*,*::before,*::after{box-sizing:border-box}
:root{
--red:#ff0000;
--purple:#8b00ff;
--ink:#261717;
--txt:#f6ebef;
--dim:#d6c2ca;
--line:rgba(255,255,255,.16);
--glass:rgba(255,255,255,.06);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
margin:0;padding-left:264px;min-height:100vh;overflow-x:hidden;
font-family:'Plus Jakarta Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
font-size:17px;line-height:1.75;color:var(--txt);
background:
 radial-gradient(900px 720px at 88% -12%,rgba(139,0,255,.42),transparent 62%),
 radial-gradient(820px 640px at -8% 18%,rgba(255,0,0,.32),transparent 58%),
 radial-gradient(700px 700px at 62% 108%,rgba(139,0,255,.24),transparent 62%),
 linear-gradient(168deg,#301b1b 0%,#1c1010 54%,#22101d 100%);
background-attachment:fixed;
}
a{color:inherit}
:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:12px}
.backdrop{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.beam{position:absolute;left:-40%;width:180%;height:210px;filter:blur(30px);opacity:.5}
.beam-a{top:11%;transform:rotate(-16deg);background:linear-gradient(90deg,transparent,rgba(255,0,0,.55),rgba(139,0,255,.5),transparent)}
.beam-b{top:64%;height:140px;opacity:.34;transform:rotate(11deg);background:linear-gradient(90deg,transparent,rgba(139,0,255,.6),rgba(255,0,0,.4),transparent)}
.orb{position:absolute;border-radius:50%;filter:blur(62px);opacity:.5}
.orb-a{width:340px;height:340px;top:-70px;right:-50px;background:radial-gradient(circle,rgba(139,0,255,.72),transparent 70%)}
.orb-b{width:280px;height:280px;bottom:-90px;left:8%;background:radial-gradient(circle,rgba(255,0,0,.55),transparent 70%)}

/* 左侧竖排导航 */
.rail{
position:fixed;left:0;top:0;bottom:0;width:264px;z-index:30;
display:flex;flex-direction:column;gap:16px;padding:22px 18px;
background:linear-gradient(180deg,rgba(255,255,255,.1),rgba(255,255,255,.03));
border-right:1px solid var(--line);
backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.mark{
display:grid;place-items:center;width:46px;height:46px;flex:0 0 auto;
border-radius:16px;border:1px solid rgba(255,255,255,.3);overflow:hidden;
background:linear-gradient(140deg,rgba(255,0,0,.88),rgba(139,0,255,.88));
color:#fff;text-decoration:none;transition:transform .22s ease,box-shadow .22s ease;
}
.mark:hover{transform:translateY(-2px) scale(1.05);box-shadow:0 10px 24px rgba(139,0,255,.35)}
.mark-glyph{font-weight:700;font-size:20px;letter-spacing:.02em}
.mark-img{display:block;width:100%;height:100%;object-fit:cover}
.rail-nav{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.pill{
display:flex;align-items:center;min-height:44px;padding:10px 16px;border-radius:999px;
font-size:16px;line-height:1.4;color:var(--txt);text-decoration:none;
border:1px solid var(--line);background:rgba(255,255,255,.06);
backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
transition:background .22s ease,transform .22s ease,border-color .22s ease;
}
.pill:hover{background:linear-gradient(100deg,rgba(255,0,0,.5),rgba(139,0,255,.5));border-color:rgba(255,255,255,.42);transform:translateX(3px)}
.pill.on{background:linear-gradient(100deg,rgba(255,0,0,.58),rgba(139,0,255,.58));border-color:rgba(255,255,255,.46)}

/* 顶部细条 */
.topbar{
position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;
min-height:44px;padding:9px 32px;font-size:15px;letter-spacing:.05em;color:#fbeef2;
background:linear-gradient(90deg,rgba(255,0,0,.3),rgba(139,0,255,.26));
border-bottom:1px solid var(--line);
backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.pulse{width:8px;height:8px;border-radius:50%;background:#fff;box-shadow:0 0 0 4px rgba(255,255,255,.22);animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* 布局 */
.wrap{
position:relative;z-index:1;display:grid;grid-template-columns:246px minmax(0,1fr);
gap:26px;align-items:start;max-width:1180px;margin:0 auto;padding:26px 32px 64px;
}
.side{position:sticky;top:66px}
.glass{background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.side-card{border-radius:28px;padding:20px}
.side-h{margin:0 0 8px;font-size:18px;line-height:1.4;font-weight:600;color:#fff}
.subtitle{margin:0 0 16px;font-size:15px;line-height:1.6;color:var(--dim)}
.side-jump ul{list-style:none;margin:0 0 14px;padding:0;display:flex;flex-direction:column;gap:2px}
.side-jump a{display:block;min-height:40px;padding:8px 10px;border-radius:14px;border:1px solid transparent;font-size:16px;color:var(--dim);text-decoration:none;transition:background .2s,color .2s}
.side-jump a:hover{color:#fff;background:rgba(255,255,255,.09);border-color:var(--line)}
.side-top{
display:inline-flex;align-items:center;min-height:40px;padding:8px 16px;border-radius:999px;
font-size:15px;color:#fff;text-decoration:none;
background:linear-gradient(100deg,rgba(255,0,0,.62),rgba(139,0,255,.62));
border:1px solid rgba(255,255,255,.3);transition:filter .2s ease;
}
.side-top:hover{filter:brightness(1.14)}

.stage{min-width:0}
.sheet{
border-radius:36px;padding:0 0 30px;overflow:hidden;
background:rgba(255,255,255,.045);border:1px solid var(--line);
backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}

/* 头部区 */
.hero{position:relative;min-height:45vh;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:14px;text-align:center;padding:56px 26px 64px}
.hero::before{content:'';position:absolute;inset:0;pointer-events:none;background:radial-gradient(520px 260px at 50% 0,rgba(139,0,255,.34),transparent 72%)}
.hero::after{content:'';position:absolute;left:8%;right:8%;bottom:12px;height:7px;border-radius:8px;transform:skewX(-18deg);background:linear-gradient(90deg,rgba(255,0,0,.9),rgba(139,0,255,.9))}
.hero-row{position:relative;z-index:1;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:14px}
.hero-badge{
display:grid;place-items:center;width:54px;height:54px;flex:0 0 auto;border-radius:50%;color:#fff;
background:linear-gradient(140deg,rgba(255,0,0,.92),rgba(139,0,255,.92));
border:1px solid rgba(255,255,255,.38);box-shadow:0 0 0 8px rgba(255,255,255,.06);
}
.hero h1{
position:relative;z-index:1;margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.22;
font-size:clamp(1.75rem,4.4vw,2.9rem);
background:linear-gradient(96deg,#fff,#ffd9e2 46%,#e5d0ff);
-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-line{position:relative;z-index:1;margin:0;max-width:62ch;font-size:16px;line-height:1.75;color:var(--dim)}

