:root{--ink:#172033;--muted:#778196;--line:#e8ebf1;--accent:#4263eb;--paper:#f7f8fc;--card:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}img{max-width:100%;display:block}.container{width:min(1160px,calc(100% - 40px));margin:auto}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}.brand{font-size:24px;font-weight:800;letter-spacing:-.7px;white-space:nowrap}.nav{display:flex;align-items:center;gap:20px;flex:1;flex-wrap:wrap}.nav a{font-size:14px;color:#4c566b}.search{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fafbfe}.search input{width:130px;border:0;outline:0;background:transparent;padding:10px 14px}.search button{border:0;background:var(--accent);color:#fff;padding:0 16px;cursor:pointer}
.hero{margin:30px 0 46px;min-height:280px;padding:48px;display:flex;align-items:center;border-radius:24px;background:radial-gradient(circle at 85% 15%,#dbe4ff 0,transparent 32%),linear-gradient(120deg,#edf1ff,#fff 65%);border:1px solid #e4e9ff}.hero h1{font-size:clamp(32px,5vw,52px);line-height:1.2;letter-spacing:-1.5px;margin:12px 0}.hero p{color:var(--muted);margin:0 0 24px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--accent);font-weight:800}.primary-btn{display:inline-block;background:var(--accent);color:#fff;border-radius:10px;padding:11px 18px;font-weight:700}.primary-btn:hover{color:#fff;opacity:.9}
.section{margin:0 0 60px}.section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:20px}.section-heading h2,.page-title h1{margin:4px 0;font-size:30px;letter-spacing:-.7px}.more,.read-more{font-size:13px;color:var(--accent);font-weight:700}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.article-card,.side-box{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}.thumb{display:block;aspect-ratio:16/9;background:#edf0f7;overflow:hidden}.thumb img,.list-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}.article-card:hover .thumb img{transform:scale(1.04)}.thumb-placeholder{height:100%;display:grid;place-items:center;color:#8b98bb;font-size:12px;letter-spacing:3px;background:linear-gradient(135deg,#e9edfb,#f8f9fd)}.card-body{padding:18px}.meta{font-size:12px;color:var(--muted)}.meta span{padding:0 5px}.card-body h3{font-size:18px;line-height:1.45;margin:9px 0}.card-body p,.list-content p{color:#697489;font-size:14px;margin:0 0 14px}
.page-layout,.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:30px;padding-top:36px;padding-bottom:60px}.page-title{padding:10px 0 24px}.page-title p{color:var(--muted);margin:4px 0}.article-list{display:grid;gap:16px}.list-card{display:flex;gap:20px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px}.list-thumb{width:190px;min-width:190px;aspect-ratio:16/10;overflow:hidden;border-radius:10px;background:#edf0f7}.list-content h2{font-size:20px;line-height:1.4;margin:6px 0 8px}.sidebar{padding-top:10px}.side-box{padding:20px;margin-bottom:18px}.side-box h3{font-size:17px;margin:0 0 12px}.side-link{display:block;padding:10px 0;border-top:1px solid var(--line);font-size:14px;line-height:1.5}
.pagination{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;margin:28px 0}.pagination a,.pagination span{padding:8px 12px;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:13px}.pagination span{color:var(--muted)}
.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:20px}.article-detail{min-width:0;background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(22px,4vw,48px)}.article-header h1{font-size:clamp(28px,4vw,40px);line-height:1.3;letter-spacing:-.8px;margin:12px 0}.article-meta{font-size:13px;color:var(--muted);margin:14px 0 24px}.article-meta span{margin:0 8px}.detail-cover{width:100%;max-height:440px;object-fit:cover;border-radius:12px;margin:20px 0 28px}.article-content{font-size:17px;line-height:1.95;overflow-wrap:anywhere}.article-content p{margin:0 0 1.25em}.article-content img{height:auto!important;max-width:100%!important;margin:20px auto;border-radius:8px}.article-content h2,.article-content h3{line-height:1.4;margin:1.5em 0 .7em}.article-content blockquote{margin:1.5em 0;padding:12px 18px;border-left:3px solid var(--accent);background:#f5f7ff;color:#59657c}.article-end{text-align:center;color:#a0a8b8;letter-spacing:3px;margin:36px 0}.prev-next{border-top:1px solid var(--line);padding-top:18px;font-size:14px}.prev-next p{margin:8px 0}.prev-next a{color:var(--accent)}
.site-footer{background:#fff;border-top:1px solid var(--line);padding:28px 0;text-align:center;font-size:13px;color:var(--muted)}.site-footer p{margin:4px}.muted{color:var(--muted)}
@media(max-width:900px){.header-inner{flex-wrap:wrap;padding:14px 0;gap:12px}.nav{order:3;width:100%;flex-basis:100%;gap:16px}.search{margin-left:auto}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-layout,.detail-layout{grid-template-columns:minmax(0,1fr)}.sidebar{padding-top:0}}
@media(max-width:600px){.container{width:calc(100% - 28px)}.brand{font-size:21px}.search input{width:95px}.hero{padding:28px 22px;min-height:240px;margin:20px 0 34px}.article-grid{grid-template-columns:1fr;gap:14px}.card-body{padding:16px}.section-heading h2,.page-title h1{font-size:26px}.page-layout,.detail-layout{padding-top:22px;gap:20px}.list-card{gap:12px;padding:12px}.list-thumb{width:112px;min-width:112px;aspect-ratio:4/3}.list-content h2{font-size:16px;margin:4px 0}.list-content p{font-size:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:6px}.article-detail{padding:20px 16px}.article-content{font-size:16px}.nav a{font-size:13px}}


/* Search page */
.search-page{padding-top:34px;padding-bottom:60px}
.search-hero{text-align:center;padding:46px 20px 38px;background:linear-gradient(135deg,#eef2ff,#fff 72%);border:1px solid #e3e8ff;border-radius:22px;margin-bottom:34px}
.search-hero h1{font-size:clamp(30px,4vw,42px);letter-spacing:-1px;margin:8px 0}
.search-hero p{color:var(--muted);margin:0 0 22px}
.search-form-large{display:flex;max-width:650px;margin:0 auto;border:1px solid #dfe4f1;border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 8px 24px rgba(37,54,100,.06)}
.search-form-large input{flex:1;min-width:0;padding:16px 18px;border:0;outline:0;background:transparent;color:var(--ink);font-size:15px}
.search-form-large button{border:0;padding:0 28px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer}
.search-hints{font-size:12px;color:var(--muted);margin-top:12px}
.result-tip{font-size:12px;color:var(--muted);padding-bottom:8px}
.list-thumb-empty{display:grid;place-items:center;background:linear-gradient(135deg,#e8edff,#f6f7fc);color:#8b98bb;letter-spacing:2px;font-size:12px}


/* Night mode: toggled by body.dark-mode */
body{transition:background-color .2s,color .2s}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:8px 12px;font-size:13px;cursor:pointer;white-space:nowrap}
body.dark-mode{--ink:#e8ecf5;--muted:#9aa5bb;--line:#30394b;--accent:#8ba2ff;--paper:#111622;--card:#1a2231;background:var(--paper);color:var(--ink)}
body.dark-mode .site-header,body.dark-mode .site-footer,body.dark-mode .article-detail,body.dark-mode .list-card,body.dark-mode .search-form-large,body.dark-mode .pagination a,body.dark-mode .pagination span{background:#1a2231;border-color:var(--line);color:var(--ink)}
body.dark-mode .nav a{color:#c3cadd}
body.dark-mode .search{background:#151c29;border-color:var(--line)}
body.dark-mode .search input{color:var(--ink)}
body.dark-mode .hero,body.dark-mode .search-hero{background:radial-gradient(circle at 85% 15%,#26345c 0,transparent 34%),linear-gradient(120deg,#1b2540,#1a2231 70%);border-color:#303b5c}
body.dark-mode .thumb,body.dark-mode .thumb-placeholder,body.dark-mode .list-thumb-empty{background:#242e42;color:#aebbe0}
body.dark-mode .article-content blockquote{background:#222d42;color:#c3cadd}
body.dark-mode .search-form-large{border-color:var(--line)}
body.dark-mode .search-form-large input{color:var(--ink)}
body.dark-mode .theme-toggle{background:#1a2231;border-color:var(--line);color:var(--ink)}
@media(max-width:600px){.search-page{padding-top:20px}.search-hero{padding:32px 14px 26px}.search-form-large input{padding:13px 12px;font-size:14px}.search-form-large button{padding:0 18px}.result-tip{display:none}}


/* Thumbnail-free article layout */
.article-grid{grid-template-columns:1fr}
.article-card .thumb,.article-card .thumb-placeholder,.list-thumb,.detail-cover{display:none!important}
.article-card{padding:0}
.article-card .card-body{padding:20px 22px}
.article-card .card-body h3{font-size:20px}
.list-card{display:block}
.list-content h2{margin-top:6px}
body.dark-mode .article-card{background:#1a2231;border-color:#30394b}
body.dark-mode .card-body p,body.dark-mode .list-content p{color:#aeb8cc}

/* Robust theme switch */
.theme-toggle{font-family:inherit;line-height:1.3}
body.dark-mode .hero,body.dark-mode .search-hero{color:var(--ink)}