/* ==========================================================================
   九博国际 · 共享样式表 /assets/site.css
   深墨蓝底 + 沙金索引 + 青瓷绿状态，非对称编辑部外壳
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 168px;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

:root {
  /* 底色阶 */
  --ink-900: #0E1A2B;
  --ink-800: #16283D;
  --ink-700: #24395A;
  /* 强调色 */
  --gold: #C9963F;
  --gold-soft: #E5C486;
  --celadon: #2F7F6E;
  --celadon-bright: #6FBFAA;
  --wine: #6B2233;
  --indigo: #4A3A78;
  /* 文本与线 */
  --paper: #F5F1E8;
  --muted: #A9B4C4;
  --rule: #33455F;

  --bg: var(--ink-900);
  --surface: var(--ink-800);

  --wrap-max: 1240px;
  --index-w: 88px;
  --gap: clamp(18px, 2.6vw, 40px);
  --cut: 22px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 220ms;
  --dur-slow: 480ms;
}

/* ---------------------------------------------------------------
   中文排版基线
   --------------------------------------------------------------- */
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--paper);
  background-color: var(--ink-900);
  background-image:
    repeating-linear-gradient(90deg, rgba(51, 69, 95, 0.16) 0 1px, transparent 1px 88px),
    linear-gradient(180deg, #0d1826 0%, #0E1A2B 40%, #0b1524 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.22;
  text-align: left;
  text-wrap: balance;
}

h1 { font-size: clamp(2.25rem, 4.6vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.1vw, 2.5rem); }
h3 { font-size: clamp(1.375rem, 2.1vw, 1.75rem); }
h4 { font-size: clamp(1.125rem, 1.5vw, 1.25rem); }

::selection { background: var(--gold); color: #1a1204; }

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

/* ---------------------------------------------------------------
   布局容器
   --------------------------------------------------------------- */
.wrap {
  width: min(var(--wrap-max), calc(100% - 48px));
  margin-inline: auto;
}

.shell {
  display: grid;
  grid-template-columns: var(--index-w) minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

.index-rail {
  position: sticky;
  top: 168px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
  line-height: 1.4;
}

.index-rail__num {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--gold-soft);
  letter-spacing: 0.04em;
}

.index-rail::after {
  content: "";
  display: block;
  width: 1px;
  height: 56px;
  margin-top: 14px;
  background: linear-gradient(180deg, var(--gold), transparent);
}

/* ---------------------------------------------------------------
   跳转链接
   --------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: #1a1204;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 12px; }

/* ---------------------------------------------------------------
   页头
   --------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--ink-900);
  border-bottom: 1px solid var(--rule);
}

.header-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(118deg, #0E1A2B 0%, #16283D 58%, #1c3350 100%);
  border-bottom: 1px solid var(--rule);
}

.header-band::after {
  content: "";
  position: absolute;
  right: -4%;
  top: -60%;
  width: 44%;
  height: 220%;
  background: linear-gradient(180deg, rgba(47, 127, 110, 0.30), rgba(47, 127, 110, 0));
  clip-path: polygon(40% 0, 100% 0, 60% 100%, 0 100%);
  pointer-events: none;
}

.header-band::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 46%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold) 0 40%, var(--celadon) 40% 68%, transparent 68%);
  pointer-events: none;
}

.header-band__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 28px);
  min-height: 78px;
  padding-block: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--paper);
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #1a1204;
  background: linear-gradient(140deg, var(--gold-soft), var(--gold));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.brand__text { display: block; min-width: 0; }

.brand__name {
  display: block;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.3;
}

.brand__tagline {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  line-height: 1.5;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 20px);
  margin-left: auto;
}

.link-quiet {
  position: relative;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-bottom: 3px;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.link-quiet::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.link-quiet:hover { color: var(--gold-soft); }
.link-quiet:hover::after { transform: scaleX(1); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 11px 20px;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover { background: rgba(201, 150, 63, 0.16); color: var(--paper); }
.btn:active { transform: translateY(1px); }

.btn--gold {
  background: linear-gradient(140deg, var(--gold-soft), var(--gold));
  border-color: transparent;
  color: #20160a;
  font-weight: 700;
}

.btn--gold:hover { background: linear-gradient(140deg, #f0d49b, var(--gold-soft)); color: #20160a; }

.btn--ghost { border-color: var(--rule); color: var(--paper); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold-soft); background: rgba(201, 150, 63, 0.10); }

.btn--celadon { border-color: var(--celadon-bright); color: var(--celadon-bright); }
.btn--celadon:hover { background: rgba(47, 127, 110, 0.24); color: var(--paper); }

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(36, 57, 90, 0.4);
  border: 1px solid var(--rule);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.nav-toggle:hover { border-color: var(--gold); color: var(--gold-soft); }

.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: var(--gold-soft);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle.is-open .nav-toggle__bars i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle.is-open .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .nav-toggle__bars i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* 导航带 */
.site-nav {
  visibility: visible;
  background: var(--ink-800);
  border-top: 1px solid var(--rule);
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 18px;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__list a .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 8px;
  height: 1px;
  background: var(--gold-soft);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__list a:hover { color: var(--paper); background: rgba(36, 57, 90, 0.55); }
.site-nav__list a:hover::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] {
  color: var(--gold-soft);
  background: rgba(201, 150, 63, 0.12);
}

.site-nav__list a[aria-current="page"]::after { transform: scaleX(1); background: var(--gold); }
.site-nav__list a[aria-current="page"] .idx { color: var(--celadon-bright); }

.site-nav__note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-block: 14px;
  white-space: nowrap;
}

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  z-index: 95;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--celadon-bright));
  transition: width 90ms linear;
}

/* ---------------------------------------------------------------
   通用排版组件
   --------------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.prose {
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.02em;
}

.prose p { max-width: 34em; margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--paper); background: rgba(201, 150, 63, 0.16); }

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.78;
  max-width: 34em;
  color: var(--paper);
}

.mono-inline {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rule);
}

.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--gold-soft); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: clamp(22px, 3vw, 36px);
}

.section-head__title { font-size: clamp(1.5rem, 2.6vw, 2rem); margin: 0; }

.section-head__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0;
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: clamp(24px, 4vw, 44px) 0;
}

.rule--diagonal {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--gold) 30%, var(--celadon) 68%, transparent);
}

.accent-strip {
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0 22%, var(--celadon) 22% 38%, var(--indigo) 38% 52%, transparent 52%);
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------------------------------------------------------------
   面板与标签
   --------------------------------------------------------------- */
.panel {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--rule);
  padding: clamp(20px, 2.6vw, 32px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.panel:hover { border-color: rgba(229, 196, 134, 0.6); background: var(--ink-700); }

.panel--wine { background: linear-gradient(152deg, #6B2233, #35121c 82%); border-color: rgba(229, 196, 134, 0.34); }
.panel--wine:hover { background: linear-gradient(152deg, #7c2939, #3d1420 82%); }

.panel--indigo { background: linear-gradient(152deg, #4A3A78, #241f42 82%); border-color: rgba(229, 196, 134, 0.28); }
.panel--indigo:hover { background: linear-gradient(152deg, #56448b, #2a2450 82%); }

.panel--celadon { background: linear-gradient(152deg, #1d4a41, #16283D 86%); border-color: rgba(111, 191, 170, 0.42); }
.panel--celadon:hover { background: linear-gradient(152deg, #235a4f, #1a3049 86%); }

.panel--gold { border-color: var(--gold); }

.panel__title { font-size: 1.25rem; margin-bottom: 0.5em; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--rule);
  background: rgba(36, 57, 90, 0.42);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  white-space: nowrap;
}

.tag--gold { color: var(--gold-soft); border-color: rgba(201, 150, 63, 0.55); background: rgba(201, 150, 63, 0.14); }
.tag--celadon { color: var(--celadon-bright); border-color: rgba(111, 191, 170, 0.5); background: rgba(47, 127, 110, 0.2); }
.tag--wine { color: #EBC5CE; border-color: rgba(160, 60, 82, 0.8); background: rgba(107, 34, 51, 0.5); }
.tag--indigo { color: #CBC0F2; border-color: rgba(122, 100, 190, 0.8); background: rgba(74, 58, 120, 0.5); }

/* ---------------------------------------------------------------
   网格
   --------------------------------------------------------------- */
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------------------------------------------------------------
   图片容器（页面阶段放置占位图）
   --------------------------------------------------------------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--rule);
  background: linear-gradient(140deg, var(--ink-800), #0c1523);
}

.media::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media img,
.media video,
.media svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide::before { padding-top: 42%; }
.media--square::before { padding-top: 100%; }
.media--tall::before { padding-top: 132%; }

.media--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.media__label {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 12px;
  background: rgba(14, 26, 43, 0.88);
  border-top: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------------------------------------------------------------
   可展开索引组
   --------------------------------------------------------------- */
.expand-list { border-top: 1px solid var(--rule); }

.expand { border-bottom: 1px solid var(--rule); }

.expand__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: transparent;
  border: 0;
  text-align: left;
  color: var(--paper);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.expand__head:hover { background: rgba(36, 57, 90, 0.55); color: var(--gold-soft); }
.expand__head:focus-visible { outline: 2px solid var(--gold-soft); outline-offset: -3px; }

