/* =========================================================
   如意官网 · 共享样式 /assets/site.css
   年鉴档案 × 非对称编辑部版式
   1 重置  2 令牌  3 排版  4 按钮标签  5 容器网格
   6 基础组件  7 刊头  8 页脚  9 响应式  10 动效与无障碍
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

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

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

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

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

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

table { border-collapse: collapse; }

/* ---------- 2 设计令牌 ---------- */
:root {
  --sand: #EFE4D2;
  --sand-mid: #D8C6A8;
  --cream: #FBF6EA;
  --rock: #3A3936;
  --rock-deep: #1E1D1A;
  --ink: #141310;
  --cinnabar: #B23A2E;
  --copper: #A87C36;
  --blue: #2C6C8A;
  --blue-light: #9FC0CF;

  --paper-line: rgba(20, 19, 16, 0.16);
  --paper-line-strong: rgba(20, 19, 16, 0.42);
  --copper-line: rgba(168, 124, 54, 0.52);
  --cinnabar-line: rgba(178, 58, 46, 0.65);
  --cream-line: rgba(251, 246, 234, 0.22);

  --shadow-hard: 6px 6px 0 var(--ink);
  --shadow-hard-sm: 3px 3px 0 var(--ink);

  --font-display: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", SimSun, "宋体", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 44px);
  --radius: 2px;
  --radius-lg: 6px;
  --gap: clamp(18px, 2.4vw, 30px);
}

/* ---------- 3 中文排版与工具类 ---------- */
body {
  background-color: var(--sand);
  background-image: radial-gradient(rgba(20, 19, 16, 0.045) 1px, transparent 1px);
  background-size: 4px 4px;
  color: var(--rock);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (min-width: 900px) {
  body { font-size: 17px; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.28;
  color: var(--ink);
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(30px, 5vw, 54px); }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }

p { word-break: break-word; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cinnabar);
}

.annotation {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--copper);
}

.lead {
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.8;
  color: var(--rock);
  max-width: 40em;
}

.prose { max-width: 44em; }
.prose > p { max-width: 38em; margin-bottom: 1.1em; }
.prose > p:last-child { margin-bottom: 0; }
.prose h2 { margin: 1.8em 0 0.6em; }
.prose h3 { margin: 1.5em 0 0.5em; }
.prose ul { max-width: 38em; margin: 0 0 1.1em; }
.prose li { position: relative; padding-left: 1.4em; margin-bottom: 0.4em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 2px;
  background: var(--copper);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 4 通用按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  min-height: 42px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--cream);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }

.btn--cta { background: var(--cinnabar); color: var(--cream); }
.btn--copper { background: var(--copper); color: var(--rock-deep); }
.btn--ghost { background: transparent; box-shadow: none; border-color: var(--rock); color: var(--rock); }
.btn--ghost:hover { background: var(--sand-mid); box-shadow: none; transform: none; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--rock);
  background: var(--sand-mid);
  border: 1px solid var(--paper-line-strong);
  border-radius: var(--radius);
}

.tag--cinnabar { color: var(--cinnabar); background: transparent; border-color: var(--cinnabar-line); }
.tag--copper { color: var(--copper); background: transparent; border-color: var(--copper-line); }
.tag--blue { color: var(--blue); background: transparent; border-color: rgba(44, 108, 138, 0.55); }

/* ---------- 5 内容容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(42px, 6vw, 78px); }
.section--tight { padding-block: clamp(26px, 3.6vw, 46px); }

.grid { display: grid; gap: var(--gap); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); }
.grid--asym-rev { grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

.rule-tick {
  height: 8px;
  border-top: 1px solid var(--paper-line-strong);
  border-bottom: 1px solid var(--paper-line-strong);
  background-image: repeating-linear-gradient(90deg, var(--copper) 0 1px, transparent 1px 14px);
}

/* ---------- 6 基础组件 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

.breadcrumb a { color: var(--rock); border-bottom: 1px solid var(--copper-line); }
.breadcrumb a:hover { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }
.breadcrumb__sep { color: var(--copper); }
.breadcrumb [aria-current="page"] { color: var(--cinnabar); }

.card {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--cream);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.card--flat { box-shadow: none; background: var(--sand-mid); }

.card__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.36;
  color: var(--ink);
}

