/* ============ 1. 设计令牌 ============ */
:root{
  --ink:#06110F;
  --ink-2:#0C1F1B;
  --ink-3:#12332C;
  --paper:#EAF4EF;
  --cyan:#2BF5C8;
  --orange:#FF6A2B;
  --amber:#F2C14E;
  --muted:#93B3A9;
  --wine:#7E1F3D;
  --indigo:#241A4A;
  --line:#3C5A52;

  --rail-w:108px;
  --bar-h:68px;

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --u:8px;
}

/* ============ 2. Reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:repeating-linear-gradient(118deg,rgba(43,245,200,.045) 0 1px,transparent 1px 9px);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
hr{border:0;border-top:1px solid var(--line);margin:0}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:1px;
}

/* ============ 3. 中文排版 ============ */
h1,h2,h3,h4,.display{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  font-stretch:condensed;
  text-wrap:balance;
}
h1{font-size:clamp(30px,5vw,54px)}
h2{font-size:clamp(24px,3.2vw,36px)}
h3{font-size:clamp(19px,2.2vw,24px)}
p{text-wrap:pretty}
strong{font-weight:900}
.num,.score{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

/* ============ 4. 跳转与外壳 ============ */
.skip-link{
  position:absolute;
  left:12px;
  top:-100px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-display);
  font-weight:900;
  font-size:14px;
  text-decoration:none;
  border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.site-header{position:relative;z-index:60}

/* ============ 5. 顶部信号条 ============ */
.header-bar{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  gap:clamp(12px,2.4vw,32px);
  min-height:var(--bar-h);
  padding:10px clamp(16px,3vw,44px);
  background:var(--ink-2);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(43,245,200,.16);
}
.header-brand{display:flex;align-items:center;gap:14px;flex:1 1 auto;min-width:0}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;color:var(--paper);
}
.brand-mark{
  width:14px;height:14px;flex:none;
  background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 100%,56% 100%,56% 44%,0 44%);
  transition:transform .3s var(--ease);
}
.brand:hover .brand-mark{transform:rotate(90deg)}
.brand-text{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:.02em;
  white-space:nowrap;
}
.header-tagline{
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.header-signal{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
  padding:4px 16px;
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
}
.signal-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--muted);
  white-space:nowrap;
}
.signal-num{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  line-height:1;
  color:var(--amber);
  font-variant-numeric:tabular-nums;
}
.signal-dot{
  width:6px;height:6px;flex:none;
  background:var(--cyan);
  border-radius:50%;
  animation:signal-pulse 2.4s var(--ease) infinite;
}
@keyframes signal-pulse{
  0%{box-shadow:0 0 0 0 rgba(43,245,200,.55)}
  70%{box-shadow:0 0 0 8px rgba(43,245,200,0)}
  100%{box-shadow:0 0 0 0 rgba(43,245,200,0)}
}
.header-actions{display:flex;align-items:center;gap:10px;flex:none}

/* 滚动进度 */
.scroll-meter{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
  pointer-events:none;
}

