/* YUNBOND B2B — deep ink + copper design system */
:root {
  --navy: #0B1C2E;
  --navy-2: #12293F;
  --navy-3: #1A3A55;
  --copper: #B87333;
  --copper-2: #D29A5B;
  --steel: #8FA3B5;
  --ink: #1B2733;
  --body: #3D4A57;
  --paper: #F5F6F8;
  --line: #E2E6EB;
  --white: #FFFFFF;
  --blue: #2F6FA8;
  --radius: 10px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Helvetica Neue", -apple-system, "Segoe UI", Arial, sans-serif;
  color: var(--body); background: var(--white); line-height: 1.7; font-size: 16px;
}
h1,h2,h3,h4 { color: var(--ink); line-height: 1.25; font-weight: 700; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.kicker { font-size: 13px; letter-spacing: 3px; text-transform: uppercase; color: var(--copper); font-weight: 700; margin-bottom: 14px; }
.sec-title { font-size: clamp(28px, 3.4vw, 42px); margin-bottom: 16px; }
.lead { font-size: 17px; color: #5C6B78; max-width: 720px; }
section { padding: 96px 0; }
.sec-light { background: var(--paper); }
.sec-dark { background: var(--navy); color: #C7D2DC; }
.sec-dark h2, .sec-dark h3 { color: #fff; }

/* buttons */
.btn {
  display: inline-block; padding: 14px 30px; border-radius: 8px; font-weight: 700;
  font-size: 15px; letter-spacing: .3px; transition: all .25s; cursor: pointer; border: none;
}
.btn-copper { background: var(--copper); color: #fff; }
.btn-copper:hover { background: #9C6128; transform: translateY(-2px); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.55); color: #fff; background: transparent; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: #255B8A; transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 13px; border-radius: 6px; }

/* topbar + header */
.topbar { background: var(--navy-2); color: #9FB2C2; font-size: 12.5px; }
.topbar .container { display: flex; justify-content: space-between; gap: 16px; padding: 7px 24px; flex-wrap: wrap; }
.topbar a { color: #DCE5ED; }
header.site { position: sticky; top: 0; z-index: 200; background: var(--navy); border-bottom: 1px solid var(--navy-3); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand img { height: 50px; width: auto; mix-blend-mode: screen; display: block; }
.brand .brand-en { font-weight: 800; font-size: 18px; letter-spacing: 3px; color: #fff; }
.brand .brand-en small { display: block; font-size: 10px; letter-spacing: 2px; color: var(--steel); font-weight: 600; margin-top: 1px; }
nav.menu { display: flex; align-items: center; gap: 6px; }
nav.menu > a { padding: 10px 14px; font-size: 14.5px; font-weight: 600; color: #C7D2DC; border-radius: 6px; transition: .2s; }
nav.menu > a:hover, nav.menu > a.active { color: var(--copper-2); }
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 26px; cursor: pointer; }

/* hero */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero .bg { position: absolute; inset: 0; background-size: cover; background-position: center 38%; transform: scale(1.03); }
.hero .veil { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(6,16,27,.92) 8%, rgba(6,16,27,.62) 48%, rgba(6,16,27,.25) 100%); }
.hero .inner { position: relative; z-index: 2; padding: 120px 0; }
.hero .tag { display: inline-flex; gap: 10px; align-items: center; font-size: 12.5px; letter-spacing: 2.5px; text-transform: uppercase; color: var(--copper-2); border: 1px solid rgba(210,154,91,.45); padding: 8px 16px; border-radius: 40px; margin-bottom: 26px; }
.hero h1 { color: #fff; font-size: clamp(34px, 4.6vw, 58px); max-width: 760px; margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--copper-2); }
.hero p { font-size: 18px; color: #C7D2DC; max-width: 620px; margin-bottom: 36px; }
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* trust bar */
.trust { background: var(--navy-2); border-top: 1px solid var(--navy-3); }
.trust .container { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 44px; padding: 20px 24px; }
.trust span { display: flex; align-items: center; gap: 9px; font-size: 13.5px; font-weight: 600; color: #C7D2DC; }
.trust svg { width: 17px; height: 17px; stroke: var(--copper-2); }

/* tech duo cards */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.tech-card { position: relative; border-radius: 14px; overflow: hidden; min-height: 430px; display: flex; align-items: flex-end; color: #fff; }
.tech-card .bg { position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform .6s; }
.tech-card:hover .bg { transform: scale(1.05); }
.tech-card .shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(6,16,27,.05) 20%, rgba(6,16,27,.92) 88%); }
.tech-card .body { position: relative; z-index: 2; padding: 34px; }
.tech-card .badge { font-size: 11.5px; letter-spacing: 2px; font-weight: 700; text-transform: uppercase; padding: 5px 12px; border-radius: 30px; display: inline-block; margin-bottom: 14px; }
.badge-blue { background: rgba(47,111,168,.25); color: #9CC4E4; border: 1px solid rgba(156,196,228,.4); }
.badge-copper { background: rgba(184,115,51,.22); color: var(--copper-2); border: 1px solid rgba(210,154,91,.45); }
.tech-card h3 { color: #fff; font-size: 26px; margin-bottom: 8px; }
.tech-card p { color: #C7D2DC; font-size: 14.5px; margin-bottom: 18px; max-width: 420px; }

/* icon feature grid */
.grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; transition: .25s; }
.feat:hover { border-color: var(--copper); transform: translateY(-4px); box-shadow: 0 14px 34px rgba(11,28,46,.08); }
.feat .ic { width: 46px; height: 46px; border-radius: 10px; background: #FBF4EC; color: var(--copper); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.feat .ic svg { width: 23px; height: 23px; }
.feat h4 { font-size: 17px; margin-bottom: 7px; }
.feat p { font-size: 13.8px; color: #5C6B78; }

/* split band */
.split-band { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.split-band .photo { border-radius: 14px; overflow: hidden; box-shadow: 0 20px 50px rgba(11,28,46,.18); }
.spec-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.spec-chips span { font-size: 13px; font-weight: 600; background: var(--paper); border: 1px solid var(--line); padding: 7px 14px; border-radius: 30px; color: var(--ink); }

/* series cards */
.series-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.series-card { background: var(--white); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; transition: .25s; display: flex; flex-direction: column; }
.series-card:hover { border-color: var(--copper); transform: translateY(-4px); box-shadow: 0 16px 40px rgba(11,28,46,.1); }
.series-card .img-wrap { aspect-ratio: 16/10; background: var(--paper); overflow: hidden; }
.series-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.series-card:hover .img-wrap img { transform: scale(1.06); }
.series-card .body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.series-card h3 { font-size: 18px; margin-bottom: 5px; }
.series-card .cnt { font-size: 12.5px; color: var(--copper); font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.series-card p { font-size: 13.8px; color: #5C6B78; flex: 1; }

/* ===== Video grid (2 per row, larger frames) ===== */
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.video-card { background: var(--white); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: .25s; }
.video-card:hover { border-color: var(--copper); box-shadow: 0 16px 40px rgba(11,28,46,.12); transform: translateY(-3px); }
.video-card .vwrap { aspect-ratio: 16/9; background: #0b1c2e; position: relative; }
.video-card video { width: 100%; height: 100%; display: block; object-fit: cover; }
.video-card .body { padding: 18px 22px 20px; }
.video-card .num { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--copper); margin-bottom: 6px; }
.video-card h3 { font-size: 19px; margin: 0 0 6px; }
.video-card p { font-size: 14px; color: #5C6B78; margin: 0; }
@media (max-width: 860px) { .video-grid { grid-template-columns: 1fr; } }

/* ===== SKU cards (large-image catalog) ===== */
.sku-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.sku-card { background: var(--white); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; transition: .25s; }
.sku-card:hover { border-color: var(--copper); box-shadow: 0 16px 40px rgba(11,28,46,.12); transform: translateY(-3px); }
.sku-card .sku-img { aspect-ratio: 1/1; background: #fff; overflow: hidden; border-bottom: 1px solid var(--line); }
.sku-card .sku-img img { width: 100%; height: 100%; object-fit: contain; padding: 10px; box-sizing: border-box; transition: transform .4s; }
.sku-card:hover .sku-img img { transform: scale(1.04); }
.sku-card .sku-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.sku-card h3 { font-size: 16.5px; margin: 0; line-height: 1.4; color: var(--ink); }
.sku-card .sku-cat { font-size: 11.5px; color: var(--copper); font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; }
.sku-card .sku-specs { font-size: 13.5px; color: #44515C; display: grid; gap: 6px; flex: 1; margin: 2px 0 6px; }
.sku-card .sku-specs > div { display: flex; gap: 10px; line-height: 1.45; }
.sku-card .sku-specs b { color: #1B2733; font-weight: 600; min-width: 76px; flex-shrink: 0; }
@media (max-width: 1024px) { .sku-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .sku-grid { grid-template-columns: 1fr; } }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 26px 12px; }
.stat b { display: block; font-size: clamp(30px, 3.4vw, 44px); color: var(--copper-2); font-weight: 800; line-height: 1.1; }
.stat span { font-size: 13px; color: #9FB2C2; letter-spacing: 1px; text-transform: uppercase; }

/* commercial band */
.terms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.term { border-left: 3px solid var(--copper); padding: 4px 0 4px 20px; }
.term b { display: block; font-size: 26px; color: var(--ink); }
.term span { font-size: 13.5px; color: #5C6B78; }

/* page hero (subpages) */
.page-hero { position: relative; padding: 120px 0 110px; color: #fff; background: var(--navy); overflow: hidden; }
.page-hero .bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .28; }
.page-hero .inner { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(32px, 4.2vw, 52px); max-width: 800px; }
.page-hero p { color: #C7D2DC; font-size: 17px; max-width: 640px; margin-top: 14px; }

/* layer diagram */
.layers { display: grid; gap: 12px; }
/* numbered step cards */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.steps-4 { grid-template-columns: repeat(4, 1fr); }
.step { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 28px 26px; transition: .25s; }
.step:hover { border-color: var(--copper); transform: translateY(-3px); box-shadow: 0 14px 34px rgba(11,28,46,.08); }
.step > b { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; background: var(--navy); color: #fff; font-size: 17px; font-weight: 800; margin-bottom: 16px; }
.step h4 { font-size: 16.5px; margin-bottom: 8px; }
.step p { font-size: 14px; color: #5C6B78; line-height: 1.65; }
/* report image gallery */
.report-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.report-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; transition: .25s; }
.report-card:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(11,28,46,.12); border-color: var(--copper); }
.report-card img { width: 100%; aspect-ratio: 910/1287; object-fit: cover; object-position: top; display: block; }
.report-card .cap { padding: 10px 12px 12px; }
.report-card .cap b { display: block; font-size: 13px; color: var(--ink); line-height: 1.4; margin-bottom: 3px; }
.report-card .cap span { font-size: 11px; letter-spacing: 1px; font-weight: 700; color: var(--copper); text-transform: uppercase; }
.layer { display: grid; grid-template-columns: 220px 1fr; gap: 18px; align-items: center; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; }
.layer b { font-size: 15px; color: var(--ink); }
.layer span { font-size: 13.5px; color: #5C6B78; }
.layer .bar { height: 12px; border-radius: 6px; }

/* product table */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.filters .fbtn { padding: 9px 18px; font-size: 13.5px; font-weight: 600; border: 1px solid var(--line); background: var(--white); color: var(--body); border-radius: 30px; cursor: pointer; transition: .2s; }
.filters .fbtn:hover { border-color: var(--copper); color: var(--copper); }
.filters .fbtn.on { background: var(--navy); color: #fff; border-color: var(--navy); }
.ptable { width: 100%; border-collapse: collapse; background: var(--white); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.ptable th { background: var(--navy); color: #fff; font-size: 12.5px; letter-spacing: .5px; text-transform: uppercase; text-align: left; padding: 14px 16px; }
.ptable td { padding: 13px 16px; font-size: 14px; border-top: 1px solid var(--line); vertical-align: middle; }
.ptable tr:hover td { background: #FBF9F6; }
.ptable .thumb { width: 64px; height: 64px; object-fit: contain; background: var(--paper); border-radius: 8px; padding: 4px; }
.ptable .pname { font-weight: 700; color: var(--ink); }
.ptable .pdim { font-size: 12.5px; color: #7A8794; }
.ptable .mat { font-size: 12.5px; color: #5C6B78; }

/* inquiry cart */
.cart-fab { position: fixed; right: 24px; bottom: 96px; z-index: 300; background: var(--navy); color: #fff; border: none; border-radius: 40px; padding: 13px 22px; font-size: 14px; font-weight: 700; display: none; align-items: center; gap: 10px; cursor: pointer; box-shadow: 0 10px 30px rgba(11,28,46,.35); }
.cart-fab b { background: var(--copper); border-radius: 30px; padding: 2px 10px; font-size: 13px; }
.cart-panel { position: fixed; top: 0; right: -420px; width: 400px; max-width: 92vw; height: 100vh; background: #fff; z-index: 400; box-shadow: -16px 0 50px rgba(11,28,46,.18); transition: right .3s; display: flex; flex-direction: column; }
.cart-panel.open { right: 0; }
.cart-panel .head { padding: 20px 24px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }
.cart-panel .head h3 { font-size: 18px; }
.cart-panel .close { background: none; border: none; font-size: 24px; cursor: pointer; color: #7A8794; }
.cart-items { flex: 1; overflow: auto; padding: 16px 24px; }
.cart-item { display: flex; gap: 14px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.cart-item img { width: 54px; height: 54px; object-fit: contain; background: var(--paper); border-radius: 8px; }
.cart-item .nm { font-size: 13.8px; font-weight: 700; color: var(--ink); flex: 1; }
.cart-item .rm { background: none; border: none; color: #C05353; cursor: pointer; font-size: 13px; }
.cart-empty { text-align: center; color: #7A8794; font-size: 14px; padding: 60px 0; }
.cart-panel .foot { padding: 18px 24px; border-top: 1px solid var(--line); }
.cart-panel .foot .btn { width: 100%; }
.cart-mask { position: fixed; inset: 0; background: rgba(6,16,27,.4); z-index: 350; display: none; }
.cart-mask.open { display: block; }

/* forms */
.form-card { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 36px; }
.form-card label { display: block; font-size: 13px; font-weight: 700; color: var(--ink); margin: 18px 0 7px; }
.form-card input, .form-card textarea, .form-card select {
  width: 100%; padding: 13px 15px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 14.5px; font-family: inherit; background: var(--paper); transition: .2s;
}
.form-card input:focus, .form-card textarea:focus { outline: none; border-color: var(--copper); background: #fff; }
.form-card textarea { min-height: 130px; resize: vertical; }

/* faq */
.faq-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-item summary { padding: 20px 26px; font-size: 16px; font-weight: 700; color: var(--ink); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--copper); font-weight: 400; }
.faq-item[open] summary::after { content: "–"; }
.faq-body { padding: 0 26px 22px; font-size: 14.5px; color: #5C6B78; }

/* cert cards */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cert { background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 28px; text-align: center; }
.cert img { height: 52px; width: auto; margin: 0 auto 14px; object-fit: contain; }
.cert h4 { font-size: 16px; }
.cert p { font-size: 12.5px; color: #7A8794; margin: 6px 0 14px; }

/* CTA band */
.cta-band { background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; text-align: center; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #9FB2C2; max-width: 620px; margin: 0 auto 32px; }
.cta-band .cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* footer */
footer.site { background: var(--navy); color: #9FB2C2; padding: 64px 0 30px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.foot-grid h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.foot-grid a { display: block; font-size: 13.5px; padding: 4px 0; color: #9FB2C2; }
.foot-grid a:hover { color: var(--copper-2); }
.foot-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.foot-logo img { height: 44px; mix-blend-mode: screen; }
.foot-logo b { color: #fff; font-size: 16px; letter-spacing: 2px; }
.foot-bottom { border-top: 1px solid var(--navy-3); margin-top: 44px; padding-top: 22px; font-size: 12.5px; color: #6E7F8E; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* WhatsApp float */
.wa { position: fixed; right: 24px; bottom: 24px; z-index: 300; width: 56px; height: 56px; border-radius: 50%; background: #25D366; display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 24px rgba(37,211,102,.4); transition: .2s; }
.wa:hover { transform: scale(1.08); }
.wa svg { width: 30px; height: 30px; fill: #fff; }

/* placeholders for missing assets */
.asset-todo { border: 1.5px dashed #C9A97E; background: #FBF4EC; color: #8A6B42; border-radius: 10px; padding: 20px 24px; font-size: 13.5px; }
.asset-todo b { color: #6E5430; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.reveal.vis { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .duo, .split-band { grid-template-columns: 1fr; }
  .grid-6, .series-grid, .cert-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .report-grid { grid-template-columns: repeat(3, 1fr); }
  .stats, .terms { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  section { padding: 64px 0; }
  .hero { min-height: 78vh; }
  .grid-6, .series-grid, .cert-grid, .steps { grid-template-columns: 1fr; }
  .report-grid { grid-template-columns: repeat(2, 1fr); }
  .stats, .terms { grid-template-columns: 1fr; }
  .nav { height: 66px; }
  .menu-toggle { display: block; }
  nav.menu { display: none; position: absolute; top: 66px; left: 0; right: 0; background: var(--navy); flex-direction: column; align-items: stretch; padding: 12px 24px 20px; border-bottom: 1px solid var(--navy-3); }
  nav.menu.open { display: flex; }
  nav.menu > a { padding: 12px 6px; }
  .brand img { height: 40px; }
  .layer { grid-template-columns: 1fr; gap: 8px; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .topbar .container { justify-content: center; text-align: center; }
  .cart-panel { width: 100vw; }
  .cart-fab { bottom: 92px; right: 16px; }
  .wa { right: 16px; }
  .ptable th, .ptable td { padding: 10px 10px; font-size: 13px; }
  .ptable .thumb { width: 48px; height: 48px; }
}