:root {
  --bg: #eef7ff;
  --panel: #ffffff;
  --text: #102033;
  --muted: #637083;
  --brand: #0088cc;
  --brand-dark: #006fa8;
  --accent: #7dd3fc;
  --line: rgba(0, 136, 204, 0.16);
  --shadow: 0 22px 70px rgba(0, 80, 140, 0.14);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 16% 18%, rgba(125, 211, 252, 0.34), transparent 28%),
    radial-gradient(circle at 82% 8%, rgba(0, 136, 204, 0.18), transparent 26%),
    linear-gradient(180deg, #e0f2fe 0%, #f5e6ff 100%);
}
a { color: inherit; text-decoration: none; }
p { color: var(--muted); line-height: 1.75; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(42px, 6vw, 76px); line-height: 0.98; letter-spacing: -0.06em; margin-bottom: 22px; }
h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.08; letter-spacing: -0.04em; margin-bottom: 16px; }
h3 { font-size: 22px; margin-bottom: 10px; }

.site-header, main, .site-footer { width: min(1180px, calc(100% - 36px)); margin-inline: auto; }
.site-header {
  position: sticky; top: 16px; z-index: 20; margin-top: 16px; padding: 14px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  background: rgba(255, 255, 255, 0.88); border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px; box-shadow: 0 18px 50px rgba(15, 45, 80, 0.1); backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-icon, .plane-mark {
  display: grid; place-items: center; color: white; background: linear-gradient(145deg, #1fb3f3, var(--brand));
  box-shadow: inset 0 5px 12px rgba(255,255,255,.28), inset 0 -8px 18px rgba(0,0,0,.15), 0 18px 35px rgba(0,136,204,.32);
}
.brand-icon { width: 52px; height: 52px; border-radius: 50%; font-size: 25px; }
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); font-size: 12px; margin-top: 4px; }
.main-nav { display: flex; align-items: center; gap: 6px; font-size: 15px; }
.main-nav a { padding: 10px 12px; border-radius: 999px; }
.main-nav a:hover { color: white; background: var(--brand); }
.header-cta, .btn, .product-footer a { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border-radius: 999px; font-weight: 800; }
.header-cta, .primary, .product-footer a { color: white; background: linear-gradient(145deg, #13a8ed, var(--brand)); box-shadow: 0 16px 32px rgba(0, 136, 204, 0.28); }
.secondary { color: var(--brand); background: white; border: 1px solid var(--line); }

.hero { min-height: 660px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; padding: 88px 0 64px; }
.eyebrow { color: var(--brand); font-weight: 900; letter-spacing: .08em; text-transform: uppercase; font-size: 13px; margin-bottom: 14px; }
.hero-text, .lead { max-width: 720px; font-size: 19px; }
.hero-actions, .contact-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-card { position: relative; padding: 44px; min-height: 400px; display: flex; flex-direction: column; justify-content: center; border-radius: 44px; background: rgba(255,255,255,.76); border: 1px solid rgba(255,255,255,.92); box-shadow: var(--shadow); overflow: hidden; }
.hero-card:after { content: ""; position: absolute; width: 260px; height: 260px; right: -88px; bottom: -80px; border-radius: 50%; background: rgba(0,136,204,.12); }
.plane-mark { width: 132px; height: 132px; border-radius: 34px; font-size: 72px; margin-bottom: 28px; }
.hero-card strong { font-size: 30px; letter-spacing: -.03em; }

.trust-strip, .product-grid, .advice-grid, .detail-grid, .contact-page-grid { display: grid; gap: 18px; }
.trust-strip { grid-template-columns: repeat(4, 1fr); margin-bottom: 78px; }
.trust-strip div, .product-card, .info-list article, .advice-grid article, .detail-grid section, .process-steps article, .faq-list article, .contact-page-grid article, .static-form-note, .contact-panel {
  background: rgba(255,255,255,.82); border: 1px solid rgba(255,255,255,.9); border-radius: var(--radius); box-shadow: var(--shadow); backdrop-filter: blur(16px);
}
.trust-strip div { padding: 22px; }
.trust-strip strong, .trust-strip span { display: block; }
.trust-strip span { color: var(--muted); margin-top: 6px; }

.product-showcase, .content-section, .page-hero, .product-detail, .process-steps, .faq-list, .contact-page-grid, .static-form-note, .contact-panel { margin: 90px 0; }
.section-heading { max-width: 740px; margin-bottom: 34px; }
.product-grid { grid-template-columns: repeat(3, 1fr); }
.product-card { padding: 30px; }
.product-badge { display: inline-flex; padding: 7px 12px; border-radius: 999px; background: rgba(0,136,204,.1); color: var(--brand); font-size: 13px; font-weight: 900; margin-bottom: 18px; }
.product-card ul { padding-left: 20px; color: var(--muted); line-height: 1.8; }
.product-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 24px; }
.product-footer strong { font-size: 22px; }

.two-column { display: grid; grid-template-columns: .95fr 1.05fr; gap: 38px; align-items: start; }
.info-list { display: grid; gap: 16px; }
.info-list article, .advice-grid article, .detail-grid section { padding: 26px; }
.compact { max-width: 820px; padding-top: 74px; }
.compact h1 { font-size: clamp(38px, 5vw, 64px); }
.advice-grid, .contact-page-grid { grid-template-columns: repeat(3, 1fr); }
.detail-grid { grid-template-columns: repeat(2, 1fr); margin-top: 34px; }
.product-detail { max-width: 980px; }
.product-detail ul, .detail-grid ul { color: var(--muted); line-height: 1.9; }
.text-link { display: inline-flex; margin-top: 28px; color: var(--brand); font-weight: 900; }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.process-steps article, .faq-list article { padding: 26px; }
.process-steps span { display: inline-flex; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 50%; color: white; background: var(--brand); font-weight: 900; margin-bottom: 18px; }
.faq-list { display: grid; gap: 18px; }
.contact-page-grid { grid-template-columns: repeat(2, 1fr); }
.contact-page-grid article, .static-form-note { padding: 32px; }
.contact-panel { padding: 40px; display: flex; align-items: center; justify-content: space-between; gap: 26px; }

/* Product detail page */
.product-detail-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; margin: 34px 0; align-items: start; }
.product-detail h1 { font-size: 20px !important; line-height: 1.35 !important; letter-spacing: -0.02em !important; }
.product-gallery img { width: 100%; height: auto; border-radius: 28px; }
.product-info { display: flex; flex-direction: column; gap: 16px; }
.product-specs { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.spec-tag { padding: 8px 14px; border-radius: 999px; background: rgba(0,136,204,.08); color: var(--brand); font-size: 14px; font-weight: 700; }
.product-price strong { font-size: 28px; }
.buy-button { width: fit-content; min-width: 200px; font-size: 17px; cursor: pointer; border: none; }
.buy-note { font-size: 13px; color: var(--muted); margin-top: -4px; }
.product-description { margin-top: 38px; }
.product-description p { margin-bottom: 18px; line-height: 1.9; }
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 22px; padding: 0; }
.breadcrumb a { color: var(--brand); }

/* Blog pages */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.blog-card, .case-card { padding: 30px; background: rgba(255,255,255,.82); border: 1px solid rgba(255,255,255,.9); border-radius: var(--radius); box-shadow: var(--shadow); }
.blog-meta { color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.blog-detail-shell { display: grid; grid-template-columns: minmax(0, 4fr) minmax(220px, 1fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.blog-detail { max-width: 1180px; margin: 40px auto; }
.blog-main h2 { font-size: 28px; margin-top: 36px; }
.blog-main p { line-height: 1.9; margin-bottom: 18px; }
.blog-sidebar {
  position: sticky; top: 96px; border-radius: 24px; padding: 24px;
  background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(0,136,204,.08));
  border: 1px solid rgba(0,136,204,.15); box-shadow: 0 16px 48px rgba(0,0,0,.08);
}
.blog-sidebar h3 { font-size: 16px; margin-bottom: 10px; }
.blog-sidebar ul { list-style: none; padding: 0; }
.blog-sidebar li { margin-bottom: 8px; }
.blog-sidebar a { color: var(--brand); font-size: 14px; }

/* Case studies */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.case-badge { display: inline-flex; padding: 6px 12px; border-radius: 999px; background: rgba(0,136,204,.1); color: var(--brand); font-size: 13px; font-weight: 800; margin-bottom: 12px; }
.case-result { padding: 14px; border-radius: 16px; background: rgba(0,136,204,.06); border-left: 3px solid var(--brand); }

/* Related section */
.related-section { margin-top: 48px; padding: 32px; border-radius: var(--radius); background: rgba(255,255,255,.5); }
.related-section h2 { font-size: 24px; margin-bottom: 20px; }
.related-section .product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 14px; }
.related-card { padding: 16px; }
.related-card .product-icon { width: 44px; height: 44px; margin-bottom: 8px; border-radius: 14px; }
.related-card .product-icon img { width: 24px; height: 24px; }
.related-card h4 { font-size: 14px; line-height: 1.3; margin-bottom: 6px; }
.related-card .tag { font-size: 11px; padding: 3px 7px; margin-bottom: 4px; }
.related-card .card-btn { min-height: 32px; font-size: 12px; padding: 0 12px; }

/* Error page */
.error-page .hero-actions { justify-content: center; }

@media (max-width: 900px) {
  .product-detail-grid, .blog-detail-shell, .blog-grid, .case-grid { grid-template-columns: 1fr; }
  .blog-sidebar { position: static; }
}

.site-footer { margin-top: 70px; padding: 34px 0 48px; display: grid; grid-template-columns: 1.4fr .7fr 1fr; gap: 24px; color: var(--muted); }
.footer-links, .footer-contact { display: grid; gap: 10px; }
.site-footer a { color: var(--brand); font-weight: 800; }

@media (max-width: 980px) {
  .site-header { align-items: stretch; border-radius: 28px; flex-direction: column; }
  .main-nav { display: grid; grid-template-columns: repeat(2, 1fr); }
  .hero, .trust-strip, .product-grid, .two-column, .advice-grid, .detail-grid, .process-steps, .contact-page-grid, .site-footer { grid-template-columns: 1fr; }
  .contact-panel { align-items: stretch; flex-direction: column; }
}
@media (max-width: 560px) {
  .site-header, main, .site-footer { width: min(100% - 24px, 1180px); }
  .main-nav { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
  .hero-card { padding: 30px; }
}