/* ==========================================================================
   华体会体育主站 — 共享站点样式 /assets/site.css
   主题：夜间球场 × 转播控制台
   1 重置  2 变量  3 基础排版  4 布局  5 通用组件  6 页头  7 页脚
   8 滚动辅助  9 响应式  10 减少动效
   ========================================================================== */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2 变量 ---------- */
:root {
  --pitch: #071E19;
  --pitch-2: #0C2A23;
  --pitch-3: #0A241E;
  --neon: #42F5D1;
  --teal: #1DB89B;
  --ember: #FF5A36;
  --gold: #C9A96A;
  --cream: #F5EEDC;
  --paper: #FFF9ED;
  --ink: #05100D;

  --text: #E4F1EC;
  --text-dim: #9BBCB3;
  --text-soft: #C6DED7;

  --line: rgba(201, 169, 106, 0.3);
  --line-soft: rgba(201, 169, 106, 0.14);
  --neon-line: rgba(66, 245, 209, 0.4);

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", Georgia, "Songti SC", serif;

  --r-xl: 28px;
  --r-lg: 26px;
  --r-md: 18px;
  --r-sm: 12px;
  --r-pill: 999px;

  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 0.22s;
}

/* ---------- 3 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 0.35vw + 14px, 17px);
  line-height: 1.75;
  color: var(--text);
  background-color: var(--pitch);
  background-image:
    radial-gradient(920px 540px at 88% -8%, rgba(66, 245, 209, 0.11), transparent 62%),
    radial-gradient(780px 480px at -10% 18%, rgba(29, 184, 155, 0.12), transparent 66%),
    repeating-linear-gradient(90deg, rgba(201, 169, 106, 0.05) 0 1px, transparent 1px 116px);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5.4vw, 64px); }
h2 { font-size: clamp(25px, 3.1vw, 40px); }
h3 { font-size: clamp(19px, 1.9vw, 26px); }
h4 { font-size: 17px; letter-spacing: 0.02em; }

p { max-width: 68ch; }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--neon);
  outline-offset: 3px;
  border-radius: 8px;
}

.display { font-family: var(--font-display); font-weight: 800; line-height: 1.02; letter-spacing: 0.01em; color: var(--paper); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }
.serif { font-family: var(--font-serif); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
}

/* ---------- 4 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(22px, 3vw, 40px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 26px);
}
.col-aside { grid-column: span 3; }
.col-main { grid-column: span 9; }
.col-half { grid-column: span 6; }

/* ---------- 5 通用组件 ---------- */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.btn--primary {
  background: var(--neon);
  color: var(--ink);
  box-shadow: 0 10px 24px -14px rgba(66, 245, 209, 0.95);
}
.btn--primary:hover { background: #6bffdf; transform: translateY(-2px); }

.btn--ghost {
  background: transparent;
  color: var(--neon);
  border-color: var(--neon-line);
}
.btn--ghost:hover { background: rgba(66, 245, 209, 0.1); transform: translateY(-2px); }

.btn--ember {
  background: var(--ember);
  color: #1B0600;
  box-shadow: 0 10px 24px -14px rgba(255, 90, 54, 0.95);
}
.btn--ember:hover { background: #ff785b; transform: translateY(-2px); }

.btn--paper { background: var(--paper); color: var(--ink); }
.btn--paper:hover { background: #fff; transform: translateY(-2px); }

.btn--sm { padding: 9px 16px; font-size: 13px; }

/* 胶囊标签 */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.5;
  white-space: nowrap;
}
.pill--neon { background: rgba(66, 245, 209, 0.14); color: var(--neon); border-color: var(--neon-line); }
.pill--teal { background: rgba(29, 184, 155, 0.16); color: #71F0D6; border-color: rgba(29, 184, 155, 0.42); }
.pill--ember { background: rgba(255, 90, 54, 0.16); color: #FF9277; border-color: rgba(255, 90, 54, 0.44); }
.pill--gold { background: rgba(201, 169, 106, 0.14); color: var(--gold); border-color: rgba(201, 169, 106, 0.42); }

/* 状态点 */
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(66, 245, 209, 0.18);
  animation: dotBreath 2.6s var(--ease) infinite;
  flex: none;
}
@keyframes dotBreath {
  0%, 100% { box-shadow: 0 0 0 3px rgba(66, 245, 209, 0.18); }
  50% { box-shadow: 0 0 0 7px rgba(66, 245, 209, 0.05); }
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 12px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: rgba(12, 42, 35, 0.82);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}
.status-strip strong { color: var(--neon); font-weight: 600; }

/* 卡片 */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(12, 42, 35, 0.94), rgba(10, 36, 30, 0.86));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon-line);
  box-shadow: 0 26px 50px -34px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(66, 245, 209, 0.12);
}

/* 奶油纸色长文块 */
.paper-block {
  padding: clamp(22px, 3vw, 44px);
  border-radius: var(--r-lg);
  background: var(--cream);
  color: #17231E;
  box-shadow: 0 34px 64px -46px rgba(0, 0, 0, 0.95);
}
.paper-block h2,
.paper-block h3,
.paper-block h4 { color: var(--ink); }
.paper-block a { color: #0B6A58; text-decoration: underline; text-underline-offset: 3px; }
.paper-block a:hover { color: #084C40; }
.paper-block strong { color: var(--ink); }

/* 正文排版 */
.prose { max-width: 72ch; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.8em; font-size: clamp(22px, 2.4vw, 30px); }
.prose h3 { margin-top: 1.5em; }
.prose ul,
.prose ol { padding-left: 1.35em; }
.prose ul { list-style: none; padding-left: 0; }
.prose ul > li { position: relative; padding-left: 20px; }
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--neon);
}
.prose li + li { margin-top: 0.45em; }
.prose a { color: var(--neon); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote {
  padding: 16px 22px;
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(12, 42, 35, 0.7);
  font-family: var(--font-serif);
  color: var(--text-soft);
}

/* 面包屑 */
.breadcrumb { padding-top: 14px; }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after { content: "/"; color: rgba(201, 169, 106, 0.6); }
.breadcrumb a { color: var(--text-dim); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--neon); }
.breadcrumb [aria-current="page"] { color: var(--neon); }

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(10, 36, 30, 0.7);
  -webkit-overflow-scrolling: touch;
}
.data-table { min-width: 520px; font-size: 14.5px; }
.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(5, 16, 13, 0.55);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(201, 169, 106, 0.1);
  vertical-align: top;
}
.data-table tbody tr { transition: background-color var(--dur) var(--ease); }
.data-table tbody tr:hover { background: rgba(66, 245, 209, 0.07); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* 图片容器（页面阶段放置占位图） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background-color: var(--pitch-2);
  background-image:
    radial-gradient(120% 90% at 82% 0%, rgba(66, 245, 209, 0.18), transparent 62%),
    linear-gradient(160deg, #0C2A23, #071E19 72%);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: 0.4;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 169, 106, 0.18) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(201, 169, 106, 0.18) 0 1px, transparent 1px 64px);
}
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 1;
  padding: 5px 12px;
  border: 1px solid var(--neon-line);
  border-radius: var(--r-pill);
  background: rgba(5, 16, 13, 0.74);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--neon);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 6 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(7, 30, 25, 0.97) 62%, rgba(7, 30, 25, 0.88));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 12px;
  z-index: 5;
  padding: 9px 18px;
  border-radius: var(--r-pill);
  background: var(--neon);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-260%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.hud {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(5, 16, 13, 0.52);
}
.hud__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.hud__status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: none;
  color: var(--text-soft);
}
.hud__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--neon);
  border-bottom: 1px dashed rgba(66, 245, 209, 0.42);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.hud__link:hover { color: #8DFFE8; border-color: #8DFFE8; }
.hud__arrow { transition: transform var(--dur) var(--ease); }
.hud__link:hover .hud__arrow { transform: translateX(3px); }

.header-bar { padding-top: 12px; }

.nav-shell {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 10px 8px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, rgba(12, 42, 35, 0.96), rgba(10, 36, 30, 0.92));
  box-shadow: 0 18px 40px -30px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: padding var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.site-header.is-scrolled .nav-shell {
  padding-block: 5px;
  border-color: rgba(66, 245, 209, 0.28);
  box-shadow: 0 24px 46px -28px rgba(0, 0, 0, 1), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--paper);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 12px;
  background: conic-gradient(from 210deg, var(--neon), var(--teal) 46%, var(--gold) 72%, var(--neon));
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  box-shadow: inset 0 0 0 1px rgba(5, 16, 13, 0.3);
}
.brand__text { display: block; }
.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.brand__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: var(--text-dim);
}

.nav { display: flex; align-items: center; margin-inline: auto; }
.nav-list { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; }
.nav-list a {
  display: inline-block;
  padding: 8px 13px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-soft);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-list a:hover { color: var(--neon); background: rgba(66, 245, 209, 0.09); }
.nav-list a[aria-current="page"] {
  background: var(--neon);
  color: var(--ink);
  font-weight: 700;
  box-shadow: 0 8px 20px -12px rgba(66, 245, 209, 0.95);
}

.nav-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--neon-line);
  border-radius: var(--r-pill);
  background: rgba(66, 245, 209, 0.1);
  color: var(--neon);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: rgba(66, 245, 209, 0.18); }
.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}
.nav-toggle__bars { position: relative; display: block; width: 16px; height: 10px; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 8px; }
.nav-shell[data-open="true"] .nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.nav-shell[data-open="true"] .nav-toggle__bars::after { top: 4px; transform: rotate(-45deg); }

/* ---------- 7 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  padding-block: clamp(36px, 5vw, 68px) 30px;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(760px 320px at 12% 108%, rgba(66, 245, 209, 0.14), transparent 68%),
    linear-gradient(180deg, rgba(10, 36, 30, 0.55), rgba(7, 30, 25, 1) 55%);
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 180px;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 169, 106, 0.14) 0 1px, transparent 1px 88px);
  mask-image: linear-gradient(180deg, transparent, #000 65%);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 65%);
}
.site-footer > .wrap { position: relative; z-index: 1; }

.footer-top {
  display: grid;
  grid-template-columns: minmax(280px, 1.05fr) 1.55fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.footer-brand { max-width: 420px; }
.footer-wordmark {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: clamp(34px, 5.4vw, 62px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: 0.01em;
  color: var(--paper);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .footer-wordmark {
    background-image: linear-gradient(100deg, var(--paper) 34%, var(--neon));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.footer-summary {
  margin-bottom: 18px;
  font-size: 15px;
  color: var(--text-dim);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.4vw, 32px);
}
.footer-heading {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-col ul { display: grid; gap: 2px; }
.footer-col a {
  display: inline-block;
  padding-block: 5px;
  font-size: 15px;
  color: var(--text-soft);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-col a:hover { color: var(--neon); transform: translateX(3px); }

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px 30px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}
.contact-line { display: flex; flex-direction: column; gap: 3px; max-width: none; }
.contact-line__key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}
.contact-line__val { font-size: 14.5px; line-height: 1.6; color: var(--text-soft); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(24px, 3vw, 38px);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-dim);
}
.footer-legal { max-width: none; }
.footer-legal .mono { color: var(--gold); letter-spacing: 0.04em; }
.footer-hint {
  order: 3;
  flex-basis: 100%;
  max-width: 62ch;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: rgba(155, 188, 179, 0.78);
}
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.footer-legal-links a {
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-legal-links a:hover { color: var(--neon); border-color: var(--neon-line); }

/* ---------- 8 滚动辅助 ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--neon) 62%, var(--ember));
  box-shadow: 0 0 12px rgba(66, 245, 209, 0.6);
  transition: width 0.12s linear;
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 95;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--neon-line);
  border-radius: 50%;
  background: rgba(12, 42, 35, 0.94);
  color: var(--neon);
  font-size: 17px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  box-shadow: 0 18px 34px -22px rgba(0, 0, 0, 0.95);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease), background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--neon); color: var(--ink); }

/* ---------- 9 响应式 ---------- */
@media (max-width: 1180px) {
  .brand__tag { display: none; }
}

@media (max-width: 1024px) {
  .nav-list a { padding: 8px 10px; font-size: 13.5px; }
  .nav-shell { gap: 10px; padding-left: 14px; }
}

@media (max-width: 960px) {
  .nav-shell {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--r-xl);
  }
  .site-header.is-scrolled .nav-shell { padding-block: 8px; }

  .nav-top { flex: 1 1 100%; justify-content: space-between; }
  .nav-toggle { display: inline-flex; }

  .nav {
    flex: 1 1 100%;
    width: 100%;
    margin-inline: 0;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding-top: 8px;
    border-top: 1px solid var(--line-soft);
  }
  .nav-list a { display: block; padding: 12px 14px; border-radius: 16px; font-size: 15px; }

  .nav-actions {
    flex: 1 1 100%;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }
  .nav-actions .btn { width: 100%; }

  .nav-shell[data-open="true"] .nav { max-height: 520px; opacity: 1; visibility: visible; pointer-events: auto; }
  .nav-shell[data-open="true"] .nav-actions { max-height: 140px; opacity: 1; visibility: visible; pointer-events: auto; padding-top: 4px; }

  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { max-width: none; }
  .col-aside,
  .col-main,
  .col-half { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom { align-items: flex-start; }
  .status-strip { border-radius: var(--r-md); }
}

@media (max-width: 560px) {
  .hud__status { display: none; }
  .hud__inner { justify-content: flex-end; }
  .brand__name { font-size: 17px; }
  .brand__mark { width: 32px; height: 32px; border-radius: 10px; font-size: 10px; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-legal-links { gap: 4px 14px; }
  .data-table { min-width: 440px; }
}

/* ---------- 10 减少动效 ---------- */
@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;
  }
  .dot { animation: none; }
}