/* ============================================================
   /assets/site.css
   金博棋牌老版 · 资料卷宗 — 共享外壳样式
   reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 1.5rem;
}

body { margin: 0; }

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { background: none; border: 0; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩 */
  --ink-green: #0E2B24;
  --ink-green-deep: #071A15;
  --paper-yellow: #E8D9B5;
  --paper-white: #F6F1E5;
  --gold: #C6A15B;
  --gold-soft: #D8BB80;
  --cinnabar: #B33A2B;
  --cinnabar-deep: #8F2C20;
  --copper: #8C6A3F;
  --grey-green: #6F857B;
  --ink-black: #111311;
  --muted: #CFC6B2;

  /* 字体 */
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  /* 字号阶梯 */
  --step-display: clamp(2.8rem, 7vw, 6.4rem);
  --step-h1: clamp(2rem, 4.4vw, 3.4rem);
  --step-h2: clamp(1.6rem, 3vw, 2.6rem);
  --step-h3: clamp(1.12rem, 1.6vw, 1.45rem);
  --step-body: clamp(1rem, 0.35vw + 0.94rem, 1.12rem);
  --step-small: 0.86rem;
  --step-mini: 0.74rem;

  /* 结构 */
  --wrap: 1180px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --border: 2px solid var(--ink-green-deep);
  --shadow-hard: 6px 6px 0 var(--ink-green-deep);
  --shadow-soft: 0 20px 44px -28px rgba(5, 18, 15, 0.9);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--ink-green);
  color: var(--paper-white);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  line-height: 1.75;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

h1 { font-size: var(--step-h1); }
h2 { font-size: var(--step-h2); }
h3 { font-size: var(--step-h3); }

a { color: inherit; }

/* ---------- 4. 无障碍与焦点 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -240%);
  display: inline-block;
  padding: 0.7rem 1.25rem;
  background: var(--paper-white);
  color: var(--ink-green);
  border: 2px solid var(--cinnabar);
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.14em;
  text-decoration: none;
  box-shadow: 4px 4px 0 rgba(5, 18, 15, 0.7);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: translate(-50%, 0); }

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 5. 版心 / 节奏 ---------- */
.wrap {
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section { padding-block: clamp(2.4rem, 6vw, 4.6rem); }

.section__head { margin-bottom: clamp(1.3rem, 3vw, 2.2rem); }

.section__title { font-size: var(--step-h2); }

.section__kicker { margin-bottom: 0.7rem; }

.rule {
  height: 0;
  border: 0;
  border-top: 2px solid var(--copper);
  opacity: 0.55;
  margin-block: clamp(1.6rem, 4vw, 2.8rem);
}

/* ---------- 6. 文本工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--cinnabar);
  flex: none;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  color: var(--paper-white);
  background: var(--cinnabar);
  border: 2px solid var(--ink-green-deep);
  box-shadow: 4px 4px 0 var(--ink-green-deep);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background-color 0.18s var(--ease);
}

.btn:hover {
  background: var(--cinnabar-deep);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink-green-deep);
}

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

.btn--gold {
  background: var(--gold);
  color: var(--ink-green-deep);
}

.btn--gold:hover { background: var(--gold-soft); }

.btn--ink {
  background: transparent;
  color: var(--ink-green);
  border-color: var(--ink-green);
  box-shadow: 4px 4px 0 rgba(14, 43, 36, 0.24);
}

.btn--ink:hover {
  background: rgba(14, 43, 36, 0.08);
  box-shadow: 6px 6px 0 rgba(14, 43, 36, 0.3);
}

.btn--ghost {
  background: transparent;
  color: var(--paper-yellow);
  border-color: var(--copper);
  box-shadow: 4px 4px 0 rgba(5, 18, 15, 0.65);
}

.btn--ghost:hover {
  background: rgba(198, 161, 91, 0.12);
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  font-weight: 500;
  letter-spacing: 0.1em;
  white-space: nowrap;
  background: transparent;
  border: 1px solid var(--copper);
  color: var(--copper);
}

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

.tag--cinnabar {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper-white);
}

/* ---------- 9. 面板 ---------- */
.panel {
  padding: clamp(1.1rem, 2.6vw, 2rem);
  border: var(--border);
  box-shadow: var(--shadow-hard);
}

