* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif; font-size: 15px; line-height: 1.7; color: #333; background: #fff; }
a { color: #2563EB; text-decoration: none; transition: all 0.3s; }
a:hover { color: #1D4ED8; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 999; }
.header-inner { padding: 0; }
.header-flex { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { color: #0F2B46; font-size: 24px; }
.logo-text { font-size: 22px; font-weight: 700; color: #0F2B46; letter-spacing: 1px; }
.main-nav ul { display: flex; align-items: center; gap: 8px; }
.main-nav a { display: block; padding: 8px 16px; color: #444; font-size: 15px; border-radius: 4px; }
.main-nav a:hover { color: #2563EB; background: #EFF6FF; }
.main-nav a.nav-cta { background: #2563EB; color: #fff; padding: 10px 24px; margin-left: 12px; border-radius: 4px; }
.main-nav a.nav-cta:hover { background: #1D4ED8; color: #fff; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: #333; margin: 5px 0; transition: 0.3s; }

/* Hero */
.hero { padding: 80px 0; color: #fff; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; right: -200px; top: -200px; width: 600px; height: 600px; border-radius: 50%; background: rgba(255,255,255,0.03); }
.hero-container { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-badge { display: inline-block; background: rgba(255,255,255,0.1); color: #93C5FD; padding: 6px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.15); }
.hero h1 { font-size: 42px; font-weight: 700; line-height: 1.3; margin-bottom: 20px; }
.hero-desc { font-size: 16px; color: rgba(255,255,255,0.8); line-height: 1.8; margin-bottom: 32px; max-width: 560px; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 4px; font-size: 15px; font-weight: 500; cursor: pointer; border: none; transition: all 0.3s; }
.btn-accent { background: #3B82F6; color: #fff; }
.btn-accent:hover { background: #2563EB; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,0.3); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.btn-white { background: #fff; color: #0F2B46; }
.btn-white:hover { background: #f0f0f0; color: #0F2B46; }
.btn-outline-white { background: transparent; color: #fff; border: 1px solid #fff; }
.btn-outline-white:hover { background: #fff; color: #0F2B46; }
.btn-plain { background: #f0f0f0; color: #333; }
.btn-plain:hover { background: #e0e0e0; color: #333; }
.btn-block { width: 100%; }
.hero-stats { display: flex; gap: 40px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); }
.stat-num { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.7); }
.hero-visual img { border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }

/* Platform Bar */
.platform-bar { background: #F8FAFC; padding: 20px 0; border-bottom: 1px solid #E2E8F0; }
.platform-bar .container { display: flex; align-items: center; gap: 30px; }
.platform-bar-title { font-size: 14px; color: #64748B; font-weight: 500; white-space: nowrap; }
.platform-bar-list { display: flex; gap: 12px; flex-wrap: wrap; }
.platform-tag { padding: 6px 16px; background: #fff; border: 1px solid #E2E8F0; border-radius: 4px; font-size: 14px; color: #475569; }

/* Sections */
.section { padding: 80px 0; }
.section-gray { background: #F8FAFC; }
.section-dark { background: linear-gradient(135deg, #0F2B46 0%, #1A497A 100%); color: #fff; }
.section-dark h2 { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.7); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header.light h2 { color: #fff; }
.section-header.light p { color: rgba(255,255,255,0.7); }
.section-subtitle { font-size: 13px; color: #3B82F6; font-weight: 600; letter-spacing: 2px; margin-bottom: 12px; text-transform: uppercase; }
.section-subtitle.left { text-align: left; }
.section-header h2 { font-size: 34px; font-weight: 700; color: #1E293B; margin-bottom: 16px; }
.section-header p { font-size: 16px; color: #64748B; }

/* Service Grid */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 8px; padding: 36px 28px; transition: all 0.3s; }
.service-card:hover { border-color: #3B82F6; box-shadow: 0 12px 32px rgba(37,99,235,0.1); transform: translateY(-4px); }
.service-icon { width: 56px; height: 56px; background: #EFF6FF; border-radius: 8px; color: #2563EB; font-size: 24px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.service-card h3 { font-size: 19px; color: #1E293B; margin-bottom: 12px; }
.service-card p { font-size: 14px; color: #64748B; line-height: 1.7; margin-bottom: 20px; }
.service-more { font-size: 14px; font-weight: 500; color: #2563EB; }
.service-more:hover { color: #1D4ED8; }

/* Platform Detail */
.platform-detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.platform-detail-card { background: #fff; border-radius: 8px; padding: 28px; border: 1px solid #E2E8F0; }
.pd-header { margin-bottom: 16px; }
.pd-badge { display: inline-block; padding: 6px 16px; border-radius: 4px; font-size: 13px; font-weight: 500; color: #fff; }
.bg-red { background: #FE2C55; }
.bg-orange { background: #FF7800; }
.bg-pink { background: #FF2442; }
.bg-green { background: #07C160; }
.bg-blue { background: #00A1D6; }
.bg-purple { background: #8B5CF6; }
.platform-detail-card h4 { font-size: 18px; color: #1E293B; margin-bottom: 16px; }
.pd-list li { padding: 8px 0; font-size: 14px; color: #475569; padding-left: 20px; position: relative; border-bottom: 1px dashed #F1F5F9; }
.pd-list li:last-child { border-bottom: none; }
.pd-list li::before { content: "•"; position: absolute; left: 0; color: #3B82F6; font-weight: bold; }

/* Process */
.process-flow { display: flex; max-width: 1000px; margin: 0 auto; position: relative; }
.process-item { flex: 1; text-align: center; padding: 0 15px; position: relative; }
.process-dot { width: 56px; height: 56px; background: #2563EB; color: #fff; border-radius: 50%; font-size: 22px; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; position: relative; z-index: 2; }
.process-line { position: absolute; top: 28px; left: 50%; width: 100%; height: 2px; background: #DBEAFE; z-index: 1; }
.process-item:last-child .process-line { display: none; }
.process-item h3 { font-size: 18px; color: #1E293B; margin-bottom: 10px; }
.process-item p { font-size: 14px; color: #64748B; line-height: 1.7; }

/* Why */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.why-item { text-align: center; }
.why-num { font-size: 42px; font-weight: 700; color: rgba(59,130,246,0.3); margin-bottom: 16px; }
.why-item h3 { font-size: 18px; color: #fff; margin-bottom: 12px; }
.why-item p { font-size: 14px; line-height: 1.8; }

/* News */
ul.article-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; list-style: none; margin: 0; padding: 0; width: 100%; box-sizing: border-box; }
ul.article-cards > li.article-card { min-width: 0; width: auto; max-width: none; margin: 0; float: none; box-sizing: border-box; background: #fff; border-radius: 8px; overflow: hidden; border: 1px solid #E2E8F0; transition: all 0.3s; }
ul.article-cards > li.article-card:hover { box-shadow: 0 12px 32px rgba(0,0,0,0.08); transform: translateY(-4px); }
.article-card .card-thumb { width: 100%; overflow: hidden; aspect-ratio: 16/9; }
.article-card .card-thumb img { display: block; width: 100%; max-width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.article-card:hover .card-thumb img { transform: scale(1.08); }
.article-card .card-body { padding: 20px; }
.article-card .card-title { overflow-wrap: anywhere; font-size: 16px; font-weight: 600; color: #1E293B; margin-bottom: 10px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card .card-title a { color: #1E293B; }
.article-card .card-title a:hover { color: #2563EB; }
.article-card .card-date { display: block; font-size: 13px; color: #94A3B8; margin-bottom: 8px; }
.article-card .card-summary { overflow-wrap: anywhere; font-size: 14px; color: #64748B; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* FAQ */
.faq-container { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.faq-item { background: #fff; border-radius: 8px; margin-bottom: 16px; border: 1px solid #E2E8F0; overflow: hidden; }
.faq-q { padding: 20px 24px; font-size: 15px; font-weight: 600; color: #1E293B; cursor: pointer; position: relative; padding-right: 50px; }
.faq-q::after { content: "﹀"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%); color: #2563EB; font-size: 14px; transition: transform 0.3s; }
.faq-item.active .faq-q::after { transform: translateY(-50%) rotate(180deg); }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; font-size: 14px; color: #64748B; line-height: 1.8; transition: all 0.3s; border-top: 0 solid #F1F5F9; }
.faq-item.active .faq-a { padding: 0 24px 20px; max-height: 500px; border-top-width: 1px; }

/* About */
.about-wrap { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: start; }
.about-text h2 { font-size: 32px; color: #1E293B; margin-bottom: 24px; }
.about-text p { font-size: 15px; color: #475569; margin-bottom: 16px; line-height: 1.8; }
.about-features { display: flex; gap: 24px; margin-top: 28px; flex-wrap: wrap; }
.about-features span { font-size: 14px; color: #2563EB; font-weight: 500; }
.info-card { background: #F8FAFC; border-radius: 8px; padding: 32px; border: 1px solid #E2E8F0; }
.info-card h3 { font-size: 20px; color: #1E293B; margin-bottom: 24px; }
.info-line { padding: 12px 0; font-size: 14px; color: #475569; border-bottom: 1px solid #E2E8F0; }
.info-line:last-of-type { border-bottom: none; margin-bottom: 24px; }
.info-line strong { color: #1E293B; margin-right: 8px; }
.info-line a { color: #2563EB; font-weight: 600; }

/* CTA Section */
.section-cta { background: #F8FAFC; }
.cta-box { background: #fff; border-radius: 12px; padding: 50px; box-shadow: 0 4px 24px rgba(0,0,0,0.06); display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: start; }
.cta-text h2 { font-size: 28px; color: #1E293B; margin-bottom: 12px; }
.cta-text p { font-size: 15px; color: #64748B; line-height: 1.8; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-item { display: flex; flex-direction: column; }
.form-item.full { grid-column: 1 / -1; }
.form-item input, .form-item select, .form-item textarea { padding: 12px 16px; border: 1px solid #CBD5E1; border-radius: 4px; font-size: 15px; font-family: inherit; transition: border-color 0.2s; width: 100%; }
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { outline: none; border-color: #2563EB; }
.form-item textarea { resize: vertical; }

/* Article Detail */
.page-banner { background: linear-gradient(135deg, #0F2B46 0%, #1A497A 100%); padding: 40px 0; color: #fff; }
.page-banner h1 { font-size: 28px; margin-bottom: 10px; }
.page-banner a { color: rgba(255,255,255,0.7); }
.page-banner a:hover { color: #fff; }
.article-page { padding: 50px 0 80px; }
.article-wrap { max-width: 800px; margin: 0 auto; }
.article-head { margin-bottom: 24px; }
.article-head h1 { font-size: 30px; font-weight: 700; color: #1E293B; line-height: 1.4; margin-bottom: 16px; }
.article-meta-info { font-size: 14px; color: #94A3B8; }
.article-meta-info span { margin-right: 20px; }
.article-date { display: none; }
.article-summary-box { padding: 20px 24px; background: #F8FAFC; border-left: 4px solid #2563EB; border-radius: 0 4px 4px 0; margin-bottom: 30px; font-size: 15px; color: #475569; line-height: 1.8; }
.article-cover-img { margin-bottom: 30px; border-radius: 8px; overflow: hidden; }
.article-cover-img img { width: 100%; }
.article-body { font-size: 16px; line-height: 1.9; color: #334155; margin-bottom: 50px; }
.article-body p { margin-bottom: 20px; }
.article-body h2 { font-size: 24px; color: #1E293B; margin: 30px 0 16px; }
.article-body h3 { font-size: 20px; color: #1E293B; margin: 24px 0 12px; }
.article-body img { border-radius: 6px; margin: 24px 0; }
.article-service-box { background: #F8FAFC; border-radius: 8px; padding: 40px; text-align: center; }
.article-service-box h3 { font-size: 22px; color: #1E293B; margin-bottom: 12px; }
.article-service-box p { color: #64748B; margin-bottom: 24px; }
.service-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer { background: #0F172A; color: #94A3B8; }
.footer-top { padding: 50px 0; background: #1E293B; border-bottom: 1px solid #334155; }
.footer-cta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-cta-text h3 { font-size: 24px; color: #fff; margin-bottom: 8px; }
.footer-cta-text p { font-size: 15px; color: #94A3B8; }
.footer-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.footer-main { padding: 60px 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
.footer-logo { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.brand-col p { font-size: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 24px; font-weight: 600; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { color: #94A3B8; font-size: 14px; }
.footer-col ul li a:hover { color: #fff; }
.contact-list li { font-size: 14px; margin-bottom: 10px; }
.contact-list a { color: #60A5FA; font-weight: 600; }
.friend-links { margin-top: 20px; padding-top: 20px; border-top: 1px solid #334155; font-size: 13px; line-height: 2; }
.friend-links a { color: #64748B; margin-right: 12px; }
.friend-links a:hover { color: #fff; }
.footer-bottom { padding: 24px 0; border-top: 1px solid #334155; font-size: 13px; text-align: center; color: #64748B; }
.footer-bottom a { color: #64748B; }
.footer-bottom a:hover { color: #fff; }

/* Responsive */
@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-detail-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav { position: fixed; top: 72px; left: -100%; width: 280px; height: calc(100vh - 72px); background: #fff; box-shadow: 2px 0 10px rgba(0,0,0,0.1); transition: left 0.3s; padding: 20px; z-index: 999; }
  .main-nav.open { left: 0; }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav a { padding: 14px 10px; border-bottom: 1px solid #F1F5F9; }
  .main-nav a.nav-cta { margin-left: 0; margin-top: 12px; text-align: center; }
  .menu-toggle { display: block; }
  .hero { padding: 50px 0; }
  .hero-container { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 28px; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .platform-bar .container { flex-direction: column; align-items: flex-start; gap: 12px; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 26px; }
  .service-grid { grid-template-columns: 1fr; }
  .platform-detail-grid { grid-template-columns: 1fr; }
  .process-flow { flex-direction: column; gap: 30px; }
  .process-line { display: none; }
  .why-grid { grid-template-columns: 1fr; gap: 30px; }
  .faq-container { grid-template-columns: 1fr; gap: 0; }
  .about-wrap { grid-template-columns: 1fr; gap: 30px; }
  .cta-box { grid-template-columns: 1fr; padding: 30px 24px; gap: 30px; }
  .form-grid { grid-template-columns: 1fr; gap: 12px; }
  .footer-cta { flex-direction: column; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .article-head h1 { font-size: 24px; }
  .article-service-box { padding: 30px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}