/* =========================================================
   YUNSHU3D — Industrial / Minimal / Modern Design System
   Tokens based on the Yunshu UI Design Spec v1
   Navy #0A1B2E · Blue #2563FF · Gold #DCA826 · Ice #F5F9FF
   ========================================================= */

:root{
  /* Brand palette */
  --navy:#0A1B2E;
  --navy-2:#12294A;
  --blue:#2563FF;
  --blue-d:#1C4FD6;
  --gold:#DCA826;
  --ink:#1A2330;
  --ink-2:#43536B;
  --line:#E2E8F2;
  --bg:#F5F9FF;
  --bg-2:#FFFFFF;
  --ice:#EAF1FF;
  --ice-2:#F5F9FF;

  /* Typography */
  --font-display:'Space Grotesk','Segoe UI',system-ui,sans-serif;
  --font-body:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;

  /* Spacing scale */
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:40px; --sp-5:64px; --sp-6:96px;
  --radius:10px; --radius-lg:16px; --radius-sm:8px;
  --shadow-sm:0 2px 10px rgba(16,40,80,.06);
  --shadow:0 8px 30px rgba(16,40,80,.10);
  --shadow-lg:0 20px 60px rgba(10,27,46,.18);
  --maxw:1240px;
  --header-h:72px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:1.125rem;          /* 18px — globally enlarged base size */
  line-height:1.75;
  color:var(--ink);
  background:#fff;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--blue);text-decoration:none;}
a:hover{color:var(--blue-d);}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.12;margin:0;letter-spacing:-.02em;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.container--narrow{max-width:920px;}
.section{padding:var(--sp-6) 0;}
.section--tight{padding:var(--sp-5) 0;}
.section--alt{background:var(--bg);}
.section--dark{background:var(--navy);color:#EAF1FF;}
.section--dark h1,.section--dark h2,.section--dark h3{color:#fff;}
.section--dark p{color:rgba(234,241,255,.78);}
.divider-top{border-top:1px solid var(--line);}

/* ---------- Section header ---------- */
.eyebrow{
  display:inline-block;
  font-family:var(--font-display);
  font-size:.8rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue);margin-bottom:14px;
}
.eyebrow--gold{color:var(--gold);}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center;}
.section-head--left{margin-left:0;text-align:left;}
.section-head h2{font-size:clamp(1.9rem,3.4vw,2.7rem);margin-bottom:16px;}
.section-head p{color:var(--ink-2);font-size:1.15rem;}
.section--dark .section-head p{color:rgba(234,241,255,.72);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:600;font-size:1rem;
  padding:14px 26px;border-radius:var(--radius);border:2px solid transparent;
  cursor:pointer;transition:.2s ease;line-height:1;white-space:nowrap;
}
.btn svg{width:18px;height:18px;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-d);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(37,99,255,.35);}
.btn-outline{background:transparent;color:var(--blue);border-color:var(--blue);}
.btn-outline:hover{background:var(--blue);color:#fff;}
.btn-light{background:#fff;color:var(--navy);}
.btn-light:hover{background:var(--ice);transform:translateY(-2px);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn-block{width:100%;justify-content:center;}
.btn-sm{padding:10px 18px;font-size:.92rem;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--navy);letter-spacing:.02em;}
.brand .logo-mark{
  width:38px;height:38px;border-radius:9px;flex:none;
  background:var(--navy);color:#fff;display:grid;place-items:center;
  font-size:1.05rem;font-weight:700;position:relative;overflow:hidden;
}
.brand .logo-mark::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(37,99,255,.9),rgba(220,168,38,.35));mix-blend-mode:screen;}
.brand small{display:block;font-size:.62rem;letter-spacing:.32em;color:var(--ink-2);font-weight:600;font-family:var(--font-body);}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-item{position:relative;}
.nav-link{
  display:flex;align-items:center;gap:6px;
  padding:10px 14px;border-radius:8px;color:var(--ink);font-weight:500;font-size:1rem;
  font-family:var(--font-body);transition:.15s;
}
.nav-link:hover{background:var(--ice);color:var(--navy);}
.nav-link.active{color:var(--blue);}
.nav-item.has-mega:hover .mega{opacity:1;visibility:visible;transform:translateY(0);}
.caret{width:14px;height:14px;transition:.2s;}
.nav-item.has-mega:hover .caret{transform:rotate(180deg);}
.mega{
  position:absolute;top:100%;left:50%;transform:translate(-50%,10px);
  width:min(720px,92vw);background:#fff;border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow-lg);padding:18px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:6px;
  opacity:0;visibility:hidden;transition:.2s;z-index:50;
}
.mega a{display:block;padding:12px 14px;border-radius:10px;color:var(--ink);}
.mega a:hover{background:var(--ice);}
.mega a b{display:block;font-family:var(--font-display);font-size:1rem;color:var(--navy);}
.mega a span{font-size:.85rem;color:var(--ink-2);}
.nav-cta{margin-left:8px;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px;}
.nav-toggle span{width:24px;height:2px;background:var(--navy);display:block;transition:.2s;}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden;}
.hero::before{ /* blueprint grid */
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,255,.10) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(37,99,255,.10) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%);
}
.hero::after{ /* glow */
  content:"";position:absolute;width:620px;height:620px;right:-160px;top:-200px;
  background:radial-gradient(circle,rgba(37,99,255,.35),transparent 60%);filter:blur(20px);
}
.hero .container{position:relative;z-index:2;padding-top:96px;padding-bottom:96px;}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.hero h1{font-size:clamp(2.4rem,5vw,4.1rem);color:#fff;margin-bottom:22px;}
.hero .eyebrow{color:var(--gold);}
.hero p.lead{font-size:1.25rem;color:rgba(234,241,255,.82);max-width:560px;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-media{position:relative;}
.hero-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.12);}
.hero-badge{
  position:absolute;left:-18px;bottom:26px;background:#fff;color:var(--navy);
  border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-lg);display:flex;gap:12px;align-items:center;
}
.hero-badge .n{font-family:var(--font-display);font-size:1.6rem;font-weight:700;color:var(--blue);line-height:1;}
.hero-badge small{display:block;font-size:.78rem;color:var(--ink-2);}

/* ---------- Stat band ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat{text-align:center;padding:8px;}
.stat .n{font-family:var(--font-display);font-size:clamp(2rem,4vw,3rem);font-weight:700;color:var(--blue);line-height:1;}
.stat--gold .n{color:var(--gold);}
.stat .l{margin-top:8px;font-size:.98rem;color:var(--ink-2);}
.section--dark .stat .l{color:rgba(234,241,255,.7);}

/* ---------- Cards ---------- */
.grid{display:grid;gap:24px;}
.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:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px;box-shadow:var(--shadow-sm);transition:.25s;height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c9d8f5;}
.card .num{font-family:var(--font-display);font-size:.95rem;font-weight:700;color:var(--blue);letter-spacing:.1em;}
.card h3{font-size:1.3rem;margin:14px 0 10px;}
.card p{color:var(--ink-2);font-size:1.02rem;margin:0;}
.card .ic{width:52px;height:52px;border-radius:12px;background:var(--ice);display:grid;place-items:center;margin-bottom:18px;color:var(--blue);}
.card .ic svg{width:26px;height:26px;}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-family:var(--font-display);font-weight:600;font-size:.95rem;color:var(--blue);}
.card .more svg{width:16px;height:16px;transition:.2s;}
.card:hover .more svg{transform:translateX(4px);}

/* image card (gallery / service tiles) */
.tile{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);background:var(--navy);}
.tile img{width:100%;height:100%;object-fit:cover;transition:.4s;aspect-ratio:4/3;}
.tile:hover img{transform:scale(1.06);}
.tile .cap{position:absolute;left:0;right:0;bottom:0;padding:18px 20px;color:#fff;
  background:linear-gradient(transparent,rgba(10,27,46,.92));}
.tile .cap b{font-family:var(--font-display);font-size:1.1rem;display:block;}
.tile .cap span{font-size:.88rem;color:rgba(234,241,255,.8);}

/* feature row (image + text) */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.feature.rev .feature-media{order:2;}
.feature-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow);border:1px solid var(--line);}
.feature h2{font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:16px;}
.feature p{color:var(--ink-2);}
.feature ul.ticks{margin-top:18px;}
ul.ticks li{position:relative;padding-left:30px;margin:10px 0;color:var(--ink);}
ul.ticks li::before{content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;background:var(--ice);}
ul.ticks li::after{content:"";position:absolute;left:7px;top:9px;width:6px;height:10px;border:solid var(--blue);border-width:0 2px 2px 0;transform:rotate(45deg);}

/* material / spec table */
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);}
.spec-table th,.spec-table td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:1rem;}
.spec-table th{background:var(--navy);color:#fff;font-family:var(--font-display);font-weight:600;letter-spacing:.02em;}
.spec-table tr:last-child td{border-bottom:0;}
.spec-table tbody tr:nth-child(even){background:var(--ice-2);}
.spec-table td b{color:var(--navy);}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{position:relative;padding:28px 24px;border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;}
.step .no{font-family:var(--font-display);font-size:2.4rem;font-weight:700;color:var(--ice);line-height:1;position:absolute;top:14px;right:18px;}
.step h4{font-size:1.15rem;margin-bottom:8px;color:var(--navy);}
.step p{font-size:.96rem;color:var(--ink-2);margin:0;}

/* testimonial */
.quote{background:var(--bg);border-radius:var(--radius-lg);padding:44px;text-align:center;max-width:860px;margin:0 auto;box-shadow:var(--shadow-sm);}
.quote p{font-family:var(--font-display);font-size:clamp(1.3rem,2.4vw,1.9rem);font-weight:500;color:var(--navy);line-height:1.4;margin-bottom:20px;}
.quote .who{font-size:.95rem;color:var(--ink-2);}
.quote .who b{color:var(--blue);}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--navy),var(--blue-d));color:#fff;border-radius:var(--radius-lg);padding:56px;text-align:center;position:relative;overflow:hidden;}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:40px 40px;}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{color:#fff;font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:14px;}
.cta-band p{color:rgba(255,255,255,.85);font-size:1.15rem;margin-bottom:26px;}

/* breadcrumb */
.breadcrumb{font-size:.9rem;color:var(--ink-2);padding:18px 0;}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--blue);}
.breadcrumb span{margin:0 8px;color:#aab6c8;}

/* page hero (interior) */
.page-hero{background:var(--navy);color:#fff;position:relative;overflow:hidden;}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,255,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,255,.10) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(circle at 80% 20%,#000,transparent 70%);-webkit-mask-image:radial-gradient(circle at 80% 20%,#000,transparent 70%);}
.page-hero .container{position:relative;z-index:2;padding:72px 24px;}
.page-hero h1{font-size:clamp(2rem,4vw,3.2rem);color:#fff;}
.page-hero p{color:rgba(234,241,255,.8);font-size:1.2rem;max-width:680px;margin-top:14px;}

