/* ==========================================================================
   杏运娱乐 · 共享样式 /assets/site.css
   框架式导航：顶栏横梁 + 左侧栏目索引 + 右侧窄条 + 边框内滚动内容
   ========================================================================== */

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

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

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

ol, ul { padding: 0; }

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

button, input, select, textarea { font: inherit; color: inherit; }

[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid #F08A24;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 变量 ---------- */
:root {
  --apricot: #F08A24;
  --apricot-yellow: #F7C25B;
  --apricot-light: #FBE3BC;
  --paper: #FDF8F0;
  --sand: #F4EADA;
  --ink: #1D3B31;
  --moss: #3E6455;
  --sage: #6F8377;
  --coral: #E2705F;
  --amber: #B98A2E;

  --line: rgba(29, 59, 49, .14);
  --line-soft: rgba(29, 59, 49, .09);

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 11px;

  --header-h: 66px;
  --rail-left: 156px;
  --rail-right: 58px;

  --font-head: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", "Noto Sans Mono", monospace;

  --shadow-soft: 0 10px 30px rgba(29, 59, 49, .07);
  --shadow-lift: 0 16px 34px rgba(29, 59, 49, .13);

  --ease: cubic-bezier(.2, .7, .3, 1);
}

@media (min-width: 768px) {
  :root { --header-h: 76px; }
}

/* ---------- 基础排版 ---------- */
body {
  margin: 0;
  padding: var(--header-h) 0 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(900px 420px at 8% -6%, rgba(247, 194, 91, .22), transparent 62%),
    radial-gradient(700px 380px at 96% 4%, rgba(251, 227, 188, .30), transparent 60%);
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--ink);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(34px, 5.4vw, 56px); font-weight: 900; }
h2 { font-size: clamp(26px, 3.6vw, 42px); font-weight: 900; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--moss);
  text-decoration-color: rgba(62, 100, 85, .42);
  text-underline-offset: 3px;
}

a:hover { color: var(--ink); }

strong { color: var(--ink); font-weight: 800; }

::selection { background: var(--apricot-yellow); color: #3a2508; }

/* ---------- 元信息与工具类 ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}

.meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--sage);
  text-transform: uppercase;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 12px;
}

.stack > * + * { margin-top: 16px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -72px;
  left: 14px;
  z-index: 120;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: top .2s var(--ease);
}

.skip-link:focus { top: 12px; color: var(--paper); }

/* ---------- 顶栏（框架横梁） ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 60;
  background: rgba(253, 248, 240, .95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-bar {
  position: relative;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 100%;
  padding: 0 clamp(14px, 2.4vw, 26px);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px 14px 14px 6px;
  background: linear-gradient(140deg, var(--apricot) 0%, var(--apricot-yellow) 100%);
  color: #40270a;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
  transform: rotate(-4deg);
  box-shadow: 0 6px 16px rgba(240, 138, 36, .28);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .02em;
}

.brand-line {
  font-size: 11.5px;
  color: var(--sage);
  letter-spacing: .06em;
}

.version-badge {
  display: none;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 227, 188, .42);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--moss);
  white-space: nowrap;
}

.version-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--coral);
  flex: 0 0 auto;
}

.header-actions {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.quick-link:hover {
  background: var(--sand);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.quick-link--solid {
  background: linear-gradient(135deg, var(--apricot), var(--apricot-yellow));
  border-color: transparent;
  color: #40270a;
  box-shadow: 0 8px 18px rgba(240, 138, 36, .26);
}

.quick-link--solid:hover {
  background: linear-gradient(135deg, #e67f1c, #f5b843);
  color: #40270a;
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background .24s var(--ease);
}

.nav-toggle:hover { background: var(--sand); }

.nav-toggle-bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 17px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--moss);
}

.nav-toggle-label { line-height: 1; }

/* ---------- 栏目索引（移动端抽屉 / 桌面端左边框） ---------- */
.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  z-index: 70;
  width: min(84vw, 320px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 18px 28px;
  background: linear-gradient(180deg, #FDF8F0 0%, #F7EEDF 100%);
  border-right: 1px solid var(--line);
  box-shadow: 18px 0 40px rgba(29, 59, 49, .12);
  overflow-y: auto;
  transform: translateX(-104%);
  visibility: hidden;
  transition: transform .28s var(--ease), visibility .28s var(--ease);
}

.site-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
}

.nav-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--sage);
  text-transform: uppercase;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background .24s var(--ease), color .24s var(--ease);
}

