:root{
  --brand-a:#ffa14a;
  --brand-b:#ff6f91;
  --ink:#303133;
  --muted:#8a8f99;
  --bg:#fff7f0;
  --card:#ffffff;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;}
a{color:inherit;text-decoration:none;}
.btn{display:inline-block;padding:12px 26px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;transition:transform .15s,box-shadow .15s;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:linear-gradient(135deg,var(--brand-a),var(--brand-b));color:#fff;box-shadow:0 8px 20px rgba(255,120,120,.35);}
.btn-ghost{background:#fff;color:#e0631f;border:1px solid #ffd6b3;}
.btn-lg{padding:16px 44px;font-size:18px;font-weight:700;}

/* 导航 */
.nav{position:sticky;top:0;z-index:10;background:rgba(255,247,240,.9);backdrop-filter:blur(8px);border-bottom:1px solid #ffe3d1;}
.nav-inner{max-width:1080px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;}
.brand{font-size:20px;font-weight:800;}
.nav-links a{margin-left:22px;color:var(--muted);font-size:15px;}
.nav-links a:hover{color:#e0631f;}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:40px;background:#fff;border:1px solid #ffd6b3;border-radius:10px;cursor:pointer;padding:0;}
.nav-toggle span{display:block;width:22px;height:3px;background:#e0631f;border-radius:2px;margin:0 auto;}
.lang-toggle{display:inline-block;margin-left:22px;padding:6px 14px;border-radius:999px;border:1px solid #ffd6b3;background:#fff;color:#e0631f;font-size:14px;font-weight:700;text-decoration:none;cursor:pointer;transition:background .15s,color .15s,transform .15s;}
.lang-toggle:hover{background:#fff0e0;transform:translateY(-1px);}

/* Hero */
.hero{background:linear-gradient(135deg,var(--brand-a) 0%,var(--brand-b) 100%);color:#fff;padding:80px 20px 90px;text-align:center;}
.hero-inner{max-width:760px;margin:0 auto;}
.hero-badge{font-size:64px;}
.hero-title{font-size:46px;font-weight:800;letter-spacing:2px;margin-top:6px;}
.hero-sub{font-size:22px;margin-top:12px;opacity:.98;font-weight:600;}
.hero-tagline{font-size:15px;letter-spacing:3px;opacity:.9;margin-top:6px;}
.hero-points{list-style:none;margin:24px auto 0;max-width:560px;display:flex;flex-direction:column;gap:10px;padding:0;}
.hero-points li{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);border-radius:999px;padding:10px 18px;font-size:14.5px;}
.hero-cta{margin-top:30px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.hero-cta .btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.5);}

/* 通用区块 */
.section{max-width:1080px;margin:0 auto;padding:64px 20px;}
.section-alt{background:#fff;}
.section-title{text-align:center;font-size:30px;font-weight:800;}
.section-sub{text-align:center;color:var(--muted);margin-top:10px;}

/* 功能 */
.feature-grid{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;}
.feature-card{background:var(--card);border-radius:16px;padding:26px;box-shadow:0 6px 18px rgba(0,0,0,.05);}
.feature-card .fi{font-size:34px;}
.feature-card h3{margin:10px 0 8px;font-size:18px;}
.feature-card p{color:var(--muted);font-size:14px;}
/* PH2 */

/* 立即体验 */
.access-grid{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;}
.access-card{background:var(--bg);border-radius:16px;padding:30px;text-align:center;box-shadow:0 6px 18px rgba(0,0,0,.05);}
.access-card-primary{background:#fff;border:2px solid #ffd0bd;box-shadow:0 12px 30px rgba(255,120,120,.22);}
.access-icon{font-size:40px;}
.access-card h3{margin:10px 0;font-size:20px;}
.access-card p{color:var(--muted);font-size:14px;margin-bottom:16px;}
.qr-box{width:200px;height:200px;margin:0 auto 12px;border:1px solid #ffe3d1;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.qr-box img{width:100%;height:100%;object-fit:contain;}
.qr-fallback{color:var(--muted);font-size:13px;text-align:center;padding:10px;}
.qr-fallback code{color:#e0631f;font-size:12px;}
.qr-tip{color:var(--muted);font-size:13px;}

