:root {
  color-scheme: light;
  --bg: #f5f8fd;
  --surface: #ffffff;
  --surface-soft: #eef6ff;
  --text: #10243f;
  --muted: #64748b;
  --primary: #0b63ce;
  --primary-dark: #084f9e;
  --accent: #22d3ee;
  --line: rgba(15, 41, 77, 0.1);
  --shadow: 0 24px 70px rgba(12, 38, 79, 0.14);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--bg); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.hero {
  position: relative;
  min-height: 820px;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 15% 20%, rgba(34, 211, 238, 0.35), transparent 28%),
    radial-gradient(circle at 80% 12%, rgba(86, 146, 255, 0.35), transparent 26%),
    linear-gradient(135deg, #06152d 0%, #0a3972 52%, #0b63ce 100%);
}
.hero::after { content: ""; position: absolute; inset: auto -10% -45% -10%; height: 420px; background: #f5f8fd; transform: rotate(-4deg); transform-origin: left top; }
.nav { position: relative; z-index: 5; width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand > span { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 16px; color: #082246; background: linear-gradient(135deg, #e9fbff, #7ee6ff); font-size: 26px; font-weight: 900; box-shadow: 0 16px 38px rgba(34, 211, 238, 0.26); }
.brand strong { display: grid; font-size: 18px; line-height: 1.2; }
.brand small { margin-top: 3px; color: rgba(255,255,255,.62); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 24px; color: rgba(255,255,255,.82); font-size: 15px; }
.nav-links a { transition: color .2s ease; }
.nav-links a:hover { color: #fff; }
.nav-toggle { display: none; border: 0; width: 44px; height: 44px; border-radius: 12px; color: #fff; background: rgba(255,255,255,.14); font-size: 22px; cursor: pointer; }

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; gap: 58px; align-items: center; padding: 72px 0 180px; }
.hero-badge { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 24px; padding: 8px 14px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; color: #dff9ff; background: rgba(255,255,255,.1); backdrop-filter: blur(12px); font-size: 14px; }
.hero-badge i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 18px var(--accent); }
h1 { margin: 0; font-size: clamp(44px, 6vw, 82px); line-height: 1.08; letter-spacing: -2.8px; }
h1 span { color: #9decff; }
.lead { max-width: 690px; margin: 28px 0 0; color: rgba(255,255,255,.78); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 13px 22px; border-radius: 999px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn.primary { color: #fff; background: linear-gradient(135deg, var(--primary), #129bd8); box-shadow: 0 18px 44px rgba(0, 112, 220, .28); }
.hero .btn.primary { color: #082246; background: linear-gradient(135deg, #fff, #8ceeff); }
.btn.ghost { color: #fff; border: 1px solid rgba(255,255,255,.24); background: rgba(255,255,255,.1); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.hero-tags span { padding: 7px 12px; border-radius: 999px; color: #dff9ff; background: rgba(255,255,255,.12); font-size: 13px; }

.hero-visual { position: relative; min-height: 540px; }
.grid-map { position: absolute; inset: 52px 0 28px; border-radius: 36px; background: linear-gradient(135deg, rgba(255,255,255,.14), rgba(255,255,255,.04)), repeating-linear-gradient(90deg, transparent 0 34px, rgba(255,255,255,.12) 35px 36px), repeating-linear-gradient(0deg, transparent 0 34px, rgba(255,255,255,.12) 35px 36px); border: 1px solid rgba(255,255,255,.18); transform: perspective(780px) rotateX(58deg) rotateZ(-18deg); box-shadow: 0 40px 110px rgba(0,0,0,.26); }
.card-glass { position: absolute; z-index: 2; padding: 22px; border: 1px solid rgba(255,255,255,.22); border-radius: 24px; background: rgba(8, 35, 78, .54); backdrop-filter: blur(18px); box-shadow: 0 22px 60px rgba(0,0,0,.24); }
.card-glass small { display: block; color: #9decff; letter-spacing: 2px; font-weight: 800; }
.card-glass strong { display: block; margin: 8px 0 4px; font-size: 24px; }
.card-glass span { color: rgba(255,255,255,.7); font-size: 13px; }
.flight-card { top: 40px; left: 8px; }
.model-card { right: 2px; bottom: 40px; }
.drone { position: absolute; right: 120px; top: 184px; z-index: 3; width: 150px; height: 78px; display: grid; place-items: center; border-radius: 999px; color: #082246; background: linear-gradient(135deg, #fff, #8ceeff); font-weight: 900; box-shadow: 0 28px 80px rgba(34, 211, 238, .36); animation: float 4s ease-in-out infinite; }
.drone span { display: block; color: #0b63ce; font-size: 11px; letter-spacing: 1px; }
.blocks { position: absolute; left: 80px; right: 70px; bottom: 88px; z-index: 1; display: grid; grid-template-columns: repeat(9, 1fr); gap: 8px; align-items: end; transform: perspective(560px) rotateX(52deg) rotateZ(-16deg); }
.blocks i { min-height: 120px; border-radius: 8px 8px 2px 2px; background: linear-gradient(180deg, #9decff, #0b63ce); box-shadow: 0 14px 30px rgba(0,0,0,.24); }
.blocks i:nth-child(2n) { min-height: 82px; }
.blocks i:nth-child(3n) { min-height: 160px; }

