/* roulang page: index */
:root {
    --bg: #060B16;
    --surface: #0F1D2F;
    --surface-soft: rgba(15, 29, 47, 0.6);
    --accent: #3DD6D0;
    --accent-deep: #2974DA;
    --text: #EAF4FF;
    --text-soft: #8FA6C3;
    --muted: #5D7290;
    --success: #20C997;
    --warning: #E8B658;
    --danger: #E27070;
    --radius-xl: 24px;
    --radius-lg: 16px;
    --radius-md: 12px;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
      radial-gradient(600px 260px at 12% -5%, rgba(61, 214, 208, 0.10), transparent 60%),
      radial-gradient(700px 320px at 95% 28%, rgba(41, 116, 218, 0.10), transparent 55%),
      radial-gradient(700px 420px at 50% 110%, rgba(61, 214, 208, 0.06), transparent 60%),
      var(--bg);
  }

  body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
      linear-gradient(to right, rgba(80, 140, 255, 0.06) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(80, 140, 255, 0.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.55), transparent 85%);
  }

  img {
    max-width: 100%;
  }

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

  button {
    font-family: inherit;
  }

  .container-x {
    width: 100%;
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

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

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

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 60;
    background: rgba(6, 11, 22, 0.76);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .site-header.scrolled {
    border-bottom-color: rgba(255, 255, 255, 0.13);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: 0.9rem;
    letter-spacing: 0.03em;
    color: rgba(234, 244, 255, 0.72);
    padding: 0.25rem 0;
    transition: color 0.25s ease;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -2px;
    width: 0;
    height: 1.5px;
    transform: translateX(-50%);
    background: var(--accent);
    border-radius: 999px;
    transition: width 0.3s ease;
  }

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

  .nav-link:hover::after {
    width: 18px;
  }

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

  .nav-link.active::after {
    width: 18px;
  }

  .glass-panel {
    background: rgba(15, 29, 47, 0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.09);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 44px;
    padding: 0 1.3rem;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #3DD6D0, #2BB6BE);
    color: #041820;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    box-shadow: 0 0 18px rgba(61, 214, 208, 0.22), 0 10px 24px rgba(0, 0, 0, 0.22);
    transition: transform 0.22s ease, box-shadow 0.22s ease;
  }

  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 26px rgba(61, 214, 208, 0.36), 0 12px 26px rgba(0, 0, 0, 0.3);
  }

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

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 44px;
    padding: 0 1.3rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(234, 244, 255, 0.9);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.22s ease, background 0.22s ease, color 0.22s ease;
  }

  .btn-secondary:hover {
    border-color: rgba(61, 214, 208, 0.5);
    color: #ffffff;
    background: rgba(61, 214, 208, 0.06);
  }

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

  .btn-sm-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    height: 36px;
    padding: 0 0.95rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(234, 244, 255, 0.85);
    font-size: 0.83rem;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
  }

  .btn-sm-ghost:hover {
    border-color: rgba(61, 214, 208, 0.45);
    color: #ffffff;
    background: rgba(61, 214, 208, 0.05);
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--accent);
  }

  .eyebrow::before {
    content: "";
    width: 22px;
    height: 1px;
    background: var(--accent);
  }

  .section-title {
    margin-top: 0.65rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: #ffffff;
    line-height: 1.25;
  }

  .section-subtitle {
    margin-top: 0.9rem;
    color: var(--text-soft);
    font-size: 1rem;
  }

  .plan-card {
    position: relative;
    display: flex;
    flex-direction: column;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 29, 47, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1.6rem;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .plan-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.16);
    box-shadow: 0 22px 44px rgba(0, 0, 0, 0.32);
  }

  .plan-card.featured {
    border-color: rgba(61, 214, 208, 0.45);
    box-shadow: 0 0 0 1px rgba(61, 214, 208, 0.12), 0 22px 48px rgba(0, 0, 0, 0.36);
  }

  .plan-feature {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.68rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.065);
    font-size: 0.9rem;
    color: rgba(234, 244, 255, 0.8);
  }

  .plan-feature:last-child {
    border-bottom: none;
  }

  .level-card {
    position: relative;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.09);
    background: rgba(15, 29, 47, 0.55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.4rem;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .level-card:hover {
    border-color: rgba(61, 214, 208, 0.32);
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.25);
  }

  .level-tag {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.2rem 0.7rem;
    font-size: 0.78rem;
    color: rgba(234, 244, 255, 0.75);
  }

  .badge-status {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    border-radius: 999px;
    padding: 0.16rem 0.65rem;
    font-size: 0.75rem;
  }

  .badge-lock {
    color: rgba(234, 244, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
  }

  .badge-unlock {
    color: #041820;
    background: var(--accent);
    border: 1px solid rgba(61, 214, 208, 0.7);
  }

  .news-card {
    display: flex;
    flex-direction: column;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 29, 47, 0.42);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 1.25rem;
    transition: border-color 0.22s ease, background 0.22s ease, transform 0.22s ease;
  }

  .news-card:hover {
    border-color: rgba(61, 214, 208, 0.35);
    background: rgba(15, 29, 47, 0.7);
    transform: translateY(-2px);
  }

  .news-card .read-more {
    margin-top: auto;
    color: var(--accent);
    font-size: 0.85rem;
  }

  .faq-item {
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.02);
    overflow: hidden;
    transition: border-color 0.28s ease, background 0.28s ease;
  }

  .faq-item.open {
    border-color: rgba(61, 214, 208, 0.35);
    background: rgba(15, 29, 47, 0.7);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    padding: 1.1rem 1.25rem;
    color: var(--text);
    font-size: 0.97rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s ease;
  }

  .faq-question:hover {
    color: #ffffff;
  }

  .faq-question:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    border-radius: 18px;
  }

  .faq-icon {
    position: relative;
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    color: rgba(234, 244, 255, 0.7);
    transition: transform 0.28s ease, border-color 0.28s ease, color 0.28s ease;
  }

  .faq-icon::before,
  .faq-icon::after {
    content: "";
    position: absolute;
    background: currentColor;
    border-radius: 2px;
  }

  .faq-icon::before {
    left: 7px;
    right: 7px;
    top: 50%;
    height: 1px;
    transform: translateY(-50%);
  }

  .faq-icon::after {
    left: 50%;
    top: 7px;
    bottom: 7px;
    width: 1px;
    transform: translateX(-50%);
    transition: opacity 0.15s ease;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    border-color: rgba(61, 214, 208, 0.5);
    color: var(--accent);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .faq-item.open .faq-answer {
    max-height: 360px;
  }

  .faq-answer-inner {
    padding: 0 1.25rem 1.2rem 1.25rem;
    color: var(--text-soft);
    font-size: 0.92rem;
    line-height: 1.8;
  }

  .curl-line {
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent, rgba(61, 214, 208, 0.45), transparent);
  }

  .footer-col-title {
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    color: var(--faint);
  }

  .footer-link {
    display: inline-block;
    color: rgba(234, 244, 255, 0.62);
    font-size: 0.9rem;
    transition: color 0.2s ease;
  }

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

  .cover-shadow {
    box-shadow: 0 24px 55px rgba(0, 0, 0, 0.4);
  }

  .backdrop-soft {
    background: rgba(6, 11, 22, 0.42);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  @media (max-width: 767px) {
    .desktop-nav {
      display: none;
    }
  }

  @media (min-width: 1024px) {
    .mobile-menu-btn {
      display: none;
    }
  }

/* roulang page: article */
:root{
  --portal-bg:#060B16;
  --portal-ink:#0A1526;
  --portal-panel:#0F1D2F;
  --portal-panel-soft:rgba(15,29,47,.6);
  --portal-cyan:#3DD6D0;
  --portal-blue:#2974DA;
  --portal-text:#EAF4FF;
  --portal-mist:#8FA6C3;
  --portal-faint:#5D7290;
  --portal-border:rgba(255,255,255,.1);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-btn:12px;
  --shadow-card:0 12px 30px rgba(0,0,0,.28);
  --shadow-float:0 22px 48px rgba(0,0,0,.42),0 0 0 1px rgba(80,180,220,.1);
  --shadow-glow:0 0 18px rgba(61,214,208,.32);
}

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

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--portal-bg);
  color:var(--portal-text);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}

::selection{background:rgba(61,214,208,.25);color:#fff}
:focus-visible{outline:2px solid var(--portal-cyan);outline-offset:3px;border-radius:6px}

