/* roulang page: index */
:root {
    --bg: #080D1A;
    --bg-2: #0E1526;
    --panel: rgba(255, 255, 255, 0.05);
    --panel-2: rgba(255, 255, 255, 0.09);
    --stroke: rgba(255, 255, 255, 0.12);
    --brand: #19D3AE;
    --brand-light: #6FE8D0;
    --accent: #FFB31A;
    --text: #E6EDF7;
    --muted: #93A0B5;
    --dim: #5D6B84;
    --radius-lg: 28px;
    --radius-md: 18px;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 18px 50px rgba(0, 0, 0, 0.45);
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body,
  h1,
  h2,
  h3,
  h4,
  p,
  figure,
  blockquote {
    margin: 0;
  }

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

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

  button,
  input {
    font: inherit;
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding-inline: 1.25rem;
  }

  .section {
    padding-block: 90px;
  }

  .section-sm {
    padding-block: 52px;
  }

  .glass {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.05));
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .glass-soft {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .grid-bg {
    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;
  }

  .text-gradient {
    background: linear-gradient(120deg, #ffffff 10%, rgba(255, 255, 255, 0.75) 45%, rgba(25, 211, 174, 0.8) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .text-gradient-brand {
    background: linear-gradient(90deg, #19D3AE, #6FE8D0, #19D3AE);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    min-height: 48px;
    padding: 0.7rem 1.8rem;
    border-radius: 48px;
    font-weight: 700;
    font-size: 15px;
    line-height: 1.2;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.25s ease;
    white-space: nowrap;
  }

  .btn-primary {
    background: linear-gradient(135deg, #19D3AE, #12B898);
    color: #06211b;
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.25), 0 0 24px rgba(25, 211, 174, 0.35);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.35), 0 0 38px rgba(25, 211, 174, 0.5);
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
  }

  .btn-accent {
    background: linear-gradient(135deg, #FFB31A, #FF9D21);
    color: #1c1405;
    box-shadow: 0 0 0 1px rgba(255, 179, 26, 0.25), 0 4px 20px rgba(255, 179, 26, 0.3);
  }

  .btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(255, 179, 26, 0.4), 0 0 34px rgba(255, 179, 26, 0.45);
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 48px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--muted);
    font-size: 13px;
    letter-spacing: 0.02em;
  }

  .badge-dot::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--brand);
    box-shadow: 0 0 10px var(--brand);
  }

  .eyebrow {
    color: var(--brand);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }

  .eyebrow::before {
    content: '';
    width: 22px;
    height: 2px;
    background: var(--brand);
    border-radius: 2px;
    box-shadow: 0 0 12px var(--brand);
  }

  .h2-title {
    font-size: clamp(30px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: #fff;
  }

  .h3-title {
    font-size: 22px;
    font-weight: 700;
  }

  .muted {
    color: var(--muted);
  }

  .dim {
    color: var(--dim);
  }

  .hover-lift {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    will-change: transform;
  }

  .hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(25, 211, 174, 0.35);
  }

  .site-nav {
    transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
    border-bottom: 1px solid transparent;
  }

  .site-nav.scrolled {
    background: rgba(8, 13, 26, 0.86);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .link-underline {
    position: relative;
  }

  .link-underline::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    height: 2px;
    width: 100%;
    background: linear-gradient(90deg, var(--brand), rgba(25, 211, 174, 0.2));
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.25s;
    transform: scaleX(0.8);
  }

  .link-underline:hover::after,
  .link-underline.active::after {
    opacity: 1;
    transform: scaleX(1);
  }

  .hero-bg {
    background-color: #080D1A;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
  }

  .hero-overlay {
    background:
      radial-gradient(ellipse at 22% 30%, rgba(25, 211, 174, 0.12) 0%, rgba(25, 211, 174, 0) 45%),
      linear-gradient(105deg, rgba(8, 13, 26, 0.94) 0%, rgba(8, 13, 26, 0.72) 50%, rgba(8, 13, 26, 0.68) 100%);
  }

  .panel-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 24px;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .icon-ring {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
  }

  .cms-list-row {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem 1.4rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(255, 255, 255, 0.07);
    transition: border-color 0.25s, background 0.25s, transform 0.25s;
  }

  .cms-list-row:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(25, 211, 174, 0.35);
    transform: translateX(4px);
  }

  .tag-pill {
    flex: 0 0 auto;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #c7d3e3;
    white-space: nowrap;
  }

  .img-mask {
    position: relative;
    overflow: hidden;
  }

  .img-mask::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 13, 26, 0.05) 0%, rgba(8, 13, 26, 0.55) 100%);
  }

  .content-line {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.16), transparent);
    height: 1px;
    border: 0;
  }

  .mobile-drawer {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  }

  .mobile-drawer.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  details.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    transition: background 0.25s ease;
  }

  details.faq-item:last-child {
    border-bottom: 0;
  }

  details.faq-item[open] {
    background: rgba(255, 255, 255, 0.03);
  }

  details.faq-item summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.5rem 1.2rem;
    font-size: 17px;
    font-weight: 700;
    color: #f1f5fb;
    transition: color 0.25s;
  }

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

  details.faq-item summary:hover {
    color: #19D3AE;
  }

  details.faq-item summary::after {
    content: '+';
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.16);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--brand);
    transition: transform 0.25s ease, background 0.25s ease, color 0.25s;
  }

  details.faq-item[open] summary::after {
    content: '−';
    transform: rotate(180deg);
    background: rgba(25, 211, 174, 0.18);
    border-color: rgba(25, 211, 174, 0.25);
  }

  details.faq-item .faq-answer {
    padding: 0 1.5rem 1.5rem 1.2rem;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.9;
  }

  .cover-shadow {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  }

  .topline {
    background: linear-gradient(90deg, transparent, rgba(25, 211, 174, 0.35), transparent);
  }

  .footer-link {
    color: #8190a5;
    font-size: 15px;
    line-height: 2;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-link:hover {
    color: #19D3AE;
    padding-left: 4px;
  }

  .social-icon {
    width: 14px;
    height: 14px;
    display: inline-block;
    filter: brightness(0.9);
    opacity: 0.85;
  }

  @media (max-width: 1023px) {
    .section {
      padding-block: 64px;
    }
  }

  @media (max-width: 639px) {
    .section {
      padding-block: 48px;
    }
  }

/* roulang page: category1 */
:root {
    --bg: #080D1A;
    --panel: #0E1526;
    --panel-soft: rgba(255, 255, 255, 0.05);
    --panel-mid: rgba(255, 255, 255, 0.08);
    --line: rgba(255, 255, 255, 0.1);
    --line-light: rgba(255, 255, 255, 0.14);
    --brand: #19D3AE;
    --brand-deep: #0E8877;
    --warm: #FFB31A;
    --warm-light: #FFC457;
    --text: #E6EDF7;
    --text-muted: #93A0B5;
    --text-dim: #5D6B84;
    --radius-card: 24px;
    --radius-btn: 999px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lift: 0 18px 50px rgba(0, 0, 0, 0.45);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

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

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

  button {
    font-family: inherit;
    background: none;
    border: none;
    cursor: pointer;
  }

  a,
  button {
    -webkit-tap-highlight-color: transparent;
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding-inline: 1.25rem;
  }

  @media (min-width: 768px) {
    .container {
      padding-inline: 2rem;
    }
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 60;
    background: rgba(8, 13, 26, 0.35);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease;
  }

  body.scrolled .site-header {
    background: rgba(7, 11, 21, 0.88);
    border-color: rgba(255, 255, 255, 0.06);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 76px;
    gap: 1rem;
  }

  @media (min-width: 1024px) {
    .header-inner {
      min-height: 86px;
    }
  }

  .logo-mark {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-weight: 900;
    font-size: 20px;
    color: #061C17;
    background: linear-gradient(135deg, #19D3AE, #0E8877);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.4), 0 0 24px rgba(25, 211, 174, 0.2);
    letter-spacing: 0;
  }

  .logo-text {
    font-size: 19px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: #fff;
    white-space: nowrap;
  }

  @media (max-width: 480px) {
    .logo-text {
      font-size: 17px;
    }
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    color: #B9C6D8;
    transition: color 0.25s ease;
  }

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

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 2px;
    border-radius: 4px;
    background: linear-gradient(90deg, #19D3AE, #55edca);
    transform: scaleX(0);
    transform-origin: left center;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: 0 0 12px rgba(25, 211, 174, 0.7);
  }

  .nav-link:hover::after {
    transform: scaleX(1);
    opacity: 1;
  }

  .nav-link.current {
    color: #fff;
  }

  .nav-link.current::after {
    transform: scaleX(1);
    opacity: 1;
  }

  .btn-cta-warm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 22px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 800;
    color: #2B1B00;
    background: linear-gradient(135deg, #FFB31A, #FF9A3D);
    box-shadow: 0 0 0 1px rgba(255, 179, 26, 0.2), 0 0 22px rgba(255, 179, 26, 0.28);
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  }

  .btn-cta-warm:hover {
    transform: translateY(-2px);
    filter: brightness(1.06);
    box-shadow: 0 0 0 1px rgba(255, 179, 26, 0.3), 0 0 32px rgba(255, 179, 26, 0.42);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 52px;
    padding: 0 30px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    font-weight: 800;
    color: #06221D;
    background: linear-gradient(135deg, #19D3AE, #2DE0BC);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.22), 0 0 26px rgba(25, 211, 174, 0.3);
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.05);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.34), 0 0 40px rgba(25, 211, 174, 0.42);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 52px;
    padding: 0 28px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    font-weight: 700;
    color: #E6EDF7;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.16);
    transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  }

  .btn-secondary:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.34);
    background: rgba(255, 255, 255, 0.08);
  }

  .mobile-menu {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.45s ease, opacity 0.3s ease;
    background: rgba(8, 13, 26, 0.97);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .mobile-menu.open {
    max-height: 620px;
    opacity: 1;
  }

  .mobile-menu a {
    display: flex;
    align-items: center;
    min-height: 52px;
    padding: 0 1.25rem;
    font-size: 16px;
    font-weight: 600;
    color: #C4D0E0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

  .mobile-menu a.current {
    color: #19D3AE;
  }

  .cat-hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 680px;
    padding: 150px 0 74px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    overflow: hidden;
  }

  .cat-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 12% 20%, rgba(25, 211, 174, 0.2), transparent 34%),
      radial-gradient(ellipse at 82% 12%, rgba(255, 179, 26, 0.12), transparent 30%),
      linear-gradient(180deg, rgba(7, 11, 21, 0.78) 0%, rgba(7, 11, 21, 0.55) 42%, #080D1A 100%);
  }

  .cat-hero::after {
    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: 52px 52px;
    pointer-events: none;
  }

  .hero-content {
    position: relative;
    z-index: 2;
  }

  .breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    color: #AAB7CC;
    font-size: 13px;
  }

  .breadcrumb a {
    transition: color 0.2s ease;
  }

  .breadcrumb a:hover {
    color: #fff;
  }

  .eyebrow-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 30px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: #19D3AE;
  }

  .eyebrow-badge::before {
    content: "";
    width: 20px;
    height: 2px;
    background: linear-gradient(90deg, #19D3AE, transparent);
  }

  .hero-h1 {
    margin-top: 14px;
    font-size: clamp(2.2rem, 5vw, 4.1rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: 1px;
    color: #fff;
  }

  .hero-sub {
    margin-top: 20px;
    max-width: 760px;
    color: #C3D0E1;
    font-size: 16px;
    line-height: 1.9;
  }

  @media (min-width: 768px) {
    .hero-sub {
      font-size: 18px;
    }
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 34px;
  }

  .hero-stat {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 58px;
    padding-top: 28px;
  }

  .hero-stat-item {
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 18px 8px 0;
  }

  .hero-stat-label {
    font-size: 13px;
    color: #7E8CA2;
    letter-spacing: 0.2px;
  }

  .hero-stat-desc {
    font-size: 15px;
    color: #E6EDF7;
    font-weight: 600;
    margin-top: 4px;
  }

  @media (max-width: 767px) {
    .hero-stat-item {
      border-left: none;
    }
  }

  .section-pad {
    padding: 84px 0;
  }

  @media (min-width: 768px) {
    .section-pad {
      padding: 112px 0;
    }
  }

  .section-header {
    max-width: 860px;
    margin-bottom: 54px;
  }

  .section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1.2px;
    color: #19D3AE;
  }

  .section-eyebrow::before {
    content: "";
    width: 28px;
    height: 2px;
    background: #19D3AE;
    border-radius: 2px;
  }

  .section-title {
    margin-top: 18px;
    font-size: clamp(1.9rem, 3.4vw, 3rem);
    font-weight: 900;
    line-height: 1.25;
    color: #fff;
    letter-spacing: 0.2px;
  }

  .section-intro {
    margin-top: 18px;
    font-size: 16px;
    color: #93A0B5;
    line-height: 1.9;
  }

  .glass-card {
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 26px;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.025) 100%);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-lift);
  }

  .feature-media {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .media-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 13, 26, 0.05) 0%, rgba(8, 13, 26, 0.82) 86%, rgba(8, 13, 26, 0.92) 100%);
  }

  .mini-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 260px;
    padding: 28px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  }

  .mini-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.19);
    transform: translateY(-4px);
  }

  .card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: rgba(25, 211, 174, 0.12);
    border: 1px solid rgba(25, 211, 174, 0.22);
    color: #19D3AE;
    font-size: 22px;
    font-weight: 800;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: #E6EDF7;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.13);
  }

  .tag-brand {
    color: #19D3AE;
    background: rgba(25, 211, 174, 0.08);
    border-color: rgba(25, 211, 174, 0.22);
  }

  .use-case-list {
    display: flex;
    flex-direction: column;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .use-case-item {
    position: relative;
    display: grid;
    gap: 10px;
    padding: 26px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.2s ease;
  }

  @media (min-width: 768px) {
    .use-case-item {
      padding: 30px 40px 30px 0;
    }
  }

  .use-case-item h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 800;
  }

  .use-case-item p {
    color: #8D9BB2;
    font-size: 15px;
  }

  .use-case-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #19D3AE;
    box-shadow: 0 0 0 5px rgba(25, 211, 174, 0.1);
  }

  .steps-section {
    position: relative;
    background: rgba(11, 18, 36, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .step-card {
    position: relative;
    min-height: 220px;
    padding: 28px 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .step-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-size: 18px;
    font-weight: 900;
    color: #19D3AE;
    background: rgba(25, 211, 174, 0.09);
    border: 1px solid rgba(25, 211, 174, 0.22);
  }

  .step-card h3 {
    margin-top: 20px;
    color: #fff;
    font-size: 19px;
    font-weight: 800;
  }

  .step-card p {
    margin-top: 10px;
    color: #8D9BB2;
    font-size: 14px;
    line-height: 1.8;
  }

  .line-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #19D3AE;
    font-size: 14px;
    font-weight: 800;
    transition: filter 0.25s ease;
  }

  .line-link:hover {
    filter: brightness(1.25);
  }

  .promo-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
    transition: transform 0.5s ease;
  }

  .promo-card:hover .promo-img {
    transform: scale(1.035);
  }

  .info-card {
    padding: 28px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
  }

  .info-card h3 {
    color: #fff;
    font-size: 17px;
    font-weight: 800;
  }

  .info-card p {
    color: #8D9BB2;
    font-size: 14px;
    margin-top: 8px;
  }

  .promo-media-wrap {
    position: relative;
    height: 100%;
    min-height: 300px;
    overflow: hidden;
    border-radius: 24px;
  }

  .promo-media-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 13, 26, 0.25), rgba(8, 13, 26, 0.72));
  }

  .promo-title {
    position: relative;
    z-index: 2;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 24px;
  }

  .text-muted {
    color: #93A0B5;
  }

  .text-dim {
    color: #5D6B84;
  }

  .dark-band {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    background: #0B1224;
  }

  .faq-section {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .faq-wrap {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.025);
    padding: 16px;
  }

  .accordion-item {
    border: 1px solid transparent;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.035);
    margin-bottom: 12px;
    transition: background 0.3s ease, border-color 0.3s ease;
  }

  .accordion-item:last-child {
    margin-bottom: 0;
  }

  .accordion-item.open {
    background: rgba(255, 255, 255, 0.065);
    border-color: rgba(25, 211, 174, 0.2);
  }

  .accordion-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    padding: 18px 20px;
    text-align: left;
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    border-radius: 18px;
  }

  .accordion-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    color: #19D3AE;
    background: rgba(25, 211, 174, 0.1);
    font-size: 20px;
    line-height: 1;
    transition: transform 0.3s ease;
  }

  .accordion-item.open .accordion-icon {
    transform: rotate(45deg);
  }

  .accordion-body {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.35s ease, padding 0.4s ease;
    padding: 0 20px;
  }

  .accordion-body.open {
    max-height: 340px;
    opacity: 1;
    padding: 4px 20px 20px;
  }

  .accordion-body p {
    color: #9AA9BE;
    font-size: 15px;
    line-height: 1.9;
  }

  .cta-section {
    position: relative;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
  }

  .cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(8, 13, 26, 0.94), rgba(8, 13, 26, 0.68), rgba(8, 13, 26, 0.88));
  }

  .cta-inner {
    position: relative;
    z-index: 2;
  }

  .footer {
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    background: #070B15;
    color: #8C9AB1;
    position: relative;
  }

  .footer-topline {
    height: 1px;
    width: 100%;
    background: linear-gradient(90deg, transparent, rgba(25, 211, 174, 0.35), rgba(255, 179, 26, 0.2), transparent);
  }

  .footer-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    color: #8C9AB1;
    font-size: 14px;
    width: fit-content;
    transition: color 0.25s ease, transform 0.25s ease;
  }

  .footer-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 1px;
    background: #19D3AE;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.3s ease;
  }

  .footer-link:hover {
    color: #fff;
    transform: translateX(3px);
  }

  .footer-link:hover::after {
    transform: scaleX(1);
  }

  .footer-social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: #19D3AE;
    font-size: 14px;
    transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  }

  .footer-social:hover {
    background: rgba(25, 211, 174, 0.1);
    border-color: rgba(25, 211, 174, 0.3);
    color: #fff;
  }

  .footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
  }

  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  }

  .link-underline {
    position: relative;
  }

  .link-underline::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 3px;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.25s ease;
  }

  .link-underline:hover::after,
  .link-underline.active::after {
    transform: scaleX(1);
  }

  .focus-visible-outline:focus-visible,
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid rgba(25, 211, 174, 0.8);
    outline-offset: 4px;
    border-radius: 6px;
  }

  .promo-card {
    position: relative;
    min-height: 300px;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-card);
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
  }

  .promo-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: var(--shadow-lift);
  }

/* roulang page: article */
:root {
    --page-bg: #080D1A;
    --bg-deep: #070B15;
    --bg-card: #0C1322;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.12);
    --brand: #19D3AE;
    --brand-soft: rgba(25, 211, 174, 0.14);
    --brand-glow: rgba(25, 211, 174, 0.45);
    --accent: #FFB31A;
    --text: #E6EDF7;
    --text-2: #93A0B5;
    --text-3: #5D6B84;
    --radius: 28px;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--page-bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
    overflow-x: hidden;
    line-height: 1.75;
  }

  ::selection {
    background: rgba(25, 211, 174, 0.28);
    color: #fff;
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  .site-header {
    background: rgba(8, 13, 26, 0.72);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .site-header.is-scrolled {
    background: rgba(7, 11, 21, 0.86);
    border-bottom-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  }

