/* =========================================================
   皇官方版口中心 · 共享外壳样式 /assets/site.css
   宫廷档案库 × 维护状态面板
   ========================================================= */

:root {
  --ink: #181414;
  --ink-soft: #3a3330;
  --paper: #F4EBDD;
  --paper-lit: #FBF7EF;
  --cinnabar: #6E1B1B;
  --cinnabar-deep: #431010;
  --gold: #B8892F;
  --gold-pale: #E4CFA0;
  --celadon: #4F7D6E;
  --ash: #D9CDBB;
  --warm: #7A6F63;

  --font-display: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-nav-break: 960px;
}

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

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

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, rgba(24, 20, 20, .022) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(24, 20, 20, .018) 0 1px, transparent 1px 4px),
    radial-gradient(120% 88% at 6% 0%, #FBF7EF 0%, rgba(251, 247, 239, 0) 62%);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { display: block; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: .02em;
  color: var(--ink);
}

p { margin: 0 0 1em; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }

img { display: block; max-width: 100%; height: auto; }

a {
  color: var(--cinnabar);
  text-decoration-color: rgba(110, 27, 27, .38);
  text-underline-offset: 3px;
}

button { font: inherit; color: inherit; }

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

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

/* ---------- 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding-block: clamp(44px, 6vw, 88px); }

.section__head {
  position: relative;
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 36px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ash);
}

.section__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(56px, 9vw, 88px);
  height: 2px;
  background: var(--gold);
}

.section__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--gold);
}

.section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.lede {
  max-width: 62ch;
  margin: 0 0 1em;
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.9;
  color: var(--ink-soft);
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
}

.is-hidden { display: none !important; }

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--ash);
}

.rule--gold {
  background: linear-gradient(90deg, var(--gold), rgba(184, 137, 47, 0));
}

/* ---------- 按钮 ---------- */
.btn {
  --btn-bg: var(--cinnabar);
  --btn-fg: var(--paper-lit);
  --btn-bd: var(--cinnabar-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid var(--btn-bd);
  border-radius: 2px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition:
    background .18s var(--ease),
    color .18s var(--ease),
    border-color .18s var(--ease),
    transform .18s var(--ease),
    box-shadow .18s var(--ease);
}

.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px -12px rgba(67, 16, 16, .8); }
.btn:active { transform: translateY(0); }

.btn--seal {
  --btn-bg: var(--cinnabar);
  --btn-fg: var(--paper-lit);
  --btn-bd: var(--cinnabar-deep);
  box-shadow: inset 0 0 0 1px rgba(228, 207, 160, .32);
}
.btn--seal:hover { --btn-bg: var(--cinnabar-deep); --btn-fg: var(--gold-pale); }

.btn--solid {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper-lit);
  --btn-bd: var(--ink);
}
.btn--solid:hover { --btn-bg: var(--cinnabar); --btn-bd: var(--cinnabar); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--cinnabar);
  --btn-bd: var(--gold);
}
.btn--ghost:hover { --btn-bg: var(--gold-pale); --btn-fg: var(--cinnabar-deep); }

/* ---------- 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--ash);
  border-radius: 999px;
  background: var(--paper-lit);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  line-height: 1.6;
  text-decoration: none;
}

.chip--gold {
  border-color: var(--gold);
  background: var(--gold-pale);
  color: var(--cinnabar-deep);
}

.chip--celadon {
  border-color: var(--celadon);
  background: rgba(79, 125, 110, .1);
  color: var(--celadon);
}

.seal {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  padding: 5px 9px;
  border-radius: 2px;
  background: var(--cinnabar);
  color: var(--gold-pale);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.5;
  box-shadow: inset 0 0 0 1px rgba(228, 207, 160, .45);
}

.data-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.data-tag__dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 125, 110, .16);
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--paper-lit);
  border: 1px solid var(--ash);
  border-radius: 4px;
  padding: clamp(18px, 2.4vw, 30px);
}

.card--flush { padding: 0; overflow: hidden; }

/* ---------- 面包屑 ---------- */
.breadcrumbs { padding: 20px 0 0; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--warm);
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--gold);
}

.breadcrumbs__link {
  color: var(--warm);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.breadcrumbs__link:hover { color: var(--cinnabar); }

/* ---------- 图片容器（供页面阶段使用） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--ash);
  border-radius: 4px;
  background:
    repeating-linear-gradient(135deg, rgba(24, 20, 20, .055) 0 1px, transparent 1px 9px),
    linear-gradient(160deg, var(--paper) 0%, var(--ash) 100%);
}

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

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

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  background: rgba(24, 20, 20, .74);
  color: var(--paper-lit);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
}

/* ---------- 阅读进度（由 JS 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 400;
  pointer-events: none;
  background: transparent;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  transition: transform .12s linear;
}

/* =========================================================
   跳过链接
   ========================================================= */
.skip-link {
  position: absolute;
  left: 16px;
  top: -72px;
  z-index: 500;
  padding: 10px 18px;
  border-radius: 2px;
  background: var(--cinnabar);
  color: var(--paper-lit);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  text-decoration: none;
  transition: top .18s var(--ease);
}

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

/* =========================================================
   头部
   ========================================================= */
.site-header {
  position: relative;
  z-index: 90;
}

/* 状态索引带 */
.status-rail {
  background: var(--cinnabar);
  color: var(--gold-pale);
  border-bottom: 1px solid rgba(184, 137, 47, .45);
}

.status-rail__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: var(--shell);
  min-height: 34px;
  margin: 0 auto;
  padding: 0 var(--gutter);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.4;
}

.status-rail__tag {
  margin: 0;
  color: var(--paper-lit);
  font-weight: 500;
  white-space: nowrap;
}

.status-rail__divider {
  display: inline-block;
  width: 1px;
  height: 12px;
  flex: none;
  background: rgba(228, 207, 160, .42);
}

.status-rail__meta {
  margin: 0;
  color: rgba(228, 207, 160, .82);
  white-space: nowrap;
}

.status-rail__state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 0 auto;
  color: var(--gold-pale);
  white-space: nowrap;
}

.status-rail__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 125, 110, .3);
  animation: rail-breathe 3.4s ease-in-out infinite;
}

@keyframes rail-breathe {
  0%, 100% { opacity: .45; }
  50% { opacity: 1; }
}

/* 命令栏 */
.command-bar {
  position: relative;
  background: var(--paper-lit);
  border-bottom: 1px solid var(--ash);
}

.command-bar::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(48px, 12vw, 168px);
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(184, 137, 47, 0));
}

.command-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
  width: 100%;
  max-width: var(--shell);
  min-height: 78px;
  margin: 0 auto;
  padding: 13px var(--gutter);
}

/* 品牌锁 */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  color: var(--ink);
  text-decoration: none;
}

.brand-lockup__seal {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 3px;
  background: var(--cinnabar);
  color: var(--gold-pale);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  box-shadow:
    inset 0 0 0 1px rgba(228, 207, 160, .55),
    0 2px 0 rgba(67, 16, 16, .32);
  transition: background .18s var(--ease), color .18s var(--ease);
}

.brand-lockup:hover .brand-lockup__seal {
  background: var(--cinnabar-deep);
  color: var(--gold-pale);
}

.brand-lockup__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-lockup__name {
  font-family: var(--font-display);
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 800;
  letter-spacing: .07em;
  color: var(--ink);
}

.brand-lockup__note {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--warm);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--cinnabar);
  border-radius: 2px;
  background: transparent;
  color: var(--cinnabar);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  line-height: 1;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.nav-toggle:hover { background: var(--cinnabar); color: var(--paper-lit); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), top .2s var(--ease);
}

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

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

.nav-toggle__label { display: inline-block; }

/* 命令栏导航 */
.command-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.command-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 24px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.command-nav__item { display: flex; align-items: center; }

.command-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 6px 2px 9px;
  color: var(--ink-soft);
  font-size: 13.5px;
  letter-spacing: .02em;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.command-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--gold);
  transform: translateY(-.3em);
  transition: color .18s var(--ease);
}

.command-nav__label { white-space: nowrap; }

.command-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease), background .2s var(--ease);
}

.command-nav__link:hover { color: var(--cinnabar); }
.command-nav__link:hover::after { transform: scaleX(1); }

.command-nav__link[aria-current="page"] {
  color: var(--cinnabar);
  font-weight: 700;
}

.command-nav__link[aria-current="page"] .command-nav__index { color: var(--gold); }

.command-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--ink);
}

.command-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -3px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(79, 125, 110, .18);
  transform: translateX(-50%);
}

.command-nav__item--cta { border: 0; }

.command-nav__cta {
  padding: 9px 18px;
  font-size: 13px;
  letter-spacing: .06em;
  white-space: nowrap;
}

/* =========================================================
   页脚 · 档案封底
   ========================================================= */
.site-footer {
  margin-top: clamp(56px, 8vw, 110px);
  background: var(--cinnabar-deep);
  color: var(--gold-pale);
  border-top: 1px solid var(--gold);
  position: relative;
}

.footer-main { position: relative; }

.footer-main__inner {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1.15fr;
  gap: clamp(24px, 4vw, 56px);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 5.5vw, 72px) var(--gutter) clamp(30px, 4vw, 48px);
}

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

.footer-brand__mark {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: 3px;
  background: var(--cinnabar);
  color: var(--gold-pale);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 0 0 1px rgba(228, 207, 160, .5);
}

.footer-brand__name {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 27px);
  font-weight: 700;
  letter-spacing: .09em;
  line-height: 1.3;
  color: var(--paper-lit);
}

.footer-brand__line {
  max-width: 26ch;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 2;
  color: rgba(228, 207, 160, .6);
}

.footer-ledger,
.footer-contact { min-width: 0; }

.footer-ledger__title,
.footer-contact__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(184, 137, 47, .4);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--gold);
}

.footer-ledger__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-ledger__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.7;
}

.footer-ledger__key { color: rgba(228, 207, 160, .58); }

.footer-ledger__val { color: var(--paper-lit); text-align: right; }

.footer-contact__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-contact__row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(228, 207, 160, .55);
}

.footer-contact__val {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  line-height: 1.8;
  color: var(--paper-lit);
  overflow-wrap: anywhere;
}

/* 条款带 */
.footer-legal {
  border-top: 1px solid rgba(184, 137, 47, .35);
  background: rgba(24, 20, 20, .22);
}

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter);
}

.footer-legal__copy,
.footer-legal__icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  line-height: 1.8;
  color: rgba(228, 207, 160, .7);
}

.footer-legal__icp { color: rgba(228, 207, 160, .52); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
}

.footer-links__item { display: inline-flex; }

.footer-links__link {
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(184, 137, 47, .45);
  color: var(--gold-pale);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer-links__link:hover {
  color: var(--paper-lit);
  border-bottom-color: var(--gold-pale);
}

.site-footer :focus-visible { outline-color: var(--gold-pale); }
.status-rail :focus-visible { outline-color: var(--gold-pale); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .command-nav__list { gap: 14px; }
  .command-nav__link { font-size: 12.8px; }
  .command-nav__index { font-size: 9.5px; }
  .command-nav__cta { padding: 8px 14px; font-size: 12.5px; }
  .command-bar__inner { gap: 18px; }
}

@media (max-width: 960px) {
  .command-bar__inner {
    min-height: 68px;
    padding: 12px var(--gutter);
  }

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

  .command-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    margin: 0;
    padding: 0 var(--gutter);
    background: var(--paper-lit);
    border-top: 1px solid var(--ash);
    border-bottom: 1px solid var(--gold);
    box-shadow: 0 28px 48px -32px rgba(24, 20, 20, .65);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height .28s var(--ease),
      opacity .2s var(--ease),
      visibility .28s var(--ease);
  }

  .site-header[data-open="true"] .command-nav {
    max-height: min(78vh, 640px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .command-nav__list {
    display: block;
    gap: 0;
    padding: 8px 0 0;
  }

  .command-nav__item {
    display: block;
    border-bottom: 1px solid var(--ash);
  }

  .command-nav__item--cta {
    border-bottom: 0;
    padding: 16px 0 22px;
  }

  .command-nav__link {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 0;
    font-size: 15.5px;
  }

  .command-nav__index { font-size: 10.5px; }

  .command-nav__link::after { display: none; }

  .command-nav__link[aria-current="page"] {
    color: var(--cinnabar);
    font-weight: 700;
  }

  .command-nav__link[aria-current="page"]::before {
    position: static;
    order: -1;
    width: 6px;
    height: 6px;
    flex: none;
    transform: none;
    box-shadow: 0 0 0 3px rgba(79, 125, 110, .18);
  }

  .command-nav__cta {
    width: 100%;
    padding: 13px 20px;
    font-size: 14px;
  }

  .footer-main__inner {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  .footer-brand { grid-column: 1 / -1; }

  .footer-links { margin-left: 0; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .status-rail__inner {
    gap: 10px;
    min-height: 30px;
    font-size: 10px;
    letter-spacing: .08em;
  }

  .status-rail__meta,
  .status-rail__divider { display: none; }

  .brand-lockup__seal { width: 34px; height: 34px; font-size: 18px; }
  .brand-lockup__note { letter-spacing: .14em; }

  .footer-main__inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-legal__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .footer-links { gap: 10px 18px; }
}

/* =========================================================
   降低动效偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .status-rail__dot { animation: none; opacity: 1; }

  .btn:hover { transform: none; }

  .scroll-progress__bar { transition: none; }
}