/* ═══════════ 沈阳皇姑智能云 · 官网样式 ═══════════ */
:root {
  --blue-900: #172554;
  --blue-800: #1e3a8a;
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --teal-600: #0d9488;
  --teal-100: #ccfbf1;
  --violet-600: #7c3aed;
  --violet-100: #ede9fe;
  --amber-600: #d97706;
  --amber-100: #fef3c7;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-3: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --line: #e2e8f0;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ─────────── 导航 ─────────── */
.nav-wrap {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-size: 18px; font-weight: 600; letter-spacing: .5px; }
.brand-name b { color: var(--blue-600); font-weight: 800; }

.nav-menu { display: flex; list-style: none; gap: 4px; }
.nav-menu a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: var(--ink-2); text-decoration: none; font-size: 15px; transition: .18s;
}
.nav-menu a:hover { color: var(--blue-600); background: var(--blue-50); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: .2s; }

/* ─────────── Hero（全幅背景图）─────────── */
.hero {
  position: relative;
  min-height: 560px;
  display: flex; align-items: center;
  padding: 110px 0 96px;
  overflow: hidden;
  background: #0f1e3d;
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(11,24,48,.88) 0%, rgba(15,30,61,.66) 45%, rgba(23,37,84,.30) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 720px; }
.hero-kicker {
  display: inline-block; font-size: 13.5px; color: #bfdbfe;
  background: rgba(37,99,235,.28); border: 1px solid rgba(147,197,253,.45);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 24px; font-weight: 500;
  backdrop-filter: blur(6px);
}
h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.18; font-weight: 800; letter-spacing: 1px; color: #fff; }
.grad-text {
  background: linear-gradient(92deg, #60a5fa 10%, #38bdf8 55%, #5eead4 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin-top: 22px; font-size: 17px; color: #dbeafe; max-width: 640px; }
.hero-sub b { color: #93c5fd; }
.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 26px; border-radius: 10px; font-size: 15.5px; font-weight: 600;
  text-decoration: none; transition: .2s; border: 1px solid transparent;
}
.btn-primary { background: var(--blue-600); color: #fff; box-shadow: 0 6px 18px rgba(37,99,235,.4); }
.btn-primary:hover { background: var(--blue-500); transform: translateY(-1px); }
.btn-ghost { border-color: rgba(191,219,254,.55); color: #e0f2fe; background: rgba(255,255,255,.06); }
.btn-ghost:hover { border-color: #93c5fd; background: rgba(147,197,253,.14); }

/* ─────────── 数据条 ─────────── */
.stats-band {
  background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);
  color: #fff; padding: 34px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; }
.stat strong { display: block; font-size: 28px; font-weight: 800; }
.stat span { font-size: 13px; color: #bfdbfe; }

/* ─────────── 通用 Section ─────────── */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.eyebrow {
  font-size: 13px; font-weight: 700; color: var(--blue-600);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 10px;
}
.sec-title { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; margin-bottom: 14px; }
.sec-sub { color: var(--ink-3); font-size: 16px; margin-bottom: 40px; }

/* 概况 */
.lead { font-size: 17.5px !important; color: var(--ink) !important; font-weight: 500; }

/* ─────────── 卡片 ─────────── */
.cards-2x2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.cards-3x1 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px; transition: .22s;
}
.card:hover { border-color: #bfdbfe; box-shadow: 0 14px 34px rgba(30,58,138,.08); transform: translateY(-3px); }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.card p { color: var(--ink-2); font-size: 14.5px; }
.card p b { color: var(--blue-700); }
.card-tall { display: flex; flex-direction: column; }

.card-icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.card-icon svg { width: 24px; height: 24px; }
.i-blue  { background: var(--blue-100);   color: var(--blue-600); }
.i-teal  { background: var(--teal-100);   color: var(--teal-600); }
.i-violet{ background: var(--violet-100); color: var(--violet-600); }
.i-amber { background: var(--amber-100);  color: var(--amber-600); }

/* ─────────── 产业成效 ─────────── */
.outcomes-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.outcome {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 20px; text-align: center;
}
.outcome strong { display: block; font-size: 30px; font-weight: 800; color: var(--blue-700); }
.outcome span { font-size: 13px; color: var(--ink-3); margin-top: 6px; display: block; }
.outcomes-note { text-align: center; color: var(--ink-3); font-size: 14px; margin-top: 26px; }

