/* ChingTalk 外语资料分享网 - 全站样式 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #f59e0b;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --radius: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.7;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); font-size: 14px; }
.center { text-align: center; }
.highlight { color: var(--accent); }
.plus { color: #16a34a; font-weight: 600; }
.minus { color: var(--danger); font-weight: 600; }

/* ---------- 顶栏 ---------- */
.topbar { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.nav { display: flex; align-items: center; gap: 24px; height: 68px; }
.logo { font-size: 19px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 6px; }
.logo-img { height: 52px; width: auto; display: block; }

/* ---------- 富文本编辑器 / 资料正文 ---------- */
.editor-wrap { background: #fff; }
#editor { min-height: 300px; font-size: 15px; background: #fff; }
#editor.ql-container { border: 1px solid var(--border); border-radius: 0 0 8px 8px; font-family: inherit; font-size: 15px; }
.ql-toolbar.ql-snow { border: 1px solid var(--border); border-radius: 8px 8px 0 0; background: #fafafa; }
.ql-toolbar.ql-snow + .ql-container.ql-snow { border-top: 0; }
.ql-editor { min-height: 300px; line-height: 1.7; }
.ql-editor img { max-width: 100%; height: auto; border-radius: 6px; }
.ql-editor.ql-blank::before { font-style: normal; color: #9ca3af; }
.editor-status { font-size: 13px; margin-top: 6px; color: #6b7280; min-height: 18px; }
.editor-status.err { color: #dc2626; }
.editor-status.ok { color: #16a34a; }

/* 字体（Quill 类名） */
.ql-font-song { font-family: "SimSun", "宋体", serif; }
.ql-font-hei { font-family: "SimHei", "黑体", sans-serif; }
.ql-font-kai { font-family: "KaiTi", "楷体", serif; }
.ql-font-yahei { font-family: "Microsoft YaHei", "微软雅黑", sans-serif; }
.ql-font-serif { font-family: Georgia, "Times New Roman", serif; }
.ql-font-mono { font-family: Consolas, Monaco, monospace; }

/* Quill 下拉菜单中文化 */
.ql-snow .ql-picker.ql-header { width: 86px; }
.ql-snow .ql-picker.ql-size { width: 76px; }
.ql-snow .ql-picker.ql-font { width: 82px; }
.ql-snow .ql-picker.ql-header .ql-picker-label::before { content: "正文"; }
.ql-snow .ql-picker.ql-header .ql-picker-item::before { content: "正文"; }
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before { content: "标题 1"; }
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before { content: "标题 2"; }
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before { content: "标题 3"; }
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before { content: "标题 4"; }

.ql-snow .ql-picker.ql-size .ql-picker-label::before { content: "默认"; }
.ql-snow .ql-picker.ql-size .ql-picker-item::before { content: "默认"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="12px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="12px"]::before { content: "12 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="14px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="14px"]::before { content: "14 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="16px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="16px"]::before { content: "16 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="18px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="18px"]::before { content: "18 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="20px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="20px"]::before { content: "20 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="24px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="24px"]::before { content: "24 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="28px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="28px"]::before { content: "28 px"; }
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="32px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="32px"]::before { content: "32 px"; }

.ql-snow .ql-picker.ql-font .ql-picker-label::before { content: "字体"; }
.ql-snow .ql-picker.ql-font .ql-picker-item::before { content: "默认字体"; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="song"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="song"]::before { content: "宋体"; font-family: "SimSun", serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="hei"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="hei"]::before { content: "黑体"; font-family: "SimHei", sans-serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="kai"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="kai"]::before { content: "楷体"; font-family: "KaiTi", serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="yahei"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="yahei"]::before { content: "雅黑"; font-family: "Microsoft YaHei", sans-serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before { content: "Georgia"; font-family: Georgia, serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="mono"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="mono"]::before { content: "等宽"; font-family: Consolas, monospace; }


/* 资料详情正文展示 */
.rich-text { font-size: 15px; line-height: 1.8; color: var(--text); }
.rich-text p { margin: 0 0 12px; }
.rich-text h1, .rich-text h2, .rich-text h3, .rich-text h4 { margin: 18px 0 10px; line-height: 1.4; }
.rich-text h1 { font-size: 26px; }
.rich-text h2 { font-size: 22px; }
.rich-text h3 { font-size: 19px; }
.rich-text h4 { font-size: 17px; }
.rich-text img { max-width: 100%; height: auto; border-radius: 8px; display: block; margin: 14px 0; }
.rich-text blockquote { border-left: 4px solid var(--border); margin: 12px 0; padding: 6px 14px; color: #4b5563; background: #f9fafb; }
.rich-text pre { background: #f3f4f6; padding: 12px; border-radius: 8px; overflow: auto; }
.rich-text a { color: var(--primary); text-decoration: underline; }
.rich-text hr { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }
.rich-text .ql-align-center { text-align: center; }
.rich-text .ql-align-right { text-align: right; }
.rich-text .ql-align-justify { text-align: justify; }
.rich-text .ql-indent-1 { padding-left: 2em; }
.rich-text .ql-indent-2 { padding-left: 4em; }
.rich-text .ql-indent-3 { padding-left: 6em; }
.rich-text .ql-indent-4 { padding-left: 8em; }
.rich-text ol { list-style: none; padding-left: 1.6em; counter-reset: rich-list; margin: 0 0 12px; }
.rich-text ul { list-style: disc; padding-left: 1.8em; margin: 0 0 12px; }
.rich-text li[data-list] { position: relative; }
.rich-text li[data-list="ordered"] { counter-increment: rich-list; }
.rich-text li[data-list="ordered"]::before { content: counter(rich-list) "."; position: absolute; left: -1.5em; width: 1.2em; text-align: right; }
.rich-text li[data-list="bullet"]::before { content: "•"; position: absolute; left: -1em; }
.rich-text .ql-ui { display: none; }
@media (max-width: 640px) { .logo-img { height: 38px; } }
.logo:hover { text-decoration: none; }
.menu { display: flex; gap: 18px; flex: 1; }
.menu a { color: var(--text); font-size: 15px; }
.menu a:hover { color: var(--primary); text-decoration: none; }
.auth { display: flex; align-items: center; gap: 10px; }
.points-badge { background: #fef3c7; color: #b45309; padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.points-badge.vip { background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; }

.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; right: 0; top: 110%; background: #fff;
  border: 1px solid var(--border); border-radius: 10px; min-width: 140px;
  box-shadow: 0 8px 24px rgba(0,0,0,.1); overflow: hidden;
}
.dropdown-menu a { display: block; padding: 9px 16px; color: var(--text); font-size: 14px; }
.dropdown-menu a:hover { background: var(--bg); text-decoration: none; }
.dropdown:hover .dropdown-menu { display: block; }

/* ---------- 按钮 / 表单 ---------- */
.btn {
  display: inline-block; padding: 9px 20px; border-radius: 8px; border: none;
  font-size: 14px; cursor: pointer; font-weight: 600; transition: .15s;
}
.btn:hover { text-decoration: none; opacity: .92; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-ghost { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; background: #fff; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid #bfdbfe; border-color: var(--primary); }
label { display: block; margin-bottom: 14px; font-size: 14px; font-weight: 600; }
label input, label select, label textarea { margin-top: 6px; font-weight: 400; }
form.inline { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; }
form.inline select, form.inline input { width: auto; padding: 5px 8px; font-size: 13px; }

/* ---------- Flash ---------- */
.flash { padding: 12px 18px; border-radius: 10px; margin: 16px 0; font-size: 14px; }
.flash-success { background: #dcfce7; color: #166534; }
.flash-info    { background: #dbeafe; color: #1e40af; }
.flash-warning { background: #fef9c3; color: #854d0e; }
.flash-danger  { background: #fee2e2; color: #991b1b; }

/* ---------- 首页 Hero ---------- */
.hero {
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  color: #fff; text-align: center; padding: 56px 20px 44px; border-radius: 0 0 24px 24px; margin-bottom: 32px;
}
.hero h1 { font-size: 32px; margin-bottom: 10px; }
.hero p { opacity: .9; margin-bottom: 22px; }
.hero-search { display: flex; gap: 10px; max-width: 560px; margin: 0 auto 26px; }
.hero-search input { border-radius: 8px; border: none; }
.hero-stats { display: flex; justify-content: center; gap: 48px; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats b { font-size: 26px; }
.hero-stats span { opacity: .85; font-size: 13px; }

/* ---------- 卡片 ---------- */
.section-title { font-size: 20px; margin: 30px 0 16px; display: flex; justify-content: space-between; align-items: baseline; }
.section-title .more { font-size: 14px; font-weight: 400; }
.page-title { font-size: 26px; margin: 26px 0 18px; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.cat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; display: flex; flex-direction: column; transition: .15s;
}
.cat-card:hover { text-decoration: none; border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,99,235,.1); }
.cat-name { font-weight: 700; color: var(--text); }
.cat-count { font-size: 13px; color: var(--muted); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(255px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; color: var(--text); display: flex; flex-direction: column; gap: 8px; transition: .15s;
}
.card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: 0 12px 28px rgba(0,0,0,.08); border-color: var(--primary); }
.card h3 { font-size: 16px; line-height: 1.5; }
.card p { font-size: 13px; color: var(--muted); flex: 1; }
.card-tag { font-size: 12px; color: var(--primary); background: #eff6ff; align-self: flex-start; padding: 2px 10px; border-radius: 999px; }
.card-meta { display: flex; gap: 14px; font-size: 12px; color: var(--muted); }

.notice-box {
  background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius);
  padding: 16px 20px; margin: 28px 0; font-size: 14px;
}

/* ---------- 列表页 ---------- */
.filter-bar { display: flex; gap: 10px; margin: 14px 0; }
.filter-bar input[type=text] { max-width: 320px; }
.cat-chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.chip {
  padding: 6px 16px; border-radius: 999px; background: #fff; border: 1px solid var(--border);
  font-size: 13px; color: var(--text);
}
.chip:hover { text-decoration: none; border-color: var(--primary); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.empty { text-align: center; color: var(--muted); padding: 60px 0; }
.pager { display: flex; gap: 14px; align-items: center; justify-content: center; margin: 28px 0; }

/* ---------- 详情页 ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); margin: 18px 0; }
.detail-layout { display: grid; grid-template-columns: 1fr 300px; gap: 24px; }
.detail-main { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.detail-main h1 { font-size: 24px; margin-bottom: 12px; }
.detail-desc { margin: 18px 0; font-size: 15px; white-space: normal; }
.detail-side h3 { margin-bottom: 12px; }
.side-card {
  display: flex; flex-direction: column; gap: 4px; background: var(--card);
  border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-bottom: 10px; color: var(--text);
}
.side-card:hover { text-decoration: none; border-color: var(--primary); }
.download-box {
  background: #f0f7ff; border: 1px solid #bfdbfe; border-radius: var(--radius);
  padding: 22px; margin: 20px 0;
}
.download-box.locked { background: #fff7ed; border-color: #fed7aa; }
.download-box h3 { margin-bottom: 10px; }
.link-text { word-break: break-all; margin-bottom: 12px; }

/* ---------- 登录注册 / 表单面板 ---------- */
.auth-box {
  max-width: 420px; margin: 40px auto; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
}
.auth-box.wide { max-width: 720px; }
.auth-box h1 { font-size: 22px; margin-bottom: 18px; text-align: center; }

/* ---------- 个人中心 ---------- */
.profile-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.big-number { font-size: 42px; font-weight: 800; color: var(--primary); }
.progress { height: 10px; background: var(--border); border-radius: 999px; overflow: hidden; margin: 10px 0; }
.progress-bar { height: 100%; background: linear-gradient(90deg, var(--primary), #7c3aed); border-radius: 999px; }
.list { list-style: none; }
.list li { padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.list li:last-child { border: none; }

.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; margin-bottom: 24px; }
.table th, .table td { padding: 11px 14px; border-bottom: 1px solid var(--border); font-size: 14px; text-align: left; }
.table th { background: #f9fafb; font-size: 13px; color: var(--muted); }
.table tr:last-child td { border-bottom: none; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.link-cell { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 12px; }

/* ---------- 积分购买 ---------- */
.pkg-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 24px 0; }
.pkg-card {
  background: var(--card); border: 2px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; position: relative;
}
.pkg-card.hot { border-color: var(--accent); }
.pkg-ribbon {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; font-size: 12px; padding: 3px 14px; border-radius: 999px;
}
.pkg-price { font-size: 16px; color: var(--primary); margin: 10px 0; }
.pkg-price b { font-size: 38px; }
.pay-area { display: flex; gap: 24px; align-items: flex-start; margin-top: 14px; flex-wrap: wrap; }
.pay-qr { width: 190px; height: 190px; border: 1px solid var(--border); border-radius: 10px; background: #fff; }

