*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}
main{display:block}

:root{
  --green-deep:#0B241F;
  --paper:#F4EEDF;
  --paper-raised:#FBF7EC;
  --neon:#B9F36A;
  --spring:#4F9B3A;
  --summer:#285E8A;
  --autumn:#C85A24;
  --winter:#DDE7E6;
  --ink:#101312;
  --moss:#5E736B;
  --amber:#E8C24A;
  --line:rgba(16,19,18,.14);
  --line-strong:rgba(16,19,18,.3);
  --line-dark:rgba(244,238,223,.18);
  --line-neon:rgba(185,243,106,.45);
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"IBM Plex Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --shell:1248px;
  --gutter:24px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:.18s;
}

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--sans);
  font-weight:800;
  letter-spacing:-.025em;
  line-height:1.14;
  color:var(--green-deep);
}

:focus-visible{outline:2px solid var(--green-deep);outline-offset:3px;border-radius:2px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--neon)}

::selection{background:var(--neon);color:var(--green-deep)}

/* ---------- 布局工具 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}

.section{padding-block:72px}
@media (min-width:900px){.section{padding-block:96px}}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
@media (max-width:900px){
  [class*="col-"]{grid-column:span 12}
  .grid-12{gap:18px}
}

/* ---------- 标题与文本区块 ---------- */
.page-head{padding-block:44px 8px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--moss)}
.eyebrow::before{content:"";width:18px;height:2px;background:currentColor;opacity:.55}
.section-title{font-size:clamp(26px,3.4vw,42px)}
.section-lead{max-width:58ch;margin-top:16px;color:var(--moss);font-size:16px;line-height:1.8}
.prose{max-width:68ch;font-size:16.5px;line-height:1.85}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(22px,2.4vw,28px);margin-top:1.8em}
.prose h3{font-size:19px;margin-top:1.5em}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.5em}
.prose a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px;text-decoration-color:var(--moss);transition:text-decoration-color var(--dur) var(--ease)}
.prose a:hover{text-decoration-color:var(--spring)}
.prose strong{font-weight:700;color:var(--green-deep)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin-top:26px}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--moss)}
.crumb-list li{display:inline-flex;align-items:center;gap:10px}
.crumb-list li+li::before{content:"/";color:var(--moss);opacity:.45}
.crumb-link{text-decoration:none;border-bottom:1px solid transparent;padding-bottom:1px;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.crumb-link:hover{color:var(--green-deep);border-bottom-color:var(--green-deep)}
.crumb-current{color:var(--ink);font-weight:700}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  font-family:inherit;font-size:14px;font-weight:800;letter-spacing:.05em;
  text-decoration:none;cursor:pointer;
  border:1px solid transparent;border-radius:var(--radius);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn-primary{background:var(--neon);color:var(--green-deep);border-color:var(--neon)}
.btn-primary:hover{background:#cdf98d;border-color:#cdf98d}
.btn-ghost{background:transparent;color:var(--green-deep);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--green-deep);background:rgba(11,36,31,.05)}
.btn-sm{padding:9px 16px;font-size:13px}
.btn:active{transform:translateY(1px)}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;text-decoration:none;
  color:var(--green-deep);border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.link-arrow::after{content:"→";font-family:var(--mono);transition:transform var(--dur) var(--ease)}
.link-arrow:hover{border-bottom-color:var(--spring)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 专题研究板组件 ---------- */
.card{
  position:relative;
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 24px;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:0 18px 32px -24px rgba(11,36,31,.6);border-color:rgba(11,36,31,.28)}
.card-label{display:block;font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--moss);margin-bottom:12px}
.card-title{font-size:20px;line-height:1.3}
.card-text{margin-top:10px;font-size:15px;line-height:1.78;color:var(--moss)}
.card-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-family:var(--mono);font-size:12px;color:var(--moss)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius);
  font-size:11px;font-weight:700;letter-spacing:.1em;line-height:1.5;
}
.tag-spring{background:var(--spring);color:var(--paper)}
.tag-summer{background:var(--summer);color:var(--paper)}
.tag-autumn{background:var(--autumn);color:var(--paper)}
.tag-winter{background:var(--winter);color:var(--green-deep)}

.chip-list{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;font-size:13px;font-weight:700;letter-spacing:.04em;
  background:transparent;color:var(--ink);cursor:pointer;
  border:1px solid rgba(16,19,18,.22);border-radius:var(--radius);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--green-deep);background:rgba(185,243,106,.3)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--green-deep);color:var(--neon);border-color:var(--green-deep)}

