/* ============================================================
   金沙平台 · 共享样式表 /assets/site.css
   设计基调：数字档案库 · 技术蓝图网格 · 金沙金 / 深墨蓝
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

button { cursor: pointer; }

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0F1B2D;
  --ink-up: #16263C;
  --rule: #24384F;
  --gold: #C9A227;
  --gold-lite: #E3C25A;
  --gold-dark: #8A6F16;
  --sand: #F5F1E8;
  --paper: #FFFFFF;
  --edge: #D8D2C4;
  --cool: #6B7A8C;
  --red: #B23A2E;

  --text-on-ink: #B9C6D4;
  --text-on-ink-strong: #E7EDF3;

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

  --shell: 1360px;
  --gutter: 64px;
  --header-h: 84px;

  --ease: cubic-bezier(.2, .7, .3, 1);
  --shadow-lift: 0 1px 0 rgba(15, 27, 45, .12);
  --shadow-soft: 0 8px 24px rgba(15, 27, 45, .08);
}

@media (max-width: 1040px) { :root { --gutter: 40px; } }
@media (max-width: 680px)  { :root { --gutter: 20px; --header-h: 56px; } }

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--sand);
  background-image: radial-gradient(rgba(15, 27, 45, .045) 1px, transparent 1px);
  background-size: 16px 16px;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: .01em;
}

h1 { font-size: clamp(34px, 5vw, 68px); font-weight: 700; }
h2 { font-size: clamp(24px, 2.6vw, 34px); }
h3 { font-size: clamp(19px, 1.8vw, 22px); }

p { max-width: 72ch; }

.num {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  letter-spacing: .01em;
  margin-inline: .1em;
}

.u-mono { font-family: var(--font-mono); letter-spacing: .02em; }

.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;
}

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

.zone--sand :focus-visible,
.zone--paper :focus-visible,
:root:not(.dark) .prose :focus-visible { outline-color: var(--gold-dark); }

::selection { background: var(--gold); color: var(--ink); }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  border-radius: 2px;
  transition: top .15s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 4. 容器与分区 ---------- */
.shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.zone { padding: 80px 0; }
.zone--sand { background-color: var(--sand); }
.zone--paper { background-color: var(--paper); }

.zone--ink {
  background-color: var(--ink);
  background-image: repeating-linear-gradient(115deg, rgba(245, 241, 232, .028) 0 1px, transparent 1px 7px);
  color: var(--text-on-ink);
}
.zone--ink h1,
.zone--ink h2,
.zone--ink h3,
.zone--ink h4 { color: var(--paper); }

@media (max-width: 680px) { .zone { padding: 52px 0; } }

/* ---------- 5. 网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--sidebar { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }

@media (max-width: 1040px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--sidebar { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 680px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 6. 章节标题 ---------- */
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 32px;
  align-items: end;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--edge);
  margin-bottom: 36px;
}
.zone--ink .section-head { border-bottom-color: var(--rule); }
.section-head__title { font-size: clamp(24px, 2.6vw, 34px); }
.section-head__note { font-size: 14px; color: var(--cool); max-width: 46ch; }

@media (max-width: 880px) {
  .section-head { grid-template-columns: minmax(0, 1fr); gap: 12px; align-items: start; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--gold-dark);
  margin-bottom: 12px;
}
.zone--ink .eyebrow { color: var(--gold); }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }

.note-rail {
  border-left: 2px solid var(--gold);
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cool);
}

/* ---------- 7. 正文 ---------- */
.prose { max-width: 68ch; font-size: 16px; line-height: 1.8; }
.prose h2 { margin: 1.6em 0 .6em; font-size: clamp(22px, 2.2vw, 30px); }
.prose h3 { margin: 1.4em 0 .5em; }
.prose p + p { margin-top: 1em; }
.prose ul, .prose ol { margin: 1em 0; }
.prose li { position: relative; padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: .82em;
  width: 9px; height: 1px;
  background: var(--gold);
}
.prose a {
  color: var(--gold-dark);
  border-bottom: 1px solid rgba(138, 111, 22, .45);
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.prose a:hover { color: var(--gold); border-bottom-color: var(--gold); }
.zone--ink .prose,
.zone--ink .prose p { color: var(--text-on-ink); }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  line-height: 1.4;
  transition: background-color .15s var(--ease), color .15s var(--ease),
              border-color .15s var(--ease), transform .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--gold { background: var(--gold); color: var(--ink); }
.btn--gold:hover { background: var(--gold-lite); }
.btn--ghost { border-color: var(--rule); color: var(--text-on-ink-strong); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold-lite); }
.btn--ink { background: var(--paper); border-color: var(--edge); color: var(--ink); }
.btn--ink:hover { border-color: var(--gold-dark); color: var(--gold-dark); }

/* ---------- 9. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--edge);
  border-radius: 2px;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--gold-dark);
  white-space: nowrap;
}
.tag--gold { background: rgba(201, 162, 39, .14); border-color: var(--gold); color: var(--gold-dark); }
.tag--ink { background: var(--ink-up); border-color: var(--rule); color: var(--gold-lite); }
.tag--alert { background: var(--red); border-color: var(--red); color: #F7EFE6; }

/* ---------- 10. 卡片 ---------- */
.card {
  background: var(--paper);
  border: 1px solid var(--edge);
  border-radius: 2px;
  padding: 24px;
  box-shadow: var(--shadow-lift);
}
.card--ink {
  background: var(--ink-up);
  border-color: var(--rule);
  color: var(--text-on-ink);
  box-shadow: none;
}
.card--stack { position: relative; z-index: 0; box-shadow: var(--shadow-soft); }
.card--stack::before {
  content: "";
  position: absolute;
  left: 12px; right: -12px; top: 12px; bottom: -12px;
  background: var(--sand);
  border: 1px solid var(--edge);
  z-index: -1;
}
.card__title { font-size: 20px; line-height: 1.3; }
.card__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--cool);
  margin-top: 10px;
}
.card--ink .card__meta { color: var(--gold); }

/* ---------- 11. 数据条目 ---------- */
.kpi {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--edge);
}
.zone--ink .kpi { border-top-color: var(--rule); }
.kpi__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1;
  color: var(--gold-dark);
}
.zone--ink .kpi__value { color: var(--gold); }
.kpi__label { font-size: 13.5px; color: var(--cool); }

/* ---------- 12. 矩阵表格 ---------- */
.matrix { width: 100%; font-size: 14.5px; }
.matrix__cap {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold-dark);
  padding-bottom: 12px;
}
.matrix th, .matrix td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--edge);
  text-align: left;
  vertical-align: top;
}
.matrix thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--gold-dark);
  border-bottom: 1px solid var(--gold);
}
.matrix tbody tr { transition: background-color .15s var(--ease); }
.matrix tbody tr:hover { background: rgba(201, 162, 39, .09); }
.zone--ink .matrix th,
.zone--ink .matrix td { border-bottom-color: var(--rule); }
.zone--ink .matrix tbody tr:hover { background: rgba(201, 162, 39, .12); }

/* ---------- 13. 折叠条目 ---------- */
.disclose { border-top: 1px solid var(--edge); }
.disclose:last-of-type { border-bottom: 1px solid var(--edge); }
.disclose summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.disclose summary::-webkit-details-marker { display: none; }
.disclose summary::before {
  content: "";
  flex: 0 0 auto;
  width: 0; height: 0;
  border-left: 7px solid var(--gold);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform .15s var(--ease);
}
.disclose[open] summary::before { transform: rotate(90deg); }
.disclose__body { padding: 0 0 22px 21px; font-size: 15px; color: #3B4A5C; }
.zone--ink .disclose { border-color: var(--rule); }
.zone--ink .disclose__body { color: var(--text-on-ink); }

/* ---------- 14. 面包屑 ---------- */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--cool);
}
.crumb li { display: flex; align-items: center; gap: 8px; }
.crumb li + li::before { content: "/"; color: var(--rule); }
.crumb a { transition: color .15s var(--ease); }
.crumb a:hover { color: var(--gold-dark); }
.crumb [aria-current="page"] { color: var(--gold-dark); }

/* ---------- 15. 图片容器基础规则 ---------- */
.figure {
  margin: 0;
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--edge);
  border-radius: 2px;
}
.figure__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(150deg, #DCD7CB 0%, #B9BFC7 58%, #9DA7B3 100%);
}
.figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 82% 8%, rgba(201, 162, 39, .3), transparent 62%);
  mix-blend-mode: screen;
  pointer-events: none;
}
.figure__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.06) brightness(.98);
}
.figure__cap {
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cool);
}
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--tall .figure__frame { aspect-ratio: 3 / 4; }
@media (min-width: 1041px) {
  .figure--bleed-right { margin-right: -32px; }
}

/* ---------- 16. 底纹 ---------- */
.texture-grid {
  background-image:
    linear-gradient(rgba(36, 56, 79, .6) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 56, 79, .6) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* ---------- 17. 页头命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--ink);
  background-image: repeating-linear-gradient(115deg, rgba(245, 241, 232, .028) 0 1px, transparent 1px 7px);
  color: var(--text-on-ink);
  border-bottom: 1px solid var(--rule);
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  min-height: var(--header-h);
}

.brand { display: flex; align-items: center; gap: 14px; padding: 8px 0; }
.brand__rule {
  flex: 0 0 auto;
  width: 3px;
  height: 40px;
  background: linear-gradient(180deg, var(--gold-lite), var(--gold-dark));
}
.brand__word {
  display: block;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .1em;
  color: var(--paper);
}
.brand__sub {
  display: block;
  max-height: 20px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .07em;
  color: var(--cool);
  transition: max-height .15s var(--ease), opacity .15s var(--ease);
}

.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__group { display: none; }
.site-nav__item { position: relative; }
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 12px;
  font-size: 14px;
  color: #ADBCCC;
  white-space: nowrap;
  transition: color .15s var(--ease);
}
.site-nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--gold);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 4px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .15s var(--ease);
}
.site-nav__link:hover { color: var(--paper); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--paper); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-header__meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  justify-self: end;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .03em;
  color: #9FB0C2;
  white-space: nowrap;
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.status-chip:hover { border-color: var(--gold); color: var(--paper); }
.status-chip__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .18);
}

.util-link {
  position: relative;
  padding: 4px 0;
  font-size: 13.5px;
  color: #CED8E2;
  white-space: nowrap;
  transition: color .15s var(--ease);
}
.util-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .15s var(--ease);
}
.util-link:hover { color: var(--gold-lite); }
.util-link:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  justify-self: end;
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform .15s var(--ease), opacity .15s var(--ease);
}
.nav-toggle[aria-expanded="true"] { border-color: var(--gold); color: var(--gold-lite); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.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(--gold-dark), var(--gold-lite));
  transition: width .1s linear;
}

/* 压缩态 */
.site-header[data-compact] .site-header__inner { min-height: 56px; }
.site-header[data-compact] .brand__sub { max-height: 0; opacity: 0; }
.site-header[data-compact] .brand__rule { height: 28px; }
.site-header[data-compact] .brand__word { font-size: 19px; }

/* 中等桌面：收紧导航 */
@media (max-width: 1200px) {
  .site-nav__link { padding: 10px 8px; font-size: 13px; gap: 5px; }
  .site-nav__link::after { left: 8px; right: 8px; }
  .status-chip { font-size: 11px; padding: 5px 10px; }
  .brand__word { font-size: 20px; }
}

