:root {
  --void: #070605;
  --lacquer: #100e0c;
  --panel: #161310;
  --panel-2: #1c1814;
  --ink: #f4ead3;
  --ink-dim: #c4b49a;
  --ink-mute: #8d7c64;
  --gold: #d4b36a;
  --gold-soft: #e8d090;
  --gold-deep: #8c6a32;
  --cinnabar: #b4332a;
  --cinnabar-deep: #8a241e;
  --line: rgba(212, 179, 106, 0.28);
  --line-strong: rgba(212, 179, 106, 0.55);
  --serif: "Kaiti SC", "STKaiti", "KaiTi", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html {
  background: var(--void);
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--void);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

button, input { font: inherit; color: inherit; }
a { color: inherit; }

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background: url("../img/grain.jpg") center / 520px;
  opacity: 0.14;
  mix-blend-mode: screen;
}

#app { position: relative; z-index: 1; }

.noscript {
  margin: 24px 16px;
  padding: 16px;
  border: 1px solid var(--line);
  color: var(--ink-dim);
}

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

/* —— 顶栏 —— */
.nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 16px 0;
}

.page-home .brand-text { display: none; }

.page-game .nav {
  position: sticky;
  top: 0;
  padding: 14px 16px;
  background: linear-gradient(var(--void), rgba(7, 6, 5, 0.92) 70%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.seal {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid var(--gold);
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1;
}

.brand-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.2;
}

.brand-sub {
  margin: 3px 0 0;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.28em;
}

.nav-link {
  color: var(--gold-soft);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.28em;
  padding: 8px 2px;
  border-bottom: 1px solid var(--line);
}

/* —— 首页英雄 —— */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--ink);
}

.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 70% 82%;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 6, 5, 0.42) 0%, rgba(7, 6, 5, 0.5) 36%, rgba(7, 6, 5, 0.78) 68%, rgba(7, 6, 5, 0.94) 100%),
    linear-gradient(90deg, rgba(7, 6, 5, 0.5), transparent 24%, transparent 76%, rgba(7, 6, 5, 0.5));
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(920px, calc(100% - 40px));
  padding: 8px 0 120px;
  text-align: center;
}

.hero-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.42em;
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(34px, 7vw, 68px);
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.2;
  text-indent: 0.18em;
}

.double-rule {
  width: 72px;
  height: 7px;
  margin: 22px auto 18px;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  opacity: 0.9;
}

.hero-lede {
  margin: 0 auto;
  max-width: 28em;
  color: var(--ink-dim);
  font-size: 15px;
  letter-spacing: 0.08em;
}

.hero-enter {
  position: absolute;
  left: 50%;
  bottom: 28px;
  z-index: 2;
  display: inline-block;
  margin-top: 0;
  color: var(--gold-soft);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.36em;
  transform: translateX(-50%);
}

.hero-enter span {
  display: block;
  margin: 10px auto 0;
  width: 1px;
  height: 36px;
  background: linear-gradient(var(--gold), transparent);
}

.frame {
  position: absolute;
  inset: 14px;
  z-index: 3;
  pointer-events: none;
  color: var(--gold);
}

.frame-c {
  position: absolute;
  width: 56px;
  height: 56px;
}

.frame-c svg { display: block; width: 100%; height: 100%; }

.frame-tl { top: 0; left: 0; }
.frame-tr { top: 0; right: 0; transform: scaleX(-1); }
.frame-bl { bottom: 0; left: 0; transform: scaleY(-1); }
.frame-br { bottom: 0; right: 0; transform: scale(-1); }

/* —— 棋席 —— */
.hall {
  position: relative;
  padding: 56px 0 72px;
  background:
    linear-gradient(180deg, rgba(7, 6, 5, 0.96), var(--lacquer) 40%);
}

.hall-head {
  text-align: center;
  margin-bottom: 28px;
}

.kicker {
  margin: 0;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.42em;
}

.hall-head h2,
.mast h1 {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hall-head h2 {
  font-size: clamp(28px, 4vw, 40px);
}

.hall-note {
  margin: 10px 0 0;
  color: var(--ink-mute);
  font-size: 14px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.chip {
  padding: 6px 0;
  border: 0;
  background: none;
  color: var(--ink-mute);
  cursor: pointer;
  letter-spacing: 0.18em;
  font-size: 13px;
}

.chip[aria-pressed="true"] {
  color: var(--gold-soft);
  box-shadow: inset 0 -1px 0 var(--gold);
}

.search {
  flex: 1 1 180px;
  min-width: 0;
  max-width: 280px;
}

.search input {
  width: 100%;
  min-height: 40px;
  padding: 6px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  letter-spacing: 0.08em;
}

.search input::placeholder { color: var(--ink-mute); }
.search input:focus { outline: none; border-bottom-color: var(--gold); }

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.poster {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  text-decoration: none;
  overflow: hidden;
}

.poster-art {
  position: relative;
  height: 210px;
  display: grid;
  place-items: center;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(7, 6, 5, 0.08), rgba(7, 6, 5, 0.55)),
    url("../img/table.jpg") center / cover;
}

.poster-art svg,
.poster-art .mark-fallback {
  width: min(236px, 78%);
  height: auto;
  filter: drop-shadow(0 8px 14px rgba(0, 0, 0, 0.35));
}

.poster-no {
  position: absolute;
  top: 12px;
  left: 14px;
  color: var(--gold);
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.22em;
}

.poster-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 20px 20px 18px;
}

.poster-genre {
  margin: 0;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.28em;
}

.poster-name {
  margin: 6px 0 0;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.25;
}

.poster-alias {
  margin: 4px 0 0;
  color: var(--ink-mute);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.poster-sum {
  margin: 12px 0 0;
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.actions .btn { flex: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 8px 16px;
  border-radius: 1px;
  border: 1px solid transparent;
  text-decoration: none;
  letter-spacing: 0.22em;
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
}

.btn-solid {
  background: linear-gradient(#c4453c, var(--cinnabar-deep));
  color: #f8e7c2;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--gold-soft);
}

.btn-block { width: 100%; }

.empty {
  padding: 48px 8px;
  color: var(--ink-mute);
  text-align: center;
  letter-spacing: 0.12em;
}

.mark-fallback {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--gold);
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 48px;
  background: rgba(16, 14, 12, 0.45);
}

.guide {
  width: min(760px, 100%);
  margin: 64px auto 0;
  padding: 30px 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.guide h2 {
  margin: 8px 0 12px;
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: 0.14em;
}

.guide > p:last-child {
  margin: 0;
  color: var(--ink-dim);
}

.reading {
  margin: 64px auto 0;
  text-align: center;
}

.reading > h2 {
  margin: 8px 0 24px;
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: 0.14em;
}

.reading-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  text-align: left;
}

.reading-card,
.related-link {
  display: block;
  border: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  background: var(--panel);
}

.reading-card { padding: 22px; }

.reading-card:hover,
.related-link:hover { border-color: var(--line-strong); }

.reading-tag {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.24em;
}

.reading-card h3 {
  margin: 6px 0 8px;
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 20px;
}

.reading-card p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14px;
}

.static-copy {
  width: min(900px, calc(100% - 32px));
  margin: 48px auto;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.static-copy h1,
.static-copy h2 {
  color: var(--gold-soft);
  font-family: var(--serif);
}

.static-copy a { color: var(--gold-soft); }

/* —— 规则页 —— */
.mast {
  position: relative;
  isolation: isolate;
  padding: 36px 18px 48px;
  text-align: center;
}

.mast-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(7, 6, 5, 0.55) 0%, rgba(7, 6, 5, 0.72) 48%, rgba(7, 6, 5, 0.94) 100%),
    url("../img/table.jpg") center 30% / cover;
}

.mast-copy {
  position: relative;
  width: min(36em, 100%);
  margin: 0 auto;
  padding: 0 8px;
}

.mast-copy::before {
  content: "";
  position: absolute;
  inset: -18px -28px;
  z-index: -1;
  background: radial-gradient(ellipse at center, rgba(7, 6, 5, 0.78) 0%, rgba(7, 6, 5, 0.2) 62%, transparent 78%);
}

.mast h1,
.mast .kicker,
.mast .about {
  text-shadow: 0 1px 2px #000, 0 0 16px rgba(0, 0, 0, 0.85);
}

.mast .kicker { margin-bottom: 6px; }

.mast h1 {
  font-size: clamp(36px, 6vw, 56px);
  text-indent: 0.12em;
}

.mast .about {
  margin: 16px auto 0;
  max-width: 18em;
  color: var(--ink);
  white-space: pre-line;
}

.page-game .grain { opacity: 0.08; }

.page-game .main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 48px;
  padding: 28px 22px 36px;
  background: rgba(12, 10, 8, 0.78);
  border: 1px solid var(--line);
}

