/* ==========================================================================
   亚博赛场 · 共享外壳样式 /assets/site.css
   夜间赛场指挥中心：深墨蓝底、堆叠面板、等宽数据、克制动效
   ========================================================================== */

/* ---------- 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, blockquote, dl, dd { margin: 0; }

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

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

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

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

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

details > summary { list-style: none; }

/* ---------- 2. 变量 ---------- */
:root {
  --c-void: #050B18;
  --c-panel: #0C1730;
  --c-lift: #142A4A;
  --c-line: #2A3B5C;
  --c-text: #E8EFFA;
  --c-sub: #C7D5EA;
  --c-muted: #8EA3C2;
  --c-std: #25E3D4;
  --c-beta: #FF7A1A;
  --c-focus: #4DD0FF;
  --c-ok: #3DD68C;

  --wrap: 1280px;
  --gut: 24px;
  --r-panel: 26px;
  --r-card: 18px;
  --r-sm: 10px;

  --font-display: "Barlow Condensed", "Oswald", "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --t-fast: 160ms;
  --t-slide: 200ms;
}

@media (min-width: 768px) { :root { --gut: 40px; } }
@media (min-width: 1024px) { :root { --gut: 64px; } }

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-void);
  background-image:
    radial-gradient(900px 620px at 10% -10%, rgba(37, 227, 212, 0.10), transparent 62%),
    radial-gradient(780px 540px at 94% 4%, rgba(77, 208, 255, 0.08), transparent 64%),
    radial-gradient(920px 620px at 48% 106%, rgba(255, 122, 26, 0.06), transparent 64%);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

h1 { font-size: clamp(44px, 7vw, 96px); letter-spacing: -0.02em; line-height: 1.02; }
h2 { font-size: clamp(26px, 3.4vw, 34px); }
h3 { font-size: clamp(20px, 2.2vw, 24px); }
h4 { font-size: 18px; letter-spacing: 0; }

p { max-width: 70ch; }

strong { color: #FFFFFF; }

.mono,
.u-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

::selection { background: rgba(37, 227, 212, 0.28); color: #FFFFFF; }

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gut);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.grid-12 > * { grid-column: 1 / -1; min-width: 0; }

@media (min-width: 768px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 24px; }
  .g-3 { grid-column: span 3; }
  .g-4 { grid-column: span 4; }
  .g-5 { grid-column: span 5; }
  .g-6 { grid-column: span 6; }
  .g-7 { grid-column: span 7; }
  .g-8 { grid-column: span 8; }
  .g-9 { grid-column: span 9; }
}

.divider {
  height: 1px;
  border: 0;
  background: var(--c-line);
  margin: 40px 0;
}

/* ---------- 5. 文本层级 ---------- */
.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-std);
  max-width: none;
}

.lead {
  font-size: 19px;
  line-height: 1.7;
  color: var(--c-sub);
  max-width: 62ch;
}

.muted { color: var(--c-muted); }

.prose p + p { margin-top: 1.05em; }

.prose h2 { margin: 1.7em 0 0.55em; }
.prose h3 { margin: 1.4em 0 0.5em; }

.prose ul {
  margin: 1em 0;
  padding-left: 0;
  list-style: none;
}

.prose ul li {
  position: relative;
  padding-left: 20px;
  max-width: 70ch;
}

.prose ul li + li { margin-top: 0.4em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--c-std);
}

/* ---------- 6. 面板（堆叠画板） ---------- */
.panel {
  position: relative;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--r-panel);
  padding: 22px;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .panel { padding: 32px; margin-bottom: 56px; }
}

@media (min-width: 1024px) {
  .panel { margin-bottom: 72px; }
}

.panel--notch { border-top-left-radius: 6px; }
.panel--flush { background: transparent; border-color: transparent; padding-inline: 0; }

.panel--beta {
  background: rgba(255, 122, 26, 0.07);
  border-color: rgba(255, 122, 26, 0.42);
  border-left: 4px solid var(--c-beta);
}

.panel__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--c-line);
}

.panel__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--c-std);
  font-variant-numeric: tabular-nums;
}

.panel--beta .panel__no { color: var(--c-beta); }

.panel__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: var(--c-lift);
  color: var(--c-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
  line-height: 1.2;
  transition: background var(--t-fast) ease, border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.btn:hover { background: #1B365D; border-color: var(--c-focus); color: #FFFFFF; }

.btn--primary {
  background: var(--c-std);
  border-color: var(--c-std);
  color: #03131A;
}

.btn--primary:hover { background: #4BF0E3; border-color: #4BF0E3; color: #03131A; }

.btn--accent {
  background: var(--c-beta);
  border-color: var(--c-beta);
  color: #1A0A00;
}

.btn--accent:hover { background: #FF9243; border-color: #FF9243; color: #1A0A00; }

.btn--ghost {
  background: transparent;
  border-color: rgba(37, 227, 212, 0.5);
  color: var(--c-std);
}

.btn--ghost:hover { background: rgba(37, 227, 212, 0.12); border-color: var(--c-std); color: #FFFFFF; }

.btn--sm { padding: 8px 15px; font-size: 15px; }

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--c-line);
  background: rgba(20, 42, 74, 0.5);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  white-space: nowrap;
}

.tag--std {
  color: var(--c-std);
  border-color: rgba(37, 227, 212, 0.45);
  background: rgba(37, 227, 212, 0.09);
}

.tag--beta {
  color: var(--c-beta);
  border-color: rgba(255, 122, 26, 0.48);
  background: rgba(255, 122, 26, 0.11);
}

.tag--ok {
  color: var(--c-ok);
  border-color: rgba(61, 214, 140, 0.45);
  background: rgba(61, 214, 140, 0.1);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  padding: 20px 0 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-muted);
}

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

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li::after {
  content: "/";
  color: var(--c-line);
}

.breadcrumbs li:last-child::after { content: none; }

.breadcrumbs a { color: var(--c-muted); transition: color var(--t-fast) ease; }
.breadcrumbs a:hover { color: var(--c-std); }
.breadcrumbs [aria-current="page"] { color: var(--c-text); }

/* ---------- 10. 数据带 ---------- */
.data-band {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 44px;
  align-items: flex-start;
  padding: 22px 0;
  margin: 36px 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

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

.data-band__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-std);
  font-variant-numeric: tabular-nums;
}

.data-band__num--beta { color: var(--c-beta); }
.data-band__num--plain { color: var(--c-text); }

.data-band__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  max-width: 26ch;
}

/* ---------- 11. 表格 ---------- */
.table-wrap {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: rgba(12, 23, 48, 0.6);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  min-width: 660px;
  font-size: 15px;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(42, 59, 92, 0.7);
  white-space: nowrap;
  vertical-align: middle;
}

.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #142A4A;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.data-table tbody tr { transition: background var(--t-fast) ease; }
.data-table tbody tr:nth-child(even) { background: rgba(20, 42, 74, 0.28); }
.data-table tbody tr:hover { background: var(--c-lift); }
.data-table tbody tr:last-child td { border-bottom: 0; }

.data-table th:first-child,
.data-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background: #0C1730;
  box-shadow: 1px 0 0 var(--c-line);
}

.data-table thead th:first-child { z-index: 3; background: #142A4A; }

.data-table td.num,
.data-table th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-focus);
}

.data-table .cell-strong { color: var(--c-text); font-weight: 600; }

/* ---------- 12. 折叠面板 ---------- */
.fold {
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-panel);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--t-fast) ease;
}

.fold:hover { border-color: var(--c-focus); }

.fold__sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--c-text);
}

.fold__sum::-webkit-details-marker { display: none; }
.fold__sum::marker { content: ""; }

.fold__sum::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-std);
}

.fold[open] .fold__sum {
  background: var(--c-lift);
  border-bottom: 1px solid var(--c-line);
}

.fold[open] .fold__sum::after { content: "\2013"; color: var(--c-beta); }

.fold__body { padding: 18px 20px 22px; }
.fold__body p + p { margin-top: 1em; }

/* ---------- 13. 横向滚动带 ---------- */
.scroller-shell { position: relative; }

.scroller-shell::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 48px;
  background: linear-gradient(to left, rgba(12, 23, 48, 0.95), rgba(12, 23, 48, 0));
  pointer-events: none;
  border-radius: 0 var(--r-card) var(--r-card) 0;
}

.scroller {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.scroller > * { flex: 0 0 auto; scroll-snap-align: start; }

.scroller::-webkit-scrollbar { height: 6px; }
.scroller::-webkit-scrollbar-track { background: rgba(42, 59, 92, 0.4); border-radius: 999px; }
.scroller::-webkit-scrollbar-thumb { background: var(--c-line); border-radius: 999px; }

/* ---------- 14. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: linear-gradient(150deg, #0C1730 0%, #050B18 68%);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 4 / 5; }

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.media-frame:hover img { transform: scale(1.02); }

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 59, 92, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 92, 0.55) 1px, transparent 1px);
  background-size: 38px 38px;
  opacity: 0.34;
  pointer-events: none;
}

.media-frame:has(img)::after,
.media-frame--filled::after { display: none; }

.media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 16px;
  background: linear-gradient(to top, rgba(5, 11, 24, 0.94), rgba(5, 11, 24, 0));
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
  max-width: none;
}

@media (prefers-reduced-motion: reduce) {
  .media-frame img { transition: none; }
  .media-frame:hover img { transform: none; }
}

/* ---------- 15. 通用动效 ---------- */
[data-reveal] { transition: opacity 500ms ease, transform 500ms ease; }

.has-js [data-reveal]:not(.is-in) {
  opacity: 0;
  transform: translateY(14px);
}

/* ---------- 16. 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--c-focus);
  outline-offset: 2px;
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 18px;
  background: var(--c-focus);
  color: #03131A;
  font-family: var(--font-mono);
  font-size: 14px;
  border-radius: 0 0 10px 0;
}

.skip-link:focus {
  left: 0;
  outline: 2px solid #FFFFFF;
  outline-offset: 0;
}

/* ---------- 17. 头部 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  border-bottom: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(12, 23, 48, 0.94), rgba(5, 11, 24, 0.88));
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px var(--gut) 12px;
}

.masthead__side {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.masthead__side--start { justify-self: start; }
.masthead__side--end { justify-self: end; }

.masthead__brand {
  text-align: center;
  min-width: 0;
}

.brand-mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 38px);
  line-height: 1.05;
  letter-spacing: 0.06em;
  color: var(--c-text);
  white-space: nowrap;
  transition: color var(--t-fast) ease;
}

.brand-mark:hover { color: var(--c-std); }

.brand-sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.16em;
  color: var(--c-muted);
  white-space: nowrap;
  max-width: none;
}

.ver-switch { display: flex; align-items: center; gap: 6px; }

.ver-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.ver-chip--std {
  color: var(--c-std);
  border-color: rgba(37, 227, 212, 0.5);
  background: rgba(37, 227, 212, 0.1);
}

.ver-chip--beta {
  color: var(--c-beta);
  border-color: rgba(255, 122, 26, 0.5);
  background: rgba(255, 122, 26, 0.12);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: rgba(20, 42, 74, 0.6);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--c-text);
  white-space: nowrap;
  transition: background var(--t-fast) ease, border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.icon-btn:hover {
  background: var(--c-lift);
  border-color: var(--c-focus);
  color: var(--c-focus);
}

.icon-btn--fav { border-color: rgba(255, 122, 26, 0.4); color: #FFD2B0; }

.icon-btn--fav:hover {
  border-color: var(--c-beta);
  color: var(--c-beta);
  background: rgba(255, 122, 26, 0.14);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: rgba(20, 42, 74, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-text);
  transition: border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.nav-toggle:hover { border-color: var(--c-focus); color: var(--c-focus); }

.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-focus);
  color: var(--c-focus);
  background: rgba(77, 208, 255, 0.12);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-row {
  border-top: 1px solid var(--c-line);
  background: rgba(5, 11, 24, 0.62);
}

.site-nav {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gut);
}

.site-nav__list {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav__list::-webkit-scrollbar { display: none; }

.site-nav__link {
  position: relative;
  display: block;
  padding: 14px 15px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: 0.05em;
  color: var(--c-muted);
  white-space: nowrap;
  transition: color var(--t-fast) ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: transparent;
  transition: background var(--t-fast) ease;
}

.site-nav__link:hover { color: var(--c-text); }
.site-nav__link:hover::after { background: rgba(37, 227, 212, 0.5); }

.site-nav__link[aria-current="page"] { color: var(--c-text); }
.site-nav__link[aria-current="page"]::after { background: var(--c-std); }

/* ---------- 18. 顶部快捷条 ---------- */
.quick-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  transform: translateY(-104%);
  transition: transform var(--t-slide) ease;
  background: rgba(5, 11, 24, 0.95);
  border-bottom: 1px solid var(--c-line);
  backdrop-filter: blur(10px);
}

.quick-bar[data-visible] { transform: translateY(0); }

.quick-bar__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 10px var(--gut);
  overflow-x: auto;
  scrollbar-width: none;
}

