:root{
  --ink:#0B2622;
  --ink-2:#123B34;
  --ink-3:#1B554A;
  --paper:#E9E1CB;
  --paper-2:#D8C9A3;
  --amber:#C89A2E;
  --amber-lit:#E7BC5B;
  --silver:#B9C4C2;
  --red:#D2432C;
  --line:#7FB2A6;
  --deep:#04140F;
  --shell:1240px;
  --gut:clamp(16px,4vw,40px);
  --header-h:68px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-hard:6px 6px 0 var(--deep);
  --font-display:"Helvetica Neue","Arial Narrow",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:Georgia,"Songti SC","Source Han Serif SC","Noto Serif CJK SC",SimSun,serif;
  --font-mono:ui-monospace,"SFMono-Regular","SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100%;
  background-color:var(--ink);
  background-image:radial-gradient(rgba(233,225,203,.05) 1px,transparent 1px);
  background-size:4px 4px;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17.5px);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{max-width:100%}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,table{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- 排版工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.05em;
}
.h-display{
  font-family:var(--font-display);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.12em;
  line-height:1.06;
}
.h-xl{font-size:clamp(34px,7vw,88px)}
.h-lg{font-size:clamp(28px,4.4vw,56px)}
.h-md{font-size:clamp(21px,2.6vw,34px)}
.lede{font-size:clamp(17px,1.5vw,21px);line-height:1.8;color:var(--paper-2);max-width:46ch}
.kicker{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
}

/* ---------- 容器与分隔 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.band{height:8px;width:100%;background:var(--amber)}
.band-amber{background:var(--amber)}
.band-silver{background:var(--line)}
.band-red{background:var(--red)}
.stack>*+*{margin-top:1.2em}

/* ---------- 章节头 ---------- */
.section{padding-block:clamp(36px,5vw,72px)}
.section-head{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.42fr);
  gap:10px clamp(16px,3vw,40px);
  align-items:end;
  padding-bottom:14px;
  border-bottom:2px solid var(--ink-3);
  margin-bottom:clamp(20px,3vw,36px);
}
.section-num{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.16em;
  color:var(--amber);
  display:block;
  margin-bottom:8px;
}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3.4vw,40px);
  letter-spacing:.1em;
  line-height:1.1;
  text-transform:uppercase;
}
.section-note{font-size:14.5px;color:var(--paper-2);max-width:34ch}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-twelve{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:8px}

/* ---------- 卡片 ---------- */
.card{
  background:var(--ink-2);
  border:2px solid var(--ink-3);
  box-shadow:var(--shadow-hard);
  padding:clamp(16px,2vw,26px);
  transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.card:hover{transform:translate(-2px,-2px);border-color:var(--amber);background:var(--ink-3)}
.card-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:2px solid var(--ink-3);
}
.card-title{font-family:var(--font-display);font-weight:700;font-size:16px;letter-spacing:.1em;text-transform:uppercase}

/* ---------- 表格 ---------- */
.data-table{
  width:100%;
  border:2px solid var(--line);
  background:var(--ink-2);
  font-size:15px;
}
.data-table caption{
  caption-side:top;
  text-align:left;
  padding:11px 14px;
  background:var(--ink);
  border-bottom:2px solid var(--line);
  font-family:var(--font-display);
  font-weight:700;
  font-size:13px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--amber-lit);
}
.data-table th,.data-table td{
  padding:10px 14px;
  border:1px solid rgba(127,178,166,.35);
  text-align:left;
  vertical-align:top;
}
.data-table thead th{
  background:var(--ink-3);
  color:var(--paper);
  font-family:var(--font-display);
  font-weight:700;
  font-size:12.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
}
.data-table tbody tr:nth-child(even){background:rgba(27,85,74,.34)}
.data-table tbody tr:hover{background:var(--ink-3)}
.data-table .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--silver);
  white-space:nowrap;
}

/* ---------- 文本块 ---------- */
.prose{max-width:68ch;color:var(--paper-2);font-size:16.5px;line-height:1.85}
.prose p+p{margin-top:1.2em}
.prose strong{color:var(--paper)}
.prose a{color:var(--amber-lit);border-bottom:1px solid rgba(231,188,91,.45)}
.prose ul{margin:1.1em 0 1.1em 1.3em;list-style:square}
.prose li+li{margin-top:.5em}
.note{
  border-left:2px solid var(--line);
  padding:4px 0 4px 16px;
  font-size:14.5px;
  color:var(--paper-2);
}

/* ---------- 标签、代码、KPI ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  padding:3px 9px;
  border:1px solid var(--line);
  color:var(--silver);
  white-space:nowrap;
}
.tag-amber{border-color:var(--amber);color:var(--amber-lit);background:rgba(200,154,46,.14)}
.tag-red{border-color:var(--red);color:#F6D3CB;background:rgba(210,67,44,.2)}
.code{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--silver);
  border:1px solid var(--line);
  padding:1px 7px;
  letter-spacing:.05em;
}
.kpi{
  background:var(--ink-2);
  border:2px solid var(--ink-3);
  border-left:4px solid var(--amber);
  box-shadow:var(--shadow-hard);
  padding:16px 18px;
}
.kpi-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(23px,3vw,34px);
  line-height:1.1;
  color:var(--paper);
}
.kpi-label{font-size:13px;letter-spacing:.06em;color:var(--paper-2);margin-top:6px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:13.5px;
  letter-spacing:.08em;
  line-height:1;
  padding:11px 16px;
  border:2px solid var(--amber);
  border-radius:2px;
  white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--amber);color:#07201C;box-shadow:4px 4px 0 var(--deep)}
.btn-primary:hover{background:var(--amber-lit);border-color:var(--amber-lit);transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--deep)}
.btn-primary:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--deep)}
.btn-ghost{background:transparent;border-color:var(--ink-3);color:var(--paper-2)}
.btn-ghost:hover{border-color:var(--line);color:var(--paper);background:var(--ink-2)}
.btn-red{background:var(--red);border-color:var(--red);color:#FBEDE9;box-shadow:4px 4px 0 var(--deep)}
.btn-red:hover{background:#E0523A;border-color:#E0523A;transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--deep)}
.btn-sm{padding:8px 12px;font-size:12.5px}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  border:2px solid var(--line);
  background:var(--ink-2);
  box-shadow:var(--shadow-hard);
  overflow:hidden;
}
.media-frame::before{content:"";display:block;padding-top:56.25%}
.media-frame[data-ratio="4:3"]::before{padding-top:75%}
.media-frame[data-ratio="16:10"]::before{padding-top:62.5%}
.media-frame[data-ratio="1:1"]::before{padding-top:100%}
.media-frame>img,.media-frame>svg,.media-frame>.media-ph{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  object-fit:cover;
}
.media-ph{
  display:grid;
  place-items:center;
  padding:14px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--silver);
  background:
    repeating-linear-gradient(135deg,rgba(127,178,166,.14) 0 8px,transparent 8px 16px),
    var(--ink-2);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--silver);
  padding-block:14px;
}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li:not(:last-child)::after{content:"/";margin:0 9px;color:var(--line);opacity:.65}
.breadcrumb a{color:var(--paper-2)}
.breadcrumb a:hover{color:var(--amber-lit)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-80px;
  z-index:200;
  padding:10px 16px;
  background:var(--amber);
  color:#07201C;
  border:2px solid var(--deep);
  font-family:var(--font-display);
  font-weight:700;
  font-size:13.5px;
  letter-spacing:.08em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}

/* ================= 头部 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--ink);
  border-bottom:2px solid var(--ink-3);
  color:var(--paper);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header[data-compact]{
  background:#081D1A;
  box-shadow:0 6px 0 rgba(4,20,15,.55);
}
.progress-rail{
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:3px;
  background:rgba(127,178,166,.16);
  overflow:hidden;
}
.progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--amber),var(--amber-lit));
  transition:width .12s linear;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,26px);
  min-height:var(--header-h);
  padding-block:11px;
  transition:min-height .3s var(--ease),padding .3s var(--ease);
}
.site-header[data-compact] .header-inner{min-height:56px;padding-block:6px}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding-left:11px;
  border-left:3px solid var(--amber);
  color:var(--paper);
}
.brand-vol{font-size:11.5px;color:var(--amber);letter-spacing:.16em;white-space:nowrap}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:.1em;
  line-height:1;
  transition:color .2s var(--ease);
}
.brand:hover .brand-name{color:var(--amber-lit)}
.brand-sub{font-size:11px;color:var(--silver);letter-spacing:.16em;white-space:nowrap}

.header-locator{
  display:none;
  align-items:center;
  gap:9px;
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--paper-2);
  padding:5px 14px;
  border-left:1px solid var(--ink-3);
  border-right:1px solid var(--ink-3);
  white-space:nowrap;
}
.header-locator .locator-id{font-size:12.5px;color:var(--amber-lit)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 12px;
  border:2px solid var(--ink-3);
  border-radius:2px;
  color:var(--paper-2);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--line);color:var(--paper)}
.nav-toggle-text{font-family:var(--font-display);font-weight:700;font-size:12.5px;letter-spacing:.1em}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars i{display:block;height:2px;background:currentColor;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle-bars i:nth-child(2){width:70%}
.site-header[data-open] .nav-toggle{background:var(--amber);border-color:var(--amber);color:#07201C}
.site-header[data-open] .nav-toggle-bars i{background:#07201C}
.site-header[data-open] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.nav-rail{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.4vw,22px);
}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 11px 11px;
  font-size:14.5px;
  letter-spacing:.04em;
  color:var(--paper-2);
  border-radius:2px;
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-num{font-size:10.5px;color:var(--silver);letter-spacing:.08em}
.nav-link:hover{color:var(--paper);background:var(--ink-2)}
.nav-link:hover .nav-num{color:var(--amber)}
.nav-link[aria-current="page"]{color:var(--paper)}
.nav-link[aria-current="page"] .nav-num{color:var(--amber-lit)}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:3px;
  height:2px;
  background:var(--amber);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

@media (min-width:1180px){
  .header-locator{display:inline-flex}
}
@media (max-width:1080px) and (min-width:961px){
  .nav-num{display:none}
  .nav-link{padding:9px 8px 11px;font-size:13.5px}
  .btn{padding:10px 12px;font-size:12.5px}
}

/* ================= 页脚 ================= */
.site-footer{
  margin-top:clamp(40px,6vw,88px);
  background:var(--ink-2);
  border-top:2px solid var(--ink-3);
  color:var(--paper-2);
  font-size:14.5px;
}
.mountain-divider{
  max-width:var(--shell);
  margin-inline:auto;
  padding:26px var(--gut) 0;
}
.mountain-divider svg{
  display:block;
  width:100%;
  height:clamp(46px,6vw,84px);
  color:var(--line);
  transition:color .6s var(--ease);
}
.mountain-divider.is-lit svg{color:var(--amber)}
.ridge{fill:none;stroke:currentColor;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}

.footer-brand{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 20px;
  padding-block:20px 22px;
  border-bottom:2px solid var(--ink-3);
}
.footer-brand .brand-name{font-size:17px}
.footer-brand-note{font-size:12px;color:var(--silver);letter-spacing:.14em}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding-block:clamp(24px,3.4vw,40px);
}
.footer-col{min-width:0}
.footer-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:13.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber-lit);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px solid var(--ink-3);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:14.5px;
  color:var(--paper-2);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.footer-links a::before{
  content:"";
  width:6px;
  height:6px;
  flex:0 0 auto;
  background:var(--ink-3);
  transition:background .2s var(--ease);
}
.footer-links a:hover{color:var(--paper);border-color:var(--amber);transform:translateX(3px)}
.footer-links a:hover::before{background:var(--amber)}

.footer-contact{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px clamp(16px,3vw,40px);
  padding-block:24px;
  border-top:2px solid var(--ink-3);
}
.contact-item{display:flex;flex-direction:column;gap:6px;min-width:0}
.contact-label{font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--silver)}
.contact-value{font-size:14.5px;color:var(--paper);word-break:break-word}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-block:18px 28px;
  border-top:2px solid var(--ink-3);
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--silver);
}

@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:1fr}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

/* ---------- 网格响应式 ---------- */
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section-head{grid-template-columns:minmax(0,1fr)}
  .section-note{max-width:52ch}
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .data-table{font-size:14px}
  .data-table th,.data-table td{padding:9px 10px}
}

/* ---------- 移动导航 ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .brand-sub{display:none}
  .nav-rail{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--ink-2);
    border-top:2px solid var(--amber);
    border-bottom:2px solid var(--ink-3);
    padding:8px var(--gut) 22px;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    box-shadow:0 12px 0 rgba(4,20,15,.45);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
  }
  .site-header[data-open] .nav-rail{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-item{border-bottom:1px solid rgba(127,178,166,.22)}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    gap:12px;
    padding:14px 4px;
    font-size:16.5px;
  }
  .nav-num{font-size:12px;color:var(--amber)}
  .nav-link[aria-current="page"]::after{left:4px;right:auto;width:24px;bottom:9px}
  .nav-actions{flex-direction:column;align-items:stretch;gap:10px;margin-top:20px;width:100%}
  .nav-actions .btn{width:100%;padding:13px 16px}
}

/* ---------- 动效 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
}
.has-reveal [data-reveal].is-shown{
  opacity:1;
  transform:none;
  transition:opacity .44s var(--ease),transform .44s var(--ease);
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:120ms !important;
    scroll-behavior:auto !important;
  }
  .has-reveal [data-reveal]{opacity:1 !important;transform:none !important}
  .mountain-divider.is-lit svg{color:var(--amber)}
}