/* PG游艺 简体中文站 · 共享样式 /assets/site.css */

/* ---------- 01 设计变量 ---------- */
:root{
  --bg:#0B1026;
  --bg-2:#131A3A;
  --line:#1D2650;
  --cyan:#00E5D0;
  --cyan-soft:#7FF6EC;
  --amber:#F2A93B;
  --amber-soft:#FFD79A;
  --violet:#8E8AA8;
  --violet-soft:#C9C6D4;
  --ink:#EDEDF2;
  --ink-deep:#0A0D1C;
  --clay:#B5705A;
  --shell:1280px;
  --gutter:24px;
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Arial Narrow","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
}

/* ---------- 02 Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit;background:none}
table{border-collapse:collapse;width:100%}
a{color:inherit;text-decoration:none}
:where(a,button,[tabindex],summary):focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:var(--radius)}

/* ---------- 03 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--bg);
  background-image:linear-gradient(90deg,rgba(29,38,80,.42) 1px,transparent 1px);
  background-size:96px 100%;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:1025px){
  body{font-size:17px}
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;letter-spacing:-.01em;line-height:1.2}
.mono{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 04 容器与网格 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.shell--narrow{max-width:960px}
.section{padding:96px 0;position:relative}
.section--tight{padding:64px 0}
.section--panel{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--deep{background:var(--ink-deep)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-10{grid-column:span 10}
.col-12{grid-column:span 12}
.hairline{height:1px;background:var(--line);border:0;width:100%}
.slash-rule{display:block;width:96px;height:2px;background:var(--cyan);transform:rotate(-7deg);transform-origin:left center;margin:8px 0 20px}

/* ---------- 05 章节头 ---------- */
.section-head{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter);align-items:start}
.section-number{
  grid-column:span 2;
  font-family:var(--font-mono);
  font-size:64px;
  font-weight:600;
  line-height:.9;
  letter-spacing:-.02em;
  color:rgba(0,229,208,.28);
  -webkit-text-stroke:1px var(--cyan);
}
.section-title{font-size:clamp(28px,3.4vw,40px);color:var(--ink)}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:12px;
}
.lede{font-size:18px;line-height:1.7;color:var(--violet-soft);max-width:34em;margin-top:16px}

/* ---------- 06 按钮 / 标签 / 链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;border-radius:var(--radius);
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-amber{background:var(--amber);border-color:var(--amber);color:#0B1026}
.btn-amber:hover,.btn-amber:focus-visible{background:var(--amber-soft);border-color:var(--amber-soft)}
.btn-cyan{border-color:var(--cyan);color:var(--cyan);background:transparent}
.btn-cyan:hover,.btn-cyan:focus-visible{background:rgba(0,229,208,.1);color:var(--cyan-soft);border-color:var(--cyan-soft)}
.btn-compact{min-height:36px;padding:0 14px;font-size:13px}
.tag{
  display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  padding:3px 8px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--violet-soft);background:rgba(201,198,212,.05);
}
.tag--amber{color:var(--amber);border-color:rgba(242,169,59,.5);background:rgba(242,169,59,.1)}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,208,.45);background:rgba(0,229,208,.08)}
.link-cyan{color:var(--cyan);border-bottom:1px solid rgba(0,229,208,.45);transition:color .2s var(--ease),border-color .2s var(--ease)}
.link-cyan:hover{border-color:var(--cyan-soft);color:var(--cyan-soft)}

/* ---------- 07 面包屑 ---------- */
.breadcrumb{margin-bottom:48px}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;font-family:var(--font-mono);font-size:12px;color:var(--violet)}
.breadcrumb-item{display:flex;align-items:center;min-height:32px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";margin:0 10px;color:var(--line);background:none}
.breadcrumb-link{color:var(--violet-soft)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--ink)}

/* ---------- 08 正文 ---------- */
.prose{max-width:34em;font-size:17px;line-height:1.7;color:var(--ink)}
.prose--wide{max-width:46em}
.prose > * + *{margin-top:1em}
.prose h2{font-size:24px;margin-top:1.8em}
.prose h3{font-size:18px;font-family:var(--font-body);font-weight:700;margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(0,229,208,.45)}
.prose strong{font-weight:700;color:var(--cyan-soft)}
.prose blockquote{border-left:2px solid var(--line);padding-left:16px;color:var(--violet);font-size:15px}
.prose code{font-family:var(--font-mono);font-size:14px;color:var(--amber-soft)}

/* ---------- 09 卡片 / 旁注 / 索引栏 ---------- */
.card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-top:2px solid var(--cyan);
  border-radius:var(--radius);
  padding:28px 26px;
}
.card-title{font-size:20px;margin-bottom:10px;color:var(--ink)}
.card-text{font-size:15px;color:var(--violet-soft);max-width:32em}
.cards-stagger{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--gutter)}
@media (min-width:1025px){
  .cards-stagger > *:nth-child(even){transform:translateY(40px)}
}
.note{border-left:1px solid var(--line);padding-left:14px;font-size:13px;line-height:1.6;color:var(--violet)}
.slim-aside{grid-column:span 3;justify-self:end;font-size:13px;line-height:1.6;color:var(--violet)}
.rail{position:sticky;top:104px;font-family:var(--font-mono);font-size:12px}
.rail-list{display:flex;flex-direction:column;gap:2px}
.rail-link{display:flex;align-items:center;min-height:32px;color:var(--violet);border-left:1px solid var(--line);padding-left:10px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.rail-link:hover{color:var(--cyan-soft)}
.rail-link[aria-current="true"]{color:var(--amber);border-left-color:var(--amber)}

/* ---------- 10 步骤 / 折叠 / 切换 ---------- */
.steps{display:grid;gap:32px;counter-reset:step}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start}
.step-index{
  font-family:var(--font-mono);font-size:14px;font-weight:600;
  color:var(--cyan);border:1px solid var(--line);
  width:44px;height:44px;display:grid;place-items:center;border-radius:var(--radius);
}
.step-title{font-size:18px;margin-bottom:6px}
.step-text{font-size:15px;color:var(--violet-soft);max-width:32em}
.accordion{border-top:1px solid var(--line)}
.accordion-item{border-bottom:1px solid var(--line)}
.accordion-trigger{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 0;text-align:left;font-family:var(--font-body);font-size:16px;font-weight:600;
  color:var(--ink);cursor:pointer;border:0;
  transition:color .2s var(--ease);
}
.accordion-trigger::after{content:"+";font-family:var(--font-mono);font-size:16px;color:var(--cyan);transition:transform .24s var(--ease),color .24s var(--ease)}
.accordion-item[data-open] .accordion-trigger{color:var(--amber)}
.accordion-item[data-open] .accordion-trigger::after{transform:rotate(45deg);color:var(--amber)}
.accordion-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s var(--ease)}
.accordion-item[data-open] .accordion-panel{grid-template-rows:1fr}
.accordion-body{overflow:hidden;font-size:15px;line-height:1.7;color:var(--violet-soft);max-width:40em}
.accordion-item[data-open] .accordion-body{padding-bottom:20px}
.segmented{display:inline-flex;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.segment{
  min-height:44px;padding:0 18px;border:0;border-right:1px solid var(--line);
  font-size:14px;color:var(--violet-soft);cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.segment:last-child{border-right:0}
.segment:hover{color:var(--cyan-soft)}
.segment[aria-selected="true"]{background:rgba(242,169,59,.14);color:var(--amber);font-weight:700}
[data-panel]{display:none}
[data-panel][data-active]{display:block}

/* ---------- 11 图片容器 ---------- */
.figure-frame{
  position:relative;display:block;width:100%;
  background:var(--bg-2);
  border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
}
.figure-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(135deg,rgba(0,229,208,.10),transparent 42%),
    linear-gradient(315deg,rgba(242,169,59,.08),transparent 38%);
}
.figure-frame img{width:100%;height:100%;object-fit:cover}
.figure-frame--16x9{aspect-ratio:16/9}
.figure-frame--4x3{aspect-ratio:4/3}
.figure-frame--1x1{aspect-ratio:1/1}
.figure-frame--3x4{aspect-ratio:3/4}
.figure-frame--glow{box-shadow:0 0 0 1px rgba(0,229,208,.28),0 24px 60px -32px rgba(0,229,208,.45)}
.figure-caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;color:var(--violet)}

/* ---------- 12 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 13 页眉 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,16,38,.96);
  border-bottom:1px solid var(--line);
}
.skip-link{
  position:fixed;top:10px;left:12px;z-index:200;
  transform:translateY(-160%);
  background:var(--amber);color:#0B1026;font-size:14px;font-weight:700;
  padding:10px 16px;border-radius:var(--radius);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:none}
.header-shell{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:16px var(--gutter);
  display:flex;align-items:center;gap:20px;
  transition:padding .24s var(--ease);
}
.header-brand{flex:0 0 auto}
.brand-link{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:38px;height:38px;flex:0 0 auto;
  display:grid;place-items:center;
  border:1px solid var(--cyan);border-radius:var(--radius);
  color:var(--cyan);font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
}
.brand-text{display:block}
.brand-name{display:block;font-family:var(--font-display);font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--ink)}
.brand-claim{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--violet)}
.header-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px;counter-reset:navidx}
.nav-item{counter-increment:navidx}
.nav-link{
  display:inline-flex;align-items:center;min-height:44px;padding:0 12px;
  font-size:14px;color:var(--violet-soft);
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.nav-link::before{
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10px;color:var(--violet);
  margin-right:8px;transition:color .2s var(--ease);
}
.nav-link:hover{color:var(--cyan-soft)}
.nav-link:hover::before{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan)}
.nav-link[aria-current="page"]::before{color:var(--cyan)}
.header-cta{flex:0 0 auto}
.header-rule{height:1px;background:var(--line)}
.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.scroll-progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
}
.nav-toggle{
  display:none;align-items:center;gap:8px;margin-left:auto;
  min-height:44px;padding:0 10px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--violet-soft);cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:flex;flex-direction:column;gap:5px;width:18px}
.nav-toggle-bar{display:block;height:1px;background:currentColor}
.nav-toggle-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.thumb-bar{display:none}
.site-header.is-condensed .header-shell{padding-top:10px;padding-bottom:10px}
@media (min-width:1025px){
  .site-header.is-condensed .brand-claim{display:none}
}

/* ---------- 14 页脚 ---------- */
.site-footer{position:relative;background:var(--ink-deep);border-top:1px solid var(--line);color:var(--violet-soft)}
.footer-clay-rule{display:block;height:1px;background:linear-gradient(90deg,var(--clay),rgba(181,112,90,0) 60%)}
.footer-shell{width:100%;max-width:var(--shell);margin-inline:auto;padding:72px var(--gutter) 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:48px var(--gutter)}
.footer-brand-name{font-family:var(--font-display);font-size:22px;font-weight:800;color:var(--ink);letter-spacing:.02em}
.footer-brand-line{margin-top:8px;font-family:var(--font-mono);font-size:12px;color:var(--violet);letter-spacing:.02em}
.footer-note{margin-top:16px;font-size:13px;line-height:1.6;color:var(--violet);max-width:24em}
.footer-col-title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.14em;
  color:var(--cyan);margin-bottom:16px;
}
.footer-col-title::before{content:"";display:inline-block;width:16px;height:1px;background:var(--cyan);vertical-align:middle;margin-right:10px}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-link{
  display:inline-flex;align-items:center;min-height:36px;font-size:14px;color:var(--violet-soft);
  transition:color .2s var(--ease);
}
.footer-link:hover{color:var(--cyan)}
.footer-contact-list{display:flex;flex-direction:column;gap:14px}
.footer-contact-item{display:flex;flex-direction:column;gap:3px}
.footer-contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--violet)}
.footer-contact-value{font-size:14px;color:var(--ink);word-break:break-word}
.footer-legal{
  margin-top:56px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
}
.footer-legal-meta{font-family:var(--font-mono);font-size:12px;color:var(--violet)}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal-link{font-family:var(--font-mono);font-size:12px;color:var(--violet-soft);transition:color .2s var(--ease)}
.footer-legal-link:hover{color:var(--cyan)}

/* ---------- 15 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .section-number{grid-column:span 12;font-size:48px;-webkit-text-stroke:1px var(--cyan);margin-bottom:8px}
  .section-title,.lede,.section-head > .col-7,.section-head > .prose{grid-column:span 12}
  .slim-aside{grid-column:span 12;justify-self:start}
  .col-3,.col-4,.col-5,.col-6,.col-7{grid-column:span 6}
  .col-8,.col-9,.col-10{grid-column:span 12}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px var(--gutter)}
  .footer-brand{grid-column:span 2}
  .footer-contact{grid-column:span 2}
  /* 移动索引导航 */
  .nav-toggle{display:inline-flex}
  .header-nav{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:80;
    padding:110px var(--gutter) 96px;
    background:rgba(10,13,28,.985);
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-12px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
  }
  .header-nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;counter-reset:navidx}
  .nav-item{border-bottom:1px solid var(--line)}
  .nav-link{
    width:100%;min-height:64px;padding:0;font-size:20px;
    font-family:var(--font-display);font-weight:800;
    border-bottom:0;border-left:2px solid transparent;padding-left:16px;
  }
  .nav-link::before{font-size:12px;margin-right:12px;color:var(--cyan)}
  .nav-link[aria-current="page"]{border-left-color:var(--amber);color:var(--amber);border-bottom-color:transparent}
  .nav-link[aria-current="page"]::before{color:var(--amber)}
  body.nav-open{overflow:hidden}
  /* 拇指热区条 */
  .thumb-bar{
    display:grid;grid-template-columns:repeat(4,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:70;
    height:calc(56px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:#0A0D1C;border-top:1px solid var(--line);
  }
  .thumb-link{
    position:relative;display:flex;align-items:center;justify-content:center;
    min-height:56px;padding:0 4px;text-align:center;
    font-size:11px;letter-spacing:-.01em;line-height:1.3;color:var(--violet-soft);
  }
  .thumb-link[aria-current="page"]{color:var(--cyan)}
  .thumb-link[aria-current="page"]::before{content:"";position:absolute;top:0;left:14%;right:14%;height:2px;background:var(--cyan)}
  body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}
}
@media (max-width:640px){
  :root{--gutter:18px}
  .header-shell{padding:12px var(--gutter);gap:12px}
  .brand-mark{width:34px;height:34px;font-size:12px}
  .brand-name{font-size:15px}
  .brand-claim{display:none}
  .header-cta .btn-compact{min-height:36px;padding:0 12px;font-size:12px}
  .grid-12 > *{grid-column:span 12}
  .cards-stagger{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand,.footer-contact{grid-column:span 1}
  .footer-shell{padding-top:56px}
  .section{padding:56px 0}
  .step{grid-template-columns:1fr;gap:12px}
}

/* ---------- 16 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .scroll-progress-bar{transition:none}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}