/* =========================================================
   贝美口腔 · 高端简约医疗风样式
   响应式：PC / 平板 / 移动端
   ========================================================= */
:root{
  --c-ink:#15303a;
  --c-body:#3c4d55;
  --c-muted:#6d7e86;
  --c-primary:#15727d;
  --c-primary-d:#0e525a;
  --c-primary-l:#e8f2f3;
  --c-accent:#b8893b;
  --c-bg:#ffffff;
  --c-soft:#f4f8f9;
  --c-soft-2:#eef4f5;
  --c-line:#e3eaec;
  --c-dark:#0f2630;
  --c-dark-2:#16323d;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-serif:"Songti SC","STSong","Noto Serif SC",Georgia,"Times New Roman",serif;
  --maxw:1180px;
  --radius:14px;
  --shadow:0 10px 30px rgba(21,48,58,.08);
  --shadow-sm:0 4px 16px rgba(21,48,58,.06);
  --header-h:72px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--c-body);
  background:var(--c-bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s;}
a:hover{color:var(--c-primary-d);}
h1,h2,h3,h4{color:var(--c-ink);line-height:1.3;font-weight:700;margin:0 0 .5em;}
h1{font-size:clamp(28px,5vw,46px);letter-spacing:.5px;}
h2{font-size:clamp(24px,3.4vw,34px);}
h3{font-size:clamp(18px,2.2vw,22px);}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.2em;}
li{margin:.25em 0;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.container-narrow{max-width:880px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  padding:.85em 1.6em;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.22s;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--c-primary-d);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-line);}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
.btn-light{background:#fff;color:var(--c-primary-d);}
.btn-light:hover{background:var(--c-soft);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--c-line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--c-ink);}
.brand .logo{width:34px;height:34px;flex:0 0 auto;}
.brand .name{font-size:19px;letter-spacing:1px;}
.brand .name small{display:block;font-size:10px;letter-spacing:3px;color:var(--c-muted);font-weight:600;}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.nav-links a{
  display:block;padding:.6em .85em;border-radius:8px;color:var(--c-body);
  font-size:14.5px;font-weight:500;position:relative;
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-soft);}
.nav-links a.active{color:var(--c-primary);font-weight:700;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px;}
.nav-toggle span{width:24px;height:2px;background:var(--c-ink);border-radius:2px;transition:.25s;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 通用区块 ---------- */
section{padding:clamp(56px,8vw,96px) 0;}
.section-soft{background:var(--c-soft);}
.section-dark{background:var(--c-dark);color:#cfe0e4;}
.section-dark h1,.section-dark h2,.section-dark h3{color:#fff;}
.section-dark p{color:#bcd1d6;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:3px;text-transform:uppercase;
  color:var(--c-primary);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--c-primary);display:inline-block;}
.section-head{max-width:760px;margin:0 auto clamp(32px,5vw,52px);text-align:center;}
.section-head .lead{color:var(--c-muted);font-size:16.5px;margin-top:12px;}
.section-head.left{margin-left:0;text-align:left;}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:clamp(520px,82vh,760px);display:flex;align-items:center;overflow:hidden;}
.hero-bg{position:absolute;inset:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(15,38,48,.86) 0%,rgba(15,38,48,.6) 45%,rgba(15,38,48,.2) 100%);}
.hero .container{position:relative;z-index:2;color:#fff;}
.hero h1{color:#fff;font-family:var(--font-serif);font-weight:600;max-width:16em;}
.hero .sub{font-size:clamp(16px,2vw,19px);color:#dceb;color:#d8e6e9;max-width:34em;margin:18px 0 28px;}
.hero .hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.hero-badges{display:flex;gap:28px;flex-wrap:wrap;margin-top:40px;}
.hero-badges .b{display:flex;flex-direction:column;}
.hero-badges .b b{font-size:26px;color:#fff;font-family:var(--font-serif);}
.hero-badges .b span{font-size:13px;color:#a9c3c9;letter-spacing:1px;}

/* ---------- 卡片/栅格 ---------- */
.grid{display:grid;gap:24px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:.25s;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0e2;}
.card .ic{width:48px;height:48px;border-radius:12px;background:var(--c-primary-l);display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--c-primary);}
.card h3{margin-bottom:8px;}
.card p{color:var(--c-muted);font-size:15px;margin:0;}
.card .more{display:inline-block;margin-top:14px;font-weight:600;font-size:14px;}

/* 特色服务列表 */
.feature{display:flex;gap:18px;align-items:flex-start;}
.feature .num{
  flex:0 0 auto;width:46px;height:46px;border-radius:12px;background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-size:20px;font-weight:600;
}
.feature h3{margin:.1em 0 .35em;}
.feature p{color:var(--c-muted);margin:0;font-size:15px;}

