/* =========================================================================
   臨滄 / 普洱 古樹茶 — B2B Export Site
   Design language: "provenance dossier" — an editorial field-record for
   high-altitude ancient-tree tea, not a generic SaaS template.
   System fonts only (zero external font requests).
   ========================================================================= */

:root{
  /* ---- palette: brewed-tea & mountain-mineral tones ---- */
  --paper:        #EFE9DC;   /* warm stone paper — main bg */
  --paper-deep:   #E4DCC8;   /* slightly deeper paper, section alternation */
  --ink:          #241B14;   /* near-black brewed-tea ink — primary text */
  --ink-soft:     #4A3D30;   /* secondary text */
  --bark:         #241B14;
  --dark:         #201A13;   /* deep roast-brown — dark sections */
  --dark-2:       #2E251A;
  --copper:       #A97D4F;   /* aged copper / tea-liquor accent */
  --copper-deep:  #8A6238;
  --jade:         #5C7A63;   /* tea-leaf jade — secondary accent */
  --jade-deep:    #445A4A;
  --line:         rgba(36,27,20,0.14);
  --line-strong:  rgba(36,27,20,0.28);
  --line-on-dark: rgba(239,233,220,0.18);

  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --maxw: 1240px;
  --radius: 2px; /* deliberately near-square — this is a dossier, not app cards */
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family:var(--serif); font-weight:400; margin:0 0 .5em; letter-spacing:.005em; }
p{ margin:0 0 1em; }
.container{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.dark{ background:var(--dark); color:var(--paper); }
.dark .eyebrow, .dark h2, .dark h3{ color:var(--paper); }
.deep{ background:var(--paper-deep); }

/* focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:2px solid var(--copper); outline-offset:2px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---- small structural label (used sparingly — not tracked-out caps everywhere) ---- */
.eyebrow{
  font-family:var(--serif); font-style:italic; font-size:15px; color:var(--copper-deep);
  margin:0 0 10px; display:block;
}

/* ---- elevation marker motif — real terroir data, used as a structural device ---- */
.elev{
  display:inline-flex; align-items:baseline; gap:6px; font-family:var(--serif);
  border-bottom:1px solid var(--line-strong); padding-bottom:2px;
}
.elev b{ font-size:1.3em; }

/* =========================== HEADER / NAV =============================== */
.site-header{
  position:sticky; top:0; z-index:200;
  background:rgba(239,233,220,0.96); backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
}
.header-row{ display:flex; align-items:center; justify-content:space-between; gap:24px; height:76px; }
.logo{ display:flex; align-items:center; gap:10px; font-family:var(--serif); font-size:22px; color:var(--ink); flex:0 0 auto; }
.logo svg{ width:34px; height:34px; flex:none; }
.logo .logo-sub{ display:block; font-family:var(--sans); font-size:10.5px; letter-spacing:.14em; color:var(--ink-soft); }

.main-nav{ display:flex; align-items:center; gap:2px; flex:1; justify-content:center; }
.main-nav a{
  font-size:14.5px; padding:10px 16px; color:var(--ink-soft); position:relative; white-space:nowrap;
}
.main-nav a::after{
  content:""; position:absolute; left:16px; right:16px; bottom:6px; height:1px; background:var(--copper);
  transform:scaleX(0); transform-origin:left; transition:transform .25s ease;
}
.main-nav a:hover{ color:var(--ink); }
.main-nav a:hover::after,.main-nav a[aria-current="page"]::after{ transform:scaleX(1); }
.main-nav a[aria-current="page"]{ color:var(--ink); }

.header-actions{ display:flex; align-items:center; gap:14px; flex:0 0 auto; }

.lang-switch{ position:relative; }
.lang-switch select{
  appearance:none; -webkit-appearance:none; background:transparent;
  border:1px solid var(--line-strong); border-radius:var(--radius); padding:8px 30px 8px 12px;
  font-family:var(--sans); font-size:13.5px; color:var(--ink); cursor:pointer;
}
.lang-switch::after{
  content:""; position:absolute; right:11px; top:50%; width:7px; height:7px;
  border-right:1px solid var(--ink-soft); border-bottom:1px solid var(--ink-soft);
  transform:translateY(-65%) rotate(45deg); pointer-events:none;
}
[dir="rtl"] .lang-switch select{ padding:8px 12px 8px 30px; }
[dir="rtl"] .lang-switch::after{ right:auto; left:11px; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--sans); font-size:14px; padding:12px 22px; border-radius:var(--radius);
  border:1px solid transparent; cursor:pointer; transition:transform .18s ease, box-shadow .18s ease, background .2s ease;
  line-height:1;
}
.btn-primary{ background:var(--copper); color:#fff; }
.btn-primary:hover{ background:var(--copper-deep); transform:translateY(-1px); box-shadow:0 6px 16px rgba(138,98,56,.28); }
.btn-outline{ background:transparent; border-color:var(--line-strong); color:var(--ink); }
.btn-outline:hover{ border-color:var(--ink); }
.dark .btn-outline{ border-color:var(--line-on-dark); color:var(--paper); }
.dark .btn-outline:hover{ border-color:var(--paper); }

.nav-toggle{ display:none; }

/* =========================== HERO ======================================= */
.hero{
  position:relative; background:var(--dark); color:var(--paper); overflow:hidden;
}
.hero-grid{
  display:grid; grid-template-columns:1.05fr .95fr; align-items:stretch; min-height:640px;
}
.hero-copy{ padding:110px 56px 90px; display:flex; flex-direction:column; justify-content:center; position:relative; z-index:2; }
.hero-copy h1{
  font-size:clamp(34px,4.6vw,58px); line-height:1.08; margin-bottom:22px; color:var(--paper);
}
.hero-copy .lede{ font-size:17.5px; color:rgba(239,233,220,.82); max-width:46ch; margin-bottom:34px; }
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:44px; }
.hero-stats{ display:flex; gap:0; border-top:1px solid var(--line-on-dark); padding-top:24px; flex-wrap:wrap; }
.hero-stats div{ padding:0 26px 0 0; margin-right:26px; border-right:1px solid var(--line-on-dark); }
.hero-stats div:last-child{ border-right:none; }
.hero-stats b{ display:block; font-family:var(--serif); font-size:24px; color:var(--paper); }
.hero-stats span{ font-size:12.5px; color:rgba(239,233,220,.65); }

.hero-visual{ position:relative; }
.hero-visual img{ width:100%; height:100%; object-fit:cover; min-height:420px; }
.hero-visual::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(90deg, var(--dark) 0%, rgba(32,26,19,0) 16%);
}
.hero-topo{ position:absolute; inset:0; opacity:.16; pointer-events:none; z-index:1; }

/* =========================== SECTIONS ==================================== */
section{ padding:96px 0; }
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head h2{ font-size:clamp(26px,3vw,36px); }
.section-head p{ color:var(--ink-soft); font-size:16px; }

/* origin / terroir — editorial two-col with elevation markers, not cards */
.origin{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.origin-facts{ list-style:none; margin:28px 0 0; padding:0; display:grid; gap:20px; }
.origin-facts li{ display:grid; grid-template-columns:120px 1fr; gap:18px; padding-top:18px; border-top:1px solid var(--line); }
.origin-facts b{ font-family:var(--serif); font-size:15px; color:var(--copper-deep); }
.origin img{ border:1px solid var(--line-strong); }

/* strengths grid — thin hairline dividers, no shadow cards */
.strengths{ display:grid; grid-template-columns:repeat(4,1fr); }
.strength{ padding:30px 26px 0; border-top:2px solid var(--ink); }
.strength svg{ width:30px; height:30px; margin-bottom:18px; color:var(--copper); }
.strength h3{ font-size:18px; margin-bottom:10px; }
.strength p{ font-size:14.5px; color:var(--ink-soft); margin:0; }

/* craft gallery — picking & making, builds trust */
.craft{ display:grid; grid-template-columns:repeat(4,1fr); gap:2px; background:var(--line-strong); }
.craft figure{ margin:0; background:var(--paper); position:relative; overflow:hidden; }
.craft img{ width:100%; aspect-ratio:4/3; object-fit:cover; transition:transform .5s ease; }
.craft figure:hover img{ transform:scale(1.045); }
.craft figcaption{
  position:absolute; left:0; right:0; bottom:0; padding:14px 16px;
  background:linear-gradient(0deg, rgba(32,26,19,.82), transparent);
  color:#fff; font-size:13px;
}

/* product grid */
.product-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:2px 28px; }
.product-card{ padding-bottom:34px; border-bottom:1px solid var(--line); }
.product-card .thumb{ position:relative; overflow:hidden; border:1px solid var(--line-strong); margin-bottom:18px; }
.product-card .thumb img{ width:100%; aspect-ratio:1/1; object-fit:cover; transition:transform .45s ease; }
.product-card:hover .thumb img{ transform:scale(1.05); }
.product-card .tag{
  position:absolute; top:12px; left:12px; background:var(--dark); color:var(--paper);
  font-size:11px; padding:5px 10px; letter-spacing:.04em;
}
[dir="rtl"] .product-card .tag{ left:auto; right:12px; }
.product-card h3{ font-size:19px; margin-bottom:6px; }
.product-card p{ font-size:14px; color:var(--ink-soft); margin-bottom:14px; }
.product-card .row{ display:flex; align-items:center; justify-content:space-between; }
.product-card .more{ font-size:13.5px; color:var(--copper-deep); border-bottom:1px solid var(--copper-deep); padding-bottom:2px; }

/* testimonials */
.testimonials{ display:grid; grid-template-columns:repeat(3,1fr); gap:44px; }
.testimonial blockquote{ margin:0 0 18px; font-family:var(--serif); font-size:18px; line-height:1.5; color:var(--paper); }
.testimonial cite{ font-style:normal; font-size:13.5px; color:rgba(239,233,220,.65); display:block; }
.testimonial .stars{ margin-bottom:16px; color:var(--copper); letter-spacing:2px; font-size:15px; }

/* why-us / compliance strip */
.why-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; }
.why-list{ list-style:none; margin:0; padding:0; }
.why-list li{ display:flex; gap:16px; padding:22px 0; border-top:1px solid var(--line); }
.why-list li:last-child{ border-bottom:1px solid var(--line); }
.why-list svg{ flex:none; width:22px; height:22px; margin-top:2px; color:var(--jade-deep); }
.why-list h4{ font-family:var(--sans); font-weight:600; font-size:15.5px; margin:0 0 4px; }
.why-list p{ font-size:14px; color:var(--ink-soft); margin:0; }

.compliance-marks{ display:flex; gap:28px; flex-wrap:wrap; margin-top:34px; }
.mark{ display:flex; align-items:center; gap:10px; border:1px solid var(--line-strong); padding:10px 16px; font-size:13px; }
.mark svg{ width:20px; height:20px; color:var(--jade-deep); }

/* CTA / inquiry band */
.cta-band{ display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; }
.inquiry-form{ display:grid; gap:14px; }
.inquiry-form .two{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.field label{ display:block; font-size:12.5px; color:rgba(239,233,220,.7); margin-bottom:6px; }
.field input,.field select,.field textarea{
  width:100%; background:rgba(239,233,220,.06); border:1px solid var(--line-on-dark);
  color:var(--paper); padding:12px 14px; font-family:var(--sans); font-size:14.5px; border-radius:var(--radius);
}
.field textarea{ min-height:110px; resize:vertical; }
.field input::placeholder,.field textarea::placeholder{ color:rgba(239,233,220,.4); }
.field input:focus,.field select:focus,.field textarea:focus{ border-color:var(--copper); outline:none; }

/* breadcrumb */
.breadcrumb{ font-size:13px; color:var(--ink-soft); padding:22px 0; }
.breadcrumb a{ color:var(--ink-soft); }
.breadcrumb a:hover{ color:var(--copper-deep); }
.breadcrumb span[aria-hidden]{ margin:0 8px; opacity:.5; }

/* page header band (interior pages) */
.page-hero{ background:var(--dark); color:var(--paper); padding:64px 0 54px; }
.page-hero .eyebrow{ color:var(--copper); }
.page-hero h1{ font-size:clamp(30px,4vw,44px); color:var(--paper); max-width:780px; }
.page-hero p{ color:rgba(239,233,220,.78); max-width:60ch; }

/* pagination */
.pagination{ display:flex; gap:6px; justify-content:center; flex-wrap:wrap; margin-top:56px; }
.pagination a,.pagination span{
  min-width:38px; height:38px; display:inline-flex; align-items:center; justify-content:center;
  border:1px solid var(--line-strong); font-size:13.5px; padding:0 10px; color:var(--ink-soft);
}
.pagination a:hover{ border-color:var(--ink); color:var(--ink); }
.pagination .current{ background:var(--ink); color:var(--paper); border-color:var(--ink); }
.pagination .disabled{ opacity:.4; }

/* list rows (news / industry reports) */
.report-list{ list-style:none; margin:0; padding:0; }
.report-row{ display:grid; grid-template-columns:120px 1fr auto; gap:26px; align-items:center; padding:26px 0; border-top:1px solid var(--line); }
.report-row:last-child{ border-bottom:1px solid var(--line); }
.report-row .date{ font-family:var(--serif); font-size:14px; color:var(--copper-deep); }
.report-row h3{ font-size:18px; margin:0 0 6px; }
.report-row p{ font-size:14px; color:var(--ink-soft); margin:0; }
.report-row .thumb img{ width:120px; aspect-ratio:4/3; object-fit:cover; border:1px solid var(--line-strong); }

