/* roulang page: index */
:root {
      --primary: #0052CC;
      --primary-hover: #0747A6;
      --accent: #FF6B35;
      --accent-hover: #E85924;
      --dark: #0D172A;
      --dark-card: #1E293B;
      --text: #2D3748;
      --muted: #64748B;
      --light-bg: #F8FAFC;
      --border: #E2E8F0;
      --card-bg: #FFFFFF;
      --radius: 8px;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 12px 28px rgba(0, 82, 204, 0.1);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text);
      background-color: #FFFFFF;
      line-height: 1.68;
      font-size: 15px;
      -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 {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .header-topbar {
      background: #0B132B;
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 8px 0;
    }
    .header-topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .topbar-info {
      display: flex;
      gap: 20px;
    }
    .topbar-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .topbar-badge {
      background: rgba(255, 107, 53, 0.2);
      color: #FF8F6B;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
    }
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
    }
    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 20px;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      color: #334155;
      font-size: 14px;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
      font-size: 14px;
      text-align: center;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 12px rgba(0, 82, 204, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 14px rgba(255, 107, 53, 0.28);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--border);
      color: var(--text);
      background: #fff;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #F0F7FF;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--dark);
    }
    section {
      padding: 72px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--light-bg);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-dark {
      background-color: var(--dark);
      color: #fff;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      text-transform: uppercase;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--primary);
      background: rgba(0, 82, 204, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-tag.tag-light {
      background: rgba(255, 255, 255, 0.12);
      color: #93C5FD;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
      color: var(--dark);
      letter-spacing: -0.5px;
    }
    .section-dark .section-title {
      color: #fff;
    }
    .section-desc {
      font-size: 16px;
      color: var(--muted);
      max-width: 820px;
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    .hero-live {
      position: relative;
      background-image: linear-gradient(rgba(13, 23, 42, 0.88), rgba(13, 23, 42, 0.95)), url('/assets/images/backpic/back-1.jpg');
      background-size: cover;
      background-position: center;
      color: #fff;
      padding: 96px 0 84px;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge-live {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 107, 53, 0.2);
      border: 1px solid rgba(255, 107, 53, 0.4);
      color: #FF9B71;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent);
      animation: pulse 1.6s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.4; }
      50% { opacity: 1; }
      100% { opacity: 0.4; }
    }
    .hero-content h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.22;
      margin-bottom: 20px;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .hero-content p {
      font-size: 16px;
      color: #CBD5E1;
      margin-bottom: 30px;
      line-height: 1.75;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .live-panel {
      background: rgba(30, 41, 59, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 12px;
      padding: 28px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      backdrop-filter: blur(12px);
    }
    .live-panel-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .countdown-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-bottom: 24px;
    }
    .countdown-card {
      background: rgba(15, 23, 42, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 6px;
      padding: 12px 6px;
      text-align: center;
    }
    .countdown-number {
      font-size: 26px;
      font-weight: 800;
      color: #38BDF8;
      font-variant-numeric: tabular-nums;
    }
    .countdown-label {
      font-size: 11px;
      color: #94A3B8;
      margin-top: 2px;
    }
    .live-meta-list {
      list-style: none;
      margin-bottom: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 16px;
    }
    .live-meta-item {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: #CBD5E1;
      margin-bottom: 10px;
    }
    .live-meta-item span:first-child {
      color: #94A3B8;
    }
    .subscribe-box {
      display: flex;
      gap: 8px;
    }
    .subscribe-box input {
      flex: 1;
      padding: 12px 14px;
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: var(--radius);
      color: #fff;
      font-size: 13px;
    }
    .subscribe-box input:focus {
      outline: none;
      border-color: #38BDF8;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 36px;
    }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow);
      border-color: #CBD5E1;
    }
    .card-thumb {
      border-radius: 6px;
      overflow: hidden;
      margin-bottom: 18px;
      height: 180px;
      position: relative;
    }
    .card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .card:hover .card-thumb img {
      transform: scale(1.04);
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--dark);
    }
    .card-text {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.68;
    }
    .param-badge-row {
      display: flex;
      gap: 8px;
      margin: 14px 0 16px;
      flex-wrap: wrap;
    }
    .param-badge {
      background: #F1F5F9;
      color: #475569;
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .stat-counter-box {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #0046B3;
      border-radius: 12px;
      padding: 40px 32px;
      color: #fff;
      box-shadow: var(--shadow-lg);
    }
    .stat-item {
      text-align: center;
      border-right: 1px solid rgba(255,255,255,0.15);
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-num {
      font-size: 38px;
      font-weight: 900;
      letter-spacing: -1px;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .stat-num em {
      font-style: normal;
      color: #FF9B71;
      font-size: 24px;
    }
    .stat-desc {
      font-size: 13px;
      color: #BFDBFE;
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .flow-step-num {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 14px;
    }
    .flow-step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--dark);
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-text {
      font-size: 14px;
      color: #475569;
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #0F172A;
      font-size: 14px;
    }
    .user-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark);
    }
    .user-meta p {
      font-size: 12px;
      color: var(--muted);
    }
    .article-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .article-thumb {
      height: 190px;
      overflow: hidden;
    }
    .article-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .article-card:hover .article-thumb img {
      transform: scale(1.05);
    }
    .article-body {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .article-date {
      font-size: 12px;
      color: var(--muted);
      margin-bottom: 8px;
    }
    .article-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
      color: var(--dark);
    }
    .article-body p {
      font-size: 13px;
      color: #64748B;
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .partner-row {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 32px;
      padding: 10px 0;
    }
    .partner-item {
      font-size: 15px;
      font-weight: 700;
      color: #94A3B8;
      letter-spacing: 0.5px;
      padding: 8px 16px;
      background: #F8FAFC;
      border: 1px dashed #CBD5E1;
      border-radius: 6px;
    }
    .partner-item:hover {
      color: var(--primary);
      border-color: var(--primary);
    }
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: #FFFFFF;
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
    }
    .faq-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .security-strip {
      background: #0B132B;
      color: #CBD5E1;
      padding: 44px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .security-box {
      border-left: 2px solid var(--accent);
      padding-left: 18px;
    }
    .security-box h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
    }
    .security-box p {
      font-size: 12px;
      color: #94A3B8;
      line-height: 1.6;
    }
    .contact-form-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 36px;
      box-shadow: var(--shadow);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #334155;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-size: 14px;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
    }
    footer.site-footer {
      background: #070D1E;
      color: #94A3B8;
      padding: 64px 0 24px;
      font-size: 13px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
      color: #64748B;
    }
    .footer-bottom-links {
      display: flex;
      gap: 18px;
    }
    .footer-bottom-links a:hover {
      color: #CBD5E1;
    }
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-counter-box {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-item:nth-child(2) {
        border-right: none;
      }
      .stat-item {
        border-bottom: 1px solid rgba(255,255,255,0.15);
        padding-bottom: 18px;
      }
      .stat-item:nth-child(3), .stat-item:nth-child(4) {
        border-bottom: none;
        padding-top: 18px;
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .header-topbar {
        display: none;
      }
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .stat-counter-box {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255,255,255,0.15);
        padding-bottom: 16px;
      }
      .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .security-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      section {
        padding: 52px 0;
      }
    }