/* =========================================================
   Homgen Biotech 官网样式  ·  蓝白绿简约风
   --------------------------------------------------------
   色板：
     --c-primary  #1a6fb5 主蓝
     --c-deep     #163d7a 深蓝
     --c-accent   #2ea55a 活力绿
     --c-ink      #2a3b4d  正文
     --c-muted    #6b7785  次要文字
     --c-line     #e3e8ed  分隔线
     --c-bg       #f6f9fb  浅灰背景
========================================================= */

:root{
  --c-primary:#1a6fb5;
  --c-deep:#163d7a;
  --c-accent:#2ea55a;
  --c-ink:#2a3b4d;
  --c-muted:#6b7785;
  --c-line:#e3e8ed;
  --c-bg:#f6f9fb;
  --c-white:#ffffff;
  /* 品牌蓝→青→绿渐变（全站大色块唯一权威来源） */
  --grad-brand:linear-gradient(135deg,#1a4f9c 0%,#1d7d8e 50%,#2ea55a 100%);
  --grad-deep:linear-gradient(135deg,#0f2c57 0%,#0b4a3c 100%);
  --shadow-sm:0 1px 3px rgba(26,79,156,.06);
  --shadow-md:0 6px 20px rgba(26,79,156,.10);
  --radius:6px;
  --max-w:1200px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--c-ink);
  background:var(--c-white);
  line-height:1.7;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--c-deep)}
ul{list-style:none}

/* ---------- 通用容器 ---------- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section--bg{background:var(--c-bg)}
.section--deep{background:var(--grad-brand);color:#fff}
.section--deep h2,.section--deep h3{color:#fff}

h1,h2,h3,h4{color:var(--c-deep);font-weight:700;line-height:1.3}
h2.section-title{
  font-size:30px;text-align:center;margin-bottom:14px;
}
.section-subtitle{
  text-align:center;color:var(--c-muted);
  max-width:760px;margin:0 auto 48px;font-size:16px;
}
.section-title::after{
  content:"";display:block;width:54px;height:3px;
  background:var(--grad-brand);margin:14px auto 0;border-radius:2px;
}

/* ---------- 顶部 Topbar ---------- */
.topbar{
  background:var(--grad-deep);color:#cdd9e5;font-size:13px;
  padding:6px 0;
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px}
.topbar a{color:#cdd9e5}
.topbar a:hover{color:#fff}
.topbar__contact span{margin-right:18px}
.topbar__lang a{margin-left:14px;padding:2px 10px;border-radius:3px}
.topbar__lang a.active{background:var(--c-accent);color:#fff}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;background:#fff;
  border-bottom:1px solid var(--c-line);box-shadow:var(--shadow-sm);
}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav__brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--c-deep)}
.nav__brand .logo-img{
  height:44px;width:auto;display:block;
}
.nav__brand small{display:block;font-size:11px;color:var(--c-muted);font-weight:400;letter-spacing:.5px}
.nav__menu{display:flex;gap:32px;align-items:center}
.nav__menu a{
  color:var(--c-ink);font-size:16px;font-weight:500;position:relative;padding:6px 0
}
.nav__menu a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;
  background:linear-gradient(90deg,#1a4f9c,#2ea55a);transition:width .25s
}
.nav__menu a:hover::after,.nav__menu a.active::after{width:100%}
.nav__menu a.active{color:var(--c-primary)}
.nav__toggle{display:none;background:none;border:0;cursor:pointer;padding:6px}
.nav__toggle span{display:block;width:26px;height:2px;background:var(--c-deep);margin:5px 0;transition:.3s}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(circle at 78% 22%,rgba(255,255,255,.16),transparent 46%),
    var(--grad-brand);
  color:#fff;padding:96px 0;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-80px;top:-80px;
  width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.14),transparent 70%);
}
.hero__inner{position:relative;z-index:2;max-width:680px}
.hero__inner>*:last-child{margin-bottom:0}
.hero__slogan{
  display:inline-block;padding:6px 16px;border:1px solid rgba(255,255,255,.4);
  border-radius:30px;font-size:14px;color:#cfe5ff;margin-bottom:24px
}
.hero h1{font-size:46px;line-height:1.25;color:#fff;margin-bottom:18px}
.hero p{font-size:18px;color:#dbe7f5;margin-bottom:32px;max-width:560px}
.btn{display:inline-block;padding:12px 28px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;border:0;transition:transform .2s,box-shadow .2s}
.btn--primary{background:var(--grad-brand);color:#fff;background-size:160% 160%}
.btn--primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px rgba(29,125,142,.35)}
.btn--blue{background:var(--c-accent);color:#fff}
.btn--blue:hover{color:#fff;background:#248a4b}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:28px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--c-primary)}
.card__icon{
  width:56px;height:56px;border-radius:12px;
  background:linear-gradient(135deg,rgba(26,79,156,.12),rgba(46,165,90,.16));
  color:var(--c-primary);font-size:26px;
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
  overflow:hidden
}
.card__icon img{display:none;width:100%;height:100%;object-fit:contain}
.card__icon.has-img{background:#fff;padding:4px}
.card__icon.has-img img{display:block}
.card__icon.has-img .ph-fallback{display:none}
.card h3{font-size:20px;margin-bottom:10px}
.card p{color:var(--c-muted);font-size:15px;margin-bottom:14px}
.card .more{font-size:14px;font-weight:600;color:var(--c-primary)}