/* ---------- 18. 移动端索引面板 ---------- */
@media (max-width: 1040px) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    min-height: 56px;
  }
  .brand__word { font-size: 18px; letter-spacing: .08em; }
  .brand__sub { display: none; }
  .brand__rule { height: 26px; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    left: 0; right: 0; top: 56px; bottom: 0;
    padding: 4px var(--gutter) 150px;
    background-color: var(--ink);
    background-image: repeating-linear-gradient(115deg, rgba(245, 241, 232, .028) 0 1px, transparent 1px 7px);
    border-top: 1px solid var(--rule);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s linear;
  }
  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .site-nav__list { display: block; }
  .site-nav__item { border-bottom: 1px solid var(--rule); }
  .site-nav__group {
    display: block;
    padding: 20px 0 2px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .22em;
    color: var(--gold);
  }
  .site-nav__link {
    display: flex;
    align-items: baseline;
    padding: 10px 0 16px;
    font-family: var(--font-serif);
    font-size: 22px;
    color: var(--sand);
  }
  .site-nav__link::after { display: none; }
  .site-nav__index { font-size: 12px; }
  .site-nav__link[aria-current="page"] { color: var(--gold-lite); }

  .site-header__meta {
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    bottom: 28px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 14px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s var(--ease), visibility .18s linear;
  }
  .site-header[data-open] .site-header__meta { opacity: 1; visibility: visible; }

  body.is-nav-open { overflow: hidden; }
}

/* ---------- 19. 页脚 ---------- */
.site-footer {
  background-color: var(--ink);
  background-image: repeating-linear-gradient(115deg, rgba(245, 241, 232, .028) 0 1px, transparent 1px 7px);
  color: var(--text-on-ink);
  border-top: 1px solid var(--rule);
}

.site-footer__inner { padding: 64px 0 28px; }

.site-footer__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.site-footer__word {
  display: block;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--paper);
}
.site-footer__note {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--cool);
}
.site-footer__legend {
  max-width: 42ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--cool);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--rule);
}
.footer-col {
  min-width: 0;
  padding: 28px 24px 34px;
  border-left: 1px solid var(--rule);
}
.footer-col:first-child { border-left: 0; padding-left: 0; }
.footer-col:last-child { padding-right: 0; }

.footer-col__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--sand);
}
.footer-col__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

.footer-col__list {
  display: grid;
  gap: 11px;
  margin-top: 16px;
  font-size: 14px;
}
.footer-col__list a {
  position: relative;
  display: inline-block;
  color: #9FB0C2;
  transition: color .15s var(--ease);
}
.footer-col__list a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .15s var(--ease);
}
.footer-col__list a:hover { color: var(--gold-lite); }
.footer-col__list a:hover::after { transform: scaleX(1); }

.footer-contact { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.footer-contact__label { font-size: 12px; color: var(--cool); }
.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--sand);
  word-break: break-all;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: var(--cool);
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.copy-btn:hover { border-color: var(--gold); color: var(--gold-lite); }
.copy-btn[data-copied] { border-color: var(--gold); color: var(--gold-lite); background: rgba(201, 162, 39, .12); }

.footer-note { font-size: 12px; line-height: 1.75; color: var(--cool); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-top: 24px;
}
.site-footer__legal,
.site-footer__addr,
.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--cool);
  max-width: none;
}
.site-footer__copy { color: #8A98A8; }

@media (max-width: 1040px) {
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col { padding: 24px 20px 30px; }
  .footer-col:nth-child(2n + 1) { border-left: 0; padding-left: 0; }
  .footer-col:nth-child(n + 3) { border-top: 1px solid var(--rule); }
}
@media (max-width: 680px) {
  .site-footer__inner { padding: 48px 0 24px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .footer-col,
  .footer-col:nth-child(2n + 1),
  .footer-col:last-child { padding: 22px 0; border-left: 0; }
  .footer-col:nth-child(n + 2) { border-top: 1px solid var(--rule); }
  .site-footer__word { font-size: 23px; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 20. 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}