/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #1E40AF;
      --accent: #0284C7;
      --accent-light: #E0F2FE;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B132B;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 8px rgba(15, 82, 186, 0.04);
      --shadow-card: 0 4px 20px -2px rgba(15, 82, 186, 0.06);
      --shadow-hover: 0 12px 30px -4px rgba(15, 82, 186, 0.12);
      --container-max: 1200px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-muted);
      background-color: var(--bg-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

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

    /* 顶部服务栏 */
    .top-utility-bar {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 6px 0;
    }
    .top-utility-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-links span {
      margin-right: 20px;
    }
    .top-links span i {
      color: var(--accent);
      margin-right: 6px;
    }

    /* 固顶主导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main);
    }
    .brand-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 1.1rem;
    }
    .brand-logo-text span {
      color: var(--primary);
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
    }
    .nav-item a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 0;
      position: relative;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .nav-item a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    .nav-item a:hover::after {
      width: 100%;
    }
    .nav-cta-btn {
      background: var(--primary);
      color: #fff !important;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.875rem;
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.2);
    }
    .nav-cta-btn:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }

    /* Section 通用规范 */
    .section-block {
      padding: 96px 0;
      position: relative;
    }
    .section-bg-white {
      background-color: var(--bg-white);
    }
    .section-bg-slate {
      background-color: var(--bg-main);
    }
    .section-bg-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }
    .section-header {
      margin-bottom: 56px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--primary);
      background: var(--accent-light);
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
    }
    .section-bg-dark .section-tag {
      background: rgba(2, 132, 199, 0.2);
      color: #38BDF8;
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    .section-bg-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-light);
      line-height: 1.7;
    }
    .section-bg-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块一：Hero Section (5:7 斜向错位) */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 70px 0 90px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #EFF6FF;
      color: var(--primary);
      border: 1px solid #BFDBFE;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
    }
    .hero-title {
      font-size: 2.75rem;
      line-height: 1.22;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }
    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #FFFFFF;
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(15, 82, 186, 0.25);
      transition: var(--transition);
      min-height: 48px;
    }
    .btn-main:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(15, 82, 186, 0.35);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #FFFFFF;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      min-height: 48px;
    }
    .btn-secondary:hover {
      background: #F8FAFC;
      border-color: #CBD5E1;
      color: var(--primary);
    }
    .hero-kpis {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .hero-kpi-item h4 {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .hero-kpi-item p {
      font-size: 0.8125rem;
      color: var(--text-light);
    }
    .hero-visual-stage {
      position: relative;
    }
    .hero-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.18);
      border: 1px solid rgba(255,255,255,0.8);
      transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
      transition: var(--transition);
    }
    .hero-image-wrap:hover {
      transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
    }
    .hero-float-card {
      position: absolute;
      bottom: -20px;
      left: -20px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 16px 20px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.12);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 14px;
      z-index: 2;
    }
    .hero-float-icon {
      width: 44px;
      height: 44px;
      background: #DCFCE7;
      color: #16A34A;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      border-radius: 50%;
    }
    .hero-float-text h5 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .hero-float-text p {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 板块二：卖点三连速览条 */
    .selling-trio-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .trio-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .trio-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }
    .trio-icon-box {
      width: 52px;
      height: 52px;
      background: #EFF6FF;
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .trio-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .trio-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块三：痛点剖析与破局 */
    .painpoint-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .painpoint-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 36px;
      border-left: 4px solid #EF4444;
      box-shadow: var(--shadow-card);
    }
    .painpoint-card.solution-style {
      border-left-color: #10B981;
    }
    .painpoint-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: #DC2626;
      background: #FEE2E2;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }
    .solution-style .painpoint-badge {
      color: #059669;
      background: #D1FAE5;
    }
    .painpoint-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .painpoint-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块四：核心架构与技术参数 */
    .service-arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .arch-specs-list {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-spec-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: var(--bg-white);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }
    .arch-spec-dot {
      width: 20px;
      height: 20px;
      background: #DCFCE7;
      color: #16A34A;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .arch-spec-content h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .arch-spec-content p {
      font-size: 0.875rem;
      color: var(--text-light);
      line-height: 1.5;
    }

    /* 板块五：核心优势矩阵 (3x2 布局) */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
    }
    .advantage-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #93C5FD;
    }
    .adv-icon {
      font-size: 1.8rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .advantage-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .advantage-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块六：场景化热门产品区 */
    .solution-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .solution-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .solution-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .solution-tag-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--primary);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 999px;
      z-index: 2;
    }
    .solution-card-img {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .solution-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .solution-card:hover .solution-card-img img {
      transform: scale(1.05);
    }
    .solution-card-body {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-card-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .solution-card-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      flex-grow: 1;
      line-height: 1.6;
    }
    .solution-link-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 18px;
      background: #EFF6FF;
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid #BFDBFE;
    }
    .solution-link-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    /* 板块七：深色对比案例与理念区 */
    .dark-section-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .dark-quote-box {
      border-left: 3px solid var(--accent);
      padding-left: 24px;
      margin-bottom: 32px;
    }
    .dark-quote-box p {
      font-size: 1.25rem;
      line-height: 1.7;
      color: #E2E8F0;
      font-weight: 500;
    }
    .dark-metric-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 32px;
      backdrop-filter: blur(8px);
    }
    .dark-stat-row {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding: 16px 0;
    }
    .dark-stat-row:last-child {
      border-bottom: none;
    }
    .dark-stat-label {
      color: #94A3B8;
      font-size: 0.9375rem;
    }
    .dark-stat-val {
      color: #38BDF8;
      font-weight: 700;
      font-size: 1.125rem;
    }

