/* roulang page: index */
:root {
  --bg: #05080F;
  --panel: #07111F;
  --panel-2: #0E2A4A;
  --cyan: #3DDCFF;
  --amber: #E8A317;
  --text: #F4F7FB;
  --muted: #9FB0C7;
  --line: rgba(255,255,255,.15);
  --glass: rgba(255,255,255,.1);
  --radius: 18px;
  --shadow: 0 20px 50px rgba(8,20,40,.45);
  --pad: 88px;
  --gap: 24px;
  --header: 64px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background:
    radial-gradient(1000px 480px at 80% -10%, rgba(14,42,74,.9), transparent 60%),
    radial-gradient(800px 420px at -10% 20%, rgba(14,42,74,.55), transparent 55%),
    var(--bg);
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
button, input { font-family: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 30px; line-height: 1.25; font-weight: 700; letter-spacing: .01em; }
h2 { font-size: 24px; line-height: 1.35; font-weight: 700; }
h3 { font-size: 18px; line-height: 1.45; font-weight: 650; }
p { color: var(--muted); font-size: 16px; }
.num { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-variant-numeric: tabular-nums; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.skip {
  position: absolute; left: 12px; top: -40px; background: var(--cyan); color: #041018; padding: 6px 10px; z-index: 80;
}
.skip:focus { top: 8px; }
.site-header {
  position: sticky; top: 0; z-index: 40; height: var(--header);
  display: flex; align-items: center;
  background: rgba(5,8,15,.9);
  border-bottom: 1px solid rgba(61,220,255,.18);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.brand { display: flex; flex-direction: column; line-height: 1.15; color: var(--text); font-weight: 760; font-size: 15px; }
.brand small { color: var(--cyan); font-size: 12px; letter-spacing: .12em; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn, .btn {
  border: 0; cursor: pointer; color: var(--text);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease;
}
.icon-btn {
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line);
  display: grid; place-items: center; gap: 5px;
}
.icon-btn span { display: block; width: 18px; height: 1.5px; background: var(--text); }
.icon-btn:hover { border-color: var(--cyan); }
.icon-btn:focus-visible, .btn:focus-visible, .drawer-link:focus-visible, .faq summary:focus-visible, .text-link:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 999px; font-size: 15px; font-weight: 650;
}
.btn-primary {
  background: #0c3a52;
  box-shadow: inset 0 0 0 1px var(--cyan), 0 0 16px rgba(232,163,23,.28), 0 0 22px rgba(61,220,255,.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: inset 0 0 0 1px var(--cyan), 0 0 22px rgba(232,163,23,.45), 0 0 28px rgba(61,220,255,.38); }
.btn-primary:active { transform: none; filter: brightness(.88); }
.btn-ghost { background: transparent; box-shadow: inset 0 0 0 1px rgba(255,255,255,.28); }
.btn-ghost:hover { box-shadow: inset 0 0 0 1px var(--cyan); transform: translateY(-2px); }
.btn-ghost:active { transform: none; filter: brightness(.9); }
.drawer { position: fixed; inset: 0; z-index: 60; display: none; }
.drawer.open { display: block; }
.drawer-mask { position: absolute; inset: 0; background: rgba(5,8,15,.92); backdrop-filter: blur(10px); }
.drawer-panel {
  position: absolute; top: 0; right: 0; height: 100%; width: min(520px, 100%);
  padding: 28px 28px 40px; background: linear-gradient(180deg, rgba(7,17,31,.96), rgba(5,8,15,.96));
  border-left: 1px solid rgba(61,220,255,.25);
  display: flex; flex-direction: column; gap: 8px;
}
.drawer-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.drawer-link {
  display: block; font-size: 32px; line-height: 1.35; padding: 10px 0 10px 14px;
  border-left: 3px solid transparent; color: var(--text);
}
.drawer-link:hover { color: var(--cyan); }
.drawer-link.is-current { border-left-color: var(--amber); color: var(--text); }
body.lock { overflow: hidden; }
main { display: block; }
.block { padding: var(--pad) 0; position: relative; }
.block-a { background: transparent; }
.block-b { background: linear-gradient(180deg, rgba(7,17,31,.92), rgba(14,42,74,.28)); }
.block-c { background: rgba(5,8,15,.35); }
.lead { margin-top: 12px; max-width: 760px; font-size: 17px; }
.hero-grid, .split, .price-grid, .compare, .cta-bar, .topic-grid { display: grid; gap: var(--gap); }
.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.kicker { color: var(--cyan); font-size: 13px; letter-spacing: .14em; margin-bottom: 10px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.player { padding: 14px; }
.screen {
  height: 250px; border-radius: 14px; position: relative; overflow: hidden;
  background:
    linear-gradient(160deg, rgba(61,220,255,.18), transparent 40%),
    linear-gradient(320deg, rgba(232,163,23,.16), transparent 42%),
    linear-gradient(180deg, #10283f, #07111f 70%);
}
.screen i { position: absolute; left: 8%; right: 8%; height: 1px; background: rgba(244,247,251,.08); }
.screen i:nth-child(1) { top: 22%; }
.screen i:nth-child(2) { top: 48%; }
.screen i:nth-child(3) { top: 74%; }
.badge {
  display: inline-flex; align-items: center; min-height: 26px; padding: 0 10px;
  border-radius: 999px; border: 1px solid rgba(61,220,255,.45); color: var(--cyan); font-size: 12px;
  background: rgba(5,8,15,.35);
}
.badge-amber { color: var(--amber); border-color: rgba(232,163,23,.7); }
.screen .badge { position: absolute; top: 14px; left: 14px; }
.time-tag { position: absolute; right: 14px; bottom: 14px; color: var(--text); font-size: 13px; }
.progress { margin-top: 12px; height: 4px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; }
.progress b { display: block; height: 100%; width: 62%; background: linear-gradient(90deg, var(--amber), var(--cyan)); }
.meta-row, .stat-row, .filter-note { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 12px; color: var(--muted); font-size: 13px; }
.bento { display: grid; gap: 16px; margin-top: 28px; }
.card { padding: 20px; }
.card h3 { margin-bottom: 8px; }
.card p { font-size: 15px; }
.scene-row { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; margin-top: 28px; padding-bottom: 6px; }
.scene-card { min-width: 80%; scroll-snap-align: start; padding: 22px; }
.scene-card strong { display: block; color: var(--text); font-size: 28px; margin: 8px 0; }
.demo-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.swatch { height: 64px; border-radius: 12px; border: 1px solid var(--line); }
.swatch:nth-child(1) { background: #12304a; }
.swatch:nth-child(2) { background: #1a4460; }
.swatch:nth-child(3) { background: #0e2a4a; }
.swatch:nth-child(4) { background: #24556d; }
.topic-grid { margin-top: 28px; }
.entry-card { display: block; padding: 22px; min-height: 180px; }
.entry-card:hover { transform: translateY(-2px); border-color: rgba(61,220,255,.55); }
.entry-card p { margin: 8px 0 16px; }
.link-quiet { color: var(--cyan); }
.timeline { margin-top: 28px; display: grid; gap: 0; }
.step { display: grid; grid-template-columns: 28px 1fr; gap: 14px; }
.rail { width: 3px; background: rgba(232,163,23,.85); margin: 0 auto; min-height: 100%; border-radius: 99px; }
.step article { padding: 0 0 26px; }
.scale { margin-top: 28px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.scale article { padding: 16px; position: relative; }
.scale article::before { content: ""; position: absolute; left: 16px; right: 16px; top: 0; height: 2px; background: rgba(61,220,255,.8); }
.price-grid { margin-top: 28px; }
.price { padding: 22px; }
.price.is-hot { box-shadow: var(--shadow), inset 0 0 0 1px var(--amber), 0 0 24px rgba(232,163,23,.2); }
.price .fee { font-size: 40px; color: var(--text); margin: 8px 0; }
.rows { display: grid; gap: 8px; margin: 12px 0 18px; }
.rows div { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid rgba(255,255,255,.08); padding-top: 8px; color: var(--muted); }
.rows b { color: var(--text); font-weight: 600; }
.review-grid { margin-top: 28px; }
