*,*::before,*::after{box-sizing:border-box}
:root{
--ink:#171f26;
--ink-2:#1d2731;
--ink-3:#121a20;
--sky:#c8e0f4;
--rose:#f5e0e8;
--fg:#e3ebf2;
--muted:#94a7b7;
--r:10px;
--r-lg:16px;
--sh-out:-5px -5px 15px rgba(200,224,244,.07),5px 5px 15px rgba(0,0,0,.55);
--sh-in:inset -3px -3px 8px rgba(200,224,244,.05),inset 3px 3px 8px rgba(0,0,0,.62);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
margin:0;
overflow-x:hidden;
font-family:'Inter','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
font-size:17px;
line-height:1.75;
color:var(--fg);
background:
radial-gradient(900px 620px at 88% -8%,rgba(245,224,232,.12),transparent 62%),
radial-gradient(760px 520px at 2% 2%,rgba(200,224,244,.14),transparent 58%),
var(--ink);
background-attachment:fixed;
-webkit-font-smoothing:antialiased;
}
main{display:block}
h1,h2,h3{letter-spacing:-.012em}
p{margin:0 0 1.1em}
a{color:inherit}
img{max-width:100%}
ol,ul{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--rose);outline-offset:2px}

.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 clamp(14px,4vw,28px)}

/* 顶部工具栏 */
.bar{
position:sticky;top:0;z-index:60;
display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;
padding:12px clamp(14px,3vw,28px);
background:rgba(23,31,38,.8);
-webkit-backdrop-filter:blur(16px) saturate(1.15);
backdrop-filter:blur(16px) saturate(1.15);
box-shadow:0 12px 28px rgba(0,0,0,.4);
}
.brand{
display:inline-flex;align-items:center;gap:10px;min-height:44px;
text-decoration:none;color:var(--sky);font-weight:500;letter-spacing:.05em;font-size:16px;
max-width:100%;min-width:0;
}
.brand-mark{width:32px;height:32px;border-radius:9px;object-fit:cover;box-shadow:var(--sh-out);flex:none}
.brand-dot{
width:18px;height:18px;border-radius:50%;flex:none;
background:linear-gradient(145deg,var(--sky),var(--rose));
box-shadow:var(--sh-out);
}
.brand-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.find{justify-self:end;display:flex;min-width:0;grid-column:2}
.find-input{
width:clamp(110px,26vw,240px);height:44px;min-width:0;
border:0;border-radius:var(--r);padding:0 14px;
font-family:inherit;font-size:16px;color:var(--fg);
background:var(--ink-3);box-shadow:var(--sh-in);
outline:none;transition:box-shadow .18s ease;
}
.find-input::placeholder{color:var(--muted)}
.find-input:focus{box-shadow:var(--sh-in),0 0 0 2px rgba(200,224,244,.3)}

.burger{
display:inline-flex;align-items:center;gap:9px;
min-height:44px;padding:0 14px;border:0;border-radius:var(--r);
font-family:inherit;font-size:16px;color:var(--fg);
background:linear-gradient(145deg,#1f2a34,#141c23);
box-shadow:var(--sh-out);
cursor:pointer;
transition:transform .15s ease,box-shadow .15s ease;
}
.burger:active{transform:scale(.97);box-shadow:var(--sh-in)}
.burger-icon{display:grid;gap:4px}
.burger-bar{display:block;width:17px;height:2px;border-radius:2px;background:var(--sky)}

