/* ====== 落地页专属样式 ====== */
.landing {
  max-width: var(--max-width);
  margin: 0 auto;
  background: #fff;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 顶部导航 */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, box-shadow .2s;
}
.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, .05);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; }
.brand-icon { font-size: 22px; }
.brand-name { color: var(--text); }
.nav-cta {
  padding: 8px 16px;
  border-radius: 20px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
}
.nav-cta:active { transform: scale(.96); }

/* Hero */
.hero {
  position: relative;
  padding: 48px 24px 44px;
  background: linear-gradient(180deg, var(--primary-light) 0%, #fff 100%);
  overflow: hidden;
}
.hero-inner { position: relative; z-index: 2; }
.badge {
  display: inline-block;
  padding: 5px 12px;
  background: rgba(232, 115, 42, .12);
  color: var(--primary-dark);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--text);
  letter-spacing: -.5px;
}
.hero-sub {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 340px;
}
.hero-cta { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.btn-hero {
  display: inline-block;
  padding: 14px 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 26px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(232, 115, 42, .35);
  transition: transform .15s;
}
.btn-hero:active { transform: scale(.97); }
.btn-hero.light { background: #fff; color: var(--primary); box-shadow: 0 6px 20px rgba(0, 0, 0, .15); }
.btn-text {
  color: var(--text-light);
  font-size: 14px;
  padding: 6px;
}
.hero-deco {
  position: absolute;
  right: -60px;
  top: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 115, 42, .18), transparent 70%);
  z-index: 1;
}

/* 区块标题 */
.section-head { text-align: center; padding: 40px 24px 20px; }
.section-head h2 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.section-head p { font-size: 14px; color: var(--text-light); }

/* 痛点 */
.pains { padding: 0 18px 20px; }
.pain-list { display: flex; flex-direction: column; gap: 12px; }
.pain-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pain-emoji { font-size: 32px; }
.pain-card h3 { font-size: 16px; font-weight: 600; }
.pain-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* 功能特色 */
.features { padding: 0 18px 20px; }
.feature-item {
  display: flex;
  gap: 14px;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
}
.feature-item:last-child { border-bottom: none; }
.feature-item.highlight {
  background: linear-gradient(135deg, var(--primary-light), #fff5ee);
  border-radius: var(--radius);
  border-bottom: none;
  margin: 8px 0;
}
.feature-item.ai-highlight {
  background: linear-gradient(135deg, #f3e8ff 0%, #fce7f3 100%);
  border-radius: var(--radius);
  border-bottom: none;
  margin: 8px 0;
  position: relative;
  overflow: hidden;
}
.feature-item.ai-highlight::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(139, 92, 246, .15), transparent 70%);
  border-radius: 50%;
}
.feature-item.ai-highlight .feature-num {
  color: #8b5cf6;
  font-size: 22px;
}
.feature-item.ai-highlight .feature-body h3 { color: #5b21b6; }
.feature-num {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
  width: 36px;
}
.feature-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.feature-body p { font-size: 13px; color: var(--text-light); line-height: 1.7; }
.hot {
  font-size: 11px;
  background: var(--primary);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}
.hot.new {
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
}

/* 使用流程 */
.flow { padding: 0 18px 30px; }
.flow-list {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 20px 12px;
}
.flow-step { text-align: center; flex: 1; }
.flow-no {
  display: inline-flex;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-bottom: 8px;
}
.flow-step p { font-size: 12px; color: var(--text); }
.flow-arrow { color: var(--text-light); font-size: 18px; }

/* 底部 CTA */
.cta-final {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  text-align: center;
  padding: 44px 24px;
  margin: 20px 18px 0;
  border-radius: 20px;
}
.cta-final h2 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.cta-final p { font-size: 14px; opacity: .9; margin-bottom: 20px; }

/* 页脚 */
.footer { text-align: center; padding: 30px 20px 40px; color: var(--text-light); font-size: 12px; }

/* 滚动渐入 */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }