/* ============================================================
   6686官方版 · 共享层 /assets/site.css
   冰蓝台账视觉系统：reset → 变量 → 排版 → 组件 → 头尾 → 响应式
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd, fieldset { margin: 0; }

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; }

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

:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; border-radius: 6px; }

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink-deep: #0B2233;
  --ink: #1E5F7A;
  --ink-soft: #A9CBDA;
  --frost: #F4F7F8;
  --snow: #FFFFFF;
  --ember: #F26A21;
  --amber: #FFB25E;
  --graphite: #1C1F22;
  --lead: #5A6570;
  --jade: #2E7D6B;
  --body-ink: #2B3036;

  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 40px);

  --r-slab: 18px;
  --r-sm: 10px;
  --r-pill: 999px;

  --h-header: 88px;
  --h-header-solid: 64px;

  --ease: cubic-bezier(.22, .68, .28, 1);

  --font-head: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: var(--font-head);
  --font-num: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.75;
  color: var(--graphite);
  background: var(--frost);
  min-height: 100%;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

strong, b { font-weight: 900; }

/* ---------- 4. 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.top-clear { padding-top: var(--h-header); }

#main-content { display: block; }

.band {
  position: relative;
  padding: clamp(48px, 7vw, 96px) 0;
}
.band--frost { background: var(--frost); }
.band--snow { background: var(--snow); }
.band--deep { background: var(--ink-deep); color: var(--snow); }
.band--deep .band-lead { color: var(--ink-soft); }
.band--deep .kicker { color: var(--ink-soft); }

.band-head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 3.5vw, 44px);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--ink);
}
.kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  flex: none;
  background: var(--ember);
}

.band-title {
  margin-top: 12px;
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1.2;
  letter-spacing: -.01em;
}

.band-lead {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--lead);
}

.tear {
  height: 0;
  border-top: 2px dashed rgba(169, 203, 218, .9);
  margin: clamp(20px, 3vw, 34px) 0;
}
.band--deep .tear { border-top-color: rgba(169, 203, 218, .34); }

.mesh {
  background-image:
    linear-gradient(rgba(169, 203, 218, .35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 203, 218, .35) 1px, transparent 1px);
  background-size: 32px 32px;
}

.grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.stack-grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}
.stack-main { min-width: 0; }
.stack-aside { min-width: 0; }

@media (min-width: 1024px) {
  .stack-grid { grid-template-columns: minmax(0, 1fr) 300px; }
  .stack-grid--flip { grid-template-columns: 280px minmax(0, 1fr); }
}

/* ---------- 5. 通用组件 ---------- */
.seq {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 26px;
  padding: 0 10px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--snow);
  background: var(--ink);
  border-radius: var(--r-pill);
}

.num {
  font-family: var(--font-num);
  font-weight: 700;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
}

.slab {
  background: var(--snow);
  border: 1px solid rgba(169, 203, 218, .75);
  border-radius: var(--r-slab);
  padding: clamp(18px, 2.4vw, 28px);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease);
}
.slab:hover {
  border-color: var(--ink-soft);
  box-shadow: 0 18px 40px -32px rgba(11, 34, 51, .9);
  transform: translateY(-2px);
}
.slab-title {
  font-weight: 900;
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink-deep);
}
.slab-text {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--lead);
}

.pin {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  background: var(--frost);
  color: var(--ink);
  border: 1px solid var(--ink-soft);
}
.pin--amber { background: rgba(255, 178, 94, .22); border-color: var(--amber); color: #8A4B0D; }
.pin--jade { background: rgba(46, 125, 107, .14); border-color: rgba(46, 125, 107, .5); color: var(--jade); }
.pin--ember { background: var(--ember); border-color: var(--ember); color: var(--snow); }

.figure {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}
.figure-num {
  font-family: var(--font-num);
  font-weight: 600;
  font-size: clamp(36px, 6.4vw, 72px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ember);
  transition: font-weight .32s var(--ease), letter-spacing .32s var(--ease);
}
.figure-num.is-in { font-weight: 900; letter-spacing: -.045em; }
.figure-unit { font-size: 17px; font-weight: 500; color: var(--lead); }
.figure-note { flex: 1 1 100%; font-size: 13px; line-height: 1.7; color: var(--lead); }
.band--deep .figure-unit,
.band--deep .figure-note { color: var(--ink-soft); }

.margin-note {
  border-left: 3px solid var(--ember);
  padding: 12px 0 12px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--lead);
}
.margin-note strong { color: var(--ink-deep); font-weight: 900; }

.rail {
  position: relative;
  padding-left: 26px;
  border-left: 2px solid var(--ink-soft);
}
.rail-node {
  position: relative;
  padding-bottom: 26px;
}
.rail-node:last-child { padding-bottom: 0; }
.rail-node::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--frost);
  border: 2px solid var(--ink-soft);
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}
.rail-node.is-in::before { background: var(--ember); border-color: var(--ember); }
.rail-time {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
}

.ledger {
  width: 100%;
  background: var(--snow);
  font-size: 15px;
}
.ledger caption {
  text-align: left;
  padding: 14px 18px;
  font-weight: 900;
  font-size: 17px;
  color: var(--ink-deep);
}
.ledger th {
  background: var(--frost);
  color: var(--lead);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--ink-soft);
}
.ledger td {
  padding: 13px 16px;
  border-bottom: 1px solid rgba(169, 203, 218, .5);
  color: var(--body-ink);
}
.ledger tbody tr { transition: background-color .18s var(--ease); }
.ledger tbody tr:hover { background: rgba(255, 178, 94, .16); }

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--ember);
  color: var(--ember);
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}

/* 图片容器 */
.plate {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-slab);
  border: 1px solid rgba(169, 203, 218, .7);
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(145deg, rgba(169, 203, 218, .55) 0%, rgba(244, 247, 248, .95) 48%, rgba(255, 178, 94, .34) 100%);
}
.plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, .35) 0%, rgba(11, 34, 51, 0) 55%);
  pointer-events: none;
}
.plate > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.plate--wide { aspect-ratio: 16 / 9; }
.plate--tall { aspect-ratio: 3 / 4; }
.plate--square { aspect-ratio: 1 / 1; }
.plate-tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: rgba(11, 34, 51, .82);
  color: var(--snow);
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

/* 可展开内容组 */
.fold {
  background: var(--snow);
  border: 1px solid var(--ink-soft);
  border-radius: var(--r-slab);
  overflow: hidden;
}
.fold + .fold { margin-top: 12px; }
.fold-head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 60px;
  padding: 16px 20px;
  text-align: left;
  cursor: pointer;
  font-weight: 900;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-deep);
  transition: background-color .2s var(--ease);
}
.fold-head:hover { background: rgba(255, 178, 94, .14); }
.fold-mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--ember);
  transition: transform .2s var(--ease);
}
.fold-mark::before,
.fold-mark::after {
  content: "";
  position: absolute;
  background: var(--ember);
  border-radius: 2px;
}
.fold-mark::before { left: 5px; right: 5px; top: 8px; height: 2px; }
.fold-mark::after { top: 5px; bottom: 5px; left: 8px; width: 2px; transition: opacity .2s var(--ease); }
.fold-head[aria-expanded="true"] .fold-mark { transform: rotate(180deg); }
.fold-head[aria-expanded="true"] .fold-mark::after { opacity: 0; }
.fold-body {
  padding: 0 20px 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-ink);
}
.fold-body[hidden] { display: none; }

/* 正文长文 */
.prose {
  max-width: 70ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--body-ink);
}
.prose--narrow { max-width: 58ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2 {
  margin-top: 1.8em;
  font-weight: 900;
  font-size: 24px;
  line-height: 1.35;
  color: var(--ink-deep);
}
.prose h3 {
  margin-top: 1.4em;
  font-weight: 900;
  font-size: 19px;
  color: var(--ink);
}
.prose ul, .prose ol { margin-top: 1em; padding-left: 1.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-top: .5em; }
.prose strong { color: var(--ink-deep); }

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--lead);
}
.crumbs li { display: inline-flex; align-items: center; gap: 10px; }
.crumbs li + li::before { content: "/"; color: var(--ink-soft); }
.crumbs a { transition: color .18s var(--ease); }
.crumbs a:hover { color: var(--ember); }
.crumbs [aria-current="page"] { color: var(--graphite); font-weight: 700; }

/* 按钮 */
.act {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 14px 28px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}
.act:hover { transform: translateY(-2px); }
.act:active { transform: translateY(0); }
.act--ember { background: var(--ember); color: var(--snow); }
.act--ember:hover { background: #D65A16; }
.act--ink { background: var(--ink-deep); color: var(--snow); }
.act--ink:hover { background: var(--ink); }
.act--line { background: var(--snow); border-color: var(--ink-soft); color: var(--ink-deep); }
.act--line:hover { border-color: var(--ember); color: var(--ember); }

/* 显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 6. 头部 ---------- */
.skip-link {
  position: absolute;
  top: -160px;
  left: var(--gutter);
  z-index: 200;
  padding: 12px 22px;
  border-radius: 0 0 var(--r-slab) var(--r-slab);
  background: var(--ember);
  color: var(--snow);
  font weight: 700;
  font-weight: 700;
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 100%; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  color: var(--snow);
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(11, 34, 51, .68) 0%, rgba(11, 34, 51, 0) 100%);
  transition: background-color .2s var(--ease), box-shadow .2s var(--ease);
}
.site-header.is-solid {
  background-color: var(--ink-deep);
  background-image: none;
  box-shadow: 0 1px 0 rgba(169, 203, 218, .26), 0 14px 30px -22px rgba(11, 34, 51, .95);
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 28px);
  height: var(--h-header);
  transition: height .2s var(--ease);
}
.site-header.is-solid .header-shell { height: var(--h-header-solid); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand-mark {
  flex: none;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--ember);
  color: var(--snow);
  font-family: var(--font-num);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
}
.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.25;
}
.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: .02em;
  white-space: nowrap;
}
.brand-sub {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.site-nav { display: none; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  color: inherit;
  white-space: nowrap;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.nav-link:hover {
  background: rgba(169, 203, 218, .18);
  border-color: rgba(169, 203, 218, .42);
}
.nav-link[aria-current="page"] {
  background: var(--snow);
  border-color: var(--snow);
  color: var(--ink-deep);
  font-weight: 700;
}
.nav-link[aria-current="page"]::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ember);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(169, 203, 218, .5);
  background: rgba(11, 34, 51, .42);
  color: var(--snow);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav-toggle:hover { background: var(--ember); border-color: var(--ember); }
.nav-toggle-glyph {
  position: relative;
  display: block;
  flex: none;
  width: 16px;
  height: 10px;
}
.nav-toggle-glyph span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.nav-toggle-glyph span:nth-child(1) { top: 0; }
.nav-toggle-glyph span:nth-child(2) { top: 4px; }
.nav-toggle-glyph span:nth-child(3) { top: 8px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-glyph span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

.scroll-meter {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--amber) 0%, var(--ember) 100%);
  transition: transform .12s linear;
}

@media (min-width: 1024px) {
  .site-nav { display: block; }
  .nav-toggle { display: none; }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 6vw, 74px) 0 28px;
  border-top: 5px solid var(--ember);
  background-color: var(--ink-deep);
  background-image: linear-gradient(180deg, #0B2233 0%, #081926 100%);
  color: var(--snow);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(169, 203, 218, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 203, 218, .08) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9) 0%, rgba(0, 0, 0, 0) 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9) 0%, rgba(0, 0, 0, 0) 72%);
}

.footer-shell { position: relative; z-index: 1; }

.footer-top {
  display: grid;
  gap: 26px;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: clamp(22px, 3vw, 32px);
  border-bottom: 1px dashed rgba(169, 203, 218, .34);
}
@media (min-width: 820px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: start;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}
.footer-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--ember);
  color: var(--amber);
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
}
.footer-wordmark {
  font-weight: 900;
  font-size: 22px;
  letter-spacing: .02em;
}
.footer-tagline {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ink-soft);
}

.footer-head {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(169, 203, 218, .42);
  font-size: 15px;
  font-weight: 500;
  color: var(--snow);
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}
.footer-link::after {
  content: "\2192";
  font-family: var(--font-num);
  color: var(--amber);
  transition: transform .2s var(--ease), color .2s var(--ease);
}
.footer-link:hover { background: var(--ember); border-color: var(--ember); }
.footer-link:hover::after { color: var(--snow); transform: translateX(3px); }

.footer-mid {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1px dashed rgba(169, 203, 218, .34);
}
@media (min-width: 820px) {
  .footer-mid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
    gap: clamp(28px, 5vw, 64px);
  }
}
.footer-dir-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 14px;
}
.footer-dir {
  padding: 7px 16px;
  border-radius: var(--r-pill);
  background: var(--ink-soft);
  color: var(--ink-deep);
  font-size: 15px;
  font-weight: 700;
}
.footer-note {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.footer-base {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(0, 1fr);
  padding-top: clamp(22px, 3vw, 30px);
}
@media (min-width: 820px) {
  .footer-base {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
    gap: clamp(28px, 5vw, 64px);
  }
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.footer-legal-link {
  font-size: 14px;
  color: var(--snow);
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(169, 203, 218, .45);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.footer-legal-link:hover { color: var(--amber); border-color: var(--amber); }

.footer-contact { display: grid; gap: 8px; }
.footer-contact-item {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.footer-contact-key {
  flex: none;
  min-width: 62px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--amber);
}

.footer-record {
  grid-column: 1 / -1;
  margin-top: 4px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.9;
  color: rgba(169, 203, 218, .8);
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1023px) {
  :root {
    --h-header: 68px;
    --h-header-solid: 60px;
  }

  .site-nav {
    position: absolute;
    top: var(--h-header);
    left: 0;
    right: 0;
    display: none;
    padding: 12px var(--gutter) 22px;
    background: var(--ink-deep);
    border-top: 1px solid rgba(169, 203, 218, .24);
    box-shadow: 0 26px 40px -28px rgba(11, 34, 51, .95);
    max-height: calc(100vh - var(--h-header));
    overflow-y: auto;
  }
  .site-header.is-solid .site-nav { top: var(--h-header-solid); }
  .site-nav[data-open] { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 16px;
    border-radius: var(--r-sm);
    font-size: 16px;
  }
  .nav-link[aria-current="page"] { border-radius: var(--r-sm); }
}

@media (max-width: 479px) {
  .brand-sub { display: none; }
  .brand-mark { font-size: 15px; padding: 5px 10px; }
  .brand-name { font-size: 16px; }
  .figure-num { font-size: clamp(34px, 12vw, 52px); }
}

/* ---------- 9. 焦点与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  [data-reveal] { opacity: 1; transform: none; }
  .act:hover,
  .slab:hover { transform: none; }
}