.quote { padding: 18px 18px 16px; margin: 0 0 16px; }
.quote p { color: var(--text); font-size: 16px; }
.quote span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.stats { margin-top: 22px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 18px; }
.stats b { display: block; font-size: 34px; color: var(--text); }
.stats span { color: var(--muted); font-size: 14px; }
.compare { margin-top: 28px; }
.bar-col { padding: 18px; }
.bar { height: 8px; border-radius: 99px; background: rgba(255,255,255,.08); margin: 8px 0 14px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--cyan); }
.bar.warm i { background: linear-gradient(90deg, var(--amber), var(--cyan)); }
.news { margin-top: 22px; display: grid; }
.news a.row, .news .row {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 12px; align-items: center;
  padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,.08); color: var(--text);
}
.news a.row:hover { color: var(--cyan); }
.more-wrap { margin-top: 18px; }
.faq { margin-top: 18px; display: grid; gap: 10px; }
.faq details { padding: 0 16px; }
.faq summary { cursor: pointer; min-height: 52px; display: flex; align-items: center; justify-content: space-between; list-style: none; font-weight: 650; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--cyan); font-size: 22px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 14px; }
.cta-bar { padding: 22px; align-items: center; }
.note { margin-top: 12px; color: var(--text); }
.rule { padding: 18px 20px; border-top: 1px solid rgba(244,247,251,.08); border-bottom: 1px solid rgba(244,247,251,.08); }
.site-footer { padding: 36px 0 48px; color: var(--muted); background: #05080F; }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a:hover { color: var(--cyan); }
.fine { font-size: 13px; }
@media (min-width: 768px) {
  .review-grid { columns: 2; column-gap: 24px; }
  .quote { break-inside: avoid; }
  .bento { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  h1 { font-size: 52px; }
  h2 { font-size: 36px; }
  p, .lead { font-size: 17px; }
  .hero-grid { grid-template-columns: minmax(0, 1.38fr) minmax(0, 1fr); align-items: center; }
  .bento { grid-template-columns: 1.15fr .85fr 1fr; grid-template-areas: "a a b" "c d d"; gap: 24px; }
  .bento .c1 { grid-area: a; }
  .bento .c2 { grid-area: b; }
  .bento .c3 { grid-area: c; }
  .bento .c4 { grid-area: d; }
  .scene-row { display: grid; grid-template-columns: 40fr 35fr 25fr; overflow: visible; }
  .scene-card { min-width: 0; }
  .topic-grid, .price-grid, .compare, .cta-bar { grid-template-columns: 1.15fr .85fr; }
  .compare { grid-template-columns: 1fr 1fr; }
  .price-grid { grid-template-columns: 1fr 1fr; }
  .cta-bar { grid-template-columns: 1.4fr auto; }
}
@media (max-width: 1023px) {
  .scale { grid-template-columns: 1fr 1fr; }
  .news a.row, .news .row { grid-template-columns: 86px 1fr; }
  .news a.row em, .news .row em { display: none; }
}
@media (max-width: 640px) {
  :root { --pad: 48px; --gap: 16px; }
  .glass { backdrop-filter: blur(8px); box-shadow: 0 10px 24px rgba(8,20,40,.35); }
  .site-header { backdrop-filter: blur(6px); }
  .drawer-mask { backdrop-filter: none; }
  .drawer-link { font-size: 30px; }
  .stats, .demo-strip, .scale { grid-template-columns: 1fr; }
  .brand { font-size: 13px; }
  .btn-head { display: none; }
  .screen { height: 190px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .btn-primary:hover, .btn-ghost:hover, .entry-card:hover { transform: none; }
}

/* roulang page: category2 */
:root {
 --bg: #05080F;
 --panel: #07111F;
 --panel-2: #0E2A4A;
 --cyan: #3DDCFF;
 --amber: #E8A317;
 --text: #F4F7FB;
 --muted: #9FB0C7;
 --line: rgba(255,255,255,.15);
 --glass: rgba(255,255,255,.1);
 --radius: 18px;
 --shadow: 0 20px 50px rgba(8,20,40,.45);
 --pad: 88px;
 --gap: 24px;
 --header: 64px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
 margin: 0;
 color: var(--text);
 font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
 font-size: 16px;
 line-height: 1.7;
 background:
  radial-gradient(1000px 480px at 80% -10%, rgba(14,42,74,.9), transparent 60%),
  radial-gradient(800px 420px at -10% 20%, rgba(14,42,74,.55), transparent 55%),
  var(--bg);
 min-height: 100vh;
}
img { max-width: 100%; display: block; }
button, input, select { font-family: inherit; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 760; line-height: 1.25; }
.container { width: min(1120px, 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(5,8,15,.9);
 border-bottom: 1px solid rgba(61,220,255,.18);
 backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.brand { display: flex; flex-direction: column; line-height: 1.15; color: var(--text); font-weight: 760; font-size: 15px; }
.brand span:last-child { color: var(--cyan); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn, .btn, .scale-btn, .sorter {
 cursor: pointer; color: var(--text);
 transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease;
}
.icon-btn {
 width: 44px; height: 44px; border-radius: 12px;
 background: rgba(255,255,255,.06);
 border: 1px solid var(--line);
 display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.icon-btn span { display: block; width: 18px; height: 1.5px; background: var(--text); }
.icon-btn:hover, .icon-btn:focus-visible { border-color: var(--cyan); }
.icon-btn:focus-visible, .btn:focus-visible, .drawer-link:focus-visible, .faq summary:focus-visible, .scale-btn:focus-visible, .sorter:focus-visible, .text-link:focus-visible {
 outline: 2px solid var(--cyan); outline-offset: 3px;
}
.btn {
 display: inline-flex; align-items: center; justify-content: center;
 min-height: 44px; padding: 0 18px; border-radius: 999px; font-size: 15px; font-weight: 650;
 border: 0; background: transparent;
}
.btn-head { min-height: 40px; padding: 0 14px; font-size: 14px; }
.btn-primary {
 background: #0c3a52;
 box-shadow: inset 0 0 0 1px var(--cyan), 0 0 16px rgba(232,163,23,.28), 0 0 22px rgba(61,220,255,.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: inset 0 0 0 1px var(--cyan), 0 0 22px rgba(232,163,23,.45), 0 0 28px rgba(61,220,255,.38); }
.btn-primary:active { transform: none; filter: brightness(.88); }
.btn-ghost { background: transparent; box-shadow: inset 0 0 0 1px rgba(255,255,255,.28); }
.btn-ghost:hover { box-shadow: inset 0 0 0 1px var(--cyan); transform: translateY(-2px); }
.btn-ghost:active { transform: none; filter: brightness(.9); }
.btn[disabled] { cursor: not-allowed; filter: brightness(.75); transform: none; box-shadow: inset 0 0 0 1px rgba(255,255,255,.16); }
.drawer { position: fixed; inset: 0; z-index: 60; }
.drawer[hidden] { display: none !important; }
.drawer-mask { position: absolute; inset: 0; background: rgba(5,8,15,.92); backdrop-filter: blur(10px); }
.drawer-panel {
 position: absolute; top: 0; right: 0; height: 100%; width: min(520px, 100%);
 padding: 28px 28px 40px;
 background: linear-gradient(180deg, rgba(7,17,31,.96), rgba(5,8,15,.96));
 border-left: 1px solid rgba(61,220,255,.25);
 display: flex; flex-direction: column; gap: 8px;
}
.drawer-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.drawer-link {
 display: block; font-size: 32px; line-height: 1.35; padding: 10px 0 10px 14px;
 border-left: 3px solid transparent; color: var(--text);
}
.drawer-link:hover { color: var(--cyan); }
.drawer-link.is-current { border-left-color: var(--amber); color: var(--text); }
body.lock { overflow: hidden; }
main { display: block; }
.section { padding: var(--pad) 0; position: relative; }
.section + .section { border-top: 1px solid rgba(255,255,255,.08); }
.band { background: linear-gradient(180deg, rgba(7,17,31,.92), rgba(14,42,74,.42)); }
.band-quiet { background: rgba(7,17,31,.55); }
.glass {
 background: var(--glass);
 border: 1px solid var(--line);
 border-radius: var(--radius);
 box-shadow: var(--shadow);
 backdrop-filter: blur(16px);
}
