/*
Theme Name: QuizBank
Theme URI: https://www.zhiliaowp.com/themes/quizbank/
Author: 知了主题
Author URI: https://www.zhiliaowp.com/
Description: QuizBank（知了题库）是一款刷题 / 题库 WordPress 主题：单选 / 多选 / 判断 / 简答题型，按科目章节练习、限时模拟考、即时判分与解析、错题本；按科目付费或会员解锁，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: 1.5.0
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: quizbank
Tags: education, custom-logo, custom-menu, translation-ready, threaded-comments
*/

:root {
	--qb-primary: #0d9488;
	--qb-ink: #0c2b28;
	--qb-ink-2: #10403b;
	--qb-lime: #a7f3d0;
	--qb-bg: #f3f7f6;
	--qb-panel: #ffffff;
	--qb-soft: #e9f1ef;
	--qb-text: #10201d;
	--qb-muted: #5b6b68;
	--qb-border: #dde8e5;
	--qb-ok: #10b981;
	--qb-no: #ef4444;
	--qb-radius: 12px;
	--qb-shadow: 0 18px 40px -26px rgba(12, 43, 40, .5);
	--qb-container: 1120px;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--qb-bg); color: var(--qb-text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 15px; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; }

.qb-container { width: min(var(--qb-container), calc(100% - 40px)); margin: 0 auto; }
.qb-main { padding: 34px 0 60px; }
.qb-skip { position: absolute; left: -9999px; }
.qb-skip:focus { left: 16px; top: 16px; z-index: 999; background: #fff; padding: 8px 14px; border-radius: 8px; }

.qb-btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 10px 18px; border-radius: 9px; background: var(--qb-primary); color: #fff; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease; }
.qb-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 24px -14px var(--qb-primary); }
.qb-btn:disabled { opacity: .6; cursor: default; transform: none; }
.qb-btn-ghost { background: var(--qb-panel); color: var(--qb-text); border-color: var(--qb-border); }
.qb-btn-lg { padding: 13px 24px; font-size: 16px; }
.qb-btn-block { width: 100%; }
.qb-icon { flex: none; vertical-align: middle; }

/* 头部（工具风：深墨绿实底 + 白字导航） */
.qb-header { position: sticky; top: 0; z-index: 100; background: var(--qb-ink); border-bottom: 1px solid rgba(255, 255, 255, .08); }
.qb-header-inner { display: flex; align-items: center; gap: 20px; height: 62px; }
.qb-brand img, .qb-brand .custom-logo { max-height: 38px; width: auto; }
.qb-brand-text { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: #fff; }
.qb-brand-mark { width: 34px; height: 34px; border-radius: 9px; display: block; }
.qb-nav ul { list-style: none; display: flex; gap: 2px; margin: 0; padding: 0; }
.qb-nav a { display: inline-flex; padding: 8px 13px; border-radius: 8px; color: rgba(255, 255, 255, .72); font-weight: 600; }
.qb-nav a:hover, .qb-nav .current-menu-item > a { color: #fff; background: rgba(255, 255, 255, .1); }
.qb-header-actions { margin-left: auto; }
.qb-header-actions .qb-btn-ghost { background: rgba(255, 255, 255, .08); color: #fff; border-color: rgba(255, 255, 255, .18); }
.qb-header-actions .qb-btn { background: var(--qb-primary); }
.qb-menu-toggle { display: none; flex-direction: column; gap: 4px; width: 40px; height: 40px; align-items: center; justify-content: center; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .2); border-radius: 10px; cursor: pointer; }
.qb-menu-toggle span { width: 18px; height: 2px; background: #fff; border-radius: 2px; }

