/* roulang page: index */
:root {
  --bg: #F3F6FA;
  --surface: #FFFFFF;
  --ink: #1C2430;
  --muted: #5C6B7A;
  --primary: #1E4E8C;
  --primary-hover: #173E70;
  --accent: #E7A23A;
  --line: rgba(30,78,140,.10);
  --shadow: 0 10px 30px rgba(30,78,140,.08);
  --shadow-hover: 0 16px 36px rgba(30,78,140,.16);
  --radius: 16px;
  --container: 1120px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  padding-bottom: 88px;
}
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
h1, h2, h3 { line-height: 1.3; margin: 0 0 12px; font-weight: 700; color: var(--ink); }
h1 { font-size: clamp(36px, 4.6vw, 48px); letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 3vw, 32px); letter-spacing: -0.02em; }
h3 { font-size: 18px; }
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: 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;
  background: #F7F9FC;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; flex: 0 0 auto; }
.brand:hover { text-decoration: none; color: var(--primary); }
.brand-mark {
  width: 36px; height: 36px; border-radius: 12px;
  background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 700;
}
.brand-name { font-weight: 700; font-size: 16px; letter-spacing: -0.01em; }
.nav-collapse { margin-left: auto; }
.nav-burger {
  display: none;
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 8px 12px;
  font-weight: 600;
  color: var(--primary);
}
.nav-burger::-webkit-details-marker { display: none; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-flex; align-items: center;
  padding: 8px 12px; border-radius: 10px;
  color: var(--ink); font-weight: 600; font-size: 15px;
}
.nav-link:hover { background: rgba(30,78,140,.06); text-decoration: none; color: var(--primary); }
.nav-link.is-active { color: var(--primary); background: rgba(30,78,140,.08); }
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop > details { position: static; }
.chevron {
  list-style: none; cursor: pointer;
  width: 28px; height: 28px; border-radius: 8px;
  display: grid; place-items: center; color: var(--muted);
}
.chevron::-webkit-details-marker { display: none; }
.chevron:hover, .nav-drop:hover .chevron { background: rgba(30,78,140,.06); color: var(--primary); }
.drop-panel {
  position: absolute; top: calc(100% + 10px); left: 0;
  width: 280px; padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: none;
  z-index: 30;
}
.nav-drop:hover .drop-panel,
.nav-drop:focus-within .drop-panel,
.nav-drop details[open] .drop-panel { display: block; }
.drop-label { margin: 8px 0 6px; font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: .04em; }
.drop-panel a { display: block; padding: 7px 8px; border-radius: 8px; font-size: 14px; color: var(--ink); }
.drop-panel a:hover { background: rgba(30,78,140,.06); color: var(--primary); text-decoration: none; }
.header-cta { flex: 0 0 auto; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 16px; border-radius: 12px;
  border: 1px solid transparent; font-weight: 700; font-size: 15px;
  cursor: pointer; transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(30,78,140,.18); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--primary); border-color: rgba(30,78,140,.35); }
.btn-ghost:hover { background: #F4F8FC; color: var(--primary-hover); }
.band { padding: 72px 0; }
.band-alt { background: #EAF0F6; }
.band-tight { padding: 36px 0; }
.band-hero { padding: 48px 0 64px; background: var(--bg); }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head p, .lead { color: var(--muted); font-size: 16px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 36px; align-items: center; }
.hero-copy { display: flex; flex-direction: column; }
.subhead { font-size: 18px; color: var(--ink); margin: 8px 0 14px; font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 0; }
.stat-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 18px; }
.stat {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); padding: 12px 14px;
}
.stat b { display: block; font-size: 26px; color: var(--primary); line-height: 1.2; }
.stat span { color: var(--muted); font-size: 13px; font-weight: 600; }
.hero-stage { position: relative; min-height: 430px; }
.stack-back, .stack-front { position: absolute; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); background: #fff; }
.stack-back { width: 78%; right: 0; top: 12px; transform: rotate(2.5deg); }
.stack-front { width: 84%; left: 0; bottom: 8px; }