.panel--paper {
  background: var(--paper-white);
  color: var(--ink-black);
}

.panel--yellow {
  background: var(--paper-yellow);
  color: var(--ink-black);
}

.panel--ink {
  background: var(--ink-green-deep);
  color: var(--paper-white);
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(198, 161, 91, 0.2);
}

/* ---------- 10. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }

.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 2px solid var(--ink-green-deep);
  box-shadow: var(--shadow-hard);
  background:
    repeating-linear-gradient(135deg, rgba(198, 161, 91, 0.1) 0 10px, rgba(198, 161, 91, 0) 10px 20px),
    var(--ink-green-deep);
  isolation: isolate;
}

.media-frame--portrait { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }

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

.media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.35rem 0.7rem;
  background: var(--ink-green-deep);
  color: var(--gold);
  border-top: 1px solid var(--copper);
  border-right: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.14em;
}

.media-frame__caption {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.1em;
  color: var(--grey-green);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb { padding-top: clamp(1rem, 2.5vw, 1.6rem); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.08em;
  color: var(--grey-green);
}

.breadcrumb__link {
  color: var(--paper-yellow);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.breadcrumb__sep { color: var(--copper); }

.breadcrumb__current { color: var(--gold); }

.breadcrumb__item[aria-current="page"] { color: var(--gold); }

/* ---------- 13. 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-family: var(--font-sans);
  font-size: var(--step-body);
  line-height: 1.78;
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-family: var(--font-serif);
  line-height: 1.25;
}

.prose h2 { font-size: var(--step-h3); }
.prose h3 { font-size: 1.08rem; }

.prose ul,
.prose ol {
  list-style: disc;
  padding-left: 1.35em;
}

.prose ol { list-style: decimal; }

.prose li + li { margin-top: 0.4em; }

.prose a {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--cinnabar);
  text-underline-offset: 3px;
}

.prose a:hover { color: var(--gold); }

.prose strong { font-weight: 700; }

/* ---------- 14. 筛选协议 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.filter-btn {
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  font-weight: 500;
  letter-spacing: 0.12em;
  cursor: pointer;
  background: transparent;
  color: var(--paper-yellow);
  border: 1.5px solid var(--copper);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.filter-btn:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.filter-btn[aria-pressed="true"] {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper-white);
  box-shadow: 3px 3px 0 rgba(5, 18, 15, 0.7);
}

.filter-bar--ink .filter-btn {
  color: var(--ink-green);
  border-color: var(--copper);
}

.filter-bar--ink .filter-btn:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.filter-bar--ink .filter-btn[aria-pressed="true"] {
  color: var(--paper-white);
  border-color: var(--cinnabar);
}

[data-filter-item][hidden] { display: none !important; }

/* ---------- 15. 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 90;
  pointer-events: none;
  background: rgba(5, 18, 15, 0.45);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--cinnabar));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* ---------- 16. 头部 ---------- */
.site-header {
  position: relative;
  z-index: 40;
  background: var(--ink-green);
  color: var(--paper-white);
  border-bottom: 4px solid var(--gold);
}

/* 档案条 */
.archive-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1.6rem;
  padding: 0.55rem var(--gutter);
  background: var(--ink-green-deep);
  color: var(--paper-yellow);
  border-bottom: 1px solid rgba(198, 161, 91, 0.32);
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.12em;
}

.archive-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.archive-strip__item::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--gold);
}

.archive-strip__link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
  padding-bottom: 1px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.archive-strip__link:hover {
  color: var(--paper-white);
  border-bottom-color: var(--paper-white);
}

/* 刊头 */
.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: clamp(1.1rem, 2.8vw, 1.9rem) var(--gutter) clamp(0.8rem, 2vw, 1.15rem);
  text-align: center;
  border-bottom: 1px solid rgba(198, 161, 91, 0.26);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  flex: none;
  background: var(--cinnabar);
  color: var(--paper-white);
  border: 2px solid var(--gold);
  box-shadow: 3px 3px 0 var(--ink-green-deep);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.3rem;
  line-height: 1;
  transform: rotate(-3deg);
}

.brand__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.2vw, 2.1rem);
  letter-spacing: 0.07em;
  color: var(--paper-white);
}

.brand__sub {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.36em;
  color: var(--gold);
}

.brand:hover .brand__name { color: var(--gold); }

.masthead__tagline {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.28em;
  color: var(--grey-green);
}

/* 导航 */
.nav-bar {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 0 var(--gutter);
  background: var(--ink-green);
  border-top: 1px solid rgba(140, 106, 63, 0.4);
}

.site-nav {
  width: 100%;
  max-width: var(--wrap);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0.3rem 0;
}

.site-nav__item { display: block; }

.site-nav__link {
  display: inline-block;
  padding: 0.7rem 0.95rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  color: var(--paper-yellow);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
              border-color 0.2s var(--ease);
}

.site-nav__link:hover {
  color: var(--gold);
  background: rgba(198, 161, 91, 0.09);
}

.site-nav__link[aria-current="page"] {
  color: var(--paper-white);
  border-bottom-color: var(--cinnabar);
  background: rgba(179, 58, 43, 0.18);
}

.nav-toggle { display: none; }

/* ---------- 17. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(2.5rem, 7vw, 6rem);
  background: var(--ink-green-deep);
  color: var(--paper-yellow);
  border-top: 4px solid var(--gold);
}

.footer-inner {
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: clamp(2rem, 5vw, 3.4rem);
  display: grid;
  grid-template-columns: minmax(200px, 0.9fr) 2fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.footer-brand__name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  letter-spacing: 0.06em;
  color: var(--paper-white);
}

.footer-brand__note {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.16em;
  color: var(--grey-green);
}

.footer-brand__stamp {
  display: inline-block;
  margin-top: 1.15rem;
  padding: 0.3rem 0.7rem;
  background: var(--cinnabar);
  color: var(--paper-white);
  border: 2px solid var(--gold);
  box-shadow: 3px 3px 0 rgba(5, 18, 15, 0.55);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  transform: rotate(-2deg);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

.footer-col__title {
  margin: 0 0 0.85rem;
  padding-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gold);
  border-bottom: 1px solid rgba(140, 106, 63, 0.5);
}

.footer-col__list {
  display: grid;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col__link {
  font-size: 0.92rem;
  color: var(--paper-yellow);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-col__link:hover {
  color: var(--gold);
  border-bottom-color: var(--copper);
}

.footer-contact {
  width: min(var(--wrap), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: clamp(1.1rem, 2.4vw, 1.6rem);
  border-top: 1px solid rgba(140, 106, 63, 0.45);
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.8rem;
  font-size: var(--step-small);
  color: var(--muted);
}

.footer-contact__item {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.14em;
  color: var(--gold);
}

.footer-contact__item--note {
  flex-basis: 100%;
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.06em;
  color: var(--grey-green);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 1.4rem;
  padding: 0.9rem var(--gutter);
  background: var(--ink-green);
  border-top: 1px solid rgba(198, 161, 91, 0.28);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--step-mini);
  letter-spacing: 0.1em;
}

/* ---------- 18. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 19. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .nav-bar {
    display: block;
    padding: 0;
  }

  .nav-toggle {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem var(--gutter);
    background: var(--ink-green-deep);
    color: var(--paper-yellow);
    border-top: 1px solid rgba(198, 161, 91, 0.3);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: var(--step-mini);
    letter-spacing: 0.22em;
  }

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

  .nav-toggle__label { order: 2; }

  .nav-toggle__bars {
    order: 1;
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    width: 22px;
    flex: none;
  }

  .nav-toggle__bars span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--gold);
    transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-width: none;
    display: none;
    background: var(--ink-green-deep);
    border-bottom: 3px solid var(--gold);
    box-shadow: 0 18px 34px -14px rgba(0, 0, 0, 0.65);
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
    z-index: 60;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(140, 106, 63, 0.35);
  }

  .site-nav__link {
    display: block;
    padding: 0.95rem var(--gutter);
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--cinnabar);
    border-bottom-color: transparent;
    background: rgba(179, 58, 43, 0.18);
  }

  .archive-strip { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .masthead { gap: 0.6rem; }
  .brand { gap: 0.7rem; }
  .brand__mark { width: 2.2rem; height: 2.2rem; font-size: 1.1rem; }
  .brand__sub { letter-spacing: 0.28em; }
  .masthead__tagline { letter-spacing: 0.2em; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-base { justify-content: flex-start; }
  .footer-contact { flex-direction: column; gap: 0.5rem; }
  .footer-contact__item { display: block; }
  .footer-contact__label { display: block; margin-bottom: 0.15rem; }
}

@media (max-width: 400px) {
  .archive-strip__item:not(:first-child) { display: none; }
}

/* ---------- 20. 减弱动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .btn:active {
    transform: none;
  }
}