  .logo-mark {
    background: linear-gradient(135deg, #19D3AE, #0E8877);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.18), 0 8px 24px rgba(25, 211, 174, 0.25);
  }

  .link-underline {
    position: relative;
    padding-bottom: 6px;
  }

  .link-underline::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #19D3AE, transparent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.25s ease;
  }

  .link-underline:hover::after,
  .link-underline.active::after {
    transform: scaleX(1);
  }

  .link-underline.active {
    color: #fff;
  }

  .btn-primary,
  .btn-ghost,
  .btn-dark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 24px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    transition: all 0.25s ease;
    cursor: pointer;
    white-space: nowrap;
  }

  .btn-primary {
    background: linear-gradient(135deg, #19D3AE, #0F9E82);
    color: #06251F;
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.22), 0 0 24px rgba(25, 211, 174, 0.35);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(25, 211, 174, 0.35), 0 0 34px rgba(25, 211, 174, 0.55);
    color: #06251F;
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: #E6EDF7;
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(12px);
  }

  .btn-ghost:hover {
    transform: translateY(-2px);
    border-color: rgba(25, 211, 174, 0.55);
    color: #fff;
    background: rgba(25, 211, 174, 0.1);
  }

  .topline {
    background: linear-gradient(90deg, transparent, rgba(25, 211, 174, 0.5), rgba(255, 179, 26, 0.35), transparent);
  }

  .footer-link {
    font-size: 14px;
    color: #77869D;
    line-height: 2.3;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-link:hover {
    color: #19D3AE;
    padding-left: 4px;
  }

  .breadcrumb-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(14px);
    color: #8FA0B8;
    font-size: 13px;
  }

  .breadcrumb-pill a {
    color: #19D3AE;
    transition: color 0.2s ease;
  }

  .breadcrumb-pill a:hover {
    color: #fff;
  }

  .article-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: #19D3AE;
    letter-spacing: 0.4px;
  }

  .article-title {
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.2;
    letter-spacing: 0.01em;
    font-weight: 800;
    color: #F2F7FD;
    text-wrap: balance;
  }

  .article-excerpt {
    color: #B6C5D8;
    line-height: 1.9;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #93A0B5;
    font-size: 13px;
  }

  .cover-frame {
    border-radius: 30px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
    background: #0B1220;
  }

  .cover-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(8, 13, 26, 0) 55%, rgba(8, 13, 26, 0.28) 100%);
  }

  .article-card {
    background: linear-gradient(180deg, #0D1526, #0A1120);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 32px;
    padding: clamp(28px, 5vw, 56px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  }

  .article-body {
    font-size: 16px;
    line-height: 1.95;
    color: #C6D4E4;
  }

  .article-body > *:last-child {
    margin-bottom: 0;
  }

  .article-body h2 {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.35;
    color: #F1F6FC;
    margin: 1.8em 0 0.8em;
    letter-spacing: -0.01em;
  }

  .article-body h3 {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    color: #E9F0F8;
    margin: 1.8em 0 0.7em;
  }

  .article-body h4 {
    font-size: 19px;
    font-weight: 700;
    color: #DFE8F2;
    margin: 1.6em 0 0.6em;
  }

  .article-body p {
    margin: 0 0 1.6em;
  }

  .article-body strong {
    color: #F0F5FB;
    font-weight: 700;
  }

  .article-body ul,
  .article-body ol {
    margin: 0 0 1.8em;
    padding-left: 1.5em;
  }

  .article-body ul {
    list-style: disc;
  }

  .article-body ol {
    list-style: decimal;
  }

  .article-body li {
    margin-bottom: 0.5em;
  }

  .article-body a {
    color: #24E0BB;
    text-decoration: underline;
    text-decoration-color: rgba(25, 211, 174, 0.45);
    text-underline-offset: 4px;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
  }

  .article-body a:hover {
    color: #fff;
    text-decoration-color: #fff;
  }

  .article-body blockquote {
    margin: 2em 0;
    padding: 1.2em 1.6em;
    border-left: 4px solid #19D3AE;
    border-radius: 0 18px 18px 0;
    background: rgba(25, 211, 174, 0.08);
    color: #C9D6E5;
    font-style: normal;
  }

  .article-body blockquote p {
    margin-bottom: 0;
  }

  .article-body img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    margin: 2em 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .article-body table {
    display: block;
    width: 100%;
    overflow-x: auto;
    margin: 2em 0;
    border-collapse: collapse;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
  }

  .article-body table th,
  .article-body table td {
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 16px;
    text-align: left;
    font-size: 15px;
  }

  .article-body table th {
    background: rgba(25, 211, 174, 0.1);
    color: #E8F3EF;
    font-weight: 700;
  }

  .article-body code {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 2px 8px;
    font-size: 0.9em;
    color: #9DF2E0;
  }

  .article-body hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
    margin: 2.5em 0;
  }

  .tag-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 5px 15px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #C7D4E4;
    font-size: 13px;
    font-weight: 500;
  }

  .article-meta-divider {
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.02) 70%);
  }

  .section-heading {
    font-size: clamp(26px, 3vw, 38px);
    font-weight: 800;
    line-height: 1.3;
    color: #F0F5FB;
    letter-spacing: -0.01em;
  }

  .section-subtext {
    color: #8C9AB1;
    font-size: 15px;
  }

  .arrow-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #19D3AE;
    font-size: 14px;
    font-weight: 600;
    transition: gap 0.2s ease, color 0.2s ease;
  }

  .arrow-link:hover {
    color: #fff;
    gap: 10px;
  }

  .read-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 28px;
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
  }

  .read-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.075);
    border-color: rgba(25, 211, 174, 0.45);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  }

  .read-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(25, 211, 174, 0.15);
    color: #19D3AE;
    font-weight: 800;
    font-size: 18px;
  }

  .faq-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 20px;
    overflow: hidden;
    transition: border-color 0.3s ease, background 0.3s ease;
  }

  .faq-item.open {
    border-color: rgba(25, 211, 174, 0.35);
    background: rgba(25, 211, 174, 0.07);
  }

  .faq-toggle {
    width: 100%;
    min-height: 64px;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    text-align: left;
    color: #E8F0F8;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.5;
    transition: color 0.2s ease;
  }

  .faq-toggle:hover {
    color: #fff;
  }

  .faq-icon {
    width: 30px;
    height: 30px;
    min-width: 30px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #19D3AE;
    font-style: normal;
    font-weight: 300;
    font-size: 20px;
    line-height: 1;
    transition: transform 0.3s ease, background 0.3s ease;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: rgba(25, 211, 174, 0.2);
  }

  .faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.35s ease;
  }

  .faq-answer-inner {
    overflow: hidden;
    color: #A7B5CA;
    font-size: 15px;
    line-height: 1.9;
    padding: 0 24px;
  }

  .faq-item.open .faq-answer {
    grid-template-rows: 1fr;
  }

  .faq-item.open .faq-answer-inner {
    padding-bottom: 24px;
  }

  .cta-panel {
    background:
      radial-gradient(circle at 76% 40%, rgba(25, 211, 174, 0.22), transparent 34%),
      linear-gradient(135deg, #0C1C28, #081019);
    border: 1px solid rgba(25, 211, 174, 0.2);
    box-shadow: 0 0 60px rgba(25, 211, 174, 0.08);
    border-radius: 36px;
    overflow: hidden;
  }

  .cta-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("/assets/images/backpic/back-2.webp");
    background-size: cover;
    background-position: center;
    opacity: 0.18;
    pointer-events: none;
  }

  .decor-glow {
    position: absolute;
    top: -120px;
    left: 50%;
    width: 420px;
    height: 420px;
    margin-left: -210px;
    background: radial-gradient(circle, rgba(25, 211, 174, 0.2), transparent 64%);
    pointer-events: none;
  }

  .copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.05);
    color: #AEBACB;
    font-size: 14px;
    transition: all 0.2s ease;
  }

  .copy-btn:hover {
    color: #fff;
    border-color: rgba(25, 211, 174, 0.45);
  }

  .not-found-card {
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 56px 28px;
    backdrop-filter: blur(14px);
  }

  .mobile-nav-panel {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s ease, opacity 0.25s ease;
  }

  .mobile-nav-panel.open {
    max-height: 480px;
    opacity: 1;
  }

  @media (max-width: 980px) {
    .container {
      padding-left: 20px;
      padding-right: 20px;
    }

    .article-card {
      padding: 28px 24px;
    }
  }

  @media (max-width: 640px) {
    .article-card {
      border-radius: 24px;
    }

    .meta-chip {
      padding: 6px 12px;
    }

    .breadcrumb-pill {
      padding: 8px 14px;
    }
  }

/* roulang page: category3 */
:root {
      --page-bg: #080D1A;
      --surface-2: #0E1526;
      --glass: rgba(255, 255, 255, 0.05);
      --glass-2: rgba(255, 255, 255, 0.08);
      --stroke: rgba(255, 255, 255, 0.12);
      --primary: #19D3AE;
      --primary-deep: #0E8877;
      --accent: #FFB31A;
      --headline: #E6EDF7;
      --bodytext: #B6C3D8;
      --muted: #7D8CA3;
      --faint: #56647B;
      --danger: #F26D6D;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-pill: 999px;
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
      --shadow-soft: 0 12px 40px rgba(0, 0, 0, 0.35);
      --shadow-glow: 0 0 0 1px rgba(25, 211, 174, 0.22), 0 0 26px rgba(25, 211, 174, 0.35);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--page-bg);
      color: var(--headline);
      font-family: var(--font-main);
      letter-spacing: 0.01em;
      line-height: 1.7;
      margin: 0;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }

    body.no-scroll {
      overflow: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .header-sticky {
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      background: rgba(8, 13, 26, 0.82);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: background .3s ease, box-shadow .3s ease, border .3s ease;
    }

    .header-sticky.scrolled {
      background: rgba(8, 13, 26, 0.92);
      border-bottom: 1px solid var(--stroke);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    }

