:root{
  --bg:#f1f1ef; --white:#fff; --ink:#222221; --ink-2:#3d3d3b;
  --muted:#6f6f6b; --faint:#9a9a95;
  --line:rgba(34,34,33,.13); --line-2:rgba(34,34,33,.28);
  --wa:#1e9e50; --wa-dark:#187f40;
  --max:1180px;
  --font:"Helvetica Neue",Helvetica,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --r:10px; --r-pill:999px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 28px}
.eyebrow{display:block;font-size:11.5px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--faint)}
h1,h2,h3,h4{line-height:1.12;letter-spacing:-.02em;font-weight:800;margin:0}
body.zh [data-en]{display:none}
body:not(.zh) [data-zh]{display:none}

/* nav */
.nav{position:sticky;top:0;z-index:70;background:rgba(241,241,239,.92);backdrop-filter:saturate(150%) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:66px}
.ng{display:flex;align-items:center;gap:10px;text-decoration:none}
.ng-mark{font-weight:800;font-size:20px;letter-spacing:-.02em}
.ng-mark i{color:var(--faint);font-style:normal}
.ng-word{display:flex;flex-direction:column;font-size:9.5px;font-weight:800;letter-spacing:.18em;line-height:1.15}
.ng-word span{color:var(--muted)}
.nav-links{display:flex;gap:24px;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.nav-links a{text-decoration:none}
.nav-links a:hover{color:var(--ink)}
@media(max-width:860px){.nav-links{display:none}}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-search{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--line-2);border-radius:var(--r-pill);text-decoration:none;transition:background .16s,color .16s}
.nav-search:hover{background:var(--ink);color:var(--bg)}
.nav-search svg{width:16px;height:16px}
.lang{display:flex;border-radius:var(--r-pill);overflow:hidden;border:1px solid var(--line-2)}
.lang button{border:0;background:transparent;font:inherit;font-size:12.5px;font-weight:700;padding:7px 13px;cursor:pointer;color:var(--muted)}
.lang button.on{background:var(--ink);color:var(--bg)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 24px;border-radius:var(--r);font-weight:700;font-size:14.5px;border:1.5px solid var(--ink);cursor:pointer;font-family:inherit;text-decoration:none;transition:transform .18s cubic-bezier(.2,.7,.3,1),box-shadow .18s,background .18s,color .18s}
.btn-solid{background:var(--ink);color:var(--bg)}
.btn-solid:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(34,34,33,.22)}
.btn-line{background:transparent;color:var(--ink)}
.btn-line:hover{background:var(--ink);color:var(--bg);transform:translateY(-2px)}
.btn-wa{background:var(--wa);border-color:var(--wa);color:#fff}
.btn-wa:hover{background:var(--wa-dark);border-color:var(--wa-dark);transform:translateY(-2px);box-shadow:0 8px 22px rgba(30,158,80,.32)}
.btn-block{display:flex;width:100%}

/* breadcrumb */
.crumbs{padding:22px 0 0;font-size:13px;color:var(--muted)}
.crumbs a{text-decoration:none;color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.crumbs b{color:var(--ink);font-weight:600}

/* category hero */
.chero{padding:56px 0 30px}
.chero h1{font-size:clamp(30px,4.6vw,52px);margin-top:14px}
.chero .lead{color:var(--muted);font-size:17px;margin-top:16px;max-width:66ch}

/* grids & cards */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1000px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:430px){.grid{grid-template-columns:1fr}}
.pcard{background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s,border-color .2s}
.pcard:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(34,34,33,.10);border-color:var(--line-2)}
.ptile{position:relative;aspect-ratio:4/3;display:grid;place-items:center;padding:16px;overflow:hidden;background:radial-gradient(120% 90% at 15% 10%, rgba(34,34,33,.055) 0%, rgba(34,34,33,0) 60%),repeating-linear-gradient(135deg, rgba(34,34,33,.045) 0 2px, rgba(34,34,33,0) 2px 9px),var(--bg);border-bottom:1px solid var(--line)}
.ptile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ptile span{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);text-align:center;line-height:1.45}
.pbody{padding:15px 16px 16px;display:flex;flex-direction:column;gap:11px;flex:1}
.pbody h3{font-size:15.5px;line-height:1.35;font-weight:800}
.pbody h3 a{text-decoration:none}
.pbody h3 a:hover{text-decoration:underline}
.tile-link{display:block;text-decoration:none}
.pask{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;letter-spacing:.02em;text-decoration:none;color:var(--ink);border:1.5px solid var(--ink);border-radius:var(--r-pill);padding:8px 14px;align-self:flex-start;transition:background .16s,color .16s,transform .16s}
.pask:hover{background:var(--ink);color:var(--bg);transform:translateY(-1px)}

/* product page */
.pd{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:44px;padding:34px 0 10px;align-items:start}
@media(max-width:860px){.pd{grid-template-columns:1fr;gap:26px}}
.pd-img{position:sticky;top:90px;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:var(--white)}
@media(max-width:860px){.pd-img{position:static}}
.pd-img img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.pd-img .ph{aspect-ratio:4/3;display:grid;place-items:center;background:radial-gradient(120% 90% at 15% 10%, rgba(34,34,33,.055) 0%, rgba(34,34,33,0) 60%),repeating-linear-gradient(135deg, rgba(34,34,33,.045) 0 2px, rgba(34,34,33,0) 2px 9px),var(--bg)}
.pd-img .ph span{font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);text-align:center;padding:0 20px;line-height:1.6}
.pd-info h1{font-size:clamp(26px,3.6vw,40px);margin-top:12px}
.pd-price{margin-top:14px;font-size:17px;font-weight:800}
.pd-price small{display:block;font-weight:400;color:var(--muted);font-size:13.5px;margin-top:2px}
.notice{margin-top:18px;background:var(--white);border:1px solid var(--line);border-left:3px solid var(--ink);border-radius:var(--r);padding:14px 16px;font-size:14px;color:var(--ink-2)}
.pd-cta{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.trust{margin:22px 0 0;padding:0;list-style:none;display:grid;gap:9px;font-size:13.5px;color:var(--muted)}
.trust li{padding-left:22px;position:relative}
.trust li::before{content:"✓";position:absolute;left:0;font-weight:800;color:var(--ink)}
.pd-desc{margin-top:26px;font-size:15.5px;color:var(--ink-2)}
.spec{margin-top:26px}
.spec h2{font-size:17px;letter-spacing:.02em}
.spec ul{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:8px}
.spec li{font-size:14px;color:var(--ink-2);padding-left:16px;position:relative}
.spec li::before{content:"—";position:absolute;left:0;color:var(--faint)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{font-size:12.5px;padding:6px 12px;border:1px solid var(--line-2);border-radius:var(--r-pill);color:var(--ink-2);background:var(--white)}

/* sections */
.sect{padding:44px 0 8px}
.sect-head h2{font-size:clamp(21px,2.6vw,28px)}
.sect-head p{margin:8px 0 0;color:var(--muted);font-size:14.5px}
.choose{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
@media(max-width:860px){.choose{grid-template-columns:1fr}}
.choice{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:22px 20px}
.choice .q{font-size:15.5px;font-weight:800;line-height:1.4}
.choice p{margin:10px 0 0;font-size:14px;color:var(--muted)}
.choice .tag{display:inline-block;margin-top:14px;font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);border:1px solid var(--line-2);border-radius:var(--r-pill);padding:5px 12px}

/* accordion */
.acc{border-top:1px solid var(--line);margin-top:22px}
.acc-item{border-bottom:1px solid var(--line)}
.acc-head{width:100%;background:transparent;border:0;font-family:inherit;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 2px;cursor:pointer;text-align:left}
.acc-head h3{font-size:15.5px;font-weight:800}
.acc-head .plus{font-size:21px;font-weight:300;color:var(--muted);transition:transform .3s;flex:none}
.acc-item.open .plus{transform:rotate(45deg)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.3,.8,.3,1)}
.acc-inner{padding:0 2px 20px;font-size:14.5px;color:var(--muted);max-width:75ch}