/* 步骤 */
.steps{counter-reset:s;}
.step{position:relative;padding:22px 22px 22px 74px;border:1px solid var(--c-line);border-radius:var(--radius);background:#fff;}
.step::before{
  counter-increment:s;content:counter(s);position:absolute;left:22px;top:22px;
  width:38px;height:38px;border-radius:50%;background:var(--c-primary-l);color:var(--c-primary-d);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--font-serif);
}
.step h3{margin:0 0 6px;}
.step p{margin:0;color:var(--c-muted);font-size:14.5px;}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;text-align:center;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;}
.stats .s{padding:30px 16px;border-right:1px solid var(--c-line);}
.stats .s:last-child{border-right:0;}
.stats .s b{display:block;font-size:32px;color:var(--c-primary);font-family:var(--font-serif);}
.stats .s span{font-size:13.5px;color:var(--c-muted);letter-spacing:1px;}

/* ---------- 医师团队 ---------- */
.doctor{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;}
.doctor:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.doctor .photo{aspect-ratio:4/5;overflow:hidden;background:var(--c-soft);}
.doctor .photo img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.doctor:hover .photo img{transform:scale(1.04);}
.doctor .info{padding:20px 22px 24px;}
.doctor .info h3{margin:0 0 4px;font-size:19px;}
.doctor .role{color:var(--c-primary);font-weight:600;font-size:13.5px;margin-bottom:12px;letter-spacing:.5px;}
.doctor .info p{color:var(--c-muted);font-size:14px;margin:0 0 10px;}
.tags{display:flex;flex-wrap:wrap;gap:6px;}
.tags span{font-size:12px;background:var(--c-soft);color:var(--c-primary-d);padding:3px 9px;border-radius:999px;border:1px solid var(--c-line);}

/* ---------- 环境图廊 ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.gallery figure{margin:0;border-radius:var(--radius);overflow:hidden;position:relative;background:var(--c-soft);aspect-ratio:4/3;}
.gallery img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.gallery figure:hover img{transform:scale(1.05);}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;color:#fff;font-size:13.5px;background:linear-gradient(0deg,rgba(15,38,48,.78),transparent);}
.gallery.tall{grid-template-columns:repeat(4,1fr);}
.gallery.tall figure{aspect-ratio:3/4;}

/* ---------- 科普文章 ---------- */
.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.article-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--c-soft);}
.article-card .thumb img{width:100%;height:100%;object-fit:cover;}
.article-card .body{padding:22px 24px 26px;flex:1;display:flex;flex-direction:column;}
.article-card .cat{font-size:12px;letter-spacing:1px;color:var(--c-accent);font-weight:700;text-transform:uppercase;}
.article-card h3{font-size:19px;margin:8px 0 10px;}
.article-card p{color:var(--c-muted);font-size:14.5px;flex:1;}
.article-card .read{font-weight:600;font-size:14px;margin-top:14px;}

/* 科普正文 */
.prose{max-width:820px;margin:0 auto;}
.prose h2{margin-top:1.6em;border-left:4px solid var(--c-primary);padding-left:14px;}
.prose h3{margin-top:1.3em;color:var(--c-primary-d);}
.prose ul{color:var(--c-body);}
.callout{background:var(--c-primary-l);border-left:4px solid var(--c-primary);border-radius:10px;padding:18px 22px;margin:22px 0;color:var(--c-primary-d);}
.callout b{color:var(--c-primary-d);}

/* ---------- 到院指南 / 联系 ---------- */
.branch{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);}
.branch .ph{position:relative;}
.branch .ph img{width:100%;height:240px;object-fit:cover;}
.branch .ph .tag{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.92);color:var(--c-primary-d);font-weight:700;padding:5px 12px;border-radius:999px;font-size:13px;}
.branch .body{padding:24px 26px 28px;}
.branch .body h3{margin:0 0 6px;}
.branch dl{margin:0;display:grid;grid-template-columns:84px 1fr;gap:10px 14px;}
.branch dt{color:var(--c-muted);font-size:14px;}
.branch dd{margin:0;font-size:15px;color:var(--c-ink);}
.branch .tel{display:inline-block;margin-top:14px;font-weight:700;color:var(--c-primary);font-size:17px;}

.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start;}
.info-list{list-style:none;margin:0;padding:0;}
.info-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--c-line);}
.info-list li:last-child{border-bottom:0;}
.info-list .k{flex:0 0 90px;color:var(--c-muted);font-size:14px;}
.info-list .v{color:var(--c-ink);}
.info-list .v a{font-weight:600;}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--c-line);border-radius:12px;background:#fff;margin-bottom:12px;overflow:hidden;}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--c-ink);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";font-size:22px;color:var(--c-primary);font-weight:400;transition:.2s;}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq .ans{padding:0 22px 20px;color:var(--c-muted);font-size:15px;}

/* ---------- 新闻资讯 ---------- */
.news-list{margin-top:8px;}
.news-cats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:30px;}
.news-cats .chip{font-size:13px;background:var(--c-soft);color:var(--c-primary-d);padding:6px 14px;border-radius:999px;border:1px solid var(--c-line);}
.article-card .meta-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;font-size:13px;color:var(--c-muted);}
.article-card .meta-row .read{font-weight:600;color:var(--c-primary);}
.article-card .ndate{white-space:nowrap;}

.news-detail{max-width:820px;margin:0 auto;}
.news-detail .news-meta{display:flex;align-items:center;flex-wrap:wrap;gap:14px;font-size:14px;color:var(--c-muted);margin:6px 0 14px;}
.news-detail .news-meta .cat{color:var(--c-accent);font-weight:700;letter-spacing:1px;font-size:12px;text-transform:uppercase;}
.news-detail .news-meta .src{color:var(--c-muted);}
.news-detail .news-title{font-size:clamp(24px,3.6vw,34px);line-height:1.3;margin:0 0 22px;color:var(--c-ink);}
.news-detail .news-cover{border-radius:var(--radius);overflow:hidden;margin:0 0 30px;background:var(--c-soft);aspect-ratio:16/9;}
.news-detail .news-cover img{width:100%;height:100%;object-fit:cover;}

/* 新闻分页 */
.news-pager{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:40px 0 8px;}
.news-pager .pg{
  min-width:42px;height:42px;padding:0 14px;border-radius:10px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-body);
  font-size:15px;font-weight:600;cursor:pointer;transition:.2s;
}
.news-pager .pg:hover{border-color:var(--c-primary);color:var(--c-primary);}
.news-pager .pg.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.news-pager .pg.prev,.news-pager .pg.next{color:var(--c-primary);}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13.5px;color:var(--c-muted);padding:18px 0 0;}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb span{margin:0 8px;color:var(--c-line);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:#a9c0c6;padding:60px 0 28px;font-size:14.5px;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.site-footer h4{color:#fff;font-size:16px;margin:0 0 16px;letter-spacing:1px;}
.site-footer a{color:#a9c0c6;}
.site-footer a:hover{color:#fff;}
.foot-links{list-style:none;margin:0;padding:0;}
.foot-links li{margin:0 0 10px;}
.foot-brand .name{color:#fff;font-size:20px;font-weight:800;letter-spacing:1px;}
.foot-brand p{color:#86a0a7;margin-top:12px;font-size:14px;}
.foot-contact div{margin-bottom:10px;}
.foot-contact b{color:#dceb;font-weight:600;}
.foot-bottom{border-top:1px solid #1d3a45;margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:#7d969d;font-size:13px;}
.disclaimer{background:#0b1f27;color:#86a0a7;font-size:12.5px;line-height:1.7;padding:16px 0;margin-top:30px;border-radius:10px;}
.disclaimer p{margin:0;}

/* 回到顶部 */
.totop{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--c-primary);color:#fff;border:0;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:var(--shadow);z-index:40;font-size:20px;}
.totop.show{display:flex;}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.reveal.in{opacity:1;transform:none;}

/* 跳过链接 */
.skip-link{position:absolute;left:-999px;top:0;background:var(--c-primary);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}

/* ============ 响应式 ============ */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .gallery{grid-template-columns:repeat(2,1fr);}
  .gallery.tall{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stats .s:nth-child(2){border-right:0;}
  .stats .s:nth-child(1),.stats .s:nth-child(2){border-bottom:1px solid var(--c-line);}
  .contact-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  .nav-toggle{display:flex;}
  .nav-links{
    position:absolute;top:var(--header-h);left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 18px;
    border-bottom:1px solid var(--c-line);box-shadow:var(--shadow);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav-links.open{max-height:520px;}
  .nav-links a{padding:.85em 1em;border-radius:8px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .gallery,.gallery.tall{grid-template-columns:1fr 1fr;}
  .hero-badges{gap:18px;}
  .hero-badges .b b{font-size:22px;}
  .container{padding:0 18px;}
  .foot-grid{grid-template-columns:1fr;gap:26px;}
}
@media (max-width:420px){
  .gallery,.gallery.tall{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .stats .s{border-right:0;border-bottom:1px solid var(--c-line);}
  .stats .s:last-child{border-bottom:0;}
  .hero .hero-actions{flex-direction:column;align-items:stretch;}
  .hero .hero-actions .btn{justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .reveal{opacity:1;transform:none;}
}