@charset "UTF-8";
/* ============================================================
   苏秦数据 · 官网样式（token 驱动 · 科技蓝紫渐变）
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-base);
  color: var(--color-text);
  background: var(--color-surface);
}
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { padding-left: 1.2em; }
button { font: inherit; cursor: pointer; }

/* 2. 设计令牌 */
:root {
  --color-primary-500: #6759FF;
  --color-primary-600: #5748EB;
  --color-primary-700: #4A3BD9;
  --color-accent: #7c3aed;
  --color-accent-600: #6d28d9;
  --color-surface: #ffffff;
  --color-bg: #f6f7fb;
  --color-text-strong: #16192e;
  --color-text: #3f4356;
  --color-text-muted: #6b6f83;
  --color-border: #e4e6ef;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-warning: #d97706;
  --color-warning-bg: #fefce8;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-info: #0284c7;
  --color-info-bg: #f0f9ff;
  --gradient-brand: linear-gradient(135deg, #2563eb 0%, #6759FF 48%, #7c3aed 100%);
  --gradient-soft: linear-gradient(135deg, #eef1ff 0%, #f5f0ff 100%);
  --font-title: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 2.75rem;
  --leading-tight: 1.25;
  --leading-base: 1.7;
  --leading-relaxed: 1.9;
  --space-1: 4px; --space-2: 8px; --space-2-5: 12px; --space-3: 16px;
  --space-4: 24px; --space-5: 32px; --space-6: 48px; --space-7: 64px; --space-8: 96px;
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px; --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(22,25,46,.06);
  --shadow-md: 0 8px 24px rgba(22,25,46,.10);
  --shadow-lg: 0 20px 48px rgba(22,25,46,.16);
  --container: 1200px;
  --measure: 65ch;
  --header-h: 68px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 120ms; --dur-base: 220ms; --dur-slow: 360ms;
}

/* 3. 布局 */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 16px; }
.section { padding-block: var(--space-7); }
.section-alt { background: var(--color-bg); }
.section-head { max-width: 640px; margin: 0 auto var(--space-6); text-align: center; }
.section-head h2 { font-family: var(--font-title); font-size: var(--text-2xl); line-height: 1.3; color: var(--color-text-strong); }
.section-head p { color: var(--color-text-muted); margin-top: var(--space-3); }
.container-narrow { max-width: 800px; }
.measure { max-width: var(--measure); }

/* 4. 栅格 */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }

/* 5. 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: var(--radius-md); font-weight: 600; border: 0; font-size: var(--text-base); transition: transform var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out); }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--color-primary-500); color: #fff; }
.btn-primary:hover { background: var(--color-primary-600); box-shadow: var(--shadow-md); }
.btn-ghost { border: 1px solid var(--color-border); color: var(--color-text-strong); background: transparent; }
.btn-ghost:hover { border-color: var(--color-primary-500); color: var(--color-primary-500); }
.btn-light { background: #fff; color: var(--color-primary-600); }
.btn-sm { padding: 9px 16px; font-size: var(--text-sm); }

/* 6. Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid transparent; transition: box-shadow .2s ease, border-color .2s ease; }
.site-header.is-scrolled { box-shadow: var(--shadow-sm); border-bottom-color: var(--color-border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: var(--space-4); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-title); font-size: var(--text-lg); font-weight: 700; color: var(--color-text-strong); }
.brand-mark { width: 30px; height: 30px; flex: none; }
.nav-links { display: flex; align-items: center; gap: var(--space-5); }
.nav-links a { color: var(--color-text); font-weight: 500; }
.nav-links a:hover { color: var(--color-primary-500); }
.nav-links a[aria-current="page"] { color: var(--color-primary-600); font-weight: 600; }
.nav-toggle { display: none; background: none; border: 0; font-size: 22px; color: var(--color-text-strong); }

