/* ===========================
   托管易 - 响应式网站样式
   =========================== */

/* CSS Variables */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #DBEAFE;
  --accent: #F97316;
  --accent-dark: #EA580C;
  --bg: #FFFFFF;
  --bg-gray: #F8FAFC;
  --bg-blue: #EFF6FF;
  --text: #1E293B;
  --text-secondary: #64748B;
  --text-light: #94A3B8;
  --border: #E2E8F0;
  --success: #10B981;
  --danger: #EF4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 800px; margin: 0 auto; padding: 0 20px; }

/* Typography */
h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.2; }
h2 { font-size: 2rem; font-weight: 700; line-height: 1.3; }
h3 { font-size: 1.25rem; font-weight: 600; }
.section-title { text-align: center; margin-bottom: 12px; }
.section-subtitle { text-align: center; color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 48px; max-width: 600px; margin-left: auto; margin-right: auto; }
.text-center { text-align: center; }
.img-fluid{width: 100%!important;height: 80%!important}
/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--radius); font-size: 1rem;
  font-weight: 600; cursor: pointer; transition: all 0.2s;
  border: 2px solid transparent; gap: 8px; text-decoration: none;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); font-size: 1.1rem; padding: 14px 36px; }
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn-lg { padding: 16px 40px; font-size: 1.15rem; border-radius: var(--radius-lg); }
.btn-block { width: 100%; }

/* Navigation */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border); z-index: 1000;
  display: flex; align-items: center;
}
.nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-logo { font-size: 1.5rem; font-weight: 800; color: var(--text) !important; display: flex; align-items: center; gap: 8px; }
.nav-logo span { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* Hero */
.hero {
  padding: calc(var(--nav-height) + 60px) 0 80px;
  background: linear-gradient(135deg, var(--bg-blue) 0%, #F0F9FF 50%, #FFF 100%);
  text-align: center;
}
.hero h1 { font-size: 3rem; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 span { color: var(--primary); }
.hero .hero-subtitle { font-size: 1.2rem; color: var(--text-secondary); max-width: 650px; margin: 0 auto 32px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.hero-trust { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; font-size: 0.85rem; color: var(--text-light); }
.hero-trust span::before { content: "\2705 "; }

/* Section */
.section { padding: 80px 0; }
.section-gray { background: var(--bg-gray); }
.section-blue { background: var(--bg-blue); }

/* Pain Points */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 40px; }
.pain-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; transition: box-shadow 0.2s; }
.pain-card:hover { box-shadow: var(--shadow-lg); }
.pain-card .pain-icon { font-size: 2.5rem; margin-bottom: 12px; }
.pain-card h3 { margin-bottom: 8px; }
.pain-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.pain-bottom { text-align: center; font-size: 1.3rem; font-weight: 700; color: var(--accent); }

/* Value Props */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.value-card { text-align: center; padding: 40px 24px; background: #fff; border-radius: var(--radius-xl); border: 1px solid var(--border); transition: transform 0.2s, box-shadow 0.2s; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value-card .value-icon { font-size: 3rem; margin-bottom: 16px; }
.value-card h3 { margin-bottom: 12px; font-size: 1.2rem; }
.value-card ul { color: var(--text-secondary); font-size: 0.95rem; line-height: 2; }

/* Feature Blocks */
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 32px 0; border-bottom: 1px solid var(--border); }
.feature-block:last-child { border-bottom: none; }
.feature-content h3 { font-size: 1.4rem; margin-bottom: 4px; display: flex; align-items: center; gap: 10px; }
.feature-content .feature-tagline { color: var(--text-secondary); margin-bottom: 16px; font-size: 0.95rem; }
.feature-content ul { margin-top: 16px; }
.feature-content ul li { padding: 8px 0; padding-left: 24px; position: relative; color: var(--text-secondary); font-size: 0.95rem; }
.feature-content ul li::before { content: "\00B7"; position: absolute; left: 8px; font-weight: 700; color: var(--primary); font-size: 1.3rem; top: 6px; }
.feature-image { background: var(--bg-blue); border-radius: var(--radius-lg); min-height: 280px; display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 5rem; }

