/* =========================================================
   百胜游戏厅 · 官方中文站  /assets/site.css
   共享层：reset / 变量 / 中文排版 / 框架导航 / 页脚 / 通用组件
   ========================================================= */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, picture, svg, video { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
table { border-collapse: collapse; }
a { color: var(--neon); }

/* ---------- 变量 ---------- */
:root {
  --ink: #05070F;
  --frame: #0B1122;
  --layer: #131C33;
  --line: #26304D;
  --text: #F3F6FF;
  --muted: #A3AECB;
  --neon: #35E6FF;
  --violet: #7C5CFF;
  --amber: #FF7A33;
  --ok: #3DDC97;
  --paper: #E9EEF8;

  --font-display: 'Chakra Petch', 'Orbitron', 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --calbar-h: 34px;
  --rail-w: 236px;
  --page-max: 1280px;
  --gut: clamp(16px, 3vw, 40px);
  --gap: 24px;
  --radius: 2px;
}

/* ---------- 基底 ---------- */
html:focus-within { scroll-behavior: smooth; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-top: var(--calbar-h);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(8deg, rgba(38, 48, 77, 0) 0 47px, rgba(38, 48, 77, 0.5) 47px 48px),
    radial-gradient(60rem 42rem at 84% -12%, rgba(124, 92, 255, 0.2), rgba(5, 7, 15, 0) 70%),
    radial-gradient(48rem 38rem at 4% 10%, rgba(53, 230, 255, 0.12), rgba(5, 7, 15, 0) 72%);
  background-attachment: fixed;
  overflow-x: hidden;
}
@media (min-width: 1080px) {
  body { padding-left: var(--rail-w); }
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; letter-spacing: 0.015em; }
h1 { font-size: clamp(34px, 5vw, 62px); }
h2 { font-size: clamp(26px, 3.2vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }
h1, h2 { transform: scaleX(1.02); transform-origin: left center; }

p { line-height: 1.8; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.045em;
}

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
  border-radius: var(--radius);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

#main-content { scroll-margin-top: calc(var(--calbar-h) + 16px); }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 6px; left: 12px;
  z-index: 200;
  padding: 8px 14px;
  background: var(--neon);
  color: #04202A;
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 顶部校准状态条 ---------- */
.site-header { position: relative; z-index: 60; }

.calbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--calbar-h);
  z-index: 90;
  background: var(--frame);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
}
.calbar::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, rgba(53, 230, 255, 0) 0%, rgba(53, 230, 255, 0.75) 30%, rgba(124, 92, 255, 0.75) 70%, rgba(124, 92, 255, 0) 100%);
}
.calbar__inner {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: clamp(12px, 2vw, 24px);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2.4vw, 30px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.07em;
  color: var(--muted);
}
.calbar__item { display: flex; align-items: center; gap: 0.5rem; margin: 0; white-space: nowrap; }
.calbar__item--season { color: var(--muted); }
.calbar__season { color: var(--text); }
.calbar__batch { color: var(--muted); }
.calbar__item--count { color: var(--muted); }
.calbar__count-label { color: var(--muted); }
.calbar__clock { color: var(--amber); font-weight: 700; letter-spacing: 0.06em; }
.calbar__day { color: var(--muted); }
.calbar__tools { margin-left: auto; display: flex; align-items: center; gap: 6px; }

.calbar__btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(19, 28, 51, 0.7);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.calbar__btn:hover { color: var(--neon); border-color: rgba(53, 230, 255, 0.6); background: rgba(53, 230, 255, 0.08); }
.calbar__btn[aria-expanded="true"] { color: var(--ink); background: var(--neon); border-color: var(--neon); }

.dot {
  width: 6px; height: 6px; flex: none;
  border-radius: 50%;
  background: var(--muted);
  display: inline-block;
}
.dot--ok { background: var(--ok); box-shadow: 0 0 0 3px rgba(61, 220, 151, 0.18); }

.progress {
  position: absolute;
  left: 0; bottom: 0;
  height: 2px; width: 0;
  background: linear-gradient(90deg, var(--neon), var(--violet));
}

/* ---------- 检索面板 ---------- */
.calpanel {
  position: fixed;
  top: var(--calbar-h); left: 0; right: 0;
  z-index: 88;
  background: var(--frame);
  border-bottom: 1px solid var(--line);
  padding: 14px var(--gut);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}
.calpanel[hidden] { display: none; }
@media (min-width: 1080px) { .calpanel { left: var(--rail-w); } }
.calpanel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--neon);
}
.calpanel__link {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  padding: 5px 12px;
  border: 1px solid var(--line);
  background: rgba(19, 28, 51, 0.6);
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.calpanel__link:hover { color: var(--text); border-color: var(--neon); transform: translateY(-2px); }

/* ---------- 左侧框架导航 ---------- */
.rail-scrim {
  position: fixed;
  inset: var(--calbar-h) 0 0 0;
  z-index: 78;
  background: rgba(3, 5, 12, 0.72);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease;
}
.site-header[data-open] .rail-scrim { opacity: 1; pointer-events: auto; }

.rail {
  position: fixed;
  top: var(--calbar-h); left: 0;
  z-index: 86;
  width: min(320px, 86vw);
  height: calc(100vh - var(--calbar-h));
  height: calc(100dvh - var(--calbar-h));
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px 18px 20px;
  overflow-y: auto;
  background: linear-gradient(180deg, var(--frame) 0%, #070B16 72%, var(--ink) 100%);
  border-right: 1px solid var(--line);
  box-shadow: 24px 0 60px rgba(0, 0, 0, 0.6);
  transform: translateX(-102%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.site-header[data-open] .rail { transform: none; }

@media (min-width: 1080px) {
  .rail-scrim { display: none; }
  .rail {
    width: var(--rail-w);
    transform: none;
    box-shadow: none;
    z-index: 70;
  }
}

.rail__brand { padding-bottom: 14px; border-bottom: 1px solid var(--line); }

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-lockup__mark {
  flex: none;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--neon);
  background: rgba(53, 230, 255, 0.09);
  color: var(--neon);
  font-size: 13px;
  letter-spacing: 0.06em;
}
.brand-lockup__text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-lockup__name {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.06em;
  transform: scaleX(1.02);
  transform-origin: left center;
}
.brand-lockup__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.brand-lockup--footer .brand-lockup__name { font-size: 19px; }

.rail__nav { flex: 1 1 auto; }
.nav-list { display: flex; flex-direction: column; gap: 2px; }
.nav-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
  border-left: 2px solid transparent;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.nav-link__idx { font-size: 11px; color: #3A466A; letter-spacing: 0.12em; }
.nav-link:hover {
  color: var(--text);
  background: rgba(19, 28, 51, 0.9);
  border-left-color: var(--neon);
  transform: translateX(2px);
}
.nav-link:hover .nav-link__idx { color: var(--neon); }
.nav-link[aria-current="page"] {
  color: var(--ink);
  background: var(--neon);
  border-left-color: var(--neon);
  font-weight: 700;
}
.nav-link[aria-current="page"] .nav-link__idx { color: rgba(5, 7, 15, 0.62); }

.rail__foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail__cta { width: 100%; justify-content: center; }
.rail__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.65;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  background: var(--layer);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}
.btn:hover { transform: translateY(-2px); border-color: var(--neon); color: var(--neon); }
.btn--amber { background: var(--amber); border-color: var(--amber); color: #1B0A00; font-weight: 700; }
.btn--amber:hover { background: #FF9155; border-color: #FF9155; color: #1B0A00; }
.btn--ghost { background: transparent; color: var(--muted); }
.btn--ghost:hover { color: var(--neon); }
.btn--neon { background: var(--neon); border-color: var(--neon); color: #04202A; font-weight: 700; }
.btn--neon:hover { color: #04202A; background: #64EEFF; border-color: #64EEFF; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: auto;
  position: relative;
  background: linear-gradient(180deg, var(--frame) 0%, #04060D 100%);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute; top: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, rgba(53, 230, 255, 0.65) 0%, rgba(53, 230, 255, 0) 42%, rgba(124, 92, 255, 0.65) 100%);
}
.footer__top {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 56px) var(--gut) 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
}
@media (min-width: 880px) {
  .footer__top { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.45fr); }
}
.footer__summary {
  margin: 16px 0 12px;
  max-width: 46ch;
  font-size: 14px;
  color: var(--muted);
}
.footer__stamp { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 11.5px; color: #6E7B9E; }

.footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 22px;
}
.footer__col-title {
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--neon);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.footer__list { display: flex; flex-direction: column; gap: 8px; }
.footer__link {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.footer__link:hover { color: var(--text); border-bottom-color: var(--neon); transform: translateY(-1px); }

.footer__contact {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: 16px var(--gut);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  font-size: 13px;
  color: var(--muted);
}
.footer__contact-item { display: inline-flex; gap: 6px; }
.footer__contact-item .mono { color: var(--neon); font-size: 11.5px; letter-spacing: 0.14em; }

.footer__legal {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: 16px var(--gut) 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: #6E7B9E;
}
.footer__legal-item { white-space: nowrap; }

/* ---------- 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gut);
}
.page-main { flex: 1 0 auto; padding: clamp(24px, 3.5vw, 48px) 0 72px; }
.section { margin-block: clamp(36px, 6vw, 76px); }
.stack > * + * { margin-top: 16px; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

.g12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }
@media (max-width: 960px) {
  .g12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-8, .col-9 { grid-column: span 6; }
}
.offset-up { margin-top: -18px; }
.offset-down { margin-top: 24px; }

.layout-editorial {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}
@media (max-width: 960px) { .layout-editorial { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 分节与编辑部元素 ---------- */
.sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-bottom: 10px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.sec-head__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--neon);
}
.sec-head__title { margin: 0; }
.sec-head__note { grid-column: 2; color: var(--muted); font-size: 13px; }

.note {
  border-left: 2px solid var(--violet);
  background: rgba(19, 28, 51, 0.72);
  padding: 14px 16px;
  color: var(--muted);
  font-size: 14px;
}
.note__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--violet);
}
.paper {
  background: var(--paper);
  color: #0A1020;
  border: 1px solid #C6D2E6;
  padding: clamp(18px, 3vw, 34px);
}
.paper a { color: #0B4F6C; }
.paper .note__label { color: #5A3AD6; }
.panel { border: 1px solid var(--line); background: rgba(11, 17, 34, 0.72); }
.panel__head {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--layer);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
}
.panel__body { padding: 16px; }

.prose { font-size: 16.5px; line-height: 1.85; }
.prose p { max-width: 38em; }
.prose p + p { margin-top: 14px; }
.prose h3 { margin-top: 28px; margin-bottom: 10px; }

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__item + .crumbs__item::before { content: "/"; color: var(--line); }
.crumbs__link { color: var(--muted); text-decoration: none; border-bottom: 1px dashed var(--line); }
.crumbs__link:hover { color: var(--neon); border-bottom-color: var(--neon); }
.crumbs [aria-current="page"] { color: var(--text); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: rgba(19, 28, 51, 0.7);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}
.tag--neon { color: var(--neon); border-color: rgba(53, 230, 255, 0.5); background: rgba(53, 230, 255, 0.08); }
.tag--violet { color: #B5A4FF; border-color: rgba(124, 92, 255, 0.5); background: rgba(124, 92, 255, 0.12); }
.tag--amber { color: var(--amber); border-color: rgba(255, 122, 51, 0.5); background: rgba(255, 122, 51, 0.1); }
.tag--ok { color: var(--ok); border-color: rgba(61, 220, 151, 0.5); background: rgba(61, 220, 151, 0.1); }

/* ---------- 数据表 ---------- */
.data-table { width: 100%; font-size: 14px; }
.data-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.data-table th, .data-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); }
.data-table thead th {
  position: sticky;
  top: var(--calbar-h);
  background: var(--layer);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  z-index: 2;
}
.data-table tbody tr:hover { background: rgba(19, 28, 51, 0.7); }
.data-table td.num, .data-table .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- 标签页 / 折叠 / 索引 ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.tab {
  appearance: none;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: rgba(19, 28, 51, 0.6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.tab:hover { color: var(--text); border-color: var(--neon); }
.tab[aria-selected="true"] { color: #04202A; background: var(--neon); border-color: var(--neon); font-weight: 700; }

.fold { border: 1px solid var(--line); background: rgba(11, 17, 34, 0.6); }
.fold + .fold { border-top: 0; }
.fold__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 16px;
  border: 0;
  background: var(--layer);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease;
}
.fold__head::after { content: "+"; font-family: var(--font-mono); color: var(--neon); }
.fold__head[aria-expanded="true"] { color: var(--neon); background: rgba(53, 230, 255, 0.08); }
.fold__head[aria-expanded="true"]::after { content: "–"; }
.fold__body { padding: 14px 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14.5px; }
.fold__body[hidden] { display: none; }

.toc { display: flex; flex-direction: column; gap: 4px; }
.toc__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 6px 8px;
  border-left: 2px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.toc__link:hover { color: var(--text); border-left-color: var(--neon); transform: translateX(2px); }
.toc__link[aria-current="true"] { color: var(--neon); border-left-color: var(--neon); background: rgba(53, 230, 255, 0.07); }

/* ---------- 图片容器（供页面阶段放置图片） ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(8deg, rgba(38, 48, 77, 0) 0 23px, rgba(38, 48, 77, 0.55) 23px 24px),
    linear-gradient(155deg, rgba(124, 92, 255, 0.22), rgba(5, 7, 15, 0.92) 70%),
    var(--layer);
}
.media::before { content: ""; display: block; padding-top: 56.25%; }
.media--21x9::before { padding-top: 42.86%; }
.media--4x3::before { padding-top: 75%; }
.media--1x1::before { padding-top: 100%; }
.media > img, .media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: rgba(163, 174, 203, 0.75);
}
.media__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 8px 12px;
  background: linear-gradient(180deg, rgba(5, 7, 15, 0), rgba(5, 7, 15, 0.9));
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

/* ---------- 显现 / 回顶 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
[data-reveal].is-in { opacity: 1; transform: none; }

.to-top {
  appearance: none;
  position: fixed;
  right: 18px; bottom: 18px;
  z-index: 50;
  padding: 9px 13px;
  border: 1px solid var(--line);
  background: rgba(11, 17, 34, 0.9);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.to-top:hover { color: var(--neon); border-color: var(--neon); transform: translateY(-2px); }

/* ---------- 滚动锁定 ---------- */
html.is-nav-open { overflow: hidden; }
@media (min-width: 1080px) { html.is-nav-open { overflow: auto; } }

/* ---------- 小屏校准条收敛 ---------- */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
}
@media (min-width: 1024px) {
  .nav-toggle { display: none; }
}
@media (max-width: 900px) {
  .calbar__batch { display: none; }
}
@media (max-width: 680px) {
  .calbar__season { display: none; }
  .calbar__count-label { display: none; }
  .calbar__inner { font-size: 11px; }
}
@media (max-width: 520px) {
  .calbar__day { display: none; }
  .calbar__btn { padding: 4px 8px; font-size: 11px; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { 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; }
}