/* 英语单词网 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; background: #f5f5f5; color: #333; font-size: 14px; line-height: 1.6; }
a { color: #0056b3; text-decoration: none; }
a:hover { color: #c00; }
img { border: 0; max-width: 100%; }

/* 顶部 */
.topbar { background: #e51c23; color: #fff; }
.topbar-inner { max-width: 1200px; margin: 0 auto; padding: 0 15px; display: flex; align-items: center; justify-content: space-between; height: 44px; }
.topbar a { color: #fff; margin-right: 10px; font-size: 13px; }
.topbar .menu a:hover { text-decoration: underline; }
.topbar .date { font-size: 12px; opacity: .9; }

/* 头部 */
.header { background: #fff; border-bottom: 3px solid #e51c23; }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 20px 15px; display: flex; align-items: center; flex-wrap: wrap; }
.logo { font-size: 30px; font-weight: bold; color: #e51c23; margin-right: 30px; }
.logo small { font-size: 12px; color: #999; font-weight: normal; display: block; }
.search-box { flex: 1; min-width: 280px; display: flex; max-width: 640px; }
.search-box input[type="text"] { flex: 1; height: 40px; border: 2px solid #e51c23; border-right: 0; padding: 0 15px; font-size: 15px; outline: none; border-radius: 3px 0 0 3px; }
.search-box button { height: 40px; background: #e51c23; color: #fff; border: 0; padding: 0 22px; font-size: 15px; cursor: pointer; border-radius: 0 3px 3px 0; }
.search-box button:hover { background: #c4121a; }

/* 导航 */
.nav { background: #333; }
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; overflow-x: auto; }
.nav-inner a { color: #fff; padding: 0 18px; line-height: 42px; display: block; white-space: nowrap; font-size: 14px; }
.nav-inner a:hover, .nav-inner a.active { background: #e51c23; }

/* 布局 */
.container { max-width: 1200px; margin: 15px auto; padding: 0 15px; display: flex; gap: 15px; flex-wrap: wrap; }
.main { flex: 1; min-width: 0; background: #fff; padding: 20px; border: 1px solid #e5e5e5; border-radius: 4px; }
.sidebar { width: 300px; flex-shrink: 0; }
@media (max-width: 900px) { .sidebar { width: 100%; } }

/* 侧栏模块 */
.side-box { background: #fff; border: 1px solid #e5e5e5; border-radius: 4px; margin-bottom: 15px; overflow: hidden; }
.side-box h3 { background: #f7f7f7; border-bottom: 1px solid #e5e5e5; font-size: 15px; padding: 10px 15px; color: #333; border-left: 4px solid #e51c23; }
.side-box .box-body { padding: 8px 10px; }
.side-box .box-body a { display: block; padding: 4px 6px; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.side-box .box-body a:hover { background: #f8f8f8; color: #c00; }
.side-box .box-body .times { float: right; color: #999; font-size: 11px; }

/* 面包屑 */
.crumb { padding: 8px 0; color: #999; font-size: 13px; }
.crumb a { color: #666; }

/* 单词详情 */
.word-title { font-size: 13px; color: #999; margin-bottom: 10px; }
.word-h1 { font-size: 34px; color: #222; margin-bottom: 10px; word-break: break-all; }
.pron-line { background: #f7f7f7; border-left: 4px solid #e51c23; padding: 12px 15px; margin-bottom: 15px; font-size: 15px; color: #555; }
.pron-line b { color: #333; }
.word-meaning { margin: 15px 0; }
.word-meaning h3 { font-size: 16px; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 10px; color: #e51c23; }
.word-meaning ul { list-style: none; }
.word-meaning ul li { padding: 5px 0; border-bottom: 1px dashed #eee; }
.word-meaning ul li:last-child { border-bottom: 0; }
.word-example { margin: 15px 0; }
.word-example h3 { font-size: 16px; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 10px; color: #e51c23; }
.word-example dl { padding: 8px 0; border-bottom: 1px dashed #eee; }
.word-example dt { color: #222; margin-bottom: 3px; }
.word-example dd { color: #555; }
.word-example p { color: #999; font-size: 12px; }
.word-source { color: #999; font-size: 13px; margin: 10px 0; }
.word-source h3 { font-size: 16px; color: #e51c23; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 10px; }

/* 相关单词 */
.related-words { margin-top: 20px; }
.related-words h3 { font-size: 16px; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 10px; color: #e51c23; }
.related-words ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.related-words li { width: 31%; }
@media (max-width: 900px) { .related-words li { width: 48%; } }
.related-words a { display: block; border: 1px solid #eee; padding: 6px 10px; text-align: center; border-radius: 3px; background: #fafafa; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.related-words a:hover { background: #fff; border-color: #e51c23; color: #e51c23; }

/* 单词列表 */
.word-list { list-style: none; }
.word-list li { border-bottom: 1px solid #f0f0f0; padding: 10px 5px; }
.word-list li a { font-size: 16px; }
.word-list li .info { color: #999; font-size: 12px; margin-left: 10px; }

/* 字母导航 */
.zimu-nav { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 15px; }
.zimu-nav a, .zimu-nav span { width: 38px; height: 38px; line-height: 38px; text-align: center; background: #f7f7f7; border: 1px solid #e5e5e5; border-radius: 4px; font-size: 16px; }
.zimu-nav a:hover { background: #e51c23; color: #fff; border-color: #e51c23; }
.zimu-nav span { background: #e51c23; color: #fff; border-color: #e51c23; }

/* 搜索提示 */
.search-tip { color: #999; margin-bottom: 10px; }
.search-tip b { color: #e51c23; }

/* 分页 */
.pagination { margin: 20px 0; text-align: center; display: flex; flex-wrap: wrap; justify-content: center; gap: 5px; }
.page-link { display: inline-block; min-width: 36px; padding: 6px 10px; border: 1px solid #ddd; background: #fff; border-radius: 3px; color: #333; }
.page-link:hover { background: #e51c23; color: #fff; border-color: #e51c23; }
.page-link.current { background: #e51c23; color: #fff; border-color: #e51c23; }
.page-link.disabled { color: #bbb; background: #f7f7f7; }
.page-info { display: inline-block; padding: 6px 10px; color: #999; }

/* 页脚 */
.footer { background: #333; color: #aaa; padding: 20px 0; margin-top: 20px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 15px; text-align: center; font-size: 13px; line-height: 2; }
.footer a { color: #ccc; }
.footer .beian { color: #888; }

/* 首页欢迎 */
.welcome { text-align: center; padding: 30px 20px; background: linear-gradient(135deg, #fdf6f6, #fff); border: 1px solid #f0e0e0; border-radius: 4px; margin-bottom: 20px; }
.welcome h2 { color: #e51c23; font-size: 26px; margin-bottom: 10px; }
.welcome p { color: #777; font-size: 14px; }

/* 首页分类入口 */
.home-cats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.home-cats a { display: block; background: #fafafa; border: 1px solid #eee; padding: 12px 10px; text-align: center; border-radius: 4px; font-size: 15px; }
.home-cats a:hover { background: #fff; border-color: #e51c23; color: #e51c23; }

