:root {
  --ink: #232119;
  --muted: #716c5f;
  --paper: #efe9da;
  --paper-2: #f8f4ea;
  --line: #cfc4ad;
  --red: #a7352e;
  --green: #356b4b;
  --blue: #355d75;
  --gold: #aa7b2b;
  --shadow: 0 14px 35px rgba(50, 43, 29, .12);
  --radius: 20px;
  --spring: #5d7f4d;
  --summer: #c58b26;
  --autumn: #a85335;
  --winter: #486a7b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(255,255,255,.7), transparent 28rem),
    linear-gradient(180deg, #f3eddf, var(--paper));
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans CJK SC", Arial, sans-serif;
}
button, input, select { font: inherit; }
button { color: inherit; }
.paper-noise {
  position: fixed; inset: 0; pointer-events: none; opacity: .26; z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E");
}
.site-header {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 24px;
  min-height: 74px; padding: 10px clamp(16px, 3vw, 44px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: rgba(239,233,218,.88); backdrop-filter: blur(18px);
}
.brand { display:flex; gap:10px; align-items:center; text-decoration:none; color:inherit; margin-right:auto; }
.brand-mark {
  display:grid; place-items:center; width:44px; height:52px; border-radius:8px;
  background:#fbfaf5; border:1px solid #bdb29b; box-shadow:0 3px 0 #b9ad92, 0 7px 15px rgba(40,34,23,.12);
  color:var(--green); font-family:serif; font-weight:800; font-size:25px;
}
.brand strong { display:block; letter-spacing:.03em; }
.brand small { display:block; color:var(--muted); margin-top:2px; letter-spacing:.08em; font-size:11px; text-transform:uppercase; }
.main-nav { display:flex; gap:4px; }
.main-nav button, .menu-button {
  border:0; background:transparent; padding:10px 12px; border-radius:999px; cursor:pointer;
}
.main-nav button:hover, .main-nav button.active { background:rgba(255,255,255,.62); }
.menu-button { display:none; font-size:22px; }
main { width:min(1380px, 100%); margin:0 auto; padding:clamp(24px,4vw,58px) clamp(16px,3vw,42px) 80px; min-height:calc(100vh - 140px); }
footer { display:flex; justify-content:space-between; gap:20px; padding:24px clamp(16px,3vw,44px); border-top:1px solid var(--line); color:var(--muted); font-size:12px; }

.hero { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr); gap:clamp(30px,6vw,90px); align-items:center; min-height:70vh; }
.eyebrow { text-transform:uppercase; letter-spacing:.17em; font-size:11px; color:var(--muted); font-weight:700; }
h1 { font-family: ui-serif, Georgia, "Noto Serif CJK SC", serif; font-size:clamp(54px,8vw,118px); line-height:.86; margin:16px 0 22px; letter-spacing:-.045em; }
h1 .cn { display:block; color:var(--red); letter-spacing:.02em; font-size:.67em; margin-bottom:12px; }
.lede { font-size:clamp(18px,2vw,25px); line-height:1.45; max-width:690px; color:#423d32; }
.hero-actions { display:flex; gap:12px; flex-wrap:wrap; margin-top:30px; }
.primary, .secondary, .ghost, .dangerless {
  border:1px solid var(--ink); border-radius:999px; padding:12px 18px; cursor:pointer; transition:.18s ease;
}
.primary { background:var(--ink); color:var(--paper-2); }
.primary:hover { transform:translateY(-2px); box-shadow:0 8px 18px rgba(35,33,25,.15); }
.secondary { background:rgba(255,255,255,.48); }
.secondary:hover, .ghost:hover { background:#fff; }
.ghost { background:transparent; border-color:var(--line); }
.dangerless { background:transparent; border-color:var(--red); color:var(--red); }
.hero-table { position:relative; min-height:530px; display:grid; place-items:center; }
.season-orbit { width:min(490px,90vw); aspect-ratio:1; border:1px solid var(--line); border-radius:50%; position:relative; background:rgba(255,255,255,.28); box-shadow: inset 0 0 80px rgba(255,255,255,.45); }
.season-orbit::before { content:"麦"; position:absolute; inset:26%; display:grid; place-items:center; border-radius:50%; background:var(--ink); color:var(--paper); font:700 clamp(74px,9vw,116px)/1 serif; box-shadow:var(--shadow); }
.orbit-tile { position:absolute; transform:translate(-50%,-50%) rotate(var(--r)); left:var(--x); top:var(--y); }
.orbit-tile .mahjong-tile { transform:rotate(calc(var(--r) * -1)); }

.section-head { display:flex; align-items:end; justify-content:space-between; gap:20px; margin-bottom:30px; }
.section-head h2 { margin:7px 0 0; font-family:ui-serif,Georgia,serif; font-size:clamp(38px,5vw,68px); letter-spacing:-.035em; }
.section-head p { margin:0; max-width:680px; color:var(--muted); line-height:1.55; }
.panel { background:rgba(255,255,255,.44); border:1px solid var(--line); border-radius:var(--radius); box-shadow:0 9px 22px rgba(52,43,25,.06); }
.controls { display:flex; gap:10px; flex-wrap:wrap; align-items:center; padding:14px; margin-bottom:20px; }
.controls label { display:flex; gap:8px; align-items:center; color:var(--muted); font-size:13px; }
.controls input, .controls select { border:1px solid var(--line); background:#fffdf8; border-radius:10px; padding:9px 11px; color:var(--ink); }
.seed-input { min-width:220px; }
.stat-row { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin:22px 0; }
.stat-card { padding:18px; }
.stat-card strong { font-size:29px; display:block; font-family:ui-serif,Georgia,serif; }
.stat-card span { color:var(--muted); font-size:12px; }

.season-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:14px; }
.season-card { padding:20px; min-height:240px; position:relative; overflow:hidden; }
.season-card::after { content:attr(data-char); position:absolute; right:-5px; bottom:-30px; font:700 120px/1 serif; opacity:.06; }
.season-card h3 { margin:4px 0 2px; font-size:25px; }
.season-card .flower-name { font-family:ui-serif,Georgia,serif; font-size:36px; margin:18px 0 5px; }
.season-card small { color:var(--muted); }
.season-card.spring { border-top:5px solid var(--spring); }
.season-card.summer { border-top:5px solid var(--summer); }
.season-card.autumn { border-top:5px solid var(--autumn); }
.season-card.winter { border-top:5px solid var(--winter); }

.builder-matrix { overflow:auto; padding-bottom:8px; }
.matrix { display:grid; grid-template-columns:150px repeat(4,minmax(220px,1fr)); gap:10px; min-width:1050px; }
.matrix-head, .matrix-season { padding:13px 10px; display:flex; align-items:center; gap:8px; color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:.1em; }
.deck-card { text-align:left; border:1px solid var(--line); background:rgba(255,255,255,.48); border-radius:16px; padding:15px; cursor:pointer; min-height:135px; transition:.18s ease; }
.deck-card:hover { background:#fffdf8; transform:translateY(-2px); box-shadow:0 9px 20px rgba(43,36,24,.09); }
.deck-card strong { display:flex; align-items:center; justify-content:space-between; gap:8px; font-size:16px; }
.deck-card .big-char { font:700 30px/1 serif; }
.deck-mini { display:grid; grid-template-columns:repeat(10,1fr); gap:3px; margin-top:15px; }
.deck-mini i { display:block; aspect-ratio:1; border-radius:3px; background:#d9d0bd; }
.deck-mini i.dragon-r { background:#b44a40; }
.deck-mini i.dragon-g { background:#4f7659; }
.deck-mini i.dragon-w { background:#f7f4ea; border:1px solid #bfb5a0; }

