:root{
  --bg:#FBF8F3; --bg-2:#F5EFE6; --card:#FFFFFF;
  --ink:#3A2E27; --ink-2:#6B5C50; --ink-3:#9A8A7C;
  --line:#E9DFD2; --line-2:#F1E9DE;
  --brand:#E4763C; --brand-dark:#C85C27; --brand-soft:#FDEDE1;
  --mint:#5E9C7B; --mint-soft:#EAF4EE;
  --danger:#D9483B; --danger-soft:#FDECEA;
  --shadow:0 2px 4px rgba(80,55,35,.03), 0 12px 32px rgba(80,55,35,.07);
  --shadow-lg:0 8px 16px rgba(80,55,35,.05), 0 28px 64px rgba(80,55,35,.12);
  --r:18px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --regions:#F7D9C4,#CFE4D8,#DADDF3,#F5E7B6,#F3CCD6,#C9E2EE,#E5D8C6,#D9E9C8,#EAD0BD;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.75;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:radial-gradient(760px 420px at 12% -6%,#FFF1E3 0%,transparent 70%),radial-gradient(680px 420px at 92% 8%,#EAF3EC 0%,transparent 72%)}
a{color:var(--brand-dark);text-decoration:none}
a:hover{text-decoration:underline}
button{font:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:12px;top:12px}

/* header */
.site-header{position:sticky;top:0;z-index:40;background:rgba(251,248,243,.86);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line-2)}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--brand-soft);display:grid;place-items:center;color:var(--brand-dark)}
.brand-mark svg{width:21px;height:21px}
.brand small{font-size:11px;font-weight:600;color:var(--ink-3);letter-spacing:.08em;margin-left:2px}
.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center}
.nav-links a{font-size:14px;color:var(--ink-2);font-weight:600}
.nav-links a:hover{color:var(--brand-dark)}
.nav-badge{font-size:12px;font-weight:700;color:var(--mint);background:var(--mint-soft);border:1px solid #D6E9DC;padding:5px 12px;border-radius:99px;white-space:nowrap}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:66px 0 60px}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand-dark);margin:0 0 18px;text-transform:uppercase}
h1{font-size:clamp(34px,4.4vw,54px);line-height:1.2;letter-spacing:-.035em;margin:0 0 20px;font-weight:850}
h1 .accent{color:var(--brand);white-space:nowrap;background:linear-gradient(transparent 76%,#FBE0C8 76%,#FBE0C8 94%,transparent 94%)}
.lede{font-size:17px;color:var(--ink-2);margin:0 0 26px;max-width:520px}
.usp{list-style:none;padding:0;margin:0 0 30px;display:flex;flex-wrap:wrap;gap:10px}
.usp li{font-size:13px;font-weight:650;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:99px;padding:7px 14px;display:flex;align-items:center;gap:7px}
.usp li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint)}
.btn-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--brand);color:#fff;border:1px solid var(--brand);border-radius:12px;padding:13px 24px;font-weight:750;font-size:15px;box-shadow:0 6px 18px rgba(228,118,60,.24);transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{background:var(--brand-dark);text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 24px rgba(228,118,60,.3)}
.btn.ghost{background:#fff;color:var(--ink-2);border-color:var(--line);box-shadow:none}
.btn.ghost:hover{background:var(--bg-2);color:var(--ink);transform:none;box-shadow:none}
.btn svg{width:17px;height:17px}
.fine{font-size:12.5px;color:var(--ink-3);margin:16px 0 0}

/* hero art */
.hero-art{position:relative;display:flex;justify-content:center}
.art-card{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:var(--shadow-lg);transform:rotate(2deg);width:min(100%,384px)}
.art-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;font-size:12px;color:var(--ink-3);font-weight:700}
.art-head b{color:var(--brand-dark);font-size:13px}
.mini-board{display:grid;gap:3px;aspect-ratio:1;border-radius:14px;overflow:hidden;background:#fff}
.mini-cell{border-radius:6px;display:grid;place-items:center;position:relative;min-width:0;min-height:0;overflow:hidden;contain:layout paint}
.mini-cell svg{position:absolute;left:19%;top:19%;width:62%;height:62%;color:#4A3728}
.mini-foot{display:flex;align-items:center;gap:8px;margin-top:15px;font-size:12px;color:var(--ink-3)}
.mini-foot .dot{width:7px;height:7px;border-radius:50%;background:var(--mint)}
.art-sticker{position:absolute;right:-14px;bottom:-18px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 14px;box-shadow:var(--shadow);font-size:12.5px;font-weight:700;color:var(--ink-2);transform:rotate(-4deg);display:flex;align-items:center;gap:8px}
.art-sticker svg{width:18px;height:18px;color:var(--brand)}

/* sections */
section{scroll-margin-top:86px}
.section-head{margin:0 0 26px}
.section-head h2{font-size:clamp(24px,2.8vw,32px);letter-spacing:-.025em;margin:0 0 8px;font-weight:820}
.section-head p{color:var(--ink-2);margin:0;font-size:15px;max-width:720px}
.tag{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.14em;color:var(--brand-dark);text-transform:uppercase;margin-bottom:10px}
.content-section{padding:56px 0;border-top:1px solid var(--line-2)}

/* game */
.game-section{padding:8px 0 60px}
.game-shell{background:var(--card);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow-lg);overflow:hidden}
.game-top{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:18px 22px;border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,#FFFDFB,#fff)}
.segmented{display:inline-flex;background:var(--bg-2);border:1px solid var(--line);border-radius:11px;padding:3px;gap:2px}
.segmented button{border:0;background:transparent;color:var(--ink-2);font-size:13px;font-weight:700;padding:8px 14px;border-radius:8px;transition:.15s}
.segmented button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(80,55,35,.1)}
.top-label{font-size:12px;color:var(--ink-3);font-weight:700}
.top-spacer{flex:1}
.puzzle-id{font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.puzzle-id b{color:var(--ink-2)}
.game-body{display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:0}
.board-panel{padding:22px 26px 26px;border-right:1px solid var(--line-2);min-width:0}
.stats{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.stat{background:var(--bg);border:1px solid var(--line-2);border-radius:11px;padding:8px 13px;min-width:82px}
.stat span{display:block;font-size:10.5px;letter-spacing:.06em;color:var(--ink-3);font-weight:750;text-transform:uppercase}
.stat b{font-size:17px;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat.hl b{color:var(--brand-dark)}
.board-wrap{position:relative;max-width:490px;margin:0 auto}
/* 视觉隐藏但保留语义，供屏幕阅读器与爬虫读取 */
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.noscript-note{background:var(--brand-soft);border:1px solid #F7D9C4;color:#8A4A25;border-radius:12px;padding:13px 15px;font-size:13px;line-height:1.7;margin:0 0 16px}
.noscript-note a{color:inherit;font-weight:800;text-decoration:underline}
.panel .panel-title{font-size:15px;margin:0 0 4px}
.board{display:grid;gap:3px;aspect-ratio:1;width:100%;background:#fff;border-radius:14px;overflow:hidden}
/* 棋盘几何恒定：隐式行强制等分且最小为 0，任何内容都撑不开格子 */
.board,.mini-board,.answer-board,.archive-mini,.answer-mini,.solver-board{grid-auto-rows:minmax(0,1fr)}
.cell{border:0;padding:0;position:relative;display:grid;place-items:center;min-width:0;min-height:0;overflow:hidden;contain:layout paint;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:filter .14s}
.cell:hover{filter:brightness(.955)}
.cell:active{filter:brightness(.9)}
.cell:focus-visible{outline:3px solid var(--brand-dark);outline-offset:-3px;z-index:3}
/* 图标绝对定位：彻底脱离布局流，宽高按格子百分比解析，永不参与尺寸计算 */
.cell .cat,.cell .x{position:absolute;pointer-events:none;z-index:2}
.cell .cat{left:17%;top:17%;width:66%;height:66%;color:#4A3728;animation:pop .26s cubic-bezier(.2,1.5,.4,1)}
.cell .x{left:31%;top:31%;width:38%;height:38%;color:rgba(74,55,40,.45);animation:fadein .18s ease}
.cell.conflict{box-shadow:inset 0 0 0 3px var(--danger)}
.cell.conflict .cat{color:var(--danger);animation:shake .32s}
.cell.solved .cat{animation:bounce .6s ease}
.cell.hintflash{animation:flash .9s ease}
/* 落子反馈：伪元素涟漪只改 opacity/transform，格子几何始终不变 */
.cell::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:1;opacity:0;background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.75),rgba(255,255,255,0) 68%)}
.cell.placed::after{animation:ripple .46s ease-out}
.cell.marked::after{background:radial-gradient(circle at 50% 50%,rgba(74,55,40,.16),transparent 68%);animation:ripple .32s ease-out}
@keyframes pop{from{transform:scale(.35);opacity:0}to{transform:scale(1);opacity:1}}
@keyframes fadein{from{opacity:0;transform:scale(.72)}to{opacity:1;transform:scale(1)}}
@keyframes ripple{from{opacity:.85;transform:scale(.35)}to{opacity:0;transform:scale(1.5)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-3px)}75%{transform:translateX(3px)}}
@keyframes bounce{0%,100%{transform:translateY(0)}40%{transform:translateY(-7px)}70%{transform:translateY(-2px)}}
@keyframes flash{0%,100%{box-shadow:inset 0 0 0 0 transparent}30%{box-shadow:inset 0 0 0 4px var(--brand)}}
.loading{position:absolute;inset:0;background:rgba(255,255,255,.9);border-radius:14px;display:grid;place-items:center;font-size:14px;color:var(--ink-2);font-weight:650;z-index:5}
.loading[hidden]{display:none}
.loading .spin{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 10px}
@keyframes spin{to{transform:rotate(360deg)}}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;max-width:490px;margin:18px auto 0}
.tool{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 13px;font-size:13px;font-weight:700;color:var(--ink-2);transition:.15s}
.tool:hover{background:var(--bg-2);border-color:#DCCDBB;color:var(--ink)}
.tool:disabled{opacity:.45;cursor:not-allowed}
.tool svg{width:15px;height:15px}
.tool.primary{background:var(--brand-soft);border-color:#F7D9C4;color:var(--brand-dark)}
.tool.primary:hover{background:#FCE1CE}
.legend{font-size:12px;color:var(--ink-3);margin:14px 0 0;text-align:center;line-height:1.9}
kbd{font:inherit;font-size:11px;background:var(--bg-2);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 5px;color:var(--ink-2)}

/* side panel */
.side-panel{padding:22px 20px;background:#FFFDFB;display:flex;flex-direction:column;gap:18px}
.side-title{font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--ink-3);text-transform:uppercase;margin:0 0 12px}
.rule-mini{display:flex;gap:11px;align-items:flex-start;margin-bottom:13px}
.rule-num{width:23px;height:23px;flex:none;border-radius:7px;background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:800;display:grid;place-items:center}
.rule-mini p{margin:0;font-size:13px;color:var(--ink-2);line-height:1.6}
.rule-mini b{color:var(--ink)}
.hint-box{background:var(--mint-soft);border:1px solid #D9EBE0;border-radius:12px;padding:13px 14px;font-size:12.8px;color:#3F6B53;line-height:1.65;min-height:74px}
.hint-box strong{display:block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px;color:#4A8061}
.hint-box.warn{background:var(--brand-soft);border-color:#F7D9C4;color:#8A4A25}
.hint-box.warn strong{color:var(--brand-dark)}
.region-list{display:flex;flex-direction:column;gap:7px}
.region-row{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--ink-2)}
.swatch{width:15px;height:15px;border-radius:5px;flex:none;border:1px solid rgba(80,55,35,.08)}
.region-row .rname{flex:1}
.region-row .rstate{font-size:11.5px;font-weight:700;color:var(--ink-3)}
.region-row.done .rstate{color:var(--mint)}
.difficulty{font-size:12px;color:var(--ink-3);border-top:1px solid var(--line-2);padding-top:14px;margin-top:auto}
.difficulty b{color:var(--mint)}

/* cards grid */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(238px,1fr));gap:16px}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:0 2px 8px rgba(80,55,35,.03)}
.info-card .num{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.1em}
.info-card h3{font-size:16px;margin:9px 0 8px;letter-spacing:-.01em}
.info-card p{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.7}
.tip-list{counter-reset:tip;display:grid;gap:12px}
.tip-item{display:flex;gap:15px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:17px 19px}
.tip-item::before{counter-increment:tip;content:counter(tip,decimal-leading-zero);font-size:13px;font-weight:800;color:var(--brand);flex:none;padding-top:2px}
.tip-item h3{font-size:15px;margin:0 0 4px}
.tip-item p{margin:0;font-size:13.5px;color:var(--ink-2)}
.faq{display:grid;gap:10px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:0 18px}
.faq summary{list-style:none;cursor:pointer;font-weight:700;font-size:15px;padding:16px 0;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;color:var(--brand);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0 0 17px;font-size:14px;color:var(--ink-2);max-width:820px}
.notice{background:#fff;border:1px dashed #DCCDBB;border-radius:14px;padding:18px 20px;font-size:13px;color:var(--ink-2);line-height:1.75}
.notice b{color:var(--ink)}

