/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: #1a1a2e; background: #ffffff; line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: #f8f9fc; }
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); border-bottom: 1px solid #eef0f5; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 40px; height: 40px; border-radius: 10px; background: linear-gradient(135deg, #2563eb, #1e40af); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 20px; }
.logo h1 { font-size: 20px; font-weight: 700; color: #1a1a2e; }
.logo-sub { font-size: 11px; color: #888; letter-spacing: 1px; }
.nav { display: flex; gap: 28px; }
.nav a { font-size: 15px; color: #555; transition: color 0.2s; font-weight: 500; position: relative; }
.nav a::after { content: ''; position: absolute; bottom: -4px; left: 0; right: 0; height: 2px; background: #2563eb; transform: scaleX(0); transition: transform 0.2s; border-radius: 1px; }
.nav a:hover { color: #2563eb; }
.nav a:hover::after { transform: scaleX(1); }
.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: #333; }
.mobile-menu { display: none; position: fixed; top: 68px; left: 0; right: 0; z-index: 99; background: #fff; border-bottom: 1px solid #eef0f5; padding: 16px 24px; flex-direction: column; gap: 12px; }
.mobile-menu.open { display: flex; }
.mobile-link { padding: 8px 0; font-size: 16px; color: #555; font-weight: 500; }
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; padding-top: 68px; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #2563eb 100%); }
.hero-bg::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(37,99,235,0.3) 0%, transparent 50%), radial-gradient(circle at 70% 30%, rgba(59,130,246,0.2) 0%, transparent 50%), radial-gradient(circle at 50% 80%, rgba(99,102,241,0.15) 0%, transparent 50%); }
.hero-content { position: relative; z-index: 1; color: #fff; text-align: center; }
.hero-title { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; letter-spacing: 2px; margin-bottom: 12px; }
.hero-subtitle { font-size: clamp(1.2rem, 2.5vw, 1.8rem); font-weight: 600; color: #93c5fd; margin-bottom: 20px; }
.hero-desc { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 36px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px; border-radius: 8px; font-size: 16px; font-weight: 600; transition: all 0.25s; cursor: pointer; }
.btn-primary { background: #2563eb; color: #fff; border: none; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-2px); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.section-header { text-align: center; margin-bottom: 52px; }
.section-tag { display: inline-block; padding: 4px 16px; border-radius: 20px; background: #dbeafe; color: #2563eb; font-size: 12px; font-weight: 600; letter-spacing: 2px; margin-bottom: 12px; }
.section-header h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; margin-bottom: 12px; }
.section-desc { color: #777; font-size: 16px; }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.about-card { background: #fff; border-radius: 16px; padding: 36px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.3s, box-shadow 0.3s; text-align: center; }
.about-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
.about-icon { font-size: 40px; margin-bottom: 16px; }
.about-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: #1a1a2e; }
.about-card p { font-size: 15px; color: #666; line-height: 1.8; }
.business-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.feature-card { background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.3s; }
.feature-card:hover { transform: translateY(-4px); }
.feature-icon { font-size: 36px; margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: #1a1a2e; }
.feature-card p { font-size: 14px; color: #666; line-height: 1.8; }
.partner-group { margin-bottom: 24px; }
.partner-group-title { font-size: 16px; font-weight: 600; color: #333; margin-bottom: 12px; }
.partner-list { display: flex; flex-wrap: wrap; gap: 10px; }
.partner-tag { padding: 8px 18px; border-radius: 8px; background: #f0f4ff; color: #2563eb; font-size: 14px; font-weight: 500; border: 1px solid #dbeafe; transition: all 0.2s; }
.partner-tag:hover { background: #dbeafe; transform: translateY(-1px); }
.platform-intro { background: linear-gradient(135deg, #f0f4ff, #e8f0fe); border-radius: 12px; padding: 28px 32px; margin-bottom: 36px; border-left: 4px solid #2563eb; }
.platform-intro p { font-size: 15px; color: #444; line-height: 1.8; }
.platform-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 40px; }
.pf-card { background: #fff; border-radius: 12px; padding: 24px; box-shadow: 0 2px 12px rgba(0,0,0,0.05); transition: transform 0.3s; }
.pf-card:hover { transform: translateY(-3px); }
.pf-num { font-size: 28px; font-weight: 800; color: #dbeafe; margin-bottom: 8px; line-height: 1; }
.pf-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: #1a1a2e; }
.pf-card p { font-size: 13px; color: #666; line-height: 1.7; }
.platform-cases h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; text-align: center; }
.case-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.case-tag { padding: 6px 16px; border-radius: 20px; background: #f8f9fc; color: #444; font-size: 13px; border: 1px solid #e5e7eb; }
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; }
.value-item { background: #fff; border-radius: 12px; padding: 28px 20px; text-align: center; box-shadow: 0 2px 12px rgba(0,0,0,0.05); transition: transform 0.3s; }
.value-item:hover { transform: translateY(-3px); }
.value-icon { font-size: 32px; margin-bottom: 10px; }
.value-item h4 { font-size: 15px; font-weight: 600; color: #1a1a2e; }
.asset-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 28px; margin-bottom: 36px; }
.asset-card { background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.3s; }
.asset-card:hover { transform: translateY(-4px); }
.asset-card.highlight { border: 2px solid #2563eb; position: relative; background: linear-gradient(135deg, #f0f4ff, #fff); }

.asset-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.asset-card ul { margin-bottom: 16px; }
.asset-card li { position: relative; padding-left: 20px; margin-bottom: 8px; font-size: 14px; color: #555; }
.asset-card li::before { content: '\2022'; position: absolute; left: 4px; color: #2563eb; font-weight: 700; }
.asset-metrics { display: flex; gap: 16px; flex-wrap: wrap; }
.asset-metrics span { background: #f0f4ff; padding: 6px 14px; border-radius: 8px; font-size: 13px; color: #444; }
.asset-metrics strong { color: #2563eb; }
.cost-comparison { text-align: center; background: linear-gradient(135deg, #f0f4ff, #e8f0fe); border-radius: 12px; padding: 28px; }
.cost-comparison h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.text-accent { color: #2563eb; }
.cost-comparison p { font-size: 14px; color: #666; }
.advantages-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.adv-card { background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s; }
.adv-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
.adv-icon { font-size: 36px; margin-bottom: 14px; }
.adv-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: #1a1a2e; }
.adv-card p { font-size: 14px; color: #666; line-height: 1.8; }
.adv-meta { margin-top: 8px; font-size: 13px !important; color: #2563eb !important; font-weight: 500; }
.contact-grid { max-width: 600px; margin: 0 auto; }
.contact-info { display: flex; flex-direction: column; gap: 16px; margin-bottom: 28px; }
.contact-item { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; background: #f8f9fc; border-radius: 10px; }
.contact-label { font-size: 14px; font-weight: 600; color: #888; }
.contact-value { font-size: 15px; color: #1a1a2e; font-weight: 500; text-align: right; }
.contact-note { text-align: center; padding: 24px; background: linear-gradient(135deg, #2563eb, #1e40af); border-radius: 12px; color: #fff; }
.contact-note p { font-size: 16px; font-weight: 500; }
.footer { background: #0f172a; color: rgba(255,255,255,0.6); padding: 32px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer p { font-size: 14px; }
.footer-icp a { color: rgba(255,255,255,0.5); font-size: 13px; }
.footer-icp a:hover { color: #fff; }
@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-menu-btn { display: block; }
    .section { padding: 56px 0; }
    .contact-item { flex-direction: column; align-items: flex-start; gap: 4px; }
    .contact-value { text-align: left; }
    .footer-inner { flex-direction: column; text-align: center; }
    .hero { min-height: 80vh; }
    .asset-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
}