.stats { position: relative; z-index: 3; margin-top: -82px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stats article, .cards article, .case-card, .timeline article, .asset-list div, .contact-card, .solution-panel { border: 1px solid var(--line); border-radius: 28px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); }
.stats article { padding: 26px; }
.stats strong { display: block; color: var(--primary); font-size: 26px; }
.stats span, .title p, .cards p, .case-card p, .case-card li, .timeline p, .asset-copy p, .asset-list span, .checks, .contact p { color: var(--muted); }
.section { padding-top: 112px; }
.title { max-width: 820px; margin: 0 auto 46px; text-align: center; }
.eyebrow { margin: 0 0 12px; color: var(--primary); font-weight: 900; letter-spacing: 2px; text-transform: uppercase; }
h2 { margin: 0 0 16px; font-size: clamp(32px, 4vw, 48px); line-height: 1.18; letter-spacing: -1.2px; }
h3 { margin: 16px 0 10px; font-size: 22px; }
.cards { display: grid; gap: 22px; }
.four { grid-template-columns: repeat(4, 1fr); }
.cards article { padding: 30px; transition: transform .22s ease, border-color .22s ease; }
.cards article:hover, .case-card:hover { transform: translateY(-8px); border-color: rgba(34, 211, 238, .45); }
.cards b, .timeline b { color: var(--accent); letter-spacing: 2px; }
.band { margin-top: 112px; padding: 96px 0; background: linear-gradient(135deg, #eaf5ff, #fff 48%, #e9fbff); }
.split { display: grid; grid-template-columns: 1fr .88fr; gap: 58px; align-items: center; }
.checks { display: grid; gap: 14px; padding: 0; margin: 28px 0 0; list-style: none; }
.checks li { position: relative; padding-left: 30px; }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 900; }
.solution-panel { display: grid; gap: 16px; padding: 30px; background: #071e3e; }
.solution-panel div { padding: 22px; border-radius: 20px; background: linear-gradient(135deg, rgba(255,255,255,.12), rgba(255,255,255,.04)); color: #fff; }
.solution-panel span { display: block; color: #9decff; font-size: 13px; }
.solution-panel strong { display: block; margin-top: 6px; font-size: 21px; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { overflow: hidden; transition: transform .22s ease, border-color .22s ease; }
.case-card h3, .case-card p, .case-card ul { padding-left: 28px; padding-right: 28px; }
.case-card ul { margin: 0 0 28px; }
.case-visual { min-height: 230px; display: flex; align-items: flex-end; padding: 22px; color: #fff; background: #0b63ce; position: relative; overflow: hidden; }
.case-visual::before { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(45deg, rgba(255,255,255,.18) 0 2px, transparent 2px 22px), linear-gradient(135deg, rgba(5,19,44,.2), rgba(34,211,238,.22)); transition: transform .3s ease; }
.case-card:hover .case-visual::before { transform: scale(1.08); }
.case-visual span { position: relative; z-index: 1; padding: 7px 12px; border-radius: 999px; background: rgba(5,19,44,.58); font-size: 13px; }
.case-visual.culture { background: linear-gradient(135deg, #0f2748, #14b8a6); }
.case-visual.water { background: linear-gradient(135deg, #0b63ce, #22d3ee); }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.timeline article { padding: 28px; }
.assets { display: grid; grid-template-columns: .9fr 1.1fr; gap: 44px; align-items: center; }
.asset-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.asset-list div { padding: 24px; }
.asset-list strong, .asset-list span { display: block; }
.asset-list strong { margin-bottom: 8px; color: var(--primary); font-size: 20px; }
.contact { margin-top: 112px; margin-bottom: 90px; padding: 52px; display: grid; grid-template-columns: 1fr .88fr; gap: 34px; align-items: center; border-radius: 34px; color: #fff; background: linear-gradient(135deg, #071e3e, #0b63ce); box-shadow: var(--shadow); }
.contact h2, .contact .eyebrow, .contact p { color: #fff; }
.contact p { opacity: .82; }
.contact-card { padding: 30px; color: var(--text); }
.contact-card p { margin: 0 0 12px; color: var(--text); opacity: 1; }
.contact-card .btn { margin-top: 12px; }
footer { padding: 30px 20px; text-align: center; color: rgba(255,255,255,.74); background: #071428; }
footer p { margin: 4px 0; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }
@media (max-width: 980px) { .nav-toggle { display: inline-grid; place-items: center; } .nav-links { position: absolute; top: 82px; left: 0; right: 0; display: none; flex-direction: column; align-items: flex-start; padding: 20px; border-radius: 18px; background: rgba(5, 22, 50, .96); } .nav-links.open { display: flex; } .hero-inner, .split, .assets, .contact { grid-template-columns: 1fr; } .stats, .four, .case-grid, .timeline { grid-template-columns: repeat(2, 1fr); } .hero { min-height: auto; } .hero-inner { padding-bottom: 150px; } }
@media (max-width: 640px) { .wrap, .nav { width: min(100% - 28px, 1180px); } h1 { letter-spacing: -1.4px; } .hero-inner { padding-top: 38px; } .hero-visual { min-height: 360px; } .flight-card, .model-card { position: relative; inset: auto; margin-bottom: 14px; } .drone { right: 20px; top: 160px; } .blocks { left: 24px; right: 24px; bottom: 30px; } .stats, .four, .case-grid, .timeline, .asset-list { grid-template-columns: 1fr; } .stats { margin-top: -46px; } .section { padding-top: 78px; } .band { margin-top: 78px; padding: 70px 0; } .contact { padding: 30px 22px; } }