:root{
    --bg:#F5EFD9;--deep:#E6DAB8;--paper:#FCF8E9;--sub:#EFE5CA;--ink:#171208;--text:#2B2416;
    --muted:#5D5138;--soft:#7A6B48;--gold:#735719;--honey:#C89C34;--line:rgba(23,18,8,.12);
    --strong:rgba(115,87,25,.48);--shadow:0 14px 30px rgba(23,18,8,.08)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.72;overflow-x:hidden}
body.locked{overflow:hidden}
a{text-decoration:none;color:inherit}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%;object-fit:contain;object-position:center}
.wrap{width:min(960px,calc(100% - 32px));margin:0 auto}
.site-head{position:fixed;inset:0 0 auto;z-index:80}
.tinybar{height:20px;background:var(--ink);color:var(--honey);font-size:12px}
.tinybar-inner{height:20px;display:flex;align-items:center;justify-content:space-between}
.tiny-action{height:20px;border:0;background:transparent;color:var(--honey);padding:0 6px}
.brandbar{height:54px;background:var(--paper);border-bottom:1px solid var(--strong)}
.brandbar-inner{height:54px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand-home{display:flex;align-items:center;min-height:44px}
.brand-logo{height:24px;width:auto}.brand-text{font-size:16px;color:var(--ink)}
.brand-actions{display:flex;align-items:center;gap:8px}
.app-cta,.menu-cta{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:14px;font-size:14px}
.app-cta{background:linear-gradient(135deg,#171208 0%,#C89C34 100%);color:var(--paper)}
.menu-cta{background:var(--paper);color:var(--ink);border:1px solid var(--strong)}
.primary-nav{height:44px;background:var(--paper);border-bottom:1px solid var(--line)}
.primary-inner{height:44px;display:flex;align-items:center;justify-content:center;gap:44px}
.primary-inner a{position:relative;font-size:13px;color:var(--muted);padding:12px 4px 8px}
.primary-inner a:after{content:"";position:absolute;left:50%;bottom:3px;width:18px;height:2px;transform:translateX(-50%);background:transparent}
.primary-inner a.is-current{font-weight:800;color:var(--ink)}
.primary-inner a.is-current:after{background:var(--honey)}
.site-main{padding-top:118px;padding-bottom:46px}
.hero,.page-head{padding:40px 0 24px}
.hero h1,.page-head h1{font-size:24px;line-height:1.3;color:var(--ink);margin:0 0 12px}
h2{font-size:20px;line-height:1.4;color:var(--ink);margin:0 0 12px}
h3{font-size:16px;line-height:1.45;color:var(--ink);margin:0 0 8px}
p{margin:0 0 14px}
.kicker{font-size:12px;color:var(--gold);font-weight:800;letter-spacing:.12em}
.lead{font-size:18px;color:var(--ink);font-weight:800}
.summary{max-width:780px;color:var(--muted)}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{min-height:42px;padding:0 18px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;border:1px solid transparent}
.primary{background:linear-gradient(135deg,#171208 0%,#C89C34 100%);color:var(--paper)}
.secondary{background:var(--paper);border-color:var(--gold);color:var(--ink)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--honey);outline-offset:2px}
.btn:hover,.btn:focus-visible,.app-cta:hover,.app-cta:focus-visible{transform:translateY(-1px);box-shadow:0 8px 18px rgba(23,18,8,.12)}
.section{padding:30px 0}
.card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
.media{background:var(--paper);border:1px solid var(--line);border-radius:16px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.media img{width:100%;height:100%;object-fit:contain}
.media-wide{height:170px}.media-card{height:180px}.media-tall{height:310px}.media-banner{height:200px}.media-icon{width:64px;height:64px}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px 0 20px}
.quick-grid a{background:var(--paper);border-bottom:2px solid var(--honey);border-radius:12px 12px 4px 4px;padding:10px 12px;font-size:13px}
.highlight-band{background:var(--deep);border-top:1px solid var(--strong);border-bottom:1px solid var(--strong)}
.story-row{display:grid;grid-template-columns:minmax(190px,270px) 1fr;gap:20px;align-items:center}
.two-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature-stack{display:grid;gap:12px}
.feature{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:18px}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.timeline article{background:var(--ink);color:var(--paper);border-radius:16px;padding:18px}
.timeline h3{color:var(--honey)}
.status-list{display:grid;gap:10px}
.status-row{display:grid;grid-template-columns:110px 1fr;gap:14px;background:var(--paper);border-left:4px solid var(--gold);border-radius:14px;padding:14px 16px}
.status-row b{color:var(--gold)}
.app-flow{display:grid;gap:16px}
.app-media{display:grid;grid-template-columns:1fr 72px;gap:12px;align-items:start}
.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.method-grid section{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px}
.prose{max-width:780px;margin:auto}
.prose section{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px;margin-bottom:14px}
.memo-list{display:grid;gap:12px}
.memo{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:18px}
.topic-list{display:grid;gap:14px}
.topic{display:grid;grid-template-columns:110px 1fr;gap:18px;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px}
.topic-no{font-size:30px;color:var(--honey);font-weight:800}
.center-card{max-width:760px;margin:auto}
.qa-list{display:grid;gap:14px}
.qa-list article{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px}
.qa-list h2{font-size:17px}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.site-footer{background:var(--ink);color:var(--bg);border-top:1px solid var(--honey);padding:34px 0 calc(70px + env(safe-area-inset-bottom))}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.footer-logo{height:24px;width:auto}.footer-brand div{display:flex;gap:8px;align-items:baseline}.footer-brand span{font-size:12px;color:var(--honey);letter-spacing:.12em}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:14px;color:var(--honey)}.footer-grid a{display:block;font-size:13px;padding:4px 0}
.footer-note,.copyright{font-size:13px;color:#DED1B1}.footer-note{margin-top:24px;padding-top:18px;border-top:1px solid rgba(200,156,52,.28)}
.mask{position:fixed;inset:0;z-index:90;background:rgba(23,18,8,.46);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.mask.open{opacity:1;visibility:visible;pointer-events:auto}
.menu-panel{position:fixed;z-index:100;right:16px;top:76px;width:300px;max-height:360px;background:var(--paper);border:1px solid var(--strong);border-radius:16px;box-shadow:var(--shadow);transform:translateY(-16px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.menu-panel.open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}
.menu-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--line)}
.menu-brand{display:flex;align-items:center;gap:8px}.menu-brand img{height:24px}
.menu-head button,.search-head button{min-height:44px;border:0;background:transparent;color:var(--gold)}
.menu-scroll{max-height:295px;overflow:auto;padding:10px 14px}.menu-scroll section{margin-bottom:12px}.menu-scroll h2{font-size:13px;color:var(--gold);margin-bottom:4px}.menu-scroll a{display:block;padding:7px 0;border-bottom:1px solid var(--line)}.menu-scroll b{display:block;font-size:13px}.menu-scroll span{display:block;font-size:12px;color:var(--muted)}
.search-panel{position:fixed;z-index:101;top:76px;left:50%;width:min(560px,calc(100% - 32px));transform:translate(-50%,-14px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.search-panel.open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.search-card{background:var(--paper);border:1px solid var(--strong);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.search-head{display:flex;justify-content:space-between;align-items:center}.search-head h2{margin:0}
.search-card input{width:100%;height:44px;border:1px solid var(--strong);border-radius:12px;background:#fffdf5;padding:0 12px}
.search-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.search-links a{padding:8px 12px;border:1px solid var(--gold);border-radius:12px;font-size:13px}
.mobile-bottom{display:none}
@media(max-width:720px){
    .primary-nav{display:none}.site-main{padding-top:74px;padding-bottom:68px}
    .quick-grid,.story-row,.two-grid,.timeline,.method-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
    .app-media{grid-template-columns:1fr}.media-icon{width:64px}
    .menu-panel{right:6%;top:76px;width:88%}
    .search-panel{top:0;left:0;width:100%;height:100%;transform:none;background:var(--ink);padding:80px 16px 16px}.search-panel.open{transform:none}
    .search-card{background:var(--ink);color:var(--honey);box-shadow:none}.search-card h2,.search-head button{color:var(--honey)}.search-card input{background:var(--paper)}.search-links a{color:var(--paper);border-color:var(--honey)}
    .mobile-bottom{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:var(--paper);border-top:1px solid var(--strong)}
    .mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}.mobile-bottom a.is-current{background:var(--honey);color:var(--ink);font-weight:800}
}