/* Feature page blocked layout */
.feature-page-block { padding: 48px 0; border-bottom: 1px solid var(--border); }
.feature-page-block:last-child { border-bottom: none; }
.feature-page-block .container-sm { display: flex; flex-direction: column; gap: 20px; }
.feature-page-block h2 { display: flex; align-items: center; gap: 12px; font-size: 1.6rem; }
.feature-page-block .feat-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.feature-page-block .feat-item { padding: 16px; background: var(--bg-gray); border-radius: var(--radius);}
.feature-page-block .feat-item strong { display: block; margin-bottom: 4px; }
.feature-page-block .feat-item p { color: var(--text-secondary); font-size: 0.9rem; margin: 0;}
.feature-page-block .feat-scene { padding: 16px; background: var(--bg-blue); border-radius: var(--radius); border-left: 4px solid var(--primary); font-style: italic; color: var(--text-secondary); }

/* Compare Table */
.compare-table { width: 100%; border-collapse: collapse; margin: 40px 0; font-size: 0.95rem;}
.compare-table th, .compare-table td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border);}
.compare-table th { background: var(--primary); color: #fff; font-weight: 600;}
.compare-table th:first-child { border-radius: var(--radius) 0 0 0;}
.compare-table th:last-child { border-radius: 0 var(--radius) 0 0;}
.compare-table td:first-child { font-weight: 600; }
.compare-table tr:nth-child(even) td { background: var(--bg-gray);}
.compare-table .highlight-col { background: var(--bg-blue) !important;}

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; max-width: 900px; margin: 0 auto 32px;}
.pricing-card { background: #fff; border: 2px solid var(--border); border-radius: var(--radius-xl); padding: 40px 32px;text-align: center; position: relative; transition: transform 0.2s, box-shadow 0.2s; }
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-card.featured { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.pricing-card .original-price { text-decoration: line-through; color: var(--text-light); font-size: 1.1rem; }
.pricing-card .sale-price { font-size: 3rem; font-weight: 800; color: var(--primary); margin: 8px 0; }
.pricing-card .sale-price small { font-size: 1rem; font-weight: 400; color: var(--text-secondary); }
.pricing-card .daily { color: var(--text-light); font-size: 0.85rem; margin-bottom: 16px; }
.pricing-card .target { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 24px; padding: 8px 16px; background: var(--bg-gray); border-radius: var(--radius); display: inline-block; }

/* Featured tag on card */
.pricing-card .featured-tag {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff; font-size: 0.8rem; font-weight: 700;
  padding: 5px 20px; border-radius: 20px; letter-spacing: 1px;
}

/* Three-column price options */
.price-options {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; margin: 16px 0 8px;
}
.price-option {
  position: relative;
  background: var(--bg-gray);
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 14px 8px 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}
.price-option:hover { background: #fff; border-color: var(--border); }
.price-option.active {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.price-option .po-badge {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; font-size: 0.65rem; font-weight: 700;
  padding: 2px 10px; border-radius: 10px; white-space: nowrap;
}
.price-option .po-period {
  font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px;
}
.price-option.active .po-period { color: var(--primary); }
.price-option .po-yearly {
  font-size: 1.35rem; font-weight: 800; color: var(--text); line-height: 1.2;
}
.price-option .po-yearly small { font-size: 0.7rem; font-weight: 400; color: var(--text-secondary); }
.price-option.active .po-yearly { color: var(--primary); }
.price-option .po-discount {
  font-size: 0.7rem; font-weight: 700; padding: 1px 8px; border-radius: 4px;
  display: inline-block; margin: 2px 0;
}
.price-option:nth-child(2) .po-discount { background: #FEF3C7; color: #D97706; }
.price-option:nth-child(3) .po-discount { background: #FEE2E2; color: #DC2626; }
.price-option .po-total {
  font-size: 0.75rem; color: var(--text-light); margin-top: 2px;
}
.price-option .po-save {
  font-size: 0.78rem; font-weight: 700; color: var(--success);
}