/* ============ 6. 按钮 ============ */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid transparent;
  border-radius:2px;
  background:none;
  color:var(--paper);
  font-family:var(--font-display);
  font-weight:900;
  font-size:14px;
  letter-spacing:.03em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  overflow:hidden;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,transparent 0 42%,rgba(234,244,239,.42) 50%,transparent 58% 100%);
  transform:translateX(-130%);
  pointer-events:none;
}
.btn:hover::after{transform:translateX(130%);transition:transform .4s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn-signal{
  background:var(--orange);
  color:#120702;
  border-color:var(--orange);
}
.btn-signal:hover{background:#FF8348;border-color:#FF8348}
.btn-outline{
  background:transparent;
  color:var(--cyan);
  border-color:var(--cyan);
}
.btn-outline:hover{background:rgba(43,245,200,.12);color:var(--cyan)}
.btn-ghost{
  background:transparent;
  color:var(--paper);
  border-color:var(--line);
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ============ 7. 侧边轨道导航 ============ */
.rail-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  padding:22px 0 18px;
  background:var(--ink);
  border-right:1px solid var(--line);
  overflow-y:auto;
  overscroll-behavior:contain;
  z-index:70;
}
.rail-caption{
  margin:0 0 14px;
  padding:0 14px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  line-height:1.5;
  color:var(--muted);
}
.rail-caption::before{
  content:"";
  display:block;
  width:26px;height:2px;
  margin-bottom:10px;
  background:var(--cyan);
}
.rail-list{display:flex;flex-direction:column;gap:2px}
.rail-link{
  display:grid;
  gap:3px;
  padding:12px 10px 12px 14px;
  border-left:2px solid transparent;
  color:var(--muted);
  text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.rail-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--line);
  transition:color .2s var(--ease);
}
.rail-label{
  font-family:var(--font-display);
  font-weight:900;
  font-size:13px;
  letter-spacing:.02em;
  line-height:1.35;
}
.rail-link:hover{background:var(--ink-2);color:var(--paper);border-left-color:var(--line)}
.rail-link:hover .rail-index{color:var(--cyan)}
.rail-link[aria-current="page"]{
  color:var(--paper);
  border-left-color:var(--cyan);
  background:linear-gradient(90deg,rgba(43,245,200,.16),rgba(43,245,200,0));
}
.rail-link[aria-current="page"] .rail-index{color:var(--cyan)}
.rail-cta{display:none;margin:18px 12px 0;font-size:13px;padding:9px 10px}
.rail-note{
  margin-top:auto;
  padding:18px 14px 0;
  font-size:11px;
  line-height:1.6;
  letter-spacing:.06em;
  color:var(--muted);
  border-top:1px solid var(--line);
}

/* 移动端开关与遮罩 */
.nav-toggle{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  width:46px;height:42px;
  padding:0;
  background:var(--ink-3);
  border:1px solid var(--line);
  border-radius:2px;
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-bar{
  display:block;
  width:20px;height:2px;
  background:var(--cyan);
  transition:transform .24s var(--ease),opacity .18s var(--ease);
}
.site-header[data-nav-open] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-nav-open] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-nav-open] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-scrim{
  position:fixed;
  inset:0;
  background:rgba(6,17,15,.74);
  opacity:0;
  pointer-events:none;
  transition:opacity .28s var(--ease);
  z-index:65;
}
.site-header[data-nav-open] .nav-scrim{opacity:1;pointer-events:auto}

/* ============ 8. 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,112px);
  background:var(--ink-2);
  border-top:2px solid var(--cyan);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.55fr);
  gap:clamp(32px,5vw,72px);
  padding:clamp(40px,6vw,72px) clamp(20px,4vw,64px);
  border-bottom:1px solid var(--line);
}
.footer-brand-block{min-width:0}
.footer-kicker{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  color:var(--cyan);
  margin-bottom:12px;
}
.footer-wordmark{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1;
  letter-spacing:-.02em;
  margin-bottom:16px;
  color:var(--paper);
}
.footer-summary{
  font-size:14.5px;
  line-height:1.8;
  color:var(--muted);
  max-width:34ch;
}
.footer-round{display:flex;align-items:baseline;gap:10px;margin-top:22px}
.round-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--muted);
}
.round-value{
  font-family:var(--font-mono);
  font-size:clamp(24px,3vw,32px);
  font-weight:700;
  line-height:1;
  color:var(--amber);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.footer-group{min-width:0}
.footer-group-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-bottom:10px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line);
}
.footer-links{display:flex;flex-direction:column;gap:2px}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:14px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--paper);border-bottom-color:var(--cyan)}
.footer-contact{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(18px,3vw,52px);
  padding:clamp(20px,3vw,30px) clamp(20px,4vw,64px);
  background:var(--wine);
  border-top:1px solid rgba(234,244,239,.16);
}
.contact-item{display:flex;flex-direction:column;gap:3px;min-width:0}
.contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:rgba(234,244,239,.74);
}
.contact-value{
  font-size:14.5px;
  line-height:1.6;
  color:var(--paper);
  overflow-wrap:anywhere;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  padding:18px clamp(20px,4vw,64px);
  background:var(--ink);
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
}
.footer-law{margin:0}
.footer-year{color:var(--paper)}

/* ============ 9. 通用版式与组件 ============ */
.wrap{
  width:100%;
  max-width:1180px;
  margin-inline:auto;
  padding-inline:clamp(16px,3.2vw,48px);
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}

