:root{
  --base:#f5f5f7;--o1:#c7ccd6;--o2:#dbe8b0;--o3:#d9d9de;--o4:#cfd6e6;
  --text:#1d1d1f;--muted:#6e6e73;
  --t1:rgba(255,255,255,.66);--t2:rgba(255,255,255,.30);
  --edge:#fff;--edge2:rgba(255,255,255,.4);--spec:rgba(255,255,255,.95);
  --sh:0 8px 30px rgba(0,0,0,.07);--acc:#cdf545;--ink:#0d0d0c;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --base:#000;--o1:#2b2b30;--o2:#2a3a10;--o3:#1f1f23;--o4:#1a2236;
  --text:#f5f5f7;--muted:#86868b;--t1:rgba(255,255,255,.12);--t2:rgba(255,255,255,.03);
  --edge:rgba(255,255,255,.35);--edge2:rgba(255,255,255,.04);--spec:rgba(255,255,255,.2);--sh:0 8px 30px rgba(0,0,0,.5);--acc:#cdf545;--ink:#0d0d0c}}
:root[data-theme="dark"]{
  --base:#000;--o1:#2b2b30;--o2:#2a3a10;--o3:#1f1f23;--o4:#1a2236;
  --text:#f5f5f7;--muted:#86868b;--t1:rgba(255,255,255,.12);--t2:rgba(255,255,255,.03);
  --edge:rgba(255,255,255,.35);--edge2:rgba(255,255,255,.04);--spec:rgba(255,255,255,.2);--sh:0 8px 30px rgba(0,0,0,.5);--acc:#cdf545;--ink:#0d0d0c}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 80px);scroll-behavior:smooth;height:100%}
*{box-sizing:border-box}
body{margin:0;min-height:100%;background:var(--base);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.55;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

/* wallpaper */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(40px);animation:drift 20s ease-in-out infinite alternate}
.bg .orb:nth-child(1){width:52vw;height:52vw;background:radial-gradient(circle,var(--o1),transparent 68%);top:-14vw;left:-10vw}
.bg .orb:nth-child(2){width:46vw;height:46vw;background:radial-gradient(circle,var(--o2),transparent 68%);top:22vh;right:-12vw;animation-delay:-7s}
.bg .orb:nth-child(3){width:38vw;height:38vw;background:radial-gradient(circle,var(--o3),transparent 68%);bottom:-12vw;left:8vw;animation-delay:-12s}
.bg .orb:nth-child(4){width:30vw;height:30vw;background:radial-gradient(circle,var(--o4),transparent 68%);bottom:10vh;right:22vw;animation-delay:-4s}
@keyframes drift{to{transform:translate(7vw,6vh) scale(1.12)}}

/* liquid glass */
.glass{position:relative;border-radius:30px;isolation:isolate;
  background:linear-gradient(140deg,var(--t1),var(--t2));
  -webkit-backdrop-filter:blur(22px) saturate(190%) brightness(1.06);backdrop-filter:blur(22px) saturate(190%) brightness(1.06);
  box-shadow:inset 0 1.5px 1px var(--edge),inset 0 -1px 1px var(--edge2),inset 0 0 22px rgba(255,255,255,.12),var(--sh);
  transition:transform .5s cubic-bezier(.34,1.56,.64,1),box-shadow .3s}
.glass::before{content:"";position:absolute;inset:0;border-radius:inherit;z-index:-1;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(220px circle at var(--x,50%) var(--y,0%),var(--spec),transparent 65%)}
.glass:hover::before{opacity:1}
.glass::after{content:"";position:absolute;inset:0;border-radius:inherit;padding:1.2px;pointer-events:none;
  background:linear-gradient(135deg,var(--edge),var(--edge2) 35%,var(--edge2) 65%,var(--edge));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.lift:hover{transform:translateY(-6px) scale(1.025)}
.tint{background:var(--acc);color:var(--ink)}

.wrap{position:relative;z-index:1;max-width:1000px;margin:0 auto;padding:0 22px}

/* top nav */
.navw{position:fixed;top:0;left:0;right:0;z-index:10;display:flex;justify-content:center;padding:calc(env(safe-area-inset-top,0px) + 14px) 14px 0;pointer-events:none}
.nav{pointer-events:auto;display:flex;align-items:center;gap:4px;padding:7px;border-radius:99px}
.nav b{padding:0 16px 0 14px;font-weight:700}
.nav a,.nav button{padding:8px 16px;border-radius:99px;border:0;background:none;font-size:14px;cursor:pointer;color:var(--muted);transition:all .25s}
.nav a:hover,.nav button:hover{color:var(--text);background:var(--t1)}

/* hero */
.hero{text-align:center;padding:170px 0 70px}
.hero .hi{display:inline-block;padding:7px 18px;border-radius:99px;font-size:14px;color:var(--muted);margin-bottom:26px}
h1{font-size:clamp(46px,10vw,112px);line-height:1.02;letter-spacing:-.045em;font-weight:700;margin:0}
h1 span{color:var(--ink);background:var(--acc);padding:0 .1em;border-radius:.14em}
.card-hero{max-width:560px;margin:38px auto 0;padding:26px 28px}
.card-hero p{margin:0 0 20px;font-size:17px;color:var(--muted)}
.btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btn{padding:12px 26px;border-radius:99px;font-weight:600;font-size:15px;cursor:pointer;border:0}

/* sections */
section{padding:80px 0 0;position:relative}
.sec-orb{position:absolute;z-index:0;width:280px;height:280px;filter:blur(30px);opacity:.9}
h2{font-size:clamp(28px,5vw,48px);letter-spacing:-.035em;margin:0 0 6px;font-weight:700;position:relative}
.sub{color:var(--muted);margin:0 0 34px;position:relative}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;position:relative;z-index:1}
.w{display:block;padding:26px;min-height:190px}
.ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:14px;font-weight:600;color:var(--muted);margin-bottom:34px;background:var(--t1);box-shadow:inset 0 1px 1px var(--edge),0 1px 6px rgba(0,0,0,.06)}
.w h3{margin:0 0 3px;font-size:22px;letter-spacing:-.02em}
.w p{margin:0;color:var(--muted);font-size:15px}

/* segmented control */
.seg{position:relative;display:grid;grid-template-columns:repeat(3,1fr);width:min(100%,380px);padding:5px;border-radius:99px;margin-bottom:18px;z-index:1}
.seg .thumb{position:absolute;top:5px;bottom:5px;left:5px;width:calc((100% - 10px)/3);border-radius:99px;
  background:linear-gradient(140deg,rgba(255,255,255,.75),rgba(255,255,255,.35));box-shadow:0 2px 10px rgba(0,0,0,.14),inset 0 1px 1px #fff;
  transform:translateX(calc(var(--i,0)*100%));transition:transform .5s cubic-bezier(.34,1.4,.64,1)}
:root[data-theme="dark"] .seg .thumb{background:linear-gradient(140deg,rgba(255,255,255,.3),rgba(255,255,255,.1))}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .seg .thumb{background:linear-gradient(140deg,rgba(255,255,255,.3),rgba(255,255,255,.1))}}
.seg button{position:relative;z-index:1;border:0;background:none;padding:9px 0;font-size:14px;font-weight:600;cursor:pointer;color:var(--text);opacity:.65;transition:opacity .2s}
.seg button.on{opacity:1}
.panel{padding:30px 32px;position:relative;z-index:1;font-size:18px;min-height:150px}
.panel div{display:none}.panel div.on{display:block;animation:fi .5s}
@keyframes fi{from{opacity:0;transform:translateY(8px)}}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{padding:5px 15px;border-radius:99px;background:var(--t1);font-size:14px;box-shadow:inset 0 1px 1px var(--edge)}

.contact{text-align:center;padding:56px 24px;margin-top:80px;position:relative;z-index:1}
.contact h2{margin-bottom:22px}
footer{position:relative;z-index:1;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:30px 6px 46px;color:var(--muted);font-size:14px}
footer a:hover{color:var(--text)}
@media (max-width:720px){.grid{grid-template-columns:1fr}.nav a{display:none}.hero{padding-top:130px}.nav b{padding-right:10px}}
@media (prefers-reduced-motion:reduce){.orb{animation:none}.glass,.seg .thumb{transition:none}}
.hero{padding:150px 0 40px}
h1{font-size:clamp(44px,9vw,96px)}
.stats{margin-top:26px;color:var(--muted);font-size:15px}
.stats b{color:var(--text);font-weight:600}
.search{display:flex;align-items:center;gap:10px;max-width:520px;margin:30px auto 0;padding:5px 22px;border-radius:99px;text-align:left}
.search span{color:var(--muted)}
.search input{flex:1;min-width:0;background:none;border:0;outline:0;font:inherit;font-size:16px;color:var(--text);padding:12px 0}
.search input::placeholder{color:var(--muted)}
.tag{display:inline-block;padding:3px 12px;border-radius:99px;font-size:12px;font-weight:600;background:var(--t1);color:var(--muted);box-shadow:inset 0 1px 1px var(--edge);align-self:flex-start}
.tag.acc{background:var(--acc);color:var(--ink);box-shadow:none}
.feat{display:grid;grid-template-columns:1.25fr 1fr;gap:28px;padding:34px;margin-top:34px;align-items:center}
.feat h2{font-size:clamp(26px,4vw,42px);margin:16px 0 12px;line-height:1.15}
.feat p{margin:0 0 22px;color:var(--muted);font-size:17px}
.feat .go{font-weight:600;color:var(--ink);background:var(--acc);padding:7px 18px;border-radius:99px;display:inline-block}
.cover{aspect-ratio:4/3;border-radius:22px;display:grid;place-items:center;font-size:54px;color:var(--muted);
  background:radial-gradient(circle at 30% 25%,var(--o2),transparent 70%),radial-gradient(circle at 75% 80%,var(--o1),transparent 70%),var(--t1);
  box-shadow:inset 0 1px 1px var(--edge),0 1px 8px rgba(0,0,0,.06)}
.seg{width:min(100%,440px);grid-template-columns:repeat(var(--n,3),1fr)}
.seg .thumb{width:calc((100% - 10px)/var(--n,3))}
.w{display:flex;flex-direction:column;min-height:200px}
.w h3{margin:16px 0 6px}
.w .meta{margin-top:auto;padding-top:20px;display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:40px 0;margin:0}
.about{padding:30px 34px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;position:relative;z-index:1}
.about p{margin:0;max-width:32em;font-size:17px}
.about .links{display:flex;gap:10px;flex-wrap:wrap}
@media (max-width:720px){.feat{grid-template-columns:1fr;padding:26px}.cover{aspect-ratio:16/9;order:-1}.hero{padding-top:120px}}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--acc);margin-right:8px;box-shadow:0 0 0 1px rgba(0,0,0,.18),0 0 8px var(--acc)}
::selection{background:var(--acc);color:var(--ink)}

/* ====== 内容页（文章 / 项目 / 分享）====== */
.nav .back{color:var(--text)}
@media (max-width:720px){.nav a.back{display:inline-block}}
.page{padding-top:120px}
.article{padding:40px 44px;position:relative;z-index:1}
.article .head{margin-bottom:30px}
.article h1{font-size:clamp(32px,6vw,52px);line-height:1.12;letter-spacing:-.035em;margin:16px 0 14px}
.article .meta{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:14px}
.prose{font-size:17px;line-height:1.8}
.prose h2{font-size:clamp(22px,3.4vw,28px);letter-spacing:-.02em;margin:36px 0 10px}
.prose h3{font-size:19px;margin:26px 0 8px}
.prose p,.prose ul,.prose ol{margin:0 0 16px}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:4px 0}
.prose a{text-decoration:underline;text-decoration-color:var(--acc);text-decoration-thickness:2px;text-underline-offset:3px}
.prose blockquote{margin:0 0 16px;padding:10px 18px;border-left:3px solid var(--acc);color:var(--muted);background:var(--t2);border-radius:0 14px 14px 0}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;padding:2px 6px;border-radius:6px;background:var(--t1)}
.prose pre{margin:0 0 16px;padding:16px 18px;border-radius:16px;background:var(--t1);overflow-x:auto;box-shadow:inset 0 1px 1px var(--edge)}
.prose pre code{padding:0;background:none}
.prose img{max-width:100%;height:auto;border-radius:16px}
.prose table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:15px}
.prose th,.prose td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--t1)}
.prose hr{border:0;height:1px;background:var(--t1);margin:30px 0}
.tool{margin:0 0 20px;padding:20px;border-radius:22px}
.tool textarea{width:100%;min-height:160px;resize:vertical;border:0;outline:0;background:none;font:inherit;font-size:16px;color:var(--text);line-height:1.7}
.tool textarea::placeholder{color:var(--muted)}
.nums{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:0 0 16px}
.nums div{padding:16px;border-radius:20px;text-align:center}
.nums b{display:block;font-size:28px;letter-spacing:-.02em}
.nums span{font-size:13px;color:var(--muted)}
@media (max-width:720px){.article{padding:28px 22px}.page{padding-top:96px}.nums{grid-template-columns:repeat(2,1fr)}}

/* 外观切换按钮：自动 / 浅色 / 深色 图标 */
.nav #theme{display:grid;place-items:center;padding:8px 12px}
#theme svg{width:17px;height:17px;display:block}