/* roulang page: index */
:root {
      --bg-page: #0a0c10;
      --bg-card: #12161f;
      --bg-surface: #181d28;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-focus: #00e575;
      --accent: #00e575;
      --accent-cyan: #00d2b4;
      --text-main: #f3f4f6;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
      --font-mono: "DIN Alternate", "Inter", monospace, sans-serif;
      --max-width: 1240px;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition-smooth: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.7;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-smooth);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航 */
    .top-meta-bar {
      background: #06070a;
      border-bottom: 1px solid var(--border-color);
      font-size: 12px;
      color: var(--text-dim);
      padding: 6px 0;
    }
    .meta-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 12, 16, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .brand-badge {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 6px;
      border-radius: var(--radius-sm);
      background: rgba(0, 229, 117, 0.12);
      color: var(--accent);
      border: 1px solid rgba(0, 229, 117, 0.3);
      font-family: var(--font-mono);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition-smooth);
    }
    .btn-primary {
      background: var(--accent);
      color: #06070a;
    }
    .btn-primary:hover {
      background: #05ff84;
      transform: translateY(-2px);
      box-shadow: 0 4px 18px rgba(0, 229, 117, 0.35);
    }
    .btn-outline {
      background: transparent;
      color: #fff;
      border-color: var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(0, 229, 117, 0.05);
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background: #0d1017;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      max-width: 760px;
      margin: 0 auto 56px auto;
      text-align: center;
    }
    .section-eyebrow {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: #ffffff;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 1. Hero 蓝图设定：短视频竖屏感主视觉 + 跟买/了解 CTA */
    .hero-section {
      padding: 70px 0 100px 0;
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 117, 0.08) 0%, transparent 60%);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: clamp(2.2rem, 4vw, 3.4rem);
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -1px;
      margin-bottom: 24px;
      color: #fff;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, #00e575 0%, #00d2b4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-text {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.85;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }
    .hero-stats-strip {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .stat-item-num {
      font-family: var(--font-mono);
      font-size: 26px;
      font-weight: 700;
      color: #fff;
    }
    .stat-item-label {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 竖屏视频解析感主视觉容器 */
    .vertical-video-stage {
      position: relative;
      width: 100%;
      max-width: 380px;
      margin: 0 auto;
      aspect-ratio: 9 / 16;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(0, 229, 117, 0.4);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 25px rgba(0, 229, 117, 0.15);
      background: #000;
    }
    .stage-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.85;
    }
    .stage-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, rgba(10,12,16,0.85) 90%);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .live-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: rgba(0, 0, 0, 0.7);
      border: 1px solid var(--accent);
      border-radius: 20px;
      font-size: 11px;
      color: var(--accent);
      font-family: var(--font-mono);
      width: fit-content;
    }
    .live-pulse {
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }
    .hud-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }
    .hud-card {
      background: rgba(18, 22, 31, 0.85);
      backdrop-filter: blur(8px);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hud-val {
      font-family: var(--font-mono);
      font-size: 15px;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    .hud-name {
      font-size: 11px;
      color: var(--text-dim);
    }

    /* 2. 安全主张 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition-smooth);
    }
    .glass-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 229, 117, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--accent);
      margin-bottom: 20px;
    }
    .glass-card h3 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .glass-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 3. 检查项 Checklist */
    .checklist-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .check-item {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px 24px;
      border-radius: var(--radius-md);
    }
    .check-mark {
      color: var(--accent);
      font-size: 18px;
      font-weight: bold;
      line-height: 1;
    }
    .check-content h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 6px;
    }
    .check-content p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 4. 合规徽章 */
    .badges-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 24px;
    }
    .compliance-pill {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 16px 28px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .compliance-pill span.num {
      font-family: var(--font-mono);
      font-size: 20px;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    .compliance-pill span.txt {
      font-size: 14px;
      font-weight: 500;
      color: #fff;
    }

    /* 5. 边界说明 */
    .boundary-panel {
      background: linear-gradient(145deg, #121721 0%, #0c0e14 100%);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .boundary-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .scope-box {
      background: rgba(0, 0, 0, 0.3);
      padding: 24px;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--accent);
    }
    .scope-box.alt {
      border-left-color: var(--text-dim);
    }
    .scope-box h4 {
      color: #fff;
      margin-bottom: 12px;
      font-size: 16px;
    }
    .scope-box ul {
      list-style: none;
      font-size: 13px;
      color: var(--text-muted);
    }
    .scope-box ul li {
      margin-bottom: 8px;
      position: relative;
      padding-left: 14px;
    }
    .scope-box ul li::before {
      content: "•";
      position: absolute;
      left: 0;
      color: var(--accent);
    }

    /* 6. 技术底座参数区 */
    .tech-specs-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .spec-img-wrapper {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .spec-items {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .spec-unit {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-sm);
    }
    .spec-unit-val {
      font-family: var(--font-mono);
      font-size: 24px;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .spec-unit-tit {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 7. 细分套件产品 */
    .suite-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .suite-tag {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 11px;
      padding: 3px 8px;
      background: rgba(0, 210, 180, 0.12);
      color: var(--accent-cyan);
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .suite-title {
      font-size: 20px;
      color: #fff;
      margin-bottom: 12px;
    }
    .suite-list {
      list-style: none;
      margin: 20px 0;
      font-size: 13px;
      color: var(--text-muted);
    }
    .suite-list li {
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    /* 8. 实战复盘看板 */
    .tactics-board-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      margin-top: 30px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    }

    /* 9. 资讯与洞察 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-cover {
      height: 180px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-cover img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-dim);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 16px;
      color: #fff;
      line-height: 1.5;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. 信任背书 / 战术分析师语录 */
    .testimonial-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .quote-icon {
      font-size: 32px;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 12px;
      font-family: serif;
    }
    .testimonial-card p {
      font-size: 14px;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .author-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-meta h5 {
      font-size: 14px;
      color: #fff;
    }
    .author-meta span {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 11. 常见问题 FAQ */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
    }
    .faq-icon {
      color: var(--accent);
      font-size: 18px;
      transition: transform 0.2s ease;
    }
    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 12. 转化收口行动区 */
    .cta-banner {
      background: linear-gradient(135deg, #111a1e 0%, #12161f 100%);
      border: 1px solid rgba(0, 229, 117, 0.25);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .cta-banner h2 {
      font-size: 28px;
      color: #fff;
      margin-bottom: 16px;
    }
    .cta-banner p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .form-input {
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid var(--border-color);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      outline: none;
    }
    .form-input:focus {
      border-color: var(--accent);
    }

    /* 13. 保障支持条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
      padding-top: 40px;
    }
    .guarantee-item h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 6px;
    }
    .guarantee-item p {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 页脚 */
    .site-footer {
      background: #06070a;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 30px 0;
      font-size: 13px;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h5 {
      font-size: 14px;
      color: #fff;
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-actions, .hero-stats-strip {
        justify-content: center;
      }
      .grid-3, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-banner {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .top-meta-bar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .grid-3, .checklist-grid, .boundary-flex, .tech-specs-box, .news-grid, .guarantee-bar {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 26px;
      }
    }