/*
 * Theme Name:       BN-Parts-Arabic
 * Theme URI:        https://example.com/bn-parts-arabic
 * Description:      B2B 工业 MRO 主题 —— 面向 Bently Nevada 备件供应商。现代标准阿拉伯语 RTL 布局、双语（阿/英）混排排版、工业级 SEO 与询盘转化优化。纯 CPT 询盘模式，不依赖 WooCommerce / 页面构建器。
 * Version:          1.0
 * Requires at least: 6.0
 * Tested up to:     6.5
 * Requires PHP:     7.4
 * Author:           BN Parts Engineering
 * Author URI:       https://example.com
 * License:          GNU GPL v2 or later
 * License URI:      https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:      bn-parts
 * Domain Path:      /languages
 * Tags:             rtl-language-support, custom-post-type, industrial, b2b, seo, responsive
 *
 * 设计决策（与 SEO / 转化相关）：
 * 1. 所有型号、零件号、技术代码一律走 <code class="ltr-part">，强制 unicode-bidi: embed + direction: ltr，
 *    避免阿拉伯语环境下数字/字母被反向渲染导致型号误读（如 3500/42M 不会被 RTL 翻转）。
 * 2. UI 字体 Tajawal（数字字母辨识度高）；技术参数表使用等宽 IBM Plex Mono 保证列对齐。
 * 3. 正文 ≥ 17px，型号 ≥ 16px 且加粗，降低相似型号（3500/42 vs 3500/44）视觉混淆。
 * 4. 去除非必要过渡动画，工业用户偏好高效直接（性能优化诉求）。
 */

/* ==========================================================================
   0. CSS 变量系统（工业风 + RTL 友好）
   ========================================================================== */
:root {
	/* 品牌色：Bently Nevada 工业蓝 + 安全警示橙（用于 CTA / 关键动作） */
	--bn-color-primary: #0a3d62;       /* 深工业蓝 —— 主色、标题、品牌 */
	--bn-color-primary-dark: #072a45;
	--bn-color-accent: #e67e22;        /* 警示橙 —— 询价 CTA、价格/库存强调 */
	--bn-color-accent-hover: #d35400;
	--bn-color-success: #1e8449;       /* 认证/可用状态（绿） */

	/* 中性色 */
	--bn-color-bg: #ffffff;
	--bn-color-surface: #f4f6f8;       /* 区块背景 */
	--bn-color-border: #d9dee3;
	--bn-color-text: #1b2733;          /* 主正文（深灰蓝，优于纯黑） */
	--bn-color-text-muted: #5b6b7b;    /* 次要文本 */
	--bn-color-code-bg: #eef2f6;       /* 型号代码底纹 */

	/* 排版 */
	--bn-font-ui: 'Tajawal', 'Segoe UI', Tahoma, sans-serif;
	--bn-font-mono: 'IBM Plex Mono', 'Courier New', monospace;

	/* 字号（满足正文 ≥17px / 型号 ≥16px 加粗） */
	--bn-fs-body: 17px;
	--bn-fs-body-sm: 15px;
	--bn-fs-code: 16px;
	--bn-fs-h1: 30px;
	--bn-fs-h2: 24px;
	--bn-fs-h3: 20px;

	/* 间距与圆角 */
	--bn-radius: 6px;
	--bn-gap: 1.25rem;
	--bn-container: 1200px;

	/* 触控最小目标（移动端 ≥48px） */
	--bn-tap: 48px;
}

/* ==========================================================================
   1. 基础重置 & RTL 根属性
   ========================================================================== */
*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	direction: rtl;
	/* lang="ar" 由 <html> 标签输出（见 header.php），这里兜底 */
	line-height: 1.6;
	-webkit-text-size-adjust: 100%;
	font-size: 100%;
}

body {
	margin: 0;
	font-family: var(--bn-font-ui);
	font-size: var(--bn-fs-body);
	color: var(--bn-color-text);
	background: var(--bn-color-bg);
	line-height: 1.7;
}

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

a {
	color: var(--bn-color-primary);
	text-decoration: none;
}
a:hover,
a:focus {
	color: var(--bn-color-accent);
	text-decoration: underline;
}

h1, h2, h3, h4 {
	color: var(--bn-color-primary);
	line-height: 1.3;
	margin: 0 0 0.6em;
	font-weight: 700;
}
h1 { font-size: var(--bn-fs-h1); }
h2 { font-size: var(--bn-fs-h2); }
h3 { font-size: var(--bn-fs-h3); }

/* ==========================================================================
   2. 双语混排核心：型号 / 零件号 / 技术代码
   --------------------------------------------------------------------------
   阿拉伯语正文为 RTL，但所有型号、SKU、MPN、技术单元必须为 LTR。
   统一用 <code class="ltr-part"> 包裹，并强制 embed + ltr。
   ========================================================================== */
code.ltr-part,
.ltr-part {
	direction: ltr;
	unicode-bidi: embed;
	font-family: var(--bn-font-mono);
	font-size: var(--bn-fs-code);
	font-weight: 700;
	color: var(--bn-color-primary-dark);
	background: var(--bn-color-code-bg);
	padding: 0.1em 0.45em;
	border-radius: 4px;
	white-space: nowrap;          /* 型号不被换行打断 */
	word-break: keep-all;
	display: inline-block;
}

/* 正文里内联出现的型号，略微缩小内边距以免打断阅读流 */
p code.ltr-part,
li code.ltr-part {
	font-size: 0.95em;
	vertical-align: baseline;
}

/* ==========================================================================
   3. 布局容器
   ========================================================================== */
.bn-container {
	width: 100%;
	max-width: var(--bn-container);
	margin-inline: auto;          /* RTL 下自动居中（逻辑属性） */
	padding-inline: 1rem;
}

.bn-site-header {
	background: var(--bn-color-primary);
	color: #fff;
}
.bn-site-header a { color: #fff; }

.bn-site-footer {
	background: var(--bn-color-primary-dark);
	color: #cdd9e3;
	padding: 2.5rem 0;
	margin-top: 3rem;
	font-size: var(--bn-fs-body-sm);
}
.bn-site-footer a { color: #cdd9e3; }

/* ==========================================================================
   4. 顶部全局搜索（型号模糊联想 + 零件号直达）
   ========================================================================== */
.bn-global-search {
	background: var(--bn-color-primary-dark);
	padding: 0.75rem 0;
}
.bn-global-search form {
	display: flex;
	gap: 0.5rem;
	align-items: center;
	max-width: var(--bn-container);
	margin-inline: auto;
	padding-inline: 1rem;
}
.bn-global-search input[type="search"] {
	flex: 1;
	min-height: var(--bn-tap);
	padding: 0 1rem;
	font-family: var(--bn-font-ui);
	font-size: var(--bn-fs-body);
	border: 2px solid var(--bn-color-accent);
	border-radius: var(--bn-radius);
	background: #fff;
	color: var(--bn-color-text);
}
.bn-global-search button {
	min-height: var(--bn-tap);
	min-width: var(--bn-tap);
	padding: 0 1.25rem;
	background: var(--bn-color-accent);
	color: #fff;
	border: none;
	border-radius: var(--bn-radius);
	font-weight: 700;
	cursor: pointer;
	font-family: var(--bn-font-ui);
}
.bn-global-search button:hover { background: var(--bn-color-accent-hover); }

/* 搜索联想下拉（JS 增强，见 inc/search-suggest.js） */
.bn-suggest-list {
	position: absolute;
	inset-inline-start: 1rem;
	inset-inline-end: 1rem;
	top: 100%;
	background: #fff;
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	box-shadow: 0 8px 24px rgba(0,0,0,0.12);
	z-index: 50;
	max-height: 320px;
	overflow-y: auto;
}
.bn-suggest-item {
	padding: 0.6rem 1rem;
	border-bottom: 1px solid var(--bn-color-surface);
	cursor: pointer;
	color: var(--bn-color-text);
}
.bn-suggest-item:hover { background: var(--bn-color-surface); }
.bn-suggest-item .bn-suggest-sku { color: var(--bn-color-primary); }

/* ==========================================================================
   5. 产品详情页布局（RTL：右→左 = 图 → 描述 → CTA）
   ========================================================================== */
.bn-product-layout {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--bn-gap);
	margin-top: 1.5rem;
}
@media (min-width: 992px) {
	.bn-product-layout {
		/* RTL 下：第一列在最右。顺序：图(右) | 描述(中) | CTA(左) */
		grid-template-columns: 320px 1fr 300px;
	}
}

/* 5a. 右侧：产品图 + 认证标识 */
.bn-product-media img {
	background: #fff;
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	width: 100%;
}
.bn-cert-badges {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin-top: 0.75rem;
}
.bn-cert-badge {
	font-size: 13px;
	font-weight: 700;
	color: var(--bn-color-success);
	border: 1px solid var(--bn-color-success);
	border-radius: 4px;
	padding: 0.2rem 0.5rem;
	background: rgba(30,132,73,0.06);
}

/* 5a-1. 产品相册：主图 + 缩略图条 */
.bn-gallery-main {
	margin-bottom: 0.75rem;
}
.bn-gallery-main img {
	background: #fff;
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	width: 100%;
	display: block;
}
.bn-gallery-thumbs {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}
.bn-gallery-thumb {
	padding: 0;
	border: 2px solid transparent;
	border-radius: var(--bn-radius);
	background: #fff;
	cursor: pointer;
	line-height: 0;
	overflow: hidden;
	transition: border-color 0.15s ease;
}
.bn-gallery-thumb img {
	width: 72px;
	height: 72px;
	object-fit: cover;
	display: block;
}
.bn-gallery-thumb:hover {
	border-color: var(--bn-color-border);
}
.bn-gallery-thumb.is-active {
	border-color: var(--bn-color-primary);
}

/* 5b. 中间：阿拉伯语描述 + 技术规格表 */
.bn-product-desc { font-size: var(--bn-fs-body); }

.bn-tech-specs {
	width: 100%;
	border-collapse: collapse;
	margin-top: 1rem;
	font-size: var(--bn-fs-body-sm);
	background: #fff;
}
.bn-tech-specs caption {
	text-align: start;            /* RTL 下视为右对齐 */
	font-weight: 700;
	color: var(--bn-color-primary);
	padding: 0.5rem 0;
	font-size: var(--bn-fs-h3);
}
.bn-tech-specs th,
.bn-tech-specs td {
	border: 1px solid var(--bn-color-border);
	padding: 0.7rem 0.9rem;
	text-align: start;            /* RTL 表头默认右对齐，符合阿拉伯阅读 */
	vertical-align: top;
}
.bn-tech-specs th {
	background: var(--bn-color-surface);
	width: 38%;
	white-space: nowrap;
}
/* 数值单位保持 LTR（数值本身被 .ltr-part 强制 ltr，此处保证单元格方向稳定） */
.bn-tech-specs td .bn-unit {
	direction: ltr;
	unicode-bidi: embed;
	display: inline-block;
}

/* 5c. 左侧：悬浮 CTA + WhatsApp + PDF */
.bn-product-cta {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	position: sticky;
	top: 1rem;
}
.bn-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	min-height: var(--bn-tap);    /* 触控 ≥48px */
	padding: 0 1rem;
	border-radius: var(--bn-radius);
	font-weight: 700;
	font-family: var(--bn-font-ui);
	font-size: var(--bn-fs-body);
	cursor: pointer;
	border: 2px solid transparent;
	text-decoration: none;
}
.bn-btn:hover { text-decoration: none; }
.bn-btn--quote { background: var(--bn-color-accent); color: #fff; }
.bn-btn--quote:hover { background: var(--bn-color-accent-hover); color: #fff; }
.bn-btn--whatsapp { background: #25d366; color: #fff; }
.bn-btn--whatsapp:hover { background: #1ebe5d; color: #fff; }
.bn-btn--pdf { background: #fff; color: var(--bn-color-primary); border-color: var(--bn-color-primary); }
.bn-btn--pdf:hover { background: var(--bn-color-surface); }

/* 移动端：CTA 底部固定栏 */
.bn-mobile-cta {
	position: fixed;
	inset-inline: 0;
	bottom: 0;
	display: flex;
	gap: 0.5rem;
	padding: 0.5rem;
	background: #fff;
	border-top: 1px solid var(--bn-color-border);
	box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
	z-index: 60;
}
.bn-mobile-cta .bn-btn { flex: 1; font-size: 15px; }
@media (min-width: 992px) { .bn-mobile-cta { display: none; } }

/* ==========================================================================
   6. 交叉引用：Compatible With / Replaces
   ========================================================================== */
.bn-crossref {
	margin-top: 2rem;
}
.bn-crossref h3 { border-bottom: 2px solid var(--bn-color-surface); padding-bottom: 0.4rem; }
.bn-crossref-list {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	list-style: none;
	padding: 0;
	margin: 0.75rem 0 0;
}
.bn-crossref-list li a {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	border: 1px solid var(--bn-color-border);
	border-radius: 4px;
	padding: 0.4rem 0.7rem;
	font-size: var(--bn-fs-body-sm);
}
.bn-crossref-list li a:hover { border-color: var(--bn-color-accent); text-decoration: none; }

/* ==========================================================================
   7. 产品列表页 / 归档页 + 筛选器（RTL）
   ========================================================================== */
.bn-archive-layout {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--bn-gap);
	margin-top: 1.5rem;
}
@media (min-width: 992px) {
	.bn-archive-layout { grid-template-columns: 260px 1fr; }
}

.bn-filters {
	background: var(--bn-color-surface);
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	padding: 1rem;
}
.bn-filters h3 { font-size: var(--bn-fs-h3); margin-top: 0; }
.bn-filters ul { list-style: none; padding: 0; margin: 0 0 1rem; }
.bn-filters li { margin-bottom: 0.35rem; }
.bn-filters a { font-size: var(--bn-fs-body-sm); }
.bn-filter-group-title {
	font-weight: 700;
	color: var(--bn-color-primary-dark);
	margin: 0.8rem 0 0.4rem;
}

.bn-product-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 1rem;
}
.bn-product-card {
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	background: #fff;
	overflow: hidden;
	display: flex;
	flex-direction: column;
	transition: none;             /* 禁用动画：工业高效 */
}
.bn-product-card:hover { border-color: var(--bn-color-accent); }
.bn-product-card .bn-card-media { background: var(--bn-color-surface); aspect-ratio: 1 / 1; }
.bn-product-card .bn-card-body { padding: 0.9rem; flex: 1; display: flex; flex-direction: column; }
.bn-product-card h3 { font-size: var(--bn-fs-body); margin: 0 0 0.4rem; }
.bn-product-card .bn-card-sku { margin-top: auto; }

/* ==========================================================================
   8. 面包屑
   ========================================================================== */
.bn-breadcrumb {
	font-size: var(--bn-fs-body-sm);
	color: var(--bn-color-text-muted);
	padding: 0.75rem 0;
}
.bn-breadcrumb a { color: var(--bn-color-text-muted); }
.bn-breadcrumb .sep { margin: 0 0.4rem; opacity: 0.6; }

/* ==========================================================================
   9. 搜索结果页（高亮匹配 SKU / 型号）
   ========================================================================== */
.bn-search-result {
	border-bottom: 1px solid var(--bn-color-surface);
	padding: 1rem 0;
}
.bn-search-result .bn-result-sku { margin-top: 0.4rem; }
.bn-search-hit {
	background: #fff3cd;           /* 高亮命中关键词 */
	font-weight: 700;
	padding: 0 0.15em;
	border-radius: 3px;
}

/* ==========================================================================
   10. 信任元素区（授权徽章 / ISO / 本地服务点）
   ========================================================================== */
.bn-trust-bar {
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
	align-items: center;
	background: var(--bn-color-surface);
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	padding: 1rem 1.25rem;
	margin: 1.5rem 0;
}
.bn-trust-bar .bn-trust-item { display: flex; align-items: center; gap: 0.5rem; font-size: var(--bn-fs-body-sm); }
.bn-trust-bar .bn-trust-item strong { color: var(--bn-color-primary); }

/* ==========================================================================
   11. 无障碍 / 焦点可见
   ========================================================================== */
a:focus,
button:focus,
input:focus,
.bn-btn:focus {
	outline: 3px solid var(--bn-color-accent);
	outline-offset: 2px;
}

/* ==========================================================================
   12. 图片懒加载占位（性能优化）
   ========================================================================== */
img.bn-lazy {
	background: var(--bn-color-surface);
	min-height: 120px;
}

/* ==========================================================================
   13. 响应式断点微调
   ========================================================================== */
@media (max-width: 600px) {
	:root { --bn-fs-h1: 24px; --bn-fs-h2: 20px; --bn-fs-h3: 18px; }
	.bn-global-search form { flex-wrap: wrap; }
	.bn-global-search input[type="search"] { width: 100%; }
}

/* 尊重用户的减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
	* { animation: none !important; transition: none !important; }
}

/* ===== 新闻/文章单页 (single.php) ===== */
.bn-article { max-width: 820px; margin-inline: auto; padding-block: 2rem; }
.bn-article-header { margin-bottom: 1.25rem; border-bottom: 1px solid #eee; padding-bottom: 1rem; }
.bn-article-title { font-size: 1.9rem; line-height: 1.4; margin: 0 0 .5rem; }
.bn-article-meta { color: #777; font-size: .9rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.bn-article-thumb { margin: 1.5rem 0; }
.bn-article-thumb img { max-width: 100%; height: auto; border-radius: 8px; }
.bn-article-content { font-size: 1.05rem; line-height: 1.9; }
.bn-article-content h2 { font-size: 1.4rem; margin: 2rem 0 1rem; }
.bn-article-content p { margin: 0 0 1.1rem; }
.bn-article-content img { max-width: 100%; height: auto; }

/* ===== 新闻配图（脚本注入） ===== */
.kbap-news-figure { margin: 1.75rem 0; text-align: center; }
.kbap-news-figure .kbap-news-img { max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,.08); }

/* ==========================================================================
   14. 首页（index.php）RTL 视觉组件
   ========================================================================== */
.bn-hero {
	background: linear-gradient(135deg, var(--bn-color-primary), var(--bn-color-primary-dark));
	color: #fff;
	padding: 3rem 0 2.5rem;
}
.bn-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 42px); margin: 0 0 0.75rem; }
.bn-hero-sub { color: #e3ecf3; max-width: 760px; font-size: var(--bn-fs-body); margin: 0 0 1.5rem; }
.bn-hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.bn-hero .bn-btn--pdf { background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.5); }
.bn-hero .bn-btn--pdf:hover { background: rgba(255,255,255,0.22); }

.bn-home-intro { margin: 2rem 0; }
.bn-home-intro h2 { font-size: var(--bn-fs-h2); }
.bn-home-intro p { font-size: var(--bn-fs-body); line-height: 1.9; max-width: 920px; }
.bn-home-intro a { color: var(--bn-color-accent); font-weight: 700; }
.bn-home-intro a:hover { text-decoration: underline; }

.bn-home-section { margin: 2.5rem 0; }
.bn-section-head {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 1rem;
	flex-wrap: wrap;
	border-bottom: 2px solid var(--bn-color-surface);
	padding-bottom: 0.5rem;
	margin-bottom: 1.25rem;
}
.bn-section-head h2 { margin: 0; font-size: var(--bn-fs-h2); }
.bn-link-more {
	color: var(--bn-color-accent);
	font-weight: 700;
	white-space: nowrap;
}
.bn-link-more:hover { color: var(--bn-color-accent-hover); text-decoration: underline; }
.bn-home-cta-line { margin-top: 1rem; font-size: var(--bn-fs-body-sm); color: var(--bn-color-text-muted); }
.bn-home-cta-line a { font-weight: 700; }

/* Pillars（系列/类别/应用 快捷导航） */
.bn-home-pillars { margin: 2.5rem 0; background: var(--bn-color-surface); border: 1px solid var(--bn-color-border); border-radius: var(--bn-radius); padding: 1.25rem 1.5rem; }
.bn-home-pillars h2 { font-size: var(--bn-fs-h2); margin-top: 0; }
.bn-pillars-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.bn-pillar-col h3 { font-size: var(--bn-fs-h3); margin: 0 0 0.6rem; }
.bn-pillar-col ul { list-style: none; padding: 0; margin: 0; }
.bn-pillar-col li { margin-bottom: 0.4rem; }
.bn-pillar-col a { font-size: var(--bn-fs-body-sm); color: var(--bn-color-primary); }
.bn-pillar-col a:hover { color: var(--bn-color-accent); }

/* 首页 CTA 引导区 */
.bn-home-cta-band {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	flex-wrap: wrap;
	background: var(--bn-color-primary-dark);
	color: #fff;
	border-radius: var(--bn-radius);
	padding: 1.5rem 2rem;
	margin: 3rem 0 1rem;
}
.bn-home-cta-band h2 { color: #fff; margin: 0 0 0.4rem; font-size: var(--bn-fs-h2); }
.bn-home-cta-band p { color: #cdd9e3; margin: 0; }

/* ==========================================================================
   15. 新闻卡片（首页 + 新闻列表）
   ========================================================================== */
.bn-news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem; }
.bn-news-card {
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	background: #fff;
	overflow: hidden;
	display: flex;
	flex-direction: column;
}
.bn-news-card-media { background: var(--bn-color-surface); aspect-ratio: 16 / 9; overflow: hidden; }
.bn-news-card-media img { width: 100%; height: 100%; object-fit: cover; }
.bn-news-card-body { padding: 1rem 1.1rem 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; flex: 1; }
.bn-news-card-body h3 { font-size: var(--bn-fs-body); margin: 0; }
.bn-news-card-body h3 a { color: var(--bn-color-primary); }
.bn-news-card-meta { color: var(--bn-color-text-muted); font-size: 13px; }
.bn-news-card-excerpt { color: var(--bn-color-text-muted); font-size: var(--bn-fs-body-sm); margin: 0; }

/* 列表样式（新闻页主栏） */
.bn-news-grid--list { grid-template-columns: 1fr; }
.bn-news-card--row {
	flex-direction: row;
	align-items: stretch;
}
.bn-news-card--row .bn-news-card-media { flex: 0 0 220px; aspect-ratio: auto; }
.bn-news-card--row .bn-news-card-body { flex: 1; }
@media (max-width: 600px) {
	.bn-news-card--row { flex-direction: column; }
	.bn-news-card--row .bn-news-card-media { flex: auto; aspect-ratio: 16 / 9; }
}

/* ==========================================================================
   16. 新闻列表页布局（主栏 + 侧栏）
   ========================================================================== */
.bn-news-header { margin: 1.5rem 0 1rem; }
.bn-news-header h1 { margin: 0 0 0.5rem; font-size: var(--bn-fs-h1); }
.bn-news-header p { color: var(--bn-color-text-muted); max-width: 760px; }
.bn-news-layout { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 2rem; }
@media (min-width: 992px) {
	.bn-news-layout { grid-template-columns: 1fr 300px; }
}
.bn-news-side { display: flex; flex-direction: column; gap: 1.5rem; }
.bn-side-block {
	background: var(--bn-color-surface);
	border: 1px solid var(--bn-color-border);
	border-radius: var(--bn-radius);
	padding: 1rem 1.1rem;
}
.bn-side-block h3 { font-size: var(--bn-fs-h3); margin-top: 0; }
.bn-side-news { list-style: none; padding: 0; margin: 0; }
.bn-side-news li { padding: 0.5rem 0; border-bottom: 1px solid var(--bn-color-border); }
.bn-side-news li:last-child { border-bottom: none; }
.bn-side-news a { color: var(--bn-color-primary); font-size: var(--bn-fs-body-sm); font-weight: 500; }
.bn-side-news-date { display: block; color: var(--bn-color-text-muted); font-size: 12px; margin-top: 0.2rem; }
.bn-side-products { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; }
.bn-side-product {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
	border: 1px solid var(--bn-color-border);
	border-radius: 4px;
	padding: 0.5rem;
	background: #fff;
	text-align: start;
}
.bn-side-product:hover { border-color: var(--bn-color-accent); text-decoration: none; }
.bn-side-product img { width: 100%; height: 64px; object-fit: contain; background: var(--bn-color-surface); border-radius: 4px; }
.bn-side-product-title { font-size: 13px; color: var(--bn-color-text); line-height: 1.3; }
.bn-side-product-sku { font-size: 12px; }
.bn-side-cta { margin: 0.75rem 0 0; text-align: start; }

/* 新闻页上下文 chips */
.bn-news-context, .bn-product-context {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.5rem;
	margin: 1.5rem 0;
	padding-top: 1rem;
	border-top: 1px solid var(--bn-color-surface);
}
.bn-news-context-label { color: var(--bn-color-text-muted); font-size: var(--bn-fs-body-sm); margin-inline-end: 0.25rem; }
.bn-chip {
	display: inline-flex;
	align-items: center;
	border: 1px solid var(--bn-color-border);
	border-radius: 999px;
	padding: 0.35rem 0.85rem;
	font-size: var(--bn-fs-body-sm);
	color: var(--bn-color-primary);
	background: #fff;
}
.bn-chip:hover { border-color: var(--bn-color-accent); color: var(--bn-color-accent); text-decoration: none; }

/* ==========================================================================
   17. 相关区块（新闻单页 / 产品详情页）
   ========================================================================== */
.bn-related { margin: 2.5rem 0 0; }
.bn-related h2 { font-size: var(--bn-fs-h2); border-bottom: 2px solid var(--bn-color-surface); padding-bottom: 0.5rem; }
.bn-related-list { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0.75rem; }
.bn-related-list li { border: 1px solid var(--bn-color-border); border-radius: var(--bn-radius); padding: 0.75rem 1rem; background: #fff; }
.bn-related-list a { color: var(--bn-color-primary); font-weight: 500; }
.bn-related-date { display: block; color: var(--bn-color-text-muted); font-size: 12px; margin-top: 0.3rem; }
.bn-related-more { margin-top: 1rem; }
.bn-related-products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }

/* ==========================================================================
   18. 全站联系信息（顶栏 + 页脚）
   ========================================================================== */
.bn-topbar { background: var(--bn-color-primary); color: #fff; font-size: 13px; }
.bn-topbar-inner { display: flex; flex-wrap: wrap; gap: 1.25rem; align-items: center; padding-block: 0.4rem; }
.bn-topbar-item { color: #eaf1f7; text-decoration: none; }
.bn-topbar-item:hover { color: #fff; text-decoration: underline; }
.bn-topbar-item span[dir="ltr"] { direction: ltr; unicode-bidi: embed; display: inline-block; }

.bn-footer-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem; padding-block: 2rem; }
.bn-footer-col h4 { color: #fff; margin: 0 0 0.85rem; font-size: 16px; }
.bn-footer-contact p { margin: 0.35rem 0; color: #cdd9e3; line-height: 1.5; }
.bn-footer-label { color: #fff; font-weight: 600; margin-inline-end: 0.35rem; }
.bn-footer-contact a { color: #9ec5e8; text-decoration: none; }
.bn-footer-contact a:hover { color: #fff; text-decoration: underline; }
.bn-footer-wa { display: inline-block; margin-top: 0.4rem; background: #25d366; color: #fff; padding: 0.3rem 0.8rem; border-radius: 999px; font-weight: 600; }
.bn-footer-wa:hover { color: #fff; filter: brightness(1.05); }
.bn-footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-block: 1rem; color: #9fb0bf; font-size: 13px; }
@media (max-width: 768px) { .bn-footer-grid { grid-template-columns: 1fr; gap: 1.25rem; } }

