/* =============================================
   style.css - 速递查 快递查询网站模板
   设计风格：现代、圆润、蓝紫渐变、卡片质感
   ============================================= */

:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --radius: 20px;
  --radius-sm: 12px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  color: var(--text-primary);
}

.main-nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 4px;
  transition: var(--transition);
}

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 998;
}

/* ---------- Hero 区域 ---------- */
.hero {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #f0fdfa 100%);
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

/* 搜索框 */
.search-box {
  max-width: 680px;
  margin: 0 auto;
}

.search-wrapper {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  border-radius: 60px;
  padding: 6px 6px 6px 20px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.search-wrapper:focus-within {
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2), var(--shadow-md);
  border-color: var(--primary-light);
}

.search-icon {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-right: 12px;
}

#trackingInput {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  padding: 12px 0;
  background: transparent;
  font-family: inherit;
}

#trackingInput::placeholder {
  color: var(--text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 28px;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

/* 快捷chip */
.search-quick {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.chip {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  color: var(--text-secondary);
}

.chip:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

/* ---------- 结果卡片 ---------- */
.result-section {
  padding: 40px 0 20px;
}

.result-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 32px 32px 28px;
  border: 1px solid var(--border);
  animation: fadeUp 0.4s ease;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.result-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.result-tracking {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
}

.result-carrier {
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent);
  padding: 8px 18px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 状态条 */
.result-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
}

.status-item i {
  font-size: 1.1rem;
}

.status-item.active {
  color: var(--primary);
}

.status-item.delivered {
  color: var(--primary);
}

.status-divider {
  flex: 1;
  min-width: 20px;
  height: 2px;
  background: var(--border);
  border-radius: 4px;
  margin: 0 8px;
}

/* 时间线 */
.result-timeline {
  margin: 20px 0 24px;
}

.timeline-item {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-left: 2px solid var(--border);
  padding-left: 20px;
  position: relative;
}

.timeline-item:first-child {
  border-left-color: var(--primary);
}

.timeline-item:last-child {
  border-left: 2px solid transparent;
}

.timeline-dot {
  position: absolute;
  left: -6px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.timeline-item:first-child .timeline-dot {
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.timeline-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  min-width: 80px;
  flex-shrink: 0;
}

.timeline-desc {
  font-weight: 500;
  color: var(--text-primary);
}

.timeline-location {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 8px;
}

/* ---------- 快递公司网格 ---------- */
.features-section {
  padding: 60px 0 80px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--text-primary);
}

.carrier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 20px;
}

.carrier-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 12px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  cursor: default;
}

.carrier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.carrier-card i {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--primary);
}

.carrier-card span {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ---------- 底部 ---------- */
.site-footer {
  margin-top: auto;
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 28px 0;
  text-align: center;
  font-size: 0.9rem;
}

.footer-meta {
  margin-top: 6px;
  font-size: 0.8rem;
  opacity: 0.5;
}

/* ---------- 动画 ---------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -280px;
    width: 260px;
    height: 100vh;
    flex-direction: column;
    background: var(--card-bg);
    padding: 80px 32px 32px;
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
    transition: right 0.35s ease;
    z-index: 999;
    gap: 24px;
  }

  .main-nav.open {
    right: 0;
  }

  .overlay.open {
    display: block;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .search-wrapper {
    flex-direction: column;
    border-radius: var(--radius-sm);
    padding: 8px 12px 12px;
    background: var(--card-bg);
  }

  .search-icon {
    display: none;
  }

  #trackingInput {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
  }

  .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 14px;
  }

  .result-card {
    padding: 20px;
  }

  .result-status-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-divider {
    width: 2px;
    height: 12px;
    min-width: unset;
    margin: 4px 0 4px 10px;
  }

  .carrier-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .result-tracking {
    font-size: 1.2rem;
  }

  .timeline-time {
    min-width: 60px;
    font-size: 0.75rem;
  }
}