/* roulang page: index */
:root {
      --bg-dark: #0F141C;
      --bg-card: #18202C;
      --bg-light: #F5F7FA;
      --primary: #00E599;
      --primary-hover: #00C885;
      --accent: #00A3FF;
      --text-main: #F1F5F9;
      --text-muted: #94A3B8;
      --text-dark: #1E293B;
      --border-color: rgba(148, 163, 184, 0.15);
      --border-highlight: rgba(0, 229, 153, 0.4);
      --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-glow: 0 10px 30px -10px rgba(0, 229, 153, 0.2);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(15, 20, 28, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .top-bar {
      background: #090D13;
      font-size: 13px;
      color: var(--text-muted);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .main-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      font-size: 20px;
      font-weight: 700;
      color: #FFF;
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.5px;
    }
    .brand-logo .dot {
      width: 10px;
      height: 10px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      min-height: 44px;
    }
    .btn-primary {
      background: var(--primary);
      color: #0F141C;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: var(--shadow-glow);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.03);
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(0, 163, 255, 0.08);
    }
    .section-spacing {
      padding: 80px 0;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 229, 153, 0.1);
      border: 1px solid var(--border-highlight);
      color: var(--primary);
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 720px;
      line-height: 1.7;
    }
    .hero-banner {
      position: relative;
      background-size: cover;
      background-position: center;
      padding: 100px 0 70px;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .hero-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(15,20,28,0.85) 0%, rgba(15,20,28,0.96) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-intro {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.8;
      margin-bottom: 36px;
    }
    .roadmap-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      gap: 16px;
      margin-top: 40px;
    }
    .roadmap-item {
      position: relative;
      padding-left: 18px;
    }
    .roadmap-item::before {
      content: "";
      position: absolute;
      left: 0;
      top: 6px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
    }
    .roadmap-item.completed::before { background: var(--accent); }
    .roadmap-item.pending::before { background: var(--text-muted); }
    .roadmap-tag {
      font-size: 12px;
      color: var(--text-muted);
      font-family: var(--font-mono);
      margin-bottom: 4px;
    }
    .roadmap-name {
      font-size: 14px;
      font-weight: 600;
      color: #FFF;
    }
    .sub-bar-flex {
      display: flex;
      gap: 16px;
      align-items: center;
      margin-top: 30px;
    }
    .sub-input {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 10px 16px;
      color: #FFF;
      font-size: 14px;
      width: 320px;
      min-height: 44px;
    }
    .sub-input:focus {
      outline: none;
      border-color: var(--primary);
    }
    .news-portal-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 32px;
    }
    .stream-feed-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .feed-card {
      display: grid;
      grid-template-columns: 200px 1fr;
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: transform 0.25s ease, border-color 0.25s ease;
    }
    .feed-card:hover {
      transform: translateY(-2px);
      border-color: var(--border-highlight);
    }
    .feed-card-thumb {
      height: 100%;
      min-height: 140px;
      object-fit: cover;
      width: 100%;
    }
    .feed-card-body {
      padding: 18px 18px 18px 0;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feed-card-meta {
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 6px;
      display: flex;
      gap: 12px;
    }
    .feed-card-title {
      font-size: 17px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 8px;
    }
    .feed-card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .side-rank-board {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .rank-board-title {
      font-size: 18px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .rank-board-title span {
      font-size: 12px;
      color: var(--primary);
    }
    .rank-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .rank-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .rank-num {
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      flex-shrink: 0;
    }
    .rank-item:nth-child(1) .rank-num { background: var(--primary); color: #0F141C; }
    .rank-item:nth-child(2) .rank-num { background: var(--accent); color: #FFF; }
    .rank-info-title {
      font-size: 14px;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 4px;
    }
    .rank-info-sub {
      font-size: 12px;
      color: var(--text-muted);
    }
    .topic-track {
      background: #131A24;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 24px 0;
    }
    .topic-badges {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
    }
    .topic-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }
    .topic-chip {
      padding: 8px 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 13px;
      color: var(--text-main);
    }
    .topic-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }
    .kpi-table-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    .kpi-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .kpi-table th, .kpi-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .kpi-table th {
      background: rgba(255, 255, 255, 0.02);
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }
    .kpi-table td {
      font-size: 14px;
      color: var(--text-main);
    }
    .status-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 2px 10px;
      border-radius: 12px;
      font-size: 12px;
      background: rgba(0, 229, 153, 0.1);
      color: var(--primary);
      font-weight: 600;
    }
