/* ========================================================
   M6娱乐汇 · 共享样式表 /assets/site.css
   外壳（命令栏 + 页脚）、通用组件、网格、动效与无障碍
   ======================================================== */

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

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

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

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

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

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

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

/* ---------- 2. TOKENS ---------- */
:root {
  --space: #0A1230;
  --void: #050A1E;
  --panel: #121C46;
  --neon: #8B5CF6;
  --cyan: #22D3EE;
  --amber: #FF8A3D;
  --ok: #34E2A0;
  --ink: #E6EAF5;
  --muted: #9AA6C8;
  --line: rgba(255, 255, 255, 0.22);
  --line-soft: rgba(255, 255, 255, 0.10);
  --shadow-hard: 10px 10px 0 rgba(5, 10, 30, 0.85);
  --shadow-soft: 6px 6px 0 rgba(5, 10, 30, 0.80);

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

  --wrap: 1360px;
  --pad: clamp(16px, 3vw, 32px);
}

/* ---------- 3. BASE ---------- */
body {
  min-height: 100vh;
  background-color: var(--space);
  background-image:
    radial-gradient(1100px 620px at 84% -10%, rgba(139, 92, 246, 0.24), transparent 62%),
    radial-gradient(900px 560px at 3% 106%, rgba(34, 211, 238, 0.16), transparent 64%),
    repeating-linear-gradient(180deg, rgba(230, 234, 245, 0.035) 0 1px, transparent 1px 8px);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.8;
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: linear-gradient(120deg, transparent 42%, rgba(34, 211, 238, 0.05) 62%, transparent 78%);
}

::selection { background: var(--neon); color: #FFFFFF; }

#main-content { display: block; scroll-margin-top: 88px; }

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

.sr-only,
.skip-link:not(:focus):not(:active) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 11px 18px;
  background: var(--amber);
  color: #20100A;
  font: 700 13px/1 var(--font-mono);
  letter-spacing: 0.06em;
  border: 2px solid #FFFFFF;
  box-shadow: 4px 4px 0 rgba(5, 10, 30, 0.85);
}

/* ---------- 4. 通用排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--ink);
}

strong, b { color: #FFFFFF; font-weight: 700; }

code, kbd, samp { font-family: var(--font-mono); font-size: 0.94em; color: var(--cyan); }

.rule {
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, var(--line), transparent 88%);
}

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--ok);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(52, 226, 160, 0.18);
  vertical-align: middle;
  margin-right: 8px;
}

/* ---------- 5. 布局骨架 ---------- */
.shell { width: 100%; }

.sec {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(48px, 6vw, 84px) var(--pad) 0;
}

.sec--tight { padding-top: clamp(26px, 4vw, 44px); }

.sec__head {
  display: grid;
  gap: 12px;
  max-width: 860px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.sec__num {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.sec__title {
  font-size: clamp(28px, 3.6vw, 40px);
  text-transform: none;
}

.sec__lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.split { display: grid; gap: clamp(24px, 3vw, 40px); }
.split--5-7 { grid-template-columns: 5fr 7fr; }
.split--7-5 { grid-template-columns: 7fr 5fr; }
.split--4-8 { grid-template-columns: 4fr 8fr; }

.ladder { display: grid; gap: clamp(20px, 3vw, 32px); }
.ladder > *:nth-child(odd) { margin-right: clamp(0px, 4vw, 72px); }
.ladder > *:nth-child(even) { margin-left: clamp(0px, 4vw, 72px); }

/* ---------- 6. 面板与数据块 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(22px, 3vw, 38px);
}

.panel--neon { border-left: 6px solid var(--neon); }
.panel--cyan { border-left: 6px solid var(--cyan); }
.panel--amber { border-left: 6px solid var(--amber); }
.panel--flush { padding: 0; }

.kpi {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.kpi__num {
  font: 700 30px/1 var(--font-mono);
  letter-spacing: -0.02em;
  color: var(--amber);
}

.kpi__label {
  font: 500 12px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.12em;
  border: 2px solid currentColor;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
}

.tag--neon { color: var(--neon); background: rgba(139, 92, 246, 0.10); }
.tag--cyan { color: var(--cyan); background: rgba(34, 211, 238, 0.08); }
.tag--amber { color: var(--amber); background: rgba(255, 138, 61, 0.10); }
.tag--ok { color: var(--ok); background: rgba(52, 226, 160, 0.10); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 17px;
  font: 600 13px/1 var(--font-mono);
  letter-spacing: 0.1em;
  border: 2px solid var(--line);
  box-shadow: 4px 4px 0 rgba(5, 10, 30, 0.9);
  transition: transform 0.16s ease, box-shadow 0.16s ease,
    border-color 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(5, 10, 30, 0.9);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(5, 10, 30, 0.9);
}

.btn--amber { background: var(--amber); color: #20100A; border-color: rgba(255, 255, 255, 0.4); }
.btn--cyan { background: var(--cyan); color: #04202A; border-color: rgba(255, 255, 255, 0.4); }
.btn--neon { background: var(--neon); color: #12082A; border-color: rgba(255, 255, 255, 0.4); }
.btn--ghost { background: rgba(18, 28, 70, 0.78); color: var(--ink); }
.btn--sm { padding: 8px 12px; font-size: 12px; }
.btn--block { width: 100%; }

/* ---------- 8. 顶部命令栏 ---------- */
.cmd {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10, 18, 48, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--line);
}

.cmd::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--cyan) 48%, rgba(34, 211, 238, 0) 94%);
  pointer-events: none;
}

.cmd__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  height: 64px;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand__mark {
  font: 800 15px/1 var(--font-mono);
  letter-spacing: 0.04em;
  padding: 9px 10px;
  color: var(--void);
  background: linear-gradient(135deg, var(--cyan), var(--neon));
  border: 2px solid var(--line);
  box-shadow: 3px 3px 0 rgba(5, 10, 30, 0.85);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.brand__ver {
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.45);
  padding: 5px 6px;
}

.cmd__nav { display: flex; min-width: 0; }

.cmd__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.cmd__link {
  display: block;
  padding: 9px 11px;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--muted);
  border: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.cmd__link:hover {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(18, 28, 70, 0.7);
}

.cmd__link[aria-current="page"] {
  color: #FFFFFF;
  border-color: rgba(139, 92, 246, 0.75);
  background: rgba(139, 92, 246, 0.18);
  box-shadow: inset 0 -2px 0 0 var(--neon), 0 0 16px rgba(139, 92, 246, 0.28);
}

.cmd__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.cmd__probe {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background: rgba(18, 28, 70, 0.75);
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--ink);
  transition: border-color 0.16s ease, color 0.16s ease, background-color 0.16s ease;
}

.cmd__probe:hover { border-color: var(--cyan); color: var(--cyan); }

.cmd__probe[aria-expanded="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.16);
}

.cmd__probe-glyph {
  position: relative;
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.cmd__probe-glyph::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -4px;
  width: 7px;
  height: 2px;
  background: currentColor;
  transform: rotate(45deg);
}

.cmd__toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 2px solid var(--line);
  background: rgba(18, 28, 70, 0.75);
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--ink);
}

.cmd__toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.16);
}

.cmd__toggle-bars {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 2px;
  background: currentColor;
}

.cmd__toggle-bars::before,
.cmd__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
}

.cmd__toggle-bars::before { top: -5px; }
.cmd__toggle-bars::after { top: 5px; }

.cmd__meter {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
  pointer-events: none;
  z-index: 2;
}

/* ---------- 9. 路径索引浮层 ---------- */
.idx {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 2px);
  z-index: 5;
  background: var(--void);
  border-bottom: 2px solid var(--line);
  border-top: 2px solid var(--line-soft);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
}

.idx[hidden] { display: none; }

.idx__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px var(--pad) 24px;
}

.idx__label {
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 14px;
}

.idx__list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.idx__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px;
  border: 2px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.4;
  color: var(--ink);
  transition: border-color 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.idx__link:hover {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.10);
  color: #FFFFFF;
}

.idx__num {
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.idx__meta {
  margin-top: 14px;
  font: 400 12px/1.7 var(--font-mono);
  color: var(--muted);
}

/* ---------- 10. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(64px, 9vw, 120px);
  background: var(--void);
  border-top: 2px solid var(--line);
  overflow: hidden;
}

.site-foot::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--cyan) 44%, transparent 92%);
  pointer-events: none;
}

.site-foot__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 280px at 10% -20%, rgba(139, 92, 246, 0.30), transparent 70%),
    radial-gradient(620px 260px at 88% 8%, rgba(34, 211, 238, 0.18), transparent 72%),
    repeating-linear-gradient(0deg, rgba(230, 234, 245, 0.045) 0 1px, transparent 1px 8px);
}

.foot__inner {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) var(--pad) 28px;
}

.foot__brand {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--line-soft);
}

.brand--foot .brand__mark { padding: 8px 9px; }
.brand--foot .brand__name { font-size: 19px; }

.foot__tag {
  font: 500 12px/1.7 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.foot__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1.25fr 1fr;
  gap: 32px 28px;
  padding: 34px 0 30px;
}

.foot__col { min-width: 0; }

.foot__title {
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 14px;
}

.foot__list {
  display: grid;
  gap: 9px;
  list-style: none;
}

.foot__link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.foot__link:hover {
  color: var(--ink);
  border-bottom-color: var(--cyan);
}

.foot__mono {
  display: block;
  font: 500 13px/1.7 var(--font-mono);
  color: var(--ink);
  margin-bottom: 6px;
  word-break: break-all;
}

.foot__text {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 10px;
  word-break: break-word;
}

.foot__base {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  border-top: 2px solid var(--line-soft);
}

.foot__copy {
  font: 400 12px/1.7 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 11. 面包屑与长文 ---------- */
.crumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px var(--pad) 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font: 500 11px/1.7 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.crumb a { color: var(--muted); border-bottom: 1px solid transparent; }
.crumb a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.crumb__sep { color: rgba(255, 255, 255, 0.35); }

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink);
}

.prose p + p { margin-top: 1em; }

.prose ul,
.prose ol {
  display: grid;
  gap: 8px;
  margin: 1.1em 0;
  list-style: none;
}

.prose li {
  position: relative;
  padding-left: 20px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9em;
  width: 9px;
  height: 2px;
  background: var(--cyan);
}

.prose h2 { font-size: 24px; margin: 1.6em 0 0.6em; }
.prose h3 { font-size: 19px; margin: 1.4em 0 0.5em; }

/* ---------- 12. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
  background:
    linear-gradient(135deg, #0D1638 0%, #1A1450 52%, #0B2036 100%);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.16), transparent 46%, rgba(34, 211, 238, 0.14)),
    repeating-linear-gradient(0deg, rgba(230, 234, 245, 0.05) 0 1px, transparent 1px 6px);
}

.media > img,
.media > svg,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

@supports not (aspect-ratio: 1 / 1) {
  .media--16x9 { min-height: 240px; }
  .media--4x3 { min-height: 220px; }
  .media--1x1 { min-height: 260px; }
  .media--tall { min-height: 340px; }
}

/* ---------- 13. 筛选条 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.filter-btn {
  padding: 9px 13px;
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--muted);
  border: 2px solid var(--line-soft);
  background: transparent;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.filter-btn:hover {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(18, 28, 70, 0.7);
}

.filter-btn[aria-pressed="true"] {
  color: #04202A;
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 3px 3px 0 rgba(5, 10, 30, 0.85);
}

[data-filter-item][hidden] { display: none; }

/* ---------- 14. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.22s ease-out, transform 0.22s ease-out;
  will-change: opacity, transform;
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .cmd__link { padding: 9px 8px; letter-spacing: 0.10em; }
  .cmd__list { gap: 0; }
}

@media (max-width: 1024px) {
  .cmd__toggle { display: inline-flex; }

  .cmd__nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 2px);
    display: none;
    z-index: 6;
    background: var(--void);
    border-top: 2px solid var(--line-soft);
    border-bottom: 2px solid var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    max-height: calc(100vh - 66px);
    overflow-y: auto;
  }

  .cmd__nav[data-open] { display: block; }

  .cmd__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
  }

  .cmd__link {
    padding: 15px 12px;
    font-size: 13px;
    border-bottom: 1px solid var(--line-soft);
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    border-top: 2px solid transparent;
  }

  .cmd__link[aria-current="page"] { box-shadow: inset 3px 0 0 0 var(--neon); }

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

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

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .split--5-7,
  .split--7-5,
  .split--4-8 { grid-template-columns: 1fr; }

  .ladder > *:nth-child(odd),
  .ladder > *:nth-child(even) { margin-left: 0; margin-right: 0; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .cmd__inner {
    height: auto;
    min-height: 60px;
    padding: 10px var(--pad);
    gap: 10px;
    flex-wrap: wrap;
  }

  .cmd__actions { gap: 8px; }

  .btn--sm { padding: 8px 10px; font-size: 11.5px; letter-spacing: 0.06em; }

  .cmd__toggle-label { display: none; }

  .idx__list { grid-template-columns: 1fr; }

  .foot__grid { grid-template-columns: 1fr; gap: 28px; }

  .foot__base { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (max-width: 420px) {
  .brand__ver { display: none; }

  .cmd__probe span:last-child { display: none; }

  .cmd__probe { padding: 9px 10px; }
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .btn:hover { transform: none; }
}