*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ink);color:var(--paper);font-family:var(--font-body);font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}
[data-filter-item][hidden]{display:none!important}
:root{
  --ink:#061826;
  --ink-2:#0A2233;
  --ink-3:#0d2b3f;
  --paper:#F4F7F8;
  --ash:#9EB1BA;
  --mint:#29F2C2;
  --coral:#FF6B4A;
  --steel:#2A5D7A;
  --indigo:#3A2E6E;
  --wine:#5B1F2E;
  --score:#0B0F12;
  --line:rgba(42,93,122,.55);
  --line-soft:rgba(42,93,122,.35);
  --font-display:"Arial Narrow","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
  --wrap:1240px;
  --gutter:clamp(16px,3vw,40px);
  --shadow-hard:6px 6px 0 var(--score);
  --shadow-soft:4px 4px 0 var(--score);
}
:where(a,button,input,select,textarea,[tabindex]):focus-visible{outline:3px solid var(--mint);outline-offset:3px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 通用容器 ---------- */
.wrap{width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:minmax(0,240px) minmax(0,1fr)}
.stack>*+*{margin-top:var(--stack-gap,1rem)}
.scroll-x{overflow-x:auto;scrollbar-width:thin;scrollbar-color:var(--steel) transparent}

/* ---------- 排版 ---------- */
.title-xl,.title-lg,.title-md{font-family:var(--font-display);font-weight:900;line-height:1.02;letter-spacing:-.01em;color:var(--paper)}
.title-xl{font-size:clamp(2.6rem,7.4vw,5.6rem);line-height:.94;letter-spacing:-.02em}
.title-lg{font-size:clamp(1.9rem,4vw,3.1rem)}
.title-md{font-size:clamp(1.25rem,2.2vw,1.85rem);line-height:1.2}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.eyebrow{display:inline-flex;align-items:center;gap:.6em;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--mint)}
.eyebrow::before{content:"";width:18px;height:2px;background:currentColor}
.eyebrow--coral{color:var(--coral)}
.badge{display:inline-block;padding:.16em .6em;border:1px solid var(--steel);font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;color:var(--ash)}
.badge--mint{color:var(--mint);border-color:var(--mint)}
.prose{max-width:72ch}
.prose>*+*{margin-top:1em}
.prose h2,.prose h3{font-family:var(--font-display);font-weight:900;line-height:1.15;color:var(--paper);margin-top:1.8em}
.prose h2{font-size:clamp(1.4rem,2.4vw,2rem)}
.prose h3{font-size:clamp(1.15rem,1.8vw,1.45rem)}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.4em}
.prose a,.sweep{background:linear-gradient(var(--mint),var(--mint)) no-repeat 0 100%/0 2px;padding-bottom:1px;transition:background-size .28s ease,color .2s ease}
.prose a:hover,.sweep:hover{background-size:100% 2px;color:var(--mint)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:.7em;padding:.8em 1.4em;border:2px solid var(--mint);background:transparent;color:var(--mint);font-family:var(--font-mono);font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.btn:hover{background:var(--mint);color:var(--score);transform:translate(-2px,-2px);box-shadow:var(--shadow-soft)}
.btn--solid{background:var(--mint);color:var(--score)}
.btn--solid:hover{background:var(--paper);border-color:var(--paper);color:var(--score)}
.btn--coral{border-color:var(--coral);color:var(--coral)}
.btn--coral:hover{background:var(--coral);border-color:var(--coral);color:var(--score)}

/* ---------- 卡片与分区底色 ---------- */
.card{background:var(--ink-2);border:2px solid var(--steel);padding:clamp(18px,2.4vw,28px);box-shadow:var(--shadow-hard)}
.card--indigo{background:var(--indigo);border-color:rgba(244,247,248,.22)}
.card--wine{background:var(--wine);border-color:rgba(244,247,248,.22)}
.card--flat{box-shadow:none}
.tint-night{background:var(--ink-2)}
.tint-indigo{background:var(--indigo)}
.tint-wine{background:var(--wine)}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.6em;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.1em;color:var(--ash)}
.breadcrumb a{color:var(--ash);transition:color .2s ease}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb li{display:inline-flex;align-items:center;gap:.6em}
.breadcrumb li+li::before{content:"/";color:var(--steel)}

/* ---------- 图片容器（页面阶段放占位） ---------- */
.media{position:relative;display:block;overflow:hidden;border:2px solid var(--steel);background:var(--ink-2) repeating-linear-gradient(135deg,rgba(42,93,122,.35) 0 2px,transparent 2px 12px)}
.media>img,.media>svg,.media>picture>img{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--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media__caption{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--ash);margin-top:.6em}
.media__tag{position:absolute;left:0;top:0;padding:.3em .7em;background:var(--score);color:var(--mint);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em}

/* ---------- 滚动进度条 ---------- */
.scroll-meter{position:fixed;top:0;left:0;right:0;height:3px;z-index:120;background:rgba(42,93,122,.3);pointer-events:none}
.scroll-meter__fill{display:block;height:100%;width:0;background:var(--mint);box-shadow:0 0 10px rgba(41,242,194,.7)}

/* ---------- 跳过链接 ---------- */
.skip-link{position:absolute;left:16px;top:-120px;z-index:200;background:var(--mint);color:var(--score);padding:10px 16px;font-family:var(--font-mono);font-size:.8rem;letter-spacing:.1em;transition:top .2s ease}
.skip-link:focus{top:10px}

/* ---------- 页头 ---------- */
.site-header{position:relative;background:var(--ink);border-bottom:2px solid var(--steel)}
.header-rail{display:flex;align-items:center;gap:clamp(8px,1.6vw,18px);padding:9px var(--gutter);border-bottom:1px solid var(--line-soft);font-family:var(--font-mono);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ash)}
.rail-chip{flex:none;padding:2px 8px;border:1px solid var(--mint);color:var(--mint)}
.rail-ticks{flex:1;height:8px;background-image:repeating-linear-gradient(90deg,var(--steel) 0 1px,transparent 1px 18px);opacity:.75}
.rail-status{flex:none;display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.rail-lamp{width:7px;height:7px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 3px rgba(255,107,74,.18)}

.masthead{display:grid;grid-template-columns:minmax(90px,1fr) auto minmax(90px,1fr);align-items:center;gap:clamp(10px,2vw,24px);width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto;padding:clamp(16px,3vw,32px) 0}
.masthead-side{display:flex;align-items:center;gap:clamp(8px,1.2vw,14px)}
.masthead-side--end{justify-content:flex-end}
.penguin-mark{display:inline-flex;color:var(--mint)}
.penguin-mark svg{width:clamp(34px,4.4vw,50px);height:auto;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.masthead-lockup{position:relative;display:inline-flex;flex-direction:column;align-items:center;gap:8px;padding:0 10px;text-align:center}
.masthead-lockup::after{content:"";position:absolute;left:10px;right:10px;bottom:-8px;height:3px;background:var(--mint);transform:scaleX(0);transform-origin:center;transition:transform .3s ease}
.masthead-lockup:hover::after,.masthead-lockup:focus-visible::after{transform:scaleX(1)}
.masthead-lockup__cn{font-family:var(--font-display);font-weight:900;font-size:clamp(1.7rem,4.8vw,3.4rem);line-height:1;letter-spacing:.05em;font-stretch:condensed;color:var(--paper)}
.masthead-lockup__en{font-family:var(--font-mono);font-size:clamp(.58rem,1.2vw,.72rem);letter-spacing:.32em;text-transform:uppercase;color:var(--mint)}
.utility{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ash);border-bottom:2px solid transparent;padding-bottom:2px;transition:color .2s ease,border-color .2s ease}
.utility:hover{color:var(--mint);border-color:var(--mint)}
.utility--accent{color:var(--coral)}
.utility--accent:hover{color:var(--paper);border-color:var(--coral)}
.device-pill{display:inline-flex;align-items:center;gap:6px;padding:3px 8px;border:1px solid var(--steel);font-family:var(--font-mono);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ash);white-space:nowrap}
.device-pill i{width:6px;height:6px;border-radius:50%;background:var(--mint)}

