/* ============================================================
   ZKHL Beauty — Global Skincare ODM/OEM  |  Brand: #E8394A
   Static site, Cloudflare Pages ready. EN primary / ZH secondary.
   ============================================================ */

:root{
  --brand:#E8394A;
  --brand-dark:#C52A39;
  --brand-soft:#FCE9EB;
  --ink:#16181D;
  --muted:#5B6470;
  --line:#E6E8EC;
  --bg:#FFFFFF;
  --bg-soft:#F6F7F9;
  --bg-deep:#0F1115;
  --radius:14px;
  --shadow:0 6px 24px rgba(20,24,29,.08);
  --shadow-lg:0 18px 48px rgba(20,24,29,.14);
  --maxw:1180px;
  --font:"Segoe UI",system-ui,-apple-system,Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:84px 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--bg-deep);color:#EDEFF3}
h1,h2,h3{line-height:1.2;font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(30px,5vw,52px)}
h2{font-size:clamp(24px,3.4vw,38px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:8px}
p{color:var(--muted)}
.lead{font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:640px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:12px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:2px solid transparent}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{background:#fff;transform:translateY(-1px);box-shadow:var(--shadow)}
.section--dark .btn--ghost{border-color:rgba(255,255,255,.3);color:#fff}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.02em}
.brand .mark{width:34px;height:34px}
.brand small{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-weight:600;font-size:15px;color:var(--ink);position:relative}
.nav-links a:hover{color:var(--brand)}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-toggle{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:13px;font-weight:700}
.lang-toggle button{background:#fff;border:0;padding:7px 12px;cursor:pointer;color:var(--muted)}
.lang-toggle button.active{background:var(--brand);color:#fff}
.burger{display:none;background:none;border:0;font-size:26px;cursor:pointer}

/* ---------- Hero ---------- */
.hero{position:relative;padding:96px 0 84px;background:radial-gradient(1200px 500px at 80% -10%,var(--brand-soft),transparent 60%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero h1{margin-bottom:18px}
.hero .lead{margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow-lg)}
.hero-card .qr{aspect-ratio:1/1;background:repeating-conic-gradient(#16181D 0 25%,#fff 0 50%) 50%/22px 22px;border-radius:12px;margin-bottom:14px}
.hero-card h4{font-size:16px;margin-bottom:4px}
.hero-card p{font-size:14px}

/* ---------- Trust strip ---------- */
.trust{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:54px}
.trust .item{text-align:center;padding:18px 10px;background:var(--bg-soft);border-radius:14px}
.trust .num{font-size:30px;font-weight:800;color:var(--brand)}
.trust .lbl{font-size:13px;color:var(--muted);font-weight:600}

/* ---------- Feature grid ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .ic{width:48px;height:48px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;font-weight:800}
.card h3{font-size:18px}
.card p{font-size:14.5px}

/* ---------- Process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:step}
.step{background:var(--bg-soft);border-radius:14px;padding:22px 18px;position:relative}
.step .n{counter-increment:step;font-size:13px;font-weight:800;color:var(--brand)}
.step .n::before{content:"0" counter(step)}
.step h4{font-size:16px;margin:8px 0 6px}
.step p{font-size:13.5px}

/* ---------- Product cards ---------- */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.product{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s}
.product:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.product .thumb{aspect-ratio:4/3;background:linear-gradient(135deg,var(--brand-soft),#fff)}
.product .thumb .ph{height:100%;display:flex;align-items:center;justify-content:center;color:var(--brand);font-weight:800;font-size:15px;letter-spacing:.04em}
.product .body{padding:20px}
.product .body h3{font-size:17px}
.product .body p{font-size:14px}
.product .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);background:var(--brand-soft);padding:4px 10px;border-radius:999px;margin-bottom:10px}

/* ---------- CTA band ---------- */
.cta-band{background:var(--brand);color:#fff;border-radius:22px;padding:54px 48px;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.9);max-width:560px;margin:0 auto 24px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.form{display:grid;gap:16px}
.form label{font-size:13px;font-weight:700;color:var(--ink)}
.form input,.form select,.form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-family:inherit;font-size:15px;background:#fff}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--brand)}
.form textarea{resize:vertical;min-height:120px}
.channels{display:grid;gap:14px}
.channel{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:#fff}
.channel .ic{width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px}
.channel h4{font-size:15px}
.channel p{font-size:13.5px}

/* ---------- Footer ---------- */
.footer{background:var(--bg-deep);color:#C9CED6;padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{color:#C9CED6;font-size:14px;display:block;margin-bottom:8px}
.footer a:hover{color:#fff}
.footer .brand{color:#fff;margin-bottom:12px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:13px;color:#8A929E;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- Language switching ---------- */
html:not(.zh) .lang-zh{display:none}
html.zh .lang-en{display:none}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .trust{grid-template-columns:repeat(2,1fr)}
  .grid-3,.products{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links{display:none}
  .burger{display:block}
  .section{padding:56px 0}
  .grid-3,.products,.steps,.trust{grid-template-columns:1fr}
  .cta-band{padding:40px 22px}
  .footer-grid{grid-template-columns:1fr}
}