.quick-bar__inner::-webkit-scrollbar { display: none; }

.quick-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  background: rgba(20, 42, 74, 0.8);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.03em;
  line-height: 1.3;
  color: var(--c-text);
  white-space: nowrap;
  transition: background var(--t-fast) ease, border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.quick-btn:hover { border-color: var(--c-focus); color: var(--c-focus); background: var(--c-lift); }

.quick-btn--primary {
  background: var(--c-std);
  border-color: var(--c-std);
  color: #03131A;
}

.quick-btn--primary:hover { background: #4BF0E3; border-color: #4BF0E3; color: #03131A; }

.quick-btn--copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.quick-btn--copy[data-copied] {
  border-color: var(--c-ok);
  color: var(--c-ok);
}

.quick-ver {
  flex: 0 0 auto;
  display: flex;
  align-items: stretch;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  overflow: hidden;
}

.quick-ver__item {
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  white-space: nowrap;
  transition: color var(--t-fast) ease, background var(--t-fast) ease;
}

.quick-ver__item.is-std { color: var(--c-std); background: rgba(37, 227, 212, 0.1); }
.quick-ver__item.is-beta { color: var(--c-beta); background: rgba(255, 122, 26, 0.13); }
.quick-ver__item:hover { color: #FFFFFF; background: var(--c-lift); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--c-std) 0%, var(--c-focus) 58%, var(--c-beta) 100%);
  transition: width 120ms linear;
}

/* ---------- 19. 移动端悬浮收藏 ---------- */
.mobile-fab {
  display: none;
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 70;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--c-beta);
  color: #1A0A00;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.5);
}

.mobile-fab:hover { background: #FF9243; }

/* ---------- 20. 页脚 ---------- */
.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(12, 23, 48, 0.88), rgba(5, 11, 24, 0.99));
}

.footer-band {
  background: rgba(255, 122, 26, 0.08);
  border-bottom: 1px solid rgba(255, 122, 26, 0.34);
}

.footer-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px var(--gut);
}

.footer-band__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--c-text);
}

.footer-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: 48px;
  padding-bottom: 36px;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-top: 60px; }
}

.footer-col { min-width: 0; }

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--c-text);
  max-width: none;
}

.footer-brand-note {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  max-width: 34ch;
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-std);
}

.footer-list li + li { margin-top: 10px; }

.footer-list a {
  font-size: 15px;
  color: var(--c-muted);
  transition: color var(--t-fast) ease;
}

.footer-list a:hover { color: var(--c-text); }

.footer-base {
  padding-top: 22px;
  padding-bottom: 34px;
  border-top: 1px solid var(--c-line);
}

.footer-legal {
  font-size: 14px;
  color: var(--c-muted);
  max-width: none;
}

.footer-contact {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--c-muted);
  max-width: none;
  word-break: break-word;
}

.footer-note {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
  max-width: none;
}

/* ---------- 21. 响应式：移动端头部 ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    padding-bottom: 10px;
  }

  .site-nav[data-open] {
    display: block;
    animation: navIn var(--t-slide) ease;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .site-nav__link {
    padding: 13px 2px 13px 14px;
    border-bottom: 1px solid rgba(42, 59, 92, 0.6);
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    bottom: -1px;
    width: 3px;
    height: auto;
    top: 8px;
    bottom: 8px;
    border-radius: 0 2px 2px 0;
  }

  .site-nav__link[aria-current="page"]::after { background: var(--c-std); }

  .mobile-fab { display: inline-flex; }
}

@keyframes navIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 640px) {
  .masthead { padding: 12px var(--gut) 10px; gap: 6px; }
  .masthead__side--start .ver-chip--std { display: none; }
  .icon-btn { padding: 6px 11px; font-size: 14px; }
  .icon-btn--fav { display: none; }
  .nav-toggle { padding: 6px 11px; }
  .nav-toggle__label { display: none; }
  .brand-sub { letter-spacing: 0.1em; }
  .site-footer { margin-top: 56px; }
  .footer-band__inner { padding: 18px var(--gut); }
  .footer-band__text { font-size: 17px; }
}

/* ---------- 22. 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;
  }

  [data-reveal],
  .has-js [data-reveal]:not(.is-in) {
    opacity: 1;
    transform: none;
  }

  .quick-bar { transition: none; }
  .scroll-progress__bar { transition: none; }
}