/* ============================================================
   问鼎苹果会馆 · 共享样式表 /assets/site.css
   夜间会馆的发光索引：墨绿纸背 · 鎏金界栏 · 暖白案册
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #0B2A22;
  --ink-deep: #061A15;
  --celadon: #1F5C4A;
  --gold: #C6A15B;
  --gold-bright: #E8C98A;
  --paper: #F4EEDF;
  --paper-soft: rgba(244, 238, 223, 0.86);
  --paper-dim: rgba(244, 238, 223, 0.64);
  --clay: #C96F45;
  --cyan: #3FD0C9;
  --mist: #8C9B95;
  --ink-text: #10201B;

  --line-gold: rgba(198, 161, 91, 0.28);
  --line-gold-strong: rgba(198, 161, 91, 0.55);
  --line-soft: rgba(140, 155, 149, 0.22);
  --paper-line: rgba(16, 32, 27, 0.16);

  --font-display: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Source Han Sans SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", ui-monospace, monospace;

  --wrap: 1180px;
  --gutter: clamp(18px, 4vw, 46px);
  --radius: 3px;
  --shadow-paper: 7px 7px 0 rgba(3, 14, 11, 0.55), 0 0 0 1px rgba(198, 161, 91, 0.3);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--ink);
  color: var(--paper-soft);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button { font: inherit; color: inherit; }

ul, ol { margin: 0 0 1.1em; padding-left: 1.35em; }

[id] { scroll-margin-top: 9rem; }

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

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

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--paper);
}

h1 { font-size: clamp(2.05rem, 4.6vw, 3.5rem); letter-spacing: 0.04em; }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); }
h3 { font-size: clamp(1.12rem, 1.8vw, 1.34rem); }
h4 { font-size: 1rem; letter-spacing: 0.09em; }

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

a { color: var(--gold-bright); text-decoration: none; }
a:hover { color: #F3DCA8; }

strong { color: var(--paper); font-weight: 600; }

small { font-size: 0.82em; }

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

.wrap--narrow { max-width: 840px; }

.page-main { display: block; padding-block: clamp(1.5rem, 4vw, 2.8rem) 0; }

.section { padding-block: clamp(2.2rem, 5vw, 4rem); }
.section + .section { border-top: 1px solid var(--line-soft); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, 2rem); }
.grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr); align-items: start; }

.prose { max-width: 62ch; }
.prose a {
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-color: rgba(198, 161, 91, 0.55);
  text-decoration-thickness: 1px;
}
.prose a:hover { text-decoration-color: var(--gold-bright); }
.prose h2, .prose h3 { margin-top: 1.9em; }
.prose ul, .prose ol { margin-bottom: 1.3em; }
.prose li { margin-bottom: 0.45em; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 300;
  transform: translate(-50%, -160%);
  padding: 0.7rem 1.3rem;
  background: var(--gold-bright);
  color: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: transform 0.22s ease;
}
.skip-link:focus { transform: translate(-50%, 0); color: var(--ink-deep); }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, #0C2E25 0%, #08221B 100%);
  border-bottom: 1px solid var(--line-gold);
  box-shadow: 0 22px 44px -34px rgba(0, 0, 0, 0.95);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(6, 26, 21, 0.9);
  z-index: 150;
  pointer-events: none;
}
.reading-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-bright) 62%, var(--cyan) 100%);
  box-shadow: 0 0 14px rgba(63, 208, 201, 0.55);
  transition: width 0.14s linear;
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1.2rem;
  padding-block: 1.05rem 0.9rem;
}

.masthead-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  line-height: 1.5;
  color: var(--mist);
  text-transform: uppercase;
}
.masthead-meta--right { text-align: right; }

.masthead-brand {
  display: grid;
  gap: 0.32rem;
  justify-items: center;
  color: var(--paper);
  transition: color 0.25s ease;
}
.masthead-brand:hover { color: var(--gold-bright); }

.masthead-brand__cn {
  font-family: var(--font-display);
  font-size: clamp(1.32rem, 2.5vw, 1.92rem);
  font-weight: 600;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  line-height: 1.1;
  white-space: nowrap;
}

.masthead-brand__latin {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.44em;
  text-indent: 0.44em;
  color: var(--gold);
  line-height: 1;
}

.nav-bar {
  position: relative;
  border-top: 1px solid rgba(198, 161, 91, 0.2);
  background: rgba(5, 22, 18, 0.6);
}

.nav-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
}

.primary-nav { display: block; }

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(0.9rem, 2.6vw, 2.3rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav__list a {
  position: relative;
  display: inline-block;
  padding: 0.92rem 0.14rem;
  font-size: 0.88rem;
  letter-spacing: 0.16em;
  color: rgba(244, 238, 223, 0.76);
  transition: color 0.24s ease;
}

.primary-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.62rem;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.28s ease;
}

.primary-nav__list a:hover { color: var(--gold-bright); }
.primary-nav__list a:hover::after { transform: scaleX(1); }

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

.nav-cta {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  padding: 0.46rem 0.92rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--ink-deep);
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  border: 1px solid rgba(232, 201, 138, 0.9);
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background 0.24s ease, color 0.24s ease;
}
.nav-cta:hover { background: linear-gradient(180deg, #F6E2B4, var(--gold-bright)); color: var(--ink-deep); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.65rem;
  padding: 0.48rem 0.82rem;
  background: transparent;
  border: 1px solid rgba(198, 161, 91, 0.45);
  border-radius: var(--radius);
  color: var(--gold-bright);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: border-color 0.24s ease, color 0.24s ease;
}
.nav-toggle:hover { border-color: var(--gold-bright); color: #F6E2B4; }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 11px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform 0.26s ease;
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

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

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 5.5rem);
  background: linear-gradient(180deg, #071F19 0%, #04120F 100%);
  border-top: 1px solid var(--line-gold-strong);
  color: var(--paper-dim);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.55;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.8fr 1.15fr;
  gap: clamp(1.6rem, 4vw, 3.4rem);
  padding-block: clamp(2.4rem, 5vw, 3.6rem) clamp(1.6rem, 3vw, 2.4rem);
}

.footer-brand__name {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.38rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--paper);
}

.footer-brand__desc {
  margin: 0 0 0.9rem;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--paper-dim);
  max-width: 26ch;
}

.footer-brand__mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
}

.footer-heading {
  margin: 0 0 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  color: var(--mist);
  text-transform: uppercase;
}

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

.footer-nav__list a {
  display: inline-block;
  padding-bottom: 0.12rem;
  font-size: 0.9rem;
  color: rgba(244, 238, 223, 0.82);
  border-bottom: 1px solid transparent;
  transition: color 0.22s ease, border-color 0.22s ease;
}
.footer-nav__list a:hover {
  color: var(--gold-bright);
  border-bottom-color: rgba(198, 161, 91, 0.6);
}

.footer-contact__row {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr);
  gap: 0.7rem;
  margin: 0 0 0.62rem;
  font-size: 0.86rem;
  line-height: 1.7;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--mist);
  padding-top: 0.28em;
}

.footer-contact__val {
  color: rgba(244, 238, 223, 0.88);
  word-break: break-word;
}

.footer-contact__note {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed rgba(140, 155, 149, 0.28);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.6rem;
  padding-block: 1.1rem 1.7rem;
  border-top: 1px solid rgba(140, 155, 149, 0.16);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: rgba(140, 155, 149, 0.92);
}
.footer-legal p { margin: 0; }
.footer-legal__icp { color: var(--gold); }

/* ---------- 8. 通用组件 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
}
.section-label::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--gold-bright);
  background: transparent;
  border: 1px solid var(--line-gold-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.24s ease, color 0.24s ease, border-color 0.24s ease;
}
.btn:hover { color: var(--gold-bright); border-color: var(--gold-bright); background: rgba(198, 161, 91, 0.12); }

.btn--gold {
  color: var(--ink-deep);
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  border-color: rgba(232, 201, 138, 0.9);
}
.btn--gold:hover {
  color: var(--ink-deep);
  background: linear-gradient(180deg, #F6E2B4, var(--gold-bright));
  border-color: var(--gold-bright);
}

.btn--ghost { color: var(--paper-soft); border-color: rgba(140, 155, 149, 0.45); }
.btn--ghost:hover { color: var(--gold-bright); border-color: var(--gold); background: rgba(198, 161, 91, 0.1); }

.btn--paper {
  color: var(--ink-text);
  background: var(--paper);
  border-color: var(--paper-line);
}
.btn--paper:hover { color: var(--ink-text); background: #FDF8EC; border-color: var(--gold); }

.breadcrumb {
  margin: 0 0 clamp(1.2rem, 3vw, 2rem);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li { display: flex; align-items: center; gap: 0.5rem; }
.breadcrumb li + li::before { content: "/"; color: rgba(140, 155, 149, 0.45); }
.breadcrumb a { color: rgba(244, 238, 223, 0.75); }
.breadcrumb a:hover { color: var(--gold-bright); }
.breadcrumb [aria-current="page"] { color: var(--gold); }

.card {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  background: linear-gradient(168deg, rgba(31, 92, 74, 0.42) 0%, rgba(6, 26, 21, 0.78) 100%);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
}
.card > :last-child { margin-bottom: 0; }
.card h3 { margin-bottom: 0.5em; color: var(--paper); }

.card--outline { background: transparent; }

.card--paper {
  background: var(--paper);
  color: var(--ink-text);
  border-color: var(--paper-line);
}
.card--paper h3,
.card--paper h2 { color: var(--ink-text); }
.card--paper .section-label { color: var(--clay); }
.card--paper a { color: #8A5A21; }
.card--paper a:hover { color: var(--clay); }

.card--lift { position: relative; }

.paper {
  position: relative;
  padding: clamp(1.2rem, 3vw, 2.1rem);
  background: var(--paper);
  color: var(--ink-text);
  border: 1px solid var(--paper-line);
  border-radius: 2px;
  box-shadow: var(--shadow-paper);
}
.paper::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(16, 32, 27, 0.1);
  pointer-events: none;
}
.paper h2, .paper h3, .paper h4 { color: var(--ink-text); }
.paper a { color: #8A5A21; text-decoration: underline; text-underline-offset: 0.2em; }
.paper a:hover { color: var(--clay); }
.paper > :last-child { margin-bottom: 0; }

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.62rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: rgba(244, 238, 223, 0.82);
  background: rgba(6, 26, 21, 0.45);
  border: 1px solid rgba(140, 155, 149, 0.45);
  border-radius: 999px;
  transition: transform 0.22s ease, border-color 0.22s ease, color 0.22s ease;
}
.tag-cloud .tag:hover {
  transform: translateY(-2px);
  border-color: rgba(232, 201, 138, 0.78);
  color: var(--gold-bright);
}
.tag--gold { color: var(--gold-bright); border-color: rgba(198, 161, 91, 0.62); }
.tag--clay { color: #E39B77; border-color: rgba(201, 111, 69, 0.62); }
.tag--focus { color: var(--cyan); border-color: rgba(63, 208, 201, 0.62); }

.figure { margin: 0; display: grid; gap: 0.7rem; }

.figure__media {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-gold);
  border-radius: 2px;
  background:
    radial-gradient(120% 110% at 18% 0%, rgba(63, 208, 201, 0.16) 0%, transparent 62%),
    linear-gradient(158deg, #10382C 0%, #061A15 100%);
  color: rgba(140, 155, 149, 0.75);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.figure__media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__media--wide { aspect-ratio: 16 / 9; }
.figure__media--tall { aspect-ratio: 3 / 4; }

.figure__caption {
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 9. 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 10. 响应式 ---------- */
@media (min-width: 901px) {
  .card--lift { transform: translateY(-1.2rem); }
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand__desc { max-width: 46ch; }
}

@media (max-width: 900px) {
  .grid--two,
  .grid--three,
  .grid--asym { grid-template-columns: 1fr; }
  .section + .section { border-top-style: dashed; }
}

@media (max-width: 860px) {
  body { font-size: 15px; }

  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 0.4rem;
    padding-block: 0.85rem 0.78rem;
  }
  .masthead-meta { font-size: 0.58rem; letter-spacing: 0.18em; }
  .masthead-meta--left { text-align: center; }
  .masthead-meta--right { display: none; }
  .masthead-brand__cn { font-size: 1.16rem; letter-spacing: 0.22em; text-indent: 0.22em; }
  .masthead-brand__latin { font-size: 0.52rem; letter-spacing: 0.34em; text-indent: 0.34em; }

  .nav-bar__inner {
    justify-content: flex-start;
    min-height: 50px;
  }

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

  .nav-cta { display: none; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: linear-gradient(180deg, #08221B 0%, #061A15 100%);
    border-top: 1px solid var(--line-gold);
    border-bottom: 1px solid var(--line-gold);
    box-shadow: 0 26px 40px -28px rgba(0, 0, 0, 0.95);
    transition: max-height 0.34s ease;
  }
  .primary-nav[data-open="true"] {
    max-height: 26rem;
    overflow-y: auto;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.35rem var(--gutter) 1rem;
  }
  .primary-nav__list li + li { border-top: 1px solid rgba(140, 155, 149, 0.16); }
  .primary-nav__list a {
    display: block;
    padding: 0.86rem 0;
    font-size: 0.95rem;
    letter-spacing: 0.14em;
  }
  .primary-nav__list a::after { display: none; }
  .primary-nav__list a[aria-current="page"]::before {
    content: "›";
    margin-right: 0.55rem;
    color: var(--gold-bright);
  }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-brand { grid-column: auto; }
  .footer-brand__desc { max-width: none; }
  .footer-legal { flex-direction: column; align-items: flex-start; }

  [id] { scroll-margin-top: 7.5rem; }
}

@media (max-width: 420px) {
  .masthead-brand__cn { font-size: 1.04rem; letter-spacing: 0.16em; text-indent: 0.16em; }
  .nav-toggle { padding: 0.44rem 0.7rem; font-size: 0.66rem; }
  .footer-contact__row { grid-template-columns: 1fr; gap: 0.15rem; }
  .footer-contact__key { padding-top: 0; }
}

/* ---------- 11. 降低动效 ---------- */
@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;
  }

  .reveal { opacity: 1; transform: none; }
  .reading-progress__bar { transition: none; }
  .tag-cloud .tag:hover { transform: none; }
  .card--lift { transform: none; }
}