/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-dark: #3730A3;
      --secondary: #06B6D4;
      --accent: #10B981;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --light-bg: #F8FAFC;
      --light-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.8);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -8px rgba(79, 70, 229, 0.12);
    }

    * { box-sizing: border-box; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: #FFFFFF;
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 0.8rem;
    }
    p { margin-bottom: 1.25rem; font-size: 1rem; color: var(--text-body); }
    a { text-decoration: none; transition: all 0.25s ease; color: var(--primary); }
    a:hover { color: var(--primary-dark); }

    .site-topbar {
      background-color: var(--dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 0.5rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-topbar a { color: #CBD5E1; }
    .site-topbar a:hover { color: #FFFFFF; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px -2px rgba(0,0,0,0.03);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.9rem 0;
    }
    .logo-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.375rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
    }
    .logo-brand i {
      color: var(--primary);
      font-size: 1.6rem;
    }
    .btn-header-cta {
      background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%);
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 0.925rem;
      padding: 0.65rem 1.4rem;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
    }
    .btn-header-cta:hover {
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.38);
      transform: translateY(-1px);
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background-color: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      padding: 0.3rem 0.9rem;
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }
    .section-head {
      margin-bottom: 3.5rem;
    }
    .section-head.text-center {
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-head h2 {
      font-size: 2.125rem;
      margin-bottom: 0.75rem;
    }
    .section-head p {
      font-size: 1.0625rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .landing-section {
      padding: 5.5rem 0;
      position: relative;
    }
    .bg-light-1 { background-color: var(--light-bg); }
    .bg-light-2 { background-color: var(--light-alt); }
    .bg-white { background-color: #FFFFFF; }
    .bg-dark-contrast {
      background-color: var(--dark);
      color: #E2E8F0;
    }
    .bg-dark-contrast h2, .bg-dark-contrast h3, .bg-dark-contrast h4 {
      color: #FFFFFF;
    }
    .bg-dark-contrast p {
      color: #94A3B8;
    }

    .hero-split-section {
      padding: 4.5rem 0 5.5rem;
      background: radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.04) 0%, rgba(255, 255, 255, 0) 50%),
                  radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.05) 0%, rgba(255, 255, 255, 0) 60%),
                  #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-title {
      font-size: 2.65rem;
      letter-spacing: -0.5px;
      margin-bottom: 1.25rem;
    }
    .hero-desc {
      font-size: 1.125rem;
      line-height: 1.85;
      color: var(--text-body);
      margin-bottom: 2rem;
    }
    .hero-compare-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }
    .hero-compare-header {
      display: grid;
      grid-template-columns: 1fr 1fr;
      text-align: center;
      background: var(--light-alt);
      border-bottom: 1px solid var(--border-color);
      font-weight: 700;
      font-size: 0.95rem;
    }
    .hero-compare-header div { padding: 0.9rem; }
    .hero-compare-header .col-after {
      background: rgba(16, 185, 129, 0.08);
      color: #065F46;
      border-left: 1px solid var(--border-color);
    }
    .hero-compare-header .col-before {
      color: var(--text-muted);
    }
    .hero-compare-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.875rem;
    }
    .hero-compare-row:last-child { border-bottom: none; }
    .hero-compare-row .cell-before {
      padding: 1.1rem;
      background: #FFFFFF;
      color: #64748B;
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }
    .hero-compare-row .cell-after {
      padding: 1.1rem;
      background: rgba(16, 185, 129, 0.03);
      color: var(--dark);
      font-weight: 600;
      border-left: 1px solid var(--border-color);
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }

    .card-modern {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.2rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }
    .card-modern:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.3);
    }
    .card-icon {
      width: 52px;
      height: 52px;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 1.25rem;
    }
    .card-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 1.25rem;
      position: relative;
    }
    .card-img-wrap img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .card-modern:hover .card-img-wrap img {
      transform: scale(1.04);
    }

    .card-dark {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 2.2rem;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    }
    .card-dark h3, .card-dark h4 { color: #FFFFFF; }
    .card-dark p { color: #94A3B8; }

    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .story-img {
      height: 100%;
      min-height: 260px;
      object-fit: cover;
      width: 100%;
    }

    .metric-counter {
      text-align: center;
      padding: 1.5rem 1rem;
    }
    .metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -1px;
      margin-bottom: 0.4rem;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .flow-step-box {
      position: relative;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.8rem 1.4rem;
      text-align: center;
      height: 100%;
    }
    .flow-step-num {
      width: 38px;
      height: 38px;
      background: var(--primary);
      color: #FFFFFF;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 1rem;
      box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
    }

    .news-compact-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.8rem;
      transition: all 0.3s ease;
      height: 100%;
    }
    .news-compact-item:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 0.6rem;
    }

    .table-custom {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .table-custom th {
      background: var(--light-alt);
      padding: 1.2rem;
      text-align: left;
      font-weight: 700;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
    }
    .table-custom td {
      padding: 1.2rem;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-body);
    }
    .table-custom tr:last-child td { border-bottom: none; }
    .table-custom .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    .btn-solid-primary {
      background: var(--primary);
      color: #FFFFFF !important;
      padding: 0.85rem 1.8rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.28);
    }
    .btn-solid-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.36);
    }
    .btn-outline-dark {
      border: 1px solid #CBD5E1;
      color: var(--dark) !important;
      background: #FFFFFF;
      padding: 0.85rem 1.8rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline-dark:hover {
      border-color: var(--dark);
      background: var(--light-alt);
    }

    .site-footer {
      background-color: #0A0F1D;
      color: #94A3B8;
      padding: 4.5rem 0 2.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9375rem;
    }
    .site-footer h4 {
      color: #FFFFFF;
      font-size: 1.125rem;
      margin-bottom: 1.3rem;
    }
    .site-footer a { color: #94A3B8; }
    .site-footer a:hover { color: #FFFFFF; }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 3.5rem;
      padding-top: 1.8rem;
      text-align: center;
      font-size: 0.85rem;
    }

    @media screen and (max-width: 768px) {
      .hero-title { font-size: 2.1rem; }
      .landing-section { padding: 3.8rem 0; }
      .section-head h2 { font-size: 1.75rem; }
      .metric-number { font-size: 2.2rem; }
      .hero-compare-header, .hero-compare-row { grid-template-columns: 1fr; }
      .hero-compare-header .col-after { border-left: none; border-top: 1px solid var(--border-color); }
      .hero-compare-row .cell-after { border-left: none; border-top: 1px solid var(--border-color); }
    }