:root{--blue:#0b4f9c;--navy:#083763;--ink:#12223a;--muted:#65758b;--line:#dbe7f4;--soft:#f4f8fd;--gold:#b98528;--radius:22px;--shadow:0 18px 42px rgba(8,55,99,.10)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#f5f8fc;line-height:1.68}.wp-topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 6vw;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.wp-brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:14px;background:#111;color:#fff;font-weight:800}.wp-brand b{display:block;font-size:18px}.wp-brand 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/* AEO mother-source whitepaper update 20260510-aeo-mother */
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.aeo-panel{background:linear-gradient(135deg,#ffffff,#f4f9ff);}
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.aeo-grid article{border:1px solid var(--line);border-radius:22px;padding:22px;background:#fff;box-shadow:0 12px 28px rgba(8,55,99,.06);}
.aeo-grid b{display:block;color:#0b4f9c;font-size:20px;margin-bottom:8px;}
.aeo-grid span{color:var(--muted);}
.pdf-reader{background:#fff;}
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.pdf-frame{width:100%;height:760px;border:1px solid var(--line);border-radius:24px;background:#f3f7fb;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4);}
.case-gallery figure{background:#fbfdff;border:1px solid var(--line);border-radius:22px;padding:10px;}
.case-gallery img{height:260px;object-fit:cover;border-radius:18px;}
.wp-nav a[href="#pdf-preview"]{color:var(--blue);}
@media(max-width:900px){.aeo-grid{grid-template-columns:1fr;}.pdf-frame{height:560px;}}
@media(max-width:620px){.pdf-frame{height:420px;}}