/* Kuoheng Textile — static B2B site. Mobile-first. */
:root{
  --navy:#0e2a3f;
  --navy-2:#143a55;
  --ink:#1d2b36;
  --muted:#5b6b78;
  --line:#e3e9ee;
  --bg:#ffffff;
  --bg-soft:#f4f7f9;
  --accent:#d98a1f;
  --accent-dark:#b56f14;
  --wa:#1faa53;
  --radius:10px;
  --max:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy-2)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
section.block{padding:56px 0}
section.block.alt{background:var(--bg-soft)}
h1,h2,h3{line-height:1.35;color:var(--navy);margin-bottom:14px}
h1{font-size:clamp(28px,5vw,44px);letter-spacing:.2px}
h2{font-size:clamp(22px,3.4vw,30px)}
h3{font-size:19px}
p{margin-bottom:14px}
.lede{font-size:18px;color:var(--muted);max-width:760px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent-dark);margin-bottom:10px}
ul,ol{margin:0 0 14px 20px}
li{margin-bottom:8px}
table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:15px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--bg-soft);color:var(--navy)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{text-decoration:none;color:var(--navy);font-weight:800;font-size:18px;letter-spacing:1px;line-height:1.2}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:2px}
.main-nav{display:none}
.nav-toggle{background:none;border:1px solid var(--line);border-radius:8px;font-size:20px;padding:6px 12px;cursor:pointer;color:var(--navy)}
.mobile-menu{display:none;border-top:1px solid var(--line);background:#fff;padding:10px 20px 18px}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:10px 4px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line);font-weight:600}
.mobile-menu a.sub{padding-left:22px;font-weight:400;color:var(--muted)}
.lang-switch{font-weight:700;text-decoration:none;border:1px solid var(--line);border-radius:20px;padding:6px 14px;font-size:14px;color:var(--navy)}
.btn{display:inline-block;background:var(--accent);color:#fff!important;text-decoration:none;font-weight:700;
  padding:13px 26px;border-radius:var(--radius);border:none;cursor:pointer;font-size:16px;transition:background .15s}
.btn:hover{background:var(--accent-dark)}
.btn.ghost{background:transparent;color:var(--navy)!important;border:2px solid var(--navy)}
.btn.wa{background:var(--wa)}
.btn.wa:hover{background:#178a43}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
@media(min-width:900px){
  .nav-toggle{display:none}
  .main-nav{display:flex;align-items:center;gap:4px}
  .main-nav a,.main-nav .drop>span{padding:10px 12px;text-decoration:none;color:var(--ink);font-weight:600;font-size:15px;border-radius:8px;cursor:pointer}
  .main-nav a:hover,.main-nav .drop>span:hover{background:var(--bg-soft)}
  .main-nav .drop{position:relative}
  .main-nav .dropdown{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:10px;
    min-width:250px;box-shadow:0 12px 32px rgba(14,42,63,.12);padding:8px;display:none}
  .main-nav .drop:hover .dropdown{display:block}
  .main-nav .dropdown a{display:block;padding:10px 12px;font-weight:500}
  .main-nav .cta{margin-left:8px}
  .header-cta{display:flex;align-items:center;gap:10px}
}
@media(max-width:899px){.header-cta .btn{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--navy)}
.hero img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45}
.hero-in{position:relative;padding:84px 20px;max-width:var(--max);margin:0 auto}
.hero h1{color:#fff;max-width:720px}
.hero p.sub{font-size:18px;max-width:680px;color:#e8eef3;margin-bottom:8px}
.hero .btn-row .btn.ghost{color:#fff!important;border-color:#fff}
.page-hero{background:var(--navy);color:#fff;padding:52px 0}
.page-hero h1{color:#fff;margin-bottom:8px}
.page-hero p{color:#cfd9e2;max-width:760px;margin-bottom:0}
.crumbs{font-size:13px;color:#9fb0bd;margin-bottom:12px}
.crumbs a{color:#cfd9e2}

/* ---------- cards & grids ---------- */
.grid{display:grid;gap:20px;margin-top:26px}
@media(min-width:700px){.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:1fr 1fr 1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.card .pad{padding:22px}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
.card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.card .go{margin-top:auto;padding:0 22px 22px}
.text-link{font-weight:700;color:var(--accent-dark);text-decoration:none}
.text-link:hover{text-decoration:underline}

/* ---------- steps ---------- */
.steps{display:grid;gap:14px;margin-top:26px;counter-reset:step}
@media(min-width:700px){.steps{grid-template-columns:repeat(5,1fr)}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 16px;position:relative}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);display:block;
  font-size:13px;font-weight:800;color:var(--accent-dark);letter-spacing:1px;margin-bottom:8px}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted);margin:0}

/* ---------- stats strip ---------- */
.stats{background:var(--navy);color:#fff}
.stats .wrap{display:grid;gap:18px;padding:30px 20px;text-align:center}
@media(min-width:700px){.stats .wrap{grid-template-columns:repeat(3,1fr)}}
.stats b{display:block;font-size:26px;color:#fff}
.stats span{font-size:14px;color:#b9c7d2}

/* ---------- faq ---------- */
details.faq{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;background:#fff;overflow:hidden}
details.faq summary{padding:16px 20px;font-weight:700;color:var(--navy);cursor:pointer;list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";float:right;color:var(--accent-dark);font-size:20px}
details.faq[open] summary::after{content:"–"}
details.faq .a{padding:0 20px 18px;color:var(--muted)}

/* ---------- gallery ---------- */
.gallery{display:grid;gap:12px;margin:24px 0}
@media(min-width:700px){.gallery{grid-template-columns:1fr 1fr}}
.gallery figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.gallery img{aspect-ratio:3/2;object-fit:cover;width:100%}
.spec-grid{display:grid;gap:16px;margin-top:8px}
@media(min-width:700px){.spec-grid{grid-template-columns:1fr 1fr}}
.spec{background:var(--bg-soft);border-radius:var(--radius);padding:20px}
.spec h3{font-size:16px;margin-bottom:8px}
.spec p,.spec li{font-size:15px;color:var(--muted)}

/* ---------- forms ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;max-width:760px;margin:26px auto 0}
.field{margin-bottom:16px}
.field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px;color:var(--navy)}
.field label .req{color:#c0392b}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:8px;
  padding:12px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink)}
.field textarea{min-height:120px;resize:vertical}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px}
.radio-row{display:flex;gap:12px;flex-wrap:wrap}
.radio-row label{border:1px solid var(--line);border-radius:8px;padding:12px 16px;font-weight:500;cursor:pointer;display:flex;gap:8px;align-items:flex-start;font-size:15px}
.radio-row input{width:auto;margin-top:4px}
.form-note{font-size:14px;color:var(--muted);margin-top:14px}
.form-ok{background:#e9f7ef;border:1px solid #bfe6cd;color:#14663a;border-radius:10px;padding:18px;margin-top:18px;display:none}
.form-fallback{background:#fff8ec;border:1px dashed var(--accent);border-radius:10px;padding:20px;margin-top:18px}

/* ---------- contact ---------- */
.contact-big{display:grid;gap:16px;margin-top:26px}
@media(min-width:700px){.contact-big{grid-template-columns:1fr 1fr}}
.contact-card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center;background:#fff}
.contact-card h3{margin-bottom:6px}
.contact-card .val{font-size:19px;font-weight:800;color:var(--navy);word-break:break-all;margin:10px 0 16px}
.placeholder{color:#a33;font-family:ui-monospace,monospace;font-size:15px}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#b9c7d2;margin-top:0}
.footer-grid{display:grid;gap:28px;padding:48px 20px;max-width:var(--max);margin:0 auto}
@media(min-width:700px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px;letter-spacing:.5px}
.site-footer a{color:#b9c7d2;text-decoration:none;font-size:14px}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;margin:0}
.site-footer li{margin-bottom:8px}
.footer-brand{font-weight:800;color:#fff;font-size:18px;letter-spacing:1px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 20px;text-align:center;font-size:13px;color:#8fa1ae;max-width:var(--max);margin:0 auto}
.prose{max-width:820px}
.prose figure{margin:22px 0}
.prose figure img{border-radius:var(--radius);border:1px solid var(--line)}
.two-col{display:grid;gap:28px;align-items:start}
@media(min-width:860px){.two-col{grid-template-columns:1.1fr .9fr}}
.check li{list-style:none;position:relative;padding-left:28px}
.check li::before{content:"✓";position:absolute;left:0;color:var(--wa);font-weight:800}

/* ---------- floating WhatsApp button (mobile-first) ---------- */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:60;width:60px;height:60px;border-radius:50%;
  background:var(--wa);display:flex;align-items:center;justify-content:center;font-size:28px;text-decoration:none;
  box-shadow:0 6px 20px rgba(0,0,0,.28);transition:transform .15s}
.wa-float:hover{background:#178a43;transform:scale(1.06)}