:root{
  --bg:#f4f8ff;
  --panel:#ffffff;
  --panel-soft:#f8fbff;
  --line:#dbe6f5;
  --text:#152033;
  --muted:#66758c;
  --primary:#246bff;
  --primary-deep:#174ec9;
  --accent:#12c2b3;
  --shadow:0 12px 30px rgba(28,73,146,.08);
  --radius:20px;
  --radius-sm:14px;
  --max:1240px;
}

*,
*::before,
*::after{
  box-sizing:border-box;
}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(36,107,255,.08), transparent 30%),
    radial-gradient(circle at right top, rgba(18,194,179,.10), transparent 24%),
    var(--bg);
  line-height:1.7;
  overflow-x:hidden;
}

img{
  display:block;
  max-width:100%;
  height:auto;
  border:0;
}

a{
  color:inherit;
  text-decoration:none;
}

button,
input,
textarea,
select{
  font:inherit;
}

.container{
  width:min(var(--max), calc(100% - 32px));
  margin:0 auto;
}

.site-shell{
  min-height:100vh;
}

.page-main{
  min-height:60vh;
}

.site-header{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter:blur(12px);
  background:rgba(244,248,255,.85);
  border-bottom:1px solid rgba(219,230,245,.8);
}

.topbar-inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:74px;
}

.site-brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  flex:1;
}

.brand-mark{
  width:42px;
  height:42px;
  border-radius:14px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 10px 20px rgba(36,107,255,.22);
  position:relative;
}

.brand-mark::after{
  content:"";
  position:absolute;
  inset:10px;
  border-radius:9px;
  border:2px solid rgba(255,255,255,.85);
}

.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.brand-text strong{
  font-size:1.1rem;
  line-height:1.2;
}

.brand-text em{
  font-size:.82rem;
  color:var(--muted);
  font-style:normal;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
}

.search-form{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}

.search-form input{
  width:100%;
  min-width:0;
  height:44px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  color:var(--text);
  outline:none;
}

.search-form input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(36,107,255,.10);
}

.search-form button,
.btn-primary,
.btn-secondary{
  height:44px;
  padding:0 18px;
  border-radius:999px;
  border:0;
  cursor:pointer;
  transition:.25s ease;
  white-space:nowrap;
}

.search-form button,
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#fff;
}

.btn-secondary{
  background:#fff;
  color:var(--primary);
  border:1px solid var(--line);
}

.search-form button:hover,
.btn-primary:hover,
.btn-secondary:hover{
  transform:translateY(-1px);
}

.header-search{
  width:340px;
  max-width:38vw;
}

.about-link{
  color:var(--text);
  font-weight:600;
  padding:10px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.72);
  border:1px solid var(--line);
}

.nav-wrap{
  border-top:1px solid rgba(219,230,245,.65);
}

.nav-inner{
  display:flex;
  align-items:center;
  min-height:54px;
}

.main-nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px 12px;
}

.main-nav a{
  padding:8px 12px;
  border-radius:999px;
  color:var(--muted);
  transition:.2s ease;
}

.main-nav a:hover{
  background:#fff;
  color:var(--primary);
}

.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  align-items:center;
  justify-content:center;
  padding:0;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
}

.menu-toggle span{
  width:18px;
  height:2px;
  background:var(--text);
  border-radius:2px;
}

.hero-section,
.sub-banner,
.article-banner,
.content-section{
  padding:24px 0;
}

.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(280px,.9fr);
  gap:24px;
}

.hero-feature{
  background:linear-gradient(135deg,#0f1f44,#15346f 60%,#165d8a);
  color:#fff;
  border-radius:28px;
  overflow:hidden;
  box-shadow:var(--shadow);
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);
}

.hero-copy{
  padding:34px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.82rem;
  color:var(--accent);
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
}

.hero-copy h1,
.sub-banner h1,
.article-header h1{
  margin:12px 0;
  line-height:1.2;
  word-break:break-word;
}

.hero-copy h1{
  font-size:clamp(1.8rem,4vw,3rem);
}

.hero-copy p{
  color:rgba(255,255,255,.82);
  max-width:60ch;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:12px;
}

