/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --bg-card: rgba(30, 41, 59, 0.72);
      --bg-card-hover: rgba(40, 53, 76, 0.85);
      --primary-cyan: #00f2fe;
      --primary-blue: #4facfe;
      --neon-purple: #7928ca;
      --accent-green: #10b981;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --border-light: rgba(255, 255, 255, 0.12);
      --border-cyan: rgba(0, 242, 254, 0.35);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-glow: 0 0 24px rgba(0, 242, 254, 0.3);
      --font-stack: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

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

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

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

    button, input, select, textarea {
      font-family: inherit;
    }

    /* 容器体系 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section-wrap {
      padding: 96px 0;
      position: relative;
    }

    .section-alt {
      background: linear-gradient(180deg, rgba(15, 23, 42, 0.45) 0%, rgba(10, 15, 29, 0.9) 100%);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 1px;
      color: var(--primary-cyan);
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.25);
      padding: 5px 16px;
      border-radius: 9999px;
      margin-bottom: 16px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 18px;
      color: #fff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .glass-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-cyan);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 242, 254, 0.15);
    }

    /* 按钮组 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      font-size: 0.98rem;
      font-weight: 600;
      border-radius: 9999px;
      cursor: pointer;
      transition: all 0.3s ease;
      outline: none;
      border: none;
      min-height: 48px;
    }

    .btn-glow {
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
      color: #050811;
      box-shadow: var(--shadow-glow);
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.65);
      color: #000;
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.05);
      color: #fff;
      border: 1px solid var(--border-light);
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 15, 29, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 8px 0;
      font-size: 0.82rem;
      color: var(--text-dim);
    }

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

    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-green);
    }

    .top-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-green);
      box-shadow: 0 0 8px var(--accent-green);
    }

    .main-nav {
      padding: 16px 0;
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #fff;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary-cyan), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 0 16px rgba(0, 242, 254, 0.4);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.94rem;
      color: var(--text-muted);
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }

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

    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: width 0.3s;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-light);
      color: #fff;
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.2rem;
    }

    /* 板块一：Hero Banner */
    .hero-section {
      position: relative;
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 10%, rgba(79, 172, 254, 0.15) 0%, rgba(10, 15, 29, 0) 70%),
                  url('/assets/images/5d1451bf756327b4.webp') center/cover no-repeat;
      overflow: hidden;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 15, 29, 0.85) 0%, rgba(10, 15, 29, 0.96) 100%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 980px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #ffffff 30%, #a5f3fc 70%, #67e8f9 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 840px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .metric-card {
      background: rgba(15, 23, 42, 0.65);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      backdrop-filter: blur(12px);
    }

    .metric-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-cyan);
      display: block;
      margin-bottom: 4px;
    }

    .metric-lab {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 板块二：6卡片运算矩阵 */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      color: var(--primary-cyan);
    }

    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .feature-text {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块三：安全体系左右图文 */
    .security-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .tech-specs-box {
      background: rgba(10, 15, 29, 0.85);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px;
      position: relative;
      overflow: hidden;
    }

    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .spec-item:last-child {
      margin-bottom: 0;
    }

    .spec-icon {
      flex-shrink: 0;
      width: 32px;
      height: 32px;
      border-radius: 6px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--accent-green);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .spec-title {
      font-weight: 600;
      font-size: 1.05rem;
      margin-bottom: 4px;
      color: #fff;
    }

    .spec-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 板块四：3大产品卡片区 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .product-badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--neon-purple);
      background: rgba(121, 40, 202, 0.12);
      border: 1px solid rgba(121, 40, 202, 0.3);
      padding: 4px 12px;
      border-radius: 9999px;
      margin-bottom: 16px;
    }

    .product-meter {
      margin: 20px 0;
    }

    .meter-label {
      display: flex;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .meter-bar {
      height: 6px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 3px;
      overflow: hidden;
    }

    .meter-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary-cyan), var(--primary-blue));
      border-radius: 3px;
    }

    /* 板块五：对比实测看板 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .compare-card-old {
      background: rgba(20, 26, 41, 0.5);
      border: 1px dashed rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 36px;
    }

    .compare-card-new {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid var(--primary-cyan);
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.15);
      border-radius: var(--radius-md);
      padding: 36px;
      position: relative;
    }

    .compare-list {
      list-style: none;
      margin-top: 24px;
    }

    .compare-list li {
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .compare-list li:last-child {
      border-bottom: none;
    }

