/* ============ YeahMed · Minimal High-Tech Style ============ */
:root{
  --brand:#7C3AED;
  --brand-dark:#5B21B6;
  --brand-soft:#F3EEFD;
  --ink:#111827;
  --ink-2:#4B5563;
  --ink-3:#9CA3AF;
  --bg:#FFFFFF;
  --bg-alt:#F8F7FC;
  --line:#E9E7F2;
  --radius:16px;
  --max:1120px;
  --shadow:0 12px 40px rgba(124,58,237,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Helvetica Neue","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:var(--bg);
  line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* 语言切换：默认中文，html.en 显示英文 */
html:not(.en) .en{display:none}
html.en .zh{display:none}

/* ============ 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s}
.nav.scrolled{background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--max);margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between}
.brand img{height:30px;width:auto}
.nav-links{display:flex;gap:34px}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--ink-2);position:relative;padding:6px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);border-radius:2px;transition:width .25s}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang-btn{
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  width:44px;height:32px;border-radius:999px;font-size:12.5px;font-weight:600;
  cursor:pointer;transition:.2s;letter-spacing:.5px;
}
.lang-btn:hover{border-color:var(--brand);color:var(--brand)}
.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.menu-btn span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ============ 首屏 ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden}
.hero-photo{
  position:absolute;inset:0;pointer-events:none;
  background:url("assets/hero-bg.jpg") center 30%/cover no-repeat;
}
/* 白色渐变罩层：左侧压白保证文字可读，右侧尽量透出图片 */
.hero-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.96) 16%,rgba(255,255,255,.66) 44%,rgba(255,255,255,.18) 78%,rgba(255,255,255,.06) 100%);
}
.hero-bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(680px 420px at 82% 18%, rgba(124,58,237,.14), transparent 65%),
    radial-gradient(520px 380px at 8% 85%, rgba(124,58,237,.09), transparent 60%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(720px 480px at 70% 30%,#000 0%,transparent 75%);
          mask-image:radial-gradient(720px 480px at 70% 30%,#000 0%,transparent 75%);
}
.hero-content{position:relative;z-index:1;padding-top:110px;padding-bottom:80px}
.hero-kicker{font-size:12.5px;letter-spacing:4px;color:var(--brand);font-weight:600;margin-bottom:22px}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.22;font-weight:700;letter-spacing:-.5px}
.hero h1 .accent{
  background:linear-gradient(100deg,var(--brand),#A78BFA);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:var(--brand);
}
.hero-sub{max-width:620px;margin-top:26px;font-size:17px;color:var(--ink-2)}
.hero-cta{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;transition:.25s}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(124,58,237,.32)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-ghost{border:1.5px solid var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.hero-tags{display:flex;gap:12px;margin-top:52px;flex-wrap:wrap}
.tag{
  font-size:13px;color:var(--ink-2);background:rgba(255,255,255,.8);
  border:1px solid var(--line);border-radius:999px;padding:7px 18px;backdrop-filter:blur(6px);
}

/* ============ 通用 Section ============ */
.section{padding:110px 0}
.section-alt{background:var(--bg-alt)}
.section-head{margin-bottom:52px}
.kicker{font-size:12.5px;letter-spacing:3px;color:var(--brand);font-weight:600;margin-bottom:12px;text-transform:uppercase}
.section-head h2{font-size:clamp(28px,3.6vw,40px);font-weight:700;letter-spacing:-.4px}
.section-head h2::after{content:"";display:block;width:44px;height:3px;background:var(--brand);border-radius:3px;margin-top:18px}
.lead{max-width:820px;font-size:16.5px;color:var(--ink-2);margin-bottom:56px}

/* 卡片 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;transition:.3s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(124,58,237,.3)}
.card-icon{
  width:48px;height:48px;border-radius:12px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:22px;
}
.card h3{font-size:19px;margin-bottom:12px}
.card p{font-size:14.5px;color:var(--ink-2)}

/* 数据 */
.stats{
  margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;
}
.stat{padding:32px 24px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat strong{display:block;font-size:36px;font-weight:700;color:var(--brand);letter-spacing:-1px}
.stat span{font-size:13px;color:var(--ink-2)}

/* ============ 团队 ============ */
.member{display:grid;grid-template-columns:300px 1fr;gap:52px;align-items:start}
.member-reverse{margin-top:72px}
.member-photo{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);aspect-ratio:3/4;background:var(--brand-soft);
}
.member-photo img{width:100%;height:100%;object-fit:cover;object-position:top center}
.member-photo.avatar{display:flex;align-items:center;justify-content:center}
.member-photo.avatar span{font-size:64px;font-weight:700;color:var(--brand);opacity:.85}
.member h3{font-size:26px;letter-spacing:-.3px}
.member-title{color:var(--brand);font-weight:600;font-size:15px;margin:6px 0 26px}
.member h4{font-size:15px;margin:24px 0 10px;padding-left:12px;border-left:3px solid var(--brand)}
.member ul{list-style:none}
.member li{
  position:relative;padding-left:18px;font-size:14.5px;color:var(--ink-2);margin-bottom:10px;
}
.member li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;
  border-radius:50%;background:var(--brand);opacity:.55;
}

/* ============ 产品 / 管线 ============ */
.pipeline-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:44px 36px;overflow:hidden;transition:.3s;
}
.pipeline-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--brand),#C4B5FD);
}
.pipeline-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.pipeline-tag{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:2px;
  color:var(--brand);background:var(--brand-soft);border-radius:6px;padding:5px 12px;margin-bottom:20px;
}
.pipeline-card h3{font-size:21px;margin-bottom:14px}
.pipeline-card p{font-size:14.5px;color:var(--ink-2)}

/* 知识产权 */
.ip-module{margin-top:84px}
.ip-head{margin-bottom:30px}
.ip-head h3{font-size:22px}
.ip-head p{color:var(--ink-2);font-size:14.5px;margin-top:6px}
.patent-card{
  border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--radius);
  background:#fff;padding:36px 36px 30px;
}
.patent-badge{
  display:inline-block;font-size:12px;font-weight:600;color:#fff;background:var(--brand);
  border-radius:999px;padding:5px 16px;margin-bottom:16px;
}
.patent-card h4{font-size:18px;margin-bottom:24px}
.patent-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px 28px}
.patent-item{display:flex;flex-direction:column;gap:3px}
.patent-item .label{font-size:12px;color:var(--ink-3);letter-spacing:.5px}
.patent-item .value{font-size:14.5px;font-weight:600;color:var(--ink)}

/* ============ 认证 / 世界地图 ============ */
.map-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;box-shadow:var(--shadow);
}
.worldmap svg{width:100%;height:auto;display:block}
.worldmap path{fill:#E5E3EF;stroke:#fff;stroke-width:.6;transition:fill .3s}
/* 仅当容器带 .certified 类（即存在已获批认证）时，指定国家才显示品牌紫 */
.worldmap.certified path.hl,.worldmap.certified g.hl path{fill:var(--brand)}
.worldmap.certified path.hl:hover,.worldmap.certified g.hl:hover path{fill:var(--brand-dark)}

/* 图例 */
.cert-legend{display:flex;gap:26px;flex-wrap:wrap;margin:-18px 0 30px}
.legend-item{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-2)}
.dot{width:12px;height:12px;border-radius:50%;flex-shrink:0}
.dot-done{background:var(--brand)}
.dot-plan{background:#E5E3EF;border:1px solid #D8D4E6}

/* 区域认证清单 */
.hl-purple{color:var(--brand);font-weight:600}
.hl-gray{color:var(--ink-2);font-weight:600}
.cert-regions{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;align-items:start;
}
.cert-region{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px 18px;transition:.3s;
}
.cert-region:hover{box-shadow:var(--shadow);border-color:rgba(124,58,237,.3)}
.cert-region h3{
  display:flex;align-items:center;gap:9px;font-size:15.5px;letter-spacing:1px;
  color:var(--ink);margin-bottom:12px;
}
.cert-region h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand);flex-shrink:0}
.cert-region ul{list-style:none}
.cert-region li{
  display:flex;align-items:center;gap:10px;padding:8px 0;
  border-bottom:1px dashed var(--line);font-size:13.5px;color:var(--ink-2);
}
.cert-region li:last-child{border-bottom:none}
.cert-region li::before{content:"";width:7px;height:7px;border-radius:50%;background:#D9D5E8;flex-shrink:0}
.cert-region li.done::before{background:var(--brand)}
.cert-region li.done span,.cert-region li.done span span{color:var(--ink);font-weight:600}
.cert-region li em{
  font-style:normal;margin-left:auto;flex-shrink:0;
  font-size:11.5px;font-weight:700;letter-spacing:.5px;color:var(--ink-2);
  background:var(--bg-alt);border:1px solid var(--line);border-radius:6px;padding:2px 8px;
}
.cert-region li.done em{color:var(--brand);background:var(--brand-soft);border-color:rgba(124,58,237,.25)}

/* ============ 联系我们 ============ */
.contact-inner{text-align:center}
.contact-inner .section-head h2::after{margin-left:auto;margin-right:auto}
.contact-banner,.page-banner{
  border-radius:var(--radius);overflow:hidden;margin-bottom:48px;
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.contact-banner img,.page-banner img{width:100%;height:clamp(200px,30vw,360px);object-fit:cover;object-position:center;display:block}
.contact-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:left;
}
.contact-block{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:34px 30px;transition:.3s;
}
.contact-block:hover{box-shadow:var(--shadow);border-color:rgba(124,58,237,.3)}
.contact-block h4{font-size:13px;letter-spacing:2px;color:var(--brand);margin-bottom:14px;text-transform:uppercase}
.contact-block p{font-size:15px;color:var(--ink-2)}
.mail-link{color:var(--brand);font-weight:600;border-bottom:1.5px solid transparent;transition:.2s}
.mail-link:hover{border-bottom-color:var(--brand)}

/* ============ 页脚 ============ */
.footer{border-top:1px solid var(--line);padding:56px 0 44px;background:#FCFBFE}
.footer-inner{text-align:center}
.footer-logo{height:26px;margin:0 auto 20px;opacity:.9}
.footer-company{font-size:13px;color:var(--ink-2);margin-bottom:10px}
.footer-icp{font-size:12.5px;color:var(--ink-3)}
.footer-icp a{color:var(--ink-3);transition:.2s}
.footer-icp a:hover{color:var(--brand)}

/* ============ 区块背景图（产品页 / 公司页） ============ */
.section-photo-wrap{position:relative;overflow:hidden}
.section-photo{
  position:absolute;inset:0;pointer-events:none;
  background-position:center 30%;background-size:cover;background-repeat:no-repeat;
}
.section-photo.photo-products{background-image:url("assets/products-banner.png")}
.section-photo.photo-about{background-image:url("assets/about-bg.webp");background-position:center bottom}
.section-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,#fff 0%,rgba(255,255,255,.72) 11%,rgba(255,255,255,.8) 55%,rgba(255,255,255,.92) 100%);
}
.section-photo-wrap > .container{position:relative;z-index:1}

/* ============ 内页标题 ============ */
.page-head{padding:148px 0 26px;background:#fff}
.page-head .kicker{margin-bottom:14px}
.page-head h1{font-size:clamp(30px,4.2vw,44px);font-weight:700;letter-spacing:-.6px;line-height:1.25}
.section-tight{padding-top:64px}

/* ============ 首页分页导航 ============ */
.home-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.home-nav-item{
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  padding:28px 22px;transition:.3s;display:block;
}
.home-nav-item:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(124,58,237,.35)}
.home-nav-item .num{font-size:12px;font-weight:700;color:var(--brand);letter-spacing:1.5px}
.home-nav-item h3{font-size:17px;margin:12px 0 6px}
.home-nav-item p{font-size:13px;color:var(--ink-2)}

/* ============ 滚动渐显 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:900px){
  .grid-3,.grid-2,.contact-grid{grid-template-columns:1fr 1fr}
  .home-nav{grid-template-columns:1fr 1fr}
  .page-head{padding:130px 0 20px}
  .stats{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .member{grid-template-columns:1fr;gap:30px}
  .member-photo{max-width:340px}
}
@media (max-width:640px){
  .section{padding:78px 0}
  .nav-links{
    position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;
    gap:0;border-bottom:1px solid var(--line);padding:8px 24px;
    transform:translateY(-130%);transition:transform .35s;box-shadow:0 16px 32px rgba(17,24,39,.06);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:15px 0;border-bottom:1px solid var(--line);font-size:15.5px}
  .nav-links a:last-child{border-bottom:none}
  .menu-btn{display:flex}
  .grid-3,.grid-2,.contact-grid{grid-template-columns:1fr}
  .home-nav{grid-template-columns:1fr}
  .page-head{padding:118px 0 16px}
  .hero-cta .btn{width:100%}
  .hero-photo::after{background:linear-gradient(180deg,rgba(255,255,255,.9) 0%,rgba(255,255,255,.62) 55%,rgba(255,255,255,.42) 100%)}
  .patent-card{padding:28px 22px}
  .map-wrap{padding:16px}
}