:root {
    --ai-primary: #1a3c6e;
    --ai-primary-dark: #0d1f3c;
    --ai-primary-deeper: #081428;
    --ai-primary-light: #e8eef6;
    --ai-accent: #c41e24;
    --ai-accent-light: #fef2f2;
    --ai-gold: #b8860b;
    --ai-gold-light: #fef9e7;
    --ai-bg: #f0f2f5;
    --ai-card-shadow: 0 2px 12px rgba(0,0,0,.06);
    --ai-card-shadow-hover: 0 8px 30px rgba(0,0,0,.12);
    --ai-radius: 10px;
    --ai-transition: .25s ease;
}
*, *::before, *::after { box-sizing: border-box; }
body { background: var(--ai-bg); font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif; color: #2c3e50; line-height: 1.8; margin: 0; padding: 0; }

/* ====== 顶部国徽装饰条 ====== */
.ai-top-bar { height: 6px; background: linear-gradient(90deg, #c41e24 0%, #d4a843 30%, #c41e24 50%, #d4a843 70%, #c41e24 100%); background-size: 200% 100%; }

/* ====== 导航栏 — 与 header.temp.html 完全一致 ====== */
.ai-navbar { background: rgba(13,31,60,.96) !important; backdrop-filter: blur(20px); border-bottom: 1px solid rgba(212,168,67,.2); position: sticky; top: 0; z-index: 1030; line-height: 1.5; padding: 10px 0; }
.ai-navbar .navbar-brand { display: flex; align-items: center; gap: 12px; color: #fff !important; text-decoration: none; }
.ai-navbar .logo-icon { width: 42px; height: 42px; border-radius: 10px; background: linear-gradient(135deg, #d4a843 0%, #f0d060 100%); display: flex; align-items: center; justify-content: center; font-size: 22px; font-weight: 700; color: #0d1f3c; box-shadow: 0 4px 12px rgba(212,168,67,.35); flex-shrink: 0; }
.ai-navbar .logo-text { font-size: 18px; font-weight: 600; letter-spacing: 1px; color: #fff; line-height: 1.2; }
.ai-navbar .logo-text small { display: block; font-size: 11px; color: rgba(212,168,67,.9); font-weight: 400; letter-spacing: 2px; margin-top: 3px; }
.ai-navbar .nav-link { color: rgba(255,255,255,.8) !important; font-size: 15px; padding: 8px 14px !important; white-space: nowrap; line-height: 1.5; border-radius: 8px; transition: all .25s ease; text-decoration: none; margin: 0 1px; }
.ai-navbar .nav-link:hover { color: #fff !important; background: rgba(255,255,255,.12); }
.ai-navbar .nav-link.active { color: #fff !important; background: linear-gradient(135deg, rgba(212,168,67,.35), rgba(212,168,67,.15)) !important; border: 1px solid rgba(212,168,67,.5) !important; font-weight: 600; text-shadow: 0 1px 3px rgba(0,0,0,.5); }
.ai-navbar .navbar-toggler { border-color: rgba(212,168,67,.5); padding: 6px 10px; }
.ai-navbar .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23d4a843' stroke-linecap='round' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e"); }

/* ====== 大通栏横幅 ====== */
.ai-banner { background: linear-gradient(135deg, #0d1f3c 0%, #1a3c6e 25%, #2a5298 50%, #1a3c6e 75%, #0d1f3c 100%); padding: 52px 0 44px; margin-bottom: 0; position: relative; overflow: hidden; text-align: center; }
.ai-banner-slides { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; }
.ai-banner-slide { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background-size: cover; background-position: center; opacity: 0; transition: opacity .15s ease; }
.ai-banner-slide.active { opacity: 1; }
.ai-banner-slide::after { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: linear-gradient(135deg, rgba(13,31,60,.82) 0%, rgba(26,60,110,.78) 25%, rgba(42,82,152,.72) 50%, rgba(26,60,110,.78) 75%, rgba(13,31,60,.82) 100%); }
.ai-banner::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 1; background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
.ai-banner::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px; z-index: 2; background: linear-gradient(90deg, transparent 5%, var(--ai-gold) 30%, var(--ai-accent) 50%, var(--ai-gold) 70%, transparent 95%); }
.ai-banner h1 { font-size: 2.2rem; font-weight: 800; color: #fff; margin: 0; letter-spacing: 8px; text-shadow: 0 2px 8px rgba(0,0,0,.3); position: relative; z-index: 1; }
.ai-banner .ai-banner-sub { font-size: 1.05rem; color: rgba(255,255,255,.55); margin-top: 12px; letter-spacing: 4px; position: relative; z-index: 1; font-weight: 300; }
.ai-banner-search { margin-top: 24px; position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; }
.ai-search-scope-tabs { display: flex; align-items: center; justify-content: center; gap: 8px; }
.ai-scope-item { cursor: pointer; margin: 0; user-select: none; }
.ai-scope-item input { display: none; }
.ai-scope-btn { display: inline-flex; align-items: center; padding: 5px 16px; font-size: 0.88rem; border-radius: 20px; color: rgba(255, 255, 255, 0.8); background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.25); transition: all 0.25s ease; backdrop-filter: blur(4px); }
.ai-scope-item:hover .ai-scope-btn { color: #fff; background: rgba(255, 255, 255, 0.22); border-color: rgba(255, 255, 255, 0.4); }
.ai-scope-item input:checked + .ai-scope-btn { color: #0d1f3c; background: linear-gradient(135deg, var(--ai-gold), #e6b84d); border-color: var(--ai-gold); font-weight: 600; box-shadow: 0 2px 10px rgba(229, 169, 59, 0.4); }
.ai-search-form-row { display: flex; align-items: center; justify-content: center; gap: 14px; width: 100%; max-width: 640px; }
.ai-search-form { display: flex; align-items: center; width: 100%; background: rgba(255,255,255,.12); border: 2px solid rgba(255,255,255,.25); border-radius: 50px; overflow: hidden; transition: var(--ai-transition); backdrop-filter: blur(4px); }
.ai-search-form:focus-within { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.45); box-shadow: 0 0 24px rgba(255,255,255,.1); }
.ai-search-field-select { background: rgba(255,255,255,.15); border: none; border-right: 1px solid rgba(255,255,255,.2); color: #fff; font-size: .88rem; padding: 12px 8px 12px 16px; outline: none; cursor: pointer; font-family: inherit; appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='rgba(255,255,255,.6)'%3E%3Cpath d='M0 0l5 6 5-6z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 26px; white-space: nowrap; flex-shrink: 0; }
.ai-search-field-select option { background: #1a3c6e; color: #fff; }
.ai-search-input { flex: 1; background: none; border: none; outline: none; color: #fff; font-size: 1.08rem; padding: 14px 24px; letter-spacing: 1.5px; font-family: inherit; }
.ai-search-input::placeholder { color: rgba(255,255,255,.45); }
.ai-search-btn { background: linear-gradient(135deg, var(--ai-gold), #d4a843); border: none; color: #0d1f3c; width: 50px; height: 50px; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--ai-transition); border-radius: 50%; margin: 3px; flex-shrink: 0; }
.ai-search-btn:hover { background: linear-gradient(135deg, #f0d060, var(--ai-gold)); transform: scale(1.08); }
.ai-search-clear { color: rgba(255,255,255,.7); font-size: .92rem; text-decoration: none; letter-spacing: 1px; transition: var(--ai-transition); white-space: nowrap; border: 1px solid rgba(255,255,255,.25); padding: 8px 18px; border-radius: 22px; }
.ai-search-clear:hover { color: #fff; background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.4); }

/* ====== 筛选卡片 ====== */
.ai-filter-card { border: none; border-radius: var(--ai-radius); box-shadow: var(--ai-card-shadow); overflow: hidden; margin-bottom: 1rem; border-top: 3px solid var(--ai-primary); }
.ai-filter-card .card-body { padding: .9rem 1.2rem; background: #fff; }

/* ====== 筛选展开/收起 ====== */
.ai-filter-first-body { padding: .6rem 1.2rem; border-bottom: 1px solid #e2e8f0; display: flex; align-items: flex-start; gap: 10px; position: relative; }
.ai-filter-first-body .ai-cat-nav { margin-bottom: 0; flex: 1; min-width: 0; transition: max-height .35s cubic-bezier(.4,0,.2,1); }
.ai-filter-first-body .ai-cat-sub { background: transparent !important; border-bottom: none !important; padding: 0 !important; gap: 6px !important; }
.ai-filter-first-body .ai-filter-group { margin-bottom: 0; flex: 1; min-width: 0; }
.ai-filter-first-body .ai-filter-options { transition: max-height .35s cubic-bezier(.4,0,.2,1); }
.ai-filter-card:not(.expanded) .ai-filter-first-body .ai-filter-options,
.ai-filter-card:not(.expanded) .ai-filter-first-body .ai-cat-nav { max-height: 36px; overflow: hidden; }
.ai-filter-card.expanded .ai-filter-first-body .ai-filter-options,
.ai-filter-card.expanded .ai-filter-first-body .ai-cat-nav { max-height: 800px; }
.ai-filter-toggle-btn { background: none; border: 1px solid #cbd5e1; color: #94a3b8; padding: 3px 12px; border-radius: 16px; font-size: .78rem; cursor: pointer; transition: var(--ai-transition); display: inline-flex; align-items: center; gap: 4px; margin-left: auto; letter-spacing: .5px; font-family: inherit; white-space: nowrap; vertical-align: middle; flex-shrink: 0; margin-top: 2px; position: relative; z-index: 2; }
.ai-filter-toggle-btn:hover { background: #f1f5f9; color: #1a3c6e; border-color: #94a3b8; }
.ai-filter-toggle-btn svg { transition: transform .35s ease; width: 12px; height: 12px; }
.ai-filter-toggle-btn.expanded svg { transform: rotate(180deg); }
.ai-filter-body-wrap { overflow: hidden; transition: max-height .45s cubic-bezier(.4,0,.2,1), opacity .35s ease, padding .35s ease; max-height: 3000px; opacity: 1; }
.ai-filter-body-wrap.collapsed { max-height: 0 !important; opacity: 0; padding-top: 0 !important; padding-bottom: 0 !important; }

/* ====== 筛选组 ====== */
.ai-filter-group { margin-bottom: .6rem; display: flex; align-items: flex-start; }
.ai-filter-group:last-child { margin-bottom: 0; }
.ai-filter-label { width: 72px; font-weight: 600; color: var(--ai-primary); text-align: right; padding-right: 8px; line-height: 24px; flex-shrink: 0; font-size: .78rem; letter-spacing: .5px; border-right: 2px solid var(--ai-gold); margin-right: 8px; }
.ai-filter-options { flex: 1; display: flex; flex-wrap: wrap; gap: 3px; }

/* ====== 筛选标签 ====== */
.ai-filter-tag, .ai-filter-clear { display: inline-block; padding: 3px 10px; border-radius: 13px; font-size: .84rem; cursor: pointer; transition: var(--ai-transition); text-decoration: none; border: 1px solid #e2e8f0; background: #fff; color: #64748b; user-select: none; line-height: 1.5; letter-spacing: .2px; }
.ai-filter-tag:hover { border-color: var(--ai-primary); color: var(--ai-primary); background: var(--ai-primary-light); transform: translateY(-1px); box-shadow: 0 2px 8px rgba(26,60,110,.12); text-decoration: none; }
.ai-filter-tag.active { background: var(--ai-primary); color: #fff; border-color: var(--ai-primary); box-shadow: 0 2px 8px rgba(26,60,110,.3); font-weight: 600; }
.ai-filter-clear { background: #f9fafb; color: #9ca3af; border-color: #e5e7eb; }
.ai-filter-clear:hover { border-color: var(--ai-accent); color: var(--ai-accent); background: var(--ai-accent-light); text-decoration: none; }
.ai-filter-clear.active { background: #6b7280; color: #fff; border-color: #6b7280; font-weight: 600; }

/* ====== 栏目导航标签 ====== */
.ai-cat-nav { display: flex; flex-wrap: wrap; gap: 8px; padding: .5rem 1.2rem; background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%); border-bottom: 1px solid #e2e8f0; }
.ai-cat-nav a { display: inline-block; padding: 4px 12px; border-radius: 14px; font-size: .88rem; color: #475569; text-decoration: none; transition: var(--ai-transition); border: 1.5px solid transparent; font-weight: 600; letter-spacing: .3px; }
.ai-cat-nav a:hover { background: #e2e8f0; color: #1e293b; text-decoration: none; transform: translateY(-1px); }
.ai-cat-nav a.active { background: var(--ai-primary); color: #fff; box-shadow: 0 2px 8px rgba(26,60,110,.3); border-color: var(--ai-primary); }

/* ====== 子分类导航 ====== */
.ai-cat-sub { background: #fff !important; border-bottom: 2px solid var(--ai-primary-light); padding: .4rem 1.2rem; gap: 8px !important; }
.ai-cat-sub a { font-size: .86rem; padding: 3px 10px; border: 1px solid #e2e8f0; border-radius: 12px; color: #64748b; font-weight: 500; letter-spacing: 0; }
.ai-cat-sub a:hover { background: var(--ai-primary-light); color: var(--ai-primary); border-color: var(--ai-primary); }
.ai-cat-sub a.active { background: var(--ai-primary); color: #fff; border-color: var(--ai-primary); box-shadow: 0 2px 6px rgba(26,60,110,.2); }

/* ====== 结果统计 ====== */
.ai-result-info { padding: 0 0 .5rem; color: #64748b; font-size: .95rem; border-bottom: 2px solid var(--ai-primary-light); margin-bottom: 1.2rem; letter-spacing: .5px; display: flex; justify-content: space-between; align-items: center; }
.ai-result-info strong { color: var(--ai-accent); font-weight: 800; font-size: 1.4rem; }

/* ====== 结果列表（左侧精致垂直时间轴线） ====== */
.ai-result-list { list-style: none; margin: 0; padding: 0 0 0 28px; position: relative; }
.ai-result-list::before { content: ''; position: absolute; left: 8px; top: 28px; bottom: 28px; width: 2px; background: linear-gradient(180deg, var(--ai-primary) 0%, #93c5fd 40%, #cbd5e1 80%, #e2e8f0 100%); border-radius: 2px; z-index: 1; }
.ai-result-item { background: #fff; border-radius: var(--ai-radius); padding: 1.6rem 2rem; margin-bottom: 1.4rem; box-shadow: var(--ai-card-shadow); transition: var(--ai-transition); border: 1px solid #f1f5f9; border-left: 4px solid transparent; position: relative; display: flex; align-items: flex-start; gap: 16px; content-visibility: auto; contain-intrinsic-size: 0 160px; }
/* 时间轴节点圆点 */
.ai-result-item::before { content: ''; position: absolute; left: -28px; top: 28px; width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 3px solid var(--ai-primary); box-shadow: 0 0 0 3px rgba(26,60,110,.12); transition: all .25s cubic-bezier(.4,0,.2,1); z-index: 2; }
.ai-result-item:hover { box-shadow: var(--ai-card-shadow-hover); transform: translateY(-3px); border-left-color: var(--ai-primary); }
.ai-result-item:hover::before { background: var(--ai-primary); border-color: #fff; box-shadow: 0 0 0 4px rgba(26,60,110,.25), 0 0 10px rgba(42,82,152,.4); transform: scale(1.25); }
.ai-result-item::after { content: ''; position: absolute; bottom: 0; left: 2rem; right: 2rem; height: 1px; background: linear-gradient(90deg, transparent, #e2e8f0, transparent); }
.ai-result-item:last-child::after { display: none; }
.ai-item-content { flex: 1; min-width: 0; }
.ai-result-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 6px; }
.ai-result-title-wrap { flex: 1; min-width: 0; line-height: 1.6; }
.ai-item-num { font-weight: 700; color: #64748b; font-size: 1.1rem; margin-right: 6px; font-variant-numeric: tabular-nums; display: inline-block; vertical-align: middle; }
.ai-class-badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; background: var(--ai-primary-light); border: 1px solid #dbeafe; border-radius: 4px; font-size: .8rem; color: var(--ai-primary); font-weight: 600; letter-spacing: .3px; vertical-align: middle; margin-right: 8px; }
.ai-class-badge svg { color: var(--ai-primary); }
.ai-result-title-link, .ai-result-title a { font-size: 1.15rem; color: #1e293b; text-decoration: none; font-weight: 700; transition: color .2s; letter-spacing: .3px; vertical-align: middle; }
.ai-result-title-link:hover, .ai-result-title a:hover { color: var(--ai-primary); text-decoration: none; }
.ai-result-header-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; margin-top: 2px; }
.ai-date-badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 20px; font-size: .8rem; color: #64748b; font-weight: 600; letter-spacing: .3px; white-space: nowrap; }
.ai-date-badge svg { color: var(--ai-primary); }
.ai-result-summary { font-size: .92rem; color: #64748b; line-height: 1.7; margin-top: 10px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; text-overflow: ellipsis; }
.ai-result-newstext { margin-top: 10px; display: flex; align-items: flex-start; gap: 8px; }
.ai-result-newstext-label { background: linear-gradient(135deg, #6b7280, #9ca3af); color: #fff; font-size: .72rem; padding: 2px 10px; border-radius: 4px; white-space: nowrap; font-weight: 600; letter-spacing: 1px; flex-shrink: 0; margin-top: 2px; }
.ai-result-newstext-content { flex: 1; min-width: 0; font-size: .88rem; color: #475569; line-height: 1.7; }
.ai-result-newstext-content .newstext-toggle { color: var(--ai-primary); font-size: .82rem; text-decoration: none; cursor: pointer; white-space: nowrap; margin-left: 4px; }
.ai-result-newstext-content .newstext-toggle:hover { text-decoration: underline; }
.ai-result-keypoints { margin-top: 10px; display: flex; align-items: flex-start; gap: 8px; flex-wrap: wrap; }
.ai-result-kp-label { background: linear-gradient(135deg, #1a3c6e, #2a5298); color: #fff; font-size: .75rem; padding: 2px 10px; border-radius: 4px; white-space: nowrap; font-weight: 600; letter-spacing: 1px; flex-shrink: 0; margin-top: 2px; }
.ai-result-kp-list { flex: 1; min-width: 0; }
.ai-result-kp-item { font-size: .88rem; color: #475569; line-height: 1.6; padding-left: 14px; position: relative; margin-bottom: 4px; cursor: pointer; }
.ai-result-kp-item::before { content: ''; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--ai-gold); }
.ai-result-kp-item .kp-text { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ai-result-kp-item.kp-expanded .kp-text { -webkit-line-clamp: unset; }
.ai-result-kp-item.kp-extra { display: none; }
.ai-result-keypoints.kp-all-expanded .ai-result-kp-item.kp-extra { display: block; }
.ai-result-kp-toggle { font-size: .82rem; color: var(--ai-primary); cursor: pointer; margin-left: 22px; margin-top: 4px; user-select: none; letter-spacing: .5px; }
.ai-result-kp-toggle:hover { text-decoration: underline; }
.ai-result-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.ai-result-body { overflow: hidden; transition: max-height .4s cubic-bezier(.4,0,.2,1), opacity .3s ease; max-height: 2000px; opacity: 1; }
.ai-result-list.collapsed .ai-result-body { max-height: 0 !important; opacity: 0; }
.ai-collapse-all-btn { color: var(--ai-primary); cursor: pointer; font-size: .88rem; font-weight: 500; user-select: none; display: inline-flex; align-items: center; transition: color .2s; white-space: nowrap; }
.ai-collapse-all-btn:hover { color: #0d1f3c; }
.ai-collapse-all-btn svg { transition: transform .3s ease; }
.ai-result-list.collapsed ~ .ai-collapse-all-btn svg { transform: rotate(180deg); }
.ai-result-tag { display: inline-block; padding: 2px 8px; font-size: .74rem; border-radius: 12px; font-weight: 500; cursor: pointer; transition: var(--ai-transition); text-decoration: none; letter-spacing: .2px; }
.ai-result-tag-scenario { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.ai-result-tag-agency { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.ai-result-tag-people { background: #ede9fe; color: #5b21b6; border: 1px solid #ddd6fe; }
.ai-result-tag-place { background: #ccfbf1; color: #115e59; border: 1px solid #99f6e4; }
.ai-result-tag-value { background: #ffedd5; color: #9a3412; border: 1px solid #fed7aa; }
.ai-result-tag-default { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.ai-result-tag.active { font-weight: 700; box-shadow: 0 0 0 2px var(--ai-primary); transform: scale(1.05); border-color: var(--ai-primary); }
.ai-result-tag:hover { filter: brightness(0.92); transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,.1); text-decoration: none; }
.ai-result-date { font-size: .85rem; color: #94a3b8; white-space: nowrap; }
.ai-result-ref { display: inline-block; padding: 2px 8px; font-size: .72rem; border-radius: 4px; font-weight: 700; margin-left: 8px; vertical-align: middle; letter-spacing: .3px; }
.ai-result-ref-high { background: #fee2e2; color: #dc2626; border: 1px solid #fecaca; }
.ai-result-ref-mid { background: #fef3c7; color: #d97706; border: 1px solid #fde68a; }
.ai-result-ref-low { background: #f1f5f9; color: #94a3b8; border: 1px solid #e2e8f0; }

/* ====== 复选框 ====== */
.ai-item-check { flex-shrink: 0; display: flex; align-items: center; justify-content: center; width: 20px; height: 20px; margin-top: 6px; cursor: pointer; position: relative; }
.ai-item-check input { position: absolute; opacity: 0; width: 0; height: 0; }
.ai-check-mark { display: inline-block; width: 18px; height: 18px; border: 2px solid #cbd5e1; border-radius: 4px; background: #fff; transition: all .2s; position: relative; }
.ai-item-check input:checked + .ai-check-mark { background: var(--ai-primary); border-color: var(--ai-primary); }
.ai-item-check input:checked + .ai-check-mark::after { content: ''; position: absolute; left: 5px; top: 2px; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.ai-item-check:hover .ai-check-mark { border-color: var(--ai-primary); }
.ai-item-content { flex: 1; min-width: 0; }

/* ====== 操作工具栏 ====== */
.ai-action-bar { display: flex; align-items: center; gap: 16px; padding: 10px 0; margin-bottom: 8px; border-bottom: 1px solid #f1f5f9; }
.ai-select-all { display: flex; align-items: center; gap: 6px; cursor: pointer; font-size: .88rem; color: #475569; user-select: none; }
.ai-select-all input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; }
.ai-select-all input:checked + .ai-check-mark { background: var(--ai-primary); border-color: var(--ai-primary); }
.ai-select-all input:checked + .ai-check-mark::after { content: ''; position: absolute; left: 4px; top: 1px; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.ai-select-all .ai-check-mark { width: 16px; height: 16px; }
.ai-select-all-text { font-weight: 500; }
.ai-selected-count { font-size: .82rem; color: #94a3b8; }
.ai-selected-count strong { color: var(--ai-primary); font-weight: 700; }
.ai-action-btns { margin-left: auto; display: flex; gap: 10px; }
.ai-btn-ai, .ai-btn-export { display: inline-flex; align-items: center; padding: 7px 18px; border-radius: 6px; font-size: .88rem; font-weight: 600; cursor: pointer; transition: all .2s; border: none; letter-spacing: .3px; }
.ai-btn-ai { background: linear-gradient(135deg, #1a3c6e, #2a5298); color: #fff; box-shadow: 0 2px 8px rgba(26,60,110,.25); }
.ai-btn-ai:hover:not(:disabled) { background: linear-gradient(135deg, #0d1f3c, #1a3c6e); box-shadow: 0 4px 12px rgba(26,60,110,.35); transform: translateY(-1px); }
.ai-btn-export { background: #fff; color: #475569; border: 1.5px solid #d1d5db; }
.ai-btn-export:hover:not(:disabled) { border-color: var(--ai-primary); color: var(--ai-primary); background: var(--ai-primary-light); transform: translateY(-1px); }
.ai-btn-ai:disabled, .ai-btn-export:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }

/* ====== 分页与每页条数选择器 ====== */
.ai-pagination-container { display: flex; align-items: center; justify-content: center; padding: 2.5rem 0; gap: 20px; flex-wrap: wrap; }
.ai-pagination { display: flex; justify-content: center; margin: 0; gap: 6px; }
.ai-pagination .page-link { border-radius: 8px !important; border: 1.5px solid #d1d5db; color: #475569; font-size: .95rem; padding: .55rem 1rem; transition: var(--ai-transition); min-width: 42px; text-align: center; font-weight: 500; }
.ai-pagination .page-link:hover { background: var(--ai-primary-light); border-color: var(--ai-primary); color: var(--ai-primary); transform: translateY(-1px); }
.ai-pagination .page-item.active .page-link { background: var(--ai-primary); border-color: var(--ai-primary); color: #fff; box-shadow: 0 3px 10px rgba(26,60,110,.3); font-weight: 700; }
.ai-pagination .page-item.disabled .page-link { color: #cbd5e1; background: #f9fafb; }
.ai-pagesize-box { display: inline-flex; align-items: center; gap: 8px; background: #fff; padding: 6px 14px; border-radius: 8px; border: 1.5px solid #d1d5db; box-shadow: 0 1px 4px rgba(0,0,0,.04); }
.ai-pagesize-label { font-size: .88rem; color: #64748b; margin: 0; white-space: nowrap; user-select: none; font-weight: 500; }
.ai-pagesize-select { width: auto; min-width: 110px; font-size: .88rem; color: #1e293b; font-weight: 600; border-color: #cbd5e1; border-radius: 6px; padding: 4px 28px 4px 10px; cursor: pointer; background-color: #f8fafc; transition: var(--ai-transition); }
.ai-pagesize-select:hover { border-color: var(--ai-primary); background-color: #fff; }
.ai-pagesize-select:focus { border-color: var(--ai-primary); box-shadow: 0 0 0 3px rgba(26,60,110,.15); background-color: #fff; }

/* ====== 空结果 ====== */
.ai-empty { text-align: center; padding: 100px 20px; color: #94a3b8; }
.ai-empty-icon { font-size: 5rem; margin-bottom: 1.5rem; opacity: .3; }
.ai-empty-text { font-size: 1.15rem; letter-spacing: .5px; }

/* ====== 页脚 ====== */
.ai-footer { background: linear-gradient(135deg, #0d1f3c, #1a3c6e, #0d1f3c); color: rgba(255,255,255,.4); padding: 2.5rem 0; margin-top: 3rem; font-size: .88rem; letter-spacing: 1px; border-top: 3px solid var(--ai-gold); }
.ai-footer .container-xl { position: relative; }
.ai-footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--ai-gold), transparent); }

/* ====== 一键返回顶部按钮 ====== */
.ai-back-to-top {
    position: fixed;
    right: 32px;
    bottom: 36px;
    z-index: 1050;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1a3c6e, #2a5298);
    color: #ffffff;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 18px rgba(26, 60, 110, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.85);
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s, background 0.2s, box-shadow 0.2s;
    outline: none;
    padding: 0;
}
.ai-back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.ai-back-to-top:hover {
    background: linear-gradient(135deg, #0d1f3c, #1a3c6e);
    color: #ffffff;
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 6px 24px rgba(26, 60, 110, 0.48);
}
.ai-back-to-top:active {
    transform: translateY(0) scale(0.95);
    box-shadow: 0 2px 10px rgba(26, 60, 110, 0.3);
}
.ai-back-to-top svg {
    transition: transform 0.2s ease;
}
.ai-back-to-top:hover svg {
    transform: translateY(-2px);
}

/* ====== 响应式 ====== */
@media (max-width: 768px) {
    .ai-search-form-row { display: flex; flex-wrap: wrap; width: 100%; max-width: 100%; gap: 8px; }
    .ai-search-form { flex: 1 1 240px; min-width: 0; width: 100%; max-width: 100%; overflow: hidden; border-radius: 28px; }
    .ai-search-clear { margin-left: auto; padding: 7px 12px; font-size: .82rem; }
    .ai-search-field-select { flex: 0 1 76px; width: 76px; min-width: 0; max-width: 76px; padding: 10px 4px 10px 8px; font-size: .78rem; overflow: hidden; text-overflow: ellipsis; }
    .ai-search-input { flex: 1 1 auto; min-width: 0; width: 0; padding: 10px 8px; font-size: .92rem; }
    .ai-search-btn { flex: 0 0 38px; width: 38px; min-width: 38px; height: 38px; margin: 2px; padding: 0; }
    .ai-search-btn svg { width: 15px; height: 15px; }
    .ai-navbar .logo-text { font-size: 15px; }
    .ai-navbar .logo-text small { font-size: 9px; }
    .ai-navbar .logo-icon { width: 34px; height: 34px; font-size: 18px; }
    .ai-navbar .nav-link { font-size: 14px; padding: 8px 14px !important; }
    .ai-banner { padding: 32px 0 28px; }
    .ai-banner h1 { font-size: 1.4rem; letter-spacing: 3px; }
    .ai-banner .ai-banner-sub { font-size: .85rem; letter-spacing: 2px; }
    .ai-filter-group { flex-direction: column; }
    .ai-filter-label { width: 100%; text-align: left; padding-right: 0; margin-right: 0; margin-bottom: 8px; font-size: .9rem; border-right: none; border-bottom: 2px solid var(--ai-gold); padding-bottom: 6px; }
    .ai-filter-tag, .ai-filter-clear { padding: 3px 11px; font-size: .86rem; }
    .ai-result-list { padding-left: 14px; }
    .ai-result-list::before { left: 3px; top: 20px; bottom: 20px; }
    .ai-result-item { display: grid; grid-template-columns: 20px minmax(0, 1fr); align-items: start; padding: .9rem .75rem; gap: 7px; margin-bottom: .75rem; border-left-width: 3px; }
    .ai-result-item::before { left: -17px; top: 20px; width: 11px; height: 11px; border-width: 2px; }
    .ai-result-item::after { left: .75rem; right: .75rem; }
    .ai-item-check { width: 20px; height: 20px; margin-top: 3px; }
    .ai-item-content { width: 100%; min-width: 0; }
    .ai-result-header { flex-direction: column; gap: 5px; margin-bottom: 4px; min-width: 0; }
    .ai-result-title-wrap { width: 100%; min-width: 0; line-height: 1.5; }
    .ai-result-title a { display: inline; font-size: 1.02rem; overflow-wrap: anywhere; word-break: break-word; }
    .ai-result-header-right { width: 100%; min-width: 0; flex-wrap: wrap; margin-top: 0; }
    .ai-date-badge { font-size: .76rem; padding: 2px 8px; }
    .ai-result-summary { width: 100%; margin-top: 8px; line-height: 1.6; overflow-wrap: anywhere; word-break: break-word; }
    .ai-result-newstext { width: 100%; gap: 6px; align-items: flex-start; }
    .ai-result-newstext-label, .ai-result-kp-label { flex: 0 0 auto; padding: 2px 7px; font-size: .7rem; letter-spacing: 0; }
    .ai-result-newstext-content, .ai-result-kp-item { min-width: 0; font-size: .84rem; line-height: 1.6; overflow-wrap: anywhere; word-break: break-word; }
    .ai-result-keypoints { width: 100%; gap: 6px; align-items: flex-start; }
    .ai-result-kp-list { flex: 1 1 0; flex-basis: 0; min-width: 0; }
    .ai-result-kp-toggle { margin-left: 0; }
    .ai-action-bar { align-items: center; flex-wrap: wrap; gap: 8px; padding: 8px 0; }
    .ai-selected-count { margin-right: auto; }
    .ai-action-btns { width: 100%; margin-left: 0; gap: 8px; }
    .ai-btn-ai, .ai-btn-export { flex: 1 1 0; justify-content: center; min-height: 36px; padding: 6px 8px; font-size: .82rem; }
    .ai-result-date { white-space: normal; }
    .ai-result-tags { gap: 5px; }
    .ai-cat-nav { gap: 5px; padding: .45rem .7rem; }
    .ai-cat-nav a { padding: 5px 9px; font-size: .82rem; }
    .ai-cat-sub a { padding: 4px 8px; font-size: .8rem; }
    .ai-filter-card .card-body { padding: .65rem; }
    .ai-filter-first-body { padding: .5rem .65rem; gap: 6px; }
    .ai-filter-options { gap: 5px; }
    .ai-filter-tag, .ai-filter-clear { padding: 5px 9px; font-size: .82rem; }
    .ai-result-info { align-items: flex-start; flex-direction: column; gap: 3px; font-size: .86rem; }
    .ai-pagination { max-width: 100%; overflow-x: auto; justify-content: flex-start; padding: 2px 1px 6px; }
    .ai-pagination .page-item { flex: 0 0 auto; }
    .ai-pagination-container { width: 100%; overflow: hidden; }
    .ai-pagesize-box { max-width: 100%; }
    .ai-filter-card .card-header { padding: .6rem .8rem; font-size: .92rem; }
    .ai-pagination-container { flex-direction: column; align-items: stretch; gap: 8px; padding: 1.4rem 0; }
    .ai-pagination .page-link { font-size: .82rem; padding: .35rem .55rem; min-width: 34px; }
    .ai-pagesize-box { align-self: center; padding: 4px 9px; }
    .ai-pagesize-label { font-size: .8rem; }
    .ai-pagesize-select { font-size: .8rem; min-width: 96px; }
    .ai-back-to-top { right: 18px; bottom: 24px; width: 42px; height: 42px; }
}
@keyframes aiSpin { to { transform: rotate(360deg); } }