/* ==========================================================================
   302com 中心 · 坐标主场 Site Kit  (/assets/site.css)
   共享：reset / 变量 / 中文排版 / 头部 / 页脚 / 按钮 / 面包屑 / 网格 / 基础组件
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --paper:#F4EDDF;
  --ink:#15142A;
  --teal:#12707F;
  --mist:#CFE3E6;
  --purple:#4E3A73;
  --amber:#DFA02B;
  --amber-pale:#F7E4BC;
  --survey:#8B879B;
  --deep:#0A3E48;

  --f-display:"Archivo Narrow","Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --f-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --f-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --border:2px solid var(--ink);
  --border-strong:3px solid var(--ink);
  --shadow-hard:6px 6px 0 var(--ink);
  --shadow-hard-sm:4px 4px 0 var(--ink);
  --shadow-deep:6px 6px 0 var(--deep);

  --gutter:clamp(16px,4vw,48px);
  --gap:24px;
  --row:8px;
  --shell:1240px;
  --header-h:auto;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse}
a{color:var(--teal)}
::selection{background:var(--amber);color:var(--ink)}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  background-color:var(--paper);
  background-image:
    linear-gradient(to right,rgba(21,20,42,.045) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(21,20,42,.045) 1px,transparent 1px);
  background-size:88px 88px;
  color:var(--ink);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--f-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  text-wrap:balance;
}
p{max-width:38em}
p + p{margin-top:1.5em}

.type-display{
  font-family:var(--f-display);
  font-weight:800;
  font-size:clamp(40px,7vw,104px);
  line-height:.92;
  letter-spacing:-.02em;
}
.type-display--sm{font-size:clamp(30px,4.4vw,60px);line-height:1.02}
.type-sub{font-size:clamp(18px,2vw,22px);font-family:var(--f-display);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.lede{
  font-family:var(--f-serif);
  font-size:clamp(17px,1.8vw,20px);
  line-height:1.9;
  color:var(--deep);
  max-width:34em;
}
.type-quote{
  font-family:var(--f-serif);
  font-size:clamp(18px,2.2vw,24px);
  line-height:1.75;
  border-left:3px solid var(--amber);
  padding-left:20px;
  max-width:32em;
}
.eyebrow{
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--teal);
  font-weight:500;
}
.mono{
  font-family:var(--f-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  white-space:nowrap;
}
.note{
  font-family:var(--f-mono);
  font-size:13px;
  line-height:1.7;
  letter-spacing:.03em;
  color:var(--survey);
}
strong{font-weight:700}

/* ---------- 4. 焦点与跳转 ---------- */
:focus-visible{outline:3px solid var(--teal);outline-offset:3px}
.site-footer :focus-visible{outline-color:var(--amber-pale)}
.skip-link{
  position:absolute;top:-120px;left:16px;z-index:300;
  padding:10px 18px;
  background:var(--ink);color:var(--paper);
  font-family:var(--f-mono);font-size:13px;letter-spacing:.08em;
  text-decoration:none;border:2px solid var(--amber);
}
.skip-link:focus{top:12px}

/* ---------- 5. 容器与网格 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section + .section{padding-top:clamp(40px,6vw,80px)}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 20px;margin-bottom:clamp(24px,3.4vw,40px)}
.section-num{
  font-family:var(--f-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(44px,6vw,88px);
  line-height:.86;
  font-weight:700;
  color:var(--teal);
  letter-spacing:-.02em;
  transition:color .2s ease;
}
.section.is-active .section-num{color:var(--amber)}
.tick-rule{
  height:9px;
  border-top:1px solid var(--survey);
  background-image:repeating-linear-gradient(to right,var(--survey) 0 1px,transparent 1px 14px);
  background-repeat:repeat-x;
  background-size:auto 6px;
  background-position:left top;
  opacity:.85;
}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.col-note{grid-column:1 / 4}
.col-main{grid-column:4 / 11}
.col-mark{grid-column:11 / 13}
.layout-editorial{
  display:grid;
  grid-template-columns:minmax(0,3fr) minmax(0,7fr) minmax(0,2fr);
  gap:clamp(20px,3vw,40px);
  align-items:start;
}
.stack{display:flex;flex-direction:column;gap:clamp(16px,2vw,28px)}
.stack--tight{gap:10px}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.cluster--wide{gap:20px 32px}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 22px;
  font-family:var(--f-body);font-size:15px;font-weight:700;line-height:1.25;
  color:var(--ink);background:var(--paper);
  border:var(--border);border-radius:0;
  box-shadow:var(--shadow-hard-sm);
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:var(--shadow-hard)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn--primary{background:var(--amber);color:var(--ink)}
.btn--primary:hover{background:var(--amber-pale)}
.btn--dark{background:var(--deep);color:var(--paper)}
.btn--dark:hover{background:var(--purple)}
.btn--ghost{background:transparent;box-shadow:none}
.btn--ghost:hover{background:var(--mist);transform:none;box-shadow:none}