.rule{height:1px;background:var(--line);border:0;margin:clamp(24px,4vw,48px) 0}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-bottom:12px;
}
.kicker::before{content:"";width:22px;height:1px;background:var(--cyan)}
.label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.5;
  color:var(--muted);
}
.lede{
  font-size:clamp(16px,1.6vw,18px);
  line-height:1.8;
  color:var(--muted);
  max-width:62ch;
}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--ink-3);
  border:1px solid var(--line);
  border-radius:2px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.panel::before{
  content:"";
  position:absolute;
  top:-1px;left:-1px;
  width:36px;height:2px;
  background:var(--cyan);
}
.panel:hover{border-color:rgba(43,245,200,.42);background:#143930}
.panel-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(17px,1.9vw,20px);
  letter-spacing:-.01em;
  line-height:1.3;
  margin-bottom:8px;
}
.panel-meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}

.tag{
  display:inline-block;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  line-height:1.6;
  color:var(--cyan);
  background:rgba(43,245,200,.1);
  border:1px solid rgba(43,245,200,.4);
  border-radius:1px;
}

.vnote{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.3em;
  color:var(--muted);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
  padding:18px 0;
}
.breadcrumb a{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb > span:last-child{color:var(--paper)}

/* 图片容器（页面阶段放置占位） */
.media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background-color:var(--ink-2);
  background-image:repeating-linear-gradient(118deg,rgba(43,245,200,.09) 0 1px,transparent 1px 10px);
  border:1px solid var(--line);
  border-radius:2px;
}
.media-img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.08) brightness(.82);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(43,245,200,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(43,245,200,.16) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.45;
  mix-blend-mode:screen;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media-tag{
  position:absolute;
  top:0;left:0;
  z-index:2;
  padding:4px 10px;
  background:var(--ink);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.media-caption{
  margin-top:10px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
}

/* 分段切换 */
.segmented{display:block}
.seg-tabs{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  border-bottom:1px solid var(--line);
  margin-bottom:clamp(16px,2.4vw,28px);
}
.seg-tab{
  position:relative;
  padding:10px 16px;
  background:none;
  border:0;
  border-radius:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--muted);
  cursor:pointer;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.seg-tab:hover{color:var(--paper);background:var(--ink-2)}
.seg-tab::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .24s var(--ease);
}
.seg-tab[aria-selected="true"]{color:var(--paper)}
.seg-tab[aria-selected="true"]::after{transform:scaleX(1)}
.seg-panel{display:block}
.seg-panel[hidden]{display:none}

/* 显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ============ 10. 桌面 / 平板 / 手机 ============ */
@media (min-width:900px){
  body{padding-left:var(--rail-w)}
  .nav-toggle,.nav-scrim{display:none}
}

@media (max-width:899px){
  .header-bar{padding:8px 14px;gap:10px;min-height:60px}
  .header-tagline{display:none}
  .rail-nav{
    top:auto;
    left:0;right:0;bottom:0;
    width:auto;
    max-height:82dvh;
    padding:18px 16px calc(20px + env(safe-area-inset-bottom));
    border-right:0;
    border-top:2px solid var(--cyan);
    transform:translateY(101%);
    transition:transform .32s var(--ease);
    z-index:70;
  }
  .rail-nav[data-open]{transform:translateY(0)}
  .rail-caption{margin-bottom:12px;padding:0}
  .rail-list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:8px;
  }
  .rail-link{
    padding:14px 12px;
    border-left:2px solid transparent;
    border-bottom:1px solid var(--line);
    background:var(--ink-2);
  }
  .rail-link[aria-current="page"]{background:rgba(43,245,200,.14)}
  .rail-cta{display:inline-flex;margin:16px 0 0;width:100%}
  .rail-note{margin-top:16px;padding:14px 0 0}

  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-summary{max-width:none}
}

@media (max-width:640px){
  body{font-size:16px}
  .header-signal{display:none}
  .header-actions .btn-signal{display:none}
  .header-actions{gap:0}
  .footer-nav{grid-template-columns:minmax(0,1fr)}
  .footer-group-title{font-size:10.5px}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

@media (min-width:641px) and (max-width:899px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ============ 11. 动效降级 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .btn::after{display:none}
  [data-reveal]{opacity:1;transform:none}
  .signal-dot{animation:none;box-shadow:none}
}