/* ==========================================================================
   19. 在线留言表单（产品详情页）
   ========================================================================== */
.bn-inquiry { background: var(--bn-color-surface); border: 1px solid var(--bn-color-border); border-radius: var(--bn-radius); padding: 1.5rem; }
.bn-inquiry-intro { color: var(--bn-color-text-muted); margin: 0.25rem 0 1rem; }
.bn-inquiry-form { display: grid; gap: 0.9rem; }
.bn-inquiry-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.bn-inquiry-form label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 14px; font-weight: 600; color: var(--bn-color-text); }
.bn-inquiry-form input,
.bn-inquiry-form textarea {
	border: 1px solid var(--bn-color-border); border-radius: var(--bn-radius);
	padding: 0.65rem 0.8rem; font: inherit; background: #fff; color: var(--bn-color-text);
	width: 100%; box-sizing: border-box;
}
.bn-inquiry-form input:focus,
.bn-inquiry-form textarea:focus { outline: none; border-color: var(--bn-color-primary); box-shadow: 0 0 0 3px rgba(18,52,86,.12); }
.bn-inquiry-form input[readonly] { background: #f4f6f8; color: var(--bn-color-text-muted); }
.bn-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bn-inquiry-form .bn-btn--quote { justify-self: start; margin-top: 0.25rem; }
.bn-inquiry-alert { padding: 0.75rem 1rem; border-radius: var(--bn-radius); margin-bottom: 1rem; font-weight: 600; }
.bn-inquiry-alert--ok { background: #e6f6ec; color: #1c7a3e; border: 1px solid #b6e3c6; }
.bn-inquiry-alert--err { background: #fdecec; color: #b42323; border: 1px solid #f3c2c2; }
@media (max-width: 600px) { .bn-inquiry-row { grid-template-columns: 1fr; } }

/* ==========================================================================
   20. 新闻列表页增强（hero / 分类筛选）
   ========================================================================== */
.bn-news-header--hero { background: linear-gradient(135deg, var(--bn-color-primary), #0d2a47); color: #fff; border-radius: var(--bn-radius); padding: 2rem; margin-bottom: 1.25rem; }
.bn-news-header--hero h1 { color: #fff; margin: 0 0 0.5rem; }
.bn-news-header--hero p { color: #d6e2ec; margin: 0; max-width: 720px; }
.bn-news-filter { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.bn-news-filter .bn-chip.is-active { background: var(--bn-color-primary); color: #fff; border-color: var(--bn-color-primary); }

/* ==========================================================================
   21. 通用页面模板（page.php）
   ========================================================================== */
.bn-page-hero {
	background: linear-gradient(135deg, var(--bn-color-primary), var(--bn-color-primary-dark));
	color: #fff;
	padding: 2rem 0 1.75rem;
}
.bn-page-hero .bn-breadcrumb { margin-bottom: 0.75rem; }
.bn-page-hero .bn-breadcrumb,
.bn-page-hero .bn-breadcrumb a { color: rgba(255,255,255,0.7); }
.bn-page-hero .bn-breadcrumb a:hover { color: #fff; }
.bn-page-hero .bn-breadcrumb-sep { margin: 0 0.5rem; opacity: 0.5; }
.bn-page-hero h1 {
	color: #fff;
	font-size: clamp(24px, 3.5vw, 36px);
	margin: 0;
	line-height: 1.35;
}

.bn-page { max-width: 820px; margin-inline: auto; padding-block: 2rem; }
.bn-page-thumb { margin-bottom: 1.5rem; }
.bn-page-thumb img { border-radius: 8px; width: 100%; height: auto; }
.bn-page-content { font-size: 1.05rem; line-height: 1.9; }
.bn-page-content h2 { font-size: 1.4rem; margin: 2rem 0 1rem; color: var(--bn-color-primary); }
.bn-page-content h3 { font-size: 1.2rem; margin: 1.5rem 0 0.75rem; }
.bn-page-content p { margin: 0 0 1.1rem; }
.bn-page-content img { max-width: 100%; height: auto; border-radius: 6px; }
.bn-page-content ul,
.bn-page-content ol { padding-inline-start: 1.5rem; margin-bottom: 1.1rem; }
.bn-page-content li { margin-bottom: 0.4rem; }

