/* =========================================================
   YD赛场 · /assets/site.css
   共享层：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, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd, fieldset { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, picture, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--cyan-signal); outline-offset: 3px; border-radius: 3px; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink-green-base: #0B1F1A;
  --deep-green-layer: #102E26;
  --glass-green: rgba(26, 61, 52, 0.62);
  --cyan-signal: #2BF0C8;
  --cyan-deep: #0FA88C;
  --orange-signal: #FF6A2B;
  --card-red: #E10600;
  --card-yellow: #FFD400;
  --paper-light: #EAF3F0;
  --mist-gray: #8FA9A1;

  --line-soft: rgba(143, 169, 161, 0.22);
  --line-cyan: rgba(43, 240, 200, 0.24);
  --wash-cyan: rgba(43, 240, 200, 0.10);
  --wash-orange: rgba(255, 106, 43, 0.10);

  --font-heading: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-data: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Roboto Mono", "Liberation Mono", monospace;

  --shell-max: 1320px;
  --gutter: 24px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 64px;
  --space-6: 96px;

  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 18px;

  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --strip-h: 44px;
  --masthead-h: 64px;
  --header-offset: calc(var(--strip-h) + var(--masthead-h));
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-green-base);
  background-image:
    radial-gradient(1200px 620px at 12% -10%, rgba(43, 240, 200, 0.10), transparent 62%),
    radial-gradient(900px 520px at 96% 4%, rgba(255, 106, 43, 0.09), transparent 60%),
    radial-gradient(760px 640px at 50% 120%, rgba(15, 168, 140, 0.14), transparent 66%);
  background-attachment: fixed;
  color: var(--paper-light);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: 0.04em;
  color: var(--paper-light);
  text-transform: uppercase;
}
h1 { font-size: clamp(2.1rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.4rem); }
h3 { font-size: clamp(1.12rem, 1.9vw, 1.5rem); letter-spacing: 0.03em; }
h4 { font-size: 1.05rem; letter-spacing: 0.06em; }

p { line-height: 1.75; }
strong { color: var(--paper-light); font-weight: 700; }
[data-num], .data-figure, code, kbd { font-family: var(--font-data); font-variant-numeric: tabular-nums; }
[hidden] { display: none !important; }
[id] { scroll-margin-top: calc(var(--header-offset) + 20px); }

::selection { background: var(--cyan-signal); color: var(--ink-green-base); }

/* ---------- 4. 无障碍与通用工具 ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  background: var(--cyan-signal);
  color: var(--ink-green-base);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: top 0.18s var(--ease-out);
}
.skip-link:focus { top: 0; }

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.prose { max-width: 68ch; }
.prose p + p { margin-top: 1em; }
.hairline { height: 1px; border: 0; background: var(--line-soft); }

.section { padding-block: var(--space-6); }
.section__head { display: grid; gap: 14px; margin-bottom: var(--space-4); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-signal);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.grid { display: grid; gap: var(--space-3); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--space-2); }
.grid--aside { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: var(--space-5); }
.span-4 { grid-column: span 4; }
.span-8 { grid-column: span 8; }

.panel {
  padding: var(--space-3);
  border-radius: var(--radius-m);
  background: var(--deep-green-layer);
  border: 1px solid var(--line-soft);
}
.panel--glass {
  background: var(--glass-green);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line-cyan);
}

/* ---------- 5. 面包屑 ---------- */
.crumbs { padding-block: var(--space-2); }
.crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 13px; color: var(--mist-gray); }
.crumbs__list li + li::before { content: "/"; margin-right: 10px; color: var(--cyan-deep); }
.crumbs__list a { color: var(--mist-gray); border-bottom: 1px solid transparent; transition: color 0.16s, border-color 0.16s; }
.crumbs__list a:hover { color: var(--cyan-signal); border-bottom-color: var(--line-cyan); }
.crumbs__list [aria-current="page"] { color: var(--paper-light); }

/* ---------- 6. 按钮 / 标签 / 统计 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1;
  transition: transform 0.12s var(--ease-out), background-color 0.18s, color 0.18s, border-color 0.18s;
}
.btn--signal { background: var(--orange-signal); color: #1A0B03; box-shadow: 0 10px 26px rgba(255, 106, 43, 0.24); }
.btn--signal:hover { background: #FF8149; transform: translateY(-1px); }
.btn--ghost { border-color: var(--line-cyan); color: var(--cyan-signal); }
.btn--ghost:hover { background: var(--wash-cyan); }
.btn--quiet { background: rgba(234, 243, 240, 0.06); border-color: var(--line-soft); color: var(--paper-light); }
.btn--quiet:hover { border-color: var(--line-cyan); color: var(--cyan-signal); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 3px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--line-soft);
  color: var(--mist-gray);
}
.tag--cyan { color: var(--cyan-signal); border-color: var(--line-cyan); background: var(--wash-cyan); }
.tag--orange { color: var(--orange-signal); border-color: rgba(255, 106, 43, 0.4); background: var(--wash-orange); }
.tag--red { color: #FF6F69; border-color: rgba(225, 6, 0, 0.5); background: rgba(225, 6, 0, 0.14); }
.tag--yellow { color: var(--card-yellow); border-color: rgba(255, 212, 0, 0.45); background: rgba(255, 212, 0, 0.12); }

.stat { display: grid; gap: 4px; }
.stat__value { font-family: var(--font-data); font-size: clamp(1.6rem, 3.4vw, 2.6rem); font-weight: 700; line-height: 1; color: var(--cyan-signal); }
.stat__label { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--mist-gray); }
.data-figure { font-size: 0.95em; color: var(--cyan-signal); letter-spacing: 0.04em; }

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.97), rgba(11, 31, 26, 0.88));
  border-bottom: 1px solid var(--line-cyan);
}

.strip { border-bottom: 1px solid rgba(43, 240, 200, 0.12); background: var(--glass-green); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.strip__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--strip-h);
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  overflow-x: auto;
  scrollbar-width: none;
}
.strip__inner::-webkit-scrollbar { display: none; }
.strip__live { display: inline-flex; align-items: center; gap: 9px; flex: 0 0 auto; }
.strip__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-signal);
  box-shadow: 0 0 0 0 rgba(43, 240, 200, 0.55);
  animation: pulse 2.4s var(--ease-out) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(43, 240, 200, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(43, 240, 200, 0); }
  100% { box-shadow: 0 0 0 0 rgba(43, 240, 200, 0); }
}
.strip__label { font-family: var(--font-data); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mist-gray); white-space: nowrap; }
.strip__group { display: flex; align-items: center; gap: 6px; flex: 0 0 auto; padding-left: 14px; border-left: 1px solid var(--line-soft); }

.chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(11, 31, 26, 0.42);
  color: var(--mist-gray);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.4;
  transition: color 0.16s, border-color 0.16s, background-color 0.16s;
}
.chip:hover { color: var(--paper-light); border-color: var(--line-cyan); }
.chip[aria-pressed="true"] { background: var(--cyan-signal); border-color: var(--cyan-signal); color: var(--ink-green-base); font-weight: 700; }
.chip--date[aria-pressed="true"] { background: var(--orange-signal); border-color: var(--orange-signal); color: #1A0B03; }

.strip__readout {
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-deep);
  white-space: nowrap;
}

.masthead__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--masthead-h);
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 10px var(--gutter);
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-s);
  background: linear-gradient(135deg, var(--cyan-signal), var(--cyan-deep));
  color: var(--ink-green-base);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: skewX(-14deg);
  box-shadow: 0 6px 18px rgba(43, 240, 200, 0.22);
}
.brand__mark > span { display: block; transform: skewX(14deg); }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-family: var(--font-heading); font-size: 19px; font-weight: 700; letter-spacing: 0.1em; color: var(--paper-light); }
.brand__sub { font-family: var(--font-data); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--mist-gray); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-cyan);
  color: var(--cyan-signal);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.nav-toggle__bars { position: relative; width: 18px; height: 2px; border-radius: 2px; background: currentColor; }
.nav-toggle__bars::before, .nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease-out), top 0.2s var(--ease-out);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav__list { display: flex; align-items: center; gap: 22px; }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 7px 0;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: rgba(234, 243, 240, 0.7);
  transition: color 0.16s;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan-signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease-out);
}
.site-nav__link:hover { color: var(--paper-light); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--paper-light); font-weight: 600; }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); background: linear-gradient(90deg, var(--cyan-signal), var(--orange-signal)); }
.site-nav__cta { padding: 10px 18px; font-size: 13px; }

.scroll-rail {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-signal), var(--orange-signal));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.1s linear;
  pointer-events: none;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  color: var(--mist-gray);
  font-size: 15px;
  background:
    linear-gradient(180deg, rgba(16, 46, 38, 0.6), rgba(7, 22, 18, 0.96) 44%, #071612 100%);
  border-top: 1px solid var(--line-cyan);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120px;
  height: 3px;
  background: var(--cyan-signal);
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(250px, 1.1fr) minmax(220px, 1fr) minmax(250px, 1.1fr);
  gap: var(--space-5);
}
.footer__brand { display: grid; gap: 14px; align-content: start; }
.brand--footer .brand__name { font-size: 21px; }
.footer__line { max-width: 40ch; color: rgba(234, 243, 240, 0.78); line-height: 1.7; }
.footer__meta { font-family: var(--font-data); font-size: 12px; letter-spacing: 0.08em; color: var(--mist-gray); }
.footer__title {
  margin-bottom: 16px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-signal);
}
.footer__nav { align-content: start; }
.footer__list { counter-reset: fl; display: grid; }
.footer__list li { counter-increment: fl; }
.footer__list a {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid rgba(143, 169, 161, 0.14);
  color: rgba(234, 243, 240, 0.78);
  transition: color 0.16s, padding-left 0.18s var(--ease-out);
}
.footer__list a::before {
  content: "0" counter(fl);
  margin-right: 12px;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--cyan-deep);
}
.footer__list a:hover { color: var(--cyan-signal); padding-left: 6px; }
.footer__list a[aria-current="page"] { color: var(--cyan-signal); }

.footer__contact { display: grid; align-content: start; }
.contact-list { display: grid; gap: 14px; }
.contact-list__item { display: grid; gap: 4px; }
.contact-list__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-gray);
}
.contact-list__value { color: rgba(234, 243, 240, 0.82); line-height: 1.6; }
.copy-btn {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 2px;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--paper-light);
  font-family: var(--font-data);
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: color 0.16s, border-color 0.16s;
}
.copy-btn:hover { color: var(--cyan-signal); border-bottom-color: var(--line-cyan); }
.copy-btn[data-state="copied"] { color: var(--cyan-signal); border-bottom-color: var(--cyan-signal); }
.copy-btn[data-state="error"] { color: var(--card-yellow); border-bottom-color: var(--card-yellow); }
.footer__note { margin-top: 18px; max-width: 42ch; font-size: 13px; line-height: 1.7; color: var(--mist-gray); }

.footer__legal { margin-top: var(--space-5); border-top: 1px solid var(--line-soft); }
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 20px var(--gutter) 28px;
  font-size: 13px;
}
.footer__legal-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__legal-links a { color: var(--mist-gray); border-bottom: 1px solid transparent; transition: color 0.16s, border-color 0.16s; }
.footer__legal-links a:hover { color: var(--cyan-signal); border-bottom-color: var(--line-cyan); }
.footer__icp { font-family: var(--font-data); font-size: 12px; letter-spacing: 0.06em; color: var(--mist-gray); }
.footer__slogan { font-family: var(--font-data); font-size: 12px; letter-spacing: 0.1em; color: var(--mist-gray); }

.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-cyan);
  background: rgba(26, 61, 52, 0.74);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--cyan-signal);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.24s var(--ease-out), transform 0.24s var(--ease-out);
}
.to-top.is-shown { opacity: 1; pointer-events: auto; transform: none; }
.to-top__arrow::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-left: 2px solid currentColor;
  border-top: 2px solid currentColor;
  transform: rotate(45deg) translate(1px, 1px);
}

/* ---------- 9. 图片容器（页面阶段放置占位） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
  background: var(--deep-green-layer);
}
.media__frame { position: relative; display: block; width: 100%; aspect-ratio: 16 / 9; }
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 3 / 4; }
.media--square .media__frame { aspect-ratio: 1 / 1; }
.media__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.media__caption { margin-top: 10px; font-size: 13px; letter-spacing: 0.02em; color: var(--mist-gray); }
.media--net .media__frame {
  background-image:
    repeating-linear-gradient(90deg, rgba(43, 240, 200, 0.14) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(0deg, rgba(43, 240, 200, 0.14) 0 1px, transparent 1px 14px),
    linear-gradient(160deg, #0B1F1A, #123A30);
}
.media--floodlight .media__frame {
  background-image:
    radial-gradient(120% 90% at 20% 0%, rgba(234, 243, 240, 0.26), transparent 55%),
    linear-gradient(200deg, #0B1F1A, #102E26 60%, #0B1F1A);
}
.media--grid .media__frame {
  background-image:
    linear-gradient(90deg, rgba(143, 169, 161, 0.18) 1px, transparent 1px),
    linear-gradient(0deg, rgba(143, 169, 161, 0.14) 1px, transparent 1px),
    linear-gradient(140deg, #0C241E, #0B1F1A);
  background-size: 44px 44px, 44px 44px, auto;
}

/* ---------- 10. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--aside { gap: var(--space-4); }
  .footer__grid { grid-template-columns: minmax(230px, 1fr) minmax(220px, 1fr); }
  .footer__contact { grid-column: span 2; }
}

@media (max-width: 980px) {
  :root { --gutter: 18px; }
  html.nav-open { overflow: hidden; }

  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    z-index: 75;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
    width: min(86vw, 340px);
    height: calc(100dvh - var(--header-offset));
    padding: 24px 24px 40px;
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(16, 46, 38, 0.98), rgba(11, 31, 26, 0.99));
    border-left: 1px solid var(--line-cyan);
    box-shadow: -26px 0 60px rgba(0, 0, 0, 0.45);
    visibility: hidden;
    transform: translateX(102%);
    transition: transform 0.32s var(--ease-out), visibility 0.32s;
  }
  .site-nav[data-open] { visibility: visible; transform: none; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__link { display: block; padding: 14px 0; border-bottom: 1px solid var(--line-soft); font-size: 17px; }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { color: var(--cyan-signal); padding-left: 12px; box-shadow: inset 3px 0 0 var(--cyan-signal); }
  .site-nav__cta { width: 100%; padding: 14px 18px; font-size: 14px; }

  .grid--aside { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .span-4, .span-8 { grid-column: span 12; }
  .section { padding-block: var(--space-5); }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .strip__readout { display: none; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .footer__contact { grid-column: auto; }
  .footer__legal-inner { flex-direction: column; align-items: flex-start; }
  .to-top { right: 14px; bottom: 14px; padding: 9px 13px; }
}

@media (max-width: 560px) {
  .strip__label { display: none; }
  .strip__group { padding-left: 10px; }
  .chip { padding: 5px 9px; font-size: 11px; }
  .brand__sub { display: none; }
  .masthead__inner { min-height: 58px; }
  .footer__list a::before { margin-right: 8px; }
}

/* ---------- 12. 弱动画模式 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .strip__pulse { animation: none; box-shadow: 0 0 0 3px rgba(43, 240, 200, 0.22); }
  .btn:hover, .to-top { transform: none; }
}