/* ---------- 产品卡 ---------- */
.product{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s;
  display:flex;flex-direction:column
}
.product:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.product__media{aspect-ratio:4/3;background:linear-gradient(135deg,#eef4fa,#e7f5ec);display:flex;align-items:center;justify-content:center;color:var(--c-primary);font-size:14px;overflow:hidden}
.product__media img{display:none;width:100%;height:100%;object-fit:cover}
.product__media.has-img img{display:block}
.product__media.has-img .ph-fallback{display:none}
/* 后台可替换的单图占位（如自动化工作站大图）*/
.ph-img{background:linear-gradient(135deg,#eef4fa,#e7f5ec);display:flex;align-items:center;justify-content:center;color:var(--c-primary);font-weight:600;overflow:hidden}
.ph-img--43{aspect-ratio:4/3;border-radius:8px}
.ph-img img{display:none;width:100%;height:100%;object-fit:contain;background:#fff}
.ph-img.has-img img{display:block}
.ph-img.has-img .ph-fallback{display:none}
/* 绑定了 PDF 说明书的产品卡：整卡可点击 */
[data-pdf]{cursor:pointer}
.pdf-go{display:none;font-size:13px;font-weight:600;color:var(--c-primary);margin-top:4px;text-decoration:none}
.pdf-go:hover{text-decoration:underline}
[data-pdf] .pdf-go{display:inline-block}
.product__body{padding:22px;flex:1;display:flex;flex-direction:column}
.product__tag{
  display:inline-block;background:rgba(46,165,90,.12);color:#1c7a42;
  font-size:12px;padding:3px 10px;border-radius:20px;margin-bottom:10px;width:fit-content
}
.product h3{font-size:19px;margin-bottom:8px}
.product p{color:var(--c-muted);font-size:14px;margin-bottom:16px;flex:1}
.product .more{font-size:14px;font-weight:600}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:24px;counter-reset:step}
.step{position:relative;padding:32px 24px;background:#fff;border-radius:var(--radius);border:1px solid var(--c-line);text-align:center}
.step::before{counter-increment:step;content:counter(step);display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:50%;margin:0 auto 16px;background:var(--grad-brand);color:#fff;font-weight:700;font-size:20px}
.step h4{font-size:17px;margin-bottom:8px}
.step p{color:var(--c-muted);font-size:14px}

/* ---------- 下载列表 ---------- */
.download-list{display:flex;flex-direction:column;gap:14px}
.download-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:18px 22px;transition:border-color .2s,box-shadow .2s
}
.download-item:hover{border-color:var(--c-primary);box-shadow:var(--shadow-sm)}
.download-item__title{font-weight:600;color:var(--c-deep);margin-bottom:4px}
.download-item__meta{font-size:13px;color:var(--c-muted)}
.download-item__icon{font-size:30px;color:var(--c-primary)}

/* ---------- 表单 ---------- */
.form{max-width:720px;margin:0 auto;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow-sm)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form__group{margin-bottom:18px}
.form__group label{display:block;font-weight:600;color:var(--c-deep);margin-bottom:6px;font-size:14px}
.form__group label .req{color:#e03b3b}
.form__group input,.form__group select,.form__group textarea{
  width:100%;padding:11px 14px;border:1px solid var(--c-line);border-radius:var(--radius);
  font-size:15px;color:var(--c-ink);background:#fff;transition:border-color .2s;font-family:inherit
}
.form__group input:focus,.form__group select:focus,.form__group textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(26,111,181,.12)
}
.form__group textarea{resize:vertical;min-height:110px}
.form__msg{margin-top:14px;padding:12px 16px;border-radius:var(--radius);font-size:14px;display:none}
.form__msg--ok{background:rgba(46,165,90,.12);color:#1c7a42;display:block}
.form__msg--err{background:rgba(224,59,59,.1);color:#a32323;display:block}
.form__note{font-size:13px;color:var(--c-muted);margin-top:8px}

/* ---------- Footer ---------- */
.footer{background:var(--grad-deep);color:#cdd9e5;padding:60px 0 24px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer__brand{font-size:22px;font-weight:700;color:#fff;margin-bottom:10px}
.footer__slogan{color:var(--c-accent);font-size:14px;margin-bottom:14px}
.footer__about{font-size:14px;color:#9fb1c5;line-height:1.8}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer ul li{margin-bottom:8px;font-size:14px}
.footer ul li a{color:#9fb1c5}
.footer ul li a:hover{color:#fff}
.footer__bottom{padding-top:18px;font-size:13px;color:#9fb1c5;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer__bottom a{color:#9fb1c5}

/* ---------- 内容页标题区 ---------- */
.page-header{
  background:
    radial-gradient(circle at 80% 20%,rgba(255,255,255,.14),transparent 45%),
    var(--grad-brand);
  color:#fff;padding:64px 0;text-align:center
}
.page-header h1{color:#fff;font-size:34px;margin-bottom:10px}
.page-header p{color:#dbe7f5;font-size:16px;max-width:680px;margin:0 auto}
.breadcrumb{font-size:13px;color:var(--c-muted);text-align:center;margin-top:14px}
.breadcrumb a{color:#9fb1c5}
.breadcrumb span{margin:0 6px}

/* ---------- 通用文章 ---------- */
.article{max-width:860px;margin:0 auto;font-size:16px;line-height:1.8}
.article h2{margin:30px 0 14px;font-size:24px}
.article h3{margin:24px 0 10px;font-size:19px}
.article p{margin-bottom:14px;color:#41505f}
.article ul{margin:0 0 14px 22px;list-style:disc}
.article ul li{margin-bottom:6px}

/* ---------- 联系信息卡 ---------- */
.contact-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm)
}
.contact-card h3{font-size:18px;color:var(--c-deep);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--c-accent);display:inline-block}
.contact-card p{margin-bottom:10px;font-size:15px}
.contact-card p strong{display:inline-block;width:90px;color:var(--c-muted);font-weight:600}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav__menu{display:none}
  .nav__brand .logo-img{height:34px}
  .nav__toggle{display:block}
  .nav__menu.open{
    display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;
    background:#fff;padding:18px 24px;border-bottom:1px solid var(--c-line);gap:14px;box-shadow:var(--shadow-md)
  }
  .hero{padding:64px 0}
  .hero h1{font-size:32px}
  .hero p{font-size:16px}
  .grid--3,.grid--2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .form__row{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:24px}
  .section{padding:48px 0}
  h2.section-title{font-size:24px}
  .topbar__contact{display:none}
}