/* roulang page: index */
:root {
      --c-bg: #0D1117;
      --c-bg-card: #161B22;
      --c-bg-light: #F8FAFC;
      --c-card-light: #FFFFFF;
      --c-primary: #00E599;
      --c-primary-hover: #00C885;
      --c-accent: #FF5C00;
      --c-text-dark: #0D1117;
      --c-text-muted-dark: #64748B;
      --c-text-light: #F1F5F9;
      --c-text-muted-light: #94A3B8;
      --c-border: rgba(255, 255, 255, 0.08);
      --c-border-light: #E2E8F0;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --container-max: 1240px;
      --transition: cubic-bezier(0.16, 1, 0.3, 1) 0.25s;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--c-bg);
      color: var(--c-text-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; }
    
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.05em;
      border-radius: var(--radius-full);
      text-transform: uppercase;
    }
    .badge-primary { background: rgba(0, 229, 153, 0.15); color: var(--c-primary); border: 1px solid rgba(0, 229, 153, 0.3); }
    .badge-accent { background: rgba(255, 92, 0, 0.15); color: var(--c-accent); border: 1px solid rgba(255, 92, 0, 0.3); }
    
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center { text-align: center; }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1rem;
      line-height: 1.7;
      max-width: 680px;
    }
    .text-center .section-desc { margin: 0 auto; }
    
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--c-primary);
      color: #051A12;
    }
    .btn-primary:hover {
      background-color: var(--c-primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 229, 153, 0.25);
    }
    .btn-outline {
      border-color: var(--c-border);
      color: var(--c-text-light);
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.05);
      border-color: rgba(255, 255, 255, 0.2);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(13, 17, 23, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
    }
    .top-status-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      padding: 6px 0;
      font-size: 0.75rem;
      color: var(--c-text-muted-light);
    }
    .top-status-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .nav-main-bar {
      padding: 16px 0;
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #FFFFFF;
    }
    .brand-logo-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--c-primary);
      box-shadow: 0 0 10px var(--c-primary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.9rem;
      color: var(--c-text-muted-light);
      font-weight: 500;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--c-primary);
    }

    /* 板块 1: Hero 线索获客首屏 */
    .hero-section {
      position: relative;
      padding: 80px 0 100px;
      background-image: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.08) 0%, transparent 50%),
                        linear-gradient(180deg, rgba(13,17,23,0.85) 0%, rgba(13,17,23,0.98) 100%),
                        url('/assets/images/a12f5b418d4b1751.png');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--c-border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-lead-badge { margin-bottom: 20px; }
    .hero-title {
      font-size: 3.25rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .hero-title span {
      background: linear-gradient(135deg, #FFFFFF 30%, var(--c-primary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.05rem;
      line-height: 1.75;
      color: var(--c-text-muted-light);
      margin-bottom: 32px;
    }
    .hero-stats-row {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--c-border);
    }
    .hero-stat-item h4 {
      font-size: 1.75rem;
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--c-primary);
    }
    .hero-stat-item p {
      font-size: 0.8rem;
      color: var(--c-text-muted-light);
    }

    .hero-form-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
      position: relative;
    }
    .hero-form-card::before {
      content: "";
      position: absolute;
      top: -1px; left: -1px; right: -1px;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
    }
    .form-head { margin-bottom: 24px; }
    .form-head h3 { font-size: 1.35rem; font-weight: 700; margin-bottom: 8px; }
    .form-head p { font-size: 0.85rem; color: var(--c-text-muted-light); }
    .form-group { margin-bottom: 16px; }
    .form-label { display: block; font-size: 0.85rem; margin-bottom: 6px; color: var(--c-text-muted-light); }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      background: #0B0E14;
      border: 1px solid var(--c-border);
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--c-primary);
      box-shadow: 0 0 0 2px rgba(0, 229, 153, 0.2);
    }
    .form-agreement {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 0.75rem;
      color: var(--c-text-muted-light);
      margin-bottom: 20px;
    }
    .form-agreement input { margin-top: 3px; accent-color: var(--c-primary); }

    /* 板块 2: 内容日历 */
    .calendar-section {
      padding: 80px 0;
      background: #0B0E14;
      border-bottom: 1px solid var(--c-border);
    }
    .calendar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .cal-item {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }
    .cal-item:hover {
      border-color: rgba(0, 229, 153, 0.4);
      transform: translateY(-4px);
    }
    .cal-time {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--c-primary);
      margin-bottom: 8px;
    }
    .cal-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
    .cal-desc { font-size: 0.85rem; color: var(--c-text-muted-light); line-height: 1.6; }