/* Saved badge (legacy, keep for compatibility) */
.pricing-card .saved { font-size: 0.95rem; font-weight: 600; color: var(--success); margin-bottom: 4px; padding: 6px 16px; background: #ECFDF5; border-radius: 20px; display: inline-block; }
.pricing-card ul { text-align: left; margin-bottom: 28px; line-height: 2.2; font-size: 0.95rem; }
.pricing-card ul li::before { content: "\2705\FE0F "; }
.pricing-banner { text-align: center; background: var(--danger); color: #fff; padding: 14px; border-radius: var(--radius); font-weight: 600; margin-bottom: 24px; max-width: 900px; margin-left: auto; margin-right: auto; }
.pricing-note { text-align: center; color: var(--text-light); font-size: 0.85rem; }

/* FAQ */
.faq-list { max-width: 800px; margin: 60px auto 0; }
.faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
.faq-item summary { font-weight: 600; cursor: pointer; font-size: 1.05rem; padding: 4px 0; }
.faq-item summary:hover { color: var(--primary); }
.faq-item .faq-answer { padding-top: 12px; color: var(--text-secondary); line-height: 1.8; font-size: 0.95rem; }

/* Device Section */
.device-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.device-card { text-align: center; padding: 32px 20px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.device-card .device-icon { font-size: 3rem; margin-bottom: 12px; }
.device-card h4 { margin-bottom: 8px; }
.device-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* Testimonials */
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.testimonial-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; transition: box-shadow 0.2s; }
.testimonial-card:hover { box-shadow: var(--shadow-md); }
.testimonial-card blockquote { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8; margin-bottom: 16px; font-style: italic; }
.testimonial-card .author { font-weight: 600; color: var(--text); }
.testimonial-card .meta { font-size: 0.85rem; color: var(--text-light); margin-top: 2px; }
.logo-wall { margin-top: 48px; opacity: 0.4; text-align: center; color: var(--text-light); font-size: 2rem; letter-spacing: 24px; }

/* Case Detail Page */
.case-detail { max-width: 800px; margin: 0 auto; }
.case-meta { display: flex; gap: 16px; flex-wrap: wrap; margin: 20px 0 32px; }
.case-tag { padding: 4px 12px; background: var(--primary-light); color: var(--primary); border-radius: 20px; font-size: 0.85rem; font-weight: 500; }
.case-before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 32px 0; }
.case-before, .case-after { padding: 20px; border-radius: var(--radius); }
.case-before { background: #FEF2F2; }
.case-after { background: #F0FDF4; }
.case-before h4, .case-after h4 { margin-bottom: 12px; }
.case-before ul li, .case-after ul li { font-size: 0.9rem; line-height: 1.8; }
.case-before ul li::before { content: "\274C "; }
.case-after ul li::before { content: "\2705\FE0F"; }
.case-quote { background: var(--bg-blue); border-left: 4px solid var(--primary); padding: 20px; border-radius: 0 var(--radius) var(--radius) 0; font-style: italic; color: var(--text-secondary); margin-top: 24px; }

/* News/Articles */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.article-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: box-shadow 0.2s; }
.article-card:hover { box-shadow: var(--shadow-md); }
.article-card .article-img { height: 180px; background: var(--bg-blue); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.article-card .article-body { padding: 20px; }
.article-card .article-date { font-size: 0.8rem; color: var(--text-light); margin-bottom: 8px; }
.article-card .article-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.article-card .article-body p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.article-card .article-body a { font-weight: 600; font-size: 0.9rem; margin-top: 8px; display: inline-block; }

/* Article content page */
.article-content { max-width: 750px; margin: 0 auto; font-size: 1.05rem; line-height: 1.9; }
.article-content h2 { font-size: 1.5rem; margin: 40px 0 16px; }
.article-content h3 { margin: 28px 0 12px; }
.article-content p { margin-bottom: 16px; }
.article-content ul, .article-content ol { margin: 16px 0; padding-left: 24px; list-style: disc; }
.article-content ul li, .article-content ol li { margin-bottom: 8px; }
.article-meta { color: var(--text-light); font-size: 0.9rem; margin: 16px 0 32px; display: flex; gap: 16px; flex-wrap: wrap; }
.article-tags { display: flex; gap: 8px; margin-top: 32px; }
.article-tags span { padding: 4px 12px; background: var(--bg-gray); border-radius: 20px; font-size: 0.85rem; color: var(--text-secondary); }

/* About Page */
.about-story { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-story .story-image { background: var(--bg-blue); border-radius: var(--radius-lg); min-height: 320px; display: flex; align-items: center; justify-content: center; font-size: 5rem; }
.about-story p { color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.value-item { text-align: center; padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }
.value-item .val-icon { font-size: 2rem; margin-bottom: 12px; }
.contact-section { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 32px; }
.contact-card { text-align: center; padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); }

/* Trial Page */
.trial-hero { text-align: center; }
.trial-hero h1 { font-size: 2.2rem; }
.trial-steps { display: flex; gap: 16px; justify-content: center; margin: 32px 0; }
.trial-step { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.trial-step-num { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; }
.trial-form { max-width: 400px; margin: 24px auto 0; }
.trial-form input { width: 100%; padding: 14px 16px; border: 2px solid var(--border); border-radius: var(--radius); font-size: 1rem; margin-bottom: 12px; }
.trial-form input:focus { outline: none; border-color: var(--primary); }
.trial-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 700px; margin: 48px auto 0; }
.trial-features li { padding: 8px 12px; background: var(--bg-gray); border-radius: var(--radius); font-size: 0.9rem; }

/* Demo Page */
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.demo-form label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.95rem; }
.demo-form input, .demo-form select, .demo-form textarea {
  width: 100%; padding: 12px 16px; border: 2px solid var(--border);
  border-radius: var(--radius); font-size: 1rem; margin-bottom: 16px;
  font-family: inherit;
}
.demo-form input:focus, .demo-form select:focus, .demo-form textarea:focus { outline: none; border-color: var(--primary); }
.demo-form .checkboxes { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.demo-form .checkboxes label { font-weight: 400; display: flex; align-items: center; gap: 6px; cursor: pointer; }
.demo-info h3 { margin-bottom: 12px; }
.demo-info ul li { padding: 8px 0; padding-left: 20px; position: relative; color: var(--text-secondary); }
.demo-info ul li::before { content: "·"; position: absolute; left: 4px; font-weight: 700; color: var(--primary); }

/* Breadcrumb */
.breadcrumb { padding: calc(var(--nav-height) + 20px) 0 0; font-size: 0.9rem; color: var(--text-light); }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb span { color: var(--text); }

/* Page Header */
.page-header { padding: 48px 0 0; text-align: center; }
.page-header h1 { font-size: 2.2rem; }
.page-header p { color: var(--text-secondary); font-size: 1.1rem; margin-top: 12px; }

/* CTA Section */
.cta-section { text-align: center; padding: 60px 0; }
.cta-section h2 { margin-bottom: 12px; }
.cta-section p { color: var(--text-secondary); margin-bottom: 24px; font-size: 1.05rem; }
.cta-section .cta-aux { margin-top: 12px; font-size: 0.9rem; color: var(--text-light); }

/* Footer */
.footer { background: var(--text); color: #CBD5E1; padding: 60px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
.footer h4 { color: #fff; margin-bottom: 16px; font-size: 1rem; }
.footer a { color: #94A3B8; font-size: 0.9rem; }
.footer a:hover { color: #fff; }
.footer ul li { margin-bottom: 8px; }
.footer-brand { font-size: 1.3rem; font-weight: 800; color: #fff !important; margin-bottom: 8px; display: block; }
.footer-brand span { color: var(--primary); }
.footer-bottom { border-top: 1px solid #334155; margin-top: 40px; padding-top: 20px; text-align: center; font-size: 0.85rem; color: #64748B; }

/* Responsive */
@media (max-width: 1024px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .hero h1 { font-size: 2.2rem; }
  .pain-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .feature-block { grid-template-columns: 1fr; gap: 24px; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .device-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .about-story { grid-template-columns: 1fr; }
  .contact-section { grid-template-columns: repeat(2, 1fr); }
  .demo-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .trial-features { grid-template-columns: 1fr 1fr; }
  .case-before-after { grid-template-columns: 1fr; }
  .feature-page-block .feat-list { grid-template-columns: 1fr; }
}
/* ===========================
   SEO模块：最新发文 + 常见问题
   =========================== */
.seo-articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.seo-article-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow 0.2s, transform 0.2s; }
.seo-article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.seo-article-top { position: relative; height: 140px; display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.seo-article-top.purple {
  background: linear-gradient(135deg, #7C3AED, #78BFA); /* 渐变作为后备背景 */
  width: 100%;
  height: 180px; /* 必须设固定高度，或者用 aspect-ratio */
  position: relative;
  overflow: hidden; /* 关键：裁切溢出的部分 */
  border-radius: 12px; /* 如果有圆角，图片也会跟着裁切 */
}

.seo-article-top.purple img {
 position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover; 
}
.seo-article-top.blue { background: linear-gradient(135deg, #2563EB, #60A5FA); }
.seo-article-top.green { background: linear-gradient(135deg, #059669, #34D399); }
.seo-article-date { position: absolute; top: 12px; right: 12px; background: rgba(255,255,255,0.95); color: var(--text); padding: 4px 10px; border-radius: 4px; font-size: 0.8rem; font-weight: 600;z-index: 100 }
.seo-article-body { padding: 20px; }
.seo-article-body h4 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.5; }
.seo-article-body h4 a { color: var(--text); }
.seo-article-body h4 a:hover { color: var(--primary); }
.seo-article-body p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.7; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.seo-article-body .seo-more { color: var(--primary); font-weight: 600; font-size: 0.85rem; }
.seo-article-body .seo-more:hover { color: var(--primary-dark); }

/* FAQ 常见问题 */
.seo-faq { max-width: 900px; margin: 40px auto 0; }
.seo-faq details { border-bottom: 1px dashed var(--border); padding: 0;}
.seo-faq details:last-child { border-bottom: none; }
.seo-faq summary { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; cursor: pointer; font-weight: 600; font-size: 1.05rem; line-height: 1.5; list-style: none; }
.seo-faq summary::-webkit-details-marker { display: none; }
.seo-faq summary::after { content: "▼"; font-size: 0.7rem; color: var(--text-light); transition: transform 0.2s; flex-shrink: 0; margin-left: 16px; }
.seo-faq details[open] summary::after { transform: rotate(180deg);}
.seo-faq details[open] summary { color: var(--primary); }
.seo-faq .faq-answer { padding: 0 0 20px 20px; border-left: 3px solid var(--primary); margin-left: 4px; color: var(--text-secondary); line-height: 1.9; font-size: 0.95rem; }

/* 发文单列（手机端也用卡片） */
@media (max-width: 1024px) {
  .seo-articles-grid { grid-template-columns: repeat(2, 1fr);}
}
@media (max-width: 768px) {
  .seo-articles-grid { grid-template-columns: 1fr;}
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }
  .nav-links { display: none; position: fixed; top: var(--nav-height); left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border); gap: 16px;}
  .nav-links.active { display: flex; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 1.8rem; }
  .section { padding: 48px 0; }
  .articles-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .trial-steps { flex-direction: column; }
}
  * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        color: #1e293b;
        background: #ffffff;
        line-height: 1.6;
    }
    
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    
    a {
        color: #2563eb;
        text-decoration: none;
        transition: color 0.2s;
    }
    a:hover {
        color: #1d4ed8;
    }
    
    ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    /* ========================================
       容器系统（模拟Bootstrap容器）
       ======================================== */
    .container-fluid {
        width: 100%;
        padding-left: 0;
        padding-right: 0;
    }
    
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
    
    /* ========================================
       网格系统（模拟Bootstrap网格）
       ======================================== */
    .row {
        display: flex;
        flex-wrap: wrap;
        margin: 0 -12px;
    }
    
    .row.g-4 {
        margin: 0 -16px;
    }
    .row.g-4 > [class*="col-"] {
        padding: 0 16px;
    }
    