.hairline { height: 1px; background: rgba(255,255,255,.08); border: 0; margin: 18px 0 0; }
h1 { font-size: 52px; letter-spacing: .01em; }
h2 { font-size: 36px; }
.lead { margin-top: 12px; max-width: 640px; font-size: 17px; color: var(--text); }
.muted { color: var(--muted); }
.num { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-variant-numeric: tabular-nums; }
.badge {
 display: inline-flex; align-items: center; min-height: 26px; padding: 0 10px;
 border-radius: 999px; border: 1px solid rgba(61,220,255,.45); color: var(--cyan); font-size: 12px;
 background: rgba(5,8,15,.35);
}
.badge-amber { color: var(--amber); border-color: rgba(232,163,23,.7); }
.head-grid { display: grid; grid-template-columns: 1.35fr .75fr; gap: 28px; align-items: end; }
.result-line { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; margin-top: 18px; color: var(--muted); font-size: 14px; }
.sorter {
 appearance: none; -webkit-appearance: none;
 background: rgba(255,255,255,.06) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%239FB0C7' d='M0 0l6 8 6-8z'/%3E%3C/svg%3E") no-repeat right 14px center;
 border: 1px solid var(--line); border-radius: 999px; min-height: 40px; padding: 0 36px 0 14px; color: var(--text);
}
.sorter:hover { border-color: var(--cyan); }
.legend { padding: 18px 18px 14px; }
.legend h2 { font-size: 18px; margin-bottom: 14px; }
.legend-scale { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.legend-item { min-height: 72px; border-top: 1px solid rgba(61,220,255,.85); padding-top: 8px; color: var(--muted); font-size: 13px; }
.legend-item b { display: block; color: var(--text); font-size: 18px; font-weight: 700; }
.scale-board { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.scale-btn {
 min-height: 42px; padding: 0 16px; border-radius: 999px;
 background: rgba(255,255,255,.04); border: 1px solid var(--line); color: var(--text); font-size: 14px;
}
.scale-btn:hover { border-color: var(--cyan); }
.scale-btn.is-on { border-color: rgba(232,163,23,.75); box-shadow: inset 3px 0 0 var(--amber); }
.ruler { margin-top: 22px; height: 8px; border-radius: 999px; background: rgba(255,255,255,.06); position: relative; overflow: hidden; }
.ruler i { position: absolute; top: 0; bottom: 0; width: 1px; background: rgba(61,220,255,.8); }
.long-list { display: flex; flex-direction: column; gap: 16px; margin-top: 28px; }
.long-row {
 display: grid; grid-template-columns: 108px minmax(0,1fr) 84px; gap: 16px; align-items: center;
 padding: 16px 18px;
}
.long-row:hover { border-color: rgba(61,220,255,.45); }
.dur { color: var(--muted); font-size: 13px; }
.dur .num { display: block; color: var(--text); font-size: 28px; line-height: 1; }
.mid h3 { font-size: 18px; }
.mid p { margin-top: 6px; color: var(--muted); font-size: 14px; }
.track { margin-top: 10px; height: 4px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; }
.track span { display: block; height: 100%; background: linear-gradient(90deg, #14556e, var(--cyan)); }
.q { justify-self: end; }
.resume-strip, .rest-strip, .more-bar { padding: 22px 24px; }
.resume-grid, .more-grid { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.rest-strip p { font-size: 18px; }
.article-list { margin-top: 22px; display: flex; flex-direction: column; }
.article-list a {
 display: grid; grid-template-columns: 120px minmax(0,1fr); gap: 12px; align-items: center;
 padding: 16px 4px; border-bottom: 1px solid rgba(255,255,255,.08); color: var(--text);
}
.article-list a:hover { color: var(--cyan); }
.article-list .date { color: var(--muted); font-size: 14px; }
.faq { margin-top: 18px; display: grid; gap: 10px; }
.faq details { padding: 0 16px; }
.faq summary { cursor: pointer; min-height: 52px; display: flex; align-items: center; justify-content: space-between; gap: 12px; list-style: none; font-weight: 650; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--cyan); font-size: 22px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 14px; color: var(--muted); }
