/* ==========================================================================
   IM电竞娱乐 · /assets/site.css
   共享层：reset / 变量与城市坐标色系 / 中文排版 / 命令栏页头 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

button { background: none; border: 0; }

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

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

/* ---------- 变量 ---------- */
:root {
  --ink: #05070C;
  --ink-2: #0B1220;
  --grid: #1B2A44;
  --line: #243654;
  --dim: #54697F;

  --cyan: #22E3D3;
  --purple: #8B5CFF;
  --orange: #FF7A2F;
  --green: #35D07F;
  --white: #E8F1F5;
  --gray: #8A9BB0;
  --red: #FF4D6D;

  --accent: var(--cyan);
  --accent-ink: #04201E;
  --accent-soft: rgba(34, 227, 211, .12);
  --accent-line: rgba(34, 227, 211, .4);
  --accent-glow: rgba(34, 227, 211, .10);

  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius: 2px;
  --wrap: 1440px;
  --gutter: clamp(16px, 3vw, 40px);
  --bar-h: 66px;

  --shadow-card: 0 22px 56px rgba(0, 0, 0, .58);
}

html[data-city="shanghai"] {
  --accent: var(--cyan);
  --accent-ink: #04201E;
  --accent-soft: rgba(34, 227, 211, .12);
  --accent-line: rgba(34, 227, 211, .40);
  --accent-glow: rgba(34, 227, 211, .10);
}

html[data-city="chengdu"] {
  --accent: var(--orange);
  --accent-ink: #2A0F02;
  --accent-soft: rgba(255, 122, 47, .12);
  --accent-line: rgba(255, 122, 47, .42);
  --accent-glow: rgba(255, 122, 47, .10);
}

html[data-city="beijing"] {
  --accent: var(--purple);
  --accent-ink: #12062B;
  --accent-soft: rgba(139, 92, 255, .14);
  --accent-line: rgba(139, 92, 255, .46);
  --accent-glow: rgba(139, 92, 255, .12);
}

html[data-city="guangzhou"] {
  --accent: var(--green);
  --accent-ink: #04220F;
  --accent-soft: rgba(53, 208, 127, .12);
  --accent-line: rgba(53, 208, 127, .42);
  --accent-glow: rgba(53, 208, 127, .10);
}

/* ---------- 底板：深空黑 + 蓝图网格 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 68% at 50% -18%, var(--accent-glow), transparent 62%),
    linear-gradient(to right, rgba(27, 42, 68, .50) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 42, 68, .50) 1px, transparent 1px);
  background-size: auto, 96px 96px, 96px 96px;
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
}

/* 扫描线质感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
  opacity: .05;
  background-image: repeating-linear-gradient(to bottom, rgba(232, 241, 245, .5) 0 1px, transparent 1px 4px);
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--bar-h) + 12px);
}

/* ---------- 中文排版与基础元素 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.012em;
}

h1 { font-size: clamp(30px, 4.6vw, 60px); }
h2 { font-size: clamp(24px, 3vw, 40px); }
h3 { font-size: clamp(18px, 1.8vw, 24px); }

p { line-height: 1.75; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -72px;
  z-index: 400;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top .2s ease;
}

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

/* ==========================================================================
   命令栏页头
   ========================================================================== */
.cmd-bar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(5, 7, 12, .97), rgba(5, 7, 12, .84));
  border-bottom: 1px solid var(--grid);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.cmd-bar__grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(14px, 2vw, 34px);
  width: min(var(--wrap), 100%);
  margin: 0 auto;
  padding: 15px var(--gutter);
  transition: padding .28s ease;
}

.cmd-bar[data-stuck] .cmd-bar__grid {
  padding-top: 8px;
  padding-bottom: 8px;
}

.cmd-bar__brand {
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border: 1px solid var(--accent);
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .02em;
  white-space: nowrap;
}

.brand__meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--gray);
  white-space: nowrap;
  transition: opacity .22s ease;
}

.cmd-bar[data-stuck] .brand__meta {
  opacity: .45;
}

/* 主导航 */
.cmd-nav {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.cmd-nav__title {
  display: none;
}

.cmd-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: clamp(2px, .7vw, 12px);
}

.cmd-nav__item {
  display: flex;
}

.cmd-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 11px 6px;
  font-size: clamp(12.5px, .85vw, 14px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--gray);
  white-space: nowrap;
  transition: color .2s ease;
}

.cmd-nav__link::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 2px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .26s ease;
}

.cmd-nav__link:hover {
  color: var(--white);
}

.cmd-nav__link:hover::after {
  transform: scaleX(.4);
}

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

.cmd-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.cmd-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--dim);
}

.cmd-nav__link[aria-current="page"] .cmd-nav__idx {
  color: var(--accent);
}

.cmd-nav__drawer {
  display: none;
}

/* 右侧工具区 */
.cmd-bar__tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
}

.city-axis {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--grid);
  background: rgba(11, 18, 32, .72);
}

.city-axis__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 9px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--gray);
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease;
}

.city-axis__btn:hover {
  background: rgba(232, 241, 245, .06);
  color: var(--white);
}

.city-axis__dot {
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--dim);
}

.city-axis__btn[data-city="shanghai"] .city-axis__dot { background: var(--cyan); }
.city-axis__btn[data-city="chengdu"] .city-axis__dot { background: var(--orange); }
.city-axis__btn[data-city="beijing"] .city-axis__dot { background: var(--purple); }
.city-axis__btn[data-city="guangzhou"] .city-axis__dot { background: var(--green); }

.city-axis__btn[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--white);
}

.city-axis__btn[aria-pressed="true"] .city-axis__dot {
  box-shadow: 0 0 10px currentColor;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  padding: 9px 12px;
  border: 1px solid var(--grid);
  background: rgba(11, 18, 32, .82);
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.icon-btn:hover {
  color: var(--white);
  border-color: var(--accent-line);
}

.icon-btn[aria-expanded="true"] {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--grid);
  background: rgba(11, 18, 32, .82);
  color: var(--white);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease;
}

.nav-toggle:hover {
  border-color: var(--accent-line);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
  flex: none;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--accent);
  transition: transform .24s ease;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-4px) rotate(-45deg);
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
}

/* 阅读进度 */
.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(27, 42, 68, .9);
  overflow: hidden;
}

.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--accent), rgba(232, 241, 245, .55));
  transition: transform .12s linear;
}

/* 索引面板 */
.cmd-index {
  position: absolute;
  top: 100%;
  right: var(--gutter);
  z-index: 3;
  width: min(460px, calc(100vw - 32px));
  padding: 16px 0 6px;
  border: 1px solid var(--grid);
  border-top: 2px solid var(--accent);
  background: linear-gradient(180deg, rgba(11, 18, 32, .99), rgba(5, 7, 12, .99));
  box-shadow: var(--shadow-card);
}

.cmd-index[hidden] {
  display: none;
}

.cmd-index__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 0 18px 12px;
  border-bottom: 1px solid var(--grid);
}

.cmd-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--accent);
}

.cmd-index__hint {
  font-size: 12px;
  color: var(--gray);
}

.cmd-index__list {
  padding: 8px 0;
}

.cmd-index__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  font-size: 14px;
  color: var(--gray);
  transition: background .18s ease, color .18s ease;
}

.cmd-index__link:hover,
.cmd-index__link:focus-visible {
  background: var(--accent-soft);
  color: var(--white);
}

.cmd-index__idx {
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
}

.cmd-index__label {
  font-weight: 600;
  letter-spacing: .02em;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-foot {
  position: relative;
  margin-top: clamp(64px, 8vw, 128px);
  border-top: 1px solid var(--grid);
  background: linear-gradient(180deg, rgba(11, 18, 32, .78), rgba(5, 7, 12, 1) 60%);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(420px, 48%);
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.site-foot::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(280px, 32%);
  height: 1px;
  background: linear-gradient(270deg, var(--accent-line), transparent);
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(24px, 3vw, 56px);
  width: min(var(--wrap), 100%);
  margin: 0 auto;
  padding: clamp(42px, 5vw, 76px) var(--gutter) 0;
}

.foot-brand__name {
  font-family: var(--font-display);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.foot-brand__line {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--accent);
}

.foot-brand__note {
  margin-top: 16px;
  max-width: 38ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--gray);
}

.foot-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--gray);
}

.foot-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.foot-list__item {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 14px;
  color: var(--gray);
}

.foot-list__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--dim);
}

.foot-list__text {
  color: var(--gray);
}

.foot-list__link {
  position: relative;
  color: var(--gray);
  transition: color .2s ease, padding-left .2s ease;
}

.foot-list__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width .2s ease;
}

.foot-list__link:hover {
  color: var(--white);
  padding-left: 14px;
}

.foot-list__link:hover::before {
  width: 10px;
}

.city-axis--foot {
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  border: 0;
  background: none;
}

.city-axis--foot .city-axis__btn {
  padding: 7px 12px;
  border: 1px solid var(--grid);
  font-size: 12.5px;
}

.city-axis--foot .city-axis__btn[aria-pressed="true"] {
  border-color: var(--accent-line);
}

.season-strip {
  width: min(var(--wrap), 100%);
  margin: 0 auto;
  padding: clamp(28px, 3.2vw, 48px) var(--gutter) 0;
  border-top: 1px solid var(--grid);
}

.season-strip__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--dim);
}

.season-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.season-strip__item {
  padding: 5px 9px;
  border: 1px solid var(--grid);
  background: rgba(11, 18, 32, .55);
  font-size: 11.5px;
  color: var(--dim);
}

.season-strip__item.is-current {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
}

.foot-contact {
  width: min(var(--wrap), 100%);
  margin: 0 auto;
  padding: clamp(28px, 3.2vw, 46px) var(--gutter) 0;
}

.foot-contact__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px 32px;
  padding-top: clamp(20px, 2.4vw, 32px);
  border-top: 1px solid var(--grid);
}

.foot-contact__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.foot-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--dim);
}

.foot-contact__value {
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  width: min(var(--wrap), 100%);
  margin: clamp(28px, 3.2vw, 46px) auto 0;
  padding: clamp(20px, 2.4vw, 28px) var(--gutter) clamp(30px, 3.4vw, 48px);
  border-top: 1px solid var(--grid);
}

.foot-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.foot-legal__link {
  font-size: 13px;
  color: var(--gray);
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.foot-legal__link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent-line);
}

.foot-legal__icp {
  font-size: 12px;
  color: var(--gray);
}

.foot-legal__copy {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--dim);
}

/* ==========================================================================
   通用组件
   ========================================================================== */
.wrap {
  width: min(var(--wrap), 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(56px, 7vw, 110px);
}

.section + .section {
  border-top: 1px solid rgba(27, 42, 68, .55);
}

[data-section].is-current .section-head__idx {
  color: var(--accent);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px 22px;
  margin-bottom: clamp(24px, 3vw, 44px);
}

.section-head__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--dim);
  transition: color .25s ease;
}

.section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 800;
  
}

.section-head__note {
  max-width: 46ch;
  font-size: 13.5px;
  color: var(--gray);
}

.section-head__rule {
  flex: 1 1 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--grid), transparent);
}

.breadcrumbs {
  padding-block: 18px;
  border-bottom: 1px solid rgba(27, 42, 68, .6);
  font-size: 12.5px;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray);
}

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

.breadcrumbs__link {
  color: var(--gray);
  transition: color .2s ease;
}

.breadcrumbs__link:hover {
  color: var(--accent);
}

.breadcrumbs__sep {
  color: var(--dim);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: transparent;
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.btn--primary:hover {
  box-shadow: 0 14px 34px -14px var(--accent);
}

.btn--ghost {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
}

.btn--quiet {
  border-color: transparent;
  padding-inline: 4px;
  color: var(--gray);
}

.btn--quiet:hover {
  transform: none;
  color: var(--white);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

.panel {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(11, 18, 32, .92), rgba(5, 7, 12, .92));
}

.panel--accent {
  border-color: var(--accent-line);
  box-shadow: inset 0 0 0 1px var(--accent-soft);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--grid);
}

.panel__title {
  font-size: 16px;
  font-weight: 700;
}

.panel__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gray);
}

.panel__body {
  font-size: 14.5px;
  color: var(--gray);
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.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)); }

.metric {
  padding: 18px 20px;
  border: 1px solid var(--grid);
  background: rgba(11, 18, 32, .7);
}

.metric__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gray);
}

.metric__value {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.metric__unit {
  margin-left: 6px;
  font-size: 12px;
  color: var(--accent);
}

.metric__foot {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--gray);
}

.media {
  position: relative;
  margin: 0;
  border: 1px solid var(--grid);
  background: var(--ink-2);
  overflow: hidden;
}

.media__frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--ink-2);
  background-image:
    repeating-linear-gradient(45deg, rgba(27, 42, 68, .65) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(-45deg, rgba(27, 42, 68, .38) 0 1px, transparent 1px 16px);
}

.media__frame--tall { aspect-ratio: 3 / 4; }
.media__frame--square { aspect-ratio: 1 / 1; }
.media__frame--wide { aspect-ratio: 21 / 9; }

.media__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding: 10px 14px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--gray);
}

.lead {
  max-width: 62ch;
  font-size: clamp(16px, 1.3vw, 18.5px);
  line-height: 1.8;
  color: var(--white);
}

.prose {
  max-width: 74ch;
  color: var(--gray);
}

.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--white); }
.prose h2,
.prose h3 {
  margin: 1.6em 0 .6em;
  color: var(--white);
}
.prose a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-line);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--grid), transparent);
}

.note-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: var(--dim);
}

/* 显现与返回顶部 */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}

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

.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(14px, 2.4vw, 32px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--accent-line);
  background: rgba(5, 7, 12, .92);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .24s ease, transform .24s ease, visibility .24s ease, background .2s ease;
}

.to-top[data-show] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--accent-soft);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1180px) {
  .cmd-bar__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
  }

  .cmd-bar__brand { grid-column: 1; }
  .cmd-bar__tools { grid-column: 2; }

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

  .cmd-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 18px;
    padding: calc(var(--bar-h) + 26px) var(--gutter) 40px;
    background: rgba(4, 6, 11, .985);
    border-top: 1px solid var(--grid);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s ease, transform .26s ease, visibility .26s ease;
  }

  .cmd-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .cmd-nav__title {
    display: block;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--grid);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .3em;
    color: var(--dim);
  }

  .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .cmd-nav__item { display: block; }

  .cmd-nav__link {
    display: flex;
    align-items: baseline;
    padding: 16px 0;
    border-bottom: 1px solid rgba(27, 42, 68, .7);
    font-size: clamp(18px, 3.4vw, 22px);
    font-weight: 700;
    color: var(--white);
  }

  .cmd-nav__link::after {
    left: 0;
    right: auto;
    bottom: -1px;
    width: 56px;
  }

  .cmd-nav__link:hover::after { transform: scaleX(1); }

  .cmd-nav__idx { font-size: 11px; }

  .cmd-nav__drawer {
    display: block;
    margin-top: auto;
    padding-top: 22px;
  }

  .city-axis--drawer {
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    border: 0;
    background: none;
  }

  .city-axis--drawer .city-axis__btn {
    padding: 10px 16px;
    border: 1px solid var(--grid);
    font-size: 13px;
  }

  .city-axis--drawer .city-axis__btn[aria-pressed="true"] {
    border-color: var(--accent-line);
  }
}

@media (max-width: 1080px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .cmd-bar__tools > .city-axis { display: none; }
  .brand__mark { width: 34px; height: 34px; font-size: 12px; }
  .brand__meta { font-size: 10px; letter-spacing: .1em; }
  .cmd-index { right: 8px; left: 8px; width: auto; }
  .foot-legal__copy { margin-left: 0; }
}

@media (max-width: 640px) {
  .foot-grid { grid-template-columns: minmax(0, 1fr); }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .section-head__rule { display: none; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- 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;
    scroll-behavior: auto !important;
  }

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