/* =========================================================
   澳门新葡萄 · 官方中文站 — 共享样式 /assets/site.css
   夜藤底色 + 墨绿阅读底，锐利直角与 1px 暖金细线
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --night: #170D1E;
  --vine: #10302A;
  --grape: #6B3FA0;
  --grape-light: #A87BD6;
  --gold: #E4B457;
  --gold-pale: #F2D79B;
  --cream: #F4EFE6;
  --muted: #C3B9AC;
  --shade: #1E4A3C;
  --alert: #B5533C;

  --line: rgba(228, 180, 87, 0.28);
  --line-strong: rgba(228, 180, 87, 0.66);
  --line-soft: rgba(228, 180, 87, 0.14);
  --grape-veil: rgba(107, 63, 160, 0.18);
  --vine-veil: rgba(30, 74, 60, 0.42);

  --f-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, serif;
  --f-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-display: clamp(2.6rem, 6vw, 5.2rem);
  --fs-title: clamp(1.75rem, 3.2vw, 2.6rem);
  --fs-sub: clamp(1.2rem, 1.7vw, 1.6rem);
  --fs-body: 1.05rem;
  --fs-note: 0.75rem;

  --w-page: 1180px;
  --pad-x: clamp(1rem, 3.4vw, 2.5rem);
  --gap: clamp(1rem, 2.2vw, 1.9rem);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. 重置与基础排版 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--cream);
  background:
    radial-gradient(1100px 600px at 10% -12%, rgba(107, 63, 160, 0.24), transparent 62%),
    radial-gradient(900px 520px at 94% 2%, rgba(30, 74, 60, 0.36), transparent 60%),
    var(--night);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-family: var(--f-display);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--cream);
}

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--grape-light); }

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

button { font: inherit; }

ul, ol { margin: 0 0 1.1em; padding-left: 1.4em; }

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

/* ---------- 3. 骨架组件 ---------- */
.container {
  width: 100%;
  max-width: calc(var(--w-page) + 2 * var(--pad-x));
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.section {
  padding-block: clamp(2.2rem, 5vw, 4.5rem);
  border-top: 1px solid var(--line-soft);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.5rem 1.25rem;
  margin-bottom: clamp(1.2rem, 2.6vw, 2rem);
}

.section-index {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding-left: 0.65rem;
  border-left: 2px solid var(--grape-light);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.28em;
  line-height: 1.6;
  color: var(--gold);
}

.section-title { margin: 0; font-size: var(--fs-title); }

.section-sub {
  margin: 0 0 0.6em;
  max-width: 34em;
  font-family: var(--f-body);
  font-size: var(--fs-body);
  color: var(--muted);
}

.lede {
  max-width: 34em;
  font-size: var(--fs-sub);
  line-height: 1.8;
  color: var(--cream);
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--line);
}

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

.page-title { margin: 0 0 0.5em; font-size: var(--fs-title); }

.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. 按钮与文字链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.15rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--gold-pale);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover {
  border-color: var(--gold);
  background: rgba(228, 180, 87, 0.1);
  color: var(--gold-pale);
}

.btn--solid {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--night);
}

.btn--solid:hover {
  background: var(--gold-pale);
  border-color: var(--gold-pale);
  color: var(--night);
}

.text-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.1em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.text-link:hover {
  color: var(--gold-pale);
  border-bottom-color: var(--gold);
}

/* ---------- 5. 框景与纵向注释 ---------- */
.frame {
  position: relative;
  padding: clamp(1.6rem, 4vw, 3.6rem);
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, var(--grape-veil), transparent 58%),
    linear-gradient(160deg, rgba(30, 74, 60, 0.5), rgba(23, 13, 30, 0.92));
}

.frame::before {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  background-image:
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold)),
    linear-gradient(var(--gold), var(--gold));
  background-repeat: no-repeat;
  background-size: 10px 1px, 1px 10px, 10px 1px, 1px 10px, 10px 1px, 1px 10px, 10px 1px, 1px 10px;
  background-position:
    left top, left top,
    right top, right top,
    left bottom, left bottom,
    right bottom, right bottom;
  opacity: 0.85;
}

.frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 8px;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 14px);
  opacity: 0.7;
}

.v-note {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.32em;
  line-height: 1;
  color: var(--muted);
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 1.1rem 0;
  list-style: none;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

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

.breadcrumb .sep { color: var(--grape); }

/* ---------- 7. 卡片与列表 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.entry-card {
  position: relative;
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), opacity 0.2s var(--ease);
}

.entry-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--vine-veil);
}

.entry-card.is-filtered { display: none; }

.card-title {
  margin: 0 0 0.4rem;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--fs-sub);
  line-height: 1.35;
  color: var(--cream);
}

.card-meta {
  margin: 0 0 0.6rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.tag {
  display: inline-block;
  margin-right: 0.4rem;
  padding: 0.15rem 0.55rem;
  border: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--gold);
}

.timeline {
  margin: 0;
  padding: 0 0 0 1.2rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 1.4rem 1rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.56rem;
  top: 0.8rem;
  width: 7px;
  height: 7px;
  background: var(--gold);
}

.timeline-num {
  margin: 0 0 0.2rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--grape-light);
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.step-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.step-num {
  padding-top: 0.35rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.tick-band {
  height: 16px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 12px);
}

/* ---------- 8. 图片容器（页面阶段放占位图） ---------- */
.media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--vine);
  aspect-ratio: 16 / 10;
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.82) saturate(0.9);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(107, 63, 160, 0.22), rgba(23, 13, 30, 0.55));
}

.media-caption {
  margin-top: 0.6rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 9. 页内筛选条 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.filter-btn {
  padding: 0.45rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  line-height: 1.5;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

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

.filter-btn[aria-pressed="true"] {
  color: var(--gold-pale);
  border-color: var(--line-strong);
  background: rgba(228, 180, 87, 0.09);
}

/* ---------- 10. 折叠组 ---------- */
.fold-group { border-top: 1px solid var(--line); }

.fold-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  width: 100%;
  padding: 1.1rem 0;
  border: 0;
  background: none;
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--cream);
  text-align: left;
  cursor: pointer;
}

.fold-head:hover { color: var(--gold-pale); }

.fold-num {
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.fold-mark {
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  color: var(--gold);
  transition: transform 0.24s var(--ease);
}

.fold-head[aria-expanded="true"] .fold-mark { transform: rotate(45deg); }

.fold-body { padding: 0 0 1.4rem; }
.fold-body[hidden] { display: none; }

/* ---------- 11. 右侧章节刻度导航 ---------- */
.scale-nav {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  position: sticky;
  top: 1.5rem;
}

.scale-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.16em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.scale-link::before {
  content: "";
  width: 12px;
  height: 1px;
  background: currentColor;
  transition: width 0.18s var(--ease);
}

.scale-link:hover,
.scale-link[aria-current="true"] { color: var(--gold); }

.scale-link[aria-current="true"]::before {
  width: 26px;
  background: var(--gold);
}

/* =========================================================
   12. 头部
   ========================================================= */
.site-header {
  position: relative;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 13, 30, 0.99), rgba(23, 13, 30, 0.93));
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -160%);
  z-index: 200;
  padding: 0.6rem 1rem;
  background: var(--gold);
  color: var(--night);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-decoration: none;
  transition: transform 0.18s var(--ease);
}

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

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  background: rgba(228, 180, 87, 0.1);
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--grape-light), var(--gold));
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.6rem, 2vw, 1.5rem);
  width: 100%;
  max-width: calc(var(--w-page) + 2 * var(--pad-x));
  margin: 0 auto;
  padding: clamp(1.2rem, 2.6vw, 1.9rem) var(--pad-x) clamp(0.85rem, 1.8vw, 1.2rem);
}

.masthead-note {
  margin: 0;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  line-height: 1.7;
  color: var(--muted);
}

.masthead-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  text-align: center;
}

.brand-name {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 3.8vw, 2.75rem);
  line-height: 1.05;
  letter-spacing: 0.04em;
  color: var(--cream);
  text-shadow: 0 0 26px rgba(107, 63, 160, 0.5);
}

.brand-line {
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--gold);
}

.masthead-utility {
  display: flex;
  justify-content: flex-end;
}

.utility-link {
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.16em;
  color: var(--gold);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.utility-link:hover {
  color: var(--gold-pale);
  border-bottom-color: var(--gold);
}