.container-x{
  width:100%;
  max-width:80rem;
  margin-left:auto;
  margin-right:auto;
  padding-left:1rem;
  padding-right:1rem;
}
@media(min-width:640px){
  .container-x{padding-left:1.5rem;padding-right:1.5rem}
}
@media(min-width:1024px){
  .container-x{padding-left:2rem;padding-right:2rem}
}

.bg-grid{
  background-image:
    linear-gradient(rgba(80,140,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,140,255,.05) 1px,transparent 1px);
  background-size:42px 42px;
}

.glass-card{
  background:rgba(15,29,47,.62);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.09);
  box-shadow:var(--shadow-card);
  border-radius:var(--radius-md);
}
.glass-card::before{
  content:"";
  display:block;
  height:1px;
  margin-bottom:-1px;
  border-radius:999px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.09),transparent);
}

.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  height:44px;
  padding:0 1.3rem;
  border-radius:var(--radius-btn);
  background:linear-gradient(135deg,#3DD6D0,#2BB7BD);
  color:#04222a;
  font-weight:700;
  font-size:.95rem;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 18px rgba(61,214,208,.28);
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 26px rgba(61,214,208,.42);
  background:linear-gradient(135deg,#52E8E2,#29C3C9);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 12px rgba(61,214,208,.25);
}

.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  height:44px;
  padding:0 1.2rem;
  border-radius:var(--radius-btn);
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.14);
  color:var(--portal-text);
  font-size:.95rem;
  transition:border-color .25s ease,color .25s ease,background .25s ease,transform .25s ease;
}
.btn-ghost:hover{
  border-color:rgba(61,214,208,.7);
  color:#3DD6D0;
  background:rgba(61,214,208,.06);
  transform:translateY(-1px);
}

.btn-sm-ghost{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  height:36px;
  padding:0 .8rem;
  border-radius:999px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.1);
  color:rgba(234,244,255,.78);
  font-size:.8rem;
  transition:all .25s ease;
}
.btn-sm-ghost:hover{
  border-color:rgba(61,214,208,.7);
  color:#3DD6D0;
  background:rgba(61,214,208,.06);
}

.text-cyanx{color:var(--portal-cyan)}
.text-mist{color:var(--portal-mist)}
.text-faint{color:var(--portal-faint)}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  height:72px;
  background:rgba(6,11,22,.35);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header.scrolled{
  background:rgba(4,8,16,.82);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 10px 30px rgba(0,0,0,.22);
}

.desktop-nav{display:none}
@media(min-width:1024px){
  .desktop-nav{display:flex;align-items:center;gap:1.5rem}
}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  font-size:.95rem;
  letter-spacing:.02em;
  color:rgba(234,244,255,.7);
  padding:.35rem 0;
  transition:color .25s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  width:0;
  height:1px;
  background:var(--portal-cyan);
  transform:translateX(-50%);
  transition:width .3s ease;
}
.nav-link:hover{color:var(--portal-text)}
.nav-link:hover::after{width:70%}
.nav-link.active{color:var(--portal-cyan)}
.nav-link.active::after{
  width:22px;
}

.mobile-menu-btn{display:inline-flex}

.mobile-nav-panel{
  max-height:0;
  overflow:hidden;
  opacity:0;
  transform:translateY(-10px);
  background:rgba(5,10,19,.92);
  backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:max-height .4s ease,opacity .3s ease,transform .3s ease;
}
.mobile-nav-panel.open{
  max-height:420px;
  opacity:1;
  transform:translateY(0);
}

.article-hero{
  position:relative;
  overflow:hidden;
  padding:4rem 0 3.8rem;
  isolation:isolate;
}
.article-hero-img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:-2;
}
.article-hero-overlay{
  position:absolute;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(ellipse at 72% 20%,rgba(61,214,208,.12),transparent 46%),
    radial-gradient(ellipse at 15% 60%,rgba(41,116,218,.14),transparent 42%),
    linear-gradient(180deg,rgba(6,11,22,.76) 0%,rgba(6,11,22,.9) 100%);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-size:.9rem;
  color:var(--portal-faint);
}
.breadcrumb a{
  color:var(--portal-mist);
  transition:color .2s ease;
}
.breadcrumb a:hover{
  color:var(--portal-cyan);
}
.breadcrumb .crumb-current{
  color:var(--portal-text);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  max-width:300px;
}

.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.65rem;
  font-size:.9rem;
  color:var(--portal-mist);
}
.article-meta .dot-sp{
  width:3px;
  height:3px;
  border-radius:50%;
  background:rgba(255,255,255,.22);
}
.article-label-pill{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.28rem .8rem;
  border-radius:999px;
  font-size:.8rem;
  color:var(--portal-cyan);
  background:rgba(61,214,208,.1);
  border:1px solid rgba(61,214,208,.18);
}

.article-cms-body{
  font-size:1.06rem;
  line-height:1.85;
  color:rgba(234,244,255,.92);
  word-break:break-word;
}
.article-cms-body > p{
  margin:0 0 1.6rem;
}
.article-cms-body h1,
.article-cms-body h2{
  font-size:1.6rem;
  line-height:1.4;
  margin:2.2rem 0 1rem;
  font-weight:800;
  color:var(--portal-text);
  letter-spacing:-.01em;
}
.article-cms-body h3{
  font-size:1.22rem;
  font-weight:700;
  margin:1.8rem 0 .8rem;
  color:var(--portal-text);
}
.article-cms-body h4{
  font-size:1.08rem;
  font-weight:600;
  margin:1.6rem 0 .6rem;
}
.article-cms-body ul,
.article-cms-body ol{
  margin:0 0 1.6rem;
  padding-left:1.4rem;
}
.article-cms-body ul li,
.article-cms-body ol li{
  margin-bottom:.5rem;
}
.article-cms-body ul li::marker{
  color:var(--portal-cyan);
}
.article-cms-body blockquote{
  margin:2rem 0;
  padding:1.1rem 1.4rem;
  border-left:2px solid rgba(61,214,208,.6);
  background:rgba(61,214,208,.06);
  color:rgba(234,244,255,.78);
  border-radius:0 12px 12px 0;
}
.article-cms-body img{
  border-radius:18px;
  margin:1.8rem 0;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow-card);
}
.article-cms-body a{
  color:var(--portal-cyan);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:rgba(61,214,208,.3);
  transition:text-decoration-color .2s ease;
}
.article-cms-body a:hover{
  text-decoration-color:rgba(61,214,208,.9);
}
.article-cms-body strong{
  color:var(--portal-text);
  font-weight:700;
}
.article-cms-body iframe{
  max-width:100%;
  border-radius:14px;
}

.article-end{
  border-top:1px solid rgba(255,255,255,.07);
  margin-top:2.4rem;
  padding-top:1.4rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}

.tag-pill{
  display:inline-flex;
  align-items:center;
  padding:.35rem .9rem;
  font-size:.82rem;
  color:rgba(234,244,255,.72);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-radius:999px;
  transition:all .2s ease;
}
.tag-pill:hover{
  color:var(--portal-cyan);
  border-color:rgba(61,214,208,.45);
  background:rgba(61,214,208,.07);
}

.related-card{
  position:relative;
  height:100%;
  border-radius:var(--radius-md);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.09);
  background:rgba(13,25,42,.8);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.related-card:hover{
  transform:translateY(-5px);
  border-color:rgba(61,214,208,.35);
  box-shadow:var(--shadow-float);
}
.related-card-img{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:#0A1526;
}
.related-card-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease,opacity .3s ease;
}
.related-card:hover .related-card-img img{
  transform:scale(1.04);
}
.related-card-body{
  padding:1.15rem 1.2rem 1.3rem;
}
.related-card-title{
  font-weight:700;
  font-size:1.05rem;
  color:var(--portal-text);
  line-height:1.45;
  transition:color .2s ease;
}
.related-card:hover .related-card-title{
  color:var(--portal-cyan);
}
.section-caption{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  font-size:.88rem;
  color:var(--portal-cyan);
  letter-spacing:.04em;
}
.section-caption::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--portal-cyan);
  box-shadow:0 0 12px rgba(61,214,208,.65);
}

.empty-state{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:5.5rem 1rem;
  text-align:center;
}
.empty-state-icon{
  display:flex;
  width:64px;
  height:64px;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  color:var(--portal-faint);
  margin-bottom:1.2rem;
}

.cta-zone{
  position:relative;
  overflow:hidden;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.12);
  background:
    radial-gradient(circle at 84% 0%,rgba(61,214,208,.18),transparent 38%),
    radial-gradient(circle at 6% 100%,rgba(41,116,218,.2),transparent 46%),
    rgba(11,22,38,.86);
  backdrop-filter:blur(12px);
}
.cta-glow{
  position:absolute;
  top:-44%;
  left:50%;
  width:360px;
  height:360px;
  transform:translateX(-50%);
  background:radial-gradient(circle,rgba(61,214,208,.19),transparent 70%);
  pointer-events:none;
  filter:blur(24px);
}

.footer-col-title{
  color:var(--portal-text);
  font-size:.95rem;
  font-weight:600;
}
.footer-link{
  display:inline-flex;
  color:var(--portal-mist);
  font-size:.88rem;
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{
  color:var(--portal-cyan);
  transform:translateX(3px);
}

.scroll-line{
  display:inline-flex;
  width:14px;
  height:5px;
  border-top:2px solid transparent;
  border-left:1px solid rgba(255,255,255,.3);
}

@media(max-width:1023px){
  .mobile-nav-panel{
    padding:0 1rem;
  }
  .mobile-nav-panel.open{
    padding:1rem;
  }
  .mobile-nav-panel .nav-link{
    display:block;
    padding:.7rem .4rem;
    font-size:1.05rem;
    color:rgba(234,244,255,.8);
  }
  .mobile-nav-panel .nav-link::after{
    display:none;
  }
  .mobile-nav-panel .nav-link:hover{
    color:#fff;
  }
}

@media(max-width:640px){
  .article-cms-body{
    font-size:.98rem;
  }
  .article-cms-body h1,
  .article-cms-body h2{
    font-size:1.35rem;
  }
  .breadcrumb .crumb-current{
    max-width:180px;
  }
}

@media(prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category1 */
:root {
    --portal-bg: #060B16;
    --portal-bg2: #0A1526;
    --portal-surface: rgba(15, 29, 47, 0.62);
    --portal-glass: rgba(15, 29, 47, 0.55);
    --portal-line: rgba(255, 255, 255, 0.08);
    --portal-cyan: #3DD6D0;
    --portal-blue: #2974DA;
    --portal-text: #EAF4FF;
    --portal-muted: #8FA6C3;
    --portal-faint: #5D7290;
    --portal-glow: 0 0 18px rgba(61, 214, 208, 0.32);
    --portal-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
    --portal-shadow-lg: 0 22px 48px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(80, 180, 220, 0.1);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
  }

  body {
    margin: 0;
    background-color: var(--portal-bg);
    background-image: radial-gradient(circle at 12% 10%, rgba(41, 116, 218, 0.16), transparent 36%),
      radial-gradient(circle at 88% 38%, rgba(61, 214, 208, 0.09), transparent 26%);
    background-attachment: fixed;
    color: var(--portal-text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    padding-top: 72px;
    -webkit-font-smoothing: antialiased;
  }

  .skip-link {
    position: fixed;
    left: 18px;
    top: -60px;
    z-index: 100;
    padding: 8px 16px;
    border-radius: 10px;
    background: #0A1526;
    color: #fff;
    font-size: 14px;
    transition: top 0.22s ease;
  }

  .skip-link:focus {
    top: 18px;
    outline: 2px solid var(--portal-cyan);
  }

  a {
    color: var(--portal-text);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  a:hover {
    color: var(--portal-cyan);
  }

  button {
    font-family: inherit;
  }

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

  .container-x {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  @media (min-width: 640px) {
    .container-x {
      padding-left: 28px;
      padding-right: 28px;
    }
  }

  @media (min-width: 1024px) {
    .container-x {
      padding-left: 36px;
      padding-right: 36px;
    }
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 90;
    background: rgba(6, 11, 22, 0.5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .site-header.is-scrolled {
    background: rgba(5, 9, 17, 0.84);
    border-bottom-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.28);
  }

  .desktop-nav .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--portal-muted);
    letter-spacing: 0.04em;
    padding: 8px 2px;
    transition: color 0.2s ease;
  }

  .desktop-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -2px;
    width: 0;
    height: 1px;
    background: var(--portal-cyan);
    transform: translateX(-50%);
    transition: width 0.22s ease;
  }

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

  .desktop-nav .nav-link:hover::after {
    width: 24px;
  }

  .desktop-nav .nav-link.active {
    color: #fff;
  }

  .desktop-nav .nav-link.active::after {
    width: 22px;
    background: var(--portal-cyan);
    box-shadow: 0 0 8px rgba(61, 214, 208, 0.5);
  }

  .mobile-nav-wrap {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 85;
    max-height: 0;
    overflow: hidden;
    background: rgba(5, 9, 17, 0.94);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(22px);
    transition: max-height 0.32s ease, border-color 0.28s ease;
  }

  .mobile-nav-wrap.open {
    max-height: 440px;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }

  .mnav-link {
    display: block;
    padding: 13px 4px;
    color: var(--portal-muted);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .mnav-link:active,
  .mnav-link.active {
    color: #fff;
    padding-left: 12px;
  }

  .mnav-link:last-child {
    border-bottom: 0;
  }

  .btn-sm-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 38px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(234, 244, 255, 0.8);
    font-size: 13px;
    font-weight: 500;
    line-height: 38px;
    transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.2s ease;
  }

  .btn-sm-ghost:hover {
    background: rgba(61, 214, 208, 0.1);
    border-color: rgba(61, 214, 208, 0.35);
    color: var(--portal-cyan);
  }

  .btn-sm-ghost:focus-visible,
  .mnav-link:focus-visible,
  .nav-link:focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: 4px;
    border-radius: 6px;
  }

  .btn-primary,
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 22px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    white-space: nowrap;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  }

  .btn-primary {
    background: linear-gradient(135deg, #3DD6D0, #26BFC9);
    color: #04221f;
    box-shadow: 0 0 18px rgba(61, 214, 208, 0.28);
  }

  .btn-primary:hover {
    color: #04221f;
    box-shadow: 0 0 28px rgba(61, 214, 208, 0.44);
    transform: translateY(-1px);
  }

  .btn-primary:focus-visible,
  .btn-ghost:focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: 3px;
  }

  .btn-ghost {
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.04);
    color: var(--portal-text);
  }

  .btn-ghost:hover {
    border-color: rgba(61, 214, 208, 0.4);
    background: rgba(61, 214, 208, 0.08);
    color: #fff;
    transform: translateY(-1px);
  }

  .section-pad {
    padding-top: 80px;
    padding-bottom: 80px;
  }

  @media (max-width: 767px) {
    .section-pad {
      padding-top: 56px;
      padding-bottom: 56px;
    }
  }

  .kicker-mark {
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--portal-cyan);
    box-shadow: 0 0 10px rgba(61, 214, 208, 0.5);
    vertical-align: middle;
  }

  .section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--portal-cyan);
  }

  .text-mist {
    color: var(--portal-muted);
  }

  .text-faint {
    color: var(--portal-faint);
  }

  .glass-panel {
    background: var(--portal-glass);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: var(--portal-shadow);
  }

  .glass-panel-soft {
    background: rgba(15, 29, 47, 0.38);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .img-shell {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    background: rgba(15, 29, 47, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  .img-shell::before {
    content: "";
    display: block;
    padding-bottom: 78%;
  }

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

  .img-shell.is-error::after {
    content: "图片资源即将更新";
    position: absolute;
    right: 10px;
    bottom: 10px;
    z-index: 2;
    font-size: 11px;
    color: var(--portal-faint);
    background: rgba(6, 11, 22, 0.74);
    padding: 4px 9px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.06);
  }

  .img-shell.is-error img {
    visibility: hidden;
  }

  .step-area {
    position: relative;
  }

  .step-item {
    position: relative;
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 18px;
    padding-bottom: 30px;
  }

  .step-item:last-child {
    padding-bottom: 0;
  }

  .step-item:not(:last-child)::before {
    content: "";
    position: absolute;
    top: 58px;
    left: 23px;
    width: 1px;
    height: calc(100% - 38px);
    background: linear-gradient(180deg, rgba(61, 214, 208, 0.42), rgba(61, 214, 208, 0.06));
  }

  .step-num {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    border: 1px solid rgba(61, 214, 208, 0.22);
    background: rgba(15, 29, 47, 0.7);
    color: var(--portal-cyan);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.04em;
    box-shadow: 0 0 14px rgba(61, 214, 208, 0.1);
  }

  .check-row {
    position: relative;
    padding: 18px 20px 18px 64px;
    border-radius: 18px;
    background: rgba(15, 29, 47, 0.44);
    border: 1px solid rgba(255, 255, 255, 0.06);
    overflow: hidden;
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.22s ease;
  }

  .check-row:hover {
    border-color: rgba(61, 214, 208, 0.24);
    background: rgba(15, 29, 47, 0.6);
    transform: translateY(-1px);
  }

  .check-row-icon {
    position: absolute;
    left: 18px;
    top: 20px;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid rgba(61, 214, 208, 0.18);
    background: rgba(61, 214, 208, 0.08);
    color: var(--portal-cyan);
  }

  .check-row strong {
    display: block;
    color: var(--portal-text);
    font-weight: 600;
    font-size: 16px;
  }

  .check-row p {
    margin: 4px 0 0;
    color: var(--portal-muted);
    font-size: 14px;
    line-height: 1.75;
  }

  .role-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 20px 22px;
    border-radius: 18px;
    background: rgba(15, 29, 47, 0.42);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.22s ease;
  }

  .role-row:hover {
    transform: translateY(-2px);
    border-color: rgba(61, 214, 208, 0.2);
    background: rgba(15, 29, 47, 0.58);
  }

  .role-row .role-tag {
    display: inline-flex;
    width: max-content;
    align-items: center;
    gap: 7px;
    color: var(--portal-cyan);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
  }

  .role-row h3 {
    margin: 6px 0 0;
    font-size: 17px;
    line-height: 1.5;
    color: var(--portal-text);
    font-weight: 600;
  }

  .role-row p {
    margin: 6px 0 0;
    color: var(--portal-muted);
    font-size: 14px;
    line-height: 1.8;
  }

  .role-row .start-line {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed rgba(255, 255, 255, 0.08);
    color: var(--portal-faint);
    font-size: 13px;
  }

  .faq-item {
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 29, 47, 0.4);
    border-radius: 18px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: border-color 0.25s ease, background 0.25s ease;
  }

  .faq-item.open {
    background: rgba(15, 29, 47, 0.68);
    border-color: rgba(61, 214, 208, 0.26);
  }

  .faq-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: transparent;
    border: 0;
    padding: 18px 20px;
    text-align: left;
    cursor: pointer;
    color: var(--portal-text);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.6;
  }

  .faq-header:focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: -2px;
    border-radius: 14px;
  }

  .faq-icon {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.03);
    color: var(--portal-cyan);
    transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    border-color: rgba(61, 214, 208, 0.3);
    background: rgba(61, 214, 208, 0.1);
  }

  .faq-body {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.36s ease, opacity 0.3s ease;
  }

  .faq-body-inner {
    padding: 0 20px 20px;
    color: var(--portal-muted);
    font-size: 14px;
    line-height: 1.9;
  }

  .faq-item.open .faq-body {
    max-height: 420px;
    opacity: 1;
  }

  .hero-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(80, 140, 255, 0.06) 1px, transparent 1px),
      linear-gradient(90deg, rgba(80, 140, 255, 0.06) 1px, transparent 1px);
    background-size: 56px 56px;
    pointer-events: none;
  }

  .hero-body-card {
    position: relative;
  }

  .footer-col-title {
    font-size: 13px;
    font-weight: 700;
    color: rgba(234, 244, 255, 0.5);
    letter-spacing: 0.14em;
  }

  .footer-link {
    display: inline-block;
    color: var(--portal-muted);
    font-size: 14px;
    line-height: 1.6;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-link:hover {
    color: var(--portal-cyan);
    padding-left: 4px;
  }

  .scroll-guide {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--portal-faint);
    font-size: 12px;
    letter-spacing: 0.2em;
  }

  .scroll-guide svg {
    width: 18px;
    height: 18px;
  }

  .backdrop-light {
    background: rgba(255, 255, 255, 0.02);
  }

  .line-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(234, 244, 255, 0.12), transparent);
  }

  @media (max-width: 767px) {
    .step-item:not(:last-child)::before {
      left: 21px;
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 14px;
    }

    .step-item {
      grid-template-columns: 44px 1fr;
      gap: 14px;
    }

    .faq-header {
      font-size: 14px;
      padding: 16px;
    }

    .faq-body-inner {
      padding: 0 16px 16px;
    }
  }

/* roulang page: category2 */
:root {
    --portal-bg: #060B16;
    --portal-bg-deep: #040810;
    --portal-bg-soft: #0A1526;
    --portal-surface: rgba(15, 29, 47, 0.62);
    --portal-surface-strong: rgba(15, 29, 47, 0.78);
    --portal-cyan: #3DD6D0;
    --portal-blue: #2974DA;
    --portal-text: #EAF4FF;
    --portal-mist: #8FA6C3;
    --portal-faint: #5D7290;
    --portal-border: rgba(255, 255, 255, 0.09);
    --portal-success: #20C997;
    --portal-warn: #E8B658;
    --portal-error: #E27070;
    --radius-card: 16px;
    --radius-large: 24px;
    --shadow-default: 0 12px 30px rgba(0, 0, 0, 0.28);
    --shadow-hover: 0 22px 48px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(80, 180, 220, 0.1);
    --glow-cyan: 0 0 18px rgba(61, 214, 208, 0.32);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--portal-bg);
    color: var(--portal-text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
      radial-gradient(1200px 600px at 12% -10%, rgba(41, 116, 218, 0.22), transparent 60%),
      radial-gradient(900px 520px at 90% 14%, rgba(61, 214, 208, 0.12), transparent 55%),
      linear-gradient(180deg, #0A1526 0%, #060B16 42%, #040810 100%);
  }

  body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.35;
    background-image:
      linear-gradient(rgba(80, 140, 255, 0.06) 1px, transparent 1px),
      linear-gradient(90deg, rgba(80, 140, 255, 0.06) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(circle at 20% 4%, #000 0%, transparent 75%);
  }

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

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

  button,
  input,
  textarea {
    font: inherit;
  }

  .container-x {
    width: 100%;
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

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

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

  .text-cyanx {
    color: var(--portal-cyan);
  }

  .text-mist {
    color: var(--portal-mist);
  }

  .text-faint {
    color: var(--portal-faint);
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 60;
    border-bottom: 1px solid transparent;
    transition: border-color 0.35s ease, background-color 0.35s ease, box-shadow 0.35s ease;
  }

  .site-header.is-scrolled {
    background: rgba(6, 11, 22, 0.82);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  }

  .desktop-nav {
    display: none;
    align-items: center;
    gap: 2rem;
  }

  @media (min-width: 1024px) {
    .desktop-nav {
      display: flex;
    }
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: 14px;
    line-height: 1;
    letter-spacing: 0.04em;
    color: rgba(234, 244, 255, 0.78);
    padding: 0.5625rem 0;
    transition: color 0.25s ease;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    height: 2px;
    border-radius: 999px;
    background: var(--portal-cyan);
    box-shadow: 0 0 8px rgba(61, 214, 208, 0.7);
    transition: left 0.25s ease, right 0.25s ease, opacity 0.25s ease;
    opacity: 0;
  }

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

  .nav-link:hover::after {
    left: 6%;
    right: 6%;
    opacity: 0.6;
  }

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

  .nav-link.active::after {
    left: 10%;
    right: 10%;
    opacity: 1;
  }

  .btn-sm-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    height: 36px;
    padding: 0 0.875rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(234, 244, 255, 0.86);
    font-size: 13px;
    letter-spacing: 0.02em;
    transition: border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
  }

  .btn-sm-ghost:hover {
    border-color: rgba(61, 214, 208, 0.55);
    background: rgba(61, 214, 208, 0.08);
    color: #ffffff;
    box-shadow: 0 0 12px rgba(61, 214, 208, 0.14);
  }

  .mobile-nav {
    display: block;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 59;
    padding: 1.25rem 1rem 1.5rem;
    background: rgba(6, 11, 22, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .mobile-nav.hidden {
    display: none;
  }

  @media (min-width: 1024px) {
    .mobile-nav {
      display: none !important;
    }
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 0.75rem;
    border-radius: 12px;
    color: var(--portal-mist);
    font-size: 15px;
    transition: background-color 0.25s ease, color 0.25s ease;
  }

  .mobile-nav a.active,
  .mobile-nav a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
  }

  .glass-card {
    background: rgba(15, 29, 47, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 16px;
    box-shadow: var(--shadow-default);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  .glass-card.inset {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.08),
      0 12px 30px rgba(0, 0, 0, 0.28);
  }

  .badge-dot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.75rem;
    height: 1.75rem;
    padding: 0 0.625rem;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    background: rgba(61, 214, 208, 0.1);
    color: var(--portal-cyan);
    border: 1px solid rgba(61, 214, 208, 0.24);
  }

  .line-label {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--portal-cyan);
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .line-label::before {
    content: "";
    width: 28px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--portal-cyan));
  }

  /* 主按钮 */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    height: 46px;
    padding: 0 1.25rem;
    border-radius: 12px;
    background: linear-gradient(135deg, #3DD6D0, #2CB8B4);
    color: #04161c;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.02em;
    box-shadow: 0 0 18px rgba(61, 214, 208, 0.32);
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 26px rgba(61, 214, 208, 0.46);
    filter: brightness(1.05);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 12px rgba(61, 214, 208, 0.25);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    height: 46px;
    padding: 0 1.25rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(15, 29, 47, 0.4);
    color: rgba(234, 244, 255, 0.9);
    font-size: 15px;
    letter-spacing: 0.02em;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  }

  .btn-ghost:hover {
    border-color: rgba(61, 214, 208, 0.6);
    color: #ffffff;
    background: rgba(61, 214, 208, 0.08);
    box-shadow: 0 0 16px rgba(61, 214, 208, 0.16);
  }

  :focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: 4px;
    border-radius: 6px;
  }

  .section-title {
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 0.75rem;
    font-size: clamp(1.6rem, 2.6vw, 2.4rem);
    line-height: 1.3;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--portal-text);
    margin-bottom: 1rem;
  }

  .section-title::before {
    content: "";
    width: 4px;
    height: 0.85em;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--portal-cyan), var(--portal-blue));
    transform: translateY(0.1em);
  }

  .section-desc {
    max-width: 46rem;
    color: var(--portal-mist);
    font-size: 1rem;
    line-height: 1.85;
  }

  .footer-col-title {
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(234, 244, 255, 0.46);
  }

  .footer-link {
    display: inline-flex;
    width: fit-content;
    font-size: 14px;
    color: var(--portal-mist);
    transition: color 0.25s ease, transform 0.25s ease;
  }

  .footer-link::before {
    content: "·";
    margin-right: 0.4rem;
    color: rgba(61, 214, 208, 0.55);
  }

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

  /* 步骤时间线 */
  .timeline-wrap {
    position: relative;
  }

  .timeline-wrap::before {
    content: "";
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--portal-cyan) 8%, rgba(61, 214, 208, 0.34) 80%, transparent);
  }

  @media (min-width: 768px) {
    .timeline-wrap::before {
      left: 50%;
      transform: translateX(-50%);
    }
  }

  .timeline-item {
    position: relative;
    padding-left: 2.75rem;
    margin-bottom: 2.25rem;
  }

  @media (min-width: 768px) {
    .timeline-item {
      padding-left: 0;
      margin-bottom: 0;
    }
  }

  .timeline-dot {
    position: absolute;
    left: 10px;
    top: 4px;
    width: 18px;
    height: 18px;
    border-radius: 999px;
    border: 2px solid var(--portal-cyan);
    background: #0b1625;
    box-shadow: 0 0 0 5px rgba(61, 214, 208, 0.1), 0 0 12px rgba(61, 214, 208, 0.35);
    z-index: 2;
  }

  @media (min-width: 768px) {
    .timeline-dot {
      left: 50%;
      top: 12px;
      transform: translateX(-50%);
    }
  }

  @media (min-width: 768px) {
    .timeline-card-col {
      width: 50%;
    }

    .timeline-item:nth-child(odd) .timeline-card-col {
      padding-right: 3rem;
    }

    .timeline-item:nth-child(even) .timeline-card-col {
      margin-left: 50%;
      padding-left: 3rem;
    }
  }

  .step-card {
    background: rgba(15, 29, 47, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-default);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .step-card:hover {
    transform: translateY(-2px);
    border-color: rgba(61, 214, 208, 0.25);
    box-shadow: var(--shadow-hover);
  }

  .faq-item {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    background: rgba(15, 29, 47, 0.3);
    transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
  }

  .faq-item[open] {
    background: rgba(15, 29, 47, 0.6);
    border-color: rgba(61, 214, 208, 0.24);
    box-shadow: var(--shadow-default);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.125rem 1.25rem;
    font-weight: 600;
    color: var(--portal-text);
    font-size: 15px;
  }

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

  .faq-item summary::after {
    content: "+";
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex: 0 0 28px;
    border-radius: 999px;
    font-size: 20px;
    line-height: 1;
    color: var(--portal-cyan);
    background: rgba(61, 214, 208, 0.08);
    border: 1px solid rgba(61, 214, 208, 0.2);
    transition: transform 0.3s ease, background-color 0.3s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    background: rgba(61, 214, 208, 0.16);
  }

  .faq-answer {
    padding: 0 1.25rem 1.25rem;
    color: var(--portal-mist);
    line-height: 1.85;
    font-size: 14px;
    max-width: 52rem;
  }

  .ico-check {
    color: var(--portal-success);
  }

  .ico-minus {
    color: rgba(93, 114, 144, 0.88);
  }

  .cover-safe {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(15, 29, 47, 0.55);
  }

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

  .image-fallback-note {
    position: absolute;
    right: 8px;
    bottom: 8px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    color: var(--portal-faint);
    background: rgba(4, 8, 16, 0.54);
    opacity: 0;
    transition: opacity 0.2s ease;
  }

  .cover-safe:hover .image-fallback-note {
    opacity: 1;
  }

  @media (max-width: 768px) {
    .hero-row {
      flex-direction: column;
    }
  }

/* roulang page: category3 */
:root {
        --portal-base: #060B16;
        --portal-deep: #040810;
        --portal-surface: #0F1D2F;
        --portal-glass: rgba(15, 29, 47, 0.55);
        --portal-cyan: #3DD6D0;
        --portal-cyan-rgb: 61, 214, 208;
        --portal-blue: #2974DA;
        --portal-white: #EAF4FF;
        --portal-mist: #8FA6C3;
        --portal-faint: #5D7290;
        --portal-line: rgba(255, 255, 255, 0.08);
        --portal-line-bright: rgba(61, 214, 208, 0.35);
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 12px;
        --radius-pill: 999px;
        --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.28);
        --shadow-float: 0 22px 48px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(80, 180, 220, 0.1);
        --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        font-family: var(--font-sans);
        background: var(--portal-base);
        background-image: radial-gradient(circle at 78% 10%, rgba(41, 116, 218, 0.08), transparent 34%), radial-gradient(circle at 12% 42%, rgba(61, 214, 208, 0.06), transparent 28%);
        color: var(--portal-white);
        line-height: 1.75;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }

    body::before {
        content: "";
        position: fixed;
        inset: 0;
        z-index: -1;
        pointer-events: none;
        background-image: linear-gradient(rgba(80, 140, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(80, 140, 255, 0.035) 1px, transparent 1px);
        background-size: 64px 64px;
        mask-image: linear-gradient(to bottom, black, transparent 80%);
    }

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

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

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

    :focus-visible {
        outline: 2px solid var(--portal-cyan);
        outline-offset: 3px;
        border-radius: 6px;
    }

    ::selection {
        background: rgba(61, 214, 208, 0.25);
        color: #fff;
    }

    .container-x {
        width: 100%;
        max-width: 80rem;
        margin-inline: auto;
        padding-inline: 1.25rem;
    }

    @media (min-width: 640px) {
        .container-x {
            padding-inline: 2rem;
        }
    }

    @media (min-width: 1024px) {
        .container-x {
            padding-inline: 2.5rem;
        }
    }

    .text-cyanx {
        color: var(--portal-cyan);
    }
    .text-cyanx\/80 {
        color: rgba(61, 214, 208, 0.8);
    }
    .text-mist {
        color: var(--portal-mist);
    }
    .text-faint {
        color: var(--portal-faint);
    }
    .bg-cyanx {
        background-color: var(--portal-cyan);
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 80;
        width: 100%;
        background: rgba(6, 11, 22, 0.56);
        -webkit-backdrop-filter: blur(16px);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid transparent;
        transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    }

    .site-header.scrolled {
        background: rgba(5, 10, 20, 0.86);
        border-bottom-color: rgba(255, 255, 255, 0.08);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
    }

    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        font-size: 0.94rem;
        letter-spacing: 0.02em;
        color: var(--portal-mist);
        padding: 0.45rem 0.1rem;
        transition: color 0.25s ease;
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 0;
        width: 0;
        height: 1px;
        background: var(--portal-cyan);
        transform: translateX(-50%);
        transition: width 0.3s ease;
    }

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

    .nav-link:hover::after {
        width: 26px;
    }

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

    .nav-link.active::after {
        width: 28px;
        box-shadow: 0 0 12px rgba(61, 214, 208, 0.7);
    }

    .btn-sm-ghost {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
        height: 36px;
        padding: 0 0.9rem;
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(255, 255, 255, 0.03);
        color: var(--portal-mist);
        font-size: 0.84rem;
        letter-spacing: 0.02em;
        transition: all 0.25s ease;
    }

    .btn-sm-ghost:hover {
        color: #fff;
        border-color: rgba(61, 214, 208, 0.35);
        background: rgba(61, 214, 208, 0.08);
    }

    .mobile-menu-btn {
        transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
    }

    .mobile-menu-btn:hover {
        border-color: rgba(61, 214, 208, 0.3);
        color: #fff;
    }

    .mobile-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        padding: 1rem 1.25rem 1.5rem;
        background: rgba(4, 8, 16, 0.97);
        -webkit-backdrop-filter: blur(18px);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    }

    .mobile-menu.is-open {
        display: block;
    }

    .mobile-menu a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.85rem 0.5rem;
        border-radius: 12px;
        font-size: 1rem;
        color: var(--portal-mist);
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        transition: all 0.25s ease;
    }

    .mobile-menu a:last-child {
        border-bottom-color: transparent;
    }

    .mobile-menu a:hover,
    .mobile-menu a.active {
        color: #fff;
        background: rgba(61, 214, 208, 0.05);
        padding-left: 0.9rem;
    }

    .mobile-menu a.active {
        color: var(--portal-cyan);
    }

    .page-banner {
        position: relative;
        display: flex;
        align-items: center;
        min-height: 520px;
        padding: 7.5rem 0 4.5rem;
        overflow: hidden;
        isolation: isolate;
    }

    .page-banner-bg {
        position: absolute;
        inset: 0;
        z-index: -2;
        background-image: linear-gradient(to bottom, rgba(6, 11, 22, 0.1), var(--portal-base) 86%), linear-gradient(90deg, rgba(5, 10, 20, 0.7), rgba(5, 10, 20, 0.18)), url('/assets/images/backpic/back-1.webp');
        background-position: center center;
        background-size: cover;
        background-repeat: no-repeat;
    }

    .page-banner-glow {
        position: absolute;
        left: -12%;
        bottom: -40%;
        width: 64%;
        height: 80%;
        z-index: -1;
        background: radial-gradient(circle, rgba(61, 214, 208, 0.12), transparent 70%);
        pointer-events: none;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 0.75rem;
        color: var(--portal-cyan);
        font-size: 0.8rem;
        letter-spacing: 0.32em;
        text-transform: uppercase;
        margin-bottom: 1.1rem;
    }

    .eyebrow::before {
        content: "";
        display: block;
        width: 30px;
        height: 1px;
        background: var(--portal-cyan);
        box-shadow: 0 0 12px rgba(61, 214, 208, 0.6);
    }

    .page-banner h1 {
        max-width: 760px;
        margin: 0;
        font-size: clamp(2.4rem, 6vw, 4.4rem);
        font-weight: 780;
        line-height: 1.1;
        letter-spacing: -0.03em;
    }

    .banner-lead {
        max-width: 580px;
        margin-top: 1.5rem;
        color: var(--portal-mist);
        font-size: 1.05rem;
        line-height: 1.9;
    }

    .banner-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 0.9rem;
        margin-top: 2.2rem;
    }

    .btn-primary,
    .btn-ghost {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        min-height: 44px;
        padding: 0 1.5rem;
        border-radius: 12px;
        font-size: 0.94rem;
        font-weight: 600;
        letter-spacing: 0.02em;
        transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
    }

    .btn-primary {
        background: var(--portal-cyan);
        color: #04222a;
        box-shadow: 0 0 18px rgba(61, 214, 208, 0.3);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 30px rgba(61, 214, 208, 0.5), 0 14px 24px rgba(0, 0, 0, 0.24);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 0 14px rgba(61, 214, 208, 0.2);
    }

    .btn-ghost {
        border: 1px solid rgba(255, 255, 255, 0.12);
        background: rgba(255, 255, 255, 0.03);
        color: var(--portal-white);
    }

    .btn-ghost:hover {
        border-color: rgba(61, 214, 208, 0.48);
        background: rgba(61, 214, 208, 0.08);
        color: #fff;
        transform: translateY(-2px);
    }

    .section-spacing {
        padding: 4.8rem 0;
        position: relative;
    }

    @media (min-width: 768px) {
        .section-spacing {
            padding: 6rem 0;
        }
    }

    .section-heading {
        max-width: 760px;
        margin-bottom: 3rem;
    }

    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 0.65rem;
        color: var(--portal-cyan);
        font-size: 0.86rem;
        letter-spacing: 0.14em;
        font-weight: 500;
        margin-bottom: 0.6rem;
    }

    .section-label::before {
        content: "";
        display: block;
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--portal-cyan);
        box-shadow: 0 0 12px rgba(61, 214, 208, 0.5);
    }

    .section-heading h2 {
        margin: 0;
        font-size: clamp(1.7rem, 3vw, 2.6rem);
        line-height: 1.25;
        letter-spacing: -0.02em;
        font-weight: 720;
    }

    .section-heading .section-sub {
        max-width: 640px;
        margin-top: 0.9rem;
        color: var(--portal-mist);
        font-size: 1rem;
        line-height: 1.85;
    }

    .split-row {
        display: flex;
        align-items: center;
        gap: clamp(2rem, 5vw, 5rem);
        padding: 2.6rem 0;
    }

    .split-txt {
        flex: 1.15 1 300px;
    }

    .split-media {
        flex: 1 1 260px;
        margin-top: 1.5rem;
    }

    .split-reverse .split-media {
        order: -1;
    }

    @media (max-width: 1024px) {
        .split-row {
            flex-direction: column;
            align-items: stretch;
            padding: 1.4rem 0;
        }
        .split-media,
        .split-reverse .split-media {
            order: 0;
            margin-top: 0.75rem;
        }
    }

    .split-txt h3 {
        margin: 0 0 0.5rem;
        font-size: 1.5rem;
        line-height: 1.4;
    }

    .split-txt .lead-line {
        color: var(--portal-mist);
        margin: 0.5rem 0 1.2rem;
        font-size: 1rem;
        line-height: 1.9;
    }

    .feature-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: grid;
        gap: 1rem;
    }

    .feature-list li {
        display: flex;
        align-items: flex-start;
        gap: 0.85rem;
        font-size: 0.98rem;
        color: var(--portal-mist);
    }

    .feature-list svg {
        flex: 0 0 auto;
        width: 20px;
        height: 20px;
        color: var(--portal-cyan);
        margin-top: 3px;
    }

    .figure-media {
        position: relative;
        margin: 0;
        border-radius: 22px;
        padding: 0.5rem;
        background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: var(--shadow-card);
    }

    .figure-media img {
        width: 100%;
        height: auto;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        border-radius: 18px;
        background: #0e1c2d;
    }

    .figure-media figcaption {
        padding: 0.8rem 0.5rem 0.4rem;
        text-align: center;
        font-size: 0.8rem;
        letter-spacing: 0.08em;
        color: var(--portal-faint);
    }

    .asset-grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 1.25rem;
    }

    .asset-item {
        grid-column: span 6;
        display: flex;
        gap: 1rem;
        align-items: flex-start;
        border-radius: 18px;
        padding: 1.4rem 1.5rem;
        background: rgba(15, 29, 47, 0.62);
        border: 1px solid rgba(255, 255, 255, 0.07);
        -webkit-backdrop-filter: blur(12px);
        backdrop-filter: blur(12px);
        box-shadow: var(--shadow-card);
        transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
    }

