/* roulang page: index */
:root {
      --primary: #165DFF;
      --primary-hover: #0E42D2;
      --secondary: #00D2A0;
      --accent: #FF7D00;
      --dark-slate: #0F172A;
      --dark-navy: #1E293B;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-page: #F7F9FC;
      --bg-white: #FFFFFF;
      --bg-alt: #EEF2F6;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-card: 0 4px 12px -2px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 12px 24px -4px rgba(22, 93, 255, 0.14);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.7;
      overflow-x: hidden;
      -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-family: inherit;
      outline: none;
    }

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

    /* 顶部双行导航 */
    .top-bar {
      background-color: var(--dark-slate);
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      z-index: 101;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 38px;
    }
    .top-bar-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--secondary);
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--secondary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--secondary);
    }
    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .main-nav-wrapper {
      position: sticky;
      top: 0;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      z-index: 100;
      box-shadow: var(--shadow-sm);
    }
    .main-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      letter-spacing: -0.02em;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 1.1rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-item a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .nav-item a.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-item a.active::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 10px 20px;
      font-size: 0.9375rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #fff;
      box-shadow: 0 4px 10px rgba(22, 93, 255, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 14px rgba(22, 93, 255, 0.35);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--dark-slate);
      background-color: #fff;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(22, 93, 255, 0.04);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      filter: brightness(1.08);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 6px 14px;
      font-size: 0.8125rem;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--dark-slate);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      background-color: rgba(22, 93, 255, 0.1);
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.center {
      text-align: center;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
      margin-bottom: 48px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--dark-slate);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. 首屏多维展示区 (杂志分栏首屏) */
    .hero-section {
      padding: 60px 0 80px;
      background: radial-gradient(100% 80% at 50% 0%, #FFFFFF 0%, #EEF4FD 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-magazine-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-lead-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--dark-slate);
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }
    .hero-lead-h1 span {
      background: linear-gradient(120deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead-desc {
      font-size: 1.0625rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-spec-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid rgba(15, 23, 42, 0.08);
    }
    .spec-item {
      display: flex;
      flex-direction: column;
    }
    .spec-num {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      font-variant-numeric: tabular-nums;
    }
    .spec-label {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .hero-feature-card {
      background-color: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      position: relative;
    }
    .hero-card-img-wrap {
      position: relative;
      height: 280px;
      overflow: hidden;
    }
    .hero-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .hero-card-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(15, 23, 42, 0.8);
      color: #fff;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      backdrop-filter: blur(4px);
    }
    .hero-card-body {
      padding: 24px;
    }
    .hero-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 10px;
    }
    .hero-card-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 2. 品牌与技术架构底座介绍区 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .arch-media {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-color);
    }
    .arch-badge-float {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background-color: #fff;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-hover);
      border-left: 4px solid var(--primary);
    }
    .arch-badge-float h5 {
      font-size: 0.875rem;
      color: var(--dark-slate);
      font-weight: 700;
    }
    .arch-badge-float p {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .arch-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .arch-item-num {
      flex-shrink: 0;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background-color: rgba(22, 93, 255, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.875rem;
    }
    .arch-item-content h4 {
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--dark-slate);
      margin-bottom: 4px;
    }
    .arch-item-content p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 指标看板区 */
    .metrics-section {
      background-color: var(--dark-slate);
      color: #fff;
      padding: 70px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      transition: var(--transition);
    }
    .metric-card:hover {
      background: rgba(255, 255, 255, 0.08);
      transform: translateY(-4px);
    }
    .metric-val {
      font-size: 2.5rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 6px;
      font-variant-numeric: tabular-nums;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }
    .metric-val span.unit {
      font-size: 1.125rem;
      font-weight: 500;
      color: var(--secondary);
    }
    .metric-title {
      font-size: 0.9375rem;
      color: #94A3B8;
      margin-bottom: 10px;
    }
    .metric-tag {
      display: inline-block;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: var(--radius-pill);
      background: rgba(0, 210, 160, 0.15);
      color: var(--secondary);
    }