/* ---------- 后台 ---------- */
.admin-tabs { display: flex; gap: 8px; margin: 18px 0; flex-wrap: wrap; }
.admin-tabs a {
  padding: 9px 18px; border-radius: 8px; background: #fff; border: 1px solid var(--border);
  color: var(--text); font-size: 14px;
}
.admin-tabs a:hover { text-decoration: none; }
.admin-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.badge { background: var(--danger); color: #fff; font-size: 11px; border-radius: 999px; padding: 1px 7px; margin-left: 4px; }

/* ---------- 评论区 ---------- */
.comments { margin-top: 32px; border-top: 1px solid var(--border); padding-top: 20px; }
.comment-form textarea { margin-bottom: 10px; resize: vertical; }
.comment-item {
  display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px dashed var(--border);
}
.comment-item:last-child { border-bottom: none; }
.comment-avatar {
  width: 38px; height: 38px; flex-shrink: 0; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.comment-body { flex: 1; }
.comment-meta { display: flex; gap: 12px; align-items: baseline; margin-bottom: 4px; }
.comment-body p { font-size: 14px; white-space: normal; }

.invite-box { margin-top: 12px; padding: 12px; background: var(--bg); border-radius: 10px; }
.invite-link { word-break: break-all; font-size: 12px; color: var(--primary); margin-top: 4px; }

.report-box { margin-top: 12px; border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; }
.report-box summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.report-box form { display: flex; gap: 8px; margin-top: 10px; }
.hot-words { margin-top: 14px; font-size: 13px; opacity: .9; }
.hot-words a { color: #fff; opacity: .85; margin: 0 6px; border-bottom: 1px dashed rgba(255,255,255,.5); }
.hot-words a:hover { opacity: 1; text-decoration: none; }

.points-badge.alert { background: var(--danger); color: #fff; }
.captcha-row { display: flex; gap: 8px; align-items: center; }
.captcha-row input { flex: 1; }
.captcha-img { width: 120px; height: 40px; cursor: pointer; border-radius: 6px; border: 1px solid var(--border); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; align-items: center; }
.action-row { display: flex; gap: 12px; margin: 16px 0; flex-wrap: wrap; }
.article-list { display: flex; flex-direction: column; gap: 12px; }
.article-item {
  display: flex; justify-content: space-between; align-items: center; gap: 18px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; color: var(--text);
}
.article-item:hover { text-decoration: none; border-color: var(--primary); }
.article-item h3 { font-size: 16px; margin-bottom: 6px; }
.article-item p { font-size: 13px; color: var(--muted); }
.article-content { font-size: 15px; margin: 18px 0; line-height: 2; }

/* ---------- 任务中心 ---------- */
.task-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; margin: 20px 0; }
.task-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
  display: flex; flex-direction: column; gap: 14px;
}
.task-card.featured { border: 2px solid #07c160; }
.task-head { display: flex; gap: 12px; align-items: center; }
.task-icon {
  width: 46px; height: 46px; flex-shrink: 0; border-radius: 12px; background: var(--bg);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.task-body { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.task-steps { display: flex; gap: 16px; align-items: flex-start; }
.task-steps ol { margin-left: 18px; font-size: 13px; color: var(--muted); }
.task-steps li { margin: 4px 0; }
.task-qr { width: 130px; height: 150px; border: 1px solid var(--border); border-radius: 8px; background: #fff; flex-shrink: 0; }

/* ---------- 微信登录 ---------- */
.btn-wechat { background: #07c160; color: #fff; }
.btn-wechat:hover { opacity: .92; }
.divider { text-align: center; color: var(--muted); font-size: 13px; margin: 18px 0; }

/* ---------- 文章页 ---------- */
.article { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.article h2 { font-size: 18px; margin: 22px 0 10px; }

/* ---------- 页脚 ---------- */
.footer { background: #111827; color: #d1d5db; margin-top: 56px; padding: 40px 0 22px; font-size: 14px; }
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1.4fr; gap: 32px; margin-bottom: 24px; }
.footer h4 { color: #fff; margin-bottom: 10px; }
.footer a { color: #9ca3af; display: block; padding: 3px 0; }
.footer a:hover { color: #fff; }
.disclaimer {
  border-top: 1px solid #374151; padding: 18px 0; color: #9ca3af; font-size: 13px; line-height: 1.9;
}
.copyright { border-top: 1px solid #374151; padding-top: 16px; font-size: 12px; color: #6b7280; text-align: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .nav { flex-wrap: wrap; height: auto; padding: 10px 0; gap: 10px; }
  .menu { order: 3; width: 100%; overflow-x: auto; }
  .detail-layout, .two-col, .footer-cols { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .hero-stats { gap: 24px; }
}