/* FAQ accordion */
.faq-list{ max-width:820px; }
.faq-item{ border-top:1px solid var(--line); }
.faq-item:last-child{ border-bottom:1px solid var(--line); }
.faq-q{
  width:100%; text-align:left; background:none; border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:22px 0; font-family:var(--serif); font-size:18px; color:var(--ink);
}
[dir="rtl"] .faq-q{ text-align:right; }
.faq-q .plus{ flex:none; width:20px; height:20px; position:relative; }
.faq-q .plus::before,.faq-q .plus::after{ content:""; position:absolute; background:var(--copper); }
.faq-q .plus::before{ top:9px; left:0; width:20px; height:1.5px; }
.faq-q .plus::after{ left:9px; top:0; width:1.5px; height:20px; transition:transform .25s ease; }
.faq-item.open .faq-q .plus::after{ transform:rotate(90deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .3s ease; }
.faq-a p{ padding:0 0 24px; color:var(--ink-soft); font-size:15px; max-width:70ch; }

/* product detail */
.pd-grid{ display:grid; grid-template-columns:.9fr 1.1fr; gap:64px; }
.pd-gallery-main{ border:1px solid var(--line-strong); margin-bottom:10px; }
.pd-gallery-main img{ width:100%; aspect-ratio:1/1; object-fit:cover; }
.pd-thumbs{ display:grid; grid-template-columns:repeat(4,1fr); gap:10px; }
.pd-thumbs img{ border:1px solid var(--line); aspect-ratio:1/1; object-fit:cover; cursor:pointer; }
.pd-specs{ list-style:none; margin:26px 0; padding:0; border-top:1px solid var(--line); }
.pd-specs li{ display:grid; grid-template-columns:150px 1fr; gap:14px; padding:14px 0; border-bottom:1px solid var(--line); font-size:14.5px; }
.pd-specs b{ color:var(--ink-soft); font-weight:600; font-size:13px; }
.pd-tabs{ display:flex; gap:2px; border-bottom:1px solid var(--line-strong); margin:56px 0 0; }
.pd-tab{ padding:14px 22px; font-size:14.5px; cursor:pointer; border-bottom:2px solid transparent; color:var(--ink-soft); }
.pd-tab.active{ color:var(--ink); border-color:var(--copper); }
.pd-panel{ padding:34px 0; display:none; }
.pd-panel.active{ display:block; }
.moq-box{ border:1px solid var(--line-strong); padding:20px; margin-top:22px; display:grid; gap:10px; }
.moq-box .row{ display:flex; justify-content:space-between; font-size:14px; border-bottom:1px dashed var(--line); padding-bottom:10px; }
.moq-box .row:last-child{ border:none; padding-bottom:0; }

/* contact page */
.contact-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:64px; }
.channel-list{ list-style:none; margin:0 0 34px; padding:0; }
.channel-list li{ display:flex; align-items:center; gap:14px; padding:14px 0; border-top:1px solid var(--line); }
.channel-list li:last-child{ border-bottom:1px solid var(--line); }
.channel-list svg{ width:22px; height:22px; color:var(--copper-deep); flex:none; }
.channel-list b{ display:block; font-size:14px; }
.channel-list span{ font-size:13.5px; color:var(--ink-soft); }
.msg-form{ background:var(--paper-deep); border:1px solid var(--line-strong); padding:40px; }
.msg-form .field{ margin-bottom:18px; }
.msg-form label{ display:block; font-size:13px; color:var(--ink-soft); margin-bottom:6px; }
.msg-form input,.msg-form textarea{
  width:100%; border:1px solid var(--line-strong); background:#fff; padding:13px 14px;
  font-family:var(--sans); font-size:14.5px; border-radius:var(--radius);
}
.msg-form textarea{ min-height:140px; resize:vertical; }
.map-embed{ border:1px solid var(--line-strong); aspect-ratio:16/8; background:var(--paper-deep); }

/* footer */
.site-footer{ background:var(--dark); color:rgba(239,233,220,.75); padding:72px 0 28px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:48px; margin-bottom:56px; }
.footer-grid h4{ font-family:var(--sans); font-weight:600; font-size:13px; letter-spacing:.06em; color:var(--paper); margin-bottom:16px; }
.footer-grid ul{ list-style:none; margin:0; padding:0; display:grid; gap:10px; font-size:14px; }
.footer-grid a:hover{ color:var(--paper); }
.footer-brand p{ font-size:14px; max-width:34ch; }
.footer-bottom{ border-top:1px solid var(--line-on-dark); padding-top:24px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:12.5px; }

/* ============================ FLOATING CONTACT DOCK ====================== */
.contact-dock{
  position:fixed; right:20px; top:50%; transform:translateY(-50%); z-index:500;
  display:flex; flex-direction:column; align-items:flex-end; gap:10px;
}
[dir="rtl"] .contact-dock{ right:auto; left:20px; align-items:flex-start; }
.dock-toggle{
  width:56px; height:56px; border-radius:50%; background:var(--copper); color:#fff; border:none;
  display:flex; align-items:center; justify-content:center; cursor:pointer; box-shadow:0 8px 20px rgba(0,0,0,.22);
  transition:transform .2s ease, background .2s ease;
}
.dock-toggle:hover{ background:var(--copper-deep); transform:scale(1.05); }
.dock-toggle svg{ width:26px; height:26px; }
.dock-panel{
  background:var(--dark); border:1px solid var(--line-on-dark); padding:14px; width:248px;
  display:flex; flex-direction:column; gap:6px; box-shadow:0 14px 34px rgba(0,0,0,.3);
  opacity:0; transform:translateX(14px); pointer-events:none; transition:opacity .2s ease, transform .2s ease;
}
[dir="rtl"] .dock-panel{ transform:translateX(-14px); }
.contact-dock.open .dock-panel{ opacity:1; transform:none; pointer-events:auto; }
.dock-item{
  display:flex; align-items:center; gap:12px; padding:10px 12px; border-radius:var(--radius);
  color:var(--paper); font-size:13.5px; white-space:nowrap;
}
.dock-item:hover{ background:rgba(239,233,220,.08); }
.dock-item svg{ width:20px; height:20px; flex:none; color:var(--copper); }
.dock-item .meta{ display:flex; flex-direction:column; overflow:hidden; }
.dock-item .meta b{ font-weight:600; font-size:12.5px; color:var(--paper); }
.dock-item .meta span{ font-size:12px; color:rgba(239,233,220,.62); overflow:hidden; text-overflow:ellipsis; }

/* ============================ RESPONSIVE ================================= */
@media (max-width:1080px){
  .strengths{ grid-template-columns:repeat(2,1fr); }
  .craft{ grid-template-columns:repeat(2,1fr); }
  .product-grid{ grid-template-columns:repeat(2,1fr); }
  .testimonials{ grid-template-columns:1fr; gap:36px; }
  .origin,.why-grid,.cta-band,.pd-grid,.contact-grid{ grid-template-columns:1fr; gap:40px; }
  .hero-grid{ grid-template-columns:1fr; min-height:0; }
  .hero-visual{ order:-1; min-height:280px; }
  .hero-copy{ padding:64px 28px 48px; }
}
@media (max-width:760px){
  .main-nav{ display:none; }
  .nav-toggle{ display:flex; align-items:center; justify-content:center; width:40px; height:40px; background:none; border:1px solid var(--line-strong); border-radius:var(--radius); }
  .nav-toggle svg{ width:20px; height:20px; }
  .header-row{ height:64px; }
  .logo{ font-size:18px; }
  .header-actions .btn-primary span{ display:none; }
  .header-actions .btn-primary{ padding:12px; }
  section{ padding:64px 0; }
  .strengths{ grid-template-columns:1fr 1fr; }
  .craft{ grid-template-columns:1fr 1fr; }
  .product-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
  .report-row{ grid-template-columns:1fr; }
  .report-row .thumb{ display:none; }
  .contact-dock{ right:10px; }
  .dock-panel{ width:220px; }
  .origin-facts li{ grid-template-columns:100px 1fr; }
  .pd-specs li{ grid-template-columns:120px 1fr; }
  .site-header.mobile-open .main-nav{
    display:flex; flex-direction:column; position:absolute; top:64px; left:0; right:0;
    background:var(--paper); border-bottom:1px solid var(--line); padding:8px 20px 20px;
  }
  .site-header.mobile-open .main-nav a{ padding:12px 0; width:100%; }
}
@media (max-width:480px){
  .footer-grid{ grid-template-columns:1fr; }
  .hero-stats div{ padding-right:16px; margin-right:16px; }
}