/* 7. Hero（深色渐变） */
.hero { padding-block: var(--space-8); background: var(--gradient-brand); color: #fff; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 80% at 82% 8%, rgba(255,255,255,.16), transparent 60%), radial-gradient(50% 60% at 8% 92%, rgba(255,255,255,.10), transparent 60%); pointer-events: none; }
.hero-inner { max-width: 880px; margin-inline: auto; text-align: center; position: relative; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border: 1px solid rgba(255,255,255,.35); border-radius: var(--radius-full); font-size: var(--text-sm); font-weight: 600; color: #fff; background: rgba(255,255,255,.10); margin-bottom: var(--space-4); }
.hero h1 { font-family: var(--font-title); font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.16; color: #fff; letter-spacing: -.01em; }
.hero-sub { color: rgba(255,255,255,.92); font-size: var(--text-lg); margin-top: var(--space-4); max-width: 680px; margin-inline: auto; line-height: var(--leading-base); }
.hero-quote { margin: var(--space-5) auto 0; max-width: 600px; font-size: var(--text-sm); color: rgba(255,255,255,.88); border-left: 2px solid rgba(255,255,255,.55); padding-left: var(--space-3); text-align: left; }
.hero-actions { display: flex; gap: var(--space-3); justify-content: center; margin-top: var(--space-5); flex-wrap: wrap; }
.hero .btn-primary { background: #fff; color: var(--color-primary-600); }
.hero .btn-primary:hover { background: #eef0fb; }
.hero .btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.hero .btn-ghost:hover { border-color: #fff; color: #fff; }

/* 8. 内页 Hero */
.page-hero { padding-block: var(--space-7); background: var(--gradient-soft); text-align: center; border-bottom: 1px solid var(--color-border); }
.page-hero h1 { font-family: var(--font-title); font-size: var(--text-3xl); color: var(--color-text-strong); }
.page-hero p { color: var(--color-text-muted); margin-top: var(--space-3); max-width: 640px; margin-inline: auto; }

/* 9. 卡片 */
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-border); }
.card-icon { font-size: 28px; margin-bottom: var(--space-3); color: var(--color-primary-500); }
.card-icon svg { width: 32px; height: 32px; }
.card h3 { font-family: var(--font-title); font-size: var(--text-lg); color: var(--color-text-strong); margin-bottom: var(--space-2); }
.card p { color: var(--color-text-muted); }
.card-link { color: var(--color-primary-500); font-weight: 600; display: inline-block; margin-top: var(--space-3); }
.card-link:hover { color: var(--color-primary-600); }
.card-product { display: flex; flex-direction: column; }
.card-product .card-link { margin-top: auto; padding-top: var(--space-3); }
.card-list { list-style: none; padding: 0; margin: var(--space-3) 0 var(--space-2); display: grid; gap: var(--space-2); }
.card-list li { padding-left: 22px; position: relative; color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.6; }
.card-list li::before { content: ""; position: absolute; left: 2px; top: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); }

/* 10. AI 平台墙 */
.platform-list { display: flex; flex-wrap: wrap; gap: var(--space-2); justify-content: center; margin-top: var(--space-4); }
.platform-chip { padding: 10px 20px; border: 1px solid var(--color-border); border-radius: var(--radius-full); font-weight: 600; color: var(--color-text); background: var(--color-surface); font-size: var(--text-base); transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out); }
.platform-chip:hover { border-color: var(--color-accent); color: var(--color-accent-600); transform: translateY(-2px); }
.platform-note { margin-top: var(--space-4); color: var(--color-text-muted); text-align: center; }

/* 11. GEO 定义 */
.geo-def { background: var(--gradient-soft); border: 1px solid var(--color-border); border-left: 4px solid var(--color-accent); border-radius: var(--radius-lg); padding: var(--space-5); max-width: 780px; margin: 0 auto var(--space-6); }
.geo-def p { font-size: var(--text-lg); color: var(--color-text-strong); line-height: var(--leading-relaxed); }
.geo-def strong { color: var(--color-primary-600); }

/* 12. 关于 */
.about-grid { display: grid; gap: var(--space-6); align-items: center; }
.about-media { min-height: 300px; background: var(--gradient-brand); color: #fff; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-lg); position: relative; overflow: hidden; }
.about-media::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 70% at 80% 15%, rgba(255,255,255,.16), transparent 60%); }
.about-glyph { font-size: 108px; font-weight: 800; font-family: var(--font-title); line-height: 1; position: relative; }
.about-tag { position: absolute; bottom: var(--space-4); font-size: var(--text-sm); color: rgba(255,255,255,.9); letter-spacing: .14em; }
.about-body h2 { font-family: var(--font-title); font-size: var(--text-2xl); color: var(--color-text-strong); margin-bottom: var(--space-4); }
.about-body p { color: var(--color-text-muted); margin-bottom: var(--space-3); line-height: var(--leading-relaxed); }
.check-list { list-style: none; padding: 0; margin-top: var(--space-4); }
.check-list li { padding-left: 28px; position: relative; margin-bottom: var(--space-2); color: var(--color-text); }
.check-list li::before { content: "\2713"; position: absolute; left: 0; top: 0; color: var(--color-primary-500); font-weight: 700; }

/* 13. 数据 */
.stats { display: grid; grid-template-columns: 1fr; gap: var(--space-4); text-align: center; }
.stat { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); }
.stat strong { display: block; font-family: var(--font-title); font-size: var(--text-3xl); color: var(--color-primary-500); }
.stat span { color: var(--color-text-muted); font-size: var(--text-sm); }

/* 14. 流程 */
.steps { list-style: none; padding: 0; display: grid; gap: var(--space-4); counter-reset: step; }
.steps li { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); position: relative; }
.step-num { display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: var(--radius-full); background: var(--color-primary-500); color: #fff; font-weight: 700; margin-bottom: var(--space-3); }
.steps h3 { font-family: var(--font-title); color: var(--color-text-strong); margin-bottom: var(--space-2); }
.steps p { color: var(--color-text-muted); }

/* 15. FAQ */
.faq-list details { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: var(--space-3); background: var(--color-surface); }
.faq-list summary { padding: var(--space-4); cursor: pointer; font-weight: 600; color: var(--color-text-strong); list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); }
.faq-list summary::after { content: "+"; font-size: 22px; color: var(--color-primary-500); flex: none; transition: transform var(--dur-base) var(--ease-in-out); }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list details p { padding: 0 var(--space-4) var(--space-4); color: var(--color-text-muted); line-height: var(--leading-relaxed); }

/* 16. CTA */
.cta { background: var(--gradient-brand); color: #fff; }
.cta-inner { text-align: center; max-width: 640px; margin-inline: auto; }
.cta-inner h2 { font-family: var(--font-title); font-size: var(--text-2xl); }
.cta-inner p { margin: var(--space-3) 0 var(--space-5); color: rgba(255,255,255,.92); }

/* 17. Footer */
.site-footer { background: #12142a; color: #c7cbe0; padding-top: var(--space-7); }
.site-footer a { color: #c7cbe0; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
.footer-brand .brand { color: #fff; }
.footer-brand p { color: #9aa0bd; margin-top: var(--space-2); max-width: 34ch; }
.footer-col { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col-title { color: #fff; font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-2); }
.footer-bottom { border-top: 1px solid #242842; margin-top: var(--space-6); padding-block: var(--space-4); color: #8b90ab; font-size: var(--text-sm); text-align: center; }

/* 18. 联系 */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
.contact-info h2 { font-family: var(--font-title); color: var(--color-text-strong); margin-bottom: var(--space-4); }
.contact-info ul { list-style: none; padding: 0; }
.contact-info li { margin-bottom: var(--space-3); color: var(--color-text); display: flex; gap: var(--space-2); }
.contact-info li strong { min-width: 72px; color: var(--color-text-strong); }
.contact-info a { color: var(--color-primary-600); }

.address-panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); text-align: center; }
.address-panel h2 { font-family: var(--font-title); font-size: var(--text-xl); color: var(--color-text-strong); margin-bottom: var(--space-3); }
.address-panel p { color: var(--color-text-muted); }
.contact-qr { text-align: center; }
.contact-qr h2 { font-family: var(--font-title); color: var(--color-text-strong); margin-bottom: var(--space-4); }
.qr-figure { display: inline-block; }
.qr-figure img { width: 180px; height: 180px; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 8px; background: var(--color-surface); }
.qr-figure figcaption { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }


/* 20. 滚动入场 */
html.js [data-reveal] { opacity: 0; transform: translateY(16px); }
html.js [data-reveal].is-visible { opacity: 1; transform: none; transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.grid > [data-reveal]:nth-child(2) { transition-delay: 60ms; }
.grid > [data-reveal]:nth-child(3) { transition-delay: 120ms; }
.grid > [data-reveal]:nth-child(4) { transition-delay: 180ms; }
@media (prefers-reduced-motion: reduce) {
  html.js [data-reveal] { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* 21. 响应式 */
@media (max-width: 767px) {
  .nav-links { display: none; flex-direction: column; align-items: stretch; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--color-surface); padding: var(--space-4); box-shadow: var(--shadow-md); }
  .site-header.nav-open .nav-links { display: flex; }
  .nav-toggle { display: inline-flex; }
  .site-header .btn { padding: 9px 14px; font-size: var(--text-sm); }
}
@media (min-width: 768px) {
  .container { padding-inline: 24px; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .stats { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
  .steps { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
  .about-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.4fr; }
  .contact-grid { grid-template-columns: 1fr 1.1fr; align-items: start; }
  .section-head h2, .about-body h2, .cta-inner h2 { font-size: var(--text-3xl); }
}

/* 22. 列表页与详情页 */
.breadcrumb { font-size: var(--text-sm); color: var(--color-text-muted); background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.breadcrumb-inner { padding-block: var(--space-3); }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before { content: ""; width: 6px; height: 6px; border-top: 1.5px solid var(--color-text-muted); border-right: 1.5px solid var(--color-text-muted); transform: rotate(45deg); margin-right: var(--space-2); }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary-500); }
.breadcrumb [aria-current="page"] { color: var(--color-text-strong); }
.product-detail { display: grid; gap: var(--space-6); }
.product-gallery { min-height: 280px; background: var(--gradient-brand); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 72px; font-weight: 800; font-family: var(--font-title); position: relative; overflow: hidden; }
.product-gallery::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 70% at 80% 15%, rgba(255,255,255,.16), transparent 60%); }
.product-info h1 { font-family: var(--font-title); font-size: var(--text-2xl); color: var(--color-text-strong); }
.product-lead { color: var(--color-primary-600); font-weight: 600; margin: var(--space-2) 0 var(--space-4); font-size: var(--text-lg); }
.product-info .btn { margin-top: var(--space-4); }
.spec-list { list-style: none; padding: 0; border-top: 1px solid var(--color-border); }
.spec-list li { padding: 12px 0; border-bottom: 1px solid var(--color-border); display: flex; gap: var(--space-3); }
.spec-list strong { min-width: 96px; color: var(--color-text-strong); }
.article-body { font-size: var(--text-base); line-height: var(--leading-relaxed); color: var(--color-text); }
.article-body h2 { font-family: var(--font-title); font-size: var(--text-xl); color: var(--color-text-strong); margin: var(--space-5) 0 var(--space-3); }
.article-body p { margin-bottom: var(--space-4); }
.article-body ul { margin-bottom: var(--space-4); }
.article-meta { color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-5); }
.article-meta h1 { font-family: var(--font-title); font-size: var(--text-2xl); line-height: 1.3; color: var(--color-text-strong); margin-bottom: var(--space-2); }
@media (min-width: 768px) { .product-detail { grid-template-columns: 1fr 1fr; align-items: start; } }

/* 23. 无障碍 */
input:user-invalid, textarea:user-invalid, select:user-invalid { border-color: var(--color-error); }
:focus-visible { outline: 2px solid var(--color-primary-500); outline-offset: 2px; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; background: var(--color-primary-500); color: #fff; padding: 8px 16px; border-radius: 0 0 var(--radius-md) 0; }
.skip-link:focus { left: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }