:root{--bg:#f5f8ff;--card:#fff;--ink:#10203f;--muted:#64748b;--line:#15356f;--blue:#2563eb;--red:#ef4444;--orange:#f97316;--amber:#f59e0b;--green:#16a34a;--teal:#0891b2;--purple:#7c3aed;--shadow:0 20px 50px rgba(15,23,42,.08);--soft:0 10px 28px rgba(15,23,42,.06);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif}
    *{box-sizing:border-box;margin:0;padding:0}
    body{min-height:100vh;color:var(--ink);background:radial-gradient(circle at 8% 8%,rgba(37,99,235,.14),transparent 30%),linear-gradient(135deg,#fbfdff,var(--bg));padding:22px}
    a{text-decoration:none;color:inherit}button,input{font-family:inherit}
    .page{max-width:1580px;margin:0 auto;display:grid;gap:18px}
    .topbar{position:sticky;top:0;z-index:30;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:4px 0;background:rgba(245,248,255,.82);backdrop-filter:blur(14px)}
    .back,.tool{border:1px solid rgba(37,99,235,.14);background:rgba(255,255,255,.86);box-shadow:var(--soft);border-radius:999px;padding:11px 15px;color:#1d4ed8;font-weight:950}
    .toolbar{display:flex;gap:10px;flex-wrap:wrap}.tool{color:var(--ink);cursor:pointer}.tool.primary{background:linear-gradient(135deg,#60a5fa,#2563eb);color:#fff}.tool.warn{color:#b45309}
    .hero,.panel,.module,.word-index{border:1px solid rgba(255,255,255,.9);background:rgba(255,255,255,.8);box-shadow:var(--shadow);border-radius:30px;padding:24px}
    .hero{display:grid;gap:12px}.eyebrow{display:inline-flex;width:max-content;padding:7px 12px;border-radius:999px;background:rgba(37,99,235,.08);color:#1d4ed8;font-size:.82rem;font-weight:950}
    .hero h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.05;letter-spacing:-.06em}
    .hero p,.summary{color:var(--muted);line-height:1.8;font-weight:760}
    .notice{border-left:5px solid #2563eb;border-radius:18px;padding:12px 14px;background:rgba(37,99,235,.07);color:#334155;font-weight:850;line-height:1.75}
    .notice b{color:#0f2c63}.notice.danger{border-left-color:#ef4444;background:rgba(239,68,68,.08)}
    .stat,.tabs{display:flex;gap:10px;flex-wrap:wrap}.pill,.tab{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:7px 11px;background:#fff;box-shadow:var(--soft);color:#475569;font-size:.82rem;font-weight:900}.pill strong{color:var(--blue)}
    .tab{border:0;cursor:pointer}.tab.active{background:linear-gradient(135deg,#60a5fa,#2563eb);color:#fff}
    .filters{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center}.search{width:100%;border:1px solid rgba(148,163,184,.25);border-radius:999px;padding:13px 16px;background:#fff;box-shadow:var(--soft);outline:none;color:var(--ink);font-weight:800}
    .module-list{display:grid;gap:12px}.module{padding:0;overflow:hidden}.module[open]{background:rgba(255,255,255,.92)}
    .module-title{list-style:none;display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:14px;align-items:center;padding:16px;cursor:pointer}.module-title::-webkit-details-marker{display:none}
    .num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;color:#fff;background:var(--accent);font-size:1.25rem;font-weight:1000}
    .module-title h2{font-size:1.16rem;color:var(--accent);font-weight:1000;letter-spacing:-.03em}.module-title small{display:block;color:#64748b;line-height:1.55;font-weight:900}.module-count{display:grid;gap:4px;text-align:right;color:#475569;font-size:.78rem;font-weight:1000}
    .module-body{display:grid;gap:14px;padding:0 16px 16px}.guide-sections,.map-grid{display:grid;gap:9px}.guide-sections{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
    .guide-card,.map-card,.word-index{background:#fff;border-radius:18px;border:1px solid rgba(148,163,184,.22);box-shadow:var(--soft)}
    .guide-card{padding:12px}.guide-card h3,.map-card h3{font-size:.9rem;color:#1f2937;line-height:1.45}.relation{font-size:.72rem;color:#64748b;font-weight:900;margin-top:4px}
    .map-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
    .map-card{padding:12px;display:grid;gap:9px;border-left:4px solid var(--accent)}.map-meta{display:flex;gap:7px;flex-wrap:wrap}.badge{border-radius:999px;padding:4px 8px;background:rgba(37,99,235,.07);color:#334155;font-size:.68rem;font-weight:950}
    .words{display:flex;gap:7px;flex-wrap:wrap}.word{border-radius:14px;padding:6px 9px;background:color-mix(in srgb,var(--accent),#fff 90%);color:#172554;font-size:.84rem;font-weight:850;border:1px solid color-mix(in srgb,var(--accent),#fff 76%);display:grid;gap:2px;min-width:72px}.word-en{font-weight:1000}.word-cn{font-size:.72rem;line-height:1.25;color:#64748b;font-weight:800}
    .word-index{display:grid;gap:12px;padding:18px}.index-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.word-bank{display:flex;gap:7px;flex-wrap:wrap;max-height:68vh;overflow:auto;padding:2px}
    .letter-group{display:grid;gap:8px}.letter-title{font-size:1rem;font-weight:1000;color:#0f2c63}
    .loading{padding:18px;border-radius:22px;background:#fff;box-shadow:var(--soft);font-weight:900;color:#64748b}.hidden{display:none!important}
    @media(max-width:760px){
      body{padding:12px;background:#f7fbff}.page{gap:12px}.topbar{position:sticky}.back,.tool{padding:9px 12px;font-size:.86rem}.hero,.panel{border-radius:24px;padding:18px}.hero h1{font-size:1.95rem;letter-spacing:-.04em}.notice{font-size:.9rem}.pill,.tab{font-size:.78rem;padding:7px 10px}.filters{grid-template-columns:1fr}.module-title{grid-template-columns:42px 1fr 22px;padding:13px}.module-title:after{content:"展开";grid-column:3;color:#94a3b8;font-size:.72rem;font-weight:1000;writing-mode:vertical-rl;letter-spacing:.05em}.module[open] .module-title:after{content:"收起"}.num{width:34px;height:34px;font-size:1rem}.module-title h2{font-size:1.04rem;line-height:1.3}.module-count{grid-column:2;text-align:left;display:flex;gap:8px;flex-wrap:wrap}.module-body{padding:0 12px 12px}.guide-sections,.map-grid{grid-template-columns:1fr}.word{font-size:.82rem;min-width:82px}.word-bank{max-height:none}
    }