/* 书籍 */
.book-grid{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;}
.book-card{background:var(--card);border-radius:16px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.06);display:flex;flex-direction:column;}
.book-cover{height:200px;display:flex;align-items:center;justify-content:center;text-align:center;padding:20px;color:#fff;}
.book-cover span{font-size:22px;font-weight:800;text-shadow:0 2px 6px rgba(0,0,0,.2);}
.book-body{padding:18px;flex:1;display:flex;flex-direction:column;}
.book-title{font-size:17px;font-weight:700;}
.book-author{color:var(--muted);font-size:13px;margin:4px 0 14px;}
.book-body .btn{margin-top:auto;text-align:center;}

/* 文章 */
.article-grid{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;}
.article-card{background:var(--bg);border-radius:14px;padding:22px;box-shadow:0 6px 18px rgba(0,0,0,.05);display:block;transition:transform .15s,box-shadow .15s;}
.article-card:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(0,0,0,.1);}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px;}
.article-tag{display:inline-block;background:linear-gradient(135deg,var(--brand-a),var(--brand-b));color:#fff;font-size:12px;font-weight:700;letter-spacing:.5px;padding:5px 14px;border-radius:999px;box-shadow:0 3px 8px rgba(255,120,120,.3);}
.article-title{font-size:17px;font-weight:700;margin:10px 0 8px;}
.article-sum{color:var(--muted);font-size:14px;}
.article-more{color:#e0631f;font-size:13px;margin-top:12px;display:inline-block;}

/* 联系我们 */
.contact-grid{margin-top:36px;display:flex;flex-wrap:wrap;gap:40px;justify-content:center;align-items:flex-start;}
.contact-info{min-width:280px;flex:1;max-width:460px;}
.contact-line{font-size:16px;margin:12px 0;}
.contact-line a{color:#e0631f;}
.contact-line a:hover{text-decoration:underline;}
.footer-note{color:var(--muted);font-size:12px;margin-top:12px;}
.contact-qrs{display:flex;gap:28px;flex-wrap:wrap;justify-content:center;}
.qr-item{text-align:center;}
.wx-box{width:150px;height:150px;background:#fff;border:1px solid #ffe3d1;border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin:0 auto;}
.wx-box img{width:100%;height:100%;object-fit:contain;}
.qr-cap{margin-top:10px;color:var(--muted);font-size:14px;}

/* 页脚 */
.footer{background:#2b2b32;color:#cfd3da;text-align:center;padding:44px 20px 28px;}
.footer-brand{font-size:20px;font-weight:800;color:#fff;}
.footer-slogan{color:#cfd3da;font-size:14px;margin:8px 0 16px;}
.footer-links{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.footer-links a{color:#cfd3da;font-size:14px;}
.footer-links a:hover{color:#ffb37a;}
.copyright{color:#8a8f99;font-size:13px;margin-top:20px;}

@media(max-width:640px){
  .hero-title{font-size:36px;}
  .nav-inner{position:relative;}
  .nav-toggle{display:flex;}
  .nav-links{display:none;position:absolute;top:calc(100% + 8px);right:20px;flex-direction:column;background:#fff;border:1px solid #ffe3d1;border-radius:12px;box-shadow:0 10px 26px rgba(0,0,0,.12);padding:8px 6px;min-width:168px;z-index:20;}
  .nav-links.open{display:flex;}
  .nav-links a{margin:0;padding:11px 16px;font-size:15px;}
  .nav-links .lang-toggle{margin:8px 16px;align-self:flex-start;}
  .btn-lg{padding:14px 32px;font-size:16px;}
}