.frame { position: relative; aspect-ratio: 16/9; background: #1E4E8C; overflow: hidden; border-radius: var(--radius); }
.frame svg { width: 100%; height: 100%; }
.frame-cap {
  position: absolute; left: 14px; right: 14px; bottom: 12px;
  color: #fff; font-weight: 700; text-shadow: 0 1px 2px rgba(0,0,0,.25);
}
.badge {
  display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px;
  border-radius: 999px; background: var(--accent); color: #1C2430;
  font-size: 12px; font-weight: 600; letter-spacing: .02em;
}
.badge-abs { position: absolute; top: 12px; left: 12px; }
.sell-grid { display: grid; grid-template-columns: 1.35fr .9fr; gap: 16px; }
.sell-stack { display: grid; gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card p { color: var(--muted); font-size: 15px; }
.card-wide { min-height: 100%; background: linear-gradient(180deg, #fff 0%, #F7FAFD 100%); }
.kicker { color: var(--primary); font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.timeline {
  display: flex; gap: 14px; overflow-x: auto; padding: 4px 2px 12px;
  scroll-snap-type: x mandatory;
}
.time-card { min-width: 250px; scroll-snap-align: start; position: relative; }
.time-card time { display: block; color: var(--primary); font-weight: 700; font-size: 14px; margin-bottom: 8px; }
.time-card h3 { font-size: 16px; min-height: 52px; }
.time-card a { font-weight: 700; }
.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.device { padding: 0; overflow: hidden; }
.device-top {
  height: 34px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 6px; padding: 0 12px; background: #F8FBFE;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #D5DEE8; }
.dot:first-child { background: var(--accent); }
.step-no {
  width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(30,78,140,.08); color: var(--primary); font-weight: 800; margin-bottom: 10px;
}
.device .pad { padding: 16px; }
.entry-grid { display: grid; grid-template-columns: 1.45fr .8fr; gap: 16px; }
.entry-large { min-height: 280px; display: flex; flex-direction: column; justify-content: space-between; }
.entry-small { display: flex; flex-direction: column; justify-content: space-between; }
.voice-layout { display: grid; grid-template-columns: 1.4fr .6fr; gap: 16px; }
.voice-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.quote { font-size: 15px; color: var(--ink); }
.who { color: var(--muted); font-size: 13px; font-weight: 600; margin-top: 8px; }
.sum-card { background: var(--primary); color: #fff; display: flex; flex-direction: column; justify-content: flex-end; }
.sum-card b { font-size: 42px; line-height: 1; display: block; margin-bottom: 8px; }
.sum-card p { color: rgba(255,255,255,.88); }
.mosaic { display: grid; grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: 180px 180px; gap: 14px; }
.tile { position: relative; display: block; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #173E70; }
.tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); text-decoration: none; }
.tile-big { grid-row: 1 / span 2; grid-column: 1; }
.tile .frame { height: 100%; border-radius: 0; aspect-ratio: auto; }
.tile-name { position: absolute; left: 12px; right: 12px; bottom: 12px; color: #fff; font-weight: 700; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cmp-row { display: grid; grid-template-columns: 72px 1fr; gap: 10px; padding: 12px 0; border-top: 1px solid var(--line); }
.cmp-row strong { color: var(--primary); font-size: 14px; }
.cmp-row p { margin: 0; color: var(--muted); font-size: 15px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.note-list { display: grid; gap: 12px; }
.note {
  display: grid; grid-template-columns: 96px 1fr auto; gap: 14px; align-items: center;
}
.note time { color: var(--primary); font-weight: 700; font-size: 14px; }
.rail {
  position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px;
  box-shadow: var(--shadow); padding: 28px 22px 22px;
}
.rail::before {
  content: ""; position: absolute; left: 8%; right: 8%; top: 46px; height: 2px; background: rgba(30,78,140,.16);
}
.rail article { position: relative; padding-top: 8px; }
.rail-dot {
  width: 14px; height: 14px; border-radius: 50%; background: var(--accent);
  border: 3px solid #fff; box-shadow: 0 0 0 1px rgba(30,78,140,.2); margin-bottom: 18px;
}
.faq details {
  background: #F7F9FC; border-bottom: 1px solid var(--line); padding: 0 16px;
}
.faq details[open] { background: #fff; border-left: 3px solid var(--primary); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 0; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--muted); padding-bottom: 14px; }
.assure-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.assure-item { display: flex; gap: 12px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.ico {
  width: 40px; height: 40px; border-radius: 12px; flex: 0 0 auto;
  display: grid; place-items: center; background: rgba(30,78,140,.08); color: var(--primary);
}
.pick-list { display: grid; gap: 14px; }
.pick { display: grid; grid-template-columns: 1fr 240px; gap: 18px; align-items: center; }
.pick h3 { margin-bottom: 6px; }
.meta-line { color: var(--muted); font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.close-band {
  background: #E7EEF6; border: 1px solid var(--line); border-radius: 20px;
  padding: 28px; display: flex; justify-content: space-between; gap: 18px; align-items: center;
}
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 40px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 24px; }
.footer-brand { font-weight: 800; font-size: 18px; margin-bottom: 8px; }
.foot-links { display: grid; gap: 6px; }
.foot-links a { color: var(--ink); font-weight: 600; }
.foot-links a:hover { color: var(--primary); }
.search-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-top: 10px; }
.search-form input {
  width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 12px;
  padding: 10px 12px; min-height: 44px;
}
.copy { margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  background: rgba(255,255,255,.98); border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(30,78,140,.08);
}
.dock-inner { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.dock strong { font-size: 15px; }
@media (max-width: 1024px) {
  .nav-burger { display: inline-flex; }
  .nav-collapse { width: 100%; margin-left: 0; order: 4; }
  .header-inner { flex-wrap: wrap; padding: 10px 0; }
  .header-cta { margin-left: auto; }
  .nav-collapse:not([open]) > .nav-list { display: none; }
  .nav-list { flex-direction: column; align-items: stretch; padding-bottom: 12px; }
  .drop-panel, .nav-drop:hover .drop-panel, .nav-drop:focus-within .drop-panel {
    position: static; width: auto; display: none; box-shadow: none; border: 0; padding: 0 0 8px 12px;
  }
  .nav-drop details[open] .drop-panel { display: block; }
  .hero-grid, .sell-grid, .entry-grid, .voice-layout, .compare, .footer-grid { grid-template-columns: 1fr; }
  .mosaic { grid-template-columns: 1fr 1fr; grid-template-rows: 200px 160px 160px; }
  .tile-big { grid-column: 1 / span 2; grid-row: auto; min-height: 200px; }
  .step-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .nav-collapse > .nav-list { display: flex !important; }
}
@media (max-width: 768px) {
  .band { padding: 52px 0; }
  .stat-row, .assure-row, .rail { grid-template-columns: 1fr; }
  .rail::before { display: none; }
  .note, .pick, .close-band, .search-form { grid-template-columns: 1fr; }
  .mosaic { grid-template-columns: 1fr; grid-template-rows: none; }
  .tile-big { grid-column: auto; }
  .tile { min-height: 180px; }
  .hero-stage { min-height: 250px; }
  .stack-back { display: none; }
  .stack-front { position: relative; width: 100%; left: auto; bottom: auto; }
}
@media (max-width: 640px) {
  .container { width: min(var(--container), calc(100% - 32px)); }
  .step-grid { grid-template-columns: 1fr; }
  .hero-title { order: 1; }
  .hero-actions { order: 2; }
  .stat-row { order: 3; }
  .hero-lead { order: 4; }
  .dock-inner { width: 100%; }
  h1 { font-size: 34px; }
}
@media (min-width: 1280px) {
  .container { width: min(1120px, calc(100% - 48px)); }
}

/* roulang page: category2 */
:root {
 --bg: #F3F6FA;
 --surface: #FFFFFF;
 --ink: #1C2430;
 --muted: #5C6B7A;
 --primary: #1E4E8C;
 --primary-hover: #173E70;
 --accent: #E7A23A;
 --line: rgba(30,78,140,.10);
 --shadow: 0 10px 30px rgba(30,78,140,.08);
 --shadow-hover: 0 16px 36px rgba(30,78,140,.16);
 --radius: 16px;
 --container: 1120px;
}
/* roulang page: category2 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
 margin: 0;
 background: var(--bg);
 color: var(--ink);
 font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
 font-size: 17px;
 line-height: 1.75;
 padding-bottom: 0;
}
img, svg { display: block; max-width: 100%; }
button, input, summary { font: inherit; color: inherit; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
 outline: 2px solid var(--primary);
 outline-offset: 2px;
}
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.site-header {
 position: sticky; top: 0; z-index: 40;
 background: #F7F9FC;
 border-bottom: 1px solid var(--line);
}
.header-inner {
 min-height: 74px;
 display: flex;
 align-items: center;
 gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; flex: 0 0 auto; }
.brand:hover { text-decoration: none; color: var(--primary); }
.brand-mark {
 width: 36px; height: 36px; border-radius: 12px;
 background: var(--primary); color: #fff;
 display: grid; place-items: center; font-weight: 700;
}
.brand-name { font-weight: 700; font-size: 16px; letter-spacing: -0.01em; }
.nav-collapse { margin-left: auto; }
.nav-burger {
 display: none;
 list-style: none;
 cursor: pointer;
 border: 1px solid var(--line);
 background: var(--surface);
 border-radius: 12px;
 padding: 8px 12px;
 font-weight: 600;
 color: var(--primary);
}
.nav-burger::-webkit-details-marker { display: none; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
 display: inline-flex; align-items: center;
 padding: 8px 12px; border-radius: 10px;
 color: var(--ink); font-weight: 600; font-size: 15px;
}
.nav-link:hover { background: rgba(30,78,140,.06); text-decoration: none; color: var(--primary); }
.nav-link.is-active { color: var(--primary); background: rgba(30,78,140,.08); }
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop > details { position: static; }
.chevron {
 list-style: none;
 cursor: pointer;
 border: 0;
 background: transparent;
 color: var(--muted);
 border-radius: 8px;
 padding: 6px 8px;
 font-size: 12px;
}
.chevron::-webkit-details-marker { display: none; }
.chevron:hover, .nav-drop:hover .chevron { background: rgba(30,78,140,.06); color: var(--primary); }
.drop-panel {
 display: none;
 position: absolute;
 top: calc(100% + 8px);
 left: 0;
 width: 240px;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: 16px;
 box-shadow: var(--shadow);
 padding: 12px;
 z-index: 50;
}
.nav-drop:hover .drop-panel,
.nav-drop:focus-within .drop-panel,
.nav-drop details[open] .drop-panel { display: block; }
.drop-label { margin: 8px 8px 4px; font-size: 12px; font-weight: 700; color: var(--muted); }
.drop-panel a { display: block; padding: 7px 8px; border-radius: 8px; font-size: 14px; color: var(--ink); }
.drop-panel a:hover { background: rgba(30,78,140,.06); color: var(--primary); text-decoration: none; }
.header-cta { flex: 0 0 auto; }
.btn {
 display: inline-flex; align-items: center; justify-content: center;
 min-height: 44px; padding: 0 16px; border-radius: 12px;
 border: 1px solid transparent; font-weight: 700; font-size: 15px;
 cursor: pointer; transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
 text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(30,78,140,.18); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--primary); border-color: rgba(30,78,140,.35); }
.btn-ghost:hover { background: #F4F8FC; color: var(--primary-hover); }
.badge {
 display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px;
 border-radius: 999px; background: var(--accent); color: #1C2430;
 font-size: 12px; font-weight: 600; letter-spacing: .02em;
}
.badge-abs { position: absolute; top: 12px; left: 12px; }
.card {
 background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
 box-shadow: var(--shadow); padding: 22px;
 transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card p { color: var(--muted); font-size: 15px; }
.faq details { background: #F7F9FC; border-bottom: 1px solid var(--line); padding: 0 16px; }
.faq details[open] { background: #fff; border-left: 3px solid var(--primary); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 0; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--muted); padding-bottom: 14px; }
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr 1fr; gap: 28px; }
.footer-brand { font-weight: 700; font-size: 18px; margin: 0 0 8px; }
.site-footer p { color: var(--muted); font-size: 15px; }
.foot-links { display: flex; flex-direction: column; gap: 8px; }
.foot-links a { color: var(--ink); font-weight: 600; }
.foot-links a:hover { color: var(--primary); }
.site-footer h3 { font-size: 16px; margin-bottom: 12px; }
.search-form { display: flex; gap: 8px; margin-top: 14px; }
.search-form input {
 flex: 1; min-width: 0; min-height: 44px; border-radius: 12px;
