/*
Theme Name: CourseNest
Theme URI: https://www.zhiliaowp.com/themes/coursenest/
Author: 知了主题
Author URI: https://www.zhiliaowp.com/
Description: CourseNest（知了课堂）是一款在线课程 / 知识付费 WordPress 主题：课程—章节—课时结构、视频与图文课时、免费试看、会员或单课付费解锁、学习进度、讲师入驻，配可视化后台、虎皮椒支付、一键演示数据与内置 SEO，开箱即用。
Version: 1.7.0
Requires at least: 6.0
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: coursenest
Tags: education, custom-logo, custom-menu, featured-images, translation-ready, threaded-comments
*/

:root {
	--cn-primary: #4f46e5;
	--cn-primary-deep: #3c34c4;
	--cn-accent: #f59e0b;
	--cn-accent-soft: #fff5e5;
	--cn-bg: #f8f7f4;
	--cn-panel: #ffffff;
	--cn-soft: #f3f1ec;
	--cn-text: #171429;
	--cn-muted: #6b6880;
	--cn-border: #e9e6df;
	--cn-radius: 18px;
	--cn-shadow: 0 24px 48px -28px rgba(52, 44, 130, .35);
	--cn-container: 1180px;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--cn-bg); color: var(--cn-text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 15.5px; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; }
h1, h2, h3 { line-height: 1.3; }
::selection { background: color-mix(in srgb, var(--cn-primary) 22%, transparent); }

.cn-container { width: min(var(--cn-container), calc(100% - 40px)); margin: 0 auto; }
.cn-main { padding: 36px 0 60px; }
.cn-skip { position: absolute; left: -9999px; }
.cn-skip:focus { left: 16px; top: 16px; z-index: 999; background: #fff; padding: 8px 14px; border-radius: 8px; }

/* 按钮（学院风：胶囊型） */
.cn-btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 10px 22px; border-radius: 999px; background: linear-gradient(135deg, var(--cn-primary), var(--cn-primary-deep)); color: #fff; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease; }
.cn-btn:hover { transform: translateY(-1px); box-shadow: 0 14px 26px -14px var(--cn-primary); }
.cn-btn:disabled { opacity: .6; cursor: default; transform: none; }
.cn-btn-ghost { background: var(--cn-panel); color: var(--cn-text); border-color: var(--cn-border); }
.cn-btn-lg { padding: 13px 30px; font-size: 16px; }
.cn-btn-block { width: 100%; }
.cn-icon { flex: none; vertical-align: middle; }

/* 头部 */
.cn-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .92); backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--cn-border); }
.cn-header-inner { display: flex; align-items: center; gap: 20px; height: 68px; }
.cn-brand img, .cn-brand .custom-logo { max-height: 40px; width: auto; }
.cn-brand-text { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; }
.cn-brand-mark { width: 36px; height: 36px; border-radius: 10px; display: block; }
.cn-nav { margin-left: 8px; }
.cn-nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.cn-nav a { display: inline-flex; padding: 8px 12px; border-radius: 9px; color: var(--cn-muted); font-weight: 600; }
.cn-nav a:hover, .cn-nav .current-menu-item > a { color: var(--cn-text); background: var(--cn-soft); }
.cn-header-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.cn-menu-toggle { display: none; flex-direction: column; gap: 4px; width: 40px; height: 40px; align-items: center; justify-content: center; background: var(--cn-soft); border: 1px solid var(--cn-border); border-radius: 10px; cursor: pointer; }
.cn-menu-toggle span { width: 18px; height: 2px; background: var(--cn-text); border-radius: 2px; }

/* Hero（学院风：深靛蓝渐变大横幅 + 白字 + 统计条） */
.cn-hero { position: relative; padding: 84px 0 96px; background: linear-gradient(128deg, #3a2fb8 0%, var(--cn-primary) 46%, #7c6cf0 100%); color: #fff; overflow: hidden; }
.cn-hero::before { content: ""; position: absolute; right: -140px; top: -180px; width: 520px; height: 520px; border-radius: 50%; background: rgba(255, 255, 255, .09); }
.cn-hero::after { content: ""; position: absolute; right: 120px; bottom: -220px; width: 420px; height: 420px; border-radius: 50%; background: rgba(255, 255, 255, .07); }
.cn-hero > .cn-container { position: relative; z-index: 1; }
.cn-hero-badge { display: inline-block; padding: 6px 16px; border-radius: 999px; background: rgba(255, 255, 255, .16); color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .4px; }
.cn-hero h1 { font-size: clamp(30px, 4.4vw, 48px); margin: 20px 0 14px; letter-spacing: -.5px; color: #fff; }
.cn-hero-sub { max-width: 640px; color: rgba(255, 255, 255, .82); font-size: 17px; margin: 0 0 28px; }
.cn-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cn-hero-actions .cn-btn { background: #fff; color: var(--cn-primary-deep); }
.cn-hero-actions .cn-btn:hover { box-shadow: 0 16px 30px -14px rgba(0, 0, 0, .45); }
.cn-hero-actions .cn-btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.cn-hero-stats { display: flex; gap: 38px; flex-wrap: wrap; margin-top: 38px; }
.cn-hero-stats b { display: block; font-size: 28px; font-variant-numeric: tabular-nums; }
.cn-hero-stats span { color: rgba(255, 255, 255, .72); font-size: 13.5px; }

/* Section */
.cn-section { padding: 58px 0; }
.cn-section-alt { background: var(--cn-panel); border-block: 1px solid var(--cn-border); }
.cn-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
.cn-section-head h2 { position: relative; font-size: 25px; margin: 0; padding-left: 16px; }
.cn-section-head h2::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 5px; border-radius: 4px; background: linear-gradient(180deg, var(--cn-accent), var(--cn-primary)); }
.cn-section-head a { color: var(--cn-primary); font-weight: 650; display: inline-flex; align-items: center; gap: 4px; }

/* 课程网格 + 卡片（封面主导、悬停缩放、琥珀价格） */
.cn-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.cn-card { background: var(--cn-panel); border: 1px solid transparent; border-radius: var(--cn-radius); overflow: hidden; display: flex; flex-direction: column; box-shadow: 0 2px 10px -6px rgba(35, 30, 80, .18); transition: transform .18s ease, box-shadow .18s ease; }
.cn-card:hover { transform: translateY(-5px); box-shadow: var(--cn-shadow); }
.cn-card-cover { position: relative; display: block; aspect-ratio: 16 / 10; background: var(--cn-soft); overflow: hidden; }
.cn-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.cn-card:hover .cn-card-cover img { transform: scale(1.045); }
.cn-card-noimg { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: color-mix(in srgb, var(--cn-primary) 55%, var(--cn-muted)); background: linear-gradient(135deg, color-mix(in srgb, var(--cn-primary) 14%, #fff), color-mix(in srgb, var(--cn-primary) 5%, #fff)); }
.cn-card-level { position: absolute; left: 10px; top: 10px; padding: 3px 11px; border-radius: 999px; background: rgba(23, 20, 41, .62); backdrop-filter: blur(4px); color: #fff; font-size: 12px; }
.cn-card-body { padding: 16px 17px 17px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.cn-card-body h3 { font-size: 16px; margin: 0; }
.cn-card-body p { margin: 0; color: var(--cn-muted); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cn-card-meta { margin-top: auto; display: flex; align-items: center; justify-content: space-between; color: var(--cn-muted); font-size: 13px; }
.cn-card-lessons { display: inline-flex; align-items: center; gap: 4px; }
.cn-card-price b { color: #d97706; font-size: 18px; }
.cn-card-price s { color: var(--cn-muted); font-size: 12px; margin-left: 4px; }
.cn-card-price .cn-free { color: #10b981; }
.cn-card-vip { display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 6px; background: #fff7ed; color: #c2410c; font-size: 11px; font-style: normal; }

/* 特性 */
.cn-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cn-feature { background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 26px; transition: transform .16s ease, box-shadow .16s ease; }
.cn-feature:hover { transform: translateY(-3px); box-shadow: var(--cn-shadow); }
.cn-feature-icon { display: inline-flex; padding: 12px; border-radius: 14px; background: color-mix(in srgb, var(--cn-primary) 12%, var(--cn-panel)); color: var(--cn-primary); }
.cn-feature:nth-child(2) .cn-feature-icon { background: var(--cn-accent-soft); color: #d97706; }
.cn-feature:nth-child(3) .cn-feature-icon { background: #ecfdf5; color: #059669; }
.cn-feature h3 { margin: 14px 0 8px; font-size: 18px; }
.cn-feature p { margin: 0; color: var(--cn-muted); }

