/* =========================================================
   澳门威尼娱乐 · /assets/site.css
   共享层：reset / 变量 / 头部 / 页脚 / 通用组件 / 响应式
   ========================================================= */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd, table, th, td { margin: 0; }
ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }
img, svg, video { max-width: 100%; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --c-red: #7B1113;
  --c-red-deep: #3D0A0B;
  --c-gold: #C8A24A;
  --c-gold-light: #E8C871;
  --c-gold-ink: #8A6A1E;
  --c-green: #0F3D2E;
  --c-orange: #E8792B;
  --c-ivory: #F6F0E6;
  --c-stone: #8A7A6D;
  --c-data-red: #D93A3A;
  --c-screen: #1FBF8F;

  --c-text: #2B1714;
  --c-text-soft: #6E5B4D;
  --c-line: rgba(43, 23, 20, .18);
  --c-line-gold: rgba(200, 162, 74, .5);

  --surface-page: var(--c-ivory);
  --surface-card: #FFFBF4;

  --font-head: 'Noto Serif SC', 'Songti SC', 'Source Han Serif SC', 'STSong', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-num: 'Roboto Mono', 'DIN Alternate', 'SFMono-Regular', Consolas, monospace;

  --step-display: clamp(3rem, 8vw, 7rem);
  --step-h1: clamp(2.2rem, 5vw, 3.5rem);
  --step-h2: clamp(1.7rem, 3.2vw, 2.4rem);
  --step-h3: clamp(1.12rem, 1.8vw, 1.4rem);
  --step-body: 1rem;
  --step-small: .875rem;
  --step-index: .75rem;

  --span: clamp(1.1rem, 4vw, 3.5rem);
  --maxw: 1240px;
  --maxw-narrow: 820px;
  --maxw-wide: 1440px;

  --shadow-card: 6px 6px 0 rgba(61, 10, 11, .16);
  --shadow-hard: 9px 9px 0 rgba(61, 10, 11, .2);
  --dur: .28s;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--surface-page);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.01em;
}
a { color: var(--c-red); text-underline-offset: 3px; }
a:hover { color: var(--c-gold-ink); }
:focus-visible { outline: 2px solid var(--c-orange); outline-offset: 3px; }
#main-content { display: block; scroll-margin-top: 6rem; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: .5rem;
  left: .5rem;
  z-index: 200;
  transform: translateY(-180%);
  background: var(--c-gold);
  color: var(--c-red-deep);
  border: 2px solid var(--c-red-deep);
  padding: .6rem 1rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 5. 头部框架 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-red-deep);
  color: var(--c-ivory);
  border-bottom: 3px solid var(--c-gold);
}
.header-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(.75rem, 2vw, 2rem);
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: .8rem var(--span);
}

.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; color: inherit; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  flex: 0 0 auto;
  border: 2px solid var(--c-gold);
  color: var(--c-gold-light);
  background: linear-gradient(150deg, rgba(200, 162, 74, .28), rgba(200, 162, 74, 0));
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.brand:hover .brand__mark { background: var(--c-gold); color: var(--c-red-deep); }
.brand__text { display: flex; flex-direction: column; line-height: 1.16; }
.brand__name { font-family: var(--font-head); font-size: clamp(1.02rem, 2.2vw, 1.35rem); font-weight: 800; letter-spacing: .06em; }
.brand__sub { font-family: var(--font-num); font-size: .62rem; letter-spacing: .24em; text-transform: uppercase; color: var(--c-gold); }

.header-index {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .35rem 1.1rem;
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .16em;
  color: rgba(246, 240, 230, .7);
}
.header-index__item { position: relative; padding-left: .95rem; }
.header-index__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: .34rem;
  height: .34rem;
  background: var(--c-gold);
  transform: translateY(-50%) rotate(45deg);
}

.header-actions { display: flex; align-items: center; gap: .6rem; }
.header-lang {
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .12em;
  color: rgba(246, 240, 230, .82);
  border: 1px solid rgba(200, 162, 74, .5);
  padding: .34rem .6rem;
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .45rem .7rem;
  background: transparent;
  border: 2px solid var(--c-gold);
  color: var(--c-gold-light);
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .14em;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle__bars { display: grid; gap: 5px; width: 18px; }
.nav-toggle__bars span { display: block; height: 2px; background: currentColor; transition: transform var(--dur) var(--ease); }
.nav-toggle[aria-expanded="true"] { background: var(--c-gold); color: var(--c-red-deep); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* 账本栏目条 */
.site-nav { position: relative; background: var(--c-red); border-top: 1px solid var(--c-line-gold); }
.site-nav__list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--span);
  list-style: none;
}
.site-nav__link {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: .55rem;
  padding: .85rem .6rem;
  border-left: 1px solid rgba(200, 162, 74, .3);
  color: rgba(246, 240, 230, .88);
  font-size: .95rem;
  letter-spacing: .12em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.site-nav__item:last-child .site-nav__link { border-right: 1px solid rgba(200, 162, 74, .3); }
.site-nav__idx { font-family: var(--font-num); font-size: var(--step-index); letter-spacing: .04em; color: var(--c-gold); }
.site-nav__link:hover { background: rgba(200, 162, 74, .18); color: #fff; }
.site-nav__link:hover .site-nav__idx { color: var(--c-gold-light); }
.site-nav__link[aria-current="page"] { background: var(--c-gold); color: var(--c-red-deep); }
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--c-red); }
.site-nav__foot { display: none; }

/* 抽屉遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 65;
  background: rgba(24, 6, 6, .64);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.nav-scrim[data-open] { opacity: 1; pointer-events: auto; }

/* 阅读进度 */
.progress { position: absolute; left: 0; right: 0; bottom: 0; height: 3px; pointer-events: none; }
.progress__bar { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--c-gold), var(--c-gold-light)); }

/* ---------- 6. 通用按钮 ---------- */
.btn {
  --btn-bg: var(--c-gold);
  --btn-fg: var(--c-red-deep);
  --btn-bd: var(--c-gold-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.3rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 2px solid var(--btn-bd);
  font-size: var(--step-small);
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 rgba(200, 162, 74, .35); }
.btn:active { transform: translate(0, 0); box-shadow: none; }
.btn--gold { background: var(--c-gold); color: var(--c-red-deep); border-color: var(--c-gold-light); }
.btn--ghost { background: transparent; color: var(--c-gold-light); border-color: var(--c-gold); }
.btn--ghost:hover { background: var(--c-gold); color: var(--c-red-deep); box-shadow: 5px 5px 0 rgba(232, 200, 113, .25); }
.btn--orange { background: var(--c-orange); color: #FFF6EC; border-color: var(--c-orange); }
.btn--sm { padding: .42rem .85rem; font-size: var(--step-index); letter-spacing: .1em; }
.btn--block { width: 100%; }

/* ---------- 7. 版心与区块 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--span); }
.wrap--narrow { max-width: var(--maxw-narrow); }
.wrap--wide { max-width: var(--maxw-wide); }

.section { position: relative; padding: clamp(3rem, 7vw, 6rem) 0; }
.section--paper { background: var(--c-ivory); color: var(--c-text); }
.section--dark {
  --c-text: var(--c-ivory);
  --c-text-soft: rgba(246, 240, 230, .72);
  --c-line: rgba(200, 162, 74, .38);
  background: var(--c-red-deep);
  color: var(--c-ivory);
}
.section--red {
  --c-text: var(--c-ivory);
  --c-text-soft: rgba(246, 240, 230, .76);
  --c-line: rgba(200, 162, 74, .4);
  background: var(--c-red);
  color: var(--c-ivory);
}
.section--green {
  --c-text: var(--c-ivory);
  --c-text-soft: rgba(246, 240, 230, .74);
  --c-line: rgba(200, 162, 74, .36);
  background: var(--c-green);
  color: var(--c-ivory);
}
.section--dark .kicker, .section--red .kicker, .section--green .kicker { color: var(--c-gold-light); }
.section--dark .stat, .section--red .stat, .section--green .stat {
  background: rgba(246, 240, 230, .06);
  border-color: rgba(200, 162, 74, .42);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.1rem;
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
  border-bottom: 2px solid var(--c-line);
}
.section-title { font-family: var(--font-head); font-weight: 800; font-size: var(--step-h2); line-height: 1.15; }
.lede { max-width: 62ch; font-size: clamp(1rem, 1.3vw, 1.12rem); color: var(--c-text-soft); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-gold-ink);
}
.kicker::before { content: ""; width: 2.2rem; height: 2px; background: currentColor; }

.display {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--step-display);
  line-height: .98;
  letter-spacing: -.02em;
}
.display__outline { -webkit-text-stroke: 2px var(--c-gold); color: transparent; }
@supports not (-webkit-text-stroke: 1px #000) { .display__outline { color: var(--c-gold); } }

/* ---------- 8. 档案组件 ---------- */
.folder {
  position: relative;
  padding: 2.3rem 1.4rem 1.4rem;
  background: var(--surface-card);
  border: 2px solid var(--c-red-deep);
}
.folder__tab {
  position: absolute;
  top: -2px;
  left: 1.1rem;
  transform: translateY(-100%);
  padding: .34rem .9rem;
  background: var(--c-red);
  color: var(--c-gold-light);
  border: 2px solid var(--c-red-deep);
  border-bottom: 0;
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .16em;
}

.card {
  position: relative;
  padding: 1.4rem;
  background: var(--surface-card);
  border: 2px solid var(--c-red-deep);
  box-shadow: var(--shadow-card);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow-hard); }
.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding-bottom: .8rem;
  margin-bottom: .9rem;
  border-bottom: 1px solid var(--c-line);
}
.card__title { font-family: var(--font-head); font-size: var(--step-h3); font-weight: 800; }
.card__body { font-size: var(--step-small); color: var(--c-text-soft); }

.stat {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.1rem 1.2rem;
  background: var(--surface-card);
  border: 2px solid var(--c-line);
}
.stat__value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-red);
}
.stat__label { font-family: var(--font-num); font-size: var(--step-index); letter-spacing: .18em; text-transform: uppercase; color: var(--c-text-soft); }
.stat--gold .stat__value { color: var(--c-gold-ink); }
.stat--data .stat__value { color: var(--c-data-red); }
.section--dark .stat__value, .section--red .stat__value, .section--green .stat__value { color: var(--c-gold-light); }

/* ---------- 9. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .28rem .62rem;
  border: 1px solid var(--c-line-gold);
  background: rgba(200, 162, 74, .12);
  color: var(--c-gold-ink);
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .12em;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.tag:hover { background: var(--c-gold); color: var(--c-red-deep); transform: translateY(-1px); }
.tag--green { border-color: rgba(15, 61, 46, .45); background: rgba(15, 61, 46, .1); color: var(--c-green); }
.tag--green:hover { background: var(--c-green); color: var(--c-ivory); }
.tag--orange { border-color: rgba(232, 121, 43, .5); background: rgba(232, 121, 43, .12); color: #A64E12; }
.tag--orange:hover { background: var(--c-orange); color: #FFF6EC; }
.tag--live { border-color: rgba(31, 191, 143, .55); background: rgba(31, 191, 143, .12); color: #0B6B4E; }
.tag--live::before { content: ""; width: .4rem; height: .4rem; background: var(--c-screen); }
.tag--region { border-style: dashed; border-color: rgba(200, 162, 74, .6); background: rgba(200, 162, 74, .14); color: var(--c-gold-light); }
.section--paper .tag--region, body > .tag--region { color: var(--c-gold-ink); }

/* ---------- 10. 账本表格 ---------- */
.ledger-scroll { overflow-x: auto; border: 2px solid var(--c-red-deep); background: var(--surface-card); }
.ledger { width: 100%; min-width: 560px; font-size: var(--step-small); background: var(--surface-card); }
.ledger th, .ledger td { padding: .75rem .9rem; text-align: left; border-bottom: 1px solid var(--c-line); }
.ledger thead th {
  background: var(--c-red);
  color: var(--c-gold-light);
  border-bottom: 2px solid var(--c-gold);
  font-family: var(--font-num);
  font-size: var(--step-index);
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  white-space: nowrap;
}
.ledger tbody tr { transition: background var(--dur) var(--ease); }
.ledger tbody tr:hover { background: rgba(200, 162, 74, .12); }
.ledger td.num, .ledger th.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; text-align: right; }
.ledger tbody tr:last-child td { border-bottom: 0; }

/* ---------- 11. 图像容器 ---------- */
.figure { margin: 0; }
.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 2px solid var(--c-red-deep);
  background: linear-gradient(140deg, var(--c-red-deep) 0%, #1C0506 55%, var(--c-green) 100%);
}
.figure__frame::after {
  content: "";
  position: absolute;
  inset: .55rem;
  border: 1px solid rgba(200, 162, 74, .45);
  pointer-events: none;
}
.figure__frame > img,
.figure__frame > svg,
.figure__frame > video { display: block; width: 100%; height: 100%; object-fit: cover; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure__cap {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin-top: .7rem;
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .1em;
  color: var(--c-text-soft);
}
.figure__cap::before { content: "图"; color: var(--c-gold); font-family: var(--font-head); }

/* ---------- 12. 面包屑与栅格 ---------- */
.breadcrumbs {
  padding: 1rem 0;
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .12em;
  color: var(--c-text-soft);
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; }
.breadcrumbs li { display: flex; gap: .5rem; }
.breadcrumbs li + li::before { content: "/"; color: var(--c-gold); }
.breadcrumbs a { color: inherit; text-decoration: none; border-bottom: 1px solid transparent; transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.breadcrumbs a:hover { color: var(--c-red); border-bottom-color: var(--c-gold); }
.breadcrumbs [aria-current="page"] { color: var(--c-text); font-weight: 700; }

.grid { display: grid; gap: clamp(1rem, 2.2vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  background: var(--c-red-deep);
  color: var(--c-ivory);
  border-top: 3px solid var(--c-gold);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--span) clamp(1.5rem, 3vw, 2.5rem);
}
.footer-brand__name { font-family: var(--font-head); font-size: 1.5rem; font-weight: 800; letter-spacing: .06em; }
.footer-brand__sub { margin-top: .3rem; font-family: var(--font-num); font-size: .64rem; letter-spacing: .28em; text-transform: uppercase; color: var(--c-gold); }
.footer-brand__desc { margin-top: .9rem; max-width: 34ch; font-size: var(--step-small); color: rgba(246, 240, 230, .7); }
.footer-brand .tag { margin-top: 1.1rem; }

.footer-col__title {
  margin-bottom: 1rem;
  font-family: var(--font-num);
  font-size: var(--step-index);
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-gold);
}
.footer-col__list { display: flex; flex-direction: column; gap: .6rem; list-style: none; }
.footer-link {
  position: relative;
  display: inline-block;
  font-size: var(--step-small);
  color: rgba(246, 240, 230, .82);
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--c-gold-light);
  transition: width var(--dur) var(--ease);
}
.footer-link:hover { color: var(--c-gold-light); transform: translateX(3px); }
.footer-link:hover::after { width: 100%; }
.footer-link[aria-current="page"] { color: var(--c-gold-light); }

.footer-info { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem; font-size: var(--step-small); color: rgba(246, 240, 230, .85); }
.footer-info__key { min-width: 2.6rem; font-family: var(--font-num); font-size: .68rem; letter-spacing: .18em; color: var(--c-gold); }
.footer-info__val { font-family: var(--font-num); word-break: break-all; color: var(--c-ivory); }
.copy-btn {
  padding: .2rem .5rem;
  background: transparent;
  border: 1px solid rgba(200, 162, 74, .6);
  color: var(--c-gold-light);
  font-family: var(--font-num);
  font-size: .68rem;
  letter-spacing: .12em;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-red-deep); }
.copy-btn[data-copied] { background: var(--c-screen); border-color: var(--c-screen); color: #062A20; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.4rem;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.1rem var(--span) 1.6rem;
  border-top: 1px solid rgba(200, 162, 74, .32);
  font-family: var(--font-num);
  font-size: var(--step-index);
  letter-spacing: .1em;
  color: rgba(246, 240, 230, .6);
}

/* ---------- 14. 滚动显现 ---------- */
[data-reveal] { transition: opacity .55s var(--ease), transform .55s var(--ease); }
.has-js [data-reveal]:not(.is-visible) { opacity: 0; transform: translateY(18px); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 15. 响应式 ---------- */
@media (min-width: 768px) and (max-width: 1023px) {
  .header-index { display: none; }
  .site-nav__link { gap: .35rem; padding: .7rem .4rem; font-size: .82rem; letter-spacing: .06em; }
}

@media (max-width: 1023px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .header-bar { grid-template-columns: 1fr auto; gap: .6rem; padding: .7rem var(--span); }
  .header-index { display: none; }
  .header-cta { display: none; }
  .header-lang { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 70;
    display: flex;
    flex-direction: column;
    width: min(86vw, 340px);
    max-width: none;
    padding-top: 4.8rem;
    overflow-y: auto;
    background: var(--c-red-deep);
    border-top: 0;
    border-left: 3px solid var(--c-gold);
    transform: translateX(102%);
    visibility: hidden;
    transition: transform .34s var(--ease), visibility 0s linear .34s;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition: transform .34s var(--ease), visibility 0s;
  }
  .site-nav__list { grid-template-columns: 1fr; max-width: none; padding: 0; }
  .site-nav__link {
    justify-content: flex-start;
    gap: .9rem;
    padding: 1rem 1.4rem;
    border-left: 0;
    border-bottom: 1px solid rgba(200, 162, 74, .22);
    font-size: 1.05rem;
  }
  .site-nav__item:last-child .site-nav__link { border-right: 0; }
  .site-nav__link[aria-current="page"] { background: var(--c-gold); color: var(--c-red-deep); }
  .site-nav__foot { display: flex; flex-direction: column; gap: .6rem; margin-top: auto; padding: 1.4rem; }
  .site-nav__foot-link {
    padding-bottom: .35rem;
    border-bottom: 1px dashed rgba(200, 162, 74, .5);
    color: var(--c-gold-light);
    font-size: .88rem;
    letter-spacing: .12em;
    text-decoration: none;
    transition: color var(--dur) var(--ease);
  }
  .site-nav__foot-link:hover { color: #fff; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.8rem; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 768px) {
  .nav-scrim { display: none; }
}

@media (max-width: 900px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .folder { padding: 2rem 1rem 1rem; }
}

/* ---------- 16. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .has-js [data-reveal]:not(.is-visible) { opacity: 1; transform: none; }
  .btn:hover, .card:hover, .tag:hover, .footer-link:hover { transform: none; }
}