:root{--ink:#20242b;--muted:#777f8b;--line:#e8ebef;--soft:#f6f7f9;--accent:#315b78}
*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.site-header{height:72px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100% - 1080px)/2))}
.brand{font-size:19px;font-weight:800;letter-spacing:2px}.brand span{color:var(--accent)}nav{display:flex;align-items:center;gap:25px;color:var(--muted);font-size:14px}nav a:hover{color:var(--ink)}
.container{width:min(860px,calc(100% - 40px));margin:0 auto}.hero{padding:88px 0 72px;border-bottom:1px solid var(--line)}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--accent);font-weight:700;margin:0 0 12px}
.hero h1{font-size:clamp(32px,6vw,48px);line-height:1.25;letter-spacing:-1px;margin:0 0 16px}.hero-desc{color:var(--muted);margin:0;font-size:16px}
.section-heading{display:flex;justify-content:space-between;align-items:end;padding:52px 0 20px}.section-heading h2,.about h2{font-size:25px;margin:0;line-height:1.3}.muted,.post-meta{font-size:13px;color:var(--muted)}
.post-list{display:grid;gap:14px}.post-card{display:block;padding:25px 27px;border:1px solid var(--line);border-radius:10px;transition:.2s}.post-card:hover{border-color:#aab8c4;transform:translateY(-2px)}
.post-card h3{font-size:21px;margin:7px 0 8px}.post-card p{color:var(--muted);font-size:14px;margin:0 0 14px}.read-more{font-size:13px;color:var(--accent);font-weight:650}
.empty,.loading,.notice{padding:26px;border-radius:10px;background:var(--soft);color:var(--muted);font-size:14px}.notice{color:#8a4b22;background:#fff8ef}
.about{margin:72px 0;padding:32px;border-radius:12px;background:var(--soft)}.about p:last-child{color:var(--muted);margin-bottom:0}
.site-footer{border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:12px;padding:28px 16px;margin-top:70px}
.article-container{padding-top:45px;min-height:55vh}.back-link{font-size:14px;color:var(--muted)}.article{max-width:760px;margin:50px auto 0}.article h1{font-size:clamp(30px,5vw,42px);line-height:1.3;margin:12px 0 36px}.article-content{font-size:17px;line-height:2;color:#343a42;overflow-wrap:anywhere}
.admin-container{padding-top:48px;min-height:65vh}.admin-heading{margin-bottom:28px}.admin-heading h1{font-size:34px;margin:0}.panel{border:1px solid var(--line);border-radius:12px;padding:28px;margin-bottom:24px}.panel h2{margin:0 0 10px;font-size:21px}
.primary,.secondary,.danger,.link-button{border:0;border-radius:7px;padding:10px 17px;cursor:pointer;font-weight:600}.primary{background:#315b78;color:white}.secondary{background:#edf1f4;color:#35414c}.danger{background:#fff0f0;color:#a22}.link-button{background:transparent;color:var(--muted);padding:5px}
label{display:block;font-size:14px;font-weight:650;margin:18px 0 6px}input,textarea,select{width:100%;border:1px solid #d9dfe5;border-radius:7px;padding:11px 12px;background:#fff;color:var(--ink)}textarea{resize:vertical;line-height:1.7}
.form-actions,.admin-toolbar,.admin-list-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.form-actions{justify-content:flex-start;margin-top:18px}.admin-toolbar h2,.admin-list-heading h2{margin:0}.admin-list-heading{border-top:1px solid var(--line);padding-top:24px;margin-top:30px}.admin-post-list{display:grid;margin-top:15px}.admin-row{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}.row-actions{display:flex;gap:8px}.small{font-size:12px}.error{color:#b42318}.admin-toolbar{margin-bottom:20px}
[hidden]{display:none!important}
@media(max-width:600px){.site-header{height:62px;padding:0 18px}nav{gap:12px;font-size:12px}.hero{padding:65px 0 52px}.post-card{padding:21px}.about{padding:24px}.panel{padding:20px}.admin-row{align-items:flex-start;flex-direction:column}.row-actions{width:100%}}
/* Admin operation feedback */
.operation-message{padding:12px 15px;border-radius:8px;margin:0 0 18px;font-size:14px;font-weight:600}
.operation-message[hidden]{display:none}
.success-state{color:#17633a;background:#edf8f1;border:1px solid #ccebd7}
.error-state{color:#a22;background:#fff1f1;border:1px solid #f3d0d0}
.success-message{color:#17633a}
button:disabled{opacity:.6;cursor:wait}