/* roulang page: index */
:root {
      --primary: #0F4C81;
      --brand-accent: #0070F3;
      --secondary: #4A5568;
      --highlight: #059669;
      --bg-light: #F8FAFC;
      --surface: #FFFFFF;
      --dark-block: #0B192C;
      --border-color: #E2E8F0;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --shadow-sm: 0 4px 20px rgba(15, 76, 129, 0.05);
      --shadow-hover: 0 12px 32px rgba(15, 76, 129, 0.12);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .top-bar {
      background-color: #EEF4FA;
      border-bottom: 1px solid #E2E8F0;
      font-size: 13px;
      color: var(--secondary);
      height: 36px;
      display: flex;
      align-items: center;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .badge-status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--highlight);
      font-weight: 600;
    }
    .badge-status::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--highlight);
      border-radius: 50%;
      box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
    }

    .main-nav {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--brand-accent), var(--primary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 4px 10px rgba(0,112,243,0.3);
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--brand-accent);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(15, 76, 129, 0.2);
    }

    .btn-primary:hover {
      background: #0C3C66;
      box-shadow: 0 6px 18px rgba(15, 76, 129, 0.3);
      transform: translateY(-1px);
    }

    .btn-accent {
      background: var(--brand-accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 112, 243, 0.25);
    }

    .btn-accent:hover {
      background: #0058C6;
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(15, 76, 129, 0.04);
    }

    /* 板块通用 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }
    .section-block.bg-alt {
      background-color: #FFFFFF;
      border-top: 1px solid #EDF2F7;
      border-bottom: 1px solid #EDF2F7;
    }
    .section-block.bg-dark {
      background-color: var(--dark-block);
      color: #FFFFFF;
    }

    .section-header {
      margin-bottom: 48px;
    }
    .section-header.center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--brand-accent);
      background: rgba(0, 112, 243, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .section-tag.light {
      background: rgba(255, 255, 255, 0.15);
      color: #93C5FD;
    }

    .section-title {
      font-size: 28px;
      font-weight: 800;
      line-height: 1.35;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .section-title.white {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 15px;
      line-height: 1.7;
      color: var(--secondary);
    }
    .section-desc.white {
      color: #94A3B8;
    }

    /* 1. 首屏产品截图舞台 (Hero) */
    .hero-stage {
      position: relative;
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #EBF4FC 0%, var(--bg-light) 70%);
      overflow: hidden;
      border-bottom: 1px solid #E2E8F0;
    }

    .hero-stage-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid #D6E4F0;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    }

    .hero-h1 {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-intro {
      font-size: 16px;
      line-height: 1.8;
      color: var(--secondary);
      max-width: 780px;
      margin: 0 auto 32px;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 48px;
    }
    .hero-cta-group .btn {
      padding: 14px 32px;
      font-size: 15px;
    }

    .hero-screen-stage {
      position: relative;
      max-width: 1040px;
      margin: 0 auto;
      border-radius: 16px;
      background: #FFFFFF;
      padding: 12px;
      box-shadow: 0 24px 60px rgba(15, 76, 129, 0.15);
      border: 1px solid #CBD5E1;
    }

    .hero-screen-inner {
      position: relative;
      border-radius: 12px;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      background: #0B192C;
    }

    .hero-screen-inner img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hero-stage-flair {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: rgba(11, 25, 44, 0.75);
      backdrop-filter: blur(8px);
      padding: 18px 30px;
      border-radius: 50px;
      border: 1px solid rgba(255,255,255,0.2);
      color: #fff;
      display: flex;
      align-items: center;
      gap: 16px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    }
    .hero-stage-flair .dot {
      width: 12px;
      height: 12px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 10px #10B981;
    }

    /* 2. 成果数据条 (KPI条) */
    .metrics-bar-section {
      padding: 40px 0;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-card {
      padding: 16px 20px;
      border-right: 1px solid var(--border-color);
    }
    .metric-card:last-child {
      border-right: none;
    }
    .metric-num {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-num span {
      font-size: 20px;
      color: var(--brand-accent);
      font-weight: 700;
    }
    .metric-label {
      font-size: 14px;
      color: var(--secondary);
      font-weight: 600;
    }

