/* ============================================================
   云南伟乾科技 · Blackmagic Design 授权经销展示站
   共享样式表 — 暗色工业风 / Blackmagic 风格
   ============================================================ */

:root {
  --bg:        #060606;
  --bg-2:      #0c0c0c;
  --panel:     #141414;
  --panel-2:   #1b1b1b;
  --line:      #2a2a2a;
  --red:       #ED1C24;   /* Blackmagic 标志红 */
  --red-dk:    #b3000a;
  --text:      #f4f4f4;
  --muted:     #9aa0a6;
  --muted-2:   #6b7177;
  --gold:      #f5c542;
  --maxw:      1200px;
  --radius:    14px;
  --shadow:    0 18px 50px rgba(0,0,0,.55);
  --font:      "Helvetica Neue", "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(237,28,36,.12), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(40,40,60,.18), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  letter-spacing: .2px;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------------- Header ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8,8,8,.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--red);
  color: #fff; font-weight: 800;
  border-radius: 7px;
  box-shadow: 0 0 18px rgba(237,28,36,.55);
}
.brand-text {
  font-weight: 800; font-size: 19px; letter-spacing: .5px;
  color: #fff;
}
.brand-text em {
  font-style: normal; font-weight: 400; color: var(--muted);
  font-size: 14px; margin-left: 4px;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 9px 14px;
  font-size: 15px;
  color: var(--muted);
  border-radius: 9px;
  transition: .2s;
}
.main-nav a:hover { color: #fff; background: var(--panel); }
.main-nav a.active { color: #fff; background: rgba(237,28,36,.16); }
.nav-cta {
  background: var(--red) !important;
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 0 18px rgba(237,28,36,.4);
}
.nav-cta:hover { background: var(--red-dk) !important; }
.nav-toggle {
  display: none;
  background: var(--panel);
  border: 1px solid var(--line);
  color: #fff; font-size: 20px;
  width: 42px; height: 38px; border-radius: 9px;
  cursor: pointer;
}

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  padding: 92px 0 70px;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(transparent 0, transparent 31px, rgba(255,255,255,.025) 32px),
    linear-gradient(90deg, transparent 0, transparent 31px, rgba(255,255,255,.025) 32px);
  background-size: 32px 32px;
  pointer-events: none;
  mask-image: radial-gradient(circle at 50% 30%, #000, transparent 75%);
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-size: 13px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--red); font-weight: 700;
  border: 1px solid rgba(237,28,36,.4);
  padding: 5px 12px; border-radius: 30px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.08;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: .5px;
}
.hero h1 .accent {
  background: linear-gradient(90deg, #ff5a5a, var(--red));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead {
  font-size: 18px; color: var(--muted); max-width: 560px; margin: 0 0 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 10px;
  font-weight: 700; font-size: 15px; transition: .2s; cursor: pointer;
}
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 24px rgba(237,28,36,.4); }
.btn-primary:hover { background: var(--red-dk); transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--line); color: #fff; }
.btn-ghost:hover { border-color: var(--red); color: #fff; }

/* hero visual card */
.hero-card {
  position: relative;
  border-radius: 18px;
  padding: 30px;
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(237,28,36,.25), transparent 50%),
    linear-gradient(160deg, #161616, #0a0a0a);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-card .chip {
  font-size: 12px; letter-spacing: 2px; color: var(--muted);
  text-transform: uppercase;
}
.hero-card .big {
  font-size: 30px; font-weight: 800; margin: 6px 0 18px;
}
.hero-card .row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0; border-top: 1px solid var(--line);
  font-size: 14px; color: var(--muted);
}
.hero-card .row b { color: #fff; }

/* ---------------- Sections ---------------- */
section { padding: 64px 0; }
.section-head { margin-bottom: 36px; max-width: 760px; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  margin: 0 0 12px; font-weight: 800;
}
.section-head p { color: var(--muted); font-size: 17px; margin: 0; }

/* cards grid */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: .25s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: linear-gradient(90deg, var(--red), transparent);
  opacity: 0; transition: .25s;
}
.card:hover { transform: translateY(-4px); border-color: #3a3a3a; }
.card:hover::before { opacity: 1; }
.card h3 { margin: 0 0 8px; font-size: 19px; font-weight: 700; }
.card .en { color: var(--red); font-size: 13px; letter-spacing: 1px; font-weight: 600; }
.card p { color: var(--muted); font-size: 14.5px; margin: 10px 0 0; }
.card .more {
  display: inline-block; margin-top: 16px; color: #fff; font-weight: 600; font-size: 14px;
}
.card .more:hover { color: var(--red); }

/* stat */
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.stat {
  text-align: center; padding: 30px 16px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-2);
}
.stat .num { font-size: 38px; font-weight: 800; color: #fff; }
.stat .num span { color: var(--red); }
.stat .lbl { color: var(--muted); font-size: 14px; margin-top: 6px; }

/* feature split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }

/* callout banner */
.callout {
  border-radius: 18px;
  padding: 46px;
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(237,28,36,.22), transparent 55%),
    linear-gradient(160deg, #181818, #0c0c0c);
  border: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap;
}
.callout h2 { margin: 0 0 8px; font-size: 28px; }
.callout p { margin: 0; color: var(--muted); }

/* ---------------- About ---------------- */
.about-hero { padding: 80px 0 40px; }
.about-hero h1 { font-size: clamp(32px,4.5vw,52px); font-weight: 800; margin: 0 0 16px; }
.about-hero p { color: var(--muted); font-size: 18px; max-width: 720px; }
.badge-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(237,28,36,.4); color: #ffd9db;
  padding: 9px 16px; border-radius: 30px; font-size: 14px; font-weight: 600;
  background: rgba(237,28,36,.08);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red); box-shadow: 0 0 10px var(--red); }

.timeline { border-left: 2px solid var(--line); padding-left: 26px; margin-left: 6px; }
.timeline .item { position: relative; padding: 0 0 28px; }
.timeline .item::before {
  content: ""; position: absolute; left: -33px; top: 4px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--red); box-shadow: 0 0 12px rgba(237,28,36,.6);
}
.timeline h4 { margin: 0 0 4px; font-size: 17px; }
.timeline p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------------- Products ---------------- */
.cat-card { min-height: 150px; display: flex; flex-direction: column; }
.cat-card .en { margin-bottom: 6px; }
.cat-card h3 { flex: 0 0 auto; }

/* ---------------- Contact ---------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.info-card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
}
.info-card h3 { margin: 0 0 18px; font-size: 20px; }
.info-row { display: flex; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); }
.info-row:first-of-type { border-top: 0; }
.info-row .ic {
  width: 38px; height: 38px; flex: 0 0 38px; border-radius: 9px;
  display: grid; place-items: center; background: rgba(237,28,36,.12); color: var(--red); font-size: 18px;
}
.info-row .k { color: var(--muted); font-size: 13px; }
.info-row .v { color: #fff; font-size: 16px; font-weight: 600; }

.form-card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
}
.form-card label { display: block; font-size: 13px; color: var(--muted); margin: 0 0 6px; }
.form-card input, .form-card textarea, .form-card select {
  width: 100%; padding: 12px 14px; margin-bottom: 16px;
  background: #0c0c0c; border: 1px solid var(--line); border-radius: 9px;
  color: #fff; font-family: inherit; font-size: 15px;
}
.form-card input:focus, .form-card textarea:focus, .form-card select:focus {
  outline: none; border-color: var(--red);
}
.form-card textarea { min-height: 110px; resize: vertical; }
.note { font-size: 13px; color: var(--muted-2); margin-top: 4px; }

/* ---------------- Media ---------------- */
.media-card {
  display: block;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
  transition: .25s;
}
.media-card:hover { transform: translateY(-4px); border-color: var(--red); }
.media-card .tag {
  display: inline-block; font-size: 12px; letter-spacing: 1px; color: var(--red);
  border: 1px solid rgba(237,28,36,.35); padding: 4px 10px; border-radius: 20px; margin-bottom: 14px;
}
.media-card h3 { margin: 0 0 8px; font-size: 20px; }
.media-card p { color: var(--muted); font-size: 14.5px; margin: 0 0 14px; }
.media-card .go { color: #fff; font-weight: 600; font-size: 14px; }
.media-card .go:hover { color: var(--red); }

.cached-note {
  border: 1px dashed rgba(245,197,66,.4);
  background: rgba(245,197,66,.06);
  border-radius: 12px; padding: 16px 18px; margin-bottom: 30px;
  color: #e9d9a6; font-size: 14px;
}
.cached-note b { color: var(--gold); }

/* ---------------- Footer ---------------- */
.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: #070707;
  padding: 54px 0 26px;
}
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 22px;
  display: grid; grid-template-columns: 1.2fr 2fr; gap: 40px;
}
.footer-brand .brand-text { font-size: 20px; }
.footer-brand p { color: var(--muted); margin: 12px 0 0; font-size: 14px; }
.footer-cols { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.footer-cols h4 { font-size: 14px; margin: 0 0 14px; color: #fff; letter-spacing: 1px; }
.footer-cols a { display: block; color: var(--muted); font-size: 14px; padding: 5px 0; transition: .2s; }
.footer-cols a:hover { color: var(--red); }
.footer-bottom {
  max-width: var(--maxw); margin: 30px auto 0; padding: 20px 22px 0;
  border-top: 1px solid var(--line);
  color: var(--muted-2); font-size: 13px;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
  .stats { grid-template-columns: repeat(2,1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; background: #0a0a0a; border-bottom: 1px solid var(--line); padding: 10px; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  .callout { padding: 30px; }
}