/* ---------- 导航带 ---------- */
.nav-band{position:relative;display:block;padding:0 var(--gutter);border-top:2px solid var(--steel);border-bottom:2px solid var(--steel);background:repeating-linear-gradient(90deg,rgba(42,93,122,.85) 0 1px,transparent 1px 26px) bottom/100% 6px no-repeat,var(--ink-2)}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center;align-items:stretch;gap:clamp(0px,.8vw,8px);width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto}
.nav-item{display:block}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:14px clamp(9px,1.4vw,18px);font-family:var(--font-body);font-size:.94rem;font-weight:700;letter-spacing:.08em;color:var(--paper);transition:color .2s ease,background-color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--mint);transform:scaleX(0);transform-origin:left;transition:transform .28s cubic-bezier(.2,.8,.2,1)}
.nav-link:hover{color:var(--mint)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link--featured{color:var(--mint)}
.nav-link--featured::before{content:"";width:6px;height:6px;margin-right:8px;background:var(--mint);flex:none}
.nav-link[aria-current="page"]{background:var(--mint);color:var(--score)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--coral)}
.nav-toggle{display:none}
.nav-toggle__label{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.18em;text-transform:uppercase}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:20px}
.nav-toggle__bars i{display:block;height:2px;background:var(--mint);transition:transform .2s ease,opacity .2s ease}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:clamp(48px,8vw,96px);padding-bottom:clamp(32px,5vw,64px);background:var(--ink);border-top:3px solid var(--steel)}
.footer-board{display:grid;gap:clamp(18px,2.4vw,30px);width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto;padding:clamp(22px,3.4vw,44px);background:var(--ink-2);border:2px solid var(--steel);box-shadow:var(--shadow-hard)}
.footer-sign{display:flex;align-items:baseline;flex-wrap:wrap;gap:.5em;font-family:var(--font-display);font-weight:900;font-size:clamp(1.3rem,3vw,2.1rem);line-height:1.1;letter-spacing:.06em;color:var(--paper)}
.footer-sign__sub{font-family:var(--font-mono);font-size:clamp(.7rem,1.4vw,.82rem);font-weight:400;letter-spacing:.2em;text-transform:uppercase;color:var(--mint)}
.footer-shortcuts{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.footer-shortcut{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:2px solid var(--steel);background:var(--ink);font-family:var(--font-mono);font-size:.78rem;letter-spacing:.05em;color:var(--paper);transition:border-color .2s ease,background-color .2s ease,transform .2s ease,box-shadow .2s ease}
.footer-shortcut::after{content:"→";color:var(--mint);transition:transform .2s ease}
.footer-shortcut:hover{border-color:var(--mint);background:var(--ink-3);transform:translate(-2px,-2px);box-shadow:var(--shadow-soft)}
.footer-shortcut:hover::after{transform:translateX(4px)}
.footer-grid{display:grid;gap:clamp(18px,2.4vw,32px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));align-items:start}
.footer-nav{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.footer-nav a{font-size:.92rem;color:var(--paper);border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease}
.footer-nav a:hover{color:var(--mint);border-color:var(--mint)}
.footer-contact{display:grid;gap:6px;font-style:normal;font-family:var(--font-mono);font-size:.8rem;line-height:1.75;color:var(--ash)}
.footer-note{max-width:66ch;padding-left:14px;border-left:3px solid var(--coral);font-size:.82rem;line-height:1.75;color:var(--ash)}
.footer-icp{padding-top:14px;border-top:1px solid var(--line-soft);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--ash)}

/* ---------- 断点 ---------- */
@media (max-width:1120px){
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:880px){
  .masthead{grid-template-columns:auto 1fr auto;padding-block:14px}
  .masthead-side--end{flex-direction:column;align-items:flex-end;gap:6px}
  .utility{font-size:.64rem}
  .nav-band{padding-inline:var(--gutter)}
  .nav-toggle{display:flex;align-items:center;gap:10px;width:min(calc(100% - var(--gutter) * 2),var(--wrap));margin-inline:auto;padding:14px 0;color:var(--paper)}
  .nav-list{display:none;flex-direction:column;align-items:stretch;width:min(calc(100% - var(--gutter) * 2),var(--wrap));padding-bottom:12px}
  .nav-band[data-open] .nav-list{display:flex}
  .nav-band[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-band[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
  .nav-band[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .nav-link{width:100%;justify-content:flex-start;padding:12px 4px;border-bottom:1px solid var(--line-soft);font-size:1rem}
  .nav-link::after{display:none}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:620px){
  body{font-size:16px}
  .header-rail{font-size:.6rem;letter-spacing:.12em}
  .rail-ticks{display:none}
  .masthead{grid-template-columns:auto 1fr;grid-template-areas:"mark lockup" "tools tools";justify-items:start;gap:12px}
  .masthead-side--start{grid-area:mark}
  .masthead-lockup{grid-area:lockup;align-items:flex-start;text-align:left;padding:0}
  .masthead-side--end{grid-area:tools;flex-direction:row;align-items:center;justify-content:flex-start;width:100%;padding-top:10px;border-top:1px solid var(--line-soft)}
  .masthead-lockup__cn{letter-spacing:.03em}
  .masthead-lockup__en{letter-spacing:.2em}
  .device-pill{display:none}
  .footer-board{padding:18px}
  .footer-shortcut{font-size:.72rem;padding:12px}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .btn:hover,.footer-shortcut:hover{transform:none}
}