.hero-media,
.sub-banner-pic,
.article-cover,
.thumb-wrap,
.stack-thumb,
.mini-item img,
.mini-item-block img{
  overflow:hidden;
}

.hero-media img{
  width:100%;
  height:100%;
  min-height:100%;
  aspect-ratio:1/1;
  object-fit:cover;
}

.hero-side,
.side-panel,
.panel,
.news-card,
.stack-item,
.site-footer{
  min-width:0;
}

.compact-panel,
.side-panel,
.panel{
  background:var(--panel);
  border:1px solid rgba(219,230,245,.9);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.panel,
.side-panel{
  padding:20px;
}

.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:16px;
}

.panel-head h2{
  margin:0;
  font-size:1.15rem;
}

.more-link,
.text-link{
  color:var(--primary);
  font-weight:600;
}

.main-layout{
  display:grid;
  grid-template-columns:minmax(0,1.75fr) minmax(300px,.85fr);
  gap:24px;
  align-items:start;
}

.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1.9fr) minmax(300px,.8fr);
  gap:24px;
  align-items:start;
}

.news-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}

.news-grid-featured{
  grid-template-columns:repeat(3,minmax(0,1fr));
}

.news-card{
  background:var(--panel-soft);
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}

.thumb-wrap{
  display:block;
}

.thumb-wrap img,
.stack-thumb img,
.mini-item img,
.mini-item-block img,
.sub-banner-pic img,
.article-cover img{
  width:100%;
  height:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}

.news-card-body{
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:10px;
  min-height:0;
}

.news-card-body h3,
.stack-content h3{
  margin:0;
  font-size:1.08rem;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.news-card-body p,
.stack-content p,
.about-content p{
  margin:0;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.meta,
.stack-meta,
.article-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px 14px;
  color:var(--muted);
  font-size:.92rem;
}

.tag{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(36,107,255,.08);
  color:var(--primary);
  font-size:.84rem;
  font-weight:700;
}

.stack-list{
  display:flex;
  flex-direction:column;
  gap:18px;
}

.stack-item{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:16px;
  padding:16px;
  background:var(--panel-soft);
  border:1px solid var(--line);
  border-radius:18px;
}

.stack-item-large{
  grid-template-columns:260px minmax(0,1fr);
}

.stack-thumb{
  border-radius:14px;
}

.stack-content{
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.rank-list,
.mini-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}

.rank-item{
  display:grid;
  grid-template-columns:34px minmax(0,1fr);
  gap:12px;
  align-items:flex-start;
}

.rank-item strong{
  display:flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  font-size:.95rem;
}

.rank-item span,
.mini-item span{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.rank-item em,
.mini-item em{
  display:block;
  color:var(--muted);
  font-style:normal;
  font-size:.88rem;
  margin-top:4px;
}

.mini-item{
  display:grid;
  grid-template-columns:76px minmax(0,1fr);
  gap:12px;
  align-items:center;
}

.mini-item img{
  border-radius:12px;
  aspect-ratio:4/3;
}

.mini-item-block{
  align-items:start;
}

.mini-item-block div{
  min-width:0;
}

.site-info-card,
.contact-card,
.about-content{
  color:var(--muted);
}

.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  color:var(--muted);
  font-size:.94rem;
  margin-bottom:14px;
}

.sub-banner-inner,
.search-banner-box{
  background:linear-gradient(135deg,#ffffff,#f2f7ff);
  border:1px solid var(--line);
  border-radius:28px;
  box-shadow:var(--shadow);
  padding:24px;
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(240px,.8fr);
  gap:24px;
  align-items:center;
}

.search-banner-box{
  grid-template-columns:minmax(0,1fr) minmax(320px,.9fr);
}

.sub-banner-pic{
  border-radius:20px;
}

.article-main{
  min-width:0;
}

.article-header{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:24px;
  padding:26px;
  box-shadow:var(--shadow);
}

.article-cover{
  margin-top:18px;
  border-radius:24px;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}

.article-cover img{
  aspect-ratio:21/9;
}

.article-content{
  margin-top:18px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:24px;
  padding:24px;
  box-shadow:var(--shadow);
  overflow:hidden;
}

.article-content img{
  max-width:100%;
  height:auto;
  object-fit:cover;
}

.article-content table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
}

.article-content *{
  max-width:100%;
  word-wrap:break-word;
  overflow-wrap:break-word;
}

.related-panel{
  margin-top:18px;
}

.sticky-panel{
  position:sticky;
  top:110px;
}

.pagination{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}

.pagination a{
  min-width:42px;
  height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--text);
}

.empty-tip{
  margin-bottom:16px;
  padding:14px 16px;
  border-radius:16px;
  background:#f7fbff;
  border:1px dashed var(--line);
  color:var(--muted);
}

.site-footer{
  margin-top:28px;
  background:#101a30;
  color:rgba(255,255,255,.82);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.2fr .9fr .9fr;
  gap:18px;
  padding:34px 0;
}

.footer-card{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  border-radius:20px;
  padding:20px;
}

.footer-card h3{
  margin:0 0 12px;
  color:#fff;
}

.footer-list{
  margin:0;
  padding:0;
  list-style:none;
}

.footer-list li+li{
  margin-top:8px;
}

.footer-list a{
  color:rgba(255,255,255,.82);
}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
}

.footer-bottom-inner{
  min-height:62px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}

.error-page-body{
  min-height:100vh;
  background:
    radial-gradient(circle at top, rgba(36,107,255,.18), transparent 28%),
    linear-gradient(180deg,#f4f8ff,#edf4ff);
}

.error-page{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

.error-card{
  width:min(720px,100%);
  background:#fff;
  border:1px solid var(--line);
  border-radius:28px;
  box-shadow:var(--shadow);
  padding:32px;
  text-align:center;
}

.error-code{
  display:inline-block;
  font-size:4rem;
  font-weight:800;
  line-height:1;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.error-actions{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:12px;
  margin-top:18px;
}

.search-form-large{
  width:100%;
  margin-top:18px;
}

.search-form-large input{
  flex:1;
}

@media (max-width: 1100px){
  .hero-grid,
  .main-layout,
  .article-layout,
  .footer-grid,
  .news-grid-featured,
  .sub-banner-inner,
  .search-banner-box{
    grid-template-columns:1fr;
  }

  .hero-feature{
    grid-template-columns:1fr;
  }

  .header-search{
    width:280px;
    max-width:32vw;
  }
}

@media (max-width: 768px){
  .container{
    width:min(var(--max), calc(100% - 24px));
  }

  .topbar-inner{
    flex-wrap:wrap;
    padding:10px 0;
  }

  .menu-toggle{
    display:inline-flex;
    order:2;
  }

  .header-tools{
    width:100%;
    order:3;
    flex-direction:column;
    align-items:stretch;
  }

  .header-search{
    width:100%;
    max-width:none;
  }

  .about-link{
    text-align:center;
  }

  .nav-wrap{
    display:none;
  }

  .nav-wrap.is-open{
    display:block;
  }

  .nav-inner{
    padding:10px 0 16px;
  }

  .main-nav{
    flex-direction:column;
    align-items:stretch;
  }

  .main-nav a{
    background:#fff;
    border:1px solid var(--line);
  }

  .news-grid{
    grid-template-columns:1fr;
  }

  .stack-item,
  .stack-item-large{
    grid-template-columns:1fr;
  }

  .panel,
  .side-panel,
  .article-header,
  .article-content,
  .error-card{
    padding:18px;
  }

  .hero-copy{
    padding:24px;
  }

  .hero-copy p{
    max-width:none;
  }

  .search-form{
    flex-wrap:nowrap;
  }

  .search-form input{
    min-width:0;
  }

  .footer-bottom-inner{
    align-items:flex-start;
    flex-direction:column;
  }

  .sticky-panel{
    position:static;
  }
}

@media (max-width: 480px){
  .hero-copy h1,
  .sub-banner h1,
  .article-header h1{
    font-size:1.55rem;
  }

  .search-form,
  .search-form-large{
    flex-direction:column;
    align-items:stretch;
  }

  .search-form button,
  .btn-primary,
  .btn-secondary{
    width:100%;
  }

  .mini-item{
    grid-template-columns:72px minmax(0,1fr);
  }

  .article-cover img{
    aspect-ratio:16/10;
  }
}