/* roulang page: index */
:root {
  --bg: #070A12;
  --bg-raise: #0B1220;
  --glass: rgba(16, 36, 72, 0.52);
  --glass-deep: rgba(8, 16, 34, 0.78);
  --line: rgba(120, 180, 255, 0.28);
  --line-soft: rgba(120, 180, 255, 0.14);
  --primary: #2F6BFF;
  --glow: #49D2FF;
  --accent: #8B7CFF;
  --text: #E8EEF9;
  --muted: #9AA8C3;
  --radius: 18px;
  --header: 64px;
  --max: 1120px;
  --pad: 88px;
  --shadow-glow: 0 0 0 1px rgba(73, 210, 255, 0.08), 0 0 28px rgba(47, 107, 255, 0.22);
  --font: system-ui, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button, input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 32px; line-height: 1.2; font-weight: 700; letter-spacing: 0; }
h2 { font-size: 24px; line-height: 1.3; font-weight: 700; }
h3 { font-size: 18px; line-height: 1.45; font-weight: 700; }
p { color: var(--muted); }
:focus-visible { outline: 2px solid var(--glow); outline-offset: 3px; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header);
  display: flex; align-items: center;
  background: rgba(7, 10, 18, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(16px);
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck {
  background: rgba(5, 8, 16, 0.92);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}
.nav-bar { display: flex; align-items: center; gap: 18px; width: 100%; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-width: 0; font-weight: 700; color: var(--text); letter-spacing: 0; }
.logo-mark {
  width: 12px; height: 12px; border-radius: 99px; flex: none;
  background: var(--glow);
  box-shadow: 0 0 12px var(--glow);
}
.logo-text { font-size: 16px; white-space: nowrap; }
.desk-nav { display: flex; align-items: center; gap: 6px; margin-left: 8px; }
.desk-nav a, .drawer a.nav-link {
  color: var(--muted); padding: 8px 10px; border-radius: 999px; font-size: 14px;
  transition: color .2s ease, background .2s ease;
}
.desk-nav a:hover, .drawer a.nav-link:hover { color: var(--text); background: rgba(47, 107, 255, 0.16); }
.desk-nav a.active, .drawer a.nav-link.active { color: var(--text); background: rgba(47, 107, 255, 0.28); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.cmd-search {
  width: 220px; height: 38px; display: flex; align-items: center; gap: 8px;
  padding: 0 12px; border-radius: 999px;
  background: rgba(16, 36, 72, 0.52);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.cmd-search input {
  width: 100%; border: 0; outline: none; background: transparent; color: var(--text);
  padding: 0;
}
.cmd-search input::placeholder { color: var(--muted); }
.cmd-search:focus-within { border-color: var(--glow); box-shadow: 0 0 0 3px rgba(73, 210, 255, 0.16); }
.shortcut { color: var(--muted); font-size: 14px; padding: 8px 6px; }
.shortcut:hover { color: var(--glow); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer;
  padding: 10px 18px; font-size: 14px; font-weight: 700; line-height: 1;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.12); }
.btn:active { transform: translateY(0); }
.btn:disabled, .btn.is-disabled { opacity: .45; pointer-events: none; filter: none; transform: none; box-shadow: none; }
.btn-glow {
  color: #fff; background: linear-gradient(180deg, #4d86ff 0%, var(--primary) 100%);
  box-shadow: 0 0 18px rgba(47, 107, 255, 0.55), 0 0 2px rgba(73, 210, 255, 0.8);
}
.btn-glow:hover { box-shadow: 0 0 28px rgba(73, 210, 255, 0.72), 0 0 8px rgba(47, 107, 255, 0.7); }
.btn-ghost {
  color: var(--text); background: rgba(16, 36, 72, 0.4);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--glow); box-shadow: 0 0 16px rgba(73, 210, 255, 0.22); }
.icon-btn, .nav-toggle {
  display: none; width: 38px; height: 38px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass); color: var(--text);
  align-items: center; justify-content: center; cursor: pointer;
}
.age-bar {
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted); font-size: 12px; letter-spacing: .08em;
  text-align: center; padding: 6px 12px; background: #080c16;
}
main { display: block; }
.section { padding: var(--pad) 0; position: relative; }
.section.alt { background: linear-gradient(180deg, rgba(11, 18, 32, 0.92), rgba(7, 10, 18, 0.2)); }
.section-head { margin-bottom: 28px; max-width: 760px; }
.section-head p { margin-top: 12px; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--glow); font-size: 13px; margin-bottom: 10px;
}
.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glow);
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 36px; align-items: center;
}
.hero { padding-top: 72px; padding-bottom: 84px; }
.hero-copy p.lead { margin-top: 18px; color: var(--muted); max-width: 640px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.metric-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 28px; }
.metric { min-width: 120px; }
.metric b { display: block; color: var(--text); font-size: 22px; line-height: 1.2; }
.metric span { color: var(--muted); font-size: 13px; }
.stage { padding: 14px; position: relative; }
.stage-top, .stage-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  color: var(--muted); font-size: 12px;
}
.screen {
  margin: 12px 0; height: 250px; border-radius: 14px; position: relative; overflow: hidden;
  background:
    radial-gradient(420px 180px at 20% 20%, rgba(73, 210, 255, 0.35), transparent 60%),
    radial-gradient(320px 200px at 80% 70%, rgba(47, 107, 255, 0.45), transparent 62%),
    linear-gradient(160deg, #10284d, #0a1224 70%);
  border: 1px solid var(--line);
}
.screen-play {
  position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%;
  border: 1px solid rgba(232, 238, 249, 0.4);
  background: rgba(7, 10, 18, 0.35);
  box-shadow: 0 0 24px rgba(73, 210, 255, 0.45);
}
.screen-play::after {
  content: ""; position: absolute; left: 26px; top: 20px;
  border-style: solid; border-width: 12px 0 12px 18px;
  border-color: transparent transparent transparent #fff;
}
.progress { height: 4px; border-radius: 99px; background: rgba(154, 168, 195, 0.25); margin: 8px 0; }
.progress i { display: block; width: 36%; height: 100%; border-radius: inherit; background: var(--glow); box-shadow: 0 0 10px var(--glow); }
.badge, .tag {
  display: inline-flex; align-items: center; border-radius: 999px;
  padding: 3px 8px; font-size: 12px; line-height: 1.4;
  color: var(--accent); border: 1px solid rgba(139, 124, 255, 0.45);
  background: rgba(139, 124, 255, 0.08);
}
.feat-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.span-5 { grid-column: span 5; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-7 { grid-column: span 7; }
.panel { padding: 22px; min-height: 180px; display: flex; flex-direction: column; justify-content: space-between; }
.panel:hover { border-color: rgba(73, 210, 255, 0.55); transform: translateY(-1px); transition: .2s ease; }
.panel h3 { margin-bottom: 8px; }
.scene-grid { display: grid; grid-template-columns: 1.35fr .85fr; gap: 16px; align-items: stretch; }
.scene-lg { padding: 28px; min-height: 360px; display: flex; flex-direction: column; justify-content: flex-end; }
.scene-side { display: grid; gap: 16px; }
.scene-card { padding: 22px; min-height: 172px; display: flex; flex-direction: column; justify-content: space-between; }
.scene-lg, .scene-card { transition: border-color .2s ease, transform .2s ease; }
.scene-lg:hover, .scene-card:hover { border-color: rgba(73, 210, 255, 0.5); transform: translateY(-1px); }
.table-wrap { overflow-x: auto; padding: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; }
td { color: var(--text); }
tr:hover td { background: rgba(47, 107, 255, 0.08); }
.demo-strip { display: grid; grid-template-columns: 180px minmax(0, 1fr) 180px; gap: 14px; align-items: stretch; }
.side-shot { padding: 14px; min-height: 280px; display: flex; flex-direction: column; gap: 10px; }
.side-shot .fake-row, .list-line {
  height: 36px; border-radius: 10px; background: rgba(232, 238, 249, 0.06); border: 1px solid var(--line-soft);
}
.fake-row.on { border-color: rgba(139, 124, 255, 0.55); box-shadow: inset 0 0 12px rgba(139, 124, 255, 0.18); }
.shot-label { color: var(--text); font-weight: 700; }
.point-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.point-list li {
  display: grid; grid-template-columns: 64px 1fr; gap: 14px; align-items: start;
  padding: 16px 18px;
}
.idx { color: var(--glow); font-weight: 700; font-size: 20px; line-height: 1.2; }
.case-list { display: grid; gap: 16px; }
.case {
  display: grid; grid-template-columns: 180px 1fr; gap: 18px; align-items: center; padding: 22px;
}
.case b { display: block; font-size: 40px; line-height: 1; color: var(--text); text-shadow: 0 0 18px rgba(73, 210, 255, 0.35); }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; }
.plan { padding: 28px 22px 22px; position: relative; min-height: 280px; display: flex; flex-direction: column; }
.plan::before {
  content: ""; position: absolute; top: 16px; left: 18px; width: 12px; height: 12px; border-radius: 50%;
  border: 1px solid var(--line); box-shadow: inset 0 0 0 3px rgba(7, 10, 18, 0.4);
}
.plan-featured { border-color: rgba(139, 124, 255, 0.7); box-shadow: 0 0 32px rgba(139, 124, 255, 0.28); }
.plan .duration { margin: 18px 0 8px; font-size: 28px; color: var(--text); font-weight: 700; }
.plan .btn { margin-top: auto; }
.review-wall { columns: 2; column-gap: 14px; }
.review {
  break-inside: avoid; margin: 0 0 14px; padding: 18px;
  display: inline-block; width: 100%;
}
.review.wide { column-span: all; display: block; }
.review:hover { border-color: rgba(73, 210, 255, 0.45); }
.voice { padding: 28px; margin-bottom: 16px; }
.voice header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.avatar {
  width: 44px; height: 44px; border-radius: 50%; flex: none;
  background: radial-gradient(circle at 30% 30%, var(--glow), var(--primary) 55%, #15284d);
  border: 1px solid var(--line);
}
.voice q { display: block; color: var(--text); font-size: 18px; line-height: 1.7; quotes: none; }
.acc { border-top: 1px solid var(--line-soft); }
.acc details { border-bottom: 1px solid var(--line-soft); }
.acc summary {
  cursor: pointer; list-style: none; padding: 16px 4px; color: var(--text); font-weight: 700;
  display: flex; justify-content: space-between; gap: 12px;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after { content: "+"; color: var(--glow); font-weight: 500; }
.acc details[open] summary::after { content: "–"; }
.acc details p { padding: 0 4px 16px; }
.news-list { display: grid; gap: 12px; }
.news-item {
  display: grid; grid-template-columns: 92px 1fr auto; gap: 16px; align-items: center;
  padding: 16px 18px;
}
.news-item:hover { border-color: rgba(73, 210, 255, 0.5); }
.news-item time { color: var(--accent); font-size: 13px; }
.more-row { display: flex; justify-content: flex-end; margin-top: 16px; }
.topic-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.topic {
  min-height: 230px; padding: 26px; display: flex; flex-direction: column; justify-content: space-between;
}
.topic:hover { transform: translateY(-1px); border-color: rgba(73, 210, 255, 0.6); box-shadow: 0 0 26px rgba(47, 107, 255, 0.28); transition: .2s ease; }
.cta-band {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 28px;
}
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.site-footer { border-top: 1px solid var(--line-soft); padding: 48px 0 28px; background: #080c16; }
.foot-grid { display: grid; grid-template-columns: 1.3fr .8fr .9fr; gap: 28px; }
.foot-grid h2 { font-size: 16px; margin-bottom: 12px; }
.foot-grid a { display: block; color: var(--muted); padding: 4px 0; font-size: 14px; }
.foot-grid a:hover { color: var(--glow); }
.copy { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line-soft); color: var(--muted); font-size: 13px; }
.drawer {
  display: none; position: fixed; inset: var(--header) 12px auto 12px; z-index: 39;
  padding: 12px; background: rgba(8, 14, 28, 0.96); border: 1px solid var(--line);
  border-radius: var(--radius); backdrop-filter: blur(18px);
}
.drawer.is-open { display: grid; gap: 6px; }
.search-pop { display: none; padding: 8px 0 4px; }
.search-pop.is-open { display: block; }
@media (min-width: 1024px) {
  h1 { font-size: 52px; }
  h2 { font-size: 32px; }
}
@media (max-width: 1023px) {
  .desk-nav, .shortcut, .nav-bar > .cmd-search { display: none; }
  .icon-btn, .nav-toggle { display: inline-flex; }
  .hero-grid, .scene-grid, .demo-strip, .topic-grid, .foot-grid { grid-template-columns: 1fr; }
  .span-5, .span-3, .span-4, .span-7 { grid-column: span 12; }
  .case { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; gap: 6px; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .screen { height: 200px; }
}
@media (max-width: 767px) {
  :root { --pad: 44px; }
  .plan-grid { grid-template-columns: 1fr; }
  .plan-featured { order: -1; }
  .review-wall { columns: 1; }
  .point-list li { grid-template-columns: 42px 1fr; }
  .hero { padding-top: 40px; }
  .logo-text { font-size: 14px; }
  .btn-nav { padding: 8px 12px; }
}
@media (max-width: 639px) {
  .container { width: min(var(--max), calc(100% - 24px)); }
  .metric b { font-size: 18px; }
  .case b { font-size: 32px; }
  h1 { font-size: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* roulang page: category2 */
:root {
  --bg: #070A12;
  --bg-raise: #0B1220;
  --glass: rgba(16, 36, 72, 0.52);
  --glass-deep: rgba(8, 16, 34, 0.78);
  --line: rgba(120, 180, 255, 0.28);
  --line-soft: rgba(120, 180, 255, 0.14);
  --primary: #2F6BFF;
  --glow: #49D2FF;
  --accent: #8B7CFF;
  --text: #E8EEF9;
  --muted: #9AA8C3;
  --radius: 18px;
  --header: 64px;
  --max: 1120px;
  --pad: 88px;
  --shadow-glow: 0 0 0 1px rgba(73, 210, 255, 0.08), 0 0 28px rgba(47, 107, 255, 0.22);
  --font: system-ui, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button, input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3 { margin: 0; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header);
  display: flex; align-items: center;
  background: rgba(7, 10, 18, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(16px);
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck {
  background: rgba(5, 8, 16, 0.92);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}
.nav-bar { display: flex; align-items: center; gap: 18px; width: 100%; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-width: 0; font-weight: 700; color: var(--text); letter-spacing: 0; }
.logo-mark {
  width: 12px; height: 12px; border-radius: 99px; flex: none;
  background: var(--glow);
  box-shadow: 0 0 12px var(--glow);
}
.logo-text { font-size: 16px; white-space: nowrap; }
.desk-nav { display: flex; align-items: center; gap: 6px; margin-left: 8px; }
.desk-nav a, .drawer a.nav-link {
  color: var(--muted); padding: 8px 10px; border-radius: 999px; font-size: 14px;
  transition: color .2s ease, background .2s ease;
}
.desk-nav a:hover, .drawer a.nav-link:hover { color: var(--text); background: rgba(47, 107, 255, 0.16); }
.desk-nav a.active, .drawer a.nav-link.active { color: var(--text); background: rgba(47, 107, 255, 0.28); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.shortcut { color: var(--muted); font-size: 14px; padding: 8px 10px; border-radius: 999px; transition: color .2s ease, background .2s ease; }
.shortcut:hover { color: var(--text); background: rgba(47, 107, 255, 0.16); }
.cmd-search {
  width: 220px; height: 38px; display: flex; align-items: center; gap: 8px;
  padding: 0 12px; border-radius: 999px;
  background: rgba(16, 36, 72, 0.52);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.cmd-search input {
  width: 100%; border: 0; outline: none; background: transparent; color: var(--text); padding: 0;
}
.cmd-search input::placeholder { color: var(--muted); }
.cmd-search:focus-within { border-color: var(--glow); box-shadow: 0 0 0 3px rgba(73, 210, 255, 0.16); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer;
  padding: 10px 18px; font-size: 14px; font-weight: 700; line-height: 1;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.12); }
.btn:active { transform: translateY(0); }
.btn:disabled, .btn.is-disabled { opacity: .45; pointer-events: none; filter: none; transform: none; box-shadow: none; }
.btn-glow {
  color: #fff; background: linear-gradient(180deg, #4d86ff 0%, var(--primary) 100%);
  box-shadow: 0 0 18px rgba(47, 107, 255, 0.55), 0 0 2px rgba(73, 210, 255, 0.8);
}
.btn-glow:hover { box-shadow: 0 0 28px rgba(73, 210, 255, 0.72), 0 0 8px rgba(47, 107, 255, 0.7); }
.btn-ghost {
  color: var(--text); background: rgba(16, 36, 72, 0.4); border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--glow); box-shadow: 0 0 16px rgba(73, 210, 255, 0.22); }
.icon-btn, .nav-toggle {
  display: none; width: 38px; height: 38px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass); color: var(--text);
  align-items: center; justify-content: center; cursor: pointer;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.icon-btn:hover, .nav-toggle:hover { border-color: var(--glow); box-shadow: 0 0 14px rgba(73, 210, 255, 0.28); transform: translateY(-1px); }
.drawer {
  display: none;
  position: fixed;
  top: var(--header);
  left: 0; right: 0;
  z-index: 39;
  padding: 12px 16px 16px;
  background: rgba(5, 8, 16, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.drawer.open { display: grid; }
.adult-note {
  margin: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  padding: 6px 16px;
  background: rgba(8, 16, 34, 0.9);
  border-bottom: 1px solid var(--line-soft);
}
main { display: block; }
.section { padding: var(--pad) 0; position: relative; }
.section.alt { background: linear-gradient(180deg, rgba(11, 18, 32, 0.92), rgba(7, 10, 18, 0.2)); }
.section-head { margin-bottom: 22px; max-width: 760px; }
.section-head p, .muted { color: var(--muted); }
.section-head p { margin-top: 8px; }
h1 { font-size: 52px; font-weight: 700; line-height: 1.2; color: var(--text); }
h2 { font-size: 30px; font-weight: 700; line-height: 1.3; color: var(--text); }
h3 { font-size: 18px; font-weight: 700; line-height: 1.4; color: var(--text); }
.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(16px);
}
.badge, .tag {
  display: inline-flex; align-items: center; border-radius: 999px;
  padding: 3px 8px; font-size: 12px; line-height: 1.4;
  color: var(--accent); border: 1px solid rgba(139, 124, 255, 0.45);
  background: rgba(139, 124, 255, 0.08);
}
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 2px;
}
.cat-head { padding: 28px 0 18px; }
.cat-bar {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px;
}
.cat-summary { margin-top: 8px; color: var(--muted); max-width: 640px; }
.cat-side { text-align: right; color: var(--muted); font-size: 13px; white-space: nowrap; }
.cat-side strong { display: block; color: var(--text); font-size: 20px; font-weight: 700; }
.shelf {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 16px;
  align-items: start;
}
.shelf-card { padding: 14px; transition: border-color .2s ease, transform .2s ease; }
.shelf-card:hover { border-color: rgba(73, 210, 255, 0.55); transform: translateY(-1px); }
.shelf-feature { grid-column: 1 / -1; display: grid; grid-template-columns: 1.25fr .75fr; gap: 16px; align-items: stretch; }
.shelf-copy p { margin-top: 8px; color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.meta span {
  font-size: 12px; color: var(--muted);
  border: 1px solid var(--line-soft); border-radius: 999px; padding: 2px 8px;
}
.screen {
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 148px; border-radius: 14px; padding: 12px; position: relative; overflow: hidden;
  background:
    radial-gradient(120px 80px at 18% 16%, rgba(73, 210, 255, .38), transparent 70%),
    radial-gradient(180px 120px at 84% 78%, rgba(47, 107, 255, .48), transparent 72%),
    linear-gradient(160deg, #12305f, #070a12 72%);
  border: 1px solid var(--line);
}
.screen.tall { min-height: 196px; }
.screen.mid { min-height: 156px; }
.screen.short { min-height: 112px; }
.screen-top, .screen-bottom { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 12px; position: relative; z-index: 1; }
.play {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(7, 10, 18, .45);
  box-shadow: 0 0 18px rgba(73, 210, 255, .35);
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
}
.play::after {
  content: "";
  position: absolute; left: 18px; top: 15px;
  border-style: solid; border-width: 8px 0 8px 13px;
  border-color: transparent transparent transparent #fff;
}
.tier-panel { padding: 8px 8px 18px; }
.tier {
  display: grid; grid-template-columns: 108px 1fr auto; gap: 16px; align-items: center;
  margin: 10px 16px 0; padding: 16px 18px;
  border-radius: 14px; border: 1px solid var(--line-soft); background: rgba(7, 10, 18, .28);
}
.tier:nth-child(2) { width: calc(100% - 36px); }
.tier:nth-child(3) { width: calc(100% - 72px); }
.tier b { color: var(--glow); font-size: 14px; }
.tier p { color: var(--muted); }
.tier em { font-style: normal; color: var(--accent); font-size: 13px; }
.compare { overflow: hidden; }
.compare-row, .compare-head {
  display: grid; grid-template-columns: 1.1fr 1fr 1.15fr;
}
.compare-head span, .compare-row span {
  padding: 14px 16px; border-bottom: 1px solid var(--line-soft);
}
.compare-head span { color: var(--accent); font-size: 13px; font-weight: 700; }
.compare-row span:last-child, .compare-head span:last-child { background: rgba(139, 124, 255, 0.08); }
.compare-row:last-child span { border-bottom: 0; }
.news-list { display: grid; gap: 14px; }
.news-item {
  display: grid; grid-template-columns: 148px 1fr auto; gap: 16px; align-items: center;
  padding: 14px; transition: border-color .2s ease, transform .2s ease;
}
.news-item:hover { border-color: rgba(73, 210, 255, .5); transform: translateY(-1px); }
.news-item p { color: var(--muted); margin-top: 6px; }
.mini-screen { min-height: 92px; border-radius: 12px; }
.more-bar, .cta-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 22px 24px;
}
.more-bar p, .cta-bar p { color: var(--muted); margin-top: 6px; }
.device-list { display: grid; gap: 12px; }
.device-row {
  display: grid; grid-template-columns: 88px 1fr; gap: 16px; align-items: center;
  padding: 16px 18px;
}
.device-row + .device-row { margin-top: 0; }
.device-list .device-row:nth-child(2) { margin-left: 28px; }
.device-list .device-row:nth-child(3) { margin-left: 56px; }
.device-row b { color: var(--glow); }
.device-row p { color: var(--muted); }
.site-footer {
  padding: 48px 0 28px;
  border-top: 1px solid var(--line-soft);
  background: #060912;
}
.foot-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr; gap: 28px; }
.site-footer h2 { font-size: 14px; margin-bottom: 10px; color: var(--text); }
.site-footer a { color: var(--muted); }
.site-footer p { color: var(--muted); }
.foot-grid div { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.foot-grid .logo { margin-bottom: 4px; }
.copy {
  margin-top: 28px; padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  color: var(--muted); font-size: 13px;
}
@media (max-width: 1280px) {
  .container { width: min(var(--max), calc(100% - 32px)); }
}
@media (max-width: 1024px) {
  :root { --pad: 64px; }
  .desk-nav, .shortcut { display: none; }
  .icon-btn, .nav-toggle { display: inline-flex; }
  .cmd-search { display: none; }
  .cmd-search.show {
    display: flex; position: absolute; top: calc(var(--header) + 8px);
    left: 16px; right: 16px; width: auto; z-index: 50;
  }
  .shelf-feature { grid-template-columns: 1fr; }
  .tier:nth-child(2), .tier:nth-child(3) { width: auto; }
  .device-list .device-row:nth-child(2),
  .device-list .device-row:nth-child(3) { margin-left: 0; }
}
@media (max-width: 768px) {
  :root { --pad: 44px; }
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .cat-bar, .more-bar, .cta-bar, .news-item, .device-row, .compare-row, .compare-head {
    grid-template-columns: 1fr;
    display: grid;
  }
  .cat-bar { align-items: start; }
  .cat-side { text-align: left; white-space: normal; }
  .shelf { grid-template-columns: 1fr; }
  .tier { grid-template-columns: 1fr; gap: 6px; }
  .news-item .btn { justify-self: start; }
  .logo-text { font-size: 14px; }
  .btn-nav { padding: 8px 12px; }
  .foot-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(var(--max), calc(100% - 24px)); }
  .section { padding: 40px 0; }
  .nav-bar { gap: 8px; }
}

/* roulang page: category1 */
:root {
 --bg: #070A12;
 --bg-raise: #0B1220;
 --glass: rgba(16, 36, 72, 0.52);
 --glass-deep: rgba(8, 16, 34, 0.78);
 --line: rgba(120, 180, 255, 0.28);
 --line-soft: rgba(120, 180, 255, 0.14);
 --primary: #2F6BFF;
 --glow: #49D2FF;
 --accent: #8B7CFF;
 --text: #E8EEF9;
 --muted: #9AA8C3;
 --radius: 18px;
 --header: 64px;
 --max: 1120px;
 --pad: 88px;
 --shadow-glow: 0 0 0 1px rgba(73, 210, 255, 0.08), 0 0 28px rgba(47, 107, 255, 0.22);
 --font: system-ui, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
/* roulang page: category1 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
 margin: 0;
 background: var(--bg);
 color: var(--text);
 font-family: var(--font);
 font-size: 16px;
 line-height: 1.75;
 text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button, input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 700; line-height: 1.2; letter-spacing: 0; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.sr-only {
 position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
 overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.site-header {
 position: sticky; top: 0; z-index: 40;
 height: var(--header);
 display: flex; align-items: center;
 background: rgba(7, 10, 18, 0.72);
 border-bottom: 1px solid transparent;
 backdrop-filter: blur(16px);
 transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-stuck {
 background: rgba(5, 8, 16, 0.92);
 border-bottom-color: var(--line);
 box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}
.nav-bar { display: flex; align-items: center; gap: 18px; width: 100%; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-width: 0; font-weight: 700; color: var(--text); letter-spacing: 0; }
.logo-mark {
 width: 12px; height: 12px; border-radius: 99px; flex: none;
 background: var(--glow);
 box-shadow: 0 0 12px var(--glow);
}
.logo-text { font-size: 16px; white-space: nowrap; }
.desk-nav { display: flex; align-items: center; gap: 6px; margin-left: 8px; }
.desk-nav a, .drawer a.nav-link {
 color: var(--muted); padding: 8px 10px; border-radius: 999px; font-size: 14px;
 transition: color .2s ease, background .2s ease;
}
.desk-nav a:hover, .drawer a.nav-link:hover, .drawer a:hover { color: var(--text); background: rgba(47, 107, 255, 0.16); }
.desk-nav a.active, .drawer a.nav-link.active { color: var(--text); background: rgba(47, 107, 255, 0.28); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.shortcut { color: var(--muted); font-size: 14px; padding: 8px 4px; transition: color .2s ease; }
.shortcut:hover { color: var(--text); }
.cmd-search {
 width: 220px; height: 38px; display: flex; align-items: center; gap: 8px;
 padding: 0 12px; border-radius: 999px;
 background: rgba(16, 36, 72, 0.52);
 border: 1px solid var(--line);
 backdrop-filter: blur(12px);
}
.cmd-search input {
 width: 100%; border: 0; outline: none; background: transparent; color: var(--text); padding: 0;
}
.cmd-search input::placeholder { color: var(--muted); }
.cmd-search:focus-within { border-color: var(--glow); box-shadow: 0 0 0 3px rgba(73, 210, 255, 0.16); }
.btn {
 display: inline-flex; align-items: center; justify-content: center; gap: 6px;
 border-radius: 999px; border: 1px solid transparent; cursor: pointer;
 padding: 10px 18px; font-size: 14px; font-weight: 700; line-height: 1;
 transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.12); }
