/*
Theme Name: Lang Yeon Advisory
Theme URI: https://example.com/lang-yeon-advisory
Author: Custom Build
Author URI: https://example.com
Description: 面向国际企业的中国商业顾问主题。视觉体系依据 Lang Yeon Consulting 品牌手册（Caladea 衬线标题 + Carlito 正文，深蓝 #10294b / 品牌青 #2aa3dc，扁平编辑式排版）；内置 Topic Cluster 内容架构、Case Study 内容类型、FAQ/Article/Organization/Person/Breadcrumb Schema、AI Search 直答模块与完整中文自定义器。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.8
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: china-advisory
Tags: business, consulting, corporate, custom-colors, custom-logo, custom-menu, featured-images, translation-ready, block-styles, wide-blocks
*/

/* ==========================================================================
   1. 设计令牌 / Design tokens
   ========================================================================== */

:root {
	/* 颜色由 Customizer 输出覆盖，此处为兜底默认值 */
	--ca-navy: #10294b;
	--ca-blue: #2aa3dc;          /* 品牌青：仅用于短线、边框、图标、大号数字 */
	--ca-blue-deep: #1476a3;     /* 小字与白字实心按钮用（品牌青白底仅 2.85:1，不达 WCAG AA） */
	--ca-blue-light: #2aa3dc;
	--ca-link: #1b5490;
	--ca-accent: #2aa3dc;
	--ca-danger: #c0392b;

	--ca-heading: var(--ca-navy);
	--ca-text: #414b57;
	--ca-muted: #6b7684;
	--ca-inverse: #ffffff;

	--ca-bg: #ffffff;
	--ca-surface: #f2f6fa;
	--ca-surface-alt: #e9eff6;
	--ca-dark: #10294b;
	--ca-border: #e5eaf0;

	--ca-font-heading: "Caladea", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Cambria, Georgia, serif;
	--ca-font-body: "Carlito", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Calibri, system-ui, sans-serif;

	--ca-fs-base: 17px;
	--ca-lh: 1.65;
	--ca-radius: 0px;
	--ca-radius-lg: calc(var(--ca-radius) * 2);
	--ca-shadow: 0 10px 28px rgba(16, 41, 75, .07);
	--ca-shadow-sm: 0 4px 12px rgba(16, 41, 75, .05);

	--ca-rule: 2px;              /* 编号上方的强调短线 */
	--ca-rule-w: 108px;

	--ca-container: 1220px;
	--ca-gutter: 24px;
	--ca-section-y: 104px;

	--ca-header-h: 84px;
}

/* ==========================================================================
   2. 基础重置 / Base
   ========================================================================== */

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
	margin: 0;
	background: var(--ca-bg);
	color: var(--ca-text);
	font-family: var(--ca-font-body);
	font-size: var(--ca-fs-base);
	line-height: var(--ca-lh);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

body.ca-menu-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
	margin: 0 0 .6em;
	color: var(--ca-heading);
	font-family: var(--ca-font-heading);
	font-weight: 400;
	line-height: 1.22;
	letter-spacing: 0;
}

h1 { font-size: clamp(2.1rem, 1.3rem + 2.6vw, 3.05rem); line-height: 1.16; }
h2 { font-size: clamp(1.65rem, 1.1rem + 1.9vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 1.02rem + .7vw, 1.45rem); }
h4 { font-size: 1.12rem; }
h5 { font-size: 1.02rem; }

/* 小标签：无衬线、全大写、字距拉开 —— 品牌手册里的 UNDERSTAND / COMMERCIAL 样式 */
h6 {
	font-family: var(--ca-font-body);
	font-size: .82rem;
	font-weight: 700;
	letter-spacing: .13em;
	text-transform: uppercase;
}

/* 正文里的小标题回到无衬线，保证长文可读性 */
.ca-entry h3,
.ca-entry h4 {
	font-family: var(--ca-font-body);
	font-weight: 700;
	letter-spacing: 0;
}

/* 大标题全大写（品牌手册风格），可在自定义器关闭 */
.ca-caps-headings .ca-hero__title,
.ca-caps-headings .ca-section-head h2,
.ca-caps-headings .ca-page-head h1,
.ca-caps-headings .ca-article-head h1,
.ca-caps-headings .ca-cta h2 {
	text-transform: uppercase;
	letter-spacing: .005em;
}

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

a {
	color: var(--ca-link);
	text-decoration: none;
	transition: color .2s ease, opacity .2s ease;
}
a:hover, a:focus { color: var(--ca-navy); }

img, svg, video, iframe { max-width: 100%; height: auto; vertical-align: middle; }
img { display: block; }

ul, ol { margin: 0 0 1.15em; padding-left: 1.25em; }
li { margin-bottom: .4em; }

blockquote {
	margin: 1.8em 0;
	padding: 1.5em 1.8em;
	background: var(--ca-surface);
	border-left: 3px solid var(--ca-blue);
	border-radius: 0;
	color: var(--ca-navy);
	font-size: 1.06em;
	font-style: normal;
}
blockquote cite { display: block; margin-top: .9em; color: var(--ca-muted); font-size: .9rem; font-style: normal; }

code, pre, kbd {
	font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
	font-size: .92em;
}
code { padding: .15em .45em; background: var(--ca-surface-alt); border-radius: 4px; }
pre { padding: 1.2em; overflow-x: auto; background: var(--ca-dark); color: #e6ecf7; border-radius: var(--ca-radius); }
pre code { background: none; padding: 0; color: inherit; }

hr { height: 1px; margin: 2.4em 0; background: var(--ca-border); border: 0; }

table { width: 100%; border-collapse: collapse; margin-bottom: 1.6em; font-size: .95rem; }
th, td { padding: .85em 1em; border: 1px solid var(--ca-border); text-align: left; }
th { background: var(--ca-surface); color: var(--ca-navy); font-family: var(--ca-font-body); font-weight: 700; font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; }

figure { margin: 1.8em 0; }
figcaption { margin-top: .7em; color: var(--ca-muted); font-size: .88rem; text-align: center; }

::selection { background: var(--ca-blue); color: #fff; }

:focus-visible {
	outline: 3px solid var(--ca-blue-light);
	outline-offset: 2px;
	border-radius: 3px;
}

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	margin: -1px; padding: 0;
	overflow: hidden;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}
.skip-link:focus {
	position: fixed !important;
	top: 12px; left: 12px;
	z-index: 100000;
	width: auto; height: auto;
	padding: .8em 1.4em;
	clip: auto; clip-path: none;
	background: var(--ca-navy);
	color: #fff;
	border-radius: var(--ca-radius);
	font-weight: 600;
}

/* ==========================================================================
   3. 布局 / Layout
   ========================================================================== */

.ca-container {
	width: 100%;
	max-width: var(--ca-container);
	margin-inline: auto;
	padding-inline: var(--ca-gutter);
}
.ca-container--narrow { max-width: 820px; }
.ca-container--wide { max-width: 1340px; }

.ca-section { position: relative; padding-block: var(--ca-section-y); }
.ca-section--compact { padding-block: calc(var(--ca-section-y) * .62); }
.ca-section--roomy { padding-block: calc(var(--ca-section-y) * 1.28); }
.ca-section--flush-top { padding-top: 0; }
.ca-section--flush-bottom { padding-bottom: 0; }

.ca-section--surface { background: var(--ca-surface); }
.ca-section--alt { background: var(--ca-surface-alt); }
.ca-section--dark { background: var(--ca-dark); }
.ca-section--dark,
.ca-section--dark p,
.ca-section--dark li { color: rgba(255, 255, 255, .8); }
.ca-section--dark h1,
.ca-section--dark h2,
.ca-section--dark h3,
.ca-section--dark h4 { color: #fff; }
.ca-section--dark .ca-eyebrow { color: var(--ca-blue-light); }

.ca-section__bg {
	position: absolute;
	inset: 0;
	background-size: cover;
	background-position: center;
	z-index: 0;
}
.ca-section__overlay { position: absolute; inset: 0; z-index: 1; }
.ca-section > .ca-container { position: relative; z-index: 2; }

.ca-grid { display: grid; gap: 28px; }
.ca-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ca-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ca-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.ca-split {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
	gap: 60px;
	align-items: center;
}
.ca-split--wide-left { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }

/* ==========================================================================
   4. 排版组件 / Typographic components
   ========================================================================== */

.ca-eyebrow {
	display: block;
	margin-bottom: 14px;
	color: var(--ca-blue-deep);
	font-family: var(--ca-font-body);
	font-size: .8rem;
	font-weight: 700;
	letter-spacing: .18em;
	text-transform: uppercase;
}

.ca-section-head { max-width: 900px; margin-bottom: 56px; }
.ca-section-head--center { margin-inline: auto; text-align: center; }
.ca-section-head p { color: var(--ca-text); font-size: 1.04rem; max-width: 76ch; }
.ca-section-head--center p { margin-inline: auto; }
.ca-section-head h2 { margin-bottom: .5em; }

