/* roulang page: index */
:root {
      --bg-dark: #0A0D14;
      --bg-card: #121620;
      --bg-card-alt: #171c28;
      --primary: #00FF87;
      --primary-glow: rgba(0, 255, 135, 0.35);
      --accent-cyan: #60EFFF;
      --accent-coral: #FF5E3A;
      --text-main: #FFFFFF;
      --text-muted: #A0AEC0;
      --text-dim: #718096;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 255, 135, 0.25);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-muted);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary);
    }

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

    .container-wide {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部极窄信息条 */
    .top-bar-meta {
      background: #06080d;
      border-bottom: 1px solid var(--border-line);
      font-size: 13px;
      color: var(--text-dim);
      padding: 8px 0;
    }
    .top-meta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      animation: pulse-dot 2s infinite ease-in-out;
    }
    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* 主导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-line);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .brand-mark {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--bg-dark);
      font-weight: 900;
      font-size: 16px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
    }
    .nav-menu a {
      font-size: 15px;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--text-main);
    }
    .nav-menu a.active::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn-neon {
      background: var(--primary);
      color: #05160e;
      box-shadow: 0 0 20px rgba(0, 255, 135, 0.25);
    }
    .btn-neon:hover {
      background: #33ff9e;
      color: #05160e;
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 255, 135, 0.45);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.2);
      color: var(--text-main);
      background: transparent;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 255, 135, 0.05);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 8px 16px;
      font-size: 13px;
    }

    /* 板块结构 */
    .page-section {
      padding: 90px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--bg-dark);
    }
    .section-alt {
      background-color: var(--bg-card);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-badge {
      display: inline-block;
      font-size: 12px;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(0, 255, 135, 0.1);
      border: 1px solid rgba(0, 255, 135, 0.25);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 720px;
      line-height: 1.7;
    }

    /* Hero 板块：左文右图 5:7 错位 */
    .hero-section {
      position: relative;
      padding: 100px 0 80px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 255, 135, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(96, 239, 255, 0.05) 0%, transparent 50%),
                  var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-kpis {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid var(--border-line);
    }
    .kpi-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      font-family: inherit;
    }
    .kpi-label {
      font-size: 12px;
      color: var(--text-dim);
      margin-top: 2px;
    }
    .hero-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-glow);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    }
    .hero-overlay-tag {
      position: absolute;
      top: 20px;
      right: 20px;
      background: rgba(10, 13, 20, 0.85);
      border: 1px solid var(--border-glow);
      padding: 10px 16px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(8px);
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 13px;
      color: var(--text-main);
    }

    /* 卖点三连 */
    .trio-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .trio-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .trio-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
      opacity: 0;
      transition: var(--transition);
    }
    .trio-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: 0 15px 35px rgba(0, 255, 135, 0.08);
    }
    .trio-card:hover::before {
      opacity: 1;
    }
    .trio-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 255, 135, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 22px;
    }
    .trio-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .trio-text {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 入口矩阵 (Icon Matrix) */
    .portal-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .portal-item {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .portal-item:hover {
      background: rgba(255, 255, 255, 0.05);
      border-color: rgba(255, 255, 255, 0.2);
      transform: translateY(-2px);
    }
    .portal-tag {
      font-size: 12px;
      color: var(--accent-cyan);
      margin-bottom: 10px;
      font-weight: 600;
    }
    .portal-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .portal-detail {
      font-size: 14px;
      color: var(--text-dim);
      margin-bottom: 16px;
      line-height: 1.5;
    }
    .portal-link {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 场景演示板块 */
    .scene-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .scene-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-line);
      position: relative;
    }
    .scene-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .scene-item {
      padding: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      border-left: 3px solid var(--border-line);
      transition: var(--transition);
    }
    .scene-item:hover, .scene-item.active {
      border-left-color: var(--primary);
      border-color: rgba(0, 255, 135, 0.2);
    }
    .scene-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .scene-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 最新发布 (算法更新日志) */
    .release-timeline {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .release-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 28px;
      display: grid;
      grid-template-columns: 180px 1fr;
      gap: 24px;
      align-items: baseline;
    }
    .release-ver {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .release-date {
      font-size: 13px;
      color: var(--text-dim);
      font-weight: normal;
    }
    .release-content h4 {
      font-size: 18px;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .release-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 热门专题 */
    .topic-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .topic-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .topic-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
    }
    .topic-thumb {
      height: 190px;
      overflow: hidden;
    }
    .topic-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .topic-card:hover .topic-thumb img {
      transform: scale(1.05);
    }
    .topic-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .topic-h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .topic-p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    /* 资讯列表 */
    .news-compact-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .news-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .news-row:hover {
      border-color: var(--primary);
      background: var(--bg-card-alt);
    }
    .news-row-title {
      font-size: 16px;
      color: var(--text-main);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .news-category {
      font-size: 12px;
      padding: 2px 8px;
      background: rgba(96, 239, 255, 0.1);
      color: var(--accent-cyan);
      border-radius: 4px;
    }
    .news-date {
      font-size: 14px;
      color: var(--text-dim);
    }

