:root{
  --purple:#5522a7; --purple2:#32126d; --pink:#ed5aa5; --ink:#241a38;
  --muted:#665d73; --bg:#f7f5fb; --card:#fff; --line:#e7e1ef;
  --shadow:0 18px 55px rgba(50,18,109,.11); --radius:24px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:
radial-gradient(circle at 85% 0%,rgba(237,90,165,.10),transparent 28rem),
radial-gradient(circle at 0% 25%,rgba(85,34,167,.08),transparent 30rem),var(--bg);line-height:1.75}
a{color:var(--purple);text-decoration:none}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:14px;font-weight:800;color:var(--purple2)}
.brand img{width:58px;height:58px;object-fit:contain;display:block}.brand span{line-height:1.1}
.navlinks{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.navlinks a,.navbtn{border:1px solid transparent;padding:9px 12px;border-radius:12px;font-weight:650;background:transparent;color:var(--ink);cursor:pointer}
.navlinks a:hover,.navbtn:hover{background:#f2ecfb;border-color:#e4d9f4}
.hero{padding:58px 0 42px}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:45px}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#f0e9fb;color:var(--purple);font-weight:800;font-size:.84rem;letter-spacing:.04em;text-transform:uppercase}
h1{font-size:clamp(2.3rem,6vw,4.6rem);line-height:1.02;margin:18px 0 16px;letter-spacing:-.045em}
h2{font-size:clamp(1.55rem,3vw,2.2rem);line-height:1.15;letter-spacing:-.025em;margin:0 0 14px}h3{margin-bottom:7px}
.lead{font-size:1.12rem;color:var(--muted);max-width:760px}.meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.pill{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.9rem;color:var(--muted)}
.hero-art{width:100%;border-radius:32px;box-shadow:var(--shadow);display:block;background:#fff}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin:8px 0 35px}.btn{border:0;border-radius:14px;padding:11px 15px;background:var(--purple);color:#fff;font-weight:800;cursor:pointer;box-shadow:0 8px 20px rgba(85,34,167,.22)}.btn.secondary{background:#fff;color:var(--purple);border:1px solid var(--line);box-shadow:none}
.layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:28px;align-items:start}.toc{position:sticky;top:98px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow)}
.toc strong{display:block;margin-bottom:10px}.toc a{display:block;padding:8px 10px;border-radius:10px;color:var(--muted);font-size:.92rem}.toc a:hover{background:#f5effc;color:var(--purple)}
.section{scroll-margin-top:100px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-bottom:20px;box-shadow:0 10px 35px rgba(50,18,109,.06)}
.section-head{display:flex;gap:16px;align-items:flex-start}.section-num{min-width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(135deg,var(--purple),var(--pink));color:#fff;font-weight:900}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.mini{padding:20px;border-radius:18px;background:#faf8fd;border:1px solid #eee8f5}
ul{padding-left:23px}li{margin:7px 0}.note{border-left:5px solid var(--pink);background:#fff5fa;padding:16px 18px;border-radius:14px;margin:18px 0}.warning{border-left-color:#7b54cf;background:#f5f0ff}
.flow{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;margin:25px 0;box-shadow:var(--shadow)}.flow img{width:100%;display:block}
.searchbox{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff;margin-bottom:14px}
.footer{margin-top:60px;padding:45px 0;background:#241a38;color:#eee}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:25px}.footer a{color:#f6b9db}.footer small{color:#bcb4c7}
.top{position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:50%;border:0;background:var(--purple);color:white;font-size:20px;cursor:pointer;box-shadow:0 10px 25px #0003;opacity:0;pointer-events:none;transition:.2s}.top.show{opacity:1;pointer-events:auto}
.dark{--ink:#f4effb;--muted:#c6bed1;--bg:#15111d;--card:#211b2b;--line:#3a3146}.dark .topbar{background:rgba(25,20,32,.9)}.dark .toc,.dark .section,.dark .flow,.dark .mini,.dark .searchbox,.dark .pill,.dark .btn.secondary{background:#211b2b;color:var(--ink)}.dark .toc a{color:#c6bed1}.dark .note{background:#302031}.dark .warning{background:#2b233a}
@media(max-width:900px){.hero-grid,.layout,.footer-grid{grid-template-columns:1fr}.toc{position:relative;top:auto}.nav{align-items:flex-start;padding:10px 0}.brand img{width:48px;height:48px}.navlinks{display:none}.grid{grid-template-columns:1fr}}
@media(max-width:560px){.wrap{width:min(100% - 22px,1180px)}.hero{padding-top:35px}.section{padding:21px}.brand span{font-size:.9rem}.hero-art{border-radius:20px}h1{font-size:2.55rem}}
@media print{.topbar,.toolbar,.toc,.top{display:none!important}.hero{padding-top:0}.layout{display:block}.section{box-shadow:none;break-inside:avoid}.footer{background:white;color:#111;border-top:1px solid #ccc}}