/* ============================================================
   盛世游艺 · 街区坐标导航 — /assets/site.css
   仅承载：reset / 变量 / 中文排版 / 共享页头页脚 / 通用组件
   ============================================================ */

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

/* 2. 设计变量 ---------------------------------------------- */
:root{
  --ink-950:#060A14;
  --ink-800:#0E1830;
  --ink-600:#1A2740;
  --paper-100:#F3EBDD;
  --paper-050:#FBF7EF;
  --cyan-400:#3BE3DC;
  --cyan-700:#128C8C;
  --orange-500:#FF8A3D;
  --red-500:#E2384A;
  --lime-400:#B6F35C;
  --slate-300:#A7B4C9;
  --slate-600:#64748B;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1320px;
  --gutter:clamp(16px,4vw,44px);
  --gap:clamp(16px,2.2vw,30px);
  --header-h:76px;
  --header-h-sm:58px;
  --hair:1px solid var(--ink-600);
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* 3. 基础与中文排版 ---------------------------------------- */
html,body{height:100%}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  background:var(--ink-950);
  color:var(--paper-100);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
p,li{text-wrap:pretty}
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:3px}
.section--paper :focus-visible{outline-color:var(--cyan-700)}
#main-content{scroll-margin-top:calc(var(--header-h-sm) + 14px)}
::selection{background:var(--orange-500);color:var(--ink-950)}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* 4. 布局骨架 ---------------------------------------------- */
.wrap{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{position:relative;padding-block:clamp(48px,7vw,104px)}
.section--lead{padding-top:calc(var(--header-h) + clamp(28px,5vw,72px))}
.section--ink{background:var(--ink-950);color:var(--paper-100)}
.section--panel{background:var(--ink-800);color:var(--paper-100)}
.section--paper{background:var(--paper-100);color:var(--ink-950)}

/* 色带分隔：四段硬切，无渐变铺满 */
.band{display:grid;grid-template-columns:3fr 1.2fr 1fr .8fr;height:5px;width:100%}
.band__seg:nth-child(1){background:var(--cyan-400)}
.band__seg:nth-child(2){background:var(--orange-500)}
.band__seg:nth-child(3){background:var(--red-500)}
.band__seg:nth-child(4){background:var(--lime-400)}

.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.span-12{grid-column:span 12}
.md-4,.md-6,.md-8{grid-column:span 12}
.lg-3,.lg-4,.lg-5,.lg-6,.lg-7,.lg-8{grid-column:span 12}

.split{display:grid;grid-template-columns:1fr;gap:var(--gap);align-items:start}
.sticky-side{position:sticky;top:calc(var(--header-h-sm) + 24px)}

@media (min-width:760px){
  .md-4{grid-column:span 4}
  .md-6{grid-column:span 6}
  .md-8{grid-column:span 8}
}
@media (min-width:1040px){
  .split{grid-template-columns:38fr 62fr}
  .split--flip{grid-template-columns:62fr 38fr}
  .split--even{grid-template-columns:1fr 1fr}
  .lg-3{grid-column:span 3}
  .lg-4{grid-column:span 4}
  .lg-5{grid-column:span 5}
  .lg-6{grid-column:span 6}
  .lg-7{grid-column:span 7}
  .lg-8{grid-column:span 8}
}

/* 5. 排版工具 ---------------------------------------------- */
.display{
  font-weight:900;letter-spacing:-.02em;line-height:1.04;
  font-size:clamp(2.4rem,6.4vw,4.6rem);
}
.display--sm{font-size:clamp(1.75rem,4.2vw,3rem)}
.lede{
  font-size:clamp(1rem,1.35vw,1.15rem);line-height:1.85;
  max-width:58ch;color:var(--slate-300);
}
.section--paper .lede{color:var(--slate-600)}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.26em;
  color:var(--cyan-400);text-transform:uppercase;
}
.kicker::before{content:"";width:24px;height:1px;background:currentColor}
.section--paper .kicker{color:var(--cyan-700)}
.vnote{
  writing-mode:vertical-rl;font-size:12px;letter-spacing:.3em;
  line-height:1;color:var(--slate-300);
}
.section--paper .vnote{color:var(--slate-600)}
.mono-num{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(2.5rem,6vw,5rem);line-height:.9;letter-spacing:-.03em;
  color:var(--cyan-400);
}
.section--paper .mono-num{color:var(--cyan-700)}
.rule{height:1px;background:var(--ink-600);border:0;margin:0}
.section--paper .rule{background:rgba(6,10,20,.16)}

/* 6. 通用组件 ---------------------------------------------- */
.tag{
  display:inline-block;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.16em;line-height:1.5;padding:3px 8px;
  border:1px solid currentColor;white-space:nowrap;
}
.tag--cyan{color:var(--cyan-400)}
.tag--orange{color:var(--orange-500)}
.tag--red{color:var(--red-500)}
.tag--lime{color:var(--lime-400)}
.tag--paper{color:var(--paper-100)}
.section--paper .tag--cyan{color:var(--cyan-700)}

.btn{
  display:inline-flex;align-items:center;gap:8px;min-height:46px;
  padding:0 20px;border:1px solid var(--ink-600);background:transparent;
  font-weight:700;font-size:15px;letter-spacing:.02em;color:var(--paper-100);
  transition:background-color .2s linear,color .2s linear,border-color .2s linear;
}
.btn:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.btn--primary{background:var(--orange-500);border-color:var(--orange-500);color:var(--ink-950)}
.btn--primary:hover{background:var(--cyan-400);border-color:var(--cyan-400);color:var(--ink-950)}
.btn--sign::after{content:"\2192";transition:transform .2s var(--ease)}
.btn--sign:hover::after{transform:translateX(4px)}
.section--paper .btn{border-color:rgba(6,10,20,.28);color:var(--ink-950)}
.section--paper .btn:hover{border-color:var(--cyan-700);color:var(--cyan-700)}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--slate-300);
}
.section--paper .crumbs{color:var(--slate-600)}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__item + .crumbs__item::before{content:"/";color:var(--ink-600)}
.crumbs__link:hover{color:var(--cyan-400)}
.crumbs__item[aria-current="page"]{color:var(--paper-100)}
.section--paper .crumbs__item[aria-current="page"]{color:var(--ink-950)}

.board{
  position:relative;border:var(--hair);background:var(--ink-800);
  padding:clamp(18px,2.4vw,28px);
}
.board__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:10px;padding-bottom:14px;margin-bottom:16px;border-bottom:var(--hair);
}
.board__title{font-size:clamp(1.1rem,1.7vw,1.35rem);font-weight:900;letter-spacing:-.01em}
.board__meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;color:var(--slate-300)}
.board__body{font-size:15px;line-height:1.8;color:var(--slate-300)}
.board--paper{background:var(--paper-050);border-color:rgba(6,10,20,.16);color:var(--ink-950)}
.board--paper .board__head{border-color:rgba(6,10,20,.16)}
.board--paper .board__meta,.board--paper .board__body{color:var(--slate-600)}

.note-list{display:grid;gap:10px}
.note-list__item{position:relative;padding-left:18px;font-size:14.5px;line-height:1.75}
.note-list__item::before{
  content:"";position:absolute;left:0;top:.72em;
  width:7px;height:7px;background:var(--cyan-400);
}

.figure{margin:0}
.figure__frame{
  position:relative;overflow:hidden;border:var(--hair);
  background-color:var(--ink-800);
  background-image:
    repeating-linear-gradient(90deg,transparent 0 31px,rgba(59,227,220,.14) 31px 32px),
    repeating-linear-gradient(0deg,transparent 0 31px,rgba(59,227,220,.14) 31px 32px);
  aspect-ratio:16/9;
}
.figure__frame--tall{aspect-ratio:4/5}
.figure__frame--wide{aspect-ratio:21/9}
.figure__frame--square{aspect-ratio:1/1}
.figure__img{width:100%;height:100%;object-fit:cover}
.figure__cap{margin-top:10px;font-size:13px;line-height:1.7;color:var(--slate-300)}
.section--paper .figure__frame{background-color:var(--paper-050);border-color:rgba(6,10,20,.16)}
.section--paper .figure__cap{color:var(--slate-600)}

.filter{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.filter__bar{display:flex;flex-wrap:wrap;gap:8px}
.filter__btn{
  display:inline-flex;align-items:center;min-height:38px;padding:0 14px;
  border:1px solid var(--ink-600);background:transparent;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--slate-300);
  transition:color .2s linear,border-color .2s linear,background-color .2s linear;
}
.filter__btn:hover{color:var(--paper-100);border-color:var(--cyan-400)}
.filter__btn[aria-pressed="true"]{
  background:var(--cyan-400);border-color:var(--cyan-400);
  color:var(--ink-950);font-weight:700;
}
.filter__count{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--slate-300)}
.filter__count b{color:var(--orange-500)}
.section--paper .filter__btn{border-color:rgba(6,10,20,.24);color:var(--slate-600)}
.section--paper .filter__btn:hover{color:var(--ink-950);border-color:var(--cyan-700)}
.section--paper .filter__btn[aria-pressed="true"]{background:var(--cyan-700);border-color:var(--cyan-700);color:var(--paper-050)}
.section--paper .filter__count{color:var(--slate-600)}

/* 滚动显现 */
[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
[data-reveal].is-inview{opacity:1;transform:translateY(0)}
@media (scripting:none){
  [data-reveal]{opacity:1;transform:none}
}

/* 7. 页头 -------------------------------------------------- */
.sh-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:transparent;border-bottom:1px solid transparent;
  color:var(--paper-100);
  transition:background-color .28s linear,border-color .28s linear;
}
.sh-header[data-scrolled]{
  background:rgba(6,10,20,.96);
  border-bottom-color:var(--ink-600);
}
.sh-header__inner{
  display:flex;align-items:center;gap:clamp(14px,2vw,32px);
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:var(--gutter);height:var(--header-h);
  transition:height .28s var(--ease);
}
.sh-header[data-scrolled] .sh-header__inner{height:var(--header-h-sm)}

.sh-skip{
  position:fixed;top:8px;left:8px;z-index:120;
  transform:translateY(-180%);
  background:var(--cyan-400);color:var(--ink-950);
  padding:10px 16px;font-size:14px;font-weight:700;
  transition:transform .2s var(--ease);
}
.sh-skip:focus{transform:none}

.sh-brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.sh-brand__mark{
  width:34px;height:34px;display:grid;place-items:center;
  border:1px solid var(--cyan-400);border-left:3px solid var(--orange-500);
  color:var(--cyan-400);font-weight:900;font-size:16px;line-height:1;
}
.sh-brand__text{display:flex;flex-direction:column;line-height:1.15}
.sh-brand__name{font-weight:900;font-size:17px;letter-spacing:.02em}
.sh-brand__sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;
  color:var(--slate-300);
}

.sh-nav{margin-left:auto}
.sh-nav__list{display:flex;align-items:center;gap:clamp(6px,1.3vw,18px)}
.sh-nav__link{
  position:relative;display:flex;flex-direction:column;gap:1px;
  padding:8px 10px;color:var(--slate-300);
  transition:color .2s linear,padding .28s var(--ease);
}
.sh-nav__idx{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;
  color:var(--cyan-400);opacity:.55;
}
.sh-nav__label{font-size:14.5px;line-height:1.4;transition:color .2s linear}
.sh-nav__link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:3px;height:2px;
  background:var(--orange-500);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.sh-nav__link:hover .sh-nav__label{color:var(--paper-100)}
.sh-nav__link:hover::after{transform:scaleX(1)}
.sh-nav__link[aria-current="page"] .sh-nav__label{color:var(--paper-100);font-weight:700}
.sh-nav__link[aria-current="page"] .sh-nav__idx{opacity:1}
.sh-nav__link[aria-current="page"]::after{background:var(--cyan-400);transform:scaleX(1)}
.sh-header[data-scrolled] .sh-nav__link{padding-block:4px}
.sh-nav__tail{display:none}

.sh-utils{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.sh-version{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--lime-400);border:1px solid var(--ink-600);
  background:rgba(14,24,48,.6);padding:5px 9px;line-height:1.2;
}
.sh-coord{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--orange-500);color:var(--ink-950);
  font-size:13px;font-weight:700;padding:9px 14px;line-height:1.2;
  transition:background-color .2s linear;
}
.sh-coord::after{content:"\2192";transition:transform .2s var(--ease)}
.sh-coord:hover{background:var(--cyan-400)}
.sh-coord:hover::after{transform:translateX(4px)}

.sh-burger{display:none;align-items:center;gap:9px;padding:8px 11px;border:1px solid var(--ink-600);color:var(--paper-100);font-size:13px;font-weight:700}
.sh-burger__bars{display:grid;gap:4px;width:18px}
.sh-burger__bars span{display:block;height:2px;background:var(--cyan-400);transition:transform .24s var(--ease)}
.sh-burger[aria-expanded="true"] .sh-burger__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.sh-burger[aria-expanded="true"] .sh-burger__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.sh-scrim{
  position:fixed;inset:0;z-index:88;background:rgba(6,10,20,.72);
  opacity:0;pointer-events:none;transition:opacity .24s linear;
}
.sh-scrim[data-open]{opacity:1;pointer-events:auto}

.sh-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  transform:scaleX(0);transform-origin:left;
  background:linear-gradient(90deg,var(--cyan-400) 0 62%,var(--orange-500) 62% 100%);
}

