/* ============================================================
   皇家娱乐中心 · 共享样式表  /assets/site.css
   框架式导航 + 数据叙事：皇家深紫底、鎏金边框、等宽索引
   ============================================================ */

/* ---------- 01 · reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dt, dd {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ---------- 02 · 设计变量 ---------- */
:root {
  --ink-950: #150C26;
  --ink-900: #1E1233;
  --ink-800: #2C1B4A;
  --gold: #C9A24A;
  --gold-lift: #EBD08A;
  --peacock: #2AA3A8;
  --peacock-deep: #16707A;
  --amber: #E08A3C;
  --text: #EDE8F6;
  --text-dim: #B9AEDA;
  --paper: #F4F1FA;
  --line: #3B2E5C;
  --hairline: rgba(201, 162, 74, 0.32);
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --wrap: 1240px;
  --edge: clamp(20px, 5vw, 96px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.22s;
  --radius: 2px;
}

/* ---------- 03 · 中文排版与页面基底 ---------- */
body {
  min-height: 100%;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 10% -12%, rgba(44, 27, 74, 0.95), transparent 68%),
    radial-gradient(880px 520px at 102% 4%, rgba(22, 112, 122, 0.18), transparent 64%),
    linear-gradient(180deg, #1E1233 0%, #1B102E 100%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

/* 暗调大厅俯视网格：极低对比的仪表盘肌理 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(to right, rgba(59, 46, 92, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(59, 46, 92, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(120% 82% at 50% 0%, #000 22%, transparent 76%);
  mask-image: radial-gradient(120% 82% at 50% 0%, #000 22%, transparent 76%);
}

/* 框架式导航的左框线 */
body::after {
  content: "";
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  z-index: 45;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(201, 162, 74, 0.38) 12%, rgba(201, 162, 74, 0.38) 88%, transparent);
}

main { position: relative; z-index: 1; display: block; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

::selection { background: rgba(201, 162, 74, 0.35); color: #fff; }

/* ---------- 04 · 通用容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--edge);
}

.section {
  position: relative;
  padding-block: clamp(56px, 8vw, 112px);
  border-top: 1px solid var(--line);
}

.section__head { display: grid; gap: 10px; margin-bottom: clamp(24px, 3vw, 44px); }

.section__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--peacock);
  text-transform: uppercase;
}

.section__title { font-size: clamp(24px, 2.6vw, 28px); color: var(--text); }

.section__note { color: var(--text-dim); font-size: 15px; max-width: 42em; }

.lede { font-size: 17px; line-height: 1.85; color: var(--text-dim); max-width: 34em; }

.prose { max-width: 38em; color: var(--text); }
.prose p + p { margin-top: 1em; }
.prose h2 { margin: 1.6em 0 0.6em; font-size: 24px; }
.prose h3 { margin: 1.4em 0 0.5em; font-size: 19px; }
.prose ul { list-style: none; margin: 0.8em 0; }
.prose ul li { position: relative; padding-left: 1.3em; }
.prose ul li::before { content: ""; position: absolute; left: 0.2em; top: 0.72em; width: 6px; height: 1px; background: var(--gold); }

.rule { height: 1px; border: 0; background: var(--line); }
.rule--gold { background: linear-gradient(90deg, var(--gold), rgba(201, 162, 74, 0)); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 32px);
}
.grid--tight { gap: clamp(12px, 1.4vw, 20px); }
.grid > * { grid-column: 1 / -1; }

.stack { display: grid; gap: 16px; }
.stack--lg { gap: clamp(24px, 3vw, 40px); }

/* ---------- 05 · 头部框架 ---------- */
.skip-link {
  position: absolute;
  left: var(--edge);
  top: 8px;
  z-index: 60;
  padding: 10px 18px;
  border-radius: var(--radius);
  background: var(--gold-lift);
  color: #241705;
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(180deg, rgba(21, 12, 38, 0.97), rgba(30, 18, 51, 0.93));
  border-bottom: 1px solid var(--hairline);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(201, 162, 74, 0.6), transparent);
}

.site-header__inner {
  position: relative;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 12px var(--edge);
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand__mark {
  flex: none;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--gold-lift);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.35);
}

.brand__text { display: grid; gap: 1px; min-width: 0; }

.brand__link {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.brand__link:hover { color: var(--gold-lift); }

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 9px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: rgba(44, 27, 74, 0.55);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--gold); color: var(--gold-lift); }

.nav-toggle__bars { position: relative; width: 18px; height: 10px; flex: none; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1px;
  background: var(--gold);
  transition: transform var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(4.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-4.5px) rotate(-45deg); }

.site-nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: 45;
  padding: 6px var(--edge) 26px;
  background: var(--ink-950);
  border-bottom: 1px solid var(--hairline);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.5);
}
.site-header[data-open] .site-nav { display: block; }

.site-nav__list { display: grid; }
.site-nav__item { border-bottom: 1px solid var(--line); }

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  font-size: 16px;
  color: var(--text-dim);
  transition: color var(--dur) var(--ease);
}
.site-nav__link:hover { color: var(--text); }
.site-nav__link[aria-current="page"] { color: var(--gold-lift); }

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--peacock);
}
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--gold); }

.frame-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--peacock), var(--gold) 55%, var(--gold-lift));
  opacity: 0.9;
}

/* ---------- 06 · 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 9vw, 140px);
  background: var(--ink-950);
  border-top: 1px solid var(--hairline);
  color: var(--text-dim);
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(201, 162, 74, 0.45), transparent);
}

.site-footer__top {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(44px, 6vw, 84px) var(--edge) clamp(30px, 4vw, 56px);
  display: grid;
  gap: clamp(28px, 3vw, 48px);
  grid-template-columns: 1fr;
}

.footer-col { display: grid; gap: 14px; align-content: start; }

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}

.footer-brand__line { font-size: 14px; line-height: 1.8; max-width: 30em; color: var(--text-dim); }

.footer-list { display: grid; gap: 8px; }

.footer-list__link {
  font-size: 14px;
  color: var(--text-dim);
  transition: color var(--dur) var(--ease);
  display: inline-block;
}
.footer-list__link:hover { color: var(--gold-lift); }

.footer-contact { display: grid; gap: 10px; }
.footer-contact__row { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: baseline; }

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--peacock);
  white-space: nowrap;
}

.footer-contact__val { font-size: 14px; color: var(--text); overflow-wrap: anywhere; }

.footer-contact__note { font-size: 13px; line-height: 1.75; color: var(--text-dim); max-width: 30em; }

.copy-btn {
  margin-left: 8px;
  padding: 3px 9px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  vertical-align: middle;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover { background: rgba(201, 162, 74, 0.12); border-color: var(--gold); }

.site-footer__base {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 20px var(--edge) 30px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
}

.site-footer__copy { color: var(--text-dim); }
.site-footer__legal { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--text-dim); }

/* ---------- 07 · 面包屑 ---------- */
.crumbs {
  position: relative;
  z-index: 1;
  border-bottom: 1px solid var(--line);
}
.crumbs__list {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 16px var(--edge);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.crumbs__item { display: flex; align-items: center; gap: 8px; }
.crumbs__link { color: var(--text-dim); transition: color var(--dur) var(--ease); }
.crumbs__link:hover { color: var(--gold-lift); }
.crumbs__sep { color: rgba(201, 162, 74, 0.5); }
.crumbs__current { color: var(--gold-lift); }

/* ---------- 08 · 面板与数据组件 ---------- */
.panel {
  position: relative;
  display: grid;
  gap: 14px;
  align-content: start;
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(44, 27, 74, 0.92), rgba(21, 12, 38, 0.95));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.02), 0 12px 30px rgba(0, 0, 0, 0.22);
}

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

.panel__title { font-family: var(--font-display); font-size: 20px; font-weight: 600; color: var(--text); }

.panel--paper {
  background: linear-gradient(170deg, #F7F5FC, var(--paper));
  color: #2A1F45;
  border-color: rgba(201, 162, 74, 0.45);
}
.panel--paper .panel__label { color: #6A5B8C; }
.panel--paper .panel__title { color: #241705; }

.stat { display: grid; gap: 4px; align-content: start; }

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--gold-lift);
}

.stat--hero .stat__value { font-size: clamp(52px, 8.5vw, 64px); }

.stat__unit { font-family: var(--font-mono); font-size: 16px; color: var(--peacock); margin-left: 6px; }

.stat__label { font-size: 13px; color: var(--text-dim); letter-spacing: 0.02em; }

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }

.data-table { width: 100%; min-width: 520px; font-size: 14.5px; }
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gold);
  background: rgba(21, 12, 38, 0.6);
}
.data-table tr:last-child td { border-bottom: 0; }
.data-table td { color: var(--text-dim); }
.panel--paper .data-table th,
.panel--paper .data-table td { border-color: rgba(30, 18, 51, 0.18); }
.panel--paper .data-table th { background: rgba(30, 18, 51, 0.06); color: #3D2F63; }
.panel--paper .data-table td { color: #3A2E58; }

/* ---------- 09 · 标签、筛选与按钮 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--hairline); }
.chip[aria-pressed="true"] {
  color: var(--gold-lift);
  border-color: var(--gold);
  background: rgba(201, 162, 74, 0.12);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.tag--gold { color: var(--gold-lift); border-color: var(--hairline); }
.tag--peacock { color: var(--peacock); border-color: rgba(42, 163, 168, 0.45); }
.tag--amber { color: var(--amber); border-color: rgba(224, 138, 60, 0.45); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.2;
  color: var(--text);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.btn--gold {
  background: linear-gradient(180deg, #D8B055, var(--gold));
  border-color: var(--gold-lift);
  color: #241705;
  font-weight: 600;
}
.btn--gold:hover { background: linear-gradient(180deg, var(--gold-lift), #D4AB52); }

.btn--ghost { color: var(--gold-lift); border-color: rgba(201, 162, 74, 0.45); }
.btn--ghost:hover { border-color: var(--gold-lift); background: rgba(201, 162, 74, 0.1); }

.btn--quiet { padding-inline: 4px; border-color: transparent; color: var(--text-dim); }
.btn--quiet:hover { color: var(--gold-lift); }

/* ---------- 10 · 图形容器（供页面阶段放置图片） ---------- */
.figure {
  position: relative;
  display: grid;
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(44, 27, 74, 0.9), rgba(21, 12, 38, 0.96));
}

.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 90% at 16% 10%, rgba(42, 163, 168, 0.22), transparent 60%),
    radial-gradient(90% 80% at 88% 94%, rgba(201, 162, 74, 0.2), transparent 62%),
    repeating-linear-gradient(115deg, rgba(59, 46, 92, 0.55) 0 1px, transparent 1px 26px);
}
.figure__frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(201, 162, 74, 0.2);
  pointer-events: none;
}
.figure__frame img { width: 100%; height: 100%; object-fit: cover; }

.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--tall .figure__frame { aspect-ratio: 3 / 4; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }

.figure__overlay {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 5px 10px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: rgba(21, 12, 38, 0.78);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gold-lift);
}

.figure__caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 11 · 折叠内容组 ---------- */
.fold { border-top: 1px solid var(--line); }
.fold:last-child { border-bottom: 1px solid var(--line); }

.fold__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 0;
  text-align: left;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}
.fold__trigger:hover { color: var(--gold-lift); }
.fold__trigger::after {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: -4px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}
.fold[data-open] .fold__trigger::after { transform: rotate(-135deg); margin-top: 4px; }

.fold__panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.28s var(--ease), visibility 0s linear 0.28s;
}
.fold[data-open] .fold__panel {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.28s var(--ease), visibility 0s linear 0s;
}
.fold__body { min-height: 0; overflow: hidden; }
.fold__body > * { padding-bottom: 22px; max-width: 38em; color: var(--text-dim); }

/* ---------- 12 · 显现动效协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-reveal="in"] { opacity: 1; transform: none; }

/* ---------- 13 · 平板 ---------- */
@media (min-width: 720px) {
  .site-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .brand__tagline { font-size: 11px; }
}

/* ---------- 14 · 桌面：导航横排成框 ---------- */
@media (min-width: 960px) {
  .site-header__inner { min-height: 84px; padding-block: 14px; }

  .nav-toggle { display: none; }

  .site-nav {
    display: block;
    position: static;
    padding: 0;
    border: 0;
    background: none;
    box-shadow: none;
  }

  .site-nav__list { display: flex; align-items: center; gap: clamp(10px, 1.8vw, 28px); }
  .site-nav__item { border: 0; }

  .site-nav__link { position: relative; padding: 12px 2px; font-size: 15px; }
  .site-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 4px;
    height: 1px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--dur) var(--ease);
  }
  .site-nav__link:hover::after { transform: scaleX(1); }
  .site-nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--gold-lift); }

  .grid > .span-4 { grid-column: span 4; }
  .grid > .span-5 { grid-column: span 5; }
  .grid > .span-6 { grid-column: span 6; }
  .grid > .span-7 { grid-column: span 7; }
  .grid > .span-8 { grid-column: span 8; }
  .grid > .span-12 { grid-column: span 12; }
}

@media (min-width: 1080px) {
  .site-footer__top { grid-template-columns: 1.5fr 1fr 1fr 1.3fr; }
}

/* ---------- 15 · 小屏收敛 ---------- */
@media (max-width: 959px) {
  body::after { display: none; }
  html { scroll-padding-top: 84px; }
}

@media (max-width: 560px) {
  .brand__mark { width: 32px; height: 32px; font-size: 15px; }
  .brand__link { font-size: 17px; }
  .brand__tagline { max-width: 46vw; }
  .site-footer__base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 16 · 降低动效 ---------- */
@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;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .fold__panel { transition: none; }
  .frame-progress { transition: none; }
}