:root{--paper:#f5ead7;--paper2:#ead9bb;--card:#fff8ec;--ink:#1b160f;--text:#332819;--muted:#6d5a3a;--gold:#8a6427;--copper:#b98537;--line:rgba(27,22,15,.14);--strong:rgba(138,100,39,.5);--shadow:0 14px 34px rgba(27,22,15,.10);--radius:12px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-80px;z-index:100;background:var(--ink);color:var(--card);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.site-head{position:fixed;left:0;right:0;top:0;z-index:40;box-shadow:0 4px 18px rgba(27,22,15,.07)}.utility-row{height:22px;background:var(--ink);color:#efd7a7;display:flex;align-items:center;justify-content:space-between;padding:0 max(16px,calc((100vw - 960px)/2));font-size:12px}.utility-search{border:0;background:none;color:#efd7a7;padding:0;cursor:pointer}.identity-row{height:58px;background:rgba(255,248,236,.98);display:grid;grid-template-columns:160px 1fr auto;align-items:center;gap:16px;padding:0 max(16px,calc((100vw - 960px)/2));border-bottom:1px solid var(--line)}.logo-link{display:inline-flex;align-items:center;height:44px}.brand-logo,.foot-logo,.menu-logo{height:24px;max-width:120px;object-fit:contain}.brand-text{font-weight:900;font-size:20px;color:var(--ink)}.identity-note{margin:0;color:var(--muted);font-size:13px}.head-actions{display:flex;gap:8px;align-items:center}.head-actions a,.head-actions button{min-height:40px;border:1px solid var(--gold);border-radius:999px;padding:8px 13px;background:var(--card);color:var(--ink);cursor:pointer}.head-actions a:hover,.head-actions button:hover{background:var(--ink);color:var(--card)}.primary-nav{height:44px;background:#efe0c6;display:flex;align-items:center;justify-content:center;gap:8px;border-bottom:1px solid var(--line)}.primary-nav a{height:32px;display:flex;align-items:center;padding:0 14px;border-radius:999px;color:var(--muted);font-size:13px}.primary-nav a:hover,.primary-nav a.is-current{background:var(--ink);color:#f6ddb0}.site-main{max-width:960px;margin:0 auto;padding:148px 0 72px}.page-wrap{padding:0 16px}.mast{padding:34px 0 22px;border-bottom:1px solid var(--line)}.kicker{margin:0 0 8px;color:var(--gold);font-size:12px;font-weight:800;letter-spacing:.12em}.mast h1,.home-hero h1{margin:0;color:var(--ink);font-size:clamp(28px,5vw,46px);line-height:1.2;letter-spacing:-.02em}.lead{max-width:760px;margin:14px 0 0;color:var(--muted);font-size:16px}.home-hero{padding:44px 16px 28px}.home-hero .eyebrow{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.pill{border:1px solid var(--strong);border-radius:999px;padding:5px 10px;color:var(--gold);font-size:12px}.home-hero p{max-width:760px;margin:18px 0 0}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;border-radius:9px;border:1px solid var(--gold);font-weight:700}.btn.primary{background:linear-gradient(135deg,#1b160f 0%,#b98537 100%);color:#fff8ec}.btn.secondary{background:var(--card);color:var(--ink)}.route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:0 16px 30px}.route-grid a{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px;min-height:104px;box-shadow:0 8px 18px rgba(27,22,15,.05)}.route-grid strong{display:block;color:var(--ink);font-size:16px;margin-bottom:5px}.route-grid span{color:var(--muted);font-size:13px}.section{padding:30px 16px;border-top:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:16px}.section-head h2{margin:0;color:var(--ink);font-size:22px}.section-head p{margin:0;color:var(--muted);max-width:520px}.split-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:stretch}.feature-copy,.paper-card,.article-card,.status-row,.note-card,.topic-row,.index-card,.policy-block,.help-card,.faq-item,.contact-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(27,22,15,.05)}.feature-copy{padding:22px}.feature-copy h3{margin:0 0 8px;font-size:20px;color:var(--ink)}.feature-copy p{margin:0 0 12px}.media-box{margin:0;min-height:168px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;overflow:hidden}.media-box