/* roulang page: index */
:root {
      --primary-dark: #1E1035;
      --primary-mid: #2D1B69;
      --primary-light: #442B8C;
      --accent-cyan: #00F2FE;
      --accent-magenta: #9B51E0;
      --accent-cyan-rgb: 0, 242, 254;
      --bg-light: #F8FAFC;
      --bg-alt: #EEF2F6;
      --bg-deep: #0F0C20;
      --text-main: #1F2937;
      --text-muted: #4B5563;
      --border-soft: #E2E8F0;
      --radius-card: 20px;
      --radius-pill: 9999px;
      --shadow-smooth: 0 10px 25px -5px rgba(45, 27, 105, 0.05), 0 8px 10px -6px rgba(45, 27, 105, 0.01);
      --shadow-hover: 0 20px 30px -10px rgba(45, 27, 105, 0.12);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
    ul { list-style: none; margin: 0; padding: 0; }
    img { max-width: 100%; height: auto; display: block; }

    .site-topbar {
      background-color: #1E293B;
      color: #94A3B8;
      font-size: 12px;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-topbar .grid-x { align-items: center; justify-content: space-between; }
    .topbar-info span { margin-right: 18px; display: inline-flex; align-items: center; gap: 6px; }

    .site-header {
      background: #FFFFFF;
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-soft);
    }
    .header-nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .brand-logo {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary-mid) 0%, var(--accent-magenta) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
    }
    .brand-logo i { color: var(--accent-cyan); -webkit-text-fill-color: initial; }
    .nav-links { display: flex; align-items: center; gap: 28px; }
    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover { color: var(--accent-magenta); }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.3s ease;
    }
    .nav-links a:hover::after { width: 100%; }

    .btn-brand {
      background: linear-gradient(135deg, var(--primary-mid) 0%, #3B1C7E 100%);
      color: #FFFFFF !important;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      box-shadow: 0 4px 14px rgba(45, 27, 105, 0.25);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      cursor: pointer;
    }
    .btn-brand:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(45, 27, 105, 0.35);
      background: linear-gradient(135deg, #3B1C7E 0%, var(--accent-magenta) 100%);
    }

    .btn-accent {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      color: #0F0C20 !important;
      font-size: 15px;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 16px rgba(0, 242, 254, 0.3);
    }
    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 242, 254, 0.5);
    }

    .btn-outline-light {
      background: rgba(255, 255, 255, 0.08);
      color: #FFFFFF !important;
      border: 1px solid rgba(255, 255, 255, 0.25);
      font-size: 15px;
      font-weight: 600;
      padding: 12px 26px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      backdrop-filter: blur(8px);
    }
    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.18);
      border-color: #FFFFFF;
      transform: translateY(-2px);
    }

    .badge-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent-cyan);
      background: rgba(var(--accent-cyan-rgb), 0.1);
      border: 1px solid rgba(var(--accent-cyan-rgb), 0.35);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      letter-spacing: 0.5px;
    }
    .badge-indicator.dark {
      color: #38BDF8;
      background: rgba(56, 189, 248, 0.08);
      border-color: rgba(56, 189, 248, 0.25);
    }

    .section-wrap { padding: 80px 0; position: relative; }
    .bg-light-alt { background-color: var(--bg-alt); }
    .bg-deep-theme {
      background-color: var(--bg-deep);
      color: #E2E8F0;
      position: relative;
      overflow: hidden;
    }

    .section-header { margin-bottom: 52px; text-align: left; }
    .section-header.text-center { text-align: center; }
    .section-header h2 {
      font-size: 32px;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-top: 10px;
      color: var(--text-main);
    }
    .bg-deep-theme .section-header h2 { color: #FFFFFF; }
    .section-header p {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 780px;
      margin-top: 10px;
      line-height: 1.7;
    }
    .bg-deep-theme .section-header p { color: #94A3B8; }
    .section-header.text-center p { margin-left: auto; margin-right: auto; }

    .card-modern {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-smooth);
      transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
      position: relative;
      height: 100%;
    }
    .card-modern:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(155, 81, 224, 0.3);
    }

    .flash-sale-bar {
      background: linear-gradient(90deg, #1A0B2E 0%, #2D1457 50%, #1A0B2E 100%);
      border-bottom: 1px solid rgba(0, 242, 254, 0.2);
      color: #FFFFFF;
      padding: 12px 0;
      font-size: 14px;
    }
    .flash-container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
    .flash-tag { background: #E11D48; color: #FFF; font-weight: 700; font-size: 12px; padding: 2px 10px; border-radius: 4px; }
    .timer-boxes { display: inline-flex; gap: 6px; align-items: center; font-weight: 700; }
    .timer-unit { background: rgba(255, 255, 255, 0.12); padding: 2px 8px; border-radius: 4px; color: var(--accent-cyan); }

    .hero-slider-wrap {
      background: linear-gradient(135deg, #1E1035 0%, #2D1B69 55%, #160A2B 100%);
      color: #FFFFFF;
      position: relative;
      padding: 90px 0 100px;
      overflow: hidden;
    }
    .hero-slider-wrap::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: url('/assets/images/5585685677388ae4.webp') center/cover no-repeat;
      opacity: 0.18;
      mix-blend-mode: overlay;
      pointer-events: none;
    }
    .hero-slider-wrap .grid-container { position: relative; z-index: 2; }
    .hero-h1 {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -1px;
      margin: 16px 0 20px;
    }
    .hero-desc {
      font-size: 16px;
      color: #CBD5E1;
      margin-bottom: 32px;
      line-height: 1.8;
      max-width: 620px;
    }
    .hero-cta-group { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .hero-metric-card {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 16px;
      padding: 20px;
    }
    .hero-metric-card .num { font-size: 28px; font-weight: 800; color: var(--accent-cyan); }
    .hero-metric-card .lbl { font-size: 13px; color: #94A3B8; margin-top: 4px; }

    .service-card {
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: rgba(45, 27, 105, 0.06);
      color: var(--primary-mid);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }
    .service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
    .service-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 20px; }

    .spec-card {
      background: #FFFFFF;
      border-radius: 18px;
      padding: 24px;
      border: 1px solid var(--border-soft);
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .spec-icon {
      font-size: 24px;
      color: var(--accent-magenta);
      background: rgba(155, 81, 224, 0.1);
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      border: 1px solid var(--border-soft);
      padding: 36px;
      box-shadow: var(--shadow-smooth);
    }
    .compare-header {
      display: grid;
      grid-template-columns: 2fr 1.5fr 1.5fr;
      padding-bottom: 18px;
      border-bottom: 2px solid var(--border-soft);
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-row {
      display: grid;
      grid-template-columns: 2fr 1.5fr 1.5fr;
      padding: 20px 0;
      border-bottom: 1px solid var(--border-soft);
      align-items: center;
    }
    .compare-row:last-child { border-bottom: none; }
    .col-before { color: #E11D48; font-weight: 600; font-size: 14px; }
    .col-after { color: #10B981; font-weight: 700; font-size: 15px; }

    .sol-card {
      background: #FFFFFF;
      border-radius: 22px;
      padding: 32px;
      border: 1px solid var(--border-soft);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .sol-card .card-img {
      border-radius: 14px;
      overflow: hidden;
      margin-bottom: 22px;
      height: 170px;
    }
    .sol-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
    .sol-card ul li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .sol-card ul li i { color: #10B981; font-size: 13px; }

    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .timeline-step-card {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 24px;
      border: 1px solid var(--border-soft);
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-mid);
      color: #FFF;
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    .case-dark-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 22px;
      padding: 30px;
      backdrop-filter: blur(10px);
      height: 100%;
    }
    .case-badge {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-cyan);
      background: rgba(0, 242, 254, 0.15);
      padding: 3px 10px;
      border-radius: 6px;
      margin-bottom: 14px;
    }

    .stats-stripe {
      background: linear-gradient(135deg, #1E1035 0%, #2D1B69 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .stat-item { text-align: center; }
    .stat-item .val { font-size: 42px; font-weight: 900; color: var(--accent-cyan); line-height: 1.1; }
    .stat-item .lbl { font-size: 14px; color: #CBD5E1; margin-top: 8px; font-weight: 500; }

    .news-card {
      background: #FFFFFF;
      border-radius: 18px;
      padding: 24px;
      border: 1px solid var(--border-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .news-date { font-size: 12px; color: #94A3B8; margin-bottom: 8px; display: block; }
    .news-tag {
      font-size: 11px;
      font-weight: 600;
      color: var(--primary-mid);
      background: #EDE9FE;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }

    .faq-accordion .accordion-item {
      background: #FFFFFF;
      border-radius: 14px;
      margin-bottom: 14px;
      border: 1px solid var(--border-soft);
      overflow: hidden;
    }
    .faq-accordion .accordion-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-accordion .accordion-title:hover { background-color: #FAFAFA; color: var(--primary-mid); }
    .faq-accordion .accordion-content {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-accordion .accordion-item.active .accordion-content { display: block; }
    .faq-accordion .accordion-item.active .accordion-title i { transform: rotate(180deg); }

    .form-wrap {
      background: #FFFFFF;
      border-radius: 24px;
      padding: 40px;
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-smooth);
    }
    .form-group { margin-bottom: 20px; }
    .form-group label { font-size: 14px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; display: block; }
    .form-control {
      width: 100%;
      height: 48px;
      border-radius: 10px;
      border: 1px solid var(--border-soft);
      padding: 0 16px;
      font-size: 14px;
      color: var(--text-main);
      background-color: #F8FAFC;
      transition: all 0.25s ease;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-mid);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(45, 27, 105, 0.1);
    }
    select.form-control { appearance: auto; }
    textarea.form-control { height: 110px; padding: 12px 16px; resize: vertical; }

    .site-footer {
      background: #0B0817;
      color: #94A3B8;
      padding: 70px 0 30px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a:hover { color: var(--accent-cyan); }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      text-align: center;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .timeline-steps { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .site-topbar { display: none; }
      .nav-links { display: none; }
      .hero-h1 { font-size: 32px; }
      .hero-metrics-grid { grid-template-columns: 1fr; }
      .compare-header, .compare-row { grid-template-columns: 1fr; gap: 8px; }
      .timeline-steps { grid-template-columns: 1fr; }
      .section-wrap { padding: 48px 0; }
      .form-wrap { padding: 24px; }
    }