:root {
  --blue-900: #06295e;
  --blue-800: #0a3a80;
  --blue-700: #0d4fb7;
  --blue-600: #1264da;
  --blue-100: #eaf2ff;
  --slate-900: #111827;
  --slate-700: #334155;
  --slate-500: #64748b;
  --slate-200: #e5e7eb;
  --slate-100: #f5f7fb;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(6, 41, 94, 0.14);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--slate-900);
  background: #fff;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 86px 0; }
.section.alt { background: linear-gradient(180deg, #f8fbff 0%, #eef5ff 100%); }
.section-head { max-width: 760px; margin: 0 auto 36px; text-align: center; }
.eyebrow { margin: 0 0 8px; color: var(--blue-700); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; font-size: 13px; }
h1, h2, h3 { margin: 0; line-height: 1.2; }
h1 { font-size: clamp(38px, 5vw, 66px); letter-spacing: -0.04em; color: #fff; }
h2 { font-size: clamp(28px, 3.5vw, 42px); color: var(--blue-900); }
h3 { font-size: 20px; color: var(--blue-900); }
p { margin: 0; color: var(--slate-700); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, .92);
}
.navbar { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 14px; min-width: 270px; }
.brand-logo { width: 66px; height: auto; flex: 0 0 auto; }
.brand-title { font-size: 18px; font-weight: 800; color: var(--blue-900); line-height: 1.15; }
.brand-sub { font-size: 11px; color: var(--slate-500); letter-spacing: .04em; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14px; font-weight: 700; color: #1e293b; }
.nav-links a { padding: 10px 0; position: relative; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 2px; transform: scaleX(0); background: var(--blue-700); transition: .2s ease; }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta, .btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 0; cursor: pointer; border-radius: 999px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.nav-cta { background: var(--blue-800); color: #fff; padding: 12px 18px; box-shadow: 0 10px 28px rgba(13,79,183,.22); }
.nav-cta:hover, .btn:hover { transform: translateY(-2px); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--slate-200); background: #fff; border-radius: 12px; }
.menu-toggle span { display: block; width: 18px; height: 2px; background: var(--blue-900); margin: 4px auto; }

.hero {
  position: relative;
  min-height: 700px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--blue-900);
}
.hero-bg, .hero-bg img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-bg img { object-fit: cover; object-position: center; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,18,45,.86) 0%, rgba(6,41,94,.70) 38%, rgba(6,41,94,.18) 78%); z-index: 1; }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px; z-index: 2; background: linear-gradient(0deg, #fff 0%, rgba(255,255,255,0) 100%); }
.hero-content { position: relative; z-index: 3; max-width: 760px; padding: 112px 0 90px; }
.hero-kicker { color: #dbeafe; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 16px; }
.hero-lead { margin-top: 20px; font-size: clamp(18px, 2vw, 23px); color: rgba(255,255,255,.86); max-width: 650px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 34px; }
.hero-points span { color: #fff; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.2); padding: 9px 13px; border-radius: 999px; font-weight: 700; backdrop-filter: blur(8px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.btn-primary { background: linear-gradient(135deg, var(--blue-700), var(--blue-600)); color: #fff; padding: 15px 24px; box-shadow: 0 18px 40px rgba(13,79,183,.32); }
.btn-secondary { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); padding: 14px 22px; }
.stats-strip { position: relative; z-index: 5; margin-top: -62px; }
.stats-card { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border-radius: 24px; box-shadow: var(--shadow); overflow: hidden; border: 1px solid rgba(226,232,240,.86); }
.stat { padding: 28px; text-align: center; border-right: 1px solid #edf2f7; }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--blue-700); font-size: clamp(26px,3vw,38px); line-height: 1; margin-bottom: 8px; }
.stat span { color: var(--slate-500); font-size: 14px; font-weight: 700; }

.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; align-items: center; }
.about-copy p { margin-top: 16px; }
.check-list { display: grid; gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; color: var(--slate-700); font-weight: 650; }
.check-list li::before { content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: var(--blue-100); color: var(--blue-700); font-weight: 900; }
.about-visual { position: relative; }
.about-visual img { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit: cover; }
.about-badge { position: absolute; left: -20px; bottom: -24px; width: 220px; background: var(--blue-900); color: #fff; padding: 20px; border-radius: 16px; box-shadow: 0 18px 40px rgba(6,41,94,.28); }
.about-badge strong { display: block; font-size: 28px; }
.about-badge span { color: rgba(255,255,255,.76); font-size: 13px; }

.cards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card { background: #fff; border: 1px solid rgba(226,232,240,.92); border-radius: var(--radius); overflow: hidden; box-shadow: 0 14px 34px rgba(15,23,42,.06); transition: transform .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.card img { aspect-ratio: 4/3; object-fit: cover; }
.card-body { padding: 20px; }
.card-body p { font-size: 14px; margin-top: 8px; }
.capability-list { margin-top: 28px; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.capability-list span { background: #fff; color: var(--blue-900); border: 1px solid #dbeafe; border-radius: 999px; padding: 10px 15px; font-weight: 800; box-shadow: 0 8px 22px rgba(13,79,183,.06); }

.surface-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.surface-card { background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 12px 28px rgba(15,23,42,.08); border: 1px solid rgba(226,232,240,.88); }
.surface-card img { aspect-ratio: 1.25/1; object-fit: cover; }
.surface-card strong { display: block; padding: 14px; text-align: center; color: var(--blue-900); }