img{width:100%;height:100%;max-height:320px;object-fit:contain;object-position:center}.media-empty{display:block;width:100%;height:100%;min-height:168px;background:linear-gradient(135deg,#ead9bb,#fff8ec)}.media-tall{min-height:260px}.media-banner{min-height:200px;max-height:200px}.media-banner img{max-height:200px}.three-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.article-card{padding:18px}.article-card h3{margin:0 0 8px;color:var(--ink)}.article-card p{margin:0}.stack{display:grid;gap:12px}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.paper-card{padding:20px}.paper-card h3{margin:0 0 8px;color:var(--ink)}.paper-card p:last-child{margin-bottom:0}.timeline{display:grid;gap:10px}.status-row{display:grid;grid-template-columns:130px 1fr auto;gap:14px;align-items:center;padding:14px 16px}.status-row strong{color:var(--ink)}.status-row em{font-style:normal;font-size:12px;border:1px solid var(--strong);border-radius:999px;padding:4px 8px;color:var(--gold)}.note-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.note-card{padding:18px}.note-card h3{margin:0 0 7px}.method-list{counter-reset:step;display:grid;gap:12px}.method-list article{counter-increment:step;background:var(--card);border-left:4px solid var(--copper);padding:18px 20px;border-radius:0 12px 12px 0}.method-list h2{margin:0 0 6px;font-size:18px;color:var(--ink)}.method-list h2:before{content:counter(step,"0") " · ";color:var(--gold)}.topic-list{display:grid;gap:10px}.topic-row{padding:18px;display:grid;grid-template-columns:180px 1fr;gap:18px}.topic-row h2{margin:0;color:var(--ink);font-size:18px}.topic-row p{margin:0}.index-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.index-card{padding:18px}.index-card h2{font-size:18px;margin:0 0 6px}.index-card p{margin:0 0 10px}.index-card a{color:var(--gold);font-weight:700}.app-layout{display:grid;grid-template-columns:340px 1fr;gap:20px;align-items:start}.app-copy{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.app-icon{width:48px;height:48px;object-fit:contain;margin-bottom:10px}.policy-stack{display:grid;gap:12px}.policy-block{padding:20px}.policy-block h2{margin:0 0 8px;font-size:19px}.policy-block p{margin:0 0 10px}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.help-card{padding:18px}.help-card h2{font-size:18px;margin:0 0 8px}.faq-list{display:grid;gap:10px}.faq-item{padding:18px}.faq-item h2{font-size:17px;margin:0 0 7px}.faq-item p{margin:0}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.contact-card{padding:18px}.contact-card h2{font-size:18px;margin:0 0 7px}.contact-card p{margin:0}.about-signature{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.quote-card{background:var(--ink);color:#f5ead7;border-radius:var(--radius);padding:24px}.quote-card h2{margin:0 0 10px;color:#f0cb84}.quote-card p{margin:0}.site-foot{background:var(--ink);color:#f5ead7;border-top:1px solid #b98537;padding:34px max(16px,calc((100vw - 960px)/2)) 82px}.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.foot-brand div{display:flex;flex-direction:column}.foot-brand span{font-size:12px;color:#d8bf92}.foot-links{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.foot-links h2{font-size:14px;color:#dcb870;margin:0 0 8px}.foot-links a{display:block;font-size:13px;margin:6px 0;color:#f5ead7}.foot-note{border-top:1px solid rgba(255,255,255,.14);padding-top:18px;margin-top:22px;font-size:13px;color:#dac9aa}.foot-copy{font-size:13px;color:#aa9878}.overlay{position:fixed;inset:0;background:rgba(16,12,7,.46);z-index:60;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.show{opacity:1;visibility:visible;pointer-events:auto}.menu-sheet{position:fixed;left:18px;bottom:64px;z-index:70;width:min(420px,calc(100vw - 36px));max-height:min(78vh,620px);overflow:auto;background:var(--card);border:1px solid var(--strong);border-radius:16px;box-shadow:0 24px 70px rgba(0,0,0,.26);transform:translateY(20px);opacity:0;visibility:hidden;pointer-events:none;transition:.22s}.menu-open .menu-sheet{transform:none;opacity:1;visibility:visible;pointer-events:auto}.menu-top{position:sticky;top:0;background:var(--card);display:flex;align-items:center;justify-content:space-between;padding:14px;border-bottom:1px solid var(--line);z-index:2}.menu-brand{display:flex;align-items:center;gap:10px}.menu-top button,.search-title button{border:1px solid var(--line);background:var(--paper);min-height:40px;border-radius:8px;padding:6px 12px}.menu-groups{padding:10px 14px 16px}.menu-groups section+section{border-top:1px solid var(--line);margin-top:12px;padding-top:10px}.menu-groups h2{margin:0 0 6px;color:var(--gold);font-size:13px}.menu-groups a{display:grid;grid-template-columns:84px 1fr;gap:10px;padding:8px 0}.menu-groups a strong{color:var(--ink)}.menu-groups a span{color:var(--muted);font-size:13px}.search-layer{position:fixed;left:50%;top:88px;z-index:72;width:min(720px,calc(100vw - 32px));transform:translate(-50%,-10px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-open .search-layer{transform:translate(-50%,0);opacity:1;visibility:visible;pointer-events:auto}.search-box{background:var(--card);border:1px solid var(--strong);border-radius:14px;box-shadow:var(--shadow);padding:18px}.search-title{display:flex;justify-content:space-between;align-items:center}.search-box p{color:var(--muted)}.search-box input{width:100%;min-height:46px;border:1px solid var(--line);background:#fffdf8;border-radius:9px;padding:0 12px;color:var(--ink)}.search-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.search-links a{border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:7px 11px}.mobile-dock{display:none}.locked{overflow:hidden}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(185,133,55,.4);outline-offset:2px}
@media(max-width:720px){.identity-row{grid-template-columns:auto 1fr;gap:8px;height:56px}.identity-note{display:none}.head-actions{justify-self:end}.head-actions a,.head-actions button{min-height:44px;padding:7px 11px}.primary-nav{display:none}.site-main{padding-top:92px;padding-bottom:76px}.home-hero{padding-top:30px}.route-grid{grid-template-columns:1fr 1fr}.split-feature,.app-layout,.about-signature{grid-template-columns:1fr}.three-flow{grid-template-columns:1fr}.pair,.note-list,.index-grid,.help-grid,.contact-grid{grid-template-columns:1fr}.status-row{grid-template-columns:1fr;gap:6px}.topic-row{grid-template-columns:1fr;gap:6px}.section-head{align-items:start;flex-direction:column;gap:5px}.foot-links{grid-template-columns:1fr 1fr}.site-foot{padding-bottom:86px}.mobile-dock{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:50;min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:#fff8ec;border-top:1px solid var(--line)}.mobile-dock a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px}.mobile-dock a.is-current{background:#b98537;color:#1b160f;font-weight:800}.menu-sheet{left:6%;width:88%;bottom:62px;max-height:72vh}.search-layer{inset:0;width:auto;transform:none;background:var(--ink);padding:94px 16px 70px;overflow:auto}.search-open .search-layer{transform:none}.search-box{background:transparent;border:0;box-shadow:none;padding:0;color:#f5ead7}.search-title strong{color:#e6bd72}.search-title button{color:#f5ead7;background:transparent;border-color:#8a6427}.search-box p{color:#d8bf92}.search-box input{background:#fff8ec}.search-links a{background:transparent;border-color:#8a6427;color:#f5ead7}.foot-brand{margin-top:6px}}
@media(max-width:420px){.utility-row{padding-left:12px;padding-right:12px}.identity-row{padding-left:12px;padding-right:12px}.head-actions a{display:none}.route-grid{grid-template-columns:1fr}.foot-links{grid-template-columns:1fr 1fr;gap:14px}.home-hero h1,.mast h1{font-size:30px}.page-wrap,.section,.home-hero,.route-grid{padding-left:16px;padding-right:16px}}