/* 霧森製茶所 MIST FOREST — 新東方現代 modern oriental 高山茶 */
:root{
  --paper:#F5F0E4; --paper-2:#ECE4D3; --paper-3:#E2D8C2;
  --ink:#221F18; --ink-soft:#4C463A; --ink-mute:#766E5C;
  --tea:#2C3E32; --tea-2:#3C5544; --tea-3:#52735C;
  --gold:#B58A41; --gold-2:#C7A053; --gold-soft:#E7D4A8;
  --clay:#9C5B3B; --rouge:#9E3B36; --mist:#DDE3D7;
  --line:rgba(34,31,24,.14); --line-2:rgba(34,31,24,.08);
  --shadow:0 18px 48px -24px rgba(34,31,24,.42);
  --shadow-s:0 8px 22px -14px rgba(34,31,24,.4);
  --serif:"Noto Serif TC",serif; --cormorant:"Cormorant Garamond",serif;
  --sans:"Noto Sans TC",system-ui,sans-serif;
  --maxw:1200px; --r:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:var(--sans); color:var(--ink);
  background:var(--paper);
  background-image:
    radial-gradient(circle at 12% 18%,rgba(181,138,65,.05),transparent 42%),
    radial-gradient(circle at 88% 82%,rgba(44,62,50,.06),transparent 45%);
  line-height:1.85; font-size:16px; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%; height:auto; display:block}
a{color:inherit; text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif); font-weight:600; line-height:1.32; text-wrap:balance; line-break:strict; margin:0}
p{text-wrap:pretty; line-break:strict; margin:0 0 1.1em}
.wrap{width:100%; max-width:var(--maxw); margin:0 auto; padding:0 clamp(20px,5vw,52px)}
.nowrap{white-space:nowrap}
section{position:relative}

/* ---------- eyebrow / headings ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:.6em;
  font-family:var(--sans); font-size:.74rem; font-weight:700;
  letter-spacing:.34em; color:var(--gold); text-transform:uppercase; margin:0 0 1.1rem;
}
.eyebrow::before{content:""; width:30px; height:1px; background:var(--gold)}
.eyebrow.cen::after{content:""; width:30px; height:1px; background:var(--gold)}
.eyebrow.cen{justify-content:center}
.h-xl{font-size:clamp(2.2rem,5.6vw,4rem)}
.h-lg{font-size:clamp(1.8rem,4vw,3rem)}
.h-md{font-size:clamp(1.4rem,2.6vw,2rem)}
.lede{font-size:clamp(1.02rem,1.5vw,1.18rem); color:var(--ink-soft); max-width:60ch}
.cormo{font-family:var(--cormorant); font-style:italic; font-weight:500}
.center{text-align:center} .center .lede{margin-inline:auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.6em; cursor:pointer;
  font-family:var(--sans); font-weight:600; font-size:.92rem; letter-spacing:.04em;
  padding:.85em 1.7em; border-radius:999px; border:1.5px solid transparent;
  transition:.32s cubic-bezier(.2,.7,.3,1); position:relative; white-space:nowrap;
}
.btn svg{width:1.05em; height:1.05em; transition:transform .32s}
.btn-primary{background:var(--tea); color:#F5F0E4; border-color:var(--tea)}
.btn-primary:hover{background:var(--tea-2); border-color:var(--gold); box-shadow:var(--shadow-s)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{background:transparent; color:var(--ink); border-color:var(--line)}
.btn-ghost:hover{border-color:var(--tea); color:var(--tea); background:rgba(44,62,50,.05)}
.btn-gold{background:var(--gold); color:#2a2310; border-color:var(--gold)}
.btn-gold:hover{background:var(--gold-2); box-shadow:var(--shadow-s)}

/* ---------- header / nav ---------- */
.site-head{position:fixed; inset:0 0 auto 0; z-index:60; transition:.4s}
.site-head .bar{
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  padding:clamp(14px,2vw,22px) 0; transition:.4s;
}
.site-head::after{content:""; position:absolute; inset:0; background:rgba(245,240,228,.86);
  backdrop-filter:blur(10px); border-bottom:1px solid transparent; opacity:0; transition:.4s; z-index:-1}
.site-head.scrolled::after{opacity:1; border-bottom-color:var(--line)}
.brand{display:flex; align-items:center; gap:.7rem; z-index:2}
.brand .logo{width:40px; height:40px; flex:none}
.brand .wm{display:flex; flex-direction:column; line-height:1.18; gap:.18em}
.brand .wm b{font-family:var(--serif); font-size:1.18rem; letter-spacing:.16em; color:var(--ink)}
.brand .wm span{font-family:var(--cormorant); font-style:italic; font-size:.74rem; letter-spacing:.3em; color:var(--gold); text-transform:uppercase}
.nav{display:flex; align-items:center; gap:clamp(1.1rem,2vw,2.1rem)}
.nav a{font-size:.95rem; font-weight:500; color:var(--ink-soft); position:relative; padding:.2em 0}
.nav a::after{content:""; position:absolute; left:0; bottom:-2px; width:0; height:1.5px; background:var(--gold); transition:.3s}
.nav a:hover,.nav a.active{color:var(--tea)}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav .cart{display:inline-flex; align-items:center; gap:.4em; color:var(--tea); font-weight:600}
.nav .cart svg{width:20px; height:20px}

/* hamburger */
.burger{display:none; width:46px; height:46px; border:1px solid var(--line); border-radius:12px;
  background:rgba(245,240,228,.7); cursor:pointer; position:relative; z-index:80}
.burger span{position:absolute; left:11px; width:24px; height:2px; background:var(--ink); border-radius:2px; transition:.34s}
.burger span:nth-child(1){top:15px} .burger span:nth-child(2){top:22px} .burger span:nth-child(3){top:29px}
.burger.open span:nth-child(1){top:22px; transform:rotate(45deg)}
.burger.open span:nth-child(2){opacity:0; transform:scaleX(.2)}
.burger.open span:nth-child(3){top:22px; transform:rotate(-45deg)}
.mobile-nav{position:fixed; inset:0; z-index:70; background:var(--tea);
  display:flex; flex-direction:column; justify-content:center; gap:.4rem; padding:2rem clamp(28px,8vw,60px);
  transform:translateY(-100%); transition:transform .5s cubic-bezier(.6,0,.2,1); overflow-y:auto}
.mobile-nav.open{transform:translateY(0)}
.mobile-nav a{font-family:var(--serif); font-size:clamp(1.7rem,7vw,2.4rem); color:#EFE7D5;
  padding:.32em 0; border-bottom:1px solid rgba(231,212,168,.2); display:flex; align-items:center; justify-content:space-between}
.mobile-nav a .en{font-family:var(--cormorant); font-style:italic; font-size:.95rem; color:var(--gold-soft); letter-spacing:.2em}
.mobile-nav a:hover{color:var(--gold-2)}

/* ---------- hero ---------- */
.hero{position:relative; min-height:100svh; display:flex; align-items:flex-end; overflow:hidden}
.hero .bg{position:absolute; inset:0}
.hero .bg img{width:100%; height:100%; object-fit:cover}
/* 遮罩加深，尤其底部文字區，確保金色/白色 hero 文字在亮霧背景上對比足夠 */
.hero .bg::after{content:""; position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(20,24,18,.42) 0%,rgba(20,24,18,.28) 40%,rgba(20,24,18,.82) 100%)}
.hero .inner{position:relative; z-index:2; padding-bottom:clamp(56px,9vh,120px); padding-top:140px; color:#F5F0E4; max-width:760px}
.hero .eyebrow{color:var(--gold-soft); text-shadow:0 1px 8px rgba(0,0,0,.5)}
.hero .eyebrow::before{background:var(--gold-soft)}
.hero h1{color:#FBF7EC; font-size:clamp(2.6rem,7vw,5.2rem); text-shadow:0 2px 24px rgba(0,0,0,.55)}
.hero h1 .cormo{color:var(--gold-soft); display:block; font-size:.5em; margin-top:.3em; letter-spacing:.04em; text-shadow:0 1px 10px rgba(0,0,0,.5)}
.hero p{color:rgba(245,240,228,.92); font-size:clamp(1rem,1.6vw,1.2rem); max-width:48ch; margin-top:1.2rem}
.hero .cta{display:flex; gap:.9rem; flex-wrap:wrap; margin-top:2rem}
.hero .scroll-hint{position:absolute; bottom:26px; left:50%; transform:translateX(-50%); z-index:2;
  color:rgba(245,240,228,.7); font-size:.7rem; letter-spacing:.3em; display:flex; flex-direction:column; align-items:center; gap:.5rem}
.hero .scroll-hint i{width:1px; height:38px; background:linear-gradient(var(--gold-2),transparent); animation:drift 2s infinite}
@keyframes drift{0%{opacity:.2;transform:scaleY(.4)}50%{opacity:1}100%{opacity:.2;transform:scaleY(1)}}

/* ---------- generic section spacing ---------- */
.sec{padding:clamp(64px,10vw,128px) 0}
.sec-sm{padding:clamp(48px,7vw,84px) 0}
.bg-paper2{background:var(--paper-2)}
.bg-tea{background:var(--tea); color:#EFE7D5}
.bg-tea .eyebrow{color:var(--gold-2)} .bg-tea .eyebrow::before{background:var(--gold-2)}
.bg-tea h1,.bg-tea h2,.bg-tea h3{color:#F4ECDB}
.bg-tea .lede{color:rgba(239,231,213,.82)}

/* ---------- intro split ---------- */
.split{display:grid; grid-template-columns:1.05fr 1fr; gap:clamp(2rem,5vw,5rem); align-items:center}
.split.rev{grid-template-columns:1fr 1.05fr}
.media-frame{position:relative; border-radius:var(--r); overflow:hidden; box-shadow:var(--shadow)}
.media-frame img{width:100%; height:100%; object-fit:cover; aspect-ratio:4/5}
.media-frame.wide img{aspect-ratio:3/2}
.media-frame .tag{position:absolute; left:18px; bottom:18px; background:rgba(245,240,228,.92);
  color:var(--tea); font-size:.76rem; font-weight:600; letter-spacing:.1em; padding:.5em 1em; border-radius:999px}
.deco-line{display:flex; align-items:center; gap:1rem; color:var(--gold); margin:1.5rem 0; font-family:var(--cormorant); font-style:italic; font-size:1.05rem}
.deco-line::after{content:""; flex:1; height:1px; background:linear-gradient(90deg,var(--gold),transparent)}

/* stat row */
.stats{display:flex; flex-wrap:wrap; gap:clamp(1.4rem,4vw,3.4rem); margin-top:2rem}
.stats .st b{display:block; font-family:var(--serif); font-size:clamp(1.8rem,3.4vw,2.6rem); color:var(--tea); line-height:1}
.bg-tea .stats .st b{color:var(--gold-2)}
.stats .st span{font-size:.82rem; color:var(--ink-mute); letter-spacing:.04em}
.bg-tea .stats .st span{color:rgba(239,231,213,.7)}

/* ---------- product cards ---------- */
.grid-prod{display:grid; grid-template-columns:repeat(auto-fill,minmax(258px,1fr)); gap:clamp(1.2rem,2.4vw,2rem)}
.card{background:var(--paper); border:1px solid var(--line-2); border-radius:var(--r); overflow:hidden;
  transition:.4s cubic-bezier(.2,.7,.3,1); display:flex; flex-direction:column}
.card:hover{transform:translateY(-6px); box-shadow:var(--shadow); border-color:rgba(181,138,65,.4)}
.card .ph{position:relative; overflow:hidden; aspect-ratio:1/1; background:var(--paper-3)}
.card .ph img{width:100%; height:100%; object-fit:cover; transition:transform .6s}
.card:hover .ph img{transform:scale(1.06)}
.card .badge{position:absolute; top:12px; left:12px; background:var(--rouge); color:#fff;
  font-size:.68rem; font-weight:700; letter-spacing:.08em; padding:.36em .8em; border-radius:999px}
.card .badge.gold{background:var(--gold)}
.card .body{padding:1.2rem 1.3rem 1.4rem; display:flex; flex-direction:column; gap:.5rem; flex:1}
.card .origin{font-size:.74rem; letter-spacing:.18em; color:var(--gold); font-weight:700; text-transform:uppercase}
.card h3{font-size:1.18rem}
.card .desc{font-size:.86rem; color:var(--ink-mute); margin:0; flex:1}
.card .foot{display:flex; align-items:center; justify-content:space-between; margin-top:.6rem}
.card .price{font-family:var(--serif); font-size:1.15rem; color:var(--ink)}
.card .price s{font-size:.8rem; color:var(--ink-mute); margin-right:.4em; font-family:var(--sans)}
.icon-btn{width:42px; height:42px; border-radius:50%; border:1.5px solid var(--tea); background:transparent;
  color:var(--tea); display:grid; place-items:center; cursor:pointer; transition:.3s}
.icon-btn svg{width:18px; height:18px}
.icon-btn:hover{background:var(--tea); color:var(--paper)}

/* filter tabs */
.tabs{display:flex; flex-wrap:wrap; gap:.6rem; margin-bottom:2.4rem}
.tab{font-size:.88rem; font-weight:600; padding:.55em 1.2em; border-radius:999px; cursor:pointer;
  border:1px solid var(--line); color:var(--ink-soft); background:transparent; transition:.28s; font-family:var(--sans)}
.tab:hover{border-color:var(--tea); color:var(--tea)}
.tab.active{background:var(--tea); color:var(--paper); border-color:var(--tea)}

/* ---------- feature / craft list ---------- */
.steps{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:clamp(1.4rem,3vw,2.6rem); counter-reset:s}
.step{position:relative; padding-top:1.6rem; border-top:2px solid var(--line)}
.step::before{counter-increment:s; content:"0" counter(s); position:absolute; top:-1rem; left:0;
  font-family:var(--cormorant); font-style:italic; font-size:1.5rem; color:var(--gold); background:var(--paper-2); padding-right:.6rem}
.bg-tea .step{border-top-color:rgba(231,212,168,.25)}
.bg-tea .step::before{background:var(--tea)}
.step h3{font-size:1.18rem; margin-bottom:.5rem}
.step p{font-size:.9rem; color:var(--ink-mute); margin:0}
.bg-tea .step p{color:rgba(239,231,213,.72)}

/* feature icons */
.feat-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:clamp(1.4rem,3vw,2.4rem)}
.feat{display:flex; flex-direction:column; gap:.7rem}
.feat .ico{width:52px; height:52px; border-radius:14px; background:rgba(181,138,65,.12);
  display:grid; place-items:center; color:var(--gold)}
.feat .ico svg{width:26px; height:26px}
.feat h3{font-size:1.1rem}
.feat p{font-size:.88rem; color:var(--ink-mute); margin:0}

/* ---------- banner CTA ---------- */
.cta-band{position:relative; overflow:hidden; border-radius:var(--r); padding:clamp(2.6rem,6vw,4.8rem);
  background:var(--tea); color:#EFE7D5; text-align:center}
.cta-band::before{content:""; position:absolute; inset:0; opacity:.16;
  background:radial-gradient(circle at 20% 30%,var(--gold-2),transparent 40%),radial-gradient(circle at 80% 70%,var(--tea-3),transparent 45%)}
.cta-band>*{position:relative}

/* ---------- product detail ---------- */
.pd{display:grid; grid-template-columns:1.05fr 1fr; gap:clamp(2rem,4vw,4rem); align-items:start}
.gallery .main{border-radius:var(--r); overflow:hidden; box-shadow:var(--shadow); background:var(--paper-3); aspect-ratio:1/1}
.gallery .main img{width:100%; height:100%; object-fit:cover}
.thumbs{display:flex; gap:.7rem; margin-top:.9rem}
.thumbs button{width:74px; height:74px; border-radius:10px; overflow:hidden; border:2px solid transparent; cursor:pointer; padding:0; background:var(--paper-3)}
.thumbs button.active{border-color:var(--gold)}
.thumbs img{width:100%; height:100%; object-fit:cover}
.pd .origin{font-size:.76rem; letter-spacing:.2em; color:var(--gold); font-weight:700; text-transform:uppercase}
.pd .price{font-family:var(--serif); font-size:1.8rem; color:var(--tea); margin:.4rem 0 1rem}
.pd .opts{margin:1.4rem 0}
.pd .opts label{display:block; font-size:.82rem; font-weight:700; letter-spacing:.06em; color:var(--ink-soft); margin-bottom:.6rem}
.chip-row{display:flex; gap:.6rem; flex-wrap:wrap}
.chip{padding:.5em 1.1em; border:1.5px solid var(--line); border-radius:10px; cursor:pointer; font-size:.88rem; font-weight:600; transition:.25s; background:transparent}
.chip:hover{border-color:var(--tea)}
.chip.active{border-color:var(--tea); background:rgba(44,62,50,.08); color:var(--tea)}
.qty{display:inline-flex; align-items:center; border:1.5px solid var(--line); border-radius:10px; overflow:hidden}
.qty button{width:42px; height:44px; background:transparent; border:none; cursor:pointer; font-size:1.2rem; color:var(--tea)}
.qty button:hover{background:rgba(44,62,50,.08)}
.qty input{width:46px; height:44px; text-align:center; border:none; background:transparent; font-size:1rem; font-family:var(--serif)}
.buy-row{display:flex; gap:.8rem; flex-wrap:wrap; align-items:center; margin-top:1.4rem}
.flavor{display:flex; flex-wrap:wrap; gap:.5rem; margin:1rem 0}
.flavor span{font-size:.78rem; padding:.4em .9em; border-radius:999px; background:rgba(181,138,65,.13); color:var(--clay); font-weight:600}

/* accordion */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-q{width:100%; text-align:left; background:transparent; border:none; cursor:pointer;
  padding:1.15em 0; display:flex; align-items:center; justify-content:space-between; gap:1rem;
  font-family:var(--serif); font-size:1.06rem; color:var(--ink)}
.acc-q .pm{width:22px; height:22px; flex:none; position:relative; transition:.3s}
.acc-q .pm::before,.acc-q .pm::after{content:""; position:absolute; background:var(--gold); inset:50% 0 auto 0; height:2px; transform:translateY(-50%)}
.acc-q .pm::after{transform:translateY(-50%) rotate(90deg); transition:.3s}
.acc-item.open .acc-q .pm::after{transform:translateY(-50%) rotate(0)}
.acc-a{overflow:hidden; max-height:0; transition:max-height .4s ease}
.acc-a p{padding:0 0 1.2em; margin:0; color:var(--ink-soft); font-size:.94rem}

/* ---------- breadcrumb ---------- */
.crumb{font-size:.82rem; color:var(--ink-mute); display:flex; gap:.5em; align-items:center; flex-wrap:wrap}
.crumb a:hover{color:var(--gold)}
.crumb svg{width:14px; height:14px; opacity:.6}

/* page hero (sub pages) */
.page-hero{padding:clamp(120px,16vh,180px) 0 clamp(40px,6vw,72px); position:relative}
.page-hero .eyebrow{color:var(--gold)}

/* ---------- story timeline ---------- */
.tl{position:relative; margin-top:2.5rem; padding-left:2rem}
.tl::before{content:""; position:absolute; left:6px; top:6px; bottom:6px; width:2px; background:linear-gradient(var(--gold),var(--line))}
.tl-item{position:relative; padding-bottom:2.4rem}
.tl-item::before{content:""; position:absolute; left:-2rem; top:6px; width:14px; height:14px; border-radius:50%; background:var(--paper); border:3px solid var(--gold)}
.tl-item .yr{font-family:var(--cormorant); font-style:italic; color:var(--gold); font-size:1.15rem}
.tl-item h3{font-size:1.2rem; margin:.2rem 0 .5rem}
.tl-item p{font-size:.92rem; color:var(--ink-soft); margin:0}
/* 深綠（bg-tea）背景上的時間軸：標題/說明改亮色、金點改亮金，確保對比足夠 */
.bg-tea .tl-item .yr{color:var(--gold-soft)}
.bg-tea .tl-item h3{color:#F4ECDB}
.bg-tea .tl-item p{color:rgba(239,231,213,.78)}
.bg-tea .tl-item::before{background:var(--tea); border-color:var(--gold-soft)}
.bg-tea .tl::before{background:linear-gradient(var(--gold-soft),rgba(231,212,168,.2))}

/* quote */
.pull{font-family:var(--serif); font-size:clamp(1.4rem,3vw,2.2rem); line-height:1.7; color:var(--tea); text-align:center; max-width:24ch; margin:0 auto; position:relative}
.pull::before{content:"「"; color:var(--gold); font-size:1.4em; line-height:0}
.pull::after{content:"」"; color:var(--gold)}

/* ---------- contact ---------- */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:clamp(2rem,4vw,3.4rem)}
.info-block{margin-bottom:1.7rem}
.info-block .k{font-size:.74rem; letter-spacing:.18em; text-transform:uppercase; color:var(--gold); font-weight:700; margin-bottom:.3rem}
.info-block .v{font-size:1.02rem; color:var(--ink)}
.field{margin-bottom:1.1rem}
.field label{display:block; font-size:.82rem; font-weight:600; margin-bottom:.4rem; color:var(--ink-soft)}
.field input,.field textarea,.field select{width:100%; padding:.85em 1em; border:1.5px solid var(--line); border-radius:10px;
  background:var(--paper); font-family:var(--sans); font-size:.95rem; color:var(--ink); transition:.25s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none; border-color:var(--gold); box-shadow:0 0 0 3px rgba(181,138,65,.14)}
.field textarea{min-height:130px; resize:vertical}
.map-card{border-radius:var(--r); overflow:hidden; border:1px solid var(--line); background:var(--paper-2)}
.map-card svg{display:block; width:100%; height:auto}
.form-note{font-size:.8rem; color:var(--ink-mute); margin-top:.4rem}
.toast{position:fixed; left:50%; bottom:28px; transform:translateX(-50%) translateY(140%);
  background:var(--tea); color:#EFE7D5; padding:.9em 1.5em; border-radius:999px; box-shadow:var(--shadow);
  z-index:120; transition:transform .45s cubic-bezier(.2,.8,.2,1); font-size:.92rem; display:flex; gap:.6em; align-items:center;visibility:hidden;opacity:0}
.toast.show{transform:translateX(-50%) translateY(0);visibility:visible;opacity:1}
.toast svg{width:18px; height:18px; color:var(--gold-2)}

/* ---------- footer ---------- */
.site-foot{background:var(--tea); color:#D9D2C2; padding:clamp(56px,8vw,92px) 0 2rem; margin-top:0}
.foot-top{display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:clamp(1.6rem,3vw,3rem)}
.site-foot .brand .wm b{color:#F4ECDB}
.site-foot h4{font-family:var(--sans); font-size:.78rem; letter-spacing:.2em; text-transform:uppercase; color:var(--gold-2); margin:0 0 1.1rem; font-weight:700}
.site-foot a{color:#D9D2C2; font-size:.92rem; display:block; padding:.3em 0; transition:.25s}
.site-foot a:hover{color:var(--gold-2); transform:translateX(3px)}
.foot-about p{font-size:.9rem; color:rgba(217,210,194,.8); margin:1rem 0 0}
.foot-bot{display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between; align-items:center;
  border-top:1px solid rgba(231,212,168,.18); margin-top:clamp(2.4rem,5vw,3.6rem); padding-top:1.6rem;
  font-size:.82rem; color:rgba(217,210,194,.7)}
.foot-bot .credit a{display:inline; color:var(--gold-2); font-weight:600; text-decoration:underline; text-underline-offset:3px}
.foot-bot .credit a:hover{color:var(--gold-soft); transform:none}

/* ---------- back to top ---------- */
.to-top{position:fixed; right:clamp(16px,3vw,30px); bottom:clamp(16px,3vw,30px); z-index:90;
  width:52px; height:52px; border-radius:50%; border:1.5px solid var(--gold);
  background:var(--tea); color:var(--gold-2); display:grid; place-items:center; cursor:pointer;
  opacity:0; visibility:hidden; transform:translateY(18px) scale(.85); transition:.4s cubic-bezier(.2,.8,.2,1);
  box-shadow:var(--shadow-s)}
.to-top.show{opacity:1; visibility:visible; transform:translateY(0) scale(1)}
.to-top:hover{background:var(--tea-2); transform:translateY(-4px) rotate(360deg)}
.to-top svg{width:22px; height:22px}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0; transform:translateY(26px); transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.3,1)}
[data-reveal].in{opacity:1; transform:none}
.no-js [data-reveal]{opacity:1; transform:none}

/* seal mark */
.seal{display:inline-grid; place-items:center; width:46px; height:46px; border-radius:8px;
  background:var(--rouge); color:#F5E9D8; font-family:var(--serif); font-size:1.3rem; transform:rotate(-3deg)}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .split,.split.rev,.pd,.contact-grid{grid-template-columns:1fr; gap:2rem}
  .foot-top{grid-template-columns:1fr 1fr}
  .split.rev .media-frame{order:-1}
}
@media(max-width:760px){
  .nav{display:none}
  .burger{display:block}
  .hero{min-height:92svh}
  .foot-top{grid-template-columns:1fr 1fr; gap:1.8rem}
  .foot-about{grid-column:1/-1}
}
@media(max-width:480px){
  body{font-size:15.5px}
  .foot-top{grid-template-columns:1fr}
  .thumbs button{width:62px; height:62px}
  .hero .cta{flex-direction:column; align-items:flex-start}
  .hero .cta .btn{width:100%; justify-content:center}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important; scroll-behavior:auto!important}
  [data-reveal]{opacity:1!important; transform:none!important}
}

/* ---------- cart badge ---------- */
.cart{position:relative}
.cart-badge{position:absolute; top:-6px; right:-9px; min-width:17px; height:17px; padding:0 4px;
  background:var(--gold); color:#2a2310; font-size:.66rem; font-weight:700; border-radius:999px;
  place-items:center; line-height:1}
.mobile-nav .cart-badge{position:static; display:inline-grid; margin-left:.5em}

/* ---------- cart page ---------- */
.cart-wrap{display:grid; grid-template-columns:1fr 340px; gap:clamp(2rem,4vw,3.4rem); align-items:start; margin-top:2.5rem}
.cart-row{display:grid; grid-template-columns:84px 1fr auto auto auto; gap:1rem; align-items:center;
  padding:1.1rem 0; border-bottom:1px solid var(--line)}
.cart-row:first-child{border-top:1px solid var(--line)}
.cart-thumb{width:84px; height:84px; border-radius:12px; overflow:hidden; background:var(--paper-3)}
.cart-thumb img{width:100%; height:100%; object-fit:cover}
.cart-name{font-family:var(--serif); font-size:1.05rem; font-weight:600; margin:0}
.cart-variant{font-size:.82rem; color:var(--ink-mute); margin:.15rem 0 0}
.cart-unit{font-size:.84rem; color:var(--ink-soft); margin:.2rem 0 0}
.cart-qty{display:inline-flex; align-items:center; border:1.5px solid var(--line); border-radius:999px; overflow:hidden}
.cart-qty button{width:34px; height:36px; background:transparent; border:none; cursor:pointer; font-size:1.1rem; color:var(--tea)}
.cart-qty input{width:34px; text-align:center; border:none; background:transparent; font-size:.95rem; font-family:var(--sans)}
.cart-line{font-family:var(--serif); font-weight:600; color:var(--tea); min-width:80px; text-align:right}
.cart-del{background:transparent; border:none; cursor:pointer; color:var(--ink-mute); padding:.4em; border-radius:8px; transition:.2s}
.cart-del:hover{color:#a23; background:rgba(170,34,34,.07)}
.cart-summary{background:var(--paper-2); border:1px solid var(--line); border-radius:var(--r); padding:1.6rem 1.5rem; position:sticky; top:96px}
.cart-summary h3{font-size:1.15rem; margin-bottom:1rem}
.sum-line{display:flex; justify-content:space-between; padding:.5rem 0; font-size:.95rem; color:var(--ink-soft)}
.sum-line.total{border-top:1.5px solid var(--line); margin-top:.5rem; padding-top:.9rem; font-family:var(--serif);
  font-size:1.2rem; font-weight:700; color:var(--tea)}
.ship-hint{font-size:.8rem; color:var(--gold); margin:.3rem 0 1rem}
.cart-empty{text-align:center; padding:clamp(3rem,8vw,6rem) 1rem}
.cart-empty svg{width:54px; height:54px; color:var(--line); margin-bottom:1rem}

/* ---------- checkout ---------- */
.co-grid{display:grid; grid-template-columns:1fr 360px; gap:clamp(2rem,4vw,3.4rem); align-items:start; margin-top:2.5rem}
.co-card{background:var(--paper-2); border:1px solid var(--line); border-radius:var(--r); padding:1.6rem 1.5rem; position:sticky; top:96px}
.co-card h3{font-size:1.15rem; margin-bottom:1rem}
.co-line{display:flex; justify-content:space-between; gap:1rem; padding:.5rem 0; font-size:.92rem; color:var(--ink-soft)}
.co-line.co-sub{border-top:1px solid var(--line); margin-top:.5rem; padding-top:.8rem}
.co-line.co-total{border-top:1.5px solid var(--line); margin-top:.4rem; padding-top:.8rem;
  font-family:var(--serif); font-size:1.2rem; font-weight:700; color:var(--tea)}
.field-row{display:grid; grid-template-columns:1fr 1fr; gap:1rem}
.pay-opts{display:grid; gap:.7rem}
.pay-opt{display:flex; align-items:center; gap:.7rem; padding:.9em 1em; border:1.5px solid var(--line); border-radius:12px; cursor:pointer; transition:.2s}
.pay-opt:has(input:checked){border-color:var(--gold); background:rgba(181,138,65,.06)}
.pay-opt input{accent-color:var(--tea)}
.co-done{text-align:center; padding:clamp(2.5rem,7vw,5rem) 1rem; max-width:520px; margin:0 auto}
.co-done-ic{width:64px; height:64px; border-radius:50%; background:var(--tea); color:var(--gold-soft);
  display:grid; place-items:center; margin:0 auto 1.4rem}
.co-done-ic svg{width:30px; height:30px}
/* 完成畫面的兩顆按鈕：置中並拉開間距（通用 .cta 無 gap，會緊貼）。 */
.co-done .cta{display:flex; justify-content:center; gap:1rem; flex-wrap:wrap}

/* ---------- account / auth ---------- */
.auth-wrap{max-width:460px; margin:2.5rem auto 0}
.auth-tabs{display:flex; gap:.5rem; background:var(--paper-2); padding:.4rem; border-radius:999px; margin-bottom:1.6rem}
.auth-tabs button{flex:1; padding:.7em; border:none; background:transparent; border-radius:999px; cursor:pointer;
  font-family:var(--sans); font-size:.95rem; font-weight:600; color:var(--ink-soft); transition:.25s}
.auth-tabs button.active{background:var(--tea); color:var(--paper)}
.auth-card{background:var(--paper-2); border:1px solid var(--line); border-radius:var(--r); padding:clamp(1.6rem,3vw,2.2rem)}
.acc-head{display:flex; align-items:center; gap:1rem; margin-bottom:1.8rem}
.acc-avatar{width:60px; height:60px; border-radius:50%; background:var(--tea); color:var(--gold-soft);
  display:grid; place-items:center; font-family:var(--serif); font-size:1.5rem; flex:none}
.acc-grid{display:grid; grid-template-columns:1fr 1fr; gap:1rem; margin-top:1.5rem}
.acc-tile{background:var(--paper-2); border:1px solid var(--line); border-radius:14px; padding:1.2rem}
.acc-tile .k{font-size:.74rem; letter-spacing:.14em; text-transform:uppercase; color:var(--gold); font-weight:700}
.acc-tile .v{font-size:1.05rem; color:var(--ink); margin-top:.3rem}

@media(max-width:860px){
  .cart-wrap,.co-grid{grid-template-columns:1fr}
  .cart-summary,.co-card{position:static}
  .cart-row{grid-template-columns:64px 1fr auto; grid-template-areas:"thumb info del" "thumb qty line"; row-gap:.6rem}
  .cart-thumb{grid-area:thumb; width:64px; height:64px} .cart-info{grid-area:info} .cart-qty{grid-area:qty}
  .cart-line{grid-area:line; text-align:left} .cart-del{grid-area:del; justify-self:end}
  .acc-grid,.field-row{grid-template-columns:1fr}
}