/* ============================================================
   万博指南 · 共享样式 /assets/site.css
   夜航棋牌室 × 电玩厅档案室
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

ul, ol { list-style: none; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

/* ---------- 2. Design tokens ---------- */
:root {
  /* 色彩 */
  --c-ink: #0B1B2B;
  --c-velvet: #123A32;
  --c-deep: #050E18;
  --c-neon: #35E0C0;
  --c-gold: #E8B44A;
  --c-coral: #FF6B4A;
  --c-cream: #F3EBDD;
  --c-brown: #2A1F18;
  --c-gray: #6C8296;
  --c-pale: #A8D8D0;

  --line-soft: rgba(168, 216, 208, 0.18);
  --line-mid: rgba(168, 216, 208, 0.32);
  --line-gold: rgba(232, 180, 74, 0.42);

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字阶 64 / 40 / 28 / 20 / 17 / 14 */
  --fs-1: clamp(2.4rem, 5.4vw, 4rem);
  --fs-2: clamp(1.75rem, 3.4vw, 2.5rem);
  --fs-3: clamp(1.35rem, 2.2vw, 1.75rem);
  --fs-4: 1.25rem;
  --fs-5: 1.0625rem;
  --fs-6: 0.875rem;

  --lh-display: 1.15;
  --lh-body: 1.85;
  --track-display: 0.04em;
  --track-body: 0.01em;
  --track-mono: 0.02em;

  /* 网格与节奏 */
  --shell: 1200px;
  --gutter: 24px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 28px;
  --space-lg: 48px;
  --space-xl: 80px;

  --notch: 6px;
  --header-h: 132px;
}

/* ---------- 3. 基础排版（中文） ---------- */
html { font-size: 100%; }

body {
  background-color: var(--c-ink);
  background-image:
    radial-gradient(120% 80% at 78% -10%, rgba(53, 224, 192, 0.10) 0%, rgba(11, 27, 43, 0) 58%),
    radial-gradient(90% 60% at 4% 100%, rgba(18, 58, 50, 0.55) 0%, rgba(11, 27, 43, 0) 60%);
  background-attachment: fixed;
  color: var(--c-cream);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: var(--lh-body);
  letter-spacing: var(--track-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

p { max-width: 68ch; }

strong { font-weight: 700; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: var(--lh-display);
  letter-spacing: var(--track-display);
}

::selection {
  background: var(--c-gold);
  color: var(--c-deep);
}

#main-content { scroll-margin-top: 140px; }

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 300;
  display: inline-block;
  padding: 10px 18px;
  background: var(--c-coral);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
}

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

/* ---------- 5. 头部 / 居中刊头导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, #0B1B2B 0%, #091724 100%);
  border-bottom: 1px solid var(--line-soft);
  box-shadow: 0 18px 40px -32px rgba(0, 0, 0, 0.9);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(168, 216, 208, 0.10);
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-neon) 0%, var(--c-gold) 100%);
  transition: width 0.12s linear;
}

.header-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 0;
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-bottom: 14px;
}

.masthead-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--c-pale);
}

.masthead-meta--left { justify-content: flex-start; }
.masthead-meta--right { justify-content: flex-end; }

.mono-tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--line-soft);
  color: var(--c-pale);
  white-space: nowrap;
}

.masthead-brand { text-align: center; }

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.8vw, 2.125rem);
  line-height: 1.1;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  color: var(--c-cream);
  transition: font-size 0.18s ease;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--c-gold);
  white-space: nowrap;
}

.util-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-pale);
  padding: 4px 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.util-link:hover {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin: 0 auto 12px;
  padding: 10px 18px;
  border: 1px solid var(--line-mid);
  color: var(--c-pale);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.nav-toggle:hover { color: var(--c-neon); border-color: var(--c-neon); }

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
}

.nav-toggle-bars { position: relative; }

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[data-open] { color: var(--c-coral); border-color: var(--c-coral); }

/* 栏目行 */
.site-nav {
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--line-soft);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-item { position: relative; }

.nav-link {
  display: block;
  padding: 14px 20px;
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
  color: var(--c-pale);
  white-space: nowrap;
  transition: color 0.16s ease, background-color 0.16s ease;
}

.nav-link:hover {
  color: var(--c-cream);
  background: rgba(53, 224, 192, 0.08);
}

.nav-link[aria-current="page"] { color: var(--c-gold); }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  background: var(--c-gold);
}

.header-rule {
  height: 1px;
  background: linear-gradient(90deg, rgba(232, 180, 74, 0) 0%, var(--line-gold) 50%, rgba(232, 180, 74, 0) 100%);
}

/* 滚动后收拢 */
.site-header[data-scrolled] .header-shell { padding-top: 10px; }
.site-header[data-scrolled] .masthead { padding-bottom: 8px; }
.site-header[data-scrolled] .brand-mark { font-size: clamp(1.25rem, 2.2vw, 1.625rem); }
.site-header[data-scrolled] .brand-tagline { color: rgba(232, 180, 74, 0.75); }
.site-header[data-scrolled] .nav-link { padding: 10px 20px; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: var(--space-xl);
  background: var(--c-deep);
  color: var(--c-pale);
  border-top: 1px solid var(--line-gold);
}

.footer-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px var(--gutter) 32px;
  display: grid;
  grid-template-columns: 1.1fr 2fr;
  gap: 40px;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.16em;
  color: var(--c-cream);
}

.footer-domain {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--c-neon);
}

.footer-est {
  margin-top: 14px;
  max-width: 22em;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(168, 216, 208, 0.72);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--c-pale);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-link:hover {
  color: var(--c-cream);
  border-bottom-color: var(--c-neon);
}

.footer-contact {
  background: rgba(18, 58, 50, 0.42);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.footer-contact-line {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-family: var(--font-mono);
  font-size: 0.78125rem;
  letter-spacing: 0.02em;
  color: var(--c-pale);
  max-width: var(--shell);
}

.footer-contact-item { display: inline-block; }

.footer-legal {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--gutter) 44px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: rgba(168, 216, 208, 0.62);
}

.footer-legal-line { max-width: none; }

/* ---------- 7. 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container--narrow { max-width: 820px; }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-md);
}

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

.section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.rule-line {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(168, 216, 208, 0) 0%, var(--line-mid) 50%, rgba(168, 216, 208, 0) 100%);
}

.ink-surface { background: var(--c-deep); }
.velvet-surface { background: var(--c-velvet); }

.paper-surface {
  background: var(--c-cream);
  color: var(--c-brown);
}

.paper-surface h1,
.paper-surface h2,
.paper-surface h3,
.paper-surface h4 { color: var(--c-brown); }

/* ---------- 8. 文字组件 ---------- */
.display-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-1);
  line-height: var(--lh-display);
  letter-spacing: var(--track-display);
  color: var(--c-cream);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-2);
  line-height: var(--lh-display);
  letter-spacing: var(--track-display);
  color: var(--c-cream);
}

.section-title--paper { color: var(--c-brown); }

.lede {
  font-size: var(--fs-5);
  line-height: 1.85;
  color: var(--c-pale);
  max-width: 34em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  display: block;
  width: 22px;
  height: 1px;
  background: var(--c-gold);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- 9. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-cream);
  background: transparent;
  border: 1px solid var(--line-mid);
  transition: transform 0.16s ease, background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.btn--primary {
  background: var(--c-coral);
  border-color: var(--c-coral);
  color: var(--c-deep);
  font-weight: 700;
}

.btn--primary:hover {
  background: #ff8266;
  border-color: #ff8266;
  color: var(--c-deep);
}

.btn--ghost {
  border-color: var(--line-gold);
  color: var(--c-gold);
}

.btn--ghost:hover {
  background: rgba(232, 180, 74, 0.12);
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.71875rem;
  letter-spacing: 0.12em;
  border: 1px solid currentColor;
  color: var(--c-pale);
}

.tag--gold { color: var(--c-gold); }
.tag--neon { color: var(--c-neon); }
.tag--coral { color: var(--c-coral); }

.panel {
  position: relative;
  background: rgba(9, 22, 36, 0.86);
  border: 1px solid var(--line-soft);
  padding: var(--space-md);
  transition: transform 0.16s ease, opacity 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.panel:hover {
  transform: translateY(-2px);
  border-color: rgba(53, 224, 192, 0.45);
}

.panel-notch {
  clip-path: polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, 0 100%);
}

.stack:hover .panel:not(:hover) { opacity: 0.62; }

.stat-block {
  display: inline-block;
  padding: 12px 0;
  border-top: 1px solid var(--c-gold);
  border-bottom: 1px solid var(--c-gold);
}

.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.875rem, 3.2vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-pale);
}

.archive-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid rgba(168, 216, 208, 0.12);
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.archive-row:hover {
  background: rgba(53, 224, 192, 0.06);
  border-bottom-color: rgba(53, 224, 192, 0.4);
}

.archive-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}

.archive-body {
  font-size: var(--fs-5);
  color: var(--c-cream);
  max-width: none;
}

.archive-data {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--c-neon);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.table {
  width: 100%;
  font-size: 0.9375rem;
}

.table caption {
  text-align: left;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--c-gray);
}

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(42, 31, 24, 0.16);
}

.table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  background: var(--c-velvet);
  color: var(--c-pale);
  border-bottom-color: rgba(168, 216, 208, 0.28);
}

.table tbody tr { transition: background-color 0.16s ease; }
.table tbody tr:hover { background: rgba(232, 180, 74, 0.16); }

.cell-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-brown);
  white-space: nowrap;
}

.breadcrumb { padding: 22px 0 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--c-gray);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(168, 216, 208, 0.38);
}

.breadcrumb-item a { color: var(--c-pale); }
.breadcrumb-item a:hover { color: var(--c-neon); }
.breadcrumb-item[aria-current="page"] { color: var(--c-gold); }

.prose {
  max-width: 68ch;
  font-size: var(--fs-5);
  line-height: var(--lh-body);
}

.prose p { max-width: none; }
.prose p + p { margin-top: 1.1em; }

.prose h2 {
  margin-top: 2em;
  font-size: var(--fs-3);
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 0.03em;
}

.prose h3 {
  margin-top: 1.6em;
  font-size: var(--fs-4);
  font-family: var(--font-display);
  font-weight: 800;
}

.prose ul {
  margin-top: 1em;
}

.prose ul li {
  position: relative;
  padding-left: 1.3em;
  margin-top: 0.6em;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9em;
  width: 9px;
  height: 1px;
  background: var(--c-gold);
}

.prose strong { color: var(--c-gold); }

.paper-surface .prose strong { color: #A8501F; }
.paper-surface .prose ul li::before { background: var(--c-brown); }

.media-frame {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(18, 58, 50, 0.85) 0%, rgba(5, 14, 24, 0.95) 100%);
  border: 1px solid var(--line-soft);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(53, 224, 192, 0.06) 0%, rgba(5, 14, 24, 0.35) 100%);
  pointer-events: none;
}

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--c-gray);
  max-width: 46em;
}

/* ---------- 10. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s ease, transform 0.32s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-link { padding: 13px 14px; font-size: 0.90625rem; }
  .nav-link[aria-current="page"]::after { left: 14px; right: 14px; }
}

@media (max-width: 960px) {
  :root { --gutter: 20px; --space-xl: 60px; }

  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 10px;
    padding-bottom: 12px;
  }

  .masthead-brand { order: -1; }

  .masthead-meta { font-size: 0.6875rem; justify-content: center; }
  .masthead-meta--left,
  .masthead-meta--right { justify-content: center; }

  .brand-tagline { white-space: normal; text-align: center; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.24s ease, opacity 0.2s ease;
  }

  .site-nav[data-open] {
    max-height: 70vh;
    overflow-y: auto;
    opacity: 1;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .nav-item {
    border-bottom: 1px solid rgba(168, 216, 208, 0.1);
  }

  .nav-link { padding: 14px 6px; }

  .nav-link[aria-current="page"]::after {
    left: 6px;
    right: 6px;
  }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8 { grid-column: span 6; }

  .footer-shell {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 44px;
  }

  .site-header[data-scrolled] .nav-link { padding: 12px 6px; }
}

@media (max-width: 600px) {
  :root { --gutter: 16px; --space-xl: 48px; }

  .grid-12 { grid-template-columns: 1fr; gap: 20px; }
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 { grid-column: span 1; }

  .footer-nav { grid-template-columns: 1fr; gap: 26px; }
  .footer-legal { padding-bottom: 36px; }
  .footer-contact-line { font-size: 0.75rem; gap: 8px 18px; }

  .archive-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .archive-data { white-space: normal; }

  .stat-block { display: block; }

  .table th,
  .table td { padding: 11px 12px; }
}

/* ---------- 12. 减弱动效 ---------- */
@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;
    transform: none;
  }

  .btn:hover,
  .panel:hover { transform: none; }

  .stack:hover .panel:not(:hover) { opacity: 1; }
}