    .status-pill::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
    }
    .media-partners-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .partner-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: all 0.25s ease;
    }
    .partner-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }
    .partner-logo-box {
      font-size: 16px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 8px;
    }
    .partner-scope {
      font-size: 13px;
      color: var(--text-muted);
    }
    .subscribe-app-box {
      background: linear-gradient(135deg, #131A24 0%, #1A2535 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 50px;
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .app-meta-list {
      display: flex;
      gap: 20px;
      margin-top: 24px;
    }
    .app-badge-item {
      padding: 12px 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .app-badge-item b {
      display: block;
      font-size: 14px;
      color: #FFF;
    }
    .app-badge-item small {
      font-size: 11px;
      color: var(--text-muted);
    }
    .feature-triad-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
    }
    .feature-card-metric {
      font-size: 32px;
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .feature-card h3 {
      font-size: 18px;
      color: #FFF;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .scene-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .scene-card-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .scene-card-body {
      padding: 24px;
    }
    .scene-card-body h3 {
      font-size: 18px;
      color: #FFF;
      margin-bottom: 12px;
    }
    .scene-card-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .pricing-tiers-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pricing-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .pricing-card.featured {
      border-color: var(--primary);
      box-shadow: 0 0 25px rgba(0, 229, 153, 0.15);
      position: relative;
    }
    .featured-ribbon {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--primary);
      color: #0F141C;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .tier-name {
      font-size: 20px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 8px;
    }
    .tier-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .tier-features {
      list-style: none;
      margin-bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .tier-features li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tier-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }
    .proof-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #090D13;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px;
      text-align: center;
    }
    .proof-val {
      font-size: 38px;
      font-weight: 800;
      font-family: var(--font-mono);
      color: #FFF;
      margin-bottom: 6px;
    }
    .proof-val span {
      color: var(--primary);
    }
    .proof-lbl {
      font-size: 14px;
      color: var(--text-muted);
    }
    .painpoint-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .painpoint-item {
      display: grid;
      grid-template-columns: 80px 1fr 1fr;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      align-items: center;
      gap: 20px;
    }
    .painpoint-code {
      font-size: 16px;
      font-family: var(--font-mono);
      color: var(--primary);
      font-weight: 700;
    }
    .painpoint-issue {
      font-size: 15px;
      font-weight: 600;
      color: #FFF;
    }
    .painpoint-sol {
      font-size: 14px;
      color: var(--text-muted);
    }
    .security-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .security-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .security-box h4 {
      font-size: 16px;
      color: #FFF;
      margin-bottom: 8px;
    }
    .security-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .conversion-terminal {
      background: linear-gradient(180deg, #131A24 0%, #0D1219 100%);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    .terminal-info h3 {
      font-size: 26px;
      color: #FFF;
      margin-bottom: 16px;
    }
    .terminal-info p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .service-guarantees {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .service-guarantees li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .service-guarantees li span {
      color: var(--accent);
      font-weight: bold;
    }
    .terminal-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      color: #FFF;
      font-size: 14px;
      min-height: 44px;
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
    }
    .site-footer {
      background: #090D13;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand-title {
      font-size: 18px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 14px;
    }
    .footer-brand-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 15px;
      color: #FFF;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col a {
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-col a:hover {
      color: var(--primary);
    }
    .footer-contact-info {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-muted);
    }
    @media (max-width: 1024px) {
      .news-portal-grid {grid-template-columns: 1fr; }
      .feature-triad-grid, .scene-grid, .pricing-tiers-grid { grid-template-columns: 1fr; }
      .proof-bar, .security-matrix, .media-partners-grid { grid-template-columns: repeat(2, 1fr); }
      .conversion-terminal { grid-template-columns: 1fr; gap: 32px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-links { display: none; }
      .hero-h1 { font-size: 30px; }
      .roadmap-bar { grid-template-columns: 1fr; }
      .feed-card { grid-template-columns: 1fr; }
      .feed-card-body { padding: 16px; }
      .subscribe-app-box { grid-template-columns: 1fr; padding: 28px; }
      .proof-bar, .security-matrix, .media-partners-grid { grid-template-columns: 1fr; }
      .painpoint-item { grid-template-columns: 1fr; gap: 8px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; }
      .sub-bar-flex { flex-direction: column; align-items: stretch; }
      .sub-input { width: 100%; }
    }