.block { margin-top: 36px; }

.block h2 {
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  margin: 0 0 20px;
}

.step-no {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--gold);
  color: var(--gold-soft);
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1;
}

.step-title {
  margin: 6px 0 0;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.step-text {
  margin: 4px 0 0;
  color: var(--ink-dim);
  white-space: pre-line;
}

.rule-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.rule-list li {
  position: relative;
  margin: 0 0 10px;
  padding-left: 18px;
  color: var(--ink-dim);
}

.rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--gold);
}

.related-list {
  display: grid;
  gap: 10px;
}

.related-link { padding: 16px 18px; }

.related-link strong {
  display: block;
  color: var(--gold-soft);
}

.related-link span {
  display: block;
  margin-top: 4px;
  color: var(--ink-dim);
  font-size: 14px;
}

.article-main p,
.article-main li { color: var(--ink-dim); }

.article-main h3 {
  margin: 22px 0 8px;
  color: var(--ink);
  font-size: 17px;
}

.article-main ul,
.article-main ol { padding-left: 1.4em; }

.article-main a { color: var(--gold-soft); }

.article-lede {
  margin: 0;
  color: var(--ink) !important;
  font-size: 18px;
}

.article-figure {
  margin: 24px 0;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--panel-2);
}

.article-figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
}

.article-figure figcaption {
  margin-top: 12px;
  color: var(--ink-mute);
  font-size: 13px;
  text-align: center;
}

.pattern-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.pattern-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 18px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.pattern-item svg { width: 132px; height: 132px; }
.pattern-item h3 { margin-top: 0; }
.pattern-item p { margin-bottom: 0; }

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

.compare-table th,
.compare-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare-table th { color: var(--gold-soft); }

.article-note {
  padding: 14px 16px;
  border-left: 2px solid var(--gold);
  background: rgba(212, 179, 106, 0.06);
}

.note {
  margin: 10px 0 0;
  color: var(--ink-mute);
  font-size: 13px;
}

.dock {
  margin-top: 36px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.addr {
  margin: 12px 0 0;
  color: var(--ink-mute);
  font-size: 12px;
  text-align: center;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.foot {
  padding: 8px 16px 36px;
  color: var(--ink-mute);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: center;
}

.foot p { margin: 0 auto; max-width: 42em; }

.foot-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 18px;
  margin: 0 auto 10px;
}

.foot-links a {
  color: var(--ink-dim);
  text-decoration: none;
}

.foot-links a:hover { color: var(--gold-soft); }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 3px;
}

@media (max-width: 899px) {
  body.page-game .main {
    margin-bottom: 24px;
    padding-bottom: 24px;
  }

  body.page-game .foot {
    padding-bottom: calc(168px + env(safe-area-inset-bottom));
  }

  body.page-game .dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    margin: 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    background: #14110e;
  }
}

@media (min-width: 720px) {
  .page-home .brand-text { display: block; }
  .nav, .page-game .nav { padding-left: 28px; padding-right: 28px; }
  .gallery { grid-template-columns: 1fr 1fr; gap: 22px; }
  .poster { min-height: 100%; }
  .poster-art { height: 230px; }
  .reading-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 560px) {
  .pattern-item { grid-template-columns: 1fr; }
  .pattern-item svg { margin: 0 auto; }
  .compare-table { font-size: 14px; }
  .compare-table th,
  .compare-table td { padding: 9px 6px; }
}

@media (min-width: 900px) {
  .hero-inner { padding-bottom: 72px; }
  .hall { padding: 72px 0 96px; }
  .poster-name { font-size: 32px; }
  .page-game .main { padding: 36px 40px 48px; }

  .detail {
    display: block;
  }

  .dock {
    position: static;
    margin-top: 40px;
  }
}

@media (hover: hover) {
  .btn-solid:hover { background: linear-gradient(#d2554b, #7a1f1a); }
  .btn-ghost:hover { border-color: var(--gold); color: var(--gold-soft); background: rgba(212, 179, 106, 0.06); }
  .poster:hover { border-color: var(--line-strong); }
  .nav-link:hover { color: var(--gold); }
  .chip:hover { color: var(--gold-soft); }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-inner {
    animation: rise 1.15s ease both;
  }

  .poster {
    transition: border-color 0.25s ease, transform 0.25s ease;
  }

  .poster:hover { transform: translateY(-4px); }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}