    .link-underline {
      position: relative;
      padding: 8px 2px;
      transition: color .25s ease;
    }

    .link-underline::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 100%;
      height: 2px;
      border-radius: 99px;
      background: var(--primary);
      transform: scaleX(0);
      transform-origin: right center;
      transition: transform .3s ease;
    }

    .link-underline:hover::after,
    .link-underline.active::after {
      transform: scaleX(1);
      transform-origin: left center;
    }

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 48px;
      padding: 0 26px;
      border-radius: var(--radius-pill);
      background: var(--primary);
      color: #03231C;
      font-weight: 700;
      font-size: 15px;
      white-space: nowrap;
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 8px 30px rgba(25, 211, 174, 0.14), 0 0 18px rgba(25, 211, 174, 0.12);
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }

    .btn-primary:hover {
      background: #3BDFBF;
      transform: translateY(-2px);
      box-shadow: var(--shadow-glow);
    }

    .btn-primary:active {
      transform: translateY(0);
      background: var(--primary-deep);
    }

    .btn-accent {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-width: 120px;
      height: 46px;
      padding: 0 22px;
      border-radius: var(--radius-pill);
      background: var(--accent);
      color: #231903;
      font-weight: 800;
      font-size: 14px;
      white-space: nowrap;
      border: 1px solid rgba(255, 255, 255, 0.12);
      box-shadow: 0 10px 30px rgba(255, 179, 26, 0.18), 0 0 14px rgba(255, 179, 26, 0.08);
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }

    .btn-accent:hover {
      background: #FFC144;
      box-shadow: 0 0 0 1px rgba(255, 179, 26, 0.28), 0 0 28px rgba(255, 179, 26, 0.35);
      transform: translateY(-2px);
    }

    .btn-accent:active {
      transform: translateY(0);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 48px;
      padding: 0 25px;
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.05);
      color: var(--headline);
      font-weight: 600;
      font-size: 15px;
      white-space: nowrap;
      border: 1px solid var(--stroke);
      backdrop-filter: blur(10px);
      transition: border .25s ease, background .25s ease, transform .25s ease;
    }

    .btn-ghost:hover {
      border-color: rgba(25, 211, 174, 0.5);
      background: rgba(255, 255, 255, 0.09);
      transform: translateY(-1px);
    }

    .glass-card {
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03));
      border: 1px solid var(--stroke);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: var(--shadow-soft);
      transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
    }

    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(25, 211, 174, 0.35);
      box-shadow: 0 20px 55px rgba(0, 0, 0, 0.45);
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 14px;
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--stroke);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .04em;
      backdrop-filter: blur(8px);
    }

    .stat-card {
      border-radius: var(--radius-md);
      padding: 24px 22px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-link {
      display: inline-block;
      padding: 6px 0;
      color: #8290A8;
      font-size: 14px;
      line-height: 1.7;
      transition: color .25s ease, transform .25s ease;
    }

    .footer-link:hover {
      color: #19D3AE;
      text-decoration: none;
      transform: translateX(3px);
    }

    .topline {
      background: linear-gradient(90deg, transparent, rgba(25, 211, 174, 0.35), rgba(255, 179, 26, 0.3), transparent);
    }

    .bg-grid {
      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: 56px 56px;
    }

    .hero-backdrop {
      background: linear-gradient(180deg, rgba(8, 13, 26, 0.35) 0%, rgba(8, 13, 26, 0.72) 100%), radial-gradient(ellipse at 30% 40%, rgba(25, 211, 174, 0.2), transparent 60%), radial-gradient(ellipse at 80% 90%, rgba(255, 179, 26, 0.12), transparent 55%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    }

    .hero-overlay {
      background: radial-gradient(ellipse at center, rgba(8, 13, 26, 0.72), rgba(8, 13, 26, 0.3));
    }

    .faq-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      transition: border-color .25s ease, background .25s ease;
    }

    .faq-item.open {
      border-color: rgba(25, 211, 174, 0.35);
      background: rgba(255, 255, 255, 0.05);
    }

    .faq-question {
      cursor: pointer;
      transition: background .25s ease;
    }

    .faq-question .faq-icon {
      transition: transform .3s ease, color .3s ease;
      color: var(--primary);
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease;
    }

    .faq-answer-inner {
      padding: 0 20px 18px;
    }

    .cover-card {
      position: relative;
      border-radius: 24px;
      overflow: hidden;
    }

    .cover-card .cover-img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .cover-card::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(8, 13, 26, 0) 40%, rgba(8, 13, 26, 0.82) 100%);
    }

    .mobile-nav {
      max-height: 0;
      overflow: hidden;
      opacity: 0;
      transition: max-height .4s ease, opacity .3s ease, padding .3s ease;
    }

    .mobile-nav.open {
      max-height: 560px;
      opacity: 1;
    }

    .menu-btn {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(255, 255, 255, 0.04);
      color: #fff;
      cursor: pointer;
      transition: border-color .25s ease;
    }

