:root {
  --primary: #0E2A47;
  --primary-2: #163A63;
  --blue: #E53935;
  --teal: #FF7043;
  --bg: #F5F8FC;
  --bg-alt: #EEF4FB;
  --text: #1F2A37;
  --muted: #5B6B7E;
  --line: #E3EAF3;
  --white: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(14, 42, 71, 0.08);
  --maxw: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.container.narrow { max-width: 820px; }
.center { text-align: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1.5px solid transparent; transition: all .2s ease; white-space: nowrap;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #1f6ae8; transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.22); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(0,0,0,.15); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-logo { width: 34px; height: 34px; }
.brand-name { font-size: 18px; color: var(--primary); display: flex; flex-direction: column; line-height: 1.05; }
.brand-name i { font-style: normal; font-size: 10px; letter-spacing: 2px; color: var(--muted); font-weight: 600; }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { color: var(--text); font-weight: 500; font-size: 15px; position: relative; padding: 6px 0; }
.nav-links a:hover, .nav-links a.active { color: var(--blue); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--blue); border-radius: 2px;
}
.nav-cta { margin-left: 8px; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--primary); }

/* Hero */
.hero { background: radial-gradient(1200px 600px at 80% -10%, rgba(46,124,246,.18), transparent), linear-gradient(180deg, #0E2A47, #163A63); color: #fff; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; padding: 80px 20px 90px; }
.badge { display: inline-block; padding: 6px 14px; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; font-size: 13px; letter-spacing: 1px; margin-bottom: 18px; }
.hero h1 { font-size: 46px; line-height: 1.15; margin: 0 0 18px; font-weight: 800; }
.hero-sub { font-size: 17px; color: rgba(255,255,255,.85); max-width: 560px; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 40px; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 30px; font-weight: 800; }
.hero-stats span { font-size: 13px; color: rgba(255,255,255,.7); }

.hero-visual { position: relative; height: 360px; }
.orb {
  position: absolute; inset: 40px; border-radius: 50%;
  background: conic-gradient(from 180deg, var(--blue), var(--teal), var(--blue));
  filter: blur(2px); opacity: .9; animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.float-card {
  position: absolute; background: rgba(255,255,255,.95); color: var(--primary);
  padding: 10px 16px; border-radius: 12px; font-weight: 600; font-size: 14px; box-shadow: var(--shadow);
}
.float-card.c1 { top: 30px; left: 0; }
.float-card.c2 { top: 150px; right: 0; }
.float-card.c3 { bottom: 30px; left: 30px; }

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.eyebrow { color: var(--blue); font-weight: 700; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.section-head h2 { font-size: 34px; margin: 10px 0 12px; color: var(--primary); }
.section-head p { color: var(--muted); font-size: 16px; margin: 0; }

/* Product cards (home) */
.product-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.product-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: transform .2s; }
.product-card:hover { transform: translateY(-4px); }
.product-card h3 { font-size: 24px; color: var(--primary); margin: 0 0 6px; }
.product-tag { color: var(--blue); font-weight: 600; margin: 0 0 14px; }
.product-desc { color: var(--muted); margin: 0 0 18px; }
.module-list { list-style: none; padding: 0; margin: 0 0 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.module-list li { position: relative; padding-left: 22px; font-size: 14px; color: var(--text); }
.module-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 800; }

/* Product detail */
.product-detail { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; padding: 40px 0; border-bottom: 1px solid var(--line); }
.product-detail:last-child { border-bottom: none; }
.product-detail-text h2 { font-size: 30px; color: var(--primary); margin: 6px 0; }
.module-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 18px 0 24px; }
.module-item { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.module-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); flex: none; }
.product-detail-visual .visual-box {
  background: linear-gradient(135deg, var(--primary), var(--blue)); color: #fff; border-radius: var(--radius);
  padding: 50px 30px; text-align: center; box-shadow: var(--shadow);
}
.product-detail-visual .visual-box strong { display: block; font-size: 24px; margin-bottom: 8px; }
.product-detail-visual .visual-box span { color: rgba(255,255,255,.8); }

/* Articles */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 36px; }
.chip { padding: 8px 18px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.chip.active, .chip:hover { background: var(--blue); color: #fff; border-color: var(--blue); }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.article-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s; display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(14,42,71,.14); }
.article-cover { height: 170px; background: linear-gradient(135deg, var(--primary), var(--blue)); display: flex; align-items: flex-end; padding: 14px; background-size: cover; background-position: center; }
.article-cover span { background: rgba(255,255,255,.92); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.article-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.article-cat { color: var(--blue); font-size: 13px; font-weight: 700; }
.article-body h3 { font-size: 18px; margin: 0; color: var(--primary); line-height: 1.4; }
.article-body p { color: var(--muted); font-size: 14px; margin: 0; flex: 1; }
.article-date { font-size: 12px; color: #9aa7b5; }
.empty { grid-column: 1/-1; text-align: center; color: var(--muted); padding: 40px; }

/* Article detail */
.article-page { padding: 60px 0 20px; }
.crumb { color: var(--muted); font-size: 14px; margin-bottom: 14px; }
.crumb a:hover { color: var(--blue); }
.article-title { font-size: 38px; color: var(--primary); margin: 0 0 16px; line-height: 1.25; }
.article-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.article-meta .tag { color: var(--teal); }
.article-hero { height: 360px; border-radius: var(--radius); background-size: cover; background-position: center; margin-bottom: 28px; }
.article-content { font-size: 17px; color: #2c3a49; }
.article-content h2 { font-size: 26px; color: var(--primary); margin: 32px 0 14px; }
.article-content h3 { font-size: 21px; color: var(--primary); margin: 26px 0 12px; }
.article-content p { margin: 14px 0; }
.article-content ul, .article-content ol { margin: 14px 0; padding-left: 22px; }
.article-content li { margin: 8px 0; }
.article-content blockquote { border-left: 4px solid var(--blue); background: var(--bg-alt); margin: 20px 0; padding: 14px 20px; border-radius: 0 12px 12px 0; color: var(--primary-2); font-weight: 500; }
.article-content code { background: var(--bg-alt); padding: 2px 6px; border-radius: 6px; font-size: 14px; }
.article-share { margin: 40px 0; padding: 24px; background: var(--bg-alt); border-radius: var(--radius); display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.article-share span { font-size: 17px; color: var(--primary); font-weight: 600; }

/* Page hero (inner pages) */
.page-hero { background: linear-gradient(180deg, #0E2A47, #163A63); color: #fff; padding: 70px 0 60px; text-align: center; }
.page-hero .eyebrow { color: var(--teal); }
.page-hero h1 { font-size: 40px; margin: 10px 0 12px; }
.page-hero p { color: rgba(255,255,255,.82); font-size: 17px; max-width: 620px; margin: 0 auto; }

/* About */
.about-content p { font-size: 17px; color: #2c3a49; margin: 16px 0; }
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.value-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.value-item h3 { color: var(--primary); margin: 0 0 8px; font-size: 19px; }
.value-item p { color: var(--muted); margin: 0; font-size: 15px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; }
.contact-info h3 { color: var(--primary); font-size: 22px; margin: 0 0 18px; }
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.info-list strong { width: 56px; color: var(--muted); font-weight: 600; }
.info-list span { color: var(--text); }
.info-note { margin-top: 20px; padding: 16px; background: var(--bg-alt); border-radius: 12px; color: var(--muted); font-size: 14px; }
.contact-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 16px; }
.contact-form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary); }
.contact-form input, .contact-form textarea {
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 15px; font-family: inherit; color: var(--text); resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--blue); }
.alert { padding: 12px 16px; border-radius: 10px; font-size: 14px; }
.alert-success { background: #e7f8f3; color: #0a7c63; border: 1px solid #b7e6d8; }

/* CTA band */
.cta-band { background: linear-gradient(135deg, var(--primary), var(--blue)); color: #fff; padding: 64px 0; }
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: 32px; margin: 0 0 10px; }
.cta-inner p { color: rgba(255,255,255,.85); font-size: 17px; margin: 0 0 24px; }

/* Footer */
.site-footer { background: #0A1F37; color: #cdd9e6; padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 30px; }
.footer-brand .brand-name { color: #fff; }
.footer-slogan { color: var(--teal); font-weight: 700; margin: 14px 0 10px; }
.footer-intro { font-size: 14px; color: #9fb0c2; margin: 0; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 15px; margin: 0 0 14px; }
.footer-col a, .footer-col p { display: block; color: #9fb0c2; font-size: 14px; margin: 8px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 20px; font-size: 13px; color: #7e90a3; }

/* Responsive */
@media (max-width: 900px) {
  .hero-inner, .product-cards, .product-detail, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr 1fr; }
  .values { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 34px; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 20px; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; margin-left: auto; }
  .nav-cta { display: none; }
}
@media (max-width: 600px) {
  .article-grid, .case-grid, .module-list, .module-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 22px; }
  .section, .cta-band { padding: 56px 0; }
  .article-title { font-size: 28px; }
}

/* Cases */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.case-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); transition: transform .2s;
  display: flex; flex-direction: column; gap: 18px;
}
.case-card:hover { transform: translateY(-4px); }
.case-industry {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: var(--bg-alt); color: var(--blue); font-size: 12px; font-weight: 700;
}
.case-card h3 { font-size: 24px; color: var(--primary); margin: 0; }
.case-card > p { color: var(--muted); margin: 0; font-size: 15px; }
.case-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
  background: var(--bg-alt); border-radius: 12px; padding: 16px;
}
.metric-item { text-align: center; }
.metric-item strong { display: block; font-size: 22px; color: var(--blue); font-weight: 800; }
.metric-item span { font-size: 12px; color: var(--muted); }
.case-body { font-size: 15px; color: #2c3a49; }
.case-body h2 { font-size: 20px; color: var(--primary); margin: 18px 0 10px; }
.case-body h3 { font-size: 17px; color: var(--primary); margin: 14px 0 8px; }
.case-body p { margin: 10px 0; }
.case-body ul { margin: 10px 0; padding-left: 20px; }
.case-body li { margin: 6px 0; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.case-tags .tag {
  padding: 4px 10px; border-radius: 999px; background: var(--bg-alt);
  color: var(--muted); font-size: 12px;
}

@media (max-width: 900px) {
  .case-grid { grid-template-columns: 1fr; }
  .case-metrics { grid-template-columns: 1fr 1fr; }
}