    /* 板块八：用户故事与场景演示区 */
    .stories-timeline {
      display: flex;
      flex-direction: column;
      gap: 32px;
      position: relative;
    }
    .story-card {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 32px;
      background: var(--bg-white);
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
    }
    .story-meta {
      display: flex;
      flex-direction: column;
      justify-content: center;
      border-right: 1px solid var(--border-color);
      padding-right: 20px;
    }
    .story-meta .story-step {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 4px;
    }
    .story-meta .story-tag {
      font-size: 1.125rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .story-content h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .story-content p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块九：关键数据成果统计条 */
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metrics-item {
      text-align: center;
      background: var(--bg-white);
      padding: 36px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .metrics-num {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 10px;
      letter-spacing: -0.03em;
    }
    .metrics-label {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .metrics-sub {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 板块十：社会认同与用户评价区 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .testimonial-quote {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }
    .user-avatar-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .user-info h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .user-info p {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 板块十一：行业对比差异化视窗 */
    .compare-table-wrapper {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F1F5F9;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table th.highlight-col {
      background: #EFF6FF;
      color: var(--primary);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.dim-text {
      color: var(--text-light);
      font-size: 0.9375rem;
    }
    .compare-table td.strong-text {
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.9375rem;
      background: #F8FAFC;
    }
    .compare-table td.primary-strong {
      color: var(--primary);
      font-weight: 700;
      background: #F0F7FF;
      font-size: 0.9375rem;
    }

    /* 板块十二：动态资讯与营销洞察 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .insight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .insight-card-img {
      height: 180px;
      overflow: hidden;
    }
    .insight-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.8125rem;
      color: var(--text-light);
      margin-bottom: 12px;
    }
    .insight-category {
      color: var(--accent);
      font-weight: 600;
    }
    .insight-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 板块十三：交互式 FAQ 手风琴区 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: #BFDBFE;
    }
    .faq-header {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
      border-top: 1px solid #F1F5F9;
      margin-top: 4px;
      padding-top: 16px;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 板块十四：服务保障与履约承诺条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      box-shadow: var(--shadow-sm);
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .guarantee-text p {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    /* 板块十五：底部强转化行动表单区 */
    .conversion-box {
      background: linear-gradient(135deg, #0F52BA 0%, #1E3A8A 100%);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      color: #FFFFFF;
      box-shadow: 0 20px 40px rgba(15, 82, 186, 0.25);
    }
    .conversion-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .conversion-info h2 {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .conversion-info p {
      font-size: 1.0625rem;
      color: #BFDBFE;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .conversion-perks {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .conversion-perks li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9375rem;
      color: #EFF6FF;
    }
    .conversion-form-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      color: var(--text-main);
      transition: var(--transition);
      background: #F8FAFC;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: #0284C7;
      color: #FFFFFF;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      background: #0369A1;
      transform: translateY(-1px);
    }

    /* 悬浮固底转化条 */
    .sticky-floating-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 19, 43, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding: 12px 0;
      z-index: 999;
      box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
    }
    .floating-bar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .floating-left {
      display: flex;
      align-items: center;
      gap: 16px;
      color: #FFFFFF;
    }
    .floating-badge {
      background: var(--accent);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
    }
    .floating-title {
      font-size: 0.9375rem;
      font-weight: 600;
    }
    .floating-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .floating-phone {
      color: #38BDF8;
      font-weight: 700;
      font-size: 0.9375rem;
    }

    /* 页脚 */
    .site-footer {
      background: #090F1E;
      color: #94A3B8;
      padding: 80px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      line-height: 1.6;
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

    /* 移动端汉堡切换与抽屉 */
    .nav-toggle-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .service-arch-grid, .dark-section-grid, .conversion-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-visual-stage {
        order: -1;
      }
      .advantage-grid, .solution-cards-grid, .testimonial-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar-grid, .guarantee-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }
    }

    @media (max-width: 768px) {
      .top-utility-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 16px;
      }
      .nav-menu.show {
        display: flex;
      }
      .nav-cta-btn {
        display: none;
      }
      .nav-toggle-btn {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .section-block {
        padding: 56px 0;
      }
      .selling-trio-grid, .painpoint-grid, .advantage-grid, .solution-cards-grid, .testimonial-grid, .insights-grid, .metrics-bar-grid, .guarantee-bar {
        grid-template-columns: 1fr;
      }
      .story-card {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .story-meta {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
        padding-right: 0;
      }
      .floating-title {
        display: none;
      }
      .conversion-box {
        padding: 36px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }