/*
Theme Name: ERDU Lighting
Theme URI: https://www.erduled.com/
Author: ERDU Lighting Technology Co., Ltd.
Author URI: https://www.erduled.com/
Description: Custom WordPress theme for ERDU Lighting — Professional 48V Magnetic Track Light Manufacturer. Hermes orange color scheme, fully responsive, ACF Pro ready.
Version: 1.10.42
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: erdu-wp
Domain Path: /languages
Tags: custom-theme, responsive, orange, lighting, b2b
*/

/* ===== CSS Variables - Hermes Orange Theme ===== */
:root {
  --erdu-orange: #F37021;
  --erdu-orange-dark: #D45A0F;
  --erdu-orange-light: #FFF5ED;
  --erdu-orange-hover: #E06010;
  --erdu-navy: #2D1810;
  --erdu-navy-light: #4A2510;
  --erdu-text: #333333;
  --erdu-text-light: #666666;
  --erdu-gray: #F5F5F5;
  --erdu-gray-dark: #E0E0E0;
  --erdu-border: #E8E8E8;
  --erdu-white: #FFFFFF;
  --erdu-success: #22C55E;
  --erdu-error: #EF4444;
}

/* ===== Reset & Base ===== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--erdu-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ===== Container ===== */
.erdu-container {
  max-width: 1760px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .erdu-container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .erdu-container {
    padding-left: 3rem;
    padding-right: 3rem;
  }
}

@media (min-width: 1536px) {
  .erdu-container {
    padding-left: 4rem;
    padding-right: 4rem;
  }
}

/* ===== Typography ===== */
.erdu-h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--erdu-text);
}

.erdu-h2 {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--erdu-text);
}

.erdu-h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--erdu-text);
}

/* ===== Buttons ===== */
.erdu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

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

.erdu-btn-primary:hover {
  background-color: var(--erdu-orange-hover);
}

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

.erdu-btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

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

.erdu-btn-white:hover {
  background-color: var(--erdu-gray);
}

/* ===== Sections ===== */
.erdu-section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

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

.erdu-bg-gradient {
  background: linear-gradient(135deg, var(--erdu-navy) 0%, var(--erdu-navy-light) 100%);
}

.erdu-bg-gradient-orange {
  background: linear-gradient(135deg, var(--erdu-orange) 0%, var(--erdu-orange-dark) 100%);
}

/* ===== Cards ===== */
.erdu-card {
  background-color: var(--erdu-white);
  border: 1px solid var(--erdu-border);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.erdu-card:hover {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* ===== Tags / Badges ===== */
.erdu-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
}

.erdu-badge-orange {
  background-color: var(--erdu-orange);
  color: var(--erdu-white);
}

.erdu-badge-hot {
  background-color: #EF4444;
  color: var(--erdu-white);
}

.erdu-badge-new {
  background-color: var(--erdu-success);
  color: var(--erdu-white);
}

.erdu-badge-green {
  background-color: #ECFDF5;
  color: #059669;
}

.erdu-badge-gray {
  background-color: var(--erdu-gray);
  color: var(--erdu-text-light);
}

/* ===== FAQ Accordion ===== */
.erdu-faq-item {
  border: 1px solid var(--erdu-border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.erdu-faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 500;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--erdu-text);
  transition: background-color 0.2s;
}

.erdu-faq-question:hover {
  background-color: var(--erdu-gray);
}

.erdu-faq-answer {
  padding: 0 1rem 0.75rem;
  font-size: 0.875rem;
  color: var(--erdu-text-light);
  display: none;
}

.erdu-faq-answer.active {
  display: block;
}

/* ===== Forms ===== */
.erdu-input,
.erdu-select,
.erdu-textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid #D1D5DB;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  transition: border-color 0.2s;
  background-color: var(--erdu-white);
  color: var(--erdu-text);
}

.erdu-input:focus,
.erdu-select:focus,
.erdu-textarea:focus {
  outline: none;
  border-color: var(--erdu-orange);
}

.erdu-textarea {
  resize: vertical;
  min-height: 80px;
}

.erdu-checkbox {
  width: 1rem;
  height: 1rem;
  border-radius: 0.25rem;
  accent-color: var(--erdu-orange);
}

/* ===== Navigation ===== */
.erdu-nav-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.375rem;
  color: #374151;
  transition: all 0.2s;
}

.erdu-nav-link:hover,
.erdu-nav-link.active {
  color: var(--erdu-orange);
  background-color: var(--erdu-orange-light);
}

/* ===== Footer ===== */
.erdu-footer {
  background-color: #1a1a2e;
  color: #9CA3AF;
}

.erdu-footer a:hover {
  color: var(--erdu-white);
}

/* ===== Utilities ===== */
.erdu-text-orange {
  color: var(--erdu-orange);
}

.erdu-bg-orange-light {
  background-color: var(--erdu-orange-light);
}

.erdu-line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.erdu-line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Animation ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.erdu-animate-fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== Mobile Menu ===== */
/* JS toggle 使用 .is-open + max-height/opacity/visibility 控制展开收起，
   lg:hidden 控制桌面端隐藏，因此不再需要 display: none */

/* ===== Tab System ===== */
.erdu-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  color: #6B7280;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  cursor: pointer;
  transition: all 0.2s;
}

.erdu-tab-btn.active {
  color: var(--erdu-orange);
  border-bottom-color: var(--erdu-orange);
}

.erdu-tab-btn:hover {
  color: #374151;
}

.erdu-tab-panel {
  display: none;
}

.erdu-tab-panel.active {
  display: block;
}

/* ===== Breadcrumb ===== */
.erdu-breadcrumb {
  font-size: 0.875rem;
  color: #BFDBFE;
}

.erdu-breadcrumb a {
  color: #BFDBFE;
}

.erdu-breadcrumb a:hover {
  color: var(--erdu-white);
}

/* ===== Filter Pills ===== */
.erdu-filter-pill {
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  background-color: var(--erdu-gray);
  color: #4B5563;
}

.erdu-filter-pill:hover {
  background-color: #E5E7EB;
}

.erdu-filter-pill.active {
  background-color: var(--erdu-orange);
  color: var(--erdu-white);
}

/* ===== Quote Block ===== */
.erdu-quote {
  border-left: 4px solid var(--erdu-orange);
  padding-left: 1.5rem;
  font-style: italic;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .erdu-h1 {
    font-size: 1.875rem;
  }
  .erdu-h2 {
    font-size: 1.5rem;
  }
  .erdu-section {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
}

@media (max-width: 639px) {
  .erdu-h1 {
    font-size: 1.5rem;
  }
  .erdu-h2 {
    font-size: 1.25rem;
  }
}

/* ===== Print ===== */
@media print {
  .erdu-header,
  .erdu-footer,
  .erdu-mobile-toggle {
    display: none !important;
  }
}

/* ===== WordPress Default Overrides ===== */
.wp-caption {
  max-width: 100%;
}

.aligncenter {
  display: block;
  margin: 0 auto;
}

.gallery img {
  border: none !important;
}

/* ===== Accessibility ===== */
:focus-visible {
  outline: 2px solid var(--erdu-orange);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}