/* roulang page: index */
:root {
      --bg-dark: #070B19;
      --bg-deep: #0B132B;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-card: rgba(56, 189, 248, 0.22);
      --primary-blue: #2563EB;
      --cyan-glow: #06B6D4;
      --sky-glow: #38BDF8;
      --green-glow: #10B981;
      --text-white: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-deep) 100%);
      color: var(--text-white);
      line-height: 1.65;
      overflow-x: hidden;
      min-width: 320px;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.2) 0%, rgba(7, 11, 25, 0.6) 75%);
      border-top: 1px solid rgba(56, 189, 248, 0.1);
      border-bottom: 1px solid rgba(56, 189, 248, 0.1);
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px auto;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
      background: rgba(6, 182, 212, 0.12);
      color: var(--cyan-glow);
      border: 1px solid rgba(6, 182, 212, 0.3);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #FFFFFF 30%, var(--sky-glow) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.025rem;
      line-height: 1.7;
    }
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(56, 189, 248, 0.45);
      box-shadow: 0 12px 30px rgba(6, 182, 212, 0.15);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 10px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      outline: none;
      white-space: nowrap;
    }
    .btn-glow {
      background: linear-gradient(135deg, #0284C7 0%, var(--cyan-glow) 100%);
      color: #FFFFFF;
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
    }
    .btn-glow:hover {
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: rgba(15, 23, 42, 0.6);
      color: var(--sky-glow);
      border: 1px solid rgba(56, 189, 248, 0.45);
    }
    .btn-outline:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: var(--sky-glow);
      color: #FFFFFF;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(7, 11, 25, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(56, 189, 248, 0.18);
    }
    .top-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.8rem;
      padding: 7px 0;
      color: var(--text-muted);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .pulse-dot {
      width: 7px;
      height: 7px;
      background-color: var(--green-glow);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--green-glow);
      animation: pulseAnim 2s infinite;
    }
    @keyframes pulseAnim {
      0% { opacity: 0.4; }
      50% { opacity: 1; transform: scale(1.15); }
      100% { opacity: 0.4; }
    }
    .main-nav {
      padding: 14px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.45rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #FFFFFF;
    }
    .brand-glow-tag {
      background: linear-gradient(135deg, var(--cyan-glow), var(--primary-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.92rem;
      color: var(--text-muted);
      transition: var(--transition);
      position: relative;
      font-weight: 500;
    }
    .nav-link:hover {
      color: var(--sky-glow);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid rgba(56, 189, 248, 0.3);
      color: var(--text-white);
      padding: 8px 12px;
      border-radius: 8px;
      font-size: 1.25rem;
      cursor: pointer;
    }

    /* 板块 1: Hero */
    .hero-section {
      position: relative;
      min-height: 88vh;
      display: flex;
      align-items: center;
      padding: 70px 0 60px 0;
      background-image: linear-gradient(to bottom, rgba(7, 11, 25, 0.85), rgba(11, 19, 43, 0.95)), url('/assets/images/349a086b64d88384.jpg');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-badge-wrap {
      display: flex;
      gap: 12px;
      margin-bottom: 20px;
      flex-wrap: wrap;
    }
    .hero-tag {
      background: rgba(16, 185, 129, 0.15);
      border: 1px solid rgba(16, 185, 129, 0.4);
      color: #34D399;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .hero-tag-promo {
      background: linear-gradient(90deg, #F59E0B, #EF4444);
      color: #FFFFFF;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
      box-shadow: 0 0 14px rgba(239, 68, 68, 0.4);
    }
    .hero-title {
      font-size: 3.1rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--sky-glow) 0%, #60A5FA 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.08rem;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-features-strip {
      display: flex;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    .hero-features-strip span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-console-card {
      padding: 28px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(56, 189, 248, 0.35);
      background: rgba(11, 20, 48, 0.85);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    }
    .console-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 14px;
      border-bottom: 1px solid rgba(56, 189, 248, 0.15);
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-r { background: #EF4444; }
    .dot-y { background: #F59E0B; }
    .dot-g { background: #10B981; }
    .console-row {
      display: flex;
      justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.875rem;
    }
    .console-key { color: var(--text-muted); }
    .console-val { color: var(--sky-glow); font-family: monospace; font-weight: 600; }

    /* 板块 2: 指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .metric-card {
      padding: 26px;
      text-align: center;
      background: linear-gradient(180deg, rgba(15, 23, 42, 0.8) 0%, rgba(11, 22, 53, 0.6) 100%);
      border: 1px solid rgba(56, 189, 248, 0.2);
    }
    .metric-num {
      font-size: 2.85rem;
      font-weight: 800;
      font-family: Inter, sans-serif;
      color: #FFFFFF;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }
    .metric-num span { color: var(--cyan-glow); font-size: 1.7rem; }
    .metric-label {
      font-size: 1rem;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 板块 3: 底层架构 */
    .arch-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .arch-layer-card {
      padding: 20px;
      margin-bottom: 16px;
      border-left: 4px solid var(--cyan-glow);
    }
    .arch-layer-card:last-child { margin-bottom: 0; }
    .arch-layer-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--sky-glow);
    }
    .arch-layer-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .arch-spec-box {
      padding: 30px;
      border-radius: var(--radius-md);
      background: rgba(13, 27, 62, 0.6);
      border: 1px solid rgba(6, 182, 212, 0.3);
    }
    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 20px;
    }
    .spec-item:last-child { margin-bottom: 0; }
    .spec-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: rgba(6, 182, 212, 0.2);
      color: var(--cyan-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 700;
    }
    .spec-text h4 { font-size: 1rem; color: #FFFFFF; margin-bottom: 4px; }
    .spec-text p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

    /* 板块 4: 核心技术优势 */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      padding: 28px;
    }
    .adv-num {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--cyan-glow);
      opacity: 0.8;
      margin-bottom: 14px;
    }
    .adv-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .adv-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 5: 产品矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .prod-card {
      padding: 34px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .prod-card.featured {
      border: 2px solid var(--cyan-glow);
      background: linear-gradient(180deg, rgba(14, 40, 80, 0.85) 0%, rgba(11, 22, 53, 0.8) 100%);
      transform: translateY(-8px);
      box-shadow: 0 16px 40px rgba(6, 182, 212, 0.25);
    }
    .prod-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: linear-gradient(135deg, #0284C7, var(--cyan-glow));
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 12px;
    }
    .prod-name {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #FFFFFF;
    }
    .prod-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 40px;
    }
    .prod-features {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
    }
    .prod-features li {
      font-size: 0.85rem;
      color: #CBD5E1;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .prod-features li::before {
      content: "✓";
      color: var(--cyan-glow);
      font-weight: bold;
    }

    /* 板块 6: 结果对比 */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .comp-col {
      padding: 32px;
      border-radius: var(--radius-md);
    }
    .comp-col.legacy {
      background: rgba(30, 20, 30, 0.6);
      border: 1px solid rgba(239, 68, 68, 0.3);
    }
    .comp-col.cloud {
      background: rgba(10, 35, 45, 0.65);
      border: 1px solid rgba(16, 185, 129, 0.45);
      box-shadow: 0 0 25px rgba(16, 185, 129, 0.1);
    }
    .comp-head {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 22px;
      padding-bottom: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .comp-head h3 { font-size: 1.25rem; font-weight: 700; }
    .comp-list { list-style: none; }
    .comp-list li {
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.9rem;
      line-height: 1.6;
    }
    .legacy .comp-list li { color: #FDA4AF; }
    .cloud .comp-list li { color: #A7F3D0; }

