:root{
  --ink:#09090c;
  --panel:#121218;
  --panel2:#1a1a23;
  --line:#2b2b38;
  --tx:#ece8ea;
  --mute:#9d98a3;
  --rose:#e8326b;
  --rose2:#ff7a9e;
  --wine:#7a1236;
  --wrap:1120px;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.8;color:var(--tx);
  background:radial-gradient(900px 420px at 85% -80px,rgba(232,50,107,.22),transparent 70%),
  radial-gradient(700px 360px at -5% 12%,rgba(122,18,54,.28),transparent 70%),var(--ink);
  min-height:100vh;display:flex;flex-direction:column}
img{max-width:100%;height:auto;display:block}
a{color:var(--rose2);text-decoration:none}
a:hover{color:#fff;text-decoration:underline}
.wrap{width:min(100% - 2rem,var(--wrap));margin-inline:auto}

/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(9,9,12,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(232,50,107,.35)}
.top-in{display:flex;align-items:center;justify-content:space-between;height:62px;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;color:#fff;font-weight:700;font-size:1.2rem;letter-spacing:.04em}
.brand:hover{text-decoration:none;color:var(--rose2)}
.brand i{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--rose),var(--wine));font-style:normal;font-size:1rem;color:#fff}
.menu ul{display:flex;gap:.3rem 1.5rem;list-style:none;margin:0;padding:0}
.menu a{color:var(--mute);font-size:.95rem;padding:.35rem 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a.on{color:#fff;border-bottom-color:var(--rose);text-decoration:none}
.burger{display:none;width:44px;height:44px;padding:11px 10px;flex-direction:column;justify-content:space-between;
  background:var(--panel);border:1px solid var(--line);border-radius:10px;cursor:pointer}
.burger span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform .25s,opacity .25s}
.burger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ads (from cdn.html pattern, dark skin) */
#applist{background:rgba(26,26,35,.7);border-bottom:1px solid var(--line);padding:.6rem .75rem .8rem}
.applist-title{text-align:center;font-size:.8rem;letter-spacing:.08em;color:var(--mute);margin-bottom:.4rem}
#ads{display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;background:transparent;margin:10px 0}
#ads>div{display:flex;flex-direction:column;align-items:center;width:70px;box-sizing:border-box}
#ads figure{margin:0;display:flex;flex-direction:column;align-items:center}
#ads img{width:65px;height:65px;object-fit:cover;border-radius:18px;box-shadow:0 6px 18px rgba(0,0,0,.4);
  transition:transform 180ms ease,box-shadow 180ms ease;display:block;border:none;background:#fff}
#ads a{display:inline-block;text-decoration:none;border-radius:15px}
#ads img:hover{transform:translateY(-4px) scale(1.04);box-shadow:0 10px 24px rgba(232,50,107,.35)}
#ads figcaption,#ads .caption{height:15px;font-size:11px;color:var(--mute);text-align:center;max-width:100px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px}

/* hero */
.hero{padding:3.2rem 0 2.6rem;border-bottom:1px solid var(--line)}
.hero-row{display:grid;grid-template-columns:1.15fr .85fr;gap:2.4rem;align-items:center}
.tag{display:inline-block;font-size:.8rem;letter-spacing:.12em;color:var(--rose2);border:1px solid rgba(232,50,107,.5);
  border-radius:99px;padding:.15rem .8rem;margin-bottom:1rem}
.hero h1{font-size:clamp(1.8rem,4.2vw,2.7rem);line-height:1.3;margin:0 0 1rem;color:#fff}
.hero h1 em{font-style:normal;color:var(--rose)}
.hero p{color:var(--mute);margin:0 0 1.5rem}
.acts{display:flex;flex-wrap:wrap;gap:.7rem}
.btn{display:inline-block;padding:.65rem 1.4rem;border-radius:99px;font-weight:600;font-size:.95rem;border:1px solid transparent}
.btn:hover{text-decoration:none}
.btn-fill{background:linear-gradient(90deg,var(--rose),#c01b55);color:#fff}
.btn-fill:hover{color:#fff;filter:brightness(1.12)}
.btn-line{border-color:var(--line);color:var(--tx)}
.btn-line:hover{border-color:var(--rose);color:var(--rose2)}
.hero-pic{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--panel);
  box-shadow:0 18px 50px rgba(232,50,107,.16);max-height:460px}
.hero-pic img{width:100%;height:100%;max-height:460px;object-fit:cover;object-position:top}

/* toc */
.sec{padding:2.8rem 0;border-bottom:1px solid var(--line)}
.sec h2{font-size:clamp(1.35rem,3vw,1.8rem);line-height:1.4;margin:0 0 .9rem;color:#fff;
  padding-left:.9rem;border-left:4px solid var(--rose)}
.sec h3{font-size:1.15rem;margin:1.6rem 0 .5rem;color:#ffd3df}
.sec p{margin:0 0 1rem}
.lead{color:var(--mute)}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1.3rem 1.5rem}
.toc h2{border:0;padding:0;font-size:1.1rem;margin:0 0 .8rem;color:var(--rose2)}
.toc ol{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:.45rem 1.6rem;counter-reset:t}
.toc li{counter-increment:t;display:flex;gap:.6rem;align-items:baseline}
.toc li::before{content:counter(t,decimal-leading-zero);color:var(--rose);font-weight:700;font-size:.85rem}
.toc a{color:var(--tx)}
.toc a:hover{color:var(--rose2)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem;margin:1.4rem 0 0}
.card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:rgba(232,50,107,.65)}
.card a{display:block;color:inherit}
.card a:hover{text-decoration:none}
.card img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:top}
.card b{position:absolute;top:.6rem;left:.6rem;background:var(--rose);color:#fff;font-size:.78rem;
  padding:.05rem .6rem;border-radius:99px}
.card div{padding:.85rem 1rem 1.05rem}
.card h3{margin:0 0 .3rem;font-size:1.02rem;color:#fff}
.card p{margin:0;font-size:.88rem;color:var(--mute);line-height:1.65}

/* prose blocks */
.note{background:linear-gradient(90deg,rgba(232,50,107,.14),rgba(232,50,107,.03));border:1px solid rgba(232,50,107,.35);
  border-radius:12px;padding:1rem 1.25rem;margin:1.3rem 0}
.note p:last-child{margin:0}
.fig{margin:1.4rem 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel);max-width:380px}
.fig figcaption{padding:.6rem .9rem;font-size:.85rem;color:var(--mute)}
.fig img{width:100%}
.prose ul,.prose ol{padding-left:1.3rem;margin:0 0 1.2rem}
.prose li{margin-bottom:.45rem}
.prose li::marker{color:var(--rose)}
.tbl{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.93rem}
.tbl th,.tbl td{border:1px solid var(--line);padding:.6rem .8rem;text-align:left;vertical-align:top}
.tbl th{background:var(--panel2);color:#ffd3df}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:.8rem 1.1rem;margin-bottom:.7rem}
.faq summary{cursor:pointer;font-weight:600;color:#fff}
.faq details[open] summary{color:var(--rose2);margin-bottom:.5rem}
.faq p{margin:0;color:var(--mute)}
.reads{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.8rem;margin-top:1.2rem}
.reads a{display:block;padding:.9rem 1.1rem;background:var(--panel);border:1px solid var(--line);border-radius:10px;color:var(--tx)}
.reads a:hover{border-color:var(--rose);color:var(--rose2);text-decoration:none}

/* inner pages */
.phead{padding:2.4rem 0 1.5rem;border-bottom:1px solid var(--line)}
.phead h1{font-size:clamp(1.55rem,3.6vw,2.2rem);margin:0 0 .6rem;color:#fff}
.crumb{font-size:.85rem;color:var(--mute);margin-bottom:.7rem}
.crumb a{color:var(--mute)}
.crumb a:hover{color:var(--rose2)}
.crumb s{text-decoration:none;margin:0 .4rem;opacity:.5}
.doc{max-width:860px}
.err{min-height:55vh;display:grid;place-items:center;text-align:center;padding:3rem 0}
.err .n{font-size:clamp(4.5rem,13vw,8rem);font-weight:800;line-height:1;margin:0;
  background:linear-gradient(135deg,var(--rose),var(--wine));-webkit-background-clip:text;background-clip:text;color:transparent}
.err h1{font-size:1.5rem;margin:.4rem 0 .8rem}
.err p{color:var(--mute);max-width:420px;margin:0 auto 1.4rem}

/* footer */
main{flex:1}
.foot{background:var(--panel);border-top:1px solid var(--line);padding:2.4rem 0 1.4rem;margin-top:2rem}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem;margin-bottom:1.6rem}
.foot p{color:var(--mute);font-size:.9rem;margin:0 0 .6rem}
.foot h4{margin:0 0 .7rem;font-size:.95rem;color:#fff}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:.4rem}
.foot a{color:var(--mute);font-size:.9rem}
.foot a:hover{color:var(--rose2)}
.copy{border-top:1px solid var(--line);padding-top:1.1rem;text-align:center;color:var(--mute);font-size:.83rem}

@media(max-width:860px){
  .burger{display:flex}
  .menu{position:absolute;left:0;right:0;top:62px;background:rgba(9,9,12,.98);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s ease}
  .menu.open{max-height:340px}
  .menu ul{flex-direction:column;gap:0;padding:.6rem 1rem 1rem}
  .menu li{border-bottom:1px solid var(--line)}
  .menu a{display:block;padding:.85rem .2rem;border-bottom:0}
  .hero-row{grid-template-columns:1fr}
  .hero-pic{order:-1;max-height:300px}
  .hero-pic img{max-height:300px}
  .toc ol{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr;gap:1.3rem}
}
@media(max-width:520px){
  .cards{grid-template-columns:1fr}
  .hero{padding:2rem 0 1.8rem}
  .sec{padding:2rem 0}
  .tbl{font-size:.85rem}
}