.btn:active { transform: translateY(0); }
.btn:disabled, .btn.is-disabled { opacity: .45; pointer-events: none; filter: none; transform: none; box-shadow: none; }
.btn-glow {
 color: #fff; background: linear-gradient(180deg, #4d86ff 0%, var(--primary) 100%);
 box-shadow: 0 0 18px rgba(47, 107, 255, 0.55), 0 0 2px rgba(73, 210, 255, 0.8);
}
.btn-glow:hover { box-shadow: 0 0 28px rgba(73, 210, 255, 0.72), 0 0 8px rgba(47, 107, 255, 0.7); }
.btn-ghost {
 color: var(--text); background: rgba(16, 36, 72, 0.4);
 border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--glow); box-shadow: 0 0 16px rgba(73, 210, 255, 0.22); }
.btn-nav { padding: 8px 14px; height: 36px; }
.icon-btn, .nav-toggle {
 display: none; width: 38px; height: 38px; border-radius: 999px;
 border: 1px solid var(--line); background: var(--glass); color: var(--text);
 align-items: center; justify-content: center; cursor: pointer;
}
.icon-btn:hover, .nav-toggle:hover { border-color: var(--glow); }
.drawer {
 display: none; flex-direction: column; gap: 4px;
 padding: 8px 16px 16px;
 background: rgba(5, 8, 16, 0.96);
 border-bottom: 1px solid var(--line);
}
.drawer[hidden] { display: none !important; }
.drawer a { border-radius: 12px; }
.adult-bar {
 text-align: center; font-size: 12px; letter-spacing: 0.08em;
 color: var(--muted); padding: 6px 12px;
 border-bottom: 1px solid var(--line-soft);
 background: rgba(8, 16, 34, 0.78);
}
main { display: block; }
.section { padding: var(--pad) 0; position: relative; }
.section.alt { background: linear-gradient(180deg, rgba(11, 18, 32, 0.92), rgba(7, 10, 18, 0.2)); }
.section-head { margin-bottom: 28px; max-width: 760px; }
.section-head h2 { font-size: 30px; }
.section-head p, .lead { margin-top: 12px; color: var(--muted); }
.glass {
 background: var(--glass);
 border: 1px solid var(--line);
 border-radius: var(--radius);
 backdrop-filter: blur(16px);
 box-shadow: var(--shadow-glow);
}
.badge, .tag {
 display: inline-flex; align-items: center; border-radius: 999px;
 padding: 3px 8px; font-size: 12px; line-height: 1.4;
 color: var(--accent); border: 1px solid rgba(139, 124, 255, 0.45);
 background: rgba(139, 124, 255, 0.08);
}
.cat-head { padding: 28px 0 12px; background: transparent; }
.cat-head-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; }
.cat-head h1 { font-size: 52px; font-weight: 700; line-height: 1.2; max-width: 16em; }
.kicker { color: var(--glow); font-size: 13px; margin-bottom: 8px; }
.cat-meta { min-width: 220px; padding: 14px 16px; text-align: right; flex: none; }
.cat-meta strong {
 display: block; font-size: 28px; line-height: 1.2; color: var(--glow);
 text-shadow: 0 0 16px rgba(73, 210, 255, 0.45);
}
.cat-meta span { color: var(--muted); font-size: 13px; }
.shelf { display: grid; gap: 12px; }
.shelf-item {
 display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 16px;
 padding: 12px; align-items: center;
 transition: border-color .2s ease, transform .2s ease;
}
.shelf-item:hover { border-color: rgba(73, 210, 255, 0.55); transform: translateY(-1px); }
.thumb {
 height: 112px; border-radius: 14px; position: relative; overflow: hidden;
 background:
  linear-gradient(160deg, rgba(47, 107, 255, 0.55), rgba(7, 10, 18, 0.2) 62%),
  repeating-linear-gradient(90deg, rgba(73, 210, 255, 0.16) 0 2px, transparent 2px 18px);
 border: 1px solid var(--line-soft);
}
.thumb .badge { position: absolute; left: 10px; top: 10px; }
.thumb i {
 position: absolute; right: 12px; bottom: 12px; width: 28px; height: 28px; border-radius: 99px;
 border: 1px solid rgba(73, 210, 255, 0.6);
 box-shadow: 0 0 12px rgba(73, 210, 255, 0.35);
}
.thumb i::before {
 content: ""; position: absolute; left: 11px; top: 8px;
 border-style: solid; border-width: 6px 0 6px 9px;
 border-color: transparent transparent transparent var(--glow);
}
.shelf-copy h3 { font-size: 18px; }
.shelf-copy p { color: var(--muted); margin-top: 6px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 10px; color: var(--muted); font-size: 13px; align-items: center; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.chip {
 border-radius: 999px; border: 1px solid var(--line); background: rgba(16, 36, 72, 0.35);
 color: var(--muted); padding: 7px 14px; cursor: pointer; line-height: 1.2;
 transition: color .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.chip:hover, .chip.is-on {
 color: var(--text); border-color: rgba(139, 124, 255, 0.6);
 background: rgba(139, 124, 255, 0.12);
 box-shadow: 0 0 14px rgba(139, 124, 255, 0.22);
}
.filter-note {
 padding: 18px 20px; color: var(--text);