    .menu-btn:hover {
      border-color: rgba(25, 211, 174, 0.5);
    }

    .cta-background {
      background: linear-gradient(120deg, rgba(25, 211, 174, 0.14), rgba(255, 179, 26, 0.08)), url('/assets/images/backpic/back-3.png') center bottom / cover no-repeat;
    }

    .step-line {
      position: relative;
    }

    @media (max-width: 640px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .hero-backdrop {
        min-height: 70vh;
      }

      .stat-card {
        padding: 18px 16px;
      }
    }

/* roulang page: category2 */
:root {
    --bg: #080D1A;
    --bg2: #0E1526;
    --panel: rgba(255,255,255,.05);
    --panel-high: rgba(255,255,255,.09);
    --line: rgba(255,255,255,.12);
    --brand: #19D3AE;
    --brand-deep: #0E8877;
    --accent: #FFB31A;
    --text-hi: #E6EDF7;
    --text-mid: #93A0B5;
    --text-low: #5D6B84;
    --radius-card: 26px;
    --radius-btn: 48px;
    --shadow-lg: 0 18px 50px rgba(0,0,0,.45);
    --transition: .25s ease;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text-hi);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  .container {
    max-width: 1280px;
    margin-inline: auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  .section-pad {
    padding: 92px 0;
  }

  a {
    text-decoration: none;
    color: var(--text-hi);
  }

  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
  }

  .topline {
    background: linear-gradient(90deg, transparent, rgba(25,211,174,.5), transparent);
  }

  .glass-card {
    background: linear-gradient(145deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
    border: 1px solid rgba(255,255,255,.09);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: var(--radius-card);
    box-shadow: 0 8px 30px rgba(0,0,0,.3);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 26px;
    border-radius: var(--radius-btn);
    background: linear-gradient(135deg, var(--brand), #0fbf9f);
    color: #041f19;
    font-weight: 800;
    font-size: 16px;
    white-space: nowrap;
    box-shadow: 0 0 0 1px rgba(25,211,174,.28), 0 0 24px rgba(25,211,174,.35);
    transition: var(--transition);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(25,211,174,.4), 0 0 38px rgba(25,211,174,.55);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 26px;
    border-radius: var(--radius-btn);
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.18);
    color: #E6EDF7;
    font-weight: 700;
    backdrop-filter: blur(8px);
    transition: var(--transition);
  }

  .btn-ghost:hover {
    border-color: rgba(25,211,174,.5);
    color: #fff;
    background: rgba(255,255,255,.08);
    transform: translateY(-2px);
  }

  .link-underline {
    position: relative;
    padding-bottom: 6px;
    transition: color var(--transition);
  }

  .link-underline::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--brand);
    transition: width .25s ease;
  }

  .link-underline:hover::after,
  .link-underline.active::after {
    width: 100%;
  }

  .tag-pill {
    display: inline-flex;
    align-items: center;
    padding: 5px 13px;
    border-radius: 999px;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.13);
    font-size: 13px;
    color: #B8C6DB;
    font-weight: 500;
  }

  .hero-grid {
    background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.85), transparent 72%);
  }

  .hero-radial {
    background: radial-gradient(ellipse at 16% 18%, rgba(25,211,174,.2), transparent 38%), radial-gradient(circle at 86% 24%, rgba(255,179,26,.1), transparent 30%);
  }

  .footer-link {
    display: inline-block;
    font-size: 14px;
    color: #7D8CA3;
    line-height: 2.4;
    transition: color .2s;
  }

  .footer-link:hover {
    color: #19D3AE;
  }

  .content-card {
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  }

  .content-card:hover {
    transform: translateY(-5px);
    border-color: rgba(25,211,174,.3);
    box-shadow: 0 18px 50px rgba(0,0,0,.35);
  }

  .faq-item {
    background: rgba(255,255,255,.035);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 20px;
    transition: border-color .25s;
  }

  .faq-item.faq-open {
    border-color: rgba(25,211,174,.35);
    background: rgba(255,255,255,.05);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }

  .faq-q-icon {
    transition: transform .3s;
  }

  .faq-open .faq-q-icon {
    transform: rotate(45deg);
  }

  .card-img-wrap {
    position: relative;
    overflow: hidden;
    border-radius: 18px;
  }

  .card-img-wrap img {
    display: block;
    width: 100%;
    height: 190px;
    object-fit: cover;
    transition: transform .5s ease;
  }

  .content-card:hover .card-img-wrap img {
    transform: scale(1.03);
  }

  .step-item {
    position: relative;
    padding-left: 34px;
  }

  .step-item::before {
    content: attr(data-step);
    position: absolute;
    left: 0;
    top: 2px;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(25,211,174,.15);
    border: 1px solid rgba(25,211,174,.3);
    color: #19D3AE;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 800;
  }

  @media (max-width: 1024px) {
    .section-pad {
      padding: 64px 0;
    }
  }

  @media (max-width: 640px) {
    .section-pad {
      padding: 48px 0;
    }
    .container {
      padding-left: 18px;
      padding-right: 18px;
    }
    .card-img-wrap img {
      height: 160px;
    }
  }