    /* 3. 卖点三连卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #B9D5ED;
    }
    .feature-icon-wrapper {
      width: 54px;
      height: 54px;
      background: rgba(0, 112, 243, 0.08);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      color: var(--brand-accent);
      font-size: 24px;
      font-weight: 800;
    }
    .feature-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 14px;
      line-height: 1.7;
      color: var(--secondary);
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .feature-point-list {
      list-style: none;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .feature-point-list li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-point-list li::before {
      content: "✓";
      color: var(--highlight);
      font-weight: 700;
    }

    /* 4. 工艺方法与底层架构 (图文交错) */
    .tech-split-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 60px;
    }
    .tech-split-row:last-child {
      margin-bottom: 0;
    }
    .tech-split-img {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .tech-badge-overlay {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(15, 76, 129, 0.9);
      color: #FFFFFF;
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      backdrop-filter: blur(4px);
    }
    .tech-step-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--brand-accent);
      text-transform: uppercase;
      margin-bottom: 8px;
      display: block;
    }
    .tech-spec-table {
      width: 100%;
      margin-top: 20px;
      border-collapse: collapse;
      font-size: 13px;
    }
    .tech-spec-table td {
      padding: 10px 12px;
      border: 1px solid var(--border-color);
    }
    .tech-spec-table td.spec-name {
      background: #F8FAFC;
      font-weight: 600;
      width: 35%;
      color: var(--primary);
    }

    /* 5. 六维优势矩阵区 */
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .matrix-card:hover {
      border-color: var(--brand-accent);
      transform: translateY(-3px);
    }
    .matrix-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }
    .matrix-tag-num {
      width: 34px;
      height: 34px;
      background: #EFF6FF;
      color: var(--brand-accent);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
    }
    .matrix-head h3 {
      font-size: 17px;
      color: var(--primary);
      font-weight: 700;
    }
    .matrix-card p {
      font-size: 14px;
      line-height: 1.65;
      color: var(--secondary);
    }

    /* 6. 深色商务夜色对比区块 */
    .dark-inner-box {
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-lg);
      padding: 48px;
      background: rgba(255,255,255,0.03);
    }
    .dark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .dark-list {
      list-style: none;
      margin-top: 24px;
    }
    .dark-list li {
      margin-bottom: 18px;
      padding-left: 28px;
      position: relative;
      font-size: 15px;
      color: #CBD5E1;
    }
    .dark-list li::before {
      content: "✦";
      position: absolute;
      left: 0;
      top: 0;
      color: #38BDF8;
      font-size: 16px;
    }
    .console-mock {
      background: #050B14;
      border: 1px solid #1E293B;
      border-radius: 8px;
      padding: 24px;
      font-family: monospace;
      font-size: 13px;
      line-height: 1.6;
      color: #38BDF8;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .console-mock .log-green { color: #10B981; }
    .console-mock .log-yellow { color: #F59E0B; }
    .console-mock .log-white { color: #F8FAFC; }

    /* 7. 品类落地实战场景 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scene-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .scene-card-img {
      height: 160px;
      overflow: hidden;
    }
    .scene-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .scene-card:hover .scene-card-img img {
      transform: scale(1.05);
    }
    .scene-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .scene-body h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .scene-body p {
      font-size: 13px;
      color: var(--secondary);
      line-height: 1.6;
      margin-bottom: 12px;
      flex-grow: 1;
    }
    .scene-stat-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--highlight);
      background: #ECFDF5;
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
      align-self: flex-start;
    }

    /* 8. 节日战役与版本促销 */
    .campaign-banner {
      background: linear-gradient(135deg, #0F4C81 0%, #1A365D 100%);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #fff;
      display: grid;
      grid-template-columns: 3fr 2fr;
      gap: 40px;
      align-items: center;
    }
    .campaign-badge {
      background: #F59E0B;
      color: #000;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 4px;
      font-size: 12px;
      text-transform: uppercase;
      display: inline-block;
      margin-bottom: 16px;
    }
    .campaign-title {
      font-size: 28px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .campaign-desc {
      font-size: 15px;
      color: #E2E8F0;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .campaign-right-card {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .campaign-right-card h4 {
      font-size: 16px;
      margin-bottom: 14px;
      color: #93C5FD;
    }
    .countdown-bar {
      display: flex;
      gap: 12px;
      margin-bottom: 18px;
    }
    .countdown-unit {
      background: rgba(0, 0, 0, 0.3);
      padding: 10px 14px;
      border-radius: 6px;
      text-align: center;
      flex: 1;
    }
    .countdown-unit .val {
      font-size: 22px;
      font-weight: 800;
      color: #F8FAFC;
    }
    .countdown-unit .lbl {
      font-size: 11px;
      color: #94A3B8;
    }

