/* =========================================================
   Welong — Instant Boba Pearls Manufacturer
   Design system / global stylesheet
   ========================================================= */

:root{
  /* Brand palette — brown-sugar boba */
  --ink:#2A1A10;
  --brown:#5A3418;
  --brown-d:#3A2010;
  --caramel:#C97B2D;
  --caramel-l:#E9A852;
  --cream:#FFFCF7;
  --paper:#FFFFFF;
  --line:#EFE2D2;
  --muted:#8A7462;
  --green:#3E7C4F;

  --radius:14px;
  --radius-sm:10px;
  --shadow:0 2px 6px rgba(42,26,16,.06),0 12px 32px rgba(42,26,16,.07);
  --shadow-lg:0 8px 24px rgba(42,26,16,.12),0 24px 64px rgba(42,26,16,.10);

  --container:1180px;
  --gutter:22px;

  --font-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang SC","Microsoft YaHei",sans-serif;
  --font-display:"Playfair Display",Georgia,"Times New Roman",serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--cream);
  font-size:16.5px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--caramel);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:800;letter-spacing:-.015em}
h1{font-size:clamp(2.1rem,4.4vw,3.4rem)}
h2{font-size:clamp(1.6rem,2.9vw,2.3rem)}
h3{font-size:1.22rem}
p{margin:0 0 1em}
ul{margin:0 0 1em;padding-left:1.15em}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(52px,7vw,96px) 0}
.section--tight{padding:clamp(36px,5vw,60px) 0}
.section--alt{background:var(--paper);border-block:1px solid var(--line)}
.center{text-align:center}

.eyebrow{
  display:inline-block;font-size:.76rem;font-weight:800;letter-spacing:.16em;
  text-transform:uppercase;color:var(--caramel);margin-bottom:.8em;
}
.lead{font-size:1.1rem;color:var(--muted);max-width:62ch}
.section-head{max-width:70ch;margin-bottom:clamp(26px,4vw,46px)}
.section-head.center{margin-inline:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55em;justify-content:center;
  padding:.86em 1.6em;border-radius:999px;font-weight:700;font-size:.95rem;
  border:2px solid transparent;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease;
  text-decoration:none;line-height:1.15;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn--primary{background:var(--caramel);color:#fff;box-shadow:0 6px 18px rgba(201,123,45,.32)}
.btn--primary:hover{background:var(--brown-d)}
.btn--ghost{border-color:var(--line);color:var(--brown);background:rgba(255,255,255,.7)}
.btn--ghost:hover{border-color:var(--caramel)}
.btn--light{background:#fff;color:var(--brown)}
.btn--lg{padding:1.05em 2.1em;font-size:1.02rem}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,252,247,.88);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:26px;min-height:70px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.2rem;color:var(--brown-d);letter-spacing:-.02em;text-decoration:none}
.brand:hover{text-decoration:none}
.brand svg{display:block}
.brand small{display:block;font-size:.63rem;font-weight:600;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;margin-top:-2px}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  padding:.55em .85em;border-radius:8px;font-size:.93rem;font-weight:600;
  color:var(--brown);text-decoration:none;transition:background .15s;
}
.nav a:hover,.nav a[aria-current=page]{background:rgba(201,123,45,.11);color:var(--brown-d)}
.nav-cta{margin-left:10px}
.lang{font-size:.82rem;color:var(--muted);margin-left:6px}
.lang a{color:var(--muted);padding:.2em .3em}
.lang a:hover{color:var(--caramel)}

.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:9px;padding:.45em .7em;font-size:1.1rem;cursor:pointer;color:var(--brown)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--brown-d);color:#fff}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(30,16,6,.92) 8%,rgba(30,16,6,.68) 42%,rgba(30,16,6,.18) 78%);
}
.hero-media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.85}
.hero-inner{position:relative;z-index:2;padding:clamp(64px,10vw,132px) 0;max-width:720px}
.hero h1{color:#fff;margin-bottom:.4em}
.hero .lead{color:rgba(255,246,235,.9);font-size:1.16rem}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:1.6em}

.trustbar{
  position:relative;z-index:2;background:rgba(255,255,255,.06);
  border-top:1px solid rgba(255,255,255,.14);
}
.trustbar ul{
  list-style:none;margin:0;padding:.9em 0;display:flex;flex-wrap:wrap;gap:.4em 2.2em;justify-content:center;
}
.trustbar li{font-size:.85rem;font-weight:700;letter-spacing:.05em;color:#F7E7CE;display:flex;align-items:center;gap:.45em}
.trustbar li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--caramel-l)}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 20px;text-align:center;box-shadow:var(--shadow);
}
.stat b{display:block;font-size:2.1rem;color:var(--caramel);font-family:var(--font-display);line-height:1}
.stat span{font-size:.85rem;color:var(--muted);font-weight:600}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card__media{aspect-ratio:4/3;overflow:hidden;background:#F5EDE2}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card__media img{transform:scale(1.045)}
.card__body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:.5em;flex:1}
.card__body p{color:var(--muted);font-size:.95rem;margin:0}
.card__link{margin-top:auto;font-weight:700;font-size:.9rem;color:var(--caramel)}