/* 会员定价 */
.cn-plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.cn-plan { position: relative; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 28px 26px; text-align: center; transition: transform .16s ease, box-shadow .16s ease; }
.cn-plan:hover { transform: translateY(-3px); box-shadow: var(--cn-shadow); }
.cn-plan:nth-child(2) { border-color: color-mix(in srgb, var(--cn-primary) 45%, var(--cn-border)); box-shadow: var(--cn-shadow); }
.cn-plan:nth-child(2)::before { content: "最受欢迎"; position: absolute; top: -12px; left: 50%; transform: translateX(-50%); padding: 3px 14px; border-radius: 999px; background: linear-gradient(135deg, var(--cn-accent), #f97316); color: #fff; font-size: 12px; font-weight: 700; }
.cn-plan h3 { margin: 0 0 6px; }
.cn-plan-price { font-size: 34px; font-weight: 800; color: var(--cn-primary); }
.cn-plan p { color: var(--cn-muted); margin: 4px 0 18px; }

/* 归档 */
.cn-archive-head h1 { font-size: 28px; margin: 0 0 18px; }
.cn-cat-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.cn-cat-filter a { padding: 7px 14px; border-radius: 999px; background: var(--cn-panel); border: 1px solid var(--cn-border); color: var(--cn-muted); font-weight: 600; font-size: 14px; }
.cn-cat-filter a.is-active, .cn-cat-filter a:hover { background: var(--cn-primary); color: #fff; border-color: var(--cn-primary); }
.cn-empty { padding: 50px; text-align: center; color: var(--cn-muted); background: var(--cn-panel); border: 1px dashed var(--cn-border); border-radius: var(--cn-radius); }
.cn-pagination { display: flex; gap: 8px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }
.cn-pagination .page-numbers { padding: 8px 14px; border-radius: 9px; border: 1px solid var(--cn-border); background: var(--cn-panel); color: var(--cn-muted); }
.cn-pagination .current { background: var(--cn-primary); color: #fff; border-color: var(--cn-primary); }

/* 课程详情 */
.cn-course-hero { background: var(--cn-panel); border-bottom: 1px solid var(--cn-border); padding: 40px 0; }
.cn-course-hero-grid { display: grid; grid-template-columns: 1fr 360px; gap: 34px; align-items: start; }
.cn-course-cats { display: flex; gap: 8px; margin-bottom: 12px; }
.cn-course-cats a { font-size: 13px; color: var(--cn-primary); font-weight: 650; }
.cn-course-hero-main h1 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 12px; }
.cn-course-sub { color: var(--cn-muted); font-size: 16px; max-width: 620px; }
.cn-course-facts { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; color: var(--cn-muted); font-size: 14px; }
.cn-course-facts span { display: inline-flex; align-items: center; gap: 5px; }
.cn-course-buy { position: sticky; top: 86px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: 18px; padding: 18px; box-shadow: var(--cn-shadow); }
.cn-course-thumb { border-radius: 12px; overflow: hidden; margin-bottom: 14px; aspect-ratio: 16/10; }
.cn-course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cn-course-price { margin-bottom: 14px; }
.cn-course-price b { font-size: 30px; color: var(--cn-primary); }
.cn-course-price s { color: var(--cn-muted); margin-left: 8px; }
.cn-course-price .cn-free { color: #10b981; }
.cn-course-buy .cn-btn { margin-top: 10px; }
.cn-course-vip-hint { display: flex; align-items: center; gap: 6px; color: #c2410c; background: #fff7ed; padding: 8px 12px; border-radius: 9px; font-size: 13px; margin: 6px 0 0; }
.cn-course-note { color: var(--cn-muted); font-size: 13px; }
.cn-progress { height: 8px; border-radius: 999px; background: var(--cn-soft); overflow: hidden; margin-bottom: 6px; }
.cn-progress-bar { height: 100%; background: var(--cn-primary); }
.cn-progress-text { color: var(--cn-muted); }

.cn-course-body { display: grid; grid-template-columns: 1fr 320px; gap: 34px; padding: 40px 0 60px; align-items: start; }
.cn-block { margin-bottom: 34px; }
.cn-block h2 { font-size: 21px; margin: 0 0 16px; }
.cn-learn-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cn-learn-list li { display: flex; gap: 8px; align-items: flex-start; }
.cn-learn-list .cn-icon { color: #10b981; margin-top: 3px; }

/* 目录 */
.cn-curriculum { border: 1px solid var(--cn-border); border-radius: var(--cn-radius); overflow: hidden; background: var(--cn-panel); }
.cn-section-group { border-bottom: 1px solid var(--cn-border); }
.cn-section-group:last-child { border-bottom: 0; }
.cn-section-group h3 { display: flex; justify-content: space-between; align-items: center; margin: 0; padding: 14px 18px; background: var(--cn-soft); font-size: 15px; }
.cn-section-group h3 span { color: var(--cn-muted); font-size: 13px; font-weight: 500; }
.cn-section-group ul { list-style: none; margin: 0; padding: 0; }
.cn-section-group li a { display: flex; align-items: center; gap: 10px; padding: 12px 18px; border-top: 1px solid var(--cn-border); color: var(--cn-text); }
.cn-section-group li:first-child a { border-top: 0; }
.cn-section-group li a:hover { background: var(--cn-soft); }
.cn-section-group li.is-locked .cn-icon { color: var(--cn-muted); }
.cn-section-group li.is-open .cn-icon { color: var(--cn-primary); }
.cn-lesson-title { flex: 1; }
.cn-lesson-dur { color: var(--cn-muted); font-size: 13px; }
.cn-tag-free { font-style: normal; font-size: 11px; color: #10b981; border: 1px solid currentColor; border-radius: 6px; padding: 0 6px; }

.cn-side-box { background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 18px; margin-bottom: 20px; }
.cn-side-box h3 { margin: 0 0 12px; font-size: 16px; }
.cn-side-box ul { margin: 0; padding-left: 18px; color: var(--cn-muted); }
.cn-teacher-row { display: flex; gap: 12px; }
.cn-teacher-row img { border-radius: 50%; }
.cn-teacher-row strong { display: block; }
.cn-teacher-row p { margin: 4px 0 0; color: var(--cn-muted); font-size: 13px; }

/* 课时播放 */
.cn-lesson-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 30px; padding: 30px 0 60px; align-items: start; }
.cn-lesson-crumb a { display: inline-flex; align-items: center; gap: 6px; color: var(--cn-muted); font-size: 14px; }
.cn-lesson-title { font-size: 24px; margin: 10px 0 18px; }
.cn-player { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: 14px; overflow: hidden; margin-bottom: 22px; }
.cn-player video, .cn-player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.cn-lesson-content { background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 24px; }
.cn-lesson-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 22px; flex-wrap: wrap; }
.cn-lesson-nav { display: flex; gap: 10px; margin-left: auto; }
.is-done { color: #10b981 !important; }
.cn-lesson-locked { text-align: center; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 60px 24px; }
.cn-lock-icon { color: var(--cn-muted); }
.cn-lesson-locked h2 { margin: 14px 0 8px; }
.cn-lesson-locked p { color: var(--cn-muted); margin: 0 0 20px; }
.cn-side-section { margin-bottom: 14px; }
.cn-side-section strong { display: block; margin-bottom: 6px; font-size: 14px; }
.cn-side-section ul { list-style: none; margin: 0; padding: 0; }
.cn-side-section li a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; color: var(--cn-muted); font-size: 14px; }
.cn-side-section li a:hover { background: var(--cn-soft); }
.cn-side-section li.is-current a { background: color-mix(in srgb, var(--cn-primary) 12%, var(--cn-panel)); color: var(--cn-primary); font-weight: 650; }
.cn-side-section li span { flex: 1; }

/* 文章 */
.cn-single { max-width: 820px; }
.cn-single-title { font-size: 30px; margin: 0 0 10px; }
.cn-single-thumb { border-radius: var(--cn-radius); overflow: hidden; margin: 16px 0; }
.cn-article-content { font-size: 16px; }
.cn-article-content img { border-radius: 10px; }
.cn-article-content h2 { margin-top: 1.6em; }
.cn-post-list { display: grid; gap: 20px; }
.cn-post-item { display: grid; grid-template-columns: 240px 1fr; gap: 20px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); overflow: hidden; }
.cn-post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cn-post-body { padding: 18px 20px; }
.cn-post-body h2 { margin: 0 0 6px; font-size: 20px; }
.cn-post-meta { color: var(--cn-muted); font-size: 13px; }
.cn-more { color: var(--cn-primary); font-weight: 650; display: inline-flex; align-items: center; gap: 4px; }

/* 弹窗 */
.cn-modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.cn-modal[hidden] { display: none; }
.cn-modal-mask { position: absolute; inset: 0; background: rgba(10, 14, 30, .55); }
.cn-modal-panel { position: relative; background: var(--cn-panel); border-radius: 16px; padding: 26px; width: min(360px, calc(100% - 32px)); text-align: center; box-shadow: var(--cn-shadow); }
.cn-modal-close { position: absolute; right: 12px; top: 10px; border: 0; background: none; font-size: 24px; cursor: pointer; color: var(--cn-muted); }
.cn-modal-qr { display: flex; justify-content: center; margin: 14px 0; min-height: 200px; }
.cn-modal-qr img { width: 200px; height: 200px; }
.cn-modal-tip { color: var(--cn-muted); font-size: 13px; }

/* 页脚 */
.cn-footer { background: var(--cn-panel); border-top: 1px solid var(--cn-border); padding: 30px 0; margin-top: 40px; }
.cn-footer-copy { color: var(--cn-muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.cn-credit a { color: var(--cn-primary); }

/* 用户中心 */
.cn-account-head { margin-bottom: 24px; }
.cn-account-head h1 { font-size: 26px; margin: 0 0 8px; }
.cn-account-member { display: inline-flex; align-items: center; gap: 6px; color: var(--cn-muted); background: var(--cn-panel); border: 1px solid var(--cn-border); padding: 6px 14px; border-radius: 999px; }
.cn-account-member a { color: var(--cn-primary); font-weight: 650; margin-left: 6px; }
.cn-orders-wrap { overflow-x: auto; border: 1px solid var(--cn-border); border-radius: var(--cn-radius); background: var(--cn-panel); }
.cn-orders { width: 100%; min-width: 640px; border-collapse: collapse; }
.cn-orders th, .cn-orders td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--cn-border); font-size: 14px; }
.cn-orders th { background: var(--cn-soft); color: var(--cn-muted); }
.cn-orders tr:last-child td { border-bottom: 0; }

/* 评分 / 优惠券 / 证书 / 学习统计 */
.cn-stars { display: inline-flex; gap: 1px; vertical-align: middle; }
.cn-star { color: #d7dbe6; line-height: 0; }
.cn-star.is-on { color: #f59e0b; }
.cn-card-rating { display: flex; align-items: center; gap: 6px; color: var(--cn-muted); font-size: 12px; }
.cn-course-rating { display: flex; align-items: center; gap: 8px; margin: 10px 0 0; }
.cn-course-rating b { color: #f59e0b; }
.cn-course-rating span { color: var(--cn-muted); font-size: 13px; }
.cn-rating-field { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.cn-rating-input { display: inline-flex; flex-direction: row-reverse; gap: 2px; }
.cn-rating-star { cursor: pointer; color: #d7dbe6; line-height: 0; position: relative; }
.cn-rating-star input { position: absolute; opacity: 0; width: 0; height: 0; }
.cn-rating-star:hover, .cn-rating-star:hover ~ .cn-rating-star, .cn-rating-star:has(input:checked), .cn-rating-star:has(input:checked) ~ .cn-rating-star { color: #f59e0b; }
.cn-coupon-row { display: flex; gap: 8px; margin: 10px 0; }
.cn-coupon-row input { flex: 1; border: 1px solid var(--cn-border); border-radius: 9px; padding: 9px 12px; }
.cn-coupon-msg { color: var(--cn-primary); font-size: 13px; min-height: 18px; margin: 0 0 8px; }
.cn-cert-link { display: inline-flex; align-items: center; gap: 4px; color: #c2410c; font-weight: 650; font-size: 13px; margin-top: 8px; }
.cn-account-stat { display: inline-flex; align-items: center; gap: 6px; color: var(--cn-muted); margin: 8px 0 0; }

/* 站点底座：公告 / 广告 / 侧栏 / 页脚 / 友链 / 小工具 */
.cn-announce { background: var(--cn-primary); color: #fff; font-size: 14px; }
.cn-announce-inner { display: flex; align-items: center; gap: 12px; min-height: 42px; }
.cn-announce-track { flex: 1; position: relative; overflow: hidden; height: 22px; }
.cn-announce-item { position: absolute; inset: 0; opacity: 0; transition: opacity .4s ease; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: flex; align-items: center; }
.cn-announce-item.is-active { opacity: 1; }
.cn-announce a { color: #fff; text-decoration: underline; }
.cn-announce-close { background: none; border: 0; color: #fff; font-size: 20px; cursor: pointer; line-height: 1; opacity: .85; }
.cn-ad { margin: 0 0 20px; }
.cn-ad img { display: block; max-width: 100%; height: auto; border-radius: 10px; }
.cn-ad-wrap { padding-top: 24px; }
.cn-layout { display: grid; gap: 30px; align-items: start; }
.cn-layout:has(.cn-sidebar) { grid-template-columns: minmax(0, 1fr) 300px; }
.cn-sidebar { display: grid; gap: 20px; }
.cn-widget { background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 18px; }
.cn-widget-title { margin: 0 0 12px; font-size: 16px; }
.cn-footer-top { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; padding-bottom: 24px; margin-bottom: 20px; border-bottom: 1px solid var(--cn-border); }
.cn-footer-nav ul, .cn-footer-links ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.cn-footer-links h4, .cn-fwidget-title { margin: 0 0 12px; font-size: 15px; }
.cn-footer-nav a, .cn-footer-links a { color: var(--cn-muted); }
.cn-footer-nav a:hover, .cn-footer-links a:hover { color: var(--cn-primary); }
.cn-links-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.cn-link-card { display: block; text-align: center; padding: 16px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: 12px; font-weight: 600; transition: transform .15s ease, border-color .15s ease; }
.cn-link-card:hover { transform: translateY(-2px); border-color: var(--cn-primary); color: var(--cn-primary); }
@media (max-width: 820px) { .cn-layout:has(.cn-sidebar) { grid-template-columns: 1fr; } }

/* 细节补齐：滚动锁 / 通用正文 / 杂项 */
body.cn-modal-open { overflow: hidden; }
.cn-article { line-height: 1.85; font-size: 16px; }
.cn-article h2, .cn-article h3 { margin: 1.4em 0 .6em; }
.cn-article p { margin: 0 0 1em; }
.cn-article img { max-width: 100%; height: auto; border-radius: 10px; }
.cn-article pre { overflow-x: auto; background: var(--cn-soft); border: 1px solid var(--cn-border); border-radius: 10px; padding: 14px; font-size: 14px; }
.cn-article blockquote { margin: 0 0 1em; padding: 10px 16px; border-left: 3px solid var(--cn-primary); background: var(--cn-soft); border-radius: 0 10px 10px 0; color: var(--cn-muted); }
.cn-modal-product { color: var(--cn-muted); }
.cn-modal-product b { color: var(--cn-primary); font-size: 18px; }
.cn-no-comments { color: var(--cn-muted); font-size: 14px; }
.cn-search-toggle { padding: 9px 12px; }
.comment-navigation { display: flex; justify-content: space-between; margin: 14px 0; font-size: 14px; }

/* 继续学习横幅 */
.cn-resume-banner { display: flex; align-items: center; gap: 10px; padding: 14px 18px; margin-bottom: 24px; border-radius: 12px; background: color-mix(in srgb, var(--cn-primary) 10%, var(--cn-panel)); border: 1px solid color-mix(in srgb, var(--cn-primary) 30%, var(--cn-border)); color: var(--cn-primary); font-weight: 700; }
.cn-resume-banner span { flex: 1; }
.cn-resume-banner:hover { background: color-mix(in srgb, var(--cn-primary) 16%, var(--cn-panel)); }

/* 头部搜索弹层 */
.cn-search-panel { border-top: 1px solid var(--cn-border); background: var(--cn-panel); }
.cn-search-form { display: flex; gap: 10px; padding: 14px 20px; }
.cn-search-form input[type="search"] { flex: 1; padding: 10px 14px; border: 1px solid var(--cn-border); border-radius: 10px; font-size: 15px; background: var(--cn-bg); color: var(--cn-text); }
.cn-search-form input[type="search"]:focus { outline: 2px solid color-mix(in srgb, var(--cn-primary) 40%, transparent); border-color: var(--cn-primary); }

/* 登录注册 */
.cn-auth-wrap { display: flex; justify-content: center; padding-top: 40px; }
.cn-auth-card { width: 100%; max-width: 420px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 28px; box-shadow: var(--cn-shadow); }
.cn-auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.cn-auth-tab { flex: 1; padding: 10px; border: 1px solid var(--cn-border); background: var(--cn-bg); border-radius: 10px; font-weight: 700; cursor: pointer; color: var(--cn-muted); }
.cn-auth-tab.is-active { background: var(--cn-primary); border-color: var(--cn-primary); color: #fff; }
.cn-auth-form { display: grid; gap: 14px; }
.cn-auth-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; color: var(--cn-muted); }
.cn-auth-form input { padding: 11px 14px; border: 1px solid var(--cn-border); border-radius: 10px; font-size: 15px; background: var(--cn-bg); color: var(--cn-text); }
.cn-auth-form input:focus { outline: 2px solid color-mix(in srgb, var(--cn-primary) 40%, transparent); border-color: var(--cn-primary); }
.cn-auth-msg { margin: 0; min-height: 1.2em; font-size: 14px; color: #dc2626; }
.cn-auth-alt { margin: 0; font-size: 14px; text-align: center; }
.cn-auth-legal { margin: 0; font-size: 12px; color: var(--cn-muted); text-align: center; }
.cn-auth-sub { color: var(--cn-muted); }
.cn-auth-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.cn-hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }

/* 评论区 */
.cn-comments { margin-top: 10px; }
.cn-comments-title, .comment-reply-title { font-size: 18px; margin: 0 0 16px; }
.cn-commentlist, .cn-commentlist .children { list-style: none; margin: 0; padding: 0; }
.cn-commentlist .children { margin-left: 44px; }
.cn-commentlist .comment, .cn-commentlist .pingback { padding: 14px 0; border-bottom: 1px solid var(--cn-border); }
.cn-commentlist .comment-body { display: grid; gap: 6px; }
.cn-commentlist .comment-author { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.cn-commentlist .comment-author .avatar { border-radius: 50%; }
.cn-commentlist .comment-author .says { display: none; }
.cn-commentlist .comment-metadata { font-size: 12px; }
.cn-commentlist .comment-metadata a { color: var(--cn-muted); }
.cn-commentlist .comment-content { font-size: 15px; line-height: 1.75; }
.cn-commentlist .comment-content p { margin: 0 0 8px; }
.cn-commentlist .reply { font-size: 13px; }
.cn-commentlist .comment-awaiting-moderation { color: #b45309; font-size: 13px; }
.comment-respond { margin-top: 22px; }
.comment-respond p { margin: 0 0 14px; }
.comment-respond label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 600; color: var(--cn-muted); }
.comment-respond input[type="text"], .comment-respond input[type="email"], .comment-respond input[type="url"], .comment-respond textarea { width: 100%; padding: 11px 14px; border: 1px solid var(--cn-border); border-radius: 10px; font-size: 15px; background: var(--cn-bg); color: var(--cn-text); box-sizing: border-box; }
.comment-respond textarea { min-height: 120px; resize: vertical; }
.comment-reply-title small { margin-left: 10px; font-size: 13px; }

/* 星级评分输入（纯 CSS 高亮） */
.cn-rating-field { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; }
.cn-rating-field > label { margin: 0; font-weight: 600; color: var(--cn-muted); }
.cn-rating-input { display: inline-flex; flex-direction: row-reverse; gap: 2px; }
.cn-rating-input input { position: absolute; opacity: 0; pointer-events: none; }
.cn-rating-star { cursor: pointer; color: #d1d5db; transition: color .1s ease; display: inline-flex; }
.cn-rating-star:hover, .cn-rating-star:hover ~ .cn-rating-star { color: #f59e0b; }
.cn-rating-star:has(input:checked), .cn-rating-star:has(input:checked) ~ .cn-rating-star { color: #f59e0b; }

/* 响应式 */
@media (max-width: 1024px) {
	.cn-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.cn-course-hero-grid, .cn-course-body, .cn-lesson-wrap { grid-template-columns: 1fr; }
	.cn-course-buy { position: static; }
}
@media (max-width: 820px) {
	.cn-nav { display: none; position: absolute; left: 20px; right: 20px; top: 66px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: 14px; padding: 10px; box-shadow: var(--cn-shadow); }
	body.cn-menu-open .cn-nav { display: block; }
	.cn-nav ul { flex-direction: column; }
	.cn-menu-toggle { display: flex; }
	.cn-grid, .cn-feature-grid, .cn-plan-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.cn-learn-list { grid-template-columns: 1fr; }
	.cn-post-item { grid-template-columns: 1fr; }
	.cn-post-thumb img { max-height: 200px; }
}
@media (max-width: 520px) {
	.cn-grid, .cn-feature-grid, .cn-plan-grid { grid-template-columns: 1fr; }
	.cn-search-link span, .cn-header-actions .cn-btn span { display: none; }
}
/* 钱包 / 卡密 / 推广 */
.cn-wallet-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.cn-wallet-box { background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 20px 22px; }
.cn-wallet-box h3 { margin: 0 0 10px; font-size: 16px; }
.cn-wallet-sub { margin-top: 18px; }
.cn-wallet-balance { font-size: 30px; font-weight: 800; color: var(--cn-primary); margin: 0 0 14px; }
.cn-wallet-tip { color: var(--cn-muted); font-size: 13px; margin: 0 0 10px; }
.cn-redeem-form { display: flex; gap: 8px; flex-wrap: wrap; }
.cn-redeem-form input { flex: 1; min-width: 140px; padding: 10px 12px; border: 1px solid var(--cn-border); border-radius: 10px; font-size: 14px; background: var(--cn-bg); color: var(--cn-text); }
.cn-wallet-msg { min-height: 1.2em; font-size: 13px; color: var(--cn-primary); margin: 8px 0 0; }
.cn-wallet-log { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 6px; font-size: 13px; }
.cn-wallet-log li { display: flex; justify-content: space-between; gap: 10px; padding: 6px 10px; border-radius: 8px; background: var(--cn-soft); }
.cn-wallet-log .is-in { color: #16a34a; }
.cn-wallet-log .is-out { color: #dc2626; }