 border: 1px solid var(--line); padding: 0 12px; background: #F7F9FC;
}
.search-form input:focus { border-color: var(--primary); background: #fff; }
.copy { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.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;
}
.band { padding: 56px 0; }
.band-plain { background: var(--bg); }
.band-alt { background: #fff; }
.band-soft { background: #EAF0F7; }
.band-head { padding: 36px 0 28px; }
.head-split { display: grid; grid-template-columns: 1.35fr .78fr; gap: 28px; align-items: end; }
.eyebrow { color: var(--primary); font-size: 14px; font-weight: 700; margin-bottom: 8px; }
h1 { font-size: clamp(32px, 4vw, 46px); line-height: 1.25; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 3vw, 32px); line-height: 1.3; font-weight: 800; letter-spacing: -0.02em; }
h3 { font-size: 18px; line-height: 1.45; font-weight: 700; }
.lead { color: var(--muted); font-size: 16px; margin-top: 12px; max-width: 640px; }
.filter-sum { padding: 18px 20px; }
.filter-sum h2 { font-size: 18px; margin-bottom: 10px; }
.filter-sum li {
 display: flex; justify-content: space-between; gap: 12px;
 padding: 8px 0; border-top: 1px solid var(--line);
 font-size: 15px;
}
.filter-sum li span { color: var(--muted); }
.list-split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 22px; align-items: stretch; }
.cover-main { padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.cover-frame { position: relative; border-radius: 16px; overflow: hidden; background: #d9e3ef; }
.cover-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 16px; }
.cover-main h3 { font-size: 22px; }
.cover-meta { color: var(--muted); font-size: 14px; }
.entry-panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 8px 18px 12px; }
.text-row {
 display: grid; grid-template-columns: auto 1fr auto; gap: 8px 12px; align-items: center;
 padding: 13px 4px; border-top: 1px solid var(--line); color: var(--ink);
}
.entry-panel .text-row:first-child { border-top: 0; }
.text-row:hover { color: var(--primary); text-decoration: none; background: #F7FAFD; }
.row-title { font-weight: 700; font-size: 16px; }
.row-meta { color: var(--muted); font-size: 13px; white-space: nowrap; }
.section-kicker { color: var(--muted); font-size: 15px; margin: 8px 0 22px; max-width: 720px; }
.rank-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.rank-item { padding: 16px; min-height: 148px; display: flex; flex-direction: column; justify-content: space-between; }
.rank-no { color: var(--accent); font-size: 28px; font-weight: 800; line-height: 1; }
.rank-item span { color: var(--muted); font-size: 13px; }
.rank-item:hover { text-decoration: none; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.chip {
 display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px;
 border-radius: 999px; background: rgba(30,78,140,.08); color: var(--primary);
 font-size: 13px; font-weight: 600;
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.point h3 { margin-bottom: 8px; }
.point p { color: var(--muted); font-size: 15px; }
.scene-track {
 display: grid; grid-template-columns: 1fr 1fr;
 background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
 box-shadow: var(--shadow); overflow: hidden;
}
.scene-cell { padding: 22px 24px; }
.scene-cell + .scene-cell { border-left: 1px solid var(--line); }
.scene-index { color: var(--accent); font-weight: 800; font-size: 13px; letter-spacing: .08em; }
.scene-cell p { color: var(--muted); margin-top: 8px; font-size: 15px; }
.note-panel { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.note-row {
 display: grid; grid-template-columns: 92px 1fr auto; gap: 12px; align-items: center;
 padding: 16px 18px; border-top: 1px solid var(--line); color: var(--ink);
}
.note-panel .note-row:first-child { border-top: 0; }
.note-row time { color: var(--primary); font-weight: 700; font-size: 14px; }
.note-row:hover { text-decoration: none; background: #F7FAFD; color: var(--primary); }
.note-go { font-size: 13px; font-weight: 700; color: var(--primary); }
.compat-bar { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.compat-item { display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: start; }
.compat-icon {
 width: 48px; height: 48px; border-radius: 14px; background: rgba(30,78,140,.08);
 display: grid; place-items: center;
}
.compat-item p { color: var(--muted); font-size: 15px; margin-top: 4px; }
.more-line {
 display: flex; align-items: center; justify-content: space-between; gap: 16px;
