*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1e293b;line-height:1.78;font-size:16px}
a{color:#6d28d9;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:1px solid #ddd6fe;position:sticky;top:0;z-index:300}
.header-inner{max-width:1140px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#0f172a;font-weight:600;font-size:.94rem}
.brand em{font-style:normal;color:#6d28d9;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:#475569;font-size:.92rem}
.site-nav a.active{color:#6d28d9;font-weight:600}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:#334155;margin:5px 0;border-radius:1px}

.ads-top-bar{background:#f5f3ff;border-bottom:1px solid #e9d5ff;padding:10px 0}
#applist .applist-title{font-size:.85rem;color:#64748b;margin-bottom:8px}
#ads{display:flex;flex-wrap:wrap;gap:12px}

.base-hero{background:linear-gradient(128deg,#f5f3ff 0%,#fff 38%,#ecfeff 100%);padding:48px 20px 40px;border-bottom:1px solid #e9d5ff;position:relative;overflow:hidden}
.base-hero::before{content:"";position:absolute;left:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,#a5f3fc 0%,transparent 68%);opacity:.45;pointer-events:none}
.base-hero-inner{max-width:1140px;margin:0 auto;position:relative;z-index:1}
.base-tag{display:inline-block;font-size:.78rem;color:#5b21b6;background:#ede9fe;padding:5px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:.03em;border:1px solid #c4b5fd}
.base-hero h1{font-size:clamp(1.32rem,3.3vw,1.9rem);line-height:1.36;margin-bottom:16px;color:#0f172a;max-width:840px}
.base-lede{font-size:1.02rem;color:#475569;max-width:800px;margin-bottom:12px}
.base-lede:last-of-type{margin-bottom:0}

.base-wrap{max-width:1140px;margin:0 auto;padding:0 20px 56px;display:grid;grid-template-columns:210px 1fr;gap:32px;align-items:start}
.base-side{position:sticky;top:88px;padding-top:28px}
.base-side h2{font-size:.84rem;color:#64748b;margin-bottom:12px;font-weight:600}
.base-side nav ol{list-style:none;border-left:3px solid #8b5cf6}
.base-side nav a{display:block;padding:8px 0 8px 16px;font-size:.82rem;color:#475569;line-height:1.4;transition:color .15s}
.base-side nav a:hover,.base-side nav a.is-active{color:#6d28d9;text-decoration:none;font-weight:600;border-left:3px solid #6d28d9;margin-left:-3px;padding-left:13px}

.base-flow{display:flex;flex-direction:column;position:relative}
.base-flow::before{content:"";position:absolute;left:24px;top:0;bottom:0;width:3px;background:repeating-linear-gradient(180deg,#c4b5fd 0,#c4b5fd 8px,transparent 8px,transparent 16px);opacity:.55;pointer-events:none}

.zg-band{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:44px 0 44px 48px;position:relative}
.zg-band::after{content:attr(data-num);position:absolute;left:8px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:8px;background:#6d28d9;color:#fff;font-size:.7rem;font-weight:700;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(109,40,217,.22)}
.zg-band:nth-child(odd){background:linear-gradient(95deg,#faf5ff 0%,#fff 60%)}
.zg-band:nth-child(even){background:linear-gradient(275deg,#ecfeff 0%,#fff 60%)}
.zg-band.flip .zg-copy{order:2}
.zg-band.flip .zg-visual{order:1}
.zg-copy h2{font-size:1.15rem;margin-bottom:14px;color:#0f172a;line-height:1.34}
.zg-copy p{margin-bottom:12px;color:#334155;font-size:.97rem}
.zg-visual figure{margin:0;border-radius:16px;overflow:hidden;box-shadow:0 14px 40px rgba(109,40,217,.1);border:1px solid #e9d5ff;clip-path:polygon(0 0,100% 0,100% 92%,92% 100%,0 100%)}
.zg-visual figcaption{font-size:.8rem;color:#64748b;margin-top:10px;text-align:center;padding:0 8px;line-height:1.5}

.base-callout{background:#f0fdfa;border-left:4px solid #14b8a6;padding:14px 18px;margin:12px 0 4px;border-radius:0 12px 12px 0;font-size:.93rem;color:#334155}

.base-block{padding:36px 0 36px 48px;border-bottom:1px solid #ede9fe}
.base-block h2{font-size:1.13rem;margin-bottom:14px;color:#0f172a}
.base-block p{margin-bottom:12px;color:#334155;font-size:.97rem}

.base-faq{padding:40px 0 40px 48px}
.base-faq h2{font-size:1.13rem;margin-bottom:18px}
.faq-item{padding:16px 0;border-top:1px solid #ede9fe}
.faq-item:first-of-type{border-top:none;padding-top:0}
.faq-item h3{font-size:1rem;font-weight:600;color:#0f172a;margin-bottom:8px}
.faq-item p{color:#475569;font-size:.96rem;line-height:1.72}

.base-more{padding:26px 0 26px 48px;border-top:1px solid #ede9fe}
.base-more h2{font-size:1.02rem;margin-bottom:12px}
.base-more ul{padding-left:1.25rem;line-height:1.95;color:#475569}

.base-end{padding:32px 0 8px 48px;border-top:1px dashed #c4b5fd}
.base-end h2{font-size:1.05rem;margin-bottom:12px;color:#0f172a}
.base-end p{color:#475569;font-size:.96rem;margin-bottom:10px}

.site-footer{background:#f8fafc;border-top:1px solid #e2e8f0;padding:28px 20px;text-align:center;font-size:.88rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:10px}
.footer-sub{font-size:.82rem;color:#94a3b8;margin-top:6px}
.prose-page{max-width:720px;margin:40px auto;padding:0 20px}
.prose-page h1{font-size:1.4rem;margin-bottom:16px}
.error-page{max-width:480px;margin:80px auto;padding:0 20px;text-align:center}

@media(max-width:900px){
  .base-wrap{grid-template-columns:1fr}
  .base-side{display:none}
  .base-flow::before{display:none}
  .zg-band{grid-template-columns:1fr;padding:32px 0;gap:24px}
  .zg-band::after{left:50%;top:12px;transform:translateX(-50%)}
  .zg-band.flip .zg-copy,.zg-band.flip .zg-visual{order:unset}
  .base-block,.base-faq,.base-more,.base-end{padding-left:0}
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #ddd6fe;padding:12px 20px;display:none;box-shadow:0 8px 24px rgba(15,23,42,.08)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:10px}
  .site-header{position:relative}
}