/* Smooth Chemistry — 沿用原站结构，底层重写 */
:root{
  --accent:#9f27c6;
  --accent-dark:#82209f;
  --text:#000;
  --summary:#555;
  --line:#e5e5e5;
  --bg-soft:#f7f9fd;
  --max:1400px;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,"Roboto","Lato","Open Sans",sans-serif;color:var(--text);font-size:15px;line-height:1.7}
img{max-width:100%;display:block;border:0}
a{color:var(--text);text-decoration:none}
a:hover{color:var(--accent)}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3}
p{margin:0 0 14px}
.l-wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.header-top{background:#f8f8f8;font-size:13px;color:#5d5d5d;line-height:40px;border-bottom:1px solid #eee}
.header-top .l-wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.header-top a{color:#5d5d5d;margin-right:24px;display:inline-flex;align-items:center;gap:6px}
.header-top a:hover{color:var(--accent)}
.header-top a svg{width:14px;height:14px;stroke:var(--accent);fill:none;stroke-width:1.8;flex:0 0 auto}
.header-top .lang{color:#8c8c8c}

.header-main{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:60}
.header-main .l-wrap{display:flex;align-items:center;gap:14px;height:88px}
.logo img{height:52px;width:auto}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav>li{position:relative}
.nav>li>a{display:block;padding:30px 18px;font-size:16px;font-weight:700;color:#111;transition:.2s}
.nav>li>a:hover,.nav>li.active>a{color:var(--accent)}
.nav .sub{position:absolute;top:100%;left:0;min-width:210px;background:#fff;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(0,0,0,.08);padding:8px 0;display:none}
.nav li:hover .sub{display:block}
.nav .sub a{display:block;padding:10px 18px;font-size:14px;color:#333}
.nav .sub a:hover{background:#faf5fc;color:var(--accent)}
.hd-tel{display:flex;align-items:center;gap:8px;margin-left:14px;color:var(--accent);font-weight:700;font-size:15px;white-space:nowrap}

/* ---------- banner ---------- */
.home-banner{position:relative;overflow:hidden;background:#0d0d0d}
.home-banner .slides{position:relative}
.home-banner .slide{display:none;position:relative}
.home-banner .slide.on{display:block}
.home-banner .slide img{width:100%;height:auto}
.home-banner .dots{position:absolute;left:0;right:0;bottom:18px;display:flex;justify-content:center;gap:10px;z-index:3}
.home-banner .dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.55);cursor:pointer;padding:0}
.home-banner .dots button.on{background:var(--accent);width:26px;border-radius:6px}

/* ---------- home about ---------- */
.home-about{background:var(--bg-soft);padding:64px 0}
.home-about .l-wrap{display:flex;align-items:center;gap:56px}
.home-about .left{width:50%}
.home-about .left img{width:100%;border-radius:6px}
.home-about .right{width:50%}
.home-about h2{font-size:30px;margin-bottom:14px}
.home-about h2.hometitle{letter-spacing:.01em}
.home-about .sub-title{font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:14px}
.home-about p{color:var(--summary);font-size:15px;margin-bottom:12px}
.btn{display:inline-block;padding:12px 30px;background:var(--accent);color:#fff;border-radius:4px;font-size:15px;transition:.2s;border:0;cursor:pointer}
.btn:hover{background:var(--accent-dark);color:#fff}
.btn-ghost{background:transparent;border:1px solid var(--accent);color:var(--accent)}
.btn-ghost:hover{background:var(--accent);color:#fff}
.btn-sm{padding:9px 20px;font-size:14px}
.read-more{margin-top:10px}

/* ---------- home products ---------- */
.home-product{background:var(--bg-soft);padding:64px 0 72px}
.home-product .head{text-align:center;margin-bottom:36px}
.home-product .head .sub{font-size:13px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);font-weight:700}
.home-product .head h2{font-size:34px;margin-top:6px}
.pro-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pro-card{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.2s}
.pro-card:hover{box-shadow:0 10px 26px rgba(0,0,0,.08);transform:translateY(-3px)}
.pro-card .img{display:block;aspect-ratio:1/1;overflow:hidden;background:#fafafa}
.pro-card .img img{width:100%;height:100%;object-fit:cover;transition:.35s}
.pro-card:hover .img img{transform:scale(1.04)}
.pro-card .text{padding:16px 16px 20px}
.pro-card .name{font-size:15px;font-weight:700;line-height:1.45;display:block;margin-bottom:8px;min-height:44px}
.pro-card .desc{font-size:13px;color:var(--summary);line-height:1.6;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pro-card .cas{font-size:12px;color:#999}
.pro-card .more{font-size:13px;color:var(--accent);font-weight:700}

