:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #EEF2FF;
    --bg: #f5f7fa;
    --card: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border: #e2e8f0;
    --danger: #e53e3e;
    --success: #38a169;
    --warning: #d69e2e;
    --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.6; font-size: 14px; min-height: 100vh;
    display: flex; flex-direction: column;
}
a { text-decoration: none; color: inherit; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* 导航 */
.navbar { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 800; font-size: 1.2rem; color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 16px; }
.nav-links a:not(.btn) { color: var(--text-secondary); font-weight: 500; }
.nav-links a.active { color: var(--primary); }
.nav-user { color: var(--text-muted); font-size: 0.85rem; }

.content { flex: 1; padding-top: 24px; padding-bottom: 40px; }
.footer { border-top: 1px solid var(--border); padding: 20px 0; text-align: center; color: var(--text-muted); font-size: 0.8rem; }

/* 卡片 */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.hero { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: var(--radius); padding: 40px; margin-bottom: 20px; }
.hero h1 { font-size: 1.6rem; margin-bottom: 8px; }
.hero p { opacity: 0.9; }

/* 表格 */
.table-wrap { width: 100%; }
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
table th { background: var(--bg); color: var(--text-secondary); font-weight: 600; white-space: nowrap; }
table tbody tr:hover { background: #fafbfc; }
.table-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: 5px; padding: 8px 16px; border-radius: 6px; border: 1px solid transparent; cursor: pointer; font-size: 0.85rem; font-weight: 600; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border-color: var(--border); color: var(--text-secondary); background: #fff; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 0.8rem; }

/* 徽章 */
.badge { padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; display: inline-block; }
.badge-warning { background: rgba(212,168,83,0.12); color: #b8923a; border: 1px solid rgba(212,168,83,0.25); }
.badge-success { background: rgba(56,161,105,0.12); color: #38a169; border: 1px solid rgba(56,161,105,0.25); }
.badge-muted { background: rgba(110,118,129,0.12); color: #6e7681; border: 1px solid rgba(110,118,129,0.2); }
.badge-danger { background: rgba(229,62,62,0.12); color: #e53e3e; border: 1px solid rgba(229,62,62,0.25); }
.badge-info { background: rgba(79,70,229,0.12); color: #4F46E5; border: 1px solid rgba(79,70,229,0.25); }

/* 表单 */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.83rem; font-weight: 600; margin-bottom: 6px; }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem; outline: none; font-family: inherit; transition: all 0.2s; }
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
textarea.form-control { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.form-help { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }
.req { color: var(--danger); margin-left: 2px; }

/* 多选平台/类型 */
.chip-group { display: flex; gap: 10px; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid var(--border); border-radius: 50px; cursor: pointer; font-size: 0.85rem; color: var(--text-secondary); }
.chip input { display: none; }
.chip.checked { background: var(--primary-light); border-color: var(--primary); color: var(--primary); font-weight: 600; }

/* 提示 */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 0.88rem; }
.alert-success { background: rgba(56,161,105,0.1); color: #2f855a; border: 1px solid rgba(56,161,105,0.3); }
.alert-danger { background: rgba(229,62,62,0.1); color: #c53030; border: 1px solid rgba(229,62,62,0.3); }
.validation-summary { color: var(--danger); font-size: 0.85rem; margin-bottom: 12px; }
.text-muted { color: var(--text-muted); }

/* 分页 */
.pagination { display: flex; gap: 6px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.pagination a, .pagination span { padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border); font-size: 0.82rem; color: var(--text-secondary); }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.pagination-bar .pagination { margin-top: 0; }
.pagination-info { font-size: 0.82rem; color: var(--text-muted); }
.pagination .ellipsis { border: none; padding: 6px 4px; }

/* 登录/注册 */
.auth-wrap { max-width: 400px; margin: 40px auto; }

/* 新建任务：内容来源切换 + 手动上传 */
.form-section { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); margin: 20px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.source-switch { display: flex; gap: 16px; }
.source-option { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; font-size: 0.9rem; color: var(--text-secondary); }
.manual-type { border: 1px dashed var(--border); border-radius: 8px; padding: 12px 14px; margin-bottom: 12px; }
.manual-type-title { font-size: 0.85rem; font-weight: 600; color: var(--primary); margin-bottom: 10px; }
.file-list { font-size: 0.78rem; color: var(--text-secondary); margin-top: 6px; word-break: break-all; line-height: 1.5; }

/* 宣傳簡報 */
.brief-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 10px; }
.brief-item { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; background: var(--bg); border-radius: 6px; }
.brief-label { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; }
.brief-item span:last-child { font-size: 0.88rem; color: var(--text); word-break: break-word; }

/* 內容項列表 */
.content-list { display: flex; flex-direction: column; gap: 14px; }
.content-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.content-item-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.content-item-title { font-weight: 600; color: var(--text); }

/* 文案前後對比 */
.text-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.compare-col { border: 1px solid var(--border); border-radius: 6px; padding: 12px; }
.compare-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); margin-bottom: 8px; }
.compare-headline { font-weight: 700; margin-bottom: 6px; color: var(--text); }
.compare-body { font-size: 0.88rem; color: var(--text-secondary); white-space: pre-wrap; word-break: break-word; line-height: 1.7; }

/* 媒體（圖片/視頻） */
.media-thumb { display: inline-block; max-width: 100%; }
.media-thumb img { max-width: 260px; max-height: 200px; border-radius: 6px; border: 1px solid var(--border); object-fit: cover; transition: transform 0.15s; }
.media-thumb img:hover { transform: scale(1.02); }
.media-video { max-width: 420px; max-height: 260px; border-radius: 6px; border: 1px solid var(--border); }
.media-url { font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; word-break: break-all; }
.media-url a { color: var(--primary); }

/* 響應式：窄屏前後對比改單列 */
@media (max-width: 720px) {
    .text-compare { grid-template-columns: 1fr; }
}

/* article inline images */
.article-images { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }
.article-images .media-thumb { width: 130px; height: 130px; overflow: hidden; border-radius: 6px; }
.article-images .media-thumb img { width: 100%; height: 100%; object-fit: cover; }