/* footer */
footer{border-top:1px solid var(--line-2);background:#FFFDFB;padding:34px 0 46px;margin-top:20px}
.footer-in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.footer-in p{margin:0;font-size:12.5px;color:var(--ink-3)}
.footer-links{display:flex;gap:18px;font-size:12.5px;color:var(--ink-3)}

/* modal */
.overlay{position:fixed;inset:0;background:rgba(58,46,39,.42);backdrop-filter:blur(4px);z-index:80;display:grid;place-items:center;padding:20px}
.overlay[hidden]{display:none}
.modal{background:#fff;border-radius:24px;padding:32px 30px;width:min(100%,400px);text-align:center;box-shadow:var(--shadow-lg);animation:rise .3s cubic-bezier(.2,1,.3,1)}
@keyframes rise{from{transform:translateY(18px) scale(.97);opacity:0}to{transform:none;opacity:1}}
.modal .win-cat{width:76px;height:76px;color:var(--brand);margin:0 auto 6px}
.modal h2{font-size:25px;margin:0 0 6px;letter-spacing:-.02em}
.modal p{color:var(--ink-2);font-size:14px;margin:0 0 20px}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:22px}
.result-grid div{background:var(--bg);border:1px solid var(--line-2);border-radius:12px;padding:11px}
.result-grid span{display:block;font-size:11px;color:var(--ink-3);font-weight:700}
.result-grid b{font-size:20px;font-variant-numeric:tabular-nums}
.modal-actions{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}

/* toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;font-size:13.5px;font-weight:650;padding:11px 20px;border-radius:99px;opacity:0;pointer-events:none;transition:.25s;z-index:90;box-shadow:var(--shadow-lg)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:38px;padding:44px 0 40px}
  .hero-art{order:2}
  .art-card{transform:rotate(1deg);width:min(100%,340px)}
  .game-body{grid-template-columns:1fr}
  .board-panel{border-right:0;border-bottom:1px solid var(--line-2)}
  .side-panel{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));align-items:start}
  .difficulty{margin-top:0}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .nav{height:58px;gap:12px}
  .brand small{display:none}
  .nav-links{display:none}
  .nav-badge{margin-left:auto}
  h1{font-size:34px}
  .content-section{padding:40px 0}
  .game-section{padding:4px 0 40px}
  .game-top{padding:14px;gap:10px}
  .top-label,.puzzle-id{display:none}
  .board-panel{padding:16px 14px 20px}
  .side-panel{padding:18px 16px}
  .stat{flex:1;min-width:0;padding:7px 10px}
  .stat b{font-size:15px}
  .tool{flex:1 1 auto;min-width:88px;justify-content:center;padding:9px 8px;font-size:12px}
  .legend{font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* ===== 多页面站点：导航、内页、归档、Solver ===== */
.lang-switch{display:inline-flex;align-items:center;gap:2px;background:var(--bg-2);border:1px solid var(--line);border-radius:9px;padding:2px}
.lang-switch a{font-size:12px;font-weight:750;padding:5px 9px;border-radius:7px;color:var(--ink-3)}
.lang-switch a[aria-current="page"]{background:#fff;color:var(--brand-dark);box-shadow:0 1px 3px rgba(80,55,35,.1)}
.lang-switch a:hover{text-decoration:none;color:var(--brand-dark)}
.crumb{font-size:12.5px;color:var(--ink-3);margin:0 0 14px}
.crumb a{color:var(--ink-3)}
.crumb span{margin:0 7px;color:#CDBFAF}
.page-hero{padding:44px 0 30px}
.page-hero h1{font-size:clamp(30px,3.8vw,44px);margin:0 0 14px}
.page-hero .lede{font-size:16px;max-width:760px;margin:0}
.page-hero .eyebrow{margin-bottom:12px}
.subnav{display:flex;gap:9px;flex-wrap:wrap;margin:22px 0 0}
.subnav a{font-size:13px;font-weight:700;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:99px;padding:7px 14px}
.subnav a:hover{color:var(--brand-dark);border-color:#E8C9AF;text-decoration:none}
.doc-section{padding:40px 0;border-top:1px solid var(--line-2)}
.doc-section h2{font-size:clamp(22px,2.5vw,28px);letter-spacing:-.02em;margin:0 0 8px}
.doc-section .sub{color:var(--ink-2);font-size:14.5px;margin:0 0 22px;max-width:760px}

/* 归档列表 */
.archive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(178px,1fr));gap:14px}
.archive-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:13px;display:block;color:inherit;transition:.16s;box-shadow:0 2px 8px rgba(80,55,35,.03)}
.archive-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none;border-color:#E8C9AF}
.archive-card.today{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-soft)}
.archive-mini{display:grid;gap:1px;aspect-ratio:1;border-radius:8px;overflow:hidden;margin-bottom:11px}
.archive-mini i{display:block;border-radius:2px}
.archive-card .a-date{font-size:13.5px;font-weight:800;letter-spacing:-.01em}
.archive-card .a-meta{font-size:11.5px;color:var(--ink-3);margin-top:2px}
.archive-card .a-tag{display:inline-block;font-size:10.5px;font-weight:800;color:var(--brand-dark);background:var(--brand-soft);border-radius:99px;padding:2px 8px;margin-top:8px}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:26px;font-size:14px;font-weight:700}
.pager a{background:#fff;border:1px solid var(--line);border-radius:11px;padding:10px 16px}
.pager a:hover{text-decoration:none;border-color:#E8C9AF}

/* 每日页答案区 */
.answer-layout{display:grid;grid-template-columns:minmax(0,330px) 1fr;gap:30px;align-items:start}
.answer-board{display:grid;gap:3px;aspect-ratio:1;background:#fff;border-radius:14px;overflow:hidden}
.answer-board .cell{border:0}
.step-list{list-style:none;padding:0;margin:0;counter-reset:st}
.step-list li{counter-increment:st;position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 16px 13px 48px;margin-bottom:10px;font-size:14px;color:var(--ink-2)}
.step-list li::before{content:counter(st);position:absolute;left:14px;top:13px;width:23px;height:23px;border-radius:7px;background:var(--brand-soft);color:var(--brand-dark);font-size:12px;font-weight:800;display:grid;place-items:center}
.step-list b{color:var(--ink)}
.answer-code{background:#F7F2EB;border:1px solid var(--line);border-radius:11px;padding:13px 15px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;color:var(--ink-2);white-space:pre-wrap;word-break:break-all;line-height:1.8}

/* Solver */
.solver-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;align-items:start}
.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 2px 8px rgba(80,55,35,.03)}
.panel h3{font-size:15px;margin:0 0 4px}
.panel .panel-sub{font-size:12.5px;color:var(--ink-3);margin:0 0 16px}
.solver-board{display:grid;gap:3px;aspect-ratio:1;max-width:440px;margin:0 auto 18px;background:#fff;border-radius:12px;overflow:hidden}
.solver-cell{border:0;padding:0;border-radius:5px;display:grid;place-items:center;font-size:11px;font-weight:800;color:rgba(58,46,39,.5);position:relative;min-width:0;min-height:0;overflow:hidden;contain:layout paint}
.solver-cell .cat{position:absolute;left:19%;top:19%;width:62%;height:62%;color:#4A3728;pointer-events:none}
.solver-cell.preset::after{content:"";position:absolute;inset:14%;border:2px dashed rgba(58,46,39,.45);border-radius:8px}
.palette{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:14px}
.sw-btn{width:34px;height:34px;border-radius:9px;border:2px solid transparent;display:grid;place-items:center;font-size:11px;font-weight:800;color:rgba(58,46,39,.6);transition:.12s}
.sw-btn[aria-pressed="true"]{border-color:var(--ink);box-shadow:0 0 0 3px var(--brand-soft)}
.io-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
textarea.board-input{width:100%;min-height:118px;resize:vertical;border:1px solid var(--line);border-radius:11px;padding:11px 13px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.7;color:var(--ink);background:#FDFBF8}
textarea.board-input:focus{outline:2px solid var(--brand-soft);border-color:var(--brand)}
.result-box{border-radius:13px;padding:15px 16px;font-size:13.5px;line-height:1.7;background:var(--bg);border:1px solid var(--line-2);margin-bottom:14px}
.result-box.ok{background:var(--mint-soft);border-color:#D9EBE0;color:#3F6B53}
.result-box.bad{background:var(--danger-soft);border-color:#F6D5D1;color:#9B3B31}
.result-box b{display:block;font-size:15px;margin-bottom:4px}
.answer-mini{display:grid;gap:2px;aspect-ratio:1;max-width:230px;margin:0 auto 14px;background:#fff;border-radius:10px;overflow:hidden}
.answer-mini i{display:grid;place-items:center;position:relative;overflow:hidden;border-radius:3px}
.answer-mini svg{position:absolute;left:20%;top:20%;width:60%;height:60%;color:#4A3728}
.field-label{font-size:12px;font-weight:800;color:var(--ink-3);letter-spacing:.06em;text-transform:uppercase;margin:18px 0 8px}
.text-input{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:13px;color:var(--ink);background:#FDFBF8}
.inline-note{font-size:12px;color:var(--ink-3);margin:8px 0 0;line-height:1.7}

@media (max-width:900px){
  .answer-layout,.solver-layout{grid-template-columns:1fr}
  .answer-board{max-width:330px}
}
@media (max-width:640px){
  .page-hero{padding:32px 0 22px}
  .doc-section{padding:32px 0}
  .panel{padding:15px}
  .archive-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
}

/* ===== 内容层：静态答案、答案索引、内链枢纽（保持简洁模板，不做视觉炫技） ===== */
.static-note{font-size:12px;color:var(--ink-3);margin:10px 0 0;line-height:1.7}
.static-answer{margin-top:14px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:0 14px}
.static-answer>summary{cursor:pointer;font-size:13px;font-weight:700;color:var(--ink-2);padding:12px 0}
.static-answer-in{padding:0 0 16px;border-top:1px solid var(--line-2)}
.static-answer-in .field-label{margin:14px 0 6px}
.answer-big{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:clamp(18px,2.6vw,26px);font-weight:800;color:var(--brand-dark);margin:0 0 10px;word-break:break-word}
.today-answer,.answer-hero{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:14px;padding:18px 20px;margin:24px 0 0}
.today-answer .sub,.answer-hero .sub{font-size:13px;color:var(--ink-2);margin:8px 0 0}
.answer-hero-board{max-width:250px;margin-top:14px}
.answer-hero-board .answer-board{border:1px solid var(--line-2)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 8px}
.answer-index,.landing-table{width:100%;border-collapse:collapse;font-size:13.5px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.answer-index th,.landing-table th{text-align:left;font-size:11.5px;font-weight:800;color:var(--ink-3);letter-spacing:.04em;text-transform:uppercase;background:var(--bg-2);padding:10px 12px;white-space:nowrap}
.answer-index td,.landing-table td{padding:9px 12px;border-top:1px solid var(--line-2);color:var(--ink-2);white-space:nowrap}
.answer-index tr.today-row{background:var(--brand-soft)}
.answer-index td.ans,.landing-table td.ans{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700;color:var(--ink)}
.answer-index .a-tag{font-size:10px;font-weight:800;color:var(--brand-dark);background:#fff;border-radius:99px;padding:1px 7px}
.next-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:18px}
.next-card{display:block;background:#fff;border:1px solid var(--line);border-radius:13px;padding:14px 16px;color:inherit}
.next-card:hover{border-color:#E8C9AF;text-decoration:none;background:#FEF9F4}
.next-card b{display:block;font-size:14px;margin-bottom:3px;color:var(--brand-dark)}
.next-card span{font-size:12.5px;color:var(--ink-3)}
.footer-explore{display:grid;grid-template-columns:1fr 1fr;gap:24px;width:100%;margin-bottom:18px}
.footer-explore .footer-h{font-size:11.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin:0 0 8px}
.footer-explore .footer-links{flex-wrap:wrap;gap:8px 16px}
.sample-grid{background:#F7F2EB;border:1px solid var(--line);border-radius:11px;padding:13px 15px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;line-height:1.8;color:var(--ink-2);overflow-x:auto;margin:0 0 14px}
.noscript-note{background:var(--brand-soft);border:1px solid #F0D2BC;border-radius:11px;padding:12px 14px;font-size:13px;color:var(--ink-2);margin:0 0 14px}
@media (max-width:640px){
  .footer-explore{grid-template-columns:1fr;gap:14px}
  .answer-index,.landing-table{font-size:12.5px}
  .answer-hero-board{max-width:200px}
}