    /* 4. 核心能力优势矩阵 (6卡网格) */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }
    .advantage-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .adv-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, rgba(22, 93, 255, 0.1) 0%, rgba(0, 210, 160, 0.1) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 20px;
    }
    .advantage-card h3 {
      font-size: 1.1875rem;
      color: var(--dark-slate);
      margin-bottom: 12px;
      font-weight: 600;
    }
    .advantage-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 5. 热门应用与产品矩阵 (3卡并列) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .prod-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .prod-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .prod-img-wrap {
      height: 200px;
      overflow: hidden;
      background-color: var(--bg-alt);
    }
    .prod-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .prod-card:hover .prod-img-wrap img {
      transform: scale(1.05);
    }
    .prod-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .prod-meta {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
    }
    .prod-badge {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: var(--bg-alt);
      color: var(--text-muted);
      font-weight: 500;
    }
    .prod-badge.active-badge {
      background: rgba(22, 93, 255, 0.1);
      color: var(--primary);
    }
    .prod-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 10px;
    }
    .prod-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .prod-footer {
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .prod-stat {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .prod-stat strong {
      color: var(--dark-slate);
      font-size: 0.9375rem;
    }

    /* 6. 全链路服务闭环流程 */
    .pipeline-wrapper {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-card);
    }
    .pipeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .pipeline-step {
      position: relative;
      padding-top: 12px;
    }
    .step-num-bar {
      display: flex;
      align-items: center;
      margin-bottom: 16px;
    }
    .step-circle {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background-color: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9375rem;
      flex-shrink: 0;
      box-shadow: 0 0 0 6px rgba(22, 93, 255, 0.15);
    }
    .step-line {
      flex-grow: 1;
      height: 2px;
      background-color: var(--border-color);
      margin-left: 12px;
    }
    .pipeline-step:last-child .step-line {
      display: none;
    }
    .step-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 7. 深色专业案例与核心理念区 */
    .dark-concept-section {
      background-color: var(--dark-slate);
      color: #fff;
      padding: 90px 0;
    }
    .concept-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
    }
    .concept-img-frame {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .concept-tag {
      background: rgba(0, 210, 160, 0.12);
      color: var(--secondary);
    }
    .concept-title {
      font-size: 2.125rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 18px;
      color: #fff;
    }
    .concept-p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .concept-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }
    .c-point {
      border-left: 2px solid var(--secondary);
      padding-left: 14px;
    }
    .c-point h5 {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 4px;
    }
    .c-point p {
      font-size: 0.875rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 8. 典型场景结果对比区 (Before & After) */
    .benchmark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .bm-card {
      background-color: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 36px 30px;
      box-shadow: var(--shadow-card);
    }
    .bm-card.highlight {
      border: 2px solid var(--primary);
      position: relative;
    }
    .bm-card-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background-color: var(--primary);
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      font-weight: 600;
    }
    .bm-header {
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
    }
    .bm-header h3 {
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 6px;
    }
    .bm-header p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .bm-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.9375rem;
    }
    .bm-row:last-child {
      border-bottom: none;
    }
    .bm-label {
      color: var(--text-body);
    }
    .bm-val {
      font-weight: 700;
      font-variant-numeric: tabular-nums;
    }
    .val-negative {
      color: #EF4444;
    }
    .val-positive {
      color: var(--secondary);
    }

    /* 9. 关键数据统计条 (Milestone Counters) */
    .milestone-section {
      background: linear-gradient(90deg, #165DFF 0%, #0E42D2 100%);
      color: #fff;
      padding: 50px 0;
    }
    .milestone-flex {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 30px;
    }
    .milestone-item {
      text-align: center;
    }
    .ms-num {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 4px;
      font-variant-numeric: tabular-nums;
    }
    .ms-txt {
      font-size: 0.9375rem;
      color: rgba(255, 255, 255, 0.8);
    }

