/* ============================================
   馨家捷家政服务平台 - 全局样式
   ============================================ */

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

:root {
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #EAF2FF;
  --color-accent: #3B82F6;
  --color-bg: #F7F9FC;
  --color-white: #FFFFFF;
  --color-text: #1F2937;
  --color-text-secondary: #64748B;
  --color-border: #E5EAF0;
  --color-success: #10B981;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: all 0.25s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* ============================================
   Header / Navigation
   ============================================ */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: bold;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
  color: white;
}

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

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 8px 14px;
}

.btn-ghost:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 40px 24px 24px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.footer-col a:hover {
  color: var(--color-primary);
}

/* 服务分类：两列排布 */
.footer-links-2col {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  column-gap: 24px;
  row-gap: 8px;
}

.footer-links-2col a {
  margin-bottom: 0;
}

.footer-bottom {
  width: 100vw;
  margin: 32px calc(50% - 50vw) 0;
  padding: 18px 24px;
  background: var(--color-primary);
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.5px;
}

/* ============================================
   Container
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Card
   ============================================ */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* ============================================
   Form Elements
   ============================================ */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-text);
  transition: var(--transition);
  outline: none;
  font-family: inherit;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-input::placeholder {
  color: #B2BEC3;
}

/* ============================================
   Tags / Badges
   ============================================ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 20px;
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.tag-green {
  background: #E8F8EF;
  color: var(--color-success);
}

.tag-gold {
  background: #FFF5E0;
  color: #C77D15;
}

/* ============================================
   Utility
   ============================================ */
.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .header-nav {
    display: none;
  }

  .container {
    padding: 0 16px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
  }
}