/* 微信登录按钮 */
.cn-btn-wechat { background: #07c160; border-color: #07c160; color: #fff; }
.cn-btn-wechat:hover { background: #06ad56; }

/* 限时促销 */
.cn-sale-timer { margin: 0 0 12px; font-size: 13px; color: #b91c1c; background: #fef2f2; border: 1px solid #fecaca; border-radius: 10px; padding: 8px 12px; }
.cn-sale-timer b { font-variant-numeric: tabular-nums; }

/* 随堂小测 / 课时讨论 */
.cn-lesson-quiz { margin-top: 26px; background: var(--cn-panel); border: 1px solid var(--cn-border); border-radius: var(--cn-radius); padding: 20px 22px; }
.cn-lesson-quiz h2 { margin: 0 0 14px; font-size: 19px; }
.cn-lquiz-item { margin-bottom: 16px; }
.cn-lquiz-q { font-weight: 650; margin: 0 0 8px; }
.cn-lquiz-opts { display: grid; gap: 8px; }
.cn-lquiz-opt { text-align: left; padding: 10px 14px; border: 1px solid var(--cn-border); background: var(--cn-bg); border-radius: 10px; cursor: pointer; font-size: 14px; color: var(--cn-text); transition: border-color .12s ease; }
.cn-lquiz-opt:hover { border-color: var(--cn-primary); }
.cn-lquiz-opt.is-right { border-color: #16a34a; background: #f0fdf4; color: #166534; }
.cn-lquiz-opt.is-wrong { border-color: #dc2626; background: #fef2f2; color: #991b1b; }
.cn-lquiz-result { margin: 6px 0 0; font-weight: 700; color: var(--cn-primary); }
.cn-lesson-discuss { margin-top: 26px; }
.cn-lesson-discuss h2 { font-size: 19px; margin: 0 0 6px; }

/* 视频水印 */
.cn-player { position: relative; }
.cn-player-mark { position: absolute; top: 10%; left: 8%; z-index: 5; pointer-events: none; user-select: none; font-size: 12px; color: rgba(255, 255, 255, .45); text-shadow: 0 0 4px rgba(0, 0, 0, .5); transition: top 2s ease, left 2s ease; }

/* 深色模式 */
body.cn-dark { --cn-bg: #0f1420; --cn-panel: #161d2d; --cn-soft: #1c2436; --cn-text: #e7ecf7; --cn-muted: #9aa7bf; --cn-border: #283349; --cn-accent-soft: rgba(245, 158, 11, .14); --cn-shadow: 0 20px 45px -30px rgba(0, 0, 0, .8); }
body.cn-dark .cn-header { background: rgba(15, 20, 32, .88); }
body.cn-dark .cn-hero { background: linear-gradient(128deg, #241c74 0%, #37309b 46%, #4c3fbb 100%); }
body.cn-dark .cn-card { box-shadow: none; border-color: var(--cn-border); }
body.cn-dark .cn-modal-mask { background: rgba(0, 0, 0, .7); }
body.cn-dark .cn-lquiz-opt.is-right { background: rgba(22, 163, 74, .15); color: #4ade80; }
body.cn-dark .cn-lquiz-opt.is-wrong { background: rgba(220, 38, 38, .15); color: #f87171; }
body.cn-dark .cn-sale-timer { background: rgba(185, 28, 28, .15); border-color: rgba(185, 28, 28, .4); color: #fca5a5; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }