/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-alt: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --text-light-muted: #94A3B8;
      --primary: #1E293B;
      --accent: #10B981;
      --accent-hover: #059669;
      --warn: #F59E0B;
      --danger: #EF4444;
      --border: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(15,23,42,0.08);
      --shadow-lg: 0 20px 40px -15px rgba(15,23,42,0.12);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-sans);
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      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;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部通栏工具条 */
    .top-bar {
      background-color: var(--bg-dark);
      color: var(--text-light-muted);
      font-size: 13px;
      border-bottom: 1px solid var(--border-dark);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-status {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-weight: 500;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }
    .top-links {
      display: flex;
      gap: 20px;
      font-family: var(--font-mono);
    }

    /* 主导航 */
    .site-header {
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 22px;
      letter-spacing: -0.5px;
      color: var(--primary);
    }
    .brand-logo-mark {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), #334155);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-family: var(--font-mono);
      font-weight: 900;
      border: 1px solid var(--accent);
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
      align-items: center;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--accent);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease-out;
    }
    .btn-primary {
      background-color: var(--primary);
      color: var(--text-light);
    }
    .btn-primary:hover {
      background-color: #000;
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--border);
      color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--bg-main);
      border-color: var(--primary);
    }
    .btn-outline-light {
      background-color: transparent;
      border-color: var(--border-dark);
      color: var(--text-light);
    }
    .btn-outline-light:hover {
      background-color: var(--border-dark);
    }

    /* 板块通用 */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-alt {
      background-color: var(--bg-alt);
    }
    .section-header {
      margin-bottom: 56px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
      margin-bottom: 56px;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-family: var(--font-mono);
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      background-color: rgba(16, 185, 129, 0.1);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      font-weight: 600;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: inherit;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: var(--text-light-muted);
    }

    /* 1. Hero 区域：新品发布与倒计时环 */
    .hero-section {
      padding: 70px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
                  radial-gradient(circle at 10% 90%, rgba(30, 41, 59, 0.05) 0%, transparent 40%),
                  var(--bg-main);
      border-bottom: 1px solid var(--border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.15;
      letter-spacing: -1px;
      color: var(--primary);
      margin-bottom: 24px;
    }
    .hero-intro {
      font-size: 17px;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .hero-release-panel {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .release-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
    }
    .release-version {
      font-family: var(--font-mono);
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }
    .timer-ring-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 28px;
    }
    .countdown-unit {
      text-align: center;
      background: var(--bg-main);
      padding: 12px 16px;
      border-radius: var(--radius-md);
      min-width: 68px;
      border: 1px solid var(--border);
    }
    .countdown-unit .num {
      font-size: 24px;
      font-weight: 800;
      font-family: var(--font-mono);
      color: var(--primary);
      display: block;
    }
    .countdown-unit .lbl {
      font-size: 11px;
      color: var(--text-muted);
    }
    .hero-points-list {
      list-style: none;
      margin-bottom: 28px;
    }
    .hero-points-list li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 10px;
    }
    .hero-points-list li::before {
      content: "✓";
      color: var(--accent);
      font-weight: 800;
    }

    /* 2. 卖点三连 */
    .trio-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .trio-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: all 0.25s ease;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .trio-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .trio-icon {
      width: 48px;
      height: 48px;
      background-color: var(--bg-main);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      border: 1px solid var(--border);
      color: var(--primary);
    }
    .trio-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--primary);
    }
    .trio-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 3. 入口矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      display: block;
      transition: all 0.2s ease;
    }
    .matrix-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .matrix-badge {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .matrix-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .matrix-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 4. 最新发布体系 */
    .latest-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .latest-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }
    .latest-specs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin: 24px 0;
    }
    .spec-item {
      background: var(--bg-main);
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
    }
    .spec-item .label {
      font-size: 12px;
      color: var(--text-muted);
      display: block;
    }
    .spec-item .val {
      font-size: 15px;
      font-weight: 700;
      font-family: var(--font-mono);
      color: var(--primary);
    }

    /* 5. 热门专题 */
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .topic-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .topic-img {
      height: 190px;
      object-fit: cover;
      width: 100%;
    }
    .topic-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .topic-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-light);
      margin-bottom: 12px;
    }
    .topic-body p {
      font-size: 14px;
      color: var(--text-light-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }

    /* 6. 核心优势 6 宫格 */
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .adv-num {
      position: absolute;
      top: 24px;
      right: 24px;
      font-family: var(--font-mono);
      font-size: 14px;
      font-weight: 700;
      color: var(--border-dark);
    }
    .adv-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .adv-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 7. 案例攻防对比 */
    .case-container {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      display: grid;
      grid-template-columns: 240px 1fr 1fr;
      gap: 30px;
      align-items: center;
    }
    .case-meta h4 {
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .case-meta span {
      font-size: 13px;
      color: var(--text-muted);
    }
    .case-box {
      background: var(--bg-main);
      padding: 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
    }
    .case-box.ai-box {
      border-color: rgba(16, 185, 129, 0.4);
      background: rgba(16, 185, 129, 0.03);
    }
    .case-box-title {
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 8px;
      display: block;
    }
    .case-box-title.red { color: var(--danger); }
    .case-box-title.green { color: var(--accent); }
    .case-box p {
      font-size: 13px;
      color: var(--text-main);
      line-height: 1.6;
    }

    /* 8. 资讯列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }
    .news-item h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-item p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .news-link:hover {
      color: var(--accent);
    }

    /* 9. 数据指标横贯条 */
    .metrics-strip {
      background-color: var(--bg-dark);
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
      padding: 60px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-number {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-light-muted);
    }

    /* 10. 口碑与实证评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .review-quote {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: var(--bg-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      border: 1px solid var(--border);
    }
    .reviewer-info h5 {
      font-size: 14px;
      color: var(--primary);
    }
    .reviewer-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 11. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 12. 保障合规条 */
    .compliance-band {
      background-color: var(--bg-main);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 40px 0;
    }
    .compliance-grid {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .comp-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .comp-icon {
      font-size: 24px;
      color: var(--accent);
    }
    .comp-text h6 {
      font-size: 14px;
      color: var(--primary);
      font-weight: 700;
    }
    .comp-text span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 13. 底部收口行动区 */
    .cta-section {
      background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2333 100%);
      color: #fff;
      padding: 80px 0;
    }
    .cta-box {
      max-width: 720px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-box h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-box p {
      font-size: 15px;
      color: var(--text-light-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      justify-content: center;
      margin-bottom: 16px;
    }
    .cta-input {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid var(--border-dark);
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      width: 320px;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--accent);
    }
    .cta-note {
      font-size: 12px;
      color: var(--text-light-muted);
    }

    /* 页脚 */
    .site-footer {
      background-color: #070B14;
      color: var(--text-light-muted);
      padding: 60px 0 30px;
      font-size: 13px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #fff;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #fff;
      font-size: 14px;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #fff;
    }
    .footer-bottom {
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: var(--font-mono);
      font-size: 12px;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: repeat(2, 1fr); }
      .case-card { grid-template-columns: 1fr; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 32px; }
      .trio-grid, .topics-grid, .adv-grid, .news-grid, .reviews-grid { grid-template-columns: 1fr; }
      .latest-wrapper { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
      .top-links { display: none; }
      .cta-form { flex-direction: column; align-items: stretch; }
      .cta-input { width: 100%; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }