/* HOTDROP storefront · clean white, upright, bilingual.
 * Rules baked in: no infinite animations, no rotation transforms, 375px must not overflow.
 * Design floor: tj_kit/design_v1/BASELINE_api-bill-shield.html */

:root{
  /* Paper, porcelain, ink. The only accent is ink itself — colour appears solely as
     status semantics (stock green), never as decoration. No gradients anywhere. */
  --bg:#fdfdfc; --bg-soft:#f4f3f0; --bg-card:#ffffff; --bg-sink:#eeece7;
  --ink:#14140f; --ink-soft:#514e47; --ink-mute:#8b877e;
  --line:#e6e4df; --line-strong:#d3d0c8;
  --hype:#14140f;                       /* accent === ink, kept as a token for the kit */
  --hype-soft:#f0efeb;
  --good:#1f7a4d; --good-soft:#eaf3ee;
  --bad:#a3261e;
  --r:10px; --r-sm:7px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 1px 2px rgba(20,20,15,.04),0 10px 30px rgba(20,20,15,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  /* The system stack the large retailers actually ship: SF on Apple, Segoe on Windows,
     Roboto on Android, with the matching CJK faces. No webfont download, no Inter —
     a typeface every OS already renders at its best reads as native, not generated. */
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,
       "Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  font-feature-settings:"kern" 1;text-rendering:optimizeLegibility;
}
/* Display type: tighter tracking and optical sizing, the way Apple and Stripe set headlines. */
h1,h2,.brand,.price,.pd-price,.cart-total .n{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,
              "Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
/* Prices and any figure that must line up read as tabular, never as prose. */
.price,.compare,.pd-price,.pd-compare,.cart-total .n,.li-unit,.how-n{
  font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1,"kern" 1;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;cursor:pointer}
.wrap{max-width:1160px;margin:0 auto;padding:0 clamp(16px,4vw,32px)}

/* ---------- language ---------- */
[data-zh]::after{content:attr(data-en)}
html[lang^=zh] [data-zh]::after{content:attr(data-zh)}
/* usage: <span class="t" data-en="Cart" data-zh="购物车"></span> — text lives in attributes,
   both languages ship in the HTML, crawlers see the EN default via ::after on en. */

/* ---------- header ---------- */
.usp{background:var(--ink);color:#fff;font-size:12.5px;letter-spacing:.04em;text-align:center;padding:7px 12px}
.usp b{color:#fff;font-weight:600}
.hd-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hd-head .wrap{display:flex;align-items:center;gap:14px 22px;min-height:62px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
@media (max-width:720px){
  .hd-nav{order:3;flex-basis:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:14px;padding-bottom:4px}
  .hd-nav a{white-space:nowrap}
  .hd-tools{margin-left:auto}
}
.brand{font-weight:700;font-size:18.5px;letter-spacing:-.015em;text-decoration:none;white-space:nowrap}
.brand em{font-style:normal;color:var(--hype)}
.hd-nav{display:flex;gap:18px;font-size:14px;margin-right:auto}
.hd-nav a{text-decoration:none;color:var(--ink-soft);padding:6px 2px;border-bottom:2px solid transparent}
.hd-nav a:hover,.hd-nav a[aria-current]{color:var(--ink);border-bottom-color:var(--hype)}
.hd-tools{display:flex;align-items:center;gap:12px}
.lang-btn{border:1px solid var(--line-strong);background:#fff;border-radius:var(--r-sm);padding:7px 13px;font-size:12.5px;color:var(--ink-soft);transition:border-color .2s var(--ease),color .2s var(--ease)}
.lang-btn:hover{border-color:var(--ink);color:var(--ink)}
.cart-link{position:relative;display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-size:13.5px;font-weight:600;border:1px solid var(--ink);border-radius:var(--r-sm);padding:8px 15px;background:var(--ink);color:#fff;transition:opacity .2s var(--ease)}
.cart-link:hover{opacity:.86}
.cart-n{background:#fff;color:var(--ink);font-size:11px;font-weight:700;min-width:18px;height:18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;padding:0 5px}

/* ---------- hero ---------- */
.hero{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.hero .wrap{padding-top:clamp(34px,6vw,64px);padding-bottom:clamp(34px,6vw,64px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(24px,5vw,58px);align-items:center}
@media (max-width:880px){.hero .wrap{grid-template-columns:1fr;gap:26px}}
.eyebrow{display:inline-block;font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:16px;font-weight:600}
h1.hero-h{font-size:clamp(2rem,5vw,3.2rem);line-height:1.08;letter-spacing:-.028em;margin:0 0 18px;font-weight:700}
.hero-p{color:var(--ink-soft);max-width:52ch;margin:0 0 26px;font-size:1rem}
.hero-cta{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;font-size:14.5px;border-radius:var(--r-sm);padding:14px 30px;transition:opacity .2s var(--ease)}
.hero-cta:hover{opacity:.86}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;font-size:12.5px;color:var(--ink-mute)}
.trust-row span{display:inline-flex;align-items:center;gap:6px}
.trust-row svg{flex:0 0 auto}

/* ---------- product grid ---------- */
.sec{padding:clamp(34px,6vw,60px) 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:22px}
.sec-head h2{font-size:clamp(1.25rem,3vw,1.7rem);letter-spacing:-.018em;margin:0;font-weight:600}
.sec-head .sub{color:var(--ink-mute);font-size:13.5px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:clamp(14px,2.5vw,26px)}
.card{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--bg-card);text-decoration:none;display:flex;flex-direction:column;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.card-img{aspect-ratio:1/1;background:var(--bg-soft);position:relative;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover}
.badge{position:absolute;top:10px;left:10px;font-size:10.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;border-radius:3px;padding:4px 9px;background:rgba(255,255,255,.92);color:var(--ink-soft);border:1px solid var(--line)}
.badge.hot{background:rgba(255,255,255,.92);color:var(--ink-soft)}
.card-body{padding:14px 15px 16px;display:flex;flex-direction:column;gap:7px;flex:1}
.card-title{font-size:14.5px;font-weight:600;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.7em}
.price-row{display:flex;align-items:baseline;gap:9px;margin-top:auto}
.price{font-size:16.5px;font-weight:600;letter-spacing:-.01em}
.compare{color:var(--ink-mute);text-decoration:line-through;font-size:13px}
.ship-note{font-size:12px;color:var(--ink-mute)}

/* ---------- product page ---------- */
.pd{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(22px,4vw,54px);padding:clamp(26px,5vw,54px) 0}
@media (max-width:840px){.pd{grid-template-columns:1fr}}
.pd-gallery{display:flex;flex-direction:column;gap:12px}
.pd-main{aspect-ratio:1/1;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--bg-soft)}
.pd-main img{width:100%;height:100%;object-fit:cover}
.pd-thumbs{display:flex;gap:10px;flex-wrap:wrap}
.pd-thumbs button{width:64px;height:64px;border-radius:var(--r-sm);border:1px solid var(--line);overflow:hidden;padding:0;background:var(--bg-soft)}
.pd-thumbs button[aria-current]{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink)}
.pd-thumbs img{width:100%;height:100%;object-fit:cover}
.pd-info h1{font-size:clamp(1.45rem,3.4vw,2.05rem);line-height:1.15;letter-spacing:-.024em;margin:4px 0 12px;font-weight:600}
.pd-price-row{display:flex;align-items:baseline;gap:12px;margin:6px 0 4px}
.pd-price{font-size:27px;font-weight:600;letter-spacing:-.022em}
.pd-compare{color:var(--ink-mute);text-decoration:line-through;font-size:16px}
.pd-save{font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--ink-soft);border:1px solid var(--line-strong);border-radius:3px;padding:4px 10px}
.pd-desc{color:var(--ink-soft);font-size:15px;margin:14px 0 20px}
.qty{display:inline-flex;align-items:center;border:1px solid var(--line-strong);border-radius:var(--r-sm);overflow:hidden}
.qty button{width:38px;height:40px;border:0;background:#fff;font-size:17px;color:var(--ink-soft)}
.qty button:hover{background:var(--bg-soft)}
.qty output{width:40px;text-align:center;font-weight:700;font-size:15px}
.buy-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:8px 0 18px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-sm);padding:14px 26px;font-weight:600;font-size:14.5px;border:1px solid var(--ink);text-decoration:none;transition:opacity .2s var(--ease)}
.btn:hover{opacity:.86}
.btn-primary{background:var(--ink);color:#fff}
.btn-accent{background:var(--ink);border-color:var(--ink);color:#fff}
.btn-ghost{background:#fff;color:var(--ink)}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.pd-meta{border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;display:grid;gap:10px;font-size:13.5px;color:var(--ink-soft);background:var(--bg-soft)}
.pd-meta div{display:flex;gap:9px;align-items:flex-start}
.pd-meta svg{flex:0 0 auto;margin-top:2px}

/* ---------- cart / order ---------- */
.narrow{max-width:760px;margin:0 auto;padding:clamp(26px,5vw,54px) clamp(16px,4vw,32px)}
.line-item{display:grid;grid-template-columns:76px 1fr auto;gap:14px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}
.line-item img{width:76px;height:76px;object-fit:cover;border-radius:var(--r-sm);border:1px solid var(--line)}
.li-title{font-size:14.5px;font-weight:600}
.li-unit{font-size:12.5px;color:var(--ink-mute)}
.li-right{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.li-remove{border:0;background:none;color:var(--ink-mute);font-size:12.5px;text-decoration:underline;padding:0}
.cart-total{display:flex;justify-content:space-between;align-items:baseline;padding:20px 0;font-size:15px}
.cart-total .n{font-size:22px;font-weight:600;letter-spacing:-.02em}
.note-box{border:1px solid var(--line);background:var(--bg-soft);border-radius:var(--r);padding:16px 18px;font-size:13.5px;color:var(--ink-soft);margin:18px 0}
.empty{color:var(--ink-mute);text-align:center;padding:46px 0;font-size:15px}
.form{display:grid;gap:12px;margin:18px 0}
.form input{font:inherit;border:1px solid var(--line-strong);border-radius:var(--r-sm);padding:12px 14px;width:100%}
.form input:focus{outline:2px solid var(--ink);outline-offset:1px;border-color:var(--ink)}
.timeline{list-style:none;margin:22px 0;padding:0;display:grid;gap:0}
.timeline li{display:flex;gap:14px;padding:0 0 22px;position:relative}
.timeline li::before{content:"";position:absolute;left:9px;top:22px;bottom:0;width:2px;background:var(--line)}
.timeline li:last-child::before{display:none}
.dot{width:20px;height:20px;border-radius:50%;border:2px solid var(--line-strong);background:#fff;flex:0 0 auto;margin-top:1px}
.timeline li.done .dot{background:var(--good);border-color:var(--good)}
.timeline li.now .dot{border-color:var(--ink);background:#fff}
.tl-label{font-weight:600;font-size:14.5px}
.tl-sub{font-size:12.5px;color:var(--ink-mute)}
.alert{border-radius:var(--r-sm);padding:12px 15px;font-size:14px;margin:14px 0}
.alert.ok{background:var(--good-soft);color:var(--good)}
.alert.err{background:#fdecea;color:var(--bad)}

/* ---------- info pages ---------- */
.prose{max-width:720px;margin:0 auto;padding:clamp(26px,5vw,54px) clamp(16px,4vw,32px)}
.prose h1{font-size:clamp(1.5rem,4vw,2.1rem);letter-spacing:-.01em}
.prose h2{font-size:1.15rem;margin-top:2em}
.prose p,.prose li{color:var(--ink-soft);font-size:15px}

/* ---------- hero shelf: the goods themselves are the hero proof ---------- */
.hero-shelf{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.hero-shelf .card{background:#fff}
@media (max-width:520px){.hero-shelf{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}

/* ---------- reveal: goods arrive on the shelf, they do not fly ---------- */
@media (prefers-reduced-motion:reduce){
  .card:hover,.hero-cta:hover,.btn:hover,.cart-link:hover{transform:none}
  *{scroll-behavior:auto}
}

/* ---------- how it works: a numbered shelf list, not a card triptych ---------- */
.how{list-style:none;counter-reset:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid var(--line)}
.how li{display:grid;grid-template-columns:64px 1fr;gap:8px 20px;align-items:start;padding:22px 2px;border-bottom:1px solid var(--line)}
.how-n{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--ink-mute);padding-top:3px}
.how strong{font-size:15.5px;font-weight:600;display:block;margin-bottom:6px}
.how p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.7;max-width:70ch}
@media (max-width:560px){.how li{grid-template-columns:40px 1fr;gap:6px 12px}}

/* ---------- per-product delivery table ---------- */
.ship-zones{border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;margin:0 0 16px;background:#fff}
.sz-head{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:10px}
.sz-table{width:100%;border-collapse:collapse;font-size:13.5px}
.sz-table td{padding:8px 10px 8px 0;border-bottom:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
.sz-table tr:last-child td{border-bottom:0}
.sz-table td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.sz-duty{color:var(--ink-mute);font-size:12.5px}
.sz-note{margin:10px 0 0;font-size:12.5px;color:var(--ink-mute);line-height:1.6}
@media (max-width:520px){.sz-table,.sz-table tbody,.sz-table tr,.sz-table td{display:block;width:100%}
  .sz-table tr{padding:9px 0;border-bottom:1px solid var(--line)}
  .sz-table td{border:0;padding:1px 0}}

/* ---------- price comparison: the proposition, stated checkably ---------- */
.rival{font-size:12px;color:var(--ink-mute)}
.rival-box{border:1px solid var(--line);border-left:3px solid var(--good);border-radius:var(--r-sm);
           padding:12px 14px;margin:14px 0 4px;background:var(--good-soft)}
.rival-box strong{display:block;font-size:15px;color:var(--good);margin-bottom:4px;letter-spacing:-.01em}
.rival-src{font-size:12.5px;color:var(--ink-soft);line-height:1.6}
.rival-src a{color:var(--ink);text-underline-offset:2px}
.rival-date{color:var(--ink-mute)}

/* ---------- reviews ---------- */
.rv-top{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:6px}
@media (max-width:560px){.rv-top{grid-template-columns:1fr;gap:14px}}
.rv-avg{display:flex;flex-direction:column;gap:4px}
.rv-avg strong{font-size:34px;font-weight:600;letter-spacing:-.03em;line-height:1}
.rv-count{font-size:12.5px;color:var(--ink-mute)}
.rv-stars{color:var(--ink);letter-spacing:2px;font-size:14px}
.rv-dim{color:var(--line-strong)}
.rv-hist{display:grid;gap:5px}
.rv-bar{display:grid;grid-template-columns:28px 1fr 28px;gap:9px;align-items:center;font-size:12px;color:var(--ink-mute)}
.rv-bar i{display:block;height:6px;background:var(--bg-sink);border-radius:3px;overflow:hidden}
.rv-bar b{display:block;height:100%;background:var(--ink-soft)}
.rv-item{padding:18px 0;border-bottom:1px solid var(--line)}
.rv-item header{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:7px}
.rv-who{font-size:13.5px;font-weight:600}
.rv-badge{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--good);background:var(--good-soft);border-radius:3px;padding:3px 7px;font-weight:600}
.rv-item time{font-size:12px;color:var(--ink-mute);margin-left:auto}
.rv-item h3{font-size:14.5px;margin:0 0 5px;font-weight:600}
.rv-item p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.7}
.rv-disc{margin-top:7px!important;font-size:12px!important;color:var(--ink-mute)!important;font-style:italic}

/* ---------- rating input ---------- */
.rate-row{display:flex;align-items:center;gap:4px}
.rate-row button{border:0;background:none;font-size:30px;line-height:1;color:var(--line-strong);padding:2px 1px;transition:color .15s var(--ease)}
.rate-row button.on{color:var(--ink)}
.rate-row button:hover{color:var(--ink-soft)}
.rate-hint{margin-left:10px;font-size:13px;color:var(--ink-mute)}

/* ---------- cost breakdown: the answer to "why so cheap" ---------- */
.cost-box{border:1px solid var(--line);border-radius:var(--r-sm);margin:14px 0 18px;background:var(--bg-soft)}
.cost-box>summary{cursor:pointer;list-style:none;padding:12px 15px;font-size:13.5px;font-weight:600;color:var(--ink)}
.cost-box>summary::-webkit-details-marker{display:none}
.cost-box>summary::after{content:" +";color:var(--ink-mute);font-weight:400}
.cost-box[open]>summary::after{content:" −"}
.cost-table{width:100%;border-collapse:collapse;font-size:13.5px;padding:0 15px}
.cost-table td{padding:7px 15px;color:var(--ink-soft);border-top:1px solid var(--line)}
.cost-table td:last-child{text-align:right;font-variant-numeric:tabular-nums}
.cost-total td{font-weight:700;color:var(--ink);border-top:1px solid var(--line-strong)}
.cost-note{margin:0;padding:10px 15px 14px;font-size:12.5px;color:var(--ink-mute);line-height:1.65}

/* ---------- product options ---------- */
.opt-row{display:grid;gap:14px;margin:4px 0 18px}
.opt-group{display:grid;gap:7px}
.opt-label{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-mute)}
.opt-values{display:flex;flex-wrap:wrap;gap:8px}
.opt-values button{min-width:46px;padding:9px 13px;border:1px solid var(--line-strong);border-radius:var(--r-sm);
                   background:#fff;font-size:13.5px;font-weight:500;transition:border-color .18s var(--ease)}
.opt-values button:hover:not([disabled]){border-color:var(--ink)}
.opt-values button[aria-current]{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink);font-weight:600}
.opt-values button[disabled]{color:var(--ink-mute);background:var(--bg-soft);cursor:not-allowed;
                             text-decoration:line-through;text-decoration-thickness:1px}