    .col-12 {
        flex: 0 0 100%;
        max-width: 100%;
        padding: 0 12px;
    }
    
    .col-lg-9 {
        flex: 0 0 75%;
        max-width: 75%;
        padding: 0 12px;
    }
    
    .col-lg-3 {
        flex: 0 0 25%;
        max-width: 25%;
        padding: 0 12px;
    }
    
    .col-md-6 {
        flex: 0 0 50%;
        max-width: 50%;
        padding: 0 12px;
    }
    
    .col {
        flex: 1 0 0%;
        padding: 0 12px;
    }
    
    /* ========================================
       工具类（模拟Bootstrap工具）
       ======================================== */
    .bg-light {
        background-color: #f8fafc;
    }
    
    .bg-white {
        background-color: #ffffff;
    }
    
    .bg-body-secondary {
        background-color: #f1f5f9;
    }
    
    .bg-secondary-subtle {
        background-color: #eff6ff;
    }
    
    .rounded-4 {
        border-radius: 16px;
    }
    
    .rounded-3 {
        border-radius: 12px;
    }
    
    .rounded-5 {
        border-radius: 40px;
    }
    
    .border-0 {
        border: 0;
    }
    
    .border {
        border: 1px solid #e2e8f0;
    }
    
    .border-1 {
        border: 1px solid #e2e8f0;
    }
    
    .shadow-sm {
        box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    }
    
    /* ========================================
       间距工具
       ======================================== */
    .p-2 { padding: 0.5rem; }
    .p-3 { padding: 1rem; }
    .p-4 { padding: 1.5rem; }
    .px-3 { padding-left: 1rem; padding-right: 1rem; }
    .px-4 { padding-left: 1.5rem; padding-right: 1.5rem; }
    .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
    .py-3 { padding-top: 1rem; padding-bottom: 1rem; }
    .py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
    .py-5 { padding-top: 3rem; padding-bottom: 3rem; }
    
    .ps-0 { padding-left: 0; }
    .ps-3 { padding-left: 1rem; }
    .ps-lg-4 { padding-left: 1.5rem; }
    
    .mb-3 { margin-bottom: 1rem; }
    .mb-4 { margin-bottom: 1.5rem; }
    .mb-5 { margin-bottom: 3rem; }
    .mt-3 { margin-top: 1rem; }
    .my-4 { margin-top: 1.5rem; margin-bottom: 1.5rem; }
    
    .m-0 { margin: 0; }
    
    /* ========================================
       弹性布局工具
       ======================================== */
    .d-flex { display: flex; }
    .d-block { display: block; }
    .d-none { display: none; }
    .d-inline-block { display: inline-block; }
    
    .flex-column { flex-direction: column; }
    .flex-wrap { flex-wrap: wrap; }
    
    .justify-content-center { justify-content: center; }
    .justify-content-between { justify-content: space-between; }
    
    .align-content-center { align-content: center; }
    .align-items-center { align-items: center; }
    
    /* ========================================
       文本工具
       ======================================== */
    .text-center { text-align: center; }
    .text-black { color: #1e293b; }
    .text-black-50 { color: #64748b; }
    .text-secondary { color: #64748b; }
    .text-muted { color: #94a3b8; }
    .text-decoration-none { text-decoration: none; }
    .text-dark { color: #1e293b; }
    
    .fw-bold { font-weight: 700; }
    .fs-4 { font-size: 1.1rem; }
    .fs-5 { font-size: 1.05rem; }
    .lh-lg { line-height: 1.8; }
    .display-6 { font-size: 1.8rem; font-weight: 700; }
    .h3 { font-size: 1.25rem; font-weight: 600; }
    .h2 { font-size: 2rem; font-weight: 700; }
    
    /* ========================================
       卡片组件
       ======================================== */
    .card {
        background: #ffffff;
        border-radius: 12px;
        overflow: hidden;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .h-100 {
        height: 100%;
    }
    
    /* ========================================
       粘性定位
       ======================================== */
    .sticky-top {
        position: sticky;
        top: 100px;
        z-index: 2;
    }
    
