/*
Theme Name: GreenLeaf Tech
Theme URI: https://greenleaftech.com
Author: Your Name
Author URI: https://yourwebsite.com
Description: 专为绿叶科技打造的现代环保主题，支持双语、响应式设计
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: greenleaf-tech
Tags: business, eco-friendly, responsive, custom-colors, translation-ready
*/

/* ===========================
   CSS Variables
   =========================== */
:root {
  --color-primary: #2ECC71;
  --color-secondary: #27AE60;
  --color-accent: #F39C12;
  --color-background: #ECF0F1;
  --color-text: #2C3E50;
  --color-white: #FFFFFF;
  --color-light-gray: #BDC3C7;
  
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  
  --container-width: 1200px;
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

/* ===========================
   Reset & Base Styles
   =========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a:hover {
  color: var(--color-secondary);
}

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

/* ===========================
   Layout
   =========================== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

/* ===========================
   Header
   =========================== */
.site-header {
  background-color: var(--color-white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.site-logo img {
  height: 50px;
}

/* ===========================
   Navigation
   =========================== */
.main-navigation ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
}

.main-navigation a {
  color: var(--color-text);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
}

.main-navigation a:hover,
.main-navigation .current-menu-item a {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* ===========================
   Hero Section
   =========================== */
.hero-slider {
  position: relative;
  height: 600px;
  overflow: hidden;
}

.hero-slide {
  position: relative;
  height: 100%;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  text-align: center;
  color: var(--color-white);
  z-index: 2;
}

.hero-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(46, 204, 113, 0.3);
}

/* ===========================
   Cards
   =========================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.card-image {
  height: 200px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-md);
}

/* ===========================
   Footer
   =========================== */
.site-footer {
  background-color: var(--color-text);
  color: var(--color-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-widgets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  
  .main-navigation ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .hero-slider {
    height: 400px;
  }
  
  .section {
    padding: var(--spacing-md) 0;
  }
}