 display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.filter-note strong { color: var(--glow); font-size: 13px; white-space: nowrap; }
.pick-list { display: grid; gap: 12px; }
.pick-card {
 display: grid; grid-template-columns: 72px minmax(0, 1fr) auto; gap: 16px;
 align-items: center; padding: 16px 18px;
 transition: border-color .2s ease, transform .2s ease;
}
.pick-card:hover { border-color: rgba(73, 210, 255, 0.5); transform: translateY(-1px); }
.pick-no {
 width: 72px; height: 72px; border-radius: 14px; display: grid; place-items: center;
 font-size: 20px; color: var(--glow);
 background: rgba(47, 107, 255, 0.16); border: 1px solid var(--line);
}
.pick-card h3 { font-size: 18px; }
.pick-card p { color: var(--muted); margin-top: 4px; font-size: 14px; }
.rhythm {
 display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr); gap: 18px; align-items: stretch;
}
.rhythm-copy { padding: 24px; }
.rhythm-copy h2 { font-size: 30px; }
.rhythm-copy p { color: var(--muted); margin-top: 12px; }
.rounds { display: grid; gap: 0; padding: 8px 8px 8px 0; }
.round {
 display: grid; grid-template-columns: 92px 1fr; gap: 12px; padding: 16px 18px;
 border-bottom: 1px solid var(--line-soft);
}
.round:last-child { border-bottom: 0; }
.round b { color: var(--glow); font-size: 14px; }
.round span { color: var(--muted); }
.more-bar, .return-bar {
 display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 22px 24px;
}
.more-bar h2, .return-bar h2 { font-size: 28px; }
.more-bar p, .return-bar p { color: var(--muted); margin-top: 8px; }
.faq { border-top: 1px solid var(--line-soft); }
.faq-item { border-bottom: 1px solid var(--line-soft); }
.faq-q {
 width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 12px;
 background: transparent; border: 0; padding: 18px 0; cursor: pointer; text-align: left; font-weight: 700; font-size: 17px;
}
.faq-q i {
 width: 22px; height: 22px; border-radius: 99px; border: 1px solid var(--line); position: relative; flex: none;
}
.faq-q i::before, .faq-q i::after {
 content: ""; position: absolute; background: var(--glow); left: 5px; right: 5px; top: 10px; height: 1.5px;
}
.faq-q i::after { transform: rotate(90deg); transition: transform .2s ease; }
.faq-item.is-open .faq-q i::after { transform: rotate(0); }
.faq-a { display: none; color: var(--muted); padding: 0 36px 16px 0; }
.faq-item.is-open .faq-a { display: block; }
.site-footer {
 padding: 48px 0 28px;
 border-top: 1px solid var(--line-soft);
 background: #060912;
}
.foot-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr; gap: 28px; }
.site-footer h2 { font-size: 16px; margin: 0 0 12px; }
.site-footer .foot-grid a { display: block; color: var(--muted); padding: 4px 0; transition: color .2s ease; }
.site-footer .foot-grid a.logo { display: inline-flex; color: var(--text); padding: 0; }
.site-footer a:hover { color: var(--text); }
.copy {
 margin-top: 28px; color: var(--muted); font-size: 13px;
 border-top: 1px solid var(--line-soft); padding-top: 16px;
}
a:focus-visible, button:focus-visible, input:focus-visible, .chip:focus-visible {
 outline: 2px solid var(--glow); outline-offset: 2px;
}
@media (max-width: 1280px) {
 .cat-head h1 { font-size: 46px; }
}
@media (max-width: 1024px) {
 .cmd-search { width: 160px; }
 .desk-nav { gap: 0; }
 .rhythm, .cat-head-inner { gap: 16px; }
 .pick-card { grid-template-columns: 64px minmax(0, 1fr); }
 .pick-card .btn { display: none; }
}
@media (max-width: 768px) {
 :root { --pad: 44px; }
 .desk-nav, .shortcut, .cmd-search { display: none; }
 .cmd-search.is-open {
  display: flex; position: absolute; left: 16px; right: 16px; top: calc(var(--header) + 8px);
  width: auto; z-index: 50;
 }
 .icon-btn, .nav-toggle { display: inline-flex; }
 .drawer:not([hidden]) { display: flex; }
 .logo-text { font-size: 14px; }
 .cat-head { padding: 22px 0 4px; }
 .cat-head h1 { font-size: 32px; }
 .cat-head-inner, .shelf-item, .rhythm, .more-bar, .return-bar, .foot-grid, .filter-note {
  grid-template-columns: 1fr; display: grid;
 }
 .more-bar, .return-bar, .filter-note { display: flex; flex-direction: column; align-items: flex-start; }
 .cat-meta { text-align: left; width: 100%; }
 .section-head h2, .rhythm-copy h2, .more-bar h2, .return-bar h2 { font-size: 24px; }
 .pick-card { grid-template-columns: 56px minmax(0, 1fr); }
 .thumb { height: 132px; }
}
@media (max-width: 640px) {
 .nav-bar { gap: 8px; }
 .logo-text { font-size: 13px; }
 .btn-nav { padding: 8px 10px; font-size: 13px; }
 .container { width: min(var(--max), calc(100% - 24px)); }
 .round { grid-template-columns: 72px 1fr; padding: 14px 8px; }
}