/* ============================================================
   九洲主站 · 共享样式 /assets/site.css
   高原档案室 × 未来参数图谱
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 24px; }
body { margin: 0; }
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --jz-deep: #10333E;
  --jz-mid: #1C5563;
  --jz-red: #B4472F;
  --jz-red-lt: #D97757;
  --jz-green: #17715A;
  --jz-bronze: #C08A3E;
  --jz-paper: #F4EFE6;
  --jz-paper-2: #E4DCCD;
  --jz-ink: #1B1D1C;
  --jz-gray: #6B6E6A;
  --jz-line: rgba(192, 138, 62, .45);
  --jz-line-soft: rgba(192, 138, 62, .22);
  --jz-on-dark: rgba(244, 239, 230, .78);
  --font-head: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --font-body: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
  --shell: 1240px;
  --pad: clamp(18px, 4vw, 40px);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. Base ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .01em;
  color: var(--jz-ink);
  background-color: var(--jz-paper);
  background-image:
    linear-gradient(rgba(192, 138, 62, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 138, 62, .07) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
}
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 900; letter-spacing: -.02em; line-height: 1.28; }
a { transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease); }
:focus-visible { outline: 2px solid var(--jz-red-lt); outline-offset: 3px; }
::selection { background: var(--jz-red-lt); color: #fff; }

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--pad); }
.page-main { display: block; position: relative; }

.skip-link {
  position: absolute;
  left: var(--pad);
  top: -70px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--jz-red);
  color: #fff;
  font-size: 14px;
  letter-spacing: .08em;
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 4. Header ---------- */
.site-header { position: relative; z-index: 60; background: var(--jz-deep); color: var(--jz-paper); }

.header-strip { border-bottom: 1px solid var(--jz-line-soft); }
.header-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 42px;
}
.header-strip__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: rgba(244, 239, 230, .55);
  white-space: nowrap;
}
.stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--jz-line);
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.stamp--left { border-left-width: 3px; }
.stamp--right { border-right-width: 3px; }
.stamp:hover { background: rgba(192, 138, 62, .16); border-color: var(--jz-bronze); }
.stamp__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--jz-bronze);
}
.stamp__label { font-size: 13px; letter-spacing: .16em; color: var(--jz-paper); }

.masthead {
  padding: 26px 0 20px;
  background-image: repeating-linear-gradient(90deg, rgba(244, 239, 230, .045) 0 1px, transparent 1px 22px);
  border-bottom: 3px double var(--jz-line);
}
.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}
.masthead__note {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-head);
  font-size: 11.5px;
  letter-spacing: .34em;
  color: rgba(244, 239, 230, .48);
  height: max-content;
}
.masthead__note--left { justify-self: start; }
.masthead__note--right { justify-self: end; }

.brand { display: block; text-align: center; }
.brand__mark {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 58px);
  letter-spacing: .1em;
  line-height: 1.08;
  color: var(--jz-paper);
}
.brand__line {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: .32em;
  color: var(--jz-bronze);
}
.brand--footer { text-align: left; }
.brand--footer .brand__mark { font-size: clamp(24px, 3vw, 30px); letter-spacing: .08em; }
.brand--footer .brand__line { letter-spacing: .22em; }

.nav-bar { position: relative; background: var(--jz-mid); border-bottom: 1px solid var(--jz-line); }
.nav-bar__inner {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 0 16px;
  min-height: 56px;
}
.nav-toggle {
  grid-column: 1;
  grid-row: 1;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0;
  padding: 8px 12px;
  border: 1px solid var(--jz-line);
  color: var(--jz-paper);
  font-size: 13px;
  letter-spacing: .14em;
  cursor: pointer;
}
.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 1px;
  background: var(--jz-bronze);
  box-shadow: 0 -5px 0 var(--jz-bronze), 0 5px 0 var(--jz-bronze);
}
.nav-bar[data-open] .nav-toggle { background: rgba(192, 138, 62, .18); border-color: var(--jz-bronze); }
.nav-bar[data-open] .nav-toggle__bars { background: var(--jz-red-lt); box-shadow: 0 -5px 0 var(--jz-red-lt), 0 5px 0 var(--jz-red-lt); }

.nav-wrap { grid-column: 1 / -1; grid-row: 2; display: none; padding-bottom: 14px; border-top: 1px solid var(--jz-line-soft); }
.nav-bar[data-open] .nav-wrap { display: block; }
.nav { display: flex; flex-direction: column; }
.nav__item { position: relative; }
.nav__link {
  display: block;
  padding: 13px 2px;
  font-size: 15px;
  letter-spacing: .14em;
  color: rgba(244, 239, 230, .86);
  border-bottom: 3px solid transparent;
}
.nav__link:hover { color: #fff; }
.nav__link[aria-current="page"] { color: #fff; border-bottom-color: var(--jz-red-lt); }

.nav-bar__utility {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-bar__hours {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(244, 239, 230, .6);
  white-space: nowrap;
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background: rgba(192, 138, 62, .2);
  pointer-events: none;
}
.read-progress__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--jz-red) 0%, var(--jz-red-lt) 100%);
  transition: width .12s linear;
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  font-size: 14px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.btn--primary { background: var(--jz-red); border-color: var(--jz-red); color: #fff; }
.btn--primary:hover { background: var(--jz-red-lt); border-color: var(--jz-red-lt); }
.btn--ghost { background: transparent; border-color: var(--jz-line); color: var(--jz-paper); }
.btn--ghost:hover { background: rgba(192, 138, 62, .16); border-color: var(--jz-bronze); }
.btn--sm { padding: 8px 14px; font-size: 12.5px; letter-spacing: .1em; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px dashed rgba(192, 138, 62, .7);
  color: var(--jz-bronze);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}
.copy-btn:hover { background: rgba(192, 138, 62, .16); color: var(--jz-paper); }

.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 110;
  padding: 10px 16px;
  background: var(--jz-deep);
  border: 1px solid var(--jz-bronze);
  color: var(--jz-paper);
  font-size: 13px;
  letter-spacing: .12em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s var(--ease), visibility .2s var(--ease);
}
.to-top[data-visible] { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--jz-mid); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 130;
  padding: 10px 20px;
  background: var(--jz-deep);
  border: 1px solid var(--jz-bronze);
  color: var(--jz-paper);
  font-size: 13.5px;
  letter-spacing: .06em;
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.toast[data-show] { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 6. Content primitives ---------- */
.breadcrumb { padding: 20px 0 6px; font-size: 13px; color: var(--jz-gray); }
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb__item { display: inline-flex; align-items: center; }
.breadcrumb__item + .breadcrumb__item::before { content: "／"; margin-right: 8px; color: var(--jz-bronze); }
.breadcrumb a { color: var(--jz-mid); border-bottom: 1px solid var(--jz-line-soft); }
.breadcrumb a:hover { color: var(--jz-red); }

.section { padding: 64px 0; border-top: 1px solid var(--jz-line); position: relative; }
.section--tint { background: var(--jz-paper-2); }
.section--deep { background: var(--jz-deep); color: var(--jz-paper); border-top-color: var(--jz-bronze); }
.section--deep .section__sub { color: rgba(244, 239, 230, .7); }
.section__head {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  margin-bottom: 34px;
}
.section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jz-gray);
  padding-top: 8px;
  transition: color .2s var(--ease), transform .2s var(--ease);
}
[data-section][data-active] .section__num { color: var(--jz-red); transform: translateX(4px); }
.section--deep [data-section][data-active] .section__num { color: var(--jz-red-lt); }
.section__title { font-size: clamp(26px, 3.4vw, 40px); }
.section__sub { margin-top: 12px; max-width: 40em; font-size: 15.5px; color: var(--jz-gray); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--jz-bronze);
}
.lede {
  font-family: var(--font-head);
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.72;
  color: var(--jz-mid);
}
.section--deep .lede { color: var(--jz-paper); }
.prose { max-width: 38em; font-size: 17px; line-height: 1.85; }
.prose p + p { margin-top: 1em; }
.vnote {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-head);
  font-size: 11.5px;
  letter-spacing: .32em;
  color: var(--jz-gray);
  height: max-content;
}
.hairline { height: 1px; border: 0; background: var(--jz-line); }

/* ---------- 7. Grid ---------- */
.grid { display: grid; gap: 26px; }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 8. Table ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--jz-line);
  background: var(--jz-paper);
}
.table { width: 100%; min-width: 620px; font-size: 15px; }
.table caption {
  caption-side: top;
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-head);
  font-size: 13.5px;
  letter-spacing: .1em;
  color: var(--jz-gray);
  border-bottom: 1px solid var(--jz-line-soft);
}
.table th, .table td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--jz-paper-2); }
.table thead th {
  background: var(--jz-deep);
  color: var(--jz-paper);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: .12em;
}
.table tbody tr:nth-child(even) { background: rgba(228, 220, 205, .45); }
.table tbody tr:hover { background: rgba(217, 119, 87, .16); }
.num { font-family: var(--font-mono); letter-spacing: .04em; font-variant-numeric: tabular-nums; }

/* ---------- 9. Tags ---------- */
.tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--jz-bronze);
  color: var(--jz-bronze);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  white-space: nowrap;
}
.tag--pass { border-color: var(--jz-green); color: var(--jz-green); }
.tag--focus { border-color: var(--jz-red); color: var(--jz-red); background: rgba(180, 71, 47, .08); }
.tag--muted { border-color: rgba(107, 110, 106, .5); color: var(--jz-gray); }

/* ---------- 10. Figure ---------- */
.figure { margin: 0; }
.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--jz-paper-2);
  border: 1px solid var(--jz-line);
}
.figure__frame > img { width: 100%; height: 100%; object-fit: cover; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--tall .figure__frame { aspect-ratio: 3 / 4; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure__caption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--jz-bronze);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--jz-gray);
}

/* ---------- 11. Tabs ---------- */
.tabs__list { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--jz-line); }
.tabs__btn {
  padding: 10px 18px;
  border: 1px solid transparent;
  border-bottom: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--jz-gray);
  cursor: pointer;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.tabs__btn:hover { color: var(--jz-mid); }
.tabs__btn[aria-selected="true"] {
  background: var(--jz-paper);
  border-color: var(--jz-line);
  color: var(--jz-red);
}
.tabs__panel { padding-top: 24px; }

/* ---------- 12. Filter ---------- */
.filter { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.filter__btn {
  padding: 8px 14px;
  border: 1px solid var(--jz-line);
  color: var(--jz-mid);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.filter__btn:hover { border-color: var(--jz-bronze); color: var(--jz-red); }
.filter__btn[aria-pressed="true"] { background: var(--jz-mid); border-color: var(--jz-mid); color: var(--jz-paper); }
.filter__note { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; color: var(--jz-gray); }

/* ---------- 13. Key-value ---------- */
.kv { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px 20px; font-size: 15px; }
.kv__k { font-size: 13px; letter-spacing: .1em; color: var(--jz-gray); }
.kv__v { font-family: var(--font-mono); letter-spacing: .02em; }

/* ---------- 14. Reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(10px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
[data-reveal].is-revealed { opacity: 1; transform: none; }

/* ---------- 15. Footer ---------- */
.site-footer { position: relative; background: var(--jz-deep); color: var(--jz-on-dark); font-size: 14px; }
.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(90deg,
    var(--jz-red) 0 22%,
    var(--jz-bronze) 22% 46%,
    var(--jz-green) 46% 70%,
    var(--jz-mid) 70% 100%);
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 48px;
  padding: 54px 0 34px;
}
.footer__brand { max-width: 34ch; }
.footer__tagline { margin-top: 18px; max-width: 30ch; line-height: 1.9; color: rgba(244, 239, 230, .62); }
.footer__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.footer__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.footer__heading {
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .2em;
  color: var(--jz-bronze);
}
.footer__links li + li { margin-top: 9px; }
.footer__links a { color: rgba(244, 239, 230, .82); border-bottom: 1px solid transparent; }
.footer__links a:hover { color: #fff; border-bottom-color: var(--jz-red-lt); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  padding: 18px 0;
  border-top: 1px solid var(--jz-line-soft);
  border-bottom: 1px solid var(--jz-line-soft);
}
.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: rgba(244, 239, 230, .7);
}
.legend__swatch { width: 12px; height: 12px; border: 1px solid rgba(244, 239, 230, .35); }
.legend__swatch--red { background: var(--jz-red-lt); }
.legend__swatch--green { background: var(--jz-green); }
.legend__swatch--bronze { background: var(--jz-bronze); }

.footer__meta {
  display: grid;
  gap: 8px;
  padding: 22px 0 44px;
  font-size: 13px;
  color: rgba(244, 239, 230, .6);
}
.footer__legal { font-family: var(--font-mono); letter-spacing: .04em; color: rgba(244, 239, 230, .74); }
.footer__contact { font-family: var(--font-mono); letter-spacing: .02em; }
.footer__note { color: rgba(244, 239, 230, .45); }

/* ---------- 16. Responsive ---------- */
@media (max-width: 1080px) {
  .col-3, .col-4 { grid-column: span 6; }
  .nav-bar__hours { display: none; }
}
@media (max-width: 900px) {
  .footer__top { grid-template-columns: minmax(0, 1fr); gap: 34px; padding-top: 44px; }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section__head { grid-template-columns: 64px minmax(0, 1fr); gap: 16px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .col-3, .col-4, .col-6, .col-8 { grid-column: span 12; }
  .masthead__note { display: none; }
  .masthead { padding: 22px 0 16px; }
  .masthead__inner { grid-template-columns: minmax(0, 1fr); }
  .header-strip__meta { display: none; }
  .header-strip__inner { justify-content: space-between; }
  .section { padding: 46px 0; }
  .section__head { grid-template-columns: minmax(0, 1fr); }
  .section__num { padding-top: 0; }
  .table { min-width: 520px; }
  .to-top { right: 14px; bottom: 14px; }
}
@media (max-width: 560px) {
  .footer__cols { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .stamp__code { display: none; }
}

/* ---------- 17. Motion preferences ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}