/* roulang page: index */
:root {
      --bg-main: #0D0F12;
      --bg-surface: #15191E;
      --bg-card: #1D232A;
      --bg-card-hover: #242C35;
      --primary: #00E599;
      --primary-dim: rgba(0, 229, 153, 0.12);
      --accent-live: #FF3B30;
      --accent-gold: #F5A623;
      --text-pure: #FFFFFF;
      --text-muted: #9BA3AF;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(0, 229, 153, 0.4);
      --shadow-normal: 0 8px 24px rgba(0, 0, 0, 0.45);
      --shadow-accent: 0 12px 30px rgba(0, 229, 153, 0.18);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-main);
      color: var(--text-pure);
      font-family: var(--font-stack);
    }

    body {
      background-color: var(--bg-main);
      overflow-x: hidden;
      line-height: 1.6;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: 1rem;
    }

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

    /* 顶部通栏状态条 */
    .top-bar {
      background-color: #07090B;
      border-bottom: 1px solid var(--border-line);
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-bar-contact {
      display: flex;
      gap: 20px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 15, 18, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .site-logo {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-pure);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo span {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      font-size: 0.9375rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-cta {
      background: var(--primary);
      color: #051A11;
      padding: 10px 20px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 0.9375rem;
      transition: var(--transition);
    }
    .nav-cta:hover {
      background: #00FFAC;
      transform: translateY(-2px);
      box-shadow: var(--shadow-accent);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-line);
      color: var(--text-pure);
      font-size: 1.25rem;
      padding: 6px 12px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* 按钮通用体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: 6px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn-primary {
      background: var(--primary);
      color: #051A11;
    }
    .btn-primary:hover {
      background: #00FFAC;
      transform: translateY(-3px);
      box-shadow: var(--shadow-accent);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-pure);
      border-color: var(--border-line);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-3px);
    }

    /* Section通用结构 */
    section {
      padding: 96px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--bg-main);
    }
    .section-surface {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
    }
    .section-header {
      max-width: 800px;
      margin: 0 auto 64px auto;
      text-align: center;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: var(--primary-dim);
      border: 1px solid var(--border-highlight);
      color: var(--primary);
      border-radius: 20px;
      font-size: 0.8125rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 1: 首屏 Hero */
    .hero-section {
      position: relative;
      padding: 120px 0 100px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 10% 70%, rgba(26, 33, 42, 0.5) 0%, transparent 50%),
                  var(--bg-main);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 24px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-intro {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 24px;
      font-size: 0.875rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-line);
      padding-top: 24px;
    }
    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .trust-item strong {
      color: var(--text-pure);
    }
    .hero-visual {
      position: relative;
    }
    .hero-card-display {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 12px;
      padding: 16px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
      position: relative;
    }
    .hero-card-display img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      border-radius: 8px;
      filter: contrast(1.05);
    }
    .hero-status-tag {
      position: absolute;
      top: 32px;
      right: 32px;
      background: rgba(13, 15, 18, 0.85);
      border: 1px solid var(--border-line);
      padding: 6px 14px;
      border-radius: 30px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8125rem;
      backdrop-filter: blur(8px);
    }

    /* 板块 2: 产品架构 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .arch-media img {
      width: 100%;
      height: 360px;
      object-fit: cover;
      border: 1px solid var(--border-line);
    }
    .arch-info h3 {
      font-size: 1.75rem;
      margin-bottom: 20px;
    }
    .arch-points {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-point-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .arch-point-item svg {
      width: 20px;
      height: 20px;
      stroke: var(--primary);
      flex-shrink: 0;
      margin-top: 4px;
    }

    /* 板块 3: 核心优势 (6网格) */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      padding: 32px 24px;
      border-radius: 10px;
      transition: var(--transition);
    }
    .feature-box:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-accent);
    }
    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      background: var(--primary-dim);
      border: 1px solid var(--border-highlight);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }
    .feature-box h4 {
      font-size: 1.1875rem;
      margin-bottom: 12px;
      color: var(--text-pure);
    }
    .feature-box p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 4: 功能矩阵卡片 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 12px;
      padding: 40px 32px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .matrix-card.highlight {
      border-color: var(--primary);
      background: linear-gradient(180deg, #1A2228 0%, var(--bg-surface) 100%);
      box-shadow: 0 16px 36px rgba(0, 229, 153, 0.12);
    }
    .matrix-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #051A11;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
    }
    .matrix-card h4 {
      font-size: 1.375rem;
      margin-bottom: 12px;
    }
    .matrix-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .matrix-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 32px;
      flex-grow: 1;
    }
    .matrix-features li {
      font-size: 0.875rem;
      color: var(--text-pure);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .matrix-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* 板块 5: 技术架构理念 */
    .tech-banner {
      background: linear-gradient(135deg, #10161D 0%, #07090C 100%);
      border: 1px solid var(--border-line);
      border-radius: 16px;
      padding: 48px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .tech-banner-info h3 {
      font-size: 1.875rem;
      margin-bottom: 16px;
    }
    .tech-banner-info p {
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .tech-metrics-mini {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .tech-m-item {
      background: rgba(255, 255, 255, 0.03);
      padding: 16px;
      border-radius: 8px;
      border-left: 3px solid var(--primary);
    }
    .tech-m-item span {
      display: block;
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .tech-m-item strong {
      font-size: 1.25rem;
      color: var(--text-pure);
    }

