:root{
  --teal:#008e90;
  --teal-deep:#005f60;
  --teal-dark:#0b3d3e;
  --teal-soft:#e0f2f2;
  --ink:#153334;
  --paper:#f7fafa;
  --gold:#e8b04b;
  --radius:18px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);
  background:var(--paper);
  overflow-x:hidden;
}
::selection{background:var(--teal);color:#fff}
h1,h2,h3{line-height:1.25}
img{max-width:100%}

/* ============ 导航 ============ */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 5vw;
  background:rgba(247,250,250,.85);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(0,142,144,.1);
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo-img{
  width:44px;height:44px;object-fit:contain;
  filter:drop-shadow(0 4px 10px rgba(0,142,144,.35));
}
.logo b{font-size:19px;letter-spacing:2px}
.logo small{display:block;font-size:10px;color:var(--teal);letter-spacing:3px}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{
  text-decoration:none;color:var(--ink);font-size:15px;
  padding:9px 18px;border-radius:999px;transition:.25s;
  position:relative;
}
.nav-links a:hover{background:var(--teal-soft);color:var(--teal-deep)}
.nav-links a.active{background:var(--teal);color:#fff;box-shadow:0 4px 12px rgba(0,142,144,.35)}
.burger{display:none;background:none;border:none;font-size:24px;color:var(--teal);cursor:pointer}

/* ============ 首屏 ============ */
.hero{
  min-height:92vh;display:grid;grid-template-columns:1.1fr 1fr;
  align-items:center;gap:4vw;padding:120px 6vw 60px;position:relative;
}
.hero-bg{
  position:absolute;inset:0;z-index:-1;overflow:hidden;
  background:linear-gradient(160deg,#f7fafa 55%,var(--teal-soft));
}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}
.blob.b1{width:480px;height:480px;background:#7fd6d8;top:-120px;right:-80px}
.blob.b2{width:380px;height:380px;background:#bfe9ea;bottom:-100px;left:30%}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid rgba(0,142,144,.25);
  color:var(--teal);font-size:13px;padding:7px 16px;border-radius:999px;
  box-shadow:0 4px 14px rgba(0,142,144,.12);margin-bottom:22px;
}
.hero h1{
  font-size:clamp(34px,4.6vw,58px);font-weight:900;letter-spacing:1px;
  color:var(--teal-dark);
}
.hero h1 em{
  font-style:normal;color:var(--teal);position:relative;
}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;
  background:rgba(0,142,144,.18);z-index:-1;border-radius:4px;
}
.hero p{margin:20px 0 32px;color:#4a6a6b;font-size:17px;line-height:1.9;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;
  padding:14px 32px;border-radius:999px;font-size:16px;font-weight:600;
  transition:.25s;cursor:pointer;border:none;
}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 22px rgba(0,142,144,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(0,142,144,.5)}
.btn-ghost{background:#fff;color:var(--teal-deep);border:1.5px solid rgba(0,142,144,.4)}
.btn-ghost:hover{background:var(--teal-soft)}
.hero-stats{display:flex;gap:36px;margin-top:44px}
.hero-stats div b{font-size:28px;color:var(--teal);font-weight:900}
.hero-stats div span{display:block;font-size:13px;color:#6b8a8b;margin-top:2px}

.hero-visual{position:relative;display:grid;place-items:center}
.hero-card{
  background:#fff;border-radius:28px;padding:28px;
  box-shadow:0 30px 70px rgba(11,61,62,.16);
  transform:rotate(-3deg);width:min(420px,100%);
  transition:.4s;
}
.hero-card:hover{transform:rotate(0deg) scale(1.02)}
.hero-card .hc-tag{
  display:inline-block;background:var(--teal-soft);color:var(--teal-deep);
  font-size:12px;padding:4px 12px;border-radius:999px;margin-bottom:14px;
}
.hero-card .hc-img{width:100%;height:180px;object-fit:cover;border-radius:14px}
.chip{
  position:absolute;background:#fff;border-radius:16px;padding:12px 18px;
  box-shadow:0 12px 30px rgba(11,61,62,.14);font-size:13px;
  display:flex;align-items:center;gap:10px;animation:float 5s ease-in-out infinite;
}
.chip .dot{width:10px;height:10px;border-radius:50%;background:var(--teal)}
.chip.c1{top:6%;left:-4%}
.chip.c2{bottom:14%;right:-2%;animation-delay:1.4s}
.chip.c3{bottom:-4%;left:12%;animation-delay:2.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* ============ 通用区块 ============ */
section{padding:90px 6vw}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head .kicker{
  color:var(--teal);font-weight:700;font-size:13px;letter-spacing:4px;
  text-transform:uppercase;display:flex;align-items:center;gap:12px;
}
.sec-head .kicker::before{content:"";width:34px;height:2px;background:var(--teal)}
.sec-head h2{font-size:clamp(26px,3.2vw,40px);color:var(--teal-dark);margin-top:12px;font-weight:900}
.sec-head p{color:#5a7a7b;margin-top:14px;line-height:1.8}
.cat-note{
  display:inline-block;margin-top:16px;background:var(--teal-soft);
  color:var(--teal-deep);font-size:12px;padding:5px 14px;border-radius:999px;
  letter-spacing:1px;
}

/* ============ 产品卡 ============ */
.cat-section:nth-of-type(even){background:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:26px}
.p-card{
  background:var(--paper);border-radius:var(--radius);overflow:hidden;
  border:1px solid rgba(0,142,144,.08);
  transition:.35s;position:relative;
}
.cat-section:nth-of-type(even) .p-card{background:#fff}
.p-card:hover{transform:translateY(-8px);box-shadow:0 24px 50px rgba(11,61,62,.14);border-color:transparent}
.p-thumb{
  height:210px;overflow:hidden;position:relative;
  background:linear-gradient(150deg,var(--teal-soft),#fff);
}
.p-thumb img{width:100%;height:100%;object-fit:cover;transition:.45s}
.p-card:hover .p-thumb img{transform:scale(1.08)}
.p-tag{
  position:absolute;top:14px;left:14px;background:var(--teal-dark);color:#fff;
  font-size:11px;padding:4px 12px;border-radius:999px;letter-spacing:1px;z-index:2;
}
.p-body{padding:18px 20px 20px}
.p-body h3{
  font-size:15px;color:var(--teal-dark);line-height:1.55;height:46px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.p-foot{display:flex;align-items:center;justify-content:space-between;margin-top:12px}
.price{color:var(--teal);font-weight:900;font-size:21px}
.price small{font-size:12px;font-weight:400}
.p-acts{display:flex;gap:8px;align-items:center}
.view-btn{
  font-size:13px;color:var(--teal-deep);border:1.5px solid rgba(0,142,144,.4);
  padding:9px 16px;border-radius:999px;text-decoration:none;transition:.25s;white-space:nowrap;
}
.view-btn:hover{background:var(--teal);color:#fff;border-color:var(--teal)}

/* ============ 售后保障 ============ */
.service{background:linear-gradient(180deg,var(--paper),var(--teal-soft))}
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.svc-card{
  background:#fff;border-radius:var(--radius);padding:34px 28px;
  border:1px solid rgba(0,142,144,.1);transition:.3s;position:relative;overflow:hidden;
}
.svc-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--teal),#00c2c4);
  transform:scaleX(0);transform-origin:left;transition:.4s;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:0 20px 44px rgba(11,61,62,.12)}
.svc-card:hover::before{transform:scaleX(1)}
.svc-icon{
  width:56px;height:56px;border-radius:16px 16px 16px 4px;
  background:var(--teal-soft);display:grid;place-items:center;margin-bottom:20px;
}
.svc-card h3{font-size:18px;margin-bottom:10px;color:var(--teal-dark)}
.svc-card p{font-size:14px;color:#5a7a7b;line-height:1.8}
.promise{
  margin-top:44px;background:var(--teal-dark);color:#fff;
  border-radius:24px;padding:36px 40px;display:flex;gap:34px;
  flex-wrap:wrap;align-items:center;justify-content:space-between;
}
.promise h3{font-size:22px;margin-bottom:8px}
.promise p{color:#9fc9ca;font-size:14px;line-height:1.7}
.promise .hotline{
  font-size:30px;font-weight:900;letter-spacing:1px;color:#fff;text-decoration:none;
  display:flex;align-items:center;gap:12px;
}
.promise .hotline svg{flex-shrink:0}
.promise .hotline span{background:var(--gold);color:var(--teal-dark);font-size:12px;padding:5px 12px;border-radius:999px;font-weight:700}

/* ============ 页脚 ============ */
footer{
  background:var(--teal-dark);color:#cfe7e8;position:relative;overflow:hidden;
}
.foot-wave{display:block;width:100%;height:80px;background:var(--teal-dark)}
.foot-wave path{fill:#fff}
.foot-inner{padding:20px 6vw 0;position:relative;z-index:1}
.foot-giant{
  font-size:clamp(60px,11vw,150px);font-weight:900;letter-spacing:6px;
  color:transparent;-webkit-text-stroke:1.5px rgba(255,255,255,.14);
  line-height:1;user-select:none;white-space:nowrap;
}
.foot-grid{
  display:grid;grid-template-columns:1.3fr 1fr 1fr auto;gap:44px;
  padding:54px 0 44px;align-items:start;
}
.foot-grid h4{
  color:#fff;font-size:15px;letter-spacing:2px;margin-bottom:20px;
  display:flex;align-items:center;gap:10px;
}
.foot-grid h4::before{content:"";width:22px;height:2px;background:var(--gold)}
.foot-brand p{font-size:14px;line-height:2;color:#9fc9ca;max-width:340px}
.foot-brand .f-logo{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.f-logo .logo-img{width:38px;height:38px}
.f-logo b{color:#fff;font-size:18px;letter-spacing:2px}
.f-contact{list-style:none;display:flex;flex-direction:column;gap:14px;font-size:14px}
.f-contact li{display:flex;gap:12px;line-height:1.7;color:#9fc9ca;align-items:flex-start}
.f-contact li svg{flex-shrink:0;margin-top:3px}
.f-contact li b{color:#fff;font-weight:600}
.f-contact .tel{font-size:22px;font-weight:900;color:var(--gold);letter-spacing:1px}
.f-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.f-links a{color:#9fc9ca;text-decoration:none;font-size:14px;transition:.2s;display:inline-flex;align-items:center;gap:8px}
.f-links a::before{content:"→";color:var(--teal);opacity:0;transition:.2s}
.f-links a:hover{color:#fff}
.f-links a:hover::before{opacity:1}
.qr-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:20px;padding:20px;text-align:center;backdrop-filter:blur(6px);
  transition:.3s;
}
.qr-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.qr-card img{width:132px;height:132px;border-radius:12px;background:#fff;padding:10px;display:block}
.qr-card span{display:block;margin-top:12px;font-size:13px;color:#e6f6f6}
.qr-card small{display:block;margin-top:4px;font-size:11px;color:#7fb2b3;letter-spacing:1px}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 6vw;display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;font-size:13px;color:#7fb2b3;position:relative;z-index:1;
}
.foot-bottom a{color:#9fc9ca;text-decoration:none}
.foot-bottom a:hover{color:var(--gold)}
.foot-deco{
  position:absolute;right:-60px;bottom:-60px;width:340px;height:340px;
  border-radius:50%;background:radial-gradient(circle,rgba(0,178,181,.25),transparent 70%);
  pointer-events:none;
}

/* toast */
.toast{
  position:fixed;bottom:36px;left:50%;transform:translate(-50%,80px);
  background:var(--teal-dark);color:#fff;padding:14px 28px;border-radius:999px;
  font-size:14px;box-shadow:0 14px 34px rgba(11,61,62,.35);z-index:200;
  transition:.35s;display:flex;align-items:center;gap:10px;opacity:0;
}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast .dot{width:9px;height:9px;border-radius:50%;background:var(--gold)}

@media(max-width:960px){
  .hero{grid-template-columns:1fr;padding-top:110px}
  .hero-visual{margin-top:40px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{
    position:fixed;top:70px;right:4vw;flex-direction:column;background:#fff;
    padding:16px;border-radius:20px;box-shadow:0 20px 50px rgba(11,61,62,.2);
    display:none;align-items:stretch;text-align:center;
  }
  .nav-links.open{display:flex}
  .burger{display:block}
}
@media(max-width:600px){
  .foot-grid{grid-template-columns:1fr}
  .chip.c1{left:0}.chip.c2{right:0}
}

/* ============ 导航下拉菜单 ============ */
.has-drop{position:relative}
.has-drop>a::after{content:"";display:inline-block;margin-left:6px;width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.drop-menu{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(8px);
  background:#fff;border-radius:16px;padding:8px;min-width:164px;
  box-shadow:0 18px 44px rgba(11,61,62,.18);
  display:flex;flex-direction:column;opacity:0;visibility:hidden;transition:.22s;
  border:1px solid rgba(0,142,144,.08);
}
.has-drop:hover .drop-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.drop-menu a{border-radius:10px;padding:10px 16px;white-space:nowrap;font-size:14px}
.drop-menu a:hover{background:var(--teal-soft);color:var(--teal-deep)}
@media(max-width:960px){
  .drop-menu{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:none;padding:0 0 0 14px;display:none;min-width:0}
  .has-drop.open .drop-menu{display:flex}
}

/* ============ 板块居中 ============ */
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .kicker{justify-content:center}
.sec-head.center .kicker::after{content:"";width:34px;height:2px;background:var(--teal)}

/* ============ 分类页横幅 ============ */
.cat-banner{
  padding:150px 6vw 64px;position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(140deg,var(--teal) 0%,var(--teal-deep) 60%,var(--teal-dark) 100%);
}
.cat-banner::before{
  content:"";position:absolute;right:-80px;top:-80px;width:360px;height:360px;
  border-radius:50%;background:rgba(255,255,255,.07);
}
.cat-banner::after{
  content:"";position:absolute;right:120px;bottom:-120px;width:260px;height:260px;
  border-radius:50%;background:rgba(232,176,75,.14);
}
.cat-banner .cb-kicker{
  font-size:13px;letter-spacing:4px;color:var(--gold);font-weight:700;
  display:flex;align-items:center;gap:12px;margin-bottom:14px;position:relative;z-index:1;
}
.cat-banner .cb-kicker::before{content:"";width:34px;height:2px;background:var(--gold)}
.cat-banner h1{font-size:clamp(32px,4.5vw,52px);font-weight:900;position:relative;z-index:1}
.cat-banner p{margin-top:14px;color:#bfe3e4;font-size:15px;max-width:560px;line-height:1.8;position:relative;z-index:1}
.crumb{margin-top:26px;font-size:13px;position:relative;z-index:1}
.crumb a{color:#9fc9ca;text-decoration:none}
.crumb a:hover{color:var(--gold)}
.crumb i{font-style:normal;margin:0 8px;color:#5a9394}
.crumb b{color:#fff;font-weight:600}
.cat-page-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:26px;max-width:1200px;margin:0 auto}
@media(max-width:640px){.cat-page-grid{grid-template-columns:repeat(2,1fr);gap:14px}}
.back-bar{max-width:1200px;margin:0 auto 30px;display:flex;justify-content:center}

/* ============ 六大板块：最大宽度1340px居中 ============ */
.cat-section{
  padding-left:max(6vw, calc((100vw - 1340px)/2));
  padding-right:max(6vw, calc((100vw - 1340px)/2));
}
.cat-page-grid{max-width:1340px}