    /* 10. 用户与客户故事区 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .story-img {
      height: 220px;
      overflow: hidden;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content {
      padding: 28px;
    }
    .story-cat {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
      text-transform: uppercase;
    }
    .story-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .story-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .story-kpi {
      display: flex;
      gap: 20px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
    }
    .kpi-unit strong {
      display: block;
      font-size: 1.125rem;
      color: var(--dark-slate);
    }
    .kpi-unit span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 11. 用户与专家评价墙 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .t-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .t-quote {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }
    .t-stars {
      color: #F59E0B;
      font-size: 0.875rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .t-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .t-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-alt);
      overflow: hidden;
      flex-shrink: 0;
    }
    .t-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .t-info h5 {
      font-size: 0.9375rem;
      color: var(--dark-slate);
      font-weight: 600;
    }
    .t-info p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 12. 新闻与行业数字化动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-bottom: 36px;
    }
    .news-card {
      background-color: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--dark-slate);
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .news-excerpt {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .news-action-wrap {
      text-align: center;
    }

    /* 13. 平台合规保障与高可用承诺 */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .sec-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
    }
    .sec-icon {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: rgba(22, 93, 255, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .sec-card h4 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--dark-slate);
      margin-bottom: 8px;
    }
    .sec-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 14. 常见疑问快速解答 (FAQ 手风琴) */
    .faq-accordion-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.0625rem;
      color: var(--dark-slate);
      user-select: none;
      list-style: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-arrow {
      width: 18px;
      height: 18px;
      transition: transform 0.25s ease;
      display: inline-block;
      text-align: center;
      line-height: 18px;
      color: var(--text-muted);
    }
    details[open] .faq-arrow {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid rgba(0, 0, 0, 0.04);
    }

    /* 15. 底部高转化咨询与注册表单 */
    .cta-conversion-section {
      background: linear-gradient(135deg, var(--dark-slate) 0%, var(--dark-navy) 100%);
      color: #fff;
      padding: 90px 0;
    }
    .conversion-box {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
    }
    .cta-info h3 {
      font-size: 2.125rem;
      font-weight: 700;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-info p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .support-hotline-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-sm);
      padding: 20px;
    }
    .support-hotline-card p {
      margin-bottom: 6px;
      font-size: 0.875rem;
      color: #94A3B8;
    }
    .support-hotline-card strong {
      font-size: 1.375rem;
      color: var(--secondary);
    }
    .form-panel {
      background-color: #fff;
      border-radius: var(--radius-md);
      padding: 36px 32px;
      color: var(--dark-slate);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .form-panel h4 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--dark-slate);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-body);
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      color: var(--dark-slate);
      transition: var(--transition);
      background-color: #FAFAFA;
    }
    .form-control:focus {
      border-color: var(--primary);
      background-color: #fff;
      box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.15);
    }
    select.form-control {
      appearance: none;
      background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
      background-repeat: no-repeat;
      background-position: right 14px center;
      background-size: 16px;
    }
    textarea.form-control {
      height: 90px;
      padding-top: 10px;
      resize: vertical;
    }

    /* 页脚 */
    .site-footer {
      background-color: #090E1A;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 0.9fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .footer-col h5 {
      font-size: 0.9375rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #fff;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-magazine-grid,
      .arch-grid,
      .concept-grid,
      .conversion-box {
        grid-template-columns: 1fr;
      }
      .advantages-grid,
      .products-grid,
      .news-grid,
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pipeline-steps {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .pipeline-step:nth-child(2) .step-line {
        display: none;
      }
      .metrics-grid,
      .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-card);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-lead-h1 {
        font-size: 2.125rem;
      }
      .advantages-grid,
      .products-grid,
      .news-grid,
      .testimonials-grid,
      .benchmark-grid,
      .stories-grid,
      .pipeline-steps,
      .security-grid {
        grid-template-columns: 1fr;
      }
      .step-line {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 60px 0;
      }
    }