.stat-line { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 16px; color: var(--muted); font-size: 13px; }
.stat-line b { color: var(--text); font-weight: 680; }
.more-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.site-footer { padding: 36px 0 48px; border-top: 1px solid rgba(61,220,255,.18); background: rgba(5,8,15,.72); }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px 18px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--cyan); }
.fine { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
@media (max-width: 1023px) {
 h1 { font-size: 40px; }
 h2 { font-size: 30px; }
 .head-grid, .resume-grid, .more-grid { grid-template-columns: 1fr; display: grid; }
}
@media (max-width: 767px) {
 :root { --pad: 48px; --gap: 16px; }
 h1 { font-size: 30px; }
 h2 { font-size: 24px; }
 .long-row { grid-template-columns: 76px minmax(0,1fr); }
 .q { grid-column: 2; justify-self: start; }
 .dur .num { font-size: 22px; }
 .drawer-link { font-size: 30px; }
 .footer-inner { flex-direction: column; }
}
@media (max-width: 639px) {
 .glass, .site-header, .drawer-mask { backdrop-filter: none; }
 .glass { box-shadow: 0 8px 18px rgba(8,20,40,.28); }
 .article-list a { grid-template-columns: 1fr; gap: 2px; }
 .legend-scale { grid-template-columns: repeat(2, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
 html { scroll-behavior: auto; }
 *, *::before, *::after { transition: none !important; animation: none !important; }
 .btn-primary:hover, .btn-ghost:hover { transform: none; }
}

/* roulang page: category1 */
:root {
  --bg: #05080F;
  --panel: #07111F;
  --panel-2: #0E2A4A;
  --cyan: #3DDCFF;
  --amber: #E8A317;
  --text: #F4F7FB;
  --muted: #9FB0C7;
  --line: rgba(255,255,255,.15);
  --glass: rgba(255,255,255,.1);
  --radius: 18px;
  --shadow: 0 20px 50px rgba(8,20,40,.45);
  --pad: 88px;
  --gap: 24px;
  --header: 64px;
}
/* roulang page: category1 */
html { scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--text);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background:
    radial-gradient(1000px 480px at 80% -10%, rgba(14,42,74,.9), transparent 60%),
    radial-gradient(800px 420px at -10% 20%, rgba(14,42,74,.55), transparent 55%),
    var(--bg);
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
button, input { font-family: inherit; }
a { color: inherit; text-decoration: none; }
p { margin: 0; color: var(--muted); }
h1, h2, h3 { color: var(--text); font-weight: 720; letter-spacing: 0; }
h1 { margin: 0; font-size: 30px; line-height: 1.25; }
h2 { margin: 0 0 12px; font-size: 24px; line-height: 1.35; }
h3 { margin: 14px 0 8px; font-size: 18px; line-height: 1.5; }
body .container { width: min(1120px, calc(100% - 32px)); max-width: none; margin: 0 auto; padding: 0; }
.num { font-family: ui-monospace, "Cascadia Mono", "Sarasa Mono SC", "PingFang SC", monospace; font-variant-numeric: tabular-nums; }
.site-header {
  position: sticky; top: 0; z-index: 40; height: var(--header);
  display: flex; align-items: center;
  background: rgba(5,8,15,.9);
  border-bottom: 1px solid rgba(61,220,255,.18);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.brand { display: flex; flex-direction: column; line-height: 1.15; color: var(--text); font-weight: 760; font-size: 15px; }
.brand span:last-child { color: var(--cyan); font-size: 12px; letter-spacing: .12em; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn, .btn, .chip {
  border: 0; cursor: pointer; color: var(--text);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease, border-color .2s ease;
}
.icon-btn {
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.icon-btn span { display: block; width: 18px; height: 1.5px; background: var(--text); }
.icon-btn:hover, .chip:hover { border-color: var(--cyan); }
.icon-btn:focus-visible, .btn:focus-visible, .chip:focus-visible, .drawer-link:focus-visible, .faq summary:focus-visible, .article-row:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 999px; font-size: 15px; font-weight: 650;
