roadmap-item {
      background: #FFFFFF;
      border: 1px dashed #CBD5E1;
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
    }
    .roadmap-phase {
      font-size: 12px;
      font-weight: 800;
      color: var(--accent-orange);
      text-transform: uppercase;
      margin-bottom: 8px;
      letter-spacing: 0.5px;
    }
    .roadmap-item h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .roadmap-item p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 5. 核心架构中枢 */
    .engine-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }
    .engine-node {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: var(--transition);
    }
    .engine-node:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--accent-teal);
    }
    .engine-step {
      font-size: 12px;
      font-weight: 800;
      color: var(--accent-teal);
      margin-bottom: 8px;
    }
    .engine-node h3 {
      font-size: 16.5px;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .engine-node p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 6. 场景落地方案 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .scenario-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .scenario-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .scenario-box:hover .scenario-img-wrap img {
      transform: scale(1.04);
    }
    .scenario-content {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .scenario-content h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .scenario-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .scenario-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }
    .scenario-tags span {
      background: var(--bg-alt);
      color: var(--primary-dark);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid #E2E8F0;
    }

    /* 7. 直播预告与实时演示看点 */
    .live-preview-box {
      background: #0A192F;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 36px;
      color: #FFF;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 107, 53, 0.2);
      color: var(--accent-orange);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 16px;
      border: 1px solid rgba(255, 107, 53, 0.3);
    }
    .live-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-orange);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.4; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.4; transform: scale(0.9); }
    }
    .live-title {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .live-desc {
      font-size: 14.5px;
      color: #94A3B8;
      line-height: 1.65;
      margin-bottom: 24px;
    }
    .countdown-timer {
      display: flex;
      gap: 14px;
    }
    .time-slot {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 12px 18px;
      text-align: center;
      min-width: 68px;
    }
    .time-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent-teal);
      line-height: 1;
    }
    .time-lbl {
      font-size: 11px;
      color: #94A3B8;
      margin-top: 4px;
      text-transform: uppercase;
    }
    .live-points {
      background: rgba(255, 255, 255, 0.04);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .live-points h4 {
      font-size: 15px;
      color: #E2E8F0;
      margin-bottom: 14px;
    }
    .live-points ul {
      list-style: none;
    }
    .live-points li {
      position: relative;
      padding-left: 20px;
      font-size: 13.5px;
      color: #CBD5E1;
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .live-points li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--accent-teal);
      font-weight: 900;
    }

    /* 8. 转化与前后对比 (Before / After) */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .compare-column {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 34px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .compare-column.is-pro {
      border-color: #B9D5FD;
      background: linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%);
      box-shadow: 0 10px 30px -4px rgba(15, 82, 186, 0.12);
      position: relative;
    }
    .compare-header {
      padding-bottom: 20px;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-header h3 {
      font-size: 20px;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .compare-list {
      list-style: none;
    }
    .compare-list li {
      padding: 12px 0;
      border-bottom: 1px dashed #E2E8F0;
      font-size: 14px;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .compare-list li:last-child {
      border-bottom: none;
    }
    .compare-icon-bad {
      color: #EF4444;
      font-weight: 700;
    }
    .compare-icon-good {
      color: #10B981;
      font-weight: 700;
    }

    /* 9. 关键数据指标条 */
    .metrics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: var(--primary-dark);
      padding: 44px 36px;
      border-radius: var(--radius-lg);
      color: #FFFFFF;
    }
    .metric-cell {
      text-align: center;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
    }
    .metric-cell:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 38px;
      font-weight: 900;
      color: var(--accent-teal);
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 13.5px;
      color: #94A3B8;
      font-weight: 500;
    }

    /* 10. 用户故事与落地实录 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .case-org {
      font-size: 12.5px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .case-card h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .case-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .case-stat-badge {
      margin-top: auto;
      background: #F1F6FE;
      padding: 10px 14px;
      border-radius: var(--radius-md);
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
      border: 1px solid #D6E4FC;
    }