/* 副标题：衬线、句首大写、中蓝 —— 手册里的 "Execution matters." */
.ca-section-sub {
	margin: -.25em 0 1em;
	color: var(--ca-link);
	font-family: var(--ca-font-heading);
	font-size: clamp(1.15rem, 1rem + .6vw, 1.5rem);
	line-height: 1.35;
}

/* 标题下方的短青线 */
.ca-section-head--rule h2::after,
.ca-rule-under::after {
	content: "";
	display: block;
	width: var(--ca-rule-w);
	height: var(--ca-rule);
	margin-top: .7em;
	background: var(--ca-blue);
}
.ca-section-head--center.ca-section-head--rule h2::after { margin-inline: auto; }

/* 细分隔线 */
.ca-hairline { height: 1px; background: var(--ca-border); border: 0; margin: 0; }

.ca-lead {
	font-size: 1.14rem;
	line-height: 1.75;
	color: var(--ca-text);
}

.ca-kicker {
	color: var(--ca-navy);
	font-family: var(--ca-font-heading);
	font-weight: 600;
	font-size: 1.1rem;
}

/* 直答模块 —— AI Search / Google AI Overview 优化 */
.ca-answer {
	position: relative;
	margin: 0 0 36px;
	padding: 28px 32px;
	background: var(--ca-surface);
	border-left: 0;
	border-top: var(--ca-rule) solid var(--ca-blue);
	border-radius: 0;
}
.ca-answer__label {
	display: block;
	margin-bottom: 8px;
	color: var(--ca-blue-deep);
	font-family: var(--ca-font-body);
	font-size: .72rem;
	font-weight: 700;
	letter-spacing: .18em;
	text-transform: uppercase;
}
.ca-answer p { margin: 0; color: var(--ca-navy); font-family: var(--ca-font-heading); font-size: 1.15rem; line-height: 1.55; }

/* 勾选清单 */
.ca-checklist { margin: 0 0 1.4em; padding: 0; list-style: none; }
.ca-checklist li {
	position: relative;
	margin-bottom: .72em;
	padding-left: 34px;
	line-height: 1.6;
}
.ca-checklist li::before {
	content: "";
	position: absolute;
	left: 0; top: .34em;
	width: 20px; height: 20px;
	background: var(--ca-blue);
	border-radius: 50%;
	-webkit-mask: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm-1 14.5l-4-4L8.4 11l2.6 2.6L15.6 9 17 10.4l-6 6.1z'/%3E%3C/svg%3E") center/contain no-repeat;
	mask: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm-1 14.5l-4-4L8.4 11l2.6 2.6L15.6 9 17 10.4l-6 6.1z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.ca-section--dark .ca-checklist li::before { background: var(--ca-blue-light); }

/* 箭头清单（服务要点） */
.ca-arrowlist { margin: 0 0 1.4em; padding: 0; list-style: none; }
.ca-arrowlist li {
	position: relative;
	margin-bottom: .55em;
	padding-left: 24px;
	color: var(--ca-text);
	line-height: 1.6;
}
.ca-arrowlist li::before {
	content: "";
	position: absolute;
	left: 2px; top: .62em;
	width: 8px; height: 8px;
	border-right: 2px solid var(--ca-blue);
	border-bottom: 2px solid var(--ca-blue);
	transform: rotate(-45deg);
}

/* ==========================================================================
   5. 按钮 / Buttons
   ========================================================================== */

.ca-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 10px;
	padding: 15px 34px;
	border: 1px solid transparent;
	border-radius: var(--ca-radius);
	background: var(--ca-navy);
	color: #fff;
	font-family: var(--ca-font-body);
	font-size: .92rem;
	font-weight: 700;
	letter-spacing: .09em;
	text-transform: uppercase;
	line-height: 1.3;
	text-align: center;
	cursor: pointer;
	transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.ca-btn:hover,
.ca-btn:focus {
	background: var(--ca-blue-deep);
	border-color: var(--ca-blue-deep);
	color: #fff;
}

.ca-btn--primary { background: var(--ca-blue-deep); border-color: var(--ca-blue-deep); }
.ca-btn--primary:hover, .ca-btn--primary:focus { background: var(--ca-navy); border-color: var(--ca-navy); }

.ca-btn--light { background: var(--ca-blue-deep); border-color: var(--ca-blue-deep); }
.ca-btn--light:hover, .ca-btn--light:focus { background: var(--ca-navy); border-color: var(--ca-navy); }

.ca-btn--outline {
	background: transparent;
	border-color: var(--ca-navy);
	color: var(--ca-navy);
}
.ca-btn--outline:hover, .ca-btn--outline:focus { background: var(--ca-navy); border-color: var(--ca-navy); color: #fff; }

.ca-btn--ghost {
	background: transparent;
	border-color: rgba(255, 255, 255, .55);
	color: #fff;
}
.ca-btn--ghost:hover, .ca-btn--ghost:focus { background: #fff; border-color: #fff; color: var(--ca-navy); }

.ca-btn--text {
	padding: 0;
	background: none;
	border: 0;
	color: var(--ca-blue);
}
.ca-btn--text:hover, .ca-btn--text:focus { background: none; color: var(--ca-navy); }

.ca-btn--sm { padding: 11px 22px; font-size: .93rem; }
.ca-btn--lg { padding: 18px 42px; font-size: 1.06rem; }
.ca-btn--block { display: flex; width: 100%; }

.ca-btn-group { display: flex; flex-wrap: wrap; gap: 16px; }
.ca-btn-group--center { justify-content: center; }

/* 文字链接箭头 */
.ca-more {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	color: var(--ca-link);
	font-family: var(--ca-font-body);
	font-weight: 700;
	font-size: .8rem;
	letter-spacing: .12em;
	text-transform: uppercase;
}
.ca-more::after {
	content: "→";
	transition: transform .2s ease;
}
.ca-more:hover::after, .ca-more:focus::after { transform: translateX(4px); }

/* ==========================================================================
   6. 表单 / Forms
   ========================================================================== */

input[type="text"], input[type="email"], input[type="url"], input[type="tel"],
input[type="number"], input[type="search"], input[type="password"], input[type="date"],
select, textarea {
	width: 100%;
	padding: 14px 16px;
	background: #fff;
	border: 1px solid var(--ca-border);
	border-radius: 0;
	color: var(--ca-navy);
	font-family: inherit;
	font-size: 1rem;
	line-height: 1.4;
	transition: border-color .2s ease, box-shadow .2s ease;
}
input:focus, select:focus, textarea:focus {
	outline: none;
	border-color: var(--ca-blue);
	box-shadow: 0 0 0 2px rgba(42, 163, 220, .18);
}
textarea { min-height: 130px; resize: vertical; }
::placeholder { color: #98a0ae; opacity: 1; }

label { display: block; margin-bottom: 7px; color: var(--ca-navy); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }

input[type="submit"], button[type="submit"] {
	width: auto;
	padding: 15px 34px;
	background: var(--ca-blue-deep);
	border: 0;
	border-radius: 0;
	color: #fff;
	font-family: var(--ca-font-body);
	font-size: .9rem;
	font-weight: 700;
	letter-spacing: .09em;
	text-transform: uppercase;
	cursor: pointer;
	transition: background-color .2s ease;
}
input[type="submit"]:hover, button[type="submit"]:hover { background: var(--ca-navy); }

.ca-field { margin-bottom: 16px; }
.ca-field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.ca-check {
	display: flex;
	align-items: flex-start;
	gap: 10px;
	margin-bottom: 10px;
	font-size: .93rem;
	font-weight: 400;
	letter-spacing: 0;
	text-transform: none;
	color: var(--ca-text);
	cursor: pointer;
}
.ca-check input { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--ca-blue); flex: 0 0 auto; }

.ca-form-note { margin-top: 12px; color: var(--ca-muted); font-size: .82rem; line-height: 1.5; }

.ca-form-status { margin-top: 14px; padding: 12px 16px; border-radius: var(--ca-radius); font-size: .94rem; display: none; }
.ca-form-status.is-visible { display: block; }
.ca-form-status--ok { background: rgba(26, 188, 156, .12); color: #12805f; }
.ca-form-status--error { background: rgba(214, 69, 69, .1); color: #a32c2c; }

.search-form { display: flex; gap: 10px; }
.search-form .search-field { flex: 1 1 auto; }
.search-form .search-submit { flex: 0 0 auto; }

/* ==========================================================================
   7. 页头 / Header
   ========================================================================== */

.ca-promo {
	position: relative;
	z-index: 60;
	padding: 11px 0;
	background: var(--ca-navy);
	color: #fff;
	font-size: .92rem;
	text-align: center;
}
.ca-promo__inner {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 14px;
	flex-wrap: wrap;
	padding-right: 34px;
}
.ca-promo a { color: #fff; text-decoration: underline; text-underline-offset: 3px; font-weight: 600; }
.ca-promo a:hover { opacity: .82; color: #fff; }
.ca-promo__close {
	position: absolute;
	right: var(--ca-gutter); top: 50%;
	transform: translateY(-50%);
	width: 26px; height: 26px;
	display: grid; place-items: center;
	background: none; border: 0;
	color: inherit;
	font-size: 1.15rem;
	line-height: 1;
	cursor: pointer;
	opacity: .7;
}
.ca-promo__close:hover { opacity: 1; }

.ca-header {
	position: relative;
	z-index: 50;
	background: var(--ca-header-bg, #fff);
	border-bottom: 1px solid var(--ca-border);
	transition: box-shadow .25s ease, background-color .25s ease;
}
.ca-header__inner {
	display: flex;
	align-items: center;
	gap: 28px;
	min-height: var(--ca-header-h);
}

.ca-header.is-sticky {
	position: sticky;
	top: 0;
}
.ca-header.is-stuck {
	background: var(--ca-header-sticky-bg, #fff);
	box-shadow: 0 6px 24px rgba(29, 43, 72, .1);
	border-bottom-color: transparent;
}

.ca-brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; margin-right: auto; }
.ca-brand img { max-height: var(--ca-logo-h, 46px); width: auto; }
.ca-brand__text {
	display: flex;
	flex-direction: column;
	line-height: 1.2;
}
.ca-brand__name {
	color: var(--ca-navy);
	font-family: var(--ca-font-heading);
	font-size: 1.24rem;
	font-weight: 700;
	letter-spacing: .01em;
	text-transform: uppercase;
}
.ca-brand__tagline { color: var(--ca-blue); font-size: .64rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.ca-brand:hover .ca-brand__name { color: var(--ca-blue); }

.ca-mark {
	display: grid;
	place-items: center;
	width: 42px; height: 42px;
	flex: 0 0 auto;
	border: 2px solid var(--ca-blue);
	border-radius: 0;
	color: var(--ca-navy);
	font-family: var(--ca-font-heading);
	font-size: 1rem;
	font-weight: 700;
	letter-spacing: 0;
}

/* 主导航 */
.ca-nav { flex: 0 1 auto; }
.ca-nav ul { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.ca-nav li { position: relative; margin: 0; }
.ca-nav a {
	display: block;
	padding: 10px 13px;
	color: var(--ca-nav-color, #10294b);
	font-family: var(--ca-font-body);
	font-size: .82rem;
	font-weight: 700;
	letter-spacing: .1em;
	text-transform: uppercase;
	white-space: nowrap;
	border-radius: 0;
}
.ca-nav a:hover,
.ca-nav a:focus { color: var(--ca-nav-hover, #3c6ab4); }
/* 当前项只换颜色，字重必须和其它菜单项一样（原来 600 比别人的 700 细，
   客户在 Case Studies 页面上一眼就看出这一项和别的不一致）。 */
.ca-nav .current-menu-item > a,
.ca-nav .current-menu-ancestor > a,
.ca-nav .current_page_item > a,
.ca-nav .current_page_ancestor > a { color: var(--ca-nav-active, #3c6ab4); font-weight: 700; }

.ca-nav .menu-item-has-children > a { padding-right: 26px; }
.ca-nav .menu-item-has-children > a::after {
	content: "";
	position: absolute;
	right: 11px; top: 50%;
	width: 6px; height: 6px;
	margin-top: -4px;
	border-right: 2px solid currentColor;
	border-bottom: 2px solid currentColor;
	transform: rotate(45deg);
	opacity: .65;
	transition: transform .2s ease;
}
.ca-nav .menu-item-has-children:hover > a::after { transform: rotate(45deg) translate(2px, 2px); }

.ca-nav ul ul {
	position: absolute;
	left: 0; top: calc(100% + 6px);
	z-index: 40;
	display: block;
	min-width: 264px;
	padding: 10px;
	background: #fff;
	border: 1px solid var(--ca-border);
	border-top: 2px solid var(--ca-blue);
	border-radius: 0;
	box-shadow: var(--ca-shadow);
	opacity: 0;
	visibility: hidden;
	transform: translateY(8px);
	transition: opacity .2s ease, transform .2s ease, visibility .2s;
}
.ca-nav li:hover > ul,
.ca-nav li:focus-within > ul { opacity: 1; visibility: visible; transform: translateY(0); }
.ca-nav ul ul li { width: 100%; }
.ca-nav ul ul a {
	padding: 11px 14px;
	color: var(--ca-navy);
	font-size: .84rem;
	letter-spacing: .04em;
	text-transform: none;
	white-space: normal;
	line-height: 1.4;
}
.ca-nav ul ul a:hover, .ca-nav ul ul a:focus { background: var(--ca-surface); color: var(--ca-blue); }
.ca-nav ul ul ul { left: calc(100% + 8px); top: -10px; }

