/* ============================================================
   皇家国际中心 · 全站共享样式 /assets/site.css
   骨架：技术蓝图网格 + 娱乐场鎏金框景
   ============================================================ */

/* ---------- 1 · 设计令牌 ---------- */
:root {
  --c-ink: #140820;
  --c-ink-deep: #0E0518;
  --c-violet: #2B0F45;
  --c-violet-soft: #3B1760;
  --c-gold: #C9A227;
  --c-gold-bright: #F2D06B;
  --c-crimson: #6A1630;
  --c-pine: #143A32;
  --c-ivory: #F6F0E3;
  --c-mauve: #BFAFD0;
  --c-slate: #8A7A4A;
  --c-teal: #6FD2C4;

  --line-gold: rgba(201, 162, 39, .34);
  --line-gold-soft: rgba(201, 162, 39, .16);
  --line-cool: rgba(191, 175, 208, .2);

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shell-w: 1280px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --section-y: clamp(3rem, 7vw, 5.5rem);

  --fs-h1: clamp(2.4rem, 5vw, 3.6rem);
  --fs-h2: clamp(1.8rem, 3vw, 2.4rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.5rem);
  --fs-body: 1rem;
  --fs-data: .95rem;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shadow-1: 0 10px 24px rgba(8, 2, 16, .42);
  --shadow-2: 0 22px 48px rgba(8, 2, 16, .55);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 78px;
}

/* ---------- 2 · 重置与底色 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--c-ivory);
  background-color: var(--c-ink);
  background-image:
    linear-gradient(rgba(191, 175, 208, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(191, 175, 208, .055) 1px, transparent 1px),
    radial-gradient(120% 90% at 6% -18%, rgba(106, 22, 48, .42), transparent 58%),
    radial-gradient(100% 80% at 98% -12%, rgba(20, 58, 50, .46), transparent 56%);
  background-size: 72px 72px, 72px 72px, 100% 100%, 100% 100%;
  background-repeat: repeat, repeat, no-repeat, no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg,
video { max-width: 100%; display: block; }

button { font: inherit; color: inherit; }

a { color: var(--c-gold-bright); text-decoration: none; }
a:hover { color: var(--c-gold); }

[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--c-gold-bright);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: rgba(201, 162, 39, .42); color: var(--c-ivory); }

/* ---------- 3 · 排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.26;
  letter-spacing: .01em;
  margin: 0 0 .6em;
  color: var(--c-ivory);
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 1em; }

.mono,
.footer-line__mono,
.kpi__value,
.kpi__label { font-variant-numeric: tabular-nums; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-slate);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--line-gold);
}

.lede {
  margin: 0;
  max-width: 62ch;
  font-size: 1.06rem;
  color: var(--c-mauve);
}

.muted { color: var(--c-mauve); }

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, var(--line-gold), rgba(191, 175, 208, .12) 62%, transparent);
}

/* ---------- 4 · 布局骨架 ---------- */
.shell {
  width: min(100% - (var(--gutter) * 2), var(--shell-w));
  margin-inline: auto;
}

.section { padding-block: var(--section-y); }
.section--tight { padding-block: calc(var(--section-y) * .6); }

.section-head {
  margin-bottom: clamp(1.6rem, 3vw, 2.6rem);
  max-width: 70ch;
}
.section-head h2 { margin-bottom: .45rem; }
.section-head > :last-child { margin-bottom: 0; }

.page-head {
  padding-top: clamp(1.8rem, 5vw, 3.2rem);
  padding-bottom: clamp(1rem, 3vw, 1.8rem);
}
.page-title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  letter-spacing: .02em;
}
.page-lede {
  margin: 0;
  max-width: 64ch;
  color: var(--c-mauve);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.6rem);
}
.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)); }
.grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 5 · 蓝图框景与刻度 ---------- */
.blueprint {
  position: relative;
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(43, 15, 69, .68), rgba(20, 8, 32, .88));
}
.blueprint::before,
.blueprint::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--c-gold);
  pointer-events: none;
}
.blueprint::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-radius: var(--radius-lg) 0 0 0;
}
.blueprint::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
  border-radius: 0 0 var(--radius-lg) 0;
}

.scale-rule {
  position: relative;
  height: 12px;
  border-bottom: 1px solid var(--line-cool);
  background-image: repeating-linear-gradient(90deg, var(--line-gold-soft) 0 1px, transparent 1px 8px);
}
.scale-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--line-gold) 0 1px, transparent 1px 40px);
}

/* 滚动渐显协议 */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.has-js [data-reveal][data-visible] {
  opacity: 1;
  transform: none;
}

/* ---------- 6 · 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: .94rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease),
              background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease);
}
.btn--gold {
  background: linear-gradient(180deg, var(--c-gold-bright), var(--c-gold));
  border-color: rgba(242, 208, 107, .7);
  color: #2A1503;
  box-shadow: 0 8px 20px rgba(201, 162, 39, .26);
}
.btn--gold:hover,
.btn--gold:focus-visible {
  color: #2A1503;
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(201, 162, 39, .38);
}
.btn--ghost {
  background: rgba(201, 162, 39, .06);
  border-color: var(--line-gold);
  color: var(--c-gold-bright);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(201, 162, 39, .16);
  border-color: var(--c-gold-bright);
  color: var(--c-gold-bright);
}
.btn--sm { padding: .55rem 1.05rem; font-size: .86rem; }
.btn--block { width: 100%; padding-block: .8rem; font-size: .92rem; }

/* ---------- 7 · 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .24rem .7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cool);
  background: rgba(191, 175, 208, .06);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--c-mauve);
  white-space: nowrap;
}
.tag--gold {
  border-color: var(--line-gold);
  background: rgba(201, 162, 39, .12);
  color: var(--c-gold-bright);
}
.tag--crimson {
  border-color: rgba(190, 70, 105, .4);
  background: rgba(106, 22, 48, .5);
  color: #F0C7D3;
}
.tag--pine {
  border-color: rgba(111, 210, 196, .28);
  background: rgba(20, 58, 50, .6);
  color: var(--c-teal);
}

/* ---------- 8 · 卡片与数据块 ---------- */
.card {
  position: relative;
  padding: clamp(1.1rem, 2vw, 1.6rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--line-cool);
  background: linear-gradient(180deg, rgba(43, 15, 69, .5), rgba(20, 8, 32, .72));
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-gold);
  box-shadow: var(--shadow-2);
}
.card--flat:hover {
  transform: none;
  border-color: var(--line-cool);
  box-shadow: var(--shadow-1);
}
.card__title {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  color: var(--c-ivory);
}
.card__text {
  margin: 0;
  font-size: .95rem;
  color: var(--c-mauve);
}

.kpi {
  display: grid;
  gap: .3rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(111, 210, 196, .22);
  background: rgba(20, 58, 50, .3);
}
.kpi__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--c-slate);
}
.kpi__value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-gold-bright);
}

/* ---------- 9 · 图片容器 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-gold);
  background: linear-gradient(150deg, var(--c-violet) 0%, var(--c-ink) 72%);
}
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--16x10 { aspect-ratio: 16 / 10; }
.img-frame--4x3 { aspect-ratio: 4 / 3; }
.img-frame--3x4 { aspect-ratio: 3 / 4; }
.img-frame--21x9 { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame--placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(191, 175, 208, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(191, 175, 208, .08) 1px, transparent 1px);
  background-size: 32px 32px;
}

.img-frame__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, transparent 44%, rgba(14, 5, 24, .84)),
    radial-gradient(90% 70% at 10% 0%, rgba(242, 208, 107, .16), transparent 62%);
}
.img-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: .85rem 1rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-ivory);
}

/* ---------- 10 · 筛选协议 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
}
.filter-chip {
  appearance: none;
  padding: .52rem 1.05rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cool);
  background: rgba(191, 175, 208, .05);
  color: var(--c-mauve);
  font-family: var(--font-body);
  font-size: .88rem;
  line-height: 1.2;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease), transform .18s var(--ease);
}
.filter-chip:hover {
  color: var(--c-gold-bright);
  border-color: var(--line-gold);
  transform: translateY(-1px);
}
.filter-chip[aria-pressed="true"] {
  background: linear-gradient(180deg, var(--c-gold-bright), var(--c-gold));
  border-color: var(--c-gold-bright);
  color: #2A1503;
  font-weight: 600;
}

/* ---------- 11 · 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(1rem, 2vw, 1.6rem); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  color: var(--c-slate);
}
.breadcrumb__item::after {
  content: "/";
  color: rgba(138, 122, 74, .6);
}
.breadcrumb__item:last-child::after { display: none; }
.breadcrumb__link { color: var(--c-mauve); }
.breadcrumb__link:hover { color: var(--c-gold-bright); }
.breadcrumb__item--current { color: var(--c-gold-bright); }

/* ---------- 12 · 正文容器 ---------- */
.prose { max-width: 72ch; }
.prose h3 { margin-top: 2em; }
.prose p,
.prose ul,
.prose ol {
  margin-bottom: 1.1em;
  color: var(--c-mauve);
}
.prose strong { color: var(--c-ivory); }
.prose ul {
  margin: 0 0 1.1em;
  padding: 0;
  list-style: none;
}
.prose ul li {
  position: relative;
  padding-left: 1.35rem;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: .6rem;
  height: 1px;
  background: var(--c-gold);
}

/* ---------- 13 · 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 200;
  padding: .7rem 1.15rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--c-gold-bright), var(--c-gold));
  color: #2A1503;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); color: #2A1503; }

/* ---------- 14 · 悬浮胶囊页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: .85rem 0 .5rem;
  transition: padding .28s var(--ease);
}
.site-header[data-condensed] { padding-top: .4rem; }

.nav-shell {
  width: min(100% - (var(--gutter) * 1.4), calc(var(--shell-w) + 24px));
  margin-inline: auto;
}

.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .5rem .55rem .5rem 1rem;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-pill);
  background: linear-gradient(115deg, rgba(43, 15, 69, .95), rgba(20, 8, 32, .93));
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(246, 240, 227, .06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow .28s var(--ease), background .28s var(--ease);
}
.site-header[data-condensed] .nav-capsule {
  box-shadow: var(--shadow-2), inset 0 1px 0 rgba(246, 240, 227, .09);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  flex: 0 0 auto;
  color: var(--c-ivory);
}
.brand:hover { color: var(--c-ivory); }
.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--c-gold);
  background:
    radial-gradient(circle at 32% 26%, rgba(242, 208, 107, .85), rgba(201, 162, 39, .18) 46%, rgba(43, 15, 69, .92) 72%);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .12);
}
.brand__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  border: 1px solid var(--c-gold-bright);
  transform: translate(-50%, -50%) rotate(45deg);
}
.brand__text {
  display: grid;
  line-height: 1.16;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--c-ivory);
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .18em;
  color: var(--c-slate);
}

/* 导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: .15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list__item { list-style: none; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: .5rem .78rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--c-mauve);
  font-size: .92rem;
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-gold-bright);
  background: rgba(201, 162, 39, .1);
  border-color: var(--line-gold);
}
.nav-link[aria-current="page"] {
  color: #2A1503;
  background: linear-gradient(180deg, var(--c-gold-bright), var(--c-gold));
  border-color: var(--c-gold-bright);
  font-weight: 600;
}
.nav-note { display: none; }
.nav-panel-foot { display: none; }

/* 动作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex: 0 0 auto;
}
.nav-cta { flex: 0 0 auto; }

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line-gold);
  background: rgba(201, 162, 39, .08);
  cursor: pointer;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { background: rgba(201, 162, 39, .18); }
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  position: absolute;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--c-gold-bright);
  transition: transform .22s var(--ease), opacity .22s var(--ease), top .22s var(--ease);
}
.nav-toggle__bars {
  top: 50%;
  left: 50%;
  margin-top: -0.75px;
  transform: translateX(-50%);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  left: 0;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- 15 · 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3.5rem, 8vw, 6.5rem);
  border-top: 1px solid var(--line-gold);
  background: linear-gradient(180deg, rgba(20, 8, 32, .58), var(--c-ink-deep) 44%);
  color: var(--c-mauve);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--c-gold) 0 1px, transparent 1px 24px);
  opacity: .32;
}
.footer-shell {
  width: min(100% - (var(--gutter) * 2), var(--shell-w));
  margin-inline: auto;
  padding: clamp(2.2rem, 5vw, 3.6rem) 0 1.6rem;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2.2fr);
  gap: clamp(1.6rem, 4vw, 3rem);
}
.footer-brand__mark {
  display: block;
  width: 30px;
  height: 30px;
  margin-bottom: .85rem;
  border-radius: 50%;
  border: 1px solid var(--c-gold);
  background: radial-gradient(circle at 30% 25%, rgba(242, 208, 107, .8), rgba(43, 15, 69, .92) 68%);
}
.footer-brand__name {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: .14em;
  color: var(--c-ivory);
}
.footer-brand__tagline {
  margin: 0 0 .8rem;
  font-size: .92rem;
  color: var(--c-mauve);
}
.footer-brand__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1.9;
  letter-spacing: .08em;
  color: var(--c-slate);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2.2rem);
}
.footer-col__title {
  margin: 0 0 .9rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--line-cool);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: .1em;
  color: var(--c-gold-bright);
}
.footer-list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-list--plain { gap: .65rem; }
.footer-link {
  display: inline-block;
  color: var(--c-mauve);
  font-size: .92rem;
  transition: color .18s var(--ease), transform .18s var(--ease);
}
.footer-link:hover {
  color: var(--c-gold-bright);
  transform: translateX(2px);
}
.footer-link--sm { font-size: .82rem; }
.footer-line {
  margin: 0;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--c-mauve);
  overflow-wrap: anywhere;
}
.footer-line__mono {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--c-ivory);
  overflow-wrap: anywhere;
}
.footer-line--muted {
  font-size: .82rem;
  color: var(--c-slate);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem 1.6rem;
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-cool);
  font-size: .82rem;
  color: var(--c-slate);
}
.footer-copy,
.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: .06em;
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 16 · 平板与移动端 ---------- */
@media (max-width: 1080px) {
  .site-header { padding-top: .6rem; }
  .nav-capsule { gap: .6rem; padding: .45rem .45rem .45rem .85rem; }
  .nav-actions .nav-cta { display: none; }
  .nav-toggle { display: block; }

  .site-nav {
    position: absolute;
    top: calc(100% + .6rem);
    left: 0;
    right: 0;
    z-index: 5;
    display: grid;
    justify-content: stretch;
    gap: .15rem;
    padding: .85rem;
    max-height: calc(100vh - 8rem);
    overflow-y: auto;
    border: 1px solid var(--line-gold);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(43, 15, 69, .99), rgba(20, 8, 32, .99));
    box-shadow: var(--shadow-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s linear;
  }
  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: .2rem;
  }
  .nav-link {
    display: block;
    padding: .78rem .9rem;
    border-radius: var(--radius-sm);
    font-size: .98rem;
  }
  .nav-note {
    display: block;
    margin: .6rem .9rem 0;
    font-family: var(--font-mono);
    font-size: .72rem;
    letter-spacing: .12em;
    color: var(--c-slate);
  }
  .nav-panel-foot {
    display: block;
    margin-top: .6rem;
    padding-top: .85rem;
    border-top: 1px solid var(--line-cool);
  }
}

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

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .kpi__value { font-size: 1.3rem; }
}

@media (max-width: 520px) {
  .brand__tagline { display: none; }
  .brand__name { font-size: .95rem; letter-spacing: .08em; }
  .brand__mark { width: 32px; height: 32px; }
}

/* ---------- 17 · 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] {
    opacity: 1;
    transform: none;
  }
  .card:hover { transform: none; }
  .btn:hover { transform: none; }
}