/* roulang page: index */
:root {
      --primary-blue: #0F52BA;
      --primary-dark: #0A3A85;
      --accent-cyan: #00A8E8;
      --dark-navy: #0B132B;
      --dark-surface: #1C2541;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --card-radius: 12px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 16px 32px -4px rgba(15, 82, 186, 0.12);
      --container-max: 1280px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-wrap {
      padding: 92px 0;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .sec-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px;
    }
    .sec-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 9999px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary-blue);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .sec-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 18px;
      line-height: 1.35;
    }
    .sec-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 6px;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      min-height: 48px;
    }
    .btn-primary {
      background-color: var(--primary-blue);
      color: #fff;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 8px 20px rgba(15, 82, 186, 0.25);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: #fff;
    }
    .btn-outline:hover {
      border-color: var(--primary-blue);
      color: var(--primary-blue);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
    }
    .top-bar {
      background: #0B132B;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }
    .main-nav {
      padding: 16px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 26px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-body);
      transition: color 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-blue);
    }
    .hero-crowd {
      padding: 72px 0 84px;
      background: linear-gradient(180deg, #F0F6FF 0%, #F8FAFC 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 22px;
    }
    .hero-content h1 span {
      color: var(--primary-blue);
    }
    .hero-summary {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.85;
      margin-bottom: 32px;
    }
    .hero-support-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .progress-bar-wrap {
      margin-bottom: 24px;
    }
    .progress-labels {
      display: flex;
      justify-content: space-between;
      margin-bottom: 10px;
      font-weight: 700;
      font-size: 14px;
      color: var(--text-main);
    }
    .progress-track {
      width: 100%;
      height: 12px;
      background: #E2E8F0;
      border-radius: 9999px;
      overflow: hidden;
    }
    .progress-fill {
      width: 94.6%;
      height: 100%;
      background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
      border-radius: 9999px;
    }
    .crowd-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      text-align: center;
      margin-bottom: 28px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .c-stat-val {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary-blue);
      line-height: 1.2;
    }
    .c-stat-lbl {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }
    .tier-preview-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
    }
    .tier-item {
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #F8FAFC;
    }
    .tier-item span {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }
    .tier-badge {
      font-size: 12px;
      background: #DBEAFE;
      color: var(--primary-blue);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .cat-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .cat-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .cat-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: rgba(15, 82, 186, 0.3);
    }
    .cat-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: #EFF6FF;
      color: var(--primary-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .cat-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .cat-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .cat-meta {
      font-size: 13px;
      color: var(--accent-cyan);
      font-weight: 600;
    }
    .near-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .near-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .near-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .near-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .near-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .near-card:hover .near-thumb img {
      transform: scale(1.05);
    }
    .near-body {
      padding: 24px;
    }
    .near-tag {
      font-size: 12px;
      color: var(--primary-blue);
      background: #EFF6FF;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 12px;
    }
    .near-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .near-body p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .near-foot {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--text-muted);
    }
    .rank-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .rank-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .rank-num {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 32px;
      font-weight: 900;
      color: #E2E8F0;
    }
    .rank-score {
      display: flex;
      align-items: center;
      gap: 6px;
      color: #F59E0B;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .rank-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .rank-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .rank-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #334155;
    }
    .author-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }
    .dark-section {
      background: var(--dark-navy);
      color: #fff;
    }
    .dark-section .sec-title {
      color: #fff;
    }
    .dark-section .sec-desc {
      color: #94A3B8;
    }
    .dark-section .sec-badge {
      background: rgba(0, 168, 232, 0.15);
      color: var(--accent-cyan);
    }
    .arch-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .arch-card {
      background: var(--dark-surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--card-radius);
      padding: 32px 28px;
    }
    .arch-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }
    .arch-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .arch-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .arch-list li {
      font-size: 13px;
      color: #CBD5E1;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .arch-list li::before {
      content: "✓";
      color: var(--accent-cyan);
      font-weight: 800;
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .flow-step-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-index {
      width: 36px;
      height: 36px;
      background: var(--primary-blue);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      margin-bottom: 18px;
    }
    .flow-step-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .flow-step-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }
    .metrics-bar {
      background: linear-gradient(135deg, #0F52BA, #0A3A85);
      color: #fff;
      padding: 56px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .m-val {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 8px;
      color: #FFFFFF;
    }
    .m-lbl {
      font-size: 15px;
      color: #BFDBFE;
      font-weight: 500;
    }
    .aud-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .aud-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .aud-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .aud-icon {
      font-size: 32px;
      margin-bottom: 16px;
    }
    .aud-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .aud-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      justify-content: space-between;
    }
    .news-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .news-link {
      color: var(--primary-blue);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
    }
    .faq-q {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
    }
    .faq-q::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.2s;
    }
    .faq-item.active .faq-q::after {
      content: "−";
    }
    .faq-a {
      padding: 0 28px 22px;
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.8;
      display: none;
    }
    .faq-item.active .faq-a {
      display: block;
    }
    .form-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }
    .form-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .lead-form {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      padding: 36px;
      border-radius: var(--card-radius);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      background: #fff;
      transition: border-color 0.2s;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary-blue);
    }
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 64px 0 28px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: #fff;
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }
    @media (max-width: 1024px) {
      .cat-grid, .aud-grid, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-top: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-cta { display: none; }
      .hero-grid, .form-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-content h1 { font-size: 30px; }
      .sec-title { font-size: 26px; }
      .near-grid, .rank-grid, .arch-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap { padding: 56px 0; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }