:root{--bg: #f5f7fa;--surface: #ffffff;--surface-muted: #f9fafc;--border: #e6e9f0;--border-strong: #d9dfea;--text: #1c2434;--text-secondary: #5b6577;--text-muted: #8b95a7;--primary: #2f6bf6;--primary-hover: #2559dd;--primary-soft: #eef3ff;--violet: #6d5bf6;--violet-soft: #f1eefe;--danger: #e5484d;--danger-hover: #cf3b40;--danger-soft: #fdeeee;--success: #1f9254;--success-soft: #e9f7ef;--warning: #b7791f;--warning-soft: #fff6e5;--radius-sm: 8px;--radius: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(20, 30, 55, .05);--shadow: 0 12px 30px -20px rgba(20, 30, 55, .3), 0 2px 6px rgba(20, 30, 55, .04);--shadow-lg: 0 30px 64px -30px rgba(20, 30, 55, .36), 0 4px 14px rgba(20, 30, 55, .06);--ring: 0 0 0 3px rgba(47, 107, 246, .16);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, 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2px;color:var(--text-muted)}.modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:24px}.modal__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#1118276b;animation:fade-in .16s ease-out}.modal__panel{position:relative;display:flex;flex-direction:column;width:100%;max-height:calc(100vh - 64px);background:var(--surface);border-radius:18px;box-shadow:var(--shadow-lg);animation:modal-in .18s ease-out}.modal__panel--small{max-width:404px}.modal__panel--medium{max-width:560px}.modal__panel--large{max-width:664px}.modal__header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:20px 22px 15px;border-bottom:1px solid var(--border)}.modal__title{font-size:17px;font-weight:650;letter-spacing:-.2px}.modal__description{margin-top:5px;font-size:13px;color:var(--text-muted)}.modal__body{padding:20px 22px;overflow-y:auto}.modal__footer{display:flex;align-items:center;justify-content:flex-end;gap:10px;padding:14px 22px 18px;border-top:1px solid var(--border)}.confirm-message{font-size:14px;line-height:1.7;color:var(--text-secondary)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes modal-in{0%{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}.detail{display:flex;flex-direction:column;gap:16px}.detail__meta{display:flex;align-items:center;gap:32px;flex-wrap:wrap;padding:14px 16px;background:var(--surface-muted);border:1px solid var(--border);border-radius:var(--radius)}.detail__meta-item{display:flex;flex-direction:column;gap:8px}.detail__meta-label{font-size:12px;color:var(--text-muted)}.detail__block{padding:15px 16px;background:#fcfdff;border:1px solid var(--border);border-radius:var(--radius)}.detail__block--answer{background:#f4f9ff;border-color:#dbe8ff}.detail__label{display:block;margin-bottom:8px;font-size:12.5px;font-weight:600;letter-spacing:.4px;color:var(--text-muted)}.detail__summary{font-size:15px;font-weight:600}.detail__content{font-size:14px;line-height:1.8;color:var(--text);white-space:pre-wrap}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:420px;padding:64px 24px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.empty-state__icon{display:flex;align-items:center;justify-content:center;width:58px;height:58px;margin-bottom:20px;border-radius:18px;background:var(--primary-soft);color:var(--primary)}.empty-state__title{font-size:18px;font-weight:650;letter-spacing:-.2px}.empty-state__description{margin-top:10px;font-size:14px;color:var(--text-secondary)}.empty-state__hint{margin-top:9px;font-size:12.5px;color:var(--text-muted)}.toast{position:fixed;top:22px;left:50%;transform:translate(-50%);z-index:200;display:flex;align-items:center;gap:8px;max-width:calc(100vw - 40px);padding:10px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);font-size:13.5px;animation:toast-in .2s ease-out}.toast--success svg{color:var(--success)}.toast--error svg{color:var(--danger)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}@media (max-width: 1080px){.form-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 900px){.admin-body{flex-direction:column}.sidebar{position:static;width:100%;height:auto;flex-direction:row;align-items:center;padding:10px 12px;border-right:0;border-bottom:1px solid var(--border);overflow-x:auto}.sidebar__nav{flex-direction:row;gap:6px}.nav-item{width:auto;white-space:nowrap}.nav-item__hint,.sidebar__footer{display:none}.content{padding:20px 16px 36px}.page__actions{width:100%}}@media (max-width: 640px){.login-card{padding:30px 22px 20px}.form-grid{grid-template-columns:minmax(0,1fr)}.filter-bar__search{max-width:none}.pagination{justify-content:center}}