/* Hero（与页头连成深色区块 + 网格纹理 + 数字统计） */
.qb-hero { position: relative; padding: 66px 0 72px; background: linear-gradient(160deg, var(--qb-ink) 0%, var(--qb-ink-2) 58%, #14554d 100%); color: #fff; overflow: hidden; }
.qb-hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px); background-size: 34px 34px; mask-image: radial-gradient(700px 380px at 75% 20%, #000, transparent); }
.qb-hero > .qb-container { position: relative; z-index: 1; }
.qb-hero-badge { display: inline-block; padding: 6px 14px; border-radius: 8px; background: rgba(167, 243, 208, .14); color: var(--qb-lime); font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }
.qb-hero h1 { font-size: clamp(28px, 4vw, 44px); margin: 18px 0 14px; letter-spacing: -.5px; color: #fff; }
.qb-hero-sub { max-width: 620px; color: rgba(255, 255, 255, .78); font-size: 17px; margin: 0 0 26px; }
.qb-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.qb-hero-actions .qb-btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .4); }
.qb-hero-stats { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.qb-hero-stats > div { padding: 12px 20px; border: 1px solid rgba(255, 255, 255, .16); border-radius: 12px; background: rgba(255, 255, 255, .05); }
.qb-hero-stats b { display: block; font-size: 24px; font-variant-numeric: tabular-nums; color: var(--qb-lime); }
.qb-hero-stats span { color: rgba(255, 255, 255, .66); font-size: 13px; }

.qb-section { padding: 52px 0; }
.qb-section-alt { background: var(--qb-panel); border-block: 1px solid var(--qb-border); }
.qb-section-head { display: flex; align-items: center; gap: 10px; margin-bottom: 26px; }
.qb-section-head h2 { font-size: 24px; margin: 0; }
.qb-section-head h2::after { content: ""; display: inline-block; width: 34px; height: 6px; margin-left: 12px; border-radius: 4px; background: linear-gradient(90deg, var(--qb-primary), transparent); vertical-align: middle; }

/* 科目卡片网格（彩色顶带 + 序号色循环） */
.qb-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.qb-subject-card { position: relative; background: var(--qb-panel); border: 1px solid var(--qb-border); border-top: 0; border-radius: var(--qb-radius); padding: 24px 20px 20px; display: flex; flex-direction: column; gap: 6px; overflow: hidden; transition: transform .16s ease, box-shadow .16s ease; }
.qb-subject-card::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 5px; background: var(--qb-primary); }
.qb-grid > .qb-subject-card:nth-child(6n+2)::before { background: #6366f1; }
.qb-grid > .qb-subject-card:nth-child(6n+3)::before { background: #f59e0b; }
.qb-grid > .qb-subject-card:nth-child(6n+4)::before { background: #ec4899; }
.qb-grid > .qb-subject-card:nth-child(6n+5)::before { background: #8b5cf6; }
.qb-grid > .qb-subject-card:nth-child(6n)::before { background: #0ea5e9; }
.qb-subject-card:hover { transform: translateY(-4px); box-shadow: var(--qb-shadow); }
.qb-subject-icon { display: inline-flex; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 11px; background: color-mix(in srgb, var(--qb-primary) 12%, var(--qb-panel)); color: var(--qb-primary); margin-bottom: 6px; }
.qb-subject-card h3 { margin: 0; font-size: 17px; }
.qb-subject-card p { margin: 0; color: var(--qb-muted); font-size: 13px; }
.qb-subject-price { margin-top: 6px; font-weight: 800; color: var(--qb-primary); font-variant-numeric: tabular-nums; }

/* 特性 */
.qb-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.qb-feature { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 24px; }
.qb-feature-icon { display: inline-flex; padding: 11px; border-radius: 12px; background: color-mix(in srgb, var(--qb-primary) 12%, var(--qb-panel)); color: var(--qb-primary); }
.qb-feature h3 { margin: 14px 0 8px; font-size: 18px; }
.qb-feature p { margin: 0; color: var(--qb-muted); }

/* 会员 */
.qb-plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.qb-plan { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 26px; text-align: center; }
.qb-plan h3 { margin: 0 0 6px; }
.qb-plan-price { font-size: 32px; font-weight: 800; color: var(--qb-primary); }
.qb-plan p { color: var(--qb-muted); margin: 4px 0 18px; }

/* 科目页 */
.qb-subject-hero { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 28px; margin-bottom: 24px; }
.qb-subject-hero h1 { margin: 0 0 8px; font-size: 28px; }
.qb-subject-desc { color: var(--qb-muted); margin: 0 0 12px; }
.qb-subject-facts { display: flex; gap: 18px; color: var(--qb-muted); font-size: 14px; }
.qb-subject-facts span { display: inline-flex; align-items: center; gap: 5px; }
.qb-subject-unlock { margin-top: 16px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.qb-vip-hint { display: inline-flex; align-items: center; gap: 6px; color: #b45309; background: #fffbeb; padding: 6px 12px; border-radius: 9px; margin: 0; font-size: 13px; }
.qb-subject-note { color: var(--qb-muted); font-size: 13px; }

/* 练习入口 */
.qb-quiz-launch { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.qb-launch-btn { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; text-align: left; background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 22px; cursor: pointer; transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease; }
.qb-launch-btn:hover { transform: translateY(-2px); box-shadow: var(--qb-shadow); border-color: var(--qb-primary); }
.qb-launch-btn .qb-icon { color: var(--qb-primary); }
.qb-launch-btn strong { font-size: 17px; margin-top: 6px; }
.qb-launch-btn span { color: var(--qb-muted); font-size: 13px; }

/* 答题台 */
.qb-quiz-stage { margin-top: 22px; }
.qb-loading, .qb-empty { padding: 40px; text-align: center; color: var(--qb-muted); background: var(--qb-panel); border: 1px dashed var(--qb-border); border-radius: var(--qb-radius); }
.qb-quiz-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.qb-timer { font-weight: 800; color: var(--qb-primary); font-variant-numeric: tabular-nums; }
.qb-qcard { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 24px; }
.qb-qcard-head { display: flex; justify-content: space-between; color: var(--qb-muted); font-size: 13px; margin-bottom: 10px; }
.qb-qcard-type { background: var(--qb-soft); padding: 2px 10px; border-radius: 999px; color: var(--qb-primary); font-weight: 650; }
.qb-qcard-stem { font-size: 17px; font-weight: 650; line-height: 1.6; }
.qb-qcard-material { color: var(--qb-muted); margin-top: 8px; }
.qb-opts { margin-top: 16px; display: grid; gap: 10px; }
.qb-opt { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--qb-border); border-radius: 11px; cursor: pointer; transition: border-color .12s ease, background .12s ease; }
.qb-opt:hover { border-color: var(--qb-primary); background: var(--qb-soft); }
.qb-opt input { accent-color: var(--qb-primary); width: 18px; height: 18px; }
.qb-opt-letter { display: inline-flex; width: 26px; height: 26px; align-items: center; justify-content: center; border-radius: 8px; background: var(--qb-soft); font-weight: 700; }
.qb-essay { width: 100%; border: 1px solid var(--qb-border); border-radius: 11px; padding: 12px; }
.qb-qcard-actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.qb-qcard-actions .qb-btn:nth-child(2) { margin-left: auto; }

/* 判分反馈 */
.qb-feedback { margin-top: 18px; border-top: 1px dashed var(--qb-border); padding-top: 16px; }
.qb-fb-badge { display: inline-block; padding: 4px 12px; border-radius: 999px; font-weight: 700; font-size: 13px; }
.qb-fb-ok { background: color-mix(in srgb, var(--qb-ok) 14%, #fff); color: var(--qb-ok); }
.qb-fb-no { background: color-mix(in srgb, var(--qb-no) 12%, #fff); color: var(--qb-no); }
.qb-fb-info { background: var(--qb-soft); color: var(--qb-primary); }
.qb-fb-answer { margin: 10px 0 6px; font-weight: 650; }
.qb-fb-explain, .qb-fb-ref { color: var(--qb-muted); background: var(--qb-soft); border-radius: 10px; padding: 12px 14px; margin-top: 8px; }

/* 模考结果 */
.qb-result-head { text-align: center; background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 30px; margin-bottom: 20px; }
.qb-result-score { font-size: 46px; font-weight: 800; color: var(--qb-primary); }
.qb-result-sub { color: var(--qb-muted); margin: 4px 0 16px; }
.qb-review-item { background: var(--qb-panel); border: 1px solid var(--qb-border); border-left-width: 4px; border-radius: 10px; padding: 16px 18px; margin-bottom: 12px; }
.qb-review-item.is-ok { border-left-color: var(--qb-ok); }
.qb-review-item.is-no { border-left-color: var(--qb-no); }
.qb-review-stem { font-weight: 650; }
.qb-review-line { color: var(--qb-muted); margin: 8px 0 0; }
.qb-review-explain { color: var(--qb-muted); margin-top: 6px; font-size: 14px; }

/* 单题页 */
.qb-single-q { max-width: 780px; }
.qb-q-crumb a { display: inline-flex; align-items: center; gap: 5px; color: var(--qb-muted); font-size: 14px; }
.qb-q-card { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 26px; margin-top: 12px; }
.qb-q-type { display: inline-block; background: var(--qb-soft); color: var(--qb-primary); font-weight: 650; font-size: 13px; padding: 2px 10px; border-radius: 999px; }
.qb-q-stem { font-size: 22px; margin: 12px 0; }
.qb-q-options { list-style: none; margin: 16px 0; padding: 0; display: grid; gap: 10px; }
.qb-q-options li { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--qb-border); border-radius: 11px; }
.qb-opt-letter { flex: none; }
.qb-q-answer { margin-top: 12px; }
.qb-q-answer-body { margin-top: 14px; }
.qb-q-correct { font-weight: 650; }
.qb-q-explain { color: var(--qb-muted); background: var(--qb-soft); border-radius: 10px; padding: 12px 14px; margin-top: 8px; }
.qb-q-locked { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--qb-muted); background: var(--qb-soft); border-radius: 11px; padding: 16px; margin-top: 14px; }
.qb-q-locked .qb-btn { margin-left: auto; }

/* 文章 / 列表 */
.qb-single { max-width: 800px; }
.qb-single-title { font-size: 30px; margin: 0 0 10px; }
.qb-article-content { font-size: 16px; }
.qb-post-list { display: grid; gap: 16px; }
.qb-post-item { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 20px; }
.qb-post-item h2 { margin: 0 0 6px; font-size: 20px; }
.qb-post-meta { color: var(--qb-muted); font-size: 13px; }
.qb-archive-head h1 { font-size: 28px; margin: 0 0 18px; }
.qb-pagination { display: flex; gap: 8px; justify-content: center; margin-top: 30px; flex-wrap: wrap; }
.qb-pagination .page-numbers { padding: 8px 14px; border-radius: 9px; border: 1px solid var(--qb-border); background: var(--qb-panel); color: var(--qb-muted); }
.qb-pagination .current { background: var(--qb-primary); color: #fff; border-color: var(--qb-primary); }

/* 弹窗 */
.qb-modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.qb-modal[hidden] { display: none; }
.qb-modal-mask { position: absolute; inset: 0; background: rgba(8, 20, 20, .55); }
.qb-modal-panel { position: relative; background: var(--qb-panel); border-radius: 16px; padding: 26px; width: min(360px, calc(100% - 32px)); text-align: center; box-shadow: var(--qb-shadow); }
.qb-modal-close { position: absolute; right: 12px; top: 10px; border: 0; background: none; font-size: 24px; cursor: pointer; color: var(--qb-muted); }
.qb-modal-qr { display: flex; justify-content: center; margin: 14px 0; min-height: 200px; }
.qb-modal-qr img { width: 200px; height: 200px; }
.qb-modal-tip { color: var(--qb-muted); font-size: 13px; }

/* 页脚 */
.qb-footer { background: var(--qb-panel); border-top: 1px solid var(--qb-border); padding: 26px 0; margin-top: 40px; }
.qb-footer-inner { color: var(--qb-muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.qb-credit a { color: var(--qb-primary); }

/* 用户中心 */
.qb-block { margin-bottom: 30px; }
.qb-block h2 { font-size: 21px; margin: 0 0 16px; }
.qb-account-head { margin-bottom: 24px; }
.qb-account-head h1 { font-size: 26px; margin: 0 0 8px; }
.qb-account-member { display: inline-flex; align-items: center; gap: 6px; color: var(--qb-muted); background: var(--qb-panel); border: 1px solid var(--qb-border); padding: 6px 14px; border-radius: 999px; }
.qb-account-member a { color: var(--qb-primary); font-weight: 650; margin-left: 6px; }
.qb-quiz-launch-one { grid-template-columns: 1fr; max-width: 520px; }
.qb-orders-wrap { overflow-x: auto; border: 1px solid var(--qb-border); border-radius: var(--qb-radius); background: var(--qb-panel); }
.qb-orders { width: 100%; min-width: 640px; border-collapse: collapse; }
.qb-orders th, .qb-orders td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--qb-border); font-size: 14px; }
.qb-orders th { background: var(--qb-soft); color: var(--qb-muted); }
.qb-orders tr:last-child td { border-bottom: 0; }

/* 排行榜 / 每日一练 */
.qb-leaderboard { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 20px 22px; margin-top: 24px; }
.qb-leaderboard h3 { margin: 0 0 12px; font-size: 18px; }
.qb-lb-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.qb-lb-list li { display: flex; align-items: center; gap: 12px; padding: 8px 10px; border-radius: 9px; }
.qb-lb-list li:nth-child(odd) { background: var(--qb-soft); }
.qb-lb-rank { width: 26px; height: 26px; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px; background: var(--qb-border); color: var(--qb-muted); font-weight: 800; font-size: 13px; }
.qb-lb-rank-1 { background: #f59e0b; color: #fff; }
.qb-lb-rank-2 { background: #9aa7bd; color: #fff; }
.qb-lb-rank-3 { background: #cd7f32; color: #fff; }
.qb-lb-name { flex: 1; }
.qb-lb-score { font-weight: 700; color: var(--qb-primary); }
.qb-daily-streak { display: inline-block; margin-top: 12px; padding: 6px 14px; border-radius: 999px; background: color-mix(in srgb, var(--qb-primary) 12%, var(--qb-panel)); color: var(--qb-primary); font-weight: 700; }

.qb-block-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.qb-block-head h2 { margin: 0; }

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

/* 细节补齐：滚动锁 / 工具条分组 / 单题材料 / 杂项 */
body.qb-modal-open { overflow: hidden; }
.qb-quiz-left, .qb-quiz-right { display: flex; align-items: center; gap: 10px; }
.qb-qcard-no { color: var(--qb-muted); font-size: 13px; }
.qb-review { display: grid; gap: 12px; margin-top: 16px; }
.qb-q-material { margin: 0 0 16px; padding: 12px 16px; background: var(--qb-soft); border: 1px solid var(--qb-border); border-radius: 10px; line-height: 1.8; }
.qb-q-material img { max-width: 100%; height: auto; border-radius: 8px; }
.qb-single-thumb { margin: 0 0 18px; }
.qb-single-thumb img { width: 100%; height: auto; border-radius: 12px; display: block; }
.qb-modal-product { color: var(--qb-muted); }
.qb-modal-product b { color: var(--qb-primary); font-size: 18px; }
.qb-no-comments { color: var(--qb-muted); font-size: 14px; }
.qb-search-toggle { padding: 9px 12px; }
.comment-navigation { display: flex; justify-content: space-between; margin: 14px 0; font-size: 14px; }

/* 题目纠错 / 成绩 */
.qb-report { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--qb-border); }
.qb-report-toggle { display: inline-flex; align-items: center; gap: 6px; background: none; border: 0; color: var(--qb-muted); font-size: 13px; cursor: pointer; padding: 0; }
.qb-report-toggle:hover { color: var(--qb-primary); }
.qb-report-form { margin-top: 12px; display: grid; gap: 10px; }
.qb-report-form textarea { width: 100%; box-sizing: border-box; padding: 10px 12px; border: 1px solid var(--qb-border); border-radius: 10px; font-size: 14px; background: var(--qb-bg); color: var(--qb-text); resize: vertical; }
.qb-report-actions { display: flex; align-items: center; gap: 12px; }
.qb-report-result { font-size: 13px; color: var(--qb-muted); }
.qb-score-pass { color: #16a34a; }
.qb-score-fail { color: #dc2626; }

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

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

/* 评论区 */
.qb-comments { margin-top: 10px; }
.qb-comments-title, .comment-reply-title { font-size: 18px; margin: 0 0 16px; }
.qb-commentlist, .qb-commentlist .children { list-style: none; margin: 0; padding: 0; }
.qb-commentlist .children { margin-left: 44px; }
.qb-commentlist .comment, .qb-commentlist .pingback { padding: 14px 0; border-bottom: 1px solid var(--qb-border); }
.qb-commentlist .comment-body { display: grid; gap: 6px; }
.qb-commentlist .comment-author { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.qb-commentlist .comment-author .avatar { border-radius: 50%; }
.qb-commentlist .comment-author .says { display: none; }
.qb-commentlist .comment-metadata { font-size: 12px; }
.qb-commentlist .comment-metadata a { color: var(--qb-muted); }
.qb-commentlist .comment-content { font-size: 15px; line-height: 1.75; }
.qb-commentlist .comment-content p { margin: 0 0 8px; }
.qb-commentlist .reply { font-size: 13px; }
.qb-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(--qb-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(--qb-border); border-radius: 10px; font-size: 15px; background: var(--qb-bg); color: var(--qb-text); box-sizing: border-box; }
.comment-respond textarea { min-height: 120px; resize: vertical; }
.comment-reply-title small { margin-left: 10px; font-size: 13px; }

/* 响应式 */
@media (max-width: 1024px) { .qb-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 820px) {
	.qb-nav { display: none; position: absolute; left: 20px; right: 20px; top: 62px; background: var(--qb-ink-2); border: 1px solid rgba(255, 255, 255, .12); border-radius: 12px; padding: 10px; box-shadow: var(--qb-shadow); }
	body.qb-menu-open .qb-nav { display: block; }
	.qb-nav ul { flex-direction: column; }
	.qb-menu-toggle { display: flex; }
	.qb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.qb-feature-grid, .qb-plan-grid, .qb-quiz-launch { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
	.qb-grid { grid-template-columns: 1fr; }
	.qb-header-actions .qb-btn span { display: none; }
}
/* 钱包 / 卡密 / 推广 */
.qb-wallet-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.qb-wallet-box { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 20px 22px; }
.qb-wallet-box h3 { margin: 0 0 10px; font-size: 16px; }
.qb-wallet-sub { margin-top: 18px; }
.qb-wallet-balance { font-size: 30px; font-weight: 800; color: var(--qb-primary); margin: 0 0 14px; }
.qb-wallet-tip { color: var(--qb-muted); font-size: 13px; margin: 0 0 10px; }
.qb-redeem-form { display: flex; gap: 8px; flex-wrap: wrap; }
.qb-redeem-form input { flex: 1; min-width: 140px; padding: 10px 12px; border: 1px solid var(--qb-border); border-radius: 10px; font-size: 14px; background: var(--qb-bg); color: var(--qb-text); }
.qb-wallet-msg { min-height: 1.2em; font-size: 13px; color: var(--qb-primary); margin: 8px 0 0; }
.qb-wallet-log { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 6px; font-size: 13px; }
.qb-wallet-log li { display: flex; justify-content: space-between; gap: 10px; padding: 6px 10px; border-radius: 8px; background: var(--qb-soft); }
.qb-wallet-log .is-in { color: #16a34a; }
.qb-wallet-log .is-out { color: #dc2626; }

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

/* 收藏 / 笔记 */
.qb-q-tools { margin-top: 16px; }
.qb-fav-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--qb-border); background: var(--qb-bg); border-radius: 999px; cursor: pointer; font-size: 13px; color: var(--qb-muted); }
.qb-fav-btn:hover { border-color: #f43f5e; color: #f43f5e; }
.qb-fav-btn.is-on { border-color: #f43f5e; color: #f43f5e; background: rgba(244, 63, 94, .08); }
.qb-note { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--qb-border); }
.qb-note h3 { margin: 0 0 8px; font-size: 15px; }
.qb-note textarea { width: 100%; box-sizing: border-box; padding: 10px 12px; border: 1px solid var(--qb-border); border-radius: 10px; font-size: 14px; background: var(--qb-bg); color: var(--qb-text); resize: vertical; margin-bottom: 8px; }

/* 做题报告 */
.qb-report-summary { background: var(--qb-panel); border: 1px solid var(--qb-border); border-radius: var(--qb-radius); padding: 16px 20px; margin-top: 16px; }
.qb-report-summary h4 { margin: 0 0 12px; font-size: 15px; }
.qb-rep-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 13px; }
.qb-rep-label { flex: 0 0 140px; color: var(--qb-muted); }
.qb-rep-bar { flex: 1; height: 8px; background: var(--qb-soft); border-radius: 999px; overflow: hidden; }
.qb-rep-bar i { display: block; height: 100%; background: #16a34a; border-radius: 999px; }
.qb-rep-bar i.is-weak { background: #f59e0b; }
.qb-rep-row b { width: 42px; text-align: right; }
.qb-rep-tip { margin: 10px 0 0; font-size: 13px; color: #b45309; }
.qb-feedback.is-recite { border-left: 3px solid var(--qb-primary); }

/* 深色模式 */
body.qb-dark { --qb-bg: #0d1615; --qb-panel: #13201e; --qb-soft: #1a2b28; --qb-text: #e4efec; --qb-muted: #93a8a3; --qb-border: #24403b; --qb-shadow: 0 20px 45px -30px rgba(0, 0, 0, .8); }
body.qb-dark .qb-header { background: #081513; }
body.qb-dark .qb-modal-mask { background: rgba(0, 0, 0, .7); }

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