    .asset-item:nth-child(even) {
        transform: translateY(14px);
    }

    .asset-item:hover {
        background: rgba(20, 38, 60, 0.72);
        border-color: rgba(61, 214, 208, 0.22);
    }

    .asset-icon {
        flex: 0 0 auto;
        width: 42px;
        height: 42px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 14px;
        background: rgba(61, 214, 208, 0.1);
        border: 1px solid rgba(61, 214, 208, 0.16);
        color: var(--portal-cyan);
    }

    .asset-copy {
        min-width: 0;
    }

    .asset-copy p {
        margin: 0 0 0.2rem;
        color: rgba(255, 255, 255, 0.42);
        font-size: 0.78rem;
        letter-spacing: 0.12em;
    }

    .asset-copy strong {
        display: block;
        font-size: 1.06rem;
        font-weight: 640;
        color: var(--portal-white);
    }

    .asset-copy span {
        display: block;
        margin-top: 0.2rem;
        font-size: 0.89rem;
        color: var(--portal-mist);
        line-height: 1.6;
    }

    @media (max-width: 768px) {
        .asset-grid {
            grid-template-columns: 1fr;
        }
        .asset-item,
        .asset-item:nth-child(even) {
            grid-column: auto;
            transform: none;
        }
    }

    .step-list {
        list-style: none;
        margin: 0;
        padding: 0;
        display: grid;
        gap: 1.35rem;
        counter-reset: step;
    }

    .step-list li {
        display: flex;
        gap: 1rem;
        position: relative;
        padding-left: 0.2rem;
    }

    .step-list li + li {
        margin-top: 0.4rem;
    }

    .step-marker {
        flex: 0 0 auto;
        width: 40px;
        height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        font-size: 0.92rem;
        font-weight: 700;
        color: #06282e;
        background: rgba(61, 214, 208, 0.14);
        border: 1px solid rgba(61, 214, 208, 0.3);
        box-shadow: inset 0 0 14px rgba(61, 214, 208, 0.08);
    }

    .step-copy strong {
        display: block;
        color: #fff;
        font-size: 1rem;
        font-weight: 650;
    }

    .step-copy span {
        display: block;
        color: var(--portal-mist);
        font-size: 0.9rem;
        line-height: 1.7;
        margin-top: 0.14rem;
    }

    .link-row {
        display: flex;
        flex-direction: column;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .link-row-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 2rem;
        padding: 1.15rem 0.6rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        transition: background 0.25s ease, padding-left 0.25s ease;
        border-radius: 12px;
    }

    .link-row-item:hover {
        background: rgba(255, 255, 255, 0.025);
        padding-left: 1.1rem;
    }

    .link-row-item .link-text {
        display: grid;
        gap: 0.16rem;
    }

    .link-row-item .link-text strong {
        color: var(--portal-white);
        font-size: 1.02rem;
        font-weight: 620;
    }

    .link-row-item .link-text span {
        color: var(--portal-faint);
        font-size: 0.86rem;
    }

    .link-arrow {
        flex: 0 0 auto;
        width: 36px;
        height: 36px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        border: 1px solid rgba(255, 255, 255, 0.1);
        color: var(--portal-cyan);
        background: rgba(61, 214, 208, 0.05);
        transition: all 0.25s ease;
    }

    .link-row-item:hover .link-arrow {
        background: rgba(61, 214, 208, 0.16);
        box-shadow: 0 0 18px rgba(61, 214, 208, 0.16);
    }

    .faq-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
        align-items: start;
    }

    .faq-item {
        border-radius: 18px;
        background: rgba(15, 29, 47, 0.4);
        border: 1px solid rgba(255, 255, 255, 0.07);
        overflow: hidden;
        transition: border-color 0.3s ease, background 0.3s ease;
    }

    .faq-item[open] {
        background: rgba(15, 29, 47, 0.68);
        border-color: rgba(61, 214, 208, 0.22);
        box-shadow: var(--shadow-card);
    }

    .faq-item summary {
        list-style: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
        padding: 1.2rem 1.3rem;
        cursor: pointer;
        color: var(--portal-white);
        font-weight: 580;
        font-size: 1rem;
        line-height: 1.5;
        transition: color 0.25s ease;
    }

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

    .faq-item summary:hover {
        color: #fff;
    }

    .faq-icon {
        flex: 0 0 auto;
        position: relative;
        width: 22px;
        height: 22px;
        border-radius: 50%;
        background: rgba(61, 214, 208, 0.08);
        border: 1px solid rgba(61, 214, 208, 0.25);
        transition: transform 0.35s ease, background 0.3s ease, border-color 0.3s ease;
    }

    .faq-icon::before,
    .faq-icon::after {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        width: 10px;
        height: 1px;
        background: var(--portal-cyan);
        transform: translate(-50%, -50%);
    }

    .faq-icon::after {
        transform: translate(-50%, -50%) rotate(90deg);
    }

    .faq-item[open] .faq-icon {
        transform: rotate(45deg);
        background: rgba(61, 214, 208, 0.15);
        border-color: var(--portal-cyan);
    }

    .faq-item .faq-answer {
        padding: 0 1.3rem 1.25rem;
        color: var(--portal-mist);
        font-size: 0.94rem;
        line-height: 1.85;
    }

    @media (max-width: 768px) {
        .faq-grid {
            grid-template-columns: 1fr;
        }
    }

    .cta-panel {
        position: relative;
        overflow: hidden;
        border-radius: 26px;
        padding: 3.6rem 2.5rem;
        background: linear-gradient(130deg, rgba(14, 30, 48, 0.92), rgba(8, 16, 28, 0.94));
        border: 1px solid rgba(255, 255, 255, 0.08);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        box-shadow: var(--shadow-float);
        text-align: center;
    }

    .cta-panel::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: radial-gradient(circle at 28% 0%, rgba(61, 214, 208, 0.08), transparent 42%), radial-gradient(circle at 80% 100%, rgba(41, 116, 218, 0.1), transparent 46%);
        pointer-events: none;
    }

    .cta-panel h2 {
        position: relative;
        margin: 0 auto 0.7rem;
        max-width: 700px;
        font-size: clamp(1.8rem, 3.4vw, 3rem);
        line-height: 1.2;
        letter-spacing: -0.02em;
        font-weight: 760;
    }

    .cta-panel .cta-desc {
        position: relative;
        max-width: 620px;
        margin: 0 auto;
        color: var(--portal-mist);
        font-size: 1rem;
        line-height: 1.9;
    }

    .cta-panel .cta-actions {
        position: relative;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.9rem;
        margin-top: 2.2rem;
    }

    .cta-note {
        position: relative;
        margin-top: 1.4rem;
        color: var(--portal-faint);
        font-size: 0.82rem;
        letter-spacing: 0.02em;
    }

    .footer-col-title {
        margin: 0;
        color: rgba(255, 255, 255, 0.58);
        font-size: 0.86rem;
        font-weight: 560;
        letter-spacing: 0.12em;
    }

    .footer-link {
        display: inline-block;
        color: var(--portal-mist);
        font-size: 0.92rem;
        line-height: 1.6;
        transition: color 0.22s ease, padding-left 0.22s ease;
    }

    .footer-link:hover {
        color: var(--portal-cyan);
        padding-left: 4px;
    }

    @media (max-width: 520px) {
        .page-banner {
            min-height: 460px;
            padding-top: 5.5rem;
        }
        .banner-actions .btn-primary,
        .banner-actions .btn-ghost {
            width: 100%;
        }
        .cta-panel {
            padding: 2.4rem 1.25rem;
        }
        .cta-panel .cta-actions .btn-primary,
        .cta-panel .cta-actions .btn-ghost {
            width: 100%;
        }
    }

/* roulang page: category4 */
:root {
    --portal-bg: #060B16;
    --portal-bg-soft: #0A1526;
    --portal-surface: rgba(15, 29, 47, 0.6);
    --portal-surface-solid: #0F1D2F;
    --portal-cyan: #3DD6D0;
    --portal-blue: #2974DA;
    --portal-snow: #EAF4FF;
    --portal-mist: #8FA6C3;
    --portal-faint: #5D7290;
    --portal-ok: #20C997;
    --portal-warn: #E8B658;
    --portal-error: #E27070;
    --portal-radius-lg: 24px;
    --portal-radius-md: 16px;
    --portal-radius-sm: 12px;
    --portal-line: rgba(255, 255, 255, 0.1);
  }

