/* ============================================
   首页样式 — Airbnb Design 标准
   干净画布 · 1px发丝边框 · 柔和圆角 · 大留白
   ============================================ */

/* ===== Hero ===== */
.home-hero {
  min-height: calc(100vh - var(--header-h, 80px));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px;
  background: var(--canvas, #fff);
}
.hero-content {
  max-width: 720px;
  animation: staggerInUp 0.8s var(--ease) both;
}
.hero-tagline {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-bottom: 24px;
  text-transform: none;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 8vw, 4.5rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--ink-soft);
  margin-bottom: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.hero-slogan {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto 40px;
}
.hero-cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* ===== 统计数据 ===== */
.home-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}
.stat-item {
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -8px;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: var(--hairline, var(--rule));
}
.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  color: var(--gold);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-top: 4px;
  font-weight: 500;
}
.stat-sub {
  font-size: 0.72rem;
  color: var(--muted-soft, var(--muted-dim));
  margin-top: 2px;
}

/* ===== 痛点 ===== */
.home-pain {
  background: var(--surface, var(--bg-warm));
  padding: 64px 0;
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.pain-card {
  background: var(--canvas, var(--bg-card));
  border: 1px solid var(--hairline, var(--rule));
  border-radius: 14px;
  padding: 28px;
  transition: transform 250ms var(--ease), box-shadow 250ms var(--ease);
  position: relative;
}
.pain-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.pain-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: var(--gold-bg);
  margin-bottom: 16px;
}
.pain-icon svg {
  color: var(--gold);
}
.pain-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}
.pain-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
}
.pain-highlight {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 14px;
  background: var(--gold-bg);
  color: var(--gold);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ===== 模块展示 ===== */
.home-modules {
  padding: 64px 0;
  background: var(--canvas, #fff);
}
.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.module-card {
  background: var(--canvas, var(--bg-card));
  border: 1px solid var(--hairline, var(--rule));
  border-radius: 14px;
  padding: 28px;
  transition: transform 250ms var(--ease), box-shadow 250ms var(--ease);
  cursor: pointer;
  position: relative;
}
.module-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.module-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.module-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--gold-soft);
  line-height: 1;
}
.module-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--gold-bg);
}
.module-icon svg {
  color: var(--gold);
}
.module-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
}
.module-card > p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.module-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.module-feature {
  padding: 4px 12px;
  background: var(--surface-strong, var(--bg-warm));
  border-radius: 9999px;
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.module-arrow {
  position: absolute;
  top: 20px;
  right: 20px;
  color: var(--muted-soft, var(--muted-dim));
  display: flex;
  align-items: center;
  transition: color 250ms var(--ease), transform 250ms var(--ease);
}
.module-arrow svg {
  color: inherit;
}
.module-card:hover .module-arrow {
  color: var(--gold);
  transform: translateX(4px);
}

/* ===== 差异化 ===== */
.home-diff {
  background: var(--surface, var(--bg-warm));
  padding: 64px 0;
}
.diff-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}
.diff-card {
  text-align: center;
  padding: 24px 16px;
  transition: transform 250ms var(--ease);
}
.diff-card:hover {
  transform: translateY(-2px);
}
.diff-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: var(--gold-bg);
  margin-bottom: 12px;
}
.diff-icon svg {
  color: var(--gold);
}
.diff-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}
.diff-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ===== CTA ===== */
.home-cta {
  padding: 80px 24px;
  text-align: center;
  background: var(--canvas, #fff);
}
.cta-content {
  max-width: 640px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--ink);
  text-wrap: balance;
}
.cta-content h2 .gold { color: var(--gold); }
.cta-content p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .home-hero { padding: 56px 20px; }
  .hero-cta-row { flex-direction: column; align-items: stretch; }
  .hero-cta-row .btn { width: 100%; }
  .home-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 16px;
  }
  .stat-item::after { display: none; }
  .pain-grid { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .diff-grid { grid-template-columns: 1fr; }
  .home-stats { grid-template-columns: 1fr 1fr; }
}