.why-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.why-item { background: #fff; padding: 26px 18px; border-radius: var(--radius); text-align: center; border: 1px solid rgba(219,234,254,.92); box-shadow: 0 12px 30px rgba(13,79,183,.06); }
.why-icon { width: 54px; height: 54px; display: grid; place-items: center; margin: 0 auto 14px; color: var(--blue-700); background: var(--blue-100); border-radius: 15px; font-size: 26px; }
.why-item h3 { font-size: 17px; margin-bottom: 8px; }
.why-item p { font-size: 13px; }

.gallery { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; }
.gallery figure { margin: 0; position: relative; overflow: hidden; border-radius: var(--radius); box-shadow: 0 14px 34px rgba(15,23,42,.09); background: #dbeafe; }
.gallery figure:first-child { grid-row: span 2; }
.gallery img { height: 100%; min-height: 245px; object-fit: cover; transition: transform .35s ease; }
.gallery figure:hover img { transform: scale(1.04); }
.gallery figcaption { position: absolute; left: 14px; bottom: 14px; background: rgba(6,41,94,.86); color: #fff; padding: 8px 12px; border-radius: 999px; font-weight: 800; font-size: 13px; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.product { position: relative; border-radius: 18px; overflow: hidden; background: #fff; border: 1px solid #e5e7eb; box-shadow: 0 12px 32px rgba(15,23,42,.06); }
.product img { aspect-ratio: 1/1; object-fit: cover; background: #f8fafc; }
.product-title { position: absolute; left: 12px; right: 12px; bottom: 12px; background: rgba(255,255,255,.92); color: var(--blue-900); padding: 9px 12px; border-radius: 12px; font-size: 14px; font-weight: 850; box-shadow: 0 8px 22px rgba(15,23,42,.08); }

.contact-section { background: radial-gradient(circle at 20% 15%, rgba(18,100,218,.28), transparent 32%), linear-gradient(135deg, #061b3b 0%, #06295e 52%, #0d4fb7 100%); color: #fff; padding: 86px 0; }
.contact-grid { display: grid; grid-template-columns: .86fr 1.14fr; gap: 36px; align-items: start; }
.contact-section h2, .contact-section p { color: #fff; }
.contact-section .eyebrow { color: #bfdbfe; }
.contact-info { display: grid; gap: 14px; margin-top: 28px; }
.contact-info a, .contact-info div { display: flex; align-items: flex-start; gap: 12px; color: rgba(255,255,255,.88); }
.contact-info b { color: #fff; min-width: 85px; }
.contact-form { background: rgba(255,255,255,.98); border-radius: 24px; padding: 28px; box-shadow: 0 22px 60px rgba(0,0,0,.2); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-field { display: grid; gap: 7px; }
.form-field.full { grid-column: 1/-1; }
label { font-size: 13px; font-weight: 800; color: var(--blue-900); }
input, textarea { width: 100%; border: 1px solid #dbe3ee; border-radius: 12px; padding: 13px 14px; font: inherit; color: var(--slate-900); outline: none; background: #f8fafc; }
textarea { min-height: 120px; resize: vertical; }
input:focus, textarea:focus { border-color: var(--blue-600); box-shadow: 0 0 0 4px rgba(18,100,218,.12); background: #fff; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; align-items: center; }
.form-submit { border-radius: 12px; padding: 14px 22px; background: var(--blue-700); color: #fff; border: none; font-weight: 900; cursor: pointer; }
.quick-link { color: var(--blue-700); font-weight: 850; }
.form-note { margin-top: 12px; color: var(--slate-500); font-size: 13px; }

.floating-contact { position: fixed; right: 18px; top: 46%; z-index: 120; transform: translateY(-50%); display: grid; gap: 8px; }
.float-btn { width: 58px; min-height: 58px; display: grid; place-items: center; background: var(--blue-800); color: #fff; border-radius: 16px; box-shadow: 0 18px 44px rgba(6,41,94,.24); font-size: 21px; border: 1px solid rgba(255,255,255,.14); }
.float-btn.contact-tab { writing-mode: vertical-rl; text-orientation: mixed; width: 58px; min-height: 126px; font-size: 14px; font-weight: 900; letter-spacing: .05em; }
.float-btn.light { background: #fff; color: var(--blue-800); border: 1px solid #dbeafe; }
.footer { background: #03162f; color: rgba(255,255,255,.72); padding: 24px 0; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }

@media (max-width: 1040px) {
  .nav-links { position: fixed; top: 76px; left: 0; right: 0; background: #fff; display: none; flex-direction: column; align-items: stretch; padding: 18px 24px 24px; box-shadow: 0 20px 40px rgba(15,23,42,.08); }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }
  .cards-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .surface-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 28px, 1180px); }
  .section { padding: 62px 0; }
  .brand { min-width: 0; }
  .brand-logo { width: 52px; }
  .brand-title { font-size: 15px; }
  .brand-sub { display: none; }
  .hero { min-height: 650px; }
  .stats-card { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat { padding: 22px 12px; }
  .cards-grid, .product-grid, .surface-grid, .why-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery figure:first-child { grid-row: auto; }
  .form-grid { grid-template-columns: 1fr; }
  .floating-contact { right: 12px; bottom: 12px; top: auto; transform: none; display: flex; }
  .float-btn { width: 48px; min-height: 48px; border-radius: 14px; }
  .float-btn.contact-tab { writing-mode: horizontal-tb; width: auto; min-height: 48px; padding: 0 14px; }
  .about-badge { position: static; width: auto; margin-top: 14px; }
}