/* 设计变量取自原前端 globals.css，保持视觉一致 */
:root {
  --bg: #fafafb;
  --panel: #ffffff;
  --text: #111827;
  --body: #4b5563;
  --muted: #9ca3af;
  --line: #e5e7eb;
  --line-strong: #d1d5db;
  --primary: #8b5cf6;
  --primary-2: #2563eb;
  --primary-soft: #f5f3ff;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow: 0 10px 28px rgba(17, 24, 39, 0.055);
  --shadow-soft: 0 18px 48px rgba(17, 24, 39, 0.07);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --font-ui: Calibri, Aptos, Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--body);
  padding: 8px 12px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .18s var(--ease), border-color .18s var(--ease),
              box-shadow .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}
button:hover, .btn:hover {
  border-color: var(--line-strong);
  box-shadow: 0 5px 16px rgba(17, 24, 39, .05);
  transform: translateY(-1px);
}
.primary-action {
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
}
.primary-action:hover { box-shadow: 0 10px 24px rgba(139, 92, 246, .32); }

/* ---------- 顶部公告条 ---------- */
.top-announcement {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 42px; padding: 0 16px;
  border-bottom: 1px solid rgba(229, 231, 235, .72);
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(8px);
  font-size: 13px;
}
.top-announcement span:first-of-type {
  padding: 2px 8px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary); font-weight: 600;
}
.top-announcement strong { font-weight: 600; }
.top-announcement button { min-height: 28px; padding: 4px 10px; border: 0; background: none; color: var(--primary); }

/* ---------- 导航 ---------- */
.site-nav {
  position: sticky; top: 42px; z-index: 19;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 18px;
  height: 74px; padding: 0 24px;
  border-bottom: 1px solid rgba(229, 231, 235, .9);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
}
.brand-mark { display: flex; align-items: center; gap: 10px; border: 0; background: none; padding: 0; }
.brand-mark img { width: 32px; height: 32px; border-radius: 9px; }
.brand-mark strong { display: flex; flex-direction: column; align-items: flex-start; color: var(--text); font-size: 15px; }
.brand-mark small { color: var(--muted); font-size: 11px; font-weight: 500; }
.site-links, .site-actions { display: flex; align-items: center; gap: 8px; }
.site-actions { justify-self: end; }
.site-links button, .site-actions button:not(.primary-action) { border: 0; background: none; }

/* ---------- Hero ---------- */
.hero-section {
  position: relative;
  display: grid; justify-items: center; gap: 34px;
  max-width: 1220px; margin: 0 auto;
  padding: 118px 24px 86px;
}
.hero-copy { max-width: 760px; text-align: center; }
.eyebrow {
  display: inline-block; margin-bottom: 18px;
  padding: 4px 12px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary);
  font-size: 12px; font-weight: 600;
}
.hero-copy h1 { margin: 0 0 20px; font-size: 52px; line-height: 1.14; letter-spacing: -.02em; }
.hero-copy h1 span { background: linear-gradient(135deg, var(--primary), var(--primary-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-copy p { margin: 20px auto 28px; max-width: 620px; color: var(--body); font-size: 15px; line-height: 1.75; }
.capability-row { display: flex; justify-content: center; gap: 10px; }
.capability-row span {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--panel); color: var(--body); font-size: 12px; font-weight: 600;
}
.hero-actions { display: flex; justify-content: center; gap: 10px; }
.hero-actions .primary-action, .cta-section .primary-action { min-height: 44px; padding: 12px 20px; font-size: 14px; }

/* ---------- 产品预览 ---------- */
.product-preview {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) 300px;
  width: min(1040px, 100%); overflow: hidden;
  border: 1px solid var(--line); border-radius: 22px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 24px 80px rgba(17, 24, 39, .11);
}
.preview-main { min-width: 0; }
.preview-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--line);
}
.preview-toolbar span { color: var(--text); font-weight: 600; }
.preview-toolbar strong { padding: 2px 8px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 12px; }
.preview-toolbar small { margin-left: auto; color: var(--muted); }
.preview-prompt {
  display: flex; align-items: flex-start; gap: 8px;
  margin: 16px 18px; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg); color: var(--body); font-size: 13px; line-height: 1.6;
}
.preview-prompt svg { flex: none; margin-top: 2px; color: var(--primary); }
.preview-table-wrap { overflow-x: auto; }
.preview-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.preview-table th, .preview-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); }
.preview-table th { color: var(--muted); font-weight: 600; }
.preview-table td { color: var(--body); }
.preview-table td:first-child { display: flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; white-space: nowrap; }
.mini-logo {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 7px;
  background: var(--primary-soft); color: var(--primary); font-size: 10px; font-weight: 700;
}
.badge-success {
  padding: 2px 8px; border-radius: 999px;
  background: rgba(22, 163, 74, .1); color: var(--success);
  font-size: 11px; font-weight: 600;
}
.preview-strategy-panel { padding: 18px; border-left: 1px solid var(--line); background: var(--bg); }
.preview-strategy-panel > div { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.preview-strategy-panel strong { font-size: 13px; }
.preview-strategy-panel small { width: 100%; color: var(--muted); font-size: 11px; }
.thinking-pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--primary);
  animation: pulse 1.6s var(--ease) infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
.preview-strategy-panel dl { margin: 16px 0 0; }
.preview-strategy-panel dt { color: var(--muted); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.preview-strategy-panel dd { margin: 4px 0 14px; color: var(--body); font-size: 12px; line-height: 1.6; }

/* ---------- 通用区块 ---------- */
.landing-section { max-width: 1160px; margin: 0 auto; padding: 72px 24px; }
.section-heading { max-width: 640px; margin: 0 auto 40px; text-align: center; }
.section-heading h2 { margin: 0 0 12px; font-size: 32px; letter-spacing: -.01em; }
.section-heading p { margin: 0; color: var(--body); line-height: 1.7; }

/* ---------- 流程 ---------- */
.sequence-card {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding: 32px; border: 1px solid var(--line); border-radius: var(--radius-xl);
  background: var(--panel); box-shadow: var(--shadow);
}
.sequence-card article { position: relative; }
.sequence-card article > span { color: var(--primary); font-size: 12px; font-weight: 600; }
.sequence-card article strong { display: block; margin: 8px 0; font-size: 15px; }
.sequence-card article p { margin: 0; color: var(--body); font-size: 13px; line-height: 1.65; }
.sequence-stats {
  grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 8px; padding-top: 24px; border-top: 1px solid var(--line); text-align: center;
}
.sequence-stats strong { display: block; font-size: 24px; }
.sequence-stats span { color: var(--muted); font-size: 12px; }

/* ---------- 功能 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--panel); box-shadow: var(--shadow);
  transition: box-shadow .18s var(--ease), transform .18s var(--ease);
}
.feature-card:hover { box-shadow: var(--shadow-soft); transform: translateY(-2px); }
.feature-card small { color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.feature-card svg { display: block; margin: 14px 0 12px; color: var(--primary); }
.feature-card strong { display: block; margin-bottom: 8px; font-size: 16px; }
.feature-card p { margin: 0; color: var(--body); font-size: 13px; line-height: 1.7; }

/* ---------- 集成跑马灯 ---------- */
.integration-marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.integration-marquee > div { display: flex; gap: 12px; width: max-content; animation: marquee 32s linear infinite; }
.integration-marquee span {
  padding: 10px 18px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--panel); color: var(--body); font-size: 13px; font-weight: 600; white-space: nowrap;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .integration-marquee > div { animation: none; }
  .thinking-pulse { animation: none; }
}

/* ---------- 场景 ---------- */
.use-case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.use-case-grid article { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--panel); }
.use-case-grid strong { display: block; margin-bottom: 10px; font-size: 15px; }
.use-case-grid p { margin: 0; color: var(--body); font-size: 13px; line-height: 1.65; }

/* ---------- 定价 ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: start; }
.pricing-card {
  position: relative; padding: 28px;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--panel); box-shadow: var(--shadow);
}
.pricing-card.popular { border-color: var(--primary); box-shadow: 0 18px 48px rgba(139, 92, 246, .16); }
.pricing-card .popular-tag {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  padding: 3px 12px; border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-size: 11px; font-weight: 600;
}
.pricing-card h3 { margin: 0; font-size: 18px; }
.pricing-card .subtitle { margin: 4px 0 18px; color: var(--muted); font-size: 12px; }
.pricing-card .price { font-size: 34px; font-weight: 700; letter-spacing: -.02em; }
.pricing-card .price small { color: var(--muted); font-size: 13px; font-weight: 500; }
.pricing-card dl { margin: 20px 0; padding-top: 16px; border-top: 1px solid var(--line); }
.pricing-card .row { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; font-size: 12.5px; }
.pricing-card .row dt { color: var(--muted); }
.pricing-card .row dd { margin: 0; color: var(--text); font-weight: 600; }
.pricing-card .btn { width: 100%; }
.payment-strip { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.payment-strip span { padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); color: var(--body); font-size: 12px; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 12px; max-width: 820px; margin: 0 auto; }
.faq-list article { padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--panel); }
.faq-list strong { display: block; margin-bottom: 8px; font-size: 15px; }
.faq-list p { margin: 0; color: var(--body); font-size: 13px; line-height: 1.7; }

/* ---------- CTA / 页脚 ---------- */
.cta-section { max-width: 1160px; margin: 0 auto; padding: 88px 24px; text-align: center; }
.cta-section h2 { margin: 0 0 14px; font-size: 34px; letter-spacing: -.01em; }
.cta-section p { margin: 0 auto 28px; max-width: 560px; color: var(--body); line-height: 1.7; }
.site-footer {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  max-width: 1160px; margin: 0 auto; padding: 32px 24px;
  border-top: 1px solid var(--line); color: var(--muted); font-size: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .product-preview { grid-template-columns: 1fr; }
  .preview-strategy-panel { border-left: 0; border-top: 1px solid var(--line); }
  .sequence-card, .feature-grid, .use-case-grid, .pricing-grid { grid-template-columns: 1fr 1fr; }
  .sequence-stats { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .site-nav { grid-template-columns: 1fr auto; height: auto; padding: 12px 16px; }
  .site-links { display: none; }
  .hero-section { padding: 64px 20px 48px; }
  .hero-copy h1 { font-size: 34px; }
  .sequence-card, .feature-grid, .use-case-grid, .pricing-grid { grid-template-columns: 1fr; }
  .top-announcement strong { display: none; }
}