  white-space: nowrap;
}
.btn-primary {
  background: #0c3a52;
  box-shadow: inset 0 0 0 1px var(--cyan), 0 0 16px rgba(232,163,23,.28), 0 0 22px rgba(61,220,255,.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: inset 0 0 0 1px var(--cyan), 0 0 22px rgba(232,163,23,.45), 0 0 28px rgba(61,220,255,.38); }
.btn-primary:active { transform: none; filter: brightness(.88); }
.btn-ghost { background: transparent; box-shadow: inset 0 0 0 1px rgba(255,255,255,.28); }
.btn-ghost:hover { box-shadow: inset 0 0 0 1px var(--cyan); transform: translateY(-2px); }
.btn-ghost:active { transform: none; filter: brightness(.9); }
.btn:disabled { cursor: not-allowed; filter: brightness(.72); transform: none; box-shadow: inset 0 0 0 1px rgba(255,255,255,.2); }
.drawer { position: fixed; inset: 0; z-index: 60; display: none; }
.drawer.open { display: block; }
.drawer-mask { position: absolute; inset: 0; background: rgba(5,8,15,.92); backdrop-filter: blur(10px); }
.drawer-panel {
  position: absolute; top: 0; right: 0; height: 100%; width: min(520px, 100%);
  padding: 28px 28px 40px;
  background: linear-gradient(180deg, rgba(7,17,31,.96), rgba(5,8,15,.96));
  border-left: 1px solid rgba(61,220,255,.25);
  display: flex; flex-direction: column; gap: 8px;
}
.drawer-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; color: var(--text); }
.drawer-link {
  display: block; font-size: 32px; line-height: 1.35; padding: 10px 0 10px 14px;
  border-left: 3px solid transparent; color: var(--text);
}
.drawer-link:hover { color: var(--cyan); }
.drawer-link.is-current { border-left-color: var(--amber); color: var(--text); }
body.lock { overflow: hidden; }
.section { padding: 48px 0; position: relative; }
.section-b {
  background: linear-gradient(180deg, rgba(7,17,31,.72), rgba(14,42,74,.28));
  border-top: 1px solid rgba(255,255,255,.08);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.section-line { background-image: linear-gradient(rgba(255,255,255,.08), rgba(255,255,255,.08)); background-size: 100% 1px; background-repeat: no-repeat; background-position: left bottom; }
.cat-head-grid, .quality-grid, .more-bar { display: grid; gap: var(--gap); }
.lead { margin-top: 12px; max-width: 40em; font-size: 17px; color: var(--muted); }
.head-side { display: grid; gap: 12px; align-content: end; }
.result-line { color: var(--text); font-size: 18px; }
.result-line span { color: var(--cyan); font-size: 28px; }
.sort-row, .filter-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.filter-line { display: grid; gap: 16px; margin-top: 22px; }
.filter-label { color: var(--muted); min-width: 4em; font-size: 14px; }
.chip {
  min-height: 36px; padding: 0 14px; border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.15);
  color: var(--text); font-size: 14px;
}
.chip.is-on { border-color: rgba(232,163,23,.85); box-shadow: inset 3px 0 0 var(--amber); color: var(--text); }
.glass, .cover-card, .note-card, .faq details, .cta-strip {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.cover-grid { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 28px; }
.cover-card { padding: 16px; }
.cover-card:hover { transform: translateY(-2px); border-color: rgba(61,220,255,.55); }
.cover {
  position: relative; height: 176px; border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(61,220,255,.35);
  background: linear-gradient(145deg, #0E2A4A, #07111F 72%);
}
.cover.c2 { background: linear-gradient(160deg, #12324f, #07111F 68%); }
.cover.c3 { background: linear-gradient(200deg, #0c3a52, #05080F 70%); }
.cover.c4 { background: linear-gradient(120deg, #16415f, #07111F 74%); }
.cover-badges { position: absolute; top: 12px; left: 12px; display: flex; gap: 6px; }
.badge {
  display: inline-flex; align-items: center; min-height: 26px; padding: 0 10px;
  border-radius: 999px; border: 1px solid rgba(61,220,255,.45); color: var(--cyan); font-size: 12px;
  background: rgba(5,8,15,.45);
}
.badge-amber { color: var(--amber); border-color: rgba(232,163,23,.7); }
.time-tag { position: absolute; right: 12px; bottom: 16px; color: var(--text); font-size: 13px; }
.progress { position: absolute; left: 0; bottom: 0; height: 2px; background: linear-gradient(90deg, var(--cyan), rgba(61,220,255,.15)); }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: 8px; color: var(--muted); font-size: 13px; }
.card-copy { color: var(--text); font-size: 15px; }
.note-card { margin-top: 22px; padding: 22px; }
.scale { margin-top: 16px; height: 2px; background: rgba(255,255,255,.08); position: relative; }
.scale i { display: block; height: 2px; background: var(--cyan); }
.scale-labels { display: flex; justify-content: space-between; margin-top: 8px; color: var(--muted); font-size: 13px; }
.quality-grid { margin-top: 8px; align-items: stretch; }
.stat-list { display: grid; gap: 12px; }
.stat-item { padding: 16px 18px; }
.stat-item b { display: block; color: var(--text); font-size: 28px; line-height: 1.2; }
.meter { margin-top: 14px; height: 2px; background: rgba(255,255,255,.08); }
.meter i { display: block; height: 2px; background: var(--cyan); }
.article-list { margin-top: 18px; display: grid; }
.article-row {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 12px; align-items: center;
  padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,.08); color: var(--text);
}
.article-row time { color: var(--muted); font-size: 13px; }
.article-row:hover { color: var(--cyan); }
.faq { margin-top: 18px; display: grid; gap: 10px; }
.faq details { padding: 0 16px; }
.faq summary {
  cursor: pointer; min-height: 52px; display: flex; align-items: center; justify-content: space-between;
  list-style: none; font-weight: 650; color: var(--text); gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--cyan); font-size: 22px; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 14px; }
.more-grid { margin-bottom: 18px; }
.more-bar { align-items: center; }
.more-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.empty-note { margin-top: 16px; color: var(--muted); }
.cta-strip { padding: 22px; }
.site-footer { padding: 36px 0 48px; border-top: 1px solid rgba(61,220,255,.18); background: #05080F; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px 18px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--cyan); }
.fine { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
.hair { height: 1px; background: rgba(255,255,255,.08); border: 0; margin: 18px 0 0; }
@media (min-width: 768px) {
  .cover-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .cover-card.is-offset { margin-top: 36px; }
  .quality-grid { grid-template-columns: 1.25fr .75fr; }
}
@media (min-width: 1024px) {
  body { font-size: 17px; }
  h1 { font-size: 52px; }
  h2 { font-size: 36px; }
  .lead { font-size: 18px; }
  .section { padding: 88px 0; }
  .cat-head-grid { grid-template-columns: 1.45fr .7fr; align-items: end; }
  .cover-grid { grid-template-columns: 1.15fr .85fr; }
  .more-bar { grid-template-columns: 1.3fr .7fr; }
}
@media (max-width: 768px) {
  :root { --pad: 48px; --gap: 16px; }
  .glass, .cover-card, .note-card, .faq details, .cta-strip, .site-header, .drawer-mask { backdrop-filter: blur(6px); }
  .cover-card, .note-card, .cta-strip { box-shadow: 0 8px 20px rgba(8,20,40,.28); }
  .drawer-link { font-size: 30px; }
}
@media (max-width: 640px) {
  .section { padding: 44px 0; }
  .article-row { grid-template-columns: 1fr; gap: 4px; }
  .result-line span { font-size: 24px; }
}
@media (max-width: 520px) {
  .section { padding: 40px 0; }
  .btn-head { padding: 0 12px; font-size: 13px; }
  .brand { font-size: 14px; }
  h1 { font-size: 30px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .btn-primary:hover, .btn-ghost:hover, .cover-card:hover { transform: none; }
}