/* ---------- 7. 标签 / 卡片 / 装饰 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  font-family:var(--f-mono);font-size:12px;letter-spacing:.06em;
  color:var(--ink);background:var(--mist);
  border:1px solid var(--ink);
  white-space:nowrap;
}
.tag--amber{background:var(--amber-pale);border-color:var(--ink)}
.tag--purple{background:var(--purple);color:var(--paper);border-color:var(--deep)}

.panel{
  background:var(--paper);
  border:var(--border);
  box-shadow:var(--shadow-hard);
  padding:clamp(18px,2.4vw,30px);
}
.panel--mist{background:var(--mist)}
.panel--ink{background:var(--ink);color:var(--paper);box-shadow:var(--shadow-deep)}
.panel--ink a{color:var(--amber-pale)}

.crosshair{
  position:relative;
  width:22px;height:22px;
  background:
    linear-gradient(var(--amber),var(--amber)) center/1px 100% no-repeat,
    linear-gradient(var(--amber),var(--amber)) center/100% 1px no-repeat;
}
.crosshair::after{
  content:"";position:absolute;inset:calc(50% - 3px);
  border:1px solid var(--amber);border-radius:50%;
}

.coord-readout{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-mono);font-size:12px;letter-spacing:.12em;
  color:var(--deep);
  border:1px solid var(--survey);
  background:var(--amber-pale);
  padding:4px 12px;
  font-variant-numeric:tabular-nums;
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs{
  padding-block:14px;
  border-bottom:1px solid rgba(139,135,155,.5);
}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:12px;letter-spacing:.05em;
  color:var(--survey);
}
.breadcrumbs__link{color:var(--teal);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumbs__link:hover{border-bottom-color:var(--teal)}
.breadcrumbs__sep{color:var(--survey)}
.breadcrumbs__item[aria-current="page"]{color:var(--deep)}

/* ---------- 9. 图片容器（页面阶段使用） ---------- */
.figure{display:flex;flex-direction:column;gap:10px;margin:0}
.figure__frame{
  position:relative;overflow:hidden;
  border:var(--border);
  box-shadow:var(--shadow-hard);
  background:var(--mist);
}
.figure__frame::after{
  content:"";position:absolute;top:50%;left:50%;
  width:22px;height:22px;transform:translate(-50%,-50%);
  pointer-events:none;opacity:.9;
  background:
    linear-gradient(var(--amber),var(--amber)) center/1px 100% no-repeat,
    linear-gradient(var(--amber),var(--amber)) center/100% 1px no-repeat;
}
.figure__img{
  width:100%;height:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
}
.figure--wide .figure__img{aspect-ratio:21 / 9}
.figure--tall .figure__img{aspect-ratio:3 / 4}
.figure--square .figure__img{aspect-ratio:1 / 1}
.figure__caption{font-family:var(--f-mono);font-size:12px;letter-spacing:.04em;color:var(--survey)}

.map-plate{
  position:relative;
  aspect-ratio:16 / 9;
  width:100%;
  border:var(--border);
  box-shadow:var(--shadow-hard);
  background-color:var(--mist);
  background-image:
    radial-gradient(120% 90% at 18% 22%,rgba(18,112,127,.45) 0 28%,transparent 58%),
    radial-gradient(80% 70% at 78% 68%,rgba(78,58,115,.35) 0 24%,transparent 62%),
    repeating-linear-gradient(to right,rgba(21,20,42,.14) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(to bottom,rgba(21,20,42,.14) 0 1px,transparent 1px 40px);
  background-blend-mode:multiply,multiply,normal,normal;
}
.map-plate--tall{aspect-ratio:3 / 4}

