/* =========================================================
   xiaoniao-focus.com.cn — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --xo-orange: #FF6B2C;
  --xo-orange-deep: #E85A1B;
  --xo-sea: #157A9C;
  --xo-feather: #0E8C7F;
  --xo-sand: #F7F0E4;
  --xo-paper: #FFFBF3;
  --xo-ink: #082E26;
  --xo-lime: #C7FF3D;
  --xo-wine: #6A1F3A;
  --xo-indigo: #33246B;
  --xo-text: #10231F;
  --xo-mist: #D8E9EC;
  --xo-apricot: #FFD7C2;
  --xo-coral: #E24732;

  --xo-font-display: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --xo-font-body: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --xo-font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --xo-border: 3px solid var(--xo-ink);
  --xo-shadow: 6px 6px 0 0 var(--xo-ink);
  --xo-shadow-sm: 4px 4px 0 0 var(--xo-ink);
  --xo-pill: 999px;
  --xo-radius: 24px;
  --xo-wrap-width: 1280px;
  --xo-gutter: clamp(16px, 4vw, 40px);
  --xo-ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  font-family: var(--xo-font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--xo-text);
  background-color: var(--xo-sand);
  background-image:
    radial-gradient(circle at 8% 4%, rgba(255, 107, 44, .10), transparent 34%),
    radial-gradient(circle at 92% 96%, rgba(21, 122, 156, .10), transparent 40%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--xo-font-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--xo-text);
  text-wrap: balance;
}
h1 { font-size: clamp(36px, 6vw, 68px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(19px, 1.7vw, 25px); font-weight: 700; line-height: 1.32; letter-spacing: -.01em; }
h4 { font-size: clamp(16px, 1.3vw, 19px); font-weight: 800; line-height: 1.4; }
p { text-wrap: pretty; }
strong, b { font-weight: 800; }
small { font-size: 13px; }
::selection { background: var(--xo-lime); color: var(--xo-ink); }
:focus-visible { outline: 3px solid var(--xo-sea); outline-offset: 3px; border-radius: 4px; }
#main-content { scroll-margin-top: 112px; }
main:focus { outline: none; }

/* ---------- 4. 跳转链接 ---------- */
.xo-skip {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 120;
  padding: 12px 22px;
  transform: translate(-50%, -150%);
  background: var(--xo-ink);
  color: var(--xo-lime);
  border-radius: 0 0 16px 16px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .04em;
  text-decoration: none;
  transition: transform .16s var(--xo-ease);
}
.xo-skip:focus,
.xo-skip:focus-visible { transform: translate(-50%, 0); outline-offset: -6px; }

/* ---------- 5. 滚动进度刻度 ---------- */
.xo-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 5px;
  z-index: 95;
  background: rgba(16, 35, 31, .12);
  pointer-events: none;
}
.xo-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--xo-orange) 0%, var(--xo-sea) 62%, var(--xo-feather) 100%);
  transition: width .1s linear;
}

/* ---------- 6. 页头：悬浮胶囊浮岛 ---------- */
.xo-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 18px var(--xo-gutter) 0;
}
.xo-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  width: 100%;
  max-width: var(--xo-wrap-width);
  margin-inline: auto;
  padding: 10px 12px 10px 14px;
  background: var(--xo-sand);
  border: var(--xo-border);
  border-radius: var(--xo-pill);
  box-shadow: var(--xo-shadow);
}

/* 品牌锁定 */
.xo-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--xo-text);
}
.xo-brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: var(--xo-border);
  border-radius: 12px;
  background: var(--xo-orange);
  color: var(--xo-ink);
  font-family: var(--xo-font-display);
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
  transition: background-color .15s var(--xo-ease), transform .15s var(--xo-ease);
}
.xo-brand:hover .xo-brand__mark { background: var(--xo-lime); transform: rotate(-4deg); }
.xo-brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.xo-brand__name {
  font-family: var(--xo-font-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--xo-ink);
}
.xo-brand__tag {
  margin-top: 3px;
  font-family: var(--xo-font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--xo-sea);
  white-space: nowrap;
}

/* 主导航 */
.xo-nav { margin-left: auto; min-width: 0; }
.xo-nav__list { display: flex; align-items: center; gap: 2px; }
.xo-nav__item { display: block; }
.xo-nav__link {
  display: inline-block;
  padding: 8px 11px;
  border-radius: var(--xo-pill);
  color: var(--xo-text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .15s var(--xo-ease), background-color .15s var(--xo-ease);
}
.xo-nav__link:hover { background: var(--xo-apricot); color: var(--xo-ink); }
.xo-nav__link:focus-visible { outline: 3px solid var(--xo-sea); outline-offset: 2px; }
.xo-nav__link[aria-current="page"] {
  background: var(--xo-ink);
  color: var(--xo-sand);
  padding-inline: 14px;
}
.xo-nav__link[aria-current="page"]::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  vertical-align: middle;
  border-radius: 50%;
  background: var(--xo-lime);
}

/* 行动区 */
.xo-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}
.xo-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  background: var(--xo-orange);
  color: var(--xo-ink);
  border: var(--xo-border);
  border-radius: var(--xo-pill);
  font-size: 13.5px;
  font-weight: 900;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 3px 0 0 var(--xo-ink);
  transition: transform .14s var(--xo-ease), box-shadow .14s var(--xo-ease),
              background-color .14s var(--xo-ease), color .14s var(--xo-ease);
}
.xo-cta:hover {
  background: var(--xo-ink);
  color: var(--xo-lime);
  transform: translate(1px, 2px);
  box-shadow: 0 1px 0 0 var(--xo-ink);
}
.xo-cta:focus-visible { outline: 3px solid var(--xo-sea); outline-offset: 3px; }

/* 移动导航按钮 */
.xo-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 42px;
  padding: 0;
  background: var(--xo-mist);
  border: var(--xo-border);
  border-radius: 14px;
  cursor: pointer;
  transition: background-color .15s var(--xo-ease);
}
.xo-nav-toggle:hover { background: var(--xo-apricot); }
.xo-nav-toggle:focus-visible { outline: 3px solid var(--xo-sea); outline-offset: 3px; }
.xo-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 3px;
  margin: 2.5px 0;
  border-radius: 2px;
  background: var(--xo-ink);
  transition: transform .18s var(--xo-ease), opacity .18s var(--xo-ease);
}
.xo-header[data-open] .xo-nav-toggle { background: var(--xo-orange); }
.xo-header[data-open] .xo-nav-toggle__bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.xo-header[data-open] .xo-nav-toggle__bar:nth-child(2) { opacity: 0; transform: scaleX(.4); }
.xo-header[data-open] .xo-nav-toggle__bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 7. 页脚：数据舱底 ---------- */
.xo-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(40px, 7vw, 96px);
  background: var(--xo-ink);
  color: var(--xo-sand);
  border-top: 6px solid var(--xo-orange);
}
.xo-footer::before {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -160px;
  width: 340px;
  height: 340px;
  border: 3px solid rgba(199, 255, 61, .16);
  border-radius: 50%;
  pointer-events: none;
}
.xo-footer a { color: inherit; }

.xo-footer__ticker { border-bottom: 2px solid rgba(247, 240, 228, .16); padding-block: 12px; }
.xo-footer__ticker-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
}
.xo-footer__tagline {
  font-family: var(--xo-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--xo-orange);
}
.xo-footer__ticker-list { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.xo-footer__ticker-item {
  position: relative;
  padding-left: 16px;
  font-family: var(--xo-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--xo-lime);
}
.xo-footer__ticker-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  background: rgba(199, 255, 61, .6);
  transform: translateY(-50%) rotate(45deg);
}

.xo-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 2fr) minmax(0, 2fr) minmax(0, 4fr);
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(32px, 5vw, 56px);
}
.xo-footer__brand { max-width: 40ch; }
.xo-footer__name {
  font-family: var(--xo-font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--xo-sand);
}
.xo-footer__name::after {
  content: "";
  display: block;
  width: 52px;
  height: 6px;
  margin-top: 12px;
  background: var(--xo-orange);
}
.xo-footer__statement {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(247, 240, 228, .78);
}
.xo-footer__brand-tag {
  margin-top: 14px;
  font-family: var(--xo-font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--xo-lime);
}

.xo-footer__col { min-width: 0; }
.xo-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--xo-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--xo-lime);
}
.xo-footer__links { display: grid; gap: 9px; }
.xo-footer__link {
  display: inline-block;
  padding-block: 2px;
  font-size: 14.5px;
  text-decoration: none;
  color: rgba(247, 240, 228, .86);
  border-bottom: 2px solid transparent;
  transition: color .15s var(--xo-ease), border-color .15s var(--xo-ease);
}
.xo-footer__link:hover { color: var(--xo-lime); border-bottom-color: var(--xo-lime); }
.xo-footer__link:focus-visible { outline: 3px solid var(--xo-lime); outline-offset: 3px; border-radius: 2px; }

.xo-footer__contact { min-width: 0; }
.xo-footer__contact-list { display: grid; gap: 2px; }
.xo-footer__contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  padding: 9px 0;
  border-bottom: 2px dashed rgba(247, 240, 228, .18);
}
.xo-footer__label {
  flex: 0 0 100%;
  font-family: var(--xo-font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(247, 240, 228, .55);
}
.xo-footer__value {
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.6;
  color: var(--xo-sand);
  overflow-wrap: anywhere;
}
.xo-copy {
  flex: 0 0 auto;
  padding: 5px 11px;
  font-family: var(--xo-font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--xo-sand);
  background: transparent;
  border: 2px solid rgba(247, 240, 228, .4);
  border-radius: var(--xo-pill);
  cursor: pointer;
  transition: background-color .15s var(--xo-ease), color .15s var(--xo-ease),
              border-color .15s var(--xo-ease);
}
.xo-copy:hover { background: var(--xo-lime); border-color: var(--xo-lime); color: var(--xo-ink); }
.xo-copy:focus-visible { outline: 3px solid var(--xo-lime); outline-offset: 3px; }
.xo-copy[data-copied] { background: var(--xo-lime); border-color: var(--xo-lime); color: var(--xo-ink); }

.xo-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding-block: 18px;
  border-top: 2px solid rgba(247, 240, 228, .16);
  font-family: var(--xo-font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: rgba(247, 240, 228, .62);
}
.xo-footer__copyright { margin: 0; }
.xo-footer__icp { margin: 0; font-variant-numeric: tabular-nums; }
.xo-footer__legal-links { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-left: auto; }
.xo-footer__legal-link {
  text-decoration: none;
  color: rgba(247, 240, 228, .82);
  border-bottom: 2px solid transparent;
  transition: color .15s var(--xo-ease), border-color .15s var(--xo-ease);
}
.xo-footer__legal-link:hover { color: var(--xo-lime); border-bottom-color: var(--xo-lime); }
.xo-footer__legal-link:focus-visible { outline: 3px solid var(--xo-lime); outline-offset: 3px; }

/* ---------- 8. 通用排版与容器 ---------- */
.xo-wrap {
  width: 100%;
  max-width: var(--xo-wrap-width);
  margin-inline: auto;
  padding-inline: var(--xo-gutter);
}
.xo-section { padding-block: clamp(40px, 6vw, 84px); }
.xo-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--xo-font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--xo-sea);
}
.xo-eyebrow::before {
  content: "";
  width: 20px;
  height: 3px;
  background: var(--xo-orange);
}
.xo-num {
  font-family: var(--xo-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}
.xo-rule {
  height: 0;
  margin: clamp(28px, 5vw, 56px) 0;
  border: 0;
  border-top: 3px solid var(--xo-ink);
  position: relative;
}
.xo-rule::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 34px;
  height: 9px;
  background: var(--xo-orange);
}
.xo-aside {
  padding-left: 16px;
  border-left: 3px solid var(--xo-orange);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(16, 35, 31, .74);
}

/* ---------- 9. 通用组件 ---------- */
.xo-prose { max-width: 68ch; font-size: 17px; line-height: 1.8; }
.xo-prose > * + * { margin-top: 1.05em; }
.xo-prose h2 { margin-top: 1.9em; }
.xo-prose ul { padding-left: 1.2em; list-style: disc; }
.xo-prose li + li { margin-top: .35em; }

.xo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  background: var(--xo-sand);
  color: var(--xo-ink);
  border: var(--xo-border);
  border-radius: var(--xo-pill);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--xo-shadow-sm);
  transition: transform .15s var(--xo-ease), box-shadow .15s var(--xo-ease),
              background-color .15s var(--xo-ease), color .15s var(--xo-ease);
}
.xo-btn:hover { transform: translate(2px, 2px); box-shadow: 1px 1px 0 0 var(--xo-ink); }
.xo-btn:focus-visible { outline: 3px solid var(--xo-sea); outline-offset: 3px; }
.xo-btn--solid { background: var(--xo-orange); color: var(--xo-ink); }
.xo-btn--solid:hover { background: var(--xo-ink); color: var(--xo-lime); }
.xo-btn--ghost {
  background: transparent;
  border-color: rgba(16, 35, 31, .38);
  box-shadow: none;
}
.xo-btn--ghost:hover { background: var(--xo-apricot); border-color: var(--xo-ink); transform: none; }

.xo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 2px solid currentColor;
  border-radius: var(--xo-pill);
  font-family: var(--xo-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--xo-ink);
}

.xo-panel {
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--xo-paper);
  border: var(--xo-border);
  border-radius: var(--xo-radius);
  box-shadow: var(--xo-shadow);
}

.xo-breadcrumb { padding-top: 18px; }
.xo-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--xo-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: rgba(16, 35, 31, .66);
}
.xo-breadcrumb li { display: flex; align-items: center; gap: 6px; }
.xo-breadcrumb li + li::before { content: "/"; color: var(--xo-orange); }
.xo-breadcrumb a {
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .15s var(--xo-ease), color .15s var(--xo-ease);
}
.xo-breadcrumb a:hover { color: var(--xo-ink); border-bottom-color: var(--xo-orange); }
.xo-breadcrumb [aria-current="page"] { color: var(--xo-ink); }

.xo-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}
.xo-grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.xo-grid--aside { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.xo-col-4 { grid-column: span 4; }
.xo-col-5 { grid-column: span 5; }
.xo-col-6 { grid-column: span 6; }
.xo-col-7 { grid-column: span 7; }
.xo-col-8 { grid-column: span 8; }
.xo-col-12 { grid-column: span 12; }

.xo-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: var(--xo-mist);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(255, 107, 44, .30), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(21, 122, 156, .34), transparent 46%);
  border: var(--xo-border);
  border-radius: 20px;
  box-shadow: var(--xo-shadow);
}
.xo-media img,
.xo-media video { width: 100%; height: 100%; object-fit: cover; }
.xo-media--wide { aspect-ratio: 21 / 9; }
.xo-media--square { aspect-ratio: 1 / 1; }
.xo-media--portrait { aspect-ratio: 3 / 4; }
.xo-media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background: var(--xo-sand);
  border-top: 3px solid var(--xo-ink);
  border-right: 3px solid var(--xo-ink);
  font-family: var(--xo-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--xo-ink);
}

.xo-data-band {
  padding-block: clamp(28px, 4.5vw, 56px);
  background: var(--xo-ink);
  color: var(--xo-sand);
  border-block: 3px solid var(--xo-lime);
}
.xo-data-band a { color: var(--xo-lime); }
.xo-data-band strong { color: var(--xo-lime); }
.xo-data-band .xo-eyebrow { color: var(--xo-lime); }
.xo-data-band .xo-eyebrow::before { background: var(--xo-orange); }

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1180px) {
  .xo-nav__link { font-size: 13px; padding: 7px 9px; }
  .xo-cta { padding: 9px 14px; font-size: 12.5px; }
  .xo-brand__mark { width: 34px; height: 34px; border-radius: 10px; font-size: 16px; }
}

@media (max-width: 960px) {
  .xo-header { padding-top: 12px; }
  .xo-header__inner {
    padding: 8px 10px 8px 12px;
    border-radius: 24px;
    box-shadow: 5px 5px 0 0 var(--xo-ink);
  }
  .xo-nav-toggle { display: inline-flex; }
  .xo-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 5;
    display: none;
    margin: 0;
    padding: 10px;
    background: var(--xo-sand);
    border: var(--xo-border);
    border-radius: 24px;
    box-shadow: 6px 6px 0 0 var(--xo-ink);
  }
  .xo-header[data-open] .xo-nav { display: block; }
  .xo-nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .xo-nav__link {
    display: block;
    padding: 12px 14px;
    font-size: 15px;
    border-radius: 14px;
  }
  .xo-nav__link[aria-current="page"] { padding-inline: 14px; }
  .xo-header__actions { margin-left: auto; }

  .xo-grid,
  .xo-grid--split,
  .xo-grid--aside { grid-template-columns: minmax(0, 1fr); }
  .xo-col-4, .xo-col-5, .xo-col-6, .xo-col-7, .xo-col-8 { grid-column: span 1; }

  .xo-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .xo-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .xo-brand__tag { display: none; }
  .xo-brand__name { font-size: 15px; }
  .xo-cta { padding: 8px 11px; font-size: 11.5px; border-width: 2px; box-shadow: 0 2px 0 0 var(--xo-ink); }
  .xo-nav-toggle { width: 42px; height: 38px; border-width: 2px; }
  .xo-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .xo-footer__ticker-inner { flex-direction: column; align-items: flex-start; }
  .xo-footer__legal { flex-direction: column; align-items: flex-start; gap: 8px; }
  .xo-footer__legal-links { margin-left: 0; }
  #main-content { scroll-margin-top: 96px; }
}

/* ---------- 11. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .xo-progress__bar { transition: none; }
}