:root{
    --navy:#001A4E; --navy2:#002878; --blue:#0072CE; --azure:#00A2FF; --sky:#E8F3FF;
    --orange:#FF6B00; --amber:#FFA500; --ink:#12203A; --muted:#5A6B85; --bg:#F7FAFF; --card:#FFFFFF;
    --shadow:0 10px 30px rgba(0,26,78,.10); --radius:16px;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
  .wrap{max-width:1150px;margin:0 auto;padding:0 20px}
  
  nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid #E3ECF8}
  .nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--navy)}
  .brand img{height:38px;width:38px;object-fit:contain}
  .brand .dom{font-size:.95rem;letter-spacing:.2px}
  .nav-links{display:flex;gap:22px}
  .nav-links a{color:var(--ink);text-decoration:none;font-size:.95rem;font-weight:600}
  .nav-links a:hover{color:var(--azure)}
  @media(max-width:700px){.nav-links{display:none}}
  
  header.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 55%,#003a8f 100%);color:#fff;position:relative;overflow:hidden}
  header.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(0,162,255,.35),transparent 70%)}
  .hero-in{display:flex;align-items:center;gap:48px;padding:70px 0 80px;position:relative;z-index:1}
  .hero-logo{flex:0 0 190px;text-align:center}
  .hero-logo img{width:180px;height:180px;object-fit:contain;filter:drop-shadow(0 8px 24px rgba(0,162,255,.35))}
  .hero-txt h1{font-size:clamp(2rem,4.5vw,3.1rem);line-height:1.15;font-weight:800}
  .hero-txt h1 span{background:linear-gradient(90deg,var(--amber),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block;overflow-wrap:normal;word-break:keep-all}
  .hero-txt .tag{margin:14px 0 8px;font-size:1.15rem;color:#BBD8FF;font-weight:600}
  .hero-txt p{color:#DCE9FF;max-width:620px}
  .hero-cta{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
  .btn{display:inline-block;padding:12px 26px;border-radius:999px;text-decoration:none;font-weight:700;font-size:.98rem;transition:.2s}
  .btn-o{background:linear-gradient(90deg,var(--amber),var(--orange));color:#fff;box-shadow:0 6px 18px rgba(255,107,0,.35)}
  .btn-o:hover{transform:translateY(-2px)}
  .btn-g{border:2px solid rgba(255,255,255,.55);color:#fff}
  .btn-g:hover{background:rgba(255,255,255,.12)}
  .domain-chip{display:inline-block;margin-top:18px;background:rgba(0,162,255,.16);border:1px solid rgba(0,162,255,.4);color:#9FD4FF;padding:6px 16px;border-radius:999px;font-size:.88rem;font-weight:600;letter-spacing:.4px}
  
  section{padding:70px 0}
  .sec-head{text-align:center;margin-bottom:44px}
  .kicker{display:inline-block;color:var(--orange);font-weight:800;letter-spacing:2.5px;text-transform:uppercase;font-size:.8rem;margin-bottom:10px}
  .sec-head h2{font-size:clamp(1.6rem,3vw,2.3rem);color:var(--navy)}
  .sec-head .rule{width:70px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--azure),var(--orange));margin:16px auto 0}
  
  .about{background:#fff}
  .about-grid{display:flex;gap:48px;align-items:center;flex-wrap:wrap}
  .about-photo{flex:0 0 300px;text-align:center}
  .about-photo img{width:280px;height:280px;object-fit:cover;border-radius:24px;box-shadow:var(--shadow);border:5px solid #fff;outline:1px solid #E3ECF8}
  .about-photo .cap{margin-top:10px;font-weight:700;color:var(--navy)}
  .about-txt{flex:1;min-width:300px}
  .about-txt p{margin-bottom:16px;color:#33445F;font-size:1.05rem}
  .skills{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .skill{background:var(--sky);color:var(--blue);padding:7px 16px;border-radius:999px;font-weight:700;font-size:.85rem}
  .skill.hot{background:#FFF1E5;color:var(--orange)}
  
  .books-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:28px}
  .book{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;display:flex;gap:20px;border:1px solid #E9F0FA;transition:.25s}
  .book:hover{transform:translateY(-5px);box-shadow:0 18px 40px rgba(0,26,78,.16)}
  .book .cov{flex:0 0 140px}
  .book .cov img{width:140px;border-radius:8px;box-shadow:0 8px 20px rgba(0,26,78,.22);display:block}
  .ph{width:140px;aspect-ratio:2/3;border-radius:8px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;color:#fff;padding:12px;box-shadow:0 8px 20px rgba(0,26,78,.22)}
  .ph.ph-navy{background:linear-gradient(160deg,var(--navy),var(--blue))}
  .ph.ph-o{background:linear-gradient(160deg,#B34700,var(--orange))}
  .ph .t{font-weight:800;font-size:.95rem;line-height:1.3}
  .ph .a{margin-top:8px;font-size:.72rem;opacity:.85}
  .book h3{font-size:1.08rem;color:var(--navy);line-height:1.35;margin-bottom:6px}
  .stars{color:var(--amber);font-weight:700;font-size:.9rem;margin-bottom:8px}
  .stars small{color:var(--muted);font-weight:600}
  .book p{font-size:.9rem;color:#41506B;margin-bottom:10px}
  .book ul{list-style:none;margin:0 0 14px}
  .book ul li{font-size:.85rem;color:#41506B;padding-left:18px;position:relative;margin-bottom:4px}
  .book ul li::before{content:"✦";position:absolute;left:0;color:var(--azure)}
  .buy-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto}
  .btn-s{padding:9px 18px;border-radius:999px;font-size:.85rem;font-weight:700;text-decoration:none;color:#fff;background:linear-gradient(90deg,#232F3E,#37475A)}
  .btn-s:hover{opacity:.9}
  .btn-sup{background:linear-gradient(90deg,var(--amber),var(--orange))}
  .badge{display:inline-block;font-size:.7rem;font-weight:800;letter-spacing:1px;text-transform:uppercase;padding:3px 10px;border-radius:999px;margin-bottom:8px}
  .badge.amz{background:#FFF1E5;color:#B35400}
  .badge.sup{background:var(--sky);color:var(--blue)}
  
  footer{background:var(--navy);color:#B9CBEA;padding:52px 0 30px;text-align:center}
  footer img{width:76px;height:76px;object-fit:contain;margin-bottom:14px}
  footer h3{color:#fff;font-size:1.3rem;margin-bottom:6px}
  footer .dom{color:var(--amber);font-weight:700;letter-spacing:.5px}
  .f-links{margin:20px 0;display:flex;justify-content:center;gap:22px;flex-wrap:wrap}
  .f-links a{color:#BBD8FF;text-decoration:none;font-size:.92rem}
  .f-links a:hover{color:#fff}
  .copy{font-size:.82rem;color:#7D93BC;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;max-width:700px;margin:0 auto}
  @media(max-width:560px){
    .hero-in{flex-direction:column;text-align:center;padding:50px 0 60px}
    .hero-txt h1{font-size:1.7rem}
    .hero-txt h1 span{font-size:1.35rem}
    .hero-txt p{font-size:.95rem}
    .domain-chip{font-size:.78rem;padding:5px 12px}
    .book{flex-direction:column;align-items:center;text-align:center}
    .book ul li{padding-left:0}
    .book ul li::before{content:""}
    .buy-row{justify-content:center}
    .about-grid{justify-content:center}
  }