:root{
  --paper:#fdf8ea;
  --paper-2:#f7efd9;
  --ink:#2f2718;
  --ink-soft:#6b5c3c;
  --rule:#e0d2ac;
  --gold:#c99a16;
  --gold-deep:#8a6a0c;
  --leaf:#5f7d36;
  --serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  background-image:radial-gradient(circle at 18% 12%,rgba(201,154,22,.07),transparent 42%),
                   radial-gradient(circle at 86% 78%,rgba(95,125,54,.07),transparent 46%);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--gold-deep)}
.wrap{width:100%;max-width:1060px;margin:0 auto;padding:0 20px}

/* ---------- 页眉 ---------- */
.topbar{border-bottom:1px solid var(--rule);background:rgba(253,248,234,.92);position:sticky;top:0;z-index:20;backdrop-filter:blur(6px)}
.topbar .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:1.18rem;letter-spacing:.04em;white-space:nowrap}
.logo .mark{width:30px;height:30px;flex:0 0 30px}
.topnav{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.92rem;margin-left:auto}
.topnav a{color:var(--ink-soft);text-decoration:none;border-bottom:1px solid transparent;padding-bottom:2px}
.topnav a:hover,.topnav a:focus-visible{color:var(--gold-deep);border-bottom-color:var(--gold)}

/* ---------- 首屏 ---------- */
.hero{padding:54px 0 42px;border-bottom:1px solid var(--rule)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center}
.eyebrow{font-size:.82rem;letter-spacing:.3em;color:var(--gold-deep);text-transform:uppercase;margin:0 0 14px}
h1{
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.9rem,6.4vw,3rem);
  line-height:1.3;
  margin:0 0 18px;
  letter-spacing:.01em;
}
h1 .sub{display:block;font-size:clamp(.92rem,3vw,1.05rem);font-family:var(--sans);font-weight:400;color:var(--ink-soft);letter-spacing:.06em;margin-top:12px;line-height:1.7}
.lede{font-size:1.04rem;color:#4a3f2a;margin:0 0 24px}
.hero-figure{border:1px solid var(--rule);border-radius:4px;overflow:hidden;background:var(--paper-2)}
.badges{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0}
.badges li{border:1px solid var(--rule);border-radius:999px;padding:5px 14px;font-size:.84rem;color:var(--ink-soft);background:var(--paper-2)}

/* ---------- 版块 ---------- */
section{padding:56px 0;border-bottom:1px solid var(--rule)}
h2{font-family:var(--serif);font-size:clamp(1.35rem,4.2vw,1.85rem);margin:0 0 10px;font-weight:700}
h3{font-family:var(--serif);font-size:1.08rem;margin:0 0 8px;font-weight:700}
.sec-note{color:var(--ink-soft);margin:0 0 28px;max-width:62ch}
.sec-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px;margin-bottom:6px}
.sec-head .idx{font-family:var(--serif);color:var(--gold);font-size:1.6rem;line-height:1}

/* ---------- 图鉴 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 26px;padding:0;list-style:none}
.chip{
  border:1px solid var(--rule);background:var(--paper-2);color:var(--ink-soft);
  border-radius:999px;padding:7px 17px;font-size:.9rem;cursor:pointer;font-family:inherit;
  transition:background .15s,color .15s,border-color .15s;
}
.chip:hover{border-color:var(--gold)}
.chip[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:#fff}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:22px;list-style:none;padding:0;margin:0}
.card{border:1px solid var(--rule);border-radius:4px;background:#fff;overflow:hidden;display:flex;flex-direction:column}
.card figure{margin:0;background:var(--paper-2);border-bottom:1px solid var(--rule)}
.card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card p{margin:0;font-size:.9rem;color:var(--ink-soft);line-height:1.75}
.card .tagline{font-size:.76rem;letter-spacing:.14em;color:var(--gold-deep)}
.card .dl{margin-top:auto;padding-top:10px;font-size:.86rem;text-decoration:none;border-top:1px dashed var(--rule);color:var(--gold-deep)}
.card .dl:hover{text-decoration:underline}
.empty{color:var(--ink-soft);font-size:.92rem;margin:18px 0 0}

/* ---------- 判读器 ---------- */
.tool{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
.panel{border:1px solid var(--rule);border-radius:4px;background:#fff;padding:22px}
fieldset{border:0;padding:0;margin:0 0 20px;min-width:0}
legend{padding:0;font-size:.82rem;letter-spacing:.16em;color:var(--gold-deep);margin-bottom:10px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opt{position:relative}
.opt input{position:absolute;opacity:0;width:100%;height:100%;left:0;top:0;margin:0;cursor:pointer}
.opt span{display:block;border:1px solid var(--rule);border-radius:3px;padding:7px 14px;font-size:.88rem;color:var(--ink-soft);background:var(--paper-2)}
.opt input:checked+span{background:var(--leaf);border-color:var(--leaf);color:#fff}
.opt input:focus-visible+span{outline:2px solid var(--gold);outline-offset:2px}
.result{border:1px solid var(--rule);border-left:4px solid var(--gold);border-radius:4px;background:var(--paper-2);padding:22px}
.result .stage{font-family:var(--serif);font-size:1.5rem;margin:0 0 4px}
.result .scale{font-size:.84rem;letter-spacing:.14em;color:var(--gold-deep);margin:0 0 14px}
.result dl{margin:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 14px;font-size:.92rem}
.result dt{color:var(--ink-soft);white-space:nowrap}
.result dd{margin:0}
.bar{height:8px;border-radius:4px;background:#e6dcc0;overflow:hidden;margin:16px 0 6px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,#5f8f3d,#edc62f,#a8752a)}
.bar-label{font-size:.78rem;color:var(--ink-soft);margin:0}

/* ---------- 文章排版 ---------- */
.prose{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:30px}
.prose p{margin:0 0 14px}
.prose .fig{border:1px solid var(--rule);border-radius:4px;background:var(--paper-2);margin:0 0 14px;overflow:hidden}
.prose .fig figcaption{font-size:.82rem;color:var(--ink-soft);padding:9px 14px;border-top:1px solid var(--rule);background:#fff}
.tips{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.tips li{border-left:3px solid var(--gold);padding:2px 0 2px 16px;font-size:.95rem}
.tips b{display:block;font-family:var(--serif);font-size:1rem}

table{width:100%;border-collapse:collapse;font-size:.9rem}
.table-scroll{overflow-x:auto;border:1px solid var(--rule);border-radius:4px;background:#fff}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--rule);vertical-align:top}
th{background:var(--paper-2);font-weight:700;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}

.notice{border:1px dashed var(--rule);border-radius:4px;padding:18px 20px;background:var(--paper-2);font-size:.92rem;color:var(--ink-soft)}
.notice b{color:var(--ink)}

footer{padding:36px 0 48px;font-size:.88rem;color:var(--ink-soft)}
footer p{margin:0 0 8px}

/* ---------- 404 ---------- */
.lost{min-height:62vh;display:flex;align-items:center;padding:60px 0}
.lost-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,220px);gap:36px;align-items:center;width:100%}
.lost h1{font-size:clamp(1.6rem,5.4vw,2.4rem)}
.backlink{display:inline-block;margin-top:18px;border:1px solid var(--gold);color:var(--gold-deep);text-decoration:none;border-radius:999px;padding:9px 22px;font-size:.92rem}
.backlink:hover{background:var(--gold);color:#fff}

@media (max-width:860px){
  .hero-grid,.tool,.lost-inner{grid-template-columns:minmax(0,1fr)}
  .hero{padding:38px 0 32px}
  section{padding:44px 0}
  .topnav{margin-left:0;width:100%}
}
@media (max-width:420px){
  body{font-size:15px}
  .wrap{padding:0 16px}
  .gallery{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}