/* roulang page: index */
:root {
      --c-primary: #00E575;
      --c-primary-hover: #00c763;
      --c-secondary: #00B4D8;
      --c-accent: #FF5E3A;
      --bg-dark: #0F141C;
      --bg-darker: #0A0D12;
      --bg-card: #161D26;
      --bg-light: #F4F7F6;
      --bg-white: #FFFFFF;
      --t-light: #FFFFFF;
      --t-muted: #94A3B8;
      --t-dark: #1E293B;
      --t-dark-muted: #64748B;
      --border-dark: rgba(255, 255, 255, 0.08);
      --border-light: rgba(0, 0, 0, 0.08);
      --radius: 8px;
      --radius-pill: 9999px;
      --shadow-green: 0 10px 30px -10px rgba(0, 229, 117, 0.25);
      --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.05);
      --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-main);
      background-color: var(--bg-dark);
      color: var(--t-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    /* Top Strip */
    .top-meta-bar {
      background: var(--bg-darker);
      border-bottom: 1px solid var(--border-dark);
      font-size: 0.8rem;
      padding: 0.5rem 0;
      color: var(--t-muted);
    }
    .top-meta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--c-primary);
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--c-primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--c-primary);
    }

    /* Main Navigation */
    .main-nav-wrap {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(15, 20, 28, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-dark);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.85rem 0;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: center;
      letter-spacing: -0.5px;
    }
    .brand-logo span {
      color: var(--c-primary);
      margin-right: 4px;
    }
    .nav-menu {
      display: flex;
      gap: 1.8rem;
      align-items: center;
    }
    .nav-menu a {
      font-size: 0.95rem;
      color: var(--t-muted);
      font-weight: 500;
    }
    .nav-menu a:hover {
      color: var(--c-primary);
    }
    .btn-nav-cta {
      background: var(--c-primary);
      color: #05140d;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 0.6rem 1.4rem;
      border-radius: var(--radius-pill);
      box-shadow: var(--shadow-green);
    }
    .btn-nav-cta:hover {
      background: var(--c-primary-hover);
      transform: translateY(-2px);
      color: #000;
    }

    /* Common Components */
    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .sec-light {
      background: var(--bg-light);
      color: var(--t-dark);
    }
    .sec-light .section-desc {
      color: var(--t-dark-muted);
    }
    .section-head {
      margin-bottom: 3.5rem;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--c-primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 0.5rem;
      padding: 0.2rem 0.75rem;
      background: rgba(0, 229, 117, 0.1);
      border-radius: 4px;
    }
    .sec-light .section-tag {
      background: rgba(0, 180, 216, 0.12);
      color: #007791;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--t-muted);
      max-width: 780px;
      margin: 0 auto;
      line-height: 1.8;
    }

    /* Hero Section */
    .hero-section {
      background: linear-gradient(180deg, rgba(15, 20, 28, 0.85) 0%, rgba(15, 20, 28, 0.98) 100%),
                  url('/assets/images/20c8b4d27bad2fa9.jpg') center/cover no-repeat;
      padding: 5.5rem 0 4.5rem;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -1px;
    }
    .hero-h1 em {
      font-style: normal;
      color: var(--c-primary);
    }
    .hero-summary {
      font-size: 1.15rem;
      color: var(--t-muted);
      line-height: 1.85;
      margin-bottom: 2.5rem;
    }
    .coupon-wall {
      background: rgba(22, 29, 38, 0.8);
      border: 1px dashed var(--c-primary);
      border-radius: var(--radius);
      padding: 1.8rem;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 1.5rem;
      box-shadow: var(--shadow-green);
      margin-bottom: 2.5rem;
    }
    .coupon-detail h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.3rem;
    }
    .coupon-detail p {
      font-size: 0.9rem;
      color: var(--t-muted);
      margin: 0;
    }
    .coupon-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--c-primary);
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .coupon-val small { font-size: 1rem; color: #fff; }
    .btn-claim {
      background: var(--c-primary);
      color: #06180e;
      font-weight: 800;
      font-size: 1.05rem;
      padding: 0.85rem 2.2rem;
      border-radius: var(--radius-pill);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 229, 117, 0.4);
    }
    .btn-claim:hover {
      background: #fff;
      color: #000;
    }

    /* KPI Bar */
    .kpi-section {
      background: #0B0E14;
      border-bottom: 1px solid var(--border-dark);
      padding: 3rem 0;
    }
    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      text-align: center;
    }
    .kpi-card {
      padding: 1.5rem 1rem;
      border-right: 1px solid var(--border-dark);
    }
    .kpi-card:last-child { border-right: none; }
    .kpi-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--c-primary);
      line-height: 1.1;
      margin-bottom: 0.4rem;
    }
    .kpi-label {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.3rem;
    }
    .kpi-sub {
      font-size: 0.85rem;
      color: var(--t-muted);
    }

    /* Card System */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .pain-card {
      background: rgba(22, 29, 38, 0.6);
      border: 1px solid var(--border-dark);
      border-top: 3px solid var(--c-accent);
      padding: 2.2rem;
      border-radius: var(--radius);
      transition: transform 0.25s ease;
    }
    .pain-card:hover { transform: translateY(-5px); }
    .pain-tag {
      color: var(--c-accent);
      font-weight: 700;
      font-size: 0.85rem;
      margin-bottom: 0.6rem;
    }
    .pain-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.8rem;
    }
    .pain-desc {
      font-size: 0.95rem;
      color: var(--t-muted);
      line-height: 1.7;
    }

    /* Light Theme Service Matrix */
    .matrix-card {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }
    .matrix-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(0,0,0,0.08);
    }
    .matrix-card-img {
      height: 190px;
      overflow: hidden;
    }
    .matrix-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .matrix-card:hover .matrix-card-img img {
      transform: scale(1.05);
    }
    .matrix-content {
      padding: 1.8rem;
    }
    .matrix-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--t-dark);
      margin-bottom: 0.6rem;
    }
    .matrix-text {
      font-size: 0.95rem;
      color: var(--t-dark-muted);
      line-height: 1.7;
      margin-bottom: 1.2rem;
    }
    .matrix-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 0.8rem;
      border-top: 1px solid var(--border-light);
      font-size: 0.85rem;
      color: #007791;
      font-weight: 600;
    }

    /* Workflow Pipeline */
    .step-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .step-node {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 2rem 1.5rem;
      position: relative;
    }
    .step-index {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--c-primary);
      margin-bottom: 0.6rem;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.5rem;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--t-muted);
      line-height: 1.65;
    }

    /* Compare Matrix */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      border-radius: var(--radius);
      overflow: hidden;
      background: #fff;
      box-shadow: var(--shadow-soft);
    }
    .compare-table th {
      padding: 1.2rem 1.5rem;
      font-size: 1rem;
      text-align: left;
    }
    .compare-table th.col-bad {
      background: #F1F5F9;
      color: #475569;
      width: 38%;
    }
    .compare-table th.col-good {
      background: #0B3B2B;
      color: var(--c-primary);
      width: 44%;
    }
    .compare-table td {
      padding: 1.2rem 1.5rem;
      border-bottom: 1px solid #EDF2F7;
      font-size: 0.95rem;
      color: var(--t-dark-muted);
    }
    .compare-table tr:last-child td { border-bottom: none; }
    .compare-table td.dim-bad {
      background: #F8FAFC;
    }
    .compare-table td.dim-good {
      background: #F0FDF4;
      font-weight: 600;
      color: #065F46;
    }

    /* Hardware Spotlight */
    .hardware-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 1.8rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .hardware-tag {
      display: inline-block;
      font-size: 0.75rem;
      background: rgba(0, 180, 216, 0.15);
      color: var(--c-secondary);
      padding: 0.2rem 0.6rem;
      border-radius: 4px;
      margin-bottom: 1rem;
    }
    .hardware-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.6rem;
    }
    .hardware-desc {
      font-size: 0.9rem;
      color: var(--t-muted);
      line-height: 1.7;
      margin-bottom: 1.2rem;
    }
    .hardware-specs {
      background: rgba(0, 0, 0, 0.25);
      padding: 0.8rem;
      border-radius: 4px;
      font-size: 0.8rem;
      color: #CBD5E1;
      margin-bottom: 1.2rem;
    }
    .hardware-specs li { margin-bottom: 0.3rem; }
    .hardware-specs li:last-child { margin-bottom: 0; }

    /* Timeline / Milestones */
    .timeline-list {
      border-left: 2px solid rgba(0, 229, 117, 0.3);
      padding-left: 2rem;
      margin-left: 1rem;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 2.2rem;
    }
    .timeline-item:last-child { margin-bottom: 0; }
    .timeline-dot {
      width: 14px;
      height: 14px;
      background: var(--c-primary);
      border-radius: 50%;
      position: absolute;
      left: -2.45rem;
      top: 0.35rem;
      box-shadow: 0 0 10px var(--c-primary);
    }
    .timeline-year {
      font-size: 1rem;
      font-weight: 800;
      color: var(--c-primary);
      margin-bottom: 0.3rem;
    }
    .timeline-head {
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.4rem;
    }
    .timeline-detail {
      font-size: 0.95rem;
      color: var(--t-muted);
      line-height: 1.7;
    }

    /* Testimonials */
    .quote-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 2.2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .quote-text {
      font-size: 0.95rem;
      color: #E2E8F0;
      line-height: 1.75;
      margin-bottom: 1.5rem;
      font-style: italic;
    }
    .quote-user {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .quote-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #2D3748;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--c-primary);
      border: 1px solid var(--c-primary);
    }
    .quote-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.1rem;
    }
    .quote-meta p {
      font-size: 0.8rem;
      color: var(--t-muted);
      margin: 0;
    }

    /* News Articles */
    .news-card {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 1.5rem;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-badge {
      font-size: 0.75rem;
      color: #0369A1;
      background: #E0F2FE;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 0.8rem;
    }
    .news-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--t-dark);
      margin-bottom: 0.6rem;
      line-height: 1.45;
    }
    .news-brief {
      font-size: 0.88rem;
      color: var(--t-dark-muted);
      line-height: 1.65;
      margin-bottom: 1rem;
    }
    .news-date {
      font-size: 0.8rem;
      color: #94A3B8;
      border-top: 1px solid #F1F5F9;
      padding-top: 0.6rem;
    }

    /* Assurance & Protocol Badges */
    .security-card {
      background: rgba(22, 29, 38, 0.4);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 1.8rem;
      text-align: center;
    }
    .security-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.5rem;
    }
    .security-card p {
      font-size: 0.9rem;
      color: var(--t-muted);
      line-height: 1.65;
    }

    /* Accordion FAQ */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .faq-question {
      padding: 1.3rem 1.6rem;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question:hover { color: var(--c-primary); }
    .faq-symbol { font-size: 1.4rem; color: var(--c-primary); }
    .faq-answer {
      padding: 0 1.6rem 1.4rem;
      font-size: 0.95rem;
      color: var(--t-muted);
      line-height: 1.75;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 1rem;
    }

    /* Global Bottom Form CTA */
    .cta-banner {
      background: linear-gradient(135deg, #102A20 0%, #0F141C 100%);
      border: 1px solid rgba(0, 229, 117, 0.3);
      border-radius: var(--radius);
      padding: 3.5rem 2.5rem;
      text-align: center;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }
    .cta-banner h3 {
      font-size: 2.2rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 0.8rem;
    }
    .cta-banner p {
      font-size: 1.05rem;
      color: var(--t-muted);
      max-width: 650px;
      margin: 0 auto 2.2rem;
    }
    .cta-form {
      max-width: 580px;
      margin: 0 auto;
      display: flex;
      gap: 0.8rem;
    }
    .cta-input {
      flex: 1;
      padding: 0.85rem 1.2rem;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-dark);
      background: rgba(0, 0, 0, 0.4);
      color: #fff;
      font-size: 0.95rem;
      outline: none;
    }
    .cta-input:focus { border-color: var(--c-primary); }
    .cta-btn-submit {
      padding: 0.85rem 2.2rem;
      background: var(--c-primary);
      color: #06180e;
      font-weight: 800;
      border-radius: var(--radius-pill);
      border: none;
      cursor: pointer;
      white-space: nowrap;
    }
    .cta-btn-submit:hover { background: #fff; color: #000; }

    /* Sticky Bottom Conversion Bar */
    .fixed-conversion-strip {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 13, 18, 0.96);
      backdrop-filter: blur(12px);
      border-top: 1px solid rgba(0, 229, 117, 0.3);
      padding: 0.75rem 0;
      z-index: 998;
    }
    .fixed-strip-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .fixed-strip-txt {
      font-size: 0.95rem;
      color: #fff;
    }
    .fixed-strip-txt strong { color: var(--c-primary); }
    .fixed-strip-btn {
      background: var(--c-primary);
      color: #06180e;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 0.5rem 1.4rem;
      border-radius: var(--radius-pill);
    }

    /* Footer */
    .site-footer {
      background: var(--bg-darker);
      border-top: 1px solid var(--border-dark);
      padding: 4.5rem 0 5.5rem;
      color: var(--t-muted);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 2.5rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 0.8rem;
    }
    .footer-brand p {
      line-height: 1.7;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 1.2rem;
    }
    .footer-links li { margin-bottom: 0.6rem; }
    .footer-links a:hover { color: var(--c-primary); }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 2rem;
      text-align: center;
      font-size: 0.82rem;
      color: #64748B;
    }

    /* Responsive Queries */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .step-track { grid-template-columns: repeat(2, 1fr); }
      .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
      .kpi-card { border-right: none; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 2.1rem; }
      .grid-3 { grid-template-columns: 1fr; }
      .grid-2 { grid-template-columns: 1fr; }
      .grid-4 { grid-template-columns: 1fr; }
      .step-track { grid-template-columns: 1fr; }
      .kpi-grid { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
      .cta-form { flex-direction: column; }
      .fixed-strip-txt { font-size: 0.8rem; }
      .footer-grid { grid-template-columns: 1fr; }
    }