/* ==========================================================================
   太阳鑫娱乐 / 太阳鑫会馆 — 共享样式 /assets/site.css
   0 变量与重置 · 1 中文排版 · 2 头部 · 3 页脚 · 4 通用组件 · 5 响应式 · 6 无障碍
   ========================================================================== */

/* ---------- 0. 变量与重置 ---------- */
:root {
  --ink: #1A1428;
  --ink-soft: #241C3A;
  --violet: #3B2E5A;
  --paper: #F3E8D6;
  --paper-bright: #F7F3EC;
  --rock: #4A4A4A;
  --gold: #F5A623;
  --gold-deep: #C97B0A;
  --sand: #E8C98A;
  --ochre: #8A5A2B;
  --blue: #1E90FF;
  --neon: #FF5C8A;

  --line-dark: rgba(232, 201, 138, 0.24);
  --line-light: rgba(74, 74, 74, 0.24);

  --font-display: "Source Han Sans SC", "Alibaba PuHuiTi", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell-max: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --gap: clamp(16px, 2.6vw, 32px);
  --sec-gap: clamp(64px, 9vw, 140px);
  --ease: 160ms ease;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper-bright);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select, textarea { font: inherit; }
[hidden] { display: none !important; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.01em;
}

/* ---------- 1. 中文排版工具 ---------- */
.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sand);
}

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
}
.prose > p + p { margin-top: 1em; }
.prose h2 { margin-top: 2.2em; font-size: clamp(22px, 2.6vw, 30px); }
.prose h3 { margin-top: 1.7em; font-size: 19px; }
.prose ul { margin-top: 1em; }
.prose li { position: relative; padding-left: 20px; margin-bottom: 0.5em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--gold);
}
.prose a {
  color: var(--blue);
  border-bottom: 1px solid rgba(30, 144, 255, 0.45);
  transition: border-color var(--ease), color var(--ease);
}
.prose a:hover { border-bottom-color: var(--blue); }
.section--paper .prose { color: var(--rock); }
.section--paper .prose a { color: #1666b3; border-bottom-color: rgba(22, 102, 179, 0.45); }

.band {
  height: 8px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-deep) 38%, var(--violet) 72%, var(--ink) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
}

/* ---------- 2. 头部：居中刊头 ---------- */
.skip-link {
  position: fixed;
  left: 50%;
  top: 0;
  transform: translate(-50%, -140%);
  z-index: 200;
  background: var(--gold);
  color: var(--ink);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  transition: transform var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}

/* 刊头 */
.masthead {
  position: relative;
  border-bottom: 1px solid var(--line-dark);
  background-image:
    radial-gradient(120% 220% at 50% -80%, rgba(245, 166, 35, 0.26), rgba(245, 166, 35, 0) 62%),
    repeating-linear-gradient(115deg, rgba(232, 201, 138, 0.07) 0 2px, rgba(232, 201, 138, 0) 2px 28px);
  background-color: var(--ink);
}

.masthead__inner {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 14px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
}

.masthead__side { display: flex; align-items: center; min-width: 0; }
.masthead__side--start { justify-content: flex-start; }
.masthead__side--end { justify-content: flex-end; }

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 4px 6px;
  justify-self: center;
  white-space: nowrap;
}
.brand__mark {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--gold);
  border: 1px solid var(--gold-deep);
  padding: 5px 6px;
  background: rgba(245, 166, 35, 0.08);
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.3vw, 28px);
  letter-spacing: 0.08em;
  color: var(--paper-bright);
  text-shadow: 0 0 1px rgba(245, 166, 35, 0.95), 0 0 16px rgba(245, 166, 35, 0.35);
}
.brand__version {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sand);
  border-left: 1px solid var(--line-dark);
  padding-left: 10px;
}

/* 登录反馈入口 */
.queue-entry {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border: 2px solid var(--gold-deep);
  background: rgba(245, 166, 35, 0.07);
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: border-color var(--ease), background-color var(--ease), color var(--ease);
}
.queue-entry:hover { border-color: var(--gold); background: rgba(245, 166, 35, 0.15); }
.queue-entry__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sand);
  border-left: 1px solid var(--line-dark);
  padding-left: 10px;
}

.queue-panel {
  position: absolute;
  right: var(--gutter);
  top: calc(100% - 6px);
  width: min(320px, calc(100vw - 2 * var(--gutter)));
  padding: 18px;
  background: var(--violet);
  border: 2px solid var(--gold-deep);
  border-top: 3px solid var(--gold);
  z-index: 80;
}
.queue-panel__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper-bright);
  margin-bottom: 8px;
}
.queue-panel__text { font-size: 13.5px; line-height: 1.7; color: var(--paper); }
.queue-panel__meta {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line-dark);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand);
}
.queue-panel__meta .mono { color: var(--gold); }
.queue-panel__foot { margin-top: 14px; }

/* 栏目条 */
.nav-bar {
  position: relative;
  background: rgba(26, 20, 40, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-bar__inner {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.primary-nav { display: block; }
.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
}
.nav-item { position: relative; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  font-size: 14.5px;
  color: var(--paper);
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}
.nav-link:hover,
.nav-item:focus-within > .nav-link {
  color: var(--gold);
  border-bottom-color: var(--gold-deep);
  background: rgba(245, 166, 35, 0.08);
}
.nav-link[aria-current="page"] {
  color: var(--gold);
  border-bottom-color: var(--gold);
  background: rgba(245, 166, 35, 0.12);
}
.nav-link__caret {
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-1px, -1px);
  opacity: 0.7;
}

.subnav {
  position: absolute;
  left: 50%;
  top: 100%;
  min-width: 190px;
  padding: 6px;
  background: var(--violet);
  border: 2px solid var(--gold-deep);
  border-top: 3px solid var(--gold);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -6px);
  transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
  z-index: 90;
}
.nav-item:hover > .subnav,
.nav-item:focus-within > .subnav {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
.subnav__link {
  display: block;
  padding: 9px 12px;
  font-size: 13.5px;
  color: var(--paper);
  border-left: 2px solid transparent;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}
.subnav__link:hover,
.subnav__link:focus-visible {
  color: var(--gold);
  background: rgba(245, 166, 35, 0.12);
  border-left-color: var(--neon);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 2px solid var(--line-dark);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  transition: border-color var(--ease), color var(--ease);
}
.nav-toggle:hover { border-color: var(--gold); color: var(--gold); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: var(--gold);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--gold);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold) 0%, var(--neon) 100%);
}

/* ---------- 3. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(80% 130% at 88% 0%, rgba(59, 46, 90, 0.9), rgba(59, 46, 90, 0) 62%),
    repeating-linear-gradient(96deg, rgba(232, 201, 138, 0.055) 0 2px, rgba(232, 201, 138, 0) 2px 32px);
}
.footer__stripe {
  position: relative;
  height: 8px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-deep) 34%, var(--violet) 68%, var(--ink) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 56%, 0 100%);
}
.footer__inner { position: relative; }

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(28px, 5vw, 64px);
  padding-block: clamp(40px, 6vw, 76px);
}
.footer__brandname {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: 0.08em;
  color: var(--paper-bright);
  text-shadow: 0 0 1px rgba(245, 166, 35, 0.85), 0 0 18px rgba(245, 166, 35, 0.28);
}
.footer__tagline {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sand);
}
.footer__update {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper);
}
.footer__update .mono { color: var(--gold); }
.footer__cta { margin-top: 18px; }

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer__col-title {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 12px;
}
.footer__links li + li { margin-top: 6px; }
.footer__links a {
  font-size: 14px;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.footer__links a:hover {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  padding-block: 20px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  font-size: 13px;
  color: var(--sand);
}
.footer__contact .mono { color: var(--paper-bright); }

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 26px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

/* ---------- 4. 通用组件 ---------- */
.section { padding-block: var(--sec-gap); }
.section--ink { background: var(--ink); color: var(--paper-bright); }
.section--violet { background: var(--violet); color: var(--paper-bright); }
.section--paper { background: var(--paper); color: var(--rock); }
.section--paper h2,
.section--paper h3 { color: var(--ink); }

.section__head { margin-bottom: clamp(28px, 4vw, 52px); }
.section__index {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.section__index::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--gold);
}
.section--paper .section__index { color: var(--ochre); }
.section--paper .section__index::before { background: var(--ochre); }
.section__title {
  margin-top: 14px;
  font-size: clamp(26px, 3.6vw, 44px);
  letter-spacing: 0.02em;
}
.section__lede {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 15px;
  color: inherit;
  opacity: 0.82;
}

.grid { display: grid; gap: var(--gap); }
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 2px solid var(--gold-deep);
  background: transparent;
  color: var(--gold);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: border-color var(--ease), background-color var(--ease), color var(--ease), transform var(--ease);
}
.btn:hover {
  border-color: var(--gold);
  background: rgba(245, 166, 35, 0.14);
  transform: translateY(-2px);
}
.btn--gold { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.btn--gold:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: var(--paper-bright); }
.btn--ghost { border-color: var(--line-dark); color: var(--paper); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue); background: rgba(30, 144, 255, 0.1); }
.btn--sm { padding: 8px 14px; font-size: 13px; }
.section--paper .btn { border-color: var(--ochre); color: var(--ochre); }
.section--paper .btn:hover { border-color: var(--gold-deep); background: rgba(201, 123, 10, 0.12); }
.section--paper .btn--gold { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.section--paper .btn--gold:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: var(--paper-bright); }

.glass-card {
  padding: clamp(18px, 2.4vw, 28px);
  background: rgba(59, 46, 90, 0.55);
  border: 2px solid var(--line-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--ease), background-color var(--ease), backdrop-filter var(--ease), -webkit-backdrop-filter var(--ease);
}
.glass-card:hover {
  border-color: var(--blue);
  background: rgba(59, 46, 90, 0.68);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.card {
  padding: clamp(18px, 2.2vw, 26px);
  border: 2px solid var(--line-light);
  background: rgba(247, 243, 236, 0.6);
  transition: border-color var(--ease), background-color var(--ease);
}
.card:hover { border-color: var(--blue); background: var(--paper-bright); }
.card--offset { margin-top: 32px; }
.section--ink .card,
.section--violet .card {
  background: rgba(59, 46, 90, 0.4);
  border-color: var(--line-dark);
  color: var(--paper-bright);
}

.num-plate {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5.2vw, 66px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.num-plate__unit {
  font-size: 0.32em;
  letter-spacing: 0.08em;
  color: var(--sand);
  margin-left: 8px;
}
.section--paper .num-plate { color: var(--gold-deep); }
.section--paper .num-plate__unit { color: var(--rock); }

.swatch-strip { display: flex; flex-wrap: wrap; gap: 6px; }
.swatch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 2px solid var(--line-dark);
  background: transparent;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: inherit;
  transition: border-color var(--ease), background-color var(--ease), color var(--ease);
}
.swatch::before {
  content: "";
  display: block;
  width: 9px;
  height: 9px;
  background: var(--swatch-color, var(--gold));
}
.swatch:hover { border-color: var(--blue); }
.swatch[aria-pressed="true"] {
  border-color: var(--gold);
  background: rgba(245, 166, 35, 0.16);
  color: var(--gold);
}
.section--paper .swatch { border-color: var(--line-light); }
.section--paper .swatch:hover { border-color: var(--blue); }
.section--paper .swatch[aria-pressed="true"] { color: var(--ochre); border-color: var(--gold-deep); background: rgba(201, 123, 10, 0.14); }

.timeline {
  display: grid;
  gap: 22px;
  border-left: 2px solid var(--line-dark);
  padding-left: 22px;
}
.timeline__item { position: relative; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--ink);
  border: 2px solid var(--gold);
}
.section--paper .timeline { border-left-color: var(--line-light); }
.section--paper .timeline__item::before { background: var(--paper); border-color: var(--gold-deep); }
.timeline__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sand);
}
.section--paper .timeline__label { color: var(--ochre); }

.media {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line-dark);
  aspect-ratio: 16 / 10;
  background-color: var(--ink-soft);
  background-image:
    linear-gradient(140deg, rgba(245, 166, 35, 0.22) 0%, rgba(59, 46, 90, 0.62) 52%, rgba(26, 20, 40, 0.95) 100%),
    repeating-linear-gradient(58deg, rgba(232, 201, 138, 0.12) 0 2px, rgba(232, 201, 138, 0) 2px 20px);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 8px 12px;
  background: rgba(26, 20, 40, 0.84);
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.section--paper .media { border-color: var(--line-light); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line-dark);
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.tag--neon { color: var(--neon); border-color: rgba(255, 92, 138, 0.5); }
.section--paper .tag { border-color: var(--line-light); color: var(--ochre); }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--sand);
}
.breadcrumbs a {
  color: var(--sand);
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.breadcrumbs a:hover { color: var(--blue); border-bottom-color: var(--blue); }
.breadcrumbs__sep { opacity: 0.5; }
.breadcrumbs [aria-current="page"] { color: var(--gold); }
.section--paper .breadcrumbs { color: var(--rock); }
.section--paper .breadcrumbs a { color: var(--rock); }
.section--paper .breadcrumbs a:hover { color: #1666b3; border-bottom-color: #1666b3; }

.anchor-list {
  display: grid;
  gap: 2px;
  border-left: 2px solid var(--line-dark);
  padding-left: 16px;
}
.anchor-list a {
  display: flex;
  gap: 10px;
  padding: 5px 0;
  font-size: 13.5px;
  color: var(--sand);
  transition: color var(--ease);
}
.anchor-list a:hover { color: var(--gold); }
.anchor-list a[aria-current="true"] { color: var(--blue); }
.anchor-list .mono { color: var(--gold-deep); }
.section--paper .anchor-list { border-left-color: var(--line-light); }
.section--paper .anchor-list a { color: var(--rock); }
.section--paper .anchor-list a:hover { color: var(--gold-deep); }

.link-line {
  border-bottom: 1px solid var(--line-dark);
  transition: color var(--ease), border-color var(--ease);
}
.link-line:hover { color: var(--gold); border-color: var(--gold); }

/* ---------- 5. 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 880px) {
  .masthead__side--start { display: none; }
  .masthead__inner {
    grid-template-columns: 1fr auto;
    gap: 10px;
    padding-block: 12px;
  }
  .brand { justify-self: start; }
  .masthead__side--end { justify-self: end; }
  .brand__version { display: none; }
  .queue-entry { padding: 6px 10px; font-size: 12px; }
  .queue-entry__num { font-size: 11px; padding-left: 8px; }

  .nav-bar__inner { justify-content: flex-end; min-height: 48px; }
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    padding: 8px var(--gutter) 18px;
    background: var(--ink-soft);
    border-top: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
  }
  .site-header[data-open] .primary-nav { display: block; }
  .primary-nav__list { display: block; }
  .nav-item { border-bottom: 1px solid var(--line-dark); }
  .nav-item:last-child { border-bottom: 0; }
  .nav-link {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 14px 8px;
    font-size: 15.5px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .nav-link:hover,
  .nav-item:focus-within > .nav-link,
  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--gold);
    background: rgba(245, 166, 35, 0.1);
  }
  .subnav {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    min-width: 0;
    padding: 0 0 10px 0;
    margin-left: 10px;
    border: 0;
    border-left: 2px solid var(--gold-deep);
    background: transparent;
  }
  .subnav__link { padding: 9px 12px; }

  .grid--7-5,
  .grid--8-4,
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .card--offset { margin-top: 0; }

  .footer__top { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
}

@media (max-width: 520px) {
  .footer__cols { grid-template-columns: minmax(0, 1fr); }
  .footer__contact { flex-direction: column; gap: 6px; }
  .footer__legal { flex-direction: column; }
  .brand__name { letter-spacing: 0.05em; }
  .queue-entry__label { display: none; }
  .queue-entry__num { border-left: 0; padding-left: 0; }
}

/* ---------- 6. 无障碍与减弱动效 ---------- */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}
.section--paper :focus-visible { outline-color: #1666b3; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .btn:hover { transform: none; }
}