/* HCIC · Apple-style design system */
:root{
  --ink:#1d1d1f; --gray:#6e6e73; --bg:#ffffff; --bg-alt:#f5f5f7; --line:#d2d2d7;
  --accent:#0071e3; --accent-2:#42a5f5; --radius:18px; --pill:980px;
  --maxw:980px; --maxw-wide:1200px;
  --font:"SF Pro Display","Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --shadow:0 4px 20px rgba(0,0,0,.06); --shadow-lg:0 30px 60px rgba(0,0,0,.18);
}
*{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:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-2)}
img{max-width:100%;display:block}
.container{max-width:var(--maxw-wide);margin:0 auto;padding:0 22px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3,h4{color:var(--ink);font-weight:700;letter-spacing:-.02em;line-height:1.06}
h1{font-size:clamp(40px,6vw,72px)}
h2{font-size:clamp(30px,4.5vw,52px)}
h3{font-size:clamp(22px,2.6vw,30px);letter-spacing:-.01em}
p{margin-bottom:16px;color:var(--gray)}
.lead{font-size:clamp(17px,2vw,21px);color:var(--gray);max-width:680px;margin-left:auto;margin-right:auto}
.eyebrow{color:var(--accent);font-weight:600;font-size:14px;letter-spacing:.01em;margin-bottom:8px}
.center{text-align:center}

/* Nav */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:48px;max-width:var(--maxw-wide);margin:0 auto;padding:0 22px}
.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:19px;letter-spacing:-.02em;color:var(--ink)}
.brand img{height:26px}
.brand small{font-size:11px;font-weight:500;color:var(--gray);letter-spacing:.4px;display:block;line-height:1}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none}
.nav-links a{color:var(--ink);font-size:13px;font-weight:400;opacity:.85}
.nav-links a:hover,.nav-links a.active{opacity:1;color:var(--accent)}
.nav-cta{display:flex;align-items:center;gap:14px}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 10px;font-size:17px;cursor:pointer;color:var(--ink)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:11px 22px;border-radius:var(--pill);font-weight:400;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-2);color:#fff}
.btn-outline{border-color:var(--accent);color:var(--accent);background:transparent}
.btn-outline:hover{background:var(--accent);color:#fff}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--bg-alt)}
.link-cta{color:var(--accent);font-size:17px;font-weight:400}
.link-cta:hover{text-decoration:underline}

/* Hero */
.hero{text-align:center;padding:90px 22px 70px;background:var(--bg)}
.hero .eyebrow{font-size:15px}
.hero h1{margin:6px 0 14px}
.hero .sub{font-size:clamp(19px,2.4vw,24px);color:var(--gray);max-width:640px;margin:0 auto 24px;font-weight:400}
.hero-cta{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;align-items:center}
.hero-img{width:100%;max-width:var(--maxw-wide);margin:54px auto 0;border-radius:var(--radius);box-shadow:var(--shadow-lg);object-fit:cover;max-height:620px}

/* Sections */
.section{padding:104px 22px}
.section--alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:760px;margin:0 auto 50px}
.section-head .lead{margin-top:14px}
.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)}

/* Cards */
.card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;height:100%;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card img{width:100%;height:210px;object-fit:cover}
.card .body{padding:24px;flex:1;display:flex;flex-direction:column}
.card .tag{color:var(--accent);font-size:12px;font-weight:600;letter-spacing:.4px;text-transform:uppercase;margin-bottom:8px}
.card h3{font-size:21px;margin-bottom:8px}
.card h3 a{color:var(--ink)}
.card p{font-size:15px;margin-bottom:14px}
.card .more{margin-top:auto;color:var(--accent);font-weight:400;font-size:15px}
.feature{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;margin:0 auto 90px;max-width:var(--maxw-wide)}
.feature:last-child{margin-bottom:0}
.feature .media img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.feature h2{margin-bottom:14px}
.feature.flip .media{order:2}
.ul-check{list-style:none;display:grid;gap:11px;margin-top:8px}
.ul-check li{position:relative;padding-left:28px;color:var(--ink)}
.ul-check li::before{content:"✓";position:absolute;left:0;top:0;color:var(--accent);font-weight:800}
.kw{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.kw span{font-size:12.5px;background:var(--bg-alt);border:1px solid var(--line);color:var(--gray);padding:5px 11px;border-radius:20px}

/* Spec table */
.spec-table{width:100%;border-collapse:collapse;margin:10px 0 22px;font-size:15.5px}
.spec-table th,.spec-table td{text-align:left;padding:13px 4px;border-bottom:1px solid var(--line)}
.spec-table th{color:var(--gray);font-weight:400;width:42%}
.spec-table tr:hover td{background:#fafafa}

/* Breadcrumb */
.breadcrumb{font-size:13.5px;color:var(--gray);padding:20px 0 0;max-width:var(--maxw-wide);margin:0 auto}
.breadcrumb a{color:var(--gray)}
.breadcrumb span{margin:0 8px;color:var(--line)}

/* CTA band */
.cta-band{background:var(--bg-alt);text-align:center;padding:84px 22px}
.cta-band h2{margin-bottom:12px}
.cta-band .lead{margin-bottom:22px}

/* Forms */
.form-grid{display:grid;gap:16px;max-width:560px;margin:0 auto}
.field label{display:block;font-weight:600;margin-bottom:6px;color:var(--ink);font-size:14px}
.field input,.field select,.field textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,113,227,.15)}
.field textarea{min-height:130px;resize:vertical}
.form-note{font-size:13px;color:var(--gray)}
.form-ok{display:none;background:rgba(31,157,87,.1);border:1px solid #1f9d57;color:#15703f;padding:12px 15px;border-radius:12px;font-weight:600;margin-top:12px}

/* Article */
.article-body{max-width:720px;margin:0 auto}
.article-body p{font-size:17px;line-height:1.75;color:#333}
.article-meta{color:var(--gray);font-size:14px;margin-bottom:18px}

/* 404 */
.err404{text-align:center;padding:130px 0}
.err404 .code{font-size:104px;font-weight:800;color:var(--accent);line-height:1;letter-spacing:-.03em}

/* Footer */
.site-footer{background:var(--bg-alt);padding:54px 0 30px;font-size:13px;color:var(--gray)}
.foot-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1.2fr;gap:32px;max-width:var(--maxw-wide);margin:0 auto}
.site-footer h4{color:var(--ink);font-size:13px;margin-bottom:14px;letter-spacing:.3px}
.site-footer a{color:var(--gray);display:block;margin-bottom:9px}
.site-footer a:hover{color:var(--accent)}
.foot-brand .brand{margin-bottom:12px}
.foot-bottom{border-top:1px solid var(--line);margin-top:36px;padding-top:20px;font-size:12.5px;color:#8a8a8e;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;max-width:var(--maxw-wide);margin-left:auto;margin-right:auto}

/* Reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media(max-width:920px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .nav-links{display:none;position:absolute;top:48px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 22px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links li{padding:11px 0;border-bottom:1px solid var(--line)}
  .menu-toggle{display:block}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .feature{grid-template-columns:1fr;gap:28px;margin-bottom:60px}
  .feature.flip .media{order:0}
  .section{padding:72px 22px}
  .foot-grid{grid-template-columns:1fr}
  .hero{padding:60px 22px 44px}
}