/* =========================================================
   开云下注 · 乐动体育平台 — 共享样式 /assets/site.css
   语言：夜间球场灯光 + 数据面板，锐利直角、细线网格、等宽数字
   ========================================================= */

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

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

html:focus-within { scroll-behavior: smooth; }

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

ul[class],
ol[class] { list-style: none; padding: 0; }

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

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

button { background: none; border: 0; }

a { color: inherit; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色板 */
  --c-night: #06281F;
  --c-carbon: #0B0F10;
  --c-pitch: #0E3B2E;
  --c-ivory: #F4F1E8;
  --c-lime: #B6FF3B;
  --c-gold: #D6A84B;
  --c-orange: #FF6B2C;
  --c-cool: #9BA8A3;
  --c-aqua: #2BE7C8;
  --c-violet: #3A2A5A;
  --c-danger: #FF4D4D;

  /* 语义色 */
  --bg: var(--c-night);
  --panel: var(--c-pitch);
  --panel-deep: var(--c-carbon);
  --text: var(--c-ivory);
  --text-dim: var(--c-cool);
  --text-mid: rgba(244, 241, 232, 0.78);
  --line: rgba(244, 241, 232, 0.14);
  --line-soft: rgba(244, 241, 232, 0.08);
  --line-strong: rgba(244, 241, 232, 0.3);

  /* 字体 */
  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-editorial: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-data: "IBM Plex Mono", "Roboto Mono", "DIN Alternate", "SFMono-Regular", Consolas, "Courier New", monospace;

  /* 字号标尺 */
  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: clamp(22px, 2.4vw, 28px);
  --fs-40: clamp(30px, 4.2vw, 40px);
  --fs-64: clamp(40px, 6.4vw, 64px);
  --fs-96: clamp(56px, 10vw, 96px);

  /* 布局 */
  --shell: 1280px;
  --shell-narrow: 760px;
  --pad: clamp(16px, 4vw, 40px);
  --gutter: clamp(16px, 2.4vw, 32px);

  /* 动效 */
  --dur-fast: 180ms;
  --dur: 240ms;
  --dur-slow: 320ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(130% 80% at 50% -12%, rgba(58, 42, 90, 0.4), transparent 58%),
    repeating-linear-gradient(90deg, rgba(244, 241, 232, 0.03) 0 1px, transparent 1px 108px),
    repeating-linear-gradient(0deg, rgba(244, 241, 232, 0.022) 0 1px, transparent 1px 108px);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  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;
  letter-spacing: 0.06em;
  line-height: 1.14;
  text-wrap: balance;
}

h1 { font-size: var(--fs-40); }
h2 { font-size: var(--fs-28); }
h3 { font-size: var(--fs-20); letter-spacing: 0.05em; }

p { text-wrap: pretty; }

::selection {
  background: var(--c-lime);
  color: var(--c-night);
}

a {
  color: var(--c-aqua);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}

:focus-visible {
  outline: 2px solid var(--c-aqua);
  outline-offset: 3px;
}

#main-content { display: block; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: var(--pad);
  top: -80px;
  z-index: 140;
  padding: 12px 18px;
  background: var(--c-lime);
  color: var(--c-night);
  font-family: var(--font-data);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-decoration: none;
  transition: top var(--dur-fast) var(--ease);
}

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

/* ---------- 5. 容器与网格 ---------- */
.shell {
  width: min(100% - (var(--pad) * 2), var(--shell));
  margin-inline: auto;
}

.shell--wide { --shell: 1480px; }
.shell--narrow { --shell: var(--shell-narrow); }

.grid {
  display: grid;
  gap: var(--gutter);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--asym-rev { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: clamp(24px, 4vw, 48px) 0;
}

/* ---------- 6. 页头 · 状态轨道 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: var(--c-night);
}

.header-rail {
  background: var(--c-carbon);
  border-bottom: 1px solid var(--line-soft);
}

.header-rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 36px;
}

.rail-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
}

.rail-item--live { color: var(--c-lime); }

.rail-dot {
  width: 6px;
  height: 6px;
  background: var(--c-lime);
  animation: rail-pulse 2.6s ease-in-out infinite;
}

.rail-item--mid { color: var(--text-dim); }

.rail-item--link {
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.rail-item--link:hover,
.rail-item--link:focus-visible {
  color: var(--c-aqua);
  border-bottom-color: var(--c-aqua);
}

@keyframes rail-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.7); }
}

/* ---------- 7. 页头 · 刊头 ---------- */
.masthead-band {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(14px, 2vw, 22px);
  background:
    radial-gradient(120% 150% at 8% -30%, rgba(43, 231, 200, 0.1), transparent 58%),
    radial-gradient(100% 140% at 92% 130%, rgba(58, 42, 90, 0.55), transparent 62%);
  border-bottom: 1px solid var(--line-soft);
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 16px;
}

.masthead__issue {
  justify-self: start;
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--c-gold);
}

.masthead__issue-label,
.masthead__issue-value {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.masthead__issue-label { color: var(--c-gold); }
.masthead__issue-value { color: var(--text-dim); font-size: 12px; letter-spacing: 0.14em; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--c-ivory);
}

.masthead > .brand { justify-self: center; }

.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex: none;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
}

.brand__mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(214, 168, 75, 0.32);
  pointer-events: none;
}

.brand__word {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1;
  letter-spacing: 0.16em;
}

.brand__tag {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.masthead__tools {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ---------- 8. 导航与阅读进度 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 70;
  display: block;
  background: rgba(11, 15, 16, 0.95);
  border-bottom: 1px solid var(--line-strong);
}

.site-nav__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(10px, 2.6vw, 32px);
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--c-lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-list a:hover { color: var(--c-lime); }
.nav-list a:hover::after,
.nav-list a:focus-visible::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] { color: var(--c-lime); }

.nav-list a[aria-current="page"]::after {
  background: var(--c-gold);
  transform: scaleX(1);
}

.site-nav__foot {
  display: none;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
}

.site-nav__foot a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.site-nav__foot a:hover { color: var(--c-aqua); }

.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(244, 241, 232, 0.08);
  pointer-events: none;
}

.read-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-aqua), var(--c-lime) 58%, var(--c-gold));
  transition: width 120ms linear;
}

/* ---------- 9. 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

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

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--text);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
}

.btn--lime {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-night);
  font-weight: 700;
}

.btn--lime:hover,
.btn--lime:focus-visible {
  background: var(--c-aqua);
  border-color: var(--c-aqua);
}

.btn--gold {
  border-color: rgba(214, 168, 75, 0.6);
  color: var(--c-gold);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  border-color: var(--c-gold);
  background: rgba(214, 168, 75, 0.12);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

.btn--block { width: 100%; }

/* ---------- 11. 面包屑 ---------- */
.breadcrumbs {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(244, 241, 232, 0.28);
}

.breadcrumbs a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.breadcrumbs a:hover { color: var(--c-aqua); }

.breadcrumbs [aria-current="page"] { color: var(--c-ivory); }

/* ---------- 12. 正文字段 ---------- */
.prose {
  max-width: 72ch;
  color: var(--text-mid);
  font-size: var(--fs-16);
  line-height: 1.85;
}

.prose--narrow { max-width: 62ch; }

.prose > * + * { margin-top: 1.15em; }

.prose h2,
.prose h3 { color: var(--c-ivory); margin-top: 1.8em; }

.prose ul,
.prose ol {
  padding-left: 1.3em;
  list-style: disc;
}

.prose li + li { margin-top: 0.4em; }

.prose a {
  color: var(--c-aqua);
  text-underline-offset: 0.32em;
}

.prose strong { color: var(--c-ivory); font-weight: 500; }

.lede {
  max-width: 62ch;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.9);
}

/* ---------- 13. 章节抬头与标签 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 3vw, 36px);
  border-bottom: 1px solid var(--line);
}

.section-head h2,
.section-head h1 { margin: 0; }

.eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--c-gold);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.tag--lime { color: var(--c-lime); border-color: rgba(182, 255, 59, 0.45); }
.tag--gold { color: var(--c-gold); border-color: rgba(214, 168, 75, 0.45); }
.tag--aqua { color: var(--c-aqua); border-color: rgba(43, 231, 200, 0.45); }
.tag--orange { color: var(--c-orange); border-color: rgba(255, 107, 44, 0.5); }
.tag--danger { color: var(--c-danger); border-color: rgba(255, 77, 77, 0.5); }

.tag[aria-pressed="true"],
.tag[data-active] {
  background: rgba(182, 255, 59, 0.12);
  border-color: var(--c-lime);
  color: var(--c-lime);
}

/* ---------- 14. 资料卡与数据面板 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  transition: border-color var(--dur-fast) var(--ease);
}

.card:hover { border-color: var(--line-strong); }

.card--dossier::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--c-gold);
}

.card__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat-strip__cell {
  padding: clamp(16px, 2vw, 24px);
  background: var(--c-night);
}

.num {
  font-family: var(--font-data);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.figure {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: var(--fs-64);
  line-height: 0.95;
  letter-spacing: -0.01em;
  color: var(--c-lime);
  font-variant-numeric: tabular-nums;
}

.figure--gold { color: var(--c-gold); }
.figure--orange { color: var(--c-orange); }

/* ---------- 15. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(160deg, var(--c-pitch), var(--c-carbon) 72%);
  border: 1px solid var(--line);
}

.media-frame img,
.media-frame__img {
  width: 100%;
  height: 100%;
  aspect-ratio: var(--frame-ratio, 16 / 9);
  object-fit: cover;
  filter: saturate(0.95) contrast(1.04);
}

.media-frame--wide { --frame-ratio: 21 / 9; }
.media-frame--tall { --frame-ratio: 4 / 5; }
.media-frame--square { --frame-ratio: 1 / 1; }

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
  pointer-events: none;
}

.media-frame:hover::after { border-color: rgba(182, 255, 59, 0.5); }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 8px 12px;
  background: rgba(11, 15, 16, 0.86);
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 16. 滚动显现 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

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

/* ---------- 17. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(56px, 8vw, 120px);
  background:
    linear-gradient(180deg, rgba(6, 40, 31, 0.55), rgba(11, 15, 16, 0.96) 55%),
    var(--c-carbon);
  border-top: 1px solid var(--line-strong);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(40px, 6vw, 72px) 0 clamp(32px, 4vw, 52px);
}

.footer-brand {
  display: grid;
  gap: 18px;
  align-content: start;
}

.brand--footer .brand__mark {
  width: 44px;
  height: 44px;
  font-size: 24px;
}

.brand--footer .brand__name { font-size: 26px; }

.footer-brand__note {
  max-width: 34ch;
  color: var(--text-mid);
  font-size: 14px;
  line-height: 1.8;
}

.footer-brand__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.footer-brand__meta-label {
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  align-content: start;
}

.footer-col__heading {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-gold);
}

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

.footer-col__list a {
  color: var(--text-mid);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible { color: var(--c-lime); }

.footer-contact {
  display: grid;
  gap: 16px;
  align-content: start;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  display: grid;
  gap: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.contact-list__label {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.contact-list__value {
  color: var(--c-ivory);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

.footer-contact__note {
  max-width: 40ch;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.8;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding: 20px 0 30px;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.footer-base__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.footer-base__links a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.footer-base__links a:hover,
.footer-base__links a:focus-visible { color: var(--c-aqua); }

.footer-base__icp { color: var(--c-gold); }

.pitch-arc {
  position: absolute;
  left: 50%;
  bottom: clamp(-420px, -34vw, -240px);
  width: min(980px, 125vw);
  aspect-ratio: 1 / 1;
  transform: translateX(-50%);
  border: 1px solid rgba(182, 255, 59, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.pitch-arc::before {
  content: "";
  position: absolute;
  inset: 14%;
  border: 1px solid rgba(214, 168, 75, 0.1);
  border-radius: 50%;
}

/* ---------- 18. 平板 ---------- */
@media (max-width: 1023px) {
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 899px) {
  .grid--12,
  .grid--asym,
  .grid--asym-rev { grid-template-columns: minmax(0, 1fr); }

  .span-3, .span-4, .span-5, .span-6,
  .span-7, .span-8, .span-12 { grid-column: 1 / -1; }

  .masthead { grid-template-columns: minmax(0, 1fr) auto; }
  .masthead__issue { display: none; }
  .masthead > .brand { grid-column: 1; grid-row: 1; justify-self: start; }
  .masthead__tools { grid-column: 2; grid-row: 1; }

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

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

  .site-nav__inner {
    align-items: stretch;
    gap: 14px;
    padding: 14px 0 20px;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 14px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
    letter-spacing: 0.14em;
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    padding-left: 12px;
    border-left: 2px solid var(--c-lime);
    color: var(--c-lime);
  }

  .site-nav__foot { display: flex; padding-left: 4px; }
}

/* ---------- 19. 手机 ---------- */
@media (max-width: 640px) {
  .rail-item--mid { display: none; }
  .masthead__cta { display: none; }
  .brand__tag { display: none; }
  .brand__mark { width: 44px; height: 44px; font-size: 24px; }
  .brand__name { font-size: 22px; }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- 20. 降级动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .has-js [data-reveal],
  .has-js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }

  .read-progress__bar { transition: none; }
}