*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0B0F14;
  --surface: #131920;
  --surface2: #1A2230;
  --border: #1E2A3A;
  --text: #E8EDF3;
  --text-muted: #6B7C93;
  --accent: #10B981;
  --accent-dim: rgba(16, 185, 129, 0.12);
  --tag-price: #F59E0B;
  --tag-price-bg: rgba(245, 158, 11, 0.1);
  --tag-stock: #EF4444;
  --tag-stock-bg: rgba(239, 68, 68, 0.1);
  --tag-content: #8B5CF6;
  --tag-content-bg: rgba(139, 92, 246, 0.1);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-display);
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
  50% { box-shadow: 0 0 0 5px rgba(16,185,129,0); }
}

/* HERO */
.hero {
  padding: 80px 40px 100px;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}
.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 480px;
}

/* MONITOR FRAME */
.monitor-frame {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03) inset;
}
.monitor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}
.monitor-dots {
  display: flex;
  gap: 6px;
}
.monitor-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}
.monitor-dots span:first-child { background: #FF5F57; }
.monitor-dots span:nth-child(2) { background: #FEBC2E; }
.monitor-dots span:last-child { background: #28C840; }
.monitor-title {
  font-size: 0.72rem;
  font-family: var(--font-display);
  color: var(--text-muted);
}
.monitor-body {
  padding: 20px 20px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.feed-line {
  display: grid;
  grid-template-columns: 40px 120px 1fr;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-family: var(--font-display);
  align-items: center;
  background: var(--surface2);
  border: 1px solid transparent;
}
.feed-line:not(:last-child) { margin-bottom: 4px; }
.feed-done { opacity: 0.45; }
.feed-time { color: var(--text-muted); font-size: 0.7rem; }
.feed-tag { color: var(--accent); font-size: 0.72rem; }
.feed-event { color: var(--text); }
.monitor-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}
.pulse-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-family: var(--font-display);
  color: var(--text-muted);
}
.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* HOW IT WORKS */
.works {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.works-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.works-heading {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 60px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.step {
  padding: 36px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
}
.step-num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.step p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ACTIVITY FEED */
.feed-section {
  padding: 100px 40px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.feed-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.feed-header {
  margin-bottom: 56px;
}
.feed-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}
.feed-sub {
  font-size: 1rem;
  color: var(--text-muted);
}
.feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.feed-card {
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.2s;
}
.feed-card:hover { border-color: var(--text-muted); }
.card-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 14px;
}
.card-tag--price { color: var(--tag-price); background: var(--tag-price-bg); }
.card-tag--stock { color: var(--tag-stock); background: var(--tag-stock-bg); }
.card-tag--content { color: var(--tag-content); background: var(--tag-content-bg); }
.card-tag--法规 { color: #F59E0B; background: rgba(245,158,11,0.1); }
.card-tag--product { color: #06B6D4; background: rgba(6,182,212,0.1); }
.card-tag--career { color: #EC4899; background: rgba(236,72,153,0.1); }
.card-url {
  font-size: 0.78rem;
  font-family: var(--font-display);
  color: var(--text-muted);
  margin-bottom: 10px;
}
.card-change {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ACTIONS */
.actions-section {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.actions-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 80px;
  align-items: start;
}
.actions-heading {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.15;
}
.actions-sub {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-muted);
}
.actions-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.action-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.action-item:first-child { border-top: 1px solid var(--border); }
.action-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.action-item h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.action-item p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* MANIFESTO */
.manifesto {
  padding: 100px 40px;
  border-bottom: 1px solid var(--border);
}
.manifesto-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.manifesto-quote {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 500;
  line-height: 1.5;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  font-style: italic;
  border: none;
  padding: 0;
}
.manifesto-cta {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* FOOTER */
.footer {
  padding: 40px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.wordmark--footer {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}
.footer-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}
.footer-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-family: var(--font-display);
  color: var(--text-muted);
}
.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* MOBILE */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 60px 24px 80px; }
  .steps { grid-template-columns: 1fr; }
  .feed-grid { grid-template-columns: 1fr; }
  .actions-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { flex-direction: column; gap: 24px; align-items: flex-start; }
  .footer-meta { align-items: flex-start; }
  .works, .feed-section, .actions-section, .manifesto { padding: 60px 24px; }
  .nav { padding: 0 24px; }
  .feed-line { grid-template-columns: 36px 90px 1fr; gap: 8px; }
  .feed-event { font-size: 0.7rem; }
}