    /* ========================================
       自定义：资讯详情页
       ======================================== */
    .news-content {
        font-size: 1.1rem;
        line-height: 1.9;
        color: #1e293b;
    }
    .news-content img {
        max-width: 100%;
        height: auto;
        border-radius: 12px;
        margin: 1rem 0;
    }
    .news-content p {
        margin-bottom: 1.2rem;
    }
    
    /* ========================================
       自定义：产品矩阵
       ======================================== */
    .product-matrix li {
        margin-bottom: 1.5rem;
    }
    .product-matrix li:last-child {
        margin-bottom: 0;
    }
    .product-matrix a {
        display: flex;
        flex-direction: column;
        background-color: #eff6ff;
        border-radius: 12px;
        overflow: hidden;
        transition: box-shadow 0.3s;
    }
    .product-matrix a:hover {
        box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .product-matrix a img {
        width: 100%;
        height: auto;
    }
    .product-matrix a p {
        padding: 0.5rem 1rem;
        text-align: center;
        font-size: 1.1rem;
        background: #ffffff;
        border-top: 1px solid #e2e8f0;
        margin: 0;
    }
    
    /* ========================================
       自定义：相关文章
       ======================================== */
    .related-articles .related-col .card {
        transition: transform 0.2s, box-shadow 0.2s;
        border: 1px solid #e2e8f0;
        border-radius: 16px;
    }
    .related-articles .related-col .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    .related-articles .related-col .card-body h2 {
        font-size: 1.2rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
    }
    .related-articles .related-col .card-body p {
        color: #64748b;
        font-size: 0.95rem;
        line-height: 1.7;
        margin-top: 1rem;
        margin-bottom: 1.5rem;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    /* ========================================
       自定义：关注标签
       ======================================== */
    .tag-item a {
        display: flex;
        justify-content: center;
        align-content: center;
        padding: 0.5rem 1rem;
        border: 1px solid #e2e8f0;
        border-radius: 40px;
        background-color: #f8fafc;
        font-size: 1.1rem;
        color: #64748b;
        transition: all 0.2s;
        text-decoration: none;
        text-align: center;
    }
    .tag-item a:hover {
        background-color: #dbeafe;
        border-color: #2563eb;
        color: #2563eb;
    }
    .tag-item a p {
        margin: 0;
    }
    
    /* ========================================
       行/列 辅助（row-cols）
       ======================================== */
    .row-cols-2 > * {
        flex: 0 0 50%;
        max-width: 50%;
    }
    .row-cols-sm-2 > * {
        flex: 0 0 50%;
        max-width: 50%;
    }
    .row-cols-md-3 > * {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
    .row-cols-lg-4 > * {
        flex: 0 0 25%;
        max-width: 25%;
    }
    .row-cols-xl-5 > * {
        flex: 0 0 20%;
        max-width: 20%;
    }
    
    /* ========================================
       响应式
       ======================================== */
    @media (min-width: 992px) {
        .d-lg-block { display: block; }
        .d-lg-none { display: none; }
    }
    
    @media (max-width: 991.98px) {
        .col-lg-9 {
            flex: 0 0 100%;
            max-width: 100%;
        }
        .col-lg-3 {
            flex: 0 0 100%;
            max-width: 100%;
            padding-left: 0;
            padding-right: 0;
        }
        .ps-lg-4 {
            padding-left: 0;
        }
        .sticky-top {
            position: relative;
            top: 0;
        }
        .d-none.d-lg-block {
            display: none !important;
        }
    }
.list_line{font-size: 18px;border-left: 3px solid var(--primary);}
    @media (max-width: 767.98px) {
        .col-md-6 {
            flex: 0 0 100%;
            max-width: 100%;
        }
        .display-6 {
            font-size: 1.4rem;
        }
        .fs-4 {
            font-size: 1rem;
        }
        .p-4 {
            padding: 1rem;
        }
        .row-cols-sm-2 > * {
            flex: 0 0 50%;
            max-width: 50%;
        }
    }
    
    @media (max-width: 575.98px) {
        .row-cols-2 > * {
            flex: 0 0 50%;
            max-width: 50%;
        }
    }