.card__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--copper);
}

.figure {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.figure--blue { color: var(--blue); }
.figure--cinnabar { color: var(--cinnabar); }

.scale-band {
  display: flex;
  flex-wrap: wrap;
  background: var(--sand-mid);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.scale-band__item {
  position: relative;
  flex: 1 1 116px;
  padding: 18px 16px 16px;
  border-right: 1px solid var(--copper-line);
}

.scale-band__item:last-child { border-right: 0; }

.scale-band__tick {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 10px;
  background: var(--copper);
}

.scale-band__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rock);
}

.scale-band__value {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  color: var(--blue);
}

.scale-band__note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--rock);
}

.media-figure { margin: 0; }

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  background: var(--sand-mid);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--copper);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--ink);
}

.tab {
  margin-bottom: -2px;
  padding: 11px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--rock);
  border: 2px solid transparent;
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
}

.tab:hover { color: var(--cinnabar); }

.tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cream);
  border-color: var(--ink);
  box-shadow: inset 0 3px 0 var(--cinnabar);
}

.tabpanel { padding-top: clamp(18px, 2.4vw, 28px); }
.tabpanel[hidden] { display: none; }

/* ---------- 7 刊头 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cream);
  background: var(--rock-deep);
  border: 2px solid var(--cinnabar);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--cream);
  border-bottom: 2px solid var(--ink);
  box-shadow: 0 2px 0 var(--copper);
}

.site-header__band {
  height: 8px;
  background-color: var(--sand-mid);
  background-image: repeating-linear-gradient(90deg, var(--copper) 0 1px, transparent 1px 14px);
  border-bottom: 1px solid var(--ink);
}

.masthead {
  padding: 14px var(--gutter) 8px;
  transition: padding 0.2s ease;
}

.masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  max-width: var(--shell);
  margin: 0 auto;
}

.masthead__stamp {
  justify-self: start;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
  text-transform: uppercase;
}

.masthead__center {
  justify-self: center;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}

.brand__cn {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  color: var(--ink);
  transition: font-size 0.2s ease;
}

.brand__en {
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cinnabar);
}

.brand__sub {
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--rock);
  opacity: 0.85;
}

.masthead__aside {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 16px;
}

.masthead__tagline {
  max-width: 22ch;
  font-size: 12px;
  line-height: 1.55;
  text-align: right;
  color: var(--rock);
  opacity: 0.8;
}

.nav-bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  border-top: 1px solid var(--paper-line);
}

.nav-bar__label {
  display: none;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--copper);
}

.nav { position: relative; }

.nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
}

.nav__item { display: flex; }
.nav__item + .nav__item { border-left: 1px solid var(--copper-line); }

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 13px 20px;
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--rock);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 6px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s ease;
}

.nav__link:hover,
.nav__link:focus-visible { color: var(--cinnabar); }

.nav__link:hover::after,
.nav__link:focus-visible::after { transform: scaleX(1); }

.nav__link[aria-current="page"] {
  color: var(--cinnabar);
  font-weight: 700;
  background: rgba(178, 58, 46, 0.06);
}

.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--ink);
  background: var(--sand);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard-sm);
}

.nav-toggle[aria-expanded="true"] {
  background: var(--cinnabar);
  color: var(--cream);
}

.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__label { line-height: 1; }

.site-header[data-scrolled] .masthead { padding: 8px var(--gutter) 6px; }
.site-header[data-scrolled] .brand__cn { font-size: clamp(22px, 3vw, 28px); }
.site-header[data-scrolled] .brand__sub,
.site-header[data-scrolled] .masthead__stamp,
.site-header[data-scrolled] .masthead__tagline { display: none; }

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--copper), var(--cinnabar));
  transition: width 0.12s linear;
}

/* ---------- 8 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 7vw, 90px);
  color: var(--cream);
  background: var(--rock-deep);
  border-top: 4px solid var(--cinnabar);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.05fr 1.35fr 0.85fr;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 58px) var(--gutter);
}

.footer-block { padding: 0 clamp(16px, 3vw, 34px); }
.footer-block:first-child { padding-left: 0; }
.footer-block:last-child { padding-right: 0; }
.footer-block + .footer-block { border-left: 1px solid var(--cinnabar-line); }

.footer-block__title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--copper);
}

.footer-index { display: flex; flex-wrap: wrap; gap: 0 clamp(18px, 3vw, 40px); }

.footer-index__group { display: flex; flex-direction: column; }

.footer-index a {
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--cream);
  opacity: 0.85;
  border-bottom: 1px solid transparent;
  transition: opacity 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.footer-index a:hover,
.footer-index a:focus-visible {
  opacity: 1;
  color: var(--cream);
  border-bottom-color: var(--cinnabar);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cream);
}

.footer-contact li:first-child { color: var(--copper); }

.footer-note {
  margin-top: 14px;
  max-width: 44ch;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(251, 246, 234, 0.72);
}

.footer-batch {
  margin-top: 14px;
  padding-top: 12px;
  font-size: 12px;
  color: var(--copper);
  border-top: 1px dashed var(--copper-line);
}

.footer-block--legal { text-align: right; }

.footer-sign,
.footer-icp,
.footer-copy {
  font-size: 12px;
  line-height: 1.9;
  color: rgba(251, 246, 234, 0.8);
}

.footer-icp { color: var(--cream); }
.footer-copy { color: rgba(251, 246, 234, 0.62); }

/* ---------- 9 响应式 ---------- */
@media (max-width: 1080px) {
  .masthead__tagline { display: none; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .footer-block--legal {
    grid-column: 1 / -1;
    margin-top: 26px;
    padding: 18px 0 0;
    text-align: left;
    border-top: 1px solid var(--cinnabar-line);
  }
  .footer-block--legal .footer-sign,
  .footer-block--legal .footer-icp,
  .footer-block--legal .footer-copy { display: inline-block; margin-right: 18px; }
}

@media (max-width: 899px) {
  html { scroll-padding-top: 96px; }

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

  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .grid--12 > * { grid-column: auto; }

  .masthead { padding: 12px var(--gutter) 8px; }
  .masthead__inner { grid-template-columns: minmax(0, 1fr) auto; gap: 12px; }
  .masthead__stamp { display: none; }
  .masthead__center { justify-self: start; text-align: left; }
  .masthead__aside { gap: 0; }
  .masthead__aside .btn { padding: 9px 13px; font-size: 12px; }
  .brand__cn { font-size: 30px; }

  .nav-bar {
    justify-content: space-between;
    padding-block: 8px;
  }

  .nav-bar__label { display: block; }

  .nav-toggle { display: inline-flex; margin: 0; }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 90;
    display: none;
    background: var(--cream);
    border-top: 2px solid var(--ink);
    border-bottom: 2px solid var(--ink);
    box-shadow: 0 8px 0 rgba(20, 19, 16, 0.14);
  }

  .nav[data-open] { display: block; }

  .nav__list { flex-direction: column; align-items: stretch; padding: 4px 0; }

  .nav__item { display: block; }

  .nav__item + .nav__item { border-left: 0; border-top: 1px solid var(--paper-line); }

  .nav__link {
    width: 100%;
    padding: 15px var(--gutter);
    font-size: 16px;
    justify-content: flex-start;
  }

  .nav__link::after {
    left: var(--gutter);
    right: auto;
    bottom: 12px;
    width: 28px;
  }

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

  .footer-block { padding: 0; }
  .footer-block + .footer-block {
    margin-top: 24px;
    padding-top: 22px;
    border-left: 0;
    border-top: 1px solid var(--cinnabar-line);
  }

  .footer-block--legal { margin-top: 24px; }
  .footer-index { gap: 0 28px; }
}

@media (max-width: 560px) {
  .brand__en { display: none; }
  .masthead__aside .btn { padding: 8px 11px; letter-spacing: 0.08em; }
  .figure { font-size: clamp(28px, 9vw, 40px); }
  .scale-band__item { flex: 1 1 100%; border-right: 0; border-bottom: 1px solid var(--copper-line); }
  .scale-band__item:last-child { border-bottom: 0; }
}

/* ---------- 10 动效与无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--cinnabar);
  outline-offset: 2px;
}

.site-footer :focus-visible { outline-color: var(--copper); }

html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

html[data-js="on"] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

.tabpanel[data-active] { animation: tabFade 0.26s ease both; }

@keyframes tabFade {
  from { opacity: 0; transform: translateX(10px); }
  to { opacity: 1; transform: none; }
}

@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[data-js="on"] [data-reveal] { opacity: 1; transform: none; }
  .tabpanel[data-active] { animation: none; }
  .site-header__progress { transition: none; }
}