/* ============================================
   北京正和堂中医门诊部 - 官网通用样式
   ============================================ */
:root{
  --ink:#1f2d3d; --ink2:#4a5c6e; --ink3:#8a97a5;
  --line:#e6ebf1; --brand:#8c1d18; --brand-dark:#6d1410;
  --brand-soft:#fdf3f2; --gold:#b8935a;
  --bg:#fbfaf7; --card:#ffffff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:860px}

/* ---------- 顶部导航 ---------- */
.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none}
.logo-mark{width:40px;height:40px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;letter-spacing:1px}
.logo-txt b{display:block;font-size:17px;color:var(--ink);letter-spacing:1px;line-height:1.3}
.logo-txt span{font-size:11.5px;color:var(--ink3);letter-spacing:.5px}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{color:var(--ink2);font-size:15px;text-decoration:none;white-space:nowrap}
.nav-links a:hover{color:var(--brand)}
.nav-links a.on{color:var(--brand);font-weight:600}
.nav-cta{background:var(--brand);color:#fff!important;padding:9px 22px;border-radius:22px;
  font-size:14.5px;text-decoration:none!important}
.nav-cta:hover{background:var(--brand-dark)}
.menu-btn{display:none;background:none;border:none;font-size:23px;color:var(--brand);cursor:pointer}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(158deg,#8c1d18,#6d1410 60%,#5b100d);color:#fff;
  padding:76px 0 68px;text-align:center;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;
  border-radius:50%;background:rgba(255,255,255,.05)}
.hero h1{font-size:40px;letter-spacing:3px;margin-bottom:18px;font-weight:600;position:relative}
.hero .slogan{font-size:19px;letter-spacing:6px;opacity:.92;margin-bottom:26px;position:relative}
.hero .desc{font-size:15.5px;opacity:.85;max-width:660px;margin:0 auto 32px;line-height:2;position:relative}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}
.btn{display:inline-block;padding:13px 38px;border-radius:28px;font-size:15.5px;
  font-weight:500;text-decoration:none!important;transition:.2s}
.btn-primary{background:#fff;color:var(--brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(0,0,0,.22)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}

/* ---------- 通用 section ---------- */
main{padding:0 0 60px}
section{padding:56px 0}
section.tight{padding:40px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:28px;letter-spacing:2px;color:var(--ink);margin-bottom:12px;font-weight:600}
.sec-head p{color:var(--ink3);font-size:15px}
.sec-head::after{content:"";display:block;width:44px;height:3px;background:var(--gold);
  margin:16px auto 0}
.card{background:var(--card);border-radius:14px;border:1px solid var(--line);
  box-shadow:0 1px 4px rgba(0,0,0,.04)}
.pad{padding:32px 34px}

/* ---------- 特色/优势 ---------- */
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(228px,1fr));gap:20px}
.feat{padding:30px 26px;text-align:center;background:var(--card);border-radius:14px;
  border:1px solid var(--line);transition:.25s}
.feat:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(140,29,24,.09);
  border-color:#f0dcda}
.feat .ico{width:52px;height:52px;margin:0 auto 16px;border-radius:14px;
  background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;
  justify-content:center;font-size:23px}
.feat b{display:block;font-size:17px;margin-bottom:9px;color:var(--ink)}
.feat span{font-size:14px;color:var(--ink2);line-height:1.8}

/* ---------- 医生卡片 ---------- */
.docs{display:grid;grid-template-columns:repeat(auto-fit,minmax(252px,1fr));gap:22px}
.doc{background:var(--card);border-radius:14px;border:1px solid var(--line);
  overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.doc:hover{transform:translateY(-5px);box-shadow:0 14px 32px rgba(0,0,0,.1)}
.doc-top{background:linear-gradient(150deg,#8c1d18,#6d1410);padding:24px 22px 20px;color:#fff}
.doc-top .nm{font-size:21px;letter-spacing:2px;margin-bottom:7px;font-weight:600}
.doc-top .ti{font-size:13px;opacity:.9}
.doc-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.doc-body .lab{font-size:12.5px;color:var(--gold);letter-spacing:1px;margin-bottom:7px;font-weight:600}
.doc-body p{font-size:14px;color:var(--ink2);line-height:1.85;margin-bottom:14px}
.doc-body .time{font-size:13px;color:var(--ink3);margin-top:auto;padding-top:12px;
  border-top:1px dashed var(--line)}
.doc-link{display:block;text-align:center;background:var(--brand-soft);color:var(--brand);
  padding:11px;font-size:14.5px;font-weight:500;text-decoration:none!important;border-top:1px solid var(--line)}
.doc-link:hover{background:#fae8e6}

/* ---------- 科室/专题 ---------- */
.svcs{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:20px}
.svc{background:var(--card);border-radius:14px;border:1px solid var(--line);padding:28px 26px;
  transition:.25s;display:block;text-decoration:none!important;color:inherit}
.svc:hover{border-color:var(--brand);box-shadow:0 10px 26px rgba(140,29,24,.09);transform:translateY(-3px)}
.svc b{display:block;font-size:18px;color:var(--brand);margin-bottom:11px}
.svc p{font-size:14px;color:var(--ink2);line-height:1.85;margin-bottom:14px}
.svc .more{font-size:13.5px;color:var(--gold);font-weight:500}

/* ---------- 内容页（文章） ---------- */
.article{background:var(--card);border-radius:14px;border:1px solid var(--line);
  padding:40px 44px;margin-bottom:22px}
.article h1{font-size:29px;line-height:1.5;margin-bottom:16px;color:var(--ink);font-weight:600}
.article .meta{font-size:13.5px;color:var(--ink3);padding-bottom:20px;
  border-bottom:1px solid var(--line);margin-bottom:26px;line-height:1.9}
.article h2{font-size:21px;color:var(--brand);margin:34px 0 15px;padding-left:13px;
  border-left:4px solid var(--brand);line-height:1.4;font-weight:600}
.article h3{font-size:17px;margin:24px 0 11px;color:var(--ink)}
.article p{margin-bottom:15px;color:var(--ink2);line-height:1.95}
.article ul,.article ol{margin:12px 0 18px 22px;color:var(--ink2)}
.article li{margin-bottom:9px;line-height:1.9}
.article strong{color:var(--ink)}
.lead-box{background:var(--brand-soft);border-left:4px solid var(--brand);
  padding:18px 22px;border-radius:0 10px 10px 0;margin-bottom:26px}
.lead-box p{margin:0;color:var(--ink);font-size:15.5px;line-height:1.95}

/* ---------- FAQ ---------- */
details{border:1px solid var(--line);border-radius:10px;margin-bottom:11px;overflow:hidden;
  background:var(--card)}
summary{cursor:pointer;padding:16px 20px;font-weight:600;font-size:15.5px;
  list-style:none;position:relative;padding-right:46px;background:#fafbfc}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:20px;color:var(--brand);
  font-size:20px;font-weight:400;line-height:1}
details[open] summary::after{content:"−"}
details p{padding:16px 20px;margin:0;font-size:14.8px;color:var(--ink2);background:#fff}
details ol,details ul{padding:0 20px 14px 44px;margin:0;background:#fff;color:var(--ink2);font-size:14.8px}

/* ---------- 信息条 ---------- */
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0 30px}
.field{display:flex;padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px}
.field .k{width:104px;color:var(--ink3);flex-shrink:0;font-size:14px}
.field .v{color:var(--ink);font-weight:500}

/* ---------- 底部 ---------- */
footer{background:#2a2f36;color:#a8b2bd;padding:44px 0 26px;font-size:14px;line-height:2}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:28px;margin-bottom:28px}
footer b{display:block;color:#fff;font-size:15.5px;margin-bottom:13px;letter-spacing:1px}
footer a{color:#a8b2bd;text-decoration:none}
footer a:hover{color:#fff}
.copy{border-top:1px solid #3a4048;padding-top:20px;text-align:center;
  font-size:13px;color:#808a95;line-height:1.9}

/* ---------- 提示框 ---------- */
.notice{font-size:13px;color:#95a0ac;line-height:1.9;background:#f7f8fa;
  border-radius:10px;padding:18px 20px}

/* ---------- 面包屑 ---------- */
.crumb{font-size:13.5px;color:var(--ink3);padding:20px 0 0}
.crumb a{color:var(--ink3)}
.crumb a:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media(max-width:820px){
  .nav-links{display:none}
  .menu-btn{display:block}
  .nav-links.open{display:flex;position:absolute;top:70px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;border-bottom:1px solid var(--line);padding:8px 0}
  .nav-links.open a{padding:13px 24px;width:100%;border-bottom:1px solid var(--line)}
  .nav-links.open .nav-cta{margin:12px 24px;border-radius:22px;text-align:center;width:auto}
  .hero{padding:52px 0 46px}
  .hero h1{font-size:27px;letter-spacing:2px}
  .hero .slogan{font-size:15.5px;letter-spacing:3px}
  section{padding:40px 0}
  .sec-head h2{font-size:23px}
  .article{padding:26px 22px}
  .article h1{font-size:22px}
  .article h2{font-size:18.5px}
  .pad{padding:24px 20px}
  .field{flex-direction:column;gap:1px}
  .field .k{width:auto;font-size:13px}
}