.data-table{font-size:14px}
.data-table caption{text-align:left;font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--moss);padding-bottom:10px}
.data-table th{
  background:var(--winter);color:var(--green-deep);
  font-size:12px;font-weight:700;letter-spacing:.1em;text-align:left;
  padding:11px 12px;border-bottom:1px solid rgba(11,36,31,.2);
}
.data-table td{padding:12px;border-bottom:1px solid rgba(16,19,18,.1);font-variant-numeric:tabular-nums}
.data-table tbody tr{transition:background var(--dur) var(--ease)}
.data-table tbody tr:hover{background:rgba(185,243,106,.2)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-value{font-family:var(--mono);font-size:clamp(26px,3vw,40px);font-weight:700;line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--green-deep)}
.stat-label{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--moss)}

.note{
  border-left:3px solid var(--neon);
  background:rgba(185,243,106,.16);
  padding:16px 18px;
  font-size:14.5px;line-height:1.78;color:#20372F;
}

/* ---------- 图片容器基础 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--winter);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame[data-ratio="16x9"]{aspect-ratio:16/9}
.media-frame[data-ratio="4x3"]{aspect-ratio:4/3}
.media-frame[data-ratio="1x1"]{aspect-ratio:1/1}
.media-frame[data-ratio="3x4"]{aspect-ratio:3/4}
.media-frame[data-ratio="21x9"]{aspect-ratio:21/9}
.media-frame-empty{display:grid;place-items:center;font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--moss);text-align:center;padding:18px}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-80px;z-index:300;
  padding:12px 18px;
  background:var(--neon);color:var(--green-deep);
  font-size:14px;font-weight:800;letter-spacing:.04em;text-decoration:none;
  border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--green-deep);
  color:var(--paper);
  border-bottom:1px solid var(--line-dark);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(185,243,106,.055) 0 1px,transparent 1px 92px);
}

.header-rail{background:rgba(0,0,0,.3);border-bottom:1px solid var(--line-dark);position:relative}
.rail-inner{display:flex;align-items:center;gap:16px;min-height:34px}
.rail-eyebrow{font-size:11px;font-weight:700;letter-spacing:.14em;color:var(--neon);white-space:nowrap}
.rail-dots{flex:1;height:1px;background:repeating-linear-gradient(90deg,var(--line-dark) 0 6px,transparent 6px 12px)}
.rail-note{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:rgba(244,238,223,.6);white-space:nowrap}

.header-bar{position:relative}
.bar-inner{display:flex;align-items:center;gap:32px;min-height:76px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none;color:var(--paper)}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;
  background:var(--neon);color:var(--green-deep);
  font-family:var(--mono);font-size:14px;font-weight:700;letter-spacing:.02em;
  border-radius:var(--radius);
  transition:background var(--dur) var(--ease);
}
.brand:hover .brand-mark{background:#cdf98d}
.brand-name{display:block;font-size:20px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.brand-tag{display:block;margin-top:5px;font-size:11px;letter-spacing:.16em;color:rgba(244,238,223,.55)}

.nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 12px;
  font-size:14px;font-weight:700;letter-spacing:.02em;text-decoration:none;
  color:rgba(244,238,223,.78);
  border:1px solid transparent;border-radius:var(--radius);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-index{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.06em;color:rgba(185,243,106,.5);transition:color var(--dur) var(--ease)}
.nav-link:hover{color:var(--paper);background:rgba(185,243,106,.08);border-color:rgba(185,243,106,.36)}
.nav-link:hover .nav-index{color:var(--neon)}
.nav-link[aria-current="page"]{color:var(--paper);background:rgba(185,243,106,.12);border-color:var(--line-neon)}
.nav-link[aria-current="page"] .nav-index{color:var(--neon)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--neon);
}

.header-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 12px;background:transparent;
  border:1px solid rgba(244,238,223,.32);border-radius:var(--radius);
  color:var(--paper);font-family:inherit;font-size:12px;font-weight:700;letter-spacing:.12em;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{color:var(--neon);border-color:var(--neon);background:rgba(185,243,106,.08)}
.nav-toggle-bars{position:relative;display:block;width:16px;height:10px;border-top:2px solid currentColor;border-bottom:2px solid currentColor}
.nav-toggle-bars::before{content:"";position:absolute;left:0;right:0;top:2px;height:2px;background:currentColor}
.site-header[data-open] .nav-toggle-bars{border-top-color:transparent;border-bottom-color:transparent}
.site-header[data-open] .nav-toggle-bars::before{transform:rotate(45deg);top:2px}
.site-header[data-open] .nav-toggle-bars::after{
  content:"";position:absolute;left:0;right:0;top:2px;height:2px;background:currentColor;transform:rotate(-45deg);
}

.scroll-gauge{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(244,238,223,.12);overflow:hidden;pointer-events:none}
.scroll-gauge-bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--neon),var(--amber))}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;overflow:hidden;background:var(--green-deep);color:var(--paper)}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 88% -10%,rgba(185,243,106,.13),transparent 48%),
    repeating-linear-gradient(90deg,rgba(244,238,223,.03) 0 1px,transparent 1px 96px);
}

.footer-board{position:relative;border-bottom:1px solid var(--line-dark);background:rgba(0,0,0,.24)}
.board-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line-dark)}
.board-cell{display:flex;flex-direction:column;gap:9px;padding:18px 20px;background:var(--green-deep)}
.board-label{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.2em;color:rgba(185,243,106,.72)}

.copy-line{display:inline-flex;align-items:baseline;gap:10px;min-width:0;padding:0;background:none;border:0;font:inherit;color:var(--paper);text-align:left;cursor:pointer}
.copy-value{font-family:var(--mono);font-size:14.5px;font-weight:700;letter-spacing:.01em;overflow-wrap:anywhere;border-bottom:1px solid rgba(244,238,223,.3);padding-bottom:2px;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.copy-line:hover .copy-value{color:var(--neon);border-bottom-color:var(--neon)}
.copy-hint{flex:0 0 auto;font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.16em;color:rgba(244,238,223,.45);transition:color var(--dur) var(--ease)}
.copy-line:hover .copy-hint{color:var(--neon)}
.copy-line[data-copied] .copy-hint{color:var(--neon)}

.foot-main{position:relative;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.62fr) minmax(0,.62fr);gap:56px;padding-block:64px 56px}
.foot-brand{min-width:0}
.brand-footer .brand-mark{background:var(--neon)}
.foot-statement{max-width:44ch;margin-top:24px;font-size:15px;line-height:1.85;color:rgba(244,238,223,.68)}
.foot-meta{margin-top:18px;font-family:var(--mono);font-size:11.5px;line-height:1.8;letter-spacing:.04em;color:rgba(244,238,223,.42)}

.foot-nav-title{font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--neon);margin-bottom:20px}
.foot-nav-list{display:flex;flex-direction:column;gap:13px}
.foot-link{
  display:inline-block;font-size:14.5px;font-weight:700;text-decoration:none;
  color:rgba(244,238,223,.78);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.foot-link:hover{color:var(--neon);border-bottom-color:var(--neon)}

.foot-bottom{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;
  padding-block:22px 34px;
  border-top:1px solid var(--line-dark);
  font-size:12px;color:rgba(244,238,223,.5);
}
.foot-legal{display:flex;flex-wrap:wrap;gap:20px}
.foot-legal-link{
  font-weight:700;letter-spacing:.06em;text-decoration:none;
  color:rgba(244,238,223,.62);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.foot-legal-link:hover{color:var(--neon);border-bottom-color:var(--neon)}
.foot-copy{margin-left:auto;font-family:var(--mono);letter-spacing:.04em}
.foot-icp{font-family:var(--mono);letter-spacing:.04em;color:rgba(244,238,223,.38)}

/* ---------- 响应式 ---------- */
@media (max-width:1040px){
  :root{--gutter:18px}
  .bar-inner{min-height:64px;gap:14px}
  .brand-tag{display:none}
  .rail-note{display:none}
  .header-tools>.btn{display:none}
  .nav-toggle{display:inline-flex}

  .nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    margin:0;padding:14px var(--gutter) 22px;
    background:var(--green-deep);
    border-top:1px solid var(--line-dark);
    border-bottom:1px solid var(--line-neon);
    box-shadow:0 34px 54px -30px rgba(0,0,0,.9);
    max-height:calc(100vh - 104px);
    overflow-y:auto;
  }
  .site-header[data-open] .nav{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:14px 10px;font-size:15px;border-bottom:1px solid rgba(244,238,223,.1);border-radius:0}
  .nav-link[aria-current="page"]{background:rgba(185,243,106,.14);border-bottom-color:rgba(244,238,223,.1)}
  .nav-link[aria-current="page"]::after{display:none}
  .nav-index{font-size:11px}

  .board-grid{grid-template-columns:1fr}
  .board-cell{padding:16px 0}
  .footer-board .board-grid{background:transparent}
  .footer-board .board-cell{border-bottom:1px solid var(--line-dark)}
  .footer-board .board-cell:last-child{border-bottom:0}

  .foot-main{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px 32px;padding-block:48px 40px}
  .foot-brand{grid-column:1 / -1}
  .foot-copy{margin-left:0}
}

@media (max-width:620px){
  body{font-size:16px}
  .rail-inner{min-height:30px}
  .rail-eyebrow{font-size:10px;letter-spacing:.1em}
  .foot-main{grid-template-columns:1fr;gap:36px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .data-table{font-size:13px}
  .section{padding-block:56px}
}

@media print{
  .site-header,.skip-link,.scroll-gauge,.nav-toggle{display:none}
  .site-footer{background:#fff;color:#000}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover{transform:none}
  .link-arrow:hover::after{transform:none}
}