/*
Theme Name: GlobalBuild
Theme URI: https://globalbuild.com
Author: GlobalBuild Team
Author URI: https://globalbuild.com
Description: 外贸独立站服务商门户网站主题 - 专业建站与海外营销服务展示
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: globalbuild
Tags: business, corporate, responsive, custom-colors
*/

/* ============================================
   CSS Variables - Design System
   ============================================ */
:root {
  /* Background Colors */
  --background: hsl(220, 15%, 97%);
  --card: hsl(0, 0%, 100%);
  --foreground: hsl(220, 20%, 12%);
  --muted-foreground: hsl(220, 10%, 48%);
  
  /* Primary Colors */
  --primary: hsl(215, 75%, 42%);
  --primary-foreground: hsl(0, 0%, 100%);
  --accent: hsl(215, 70%, 96%);
  --accent-foreground: hsl(215, 75%, 42%);
  --border: hsl(220, 15%, 88%);
  
  /* Semantic Colors */
  --success: hsl(150, 65%, 42%);
  --warning: hsl(35, 85%, 48%);
  --destructive: hsl(0, 72%, 52%);
  
  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Layout */
  --content-max-width: 80rem; /* max-w-7xl */
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--foreground);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary);
  opacity: 0.9;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--foreground);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.875rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--muted-foreground);
}

.text-muted {
  color: var(--muted-foreground);
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 768px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.section {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

@media (min-width: 768px) {
  .section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
}

.section-spacing > * + * {
  margin-top: 4rem;
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  backdrop-filter: blur(12px);
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

@media (min-width: 768px) {
  .header-inner {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .header-inner {
    padding: 0 2rem;
  }
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.site-logo:hover {
  opacity: 1;
}

.main-navigation {
  display: none;
}

@media (min-width: 768px) {
  .main-navigation {
    display: flex;
    align-items: center;
    gap: 2rem;
  }
}

.main-navigation a {
  color: var(--foreground);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.2s ease;
}

.main-navigation a:hover,
.main-navigation a.active {
  color: var(--primary);
}

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width 0.2s ease;
}

.main-navigation a:hover::after,
.main-navigation a.active::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--foreground);
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 4rem;
  left: 0;
  right: 0;
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  box-shadow: var(--shadow-md);
}

.mobile-menu.active {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 0.75rem 0;
  color: var(--foreground);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  background-color: var(--primary);
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  opacity: 0.8;
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--card);
  color: var(--foreground);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
  border-color: var(--border);
}

.btn-ghost {
  background-color: transparent;
  color: var(--foreground);
}

.btn-ghost:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--primary-foreground);
  opacity: 0.05;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--primary), 0 0 0 4px rgba(37, 99, 235, 0.3);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
  opacity: 0.6;
  transform: translateY(-2px);
}

/* ============================================
   Form Elements
   ============================================ */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--foreground);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--foreground);
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--muted-foreground);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.form-input.error,
.form-textarea.error {
  border-color: var(--destructive);
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  color: var(--destructive);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.form-success {
  color: var(--success);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* ============================================
   Badges & Tags
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.badge-success {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--success);
}

.badge-warning {
  background-color: rgba(251, 146, 60, 0.1);
  color: var(--warning);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: 8rem;
  padding-bottom: 4rem;
  background: linear-gradient(to bottom, var(--background), var(--card));
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding-top: 10rem;
    padding-bottom: 6rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: var(--accent-foreground);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--foreground);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--muted-foreground);
  max-width: 48rem;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background-color: var(--card);
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}

.footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .footer-inner {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .footer-inner {
    padding: 0 2rem;
  }
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--foreground);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

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

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none; }
.block { display: block; }

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.3s ease-out;
}

/* ============================================
   WordPress Specific
   ============================================ */
.alignleft {
  float: left;
  margin-right: 1.5rem;
  margin-bottom: 1.5rem;
}

.alignright {
  float: right;
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.aligncenter {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1.5rem;
}

.wp-caption {
  max-width: 100%;
  margin-bottom: 1.5rem;
}

.wp-caption-text {
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.5rem;
}

.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
}