*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg{max-width:100%}
button{font:inherit}

:root{
  --ink:#1A1F26;
  --ink-2:#5F6B7A;
  --paper:#F4F7FB;
  --paper-2:#E6EDF5;
  --navy:#0B1E3A;
  --navy-2:#102A4C;
  --navy-3:#2B4A6F;
  --mint:#00E5A8;
  --amber:#FF8A3D;
  --wine:#8E1F3F;
  --violet:#5B3FA8;
  --rail-w:84px;
  --rail-open:272px;
  --topbar-h:60px;
  --gutter:clamp(18px,4vw,56px);
  --hair:rgba(11,30,58,.14);
  --hair-dark:rgba(0,229,168,.22);
  --sans:"Noto Sans SC","Source Han Sans SC",PingFang SC,"Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono",Consolas,"Liberation Mono",monospace;
}

body{
  padding-left:var(--rail-w);
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{margin:0 0 .5em;color:var(--navy);font-family:var(--sans);font-weight:900;letter-spacing:-.02em;line-height:1.16}
h1{font-size:clamp(38px,5.6vw,74px)}
h2{font-size:clamp(26px,3.4vw,38px)}
h3{font-size:clamp(19px,2vw,23px);font-weight:800;letter-spacing:-.01em}
p{margin:0 0 1em}
a{color:var(--navy);text-decoration:none}
strong,b{font-weight:800}
ul,ol{margin:0 0 1em;padding-inline-start:1.2em}
.mono{font-family:var(--mono);font-size:13px;letter-spacing:.04em}

:focus-visible{outline:2px solid var(--mint);outline-offset:2px}

.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;background:var(--mint);color:var(--navy);
  font:700 13px/1 var(--sans);letter-spacing:.02em;
  transition:transform .16s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 头部：侧边状态轨道 ---------- */
.site-head{position:relative;z-index:70;display:block}

.rail{
  position:fixed;top:0;bottom:0;left:0;z-index:60;
  width:var(--rail-w);
  display:flex;flex-direction:column;
  background:var(--navy);
  border-right:1px solid var(--hair-dark);
  overflow-x:hidden;overflow-y:auto;
  transition:width .22s ease;
  scrollbar-width:thin;scrollbar-color:var(--navy-3) var(--navy);
}
.rail:hover,.rail:focus-within{width:var(--rail-open)}

.rail__brand{
  display:flex;align-items:center;gap:12px;flex:0 0 auto;
  padding:20px 16px 20px 20px;color:#fff;text-decoration:none;
}
.rail__mark{
  flex:0 0 auto;display:grid;place-items:center;
  width:40px;height:40px;
  font:700 11px/1 var(--mono);letter-spacing:.08em;
  color:var(--mint);background:rgba(0,229,168,.12);
  border:1px solid rgba(0,229,168,.55);
}
.rail__brandtext{font:800 15px/1.2 var(--sans);letter-spacing:.04em;color:#fff}

.rail__status{
  display:flex;align-items:center;gap:10px;
  margin:0 0 20px;padding:0 20px;
  font:600 11px/1.4 var(--mono);letter-spacing:.06em;color:var(--mint);
}

.rail__nav{flex:1 1 auto;min-height:0}
.rail__list{list-style:none;margin:0;padding:0}
.rail__link{
  display:flex;align-items:center;gap:14px;
  padding:12px 20px;
  border-left:2px solid transparent;
  color:rgba(255,255,255,.72);
  font-size:14px;line-height:1.4;white-space:nowrap;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.rail__link:hover{color:#fff;background:rgba(255,255,255,.06);border-left-color:rgba(0,229,168,.6)}
.rail__link[aria-current="page"]{color:#fff;background:rgba(0,229,168,.12);border-left-color:var(--mint)}
.rail__link[aria-current="page"] .rail__idx{color:var(--mint)}
.rail__idx{flex:0 0 auto;width:22px;font:600 11px/1 var(--mono);letter-spacing:.04em;color:rgba(0,229,168,.6)}

.rail__cta{
  margin:auto 16px 22px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 10px;
  background:var(--mint);color:var(--navy);
  font:700 13px/1.2 var(--sans);white-space:nowrap;
  overflow:hidden;border:1px solid var(--mint);
  transition:background .18s ease,color .18s ease;
}
.rail__cta:hover{background:#4bf2c2}

.rail__word{
  display:inline-block;max-width:0;opacity:0;overflow:hidden;
  white-space:nowrap;vertical-align:bottom;
  transition:max-width .22s ease,opacity .18s ease;
}
.rail__short{
  display:inline-block;max-width:140px;opacity:1;overflow:hidden;
  white-space:nowrap;transition:max-width .22s ease,opacity .18s ease;
}
.rail:hover .rail__word,.rail:focus-within .rail__word{max-width:240px;opacity:1}
.rail:hover .rail__short,.rail:focus-within .rail__short{max-width:0;opacity:0}

.lamp{
  display:inline-block;flex:0 0 auto;
  width:8px;height:8px;background:var(--mint);
  box-shadow:0 0 0 3px rgba(0,229,168,.18);
}
.lamp--on-dark{box-shadow:0 0 0 3px rgba(0,229,168,.22)}

/* ---------- 移动顶栏 ---------- */
.topbar{display:none}
.topbar__brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.topbar__mark{
  display:grid;place-items:center;width:28px;height:28px;
  font:700 9px/1 var(--mono);letter-spacing:.06em;
  color:var(--mint);border:1px solid rgba(0,229,168,.55);background:rgba(0,229,168,.12);
}
.topbar__name{font:800 15px/1.2 var(--sans);letter-spacing:.02em}
.topbar__state{
  display:flex;align-items:center;gap:8px;margin-left:14px;
  font:600 10px/1.4 var(--mono);letter-spacing:.06em;color:var(--mint);
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;margin-left:auto;
  padding:9px 12px;background:transparent;cursor:pointer;
  border:1px solid rgba(0,229,168,.5);color:var(--mint);
  font:600 11px/1 var(--mono);letter-spacing:.08em;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:rgba(0,229,168,.14)}
.nav-toggle[aria-expanded="true"]{background:rgba(0,229,168,.2);color:#fff;border-color:var(--mint)}
.nav-toggle__bars{
  position:relative;display:block;width:18px;height:12px;
  background:linear-gradient(currentColor,currentColor) center/18px 2px no-repeat;
}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;
  background:currentColor;transition:transform .18s ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- 滚动进度 ---------- */
.scroll-meter{
  position:fixed;top:0;left:var(--rail-w);right:0;height:3px;z-index:80;
  background:transparent;pointer-events:none;
}
.scroll-meter__bar{
  display:block;height:100%;width:100%;background:var(--mint);
  transform:scaleX(0);transform-origin:0 50%;
}

/* ---------- 页脚 ---------- */
.site-foot{
  margin-top:clamp(48px,7vw,96px);
  background:var(--navy);color:rgba(255,255,255,.76);
}
.foot__signal{display:grid;grid-template-columns:repeat(4,1fr);height:4px}
.foot__sig{display:block;height:100%}
.foot__sig--mint{background:var(--mint)}
.foot__sig--amber{background:var(--amber)}
.foot__sig--wine{background:var(--wine)}
.foot__sig--violet{background:var(--violet)}

