/* ============================================================
   /assets/site.css — HTH登录入口 共享外壳样式
   夜蓝堆叠面板 · 1px 精密网格 · 荧光青 / 活力橙 / 琥珀黄
   ============================================================ */

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

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

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

ul, ol { list-style: none; }

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

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

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --bg: #060B18;
  --panel: #0C1730;
  --panel-2: #142348;
  --line: #22335C;

  --ink: #EEF3FB;
  --ink-2: #93A6C4;

  --cyan: #29E7C8;
  --cyan-2: #86F7E4;
  --orange: #FF7A2F;
  --amber: #FFC24D;

  --cyan-a08: rgba(41, 231, 200, 0.08);
  --cyan-a16: rgba(41, 231, 200, 0.16);
  --orange-a16: rgba(255, 122, 47, 0.16);

  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "Roboto Condensed", "Oswald", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "DejaVu Sans Mono", monospace;

  --shell: 1320px;
  --pad: 32px;
  --rail: 72px;

  --t-fast: 0.16s ease;
  --t-mid: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (max-width: 720px) {
  :root { --pad: 20px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, rgba(34, 51, 92, 0.24) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 51, 92, 0.24) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 { font-size: clamp(30px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3.2vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 28px); }
h4 { font-size: 18px; }

p { margin-bottom: 1.05em; }
p:last-child { margin-bottom: 0; }

strong { font-weight: 500; color: var(--ink); }

.prose {
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
}

.prose p { margin-bottom: 1.15em; }

.key-line {
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
  font-weight: 500;
}

.num,
.stat__num,
.index-row__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.muted { color: var(--ink-2); }

a.link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-a16);
  transition: color var(--t-fast), border-color var(--t-fast);
}

a.link:hover { color: var(--cyan-2); border-bottom-color: var(--cyan-2); }

hr.hairline {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 26px 0;
}

::selection { background: var(--cyan); color: #04121A; }

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  padding: 12px 20px;
  background: var(--cyan);
  color: #04121A;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

/* ---------- 5. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  z-index: 6;
}

/* 5.1 信号条 */
.hdr-rail {
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}

.hdr-rail__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
  min-height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.signal {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--cyan);
}

.signal__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(41, 231, 200, 0.55);
  animation: sig-pulse 2.4s ease-out infinite;
}

@keyframes sig-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(41, 231, 200, 0.55); }
  70%  { box-shadow: 0 0 0 7px rgba(41, 231, 200, 0); }
  100% { box-shadow: 0 0 0 0 rgba(41, 231, 200, 0); }
}

.hdr-rail__meta { white-space: nowrap; }

/* 5.2 品牌行 */
.hdr-brand { background: var(--bg); }

.hdr-brand__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 15px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: padding var(--t-mid);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand__mark {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 16px;
  background: var(--cyan);
  color: #04121A;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.06em;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: height var(--t-mid), padding var(--t-mid);
}

.brand__text { display: block; min-width: 0; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.15;
  color: var(--ink);
  white-space: nowrap;
}

.brand__tag {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hdr-brand__side {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}

.hdr-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  padding-right: 14px;
  border-right: 1px solid var(--line);
  white-space: nowrap;
}

/* 5.3 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
}

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

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--cyan);
}

.nav-toggle__bars { position: relative; }

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

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header.is-nav-open { border-bottom-color: var(--cyan); }
.site-header.is-nav-open .nav-toggle { border-color: var(--cyan); color: var(--cyan); }

/* 5.4 栏目行 */
.hdr-nav {
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.hdr-nav__list {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
  display: flex;
  align-items: stretch;
}

.hdr-nav__item + .hdr-nav__item { border-left: 1px solid var(--line); }

.hdr-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 13px 22px;
  border-top: 2px solid transparent;
  color: var(--ink-2);
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}

.hdr-nav__link:hover {
  color: var(--ink);
  background: var(--cyan-a08);
  border-top-color: var(--cyan);
}

.hdr-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: var(--cyan-a08);
  border-top-color: var(--cyan);
}

.hdr-nav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  transition: color var(--t-fast);
}

.hdr-nav__link:hover .hdr-nav__idx,
.hdr-nav__link[aria-current="page"] .hdr-nav__idx { color: var(--cyan); }

/* 5.5 收缩态 */
.site-header.is-condensed .hdr-rail { display: none; }
.site-header.is-condensed .hdr-brand__inner { padding: 8px var(--pad); }
.site-header.is-condensed .brand__mark { height: 30px; padding: 0 13px; font-size: 17px; }
.site-header.is-condensed .brand__tag { display: none; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: 72px;
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 44px 34px;
  padding: 56px 0 44px;
}

.footer-brand { min-width: 0; }

.brand--footer .brand__mark { height: 34px; padding: 0 14px; font-size: 17px; }
.brand--footer .brand__name { font-size: 18px; }

.footer-brand__desc {
  margin-top: 18px;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.footer-brand__seal {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--amber);
}

.footer-col__title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.footer-list { display: flex; flex-direction: column; gap: 2px; }

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 5px 0;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  transition: color var(--t-fast), gap var(--t-fast);
}

.footer-link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width var(--t-fast), margin-right var(--t-fast);
}

.footer-link:hover { color: var(--cyan); }
.footer-link:hover::before { width: 12px; margin-right: 8px; }

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

.footer-meta__row {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 10px;
  font-size: 13px;
  line-height: 1.6;
}

.footer-meta__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
}

.footer-meta__val { color: var(--ink); word-break: break-word; }

.footer-base {
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
}

.footer-icp { color: var(--ink-2); }
.footer-base__note { color: var(--amber); }

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

.container--narrow { max-width: 860px; }

.grid { display: grid; gap: 26px; }

.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.grid--tight { gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid--tight > * { background: var(--panel); }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  padding: 20px 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
  transition: color var(--t-fast);
}

.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--line); }
.breadcrumb [aria-current="page"] { color: var(--cyan); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 22px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04121A;
  font-weight: 600;
}

.btn--primary:hover { background: var(--cyan-2); border-color: var(--cyan-2); }

.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--sm { padding: 8px 15px; font-size: 13px; }

/* ---------- 10. 面板 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
}

.panel + .panel { margin-top: -1px; }

.panel__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
}

.panel__idx {
  flex: none;
  padding-top: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-2);
  transition: color var(--t-fast);
}

.panel:hover .panel__idx { color: var(--cyan); }

.panel__title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.12;
}

.panel__note {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-2);
}

.panel__body { padding: 24px; }

/* ---------- 11. 索引行 ---------- */
.index-list { display: block; }

.index-row { border-top: 1px solid var(--line); }
.index-row:first-child { border-top: 0; }

.index-row__head {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  min-height: 48px;
  padding: 10px 24px;
  background: none;
  border: 0;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast);
}

.index-row__head:hover { background: var(--cyan-a08); }

.index-row__key {
  flex: none;
  min-width: 88px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

.index-row__meta {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.index-row__val {
  flex: none;
  font-size: 14px;
  color: var(--amber);
  text-align: right;
}

.index-row__toggle {
  flex: none;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  transition: transform var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.index-row__head:hover .index-row__toggle { border-color: var(--cyan); color: var(--cyan); }
.index-row.is-open .index-row__toggle { transform: rotate(45deg); border-color: var(--cyan); color: var(--cyan); }

.index-row__body {
  display: none;
  padding: 4px 24px 22px 128px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.75;
}

.index-row.is-open .index-row__body { display: block; }

/* ---------- 12. 筛选条 ---------- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}

.tag-filter__btn {
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.tag-filter__btn:hover { color: var(--ink); border-color: var(--cyan-2); }

.tag-filter__btn.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04121A;
  font-weight: 600;
}

.tag-filter__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  white-space: nowrap;
}

/* ---------- 13. 数据件 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border-left: 2px solid var(--line);
}

.stat__num {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
}

.stat--orange .stat__num { color: var(--orange); }
.stat--amber .stat__num { color: var(--amber); }

.stat__label {
  font-size: 13px;
  color: var(--ink-2);
}

.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--panel);
  font-size: 14px;
  color: var(--ink);
}

.legend-item__dot {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.legend-item__dot--orange { background: var(--orange); }
.legend-item__dot--amber { background: var(--amber); }
.legend-item__dot--muted { background: var(--line); }

.timeline { position: relative; }

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: var(--line);
}

.timeline__item {
  display: grid;
  grid-template-columns: 13px 1fr;
  gap: 16px;
  padding: 10px 0;
}

.timeline__dot {
  width: 11px;
  height: 11px;
  margin: 6px 0 0 1px;
  background: var(--panel);
  border: 1px solid var(--orange);
}

.timeline__item.is-current .timeline__dot {
  background: var(--cyan);
  border-color: var(--cyan);
}

.timeline__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

/* ---------- 14. 左侧索引轨道 ---------- */
.rail-index {
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: sticky;
  top: 130px;
}

.rail-index__link {
  display: block;
  padding: 6px 0 6px 10px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.rail-index__link:hover { color: var(--ink); border-left-color: var(--cyan-2); }

.rail-index__link.is-active,
.rail-index__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

/* ---------- 15. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--panel-2);
  background-image:
    linear-gradient(to right, rgba(34, 51, 92, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 51, 92, 0.5) 1px, transparent 1px);
  background-size: 32px 32px;
  border: 1px solid var(--line);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 24, 0) 42%, rgba(6, 11, 24, 0.78) 100%);
  pointer-events: none;
}

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

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--panorama { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__cap {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 13px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

/* ---------- 16. 显现 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}

html.js-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1099px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 38px 30px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--7-5,
  .grid--8-4 { grid-template-columns: 1fr; }
}

@media (max-width: 959px) {
  .nav-toggle { display: inline-flex; }
  .hdr-status { display: none; }
  .hdr-quick { display: none; }

  .hdr-nav {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
  }

  .hdr-nav[data-open="true"] { grid-template-rows: 1fr; }

  .hdr-nav__list {
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
  }

  .hdr-nav__item + .hdr-nav__item {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .hdr-nav__link {
    padding: 14px var(--pad);
    border-top: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .hdr-nav__link:hover,
  .hdr-nav__link[aria-current="page"] {
    border-top-color: transparent;
    border-left-color: var(--cyan);
  }

  .rail-index { display: none; }
  .index-row__body { padding-left: 24px; }
}

@media (max-width: 720px) {
  body { font-size: 15px; }

  .brand__name { font-size: 17px; }
  .brand__tag { display: none; }
  .brand__mark { height: 32px; padding: 0 13px; font-size: 17px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding: 40px 0 32px; }
  .footer-base__inner { flex-direction: column; align-items: flex-start; }

  .grid--4, .grid--3 { grid-template-columns: 1fr; }
  .grid { gap: 18px; }
  .panel__head { padding: 18px 18px; }
  .panel__body { padding: 18px; }
  .index-row__head { padding: 10px 18px; gap: 12px; }
  .index-row__key { min-width: 68px; font-size: 11px; }
  .index-row__body { padding: 4px 18px 18px; }
  .tag-filter { padding: 12px 18px; }
  .tag-filter__count { margin-left: 0; width: 100%; }
}

/* ---------- 18. 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;
    scroll-behavior: auto !important;
  }

  html.js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }
}