    .tag-diff-bad {
      color: #ef4444;
      font-weight: 700;
    }

    .tag-diff-good {
      color: var(--accent-green);
      font-weight: 700;
    }

    /* 板块六：里程碑时间轴 */
    .timeline {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px 0;
    }

    .timeline::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: rgba(0, 242, 254, 0.2);
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }

    .timeline-item.left {
      left: 0;
      padding-right: 40px;
      text-align: right;
    }

    .timeline-item.right {
      left: 50%;
      padding-left: 40px;
      text-align: left;
    }

    .timeline-dot {
      position: absolute;
      top: 8px;
      width: 14px;
      height: 14px;
      background: var(--primary-cyan);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--primary-cyan);
    }

    .timeline-item.left .timeline-dot {
      right: -7px;
    }

    .timeline-item.right .timeline-dot {
      left: -7px;
    }

    .timeline-date {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-cyan);
      margin-bottom: 6px;
    }

    /* 板块七：4列场景专题 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: left;
      transition: all 0.3s;
    }

    .scene-card:hover {
      border-color: var(--primary-blue);
      transform: translateY(-4px);
    }

    /* 板块八：数据统计横条 */
    .stats-strip {
      background: linear-gradient(90deg, rgba(15, 23, 42, 0.95), rgba(20, 28, 50, 0.95));
      border-top: 1px solid var(--border-cyan);
      border-bottom: 1px solid var(--border-cyan);
      padding: 50px 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-number {
      font-size: 2.75rem;
      font-weight: 900;
      color: #fff;
      background: linear-gradient(135deg, #fff 0%, var(--primary-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .stat-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 板块九：企业保障 3列 */
    .protection-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    /* 板块十：用户深度故事 2列 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .story-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .story-tag {
      font-size: 0.8rem;
      color: var(--accent-green);
      font-weight: 600;
      margin-bottom: 12px;
    }

    /* 板块十一：评价瀑布流 3列 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
    }

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
      color: #fff;
    }

    .user-info {
      font-size: 0.85rem;
    }

    .user-name {
      color: #fff;
      font-weight: 600;
    }

    .user-time {
      color: var(--text-dim);
    }

    /* 板块十二：动态资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-img {
      height: 180px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 18px;
    }

    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .news-card:hover .news-img img {
      transform: scale(1.05);
    }

    .news-date {
      font-size: 0.82rem;
      color: var(--primary-cyan);
      margin-bottom: 8px;
    }

    /* 板块十三：FAQ 手风琴 */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.25s;
    }

    .faq-item.active {
      border-color: var(--primary-cyan);
    }

    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: #fff;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
      color: var(--primary-cyan);
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
    }

    /* 板块十四：转化 CTA 表单 */
    .cta-card {
      background: radial-gradient(circle at top, rgba(0, 242, 254, 0.12) 0%, rgba(15, 23, 42, 0.9) 100%);
      border: 1px solid var(--primary-cyan);
      box-shadow: 0 0 35px rgba(0, 242, 254, 0.2);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .cta-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-top: 36px;
      text-align: left;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: #e2e8f0;
    }

    .form-control {
      width: 100%;
      background: rgba(10, 15, 29, 0.7);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.25s, box-shadow 0.25s;
    }

    .form-control:focus {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.25);
    }

    .form-status {
      display: none;
      margin-top: 18px;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      background: rgba(16, 185, 129, 0.15);
      border: 1px solid var(--accent-green);
      color: #34d399;
    }

    /* 页脚系统 */
    .site-footer {
      background-color: #050811;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand-desc {
      margin-top: 16px;
      line-height: 1.7;
      color: var(--text-dim);
      max-width: 360px;
    }

    .footer-col-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }

    .footer-nav-list {
      list-style: none;
    }

    .footer-nav-list li {
      margin-bottom: 12px;
    }

    .footer-nav-list a:hover {
      color: var(--primary-cyan);
      padding-left: 4px;
    }

    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
      line-height: 1.5;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 26px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: var(--text-dim);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-3x2, .product-grid, .reviews-grid, .news-grid, .protection-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0a0f1d;
        flex-direction: column;
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border-light);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-mobile-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .grid-3x2, .product-grid, .reviews-grid, .news-grid, .protection-grid, .scene-grid, .stats-grid, .story-grid, .compare-wrapper, .security-split {
        grid-template-columns: 1fr;
      }
      .timeline::before {
        left: 10px;
      }
      .timeline-item {
        width: 100%;
        padding-left: 36px !important;
        text-align: left !important;
      }
      .timeline-item.right {
        left: 0;
      }
      .timeline-dot {
        left: 3px !important;
      }
      .cta-form {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }