/* ============================================================
   黄金城娱乐 · 归档大厅 — 共享样式 /assets/site.css
   ============================================================ */

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

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

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
table { border-collapse: collapse; width: 100%; }
strong { font-weight: 700; }

/* ---------- tokens ---------- */
:root {
  --ink-green: #0C1A16;
  --night: #060F0C;
  --gold: #A07C33;
  --gold-bright: #C9A95C;
  --amber: #D07A2A;
  --silver: #9BA6A3;
  --stone: #454F4C;
  --moss: #3F5A45;
  --clay: #9E5238;
  --paper: #F1EADA;
  --paper-shadow: #DAD2BE;
  --ivory: #EDE6D6;

  --line-gold: rgba(160, 124, 51, .42);
  --line-faint: rgba(155, 166, 163, .22);

  --rail-w: 236px;
  --frame-pad: clamp(20px, 4vw, 64px);
  --max-w: 1180px;

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

  --t-frame: 120ms;
  --t-soft: 160ms;
  --t-fold: 200ms;
  --ease: cubic-bezier(.2, .6, .2, 1);
}

/* ---------- page ---------- */
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-green);
  background-image:
    repeating-linear-gradient(0deg, rgba(241, 234, 218, .022) 0 1px, transparent 1px 4px),
    radial-gradient(120% 90% at 6% -12%, rgba(63, 90, 69, .40), transparent 62%),
    radial-gradient(100% 78% at 104% 2%, rgba(160, 124, 51, .17), transparent 58%);
  color: var(--ivory);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .005em;
}

@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

::selection { background: rgba(160, 124, 51, .38); color: var(--ivory); }

:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 120;
  padding: 10px 16px;
  background: var(--paper);
  color: #0C1A16;
  font-size: 14px;
  border: 1px solid var(--gold);
  transform: translateY(-240%);
  transition: transform var(--t-frame) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  padding: 22px 18px 20px;
  background: linear-gradient(180deg, #060F0C 0%, #08130F 48%, #0C1A16 100%);
  border-right: 1px solid var(--line-gold);
  box-shadow: 8px 0 24px -18px rgba(0, 0, 0, .9);
  z-index: 60;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* brand */
.rail-brand {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-faint);
}
.brand {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.brand-mark {
  flex: 0 0 12px;
  width: 12px;
  height: 30px;
  margin-top: 3px;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  box-shadow: 0 0 0 1px rgba(6, 15, 12, .85), 4px 0 0 -1px rgba(160, 124, 51, .26);
  transition: background var(--t-soft) var(--ease), transform var(--t-frame) var(--ease);
}
.brand:hover .brand-mark { transform: translateX(2px); }
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.25;
  color: var(--ivory);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--silver);
  text-transform: uppercase;
}

/* toggle (mobile only) */
.nav-toggle { display: none; }
.nav-toggle-lines {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle-lines i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--t-frame) var(--ease);
}

/* nav */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 18px;
}
.nav-caption {
  padding: 0 0 8px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--silver);
  text-transform: uppercase;
}
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 9px 10px 9px 12px;
  font-size: 15px;
  color: var(--silver);
  border-left: 2px solid transparent;
  transition:
    color var(--t-soft) var(--ease),
    border-color var(--t-soft) var(--ease),
    background-color var(--t-soft) var(--ease);
}
.nav-link:hover {
  color: var(--ivory);
  border-left-color: var(--gold);
  background: rgba(69, 79, 76, .30);
}
.nav-link[aria-current="page"] {
  color: var(--ivory);
  font-weight: 600;
  border-left-color: var(--gold-bright);
  background: linear-gradient(90deg, rgba(160, 124, 51, .22), rgba(160, 124, 51, 0));
}

.cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 4px;
}
.cat-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 5px 8px;
  border: 1px solid var(--line-faint);
  background: rgba(69, 79, 76, .20);
  transition:
    border-color var(--t-frame) var(--ease),
    background-color var(--t-soft) var(--ease),
    transform var(--t-frame) var(--ease);
}
.cat-item:hover {
  border-color: var(--gold);
  background: rgba(63, 90, 69, .48);
  transform: translateX(2px);
}
.cat-code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--amber);
}
.cat-name { font-size: 12px; color: var(--silver); }

/* rail foot */
.rail-foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-faint);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail-note {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .08em;
  color: var(--silver);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--gold-bright);
  border: 1px solid var(--gold);
  background: linear-gradient(90deg, rgba(160, 124, 51, .16), rgba(160, 124, 51, .02));
  transition:
    border-color var(--t-frame) var(--ease),
    color var(--t-frame) var(--ease),
    background var(--t-soft) var(--ease),
    box-shadow var(--t-frame) var(--ease);
}
.btn:hover {
  color: var(--ivory);
  border-color: var(--gold-bright);
  background: linear-gradient(90deg, rgba(201, 169, 92, .24), rgba(160, 124, 51, .05));
  box-shadow: inset 0 0 0 1px rgba(201, 169, 92, .32);
}
.btn-rail { width: 100%; }

/* ---------- scroll meter ---------- */
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 80;
  background: rgba(155, 166, 163, .10);
  pointer-events: none;
}
.scroll-meter-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-bright));
}

/* ---------- main / layout ---------- */
#main-content {
  display: block;
  min-height: 52vh;
  padding: clamp(26px, 3.6vw, 54px) var(--frame-pad) 0;
}

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section { padding: clamp(26px, 4vw, 54px) 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding-bottom: 14px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line-faint);
}

.grid { display: grid; gap: clamp(16px, 2vw, 26px); }
.grid-5-7 { grid-template-columns: 5fr 7fr; }
.grid-4-8 { grid-template-columns: 4fr 8fr; }
.grid-3-9 { grid-template-columns: 3fr 9fr; }

/* ---------- typography ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
  text-transform: uppercase;
}
.title-lg {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: .01em;
  color: var(--ivory);
}
.title-md {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  line-height: 1.3;
  color: var(--ivory);
}
.title-sm {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--ivory);
}
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(237, 230, 214, .90);
}
.prose p { margin: 0 0 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--silver);
}
.num {
  font-family: var(--font-mono);
  font-size: 1.25em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

/* ---------- cards ---------- */
.card {
  position: relative;
  padding: 22px;
  background: linear-gradient(180deg, rgba(69, 79, 76, .34), rgba(12, 26, 22, .62));
  border: 1px solid var(--line-faint);
  transition:
    border-color var(--t-frame) var(--ease),
    background var(--t-soft) var(--ease);
}
.card:hover {
  border-color: var(--gold);
  background: linear-gradient(180deg, rgba(63, 90, 69, .42), rgba(12, 26, 22, .72));
}

.paper-card {
  position: relative;
  padding: 22px 22px 20px;
  background: var(--paper);
  color: #16241F;
  border: 1px solid var(--paper-shadow);
  box-shadow:
    4px 4px 0 0 rgba(218, 210, 190, .26),
    8px 8px 0 -2px rgba(160, 124, 51, .16);
}
.paper-card .title-sm { color: #0C1A16; }
.paper-card .meta { color: #4B5A55; }
.paper-card .prose { color: #22322C; }
.paper-card .num { color: #8A4A1C; }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-bright);
  border: 1px solid rgba(160, 124, 51, .5);
  background: rgba(160, 124, 51, .10);
}
.tag-moss {
  color: #A9C6B1;
  border-color: rgba(63, 90, 69, .92);
  background: rgba(63, 90, 69, .35);
}
.tag-amber {
  color: #E9A866;
  border-color: rgba(208, 122, 42, .60);
  background: rgba(208, 122, 42, .14);
}

/* ---------- rules & diagonals ---------- */
.rule {
  height: 1px;
  border: 0;
  margin: 28px 0;
  background: var(--line-faint);
}
.rule-gold {
  height: 2px;
  border: 0;
  margin: 28px 0;
  background: linear-gradient(90deg, var(--gold), rgba(160, 124, 51, 0));
}

.diagonal {
  width: clamp(90px, 16%, 150px);
  height: 6px;
  margin-bottom: 18px;
  transform: skewX(-6deg);
  background: linear-gradient(90deg, rgba(160, 124, 51, .55), rgba(208, 122, 42, .28));
}
.diagonal-flat {
  transform: none;
  background: linear-gradient(90deg, rgba(63, 90, 69, .85), rgba(63, 90, 69, .18));
}
.diagonal-plus {
  transform: skewX(6deg);
  background: linear-gradient(90deg, rgba(155, 166, 163, .60), rgba(155, 166, 163, .10));
}

/* ---------- media containers ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-gold);
  background: linear-gradient(135deg, var(--stone), var(--night));
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.03);
  transition: filter var(--t-soft) var(--ease);
}
.media:hover img { filter: saturate(1) contrast(1.05); }
.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-3x4 { aspect-ratio: 3 / 4; }

.media-frame {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line-gold);
  background: rgba(6, 15, 12, .52);
}
.media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--silver);
}

/* ---------- breadcrumb ---------- */
.breadcrumb { padding: 4px 0 0; }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--silver);
}
.breadcrumb-list li {
  display: inline-flex;
  align-items: center;
}
.breadcrumb-list li::after {
  content: "/";
  margin-left: 8px;
  color: rgba(155, 166, 163, .45);
}
.breadcrumb-list li:last-child::after { content: ""; margin-left: 0; }
.breadcrumb-link {
  color: var(--silver);
  transition: color var(--t-frame) var(--ease);
}
.breadcrumb-link:hover { color: var(--gold-bright); }
.breadcrumb-current { color: var(--ivory); }

/* ---------- gloss tooltip ---------- */
.gloss {
  color: var(--ivory);
  border-bottom: 1px dashed var(--silver);
  cursor: help;
  transition:
    border-color var(--t-frame) var(--ease),
    color var(--t-frame) var(--ease);
}
.gloss:hover,
.gloss:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.gloss-tip {
  position: fixed;
  z-index: 110;
  max-width: min(300px, 80vw);
  padding: 10px 12px;
  background: var(--paper);
  color: #16241F;
  border-left: 3px solid var(--clay);
  box-shadow: 3px 3px 0 rgba(6, 15, 12, .45);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.62;
  letter-spacing: .02em;
}

/* ---------- to top ---------- */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 100;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold-bright);
  background: rgba(6, 15, 12, .94);
  border: 1px solid var(--line-gold);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition:
    opacity var(--t-soft) var(--ease),
    transform var(--t-soft) var(--ease),
    visibility var(--t-soft),
    border-color var(--t-frame) var(--ease),
    color var(--t-frame) var(--ease);
}
.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover {
  color: var(--ivory);
  border-color: var(--gold-bright);
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(30px, 4vw, 54px) var(--frame-pad) clamp(24px, 3vw, 36px);
  background: linear-gradient(180deg, rgba(6, 15, 12, .60), rgba(6, 15, 12, .96));
  border-top: 1px solid var(--line-gold);
  color: var(--silver);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(80px, 18%, 170px);
  height: 2px;
  background: var(--gold-bright);
}

.footer-frame {
  display: grid;
  grid-template-columns: minmax(170px, .85fr) minmax(0, 2.4fr);
  gap: clamp(22px, 3vw, 48px);
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ivory);
}
.footer-brand-meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .06em;
  color: var(--silver);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.footer-col { display: flex; flex-direction: column; }
.footer-col-title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-bright);
  text-transform: uppercase;
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-link,
.footer-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--silver);
  transition:
    color var(--t-soft) var(--ease),
    padding-left var(--t-soft) var(--ease);
}
.footer-link:hover {
  color: var(--ivory);
  padding-left: 4px;
}
.footer-link[aria-current="page"] { color: var(--gold-bright); }
.footer-text { word-break: break-all; }

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-top: 20px;
  margin-top: 6px;
  border-top: 1px solid var(--line-faint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}
.footer-legal-line { display: inline-flex; align-items: baseline; }
.legal-label {
  margin-right: 8px;
  color: var(--gold);
  letter-spacing: .12em;
}

.footer-note {
  max-width: var(--max-w);
  margin: 20px auto 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(155, 166, 163, .74);
}
.footer-year {
  max-width: var(--max-w);
  margin: 10px auto 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(155, 166, 163, .62);
}

/* ---------- responsive ---------- */
@media (max-width: 1180px) and (min-width: 901px) {
  :root {
    --rail-w: 200px;
    --frame-pad: clamp(18px, 3vw, 40px);
  }
  .brand-name { font-size: 17px; }
  .nav-link { font-size: 14px; }
}

@media (max-width: 900px) {
  :root { --frame-pad: clamp(16px, 4vw, 28px); }

  body { padding-left: 0; }

  .site-header {
    position: sticky;
    top: 0;
    left: auto;
    bottom: auto;
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 12px var(--frame-pad);
    border-right: 0;
    border-bottom: 1px solid var(--line-gold);
    box-shadow: 0 10px 24px -20px rgba(0, 0, 0, .95);
    overflow: visible;
  }

  .rail-brand {
    flex: 1 1 auto;
    padding-bottom: 0;
    border-bottom: 0;
  }
  .brand-name { font-size: 17px; }
  .brand-sub { font-size: 10px; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .12em;
    color: var(--gold-bright);
    border: 1px solid var(--line-gold);
    background: rgba(160, 124, 51, .08);
    transition:
      border-color var(--t-frame) var(--ease),
      color var(--t-frame) var(--ease);
  }
  .nav-toggle:hover {
    color: var(--ivory);
    border-color: var(--gold-bright);
  }
  .site-header[data-open] .nav-toggle-lines i:first-child {
    transform: rotate(45deg) translateY(2px);
  }
  .site-header[data-open] .nav-toggle-lines i:last-child {
    transform: rotate(-45deg) translateY(-2px);
  }

  .site-nav {
    display: none;
    flex: 0 0 100%;
    order: 3;
    padding: 14px 0 4px;
    margin-top: 4px;
    border-top: 1px solid var(--line-faint);
  }
  .site-header[data-open] .site-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .nav-link { font-size: 16px; padding: 10px 12px; }
  .nav-caption { padding-left: 0; }

  .rail-foot { display: none; }

  .footer-frame { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid-5-7,
  .grid-4-8,
  .grid-3-9 { grid-template-columns: 1fr; }

  .to-top { right: 14px; bottom: 16px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .footer-cols { grid-template-columns: 1fr; gap: 20px; }
  .footer-legal { flex-direction: column; gap: 8px; }
  .title-lg { font-size: clamp(1.85rem, 7vw, 2.4rem); }
  .media-frame { padding: 7px; }
}

@media (max-width: 380px) {
  .brand-sub { display: none; }
  .nav-toggle-label { display: none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
  .skip-link { transform: none; }
  .to-top { transform: none; }
}