.expand__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.expand__caret {
  flex: none;
  margin-left: auto;
  width: 11px;
  height: 11px;
  border-right: 1px solid var(--celadon-bright);
  border-bottom: 1px solid var(--celadon-bright);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.expand.is-open .expand__head { background: rgba(47, 127, 110, 0.16); color: var(--gold-soft); }
.expand.is-open .expand__caret { transform: rotate(-135deg); }

.expand__panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.expand.is-open .expand__panel { grid-template-rows: 1fr; visibility: visible; }

.expand__panel > div { overflow: hidden; }

.expand__body {
  padding: 2px 18px 20px 60px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.expand__body p { max-width: 34em; margin-bottom: 0.9em; }
.expand__body p:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------
   显现动效（无 JS 时内容始终可见）
   --------------------------------------------------------------- */
[data-reveal] {
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}

html.js-ready [data-reveal] { opacity: 0; transform: translateY(14px); }
html.js-ready [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------------------------------------------------------------
   页脚
   --------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-900);
  border-top: 1px solid var(--rule);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0 55%, var(--celadon) 55% 82%, transparent 82%);
}

.footer-main {
  padding: clamp(40px, 6vw, 72px) 0 clamp(28px, 4vw, 48px);
  background: linear-gradient(158deg, #16283D 0%, #101d2f 55%, #0E1A2B 100%);
}

.footer-main__grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) minmax(130px, 0.8fr) minmax(130px, 0.8fr) minmax(220px, 1.3fr);
  gap: clamp(22px, 3vw, 48px);
}

.footer-identity__brand {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.footer-identity__tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-top: 6px;
}

.footer-identity__summary {
  max-width: 26em;
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.footer-identity .btn { margin-top: 20px; }

.footer-group__title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.footer-list { list-style: none; margin: 0; padding: 0; }
.footer-list li + li { margin-top: 10px; }

.footer-list a {
  position: relative;
  display: inline-block;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.03em;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-list a::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 0.86em;
  width: 8px;
  height: 1px;
  background: var(--gold);
  opacity: 0;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-list a:hover { color: var(--paper); transform: translateX(4px); }
.footer-list a:hover::before { opacity: 1; }

.footer-contact { list-style: none; margin: 0; padding: 0; }
.footer-contact li { display: grid; gap: 2px; padding: 8px 0; border-bottom: 1px dashed rgba(51, 69, 95, 0.8); }
.footer-contact li:last-child { border-bottom: 0; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--celadon-bright);
}

.footer-contact__value {
  color: var(--paper);
  font-size: 15px;
  line-height: 1.7;
  word-break: break-word;
}

.footer-note {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 30em;
}

.footer-base {
  border-top: 1px solid var(--rule);
  background: #0a1320;
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 18px;
}

.footer-base__copy {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-base__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
}

.footer-base__links a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-base__links a:hover { color: var(--gold-soft); border-bottom-color: var(--gold); }

/* ---------------------------------------------------------------
   响应式
   --------------------------------------------------------------- */
@media (max-width: 1080px) {
  .site-nav__note { display: none; }
  .footer-main__grid { grid-template-columns: minmax(220px, 1.4fr) repeat(2, minmax(130px, 1fr)); }
  .footer-group--contact { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .index-rail { top: 150px; font-size: 12px; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 140px; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }

  .site-nav[data-open="true"] {
    max-height: min(72vh, 560px);
    overflow-y: auto;
    visibility: visible;
  }

  .site-nav .wrap { display: block; width: 100%; }

  .site-nav__list { flex-direction: column; gap: 0; }

  .site-nav__list a {
    padding: 14px 16px;
    border-bottom: 1px solid var(--rule);
    font-size: 16px;
  }

  .site-nav__list a::after { display: none; }

  .site-nav__list a[aria-current="page"] { border-left: 3px solid var(--gold); padding-left: 13px; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }

  .index-rail {
    position: static;
    display: flex;
    align-items: baseline;
    gap: 12px;
  }

  .index-rail::after { display: none; }
  .index-rail__num { font-size: 22px; }
}

@media (max-width: 760px) {
  .header-band__inner { min-height: 66px; }
  .header-tools .link-quiet { display: none; }
  .footer-base__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; }

  .wrap { width: calc(100% - 32px); }

  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-main__grid { grid-template-columns: minmax(0, 1fr); }

  .brand__tagline { display: none; }
  .brand__name { font-size: 18px; }

  .expand__body { padding-left: 18px; }
}

@media (max-width: 480px) {
  .header-tools .btn { display: none; }
  .footer-identity .btn { width: 100%; justify-content: center; }
}

/* ---------------------------------------------------------------
   无障碍与动效偏好
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js-ready [data-reveal] { opacity: 1 !important; transform: none !important; }
  .scroll-progress__bar { transition: none; }
  .site-nav { transition: none; }
  .footer-list a:hover { transform: none; }
}