.deck-view { margin-top:28px; }
.deck-head { display:flex; align-items:flex-start; justify-content:space-between; gap:20px; margin-bottom:20px; }
.deck-head h3 { font-family:ui-serif,Georgia,serif; font-size:36px; margin:0; }
.deck-head p { color:var(--muted); margin:5px 0 0; }
.tiles-grid { display:grid; grid-template-columns:repeat(10,minmax(62px,1fr)); gap:11px; }
.mahjong-tile {
  position:relative; min-height:98px; aspect-ratio:.72; border:1px solid #bfb39a; border-bottom-width:5px; border-radius:9px;
  background:linear-gradient(145deg,#fffef9,#eee8d8); box-shadow:0 6px 12px rgba(54,45,27,.12); cursor:pointer; padding:8px 5px;
  display:flex; flex-direction:column; align-items:center; justify-content:center; transition:.16s ease;
}
.mahjong-tile:hover { transform:translateY(-4px) rotate(.4deg); box-shadow:0 11px 20px rgba(54,45,27,.16); }
.tile-glyph { font:700 clamp(26px,3vw,38px)/1 serif; }
.tile-sub { font-size:9px; color:var(--muted); margin-top:7px; text-align:center; line-height:1.15; }
.mahjong-tile[data-suit="筒"] .tile-glyph { color:var(--blue); }
.mahjong-tile[data-suit="索"] .tile-glyph { color:var(--green); }
.mahjong-tile[data-suit="萬"] .tile-glyph { color:var(--red); }
.mahjong-tile[data-dragon="中"] .tile-glyph { color:var(--red); font-size:43px; }
.mahjong-tile[data-dragon="發"] .tile-glyph { color:var(--green); font-size:43px; }
.mahjong-tile[data-dragon="白"] .tile-glyph { color:#757064; font-size:25px; border:3px solid #718ca1; width:43px; height:54px; display:grid; place-items:center; }

.balance-strip { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; margin:18px 0; }
.balance-strip > div { padding:12px 13px; border:1px solid var(--line); border-radius:12px; background:rgba(255,255,255,.35); }
.balance-strip strong { display:block; font-size:12px; }
.balance-strip span { font-size:11px; color:var(--muted); }

.library-layout { display:grid; grid-template-columns:270px minmax(0,1fr); gap:22px; }
.filters { padding:17px; position:sticky; top:95px; align-self:start; }
.filters h3 { margin:0 0 15px; }
.filter-group { margin:16px 0; }
.filter-group label { display:block; font-size:12px; color:var(--muted); margin-bottom:7px; }
.filter-group input, .filter-group select { width:100%; border:1px solid var(--line); background:#fffdf8; border-radius:10px; padding:10px; }
.action-list { display:grid; gap:10px; }
.action-row { display:grid; grid-template-columns:78px minmax(0,1fr) auto; gap:16px; align-items:center; padding:14px 16px; cursor:pointer; }
.action-row:hover { background:rgba(255,255,255,.67); }
.action-row h4 { margin:0 0 4px; font-size:15px; }
.action-row p { margin:0; color:var(--muted); font-size:12px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.kind-pill { padding:5px 8px; border-radius:999px; border:1px solid var(--line); font-size:10px; text-transform:uppercase; letter-spacing:.07em; white-space:nowrap; }
.tile-chip { font-family:serif; font-size:21px; }

.rules-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.rule-card { padding:24px; }
.rule-card h3 { margin:0 0 10px; font-size:22px; }
.rule-card p, .rule-card li { color:#514b3e; line-height:1.55; }
.rule-card code { background:#e7decb; padding:2px 6px; border-radius:5px; }
.flow-line { display:flex; gap:8px; align-items:center; flex-wrap:wrap; margin-top:16px; }
.flow-line span { border:1px solid var(--line); border-radius:999px; padding:8px 10px; background:#fffaf0; }

