/* ==========================================================================
   黄金城游艺 · 共享站点样式 /assets/site.css
   设计逻辑：夜色金库 · 目录档案 —— 极细雾金边界、错位分栏、等宽索引
   ========================================================================== */

/* 1. Reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 124px;
}
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }
[hidden] { display: none !important; }

/* 2. Design tokens -------------------------------------------------------- */
:root {
  --ink: #17140F;
  --ink-deep: #100D09;
  --night: #0E1A2B;
  --amber: #D6A24A;
  --amber-deep: #B4832F;
  --gold: #F0D08A;
  --cinnabar: #B64033;
  --sand: #E7DFD2;
  --teal: #10312D;
  --wine: #5B202B;
  --indigo: #251C3B;
  --mist: #A89572;
  --text: #EFE7D8;
  --text-dim: #B9AC96;
  --line: rgba(168, 149, 114, .30);
  --line-soft: rgba(168, 149, 114, .16);
  --line-strong: rgba(214, 162, 74, .52);
  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", ui-monospace, monospace;
  --ease: cubic-bezier(.2, .7, .3, 1);
  --radius: 2px;
}

/* 3. Base typography & page canvas ---------------------------------------- */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background:
    radial-gradient(1100px 620px at 10% -8%, rgba(37, 28, 59, .70), transparent 62%),
    radial-gradient(860px 520px at 94% 4%, rgba(16, 49, 45, .50), transparent 60%),
    linear-gradient(180deg, #0B111D 0%, var(--ink) 46%, #14110C 100%);
  color: var(--text);
  font-family: var(--sans);
  font-size: clamp(15px, .35vw + 14px, 17px);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
main { display: block; flex: 1 0 auto; }
#main-content { scroll-margin-top: 124px; outline: none; }
::selection { background: rgba(214, 162, 74, .34); color: #FFF7E6; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 800; line-height: 1.24; letter-spacing: .01em; color: var(--sand); }
strong { color: var(--gold); font-weight: 600; }
small { font-size: .82em; }
code, kbd, samp { font-family: var(--mono); font-size: .92em; }

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

/* 4. Utilities ------------------------------------------------------------ */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.mono { font-family: var(--mono); letter-spacing: .04em; font-variant-numeric: tabular-nums; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute;
  top: 6px; left: 6px;
  z-index: 200;
  padding: 10px 18px;
  background: linear-gradient(135deg, var(--gold), var(--amber));
  color: #16100A;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  border: 1px solid var(--amber-deep);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px -14px rgba(0, 0, 0, .9);
  transform: translateY(-180%);
  transition: transform .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* 5. Header — vault command spine ----------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(14, 26, 43, .97) 0%, rgba(23, 20, 15, .99) 100%);
  border-bottom: 1px solid var(--line);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(102deg, transparent 0 63.4%, rgba(214, 162, 74, .13) 63.4% 63.75%, transparent 63.75%),
    linear-gradient(102deg, rgba(37, 28, 59, .85) 0 24%, transparent 24%);
}

/* 5.1 脊带 */
.header-spine {
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(37, 28, 59, .55), rgba(14, 26, 43, .18) 56%, transparent 100%);
}
.spine-inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2.4vw, 28px);
  min-height: 46px;
  padding-block: 7px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border: 1px solid var(--line-strong);
  transform: rotate(45deg);
  transition: transform .42s var(--ease), border-color .28s ease, box-shadow .28s ease;
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(214, 162, 74, .42);
}
.brand-mark-core {
  width: 6px; height: 6px;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(214, 162, 74, .75);
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  transform: rotate(135deg);
  border-color: var(--gold);
  box-shadow: 0 0 18px -4px rgba(214, 162, 74, .65);
}
.brand-words { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .16em;
  color: var(--gold);
}
.brand-line {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .05em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.spine-note {
  margin-left: auto;
  max-width: 34ch;
  font-size: 12.5px;
  color: var(--text-dim);
  letter-spacing: .02em;
}
.spine-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid rgba(214, 162, 74, .34);
  background: rgba(214, 162, 74, .07);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--amber);
  white-space: nowrap;
}
.status-text { display: inline-block; }
.status-dot {
  width: 5px; height: 5px;
  flex: none;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(214, 162, 74, .16);
  animation: status-pulse 3.6s ease-in-out infinite;
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(214, 162, 74, .14); }
  50% { box-shadow: 0 0 0 5px rgba(214, 162, 74, .05); }
}

/* 5.2 命令栏 */
.header-bar { position: relative; overflow: hidden; background: rgba(23, 20, 15, .42); }
.header-bar::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 22%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: .72;
  pointer-events: none;
  animation: vault-sheen 12s linear infinite;
}
@keyframes vault-sheen {
  0% { transform: translateX(-110%); }
  100% { transform: translateX(560%); }
}
.bar-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(6px, 1.4vw, 18px);
  min-height: 56px;
  padding-block: 6px;
}
.bar-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}
.bar-label::before { content: ""; width: 14px; height: 1px; background: var(--amber); }

.site-nav { flex: 1 1 auto; min-width: 0; }
.nav-list { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 11px;
  border-radius: var(--radius);
  color: var(--sand);
  font-size: 14.5px;
  letter-spacing: .04em;
  transition: color .18s ease, background-color .18s ease;
}
.nav-index {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--mist);
  transition: color .18s ease;
}
.nav-text { white-space: nowrap; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 11px; right: 11px; bottom: 4px;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}
.nav-link:hover { color: var(--gold); background: rgba(214, 162, 74, .07); }
.nav-link:hover .nav-index { color: var(--amber); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--gold); background: rgba(214, 162, 74, .1); }
.nav-link[aria-current="page"] .nav-index { color: var(--gold); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--gold), rgba(214, 162, 74, .12));
}

/* 5.3 按钮基类 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s var(--ease), box-shadow .18s ease;
}
.btn--primary {
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  border-color: rgba(240, 208, 138, .55);
  color: #1A1309;
  box-shadow: 0 8px 22px -14px rgba(214, 162, 74, .95);
}
.btn--primary:hover {
  background: linear-gradient(135deg, var(--gold), var(--amber));
  transform: translateY(-1px);
  box-shadow: 0 12px 26px -14px rgba(214, 162, 74, 1);
}
.btn--ghost {
  border-color: var(--line-strong);
  background: rgba(214, 162, 74, .05);
  color: var(--gold);
}
.btn--ghost:hover { background: rgba(214, 162, 74, .15); border-color: var(--gold); }
.btn--quiet { border-color: rgba(168, 149, 114, .42); color: var(--sand); }
.btn--quiet:hover { border-color: var(--line-strong); color: var(--gold); background: rgba(214, 162, 74, .07); }
.header-cta { flex: none; padding: 9px 18px; font-size: 13.5px; }
.nav-cta { width: 100%; }

/* 5.4 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  background: rgba(214, 162, 74, .07);
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  border-radius: var(--radius);
  transition: background-color .18s ease, border-color .18s ease;
}
.nav-toggle:hover { background: rgba(214, 162, 74, .16); border-color: var(--gold); }
.nav-toggle-bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle-bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }
.nav-toggle-label { line-height: 1; }

.nav-foot { display: none; }
.nav-foot-note { font-size: 12.5px; line-height: 1.7; color: var(--text-dim); }

/* 6. Footer — archive drawer bottom --------------------------------------- */
.site-footer {
  position: relative;
  flex: 0 0 auto;
  margin-top: clamp(40px, 6vw, 88px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #251C3B 0%, #14141A 20%, var(--ink) 58%, var(--ink-deep) 100%);
  color: var(--sand);
}
.footer-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(214, 162, 74, .72) 22%, rgba(182, 64, 51, .62) 62%, transparent);
}
.footer-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(34px, 5vw, 64px) clamp(18px, 3vw, 28px);
}
.footer-lead { display: flex; flex-direction: column; gap: 16px; max-width: 46ch; }
.brand-footer .brand-name { font-size: 1.15rem; }
.footer-note { font-size: 14.5px; line-height: 1.78; color: var(--text-dim); }
.footer-plate {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(16, 49, 45, .55), rgba(23, 20, 15, .62));
}
.plate-key {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-mail {
  font-family: var(--mono);
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--gold);
  word-break: break-all;
}
.footer-stamp {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 36px);
  align-content: start;
}
.footer-col-title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--amber);
}
.footer-links { display: flex; flex-direction: column; gap: 2px; }
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 0;
  font-size: 14.5px;
  color: var(--sand);
  transition: color .18s ease, transform .18s var(--ease);
}
.footer-link::before {
  content: "";
  width: 6px; height: 1px;
  flex: none;
  background: var(--mist);
  transition: width .18s ease, background-color .18s ease;
}
.footer-link:hover { color: var(--gold); transform: translateX(2px); }
.footer-link:hover::before { width: 13px; background: var(--amber); }
.footer-meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  margin-top: clamp(22px, 3.5vw, 44px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.footer-contact { font-size: 13.5px; line-height: 1.7; color: var(--text-dim); }
.footer-contact .mono { color: var(--sand); }
.footer-legal {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* 7. Shared content components ------------------------------------------- */
/* 7.1 面包屑 */
.breadcrumb { padding-block: 18px 0; }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}
.breadcrumb-list li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb-list li + li::before { content: "/"; color: rgba(168, 149, 114, .45); }
.breadcrumb-link { color: var(--text-dim); transition: color .18s ease; }
.breadcrumb-link:hover { color: var(--gold); }
.breadcrumb-list [aria-current="page"] { color: var(--amber); }