    /* 板块 3: 热门专题 */
    .topics-section {
      padding: 90px 0;
      background: var(--c-bg-light);
      color: var(--c-text-dark);
      border-bottom: 1px solid var(--c-border-light);
    }
    .topics-section .section-title { color: var(--c-text-dark); }
    .topics-section .section-desc { color: var(--c-text-muted-dark); }
    .topic-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .topic-card {
      background: var(--c-card-light);
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border-light);
      overflow: hidden;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .topic-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    }
    .topic-img-wrapper {
      height: 180px;
      overflow: hidden;
      background: #E2E8F0;
    }
    .topic-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .topic-card:hover .topic-img-wrapper img { transform: scale(1.05); }
    .topic-content { padding: 24px; flex: 1; display: flex; flex-direction: column; }
    .topic-meta { font-size: 0.75rem; color: #64748B; margin-bottom: 8px; font-weight: 600; text-transform: uppercase; }
    .topic-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: #0F172A; }
    .topic-text { font-size: 0.9rem; color: #475569; line-height: 1.6; margin-bottom: 16px; flex: 1; }
    .topic-link { font-size: 0.85rem; font-weight: 600; color: #0284C7; display: inline-flex; align-items: center; gap: 4px; }

    /* 板块 4: 观点解读 */
    .insights-section {
      padding: 90px 0;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
    }
    .insights-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .insight-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 32px;
      position: relative;
    }
    .insight-quote {
      font-size: 1.15rem;
      line-height: 1.65;
      font-style: italic;
      color: #E2E8F0;
      margin-bottom: 24px;
    }
    .insight-author {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .author-info h5 { font-size: 1rem; font-weight: 700; color: var(--c-primary); }
    .author-info p { font-size: 0.8rem; color: var(--c-text-muted-light); }

    /* 板块 5: 算法级运动表现对比 */
    .comparison-section {
      padding: 90px 0;
      background: #0B0E14;
      border-bottom: 1px solid var(--c-border);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--c-border);
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      text-align: left;
      font-size: 0.9rem;
      border-bottom: 1px solid var(--c-border);
    }
    .compare-table th {
      background: rgba(255, 255, 255, 0.03);
      color: var(--c-text-muted-light);
      font-weight: 600;
    }
    .compare-table td { background: var(--c-bg-card); }
    .compare-table tr:last-child td { border-bottom: none; }
    .metric-name { font-weight: 600; color: #FFFFFF; }
    .val-trad { color: var(--c-text-muted-light); }
    .val-ai { color: var(--c-primary); font-weight: 700; }

    /* 板块 6: 资讯列表 */
    .news-section {
      padding: 90px 0;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
    }
    .news-layout {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 32px;
    }
    .news-main-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .news-main-img { height: 260px; }
    .news-main-img img { width: 100%; height: 100%; object-fit: cover; }
    .news-main-body { padding: 24px; }
    .news-tag { font-size: 0.75rem; color: var(--c-primary); font-weight: 600; margin-bottom: 8px; }
    .news-main-title { font-size: 1.35rem; font-weight: 700; margin-bottom: 12px; }
    .news-main-desc { font-size: 0.9rem; color: var(--c-text-muted-light); line-height: 1.6; }
    .news-side-list { display: flex; flex-direction: column; gap: 16px; }
    .news-side-item {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
    }
    .news-side-item:hover { border-color: rgba(255, 255, 255, 0.2); }
    .news-side-date { font-size: 0.75rem; color: var(--c-text-muted-light); font-family: var(--font-mono); margin-bottom: 4px; }
    .news-side-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
    .news-side-item p { font-size: 0.85rem; color: var(--c-text-muted-light); }

    /* 板块 7: 研发演进与竞技里程碑 */
    .timeline-section {
      padding: 90px 0;
      background: #0B0E14;
      border-bottom: 1px solid var(--c-border);
    }
    .timeline-track {
      position: relative;
      max-width: 860px;
      margin: 0 auto;
      padding: 20px 0;
    }
    .timeline-track::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--c-border);
      transform: translateX(-50%);
    }
    .timeline-node {
      position: relative;
      margin-bottom: 48px;
      width: 50%;
    }
    .timeline-node.left { left: 0; padding-right: 40px; text-align: right; }
    .timeline-node.right { left: 50%; padding-left: 40px; text-align: left; }
    .timeline-dot {
      position: absolute;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--c-primary);
      box-shadow: 0 0 10px var(--c-primary);
    }
    .timeline-node.left .timeline-dot { right: -7px; }
    .timeline-node.right .timeline-dot { left: -7px; }
    .timeline-badge { font-family: var(--font-mono); font-size: 0.8rem; color: var(--c-primary); margin-bottom: 6px; font-weight: 700; }
    .timeline-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
    .timeline-text { font-size: 0.85rem; color: var(--c-text-muted-light); line-height: 1.6; }

    /* 板块 8: 媒体精选与行业发声 */
    .press-section {
      padding: 80px 0;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
    }
    .press-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .press-card {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      background: rgba(255, 255, 255, 0.02);
      text-align: center;
    }
    .press-source { font-size: 0.8rem; font-weight: 700; color: var(--c-primary); margin-bottom: 12px; }
    .press-card blockquote { font-size: 0.85rem; color: var(--c-text-muted-light); line-height: 1.6; }

    /* 板块 9: 数据分析指标看板 */
    .metrics-section {
      padding: 90px 0;
      background-image: linear-gradient(180deg, #0B0E14 0%, #161B22 100%);
      border-bottom: 1px solid var(--c-border);
    }
    .metrics-banner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-big-card {
      background: rgba(13, 17, 23, 0.7);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      position: relative;
    }
    .metric-big-val {
      font-size: 3rem;
      font-family: var(--font-mono);
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .metric-big-val span { font-size: 1.5rem; color: var(--c-primary); }
    .metric-label { font-size: 0.95rem; font-weight: 600; color: #E2E8F0; margin-bottom: 6px; }
    .metric-sub { font-size: 0.8rem; color: var(--c-text-muted-light); }

    /* 板块 10: 拼团拼单服务 */
    .groupbuy-section {
      padding: 90px 0;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
    }
    .groupbuy-rule-box {
      background: var(--c-bg-card);
      border: 1px solid rgba(0, 229, 153, 0.3);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }
    .groupbuy-steps { display: flex; gap: 24px; align-items: center; }
    .step-unit { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; }
    .step-idx {
      width: 24px; height: 24px;
      border-radius: 50%;
      background: var(--c-primary);
      color: #051A12;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
    }
    .groupbuy-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .groupbuy-card {
      background: var(--c-bg-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
    }
    .groupbuy-head { margin-bottom: 16px; }
    .groupbuy-tag { font-size: 0.75rem; color: var(--c-accent); font-weight: 700; margin-bottom: 4px; }
    .groupbuy-title { font-size: 1.2rem; font-weight: 700; }
    .groupbuy-progress-wrapper { margin: 16px 0; }
    .progress-labels { display: flex; justify-content: space-between; font-size: 0.8rem; margin-bottom: 6px; }
    .progress-bar-bg { width: 100%; height: 6px; background: rgba(255, 255, 255, 0.1); border-radius: var(--radius-full); overflow: hidden; }
    .progress-bar-fill { height: 100%; background: var(--c-primary); border-radius: var(--radius-full); }
    .groupbuy-pricing { margin: 16px 0 24px; }
    .groupbuy-pricing .price-num { font-size: 1.8rem; font-family: var(--font-mono); font-weight: 800; color: #FFFFFF; }
    .groupbuy-pricing .price-origin { font-size: 0.85rem; color: var(--c-text-muted-light); text-decoration: line-through; margin-left: 8px; }

    /* 板块 11: 平台数据安全保障 */
    .security-section {
      padding: 80px 0;
      background: #0B0E14;
      border-bottom: 1px solid var(--c-border);
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .security-card {
      padding: 24px;
      background: var(--c-bg);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      text-align: center;
    }
    .security-card h4 { font-size: 1rem; margin-bottom: 12px; }
    .security-card p { font-size: 0.85rem; color: var(--c-text-muted-light); }

    /* 板块 12: 快速解答与常见问题 */
    .faq-section {
      padding: 90px 0;
      background: var(--c-bg);
      border-bottom: 1px solid var(--c-border);
    }
    .faq-wrapper { max-width: 800px; margin: 0 auto; }
    .faq-item {
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      background: var(--c-bg-card);
    }
    .faq-question {
      width: 100%;
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: transparent;
      color: #FFFFFF;
      font-weight: 600;
      cursor: pointer;
      border: none;
      text-align: left;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.9rem;
      color: var(--c-text-muted-light);
      line-height: 1.7;
    }

    /* 板块 13: 转化表单 */
    .contact-section {
      padding: 90px 0;
      background: #0B0E14;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .contact-info h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 20px; }
    .contact-info p { font-size: 1.1rem; color: var(--c-text-muted-light); margin-bottom: 32px; }
    .contact-list { list-style: none; }
    .contact-list li { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; font-size: 0.95rem; }

    /* 页脚 */
    .site-footer {
      padding: 80px 0 40px;
      background: #05080C;
      border-top: 1px solid var(--c-border);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 60px;
    }
    .footer-col h5 { font-size: 1rem; margin-bottom: 20px; color: #FFFFFF; }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { font-size: 0.9rem; color: var(--c-text-muted-light); }
    .footer-links a:hover { color: var(--c-primary); }
    .footer-bottom {
      text-align: center;
      font-size: 0.8rem;
      color: var(--c-text-muted-light);
      padding-top: 40px;
      border-top: 1px solid var(--c-border);
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .calendar-grid { grid-template-columns: repeat(2, 1fr); }
      .groupbuy-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
      .timeline-track::before { left: 20px; }
      .timeline-node { width: 100%; padding-left: 50px; text-align: left; }
      .timeline-node.left, .timeline-node.right { left: 0; padding-right: 0; }
      .timeline-dot { left: 13px !important; }
    }