/* forms */
.field{margin-bottom:20px;}
.field label{display:block;font-weight:600;margin-bottom:8px;color:var(--navy);font-size:1rem;}
.field input,.field select,.field textarea{
  width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-body);font-size:1.05rem;color:var(--ink);background:#fff;transition:.15s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(37,99,255,.12);}
.field textarea{resize:vertical;min-height:130px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-sm);}
.form-note{font-size:.9rem;color:var(--ink-2);margin-top:14px;}
.contact-info{background:var(--navy);color:#fff;border-radius:var(--radius-lg);padding:36px;}
.contact-info h3{color:#fff;margin-bottom:18px;font-size:1.4rem;}
.contact-info .row{display:flex;gap:14px;align-items:flex-start;margin:16px 0;}
.contact-info .row .ic{width:42px;height:42px;flex:none;border-radius:10px;background:rgba(37,99,255,.18);display:grid;place-items:center;color:var(--gold);}
.contact-info .row b{display:block;font-family:var(--font-display);color:#fff;}
.contact-info .row span{font-size:.98rem;color:rgba(234,241,255,.78);}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;background:#fff;overflow:hidden;}
.faq-q{width:100%;text-align:left;background:none;border:0;cursor:pointer;padding:20px 24px;font-family:var(--font-display);font-weight:600;font-size:1.1rem;color:var(--navy);display:flex;justify-content:space-between;align-items:center;gap:16px;}
.faq-q .pm{width:26px;height:26px;flex:none;border-radius:50%;background:var(--ice);color:var(--blue);display:grid;place-items:center;font-size:1.2rem;transition:.2s;}
.faq-item.open .faq-q .pm{transform:rotate(45deg);background:var(--blue);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 24px 22px;color:var(--ink-2);margin:0;}

/* footer */
.site-footer{background:var(--navy);color:rgba(234,241,255,.78);padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand p{font-size:.98rem;color:rgba(234,241,255,.65);max-width:320px;}
.footer-col h4{color:#fff;font-size:1.05rem;margin-bottom:16px;font-family:var(--font-display);letter-spacing:.02em;}
.footer-col a{display:block;color:rgba(234,241,255,.72);padding:6px 0;font-size:.98rem;}
.footer-col a:hover{color:var(--gold);}
.footer-contact{font-size:.96rem;line-height:1.9;}
.footer-contact b{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.88rem;color:rgba(234,241,255,.55);}
.footer-bottom a{color:rgba(234,241,255,.7);}
.footer-social{display:flex;gap:10px;margin-top:16px;}
.footer-social a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);display:grid;place-items:center;color:#fff;transition:.2s;}
.footer-social a:hover{background:var(--blue);}

/* utilities */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.lead{font-size:1.18rem;color:var(--ink-2);}
.center{margin-left:auto;margin-right:auto;}
.mx-auto{margin-left:auto;margin-right:auto;}
.reveal{opacity:0;transform:translateY(24px);transition:.6s ease;}
.reveal.in{opacity:1;transform:none;}

/* ===== News / Articles ===== */
.news-grid{gap:28px;margin-top:8px;}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid #e6ecf5;border-radius:16px;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;}
.news-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(10,27,46,.12);}
.news-card img{width:100%;height:210px;object-fit:cover;display:block;}
.news-card .nc-body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:10px;flex:1;}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#2563FF;background:rgba(37,99,255,.08);padding:4px 10px;border-radius:999px;width:fit-content;}
.news-card h3{font-size:21px;line-height:1.32;}
.news-card .meta{color:#6b7280;font-size:14px;}
.news-card .excerpt{color:#475569;font-size:15px;line-height:1.6;flex:1;}
.news-card .more{font-weight:600;color:#2563FF;font-size:15px;display:inline-flex;align-items:center;gap:6px;}
.article-wrap{max-width:820px;margin:0 auto;}
.article-wrap h2{font-size:27px;line-height:1.3;margin:36px 0 14px;}
.article-wrap p{font-size:18px;line-height:1.8;margin:0 0 18px;color:#334155;}
.article-wrap ul{margin:0 0 18px;padding-left:22px;}
.article-wrap li{font-size:18px;line-height:1.8;margin-bottom:9px;color:#334155;}
.article-cover{width:100%;height:380px;object-fit:cover;border-radius:18px;margin:10px 0 26px;}
.article-meta{display:flex;gap:14px;align-items:center;color:#6b7280;font-size:15px;margin-bottom:6px;flex-wrap:wrap;}