/* roulang page: index */
:root {
  --bg: #F5F7FB;
  --card: #FFFFFF;
  --ink: #1C2836;
  --title: #16324F;
  --muted: #5C6B7C;
  --brand: #2C6BED;
  --brand-press: #1E4FB0;
  --brand-hover: #245dcc;
  --warm: #E08A3C;
  --warm-ink: #8A4E16;
  --line: #E4E9F1;
  --shadow: 0 10px 28px rgba(22,50,79,.08);
  --shadow-hover: 0 14px 32px rgba(22,50,79,.12);
  --r-card: 10px;
  --r-btn: 8px;
  --r-badge: 4px;
  --side: 216px;
  --top: 56px;
  --dock: 64px;
  --pad: 72px;
  --max: 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;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
button, input { font-family: inherit; }
h1, h2, h3, p, ul, ol, figure, blockquote { margin: 0; }
h1, h2, h3 { color: var(--title); line-height: 1.35; font-weight: 700; }
h1 { font-size: 40px; letter-spacing: -0.02em; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
a, a:link, a:visited { color: var(--ink); text-decoration: none; }
a:hover { color: var(--brand); text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 2px solid var(--warm);
  outline-offset: 2px;
}
::selection { background: rgba(44,107,237,.18); }
.wrap { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.workspace { margin-left: var(--side); min-height: 100vh; padding-bottom: calc(var(--dock) + 28px); }
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--side);
  background: var(--card);
  border-right: 1px solid var(--line);
  z-index: 50;
  display: flex;
  flex-direction: column;
  padding-bottom: 20px;
}
.logo {
  display: block;
  padding: 22px 16px 16px;
  color: var(--title);
  font-size: 18px;
  font-weight: 760;
  line-height: 1.35;
  text-decoration: none;
}
.logo:hover { color: var(--title); text-decoration: none; }
.logo small {
  display: block;
  margin-top: 4px;
  color: var(--warm-ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}
.side-nav nav { display: flex; flex-direction: column; gap: 4px; padding: 0 10px; }
.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 48px;
  padding: 10px 12px 10px 16px;
  border-radius: 8px;
  color: var(--title);
  text-decoration: none;
}
.nav-link strong { font-size: 15px; font-weight: 700; line-height: 1.4; }
.nav-link span { font-size: 12px; color: var(--muted); line-height: 1.4; }
.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 2px;
  background: transparent;
}
.nav-link:hover { background: var(--bg); text-decoration: none; color: var(--title); }
.nav-link.is-active { background: #fff; box-shadow: var(--shadow); }
.nav-link.is-active::before { background: var(--warm); }
.nav-link.is-active strong { color: var(--brand); }
.nav-close, .topbar { display: none; }
.mask { display: none; }
.band { padding: var(--pad) 0; }
.band:nth-child(odd) { background: var(--bg); }
.band:nth-child(even) { background: #fff; }
.idx {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--warm);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: .14em;
  margin-bottom: 8px;
}
.idx::after {
  content: "";
  width: 72px;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--warm) 0 1px, transparent 1px 8px);
  opacity: .7;
}
.desc { max-width: 46em; margin-top: 12px; color: var(--ink); font-size: 16px; }
.head { margin-bottom: 28px; }
.btn, a.btn, a.btn:link, a.btn:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--r-btn);
  border: 1px solid transparent;
  background: var(--brand);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s ease, transform .18s ease, box-shadow .18s ease;
}
a.btn:hover, button.btn:hover {
  background: var(--brand-hover);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
a.btn:active, button.btn:active { background: var(--brand-press); transform: translateY(1px); }
a.btn-ghost, a.btn-ghost:link, a.btn-ghost:visited {
  background: #fff;
  color: var(--title);
  border-color: var(--line);
}
a.btn-ghost:hover { background: #f8fafc; color: var(--brand); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.trust {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}
.sell { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 8px; }
.sell li {
  position: relative;
  padding-left: 16px;
  font-size: 16px;
}
.sell li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 7px;
  background: var(--warm);
  border-radius: 2px;
}
.frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-card);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #d5deea center / cover no-repeat;
  box-shadow: var(--shadow);
}
.frame svg { width: 100%; height: 100%; object-fit: cover; }
.chamfer { clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%); }
.frame-cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 8px;
  background: rgba(22,50,79,.88);
  color: #fff;
  font-size: 14px;
  border-radius: var(--r-badge);
}
.shot-a { background-image: linear-gradient(160deg, #f4e4d2 0%, #9eb4d4 42%, #16324f 100%); }
.shot-b { background-image: linear-gradient(200deg, #f7d7b0 0%, #2c6bed 48%, #16324f 100%); }
.shot-c { background-image: linear-gradient(180deg, #e7f0ea 0%, #8fa9c4 55%, #1c2836 100%); }
.shot-d { background-image: linear-gradient(135deg, #d9e4f2, #e08a3c 140%); }
.shot-e { background-image: linear-gradient(160deg, #f6efe4, #6d86a8 70%); }
.shot-f { background-image: linear-gradient(180deg, #c9d6ea, #16324f); }
.shot-g { background-image: linear-gradient(145deg, #f3e6cf, #5d7594); }
.shot-h { background-image: linear-gradient(180deg, #efe2d2, #2c6bed 120%); }
.frame::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 46%;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 16px;
  border-color: transparent transparent transparent #E08A3C;
  transform: translate(-50%, -50%);
}
.trio { display: grid; grid-template-columns: 1.35fr 1fr .86fr; gap: 16px; }
.tile {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 18px;
  transition: transform .18s ease, box-shadow .18s ease;
}
a.tile { display: block; color: inherit; text-decoration: none; }
a.tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); text-decoration: none; color: inherit; }
.tile p { margin-top: 8px; font-size: 16px; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--r-badge);
  background: rgba(224,138,60,.14);
  color: var(--warm-ink);
  font-size: 14px;
  font-weight: 700;
}
.tag-blue { background: rgba(44,107,237,.1); color: var(--brand); }
.scene { display: grid; grid-template-columns: 1.45fr .8fr; gap: 22px; align-items: stretch; }
.steps { display: grid; gap: 12px; }
.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 14px 14px 14px 16px;
  border-left: 3px solid var(--warm);
}
.step b { display: block; color: var(--warm); font-size: 13px; letter-spacing: .08em; }
.entry-grid { margin-top: 4px; }
.entry-kicker { color: var(--muted); font-size: 14px; margin-bottom: 6px; }
.billboard { display: grid; grid-template-columns: 1.45fr .82fr; gap: 16px; align-items: start; }
.feature-copy { padding: 16px 4px 0; }
.feature-copy h3 { font-size: 26px; }
.meta { margin-top: 8px; color: var(--muted); font-size: 14px; }
.stagger { display: grid; gap: 12px; }
.stagger .tile:nth-child(2) { margin-left: 28px; }
.stagger .tile:nth-child(3) { margin-left: 10px; }
.mini-title { font-size: 18px; }
.quote-bar {
  display: grid;
  grid-template-columns: 1.15fr .9fr .95fr;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.quote-bar blockquote { padding: 22px 20px; }
.quote-bar blockquote + blockquote { border-left: 1px solid var(--line); }
.quote-bar p { font-size: 16px; color: var(--title); }
.quote-bar cite { display: block; margin-top: 10px; font-style: normal; font-size: 14px; color: var(--warm-ink); }
.compare-mid {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 8px 0;
}
.vs {
  min-width: 64px;
  text-align: center;
  background: var(--title);
  color: #fff;
  border-radius: var(--r-badge);
  font-size: 14px;
  font-weight: 700;
  padding: 4px 8px;
}
.search-line { display: flex; gap: 10px; align-items: end; }
.field { flex: 1; }
.field span { display: block; margin-bottom: 6px; font-weight: 700; color: var(--title); font-size: 16px; }
input[type="search"] {
  width: 100%;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  background: #fff;
  color: var(--ink);
  padding: 0 14px;
  font-size: 16px;
  box-shadow: none;
  margin: 0;
}
input[type="search"]:focus { border-color: var(--brand); background: #fff; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 16px; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--title);
  border-radius: var(--r-badge);
  min-height: 36px;
  padding: 0 12px;
  cursor: pointer;
  font-weight: 700;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.is-on { background: var(--brand); border-color: var(--brand); color: #fff; }
.chip:active { transform: translateY(1px); }
.result {
  display: grid;
  grid-template-columns: 168px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.result h3 { font-size: 18px; }
.log { list-style: none; padding: 0; margin: 0; position: relative; }
.log::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}
.log li { position: relative; padding: 0 0 22px 28px; }
.log li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 9px;
  height: 9px;
  background: var(--warm);
  border-radius: 2px;
}
.log time { display: block; color: var(--warm-ink); font-size: 14px; font-weight: 700; }
.path { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.path li {
  list-style: none;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 16px;
  position: relative;
}
.path { padding: 0; margin: 0; }
.path b { color: var(--warm); letter-spacing: .08em; font-size: 13px; }
.acc { border-bottom: 1px solid var(--line); background: #fff; }
.acc summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 8px;
  font-weight: 700;
  color: var(--title);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 17px;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after { content: "＋"; color: var(--warm); font-weight: 700; }
.acc[open] summary::after { content: "－"; }
.acc[open] summary { color: var(--brand); }
.acc p { padding: 0 8px 16px; font-size: 16px; max-width: 48em; }
.acc-wrap { border-top: 1px solid var(--line); border-radius: var(--r-card); overflow: hidden; box-shadow: var(--shadow); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.metric strong { display: block; font-size: 22px; color: var(--title); margin: 8px 0; }
.assure {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.assure article { display: grid; grid-template-columns: 36px 1fr; gap: 10px; align-items: start; }
.ico {
  width: 36px;
  height: 36px;
  border-radius: var(--r-badge);
  background: rgba(44,107,237,.1);
  color: var(--brand);
  display: grid;
  place-items: center;
}
.slot + .slot { margin-top: 22px; }
.rail {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 6px;
}
.rail a {
  flex: 0 0 260px;
  scroll-snap-align: start;
  text-decoration: none;
  color: inherit;
}
.rail a:hover { text-decoration: none; color: inherit; }
.close-band {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 22px;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.site-foot { background: #fff; border-top: 1px solid var(--line); padding: 32px 0 24px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 20px; align-items: start; }
.foot-name { font-size: 20px; font-weight: 760; color: var(--title); }
.foot-nav { display: grid; gap: 8px; }
.fine { width: min(var(--max), calc(100% - 48px)); margin: 18px auto 0; color: var(--muted); font-size: 14px; }
.dock {
  position: fixed;
  left: var(--side);
  right: 0;
  bottom: 0;
  height: var(--dock);
  background: #fff;
  border-top: 1px solid var(--line);
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  box-shadow: 0 -8px 24px rgba(22,50,79,.05);
}
.dock p { font-size: 15px; color: var(--title); font-weight: 700; }
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--top);
  background: #fff;
  border-bottom: 1px solid var(--line);
  z-index: 60;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 0 14px;
}
.topbar .logo { padding: 0; font-size: 16px; }
.menu-btn, .nav-close {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--title);
  border-radius: var(--r-btn);
  min-height: 36px;
  padding: 0 12px;
  font-weight: 700;
  cursor: pointer;
}
.menu-btn:hover, .nav-close:hover { border-color: var(--brand); color: var(--brand); }
.menu-btn:active, .nav-close:active { transform: translateY(1px); }
@media (max-width: 1023px) {
  .workspace { margin-left: 0; padding-top: var(--top); }
  .topbar { display: flex; }
  .side-nav { transform: translateX(-105%); transition: transform .2s ease; }
  .side-nav.is-open { transform: none; }
  .nav-close { display: inline-flex; margin: 8px 10px 0; align-self: flex-start; }
  .mask.is-on { display: block; position: fixed; inset: 0; background: rgba(22,50,79,.38); z-index: 45; }
  .dock { left: 0; }
  .trio, .scene, .billboard, .quote-bar, .assure { grid-template-columns: 1fr; }
  .stagger .tile:nth-child(2), .stagger .tile:nth-child(3) { margin-left: 0; }
  .quote-bar blockquote + blockquote { border-left: 0; border-top: 1px solid var(--line); }
  .path, .metrics { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .close-band { clip-path: none; flex-direction: column; align-items: flex-start; }
  h1 { font-size: 30px; }
  h2 { font-size: 22px; }
}
@media (max-width: 768px) {
  :root { --pad: 40px; }
  .wrap { width: min(var(--max), calc(100% - 32px)); }
  .search-line, .result { grid-template-columns: 1fr; display: grid; }
  .search-line { align-items: stretch; }
  .result .tag { justify-self: start; }
}
@media (max-width: 520px) {
  .path, .metrics, .assure { grid-template-columns: 1fr; }
  .btn-row .btn { width: 100%; }
  .dock { height: 56px; padding: 0 12px; }
  .dock p { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .feature-copy h3 { font-size: 22px; }
  body { font-size: 16px; }
}

/* roulang page: category2 */
:root {
 --bg: #F5F7FB;
 --card: #FFFFFF;
 --ink: #1C2836;
 --title: #16324F;
 --muted: #5C6B7C;
 --brand: #2C6BED;
 --brand-press: #1E4FB0;
 --brand-hover: #245dcc;
 --warm: #E08A3C;
 --warm-ink: #8A4E16;
 --line: #E4E9F1;
 --shadow: 0 10px 28px rgba(22,50,79,.08);
 --shadow-hover: 0 14px 32px rgba(22,50,79,.12);
 --r-card: 10px;
 --r-btn: 8px;
 --r-badge: 4px;
 --side: 216px;
 --top: 56px;
 --dock: 64px;
 --pad: 72px;
 --max: 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;
 text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
button, input { font-family: inherit; }
a, a:link, a:visited { color: var(--ink); text-decoration: none; }
a:hover { color: var(--brand); text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible {
 outline: 2px solid var(--warm);
 outline-offset: 2px;
}
p { margin: 0 0 12px; }
h1, h2, h3, p:last-child { margin-bottom: 0; }
h1, h2, h3 { color: var(--title); font-weight: 760; line-height: 1.35; letter-spacing: 0; }
h1 { font-size: 40px; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
.side-nav {
 position: fixed;
 top: 0;
 left: 0;
 bottom: 0;
 width: var(--side);
 background: var(--card);
 border-right: 1px solid var(--line);
 z-index: 50;
 display: flex;
 flex-direction: column;
 padding-bottom: 20px;
}
.logo {
 display: block;
 padding: 22px 16px 16px;
 color: var(--title);
 font-size: 18px;
 font-weight: 760;
 line-height: 1.35;
 text-decoration: none;
}
.logo:hover { color: var(--title); text-decoration: none; }
.logo small {
 display: block;
 margin-top: 4px;
 color: var(--warm-ink);
 font-size: 12px;
 font-weight: 700;
 letter-spacing: .12em;
}
.side-nav nav { display: flex; flex-direction: column; gap: 4px; padding: 0 10px; }
.nav-link {
 position: relative;
 display: flex;
 flex-direction: column;
 gap: 2px;
 min-height: 48px;
 padding: 10px 12px 10px 16px;
 border-radius: 8px;
 color: var(--title);
 text-decoration: none;
}
.nav-link strong { font-size: 15px; font-weight: 700; line-height: 1.4; }
.nav-link span { font-size: 12px; color: var(--muted); line-height: 1.4; }
.nav-link::before {
 content: "";
 position: absolute;
 left: 0;
 top: 10px;
 bottom: 10px;
 width: 3px;
 border-radius: 2px;
 background: transparent;
}
.nav-link:hover { background: var(--bg); text-decoration: none; color: var(--title); }
.nav-link.is-active { background: #fff; box-shadow: var(--shadow); }
.nav-link.is-active::before { background: var(--warm); }
.nav-link.is-active strong { color: var(--brand); }
.nav-close, .topbar { display: none; }
.shell { margin-left: var(--side); padding-bottom: calc(var(--dock) + 8px); min-height: 100vh; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.band { padding: var(--pad) 0; position: relative; }
.band-white { background: #fff; }
.band-soft { background: var(--bg); }
.idx {
 display: inline-block;
 color: var(--warm);
 font-size: 13px;
 font-weight: 800;
 letter-spacing: .14em;
 line-height: 1;
}
.ruler {
 height: 8px;
 margin: 12px 0 22px;
 background-image: repeating-linear-gradient(90deg, #d5deea 0 10px, transparent 10px 18px);
 background-size: 100% 1px;
 background-repeat: repeat-x;
 background-position: left center;
}
.lead { margin-top: 12px; color: var(--ink); font-size: 17px; max-width: 680px; }
.muted { color: var(--muted); font-size: 15px; }
.tag {
 display: inline-block;
 padding: 2px 8px;
 border-radius: var(--r-badge);
 background: rgba(224,138,60,.14);
 color: var(--warm-ink);
 font-size: 13px;
 font-weight: 700;
 line-height: 1.6;
}
.tag-blue { background: rgba(44,107,237,.1); color: var(--brand); }
.btn, a.btn, a.btn:link, a.btn:visited {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 min-height: 44px;
 padding: 0 18px;
 border-radius: var(--r-btn);
 border: 1px solid transparent;
 background: var(--brand);
 color: #fff;
 font-size: 16px;
 font-weight: 700;
 line-height: 1;
 text-decoration: none;
 cursor: pointer;
 transition: background .18s ease, transform .18s ease, box-shadow .18s ease;
}
a.btn:hover, button.btn:hover {
 background: var(--brand-hover);
 color: #fff;
 text-decoration: none;
 transform: translateY(-1px);
}
a.btn:active, button.btn:active { background: var(--brand-press); transform: translateY(1px); }
a.btn-ghost, a.btn-ghost:link, a.btn-ghost:visited {
 background: #fff;
 color: var(--title);
 border-color: var(--line);
}
a.btn-ghost:hover { background: #f8fafc; color: var(--brand); }
.narrow-head .head-line {
 display: grid;
 grid-template-columns: 1.5fr .8fr;
 gap: 28px;
 align-items: end;
}
.head-note {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 16px 16px 14px 18px;
 position: relative;
}
.head-note::before {
 content: "";
 position: absolute;
 left: 0;
 top: 12px;
 bottom: 12px;
 width: 3px;
 background: var(--warm);
}
.head-note p { margin-top: 8px; color: var(--muted); font-size: 15px; }
.metric-row {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 14px;
}
.metric {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 18px 16px 16px;
 position: relative;
 overflow: hidden;
}
.metric::after {
 content: "";
 position: absolute;
 right: 0;
 top: 0;
 border-top: 14px solid rgba(224,138,60,.85);
 border-left: 14px solid transparent;
}
.metric b {
 display: block;
 color: var(--title);
 font-size: 32px;
 line-height: 1.1;
 font-weight: 760;
}
.metric span { display: block; margin-top: 6px; color: var(--muted); font-size: 14px; }
.mix {
 display: grid;
 grid-template-columns: 1.35fr .9fr;
 gap: 18px;
 align-items: start;
}
.feature {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 overflow: hidden;
 transition: transform .18s ease, box-shadow .18s ease;
}
.feature:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.frame {
 position: relative;
 aspect-ratio: 16 / 9;
 background: #16324F;
 overflow: hidden;
}
.frame img { width: 100%; height: 100%; object-fit: cover; }
.feature-copy { padding: 16px 18px 18px; }
.feature-copy h3 { font-size: 24px; margin: 8px 0; }
.meta { margin-top: 8px; color: var(--muted); font-size: 14px; }
.list-side { display: flex; flex-direction: column; gap: 10px; }
.compact {
 display: grid;
 grid-template-columns: 128px 1fr;
 gap: 0;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 overflow: hidden;
 color: inherit;
 text-decoration: none;
 transition: transform .18s ease, box-shadow .18s ease;
}
.compact:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); text-decoration: none; color: inherit; }
.compact .frame { border-radius: 0; height: 100%; aspect-ratio: 16 / 9; }
.compact div { padding: 10px 12px; }
.compact strong { display: block; color: var(--title); font-size: 15px; line-height: 1.45; }
.compact em { display: block; margin-top: 4px; color: var(--muted); font-style: normal; font-size: 13px; }
.more-link {
 align-self: flex-start;
 margin-top: 4px;
 font-weight: 700;
 color: var(--title);
 border-bottom: 1px solid var(--line);
 padding-bottom: 2px;
}
.more-link:hover { color: var(--brand); }
.duo {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 16px;
}
.panel {
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 22px 22px 20px;
 position: relative;
}
.panel-warm { background: #fffaf5; }
.panel h3 { margin: 8px 0 10px; font-size: 22px; }
.tick {
 display: flex;
 gap: 10px;
 align-items: flex-start;
 padding: 8px 0;
 border-top: 1px solid var(--line);
 color: var(--ink);
 font-size: 15px;
}
.tick i {
 flex: 0 0 18px;
 height: 8px;
 margin-top: 10px;
 background: repeating-linear-gradient(90deg, var(--warm) 0 4px, transparent 4px 7px);
}
.devices { display: grid; grid-template-columns: 1.15fr .9fr .9fr; gap: 14px; }
.device {
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 18px 16px 16px;
 min-height: 180px;
}
.device:nth-child(1) { background: #16324F; color: #fff; }
.device:nth-child(1) h3, .device:nth-child(1) .idx { color: #fff; }
.device:nth-child(1) p { color: rgba(255,255,255,.86); }
.device h3 { margin: 10px 0; }
.news { display: flex; flex-direction: column; gap: 0; }
.news a {
 display: grid;
 grid-template-columns: 120px 1fr auto;
 gap: 16px;
 align-items: center;
 padding: 16px 4px;
 border-bottom: 1px solid var(--line);
 color: inherit;
 text-decoration: none;
}
.news a:hover { text-decoration: none; color: inherit; background: rgba(255,255,255,.65); }
.news a:hover strong { color: var(--brand); text-decoration: underline; }
.news time { color: var(--warm-ink); font-weight: 700; font-size: 14px; }
.news strong { color: var(--title); font-size: 18px; }
.news span { color: var(--muted); font-size: 14px; }
.micro {
 display: flex;
 align-items: center;
 gap: 18px;
 background: #fff;
 border: 1px solid var(--line);
 border-left: 3px solid var(--brand);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 16px 18px;
}
.micro b { color: var(--title); font-size: 16px; white-space: nowrap; }
.close-band {
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 18px;
 background: #fff;
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 22px;
}
.close-band h2 { font-size: 26px; }
.dock {
 position: fixed;
 left: var(--side);
 right: 0;
 bottom: 0;
 min-height: var(--dock);
 background: #fff;
 border-top: 1px solid var(--line);
 z-index: 40;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 padding: 10px 22px;
 box-shadow: 0 -8px 24px rgba(22,50,79,.06);
}
.dock p { margin: 0; color: var(--title); font-weight: 700; }
.site-foot { background: #fff; border-top: 1px solid var(--line); padding: 36px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 20px; align-items: start; }
.foot-name { color: var(--title); font-size: 18px; font-weight: 760; margin-bottom: 8px; }
.foot-nav { display: grid; gap: 8px; }
.fine { width: min(var(--max), calc(100% - 40px)); margin: 18px auto 0; color: var(--muted); font-size: 13px; }
.topbar {
 position: fixed;
 top: 0;
 left: 0;
 right: 0;
 height: var(--top);
 background: #fff;
 border-bottom: 1px solid var(--line);
 z-index: 60;
 align-items: center;
 justify-content: space-between;
 padding: 0 12px 0 14px;
}
.topbar .logo { padding: 0; font-size: 16px; }
.menu-btn, .nav-close {
 border: 1px solid var(--line);
 background: #fff;
 color: var(--title);
 border-radius: var(--r-btn);
 min-height: 36px;
 padding: 0 12px;
 font-weight: 700;
 cursor: pointer;
}
.menu-btn:hover, .nav-close:hover { border-color: var(--brand); color: var(--brand); }
.menu-btn:active, .nav-close:active { transform: translateY(1px); }
.backdrop { display: none; }
@media (max-width: 1024px) {
 :root { --pad: 40px; }
 .topbar { display: flex; }
 .side-nav { transform: translateX(-105%); transition: transform .2s ease; }
 .side-nav.is-open { transform: none; box-shadow: var(--shadow-hover); }
 .nav-close { display: inline-flex; margin: 8px 10px 0; align-self: flex-start; }
 .shell { margin-left: 0; padding-top: var(--top); }
 .dock { left: 0; }
 .backdrop.is-on { display: block; position: fixed; inset: 0; background: rgba(22,50,79,.28); z-index: 45; }
 .metric-row, .devices { grid-template-columns: 1fr 1fr; }
 .devices .device:last-child { grid-column: 1 / -1; }
 .mix, .narrow-head .head-line, .duo, .foot-grid { grid-template-columns: 1fr; }
 h1 { font-size: 32px; }
 h2 { font-size: 24px; }
}
@media (max-width: 768px) {
 .wrap { width: min(var(--max), calc(100% - 28px)); }
 .news a { grid-template-columns: 1fr; gap: 4px; }
 .close-band { flex-direction: column; align-items: flex-start; }
 .micro { flex-direction: column; align-items: flex-start; gap: 6px; }
 .compact { grid-template-columns: 108px 1fr; }
}
@media (max-width: 520px) {
 h1 { font-size: 30px; }
 h2 { font-size: 22px; }
 .metric-row, .devices { grid-template-columns: 1fr; }
 .devices .device:last-child { grid-column: auto; }
 .dock { padding: 8px 12px; }
 .dock p { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 58vw; }
 .compact { grid-template-columns: 96px 1fr; }
 .feature-copy h3 { font-size: 20px; }
}

/* roulang page: category1 */
:root {
 --bg: #F5F7FB;
 --card: #FFFFFF;
 --ink: #1C2836;
 --title: #16324F;
 --muted: #5C6B7C;
 --brand: #2C6BED;
 --brand-press: #1E4FB0;
 --brand-hover: #245dcc;
 --warm: #E08A3C;
 --warm-ink: #8A4E16;
 --line: #E4E9F1;
 --shadow: 0 10px 28px rgba(22,50,79,.08);
 --shadow-hover: 0 14px 32px rgba(22,50,79,.12);
 --r-card: 10px;
 --r-btn: 8px;
 --r-badge: 4px;
 --side: 216px;
 --top: 56px;
 --dock: 64px;
 --pad: 72px;
 --max: 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;
 text-rendering: optimizeLegibility;
 overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
button, input { font-family: inherit; }
p { margin: 0 0 12px; }
h1, h2, h3 { margin: 0 0 10px; color: var(--title); font-weight: 760; line-height: 1.35; }
h1 { font-size: 40px; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
a, a:link, a:visited { color: var(--ink); text-decoration: none; }
a:hover { color: var(--brand); text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
 outline: 2px solid var(--warm);
 outline-offset: 2px;
}
.side-nav {
 position: fixed;
 top: 0;
 left: 0;
 bottom: 0;
 width: var(--side);
 background: var(--card);
 border-right: 1px solid var(--line);
 z-index: 50;
 display: flex;
 flex-direction: column;
 padding-bottom: 20px;
}
.logo {
 display: block;
 padding: 22px 16px 16px;
 color: var(--title);
 font-size: 18px;
 font-weight: 760;
 line-height: 1.35;
 text-decoration: none;
}
.logo:hover { color: var(--title); text-decoration: none; }
.logo small {
 display: block;
 margin-top: 4px;
 color: var(--warm-ink);
 font-size: 12px;
 font-weight: 700;
 letter-spacing: .12em;
}
.side-nav nav { display: flex; flex-direction: column; gap: 4px; padding: 0 10px; }
.nav-link {
 position: relative;
 display: flex;
 flex-direction: column;
 gap: 2px;
 min-height: 48px;
 padding: 10px 12px 10px 16px;
 border-radius: 8px;
 color: var(--title);
 text-decoration: none;
}
.nav-link strong { font-size: 15px; font-weight: 700; line-height: 1.4; }
.nav-link span { font-size: 12px; color: var(--muted); line-height: 1.4; }
.nav-link::before {
 content: "";
 position: absolute;
 left: 0;
 top: 10px;
 bottom: 10px;
 width: 3px;
 border-radius: 2px;
 background: transparent;
}
.nav-link:hover { background: var(--bg); text-decoration: none; color: var(--title); }
.nav-link.is-active { background: #fff; box-shadow: var(--shadow); }
.nav-link.is-active::before { background: var(--warm); }
.nav-link.is-active strong { color: var(--brand); }
.nav-close, .topbar { display: none; }
.scrim { display: none; }
.main-col { margin-left: var(--side); min-height: 100vh; padding-bottom: calc(var(--dock) + 12px); }
.section { padding: var(--pad) 0; }
.section-white { background: var(--card); }
.section-soft { background: var(--bg); }
.page-head { padding: 36px 0 28px; border-bottom: 1px solid var(--line); }
.idx {
 margin: 0 0 8px;
 color: var(--warm);
 font-size: 12px;
 font-weight: 700;
 letter-spacing: .16em;
}
.idx::before {
 content: "";
 display: inline-block;
 width: 18px;
 height: 1px;
 margin-right: 8px;
 background: var(--warm);
 vertical-align: middle;
}
.lead { margin: 0; color: var(--muted); font-size: 16px; max-width: 640px; }
.h-line {
 height: 1px;
 margin: 8px 0 20px;
 border: 0;
 background: linear-gradient(90deg, var(--warm), var(--line) 140px, transparent);
}
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat {
 background: var(--bg);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 padding: 12px 12px 10px;
 clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}
.stat b { display: block; color: var(--title); font-size: 28px; line-height: 1.15; }
.stat span { color: var(--muted); font-size: 13px; }
.btn, a.btn, a.btn:link, a.btn:visited {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 min-height: 44px;
 padding: 0 18px;
 border-radius: var(--r-btn);
 border: 1px solid transparent;
 background: var(--brand);
 color: #fff;
 font-size: 16px;
 font-weight: 700;
 line-height: 1;
 text-decoration: none;
 cursor: pointer;
 transition: background .18s ease, transform .18s ease, box-shadow .18s ease;
}
a.btn:hover, button.btn:hover {
 background: var(--brand-hover);
 color: #fff;
 text-decoration: none;
 transform: translateY(-1px);
}
a.btn:active, button.btn:active { background: var(--brand-press); transform: translateY(1px); }
a.btn-ghost, a.btn-ghost:link, a.btn-ghost:visited {
 background: #fff;
 color: var(--title);
 border-color: var(--line);
}
a.btn-ghost:hover { background: #f8fafc; color: var(--brand); }
.list-foot { display: flex; justify-content: flex-end; margin-top: 16px; }
.tag {
 display: inline-block;
 padding: 2px 8px;
 border-radius: var(--r-badge);
 background: rgba(224,138,60,.14);
 color: var(--warm-ink);
 font-size: 13px;
 font-weight: 700;
}
.tag-blue { background: rgba(44,107,237,.1); color: var(--brand); }
.meta { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.media {
 position: relative;
 aspect-ratio: 16 / 9;
 overflow: hidden;
 border-radius: 8px;
 background: #d5dfec;
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.wide {
 display: grid;
 grid-template-columns: 1.35fr .9fr;
 gap: 18px;
 align-items: center;
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 12px;
 margin-bottom: 14px;
 clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}
.wide h3 { font-size: 26px; }
.dense { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dense-card {
 display: grid;
 grid-template-columns: 168px 1fr;
 gap: 12px;
 align-items: center;
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 10px;
 transition: transform .18s ease, box-shadow .18s ease;
}
.dense-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.chip {
 border: 1px solid var(--line);
 background: #fff;
 color: var(--title);
 border-radius: var(--r-badge);
 min-height: 36px;
 padding: 0 12px;
 cursor: pointer;
 font-weight: 700;
}
.chip:hover { border-color: var(--brand); color: var(--brand); }
.chip.is-on { background: var(--brand); border-color: var(--brand); color: #fff; }
.chip:active { transform: translateY(1px); }
.rhythm {
 display: grid;
 grid-template-columns: repeat(7, 1fr);
 gap: 10px;
 align-items: end;
}
.bar {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 12px 10px 10px;
 min-height: 148px;
 display: flex;
 flex-direction: column;
 justify-content: flex-end;
}
.bar b { color: var(--title); font-size: 20px; line-height: 1.2; }
.bar span { color: var(--muted); font-size: 13px; }
.bar i {
 display: block;
 margin-top: 10px;
 height: var(--h);
 background: var(--brand);
 border-radius: 4px 4px 0 0;
}
.bar.is-peak i { background: var(--warm); }
.note-panel {
 background: var(--card);
 border: 1px solid var(--line);
 border-left: 3px solid var(--warm);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 18px 18px 8px;
}
.note-panel p:last-child { margin-bottom: 10px; }
.preview { display: grid; gap: 8px; margin-top: 8px; }
.preview li {
 display: flex;
 justify-content: space-between;
 gap: 12px;
 list-style: none;
 padding: 10px 0;
 border-top: 1px solid var(--line);
 color: var(--title);
 font-weight: 700;
}
.preview { margin: 0; padding: 0; }
.preview small { color: var(--muted); font-weight: 500; }
.check-row { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 12px; }
.check {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 18px 16px 14px;
}
.check strong { display: block; color: var(--warm); font-size: 12px; letter-spacing: .14em; margin-bottom: 6px; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.quote {
 margin: 0;
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 18px 16px 14px;
}
.quote p { color: var(--title); font-size: 16px; }
.quote footer { color: var(--muted); font-size: 13px; }
.faq { display: grid; gap: 10px; }
.faq details {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 0 16px;
}
.faq summary {
 cursor: pointer;
 min-height: 58px;
 display: flex;
 align-items: center;
 color: var(--title);
 font-weight: 760;
 list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; margin-left: auto; color: var(--warm); font-weight: 700; }
.faq details[open] summary::after { content: "－"; }
.faq summary:hover { color: var(--brand); }
.faq details p { color: var(--muted); padding-bottom: 8px; }
.close-band {
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 18px;
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--r-card);
 box-shadow: var(--shadow);
 padding: 22px 20px;
 clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}
.close-band p { margin: 0; color: var(--muted); }
.dock {
 position: fixed;
 left: var(--side);
 right: 0;
 bottom: 0;
 height: var(--dock);
 background: #fff;
 border-top: 1px solid var(--line);
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 padding: 0 20px;
 z-index: 40;
}
.dock p { margin: 0; color: var(--title); font-weight: 760; }
.site-foot { background: #16324F; color: #d5deea; padding: 36px 0 28px; }
.site-foot a, .site-foot a:link, .site-foot a:visited { color: #fff; }
.site-foot a:hover { color: #f3d2b0; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 20px; align-items: start; }
.foot-name { margin: 0 0 8px; color: #fff; font-size: 20px; font-weight: 760; }
.foot-nav { display: grid; gap: 8px; }
.fine { margin: 18px 0 0; color: #b7c3d4; font-size: 13px; }
.topbar {
 position: fixed;
 top: 0;
 left: 0;
 right: 0;
 height: var(--top);
 background: #fff;
 border-bottom: 1px solid var(--line);
 z-index: 60;
 align-items: center;
 justify-content: space-between;
 padding: 0 12px 0 14px;
}
.topbar .logo { padding: 0; font-size: 16px; }
.topbar .logo small { display: none; }
.menu-btn, .nav-close {
 border: 1px solid var(--line);
 background: #fff;
 color: var(--title);
 border-radius: var(--r-btn);
 min-height: 36px;
 padding: 0 12px;
 font-weight: 700;
 cursor: pointer;
}
.menu-btn:hover, .nav-close:hover { border-color: var(--brand); color: var(--brand); }
.menu-btn:active, .nav-close:active { transform: translateY(1px); }
@media (max-width: 1024px) {
 :root { --pad: 40px; }
 .topbar { display: flex; }
 .main-col { margin-left: 0; padding-top: var(--top); }
 .side-nav { transform: translateX(-105%); transition: transform .2s ease; }
 .side-nav.is-open { transform: none; box-shadow: var(--shadow-hover); }
 .nav-close { display: inline-flex; margin: 8px 10px 0; align-self: flex-start; }
 .scrim.is-on { display: block; position: fixed; inset: 0; background: rgba(22,50,79,.38); z-index: 45; }
 .dock { left: 0; height: 56px; }
 h1 { font-size: 30px; }
 h2 { font-size: 22px; }
 .wide, .check-row, .quotes, .foot-grid, .close-band { grid-template-columns: 1fr; display: grid; }
 .close-band { display: grid; }
 .stat b { font-size: 22px; }
}
@media (max-width: 768px) {
 .dense { grid-template-columns: 1fr; }
 .stat-row { grid-template-columns: 1fr; }
 .rhythm { grid-template-columns: repeat(4, 1fr); }
 .wide h3 { font-size: 22px; }
}
@media (max-width: 520px) {
 .dense-card { grid-template-columns: 1fr; }
 .rhythm { grid-template-columns: repeat(2, 1fr); }
 .dock p { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
 .section { padding: 40px 0; }
}