/* ---------- crumbs ---------- */
.crumbs{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.crumbs .l-wrap{padding-top:16px;padding-bottom:16px;font-size:13px;color:#888}
.crumbs h1{font-size:26px;margin-bottom:4px}
.crumbs a{color:#888}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{margin:0 6px;color:#bbb}

/* ---------- inner layout ---------- */
.common-main{padding:40px 0 70px}
.page-container{display:flex;gap:36px;align-items:flex-start}
.sidebar{width:270px;flex:0 0 270px}
.side-box{border:1px solid var(--line);border-radius:6px;margin-bottom:22px;overflow:hidden}
.side-box .title{background:var(--accent);color:#fff;font-size:17px;font-weight:700;padding:14px 18px}
.side-box ul{padding:8px 0}
.side-box li a{display:block;padding:11px 18px;font-size:14.5px;border-left:3px solid transparent}
.side-box li a:hover,.side-box li a.on{background:#faf5fc;border-left-color:var(--accent);color:var(--accent)}
.hot-list{padding:8px 0}
.hot-list li{display:flex;gap:10px;padding:10px 14px;align-items:center}
.hot-list img{width:62px;height:62px;object-fit:cover;border:1px solid var(--line);border-radius:4px;flex:0 0 62px}
.hot-list .t{font-size:13px;line-height:1.45}
.hot-list a:hover .t{color:var(--accent)}
.page-main{flex:1;min-width:0}
.page-main>h1,.page-main>h2{font-size:28px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}

/* ---------- product detail ---------- */
.product-detail{display:flex;gap:34px;align-items:flex-start;margin-bottom:34px}
.product-detail .gallery{width:44%;flex:0 0 44%}
.product-detail .gallery .main{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fafafa}
.product-detail .gallery .main img{width:100%;aspect-ratio:1/1;object-fit:cover}
.thumbs{display:flex;gap:8px;margin-top:10px}
.thumbs img{width:70px;height:70px;object-fit:cover;border:1px solid var(--line);border-radius:4px;cursor:pointer}
.thumbs img.on{border-color:var(--accent)}
.product-detail .info{flex:1;min-width:0}
.product-detail .info h1{font-size:26px;line-height:1.35;margin-bottom:10px}
.product-detail .info .cas{font-size:14px;color:#888;margin-bottom:16px}
.product-detail .info .lead{color:var(--summary);margin-bottom:18px}
.product-detail .info .btns{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}

/* ---------- spec table ---------- */
.spec-wrap{margin:34px 0}
.spec-wrap h3,.content-block h3{font-size:20px;margin-bottom:14px;padding-left:12px;border-left:4px solid var(--accent)}
table.spec{width:100%;border-collapse:collapse;border:1px solid var(--line);font-size:14.5px}
table.spec th{background:var(--bg-soft);text-align:left;padding:12px 16px;font-size:13px;color:#666;border-bottom:1px solid var(--line);width:38%}
table.spec td{padding:12px 16px;border-bottom:1px solid var(--line)}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
table.spec td:first-child{width:38%;font-weight:700;background:#fcfcfd}

.content-block{margin:34px 0}
.content-block p{color:#333;margin-bottom:12px}
.content-block ul{list-style:disc;padding-left:22px;margin-bottom:14px;color:#333}
.content-block li{margin-bottom:6px}
.content-block h4{font-size:16px;margin:20px 0 8px;color:#111}

/* ---------- about ---------- */
.about-content h2.company{font-size:22px;margin:8px 0 20px}
.about-content p{color:#333;margin-bottom:14px}
.about-cta{margin-top:40px;padding:34px 40px;background:var(--bg-soft);border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.about-cta h3{font-size:22px}
.about-cta p{color:var(--summary);margin:6px 0 0}

/* ---------- contact ---------- */
.contact-grid{display:flex;gap:40px;align-items:flex-start}
.contact-info{width:38%;flex:0 0 38%}
.contact-info .row{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--line)}
.contact-info .row:first-child{padding-top:0}
.contact-info .k{font-weight:700;font-size:14px;color:#111;width:92px;flex:0 0 92px}
.contact-info .v{font-size:14.5px;color:#444;word-break:break-word}
.contact-form{flex:1;border:1px solid var(--line);border-radius:8px;padding:28px;background:#fff}
.form-title{font-size:20px;font-weight:700;margin-bottom:6px}
.form-sub{font-size:13px;color:#888;margin-bottom:20px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:700;margin-bottom:6px}
.field input,.field textarea{width:100%;padding:11px 13px;border:1px solid #dcdcdc;border-radius:4px;font-size:14.5px;font-family:inherit}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--accent)}
.field textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0;overflow:hidden}
.form-note{font-size:12.5px;color:#999;margin-top:10px}
.form-ok{background:#f3fbf5;border:1px solid #cdebd4;color:#1d6b35;padding:12px 14px;border-radius:4px;font-size:14px;margin-bottom:14px}

/* ---------- footer ---------- */
.footer-top{background:var(--accent);padding:26px 0}
.footer-top .l-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer-top h3{font-size:26px;color:#fff;margin-bottom:6px}
.footer-top p{color:rgba(255,255,255,.85);margin:0;font-size:14px}
.footer-top .btn{background:#fff;color:var(--accent)}
.footer-top .btn:hover{background:#f3e6f7}

footer{background:#111a3a;color:#c8cdd6;font-size:14px;padding:44px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr .9fr .9fr 1.3fr .7fr;gap:32px;margin-bottom:34px}
footer h4{color:#fff;font-size:14.5px;margin-bottom:16px;text-transform:uppercase;letter-spacing:.06em}
footer a{color:#c8cdd6;display:block;margin-bottom:9px;font-size:14px}
footer a:hover{color:#fff}
footer p{color:#c8cdd6;font-size:14px;margin:0 0 8px;line-height:1.6}
footer p a{display:inline;color:#c8cdd6;margin:0}
footer p strong{color:#fff;font-weight:600}
.footer-brand .flogo{background:#fff;padding:6px 9px;border-radius:4px;height:46px;width:auto;margin-bottom:14px}
.footer-brand p{color:#9aa4b5;font-size:13.5px;line-height:1.7}
.footer-qr img{width:104px;height:104px;background:#fff;padding:4px;border-radius:4px;object-fit:contain}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px;color:#8d97a8}
.footer-bottom p{margin:0;color:#8d97a8;font-size:12.5px}
.footer-bottom a{display:inline;color:#8d97a8;margin-left:6px}
.gotop{position:fixed;right:16px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--accent);
  display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:85;box-shadow:0 6px 16px rgba(0,0,0,.2)}
.gotop svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:2}
.gotop:hover{background:var(--accent-dark)}

/* ---------- floating bar ---------- */
.float-bar{position:fixed;right:16px;bottom:84px;z-index:80;display:flex;flex-direction:column;gap:10px}
.float-bar a{width:48px;height:48px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(0,0,0,.18)}
.float-bar a:hover{background:var(--accent-dark)}
.float-bar svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:1.8}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .pro-grid{grid-template-columns:repeat(3,1fr)}
  .home-about .l-wrap{gap:34px}
}
@media (max-width:980px){
  .header-main .l-wrap{height:70px}
  .nav>li>a{padding:22px 12px;font-size:15px}
  .hd-tel{display:none}
  .home-about .l-wrap{flex-direction:column}
  .home-about .left,.home-about .right{width:100%}
  .page-container{flex-direction:column}
  .sidebar{width:100%;flex:auto;display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .side-box{margin-bottom:0}
  .product-detail{flex-direction:column}
  .product-detail .gallery{width:100%;flex:auto}
  .contact-grid{flex-direction:column}
  .contact-info{width:100%;flex:auto}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .header-main .l-wrap{height:auto;padding:12px 16px;flex-wrap:wrap;gap:8px}
  .logo img{height:40px}
  .nav{width:100%;margin-left:0;overflow-x:auto;gap:0;border-top:1px solid var(--line)}
  .nav>li>a{padding:12px 12px;font-size:14px;white-space:nowrap}
  .nav .sub{display:none}
  .pro-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .home-about,.home-product{padding:40px 0}
  .home-about h2,.home-product .head h2{font-size:26px}
  .sidebar{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .float-bar{bottom:16px;right:12px;flex-direction:row}
}