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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 116px;
}

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

ul, ol { list-style: none; }

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

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

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

/* ========== 2. 变量 ========== */
:root {
  --ink: #16233A;
  --ink-deep: #0D1726;
  --gold: #C2913F;
  --gold-soft: #E9D3A4;
  --vermilion: #B8432C;
  --slate: #5A6C79;
  --paper: #F3EEE4;
  --paper-deep: #E4DCCB;
  --rule: #C7BEAA;
  --highlight: #FBF8F1;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --maxw: 1240px;
  --pad-x: clamp(18px, 4.4vw, 56px);
  --cut: 18px;
  --ease: cubic-bezier(.22, .68, .28, 1);
  --strip-h: 34px;
  --bar-h: 62px;
}

/* ========== 3. 基础排版 ========== */
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.bj-h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.bj-h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.bj-h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.42;
}

.bj-lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  max-width: 62ch;
}

.bj-text { font-size: 16px; line-height: 1.75; }
.bj-text + .bj-text { margin-top: 1em; }

.bj-caption {
  font-size: 13px;
  line-height: 1.7;
  font-weight: 300;
  color: var(--slate);
}

.bj-mono {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.bj-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--gold);
}

.bj-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.bj-vnote {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.35em;
  color: var(--slate);
  line-height: 1;
}

.bj-link {
  position: relative;
  display: inline-block;
  padding-bottom: 1px;
}

.bj-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: var(--gold);
  transition: width .18s var(--ease);
}

.bj-link:hover::after { width: 100%; }

/* ========== 4. 焦点与可访问 ========== */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -60px;
  z-index: 200;
  padding: 0.65em 1.1em;
  background: var(--ink-deep);
  color: var(--highlight);
  font-size: 14px;
  letter-spacing: 0.06em;
  transition: top .18s var(--ease);
}

.skip-link:focus { top: 10px; }

/* ========== 5. 布局工具 ========== */
.bj-container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.bj-section { padding-block: clamp(52px, 7.5vw, 104px); }
.bj-section--tight { padding-block: clamp(30px, 4.5vw, 58px); }

.bj-section--ink {
  background: var(--ink);
  color: var(--paper);
}

.bj-section--ink .bj-text,
.bj-section--ink .bj-lead { color: rgba(251, 248, 241, 0.86); }

.bj-section--ink .bj-caption { color: rgba(251, 248, 241, 0.6); }

.bj-section--paper-deep { background: var(--paper-deep); }

.bj-slant-top {
  clip-path: polygon(0 2.6vw, 100% 0, 100% 100%, 0 100%);
  padding-top: calc(2.6vw + clamp(52px, 7.5vw, 104px));
}

.bj-slant-bottom {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.6vw), 0 100%);
  padding-bottom: calc(2.6vw + clamp(52px, 7.5vw, 104px));
}

.bj-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 38px);
}

.bj-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bj-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bj-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bj-grid--split { grid-template-columns: 7fr 4fr; }
.bj-grid--split-rev { grid-template-columns: 4fr 7fr; }

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

@media (max-width: 760px) {
  .bj-grid--3,
  .bj-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  .bj-grid--2,
  .bj-grid--3,
  .bj-grid--4 { grid-template-columns: 1fr; }
}

/* ========== 6. 通用组件 ========== */
.bj-card {
  --cut: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--highlight);
  color: var(--ink);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.bj-card:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
}

.bj-card__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.bj-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.45;
}

.bj-card__body {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--slate);
}

.bj-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.bj-panel {
  --cut: 22px;
  padding: clamp(22px, 3vw, 40px);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.bj-panel--ink { background: var(--ink); color: var(--paper); }
.bj-panel--ink .bj-text { color: rgba(251, 248, 241, 0.86); }

.bj-panel--paper {
  background: var(--paper-deep);
  color: var(--ink);
  border: 1px solid var(--rule);
}

.bj-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.2em 0.7em;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
  white-space: nowrap;
}

.bj-tag--gold {
  background: var(--gold-soft);
  border-color: var(--gold);
  color: var(--ink);
}

.bj-tag--new {
  background: var(--vermilion);
  border-color: var(--vermilion);
  color: var(--highlight);
}

.bj-btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 0.8em 1.5em;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-size: 14.5px;
  letter-spacing: 0.04em;
  overflow: hidden;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.bj-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform .24s var(--ease);
}

.bj-btn:hover { color: var(--highlight); }
.bj-btn:hover::before { transform: translateY(0); }

.bj-btn--primary {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink-deep);
}

.bj-btn--primary::before { background: var(--ink); }
.bj-btn--primary:hover { color: var(--gold-soft); }

.bj-btn--ghost {
  border-color: var(--rule);
  color: var(--slate);
}

.bj-btn--ghost::before { background: var(--ink); }
.bj-btn--ghost:hover { color: var(--highlight); border-color: var(--ink); }

.bj-crumbs { padding-block: 14px; }

.bj-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

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

.bj-crumbs__item + .bj-crumbs__item::before {
  content: "／";
  color: var(--rule);
}

.bj-crumbs__link { color: var(--slate); transition: color .18s var(--ease); }
.bj-crumbs__link:hover { color: var(--gold); }
.bj-crumbs__item[aria-current="page"] { color: var(--ink); }

.bj-index-wall {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 0.9fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.bj-index-col {
  background: var(--paper);
  padding: clamp(16px, 2vw, 26px);
}

.bj-index-col--wide { background: var(--highlight); }

@media (max-width: 900px) {
  .bj-index-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .bj-index-wall { grid-template-columns: 1fr; }
}

.bj-fold { border-top: 1px solid var(--rule); }

.bj-fold__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 0;
  text-align: left;
  color: inherit;
  transition: color .18s var(--ease);
}

.bj-fold__head:hover { color: var(--gold); }

.bj-fold__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.4;
}

.bj-fold__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.bj-fold__sign {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-left: 6px;
}

.bj-fold__sign::before,
.bj-fold__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.bj-fold__sign::before { left: 0; top: 5.5px; width: 12px; height: 1px; }
.bj-fold__sign::after { top: 0; left: 5.5px; width: 1px; height: 12px; transition: transform .2s var(--ease); }
.bj-fold[data-open] .bj-fold__sign::after { transform: scaleY(0); }

.bj-fold__body { display: none; padding-bottom: 22px; }
.bj-fold[data-open] .bj-fold__body { display: block; }

.bj-ledger { border-top: 1px solid var(--rule); }

.bj-ledger__row {
  display: grid;
  grid-template-columns: minmax(92px, 0.9fr) 2fr 1fr 1fr;
  gap: 14px;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
}

.bj-ledger__head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

@media (max-width: 680px) {
  .bj-ledger__row { grid-template-columns: 1fr 1fr; font-size: 13px; }
}

/* 图片容器基础规则（页面阶段放入真实图片） */
.bj-media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.bj-media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bj-media--wide { aspect-ratio: 16 / 9; }
.bj-media--tall { aspect-ratio: 3 / 4; }
.bj-media--window { aspect-ratio: 16 / 10; border-top: 2px solid var(--gold); }

.bj-media--placeholder {
  background-image: repeating-linear-gradient(135deg, var(--paper-deep) 0 12px, var(--paper) 12px 24px);
}

.bj-media__caption { margin-top: 8px; }

/* ========== 7. 头部 ========== */
.bj-header {
  position: sticky;
  top: 0;
  z-index: 80;
  --hd-fg: var(--ink);
  --hd-dim: var(--slate);
  --hd-rule: var(--rule);
  --hd-accent: #96692A;
  color: var(--hd-fg);
  background: rgba(243, 238, 228, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 0 rgba(199, 190, 170, 0.5);
  transition: background-color .22s var(--ease), color .22s var(--ease), box-shadow .22s var(--ease);
}

.bj-header[data-scrolled] {
  --hd-fg: var(--highlight);
  --hd-dim: rgba(251, 248, 241, 0.66);
  --hd-rule: rgba(194, 145, 63, 0.5);
  --hd-accent: var(--gold-soft);
  background: var(--ink);
  box-shadow: 0 1px 0 0 rgba(194, 145, 63, 0.55);
}

.bj-header__strip {
  max-height: var(--strip-h);
  overflow: hidden;
  transition: max-height .24s var(--ease), opacity .18s var(--ease);
}

.bj-header[data-scrolled] .bj-header__strip {
  max-height: 0;
  opacity: 0;
}

.bj-header__strip-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  height: var(--strip-h);
  border-bottom: 1px solid var(--hd-rule);
  font-size: 12px;
  color: var(--hd-dim);
}

.bj-header__strip-note {
  margin-right: auto;
  letter-spacing: 0.04em;
}

.bj-utility__link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--hd-fg);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.bj-utility__link:hover {
  color: var(--hd-accent);
  border-bottom-color: var(--hd-accent);
}

.bj-utility__hours {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--hd-dim);
  white-space: nowrap;
}

.bj-header__bar { position: relative; }

.bj-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
  min-height: var(--bar-h);
  transition: min-height .22s var(--ease);
}

.bj-header[data-scrolled] .bj-header__inner { min-height: 52px; }

.bj-brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex: 0 0 auto;
}

.bj-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.2vw, 25px);
  letter-spacing: 0.06em;
  color: var(--hd-fg);
  white-space: nowrap;
}

.bj-brand__tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--hd-accent);
  white-space: nowrap;
}

.bj-nav { flex: 1 1 auto; min-width: 0; }

.bj-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(10px, 1.5vw, 26px);
}

.bj-nav__item { flex: 0 0 auto; }

.bj-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--hd-fg);
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.bj-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--hd-rule);
  transition: width .18s var(--ease), background-color .18s var(--ease);
}

.bj-nav__link:hover { color: var(--hd-accent); }
.bj-nav__link:hover::after { width: 100%; background: var(--hd-accent); }

.bj-nav__link[aria-current="page"] { font-weight: 700; }
.bj-nav__link[aria-current="page"]::after { width: 100%; background: var(--hd-accent); }

.bj-nav__utility { display: none; }

.bj-header__aside {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
}

.bj-search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--hd-rule);
  color: var(--hd-fg);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.bj-search-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}

.bj-search-btn:hover {
  border-color: var(--hd-accent);
  color: var(--hd-accent);
}

.bj-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--hd-rule);
  color: var(--hd-fg);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.bj-nav-toggle:hover {
  border-color: var(--hd-accent);
  color: var(--hd-accent);
}

.bj-nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 16px;
}

.bj-nav-toggle__bar {
  display: block;
  height: 1px;
  width: 16px;
  background: currentColor;
  transition: transform .2s var(--ease);
}

.bj-nav-toggle__bar:nth-child(2) { width: 11px; }

.bj-nav-toggle[aria-expanded="true"] .bj-nav-toggle__bar:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.bj-nav-toggle[aria-expanded="true"] .bj-nav-toggle__bar:nth-child(2) {
  width: 16px;
  transform: translateY(-3px) rotate(-45deg);
}

.bj-nav-toggle__text { line-height: 1; }

.bj-progress {
  height: 2px;
  overflow: hidden;
  background: transparent;
}

.bj-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--gold);
}

@media (max-width: 1100px) {
  .bj-nav__list { gap: 12px; }
  .bj-nav__link { font-size: 14px; }
}

@media (max-width: 1000px) {
  .bj-brand__tagline { display: none; }
}

@media (max-width: 960px) {
  .bj-header__strip { display: none; }
  .bj-nav-toggle { display: inline-flex; }

  .bj-header__inner {
    gap: 12px;
    min-height: 56px;
  }

  .bj-header[data-scrolled] .bj-header__inner { min-height: 52px; }

  .bj-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    flex: none;
    max-height: 0;
    padding: 0 var(--pad-x);
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    background: var(--ink);
    color: var(--paper);
    box-shadow: 0 22px 38px -26px rgba(13, 23, 38, 0.75);
    transition: max-height .3s var(--ease), opacity .2s var(--ease), padding .3s var(--ease), visibility .2s linear;
  }

  .bj-nav[data-open] {
    max-height: min(80vh, 660px);
    padding: 12px var(--pad-x) 24px;
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
  }

  .bj-nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }

  .bj-nav__item { border-bottom: 1px solid rgba(199, 190, 170, 0.2); }

  .bj-nav__link {
    display: block;
    padding: 14px 0;
    font-size: 17px;
    color: var(--paper);
  }

  .bj-nav__link::after { background: var(--gold); }
  .bj-nav__link:hover { color: var(--gold-soft); }
  .bj-nav__link[aria-current="page"] { color: var(--gold-soft); }
  .bj-nav__link[aria-current="page"]::after { background: var(--gold); }

  .bj-nav__utility {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(194, 145, 63, 0.4);
  }

  .bj-nav__utility .bj-utility__link {
    align-self: flex-start;
    font-size: 13px;
    color: var(--gold-soft);
  }

  .bj-nav__utility .bj-utility__hours { color: rgba(251, 248, 241, 0.6); }
}

/* ========== 8. 页脚 ========== */
.bj-footer {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(44px, 6vw, 84px) 0 26px;
}

.bj-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(194, 145, 63, 0) 68%);
}

.bj-footer__top {
  display: grid;
  grid-template-columns: minmax(210px, 1fr) 2.4fr;
  gap: clamp(26px, 4vw, 64px);
  padding-bottom: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid rgba(199, 190, 170, 0.24);
}

.bj-footer__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 27px);
  letter-spacing: 0.06em;
}

.bj-footer__tagline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-soft);
}

.bj-footer__note {
  margin-top: 16px;
  max-width: 30ch;
  font-size: 13px;
  line-height: 1.85;
  color: rgba(251, 248, 241, 0.62);
}

.bj-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 42px);
}

.bj-footer__col-title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(194, 145, 63, 0.4);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.bj-footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.bj-footer__link {
  position: relative;
  display: inline-block;
  padding-bottom: 1px;
  font-size: 14px;
  color: rgba(251, 248, 241, 0.82);
  transition: color .18s var(--ease);
}

.bj-footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: var(--gold);
  transition: width .18s var(--ease);
}

.bj-footer__link:hover { color: var(--gold-soft); }
.bj-footer__link:hover::after { width: 100%; }

.bj-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(199, 190, 170, 0.18);
  font-size: 12.5px;
  color: rgba(251, 248, 241, 0.66);
}

.bj-footer__meta-item { line-height: 1.7; }

.bj-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-top: 18px;
  font-size: 12px;
  color: rgba(251, 248, 241, 0.5);
}

.bj-footer__sla { max-width: 46ch; line-height: 1.7; }
.bj-footer__perf { margin-left: auto; color: rgba(233, 211, 164, 0.78); }
.bj-footer__legal { line-height: 1.7; }

@media (max-width: 860px) {
  .bj-footer__top { grid-template-columns: 1fr; }
  .bj-footer__perf { margin-left: 0; }
}

@media (max-width: 620px) {
  .bj-footer__cols { grid-template-columns: 1fr; gap: 24px; }
  .bj-footer__meta { flex-direction: column; gap: 6px; }
}

/* ========== 9. 降级动效 ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}