/* 后台 */
.admin-body { background: #f0f2f5; }
.admin-wrap { max-width: 1200px; margin: 0 auto; padding: 20px 15px; }
.admin-header { background: #001529; color: #fff; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 54px; }
.admin-header a { color: #fff; margin-left: 15px; font-size: 13px; }
.admin-header .admin-logo { font-size: 18px; font-weight: bold; }
.login-wrap { max-width: 380px; margin: 100px auto; background: #fff; padding: 35px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,.1); }
.login-wrap h2 { text-align: center; margin-bottom: 25px; color: #e51c23; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; color: #555; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 9px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; outline: none; font-family: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: #e51c23; }
.btn { display: inline-block; padding: 9px 24px; border: 0; border-radius: 4px; font-size: 14px; cursor: pointer; background: #e51c23; color: #fff; }
.btn:hover { background: #c4121a; }
.btn-gray { background: #999; }
.btn-gray:hover { background: #777; }
.btn-green { background: #52c41a; }
.btn-green:hover { background: #3ba312; }
.btn-red { background: #ff4d4f; }
.btn-red:hover { background: #d9363e; }
.admin-table { width: 100%; background: #fff; border-collapse: collapse; font-size: 13px; }
.admin-table th { background: #fafafa; padding: 10px; border: 1px solid #eee; text-align: left; }
.admin-table td { padding: 10px; border: 1px solid #eee; }
.admin-table tr:hover td { background: #fafafa; }
.msg { padding: 10px 15px; border-radius: 4px; margin: 10px 0; }
.msg-success { background: #f6ffed; border: 1px solid #b7eb8f; color: #389e0d; }
.msg-error { background: #fff2f0; border: 1px solid #ffa39e; color: #cf1322; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 3px; font-size: 12px; }
.badge-good { background: #f6ffed; color: #52c41a; border: 1px solid #b7eb8f; }
.badge-no { background: #fff2f0; color: #ff4d4f; border: 1px solid #ffa39e; }
.admin-bar { background: #fff; padding: 15px; border-radius: 4px; margin-bottom: 15px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.admin-bar form { display: flex; gap: 8px; flex-wrap: wrap; }
.admin-bar input[type="text"] { padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; width: 260px; max-width: 100%; }
.modal-mask { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,.5); z-index: 999; align-items: center; justify-content: center; }
.modal-mask.show { display: flex; }
.modal { background: #fff; border-radius: 8px; padding: 25px; width: 420px; max-width: 90%; }
.modal h3 { margin-bottom: 15px; }
.modal .modal-btns { text-align: right; margin-top: 20px; }
.toolbar-actions a { margin-right: 8px; font-size: 13px; }

/* 朗读按钮 */
.speak-btn { margin-left: 15px; padding: 6px 16px; background: #e51c23; color: #fff; border: 0; border-radius: 4px; font-size: 14px; cursor: pointer; vertical-align: middle; }
.speak-btn:hover { background: #c4121a; }
.speak-mini { margin: 0 4px; padding: 3px 10px; background: #fff; color: #e51c23; border: 1px solid #e51c23; border-radius: 3px; font-size: 12px; cursor: pointer; }
.speak-mini:hover { background: #e51c23; color: #fff; }

/* 上一个 / 下一个单词 */
.prevnext { margin-top: 25px; padding-top: 15px; border-top: 1px solid #eee; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.pn-btn { flex: 1; min-width: 180px; padding: 12px 15px; border: 1px solid #ddd; border-radius: 4px; background: #fafafa; font-size: 14px; text-align: center; color: #333; display: block; }
.pn-btn:hover { border-color: #e51c23; color: #e51c23; background: #fff; }
.pn-btn.next { text-align: right; }
.pn-btn.prev { text-align: left; }
.pn-btn.disabled { color: #bbb; background: #f5f5f5; border-color: #eee; cursor: not-allowed; }
.pn-btn .pn-word { display: block; font-size: 16px; font-weight: bold; margin-top: 3px; }

/* 问答模块 */
.qa-ask-box { background: #fff; border: 1px solid #eee; border-radius: 4px; padding: 15px; margin-bottom: 15px; }
.qa-ask-row { margin-bottom: 10px; }
.qa-ask-row input[type="text"] { width: 100%; max-width: 560px; padding: 9px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; }
.qa-ask-row textarea { width: 100%; max-width: 560px; padding: 9px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; resize: vertical; }
.qa-answer-item { background: #fff; border: 1px solid #eee; border-radius: 4px; padding: 12px 15px; margin-bottom: 10px; }
.qa-answer-head { margin-bottom: 6px; font-size: 14px; }
.qa-answer-body { line-height: 1.7; font-size: 14px; color: #333; word-break: break-all; }
.qa-answer-form { background: #fff; border: 1px solid #eee; border-radius: 4px; padding: 15px; margin-top: 15px; }
.qa-answer-form input[type="text"] { width: 100%; max-width: 300px; padding: 9px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; margin-bottom: 10px; }
.qa-answer-form textarea { width: 100%; max-width: 560px; padding: 9px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; resize: vertical; margin-bottom: 10px; }