/* JIAJIA site — tokens mirror DESIGN.md. One stylesheet, no framework. */
:root{
  --primary:#0F172A; --secondary:#334155; --accent:#0369A1; --accent-h:#075985;
  --bg:#F8FAFC; --surface:#fff; --fg:#020617; --muted:#64748B; --border:#E2E8F0;
  --radius:8px; --wrap:1160px;
  --ease:cubic-bezier(.23,1,.32,1); /* emil strong ease-out */
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Plus Jakarta Sans",system-ui,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
h1{font-size:clamp(2rem,4.2vw,3.2rem);font-weight:800;line-height:1.12;letter-spacing:-.02em;color:var(--primary)}
h2{font-size:clamp(1.4rem,2.6vw,2rem);font-weight:800;line-height:1.2;letter-spacing:-.01em;color:var(--primary)}
h3{font-size:1.12rem;font-weight:700;color:var(--primary)}
.sec-h{margin:0 0 26px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--primary);font-size:1.12rem}
.logo-mark{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:6px;background:var(--primary);color:#fff;font-weight:800}
.logo-sub{font-weight:600;color:var(--muted);font-size:.82rem;margin-left:2px}
.nav-links{display:flex;align-items:center;gap:22px;font-size:.93rem;font-weight:600}
.nav-links a{color:var(--secondary)}
.nav-links a:hover{color:var(--accent)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--primary);transition:transform .2s var(--ease),opacity .2s}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;padding:11px 22px;border-radius:var(--radius);border:0;cursor:pointer;font-size:.95rem;transition:background .18s var(--ease),transform .12s var(--ease)}
.btn:hover{background:var(--accent-h)}
.btn:active{transform:scale(.97)}
.btn-sm{padding:7px 14px;font-size:.85rem}
.btn-lg{padding:14px 28px;font-size:1.02rem}
.btn-ghost{background:transparent;color:var(--primary);border:1.5px solid var(--border)}
.btn-ghost:hover{background:var(--surface);border-color:var(--secondary)}

/* hero */
.hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:64px;padding-bottom:64px}
.hero .sub{font-size:1.08rem;color:var(--muted);margin:18px 0 26px;max-width:34rem}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-fig img{border-radius:12px;box-shadow:0 24px 60px -24px rgba(15,23,42,.35)}

/* stats */
.stats{background:var(--primary)}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:36px;padding-bottom:36px}
.stat b{display:block;color:#fff;font-size:1.9rem;font-weight:800;letter-spacing:-.01em}
.stat span{color:#94A3B8;font-size:.86rem}

/* sections */
.section{padding:64px 0}
.section.alt{background:#EEF2F7}
.band-dark{background:var(--primary);color:#CBD5E1}
.band-dark h2{color:#fff}
.band-dark .ticks li{color:#CBD5E1}
.band-dark .ticks li::before{color:#38BDF8}
.page-head{background:#fff;border-bottom:1px solid var(--border);padding:56px 0}
.page-head .sub{color:var(--muted);font-size:1.06rem;max-width:44rem;margin:14px 0 22px}

/* product tiles: asymmetric grid (variance 5) */
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.prod-tile{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:grid;grid-template-rows:auto auto;color:inherit;transition:box-shadow .22s var(--ease),transform .22s var(--ease)}
.prod-tile:hover{box-shadow:0 18px 40px -18px rgba(15,23,42,.25)}
@media (hover:hover) and (pointer:fine){.prod-tile:hover{transform:translateY(-3px)}}
.prod-tile img{width:100%;object-fit:cover;aspect-ratio:16/9}
.tile-big{grid-column:1/-1;grid-template-columns:1.15fr .85fr;grid-template-rows:auto}
.tile-big img{aspect-ratio:auto;height:100%}
.tile-wide{grid-column:1/-1;grid-template-columns:1.15fr .85fr}
.tile-wide img{aspect-ratio:auto;height:100%}
.tile-txt{padding:24px}
.tile-txt p{color:var(--muted);margin:8px 0 14px;font-size:.95rem}
.tile-link{font-weight:700;color:var(--accent);font-size:.9rem}
.tile-link::after{content:" →"}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-txt h2{margin-bottom:14px}
.split-txt p{color:var(--secondary);margin-bottom:14px}
.figure-wide{margin-top:30px}
.figure-wide figcaption,.figcap{color:var(--muted);font-size:.86rem;margin-top:10px}

/* ticks */
.ticks{list-style:none;margin:10px 0 18px;display:grid;gap:9px}
.ticks li{padding-left:26px;position:relative;color:var(--secondary)}
.ticks li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}

/* spec chunks */
.spec-chunks{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.chunk{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.chunk h3{margin-bottom:12px;font-size:1rem}
.chunk dl div{padding:9px 0;border-bottom:1px dashed var(--border)}
.chunk dl div:last-child{border-bottom:0}
.chunk dt{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:700}
.chunk dd{font-size:.94rem;color:var(--secondary)}

/* spec table */
.spec-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:.94rem}
.spec th,.spec td{padding:11px 16px;text-align:left;border-bottom:1px solid var(--border)}
.spec th{background:var(--primary);color:#fff;font-weight:700}
.spec tr:nth-child(even){background:#F8FAFC}

/* tonnage */
.ton-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:34px}
.ton{background:#fff;border:1px solid var(--border);border-radius:12px;padding:26px;color:inherit;transition:border-color .18s var(--ease),transform .18s var(--ease)}
.ton:hover{border-color:var(--accent)}
@media (hover:hover) and (pointer:fine){.ton:hover{transform:translateY(-3px)}}
.ton b{display:block;font-size:2rem;color:var(--accent);font-weight:800}
.ton span{color:var(--muted);font-size:.9rem}

/* apps chips */
.apps{display:flex;flex-wrap:wrap;gap:10px}
.apps span{background:#fff;border:1px solid var(--border);border-radius:999px;padding:7px 16px;font-size:.88rem;color:var(--secondary)}
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.chip{border:1.5px solid var(--border);border-radius:999px;padding:8px 18px;font-weight:700;color:var(--primary);background:#fff;transition:border-color .15s var(--ease)}
.chip:hover{border-color:var(--accent);color:var(--accent)}

/* arch steps */
.arch{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.arch-step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;border-top:3px solid var(--accent)}
.arch-step b{display:block;margin-bottom:8px;color:var(--primary)}
.arch-step span{font-size:.9rem;color:var(--muted)}

/* cta band */
.cta-band{background:var(--primary)}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#fff}
.cta-band p{color:#94A3B8;max-width:36rem;margin-top:6px}

/* forms */
.form{background:#fff;border:1px solid var(--border);border-radius:12px;padding:28px;display:grid;gap:16px}
.form label{display:grid;gap:6px;font-weight:700;font-size:.88rem;color:var(--primary)}
.form input,.form select,.form textarea{border:1px solid var(--border);border-radius:var(--radius);padding:11px 12px;font:inherit;font-weight:400;color:var(--fg);background:var(--bg)}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.form-note{font-size:.9rem;color:var(--muted)}
.contact-side h2{margin-bottom:16px}
.cline{display:grid;gap:2px;margin-bottom:14px}
.cline b{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.trust-box{margin-top:22px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:grid;gap:6px;font-size:.92rem;color:var(--secondary)}
.trust-box b{color:var(--primary)}
.fineprint{font-size:.86rem;color:var(--muted);margin-top:18px}

/* footer */
.footer{background:var(--primary);color:#94A3B8;padding:56px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.foot-brand{color:#fff;font-weight:800;display:flex;gap:8px;align-items:center;margin-bottom:12px}
.footer h4{color:#fff;font-size:.9rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.05em}
.footer a{color:#CBD5E1;display:block;margin-bottom:8px;font-size:.92rem}
.footer a:hover{color:#fff}
.footer p{font-size:.9rem;margin-bottom:10px}
.foot-addr{font-size:.84rem}
.foot-base{display:flex;justify-content:space-between;border-top:1px solid #1E293B;padding:18px 0;font-size:.84rem}

/* motion (MOTION_INTENSITY 4, gated on html.js) */
html.js .reveal{opacity:0;transform:translateY(18px)}
html.js .reveal.in{opacity:1;transform:none;transition:opacity .55s var(--ease),transform .55s var(--ease)}
@media (prefers-reduced-motion:reduce){
  html.js .reveal,html.js .reveal.in{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .btn:active{transform:none}
}

/* responsive */
@media (max-width:960px){
  .hero-in,.split,.tile-big,.tile-wide{grid-template-columns:1fr}
  .spec-chunks,.arch,.ton-grid{grid-template-columns:1fr}
  .stats-in{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{position:fixed;inset:64px 0 auto 0;background:#fff;flex-direction:column;padding:22px;border-bottom:1px solid var(--border);display:none;gap:16px;align-items:flex-start}
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .cta-in{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .stats-in{grid-template-columns:1fr 1fr;gap:18px}
  .foot-grid{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
}


/* ===== BLOG MODULE (appended 2026-11-05) ===== */
.breadcrumb{font-size:.86rem;color:var(--muted);margin-bottom:22px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{margin:0 8px;color:var(--border)}

/* hub */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.blog-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;color:inherit;transition:box-shadow .22s var(--ease),transform .22s var(--ease)}
.blog-card:hover{box-shadow:0 18px 40px -18px rgba(15,23,42,.25)}
@media (hover:hover) and (pointer:fine){.blog-card:hover{transform:translateY(-3px)}}
.blog-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.blog-card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.blog-meta{font-size:.8rem;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}
.blog-card h2{font-size:1.16rem;line-height:1.3;margin:2px 0 0}
.blog-card p{color:var(--muted);font-size:.94rem;flex:1}
.blog-read{font-weight:700;color:var(--accent);font-size:.9rem}
.blog-read::after{content:" →"}

/* article */
.article-wrap{max-width:760px;margin:0 auto;padding:0 24px 64px}
.article-head{padding:56px 0 8px}
.article-head h1{font-size:clamp(1.9rem,3.6vw,2.7rem)}
.article-lede{font-size:1.12rem;color:var(--secondary);margin:18px 0 22px;line-height:1.7}
.article-meta{font-size:.86rem;color:var(--muted);border-bottom:1px solid var(--border);padding-bottom:20px;margin-bottom:26px}
.prose h2{font-size:1.5rem;margin:40px 0 14px;scroll-margin-top:80px}
.prose p{color:var(--secondary);margin:0 0 18px;line-height:1.8}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px;color:var(--secondary)}
.prose li{margin-bottom:9px;line-height:1.75}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.prose strong{color:var(--primary)}
.article-figure{margin:0 0 30px}
.article-figure img{border-radius:12px;width:100%}
.article-figure figcaption{color:var(--muted);font-size:.85rem;margin-top:10px}
.article-tags{display:flex;gap:10px;flex-wrap:wrap;margin:34px 0 0}
.article-tags span{background:#fff;border:1px solid var(--border);border-radius:999px;padding:6px 14px;font-size:.82rem;color:var(--secondary)}

@media (max-width:960px){.blog-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.blog-grid{grid-template-columns:1fr}}