    /* 板块 6: 落地用户故事 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 10px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-img-box {
      height: 200px;
      position: relative;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 0;
    }
    .case-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .case-tag {
      font-size: 0.75rem;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
      font-weight: 600;
    }
    .case-body h4 {
      font-size: 1.125rem;
      margin-bottom: 12px;
    }
    .case-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .case-stat-bar {
      border-top: 1px solid var(--border-line);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .case-stat-bar strong {
      color: var(--primary);
      font-size: 0.9375rem;
    }

    /* 板块 7: 运行数据统计条 */
    .stats-strip {
      background: #090B0E;
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
      padding: 56px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .stat-num {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.03em;
      margin-bottom: 6px;
      font-family: monospace, var(--font-stack);
    }
    .stat-label {
      font-size: 0.9375rem;
      color: var(--text-muted);
    }

    /* 板块 8: 行业评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 10px;
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-quote {
      font-size: 0.9375rem;
      color: var(--text-pure);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-line);
      padding-top: 16px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-card);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--primary);
      border: 1px solid var(--border-highlight);
    }
    .testi-info h5 {
      font-size: 0.9375rem;
      margin-bottom: 2px;
    }
    .testi-info span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 9: 资讯看板 */
    .news-magazine {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
    }
    .news-major {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-major img {
      height: 280px;
      object-fit: cover;
      width: 100%;
      border-radius: 0;
    }
    .news-major-body {
      padding: 32px;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 0.8125rem;
      color: var(--primary);
      margin-bottom: 10px;
      display: inline-block;
    }
    .news-major-body h4 {
      font-size: 1.375rem;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-major-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .news-minor-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .news-minor-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 20px;
      transition: var(--transition);
    }
    .news-minor-card:hover {
      border-color: var(--border-highlight);
    }
    .news-minor-card h5 {
      font-size: 1.0625rem;
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .news-minor-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 10: FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      font-size: 1.0625rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.5rem;
      line-height: 1;
      color: var(--primary);
      transition: var(--transition);
    }
    .faq-item.open .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.9375rem;
      line-height: 1.7;
    }
    .faq-item.open .faq-answer {
      max-height: 240px;
      padding-bottom: 20px;
    }

    /* 板块 11: 安全与保障条 */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-box {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 24px;
      text-align: center;
    }
    .guarantee-box svg {
      width: 36px;
      height: 36px;
      stroke: var(--primary);
      margin-bottom: 12px;
    }
    .guarantee-box h5 {
      font-size: 1.0625rem;
      margin-bottom: 6px;
    }
    .guarantee-box p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 12: 底部线索预约表单 */
    .cta-container {
      background: radial-gradient(circle at 50% 0%, rgba(0, 229, 153, 0.15) 0%, rgba(21, 25, 30, 0.8) 70%);
      border: 1pxsolid var(--border-highlight);
      border-radius: 16px;
      padding: 64px 48px;
      max-width: 960px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-container h3 {
      font-size: 2.25rem;
      margin-bottom: 16px;
    }
    .cta-container p {
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto 36px auto;
      font-size: 1.0625rem;
    }
    .cta-form {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      text-align: left;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .form-control {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 12px 16px;
      color: var(--text-pure);
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-dim);
    }
    .form-submit-row {
      grid-column: span 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      margin-top: 12px;
    }

    /* 底部固定条 */
    .sticky-bottom-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(13, 15, 18, 0.95);
      border-top: 1px solid var(--border-highlight);
      backdrop-filter: blur(12px);
      padding: 12px 0;
      z-index: 999;
      transform: translateY(100%);
      transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .sticky-bottom-bar.visible {
      transform: translateY(0);
    }
    .sticky-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .sticky-bar-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .sticky-live-badge {
      background: var(--accent-live);
      color: #FFF;
      font-size: 0.6875rem;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      letter-spacing: 0.05em;
    }

    /* 页脚 */
    .site-footer {
      background: #07090C;
      border-top: 1px solid var(--border-line);
      padding: 72px 0 32px 0;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-col h5 {
      color: var(--text-pure);
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }
    .footer-beian {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    /* 响应式样式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .tech-banner, .news-magazine {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-3x2, .matrix-grid, .case-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-links, .nav-cta { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-content h1 { font-size: 2.125rem; }
      .grid-3x2, .matrix-grid, .case-grid, .testimonial-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .form-submit-row {
        grid-column: span 1;
      }
      .cta-container {
        padding: 40px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .sticky-bar-info span {
        display: none;
      }
      .nav-mobile-layer {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #0D0F12;
        border-bottom: 1px solid var(--border-line);
        padding: 24px;
        flex-direction: column;
        gap: 16px;
        z-index: 998;
      }
      .nav-mobile-layer.show {
        display: flex;
      }
    }