:root{
  --primary:#234f86;--primary-dark:#183d68;--primary-light:#eef4f9;
  --accent:#6f8faa;--text:#25313d;--muted:#697786;--line:#dce4eb;
  --bg:#f5f7f9;--white:#fff
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:62px}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--text);background:var(--bg)}

.site-header{
  min-height:118px;display:flex;align-items:stretch;
  background:linear-gradient(115deg,var(--primary-dark),var(--primary),#496f98);color:#fff
}
.brand{
  width:210px;flex:0 0 210px;padding:22px 26px;
  border-right:1px solid rgba(255,255,255,.18);
  display:flex;flex-direction:column;justify-content:center
}
.brand-title{font-size:27px;font-weight:700;letter-spacing:.2px;line-height:1.1}
.brand-subtitle{margin-top:7px;font-size:13px;opacity:.75}
.page-title{padding:18px clamp(34px,5vw,78px);flex:1;display:flex;flex-direction:column;justify-content:center}
.eyebrow{display:block;min-height:16px;letter-spacing:2px;font-size:10px;font-weight:700;opacity:.65}
.page-title h1{margin:3px 0 8px;font-size:34px;line-height:1.22;font-weight:500}
.page-title p{margin:0;font-size:15px;opacity:.82}

.data-summary-line {
  margin-top: 12px;
  padding: 12px 18px;
  border: 1px solid #d7dee8;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.45);
  color: #50657a;
  font-size: 16px;
  line-height: 1.6;
  white-space: normal;
}
.section-nav{
  position:-webkit-sticky!important;position:sticky!important;top:0!important;
  z-index:9999!important;min-height:54px;display:flex;align-items:center;gap:4px;
  overflow-x:auto;padding:0 5vw;background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--line);box-shadow:0 2px 9px rgba(27,55,84,.08)
}
.section-nav a{display:block;padding:17px 15px;color:var(--muted);text-decoration:none;font-size:14px;white-space:nowrap}
.section-nav a:hover,.section-nav a.active{color:var(--primary);box-shadow:inset 0 -2px 0 var(--primary)}

.container{max-width:1480px;margin:0 auto;padding:30px 28px 60px}
.section-block{margin-bottom:46px}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.section-heading>div{display:flex;align-items:baseline;gap:12px}
.section-index{color:var(--accent);font-size:13px;letter-spacing:1px}
.section-heading h2{margin:0;font-size:26px;font-weight:500;color:var(--primary-dark)}
.section-heading p{margin:0;max-width:680px;color:var(--muted);font-size:13px;line-height:1.7;text-align:right}
.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:12px}
.summary-card{min-height:126px;padding:18px;background:var(--white);border:1px solid var(--line);border-radius:6px}
.summary-card .label{color:var(--muted);font-size:14px;line-height:1.45}
.summary-card .value{margin:12px 0 6px;font-size:30px;color:var(--primary)}
.summary-card .meta{color:var(--muted);font-size:12px;line-height:1.5}
.chart-grid{display:grid;gap:18px}
.chart-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.chart-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.chart-card{min-width:0;background:var(--white);border:1px solid var(--line);border-radius:6px;padding:8px}
.chart{width:100%;min-height:430px}.chart.compact{min-height:360px}.smell-row{margin-top:18px}.smell-three{margin-top:0}
.method-note{margin-top:12px;padding:14px 16px;background:#f7f9fb;border-left:3px solid var(--primary);color:#536170;font-size:13px;line-height:1.85}
.site-footer{display:flex;justify-content:space-between;padding:24px 5vw;background:#203548;color:rgba(255,255,255,.65);font-size:12px}
@media(max-width:1100px){.chart-grid.two,.chart-grid.three{grid-template-columns:1fr}}
@media(max-width:900px){
  .site-header{display:block}.brand{width:auto;padding:18px 6vw;border-right:0;border-bottom:1px solid rgba(255,255,255,.18)}
  .page-title{padding:24px 6vw}.page-title h1{font-size:29px}
  .section-heading{display:block}.section-heading p{margin-top:10px;text-align:left}
}