/* CTA band */
.cta{margin:52px 0 0;background:var(--ink);color:var(--bg);border-radius:var(--r);padding:44px 34px;text-align:center}
.cta h2{font-size:clamp(22px,3vw,32px)}
.cta p{margin:14px auto 22px;color:rgba(241,241,239,.72);font-size:15.5px;max-width:56ch}
.cta .btn{border-color:var(--bg);background:var(--bg);color:var(--ink)}

/* footer */
.footer{margin-top:64px;border-top:1px solid var(--line);padding:46px 0 30px;background:var(--white)}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
@media(max-width:960px){.f-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.f-grid{grid-template-columns:1fr}}
.f-col h4{font-size:11.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);margin-bottom:14px}
.f-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.f-col a{font-size:13.5px;color:var(--muted);text-decoration:none}
.f-col a:hover{color:var(--ink)}
.f-brand small{display:block;margin-top:12px;color:var(--muted);font-size:12.5px;line-height:1.75}
.f-col .btn-wa,.f-col .btn-wa:hover{color:#fff}
.f-wa{margin-top:16px}
.f-wa .btn-wa{justify-content:center;text-align:center}
.f-bottom{margin-top:36px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:var(--faint)}
.f-wa{margin-top:16px}

/* floating whatsapp */
.wa{position:fixed;right:22px;bottom:22px;z-index:80;display:flex;align-items:center;gap:9px;background:var(--wa);color:#fff;font-weight:700;padding:14px 20px;border-radius:var(--r-pill);font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.18);text-decoration:none;transition:transform .18s}
.wa:hover{transform:translateY(-2px)}

/* reveal */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s cubic-bezier(.2,.7,.3,1),transform .6s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.rv{opacity:1;transform:none}html{scroll-behavior:auto}}

/* search page */
.searchbox{margin-top:26px;position:relative;max-width:560px}
.searchbox input{width:100%;font:inherit;font-size:16px;padding:15px 18px 15px 48px;border:1.5px solid var(--line-2);border-radius:var(--r);background:var(--white);color:var(--ink);outline:none}
.searchbox input:focus{border-color:var(--ink)}
.searchbox svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--faint)}
.s-meta{margin:18px 0 24px;font-size:13.5px;color:var(--muted)}

/* article / policy pages */
.article{max-width:760px;padding:14px 0 20px}
.article h1{font-size:clamp(28px,4vw,44px);margin-top:12px}
.article .meta{margin-top:14px;color:var(--faint);font-size:13px}
.article h2{font-size:clamp(19px,2.4vw,24px);margin-top:38px}
.article h3{font-size:16.5px;margin-top:26px}
.article p,.article li{font-size:15.5px;color:var(--ink-2)}
.article p{margin:14px 0 0}
.article ul,.article ol{margin:14px 0 0;padding-left:22px;display:grid;gap:8px}
.article table{border-collapse:collapse;width:100%;margin-top:16px;font-size:14px}
.article th,.article td{border:1px solid var(--line-2);padding:9px 12px;text-align:left;vertical-align:top}
.article th{background:var(--white);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase}
.article .tablewrap{overflow-x:auto}
.bloglist{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
@media(max-width:860px){.bloglist{grid-template-columns:1fr}}
.bcard{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:24px 22px;display:flex;flex-direction:column;gap:10px;text-decoration:none;transition:transform .2s,box-shadow .2s}
.bcard:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(34,34,33,.10)}
.bcard h3{font-size:17px}
.bcard p{margin:0;font-size:13.5px;color:var(--muted)}
.bcard .date{font-size:12px;color:var(--faint);letter-spacing:.08em;text-transform:uppercase;font-weight:800}
.related{margin-top:10px}
@media(max-width:640px){.chero{padding:40px 0 22px}.nav-inner{height:60px}}