/* 全屏遮罩菜单 */
.drawer{
position:fixed;inset:0;z-index:80;
display:grid;place-content:center;
padding:88px 22px 40px;overflow:auto;
background:rgba(13,18,23,.86);
-webkit-backdrop-filter:blur(18px);
backdrop-filter:blur(18px);
opacity:0;visibility:hidden;
transition:opacity .26s ease,visibility .26s ease;
}
html.menu-open .drawer{opacity:1;visibility:visible}
html.menu-open{overflow:hidden}
.drawer-nav{width:min(560px,86vw)}
.drawer-list{display:grid;gap:12px;counter-reset:step}
.drawer-list li a{
display:flex;align-items:center;gap:14px;min-height:54px;
padding:12px 18px;border-radius:12px;text-decoration:none;
font-size:19px;color:var(--fg);
background:linear-gradient(145deg,#1e2832,#141b22);
box-shadow:var(--sh-out);
transition:transform .16s ease,box-shadow .16s ease;
}
.drawer-list li a::before{
counter-increment:step;content:counter(step,decimal-leading-zero);
font-size:12px;letter-spacing:.14em;color:var(--sky);opacity:.72;
}
.drawer-list li a:hover{transform:translateX(5px)}
.drawer-list li a:active{transform:scale(.985);box-shadow:var(--sh-in)}

/* 首屏 */
.hero{
position:relative;
display:grid;grid-template-columns:1.05fr .95fr;
gap:clamp(20px,4vw,54px);align-items:center;
min-height:70vh;padding:clamp(36px,6vw,84px) 0;
}
.hero::before{
content:'';position:absolute;inset:0;pointer-events:none;opacity:.5;
background-image:radial-gradient(rgba(200,224,244,.2) 1px,transparent 1px);
background-size:24px 24px;
-webkit-mask-image:radial-gradient(circle at 32% 42%,#000,transparent 74%);
mask-image:radial-gradient(circle at 32% 42%,#000,transparent 74%);
}
.hero-copy{position:relative;z-index:1}
.hero-title{
margin:0 0 18px;font-size:clamp(30px,5vw,54px);line-height:1.18;font-weight:500;
color:var(--sky);
background:linear-gradient(118deg,var(--sky) 12%,var(--rose) 92%);
-webkit-background-clip:text;background-clip:text;
-webkit-text-fill-color:transparent;
}
.hero-lead{max-width:46ch;color:var(--muted);font-size:17px;margin-bottom:26px}
.press{
display:inline-flex;align-items:center;justify-content:center;
min-height:48px;padding:0 26px;border-radius:12px;
text-decoration:none;font-weight:600;letter-spacing:.05em;color:#12191f;
background:linear-gradient(145deg,var(--sky),var(--rose));
box-shadow:-4px -4px 12px rgba(245,224,232,.16),6px 6px 18px rgba(0,0,0,.55);
transition:transform .15s ease,box-shadow .15s ease;
}
.press:active{transform:scale(.97);box-shadow:inset 3px 3px 10px rgba(0,0,0,.38)}

.hero-art{
position:relative;z-index:1;margin:0;
display:grid;place-items:center;
aspect-ratio:4/3;padding:10px;border-radius:var(--r-lg);overflow:hidden;
background:linear-gradient(145deg,#1e2831,#131a20);
box-shadow:-8px -8px 24px rgba(200,224,244,.08),10px 10px 30px rgba(0,0,0,.6);
}
.hero-art img{width:100%;height:100%;object-fit:cover;border-radius:var(--r);display:block;will-change:transform}
.hero-art.is-plain .orb{
width:58%;aspect-ratio:1;border-radius:50%;display:block;
background:linear-gradient(145deg,var(--sky),var(--rose));
box-shadow:inset -8px -8px 22px rgba(0,0,0,.26),inset 8px 8px 22px rgba(255,255,255,.42),0 14px 32px rgba(0,0,0,.5);
will-change:transform;
}

/* 正文与右侧栏 */
.split{
display:grid;grid-template-columns:minmax(0,1fr) 280px;
gap:clamp(20px,3vw,38px);align-items:start;
padding-bottom:64px;
}
.prose{min-width:0}
.prose > article{
position:relative;
margin:0 0 30px;padding:clamp(20px,3vw,38px);
border-radius:var(--r);
background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
box-shadow:var(--sh-out);
-webkit-backdrop-filter:blur(10px);
backdrop-filter:blur(10px);
scroll-margin-top:96px;
transition:box-shadow .3s ease;
}
.prose > article:target{box-shadow:0 0 0 2px rgba(245,224,232,.32),var(--sh-out)}
.prose > article.is-hidden{display:none}
.prose h2{
margin:0;font-size:clamp(21px,2.5vw,27px);line-height:1.36;font-weight:600;color:#e7f0f8;
}
.prose h3{margin:1.4em 0 .5em;font-size:19px;font-weight:600;color:#dbe8f2}
hr{
height:6px;border:0;border-radius:6px;margin:14px 0 20px;
background:rgba(0,0,0,.3);box-shadow:var(--sh-in);
}
.prose p{color:#cdd9e3}
.prose ul,.prose ol{list-style:disc;padding-left:1.25em;margin:0 0 1.2em;color:#cdd9e3}
.prose ol{list-style:decimal}
.prose li{margin:.36em 0}
.prose strong{color:#fff;font-weight:600}
.prose a{color:var(--rose);text-underline-offset:3px}
.prose img{border-radius:var(--r);height:auto}
.prose blockquote{
margin:1.2em 0;padding:14px 18px;border:0;border-radius:var(--r);
background:rgba(200,224,244,.06);box-shadow:var(--sh-in);color:#dbe7f1;
}
.prose table{width:100%;border-collapse:collapse;font-size:16px}
.prose th,.prose td{padding:8px 10px;text-align:left;border-bottom:1px solid rgba(200,224,244,.12)}

.side{
position:sticky;top:92px;
padding:18px;border-radius:12px;
background:linear-gradient(145deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
box-shadow:var(--sh-out);
-webkit-backdrop-filter:blur(10px);
backdrop-filter:blur(10px);
}
.side-title{
margin:0;font-size:15px;font-weight:600;letter-spacing:.16em;color:var(--sky);
}
.side hr{height:4px;margin:10px 0 12px}
.side-list{display:grid;gap:2px}
.side-list a{
display:block;padding:9px 6px;min-height:40px;
font-size:15px;line-height:1.5;color:#b9c9d6;text-decoration:none;
border-radius:8px;border-bottom:1px solid rgba(200,224,244,.08);
transition:color .15s ease,padding-left .15s ease;
}
.side-list a:hover{color:#fff;padding-left:10px}

/* 页脚 */
.foot{
display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
gap:12px;max-width:1120px;margin:0 auto;
padding:24px clamp(14px,4vw,28px) 44px;
font-size:16px;color:var(--muted);
box-shadow:inset 0 8px 18px -14px rgba(0,0,0,.9);
}
.foot article{margin:0}
.foot-brand{color:#cfe0ee;font-weight:500;letter-spacing:.06em}
.foot-copy{margin:0}

/* 回到顶部 */
.totop{
position:fixed;right:16px;bottom:16px;z-index:50;
display:inline-flex;align-items:center;justify-content:center;
min-height:44px;padding:0 16px;border-radius:12px;
text-decoration:none;font-size:16px;color:var(--fg);
background:linear-gradient(145deg,#1f2a34,#141c23);
box-shadow:var(--sh-out);
opacity:0;visibility:hidden;
transition:opacity .25s ease,visibility .25s ease,transform .15s ease;
}
.totop.on{opacity:1;visibility:visible}
.totop:active{transform:scale(.96);box-shadow:var(--sh-in)}

/* 滚动显形 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

@media (max-width:900px){
.split{grid-template-columns:minmax(0,1fr)}
.side{position:static;top:auto;order:2}
.prose > article{margin-bottom:24px}
}

@media (max-width:760px){
.bar{grid-template-columns:minmax(0,1fr) auto;gap:10px}
.brand{grid-column:1;grid-row:1}
.burger{grid-column:2;grid-row:1}
.find{grid-column:1 / -1;grid-row:2;justify-self:stretch}
.find-input{width:100%}
.hero{grid-template-columns:minmax(0,1fr);min-height:0;padding:30px 0 34px;gap:26px}
.hero-art{aspect-ratio:16/10}
.hero-lead{max-width:none}
.drawer-list li a{font-size:18px;min-height:52px}
}

@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.reveal{transition:none}
.press,.burger,.totop{transition:none}
.hero-art img,.hero-art.is-plain .orb{will-change:auto}
}
</style>

button[aria-expanded]{min-width:44px;min-height:44px}