/* ---------- 10. 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:var(--border-strong);
}
.site-header__inner{
  position:relative;
  max-width:1320px;margin-inline:auto;
  padding:clamp(14px,2vw,22px) var(--gutter) 26px;
  display:flex;flex-wrap:wrap;align-items:flex-end;
  gap:14px clamp(18px,3vw,44px);
  justify-content:space-between;
}
.site-header__rule{
  position:absolute;left:var(--gutter);right:var(--gutter);bottom:8px;
  height:9px;pointer-events:none;
  border-bottom:1px solid rgba(139,135,155,.55);
  background-image:repeating-linear-gradient(to right,rgba(139,135,155,.8) 0 1px,transparent 1px 14px);
  background-repeat:repeat-x;
  background-size:auto 6px;
  background-position:left bottom;
  opacity:.75;
}
.header-progress{
  position:absolute;left:0;right:0;bottom:-3px;height:3px;
  background:var(--amber);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
  z-index:2;
}

/* 品牌 */
.brand{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__link{display:flex;flex-direction:column;gap:2px;text-decoration:none;color:var(--ink)}
.brand__name{
  font-family:var(--f-display);font-size:clamp(22px,2.4vw,28px);
  font-weight:800;line-height:1.08;letter-spacing:-.01em;
}
.brand__tagline{
  font-family:var(--f-serif);font-size:12px;letter-spacing:.16em;
  color:var(--deep);
}
.brand__index{
  display:flex;align-items:center;gap:8px;margin-top:6px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;color:var(--survey);
}
.brand__index-label{padding:1px 6px;border:1px solid var(--survey);color:var(--deep)}
.brand__index-value{color:var(--teal);font-variant-numeric:tabular-nums;white-space:nowrap}

/* 导航 */
.site-nav{margin-left:auto;display:flex;align-items:center}
.site-nav__list{display:flex;align-items:center;gap:clamp(8px,1.6vw,26px)}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 2px;
  font-size:15px;font-weight:500;color:var(--ink);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.site-nav__link::before{
  content:"";width:6px;height:6px;border-radius:50%;
  border:1px solid var(--survey);background:transparent;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease;
}
.site-nav__num{font-family:var(--f-mono);font-size:11px;color:var(--survey);letter-spacing:0}
.site-nav__link:hover{color:var(--deep);border-bottom-color:var(--teal)}
.site-nav__link:hover::before{transform:translateY(-2px);border-color:var(--teal)}
.site-nav__link[aria-current="page"]{color:var(--deep);font-weight:800;border-bottom-color:var(--amber)}
.site-nav__link[aria-current="page"]::before{background:var(--amber);border-color:var(--deep)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--amber);font-weight:700}

/* 行动按钮 */
.site-header__cta{flex:0 0 auto;padding:11px 20px;font-size:14px}

/* 移动导航按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  min-height:44px;padding:9px 14px;
  border:var(--border);background:var(--paper);color:var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.12em;
  cursor:pointer;
}
.nav-toggle__bars{display:grid;gap:5px;width:18px}
.nav-toggle__bar{
  display:block;height:2px;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.site-header[data-open] .nav-toggle__bar:first-child{transform:translateY(3.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--purple);
  color:var(--paper);
  border-top:var(--border-strong);
}
.site-footer::before{
  content:"";display:block;height:10px;
  border-bottom:1px solid rgba(244,237,223,.25);
  background-image:repeating-linear-gradient(to right,rgba(244,237,223,.45) 0 1px,transparent 1px 16px);
}
.site-footer__inner{
  max-width:1320px;margin-inline:auto;
  padding:clamp(36px,5vw,64px) var(--gutter) clamp(28px,4vw,44px);
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.7fr;
  gap:clamp(24px,3vw,44px);
  align-items:start;
}
.footer-brand__name{
  font-family:var(--f-display);font-size:clamp(24px,2.6vw,32px);
  font-weight:800;line-height:1.1;letter-spacing:-.01em;color:var(--paper);
}
.footer-brand__signature{
  font-family:var(--f-serif);font-size:13px;letter-spacing:.14em;
  color:var(--amber-pale);margin-top:8px;
}
.footer-brand__coords{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(244,237,223,.62);margin-top:14px;white-space:nowrap;
}
.footer-col__title{
  font-family:var(--f-mono);font-size:12px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--amber-pale);
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(244,237,223,.28);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px}
.footer-link{
  display:inline-block;
  color:var(--paper);font-size:15px;line-height:1.6;
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--amber-pale);border-bottom-color:var(--amber)}
.footer-contact__list{display:flex;flex-direction:column;gap:9px;margin:0}
.footer-contact__row{display:grid;grid-template-columns:3.2em 1fr;gap:10px;align-items:baseline}
.footer-contact__key{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(244,237,223,.6);
}
.footer-contact__value{
  font-size:14px;line-height:1.65;color:var(--paper);
  overflow-wrap:anywhere;
}
.footer-contact__value--mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.footer-contact__note{
  margin-top:14px;max-width:32em;
  font-size:12px;line-height:1.75;
  color:rgba(244,237,223,.66);
}
.site-footer__base{
  max-width:1320px;margin-inline:auto;
  padding:16px var(--gutter) 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;
  border-top:1px solid rgba(244,237,223,.28);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.04em;
  color:rgba(244,237,223,.72);
}
.site-footer__legal{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer-legal-link{
  color:rgba(244,237,223,.82);text-decoration:none;
  border-bottom:1px solid transparent;
}
.footer-legal-link:hover{color:var(--amber-pale);border-bottom-color:var(--amber)}
.footer-icp,.footer-copy{white-space:nowrap}

/* ---------- 12. 显现动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-revealed{opacity:1;transform:none}

/* ---------- 13. 响应式：平板 ---------- */
@media (max-width:1080px){
  .site-footer__inner{grid-template-columns:1.4fr 1fr 1fr;gap:28px 32px}
  .footer-contact{grid-column:1 / -1}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-note{grid-column:1 / 3}
  .col-main{grid-column:1 / -1;order:2}
  .col-mark{grid-column:5 / 7;order:1}
  .layout-editorial{grid-template-columns:minmax(0,1fr);}
}

/* ---------- 14. 响应式：移动 ---------- */
@media (max-width:900px){
  body{font-size:16px;background-size:64px 64px}
  .nav-toggle{display:inline-flex}
  .site-header__inner{align-items:center;row-gap:12px;padding-bottom:20px}
  .site-header__cta{order:3;margin-left:auto;font-size:13px;padding:10px 14px}
  .brand{order:1;flex:1 1 auto}
  .nav-toggle{order:2}
  .site-nav{
    order:4;flex:1 0 100%;
    display:none;
    margin-left:0;
    padding-top:12px;
    border-top:var(--border);
    overflow-x:auto;overflow-y:hidden;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{flex-wrap:nowrap;gap:22px;width:max-content;padding-bottom:4px}
  .site-nav__link{min-height:44px;font-size:15px;white-space:nowrap}
  .site-nav__link[aria-current="page"]{border-bottom-width:3px}
  .site-header__rule{left:var(--gutter);right:var(--gutter);bottom:6px}
  .type-display{font-size:clamp(34px,9vw,64px)}
  .site-footer__inner{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
  .site-footer__base{font-size:11px;gap:8px 16px}
  .footer-icp,.footer-copy{white-space:normal}
}

@media (max-width:560px){
  .site-footer__inner{grid-template-columns:1fr}
  .site-header__cta{display:none}
  .brand__tagline{font-size:11px;letter-spacing:.1em}
  .figure__frame{box-shadow:var(--shadow-hard-sm)}
  .panel{box-shadow:var(--shadow-hard-sm)}
}

/* ---------- 15. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0ms !important;
  }
  .reveal{opacity:1;transform:none}
  .btn:hover{transform:none;box-shadow:var(--shadow-hard-sm)}
  .header-progress{transition:none}
}