    /* 9. 研运一体深度案例故事 */
    .case-story-block {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .case-story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .case-metric-pills {
      display: flex;
      gap: 16px;
      margin: 24px 0;
    }
    .case-pill {
      background: #F1F5F9;
      border-left: 3px solid var(--brand-accent);
      padding: 10px 16px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .case-pill-val {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .case-pill-txt {
      font-size: 12px;
      color: var(--secondary);
    }

    /* 10. 用户评价与客户信赖 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display:flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 14px;
      line-height: 1.7;
      color: var(--secondary);
      margin-bottom: 20px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }
    .reviewer-info h4 {
      font-size: 14px;
      color: var(--primary);
      font-weight: 700;
    }
    .reviewer-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 11. 行业洞察与技术资讯 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .insight-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .insight-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }
    .insight-meta span.tag {
      background: #EFF6FF;
      color: var(--brand-accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .insight-title {
      font-size: 18px;
      color: var(--primary);
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 12px;
    }
    .insight-desc {
      font-size: 14px;
      line-height: 1.65;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    .insight-expand-btn {
      background: none;
      border: none;
      color: var(--brand-accent);
      font-weight: 700;
      font-size: 13px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 0;
    }
    .insight-detail-panel {
      display: none;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px dashed var(--border-color);
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-muted);
    }

    /* 12. 异议拆解 FAQ 手风琴 */
    .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;
      transition: border-color 0.2s ease;
    }
    .faq-item.active {
      border-color: var(--brand-accent);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--brand-accent);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #FAFCFF;
    }
    .faq-answer-inner {
      padding: 0 24px 22px;
      font-size: 14px;
      line-height: 1.75;
      color: var(--secondary);
    }

    /* 底部保障条 */
    .trust-strip {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 32px 0;
    }
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .trust-item {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .trust-icon {
      width: 42px;
      height: 42px;
      border-radius: 8px;
      background: #EFF6FF;
      color: var(--brand-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      flex-shrink: 0;
    }
    .trust-text h4 {
      font-size: 14px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 2px;
    }
    .trust-text p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 底部大转化 CTA 表单 */
    .bottom-cta-section {
      background: linear-gradient(180deg, #F8FAFC 0%, #EDF4FB 100%);
      padding: 90px 0;
    }
    .cta-card-wrapper {
      max-width: 900px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid #DCE6F1;
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: 0 16px 40px rgba(15, 76, 129, 0.08);
      text-align: center;
    }
    .cta-form {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
      margin-top: 32px;
      text-align: left;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
    }
    .form-input {
      width: 100%;
      height: 44px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 0 14px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus {
      border-color: var(--brand-accent);
      box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.1);
    }
    .form-btn-box {
      grid-column: span 2;
      margin-top: 10px;
    }
    .form-btn-box .btn {
      width: 100%;
      height: 48px;
      font-size: 16px;
    }

    /* 页脚 */
    .site-footer {
      background: #0B192C;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 底部浮动转化条 */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.98);
      border-top: 1px solid #CBD5E1;
      padding: 12px 24px;
      z-index: 990;
      box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }
    .sticky-bar.visible {
      transform: translateY(0);
    }
    .sticky-bar-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .sticky-bar-info strong {
      color: var(--primary);
      font-size: 14px;
    }
    .sticky-bar-info span {
      color: var(--text-muted);
      font-size: 13px;
    }

    /* 移动端汉堡与弹窗 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-3, .grid-2x3, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .metric-card {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 20px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .campaign-banner {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .menu-toggle { display: block; }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        display: none;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-action-btn { display: none; }
      .hero-h1 { font-size: 28px; }
      .section-title { font-size: 22px; }
      .grid-3, .grid-2x3, .reviews-grid, .insights-grid, .scene-grid {
        grid-template-columns: 1fr;
      }
      .tech-split-row, .dark-grid, .case-story-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .trust-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-form {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .form-btn-box {
        grid-column: span 1;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .sticky-bar-info span { display: none; }
    }

    @media (max-width: 480px) {
      .trust-grid {
        grid-template-columns: 1fr;
      }
      .hero-cta-group {
        flex-direction: column;
        width: 100%;
      }
      .hero-cta-group .btn {
        width: 100%;
      }
    }