/* ─────────── 六大优势 ─────────── */
.adv-list {
  list-style: none; counter-reset: adv;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 28px;
}
.adv-list li {
  counter-increment: adv;
  background: var(--bg-alt); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px 18px 58px; position: relative;
  color: var(--ink-2); font-size: 15px;
}
.adv-list li::before {
  content: counter(adv, decimal-leading-zero);
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  font-size: 19px; font-weight: 800; color: #93c5fd;
}
.adv-list li b { color: var(--ink); }

/* ─────────── 页脚与备案 ─────────── */
.footer { background: var(--blue-900); color: #cbd5e1; padding: 56px 0 32px; }
.top-row {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 24px; flex-wrap: wrap; padding-bottom: 28px; border-bottom: 1px solid rgba(148,163,184,.18);
}
.tagline { font-size: 17px; font-weight: 600; color: #e2e8f0; line-height: 1.7; }
.contact { font-size: 14px; color: #94a3b8; }

.beian-row {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px 24px; padding: 22px 0 6px; font-size: 13.5px; color: #94a3b8;
}
.beian-row a { color: #cbd5e1; text-decoration: none; transition: .15s; }
.beian-row a:hover { color: #fff; text-decoration: underline; }
.beian-notice { font-size: 12px; color: #64748b; margin-top: 8px; }

.noscript-banner {
  background: #fef3c7; color: #92400e; text-align: center; padding: 8px 16px; font-size: 13.5px;
}

/* ─────────── 响应式 ─────────── */
@media (max-width: 900px) {
  .hero { min-height: 480px; padding: 88px 0 72px; }
  .intro-cards { grid-template-columns: 1fr; }
  .media-cards { grid-template-columns: 1fr; }
  .media-card { flex-direction: column; }
  .media-img { flex: none; height: 220px; }
  .cards-3x1 { grid-template-columns: 1fr; }
  .outcomes-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .section { padding: 60px 0; }
  .hero { padding: 72px 0 56px; min-height: 420px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .nav-toggle { display: block; }
  .nav-menu {
    position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 8px 24px 16px; gap: 2px;
    display: none; box-shadow: 0 16px 30px rgba(15,23,42,.08);
  }
  .nav-menu.open { display: flex; }
  .cards-2x2 { grid-template-columns: 1fr; }
  .adv-list { grid-template-columns: 1fr; }
  .top-row { flex-direction: column; }
  .beian-row { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}


/* ─────────── 概况三卡 ─────────── */
.intro-body { max-width: 880px; margin: 24px 0 36px; }
.intro-body p { color: var(--ink-2); font-size: 15.5px; margin-bottom: 14px; }
.intro-body p b { color: var(--blue-700); }
.intro-body .lead { font-size: 17.5px; color: var(--ink); font-weight: 500; }
.intro-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.intro-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .22s;
}
.intro-card:hover { border-color: #bfdbfe; box-shadow: 0 14px 34px rgba(30,58,138,.08); transform: translateY(-3px); }
.intro-card h3 { font-size: 16.5px; font-weight: 700; margin: 16px 18px 8px; }
.intro-card p { font-size: 13.5px; color: var(--ink-2); margin: 0 18px 18px; }

.card-img { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #e2e8f0; }
.card-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s ease; }
.card:hover .card-img img { transform: scale(1.04); }

/* ─────────── 四个一 · 横向媒体卡 ─────────── */
.media-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.media-card {
  display: flex; align-items: stretch;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .22s;
}
.media-card:hover { border-color: #bfdbfe; box-shadow: 0 14px 34px rgba(30,58,138,.09); transform: translateY(-3px); }
.media-img { flex: 0 0 42%; position: relative; overflow: hidden; background: #e2e8f0; }
.media-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.media-card:hover .media-img img { transform: scale(1.04); }
.media-body { flex: 1; padding: 24px 22px; display: flex; flex-direction: column; }
.media-body h3 { font-size: 17px; font-weight: 700; margin: 10px 0 10px; }
.media-body p { color: var(--ink-2); font-size: 13.8px; }
.media-body p b { color: var(--blue-700); }

.tag {
  display: inline-flex; align-self: flex-start;
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 999px;
}
.tag-blue   { background: var(--blue-100);   color: var(--blue-700); }
.tag-teal   { background: var(--teal-100);   color: var(--teal-600); }
.tag-violet { background: var(--violet-100); color: var(--violet-600); }
.tag-amber  { background: var(--amber-100);  color: var(--amber-600); }