 background: #fff; border: 1px solid var(--line); border-radius: 16px;
 box-shadow: var(--shadow); padding: 18px 20px;
}
.more-line p { color: var(--muted); }
@media (min-width: 1024px) {
 .nav-collapse:not([open]) > .nav-list,
 .nav-collapse[open] > .nav-list { display: flex; }
 .nav-burger { display: none; }
}
@media (max-width: 1023px) {
 .header-inner { flex-wrap: wrap; padding: 10px 0; }
 .header-cta { margin-left: auto; }
 .nav-collapse { width: 100%; margin-left: 0; }
 .nav-burger { display: inline-flex; }
 .nav-list { display: none; flex-direction: column; align-items: stretch; gap: 2px; padding-bottom: 12px; }
 .nav-collapse[open] > .nav-list { display: flex; }
 .nav-drop { flex-direction: column; align-items: stretch; }
 .drop-panel { position: static; width: auto; box-shadow: none; margin: 0 0 8px 12px; }
 .nav-drop:hover .drop-panel { display: none; }
 .nav-drop details[open] .drop-panel { display: block; }
 .head-split, .list-split, .two-col, .scene-track, .compat-bar, .footer-grid { grid-template-columns: 1fr; }
 .scene-cell + .scene-cell { border-left: 0; border-top: 1px solid var(--line); }
 .rank-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
 .band { padding: 40px 0; }
 .rank-row { grid-template-columns: 1fr 1fr; }
 .text-row, .note-row { grid-template-columns: auto 1fr; }
 .row-meta, .note-go { grid-column: 2; }
 .more-line { flex-direction: column; align-items: stretch; }
}
@media (max-width: 520px) {
 .container { width: min(var(--container), calc(100% - 32px)); }
 .brand-name { font-size: 14px; }
 .rank-row, .compat-bar { grid-template-columns: 1fr; }
 .search-form { flex-direction: column; }
 .header-cta { min-height: 40px; padding: 0 12px; }
}
@media (min-width: 1280px) {
 .container { width: min(var(--container), calc(100% - 48px)); }
}

/* roulang page: category1 */
:root {
 --bg: #F3F6FA;
 --surface: #FFFFFF;
 --ink: #1C2430;
 --muted: #5C6B7A;
 --primary: #1E4E8C;
 --primary-hover: #173E70;
 --accent: #E7A23A;
 --line: rgba(30,78,140,.10);
 --shadow: 0 10px 30px rgba(30,78,140,.08);
 --shadow-hover: 0 16px 36px rgba(30,78,140,.16);
 --radius: 16px;
 --container: 1120px;
}
/* roulang page: category1 */
html { scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: border-box; }
body {
 margin: 0;
 background: var(--bg);
 color: var(--ink);
 font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
 font-size: 17px;
 line-height: 1.75;
}
body.page-updates { padding-bottom: 0; }
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
 outline: 2px solid var(--primary);
 outline-offset: 2px;
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: 42px; line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 12px; }
h2 { font-size: 30px; line-height: 1.35; margin-bottom: 12px; }
h3 { font-size: 18px; line-height: 1.45; margin-bottom: 8px; }
p { margin-bottom: 10px; }
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.site-header {
 position: sticky; top: 0; z-index: 40;
 background: #F7F9FC;
 border-bottom: 1px solid var(--line);
}
.header-inner {
 min-height: 74px;
 display: flex;
 align-items: center;
 gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; flex: 0 0 auto; }
.brand:hover { text-decoration: none; color: var(--primary); }
.brand-mark {
 width: 36px; height: 36px; border-radius: 12px;
 background: var(--primary); color: #fff;
 display: grid; place-items: center; font-weight: 700;
}
.brand-name { font-weight: 700; font-size: 16px; letter-spacing: -0.01em; }
.nav-collapse { margin-left: auto; }
.nav-burger {
 display: none;
 list-style: none;
 cursor: pointer;
 border: 1px solid var(--line);
 background: var(--surface);
 border-radius: 12px;
 padding: 8px 12px;
 font-weight: 600;
 color: var(--primary);
}
.nav-burger::-webkit-details-marker { display: none; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
 display: inline-flex; align-items: center;
 padding: 8px 12px; border-radius: 10px;
 color: var(--ink); font-weight: 600; font-size: 15px;
}
.nav-link:hover { background: rgba(30,78,140,.06); text-decoration: none; color: var(--primary); }
.nav-link.is-active { color: var(--primary); background: rgba(30,78,140,.08); }
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop > details { position: static; }
.chevron {
 list-style: none;
 cursor: pointer;
 border: 0;
 background: transparent;
 color: var(--muted);
 border-radius: 8px;
 padding: 8px 6px;
 font-weight: 700;
}
.chevron::-webkit-details-marker { display: none; }
.chevron:hover, .nav-drop:hover .chevron { background: rgba(30,78,140,.06); color: var(--primary); }
.drop-panel {
 display: none;
 position: absolute;
 top: calc(100% + 8px);
 left: 0;
 min-width: 220px;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: 12px;
 box-shadow: var(--shadow);
 padding: 10px;
 z-index: 50;
}
.nav-drop:hover .drop-panel,
.nav-drop:focus-within .drop-panel,
.nav-drop details[open] .drop-panel { display: block; }
.drop-panel a { display: block; padding: 7px 8px; border-radius: 8px; font-size: 14px; color: var(--ink); }
.drop-panel a:hover { background: rgba(30,78,140,.06); color: var(--primary); text-decoration: none; }
.drop-label { margin: 6px 8px 2px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.header-cta { flex: 0 0 auto; }
.btn {
 display: inline-flex; align-items: center; justify-content: center;
 min-height: 44px; padding: 0 16px; border-radius: 12px;
 border: 1px solid transparent; font-weight: 700; font-size: 15px;
 cursor: pointer; transition: transform .18s ease, background .18s ease, box-shadow .18s ease, color .18s ease;
 text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(30,78,140,.18); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--primary); border-color: rgba(30,78,140,.35); }
.btn-ghost:hover { background: #F4F8FC; color: var(--primary-hover); }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head p, .lead { color: var(--muted); font-size: 16px; }
.card {
 background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
 box-shadow: var(--shadow); padding: 22px;
 transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card p { color: var(--muted); font-size: 15px; }
.badge {
 display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px;
 border-radius: 999px; background: var(--accent); color: #1C2430;
 font-size: 12px; font-weight: 600; letter-spacing: .02em;
}
.badge-abs { position: absolute; top: 22px; left: 22px; }
.faq details {
 background: #F7F9FC; border-bottom: 1px solid var(--line); padding: 0 16px;
}
.faq details[open] { background: #fff; border-left: 3px solid var(--primary); }
.faq summary { cursor: pointer; list-style: none; padding: 14px 0; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { color: var(--muted); padding-bottom: 12px; margin: 0; }
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr 1fr; gap: 28px; }
.footer-brand { font-weight: 700; font-size: 18px; margin: 0 0 8px; }
.site-footer p { color: var(--muted); font-size: 14px; }
.site-footer h3 { font-size: 16px; margin-bottom: 10px; }
.foot-links { display: grid; gap: 6px; }
.foot-links a { color: var(--ink); font-size: 14px; font-weight: 600; }
.foot-links a:hover { color: var(--primary); }
.search-form { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.search-form input {
 flex: 1 1 180px;
 min-height: 44px;
 border-radius: 12px;
 border: 1px solid var(--line);
 padding: 0 12px;
 background: #fff;
}
.search-form input:focus { border-color: var(--primary); }
.copy { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.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;
}
.band { padding: 56px 0; background: var(--bg); }
.band-alt { background: #fff; }
.band-soft { background: #E8EEF6; }
.band-head { padding: 36px 0 28px; }
.kicker {
 display: inline-flex;
 margin-bottom: 10px;
 color: var(--primary);
 font-size: 13px;
 font-weight: 700;
 letter-spacing: .04em;
}
.head-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; align-items: end; }
.summary-card { padding: 18px; }
.stat-list { list-style: none; padding: 0; margin: 0 0 8px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat-list li { background: #F4F8FC; border-radius: 12px; padding: 12px; }
.stat-list b { display: block; font-size: 28px; line-height: 1.1; color: var(--primary); }
.stat-list span { color: var(--muted); font-size: 13px; }
.day-block { display: grid; grid-template-columns: 132px 1fr; gap: 18px; margin-bottom: 26px; }
.day-label { margin: 0; font-size: 15px; color: var(--primary); padding-top: 8px; }
.day-label time { display: block; font-weight: 700; }
.cover-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.media-card { position: relative; padding: 12px; display: flex; flex-direction: column; }
.cover {
 width: 100%;
 aspect-ratio: 16 / 9;
 object-fit: cover;