  * {
    border-color: rgba(255, 255, 255, 0.08);
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    min-height: 100vh;
    background: var(--portal-bg);
    color: var(--portal-snow);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
    background-image:
      radial-gradient(circle at 12% 8%, rgba(61, 214, 208, 0.12), transparent 32%),
      radial-gradient(circle at 88% 28%, rgba(41, 116, 218, 0.12), transparent 38%),
      linear-gradient(180deg, rgba(6, 11, 22, 0.2) 0%, #060B16 100%);
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
      linear-gradient(rgba(80, 140, 255, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(80, 140, 255, 0.05) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(to bottom, black, transparent 75%);
    -webkit-mask-image: linear-gradient(to bottom, black, transparent 75%);
  }

  body * {
    position: relative;
    z-index: 1;
  }

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

  img,
  svg {
    display: block;
  }

  button {
    font-family: inherit;
    cursor: pointer;
  }

  ::selection {
    background: rgba(61, 214, 208, 0.3);
    color: #fff;
  }

  .container-x {
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

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

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

  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(6, 11, 22, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    transition: background 0.3s ease;
  }

  .desktop-nav .nav-link {
    position: relative;
    color: rgba(234, 244, 255, 0.75);
    font-size: 14.5px;
    letter-spacing: 0.02em;
    padding: 8px 2px;
    transition: color 0.25s ease;
  }

  .desktop-nav .nav-link:hover {
    color: var(--portal-snow);
  }

  .desktop-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 6px;
    height: 1px;
    background: var(--portal-cyan);
    border-radius: 999px;
    transform: translateX(-50%) scaleX(0);
    transition: all 0.25s ease;
  }

  .desktop-nav .nav-link:hover::after,
  .desktop-nav .nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
    width: 18px;
  }

  .desktop-nav .nav-link.active {
    color: #fff;
  }

  .mobile-menu-panel {
    display: none;
  }

  .mobile-menu-panel.open {
    display: block;
  }

  .btn-main,
  .btn-ghost,
  .btn-sm-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 12px;
    font-weight: 500;
    transition: all 0.25s ease;
    white-space: nowrap;
  }

  .btn-main {
    min-height: 46px;
    padding: 0 1.45rem;
    background: var(--portal-cyan);
    color: #032022;
    font-weight: 600;
    box-shadow: 0 0 18px rgba(61, 214, 208, 0.28);
    border: 1px solid rgba(61, 214, 208, 0.6);
  }

  .btn-main:hover {
    background: #62e3dd;
    box-shadow: 0 0 24px rgba(61, 214, 208, 0.42);
    transform: translateY(-1px);
  }

  .btn-main:focus-visible,
  .btn-ghost:focus-visible,
  .btn-sm-ghost:focus-visible,
  .table-link:focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: 3px;
  }

  .btn-ghost {
    min-height: 46px;
    padding: 0 1.4rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.04);
    color: var(--portal-snow);
  }

  .btn-ghost:hover {
    border-color: rgba(61, 214, 208, 0.6);
    color: var(--portal-cyan);
    background: rgba(61, 214, 208, 0.08);
    transform: translateY(-1px);
  }

  .btn-sm-ghost {
    min-height: 36px;
    padding: 0 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(234, 244, 255, 0.82);
    font-size: 13px;
    border-radius: 999px;
  }

  .btn-sm-ghost:hover {
    border-color: rgba(61, 214, 208, 0.55);
    color: var(--portal-cyan);
  }

  .glass-card {
    background: rgba(15, 29, 47, 0.58);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
    border-radius: 24px;
  }

  .feature-card {
    background: rgba(15, 29, 47, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 1.6rem;
    transition: all 0.3s ease;
  }

  .feature-card:hover {
    background: rgba(17, 34, 56, 0.74);
    transform: translateY(-3px);
    border-color: rgba(61, 214, 208, 0.3);
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.38), 0 0 0 1px rgba(61, 214, 208, 0.12);
  }

  .section-kicker {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 13px;
    letter-spacing: 0.16em;
    color: var(--portal-cyan);
    text-transform: uppercase;
  }

  .section-kicker::before {
    content: "";
    width: 18px;
    height: 1px;
    background: var(--portal-cyan);
    border-radius: 999px;
  }

  .stat-card {
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.025);
    border-radius: 16px;
    padding: 1.25rem 1.4rem;
    transition: border-color 0.3s ease;
  }

  .stat-card:hover {
    border-color: rgba(61, 214, 208, 0.32);
  }

  .timeline-flow {
    position: relative;
  }

  .timeline-flow::before {
    content: "";
    position: absolute;
    left: 23px;
    top: 26px;
    bottom: 26px;
    width: 1px;
    background: linear-gradient(to bottom, rgba(61, 214, 208, 0.5), rgba(41, 116, 218, 0.18));
  }

  @media (min-width: 640px) {
    .timeline-flow::before {
      left: auto;
      top: 50%;
      bottom: auto;
      right: 8px;
      width: auto;
      height: 1px;
      background: linear-gradient(to right, rgba(61, 214, 208, 0.5), rgba(41, 116, 218, 0.18));
    }

    .timeline-flow.is-4 .timeline-item:nth-child(even) {
      transform: translateY(24px);
    }
  }

  .step-dot {
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(61, 214, 208, 0.1);
    border: 1px solid rgba(61, 214, 208, 0.28);
    color: var(--portal-cyan);
    box-shadow: 0 0 0 7px rgba(6, 11, 22, 0.6);
  }

  .table-cover table {
    width: 100%;
    min-width: 720px;
    text-align: left;
    border-collapse: separate;
    border-spacing: 0;
  }

  .table-cover th {
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--portal-faint);
    font-weight: 500;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.025);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .table-cover td {
    padding: 1rem;
    vertical-align: top;
    font-size: 14px;
    color: rgba(234, 244, 255, 0.78);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    line-height: 1.7;
  }

  .table-cover tr:last-child td {
    border-bottom: 0;
  }

  .table-cover tr:hover td {
    background: rgba(61, 214, 208, 0.04);
  }

  .scroll-hint {
    color: var(--portal-faint);
  }

  .faq-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.02);
    overflow: hidden;
    transition: border-color 0.3s ease, background 0.3s ease;
  }

  .faq-item.open {
    background: rgba(61, 214, 208, 0.06);
    border-color: rgba(61, 214, 208, 0.28);
  }

  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    text-align: left;
    padding: 1.2rem 1.3rem;
    color: var(--portal-snow);
    font-size: 1rem;
    font-weight: 500;
    background: transparent;
    border: 0;
  }

  .faq-q:focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: -2px;
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--portal-cyan);
    transition: transform 0.32s ease, background 0.3s ease;
    flex: none;
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--portal-cyan);
    color: #032022;
    border-color: var(--portal-cyan);
  }

  .faq-a {
    display: none;
    padding: 0 1.3rem 1.3rem;
    color: var(--portal-mist);
    font-size: 14px;
    line-height: 1.85;
  }

  .faq-item.open .faq-a {
    display: block;
    animation: faqFade 0.3s ease both;
  }

  @keyframes faqFade {
    from {
      opacity: 0;
      transform: translateY(-6px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .cover-feature {
    background: linear-gradient(135deg, rgba(15, 29, 47, 0.72), rgba(6, 11, 22, 0.3));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    overflow: hidden;
  }

  .footer-col-title {
    font-size: 13px;
    letter-spacing: 0.12em;
    color: rgba(234, 244, 255, 0.4);
    font-weight: 500;
    text-transform: uppercase;
  }

  .footer-link {
    color: var(--portal-mist);
    font-size: 14px;
    transition: color 0.25s ease, padding-left 0.25s ease;
  }

  .footer-link:hover {
    color: var(--portal-cyan);
  }

  .hero-bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.42;
  }

  .hero-cover-dark {
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(6, 11, 22, 0.94) 0%, rgba(6, 11, 22, 0.78) 38%, transparent 80%);
  }

  .dot-mark {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--portal-cyan);
    flex: none;
  }

  .table-note {
    color: var(--portal-faint);
    font-size: 12px;
  }

  :focus-visible {
    outline: 2px solid var(--portal-cyan);
    outline-offset: 2px;
  }