/* 页头 · 移动抽屉（断点 1080px，与 site.js 保持一致） */
@media (max-width:1080px){
  .sh-utils{display:none}
  .sh-burger{display:inline-flex;position:relative;z-index:96}
  .sh-header__inner{gap:12px}
  .sh-brand{margin-right:auto}
  .sh-nav{
    position:fixed;top:0;left:0;bottom:0;z-index:95;
    width:min(86vw,380px);margin:0;padding:calc(var(--header-h) + 20px) 24px 36px;
    background:var(--ink-800);border-right:var(--hair);
    overflow-y:auto;transform:translateX(-102%);
    transition:transform .32s var(--ease);
  }
  .sh-nav[data-open]{transform:translateX(0)}
  .sh-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .sh-nav__item{border-bottom:var(--hair)}
  .sh-nav__item:first-child{border-top:var(--hair)}
  .sh-nav__link{flex-direction:row;align-items:baseline;gap:12px;padding:15px 4px;font-weight:900;letter-spacing:-.01em;color:var(--paper-100)}
  .sh-nav__link::after{left:0;right:0;bottom:0;height:2px}
  .sh-nav__idx{font-size:11px;opacity:.8}
  .sh-nav__item:nth-child(1) .sh-nav__link{font-size:clamp(26px,7.6vw,34px)}
  .sh-nav__item:nth-child(2) .sh-nav__link{font-size:clamp(24px,7vw,31px)}
  .sh-nav__item:nth-child(3) .sh-nav__link{font-size:clamp(22px,6.4vw,28px)}
  .sh-nav__item:nth-child(4) .sh-nav__link{font-size:clamp(20px,5.8vw,25px)}
  .sh-nav__item:nth-child(5) .sh-nav__link{font-size:clamp(18px,5.2vw,22px)}
  .sh-nav__item:nth-child(6) .sh-nav__link{font-size:clamp(16px,4.6vw,20px)}
  .sh-nav__tail{display:block;margin-top:28px;padding-top:22px;border-top:1px dashed var(--ink-600)}
  .sh-nav__tailTitle{
    font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
    color:var(--slate-300);margin-bottom:14px;
  }
  .sh-nav__tail .sh-version{display:inline-block;margin-bottom:14px}
  .sh-nav__tail .sh-coord{display:inline-flex}
}

/* 8. 页脚 -------------------------------------------------- */
.sf-footer{
  position:relative;background:var(--ink-950);color:var(--slate-300);
  border-top:var(--hair);
}
.sf-inner{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 28px;
  background-image:repeating-linear-gradient(90deg,transparent 0 79px,rgba(59,227,220,.045) 79px 80px);
}
.sf-top{display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,48px)}
.sf-brand__lock{
  display:inline-block;font-weight:900;font-size:clamp(1.05rem,1.8vw,1.3rem);
  letter-spacing:-.01em;line-height:1.35;color:var(--paper-100);
  border-left:3px solid var(--orange-500);padding-left:11px;
}
.sf-brand__line{margin-top:14px;font-size:14px;line-height:1.85;max-width:34ch}
.sf-brand__meta{margin-top:14px}

.sf-col__title{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  color:var(--cyan-400);text-transform:uppercase;
  padding-bottom:10px;margin-bottom:12px;border-bottom:var(--hair);
}
.sf-col__list{display:grid;gap:2px}
.sf-col__link{
  display:inline-block;padding:5px 0;font-size:14.5px;color:var(--paper-100);
  transition:color .2s linear,transform .2s var(--ease);
}
.sf-col__link:hover{color:var(--cyan-400);transform:translateX(4px)}

.sf-contact__title{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  color:var(--cyan-400);text-transform:uppercase;
  padding-bottom:10px;margin-bottom:12px;border-bottom:var(--hair);
}
.sf-contact__list{display:grid;gap:9px}
.sf-contact__row{display:grid;grid-template-columns:46px 1fr;gap:10px;align-items:baseline;font-size:14px}
.sf-contact__key{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--cyan-400);opacity:.75;
}
.sf-contact__val{color:var(--paper-100);word-break:break-word}
.sf-contact__note{
  margin-top:15px;padding-left:11px;border-left:2px solid var(--red-500);
  font-size:13px;line-height:1.8;
}

.sf-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;margin-top:clamp(28px,4vw,48px);padding-top:20px;
  border-top:var(--hair);font-size:12.5px;
}
.sf-legal-links{display:flex;flex-wrap:wrap;gap:8px 18px}
.sf-legal-link{color:var(--paper-100);opacity:.85;transition:color .2s linear,opacity .2s linear}
.sf-legal-link:hover{color:var(--cyan-400);opacity:1}
.sf-note{flex:1 1 320px;min-width:0;line-height:1.75}
.sf-legal{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em}
.sf-copy{color:var(--paper-100);font-weight:700}

@media (min-width:760px){
  .sf-top{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1100px){
  .sf-top{grid-template-columns:minmax(230px,1.3fr) repeat(3,minmax(108px,.7fr)) minmax(230px,1.2fr)}
}

/* 9. 降低动态偏好 ------------------------------------------ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .sh-header,.sh-header__inner,.sh-nav,.sh-nav__link,.sh-scrim,.sh-skip,
  .sh-burger__bars span,.btn,.btn--sign::after,.sh-coord,.sh-coord::after,
  .sf-col__link{transition:none}
}