    /* 板块 7: 实战案例 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .case-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-img-wrap {
      position: relative;
      height: 240px;
      overflow: hidden;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .case-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(7, 11, 25, 0.85);
      border: 1px solid var(--border-card);
      color: var(--cyan-glow);
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 6px;
      backdrop-filter: blur(8px);
    }
    .case-body {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #FFFFFF;
    }
    .case-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 18px;
      line-height: 1.65;
    }
    .case-stats {
      display: flex;
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 14px;
    }
    .case-stat-item strong {
      display: block;
      color: var(--sky-glow);
      font-size: 1.15rem;
    }
    .case-stat-item span {
      font-size: 0.75rem;
      color: var(--text-dim);
    }

    /* 板块 8: 标杆应用故事 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .story-card {
      padding: 30px;
      border-left: 3px solid var(--sky-glow);
    }
    .story-badge {
      display: inline-block;
      font-size: 0.75rem;
      color: #38BDF8;
      background: rgba(56, 189, 248, 0.12);
      padding: 2px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .story-title {
      font-size: 1.18rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #FFFFFF;
    }
    .story-content {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .story-meta {
      font-size: 0.8rem;
      color: var(--text-dim);
      display: flex;
      justify-content: space-between;
      border-top: 1px dashed rgba(255, 255, 255, 0.1);
      padding-top: 12px;
    }

    /* 板块 9: 里程碑时间轴 */
    .timeline-wrap {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px 0;
    }
    .timeline-wrap::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: linear-gradient(180deg, var(--cyan-glow), rgba(56, 189, 248, 0.1));
      transform: translateX(-50%);
    }
    .timeline-item {
      position: relative;
      width: 50%;
      padding: 16px 36px;
      box-sizing: border-box;
    }
    .timeline-item.left {
      left: 0;
      text-align: right;
    }
    .timeline-item.right {
      left: 50%;
      text-align: left;
    }
    .timeline-dot {
      position: absolute;
      top: 24px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--cyan-glow);
      box-shadow: 0 0 10px var(--cyan-glow);
    }
    .timeline-item.left .timeline-dot { right: -7px; }
    .timeline-item.right .timeline-dot { left: -7px; }
    .timeline-box {
      padding: 20px;
    }
    .timeline-date {
      font-size: 0.85rem;
      color: var(--cyan-glow);
      font-weight: 700;
      margin-bottom: 6px;
    }
    .timeline-heading {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #FFFFFF;
    }
    .timeline-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块 10: 客户评价 */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 0.9rem;
      letter-spacing: 2px;
      margin-bottom: 14px;
    }
    .testi-quote {
      font-size: 0.9rem;
      color: #E2E8F0;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 14px;
    }
    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue), var(--cyan-glow));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #FFF;
      font-size: 0.85rem;
    }
    .testi-info h5 {
      font-size: 0.9rem;
      color: #FFFFFF;
    }
    .testi-info p {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 板块 11: 资讯列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-thumb {
      height: 180px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.06);
    }
    .news-content {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: var(--text-dim);
      margin-bottom: 10px;
    }
    .news-heading {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-excerpt {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.85rem;
      color: var(--cyan-glow);
      font-weight: 600;
      align-self: flex-start;
    }

    /* 板块 12: 安全保障 */
    .sec-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .sec-card {
      padding: 26px 20px;
      text-align: center;
      background: linear-gradient(180deg, rgba(16, 27, 56, 0.7) 0%, rgba(8, 14, 32, 0.8) 100%);
    }
    .sec-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px auto;
      border-radius: 12px;
      background: rgba(6, 182, 212, 0.15);
      border: 1px solid rgba(6, 182, 212, 0.35);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--cyan-glow);
    }
    .sec-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #FFFFFF;
    }
    .sec-desc {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块 13: 场景快速解答 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 22px;
    }
    .scenario-card {
      padding: 24px;
      border-radius: var(--radius-md);
      background: rgba(14, 25, 52, 0.65);
      border: 1px solid rgba(56, 189, 248, 0.2);
    }
    .scenario-q {
      font-size: 1.025rem;
      font-weight: 700;
      color: var(--sky-glow);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .scenario-a {
      font-size: 0.875rem;
      color: #CBD5E1;
      line-height: 1.65;
    }

    /* 板块 14: FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      margin-bottom: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(56, 189, 248, 0.2);
      background: rgba(15, 23, 42, 0.7);
      overflow: hidden;
    }
    .faq-toggle {
      width: 100%;
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: none;
      border: none;
      color: #FFFFFF;
      font-size: 1.025rem;
      font-weight: 600;
      text-align: left;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-toggle:hover {
      background: rgba(56, 189, 248, 0.08);
      color: var(--sky-glow);
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--cyan-glow);
      transition: transform 0.3s ease;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      background: rgba(11, 19, 43, 0.4);
    }
    .faq-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
      padding-bottom: 20px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-content {
      max-height: 240px;
      padding-top: 6px;
    }

    /* 板块 15: 转化表单 */
    .contact-wrapper {
      max-width: 1080px;
      margin: 0 auto;
      border-radius: var(--radius-lg);
      padding: 44px;
      background: linear-gradient(135deg, rgba(16, 28, 64, 0.9) 0%, rgba(8, 14, 32, 0.95) 100%);
      border: 1px solid rgba(6, 182, 212, 0.4);
      box-shadow: 0 0 50px rgba(6, 182, 212, 0.2);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: center;
    }
    .contact-info h3 {
      font-size: 1.85rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .contact-info p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .contact-highlights {
      list-style: none;
    }
    .contact-highlights li {
      font-size: 0.88rem;
      color: #CBD5E1;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.82rem;
      font-weight: 600;
      color: #CBD5E1;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: rgba(15, 23, 42, 0.7);
      border: 1px solid rgba(56, 189, 248, 0.3);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 0.9rem;
      transition: var(--transition);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--cyan-glow);
      box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 85px;
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 1.05rem;
      margin-top: 8px;
    }

    /* 页脚 */
    .site-footer {
      background: #040711;
      border-top: 1px solid rgba(56, 189, 248, 0.2);
      padding: 60px 0 25px 0;
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 45px;
    }
    .footer-brand h4 {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      color: var(--text-dim);
      line-height: 1.7;
      font-size: 0.82rem;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      transition: var(--transition);
      font-size: 0.82rem;
    }
    .footer-links a:hover {
      color: var(--sky-glow);
    }
    .footer-trust p {
      color: var(--text-dim);
      font-size: 0.8rem;
      line-height: 1.6;
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      color: var(--text-dim);
      font-size: 0.8rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .adv-grid { grid-template-columns: repeat(2, 1fr); }
      .product-grid { grid-template-columns: 1fr; }
      .prod-card.featured { transform: none; }
      .sec-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .timeline-wrap::before { left: 24px; }
      .timeline-item { width: 100%; padding-left: 60px; text-align: left !important; }
      .timeline-item.right { left: 0; }
      .timeline-item.left .timeline-dot, .timeline-item.right .timeline-dot { left: 17px; }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-cta .btn { display: none; }
      .menu-toggle { display: block; }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(7, 11, 25, 0.98);
        padding: 24px;
        border-bottom: 1px solid rgba(56, 189, 248, 0.3);
        gap: 16px;
      }
      .arch-layout { grid-template-columns: 1fr; }
      .compare-container { grid-template-columns: 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .story-grid { grid-template-columns: 1fr; }
      .testi-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .scenario-grid { grid-template-columns: 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
      .contact-wrapper { padding: 26px; }
      .form-row { grid-template-columns: 1fr; }
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 1.75rem; }
      .top-bar { display: none; }
    }
    @media (max-width: 520px) {
      .metrics-grid { grid-template-columns: 1fr; }
      .adv-grid { grid-template-columns: 1fr; }
      .sec-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .section-wrap { padding: 60px 0; }
    }