:root{
    --wheat:#E08A1E; --wheat-soft:#FDF1DE; --earth:#1F4D3A; --field:#1F4D3A;
    --paper:#FFFFFF; --ink:#1C2B24; --muted:#5E5E5E; --line:#E6E6E6;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:"DM Sans",Inter,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.65}
  .zh{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif}
  a{color:inherit}
  .wrap{max-width:1080px;margin:0 auto;padding:0 20px}
  h1,h2,h3{font-family:"DM Sans",Inter,-apple-system,Arial,sans-serif;font-weight:700;letter-spacing:-.02em;line-height:1.15;margin:0}
  /* header */
  header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:64px}
  .brand{display:flex;align-items:center;gap:10px;text-decoration:none}
  .brand img{height:36px;width:auto;display:block}
  .brand span{font-family:"DM Sans",Arial,sans-serif;font-size:22px;font-weight:600;letter-spacing:1.5px;color:var(--field)}
  .nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0}
  .nav ul a{text-decoration:none;font-size:14px;color:var(--muted);font-weight:500}
  .nav ul a:hover{color:var(--ink)}
  @media(max-width:720px){.nav{height:auto;flex-wrap:wrap;padding:10px 0;gap:6px}.nav ul{gap:16px;overflow-x:auto;width:100%}.nav ul a{font-size:13px;white-space:nowrap}}
  .nav ul a.active{color:var(--field);border-bottom:2px solid var(--wheat)}
  /* hero */
  .hero{padding:64px 0 64px;border-bottom:1px solid var(--line);background:
     var(--paper)}
  .eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:12px;color:var(--field);font-weight:600;margin-bottom:18px}
  .hero h1{font-size:clamp(38px,5.4vw,60px);color:var(--field)}
  .hero-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:40px;align-items:center}
  .hero-logo{width:100%;max-width:380px;justify-self:center;display:block}
  @media(max-width:820px){.hero-grid{grid-template-columns:1fr}.hero-logo{max-width:260px;order:-1}}
  .hero p.lead{font-size:18px;color:var(--muted);max-width:620px;margin:22px 0 10px}
  .hero p.zh{color:var(--muted);margin:0 0 32px;font-size:15px}
  .btn{display:inline-block;background:var(--field);color:#fff;text-decoration:none;padding:13px 24px;border-radius:4px;font-weight:500;font-size:15px}
  .btn:hover{background:var(--wheat)}
  .btn.ghost{background:transparent;color:var(--field);border:1px solid var(--field);margin-left:10px}
  @media(max-width:480px){.btn.ghost{margin:12px 0 0}}
  /* sections */
  section{padding:80px 0}
  .sec-head{max-width:640px;margin-bottom:44px}
  .sec-head h2{font-size:clamp(30px,4vw,42px);color:var(--field)}
  .sec-head p{color:var(--muted);margin:12px 0 0}
  .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
  @media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:600px){.grid{grid-template-columns:1fr}}
  .card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px 24px}
  .card .ico{width:38px;height:38px;border-radius:50%;background:var(--wheat-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
  .card .ico svg{width:20px;height:20px;stroke:var(--earth);fill:none;stroke-width:1.6}
  .card h3{font-size:24px;margin-bottom:4px}
  .card .zh{font-size:13px;color:#C9760F;margin-bottom:10px;display:block}
  .card p{margin:0;color:var(--muted);font-size:15px}
  /* steps */
  .alt{background:#F4F7F5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;counter-reset:s}
  @media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:520px){.steps{grid-template-columns:1fr}}
  .step{border-top:2px solid var(--wheat);padding-top:18px}
  .step::before{counter-increment:s;content:"0" counter(s);font-family:"DM Sans",Arial,sans-serif;font-size:34px;color:var(--wheat);display:block;line-height:1}
  .step h3{font-size:22px;margin:10px 0 6px}
  .step p{margin:0;color:var(--muted);font-size:15px}
  /* who */
  .two{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}
  @media(max-width:820px){.two{grid-template-columns:1fr}}
  .list{list-style:none;margin:0;padding:0}
  .list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:12px}
  .list li::before{content:"";flex:0 0 8px;height:8px;margin-top:9px;border-radius:50%;background:var(--wheat)}
  .note{background:var(--wheat-soft);border-radius:6px;padding:28px}
  .note h3{font-size:24px;margin-bottom:8px}
  .note p{margin:0 0 10px;color:#4f463a;font-size:15px}
  /* contact */
  .contact{background:var(--field);color:#f4efe4;text-align:center}
  .contact h2{font-size:clamp(30px,4vw,44px);color:#fff}
  .contact p{color:#d8d2c3;max-width:560px;margin:14px auto 28px}
  .contact .btn{background:var(--wheat);color:#fff;font-weight:600}
  .contact .btn:hover{background:#C9760F}
  .contact .mail{display:block;margin-top:16px;font-size:14px;color:#d8d2c3}
  footer{padding:28px 0;font-size:13px;color:var(--muted)}
  footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

  /* books */
  .books{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
  @media(max-width:900px){.books{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:560px){.books{grid-template-columns:1fr}}
  .book{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;display:flex;flex-direction:column}
  .cover{aspect-ratio:2/3;background:var(--wheat-soft);display:flex;align-items:center;justify-content:center;overflow:hidden}
  .cover img{width:100%;height:100%;object-fit:cover;display:block}
  .cover .ph{width:100%;height:100%;background:var(--field);color:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:24px;border:8px solid #fff;outline:1px solid var(--wheat);outline-offset:-14px}
  .cover .ph b{font-family:"DM Sans",Arial,sans-serif;font-size:26px;line-height:1.15;font-weight:600}
  .cover .ph i{font-style:normal;color:var(--wheat);font-size:13px;letter-spacing:1px;margin-top:12px}
  .book-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
  .tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
  .tag{font-size:11px;letter-spacing:.5px;text-transform:uppercase;background:var(--wheat-soft);color:#9A5A08;padding:3px 8px;border-radius:20px}
  .book h3{font-size:24px;color:var(--field)}
  .book .by{color:var(--muted);font-size:14px;margin:2px 0 10px}
  .book .desc{color:#4b4a48;font-size:15px;margin:0}
  .book .more{background:none;border:none;color:var(--field);padding:6px 0 0;font:inherit;font-size:14px;cursor:pointer;text-align:left;text-decoration:underline}
  .buy{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:16px}
  .buy a{font-size:13px;text-decoration:none;border:1px solid var(--field);color:var(--field);padding:7px 12px;border-radius:4px}
  .buy a:first-child{background:var(--field);color:#fff}
  .feature{display:grid;grid-template-columns:260px 1fr;gap:40px;background:#fff;border:1px solid var(--line);border-radius:6px;padding:32px;margin-bottom:48px}
  @media(max-width:700px){.feature{grid-template-columns:1fr;padding:22px}}
  .feature .cover{border-radius:4px}
  .feature h3{font-size:34px;color:var(--field)}
  .feature .desc{font-size:16px}
  .kicker{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#C9760F;font-weight:600;margin-bottom:8px}
  .empty{text-align:center;background:#fff;border:1px dashed var(--wheat);border-radius:6px;padding:48px 24px}
  .empty h3{font-size:30px;color:var(--field)}
  .empty p{color:var(--muted);max-width:520px;margin:10px auto 22px}
  .filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
  .filters button{font:inherit;font-size:14px;background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:20px;cursor:pointer;color:var(--muted)}
  .filters button.on{background:var(--field);color:#fff;border-color:var(--field)}
  .center{text-align:center;margin-top:32px}

  .hero h1{letter-spacing:-.03em}
  .contact{background:#1F4D3A}
  .cover .ph{background:#1F4D3A;border-color:#fff;outline-color:var(--wheat)}
  /* detail pages, authors, journal */
  .page{padding:40px 0 80px}
  .back{font-size:14px;color:var(--muted);text-decoration:none}
  .back:hover{color:var(--field)}
  .article-title{font-size:clamp(32px,4.5vw,48px);color:var(--field);margin:6px 0 8px}
  .subtitle{font-size:18px;color:var(--muted);margin-bottom:6px}
  .meta{font-size:14px;color:var(--muted)}
  .meta a{color:var(--field)}
  .article{max-width:680px;margin-top:22px}
  .article p{font-size:17px;line-height:1.8;margin:0 0 18px}
  .book-detail{display:grid;grid-template-columns:300px 1fr;gap:48px;margin-top:28px;align-items:start}
  @media(max-width:760px){.book-detail{grid-template-columns:1fr;gap:24px}.book-detail .cover{max-width:260px}}
  .book-detail .cover{border-radius:6px;box-shadow:0 12px 30px rgba(0,0,0,.15)}
  .voice{margin:56px 0 0;padding:40px;background:var(--wheat-soft);border-left:4px solid var(--wheat);border-radius:6px}
  .voice blockquote{margin:10px 0 12px;font-size:22px;line-height:1.55;color:var(--field);font-weight:500}
  .about-author{display:flex;gap:24px;align-items:flex-start;margin:48px 0 0;padding:28px;border:1px solid var(--line);border-radius:10px}
  .about-author h3{font-size:22px;color:var(--field);margin:2px 0 6px}
  .about-author p{margin:0 0 8px;color:var(--muted)}
  .avatar{border-radius:50%;object-fit:cover;flex:0 0 auto;display:block}
  .avatar.ph{background:var(--field);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
  h2.sub,h3.sub{font-size:24px;color:var(--field);margin:48px 0 18px}
  .author{padding:40px 0;border-bottom:1px solid var(--line)}
  .author-head{display:flex;gap:24px;align-items:center}
  .author-head h2{font-size:34px;color:var(--field)}
  .pull{margin:28px 0 0;padding:22px 26px;background:var(--wheat-soft);border-left:4px solid var(--wheat);font-size:20px;color:var(--field)}
  .mini-books{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:18px}
  .mini{text-decoration:none;font-size:14px;font-weight:500;color:var(--field)}
  .mini .cover{border-radius:4px;margin-bottom:8px}
  .mini .cover .ph b{font-size:16px}
  .mini .cover .ph{border-width:5px;padding:12px}
  .posts{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
  @media(max-width:700px){.posts{grid-template-columns:1fr}}
  .post-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px}
  .post-card h3{font-size:22px;margin:4px 0 6px}
  .post-card h3 a{text-decoration:none;color:var(--field)}
  .post-card p{color:var(--muted);font-size:15px;margin:10px 0}
  a.more{color:var(--field);font-size:14px;font-weight:500}
  .aside-book{display:grid;grid-template-columns:120px 1fr;gap:22px;margin-top:40px;padding:24px;border:1px solid var(--line);border-radius:10px;max-width:680px}
  .aside-book .cover .ph b{font-size:14px}.aside-book .cover .ph{border-width:4px;padding:8px}
  .aside-book h3{font-size:22px}.aside-book h3 a{text-decoration:none;color:var(--field)}
  .book a{text-decoration:none;color:inherit}
  .cover{background:#EEF2EF}.cover img{object-fit:contain}