.ca-header__actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }

.ca-icon-btn {
	display: grid;
	place-items: center;
	width: 42px; height: 42px;
	padding: 0;
	background: none;
	border: 0;
	border-radius: var(--ca-radius);
	color: var(--ca-navy);
	cursor: pointer;
	transition: background-color .2s ease, color .2s ease;
}
.ca-icon-btn:hover, .ca-icon-btn:focus { background: var(--ca-surface); color: var(--ca-blue); }
.ca-icon-btn svg { width: 21px; height: 21px; fill: currentColor; }

.ca-cart-count {
	position: absolute;
	top: 2px; right: 2px;
	min-width: 18px; height: 18px;
	padding: 0 5px;
	display: grid; place-items: center;
	background: var(--ca-blue);
	border-radius: 9px;
	color: #fff;
	font-size: .68rem;
	font-weight: 700;
	line-height: 1;
}
.ca-cart-link { position: relative; }

/* 搜索抽屉 */
.ca-searchbar {
	display: none;
	padding: 22px 0;
	background: var(--ca-surface);
	border-bottom: 1px solid var(--ca-border);
}
.ca-searchbar.is-open { display: block; }

/* 汉堡按钮 */
.ca-burger { display: none; }
.ca-burger span {
	display: block;
	width: 22px; height: 2px;
	margin: 4px 0;
	background: var(--ca-burger, #2b395a);
	border-radius: 2px;
	transition: transform .25s ease, opacity .2s ease;
}
.ca-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.ca-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.ca-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端抽屉 */
.ca-drawer {
	position: fixed;
	inset: 0 0 0 auto;
	z-index: 90;
	width: min(400px, 88vw);
	padding: 28px 26px 40px;
	background: #fff;
	box-shadow: -18px 0 50px rgba(29, 43, 72, .18);
	overflow-y: auto;
	transform: translateX(102%);
	transition: transform .3s cubic-bezier(.4, 0, .2, 1);
	visibility: hidden;
}
.ca-drawer.is-open { transform: translateX(0); visibility: visible; }
.ca-drawer__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.ca-drawer ul { margin: 0; padding: 0; list-style: none; }
.ca-drawer li { margin: 0; border-bottom: 1px solid var(--ca-border); }
.ca-drawer a {
	display: block;
	padding: 14px 2px;
	color: var(--ca-navy);
	font-family: var(--ca-font-heading);
	font-size: 1.02rem;
	font-weight: 500;
}
.ca-drawer a:hover { color: var(--ca-blue); }
.ca-drawer ul ul { padding-left: 16px; display: none; }
.ca-drawer .is-expanded > ul { display: block; }
.ca-drawer ul ul a { font-size: .94rem; font-weight: 400; color: var(--ca-text); }
.ca-drawer ul ul li:last-child { border-bottom: 0; }
.ca-drawer__toggle {
	position: absolute;
	right: 0; top: 8px;
	width: 40px; height: 40px;
	background: none; border: 0;
	color: var(--ca-muted);
	font-size: 1.4rem;
	line-height: 1;
	cursor: pointer;
}
.ca-drawer li { position: relative; }
.ca-drawer .menu-item-has-children > a { padding-right: 44px; }
.ca-drawer__cta { margin-top: 26px; }

.ca-overlay {
	position: fixed;
	inset: 0;
	z-index: 80;
	background: rgba(23, 32, 52, .55);
	opacity: 0;
	visibility: hidden;
	transition: opacity .3s ease, visibility .3s;
}
.ca-overlay.is-open { opacity: 1; visibility: visible; }

/* ==========================================================================
   8. 页脚 / Footer
   ========================================================================== */

.ca-footer {
	background: var(--ca-footer-bg, #1d2b48);
	color: var(--ca-footer-color, rgba(255, 255, 255, .74));
	font-size: .95rem;
}
.ca-footer a { color: var(--ca-footer-link, rgba(255, 255, 255, .74)); }
.ca-footer a:hover, .ca-footer a:focus { color: #fff; }

.ca-footer__main { padding: 74px 0 54px; }
.ca-footer__grid {
	display: grid;
	gap: 40px;
	/* --ca-footer-cols 由 footer.php 按「页脚栏目数」写入完整轨道值 */
	grid-template-columns: var(--ca-footer-cols, repeat(4, minmax(0, 1fr)));
}
.ca-footer__col h3,
.ca-footer__col .ca-footer__title {
	margin-bottom: 22px;
	color: #fff;
	font-family: var(--ca-font-body);
	font-size: .76rem;
	font-weight: 700;
	letter-spacing: .18em;
	text-transform: uppercase;
}
.ca-footer__col ul { margin: 0; padding: 0; list-style: none; }
.ca-footer__col li { margin-bottom: .66em; line-height: 1.5; }
.ca-footer__about p { margin-bottom: 1em; line-height: 1.7; }

.ca-footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.ca-footer__brand img { max-height: 56px; width: auto; }
.ca-footer__brand .ca-brand__name { color: #fff; }
.ca-footer__brand .ca-mark { border-color: rgba(255, 255, 255, .5); color: #fff; }

.ca-footer__social { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.ca-footer__social a {
	display: grid;
	place-items: center;
	width: 40px; height: 40px;
	background: rgba(255, 255, 255, .08);
	border-radius: 0;
	transition: background-color .2s ease;
}
.ca-footer__social a:hover { background: var(--ca-blue); }
.ca-footer__social svg { width: 18px; height: 18px; fill: currentColor; }

.ca-footer__contact li { display: flex; gap: 10px; align-items: flex-start; }
.ca-footer__contact svg { width: 17px; height: 17px; margin-top: 4px; flex: 0 0 auto; fill: var(--ca-blue-light); }

/* 页脚城市链条（SEO 内链） */
.ca-footer__tags { padding: 30px 0; border-top: 1px solid rgba(255, 255, 255, .1); }
.ca-footer__tags .ca-footer__title { margin-bottom: 14px; }
.ca-footer__tags ul { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0; padding: 0; list-style: none; }
.ca-footer__tags li { margin: 0; font-size: .9rem; }

.ca-footer__bottom {
	padding: 24px 0;
	border-top: 1px solid rgba(255, 255, 255, .1);
	font-size: .88rem;
}
.ca-footer__bottom-inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
}
.ca-footer__legal ul { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 0; padding: 0; list-style: none; }
.ca-footer__legal li { margin: 0; }

/* ==========================================================================
   9. 文章内容排版 / Entry content
   ========================================================================== */

.ca-entry { max-width: 100%; }
.ca-entry > *:first-child { margin-top: 0; }
.ca-entry h2 { margin-top: 1.9em; font-size: clamp(1.5rem, 1.2rem + 1vw, 1.95rem); }
.ca-entry h3 { margin-top: 1.6em; font-size: clamp(1.2rem, 1.05rem + .5vw, 1.42rem); }
.ca-entry h4 { margin-top: 1.4em; color: var(--ca-blue); }
.ca-entry ul, .ca-entry ol { padding-left: 1.35em; }
.ca-entry ul li::marker { color: var(--ca-blue); }
.ca-entry img { border-radius: var(--ca-radius-lg); }
.ca-entry a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(1, 112, 185, .4); }
.ca-entry a:hover { text-decoration-color: currentColor; }

.alignleft { float: left; margin: .4em 1.8em 1.2em 0; }
.alignright { float: right; margin: .4em 0 1.2em 1.8em; }
.aligncenter { margin-inline: auto; }
.alignwide { width: min(100vw - 48px, 1180px); margin-inline: auto; }
.alignfull { width: 100vw; max-width: 100vw; margin-left: calc(50% - 50vw); }
.wp-caption { max-width: 100%; }
.sticky .ca-card__title::before { content: "★ "; color: var(--ca-blue); }

/* ==========================================================================
   10. 工具类 / Utilities
   ========================================================================== */

.ca-text-center { text-align: center; }
.ca-mt-0 { margin-top: 0 !important; }
.ca-mb-0 { margin-bottom: 0 !important; }
.ca-mb-1 { margin-bottom: 12px; }
.ca-mb-2 { margin-bottom: 24px; }
.ca-mb-3 { margin-bottom: 36px; }
.ca-mb-4 { margin-bottom: 48px; }
.ca-muted { color: var(--ca-muted); }
.ca-hide { display: none !important; }

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation-duration: .01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: .01ms !important;
	}
}

/* ==========================================================================
   11. 响应式 / Responsive
   ========================================================================== */

@media (max-width: 1200px) {
	:root { --ca-section-y: 78px; }
	.ca-split { gap: 44px; }

	/* 主导航含 Home 共 7 个一级项，笔记本宽度下逐级收紧间距，
	   保证在切换到汉堡菜单（≤991px）之前始终单行且不产生横向滚动。 */
	.ca-header__inner { gap: 18px; }
	.ca-nav ul { gap: 0; }
	.ca-nav a { padding-inline: 9px; letter-spacing: .07em; }
	.ca-nav .menu-item-has-children > a { padding-right: 22px; }
	.ca-header__actions { gap: 8px; }
}

@media (max-width: 1090px) {
	.ca-header__inner { gap: 12px; }
	.ca-nav a { padding-inline: 6px; font-size: .78rem; letter-spacing: .04em; }
	.ca-nav .menu-item-has-children > a { padding-right: 18px; }
	.ca-header__actions .ca-btn { padding-inline: 20px; }
}

@media (max-width: 991px) {
	:root { --ca-section-y: 66px; --ca-header-h: 72px; }
	.ca-nav { display: none; }
	.ca-burger { display: block; }
	.ca-header__actions .ca-btn { display: none; }
	.ca-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.ca-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.ca-split,
	.ca-split--wide-left { grid-template-columns: minmax(0, 1fr); gap: 40px; }
	.ca-footer__main { padding: 56px 0 40px; }
	/* 页脚：品牌介绍占满一行，其余栏目两列 */
	.ca-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px 28px; }
	.ca-footer__about { grid-column: 1 / -1 !important; }

	/* 触控目标不小于 48px（最终说明第二十条） */
	.ca-icon-btn,
	.ca-burger { min-width: 48px; min-height: 48px; }
}

@media (max-width: 767px) {
	:root { --ca-fs-base: 16px; --ca-section-y: 56px; --ca-gutter: 20px; --ca-rule-w: 84px; }

	/* 大写按钮文案在窄屏容易撑破，缩小字号并允许换行；高度保持 ≥48px 触控目标 */
	.ca-btn {
		padding: 16px 22px;
		min-height: 48px;
		font-size: .82rem;
		letter-spacing: .07em;
		hyphens: auto;
	}
	.ca-brand { min-height: 48px; }
	.ca-eyebrow { letter-spacing: .14em; font-size: .74rem; }
	.ca-caps-headings .ca-hero__title,
	.ca-caps-headings .ca-section-head h2,
	.ca-caps-headings .ca-page-head h1 { word-break: break-word; }
	.ca-grid { gap: 20px; }
	.ca-grid--2, .ca-grid--3, .ca-grid--4 { grid-template-columns: minmax(0, 1fr); }
	.ca-field-row { grid-template-columns: minmax(0, 1fr); }
	.ca-section-head { margin-bottom: 36px; }
	.ca-btn { width: 100%; }
	.ca-btn-group { flex-direction: column; }
	.ca-btn--text { width: auto; }
	.alignleft, .alignright { float: none; margin: 1.4em 0; }
	.ca-footer__bottom-inner { flex-direction: column; align-items: flex-start; }
	.ca-answer { padding: 20px 22px 20px 24px; }

	/* 页脚在手机上完全堆叠，避免栏目被压到几十像素宽 */
	.ca-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }

	/*
	 * 触控目标 ≥48px（最终说明第二十条）。
	 * 正文行内链接不算控件，只放大独立的链接/清单项/复选框。
	 */
	.ca-footer__col li a,
	.ca-footer__contact li a,
	.ca-more,
	.ca-nav-mobile a { display: inline-flex; align-items: center; min-height: 48px; }
	.ca-footer__col li { margin-bottom: 0; }

	/* 整行 label 都可点，勾选框本身也放大 */
	.ca-check { min-height: 48px; align-items: center; margin-bottom: 4px; }
	.ca-check input { width: 24px; height: 24px; margin: 0; }

	/* 案例/FAQ 分类筛选按钮、文章卡上的分类标签 */
	.ca-faq-cat { min-height: 48px; }
	.ca-post__cat a { display: inline-flex; align-items: center; min-height: 48px; }
}

@media (max-width: 575px) {
	.ca-promo__inner { font-size: .86rem; gap: 8px; }
	.ca-brand__name { font-size: 1.02rem; }
	.ca-brand__tagline { font-size: .58rem; letter-spacing: .12em; }
	.ca-btn { font-size: .78rem; letter-spacing: .05em; padding: 13px 18px; }
	.ca-brand img { max-height: 40px; }
}