.feature{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
}
.feature__icon{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:rgba(201,123,45,.13);color:var(--caramel);font-size:1.3rem;margin-bottom:14px;
}
.feature h3{font-size:1.05rem}
.feature p{font-size:.93rem;color:var(--muted);margin:0}

/* ---------- Split (text + image) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:center}
.split__media img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%}
.split--rev .split__media{order:2}
.ticklist{list-style:none;padding:0;margin:1.2em 0 0}
.ticklist li{display:flex;gap:.7em;padding:.42em 0;font-weight:600;color:var(--brown)}
.ticklist li::before{content:"✓";color:var(--caramel);font-weight:900}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
table.spec{width:100%;border-collapse:collapse;font-size:.94rem;min-width:460px}
table.spec th,table.spec td{padding:.85em 1.1em;text-align:left;border-bottom:1px solid var(--line)}
table.spec th{background:#FAF3E9;width:34%;font-weight:700;color:var(--brown-d)}
table.spec tr:last-child td,table.spec tr:last-child th{border-bottom:0}

/* ---------- Breadcrumb ---------- */
.crumbs{font-size:.85rem;color:var(--muted);padding:18px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4em;margin:0;padding:0}
.crumbs li+li::before{content:"/";margin-right:.4em;color:var(--line)}
.crumbs a{color:var(--muted)}

/* ---------- Page hero (inner pages) ---------- */
.pagehero{background:linear-gradient(115deg,var(--brown-d),var(--brown) 60%,#7A4A22);color:#fff;padding:clamp(44px,6vw,74px) 0}
.pagehero h1{color:#fff;margin-bottom:.25em}
.pagehero p{color:rgba(255,243,229,.86);max-width:66ch;margin:0;font-size:1.06rem}

/* ---------- Accordion (FAQ) ---------- */
.acc{border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);overflow:hidden}
.acc details{border-bottom:1px solid var(--line)}
.acc details:last-child{border-bottom:0}
.acc summary{
  padding:18px 22px;cursor:pointer;font-weight:700;list-style:none;
  display:flex;justify-content:space-between;gap:1em;align-items:center;color:var(--brown-d);
}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";font-size:1.4rem;color:var(--caramel);line-height:1;transition:transform .2s}
.acc details[open] summary::after{transform:rotate(45deg)}
.acc .acc__body{padding:0 22px 20px;color:var(--muted);max-width:78ch}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(115deg,var(--brown-d),var(--brown));
  color:#fff;border-radius:var(--radius);padding:clamp(30px,5vw,54px);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;margin-bottom:.15em;font-size:clamp(1.4rem,2.6vw,2rem)}
.cta-band p{margin:0;color:rgba(255,240,224,.85)}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:.4em}
.field--full{grid-column:1/-1}
.field label{font-size:.86rem;font-weight:700;color:var(--brown-d)}
.field input,.field select,.field textarea{
  font:inherit;padding:.8em .95em;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);
  transition:border-color .15s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--caramel);box-shadow:0 0 0 3px rgba(201,123,45,.14)}
.field textarea{min-height:130px;resize:vertical}
.form-note{font-size:.82rem;color:var(--muted)}

/* ---------- Footer ---------- */
.site-footer{background:var(--brown-d);color:#EFE0CE;margin-top:clamp(40px,6vw,80px);padding:clamp(40px,6vw,64px) 0 0;font-size:.94rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
.site-footer h4{color:#fff;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1em}
.site-footer a{color:#E8D4BB}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.5em}
.site-footer .brand{color:#fff}
.footer-bottom{
  margin-top:38px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.83rem;color:#B79C7F;
}

/* ---------- Misc ---------- */
.pill{
  display:inline-block;padding:.34em .9em;border-radius:999px;font-size:.76rem;font-weight:800;
  background:rgba(201,123,45,.13);color:var(--brown);letter-spacing:.03em;
}
.pill--green{background:rgba(62,124,79,.13);color:var(--green)}
.note{
  background:#FFF7E8;border:1px solid #F2DDB5;border-radius:var(--radius-sm);
  padding:16px 18px;font-size:.92rem;color:#6B4A17;
}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.gallery img{border-radius:var(--radius-sm);box-shadow:var(--shadow);width:100%}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.cert-card img{border-radius:6px;aspect-ratio:1/1.35;object-fit:cover;width:100%}
.cert-card figcaption{font-size:.82rem;text-align:center;color:var(--muted);padding-top:10px;font-weight:600}

.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:10px 16px;border-radius:8px;z-index:99}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav{
    position:fixed;inset:70px 0 auto 0;background:var(--cream);flex-direction:column;
    align-items:stretch;padding:14px 20px 26px;gap:2px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-lg);display:none;
  }
  .nav.is-open{display:flex}
  .nav a{padding:.8em .6em;font-size:1rem}
  .nav-cta{margin:10px 0 0}
  .nav-toggle{display:block}
  .grid-2,.grid-3,.grid-4,.split,.duo,.form-grid{grid-template-columns:1fr}
  .split--rev .split__media{order:0}
  .footer-grid{grid-template-columns:1fr}
  .hero-inner{max-width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}
@media print{
  .site-header,.site-footer,.cta-band,.nav{display:none}
  body{background:#fff}
}