/* ============================================================
   华体育网看台 · /assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、通用组件
   ============================================================ */

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

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

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

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

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

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

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink-night: #08130F;
  --stand-green: #0F2A22;
  --pitch-black: #040A08;
  --line-green: #1E3B33;
  --fluor-cyan: #4FE3C1;
  --ember-orange: #FF7A3D;
  --volt-purple: #8B6CFF;
  --fog-gray: #9AA8A2;
  --chalk-white: #F4F7F4;
  --paper-ash: #E6E3D8;

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

  --fs-meta: 12px;
  --fs-sm: 14px;
  --fs-body: 16px;
  --fs-lg: 19px;
  --fs-xl: 26px;
  --fs-2xl: 38px;
  --fs-3xl: 58px;

  --rail-w: 0px;
  --shell-x: clamp(18px, 4.2vw, 56px);
  --max-w: 1240px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

@media (min-width: 1060px) {
  :root { --rail-w: 92px; }
}

@media (max-width: 640px) {
  :root {
    --fs-meta: 11px;
    --fs-sm: 13px;
    --fs-body: 15px;
    --fs-lg: 18px;
    --fs-xl: 24px;
    --fs-2xl: 32px;
    --fs-3xl: 40px;
  }
}

/* ---------- 3. 基础排版 ---------- */
body {
  padding-left: var(--rail-w);
  min-height: 100vh;
  background-color: var(--ink-night);
  background-image:
    radial-gradient(1100px 520px at 82% -12%, rgba(79, 227, 193, .07), transparent 70%),
    radial-gradient(760px 420px at 8% 108%, rgba(139, 108, 255, .06), transparent 72%);
  background-repeat: no-repeat;
  color: var(--chalk-white);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .01em;
}

h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

strong { color: var(--chalk-white); font-weight: 600; }

::selection {
  background: var(--fluor-cyan);
  color: #04231C;
}

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

/* ---------- 4. 容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--shell-x);
}

.section { padding-block: clamp(44px, 7.5vw, 104px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.prose { max-width: 40em; }
.prose p { max-width: 38em; }
.prose p + p { margin-top: 1em; }

.prose ul,
.prose ol {
  max-width: 38em;
  padding-left: 1.2em;
  list-style: none;
}

.prose li { position: relative; padding-left: 1em; }
.prose li + li { margin-top: .45em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--fluor-cyan);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--fluor-cyan);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--line-green);
}

.section-title {
  font-size: clamp(var(--fs-xl), 4vw, var(--fs-2xl));
  margin-top: 10px;
  letter-spacing: -.005em;
}

.lede {
  margin-top: 12px;
  max-width: 34em;
  font-size: var(--fs-lg);
  line-height: 1.7;
  color: rgba(244, 247, 244, .78);
}

.note {
  font-size: var(--fs-sm);
  color: var(--fog-gray);
  line-height: 1.7;
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: repeating-linear-gradient(to right, var(--line-green) 0 6px, transparent 6px 12px);
}

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  font-size: var(--fs-2xl);
  line-height: 1;
  color: var(--chalk-white);
  letter-spacing: -.02em;
}

/* ---------- 5. 头部外壳 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: var(--ink-night);
}

/* 5.1 skip link */
.skip-link {
  position: absolute;
  left: calc(var(--rail-w) + 12px);
  top: -90px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--fluor-cyan);
  color: #04231C;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: 2px;
  transition: top .2s var(--ease);
}

.skip-link:focus {
  top: 12px;
  outline-offset: 2px;
}

/* 5.2 左侧品牌轨道 */
.stand-rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 30px 0 26px;
  background: var(--pitch-black);
  border-right: 1px solid var(--line-green);
  z-index: 80;
}

@media (min-width: 1060px) {
  .stand-rail { display: flex; }
}

.stand-rail__mark {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .44em;
  color: var(--chalk-white);
}

.stand-rail__ticks {
  flex: 1 1 auto;
  align-self: center;
  width: 1px;
  margin: 24px 0;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--line-green) 0,
    var(--line-green) 1px,
    transparent 1px,
    transparent 8px
  );
}

.stand-rail__season {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--fluor-cyan);
  opacity: .9;
}

/* 5.3 刊头 */
.masthead {
  position: relative;
  background: var(--ink-night);
  border-bottom: 1px solid var(--line-green);
  padding-inline: var(--shell-x);
}

.masthead__bar {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(10px, 2vw, 28px);
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(20px, 3vw, 30px) 0 clamp(14px, 2vw, 18px);
}

.masthead__scale {
  position: relative;
  height: 5px;
  border-bottom: 1px solid var(--line-green);
  background-image: repeating-linear-gradient(
    to right,
    var(--line-green) 0,
    var(--line-green) 1px,
    transparent 1px,
    transparent 11px
  );
  background-repeat: repeat-x;
  background-size: 12px 4px;
  background-position: bottom left;
  opacity: .9;
}

.masthead__scale::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 22%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--fluor-cyan));
}

.masthead__brand {
  text-align: center;
  min-width: 0;
}

.wordmark {
  position: relative;
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.14;
  letter-spacing: .09em;
  color: var(--chalk-white);
  white-space: nowrap;
}

.wordmark::after {
  content: "";
  display: block;
  height: 3px;
  margin-top: 8px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--fluor-cyan) 0%, var(--ember-orange) 58%, rgba(255, 122, 61, 0) 100%);
}

.masthead__tagline {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: .2em;
  color: var(--fog-gray);
}

/* 5.4 工具位 */
.masthead__utility {
  position: absolute;
  top: clamp(18px, 2.6vw, 26px);
  right: var(--shell-x);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
}

.season-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  border: 1px solid var(--line-green);
  border-radius: 2px;
  background: rgba(4, 10, 8, .62);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--chalk-white);
  white-space: nowrap;
}

.season-chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ember-orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 61, .16);
  animation: pulse-dot 2.6s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: .38; }
}

.term-search {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  border: 1px solid var(--line-green);
  border-radius: 2px;
  background: rgba(15, 42, 34, .55);
  color: var(--fog-gray);
  font-size: var(--fs-meta);
  letter-spacing: .06em;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.term-search:hover,
.term-search:focus-visible {
  border-color: var(--fluor-cyan);
  color: var(--chalk-white);
  background: rgba(15, 42, 34, .95);
}

.term-search__icon {
  position: relative;
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
}

.term-search__icon::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 5px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
}

/* 5.5 栏目导航 */
.mainnav {
  max-width: var(--max-w);
  margin-inline: auto;
  border-top: 1px solid var(--line-green);
}

.mainnav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(10px, 2.6vw, 36px);
  padding: 11px 0 13px;
}

.mainnav__item { display: block; }

.mainnav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px 9px;
  font-size: var(--fs-sm);
  letter-spacing: .16em;
  color: rgba(244, 247, 244, .7);
  transition: color .2s var(--ease);
}

.mainnav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--fluor-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease), background .24s var(--ease);
}

.mainnav__link:hover { color: var(--chalk-white); }
.mainnav__link:hover::after { transform: scaleX(1); }

.mainnav__link[aria-current="page"] { color: var(--fluor-cyan); }
.mainnav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--ember-orange);
}

/* 5.6 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 12px 0;
  margin-inline: auto;
  max-width: var(--max-w);
  border-top: 1px solid var(--line-green);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: .28em;
  color: var(--fog-gray);
  transition: color .2s var(--ease);
}

.nav-toggle:hover { color: var(--chalk-white); }

.nav-toggle__label { line-height: 1; }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 11px;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  color: var(--fluor-cyan);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(4.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-4.75px) rotate(-45deg);
}

/* 5.7 阅读进度条 */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(30, 59, 51, .55);
  overflow: hidden;
  pointer-events: none;
}

.scroll-meter__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--fluor-cyan), var(--volt-purple) 72%, var(--ember-orange));
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 7vw, 96px);
  background: var(--pitch-black);
  border-top: 1px solid var(--line-green);
  color: var(--chalk-white);
}

.site-footer__inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: clamp(38px, 5.5vw, 76px) var(--shell-x) clamp(24px, 3.5vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.6fr);
  gap: clamp(28px, 4vw, 72px);
}

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

.footer-lead__mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xl);
  letter-spacing: .1em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-green);
}

.footer-lead__note {
  margin-top: 14px;
  max-width: 30em;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--fog-gray);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 34px);
}

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

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .24em;
  color: var(--fluor-cyan);
  padding-bottom: 9px;
  margin-bottom: 13px;
  border-bottom: 1px solid var(--line-green);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.footer-col__list a {
  color: rgba(244, 247, 244, .76);
  transition: color .18s var(--ease);
}

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

.footer-col__list a[aria-current="page"] { color: var(--ember-orange); }

.footer-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--fog-gray);
  margin-bottom: 3px;
}

.footer-val {
  display: block;
  color: var(--chalk-white);
  font-size: var(--fs-sm);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.footer-base {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 18px var(--shell-x) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 28px;
  font-size: var(--fs-meta);
  color: var(--fog-gray);
  border-top: 1px dashed var(--line-green);
}

.footer-base__note { max-width: 46em; }
.footer-base__copy { font-family: var(--font-mono); letter-spacing: .08em; }

/* 6.1 刻度绳回到顶部 */
.to-top {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  margin: 0 auto;
  padding: 22px 16px 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--fog-gray);
  transition: color .2s var(--ease);
}

.to-top:hover,
.to-top:focus-visible { color: var(--fluor-cyan); }

.to-top__rope {
  position: relative;
  display: block;
  width: 1px;
  height: 46px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--line-green) 0,
    var(--line-green) 4px,
    transparent 4px,
    transparent 8px
  );
  transition: background-color .2s var(--ease);
}

.to-top__rope::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 8px;
  height: 8px;
  border-left: 1.5px solid var(--fluor-cyan);
  border-top: 1.5px solid var(--fluor-cyan);
  transform: translateX(-50%) rotate(45deg);
}

.to-top:hover .to-top__rope,
.to-top:focus-visible .to-top__rope {
  background-image: repeating-linear-gradient(
    to bottom,
    var(--fluor-cyan) 0,
    var(--fluor-cyan) 4px,
    transparent 4px,
    transparent 8px
  );
}

.to-top__text { line-height: 1; }

/* ---------- 7. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: .1em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--ember {
  background: var(--ember-orange);
  border-color: var(--ember-orange);
  color: #180A03;
}

.btn--ember:hover { background: #FF9159; border-color: #FF9159; }

.btn--cyan {
  background: var(--fluor-cyan);
  border-color: var(--fluor-cyan);
  color: #04231C;
}

.btn--cyan:hover { background: #79EBD0; border-color: #79EBD0; }

.btn--ghost {
  background: transparent;
  border-color: var(--line-green);
  color: var(--chalk-white);
}

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

.tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line-green);
  border-radius: 2px;
  background: rgba(15, 42, 34, .5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.5;
  color: var(--fog-gray);
}

.tag--cyan { color: var(--fluor-cyan); border-color: rgba(79, 227, 193, .42); }
.tag--orange { color: var(--ember-orange); border-color: rgba(255, 122, 61, .42); }
.tag--purple { color: var(--volt-purple); border-color: rgba(139, 108, 255, .42); }

.panel {
  padding: clamp(18px, 2.6vw, 30px);
  background: var(--stand-green);
  border: 1px solid var(--line-green);
  border-radius: 2px;
}

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--stand-green);
  border: 1px solid var(--line-green);
  border-radius: 2px;
  transition: border-color .22s var(--ease), background-color .22s var(--ease);
}

.card::before,
.card::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 11px;
  border-color: var(--fluor-cyan);
  border-style: solid;
  opacity: 0;
  transition: opacity .22s var(--ease);
}

.card::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.card::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

.card:hover {
  border-color: var(--fluor-cyan);
  background: #113027;
}

.card:hover::before,
.card:hover::after { opacity: 1; }

.frame {
  position: relative;
  border: 1px solid var(--line-green);
  border-radius: 2px;
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 13px;
  height: 13px;
  border-color: var(--fluor-cyan);
  border-style: solid;
  opacity: .75;
}

.frame::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.frame::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

/* 7.1 图片容器 */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line-green);
  border-radius: 2px;
  background:
    linear-gradient(155deg, #0F2A22 0%, #040A08 82%),
    radial-gradient(420px 220px at 78% 12%, rgba(79, 227, 193, .12), transparent 70%);
}

.media::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media--4x3::before { padding-top: 75%; }
.media--1x1::before { padding-top: 100%; }
.media--21x9::before { padding-top: 42.86%; }

.media > img,
.media > video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 14px 10px;
  font-size: var(--fs-meta);
  line-height: 1.5;
  color: var(--fog-gray);
  background: linear-gradient(180deg, rgba(4, 10, 8, 0), rgba(4, 10, 8, .88));
}

/* 7.2 面包屑 */
.breadcrumb { padding-top: 16px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: .08em;
  color: var(--fog-gray);
}

.breadcrumb__item { display: inline-flex; align-items: center; }

.breadcrumb__item::after {
  content: "/";
  margin-left: 8px;
  color: var(--line-green);
}

.breadcrumb__item:last-child::after { content: none; }

.breadcrumb__item a { transition: color .18s var(--ease); }
.breadcrumb__item a:hover,
.breadcrumb__item a:focus-visible { color: var(--fluor-cyan); }

.breadcrumb__item[aria-current="page"] { color: var(--chalk-white); }

/* 7.3 可展开内容组 */
.expand-panel { display: none; }
.expand-panel[data-open] { display: block; }

/* 7.4 筛选标签 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border: 1px solid var(--line-green);
  border-radius: 2px;
  background: rgba(15, 42, 34, .5);
  font-size: var(--fs-sm);
  letter-spacing: .06em;
  color: var(--fog-gray);
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.chip:hover { border-color: var(--fluor-cyan); color: var(--chalk-white); }

.chip.is-on,
.chip[aria-pressed="true"] {
  background: var(--fluor-cyan);
  border-color: var(--fluor-cyan);
  color: #04231C;
}

[data-chip-group] {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

/* 7.5 进入视口渐显 */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .32s var(--ease), transform .32s var(--ease);
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1000px) {
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .footer-lead__note { max-width: 40em; }
}

@media (max-width: 899px) {
  .masthead__bar {
    padding-top: 20px;
    padding-bottom: 8px;
  }

  .masthead__scale { height: 4px; }

  .masthead__utility {
    position: static;
    justify-content: center;
    flex-wrap: wrap;
    margin: 6px auto 12px;
    right: auto;
    top: auto;
  }

  .nav-toggle { display: flex; }

  .mainnav {
    display: none;
    border-top: 1px solid var(--line-green);
  }

  .site-header[data-open] .mainnav,
  .mainnav[data-open] { display: block; }

  .mainnav__list {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 2px;
    padding: 6px 0 12px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .mainnav__list::-webkit-scrollbar { display: none; }

  .mainnav__item { flex: 0 0 auto; }

  .mainnav__link {
    white-space: nowrap;
    padding: 9px 13px;
    letter-spacing: .12em;
  }

  .mainnav__link::after { left: 13px; right: 13px; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .stand-rail { display: none; }
  .to-top { padding-bottom: 24px; }
}

/* ---------- 9. 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .mainnav__link::after { transition: none !important; }
}