/* ============================================================
   A2A Hub V2.2 — Marketplace Styles
   视觉硬规范：鎏金 #E6C26E + 信任蓝 #4A90E2 + 深背景 #090E1A
   ============================================================ */

/* === CSS Variables === */
:root {
  --gold: #f0d26b;
  --gold-dark: #e0b96a;
  --blue: #4A90E2;
  --bg-deep: #090E1A;
  --bg-card: rgba(13, 21, 37, 0.85);
  --bg-card-hover: rgba(17, 28, 48, 0.95);
  --bg-section: rgba(13, 21, 37, 0.5);
  --text-primary: #E8ECF1;
  --text-secondary: #BCC5D0;
  --text-muted: #9AA3B0;
  --border: rgba(255, 255, 255, 0.06);
  --border-gold: rgba(230, 194, 110, 0.15);
  --border-blue: rgba(74, 144, 226, 0.2);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

/* === Reset & Base === */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === Navigation === */
.mp-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(9, 14, 26, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.mp-nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mp-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 18px;
}
.mp-logo svg { width: 36px; height: 36px; }
.mp-logo span { letter-spacing: 1px; }

.mp-nav-tabs {
  display: flex;
  gap: 4px;
}
.mp-nav-tab {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  border: none;
  text-decoration: none;
}
.mp-nav-tab:hover { color: var(--gold); background: rgba(230, 194, 110, 0.06); }
.mp-nav-tab.active {
  color: var(--gold);
  background: rgba(230, 194, 110, 0.1);
}

.mp-nav-cta {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  text-decoration: none;
  transition: var(--transition);
}
.mp-nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

/* === Hero === */
.mp-hero {
  padding: 140px 32px 80px;
  text-align: center;
  position: relative;
}
.mp-hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(230, 194, 110, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.mp-hero-badge {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--gold);
  background: rgba(230, 194, 110, 0.08);
  border: 1px solid var(--border-gold);
  margin-bottom: 20px;
}
.mp-hero h1 {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
  line-height: 1.2;
}
.mp-hero h1 .gold { color: var(--gold); }
.mp-hero h1 .blue { color: var(--blue); }
.mp-hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* === Category Filter Tabs === */
.mp-categories {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.mp-cat-btn {
  padding: 10px 28px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.mp-cat-btn:hover { border-color: var(--gold); color: var(--gold); }
.mp-cat-btn.active {
  background: rgba(230, 194, 110, 0.08);
  border-color: var(--gold);
  color: var(--gold);
}

/* === Agent Grid === */
.mp-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
.mp-section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}
.mp-section-sub {
  font-size: 15px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 48px;
}

.mp-agent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 80px;
}

/* === Agent Card === */
.mp-agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
}
.mp-agent-card:hover {
  border-color: rgba(230, 194, 110, 0.25);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(230, 194, 110, 0.04);
}

/* Card Header */
.mp-card-header {
  padding: 28px 28px 0;
  position: relative;
}
.mp-card-protocol {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.mp-card-protocol.openai { background: rgba(74, 144, 226, 0.12); color: #4A90E2; }
.mp-card-protocol.anthropic { background: rgba(212, 160, 80, 0.12); color: #e0b96a; }

.mp-card-id {
  font-size: 11px;
  color: var(--text-muted);
  font-family: "SF Mono", "Consolas", monospace;
  margin-bottom: 8px;
}
.mp-card-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.mp-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* Industry Tags */
.mp-card-industries {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.mp-industry-tag {
  padding: 3px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}
.mp-industry-tag.store { background: rgba(230, 194, 110, 0.08); color: var(--gold); }
.mp-industry-tag.retail { background: rgba(74, 144, 226, 0.08); color: var(--blue); }
.mp-industry-tag.food { background: rgba(124, 197, 118, 0.08); color: #7CC576; }
.mp-industry-tag.beauty { background: rgba(155, 89, 182, 0.08); color: #9B59B6; }

/* Divider */
.mp-card-divider {
  height: 1px;
  background: var(--border);
  margin: 20px 28px;
}

/* Skills Section */
.mp-card-body {
  padding: 0 28px 20px;
}
.mp-skills-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.mp-skill-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mp-skill-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.03);
  transition: var(--transition);
}
.mp-skill-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-gold);
}
.mp-skill-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 1px;
}
.mp-skill-icon.gold { background: rgba(230, 194, 110, 0.12); color: var(--gold); }
.mp-skill-icon.blue { background: rgba(74, 144, 226, 0.12); color: var(--blue); }
.mp-skill-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.mp-skill-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Card Footer (Pricing) */
.mp-card-footer {
  padding: 16px 28px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.mp-pricing {
  display: flex;
  flex-direction: column;
}
.mp-price-call {
  font-size: 18px;
  font-weight: 700;
  color: var(--gold);
}
.mp-price-call span { font-size: 12px; font-weight: 400; color: var(--text-muted); }
.mp-price-token {
  font-size: 12px;
  color: var(--text-muted);
}
.mp-card-btn {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid var(--border-gold);
  background: transparent;
  color: var(--gold);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.mp-card-btn:hover {
  background: rgba(230, 194, 110, 0.08);
}

/* === Code Examples Section === */
.mp-code-section {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.mp-code-header {
  text-align: center;
  margin-bottom: 48px;
}
.mp-code-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}
.mp-code-tab {
  padding: 8px 24px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.mp-code-tab:hover { color: var(--gold); }
.mp-code-tab.active {
  background: rgba(230, 194, 110, 0.08);
  border-color: var(--gold);
  color: var(--gold);
}

.mp-code-blocks {
  max-width: 900px;
  margin: 0 auto;
}
.mp-code-block {
  display: none;
  background: rgba(13, 21, 37, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  font-family: "SF Mono", "Consolas", "Fira Code", monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.mp-code-block.active { display: block; }
.mp-code-block .kw { color: var(--gold-dark); font-weight: 600; }
.mp-code-block .str { color: #7CC576; }
.mp-code-block .fn { color: var(--blue); }
.mp-code-block .cm { color: var(--text-muted); font-style: italic; }
.mp-code-block .num { color: #9B59B6; }
.mp-code-block .prop { color: var(--gold); }

.mp-code-agent-select {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.mp-code-agent-btn {
  padding: 6px 16px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.mp-code-agent-btn:hover, .mp-code-agent-btn.active {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(230, 194, 110, 0.06);
}

/* === Footer === */
.mp-footer {
  padding: 48px 32px 32px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.mp-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.mp-footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.mp-footer-links a {
  color: var(--text-muted);
  font-size: 13px;
  text-decoration: none;
  transition: var(--transition);
}
.mp-footer-links a:hover { color: var(--gold); }
.mp-footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}
.mp-footer-copy span { color: var(--gold); }

/* === Responsive === */
@media (max-width: 1024px) {
  .mp-agent-grid { grid-template-columns: repeat(2, 1fr); }
  .mp-hero h1 { font-size: 42px; }
  .mp-nav-tabs { display: none; }
}

@media (max-width: 768px) {
  .mp-agent-grid { grid-template-columns: 1fr; }
  .mp-hero h1 { font-size: 32px; }
  .mp-hero { padding: 120px 20px 60px; }
  .mp-container { padding: 0 20px; }
  .mp-nav-inner { padding: 0 16px; }
  .mp-card-header { padding: 22px 22px 0; }
  .mp-card-body { padding: 0 22px 16px; }
  .mp-card-divider { margin: 16px 22px; }
  .mp-card-footer { padding: 14px 22px; flex-direction: column; align-items: flex-start; }
  .mp-code-block { padding: 18px; font-size: 11px; }
}