/* ============ 大图轮播 ============ */
.banner{position:relative;margin-top:66px;height:min(74vh,640px);min-height:440px;overflow:hidden}
.slide{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transition:opacity .9s ease;display:flex;align-items:center;
}
.slide.on{opacity:1}
.slide::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,50,51,.75) 0%,rgba(8,50,51,.38) 48%,transparent 78%)}
.slide-cap{position:relative;z-index:1;color:#fff;padding:0 max(6vw,calc((100vw - 1340px)/2));max-width:660px}
.sc-kicker{color:var(--gold);font-size:13px;letter-spacing:4px;font-weight:700;display:flex;gap:12px;align-items:center}
.sc-kicker::before{content:"";width:34px;height:2px;background:var(--gold)}
.slide-cap h2{font-size:clamp(28px,4vw,50px);font-weight:900;margin:16px 0}
.slide-cap p{color:#cfe7e8;font-size:16px;line-height:1.9;margin-bottom:30px}
.slide-arrow{
  position:absolute;top:50%;transform:translateY(-50%);width:48px;height:48px;
  border-radius:50%;border:none;background:rgba(255,255,255,.15);backdrop-filter:blur(6px);
  color:#fff;cursor:pointer;z-index:3;display:grid;place-items:center;transition:.25s;
}
.slide-arrow:hover{background:var(--teal)}
.prev{left:26px}.next{right:26px}
.slide-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:3}
.dot-b{width:10px;height:10px;border-radius:999px;border:none;background:rgba(255,255,255,.4);cursor:pointer;transition:.3s;padding:0}
.dot-b.on{width:30px;background:var(--gold)}
@media(max-width:640px){.slide-arrow{display:none}}

/* ============ 查看详情按钮 ============ */
a.p-thumb{display:block}
a.p-title{text-decoration:none;color:inherit}

/* ============ 产品详情页 ============ */
.detail-wrap{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:50px}
@media(max-width:860px){.detail-wrap{grid-template-columns:1fr}}
.d-gallery img{width:100%;border-radius:20px;border:1px solid rgba(0,142,144,.12);display:block}
.d-cat{color:var(--teal);font-size:13px;letter-spacing:2px;font-weight:700}
.d-title{font-size:clamp(19px,2.2vw,26px);color:var(--teal-dark);margin:12px 0 20px;font-weight:900;line-height:1.55}
.d-price{
  background:linear-gradient(135deg,var(--teal-soft),#fff);
  border:1px solid rgba(0,142,144,.15);border-radius:16px;
  padding:20px 26px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
}
.d-price b{font-size:36px;color:var(--teal);font-weight:900}
.d-price s{color:#9db8b9;font-size:14px}
.d-price em{font-style:normal;font-size:12px;background:var(--gold);color:var(--teal-dark);padding:4px 12px;border-radius:999px;font-weight:700}
.d-tags{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}
.d-tags span{background:var(--teal-soft);color:var(--teal-deep);font-size:12px;padding:6px 14px;border-radius:999px}
.d-acts{display:flex;gap:14px;margin:26px 0;flex-wrap:wrap;align-items:center}
.buy-now{
  background:var(--teal-dark);color:#fff;border:none;padding:15px 40px;border-radius:999px;
  font-size:16px;font-weight:700;cursor:pointer;transition:.25s;
}
.buy-now:hover{background:var(--teal)}
.d-meta{font-size:13px;color:#6b8a8b;line-height:2.1;border-top:1px dashed rgba(0,142,144,.25);padding-top:16px}
.d-meta b{color:var(--teal-dark)}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:16px}
.spec-table td{border:1px solid rgba(0,142,144,.15);padding:12px 16px}
.spec-table td:first-child{background:var(--paper);color:#5a7a7b;width:130px}
.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:22px}
.rel-card{
  background:var(--paper);border:1px solid rgba(0,142,144,.1);border-radius:16px;
  overflow:hidden;text-decoration:none;transition:.3s;display:block;
}
.rel-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(11,61,62,.13)}
.rel-card img{width:100%;height:150px;object-fit:cover;display:block}
.rel-card .rc-body{padding:14px 16px}
.rel-card h4{font-size:13px;color:var(--teal-dark);line-height:1.55;height:40px;overflow:hidden}
.rel-card .price{font-size:16px;margin-top:8px}
.d-banner{
  padding:130px 6vw 50px;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(140deg,var(--teal),var(--teal-deep) 60%,var(--teal-dark));
}
.d-banner .crumb2{font-size:13px;position:relative;z-index:1}
.crumb2 a{color:#9fc9ca;text-decoration:none}
.crumb2 a:hover{color:var(--gold)}
.crumb2 i{font-style:normal;margin:0 8px;color:#5a9394}
.crumb2 b{color:#fff;font-weight:600}