/* roulang page: index */
:root {
  --ink: #1C1714;
  --paper: #F4EFE6;
  --film: #D9783C;
  --night: #2A211C;
  --mark: #B8456A;
  --pin: #3F6A55;
  --line: rgba(28,23,20,.16);
  --fog: rgba(244,239,230,.72);
  --sand: #EFE6D8;
  --card: #FFFDF8;
  --muted: rgba(28,23,20,.72);
  --shadow: 0 10px 28px rgba(28,23,20,.08);
  --shadow-hover: 0 16px 36px rgba(28,23,20,.14);
  --radius-card: 14px;
  --radius-img: 12px;
  --radius-input: 10px;
  --header-h: 72px;
  --max: 1120px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16.5px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}
body.has-dock { padding-bottom: 92px; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; color: inherit; }
p { margin: 0 0 .85em; }
h1, h2, h3, h4 { font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-weight: 600; line-height: 1.35; color: inherit; }
h1 { font-size: 46px; letter-spacing: .01em; margin: 0 0 .4em; }
h2 { font-size: 28px; margin: 0 0 .5em; }
h3 { font-size: 19px; margin: 0 0 .4em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--film); outline-offset: 2px; }
::selection { background: rgba(217,120,60,.28); color: var(--ink); }
.container { max-width: var(--max); }
.shot {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-img);
  background: #E4DDD3;
}
.shot.ratio-32 { aspect-ratio: 3/2; }
.meta { font-size: 13.5px; line-height: 1.7; color: var(--muted); letter-spacing: .02em; }
.coord { color: var(--pin); font-size: 12.5px; letter-spacing: .14em; }
.sec { position: relative; padding: 72px 0; }
.sec + .sec { border-top: 1px solid var(--line); }
.sec-paper { background: var(--paper); }
.sec-sand {
  background-color: var(--sand);
  background-image: repeating-linear-gradient(180deg, transparent, transparent 26px, rgba(28,23,20,.035) 27px);
}
.sec-night { background: var(--night); color: var(--paper); border-top-color: rgba(244,239,230,.12); }
.sec-night .sec-lead, .sec-night .meta { color: var(--fog); }
.sec-head { max-width: 740px; margin-bottom: 28px; }
.sec-lead { font-size: 16.5px; color: var(--muted); margin-bottom: 0; }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .18em;
  margin-bottom: 14px;
}
.kicker i, .pin-dot, .status-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--mark); display: inline-block; flex: none;
}
.site-header {
  position: sticky; top: 0; z-index: 50;
  min-height: var(--header-h);
  background: rgba(244,239,230,.55);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-stuck {
  background: rgba(244,239,230,.94);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 20px rgba(28,23,20,.04);
}
.nav-shell { min-height: var(--header-h); display: flex; align-items: center; }
.brand { display: flex; flex-direction: column; line-height: 1.25; padding: 8px 0; }
.brand-name { font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-size: 16px; font-weight: 600; }
.brand-sub { font-size: 12px; letter-spacing: .22em; color: var(--pin); margin-top: 2px; }
.navbar { padding: 0; width: 100%; }
.navbar-nav { align-items: center; gap: 0; }
.navbar-nav .nav-link {
  font-size: 15px;
  color: var(--ink);
  padding: 8px 16px;
  background: transparent;
  border-radius: 0;
  position: relative;
}
.navbar-nav .nav-item + .nav-item .nav-link { box-shadow: inset 1px 0 0 var(--line); }
.navbar-nav .nav-link:hover { color: var(--film); }
.navbar-nav .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film), inset 1px 0 0 var(--line); }
.navbar-nav .nav-item:first-child .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film); }
.navbar-toggler {
  width: 46px; height: 46px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent;
  padding: 0; display: inline-flex; align-items: center; justify-content: center;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler-icon {
  width: 18px; height: 12px; background-size: 18px 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 12'%3E%3Cpath d='M0 1h18M0 6h18M0 11h18' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
}
.btn {
  border-radius: 999px;
  padding: 12px 26px;
  font-size: 15px;
  line-height: 1.2;
  border: 1px solid transparent;
  box-shadow: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:focus { box-shadow: none; }
.btn-film { background: var(--film); color: var(--ink); border-color: var(--film); }
.btn-film:hover, .btn-film:active, .btn-film:focus-visible {
  background: var(--ink); color: var(--paper); border-color: var(--ink); transform: translateY(1px);
}
.btn-line {
  background: transparent; color: var(--paper); border-color: rgba(244,239,230,.45);
}
.btn-line:hover, .btn-line:active { background: var(--paper); color: var(--ink); transform: translateY(1px); }
.link-quiet {
  display: inline-flex; align-items: center; min-height: 44px;
  text-decoration: underline; text-underline-offset: 5px; text-decoration-thickness: 1px;
  text-decoration-color: var(--film); font-size: 15px;
}
.link-quiet:hover { color: var(--film); }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 999px; padding: .28em .72em;
  font-weight: 500; font-size: 12px; letter-spacing: .14em;
  background: transparent; border: 1px solid rgba(63,106,85,.38); color: var(--pin);
  vertical-align: middle;
}
.badge::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.badge.is-mark { color: var(--mark); border-color: rgba(184,69,106,.42); }
.badge.is-ink { color: var(--ink); border-color: var(--line); }
.badge.is-fog { color: var(--paper); border-color: rgba(244,239,230,.35); }
.hero { padding: 54px 0 72px; overflow: hidden; }
.hero h1 { max-width: 640px; }
.hero-sub { font-size: 18px; margin-bottom: .7em; color: var(--fog); }
.hero .sec-lead { color: var(--fog); max-width: 620px; }
.hero-actions { display: flex; align-items: center; gap: 22px; margin: 22px 0 26px; flex-wrap: wrap; }
.node-strip { display: flex; flex-wrap: wrap; gap: 10px 18px; }
.node-strip li {
  display: flex; align-items: center; gap: 8px;
  font-size: 13.5px; color: var(--fog); letter-spacing: .04em;
}
.node-strip b { color: var(--paper); font-weight: 600; }
.pin-stack { position: relative; min-height: 470px; }
.pin-card {
  position: absolute; width: 78%;
  background: var(--card); color: var(--ink);
  border-radius: var(--radius-card); border: 1px solid var(--line);
  box-shadow: var(--shadow); padding: 12px 12px 14px;
}
.pin-card:nth-child(1) { top: 0; right: 0; }
.pin-card:nth-child(2) { top: 148px; left: 0; width: 74%; }
.pin-card:nth-child(3) { top: 292px; right: 16px; width: 70%; }
.pin-card header { display: flex; justify-content: space-between; align-items: center; margin: 10px 2px 0; }
.pin-card h3 { font-size: 18px; margin: 0; }
.pin-card p { font-size: 13.5px; line-height: 1.7; margin: 6px 2px 0; color: var(--muted); }
.node-row { display: grid; grid-template-columns: 1.35fr .78fr 1.35fr; gap: 18px; align-items: stretch; }
.node {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 26px 24px 22px; min-height: 100%;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.node:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.node-narrow {
  background: var(--night); color: var(--paper);
  display: flex; flex-direction: column; justify-content: space-between;
  padding-top: 32px;
}
.node-narrow .meta, .node-narrow p { color: var(--fog); }
.node h3 { font-size: 22px; }
.route { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; position: relative; }
.route::before {
  content: ""; position: absolute; left: 6%; right: 6%; top: 22px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(28,23,20,.28), transparent);
}
.stop { position: relative; padding-top: 8px; }
.stop-index {
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--paper);
  display: grid; place-items: center; font-size: 12px; letter-spacing: .08em;
  margin-bottom: 14px; position: relative; z-index: 1;
}
.stop-index i { width: 7px; height: 7px; border-radius: 50%; background: var(--mark); }
.stop .cardish {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 12px; transition: box-shadow .2s ease, border-color .2s ease;
}
.stop .cardish:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.quote-wall { display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 16px; }
.quote {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 22px 20px 18px;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.quote:first-child { grid-row: span 1; }
.quote:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.quote q { display: block; font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-size: 18px; line-height: 1.7; quotes: none; margin-bottom: 16px; }
.who { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.avatar {
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--night); color: var(--paper); font-size: 14px; flex: none;
}
.who small { display: block; color: var(--muted); font-size: 12.5px; }
.fav { color: var(--pin); font-size: 13px; letter-spacing: .08em; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.compare article {
  border-radius: var(--radius-card); border: 1px solid var(--line); padding: 26px 24px;
  background: var(--card); box-shadow: var(--shadow);
}
.compare .is-dim { background: transparent; }
.tick-list li { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-top: 1px solid var(--line); font-size: 15.5px; }
.mark-no, .mark-yes {
  width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center;
  font-size: 12px; flex: none; margin-top: 3px;
}
.mark-no { color: var(--mark); border: 1px solid rgba(184,69,106,.45); }
.mark-yes { color: var(--pin); border: 1px solid rgba(63,106,85,.45); }
.timeline { position: relative; margin-left: 8px; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 4px; top: 6px; bottom: 6px; width: 1px; background: var(--line); }
.timeline li { position: relative; padding: 0 0 26px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -28px; top: 8px; width: 9px; height: 9px; border-radius: 50%;
  background: var(--mark); box-shadow: 0 0 0 4px var(--paper);
}
.sec-sand .timeline li::before { box-shadow: 0 0 0 4px var(--sand); }
.timeline h3 { font-size: 18px; margin-bottom: 4px; }
.qa .accordion-item { background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.qa .accordion-item:has(.show) { box-shadow: inset 2px 0 0 var(--film); }
.qa .accordion-button {
  background: transparent; color: var(--ink); box-shadow: none;
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  font-size: 18px; padding: 20px 8px 20px 14px; gap: 12px;
}
.qa .accordion-button:not(.collapsed) { background: transparent; color: var(--ink); box-shadow: none; }
.qa .accordion-button:focus { box-shadow: none; border-color: transparent; }
.qa .accordion-button::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 6l5 5 5-5' fill='none' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
  background-size: 14px; width: 14px; height: 14px;
}
.qa .accordion-body { padding: 0 18px 18px 16px; color: var(--muted); font-size: 15.5px; }
.assure {
  display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: center;
}
.assure-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.assure-item {
  display: flex; gap: 12px; align-items: flex-start;
  border-top: 1px solid rgba(244,239,230,.18); padding-top: 12px;
}
.assure-item svg { flex: none; margin-top: 4px; }
.assure-item strong { display: block; font-size: 16px; font-weight: 600; }
.assure-item span { display: block; color: var(--fog); font-size: 13.5px; line-height: 1.7; }
.split-7 { display: grid; grid-template-columns: 1.4fr .9fr; gap: 20px; align-items: start; }
.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 16px; transition: box-shadow .2s ease, border-color .2s ease;
}
.panel:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.side-note + .side-note { margin-top: 14px; }
.side-note { padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-card); background: rgba(255,253,248,.66); }
.side-note a { text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--film); }
.offset-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 22px; align-items: start; }
.offset-grid .shift { margin-top: 52px; }
.tier + .tier { margin-top: 18px; }
.tier-top { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; margin-bottom: 8px; }
.tier-top strong { font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-size: 18px; }
.track { height: 8px; border-radius: 999px; background: rgba(28,23,20,.08); overflow: hidden; }
.track span { display: block; height: 100%; background: var(--film); border-radius: inherit; }
.track .lv2 { width: 74%; background: #C56A38; }
.track .lv3 { width: 56%; background: var(--pin); }
.track .lv1 { width: 92%; }
.wall { columns: 3; column-gap: 18px; }
.wall article {
  break-inside: avoid; margin: 0 0 18px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 12px; display: inline-block; width: 100%;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.wall article:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.wall h3 { font-size: 18px; margin: 10px 2px 4px; }
.wall h3 a { text-decoration: underline; text-underline-offset: 4px; text-decoration-color: transparent; }
.wall h3 a:hover { text-decoration-color: var(--film); }
.wall p { margin: 0 2px 8px; font-size: 14.5px; color: var(--muted); }
.time-list li {
  display: grid; grid-template-columns: 140px 1fr auto; gap: 18px; align-items: center;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.time-list h3 { margin: 0; font-size: 20px; }
.time-list p { margin: 0; color: var(--muted); }
.chip-board {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  box-shadow: var(--shadow); padding: 22px;
}
.chip-line { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.chip-line + .chip-line { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.chip-label { width: 52px; font-size: 13px; letter-spacing: .12em; color: var(--muted); }
.chip {
  border: 1px solid var(--line); background: transparent; border-radius: 999px;
  padding: 8px 16px; font-size: 14px; line-height: 1.2; cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.chip:hover { border-color: var(--film); }
.chip.is-on { background: var(--film); border-color: var(--film); color: var(--ink); }
.gate-row { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.gate {
  display: block; min-height: 220px; padding: 28px 26px;
  border-radius: var(--radius-card); border: 1px solid var(--line); background: var(--card);
  box-shadow: var(--shadow); transition: box-shadow .2s ease, border-color .2s ease;
}
.gate:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.3); }
.gate h3 { font-size: 26px; margin: 14px 0 8px; }
.gate p { color: var(--muted); margin: 0; max-width: 460px; }
.closer { display: flex; justify-content: space-between; gap: 24px; align-items: flex-end; }
.closer-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.site-footer { background: var(--night); color: var(--paper); border-top: 1px solid rgba(244,239,230,.14); padding: 42px 0 28px; }
.foot-grid { display: flex; justify-content: space-between; gap: 28px; align-items: flex-start; padding-bottom: 22px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 8px 0; }
.foot-nav a { padding: 6px 14px; font-size: 14.5px; color: var(--fog); }
.foot-nav a + a { box-shadow: inset 1px 0 0 rgba(244,239,230,.2); }
.foot-nav a:hover { color: var(--paper); }
.copyright { border-top: 1px solid rgba(244,239,230,.14); padding-top: 16px; color: var(--fog); font-size: 13px; }
.dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: var(--night); color: var(--paper);
  border-top: 1px solid rgba(244,239,230,.16);
  box-shadow: 0 -8px 24px rgba(28,23,20,.16);
}
.dock[hidden] { display: none !important; }
.dock-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.dock p { margin: 0; font-size: 15px; }
.dock-actions { display: flex; align-items: center; gap: 10px; }
.dock-close {
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(244,239,230,.28);
  background: transparent; color: var(--paper); font-size: 20px; line-height: 1;
}
.dock-close:hover { background: rgba(244,239,230,.08); }
@media (max-width: 991.98px) {
  h1 { font-size: 34px; }
  h2 { font-size: 26px; }
  .sec { padding: 48px 0; }
  .hero { padding: 36px 0 48px; }
  .pin-stack { min-height: 0; display: grid; gap: 14px; }
  .pin-card, .pin-card:nth-child(1), .pin-card:nth-child(2), .pin-card:nth-child(3) {
    position: relative; width: 100%; top: auto; left: auto; right: auto;
  }
  .node-row, .route, .compare, .split-7, .offset-grid, .quote-wall, .gate-row, .assure, .assure-row {
    grid-template-columns: 1fr;
  }
  .route::before { display: none; }
  .offset-grid .shift { margin-top: 0; }
  .wall { columns: 2; }
  .navbar-collapse { background: var(--paper); border-top: 1px solid var(--line); margin: 0 -12px; padding: 4px 12px 12px; }
  .navbar-nav { align-items: stretch; }
  .navbar-nav .nav-link { font-size: 22px; padding: 14px 2px; border-bottom: 1px solid var(--line); box-shadow: none !important; }
  .navbar-nav .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film) !important; }
  .closer, .foot-grid { flex-direction: column; align-items: flex-start; }
  .time-list li { grid-template-columns: 1fr; gap: 4px; }
}
@media (max-width: 767.98px) {
  .wall { columns: 1; }
  .quote-wall { grid-template-columns: 1fr; }
}
@media (max-width: 575.98px) {
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  body { font-size: 16px; }
  body.has-dock { padding-bottom: 132px; }
  .brand-name { font-size: 14.5px; }
  .hero-actions, .closer-actions { width: 100%; }
  .btn-film, .btn-line { width: 100%; justify-content: center; text-align: center; }
  .dock-inner { flex-direction: column; align-items: stretch; padding-top: 12px; padding-bottom: 12px; }
  .dock-actions { width: 100%; }
  .dock .btn-film { flex: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* roulang page: category1 */
:root {
  --ink: #1C1714;
  --paper: #F4EFE6;
  --film: #D9783C;
  --night: #2A211C;
  --mark: #B8456A;
  --pin: #3F6A55;
  --line: rgba(28,23,20,.16);
  --fog: rgba(244,239,230,.72);
  --sand: #EFE6D8;
  --card: #FFFDF8;
  --muted: rgba(28,23,20,.72);
  --shadow: 0 10px 28px rgba(28,23,20,.08);
  --shadow-hover: 0 16px 36px rgba(28,23,20,.14);
  --radius-card: 14px;
  --radius-img: 12px;
  --radius-input: 10px;
  --header-h: 72px;
  --max: 1120px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16.5px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; color: inherit; }
p { margin: 0 0 .85em; }
h1, h2, h3 {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  font-weight: 600;
  line-height: 1.35;
  color: inherit;
}
h1 { font-size: 46px; margin: 0 0 .35em; }
h2 { font-size: 28px; margin: 0 0 .55em; }
h3 { font-size: 19px; margin: 0 0 .4em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--film);
  outline-offset: 2px;
}
.container { max-width: var(--max); }
.meta { font-size: 13.5px; line-height: 1.7; color: var(--muted); letter-spacing: .02em; }
.sec-lead { font-size: 16.5px; color: var(--muted); margin-bottom: 0; max-width: 40em; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-h);
  background: rgba(244,239,230,.55);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-stuck {
  background: rgba(244,239,230,.94);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 20px rgba(28,23,20,.04);
}
.nav-shell { min-height: var(--header-h); display: flex; align-items: center; position: relative; }
.navbar {
  padding: 0;
  width: 100%;
  --bs-navbar-color: var(--ink);
  --bs-navbar-hover-color: var(--film);
  --bs-navbar-active-color: var(--ink);
  --bs-navbar-toggler-border-color: var(--line);
  --bs-navbar-padding-y: 0;
}
.brand { display: flex; flex-direction: column; line-height: 1.25; padding: 8px 0; }
.brand-name {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}
.brand-sub { font-size: 12px; letter-spacing: .22em; color: var(--pin); margin-top: 2px; }
.navbar-nav { align-items: center; gap: 0; }
.site-header .navbar-nav .nav-link {
  font-size: 15px;
  color: var(--ink);
  padding: 8px 16px;
  background: transparent;
  border-radius: 0;
  position: relative;
}
.site-header .navbar-nav .nav-item + .nav-item .nav-link { box-shadow: inset 1px 0 0 var(--line); }
.site-header .navbar-nav .nav-link:hover { color: var(--film); }
.site-header .navbar-nav .nav-link.is-active {
  box-shadow: inset 0 -2px 0 var(--film), inset 1px 0 0 var(--line);
}
.site-header .navbar-nav .nav-item:first-child .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film); }
.navbar-toggler {
  width: 46px;
  height: 46px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler-icon {
  width: 18px;
  height: 12px;
  background-size: 18px 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 12'%3E%3Cpath d='M0 1h18M0 6h18M0 11h18' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
}
.block { padding: 72px 0; }
.block.sand { background: var(--sand); }
.block.night { background: var(--night); color: var(--paper); }
.block.night .meta, .block.night .sec-lead { color: var(--fog); }
.band {
  background:
    radial-gradient(820px 240px at 8% 0%, rgba(217,120,60,.12), transparent 68%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}
.band-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 36px;
}
.band-note {
  flex: 0 0 280px;
  border-left: 1px solid var(--line);
  padding: 4px 0 4px 18px;
}
.band-note p { margin: 10px 0 0; font-size: 14px; line-height: 1.75; color: var(--muted); }
.btn {
  border-radius: 999px;
  padding: 12px 26px;
  font-size: 15px;
  line-height: 1.2;
  border: 1px solid transparent;
  box-shadow: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:focus { box-shadow: none; }
.btn-film { background: var(--film); color: var(--ink); border-color: var(--film); }
.btn-film:hover, .btn-film:active, .btn-film:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  transform: translateY(1px);
}
.btn-line {
  background: transparent;
  color: var(--paper);
  border-color: rgba(244,239,230,.45);
}
.btn-line:hover, .btn-line:active { background: var(--paper); color: var(--ink); transform: translateY(1px); }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  border-bottom: 1px solid var(--film);
  padding-bottom: 2px;
  font-size: 15px;
}
.text-link:hover { color: var(--film); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: .28em .72em;
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .14em;
  background: transparent !important;
  border: 1px solid rgba(63,106,85,.38);
  color: var(--pin);
  vertical-align: middle;
  --bs-badge-color: var(--pin);
}
.badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}
.badge.is-mark { color: var(--mark); border-color: rgba(184,69,106,.42); }
.badge.is-ink { color: var(--ink); border-color: var(--line); }
.badge.is-fog { color: var(--paper); border-color: rgba(244,239,230,.35); }
.vgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: stretch;
}
.vcard {
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 12px;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.vcard:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.shot {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-img);
  background: #E7DDD0;
}
.vcard .body { padding: 12px 6px 6px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.vcard h3 { font-size: 18px; }
.excerpt {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3.6em;
}
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.more-row { display: flex; justify-content: flex-end; margin: 22px 0 0; }
.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 22px;
  align-items: stretch;
}
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 16px;
  height: 100%;
}
.panel:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.panel .shot { margin-bottom: 14px; }
.scene-list li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.scene-list li:first-child { border-top: 0; padding-top: 4px; }
.scene-list strong { display: block; font-weight: 600; font-size: 16px; }
.scene-list span { font-size: 13.5px; color: var(--pin); letter-spacing: .04em; }
.tier { margin-top: 8px; }
.tier + .tier { margin-top: 18px; }
.tier-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 8px; }
.tier-top b { font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-size: 18px; font-weight: 600; }
.track {
  height: 8px;
  border-radius: 999px;
  background: rgba(28,23,20,.08);
  overflow: hidden;
}
.track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--film);
}
.track.is-mid i { width: 72%; background: #C46A38; }
.track.is-low i { width: 46%; background: #B8456A; }
.track.is-high i { width: 100%; }
.time { position: relative; margin-top: 8px; }
.time li {
  position: relative;
  padding: 0 0 22px 22px;
  border-left: 1px solid var(--line);
}
.time li:last-child { padding-bottom: 0; }
.time li::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mark);
}
.time time {
  display: block;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--pin);
}
.time p { margin: 2px 0 0; }
.reads li { border-top: 1px solid var(--line); padding: 16px 0; }
.reads li:first-child { border-top: 0; padding-top: 0; }
.reads a {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  font-size: 20px;
  border-bottom: 1px solid transparent;
}
.reads a:hover { color: var(--film); border-bottom-color: var(--film); }
.reads p { margin: 6px 0 0; }
.qa .accordion-item {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 6px 0;
}
.qa .accordion-item:first-child { border-top: 1px solid var(--line); }
.qa .accordion-item:has(.collapse.show) {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 8px 28px;
  align-items: start;
  box-shadow: inset 2px 0 0 var(--film);
  padding-left: 12px;
}
.qa .accordion-button {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  font-size: 18px;
  padding: 16px 8px 16px 4px;
  gap: 12px;
  line-height: 1.45;
}
.qa .accordion-button:not(.collapsed) { background: transparent; color: var(--ink); }
.qa .accordion-button:focus { box-shadow: none; }
.qa .accordion-button::after {
  width: 12px;
  height: 12px;
  background-size: 12px 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
}
.qa .accordion-body { padding: 16px 8px 16px 0; color: var(--muted); font-size: 15.5px; }
.qa .accordion-collapse.show { border-left: 1px solid var(--line); padding-left: 18px; }
.close-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.close-row h2 { margin-bottom: .3em; }
.close-row p { margin: 0; color: var(--fog); max-width: 38em; }
.site-footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: 36px 0 28px;
}
.foot-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.foot-nav { display: flex; flex-wrap: wrap; gap: 8px 0; }
.foot-nav a {
  color: var(--ink);
  font-size: 14.5px;
  padding: 4px 14px;
  box-shadow: inset 1px 0 0 var(--line);
}
.foot-nav a:first-child { box-shadow: none; padding-left: 0; }
.foot-nav a:hover { color: var(--film); }
.copyright { margin: 14px 0 0; font-size: 13px; color: var(--muted); }
.head-row { margin-bottom: 22px; max-width: 760px; }
@media (max-width: 991.98px) {
  .navbar-collapse {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: rgba(244,239,230,.98);
    border-bottom: 1px solid var(--line);
    padding: 6px 8px 16px;
  }
  .navbar-nav { align-items: stretch; }
  .site-header .navbar-nav .nav-link { padding: 14px 8px; font-size: 18px; }
  .site-header .navbar-nav .nav-item + .nav-item .nav-link { box-shadow: inset 0 1px 0 var(--line); }
  .site-header .navbar-nav .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film), inset 0 1px 0 var(--line); }
  .split, .qa .accordion-item:has(.collapse.show) { grid-template-columns: 1fr; }
  .qa .accordion-collapse.show { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 767.98px) {
  .vgrid, .band-row, .close-row, .foot-grid { display: block; }
  .band-note { border-left: 0; border-top: 1px solid var(--line); padding: 14px 0 0; margin-top: 16px; }
  .foot-nav { margin-top: 16px; }
  .close-row .btn { margin-top: 16px; }
}
@media (max-width: 575.98px) {
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  .block { padding: 48px 0; }
  .brand-name { font-size: 14px; }
  .scene-list li { grid-template-columns: 1fr; gap: 2px; }
  .close-row .btn, .more-row .text-link { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* roulang page: category2 */
:root {
 --ink: #1C1714;
 --paper: #F4EFE6;
 --film: #D9783C;
 --night: #2A211C;
 --mark: #B8456A;
 --pin: #3F6A55;
 --line: rgba(28,23,20,.16);
 --fog: rgba(244,239,230,.72);
 --sand: #EFE6D8;
 --card: #FFFDF8;
 --muted: rgba(28,23,20,.72);
 --shadow: 0 10px 28px rgba(28,23,20,.08);
 --shadow-hover: 0 16px 36px rgba(28,23,20,.14);
 --radius-card: 14px;
 --radius-img: 12px;
 --radius-input: 10px;
 --header-h: 72px;
 --max: 1120px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
 margin: 0;
 background: var(--paper);
 color: var(--ink);
 font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
 font-size: 16.5px;
 line-height: 1.8;
 text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; color: inherit; }
p { margin: 0 0 .85em; }
h1, h2, h3, h4 {
 font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
 font-weight: 600;
 line-height: 1.35;
 color: inherit;
 letter-spacing: 0;
}
h1 { font-size: 46px; margin: 0 0 12px; }
h2 { font-size: 28px; margin: 0 0 14px; }
h3 { font-size: 19px; margin: 0 0 8px; }
:focus { outline: none; }
:focus-visible {
 outline: 2px solid var(--film);
 outline-offset: 2px;
}
.container { max-width: var(--max); }
.meta { font-size: 13.5px; line-height: 1.7; color: var(--muted); letter-spacing: .02em; }
.site-header {
 position: sticky; top: 0; z-index: 50;
 min-height: var(--header-h);
 background: rgba(244,239,230,.55);
 transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-stuck {
 background: rgba(244,239,230,.94);
 border-bottom: 1px solid var(--line);
 box-shadow: 0 8px 20px rgba(28,23,20,.04);
}
.nav-shell { min-height: var(--header-h); display: flex; align-items: center; }
.brand { display: flex; flex-direction: column; line-height: 1.25; padding: 8px 0; }
.brand-name { font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif; font-size: 16px; font-weight: 600; color: var(--ink); }
.brand-sub { font-size: 12px; letter-spacing: .22em; color: var(--pin); margin-top: 2px; }
.navbar { padding: 0; width: 100%; }
.navbar-nav { align-items: center; gap: 0; }
.navbar-nav .nav-link {
 font-size: 15px;
 color: var(--ink);
 padding: 8px 16px;
 background: transparent;
 border-radius: 0;
 position: relative;
}
.navbar-nav .nav-item + .nav-item .nav-link { box-shadow: inset 1px 0 0 var(--line); }
.navbar-nav .nav-link:hover { color: var(--film); }
.navbar-nav .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film), inset 1px 0 0 var(--line); }
.navbar-nav .nav-item:first-child .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film); }
.navbar-toggler {
 width: 46px; height: 46px; border-radius: 999px;
 border: 1px solid var(--line); background: transparent;
 padding: 0; display: inline-flex; align-items: center; justify-content: center;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler-icon {
 width: 18px; height: 12px; background-size: 18px 12px;
 background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 12'%3E%3Cpath d='M0 1h18M0 6h18M0 11h18' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
}
.btn {
 border-radius: 999px;
 padding: 12px 26px;
 font-size: 15px;
 line-height: 1.2;
 border: 1px solid transparent;
 box-shadow: none;
 transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:focus { box-shadow: none; }
.btn-film { background: var(--film); color: var(--ink); border-color: var(--film); }
.btn-film:hover, .btn-film:active, .btn-film:focus-visible {
 background: var(--ink); color: var(--paper); border-color: var(--ink); transform: translateY(1px);
}
.btn-line {
 background: transparent; color: var(--paper); border-color: rgba(244,239,230,.45);
}
.btn-line:hover, .btn-line:active { background: var(--paper); color: var(--ink); transform: translateY(1px); }
.badge {
 display: inline-flex; align-items: center; gap: 6px;
 border-radius: 999px; padding: .28em .72em;
 font-weight: 500; font-size: 12px; letter-spacing: .14em;
 background: transparent; border: 1px solid rgba(63,106,85,.38); color: var(--pin);
 vertical-align: middle;
 --bs-badge-color: var(--pin);
}
.badge::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.badge.is-mark { color: var(--mark); border-color: rgba(184,69,106,.42); }
.badge.is-ink { color: var(--ink); border-color: var(--line); }
.badge.is-fog { color: var(--paper); border-color: rgba(244,239,230,.35); }
.band { padding: 72px 0; }
.band-sand {
 background-color: var(--sand);
 background-image: repeating-linear-gradient(0deg, transparent, transparent 22px, rgba(28,23,20,.045) 23px);
}
.band-night, .cat-head { background: var(--night); color: var(--paper); }
.band-night .meta, .cat-head .head-lead, .band-night .sec-lead { color: var(--fog); }
.sec-lead { font-size: 16.5px; color: var(--muted); margin-bottom: 22px; max-width: 640px; }
.cat-head { position: relative; overflow: hidden; padding: 64px 0 56px; }
.cat-head::before {
 content: "";
 position: absolute;
 width: 240px; height: 240px;
 right: 7%; top: -50px;
 border: 1px solid rgba(244,239,230,.16);
 border-radius: 50%;
 pointer-events: none;
}
.cat-head::after {
 content: "";
 position: absolute;
 width: 8px; height: 8px;
 right: calc(7% + 116px);
 top: 66px;
 background: var(--mark);
 border-radius: 50%;
 box-shadow: 0 0 0 6px rgba(184,69,106,.18);
 pointer-events: none;
}
.head-lead { font-size: 17px; max-width: 640px; margin-bottom: 22px; }
.zone-row { display: flex; flex-wrap: wrap; gap: 10px; }
.zone-chip {
 appearance: none;
 border-radius: 999px;
 border: 1px solid rgba(244,239,230,.38);
 background: transparent;
 color: var(--paper);
 padding: 8px 18px;
 letter-spacing: .16em;
 font-size: 14px;
 line-height: 1.2;
 cursor: pointer;
 transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.zone-chip:hover { border-color: var(--film); color: var(--film); }
.zone-chip.is-on {
 background: var(--film);
 border-color: var(--film);
 color: var(--ink);
}
.zone-chip.is-on:hover { color: var(--ink); transform: translateY(1px); }
.fall {
 display: grid;
 grid-template-columns: 1.42fr .86fr;
 gap: 22px 20px;
 align-items: start;
}
.vcard {
 background: var(--card);
 color: var(--ink);
 border: 1px solid var(--line);
 border-radius: var(--radius-card);
 box-shadow: var(--shadow);
 padding: 12px;
 transition: box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
.vcard:hover { box-shadow: var(--shadow-hover); border-color: rgba(28,23,20,.28); }
.sink { margin-top: 52px; }
.lift { margin-top: 18px; }
.sink-sm { margin-top: 28px; }
.frame {
 position: relative;
 background: #E6D9C8;
 border-radius: var(--radius-img);
 overflow: hidden;
}
.wide .frame { aspect-ratio: 16/9; }
.wide.ratio-32 .frame { aspect-ratio: 3/2; }
.slim .frame { aspect-ratio: 4/3; }
.frame::before {
 content: "";
 position: absolute; inset: 0;
 background-image: repeating-linear-gradient(135deg, transparent, transparent 11px, rgba(28,23,20,.05) 12px);
}
.frame::after {
 content: "";
 position: absolute; left: 12px; top: 12px;
 width: 8px; height: 8px; border-radius: 50%;
 background: var(--mark);
 box-shadow: 0 0 0 4px rgba(184,69,106,.22);
}
.vcard-body { padding: 12px 6px 6px; }
.vcard-body p { font-size: 15px; line-height: 1.75; margin-bottom: .4em; }
.vcard .meta { margin: 0; }
.more-row { margin-top: 26px; }
.more-link {
 display: inline-block;
 font-size: 15px;
 border-bottom: 1px solid var(--film);
 padding-bottom: 2px;
}
.more-link:hover { color: var(--film); }
.scene-list { list-style: none; margin: 8px 0 0; padding: 0; position: relative; }
.scene-list::before {
 content: "";
 position: absolute; left: 4px; top: 18px; bottom: 18px;
 width: 1px; background: var(--line);
}
.scene-list li {
 display: grid;
 grid-template-columns: 16px 1fr auto;
 gap: 8px 18px;
 align-items: start;
 padding: 18px 0;
 border-bottom: 1px solid var(--line);
}
.scene-list h3 { margin-bottom: 4px; }
.scene-list p { margin: 0; max-width: 640px; }
.dot {
 width: 9px; height: 9px; border-radius: 50%;
 background: var(--mark);
 margin-top: 10px;
 position: relative; z-index: 1;
 box-shadow: 0 0 0 4px var(--sand);
}
.when { font-size: 13.5px; color: var(--pin); letter-spacing: .08em; padding-top: 6px; white-space: nowrap; }
.dur-grid {
 display: grid;
 grid-template-columns: 1.2fr .8fr;
 gap: 18px;
 align-items: start;
}
.dur-card {
 background: var(--card);
 border: 1px solid var(--line);
 border-radius: var(--radius-card);
 box-shadow: var(--shadow);
 padding: 26px 24px 20px;
}
.dur-card.tall { min-height: 320px; }
.dur-card p:last-child { margin-bottom: 0; }
.dur-note { margin-top: 18px; }
.proof-list { list-style: none; margin: 6px 0 0; padding: 0; }
.proof-list li {
 display: grid;
 grid-template-columns: 92px 1fr;
 gap: 16px;
 align-items: center;
 padding: 18px 0;
 border-top: 1px solid var(--line);
}
.proof-list p { margin: 0; }
.text-picks { list-style: none; margin: 0; padding: 0; max-width: 740px; }
.text-picks li { padding: 22px 0; border-top: 1px solid var(--line); }
.text-picks li:last-child { border-bottom: 1px solid var(--line); }
.text-picks h3 { margin-bottom: 6px; }
.text-picks p { margin: 0; color: var(--muted); }
.qa .accordion { --bs-accordion-bg: transparent; --bs-accordion-border-color: transparent; --bs-accordion-btn-focus-box-shadow: none; }
.qa .accordion-item { background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.qa .accordion-item:has(.show) { box-shadow: inset 2px 0 0 var(--film); }
.qa .accordion-button {
 background: transparent; color: var(--ink); box-shadow: none;
 font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
 font-size: 18px; padding: 20px 8px 20px 14px; gap: 12px;
}
.qa .accordion-button:not(.collapsed) { background: transparent; color: var(--ink); box-shadow: none; }
.qa .accordion-button:focus { box-shadow: none; }
.qa .accordion-button::after {
 width: 14px; height: 14px; background-size: 14px;
 background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M2 5l5 5 5-5' fill='none' stroke='%231C1714' stroke-width='1.4'/%3E%3C/svg%3E");
}
.qa .accordion-body { padding: 0 18px 18px 16px; color: var(--muted); }
.close-row {
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 28px;
}
.close-row p { margin: 0; color: var(--fog); max-width: 560px; }
.site-footer { border-top: 1px solid var(--line); padding: 36px 0 28px; background: var(--paper); }
.foot-grid {
 display: flex; justify-content: space-between; gap: 24px; align-items: flex-start;
 padding-bottom: 18px; border-bottom: 1px solid var(--line);
}
.foot-nav { display: flex; flex-wrap: wrap; align-items: center; }
.foot-nav a { padding: 6px 14px; font-size: 14px; color: var(--ink); }
.foot-nav a + a { box-shadow: inset 1px 0 0 var(--line); }
.foot-nav a:hover { color: var(--film); }
.copyright { font-size: 13px; color: var(--muted); margin: 16px 0 0; }
@media (max-width: 991.98px) {
 .navbar-collapse {
 background: var(--paper);
 border-top: 1px solid var(--line);
 padding: 8px 0 18px;
 }
 .navbar-nav { align-items: stretch; width: 100%; }
 .navbar-nav .nav-link { padding: 14px 4px; font-size: 18px; }
 .navbar-nav .nav-item + .nav-item .nav-link { box-shadow: none; border-top: 1px solid var(--line); }
 .navbar-nav .nav-link.is-active { box-shadow: inset 0 -2px 0 var(--film); }
 .dur-grid { grid-template-columns: 1fr; }
 .dur-card.tall { min-height: 0; }
}
@media (max-width: 767.98px) {
 h1 { font-size: 32px; }
 h2 { font-size: 26px; }
 .band, .cat-head { padding: 48px 0; }
 .cat-head::before, .cat-head::after { display: none; }
 .fall { grid-template-columns: 1fr; }
 .sink, .lift, .sink-sm { margin-top: 0; }
 .close-row { flex-direction: column; align-items: flex-start; }
 .close-row .btn { width: 100%; text-align: center; }
 .foot-grid { flex-direction: column; }
 .proof-list li { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 575.98px) {
 .scene-list li { grid-template-columns: 16px 1fr; }
 .when { grid-column: 2; padding-top: 0; }
 .foot-nav a { padding: 8px 12px 8px 0; }
 .foot-nav a + a { box-shadow: none; }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}