.nav-toggle {
  display: none;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  margin: 0.25rem auto 0;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--gold-pale);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

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

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.primary-nav {
  width: 100%;
  max-width: calc(var(--w-page) + 2 * var(--pad-x));
  margin: 0 auto;
  padding: 0 var(--pad-x);
  border-top: 1px solid var(--line-soft);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(0.6rem, 2.4vw, 2.4rem);
  margin: 0;
  padding: clamp(0.7rem, 1.4vw, 1rem) 0;
  list-style: none;
}

.nav-list > li { margin: 0; }

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 0.35rem 0 0.55rem;
  font-size: var(--fs-body);
  line-height: 1.3;
  letter-spacing: 0.08em;
  color: var(--cream);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transform: translateX(-50%);
  transition: width 0.18s var(--ease);
}

.nav-list a:hover { color: var(--gold-pale); }
.nav-list a:hover::after { width: 100%; }

.nav-list a[aria-current="page"] { color: var(--gold-pale); }
.nav-list a[aria-current="page"]::after { width: 100%; }

/* =========================================================
   13. 页脚
   ========================================================= */
.site-footer {
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding-block: clamp(2rem, 4.5vw, 3.5rem) clamp(1.2rem, 2.4vw, 2rem);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 48, 42, 0.6), rgba(23, 13, 30, 0.99));
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 0.85fr));
  gap: clamp(1.2rem, 3vw, 2.6rem);
  width: 100%;
  max-width: calc(var(--w-page) + 2 * var(--pad-x));
  margin: 0 auto;
  padding-inline: var(--pad-x);
}

.footer-brand-name {
  margin: 0 0 0.3rem;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  letter-spacing: 0.06em;
  color: var(--cream);
}

.footer-brand-sub {
  margin: 0 0 0.9rem;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.26em;
  color: var(--gold);
}

.footer-intro {
  max-width: 30em;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--muted);
}

.footer-col-title {
  margin: 0 0 0.8rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  font-weight: 400;
  letter-spacing: 0.26em;
  color: var(--gold);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-block;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
  font-size: 0.95rem;
  color: var(--cream);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-link:hover {
  color: var(--gold-pale);
  border-bottom-color: var(--line-strong);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.6rem;
  width: 100%;
  max-width: calc(var(--w-page) + 2 * var(--pad-x));
  margin: clamp(1.6rem, 3vw, 2.4rem) auto 0;
  padding: 1rem var(--pad-x) 0;
  border-top: 1px solid var(--line-soft);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer-contact-label {
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.footer-mail {
  font-family: var(--f-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.mail-copy {
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  color: var(--gold-pale);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.mail-copy:hover {
  border-color: var(--line-strong);
  background: rgba(228, 180, 87, 0.1);
  color: var(--gold);
}

.footer-legal {
  margin: 0;
  font-family: var(--f-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  line-height: 1.8;
  color: var(--muted);
}

/* =========================================================
   14. 响应式
   ========================================================= */
@media (min-width: 820px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .footer-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .masthead {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    text-align: center;
    padding-bottom: 0.6rem;
  }

  .masthead-note {
    order: -1;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
  }

  .masthead-utility { justify-content: center; }

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

  .primary-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.3s var(--ease), visibility 0.3s var(--ease);
  }

  .primary-nav[data-open] {
    max-height: 34rem;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.25rem 0 0.9rem;
  }

  .nav-list > li { border-top: 1px solid var(--line-soft); }
  .nav-list > li:first-child { border-top: 0; }

  .nav-list a { display: block; padding: 0.85rem 0.1rem; }

  .nav-list a::after {
    left: 0;
    transform: none;
    width: 0;
  }

  .nav-list a:hover::after,
  .nav-list a[aria-current="page"]::after { width: 28px; }
}

@media (max-width: 560px) {
  .footer-main { grid-template-columns: minmax(0, 1fr); }
  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
  }
  .frame { padding: 1.25rem; }
  .v-note { display: none; }
}

/* ---------- 15. 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;
  }

  .entry-card:hover { transform: none; }
  .scale-link[aria-current="true"]::before { width: 26px; }
}