feat: initial commit - 汽车贴膜门店 WordPress 主题 (B2B Trade v2.0.0)

- WordPress classic theme for car tinting/foil shop
- 13 homepage template parts
- Customizer panel with 13 sections
- RFQ inquiry form handler
- Bootstrap 5.3 + AOS + Colorbox frontend
- 13 SVG placeholder images
- Chinese content defaults

404.php

@@ -0,0 +1,13 @@
+<?php
+/** Not-found template. @package Fragrance_Trade */
+get_header();
+?>
+<main id="primary" class="site-main container py-5 fragrance-content-area">
+	<section class="error-404 not-found text-center py-5">
+		<h1 class="display-4"><?php esc_html_e( '页面未找到', 'fragrance-trade' ); ?></h1>
+		<p><?php esc_html_e( '页面可能已迁移，请搜索网站或返回首页。', 'fragrance-trade' ); ?></p>
+		<div class="mx-auto my-4 fragrance-search-form"><?php get_search_form(); ?></div>
+		<a class="btn btn-dark" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php esc_html_e( '返回首页', 'fragrance-trade' ); ?></a>
+	</section>
+</main>
+<?php get_footer(); ?>