/* ============================================================
   安博赛场 /assets/site.css
   reset · 变量 · 中文排版 · 共享页头页脚 · 基础组件
   ============================================================ */

/* ---------- 01 reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: clip;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body, 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, picture { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
::selection { background: rgba(47, 243, 208, .3); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

/* ---------- 02 变量 ---------- */
:root {
  --void: #060B18;
  --panel: #0D1628;
  --panel-raised: #16223A;
  --ink: #F3F7FF;
  --ink-muted: #93A4C4;
  --neon-cyan: #2FF3D0;
  --amber: #FFB23F;
  --electric-violet: #8A6BFF;
  --cool-line: #22304C;
  --cyan-deep: #0F3B3A;

  --font-display: "Archivo Narrow", "Oswald", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --r-xs: 10px;
  --r-sm: 16px;
  --r-md: 22px;
  --r-lg: 28px;
  --r-pill: 999px;

  --wrap: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --rail: 88px;
  --gap: clamp(14px, 2.2vw, 28px);
  --dur: 200ms;
  --ease: cubic-bezier(.2, .7, .3, 1);
  --header-h: 112px;
}

/* ---------- 03 中文排版基底 ---------- */
body {
  min-height: 100vh;
  background-color: var(--void);
  background-image:
    radial-gradient(1020px 600px at 84% -8%, rgba(47, 243, 208, .09), transparent 62%),
    radial-gradient(760px 540px at 2% 4%, rgba(138, 107, 255, .11), transparent 58%),
    linear-gradient(180deg, #060B18 0%, #07101F 46%, #050A13 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (max-width: 760px) { body { background-attachment: scroll; } }
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.012em;
  text-wrap: balance;
  word-break: break-word;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.25rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); }
p { overflow-wrap: anywhere; }
[data-section] { scroll-margin-top: calc(var(--header-h) + 20px); }

/* ---------- 04 工具类 ---------- */
.wrap { width: min(calc(100% - 2 * var(--gutter)), var(--wrap)); margin-inline: auto; }
.has-rail { }
@media (min-width: 1100px) { .has-rail { padding-left: calc(var(--rail) + var(--gutter)); } }

.section { padding-block: clamp(52px, 7.5vw, 100px); }
.section--tight { padding-block: clamp(30px, 4vw, 56px); }

.section-head { display: grid; gap: 12px; margin-bottom: clamp(24px, 3.4vw, 44px); }
.section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}
.section-head__title { font-size: clamp(1.7rem, 3.4vw, 2.25rem); }
.section-head__lead { max-width: 60ch; color: var(--ink-muted); font-size: 16px; }

.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.8rem, 8.4vw, 6.4rem);
  line-height: .94;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.muted { color: var(--ink-muted); }
.caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-muted);
}
.link-underline {
  color: var(--neon-cyan);
  border-bottom: 1px solid rgba(47, 243, 208, .42);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.link-underline:hover { color: var(--ink); border-color: var(--ink); }
.divider { height: 1px; border: 0; background: var(--cool-line); margin-block: clamp(24px, 4vw, 46px); }
.prose { max-width: 64ch; color: var(--ink); }
.prose > * + * { margin-top: 1em; }
.prose ul, .prose ol { display: grid; gap: 8px; }
.prose li { position: relative; padding-left: 18px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-cyan);
}
.prose strong { color: var(--neon-cyan); font-weight: 700; }

.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.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; }
@media (max-width: 960px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5 { grid-column: span 3; }
  .span-7, .span-8 { grid-column: span 6; }
}
@media (max-width: 620px) {
  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 2; }
}

/* ---------- 05 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .05em;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn--cyan { background: var(--neon-cyan); color: #04241F; box-shadow: 0 16px 36px -18px rgba(47, 243, 208, .9); }
.btn--cyan:hover { transform: translateY(-2px); }
.btn--amber { background: var(--amber); color: #2A1700; box-shadow: 0 16px 36px -18px rgba(255, 178, 63, .85); }
.btn--amber:hover { transform: translateY(-2px); }
.btn--ghost { background: rgba(13, 22, 40, .66); border-color: var(--cool-line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--neon-cyan); color: var(--neon-cyan); transform: translateY(-2px); }
.btn__arrow::after { content: "→"; font-family: var(--font-mono); font-size: 14px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--cool-line);
  background: rgba(22, 34, 58, .55);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-muted);
}
.chip--cyan { color: var(--neon-cyan); border-color: rgba(47, 243, 208, .35); background: var(--cyan-deep); }
.chip--amber { color: var(--amber); border-color: rgba(255, 178, 63, .38); background: rgba(255, 178, 63, .1); }
.chip--violet { color: var(--electric-violet); border-color: rgba(138, 107, 255, .42); background: rgba(138, 107, 255, .13); }

/* ---------- 06 卡片 / 数据 / 面包屑 ---------- */
.panel {
  background: linear-gradient(180deg, rgba(22, 34, 58, .55) 0%, rgba(13, 22, 40, .88) 100%);
  border: 1px solid var(--cool-line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 2.6vw, 32px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.panel--raise { background: var(--panel-raised); }
.panel--hover:hover { border-color: rgba(47, 243, 208, .55); transform: translateY(-3px); }

.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--gap); }
.stat { display: grid; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--neon-cyan);
  font-variant-numeric: tabular-nums;
}
.stat__num--amber { color: var(--amber); }
.stat__label { font-size: 12.5px; letter-spacing: .1em; color: var(--ink-muted); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-muted);
}
.breadcrumb a:hover { color: var(--neon-cyan); }
.breadcrumb__sep { color: var(--cool-line); }

/* ---------- 07 图片容器（供页面阶段放图） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--cool-line);
  aspect-ratio: 16 / 9;
  background-color: var(--panel);
  background-image:
    radial-gradient(120% 90% at 78% 10%, rgba(47, 243, 208, .16), transparent 62%),
    linear-gradient(150deg, #0D1628 0%, #060B18 72%);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .7;
  background-image:
    linear-gradient(rgba(34, 48, 76, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 48, 76, .38) 1px, transparent 1px);
  background-size: 38px 38px;
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__tag { position: absolute; left: 16px; bottom: 16px; z-index: 2; }

/* ---------- 08 折叠组 ---------- */
.accordion { display: grid; gap: 10px; }
.accordion__item {
  border: 1px solid var(--cool-line);
  border-radius: var(--r-md);
  background: rgba(13, 22, 40, .74);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}
.accordion__item[data-open] { border-color: rgba(47, 243, 208, .5); }
.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--ink);
}
.accordion__index { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--ink-muted); }
.accordion__icon {
  margin-left: auto;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--cool-line);
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.accordion__icon::before { content: "+"; }
.accordion__trigger[aria-expanded="true"] .accordion__icon { transform: rotate(45deg); border-color: var(--neon-cyan); }
.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease);
}
.accordion__panel[data-open] { grid-template-rows: 1fr; }
.accordion__body { min-height: 0; overflow: hidden; padding-inline: 22px; color: var(--ink-muted); }
.accordion__body > :last-child { padding-bottom: 22px; }

/* ---------- 09 左侧数据轨道 ---------- */
.rail {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail);
  z-index: 90;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding-top: calc(var(--header-h) + 26px);
  border-right: 1px solid var(--cool-line);
  background: linear-gradient(180deg, rgba(13, 22, 40, .94) 0%, rgba(6, 11, 24, .55) 100%);
  overflow-y: auto;
}
@media (min-width: 1100px) { .rail { display: flex; } }
.rail__item {
  display: grid;
  justify-items: center;
  gap: 2px;
  width: 56px;
  padding: 9px 0 8px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  color: var(--ink-muted);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.rail__item:hover { color: var(--ink); background: var(--panel-raised); border-color: var(--cool-line); }
.rail__item.is-active { color: var(--neon-cyan); background: var(--cyan-deep); border-color: rgba(47, 243, 208, .4); }
.rail__num { font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em; }
.rail__label { font-size: 10px; line-height: 1.2; letter-spacing: .06em; text-align: center; }

/* ---------- 10 动效基础 ---------- */
.reveal { transition: opacity 420ms var(--ease), transform 420ms var(--ease); }
.js-ready .reveal { opacity: 0; transform: translateY(18px); }
.js-ready .reveal.is-visible { opacity: 1; transform: none; }
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon-cyan), var(--electric-violet));
}

/* ---------- 11 共享页头 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  background: var(--neon-cyan);
  color: #04241F;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .05em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(6, 11, 24, .97) 0%, rgba(6, 11, 24, .86) 100%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  border-bottom: 1px solid var(--cool-line);
}

.topbar { background: rgba(13, 22, 40, .74); border-bottom: 1px solid var(--cool-line); }
.topbar__inner {
  width: min(calc(100% - 2 * var(--gutter)), var(--wrap));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 42px;
  padding-block: 6px;
  font-size: 13px;
}
.topbar__brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 9px;
  background: var(--neon-cyan);
  color: #04241F;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 14px;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(47, 243, 208, .4), 0 10px 24px -12px rgba(47, 243, 208, .9);
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .07em;
  color: var(--ink);
}
.brand-domain {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--ink-muted);
  white-space: nowrap;
}
.topbar__meta { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 12px; }
.ver-chip {
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(47, 243, 208, .32);
  background: var(--cyan-deep);
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
}
.meta-link {
  color: var(--ink-muted);
  border-bottom: 1px dashed rgba(147, 164, 196, .45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.meta-link:hover { color: var(--neon-cyan); border-color: var(--neon-cyan); }
.meta-mail { font-family: var(--font-mono); font-size: 12px; color: var(--ink-muted); white-space: nowrap; }

.navbar__inner {
  width: min(calc(100% - 2 * var(--gutter)), var(--wrap));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  min-height: 62px;
  padding-block: 8px;
}
.nav { flex: 1 1 auto; min-width: 0; }
.nav__label { display: none; }
.nav__list { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.nav__item { display: block; }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 15px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  letter-spacing: .05em;
  color: var(--ink-muted);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background: var(--neon-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--ink); background: var(--panel-raised); border-color: var(--cool-line); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link[aria-current="page"] {
  color: var(--ink);
  background: rgba(47, 243, 208, .08);
  border-color: rgba(47, 243, 208, .28);
}
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.cta-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-pill);
  background: var(--neon-cyan);
  color: #04241F;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .05em;
  white-space: nowrap;
  box-shadow: 0 14px 32px -16px rgba(47, 243, 208, .95);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), filter var(--dur) var(--ease);
}
.cta-chip::after { content: "↗"; font-family: var(--font-mono); font-size: 13px; }
.cta-chip:hover { transform: translateY(-2px); filter: brightness(1.06); }

.nav-toggle {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--cool-line);
  background: rgba(22, 34, 58, .7);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .08em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--neon-cyan); color: var(--neon-cyan); }
.nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background-color var(--dur) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.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); }

/* ---------- 12 共享页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 128px);
  border-top: 1px solid var(--cool-line);
  background: linear-gradient(180deg, rgba(13, 22, 40, .86) 0%, rgba(6, 11, 24, .98) 64%);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47, 243, 208, .65), transparent);
}
.site-footer::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -200px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(138, 107, 255, .22), transparent 68%);
}
.footer__inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 2 * var(--gutter)), var(--wrap));
  margin-inline: auto;
  padding-block: clamp(44px, 6vw, 80px) 24px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
  gap: clamp(26px, 3.4vw, 48px) clamp(16px, 2.6vw, 36px);
}
.footer__col { min-width: 0; }
.footer__brand { display: flex; align-items: center; gap: 10px; }
.footer__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: var(--neon-cyan);
  color: #04241F;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1;
}
.footer__name { font-family: var(--font-display); font-weight: 800; font-size: 19px; letter-spacing: .06em; }
.footer__tagline {
  margin-top: 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 22px);
  letter-spacing: .02em;
  color: var(--ink);
}
.footer__note { margin-top: 10px; max-width: 30ch; font-size: 13.5px; color: var(--ink-muted); }
.footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.footer__list { display: grid; gap: 9px; }
.footer__link {
  position: relative;
  display: inline-block;
  font-size: 14.5px;
  color: rgba(243, 247, 255, .8);
  transition: color var(--dur) var(--ease);
}
.footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--neon-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.footer__link:hover { color: var(--neon-cyan); }
.footer__link:hover::after { transform: scaleX(1); }
.footer__list--plain { color: var(--ink-muted); font-size: 14px; gap: 7px; }
.footer__list--plain li { overflow-wrap: anywhere; }
.footer__base {
  margin-top: clamp(32px, 4.5vw, 56px);
  padding-top: 20px;
  border-top: 1px solid var(--cool-line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--ink-muted);
}
.footer__icp { color: var(--ink-muted); }

/* ---------- 13 响应式 ---------- */
@media (max-width: 960px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    bottom: 0;
    width: min(320px, 86vw);
    z-index: 130;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 24px 20px 44px;
    overflow-y: auto;
    background: linear-gradient(170deg, #0D1628 0%, #070D1B 100%);
    border-top: 1px solid var(--cool-line);
    border-right: 1px solid var(--cool-line);
    transform: translateX(-104%);
    transition: transform var(--dur) var(--ease);
    box-shadow: 28px 0 70px -34px rgba(0, 0, 0, .95);
  }
  .nav[data-open] { transform: translateX(0); }
  .nav__label {
    display: block;
    padding: 0 6px 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--ink-muted);
  }
  .nav__list { flex-direction: column; align-items: stretch; gap: 6px; }
  .nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 16px;
    border-radius: var(--r-sm);
    border-color: var(--cool-line);
    background: rgba(22, 34, 58, .55);
    font-size: 17px;
    color: var(--ink);
  }
  .nav__link::after {
    left: auto;
    right: 16px;
    top: 50%;
    bottom: auto;
    width: 26px;
    transform: translateY(-50%) scaleX(0);
    transform-origin: right center;
  }
  .nav__link:hover::after,
  .nav__link[aria-current="page"]::after { transform: translateY(-50%) scaleX(1); }
  .nav__link[aria-current="page"] { background: rgba(47, 243, 208, .12); }
  body.nav-open { overflow: hidden; }
  body.nav-open::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(4, 8, 16, .66);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
  }
}
@media (max-width: 760px) {
  .cta-chip { padding: 10px 16px; font-size: 13px; }
  .brand-domain { display: none; }
}
@media (max-width: 560px) {
  .footer__grid { grid-template-columns: 1fr; }
  .meta-mail { display: none; }
  .topbar__inner { min-height: 38px; }
  .navbar__inner { min-height: 56px; }
  .footer__base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 14 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .js-ready .reveal { opacity: 1; transform: none; }
  .panel--hover:hover,
  .btn:hover,
  .cta-chip:hover { transform: none; }
}