/* 正文片段 */
.sheet > div{
position:relative;margin:0 26px 22px;padding:26px 24px 28px;border-radius:28px;
background:rgba(255,255,255,.055);border:1px solid var(--line);
backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);scroll-margin-top:74px;
}
.sheet > div:last-child{margin-bottom:0}
.sheet h2{margin:0 0 14px;font-size:clamp(1.28rem,2.5vw,1.7rem);line-height:1.35;font-weight:700;color:#fff;letter-spacing:.01em}
.sheet h2::after{content:'';display:block;width:56px;height:4px;margin-top:12px;border-radius:4px;transform:skewX(-20deg);background:linear-gradient(90deg,var(--red),var(--purple))}
.sheet h2 + p{font-size:17px;color:#fff}
.sheet p{margin:0 0 16px}
.sheet p:last-child{margin-bottom:0}
.sheet h3{margin:24px 0 10px;font-size:18px;line-height:1.5;color:#ffd7e0}
.sheet ul,.sheet ol{margin:0 0 16px;padding-left:22px}
.sheet li{margin:6px 0}
.sheet a{color:#ffb3c2;text-underline-offset:3px;text-decoration-color:rgba(255,179,194,.55)}
.sheet a:hover{color:#fff}
.sheet strong,.sheet b{color:#fff}
.sheet blockquote{margin:0 0 16px;padding:12px 18px;border-left:3px solid rgba(255,0,0,.72);background:rgba(255,255,255,.05);border-radius:0 18px 18px 0}
.sheet blockquote p:last-child{margin-bottom:0}
.sheet img{display:block;max-width:100%;height:auto;border-radius:20px;border:1px solid var(--line)}
.sheet figure{margin:0 0 16px}
.sheet figcaption{font-size:15px;color:var(--dim);margin-top:8px}
.sheet table{width:100%;border-collapse:collapse;font-size:16px}
.sheet th,.sheet td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.sheet hr{border:0;height:1px;margin:22px 0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.28),transparent)}

/* 页脚 */
.foot{
position:relative;z-index:1;display:flex;align-items:center;flex-wrap:wrap;gap:12px 20px;
padding:20px 32px 28px;border-top:1px solid var(--line);
background:rgba(255,255,255,.045);
backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.foot .mark.small{width:38px;height:38px;border-radius:14px}
.foot-copy{margin-right:auto;font-size:15px;color:var(--dim)}
.foot-go a{
display:inline-flex;align-items:center;min-height:40px;padding:8px 16px;border-radius:999px;
font-size:15px;color:#fff;text-decoration:none;border:1px solid var(--line);background:rgba(255,255,255,.07);
transition:background .2s ease;
}
.foot-go a:hover{background:linear-gradient(100deg,rgba(255,0,0,.58),rgba(139,0,255,.58))}
.foot-nav dl{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;margin:0}
.foot-nav dt,.foot-nav dd{margin:0}
.foot-nav a{
display:inline-flex;align-items:center;min-height:40px;padding:6px 12px;border-radius:999px;
font-size:15px;color:var(--dim);text-decoration:none;border:1px solid transparent;transition:background .2s,color .2s,border-color .2s;
}
.foot-nav a:hover{color:#fff;border-color:var(--line);background:rgba(255,255,255,.08)}

/* 滚动显现 */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:980px){
body{padding-left:0}
.rail{
position:static;width:auto;flex-direction:row;align-items:center;gap:10px;
padding:12px 14px;border-right:0;border-bottom:1px solid var(--line);
overflow-x:auto;overflow-y:hidden;
}
.rail-nav{flex-direction:row;gap:8px;margin-top:0}
.pill{white-space:nowrap;padding:8px 14px}
.pill:hover{transform:none}
.topbar{position:static;padding:9px 16px;font-size:14px}
.wrap{grid-template-columns:minmax(0,1fr);gap:18px;padding:18px 14px 48px}
.side{position:static;order:2}
.side-jump ul{flex-direction:row;flex-wrap:wrap;gap:4px}
.side-jump a{padding:8px 12px;border:1px solid var(--line)}
.side-card{border-radius:24px;padding:16px}
.sheet{border-radius:26px;padding-bottom:20px}
.sheet > div{margin:0 14px 16px;padding:20px 16px;border-radius:24px;scroll-margin-top:14px}
.sheet > div:last-child{margin-bottom:0}
.hero{min-height:auto;padding:32px 16px 46px}
.foot{padding:16px 14px 24px;gap:12px}
.foot-copy{order:3;width:100%;margin-right:0}
.foot-nav{order:4;width:100%}
}
@media (max-width:420px){
.hero h1{font-size:1.62rem}
.hero-badge{width:46px;height:46px}
}

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