/* 7.2 分区与标题 */
.section { position: relative; padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(24px, 4vw, 48px); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 32px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--amber);
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: linear-gradient(90deg, var(--amber), transparent); }
.section-title { font-size: clamp(1.6rem, 3.2vw, 2.6rem); color: var(--sand); }
.section-title em { font-style: normal; color: var(--gold); }
.section-note { max-width: 46ch; font-size: 14.5px; line-height: 1.78; color: var(--text-dim); }
.rule { height: 1px; margin-block: clamp(20px, 3vw, 36px); background: linear-gradient(90deg, rgba(214, 162, 74, .5), rgba(168, 149, 114, .12) 62%, transparent); }

/* 7.3 网格 */
.grid { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 258px), 1fr)); }
.grid--split { grid-template-columns: minmax(0, 240px) minmax(0, 1fr); align-items: start; }

/* 7.4 面板 / 提示 / 标签 */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, 0) 70%);
  box-shadow: 0 20px 44px -36px rgba(0, 0, 0, 1);
}
.panel--teal { background: linear-gradient(150deg, rgba(16, 49, 45, .88), rgba(23, 20, 15, .9)); border-color: rgba(214, 162, 74, .3); }
.panel--wine { background: linear-gradient(150deg, rgba(91, 32, 43, .86), rgba(23, 20, 15, .92)); border-color: rgba(214, 162, 74, .26); }
.panel--night { background: linear-gradient(150deg, rgba(14, 26, 43, .92), rgba(37, 28, 59, .7)); border-color: rgba(214, 162, 74, .22); }
.panel-title { margin-bottom: .55em; font-size: 1.1rem; color: var(--gold); letter-spacing: .02em; }
.panel-text { font-size: 14.5px; line-height: 1.78; color: var(--text-dim); }

.notice {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  background: rgba(214, 162, 74, .06);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}
.notice--alert { border-left-color: var(--cinnabar); background: rgba(182, 64, 51, .11); }

.plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 9px;
  border: 1px solid rgba(168, 149, 114, .42);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid rgba(214, 162, 74, .36);
  background: rgba(214, 162, 74, .14);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--gold);
}
.badge--alert { border-color: rgba(182, 64, 51, .62); background: rgba(182, 64, 51, .2); color: #F3B9AE; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--text-dim);
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.chip:hover { border-color: var(--line-strong); color: var(--gold); }
.chip[aria-pressed="true"] { border-color: var(--line-strong); background: rgba(214, 162, 74, .16); color: var(--gold); }

/* 7.5 索引列表（配合 data-spy） */
.index-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}
.index-list-title {
  padding-bottom: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}
.index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 2px;
  font-size: 14px;
  color: var(--text-dim);
  transition: color .18s ease, padding-left .18s var(--ease);
}
.index-link:hover { color: var(--gold); padding-left: 4px; }
.index-link[aria-current="true"] { color: var(--gold); }
.index-link[aria-current="true"] .nav-index { color: var(--amber); }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--amber);
  transition: color .18s ease;
}
.arrow-link::after { content: "→"; transition: transform .18s var(--ease); }
.arrow-link:hover { color: var(--gold); }
.arrow-link:hover::after { transform: translateX(3px); }

/* 7.6 正文容器 */
.prose {
  max-width: 68ch;
  font-size: clamp(15px, .35vw + 14px, 17px);
  line-height: 1.86;
  color: var(--text);
}
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 2em; font-size: clamp(1.35rem, 2.4vw, 1.85rem); color: var(--gold); }
.prose h3 { margin-top: 1.6em; font-size: 1.14rem; color: var(--sand); }
.prose a { color: var(--amber); border-bottom: 1px solid rgba(214, 162, 74, .42); }
.prose a:hover { color: var(--gold); border-bottom-color: var(--gold); }
.prose ul, .prose ol { display: grid; gap: .5em; }
.prose li { position: relative; padding-left: 18px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px; top: .78em;
  width: 6px; height: 1px;
  background: var(--amber);
}
.prose blockquote {
  padding: 14px 18px;
  border-left: 2px solid var(--line-strong);
  background: rgba(37, 28, 59, .35);
  color: var(--text-dim);
}

/* 7.7 数据表 */
.ledger-wrap { overflow-x: auto; border: 1px solid var(--line); padding-inline: clamp(10px, 2vw, 18px); }
.ledger { font-size: 14px; min-width: 520px; }
.ledger caption {
  padding: 12px 0 10px;
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}
.ledger th {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(214, 162, 74, .42);
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--sand);
  white-space: nowrap;
}
.ledger td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  color: var(--text-dim);
}
.ledger .num, .ledger .mono { font-family: var(--mono); color: var(--sand); font-variant-numeric: tabular-nums; }
.ledger tbody tr:hover td { background: rgba(214, 162, 74, .05); color: var(--text); }
.ledger tbody tr:last-child td { border-bottom: 0; }

/* 7.8 图片容器基础（页面阶段放 img 或占位） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(45deg, rgba(168, 149, 114, .07) 0 1px, transparent 1px 9px),
    linear-gradient(140deg, #1B2A2A 0%, var(--ink) 58%, var(--indigo) 100%);
}
.media img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: "";
  position: absolute;
  inset: 6px;
  z-index: 2;
  border: 1px solid rgba(214, 162, 74, .22);
  pointer-events: none;
}
.media--wide { aspect-ratio: 16 / 9; }
.media--band { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }
.media-caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--mist);
}
.media-caption::before { content: ""; width: 14px; height: 1px; flex: none; background: var(--amber); }

/* 8. JS 增强元素 ---------------------------------------------------------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s var(--ease);
}
html.js [data-reveal].is-revealed { opacity: 1; transform: none; }

.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 120;
  height: 2px;
  pointer-events: none;
  background: rgba(23, 20, 15, .4);
}
.scroll-progress-bar {
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--amber), var(--gold) 60%, var(--cinnabar));
  box-shadow: 0 0 12px rgba(214, 162, 74, .55);
}

/* 9. 断点 ---------------------------------------------------------------- */
@media (max-width: 1180px) {
  .spine-note { display: none; }
  .spine-status { margin-left: auto; }
}
@media (max-width: 1080px) {
  .nav-index { display: none; }
  .nav-link { padding: 9px 9px; font-size: 13.5px; }
  .nav-link::after { left: 9px; right: 9px; }
  .header-cta { padding: 8px 14px; font-size: 12.5px; }
  .footer-shell { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 899px) {
  html { scroll-padding-top: 150px; }
  #main-content { scroll-margin-top: 150px; }
  .spine-inner { min-height: 42px; }
  .brand-mark { width: 26px; height: 26px; }
  .brand-name { font-size: .98rem; }

  .bar-inner { gap: 0; min-height: 48px; padding-block: 5px; }
  .bar-label { order: 1; flex: 1 1 auto; padding-block: 6px; }
  .nav-toggle { display: inline-flex; order: 2; margin-left: auto; }
  .header-cta { display: none; }
  .site-nav {
    order: 3;
    flex: 1 1 100%;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height .24s var(--ease), visibility 0s linear .24s;
  }
  .site-nav[data-open] {
    max-height: min(70vh, 560px);
    overflow-y: auto;
    visibility: visible;
    transition: max-height .24s var(--ease);
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; padding: 6px 0 4px; }
  .nav-index { display: inline-block; font-size: 11px; }
  .nav-link {
    justify-content: flex-start;
    padding: 13px 8px;
    font-size: 16px;
    border-bottom: 1px solid rgba(168, 149, 114, .14);
    border-radius: 0;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(214, 162, 74, .16), transparent 78%);
  }
  .nav-link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0; top: 12px; bottom: 12px;
    width: 2px;
    background: var(--gold);
  }
  .nav-foot {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
    padding: 14px 8px 18px;
    border-top: 1px solid var(--line);
  }

  .footer-shell { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { flex-direction: column; align-items: flex-start; }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .brand-line { display: none; }
  .spine-status { padding: 3px 7px; font-size: 10px; letter-spacing: .06em; }
  .spine-status .status-dot { width: 4px; height: 4px; }
  .brand { gap: 10px; }
  .brand-mark { width: 24px; height: 24px; }
  .footer-plate { padding: 10px 12px; }
  .media--band { aspect-ratio: 16 / 9; }
  .media--tall { aspect-ratio: 1 / 1; }
  .ledger { min-width: 440px; }
}

/* 10. 动效可访问性 -------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .header-bar::after { display: none; }
  .status-dot { animation: none; }
}