:root{
  --bg:#0b1220; --ink:#1b2430; --muted:#6b7688; --line:#e5e9f0;
  --brand:#0a5ad6; --brand2:#1e9e6a; --paper:#ffffff; --soft:#f5f7fb;
  --radius:14px; --wrap:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.wrap.narrow{max-width:760px}
h1,h2,h3{line-height:1.3}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{font-weight:800;color:var(--ink);font-size:18px;white-space:nowrap}
.menu{display:flex;gap:18px;flex-wrap:wrap}
.menu a{color:var(--ink);font-size:14px}

/* hero */
.hero{background:linear-gradient(135deg,#0a2f6e,#0a5ad6 60%,#1e9e6a);color:#fff;padding:72px 0}
.hero h1{margin:0 0 12px;font-size:clamp(26px,5vw,44px)}
.slogan{font-size:clamp(15px,2.6vw,20px);opacity:.95;max-width:760px}
.hero-cta{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}

/* sections */
.sec{padding:56px 0}
.sec.alt{background:var(--soft)}
.sec h2{font-size:26px;margin:0 0 22px;position:relative;padding-left:14px}
.sec h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:5px;border-radius:4px;background:linear-gradient(var(--brand),var(--brand2))}
.intro p{margin:0 0 14px;color:#33404f}
.lead{font-size:18px;color:#33404f}

/* buttons */
.btn{display:inline-block;background:var(--brand);color:#fff;border:none;padding:11px 20px;border-radius:10px;font-size:15px;cursor:pointer;font-weight:600}
.btn:hover{filter:brightness(1.06);text-decoration:none}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.8)}
.btn.small{padding:7px 14px;font-size:13px}
.btn.danger{background:#d94848}
.btn.ghost:hover{background:rgba(255,255,255,.12)}

/* grids */
.grid{display:grid;gap:20px}
.cards{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.qrs{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:0 1px 3px rgba(20,40,80,.05)}
.card .thumb{aspect-ratio:4/3;background:var(--soft);overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card-body{padding:16px}
.card-body h3{margin:0 0 8px;font-size:18px}
.more{font-size:14px;font-weight:600}

/* qr */
.qr{margin:0;text-align:center;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.qr img{width:100%;max-width:180px;margin:0 auto;aspect-ratio:1/1;object-fit:contain}
.qr figcaption{margin-top:10px;font-size:14px;color:var(--muted)}

.contact-list{list-style:none;padding:0;margin:0 0 22px;color:#33404f}
.contact-list li{padding:4px 0}

/* form */
.form,.login-card form{display:flex;flex-direction:column;gap:14px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
input,textarea,select{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;width:100%}
input:focus,textarea:focus,select:focus{outline:2px solid rgba(10,90,214,.25);border-color:var(--brand)}
textarea{resize:vertical}
.status{font-size:14px}
.status.ok{color:var(--brand2)} .status.err{color:#d94848}
.muted{color:var(--muted)}

/* footer */
.footer{background:var(--ink);color:#c7d0dc;padding:26px 0}
.footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer a{color:#9fc0ff}

/* login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0a2f6e,#0a5ad6);padding:20px}
.login-card{background:#fff;padding:32px;border-radius:16px;width:100%;max-width:360px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.login-card h1{margin:0 0 20px;font-size:22px}
.login-card label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:14px}

/* admin */
.admin{padding:28px 20px 60px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:26px}
.panel>h2{margin-top:0}
.panel form{display:flex;flex-direction:column;gap:12px;margin-bottom:8px}
.panel label{display:flex;flex-direction:column;gap:5px;font-size:13px;font-weight:600}
.item{border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--soft);margin-bottom:14px}
.item.new{border-style:dashed;background:#fff}
.item-head{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.item-head label{flex:0 0 auto}
.grow{flex:1 1 200px!important}
.w80{width:90px} .w120{width:130px}
.mini{width:54px;height:54px;object-fit:contain;border:1px solid var(--line);border-radius:8px;background:#fff}
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.btns{display:flex;gap:10px}
.msg{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px;background:var(--soft)}
.msg-meta{font-size:14px;margin-bottom:6px}
.msg-body{white-space:pre-wrap;margin-bottom:10px;color:#33404f}
.flash{padding:10px 14px;border-radius:9px;margin-bottom:14px;font-size:14px}
.flash.ok{background:#e6f6ee;color:#137a4c}
.flash.error{background:#fdeaea;color:#b62d2d}

@media(max-width:640px){
  .menu{gap:12px;font-size:13px}
  .row3{grid-template-columns:1fr}
  .hero{padding:52px 0}
}