.foot__inner{
  max-width:1180px;margin:0 auto;
  padding:56px var(--gutter) 40px;
  display:grid;grid-template-columns:1.5fr .9fr 1fr 1.3fr;gap:36px;
}
.foot__brand{
  display:inline-flex;align-items:baseline;flex-wrap:wrap;gap:10px;
  font:900 24px/1.1 var(--sans);letter-spacing:-.02em;color:#fff;text-decoration:none;
}
.foot__brandsub{font:500 12px/1 var(--mono);letter-spacing:.12em;color:var(--mint)}
.foot__intro{margin:16px 0 18px;max-width:32em;font-size:15px;line-height:1.8;color:rgba(255,255,255,.7)}
.foot__state{
  display:flex;align-items:center;gap:9px;margin:0;
  font:600 11px/1.4 var(--mono);letter-spacing:.06em;color:var(--mint);
}
.foot__title{
  margin:0 0 16px;padding-bottom:10px;
  font:700 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.5);
  border-bottom:1px solid rgba(255,255,255,.14);
}
.foot__list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot__link{
  color:rgba(255,255,255,.84);font-size:15px;line-height:1.6;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.foot__link:hover{color:var(--mint);border-bottom-color:var(--mint)}
.foot__list--kv{gap:14px}
.foot__k{display:block;font:600 10px/1.4 var(--mono);letter-spacing:.12em;color:rgba(255,255,255,.45)}
.foot__v{display:block;font-size:14px;line-height:1.7;color:#fff;word-break:break-word}

.copybtn{
  margin-top:16px;padding:9px 14px;cursor:pointer;
  background:transparent;color:var(--mint);
  border:1px solid rgba(0,229,168,.5);
  font:600 11px/1 var(--mono);letter-spacing:.08em;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.copybtn:hover{background:rgba(0,229,168,.14)}
.copybtn[data-copied="true"]{background:var(--amber);border-color:var(--amber);color:#1A1F26}

.foot__base{
  max-width:1180px;margin:0 auto;
  padding:20px var(--gutter) 44px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 28px;
  font:500 11px/1.6 var(--mono);letter-spacing:.04em;color:rgba(255,255,255,.55);
}
.foot__base p{margin:0}
.foot__legal{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.foot__base .foot__link{font-size:11px;color:rgba(255,255,255,.62)}
.foot__icp{color:rgba(255,255,255,.42)}

/* ---------- 通用容器与网格 ---------- */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding-inline:var(--gutter)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:20px}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 通用组件 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font:600 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;
  color:var(--navy-3);
}
.kicker::before{content:"";display:block;width:18px;height:2px;background:var(--mint)}

.section{padding-block:clamp(40px,6vw,80px)}
.section--paper2{background:var(--paper-2)}
.section--navy{background:var(--navy);color:rgba(255,255,255,.8)}
.section--navy h2,.section--navy h3{color:#fff}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;
  margin-bottom:28px;padding-bottom:14px;border-bottom:1px solid var(--hair);
}
.section--navy .section__head{border-bottom-color:rgba(255,255,255,.18)}
.section__title{margin:0;font-size:clamp(26px,3.2vw,36px);font-weight:900;letter-spacing:-.02em;line-height:1.15}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 22px;border:1px solid transparent;border-radius:0;cursor:pointer;
  font:700 15px/1 var(--sans);letter-spacing:.01em;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn--primary{background:var(--mint);color:var(--navy);border-color:var(--mint)}
.btn--primary:hover{background:#4bf2c2;border-color:#4bf2c2}
.btn--ghost{background:transparent;color:var(--navy);border-color:var(--navy-3)}
.btn--ghost:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn--amber{background:var(--amber);color:#1A1F26;border-color:var(--amber)}
.btn--amber:hover{background:#ffa163;border-color:#ffa163}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 9px;border:1px solid var(--hair);
  background:var(--paper-2);color:var(--navy-2);
  font:600 11px/1.2 var(--mono);letter-spacing:.06em;text-decoration:none;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.tag--mint{background:rgba(0,229,168,.16);border-color:rgba(0,229,168,.55);color:#04614a}
.tag--amber{background:rgba(255,138,61,.16);border-color:rgba(255,138,61,.6);color:#8a3d05}
.tag--wine{background:var(--wine);border-color:var(--wine);color:#fff}
.tag--violet{background:var(--violet);border-color:var(--violet);color:#fff}
.tag:hover{border-color:var(--navy-3);color:var(--navy)}

.card{
  position:relative;padding:24px;
  background:#fff;border:1px solid var(--hair);
  transition:border-color .16s ease,transform .16s ease;
}
.card:hover{border-color:var(--navy-3)}
.card--accent{border-left:3px solid var(--mint)}
.card--wine{border-left:3px solid var(--wine)}
.card--violet{border-left:3px solid var(--violet)}
.card__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px}
.card__title{margin:0;font-size:20px;font-weight:800;letter-spacing:-.01em;line-height:1.35;color:var(--navy)}
.card__meta{font:600 11px/1.4 var(--mono);letter-spacing:.06em;color:var(--ink-2);white-space:nowrap}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;margin:0 0 20px;padding:0;
  font:600 11px/1.4 var(--mono);letter-spacing:.06em;color:var(--ink-2);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(11,30,58,.3)}
.breadcrumb a{color:var(--ink-2);text-decoration:none}
.breadcrumb a:hover{color:var(--navy);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--mint)}
.breadcrumb [aria-current="page"]{color:var(--navy)}

/* ---------- 图片容器基础规则 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/10;
  background:var(--navy-2);
  border:1px solid var(--hair);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--contain{background:var(--paper-2)}
.media > img,.media > svg,.media > picture > img{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media--contain > img,.media--contain > svg{object-fit:contain}
.media__tag{
  position:absolute;left:0;bottom:0;
  padding:7px 11px;background:var(--navy);color:var(--mint);
  font:600 10px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  body{padding-left:0}
  .site-head{position:sticky;top:0;z-index:70}
  .topbar{
    display:flex;align-items:center;gap:12px;
    height:var(--topbar-h);padding:0 16px;
    background:var(--navy);color:#fff;
    border-bottom:1px solid var(--hair-dark);
  }
  .rail,.rail:hover,.rail:focus-within{
    top:var(--topbar-h);left:0;right:0;bottom:auto;
    width:auto;max-height:calc(100svh - var(--topbar-h));
    border-right:0;border-bottom:1px solid var(--hair-dark);
    box-shadow:0 22px 44px rgba(11,30,58,.42);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .18s ease,transform .2s ease,visibility .2s ease;
  }
  .rail[data-open="true"]{transform:none;opacity:1;visibility:visible;pointer-events:auto}
  .rail .rail__word,.rail:hover .rail__word,.rail:focus-within .rail__word{max-width:240px;opacity:1}
  .rail .rail__short,.rail:hover .rail__short,.rail:focus-within .rail__short{max-width:0;opacity:0}
  .rail__brand{padding:18px 20px}
  .rail__link{width:100%}
  .rail__cta{margin:16px 20px 22px}
  .scroll-meter{top:var(--topbar-h);left:0}
  .foot__inner{grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:900px){
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
  .col-4{grid-column:span 3}
  .col-6{grid-column:span 6}
  .col-8{grid-column:span 6}
}

@media (max-width:620px){
  body{font-size:16px}
  .grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .col-4,.col-6,.col-8,.col-12{grid-column:span 4}
  .foot__inner{grid-template-columns:1fr;gap:30px;padding-top:44px}
  .foot__base{flex-direction:column;align-items:flex-start;gap:12px}
  .card{padding:20px}
}

@media (max-width:430px){
  .topbar__state{display:none}
  .topbar__name{font-size:14px}
}

@media print{
  .rail,.topbar,.scroll-meter,.skip-link,.copybtn{display:none !important}
  body{padding-left:0;background:#fff;color:#000;font-size:12pt}
  .site-foot{background:#fff;color:#000;border-top:1px solid #000}
  .foot__signal{display:none}
  .foot__link,.foot__v,.foot__intro{color:#000}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .rail:hover,.rail:focus-within{transition:none}
}