    /* 11. 更新日志与版本演进 */
    .changelog-wrapper {
      max-width: 860px;
      margin: 0 auto;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      padding: 36px;
    }
    .changelog-entry {
      position: relative;
      padding-left: 30px;
      padding-bottom: 30px;
      border-left: 2px solid #E2E8F0;
    }
    .changelog-entry:last-child {
      padding-bottom: 0;
      border-left-color: transparent;
    }
    .changelog-dot {
      position: absolute;
      left: -7px;
      top: 0;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary);
      border: 2px solid #FFFFFF;
    }
    .changelog-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 8px;
    }
    .changelog-ver {
      font-size: 15px;
      font-weight: 800;
      color: var(--primary);
    }
    .changelog-date {
      font-size: 12.5px;
      color: var(--text-muted);
    }
    .changelog-entry p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 12. 资讯证据与技术研报 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .insight-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .insight-img-wrap {
      height: 180px;
      overflow: hidden;
    }
    .insight-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .insight-card:hover .insight-img-wrap img {
      transform: scale(1.05);
    }
    .insight-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .insight-body h3 {
      font-size: 16.5px;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .insight-link {
      margin-top: auto;
      font-size: 13.5px;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 13. 异议拆解 (Accordion / FAQ) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(15, 82, 186, 0.03);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #FFFFFF;
      transition: var(--transition);
    }
    .faq-question:hover {
      background-color: var(--bg-alt);
      color: var(--primary);
    }
    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.28s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.65;
      border-top: 1px solid var(--bg-alt);
      background: #FAFCFE;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 14. 技术保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--card-shadow);
    }
    .guarantee-symbol {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin: 0 auto 14px;
    }
    .guarantee-card h4 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .guarantee-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 15. 订阅更新与转化收口 */
    .convert-block {
      background: linear-gradient(135deg, var(--primary-dark) 0%, #153E75 100%);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .convert-left h2 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .convert-left p {
      font-size: 14.5px;
      color: #CBD5E1;
      line-height: 1.6;
    }
    .convert-form {
      background: #FFFFFF;
      padding: 28px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      height: 42px;
      padding: 8px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
    }
    .form-submit-btn {
      width: 100%;
      height: 44px;
      background: var(--primary);
      color: #FFF;
      font-weight: 700;
      font-size: 15px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }
    .form-submit-btn:hover {
      background: #0c4399;
    }

    /* 页脚 */
    footer.main-footer {
      background: #06152B;
      color: #94A3B8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13.5px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 12px;
      font-weight: 800;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.65;
      color: #64748B;
    }
    .footer-col h4 {
      font-size: 14.5px;
      color: #FFFFFF;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12.5px;
      color: #64748B;
    }

    /* 移动端固定底栏 */
    .mobile-fixed-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 56px;
      background: #FFFFFF;
      box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
      z-index: 999;
      border-top: 1px solid var(--border-color);
      padding: 0 16px;
    }
    .mobile-bar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 12px;
    }
    .mobile-btn {
      flex: 1;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 13.5px;
      font-weight: 700;
      border-radius: var(--radius-sm);
    }
    .mobile-btn-phone {
      background: var(--bg-alt);
      color: var(--primary-dark);
      border: 1px solid var(--border-color);
    }
    .mobile-btn-demo {
      background: var(--primary);
      color: #FFFFFF;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-icon-matrix, .engine-flow, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-strip {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 30px;
      }
      .metric-cell:nth-child(2) {
        border-right: none;
      }
      .roadmap-timeline {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .hero-main-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .feature-grid-3, .wip-grid, .scenario-grid, .insights-grid, .case-grid, .compare-container, .convert-block, .live-preview-box {
        grid-template-columns: 1fr;
      }
      .metrics-strip {
        grid-template-columns: 1fr;
      }
      .metric-cell {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 20px;
      }
      .metric-cell:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
      .mobile-fixed-bar {
        display: block;
      }
      body {
        padding-bottom: 56px;
      }
      section {
        padding: 55px 0;
      }
    }