.session-workspace { display:grid; grid-template-columns:minmax(0,1fr) 360px; gap:20px; align-items:start; }
.session-stage { padding:24px; min-height:560px; }
.session-sidebar { padding:18px; position:sticky; top:95px; }
.session-seasons { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:22px; }
.season-tab { flex:1; min-width:110px; border:1px solid var(--line); background:transparent; border-radius:12px; padding:10px; cursor:pointer; text-align:left; }
.season-tab.active { background:#fff; box-shadow:0 5px 12px rgba(40,33,20,.08); }
.draw-zone { display:grid; place-items:center; min-height:390px; text-align:center; }
.draw-zone .mahjong-tile { width:150px; min-height:205px; font-size:1.4em; }
.draw-action { max-width:680px; margin:22px auto 0; }
.draw-action h3 { font-family:ui-serif,Georgia,serif; font-size:32px; margin:8px 0 10px; }
.draw-action p { line-height:1.55; }
.progress { height:9px; background:#d8cfbe; border-radius:99px; overflow:hidden; margin:12px 0; }
.progress i { display:block; height:100%; background:var(--ink); border-radius:99px; }
.history { display:grid; gap:7px; max-height:340px; overflow:auto; }
.history button { border:1px solid var(--line); background:#fffaf1; border-radius:9px; padding:8px; text-align:left; cursor:pointer; font-size:11px; }

.action-dialog { width:min(720px,calc(100vw - 28px)); border:1px solid var(--line); border-radius:24px; padding:0; color:var(--ink); background:#f7f1e4; box-shadow:0 35px 90px rgba(28,23,16,.28); }
.action-dialog::backdrop { background:rgba(31,27,20,.45); backdrop-filter:blur(3px); }
.dialog-close { position:absolute; right:14px; top:12px; border:0; background:transparent; font-size:28px; cursor:pointer; }
#dialogBody { padding:34px; }
.dialog-tile { float:left; margin:0 22px 14px 0; width:92px; }
.dialog-tile .mahjong-tile { width:90px; min-height:125px; }
#dialogBody h2 { font-family:ui-serif,Georgia,serif; margin:8px 36px 12px 0; font-size:32px; }
#dialogBody p { line-height:1.6; }
.source-list { clear:both; border-top:1px solid var(--line); margin-top:22px; padding-top:16px; color:var(--muted); font-size:12px; }

.notice { border:1px solid var(--gold); background:#f8efd9; border-radius:14px; padding:12px 15px; color:#6a5128; font-size:12px; line-height:1.45; }
.empty { padding:50px; text-align:center; color:var(--muted); }

@media (max-width: 1050px) {
  .hero { grid-template-columns:1fr; }
  .hero-table { order:-1; min-height:410px; }
  .season-orbit { width:380px; }
  .season-grid { grid-template-columns:repeat(2,1fr); }
  .tiles-grid { grid-template-columns:repeat(6,1fr); }
  .session-workspace { grid-template-columns:1fr; }
  .session-sidebar { position:static; }
}
@media (max-width: 760px) {
  .main-nav { display:none; position:absolute; top:68px; right:14px; flex-direction:column; background:#f5efe1; border:1px solid var(--line); border-radius:14px; padding:7px; box-shadow:var(--shadow); }
  .main-nav.open { display:flex; }
  .menu-button { display:block; }
  .hero-table { min-height:330px; }
  .season-orbit { width:300px; }
  .section-head { align-items:flex-start; flex-direction:column; }
  .season-grid, .stat-row, .rules-grid { grid-template-columns:1fr; }
  .tiles-grid { grid-template-columns:repeat(4,1fr); gap:8px; }
  .mahjong-tile { min-height:86px; }
  .library-layout { grid-template-columns:1fr; }
  .filters { position:static; }
  .action-row { grid-template-columns:58px 1fr; }
  .action-row .kind-pill { display:none; }
  footer { flex-direction:column; }
  .balance-strip { grid-template-columns:1fr; }
}