    /* 数据指标 (Performance Strip) */
    .metrics-strip {
      background: linear-gradient(180deg, #121620 0%, #0c0f17 100%);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-value {
      font-size: 44px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      text-shadow: 0 0 20px rgba(0, 255, 135, 0.3);
    }
    .metric-name {
      font-size: 16px;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 口碑评价 */
    .quote-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .quote-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .quote-stars {
      color: var(--primary);
      margin-bottom: 16px;
      font-size: 14px;
      letter-spacing: 2px;
    }
    .quote-text {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .quote-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #1a2233;
      border: 1px solid var(--border-line);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-name {
      font-size: 15px;
      color: var(--text-main);
      font-weight: 600;
    }
    .author-role {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 异议拆解 (FAQ) */
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-question {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary);
    }
    .faq-item.active .faq-question::after {
      content: "−";
    }
    .faq-answer {
      padding: 0 28px 24px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 保障条 */
    .guarantee-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-box {
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      padding: 24px;
      background: rgba(255, 255, 255, 0.015);
      text-align: center;
    }
    .guarantee-tag {
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .guarantee-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .guarantee-desc {
      font-size: 13px;
      color: var(--text-dim);
      line-height: 1.5;
    }

    /* 方案对比 */
    .tier-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      align-items: stretch;
    }
    .tier-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-lg);
      padding: 40px 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .tier-card.featured {
      border-color: var(--primary);
      box-shadow: 0 0 35px rgba(0, 255, 135, 0.15);
    }
    .featured-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #05160e;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      text-transform: uppercase;
    }
    .tier-name {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .tier-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 42px;
    }
    .tier-features {
      list-style: none;
      margin: 0 0 30px 0;
      display: flex;
      flex-direction: column;
      gap: 12px;
      border-top: 1px solid var(--border-line);
      padding-top: 24px;
    }
    .tier-features li {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tier-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* 预约联系入口 (单收口表单) */
    .contact-wrapper {
      background: radial-gradient(circle at center, rgba(0, 255, 135, 0.08) 0%, rgba(18, 22, 32, 0.95) 70%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 70px 40px;
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }
    .contact-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .contact-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .contact-form {
      display: flex;
      max-width: 580px;
      margin: 0 auto;
      gap: 12px;
    }
    .contact-input {
      flex-grow: 1;
      background: rgba(10, 13, 20, 0.85);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      padding: 14px 20px;
      color: var(--text-main);
      font-size: 15px;
      outline: none;
      transition: var(--transition);
    }
    .contact-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 15px var(--primary-glow);
    }

    /* 页脚 */
    .main-footer {
      background: #06080d;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-dim);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .trio-grid, .topic-grid, .quote-grid, .tier-grid {
        grid-template-columns: 1fr;
      }
      .portal-grid, .guarantee-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .portal-grid, .guarantee-strip {
        grid-template-columns: 1fr;
      }
      .release-card {
        grid-template-columns: 1fr;
        gap: 10px;
      }
      .contact-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 14px;
        text-align: center;
      }
    }