 border-radius: 12px;
 background: #d5e1ef;
}
.media-card time { display: block; margin-top: 10px; color: var(--primary); font-size: 13px; font-weight: 700; }
.media-card h3 { font-size: 16px; min-height: 48px; }
.media-card p { margin: 0; }
.week-bars {
 list-style: none;
 margin: 0;
 padding: 8px 0 0;
 display: grid;
 grid-template-columns: repeat(7, minmax(0, 1fr));
 gap: 12px;
 align-items: end;
}
.week-bars li { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.bar {
 width: 100%;
 height: 140px;
 background: #E7EEF6;
 border-radius: 14px;
 display: flex;
 align-items: flex-end;
 overflow: hidden;
 border: 1px solid var(--line);
}
.bar i {
 display: block;
 width: 100%;
 height: var(--h);
 background: var(--primary);
 border-radius: 12px 12px 0 0;
}
.week-bars em { font-style: normal; color: var(--muted); font-size: 13px; }
.week-bars b { font-size: 14px; color: var(--ink); }
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.chip {
 display: inline-flex;
 align-items: center;
 min-height: 38px;
 padding: 0 14px;
 border-radius: 999px;
 border: 1px solid rgba(30,78,140,.18);
 background: #fff;
 color: var(--ink);
 font-weight: 700;
 font-size: 14px;
}
.chip.is-on { background: var(--primary); color: #fff; border-color: var(--primary); }
.serial-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 18px; align-items: start; }
.serial-list { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.serial-list li {
 display: flex;
 justify-content: space-between;
 gap: 12px;
 align-items: center;
 background: #fff;
 border: 1px solid var(--line);
 border-left: 3px solid var(--primary);
 border-radius: 12px;
 padding: 12px 14px;
 box-shadow: var(--shadow);
}
.serial-list a { font-weight: 700; }
.serial-list span { color: var(--muted); font-size: 14px; white-space: nowrap; }
.note-side { background: #F7FAFD; }
.device-stack { display: grid; gap: 12px; }
.device-line {
 display: grid;
 grid-template-columns: 88px 1fr;
 gap: 16px;
 align-items: center;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--radius);
 box-shadow: var(--shadow);
 padding: 16px 18px;
 color: var(--ink);
}
.device-line:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--ink); }
.device-line strong { color: var(--primary); }
.device-line span { color: var(--muted); }
.faq-tight { max-width: 820px; border-top: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.more-row {
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 16px;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--radius);
 box-shadow: var(--shadow);
 padding: 18px 20px;
}
.more-row p { margin: 0; color: var(--muted); }
@media (min-width: 1024px) {
 .nav-collapse:not([open]) > .nav-list { display: flex; }
}
@media (max-width: 1023px) {
 .nav-burger { display: inline-flex; }
 .nav-collapse { position: relative; }
 .nav-list {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: min(320px, 78vw);
  flex-direction: column;
  align-items: stretch;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 8px;
 }
 .nav-collapse[open] .nav-list { display: flex; }
 .nav-drop { flex-direction: column; align-items: stretch; }
 .drop-panel { position: static; min-width: 0; box-shadow: none; border: 0; padding: 0 0 6px 10px; }
 .nav-drop:hover .drop-panel { display: none; }
 .nav-drop details[open] .drop-panel,
 .nav-drop:focus-within .drop-panel { display: block; }
 .head-grid, .serial-grid, .footer-grid { grid-template-columns: 1fr; }
 .cover-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
 h1 { font-size: 34px; }
 h2 { font-size: 26px; }
 .day-block { grid-template-columns: 1fr; gap: 8px; }
 .week-bars { gap: 8px; }
 .bar { height: 110px; }
}
@media (max-width: 640px) {
 .container { width: min(var(--container), calc(100% - 28px)); }
 h1 { font-size: 30px; }
 .header-inner { min-height: 64px; gap: 8px; flex-wrap: wrap; padding: 8px 0; }
 .brand-name { font-size: 14px; max-width: 11em; line-height: 1.3; }
 .header-cta { min-height: 38px; padding: 0 10px; font-size: 13px; }
 .cover-row, .stat-list { grid-template-columns: 1fr; }
 .device-line, .more-row, .serial-list li { grid-template-columns: 1fr; display: grid; }
 .more-row { align-items: flex-start; }
 .week-bars { grid-template-columns: repeat(4, minmax(0, 1fr)); }
 .band { padding: 36px 0; }
}
@media (prefers-reduced-motion: reduce) {
 html { scroll-behavior: auto; }
 .card, .btn, .device-line { transition: none; }
}