.nav-list a:hover { background: var(--sand); }

.nav-no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--amber);
}

.nav-label { line-height: 1.45; }

.nav-list a[aria-current="page"] {
  background: linear-gradient(120deg, rgba(240, 138, 36, .18), rgba(247, 194, 91, .26));
  box-shadow: inset 0 0 0 1px rgba(240, 138, 36, .38);
}

.nav-list a[aria-current="page"] .nav-no { color: var(--apricot); }

.nav-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed rgba(29, 59, 49, .2);
  color: var(--sage);
  font-size: 11.5px;
}

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 65;
  background: rgba(29, 59, 49, .34);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease);
}

html[data-nav-open="true"] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 右侧窄条 ---------- */
.side-rail {
  display: none;
  position: fixed;
  right: 0;
  top: var(--header-h);
  bottom: 0;
  width: var(--rail-right);
  z-index: 55;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding-bottom: 24px;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(251, 227, 188, .38) 0%, rgba(253, 248, 240, .92) 70%);
}

.rail-btn,
.rail-link {
  writing-mode: vertical-rl;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), background .24s var(--ease);
}

.rail-btn:hover,
.rail-link:hover {
  background: var(--apricot-light);
  color: var(--ink);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.rail-text { line-height: 1; }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: var(--header-h);
  left: 0;
  z-index: 85;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--apricot), var(--apricot-yellow));
  pointer-events: none;
}

/* ---------- 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.container--narrow { max-width: 820px; }
.container--wide { max-width: 1420px; }

.page-section { padding: clamp(38px, 5vw, 72px) 0; }

.section--sand {
  background: var(--sand);
  border-block: 1px solid var(--line-soft);
}

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); align-items: start; }

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

/* ---------- 章节标题（大编号 + 小注释） ---------- */
.section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 26px;
}

.section-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--apricot);
}

.section-title {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 42px);
  font-weight: 900;
}

.section-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sage);
  margin-left: 2px;
}

.section-lede {
  margin: 10px 0 0;
  max-width: 68ch;
  color: var(--moss);
}

/* ---------- 摘要条 ---------- */
.summary-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  padding: 13px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(100deg, rgba(62, 100, 85, .10), rgba(247, 194, 91, .18));
  font-size: 14.5px;
  color: var(--moss);
}

.summary-bar strong { color: var(--ink); }

/* ---------- 档案卡片 ---------- */
.card {
  position: relative;
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.card--soft { background: linear-gradient(160deg, #fff 0%, var(--sand) 100%); }
.card--apricot { background: linear-gradient(150deg, var(--apricot-light) 0%, #fff 72%); }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.card-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--amber);
}

.card-body {
  margin: 12px 0 0;
  color: var(--moss);
  font-size: 16px;
}

.card-foot {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

@media (min-width: 900px) {
  .card--offset { transform: translateY(22px); }
}

/* ---------- 标签墙 ---------- */
.tag-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--moss);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), background .24s var(--ease);
}

.tag:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  color: var(--ink);
}

.tag--yellow { background: var(--apricot-yellow); border-color: transparent; color: #3a2508; }
.tag--green { background: rgba(62, 100, 85, .12); border-color: rgba(62, 100, 85, .28); color: var(--ink); }
.tag--coral { background: rgba(226, 112, 95, .14); border-color: rgba(226, 112, 95, .40); color: #8c3b2f; }

.tag-no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--amber);
}

/* ---------- 筛选条 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--moss);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background .24s var(--ease), color .24s var(--ease), transform .24s var(--ease);
}

.filter-btn:hover { background: var(--sand); transform: translateY(-2px); }

.filter-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

/* ---------- 折叠卡片 ---------- */
.disclosure {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  overflow: hidden;
}

.disclosure + .disclosure { margin-top: 12px; }

.disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.disclosure summary::-webkit-details-marker { display: none; }

.disclosure summary::after {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--apricot);
}

.disclosure[open] summary::after { content: "－"; }

.disclosure-body {
  padding: 0 20px 20px;
  color: var(--moss);
  font-size: 16px;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding-top: 18px;
  font-size: 13.5px;
  color: var(--sage);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li { display: inline-flex; align-items: center; }

.breadcrumbs li + li::before {
  content: "／";
  margin-right: 8px;
  color: rgba(29, 59, 49, .3);
}

.breadcrumbs a { color: var(--moss); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--ink); font-weight: 700; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), background .24s var(--ease);
}

.btn--primary {
  background: linear-gradient(135deg, var(--apricot), var(--apricot-yellow));
  color: #40270a;
  box-shadow: 0 10px 22px rgba(240, 138, 36, .28);
}

.btn--primary:hover { color: #40270a; transform: translateY(-2px); box-shadow: 0 14px 28px rgba(240, 138, 36, .34); }

.btn--ghost {
  background: transparent;
  border-color: rgba(29, 59, 49, .22);
  color: var(--ink);
}

.btn--ghost:hover { background: var(--sand); transform: translateY(-2px); }

.btn--quiet {
  background: var(--sand);
  color: var(--moss);
}

.btn--quiet:hover { background: var(--apricot-light); color: var(--ink); }

/* ---------- 图片容器（页面阶段放图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--apricot-light) 0%, var(--sand) 100%);
  aspect-ratio: 16 / 10;
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 88% at 82% 0%, rgba(247, 194, 91, .32), transparent 62%);
}

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

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--sage);
}

/* ---------- 入场显现 ---------- */
html[data-reveal="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

html[data-reveal="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 6vw, 80px);
  border-top: 1px solid var(--line);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: linear-gradient(180deg, #F7EEDF 0%, #F1E4CE 100%);
  color: var(--ink);
}

.footer-ridge {
  position: absolute;
  inset: -1px 0 auto 0;
  height: 58px;
  pointer-events: none;
  opacity: .55;
}

.footer-ridge svg { display: block; width: 100%; height: 100%; }

.footer-frame {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding: 62px 0 28px;
}

.footer-brand-name {
  margin: 14px 0 6px;
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: .02em;
}

.footer-tagline {
  margin: 0;
  color: var(--moss);
  font-size: 15px;
  max-width: 34ch;
}

.footer-badge {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  color: var(--amber);
  font-size: 12px;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.footer-col-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-links a {
  color: var(--moss);
  font-size: 15px;
  text-decoration: none;
}

.footer-links a:hover { color: var(--ink); text-decoration: underline; }

.footer-contact {
  padding: 22px 0 26px;
  border-top: 1px dashed rgba(29, 59, 49, .22);
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 9px;
  color: var(--moss);
  font-size: 15px;
}

.contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
}

.contact-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--amber);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 18px 0 32px;
  border-top: 1px solid var(--line);
}

.footer-legal,
.footer-note {
  margin: 0;
  font-size: 13.5px;
  color: var(--sage);
}

.footer-top-btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--moss);
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: background .24s var(--ease), transform .24s var(--ease);
}

.footer-top-btn:hover { background: var(--apricot-light); color: var(--ink); transform: translateY(-2px); }

/* ---------- 断点升级 ---------- */
@media (min-width: 640px) {
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .quick-link:nth-child(1),
  .quick-link:nth-child(2) { display: inline-flex; }

  .header-actions { display: flex; }
  .nav-toggle { margin-left: 0; }

  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: minmax(0, .95fr) minmax(0, 1.9fr); gap: 44px; }
}

@media (max-width: 767px) {
  .quick-link:nth-child(1),
  .quick-link:nth-child(2) { display: none; }

  .header-actions { display: flex; }
  .nav-toggle { margin-left: 0; }
}

@media (min-width: 1024px) {
  body { padding-right: var(--rail-right); }
  .side-rail { display: flex; }
  .version-badge { display: inline-flex; }
}

@media (min-width: 1140px) {
  body { padding-left: var(--rail-left); }

  .nav-toggle { display: none; }

  .nav-scrim { display: none; }

  .site-nav {
    width: var(--rail-left);
    transform: none;
    visibility: visible;
    box-shadow: none;
    padding: 26px 12px 20px;
    transition: none;
  }

  .site-nav[data-open] { transform: none; }

  .nav-list a {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 10px 12px;
    font-size: 15px;
  }

  .site-nav:not([data-open]) { pointer-events: auto; }
}

@media (min-width: 768px) and (max-width: 1139px) {
  .header-actions { margin-left: auto; }
  .nav-toggle { margin-left: 0; }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  html[data-reveal="on"] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .tag:hover,
  .btn:hover,
  .quick-link:hover,
  .rail-btn:hover,
  .rail-link:hover,
  .filter-btn:hover,
  .footer-top-btn:hover { transform: none; }

  .card--offset { transform: none; }
}