/* ============================================================
   PG电玩 · /assets/site.css
   轨道舱仪表盘 × 游戏厅霓虹
   共享层：reset / tokens / 排版 / 刊头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h, 78px) + 18px);
}
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}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:3px}

/* ---------- 2. Tokens ---------- */
:root{
  --space:#070D1F;
  --deep:#0E1B3A;
  --cabin:#14264D;
  --cyan:#38E8FF;
  --cyan-soft:#9DF6FF;
  --magenta:#FF3D9A;
  --amber:#FFB547;
  --mist:#8FA3C8;
  --ice:#EAF4FF;
  --line:#2A3F6B;

  --maxw:1240px;
  --gutter:clamp(18px,4.2vw,40px);
  --header-h:78px;
  --gap:clamp(18px,2.6vw,32px);

  --font-display:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.24s;
}

/* ---------- 3. 基础场景与排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--space);
  background-image:
    radial-gradient(1200px 640px at 50% -14%, rgba(56,232,255,.10), transparent 70%),
    repeating-linear-gradient(90deg, rgba(42,63,107,.22) 0 1px, transparent 1px 160px);
  background-repeat:no-repeat,repeat;
  color:var(--ice);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  color:var(--ice);
  line-height:1.14;
  letter-spacing:.005em;
}
h1{font-size:clamp(30px,4.6vw,54px);line-height:1.06;letter-spacing:-.012em}
h2{font-size:clamp(23px,3vw,34px);line-height:1.16}
h3{font-size:clamp(19px,2vw,23px)}
h4{font-size:16px;letter-spacing:.05em}
p{font-size:16.5px;line-height:1.75}
strong{color:var(--cyan-soft);font-weight:700}
small{font-size:12.5px;color:var(--mist)}

::selection{background:rgba(56,232,255,.28);color:#fff}

/* ---------- 4. 工具类 ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.text-muted{color:var(--mist)}
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;border:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;
}

/* ---------- 5. 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:840px}

#main-content{display:block}
#main-content:focus{outline:none}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 6. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:50%;
  z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 20px;
  background:var(--cyan);
  color:#04101F;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-decoration:none;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 7. 刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,13,31,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

.progress-rail{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:rgba(42,63,107,.55);
  overflow:hidden;
  pointer-events:none;
}
.progress-rail__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan-soft) 45%,var(--magenta) 100%);
  transition:width .12s linear;
}

.header-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  column-gap:clamp(12px,2vw,28px);
}

/* 报头 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  justify-self:start;
  text-decoration:none;
  color:var(--ice);
}
.brand__orbit{
  position:relative;
  flex:none;
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(56,232,255,.18),transparent 62%);
}
.brand__orbit::before{
  content:"";
  position:absolute;
  inset:7px;
  border:1px solid var(--cyan);
  border-radius:50%;
  transform:rotate(-28deg) scaleY(.42);
  box-shadow:0 0 12px rgba(56,232,255,.45);
}
.brand__orbit::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  width:5px;height:5px;
  margin:-2.5px 0 0 -2.5px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
}
.brand__type{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  line-height:1.1;
  letter-spacing:.09em;
  white-space:nowrap;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:9.5px;
  line-height:1.2;
  letter-spacing:.22em;
  color:var(--mist);
  white-space:nowrap;
}

/* 居中栏目 */
.primary-nav{justify-self:center}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.5vw,24px);
}
.nav-link{
  position:relative;
  display:block;
  padding:10px 2px;
  font-size:15px;
  letter-spacing:.04em;
  color:var(--mist);
  text-decoration:none;
  white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:3px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--ice)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan);box-shadow:0 0 8px rgba(56,232,255,.6)}

/* 右侧工具区 */
.header-utility{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:12px;
}
.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 11px;
  border:1px solid var(--line);
  background:rgba(20,38,77,.6);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.07em;
  white-space:nowrap;
}
.status-chip__dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 8px var(--amber);
  animation:pg-pulse 2.8s var(--ease) infinite;
}
@keyframes pg-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.35;transform:scale(.82)}
}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--ice);
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.05em;
  text-decoration:none;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--primary{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04101F;
}
.btn--primary:hover{
  background:var(--cyan-soft);
  border-color:var(--cyan-soft);
  color:#04101F;
  box-shadow:0 0 22px rgba(56,232,255,.35);
}
.btn--ghost{
  border-color:var(--line);
  color:var(--mist);
}
.btn--ghost:hover{border-color:var(--magenta);color:var(--magenta)}
.btn--sm{padding:8px 14px;font-size:13px;letter-spacing:.04em}

/* ---------- 9. 移动菜单按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  border:1px solid var(--line);
  background:rgba(20,38,77,.6);
  color:var(--ice);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:3px;width:16px}
.nav-toggle__bars i{
  display:block;
  height:1.5px;
  background:var(--cyan);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
}
.site-header[data-open] .nav-toggle{border-color:var(--cyan);color:var(--cyan)}
.site-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background-color:var(--deep);
  background-image:repeating-linear-gradient(90deg,rgba(42,63,107,.18) 0 1px,transparent 1px 120px);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan) 30%,var(--magenta) 70%,transparent);
  opacity:.6;
}

.footer-grid{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) clamp(26px,4vw,44px);
  display:grid;
  grid-template-columns:1.7fr .9fr .9fr 1.4fr;
  gap:clamp(24px,3.6vw,56px);
  align-items:start;
}

.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand__text{
  max-width:34ch;
  font-size:14.5px;
  line-height:1.8;
  color:var(--mist);
}
.footer-brand__tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  padding:5px 10px;
  border:1px solid var(--line);
  background:rgba(20,38,77,.55);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}

.footer-col{min-width:0}
.footer-col__title{
  display:block;
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--cyan);
}
.footer-list li+li{margin-top:10px}
.footer-list a{
  display:inline-block;
  font-size:14.5px;
  color:var(--mist);
  text-decoration:none;
  transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{
  color:var(--cyan);
  padding-left:6px;
}

.contact-list{display:grid;gap:12px}
.contact-list li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  color:var(--ice);
  overflow-wrap:anywhere;
}
.contact-list__key{color:var(--mist);letter-spacing:.08em}

.footer-bottom{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:18px var(--gutter) clamp(26px,4vw,36px);
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 28px;
}
.footer-bottom__meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{margin-top:clamp(18px,3vw,30px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumb__list li{display:flex;align-items:center;gap:10px}
.breadcrumb__list li+li::before{
  content:"";
  display:block;
  width:14px;height:1px;
  background:var(--line);
}
.breadcrumb a{color:var(--mist);text-decoration:none;transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--ice)}

/* ---------- 12. 卡片 / 标签 / 长文 ---------- */
.card{
  background:rgba(20,38,77,.5);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,28px);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.card:hover{border-color:var(--line);background:rgba(20,38,77,.72)}
.card--accent{border-left:2px solid var(--cyan)}
.card--accent:hover{border-left-color:var(--magenta)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  background:rgba(20,38,77,.6);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-decoration:none;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
.tag:hover{color:var(--cyan-soft);border-color:var(--cyan)}
.tag[aria-pressed="true"],.tag[aria-current="true"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04101F;
}

.prose{max-width:72ch}
.prose p{font-size:16.5px;line-height:1.8}
.prose p+p{margin-top:1.05em}
.prose h2{margin-top:2.1em;margin-bottom:.62em}
.prose h3{margin-top:1.7em;margin-bottom:.5em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.25em}
.prose ul li{list-style:none;position:relative}
.prose ul li::before{
  content:"";
  position:absolute;
  left:-1.05em;top:.82em;
  width:8px;height:1px;
  background:var(--cyan);
}
.prose ol{counter-reset:pg-ol}
.prose ol li{list-style:none;position:relative;counter-increment:pg-ol}
.prose ol li::before{
  content:counter(pg-ol,decimal-leading-zero);
  position:absolute;
  left:-1.9em;top:0;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--cyan);
}
.prose li{line-height:1.9;color:var(--ice)}
.prose li+li{margin-top:.4em}
.prose a{color:var(--cyan-soft);text-decoration:none;border-bottom:1px solid rgba(157,246,255,.35)}
.prose a:hover{border-bottom-color:var(--cyan)}

/* ---------- 13. 图片容器（页面阶段放占位图） ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:var(--cabin);
  border:1px solid var(--line);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(56,232,255,.14),transparent 46%,rgba(255,61,154,.12));
  pointer-events:none;
}
.media img,.media picture{display:block;width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--21x9{aspect-ratio:21/9}
.media__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  padding:10px 14px;
  background:rgba(7,13,31,.8);
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--mist);
}

/* ---------- 14. 显现与章节锚点 ---------- */
[data-section]{scroll-margin-top:calc(var(--header-h) + 18px)}
.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1180px){
  .status-chip{display:none}
}

@media (max-width:1000px){
  :root{--header-h:66px}

  .header-inner{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:0 12px;
    padding-block:10px;
    min-height:64px;
  }
  .brand{order:1}
  .nav-toggle{order:2;display:inline-flex}
  .primary-nav{order:3;flex:0 0 100%;justify-self:auto;display:none;padding-top:6px}
  .header-utility{order:4;flex:0 0 100%;justify-self:auto;display:none}

  .site-header[data-open] .primary-nav{display:block}
  .site-header[data-open] .header-utility{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    padding:4px 0 16px;
  }
  .site-header[data-open] .status-chip{display:inline-flex}

  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li+li{border-top:1px solid rgba(42,63,107,.55)}
  .nav-link{
    padding:14px 0;
    font-size:16px;
    color:var(--ice);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan);padding-left:12px}
  .nav-link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:6px;height:1px;
    background:var(--cyan);
    transform:translateY(-50%);
  }

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-brand__text{max-width:46ch}
}

@media (max-width:920px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  body{background-image:
    radial-gradient(760px 420px at 50% -8%, rgba(56,232,255,.10), transparent 72%),
    repeating-linear-gradient(90deg, rgba(42,63,107,.18) 0 1px, transparent 1px 96px);
    background-repeat:no-repeat,repeat;
  }
  .brand__sub{display:none}
  .brand__name{font-size:17.5px}
  .brand__orbit{width:32px;height:32px}
  .brand__orbit::before{inset:6px}

  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}

  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .contact-list li{grid-template-columns:minmax(0,1fr);gap:2px}
}

/* ---------- 16. 减少动态偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .status-chip__dot{animation:none;opacity:1;transform:none}
  .js [data-reveal]{opacity:1;transform:none}
  .progress-rail__bar{transition:none}
}