/* roulang page: index */
:root {
    --bg-primary: #080D1A;
    --bg-secondary: #0D1526;
    --bg-elevated: #111D35;
    --brand-info: #3B82F6;
    --brand-accent: #00E5A0;
    --text-primary: #E6EDF7;
    --text-secondary: #93A6C1;
    --text-muted: #5B6C84;
    --border-glass: rgba(255,255,255,0.08);
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font-family: inherit; }

  /* ========== Container ========== */
  .site-container {
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  @media (min-width: 640px) {
    .site-container { padding-left: 1.5rem; padding-right: 1.5rem; }
  }
  @media (min-width: 1024px) {
    .site-container { padding-left: 2rem; padding-right: 2rem; }
  }

  /* ========== Section spacing ========== */
  .section {
    padding: 64px 0;
    position: relative;
  }
  @media (min-width: 1024px) {
    .section { padding: 100px 0; }
  }

  .section-head {
    max-width: 720px;
    margin-bottom: 48px;
  }
  .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
  .section-head h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.25;
  }
  .section-head p {
    margin-top: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* ========== Header ========== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(8, 13, 26, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-glass);
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
  }
  @media (min-width: 1024px) {
    .header-inner { height: 76px; }
  }
  .logo {
    display: flex;
    align-items: baseline;
    gap: 6px;
    flex-shrink: 0;
  }
  .logo-main {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
  }
  .logo-sub {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    text-transform: uppercase;
  }
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 80px;
  }
  .nav-link {
    position: relative;
    display: inline-block;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.3s ease;
  }
  .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #00E5A0, #3B82F6);
    transform: translateX(-50%);
    transition: width 0.3s ease;
  }
  .nav-link:hover {
    color: var(--text-primary);
  }
  .nav-link:hover::after {
    width: 60%;
  }
  .nav-link.active {
    color: var(--text-primary);
  }
  .nav-link.active::after {
    width: 60%;
  }

  /* Mobile header */
  .mobile-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    transition: border-color 0.3s;
  }
  .mobile-toggle:hover { border-color: rgba(255,255,255,0.28); }
  .mobile-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
  }
  @media (max-width: 767px) {
    .desktop-nav { display: none; }
    .mobile-toggle { display: flex; }
  }

  .mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(10, 17, 40, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
  }
  .mobile-menu.open { opacity: 1; visibility: visible; }
  .mobile-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 30px;
    line-height: 1;
    color: var(--text-primary);
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
    max-width: 320px;
    text-align: center;
  }
  .mobile-link {
    display: block;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: color 0.3s;
  }
  .mobile-link:hover,
  .mobile-link.active { color: var(--text-primary); }

  /* ========== Buttons ========== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 46px;
    padding: 0 26px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    outline: none;
  }
  .btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(0,229,160,0.35);
  }
  .btn-primary {
    background: var(--brand-accent);
    color: #0A1128;
    box-shadow: 0 0 22px rgba(0,229,160,0.28);
  }
  .btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 34px rgba(0,229,160,0.45);
    transform: translateY(-1px);
  }
  .btn-primary:active { transform: scale(0.98); }
  .btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.18);
    backdrop-filter: blur(10px);
  }
  .btn-ghost:hover {
    border-color: rgba(255,255,255,0.32);
    background: rgba(255,255,255,0.05);
    transform: translateY(-1px);
  }
  .btn-ghost:active { transform: scale(0.98); }
  .btn-block { width: 100%; }

  /* ========== Hero ========== */
  .hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-primary);
  }
  .hero-bg {
    position: absolute;
    inset: 0;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
  }
  .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8,13,26,0.92) 0%, rgba(10,17,40,0.82) 55%, rgba(10,17,40,0.9) 100%);
  }
  .hero-grid-texture {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
  }
  .hero-content {
    position: relative;
    z-index: 10;
    width: 100%;
    padding-bottom: 110px;
  }
  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
    margin-bottom: 22px;
  }
  .hero-eyebrow::before {
    content: "";
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #00E5A0, #3B82F6);
  }
  .hero-title {
    font-size: clamp(2rem, 4.5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    max-width: 780px;
  }
  .gradient-text {
    background: linear-gradient(120deg, #00E5A0 0%, #3B82F6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .hero-subtitle {
    margin-top: 20px;
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 520px;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-top: 36px;
  }
  .hero-trust {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.02em;
  }
  .hero-trust .dot { color: rgba(255,255,255,0.2); }

  /* ========== Metrics ========== */
  .metrics-section {
    position: relative;
    z-index: 20;
    margin-top: -82px;
  }
  .metrics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  @media (min-width: 1024px) {
    .metrics-grid { grid-template-columns: repeat(4, 1fr); }
  }
  .metric-card {
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 24px 22px;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }
  .metric-card:hover {
    transform: translateY(-3px);
    border-color: rgba(255,255,255,0.16);
    box-shadow: 0 8px 30px rgba(0,0,0,0.35);
  }
  .metric-value {
    font-size: clamp(2.2rem, 3.2vw, 3.2rem);
    font-weight: 800;
    color: var(--brand-accent);
    font-variant-numeric: tabular-nums;
    line-height: 1;
    letter-spacing: -0.02em;
  }
  .metric-value span {
    font-size: 0.45em;
    font-weight: 700;
    color: var(--text-secondary);
    margin-left: 2px;
  }
  .metric-label {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
  }

  /* ========== Services ========== */
  .services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }
  @media (min-width: 1024px) {
    .services-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  }
  .service-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 22px;
    padding: 28px;
    transition: all 0.35s ease;
  }
  .service-card:hover {
    background: rgba(255,255,255,0.07);
    border-color: rgba(255,255,255,0.18);
    transform: translateY(-3px);
    box-shadow: 0 0 26px rgba(0,229,160,0.07);
  }
  .service-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--brand-accent);
  }
  .service-card:nth-child(2n) .service-icon { color: var(--brand-info); }
  .service-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
  }
  .service-body p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 12px;
  }
  .service-link {
    font-size: 13px;
    font-weight: 500;
    color: #22d3ee;
    transition: color 0.3s;
  }
  .service-link:hover { color: #67e8f9; }

  /* ========== Updates ========== */
  .updates-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
  }
  @media (min-width: 1024px) {
    .updates-grid { grid-template-columns: 3fr 5fr; gap: 36px; }
  }
  .featured-post {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 22px;
    overflow: hidden;
    transition: all 0.35s ease;
  }
  .featured-post:hover {
    border-color: rgba(255,255,255,0.16);
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(0,0,0,0.35);
  }
  .featured-link { display: block; height: 100%; }
  .featured-img {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #0D1526;
  }
  .featured-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .featured-img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(8,13,26,0.7));
  }
  .featured-content { padding: 24px; }
  .post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
  }
  .post-meta time {
    font-size: 12px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
  }
  .tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.05);
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
  }
  .featured-content h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.45;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .featured-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
  }
  .read-more {
    font-size: 13px;
    font-weight: 500;
    color: #22d3ee;
  }
  .post-list {
    display: flex;
    flex-direction: column;
  }
  .post-item {
    padding: 20px 4px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: background 0.25s ease;
  }
  .post-item:last-child { border-bottom: none; }
  .post-item:hover { background: rgba(255,255,255,0.02); }
  .post-item-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
  }
  .post-item-meta time {
    font-size: 12px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
  }
  .post-item h4 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .post-item h4 a:hover { color: #22d3ee; }
  .post-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
  }
  .read-link {
    font-size: 13px;
    color: #22d3ee;
    font-weight: 500;
  }
  .read-link:hover { color: #67e8f9; }
  .empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px;
    text-align: center;
    background: rgba(255,255,255,0.02);
    border: 1px dashed rgba(255,255,255,0.1);
    border-radius: 22px;
  }
  .empty-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    position: relative;
  }
  .empty-icon::before {
    content: "";
    width: 28px;
    height: 3px;
    border-radius: 2px;
    background: var(--text-muted);
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
  }
  .empty-icon::after {
    content: "";
    width: 18px;
    height: 18px;
    border-radius: 6px;
    border: 2px solid var(--text-muted);
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
  }
  .empty-state p {
    font-size: 14px;
    color: var(--text-muted);
  }

  /* ========== Compare ========== */
  .compare-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }
  @media (min-width: 1024px) {
    .compare-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  }
  .compare-card {
    border-radius: 22px;
    padding: 32px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
  }
  .compare-card.compare-new {
    background: rgba(255,255,255,0.05);
    border-color: rgba(0,229,160,0.25);
    box-shadow: 0 0 30px rgba(0,229,160,0.05);
  }
  .compare-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .compare-card h3::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
  }
  .compare-card.compare-new h3::before {
    background: var(--brand-accent);
    box-shadow: 0 0 8px rgba(0,229,160,0.5);
  }
  .compare-card ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
  .compare-card li {
    position: relative;
    padding-left: 30px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
  }
  .compare-card li::before {
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 15px;
    font-weight: bold;
  }
  .compare-card.compare-old li::before {
    content: "×";
    color: #F87171;
  }
  .compare-card.compare-new li::before {
    content: "✓";
    color: var(--brand-accent);
  }
  .compare-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    margin-top: 40px;
    padding: 24px 0;
    border-top: 1px solid rgba(255,255,255,0.07);
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }
  .compare-stats div {
    flex: 1;
    min-width: 130px;
    text-align: center;
    padding: 8px 16px;
    border-right: 1px solid rgba(255,255,255,0.06);
  }
  .compare-stats div:last-child { border-right: none; }
  .compare-stats strong {
    display: block;
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 700;
    color: var(--brand-accent);
    font-variant-numeric: tabular-nums;
  }
  .compare-stats span {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
  }

  /* ========== FAQ ========== */
  .faq-list {
    max-width: 800px;
    margin: 0 auto;
    border-top: 1px solid rgba(255,255,255,0.07);
  }
  .faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 4px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    transition: color 0.3s;
    user-select: none;
  }
  .faq-item summary:hover { color: #fff; }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item .plus {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 300;
    color: var(--brand-accent);
    transition: transform 0.35s ease;
  }
  .faq-item[open] .plus { transform: rotate(45deg); }
  .faq-item .answer {
    padding: 0 4px 22px;
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-secondary);
  }

  /* ========== Contact ========== */
  .contact-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 28px;
    padding: 36px 28px;
  }
  @media (min-width: 1024px) {
    .contact-panel {
      grid-template-columns: 2fr 3fr;
      gap: 56px;
      padding: 56px 52px;
    }
  }
  .contact-left h2 {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 14px;
  }
  .contact-left > p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 28px;
  }
  .contact-points {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .contact-points li {
    position: relative;
    padding-left: 28px;
    font-size: 14px;
    color: var(--text-secondary);
  }
  .contact-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: rgba(0,229,160,0.15);
    border: 1px solid rgba(0,229,160,0.4);
  }
  .contact-points li::after {
    content: "✓";
    position: absolute;
    left: 3px;
    top: 3px;
    font-size: 10px;
    color: var(--brand-accent);
    font-weight: bold;
  }
  .contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .form-group { display: flex; flex-direction: column; gap: 8px; }
  .form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
  }
  .form-group label .required { color: #F87171; }
  .form-group input,
  .form-group select {
    height: 46px;
    width: 100%;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 0 16px;
    font-size: 14px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
  }
  .form-group input::placeholder { color: var(--text-muted); }
  .form-group input:focus,
  .form-group select:focus {
    border-color: rgba(0,229,160,0.5);
    box-shadow: 0 0 0 3px rgba(0,229,160,0.12);
  }
  .form-group select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2393A6C1' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 12px;
    cursor: pointer;
  }
  .form-group select option {
    background: #111D35;
    color: var(--text-primary);
  }

  /* ========== Footer ========== */
  .site-footer {
    border-top: 1px solid rgba(255,255,255,0.08);
    background: rgba(13,21,38,0.6);
    padding: 60px 0 0;
  }
  .footer-top {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 44px;
  }
  @media (min-width: 768px) {
    .footer-top { grid-template-columns: 2fr 1fr 1fr; }
  }
  .footer-brand .footer-logo {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 14px;
  }
  .footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 280px;
  }
  .footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
  }
  .footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 0;
    transition: color 0.3s;
  }
  .footer-col a:hover { color: var(--brand-accent); }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 22px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }
  .footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
  }
  .footer-links {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
  }
  .footer-links a { color: var(--text-secondary); }
  .footer-links a:hover { color: var(--brand-accent); }
  .footer-links span { opacity: 0.3; }

  /* ========== Reveal animation ========== */
  .reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ========== Accessibility ========== */
  a:focus-visible {
    outline: 2px solid rgba(0,229,160,0.6);
    outline-offset: 2px;
    border-radius: 4px;
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; scroll-behavior: auto !important; }
    .reveal { opacity: 1; transform: none; }
  }

/* roulang page: category1 */
:root {
            --bg-primary: #080D1A;
            --bg-secondary: #0D1526;
            --bg-elevated: #111D35;
            --brand-primary: #3B82F6;
            --brand-accent: #00E5A0;
            --text-primary: #E6EDF7;
            --text-secondary: #93A6C1;
            --text-muted: #5B6C84;
            --border-glass: rgba(255, 255, 255, 0.08);
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
            --shadow-accent: 0 0 24px rgba(0, 229, 160, 0.3);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        .site-container {
            max-width: 1280px;
            margin-inline: auto;
            padding-inline: 1rem;
        }

        @media (min-width: 640px) {
            .site-container {
                padding-inline: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .site-container {
                padding-inline: 2rem;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(8, 13, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-glass);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            flex-shrink: 0;
        }

        .logo-main {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .logo-sub {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 0;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-link:hover {
            color: var(--text-primary);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            height: 2px;
            width: 0;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
            transition: width 0.3s ease;
        }

        .nav-link:hover::after {
            width: 60%;
        }

        .nav-link.active {
            color: var(--text-primary);
        }

        .nav-link.active::after {
            width: 100%;
            background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 0;
            width: 34px;
            height: 34px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            padding: 4px;
        }

        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .mobile-toggle.open span:first-child {
            transform: translateY(4px) rotate(45deg);
        }

        .mobile-toggle.open span:last-child {
            transform: translateY(-4px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .category-hero {
            min-height: 38vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(180deg, rgba(5, 10, 24, 0.82) 0%, rgba(8, 13, 26, 0.92) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 72px 0;
        }

        .page-title {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .hero-sub {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 16px;
        }

        .hero-trust {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .hero-trust .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--brand-accent);
            display: inline-block;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: 0;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand-accent);
            color: #0A1128;
            box-shadow: var(--shadow-accent);
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 36px rgba(0, 229, 160, 0.5);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand-accent);
            outline-offset: 2px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 72px 0;
        }

        .section-header {
            max-width: 720px;
            margin-bottom: 44px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand-accent);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 26px;
            transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
        }

        .glass-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }

        .icon-box {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            color: var(--brand-accent);
            margin-bottom: 18px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 12px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.06);
            font-size: 11px;
            font-weight: 500;
            color: #CBD5E1;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        /* ===== Content blocks ===== */
        .content-block {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            align-items: center;
        }

        .content-block+.content-block {
            margin-top: 56px;
        }

        .content-visual {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border-glass);
            position: relative;
            background: var(--bg-elevated);
        }

        .content-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 240px;
        }

        .content-text h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .content-text p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 14px;
        }

        @media (min-width: 1024px) {
            .content-block {
                grid-template-columns: 1fr 1fr;
                gap: 48px;
            }

            .content-block.reverse .content-visual {
                order: 2;
            }

            .content-block.reverse .content-text {
                order: 1;
            }
        }

        /* ===== Feature cards ===== */
        .feature-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: 16px;
            padding: 24px;
            transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
        }

        .feature-card:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        .feature-card .icon-box {
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

        /* ===== Steps ===== */
        .step-item {
            position: relative;
            padding: 24px 20px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glass);
            border-radius: 16px;
            text-align: center;
            transition: border-color 0.3s ease, background 0.3s ease;
        }

        .step-item:hover {
            border-color: rgba(0, 229, 160, 0.3);
            background: rgba(255, 255, 255, 0.04);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(0, 229, 160, 0.12);
            color: var(--brand-accent);
            font-weight: 700;
            font-size: 14px;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-item p {
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 18px 0;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            transition: color 0.3s ease;
        }

        .faq-item summary:hover {
            color: var(--brand-accent);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--brand-accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            line-height: 1;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item .answer {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.9;
            padding: 0 0 18px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 48px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: 60px;
            height: 2px;
            width: 80px;
            border-radius: 2px;
            background: var(--brand-accent);
            left: 50%;
            transform: translateX(-50%);
            opacity: 0.6;
        }

        .cta-box h2 {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 480px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0A101F;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 52px 0 26px;
            margin-top: 40px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
        }

        .footer-logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            margin-bottom: 14px;
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .footer-col a:hover {
            color: var(--brand-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted);
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--text-primary);
        }

        .footer-links span {
            color: rgba(255, 255, 255, 0.15);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav {
                position: fixed;
                inset: 0;
                background: rgba(10, 17, 40, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 8px;
                z-index: 55;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s ease, visibility 0.3s ease;
            }

            .desktop-nav.open {
                opacity: 1;
                visibility: visible;
            }

            .desktop-nav .nav-link {
                font-size: 18px;
                padding: 14px 0;
                color: var(--text-primary);
            }

            .mobile-toggle {
                display: flex;
                z-index: 70;
                position: relative;
            }

            .section {
                padding: 52px 0;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: span 1;
            }

            .cta-box {
                padding: 36px 20px;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .content-block+.content-block {
                margin-top: 40px;
            }
        }

        @media (max-width: 520px) {
            .site-header .header-inner {
                height: 64px;
            }

            .logo-main {
                font-size: 18px;
            }

            .logo-sub {
                font-size: 11px;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .hero-trust {
                font-size: 12px;
            }
        }

/* roulang page: article */
:root {
        --bg-primary: #080D1A;
        --bg-secondary: #0D1526;
        --bg-elevated: #111D35;
        --brand-primary: #3B82F6;
        --brand-accent: #00E5A0;
        --text-primary: #E6EDF7;
        --text-secondary: #93A6C1;
        --text-muted: #5B6C84;
        --border-glass: rgba(255, 255, 255, 0.08);
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 12px;
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--bg-primary);
        color: var(--text-primary);
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        -webkit-font-smoothing: antialiased;
        line-height: 1.6;
    }

    img {
        max-width: 100%;
        display: block;
    }

    a {
        color: inherit;
    }

    button,
    input,
    select {
        font-family: inherit;
    }

    .site-container {
        max-width: 1280px;
        margin: 0 auto;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    @media (min-width: 640px) {
        .site-container {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
    }

    @media (min-width: 1024px) {
        .site-container {
            padding-left: 2rem;
            padding-right: 2rem;
        }
    }

    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(8, 13, 26, 0.85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-glass);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 40px;
    }

    .logo {
        display: inline-flex;
        align-items: baseline;
        gap: 6px;
        text-decoration: none;
        flex-shrink: 0;
    }

    .logo-main {
        font-size: 20px;
        font-weight: 800;
        color: #ffffff;
        letter-spacing: -0.01em;
    }

    .logo-sub {
        font-size: 12px;
        color: var(--text-muted);
    }

    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 36px;
        margin-left: auto;
    }

    .nav-link {
        font-size: 14px;
        color: var(--text-secondary);
        text-decoration: none;
        position: relative;
        padding: 8px 0;
        transition: color 0.3s;
    }

    .nav-link:hover {
        color: #ffffff;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 0;
        height: 2px;
        border-radius: 2px;
        background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
        transition: width 0.3s;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
        width: 60%;
    }

    .nav-link.active {
        color: #ffffff;
    }

    .mobile-toggle {
        display: none;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 6px;
        background: transparent;
        border: none;
        cursor: pointer;
        border-radius: 8px;
    }

    .mobile-toggle span {
        display: block;
        width: 20px;
        height: 2px;
        background: #ffffff;
        border-radius: 2px;
        transition: transform 0.3s;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: translateY(4px) rotate(45deg);
    }

    .mobile-toggle.active span:nth-child(2) {
        transform: translateY(-4px) rotate(-45deg);
    }

    /* Article Hero */
    .article-hero {
        position: relative;
        padding: 72px 0 60px;
        background:
            linear-gradient(180deg, rgba(8, 13, 26, 0.84) 0%, rgba(8, 13, 26, 0.94) 100%),
            url('/assets/images/backpic/back-3.png') center / cover no-repeat;
        border-bottom: 1px solid var(--border-glass);
    }

    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image:
            linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
        background-size: 44px 44px;
        pointer-events: none;
    }

    .article-hero .site-container {
        position: relative;
        z-index: 1;
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 24px;
    }

    .breadcrumb a {
        color: var(--text-secondary);
        text-decoration: none;
        transition: color 0.3s;
    }

    .breadcrumb a:hover {
        color: var(--brand-accent);
    }

    .breadcrumb-current {
        color: var(--text-secondary);
        max-width: 420px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .article-hero h1 {
        font-size: clamp(1.8rem, 3vw, 2.8rem);
        line-height: 1.3;
        font-weight: 800;
        color: #ffffff;
        letter-spacing: -0.02em;
        max-width: 860px;
        margin: 0 0 20px;
    }

    .article-meta {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 14px;
        font-size: 14px;
        color: var(--text-secondary);
    }

    .meta-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .meta-badge {
        display: inline-flex;
        align-items: center;
        padding: 4px 12px;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border-glass);
        border-radius: 999px;
        font-size: 12px;
        color: var(--text-primary);
    }

    /* Article Body */
    .article-section {
        padding: 48px 0;
    }

    .article-layout {
        max-width: 840px;
        margin: 0 auto;
    }

    .article-content {
        font-size: 16px;
        line-height: 1.9;
        color: #C0CDDE;
    }

    .article-content p {
        margin: 0 0 1.4em;
    }

    .article-content h2 {
        font-size: 22px;
        font-weight: 700;
        color: #ffffff;
        margin: 40px 0 16px;
        line-height: 1.4;
    }

    .article-content h3 {
        font-size: 18px;
        font-weight: 600;
        color: #ffffff;
        margin: 32px 0 12px;
        line-height: 1.5;
    }

    .article-content blockquote {
        border-left: 2px solid var(--brand-accent);
        padding-left: 16px;
        font-style: italic;
        color: var(--text-secondary);
        margin: 24px 0;
        background: rgba(0, 229, 160, 0.03);
        border-radius: 0 12px 12px 0;
    }

    .article-content img {
        border-radius: 16px;
        border: 1px solid var(--border-glass);
        margin: 24px 0;
        max-width: 100%;
        height: auto;
    }

    .article-content ul,
    .article-content ol {
        margin: 16px 0 20px 20px;
        padding: 0;
    }

    .article-content li {
        margin-bottom: 6px;
    }

    .article-content a {
        color: var(--brand-accent);
        text-decoration: underline;
    }

    /* Not Found */
    .not-found {
        text-align: center;
        padding: 72px 20px;
    }

    .not-found-title {
        font-size: 28px;
        font-weight: 800;
        color: #ffffff;
        margin: 0 0 12px;
    }

    .not-found-desc {
        color: var(--text-muted);
        font-size: 15px;
        margin: 0 0 32px;
    }

    /* Buttons */
    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        height: 44px;
        padding: 0 24px;
        background: var(--brand-accent);
        color: #0A1128;
        font-weight: 600;
        font-size: 14px;
        border-radius: var(--radius-sm);
        box-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
        transition: all 0.3s;
        text-decoration: none;
        border: none;
        cursor: pointer;
    }

    .btn-primary:hover {
        box-shadow: 0 0 36px rgba(0, 229, 160, 0.5);
        filter: brightness(1.1);
    }

    .btn-primary:active {
        transform: scale(0.97);
    }

    .btn-primary:focus-visible {
        outline: 2px solid var(--brand-accent);
        outline-offset: 3px;
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        height: 44px;
        padding: 0 24px;
        background: transparent;
        color: #ffffff;
        font-weight: 500;
        font-size: 14px;
        border-radius: var(--radius-sm);
        border: 1px solid rgba(255, 255, 255, 0.15);
        transition: all 0.3s;
        text-decoration: none;
    }

    .btn-ghost:hover {
        border-color: rgba(255, 255, 255, 0.3);
        background: rgba(255, 255, 255, 0.04);
    }

    .btn-ghost:focus-visible {
        outline: 2px solid rgba(255, 255, 255, 0.4);
        outline-offset: 3px;
    }

    /* Tags */
    .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        max-width: 840px;
        margin: 0 auto;
    }

    .tag {
        display: inline-flex;
        align-items: center;
        padding: 6px 14px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 999px;
        font-size: 13px;
        color: var(--text-secondary);
        text-decoration: none;
        transition: all 0.3s;
        border: 1px solid transparent;
    }

    .tag:hover {
        border-color: rgba(0, 229, 160, 0.3);
        color: #ffffff;
    }

    /* Section Head */
    .section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 24px;
    }

    .section-title {
        font-size: 24px;
        font-weight: 700;
        color: #ffffff;
        margin: 0;
    }

    /* Related */
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .related-card {
        display: block;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        overflow: hidden;
        text-decoration: none;
        transition: all 0.3s;
    }

    .related-card:hover {
        transform: translateY(-2px);
        border-color: rgba(255, 255, 255, 0.18);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    }

    .related-thumb {
        position: relative;
        aspect-ratio: 16 / 9;
        overflow: hidden;
        background: var(--bg-secondary);
    }

    .related-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .related-info {
        padding: 16px;
    }

    .related-info h3 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
        line-height: 1.5;
        margin: 0 0 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .related-date {
        font-size: 12px;
        color: var(--text-muted);
    }

    /* CTA */
    .cta-box {
        max-width: 1000px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-lg);
        padding: 40px;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
    }

    .cta-content h2 {
        font-size: 22px;
        font-weight: 700;
        color: #ffffff;
        margin: 0 0 8px;
    }

    .cta-content p {
        color: var(--text-secondary);
        font-size: 15px;
        margin: 0;
    }

    /* Back Bar */
    .back-bar {
        padding: 24px 0 56px;
        text-align: center;
    }

    .back-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--text-secondary);
        font-size: 14px;
        text-decoration: none;
        transition: color 0.3s;
    }

    .back-link:hover {
        color: var(--brand-accent);
    }

    /* Footer */
    .site-footer {
        border-top: 1px solid var(--border-glass);
        background: var(--bg-secondary);
        padding-top: 56px;
    }

    .footer-top {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
    }

    .footer-logo {
        display: inline-flex;
        align-items: baseline;
        gap: 6px;
        text-decoration: none;
    }

    .footer-brand p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
        margin: 12px 0 0;
        max-width: 320px;
    }

    .footer-col h4 {
        font-size: 15px;
        font-weight: 600;
        color: #ffffff;
        margin: 0 0 16px;
    }

    .footer-col a {
        display: block;
        font-size: 14px;
        color: var(--text-secondary);
        text-decoration: none;
        padding: 5px 0;
        transition: color 0.3s;
    }

    .footer-col a:hover {
        color: var(--brand-accent);
    }

    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 0;
        border-top: 1px solid var(--border-glass);
        font-size: 13px;
        color: var(--text-muted);
        flex-wrap: wrap;
        gap: 8px;
    }

    .footer-links {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .footer-links a {
        color: var(--text-muted);
        text-decoration: none;
        transition: color 0.3s;
    }

    .footer-links a:hover {
        color: var(--brand-accent);
    }

    /* Image fallback */
    .img-fallback {
        position: relative;
        background: var(--bg-secondary);
        min-height: 140px;
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
    }

    .img-fallback::before {
        content: '';
        width: 36px;
        height: 36px;
        border: 1px solid rgba(255, 255, 255, 0.3);
        border-radius: 10px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    .img-fallback::after {
        content: '';
        width: 24px;
        height: 9px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.3);
        position: absolute;
        top: calc(50% + 16px);
        left: 50%;
        transform: translateX(-50%);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .desktop-nav {
            gap: 24px;
        }
    }

    @media (max-width: 768px) {
        .desktop-nav {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(10, 17, 40, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 24px;
            margin: 0;
            z-index: 100;
        }

        .desktop-nav.open {
            display: flex;
        }

        .mobile-toggle {
            display: inline-flex;
        }

        .nav-link {
            font-size: 17px;
            line-height: 56px;
        }

        .nav-link::after {
            display: none;
        }

        .article-hero {
            padding: 56px 0 44px;
        }

        .article-section {
            padding: 36px 0;
        }

        .related-grid {
            grid-template-columns: 1fr;
        }

        .footer-top {
            grid-template-columns: 1fr;
            gap: 32px;
        }

        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }

        .cta-box {
            padding: 28px 20px;
            flex-direction: column;
            align-items: flex-start;
        }
    }

    @media (max-width: 520px) {
        .logo-main {
            font-size: 17px;
        }

        .logo-sub {
            font-size: 11px;
        }

        .breadcrumb {
            font-size: 12px;
        }

        .article-hero h1 {
            font-size: 1.6rem;
        }

        .article-content {
            font-size: 15px;
        }
    }

/* roulang page: category3 */
:root {
  --bg-primary: #080D1A;
  --bg-secondary: #0D1526;
  --bg-elevated: #111D35;
  --brand-primary: #3B82F6;
  --brand-accent: #00E5A0;
  --text-primary: #E6EDF7;
  --text-secondary: #93A6C1;
  --text-muted: #5B6C84;
  --border-glass: rgba(255,255,255,0.08);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; cursor: pointer; }

.site-container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .site-container { padding: 0 16px; } }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(8,13,26,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: baseline; gap: 8px; flex-shrink: 0; }
.logo-main { font-size: 20px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; }
.logo-sub { font-size: 12px; color: var(--text-muted); letter-spacing: 0.04em; }

.desktop-nav { display: flex; align-items: center; gap: 40px; }
.nav-link {
  position: relative; font-size: 15px; color: var(--text-secondary);
  padding: 6px 0; transition: color 0.3s ease;
}
.nav-link::after {
  content: ''; position: absolute; left: 50%; bottom: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
  border-radius: 2px; transform: translateX(-50%);
  transition: width 0.3s ease;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { width: 60%; }
.nav-link.active { color: #fff; }
.nav-link.active::after { width: 100%; left: 0; transform: none; }

.mobile-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 6px;
  width: 44px; height: 44px; background: transparent;
  border: 1px solid var(--border-glass); border-radius: 12px;
  padding: 0; align-items: center; transition: border-color 0.3s ease;
}
.mobile-toggle span { display: block; width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }
.mobile-toggle.active span:first-child { transform: translateY(4px) rotate(45deg); }
.mobile-toggle.active span:last-child { transform: translateY(-4px) rotate(-45deg); }
.mobile-menu {
  display: none; position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
  background: rgba(10,17,40,0.96); backdrop-filter: blur(20px); z-index: 99;
  padding-top: 24px;
}
.mobile-menu.open { display: block; }
.mobile-link {
  display: block; font-size: 18px; line-height: 56px;
  color: var(--text-primary); border-bottom: 1px solid var(--border-glass);
  padding: 0 24px; transition: color 0.3s ease;
}
.mobile-link:hover, .mobile-link.active { color: var(--brand-accent); }
@media (max-width: 768px) { .desktop-nav { display: none; } .mobile-toggle { display: flex; } }

.page-hero {
  position: relative; min-height: 35vh; display: flex; align-items: center;
  background-size: cover; background-position: center; padding-top: 72px;
}
.page-hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(8,13,26,0.92) 0%, rgba(10,17,40,0.82) 50%, rgba(8,13,26,0.92) 100%);
}
.page-hero-content { position: relative; z-index: 1; text-align: center; padding: 80px 24px; width: 100%; }
.page-hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 14px; color: #fff;
}
.page-hero-content p { font-size: 18px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }
.hero-trust { margin-top: 22px; font-size: 13px; color: var(--text-muted); display: flex; justify-content: center; gap: 12px; align-items: center; }
.hero-trust .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-muted); display: inline-block; }

.section-title { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 700; margin-bottom: 12px; letter-spacing: -0.01em; }
.section-subtitle { font-size: 15px; color: var(--text-secondary); max-width: 640px; margin: 0 auto; }
.section-tag {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--brand-accent);
  background: rgba(0,229,160,0.1); border: 1px solid rgba(0,229,160,0.2);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 16px; letter-spacing: 0.06em;
}

.content-img-wrap {
  border-radius: 20px; overflow: hidden; border: 1px solid var(--border-glass);
  background: var(--bg-secondary); box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.content-img-wrap img { width: 100%; height: 100%; min-height: 260px; object-fit: cover; transition: transform 0.5s ease; }
.content-img-wrap:hover img { transform: scale(1.03); }

.scene-card {
  text-align: center; padding: 36px 24px; background: var(--bg-secondary);
  border: 1px solid var(--border-glass); border-radius: 20px;
  transition: all 0.3s ease;
}
.scene-card:hover { border-color: rgba(0,229,160,0.25); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.3); }
.scene-num { font-size: 14px; font-weight: 700; color: var(--brand-accent); letter-spacing: 0.08em; margin-bottom: 12px; }
.scene-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; color: #fff; }
.scene-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.feature-card {
  background: rgba(255,255,255,0.03); border: 1px solid var(--border-glass);
  border-radius: 16px; padding: 32px 24px; transition: all 0.3s ease;
}
.feature-card:hover {
  background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.16);
  transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}
.feature-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.feature-icon.green { background: rgba(0,229,160,0.1); border: 1px solid rgba(0,229,160,0.2); color: var(--brand-accent); }
.feature-icon.blue { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2); color: var(--brand-primary); }
.feature-card h3 { font-size: 18px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

.faq-item { border-bottom: 1px solid var(--border-glass); }
.faq-item details { list-style: none; }
.faq-item summary {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 4px; cursor: pointer; font-size: 16px; font-weight: 500;
  color: var(--text-primary); list-style: none; transition: color 0.3s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 22px; font-weight: 300; color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease; line-height: 1;
}
.faq-item details[open] summary::after { transform: rotate(45deg); color: var(--brand-accent); }
.faq-item .faq-answer { padding: 0 4px 20px; font-size: 15px; color: var(--text-secondary); line-height: 1.8; }

.cta-section { background: linear-gradient(145deg, rgba(0,229,160,0.06), rgba(59,130,246,0.04)); border-top: 1px solid var(--border-glass); }
.cta-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 32px; border-radius: 12px; font-size: 15px; font-weight: 600;
  color: var(--bg-primary); background: var(--brand-accent);
  box-shadow: 0 0 20px rgba(0,229,160,0.3); transition: all 0.3s ease;
}
.cta-button:hover { box-shadow: 0 0 36px rgba(0,229,160,0.5); filter: brightness(1.08); transform: translateY(-1px); }
.cta-button:active { transform: scale(0.97); }
.cta-button.secondary { background: transparent; border: 1px solid rgba(255,255,255,0.15); color: var(--text-primary); box-shadow: none; }
.cta-button.secondary:hover { border-color: rgba(255,255,255,0.3); background: rgba(255,255,255,0.04); box-shadow: none; }

.site-footer { background: var(--bg-secondary); border-top: 1px solid var(--border-glass); padding-top: 64px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-logo { display: flex; align-items: baseline; gap: 8px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); margin-top: 16px; max-width: 320px; line-height: 1.7; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-col a { display: block; font-size: 14px; color: var(--text-secondary); padding: 6px 0; transition: color 0.3s ease; }
.footer-col a:hover { color: var(--brand-accent); }
.footer-bottom { border-top: 1px solid var(--border-glass); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-links { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }
.footer-links a:hover { color: var(--text-secondary); }
@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category2 */
:root {
      --bg-primary: #080D1A;
      --bg-secondary: #0D1526;
      --bg-elevated: #111D35;
      --brand-primary: #3B82F6;
      --brand-accent: #00E5A0;
      --text-primary: #E6EDF7;
      --text-secondary: #93A6C1;
      --text-muted: #5B6C84;
      --border-glass: rgba(255,255,255,0.08);
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      background: var(--bg-primary);
      color: var(--text-primary);
      font-family: var(--font-sans);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

    .site-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(8,13,26,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glass);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 40px;
    }
    .logo {
      display: flex;
      align-items: baseline;
      gap: 6px;
      flex-shrink: 0;
    }
    .logo-main {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      letter-spacing: -0.02em;
    }
    .logo-sub {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 40px;
      margin-left: auto;
    }
    .nav-link {
      position: relative;
      font-size: 15px;
      color: var(--text-secondary);
      padding: 8px 2px;
      transition: color .3s;
    }
    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
      border-radius: 2px;
      transition: width .3s;
    }
    .nav-link:hover { color: #fff; }
    .nav-link:hover::after { width: 60%; }
    .nav-link.active { color: #fff; }
    .nav-link.active::after { width: 100%; }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      padding: 8px;
    }
    .mobile-toggle span {
      width: 24px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 60;
      background: rgba(10,17,40,0.97);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      flex-direction: column;
      padding: 24px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-close {
      align-self: flex-end;
      font-size: 36px;
      color: #fff;
      width: 44px;
      height: 44px;
      line-height: 1;
    }
    .mobile-menu nav {
      display: flex;
      flex-direction: column;
      margin-top: 32px;
    }
    .mobile-menu nav a {
      font-size: 19px;
      line-height: 60px;
      color: var(--text-secondary);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      transition: color .3s, padding-left .3s;
    }
    .mobile-menu nav a:hover,
    .mobile-menu nav a.active {
      color: #fff;
      padding-left: 8px;
    }

    .page-hero {
      position: relative;
      min-height: 35vh;
      display: flex;
      align-items: center;
      background-size: cover;
      background-position: center;
      padding: 80px 0;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(5,10,24,0.88), rgba(8,13,26,0.86), rgba(8,13,26,0.94));
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--brand-accent);
      background: rgba(0,229,160,0.08);
      border: 1px solid rgba(0,229,160,0.2);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
    }
    .page-hero h1 {
      font-size: clamp(2.2rem, 5vw, 3.4rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #fff;
      line-height: 1.15;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-top: 14px;
      max-width: 520px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 32px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 28px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 500;
      transition: all .3s;
    }
    .btn-primary {
      background: var(--brand-accent);
      color: #0A1128;
      font-weight: 600;
      box-shadow: 0 0 24px rgba(0,229,160,0.3);
    }
    .btn-primary:hover {
      background: #00f0ac;
      box-shadow: 0 0 36px rgba(0,229,160,0.5);
      transform: translateY(-1px);
    }
    .btn-primary:active { transform: scale(0.97); }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.15);
      color: #fff;
    }
    .btn-ghost:hover {
      border-color: rgba(255,255,255,0.3);
      background: rgba(255,255,255,0.04);
    }
    .btn:focus-visible {
      outline: 2px solid var(--brand-accent);
      outline-offset: 2px;
    }

    .section { padding: 96px 0; }
    .section-alt { background: var(--bg-secondary); }
    .section-tag {
      display: inline-flex;
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-accent);
      letter-spacing: 0.04em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-head {
      max-width: 680px;
      margin-bottom: 48px;
    }
    .section-head h2 {
      font-size: clamp(1.8rem, 3vw, 2.3rem);
      font-weight: 700;
      color: #fff;
      letter-spacing: -0.01em;
      line-height: 1.25;
    }
    .section-head p {
      margin-top: 14px;
      color: var(--text-secondary);
      font-size: 16px;
    }
    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .split-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .split-row.reverse .split-media { order: 2; }
    .split-media {
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid var(--border-glass);
      background: var(--bg-elevated);
    }
    .split-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      aspect-ratio: 4/3;
    }
    .split-text h2 {
      font-size: clamp(1.5rem, 2.5vw, 2rem);
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
      line-height: 1.3;
    }
    .split-text p {
      color: var(--text-secondary);
      font-size: 16px;
      line-height: 1.9;
      margin-bottom: 14px;
    }
    .feature-list {
      list-style: none;
      margin-top: 20px;
    }
    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      color: var(--text-secondary);
      font-size: 15px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .feature-list li::before {
      content: "✓";
      color: var(--brand-accent);
      font-weight: 700;
      flex-shrink: 0;
    }

    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border-glass);
      border-radius: 16px;
      padding: 32px 28px;
      transition: border-color .3s, background .3s, transform .3s, box-shadow .3s;
    }
    .feature-card:hover {
      border-color: rgba(255,255,255,0.16);
      background: rgba(255,255,255,0.06);
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(0,0,0,0.35);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(59,130,246,0.1);
      border: 1px solid rgba(59,130,246,0.18);
      color: var(--brand-primary);
      margin-bottom: 20px;
    }
    .feature-card:nth-child(2) .feature-icon {
      background: rgba(0,229,160,0.1);
      border-color: rgba(0,229,160,0.18);
      color: var(--brand-accent);
    }
    .feature-card:nth-child(3) .feature-icon {
      background: rgba(139,92,246,0.1);
      border-color: rgba(139,92,246,0.18);
      color: #8B5CF6;
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scene-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border-glass);
      border-radius: 16px;
      padding: 28px 24px;
      transition: border-color .3s, transform .3s, box-shadow .3s;
    }
    .scene-card:hover {
      border-color: rgba(0,229,160,0.25);
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(0,0,0,0.35), 0 0 24px rgba(0,229,160,0.06);
    }
    .scene-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(0,229,160,0.08);
      border: 1px solid rgba(0,229,160,0.15);
      color: var(--brand-accent);
      margin-bottom: 18px;
    }
    .scene-card h3 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }
    .scene-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .step-card {
      position: relative;
      padding: 32px 24px;
      border-radius: 16px;
      border: 1px solid var(--border-glass);
      background: rgba(255,255,255,0.02);
      transition: border-color .3s, transform .3s;
    }
    .step-card:hover {
      border-color: rgba(0,229,160,0.3);
      transform: translateY(-2px);
    }
    .step-num {
      font-size: 42px;
      font-weight: 800;
      color: rgba(255,255,255,0.08);
      line-height: 1;
      display: block;
      margin-bottom: 20px;
      font-variant-numeric: tabular-nums;
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
    }

    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }
    .faq-list details {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .faq-list summary {
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 22px 0;
      font-size: 16px;
      font-weight: 500;
      color: #fff;
      cursor: pointer;
      transition: color .3s;
    }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary:hover { color: var(--brand-accent); }
    .faq-list summary::after {
      content: "+";
      font-size: 24px;
      font-weight: 400;
      color: var(--brand-accent);
      transition: transform .3s;
      line-height: 1;
    }
    .faq-list details[open] summary::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      padding: 0 0 24px;
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.85;
    }

    .cta-box {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border-glass);
      border-radius: 28px;
      padding: 56px 40px;
      text-align: center;
      overflow: hidden;
    }
    .cta-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 80px;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--brand-accent), transparent);
    }
    .cta-box h2 {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      line-height: 1.25;
    }
    .cta-box > p {
      color: var(--text-secondary);
      font-size: 16px;
      max-width: 520px;
      margin: 0 auto 28px;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .site-footer {
      border-top: 1px solid var(--border-glass);
      background: var(--bg-secondary);
      padding: 64px 0 32px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 48px;
    }
    .footer-logo {
      display: flex;
      align-items: baseline;
      gap: 6px;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 14px;
      color: var(--text-muted);
      max-width: 320px;
      line-height: 1.8;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 20px;
    }
    .footer-col a {
      display: block;
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 12px;
      transition: color .3s;
    }
    .footer-col a:hover { color: var(--brand-accent); }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 13px;
      color: var(--text-muted);
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-links {
      display: flex;
      gap: 8px;
    }
    .footer-links a { color: var(--text-secondary); transition: color .3s; }
    .footer-links a:hover { color: #fff; }
    .footer-links span { color: rgba(255,255,255,0.12); }

    @media (max-width: 1024px) {
      .section { padding: 72px 0; }
      .feature-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .scene-grid, .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .split-row { grid-template-columns: 1fr; gap: 40px; }
      .split-row.reverse .split-media { order: 0; }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-toggle { display: flex; }
      .header-inner { height: 64px; }
      .site-container { padding: 0 16px; }
      .page-hero { min-height: 50vh; padding: 64px 0; }
      .section { padding: 56px 0; }
      .section-head { margin-bottom: 32px; }
      .cta-box { padding: 36px 20px; }
      .footer-top { grid-template-columns: 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
      .feature-grid-3, .scene-grid, .steps-grid { grid-template-columns: 1fr; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .btn { width: 100%; }
    }