/* =========================================================
   威哥入口 · /assets/site.css
   共享外壳：reset / tokens / 中文排版 / 刊头 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html:focus-within{scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{background:none;border:0;font:inherit;color:inherit;cursor:pointer}
img,svg,video,canvas{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0B0D0E;
  --ink-2:#15191C;
  --ink-3:#232A2F;
  --silver:#C3CACE;
  --mist:#F4F7F7;
  --cyan:#16E0D0;
  --red:#C61B3C;
  --teal:#0E2A2A;
  --indigo:#221A3A;
  --wine:#3A1420;
  --slate:#5E8E8B;

  --grid-line:rgba(35,42,47,.92);
  --hair:rgba(94,142,139,.28);
  --cyan-soft:rgba(22,224,208,.42);

  --shell:1240px;
  --step:80px;
  --radius:2px;
  --gutter:clamp(16px,4vw,48px);

  --font-cn:"Source Han Sans SC","Noto Sans SC","Alibaba PuHuiTi 3.0","Alibaba PuHuiTi","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-narrow:"Archivo Narrow","Oswald","Arial Narrow","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. 底盘 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,var(--grid-line) 1px,transparent 1px),
    linear-gradient(to bottom,var(--grid-line) 1px,transparent 1px);
  background-size:var(--step) var(--step);
  color:var(--silver);
  font-family:var(--font-cn);
  font-size:clamp(16px,.32vw + 15px,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
#main-content{display:block;scroll-margin-top:140px}

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

/* ---------- 4. 排版 ---------- */
.display,.h1,.h2,.h3,.h4{
  font-family:var(--font-cn);
  font-weight:900;
  color:var(--mist);
  letter-spacing:-.02em;
  line-height:1.06;
}
.display{font-size:clamp(46px,12vw,168px);line-height:.9;letter-spacing:-.035em}
.h1{font-size:clamp(34px,5.4vw,64px);line-height:1.02}
.h2{font-size:clamp(28px,3.8vw,52px);line-height:1.08}
.h3{font-size:clamp(20px,1.8vw,28px);line-height:1.2;letter-spacing:-.01em}
.h4{font-size:clamp(17px,1.3vw,20px);line-height:1.35}

.h-en{
  font-family:var(--font-narrow);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.14em;
  line-height:.95;
  color:var(--mist);
}
.mono{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--slate);
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-narrow);
  font-size:12px;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{
  max-width:52ch;
  font-size:clamp(17px,1.4vw,21px);
  line-height:1.65;
  color:var(--silver);
}
.prose{
  max-width:68ch;
  font-size:clamp(16px,1.1vw,18px);
  line-height:1.75;
  color:var(--silver);
}
.prose > * + *{margin-top:1.15em}
.prose h2,.prose h3{margin-top:1.8em;color:var(--mist)}
.prose strong{color:var(--mist);font-weight:700}
.prose a{color:var(--cyan);border-bottom:1px solid var(--cyan-soft)}
.prose ul,.prose ol{padding-left:1.2em}
.prose ul li{list-style:none;position:relative}
.prose ul li::before{content:"—";position:absolute;left:-1.2em;color:var(--slate)}
.prose ol{counter-reset:prose}
.prose ol li{list-style:decimal;color:var(--silver)}

/* ---------- 5. 布局工具 ---------- */
.shell{width:min(var(--shell),92vw);margin-inline:auto}
.shell--narrow{width:min(880px,92vw);margin-inline:auto}
.section{padding-block:clamp(56px,8vw,120px)}
.section--teal{background:var(--teal)}
.section--indigo{background:var(--indigo)}
.section--wine{background:var(--wine)}
.rule{height:1px;border:0;background:var(--ink-3)}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 6. 基础组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  padding:.85em 1.7em;
  border:1px solid var(--cyan);
  border-radius:var(--radius);
  color:var(--cyan);
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:13px;
  letter-spacing:.18em;
  text-transform:uppercase;
  line-height:1;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{background:var(--cyan);color:var(--ink);transform:translateY(-2px)}
.btn--ghost{border-color:var(--hair);color:var(--silver)}
.btn--ghost:hover{background:transparent;border-color:var(--mist);color:var(--mist)}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--slate);
}
.crumbs li{display:inline-flex;align-items:center;gap:12px}
.crumbs li + li::before{content:"/";color:var(--ink-3)}
.crumbs a{color:var(--silver)}
.crumbs a:hover{color:var(--cyan)}

.panel{
  padding:clamp(20px,3vw,36px);
  border:1px solid var(--ink-3);
  border-radius:var(--radius);
  background:var(--ink-2);
}
.panel > * + *{margin-top:1em}

.dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--cyan);
  vertical-align:middle;
}
.dot--red{background:var(--red)}
.dot--slate{background:var(--slate)}

/* 图片容器基础规则（页面阶段放置图片占位） */
.frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--ink-3);
  border-radius:var(--radius);
  background:var(--ink-2);
}
.frame::before{content:"";display:block;padding-top:56.25%}
.frame > *{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.frame--wide::before{padding-top:42%}
.frame--3x4::before{padding-top:133.33%}
.frame--1x1::before{padding-top:100%}

/* ---------- 7. 显现协议 ---------- */
html[data-js="on"] [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
  will-change:opacity,transform;
}
html[data-js="on"] [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 8. 滚动进度 ---------- */
.scroll-rail{
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  z-index:120;
  pointer-events:none;
  display:none;
}
html[data-js="on"] .scroll-rail{display:block}
.scroll-rail__bar{
  display:block;
  width:100%;height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--red));
}

/* ---------- 9. 刊头 ---------- */
.wg-masthead{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(11,13,14,.94);
  border-bottom:1px solid var(--ink-3);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.wg-masthead[data-open="true"]{background:var(--ink-2)}
.wg-masthead__inner{
  width:min(var(--shell),92vw);
  margin-inline:auto;
  padding:clamp(14px,2vw,24px) 0 0;
}
.wg-masthead__top{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  padding-bottom:clamp(12px,1.6vw,18px);
}
.wg-masthead__top::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan) 14%,var(--cyan) 86%,transparent);
  opacity:.62;
}
.wg-masthead__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  text-align:center;
}
.wg-masthead__name{
  font-family:var(--font-cn);
  font-weight:900;
  font-size:clamp(24px,3.2vw,40px);
  letter-spacing:-.02em;
  line-height:1;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.wg-masthead__name:hover{color:var(--cyan)}
.wg-masthead__meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:baseline;
  gap:6px 16px;
}
.wg-masthead__cn{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--slate);
}
.wg-masthead__tagline{
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  line-height:.95;
  color:var(--silver);
}

.skip-link{
  position:absolute;
  left:12px;
  top:-64px;
  z-index:140;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink);
  border-radius:var(--radius);
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

.nav-toggle{
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  border:1px solid var(--ink-3);
  border-radius:var(--radius);
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--silver);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--mist)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.wg-masthead[data-open="true"] .nav-toggle__bars{background:transparent}
.wg-masthead[data-open="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.wg-masthead[data-open="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.wg-nav{display:block}
.wg-nav__list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:stretch;
}
.wg-nav__item{border-left:1px solid var(--ink-3)}
.wg-nav__item:last-child{border-right:1px solid var(--ink-3)}
.wg-nav__link{
  position:relative;
  display:block;
  padding:15px 22px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--silver);
  transition:color .18s var(--ease);
}
.wg-nav__link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:9px;
  width:0;height:2px;
  background:var(--cyan);
  transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.wg-nav__link:hover{color:var(--mist)}
.wg-nav__link:hover::after{width:20px}
.wg-nav__link[aria-current="page"]{color:var(--mist)}
.wg-nav__link[aria-current="page"]::after{width:20px;background:var(--cyan)}

/* ---------- 10. 页脚 ---------- */
.wg-foot{
  position:relative;
  margin-top:clamp(72px,10vw,160px);
  background:var(--ink-2);
  border-top:1px solid var(--ink-3);
}
.wg-foot::before{
  content:"";
  position:absolute;
  left:0;top:0;
  width:min(320px,42vw);
  height:2px;
  background:var(--cyan);
}
.wg-foot__inner{
  width:min(var(--shell),92vw);
  margin-inline:auto;
  padding:clamp(40px,6vw,76px) 0 30px;
}
.wg-foot__grid{
  display:grid;
  grid-template-columns:1.5fr repeat(4,minmax(0,1fr));
  gap:clamp(24px,3vw,44px);
}
.wg-foot__mark{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--cyan);
}
.wg-foot__name{
  margin-top:12px;
  font-family:var(--font-cn);
  font-weight:900;
  font-size:clamp(26px,3vw,38px);
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--mist);
}
.wg-foot__tagline{
  margin-top:10px;
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  line-height:.95;
  color:var(--slate);
  max-width:22ch;
}
.foot-col__title{
  padding-bottom:12px;
  margin-bottom:16px;
  border-bottom:1px solid var(--ink-3);
  font-family:var(--font-narrow);
  font-weight:700;
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.foot-col__list{display:flex;flex-direction:column;gap:10px}
.foot-col__link{
  display:inline-block;
  font-size:14.5px;
  color:var(--silver);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.foot-col__link:hover{color:var(--mist);transform:translateX(4px)}
.wg-foot__contact{
  margin-top:clamp(32px,4vw,56px);
  padding-top:22px;
  border-top:1px solid var(--ink-3);
  max-width:90ch;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  line-height:1.9;
  color:var(--slate);
}
.wg-foot__legal{
  display:flex;
  flex-wrap:wrap;
  gap:6px 24px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate);
}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1080px){
  .wg-foot__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .wg-foot__brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .wg-nav{display:none;padding-bottom:10px}
  .wg-masthead[data-open="true"] .wg-nav{display:block}
  .wg-nav__list{flex-direction:column;justify-content:flex-start;align-items:stretch}
  .wg-nav__item,
  .wg-nav__item:last-child{border-left:0;border-right:0;border-top:1px solid var(--ink-3)}
  .wg-nav__item:last-child{border-bottom:1px solid var(--ink-3)}
  .wg-nav__link{padding:15px 4px;font-size:16px}
  .wg-nav__link::after{left:4px;bottom:8px;transform:none}
  .wg-nav__link:hover::after,
  .wg-nav__link[aria-current="page"]::after{width:24px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:720px){
  .wg-masthead__meta{gap:4px 12px}
  .wg-masthead__name{font-size:clamp(22px,6vw,30px)}
  .wg-foot__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .wg-foot__legal{flex-direction:column;gap:6px}
}
@media (max-width:460px){
  .wg-masthead__cn{display:none}
}

/* ---------- 12. 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.12s !important;
    transition-delay:0ms !important;
  }
  html[data-js="on"] [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .foot-col__link:hover{transform:none}
}