*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1e1b4b;line-height:1.76;font-size:16px}
a{color:#4f46e5;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

.site-header{background:#fff;border-bottom:2px solid #4338ca;position:sticky;top:0;z-index:340}
.header-inner{max-width:1140px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:600;font-size:.94rem}
.brand:hover{text-decoration:none}
.brand img{border-radius:6px}
.brand em{font-style:normal;color:#4338ca;font-weight:700}
.site-nav ul{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none}
.site-nav a{color:#64748b;font-size:.9rem;padding:4px 0}
.site-nav a.active,.site-nav a:hover{color:#4338ca;font-weight:600;border-bottom:2px solid #6366f1;text-decoration:none}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#333;transition:.2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.ads-top-bar{background:#eef2ff;border-bottom:1px solid #c7d2fe;padding:10px 0}
.applist-title{font-size:.78rem;color:#4338ca;text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}

.wl-shell{display:grid;grid-template-columns:minmax(0,1fr) 210px;gap:32px;max-width:1140px;margin:0 auto;padding:28px 20px 40px}
.wl-body{min-width:0}

.wl-intro{background:linear-gradient(145deg,#312e81 0%,#4338ca 48%,#e0e7ff 100%);border-radius:20px;padding:36px 32px 32px;margin-bottom:32px;color:#fff;scroll-margin-top:88px;position:relative;overflow:hidden}
.wl-intro::after{content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;background:rgba(255,255,255,.08);border-radius:50%;pointer-events:none}
.wl-intro .wl-badge{display:inline-block;font-size:.76rem;font-weight:600;color:#312e81;background:#e0e7ff;padding:5px 14px;border-radius:999px;margin-bottom:14px;position:relative;z-index:1}
.wl-intro h1{font-size:clamp(1.34rem,3.3vw,1.76rem);line-height:1.38;margin-bottom:14px;color:#fff;position:relative;z-index:1}
.wl-intro .wl-lede{color:#e0e7ff;font-size:1.01rem;margin-bottom:10px;text-align:justify;position:relative;z-index:1}
.wl-intro .wl-lede:last-of-type{margin-bottom:0}
.wl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;position:relative;z-index:1}
.wl-tags span{font-size:.78rem;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.32)}

.wl-track{list-style:none;position:relative;padding:6px 0 10px}
.wl-track::before{content:"";position:absolute;left:24px;top:0;bottom:0;width:3px;background:linear-gradient(180deg,#4338ca,#a5b4fc 65%,#eef2ff);border-radius:3px}

.wl-node{position:relative;padding:0 0 34px 68px;scroll-margin-top:88px}
.wl-node::before{content:attr(data-step);position:absolute;left:0;top:2px;width:50px;height:50px;background:#4338ca;color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;line-height:50px;text-align:center;box-shadow:0 0 0 4px #eef2ff,0 4px 14px rgba(67,56,202,.22);z-index:2;transform:rotate(-3deg)}
.wl-card{background:#fff;border:1px solid #c7d2fe;border-radius:16px;padding:24px 26px;box-shadow:0 5px 18px rgba(67,56,202,.06);transition:transform .2s,box-shadow .2s}
.wl-card:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(67,56,202,.11)}
.wl-card h2{font-size:1.14rem;margin-bottom:12px;color:#312e81;line-height:1.4}
.wl-card p{margin-bottom:11px;color:#334155;text-align:justify;font-size:.97rem}
.wl-card ul,.wl-card ol{margin:10px 0 12px 20px;color:#334155;font-size:.95rem}
.wl-card li{margin-bottom:6px}
.wl-card figure{margin:18px 0 6px;border-radius:12px;overflow:hidden;border:1px solid #c7d2fe;background:#eef2ff}
.wl-card figcaption{font-size:.84rem;color:#64748b;padding:10px 14px;background:#f8fafc}
.wl-tip{background:#eef2ff;border-left:5px solid #6366f1;padding:14px 18px;margin:14px 0;border-radius:0 10px 10px 0;font-size:.93rem;color:#334155}

.wl-faq{margin-top:10px;padding-top:28px;border-top:2px solid #4338ca;scroll-margin-top:88px}
.wl-faq>h2{font-size:1.12rem;margin-bottom:16px;color:#312e81}
.faq-item{border:1px solid #c7d2fe;margin-bottom:10px;background:#fff;border-radius:10px;overflow:hidden}
.faq-item summary{padding:14px 18px;cursor:pointer;font-weight:500;list-style:none;color:#334155}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{background:#eef2ff;border-bottom:1px solid #c7d2fe;color:#312e81}
.faq-item p{padding:14px 18px;color:#334155;font-size:.94rem}
.wl-tail{margin-top:24px;padding:20px 22px;background:linear-gradient(135deg,#eef2ff,#fff);border-radius:14px;border:1px solid #c7d2fe}
.wl-tail h2{font-size:1.02rem;margin-bottom:10px;color:#312e81}
.wl-tail p{font-size:.95rem;color:#334155}

.wl-rail{position:sticky;top:88px;align-self:start;background:#fff;border:2px solid #4338ca;border-radius:14px;padding:18px 14px;box-shadow:0 8px 22px rgba(67,56,202,.08)}
.wl-rail h2{font-size:.82rem;color:#312e81;margin-bottom:12px;letter-spacing:.02em}
.wl-rail ol{list-style:none;counter-reset:wlnav}
.wl-rail li{counter-increment:wlnav;margin-bottom:9px}
.wl-rail a{font-size:.82rem;color:#4f46e5;display:block;padding:3px 0;line-height:1.36;transition:color .15s}
.wl-rail a::before{content:counter(wlnav);display:inline-flex;align-items:center;justify-content:center;width:19px;height:19px;margin-right:6px;font-size:.68rem;font-weight:700;color:#fff;background:#6366f1;border-radius:4px;vertical-align:middle}
.wl-rail a.is-active{color:#312e81;font-weight:600;text-decoration:none}
.wl-rail a.is-active::before{background:#312e81}

.site-footer{background:#eef2ff;border-top:2px solid #4338ca;padding:28px 20px;text-align:center;font-size:.88rem;color:#64748b}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 16px;margin-bottom:10px}
.footer-links a{color:#64748b}
.footer-sub{font-size:.82rem;color:#4338ca;margin-top:6px}

.prose-page{max-width:780px;margin:0 auto;padding:32px 20px 48px}
.prose-page h1{font-size:1.4rem;margin-bottom:16px;color:#312e81}
.prose-page p{margin-bottom:12px;color:#334155}

.error-page{max-width:480px;margin:80px auto;padding:32px 20px;text-align:center}
.error-page h1{font-size:3rem;color:#4338ca;margin-bottom:12px}
.error-page p{margin-bottom:16px;color:#64748b}

@media(max-width:900px){
  .wl-shell{grid-template-columns:1fr}
  .wl-rail{position:static;order:-1;margin-bottom:8px}
  .wl-rail ol{display:flex;flex-wrap:wrap;gap:8px 14px}
  .wl-rail li{margin-bottom:0}
}
@media(max-width:720px){
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid #4338ca;padding:12px 20px;box-shadow:0 8px 20px rgba(0,0,0,.08)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:10px}
  .wl-node{padding-left:58px}
  .wl-node::before{width:42px;height:42px;line-height:42px;font-size:.72rem}
  .wl-track::before{left:20px}
}