:root{--navy:#0a1f44;--teal:#0e5a6d;--amber:#f6b24a;--ink:#1c2733;--paper:#fdfcf9;--line:#e3e7ee}
*{box-sizing:border-box}body{margin:0;font-family:Georgia,'Times New Roman',serif;color:var(--ink);background:var(--paper);line-height:1.65}
header.site{background:var(--navy);color:#fff;padding:14px 20px}header.site .wrap{max-width:1020px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
header.site a{color:#fff;text-decoration:none}header.site .brand{font-family:Helvetica,Arial,sans-serif;font-weight:bold;font-size:20px}header.site .brand span{color:var(--amber)}
nav a{font-family:Helvetica,Arial,sans-serif;font-size:14px;margin-left:16px;opacity:.92}nav a:hover{opacity:1;text-decoration:underline}
.wrap{max-width:1020px;margin:0 auto;padding:0 20px}
.hero{background:var(--navy);color:#fff;padding:44px 0 52px}.hero h1{font-family:Helvetica,Arial,sans-serif;font-size:38px;line-height:1.15;margin:0 0 12px}.hero h1 span{color:var(--amber)}
.hero p{font-size:19px;max-width:640px;margin:0 0 22px;color:#d7e0ee}
.btn{display:inline-block;background:var(--amber);color:#231a05;font-family:Helvetica,Arial,sans-serif;font-weight:bold;padding:12px 22px;border-radius:8px;text-decoration:none}
.btn.ghost{background:transparent;color:#fff;border:2px solid #fff;margin-left:10px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin:34px 0}
.card{border:1px solid var(--line);border-radius:12px;padding:20px;background:#fff}.card h3{font-family:Helvetica,Arial,sans-serif;margin:0 0 8px;font-size:18px}.card h3 a{color:var(--teal);text-decoration:none}.card p{margin:0;font-size:15.5px;color:#44536a}
article{max-width:760px;margin:0 auto;padding:28px 20px 10px}article h1{font-family:Helvetica,Arial,sans-serif;font-size:31px;line-height:1.25}article h2{font-family:Helvetica,Arial,sans-serif;font-size:23px;margin-top:34px}article h3{font-family:Helvetica,Arial,sans-serif;font-size:18px}
article table{border-collapse:collapse;margin:16px 0;width:100%}article td,article th{border:1px solid #c8d0dd;padding:6px 9px;font-size:14.5px}article code{font-family:Menlo,Consolas,monospace;font-size:.92em;background:#eef1f6;padding:1px 4px;border-radius:4px}
.bookpanel{max-width:760px;margin:26px auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;gap:22px;align-items:center}
.bookpanel img{width:130px;border-radius:6px;box-shadow:0 4px 14px rgba(10,31,68,.25)}.bookpanel h3{font-family:Helvetica,Arial,sans-serif;margin:0 0 6px}.bookpanel p{margin:0 0 12px;font-size:15.5px;color:#44536a}
.prevnext{max-width:760px;margin:8px auto 30px;padding:0 20px;display:flex;justify-content:space-between;font-family:Helvetica,Arial,sans-serif;font-size:14px}
.prevnext a{color:var(--teal);text-decoration:none}
.ad-slot{max-width:760px;margin:22px auto;min-height:0}
footer.site{border-top:1px solid var(--line);margin-top:26px;padding:22px 20px;text-align:center;font-family:Helvetica,Arial,sans-serif;font-size:13.5px;color:#5a6a80}
footer.site a{color:var(--teal);text-decoration:none;margin:0 8px}
@media(max-width:640px){.hero h1{font-size:29px}.bookpanel{flex-direction:column;text-align:center}}