/* ============================================
   城市更新政策智能检索系统
   深色科技主题 · 动感交互
   ============================================ */

:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #0d1321;
    --bg-card: rgba(13, 19, 33, 0.85);
    --bg-card-hover: rgba(20, 30, 55, 0.95);
    --text-primary: #e8ecf1;
    --text-secondary: #8b9bb4;
    --text-muted: #5a6a82;
    --accent: #00d4ff;
    --accent-dim: rgba(0, 212, 255, 0.15);
    --accent-glow: rgba(0, 212, 255, 0.4);
    --border: rgba(0, 212, 255, 0.12);
    --border-hover: rgba(0, 212, 255, 0.3);
    --danger: #ff4757;
    --success: #2ed573;
    --gradient-start: #00d4ff;
    --gradient-end: #0077ff;
    --font-main: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== 加载动画 ===== */
#loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    gap: 20px;
}
.loader-ring {
    display: inline-block;
    position: relative;
    width: 64px;
    height: 64px;
}
.loader-ring div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 48px;
    height: 48px;
    margin: 8px;
    border: 4px solid var(--accent);
    border-radius: 50%;
    animation: loader-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: var(--accent) transparent transparent transparent;
}
.loader-ring div:nth-child(1) { animation-delay: -0.45s; }
.loader-ring div:nth-child(2) { animation-delay: -0.3s; }
.loader-ring div:nth-child(3) { animation-delay: -0.15s; }
@keyframes loader-ring {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loading-text {
    font-size: 16px;
    color: var(--text-secondary);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}
.loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
}
.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
    transition: width 0.5s ease;
}

/* ===== 头部 ===== */
.header {
    background: linear-gradient(180deg, rgba(10,15,26,0.95) 0%, rgba(10,15,26,0.8) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    text-align: center;
}
.btn-back-fixed {
    position: absolute;
    top: 16px;
    left: 24px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    text-decoration: none;
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.2s;
    z-index: 101;
    font-family: var(--font-main);
}
.btn-back-fixed:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}
.btn-config-fixed {
    position: absolute;
    top: 16px;
    right: 24px;
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.2s;
    z-index: 101;
}
.btn-config-fixed:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.btn-back-under {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: rgba(13, 19, 33, 0.5);
    transition: all 0.2s;
    margin-bottom: 4px;
}
.btn-back-under:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(0, 212, 255, 0.1);
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}
.logo-centered {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
}
.logo-centered .logo-icon {
    font-size: 28px;
}
.logo-centered .logo-text h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}
.logo-centered .logo-sub {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}
.header-stats {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}
.header-credit {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* ===== 搜索区域 ===== */
.search-section {
    padding: 32px 24px;
    background: linear-gradient(180deg, rgba(0,212,255,0.03) 0%, transparent 100%);
}
.search-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.search-box {
    display: flex;
    gap: 12px;
    align-items: center;
}
#search-input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition);
}
#search-input:focus {
    outline: none;
    border-color: var(--border-hover);
}
#search-input::placeholder {
    color: var(--text-muted);
}
.btn-search:active, .btn-rag:active {
    transform: scale(0.97);
}
.btn-search, .btn-rag {
    padding: 12px 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    color: var(--text-secondary);
    background: var(--bg-card);
}
.btn-search:hover {
    border-color: rgba(255,107,107,0.4);
    color: #ff8e8e;
    background: rgba(255,107,107,0.08);
    transform: translateY(-1px);
}
.btn-rag:hover {
    border-color: var(--border-hover);
    color: var(--accent);
    background: var(--accent-dim);
    transform: translateY(-1px);
}
.search-tips {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== 分类筛选 ===== */
.category-filter {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 8px 0;
}
.cat-filter {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 400;
    cursor: pointer;
    background: transparent;
    color: var(--text-muted);
    transition: all var(--transition);
}
.cat-filter:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}
.cat-filter.active {
    background: rgba(0,212,255,0.1);
    color: var(--accent);
    border-color: rgba(0,212,255,0.25);
    box-shadow: none;
}

/* ===== 主内容区 ===== */
.main-content {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px 24px;
    gap: 1px;
    height: calc(100vh - 220px);
    min-height: 500px;
}

/* ===== 左侧面板 ===== */
.left-panel {
    width: 420px;
    min-width: 320px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius) 0 0 var(--radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.panel-header {
    padding: 14px 18px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.result-count {
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 10px;
    font-weight: 700;
}
.results-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
    gap: 12px;
}
.empty-icon {
    font-size: 48px;
    opacity: 0.3;
}

/* 结果卡片 */
.result-card {
    padding: 14px 16px;
    margin-bottom: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    animation: cardIn 0.3s ease forwards;
    opacity: 0;
}
@keyframes cardIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.result-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3), 0 0 0 1px rgba(0,212,255,0.08);
}
.result-card:active {
    transform: translateY(-1px) scale(1);
}
.result-card.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim), 0 4px 16px rgba(0,212,255,0.1);
    background: rgba(0,212,255,0.05);
}
.result-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    border-radius: 4px 0 0 4px;
    opacity: 0.8;
}
/* 分类颜色 */
.result-card.cat-national::before { background: #FF6B6B; }
.result-card.cat-policy::before { background: #4D96FF; }
.result-card.cat-policy2::before { background: #6BCB77; }
.result-card.cat-standard::before { background: #FFD93D; }
.result-card.cat-default::before { background: #95a5a6; }

.result-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 12px;
}
.result-type {
    color: white;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 700;
    white-space: nowrap;
}
.result-type.type-national { background: #FF6B6B; }
.result-type.type-policy { background: #4D96FF; }
.result-type.type-policy2 { background: #6BCB77; }
.result-type.type-standard { background: #d4a017; color: #333; }
.result-type.type-default { background: #95a5a6; }
.result-score {
    font-size: 11px;
    color: var(--accent);
    font-weight: 700;
    margin-left: auto;
}
.result-title {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.5;
    font-weight: 500;
    margin-bottom: 4px;
}
.result-meta {
    font-size: 11px;
    color: var(--text-muted);
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.result-abstract {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== 右侧详情面板 ===== */
.right-panel {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0 var(--radius) var(--radius) 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.panel-actions {
    display: flex;
    gap: 8px;
}
.btn-action {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: all var(--transition);
}
.btn-action:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}
.detail-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}
.detail-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.detail-std-code {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.detail-std-name {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}
.detail-clause {
    font-size: 14px;
    color: var(--accent);
    font-weight: 600;
}
.detail-text {
    font-size: 14px;
    line-height: 2.0;
    color: var(--text-primary);
    white-space: pre-wrap;
    padding: 20px;
    background: rgba(0,0,0,0.2);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent);
}
.detail-actions {
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 3px 12px rgba(0,212,255,0.2);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,212,255,0.3);
}
.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}
.btn-secondary:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

/* 关键词高亮 */
.highlight {
    background: rgba(255, 241, 118, 0.25);
    color: #fff176;
    padding: 1px 3px;
    border-radius: 3px;
    font-weight: 600;
}

/* ===== 弹窗 ===== */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}
.modal.show { display: flex; }
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    animation: modalIn 0.3s ease;
}
.modal-small { max-width: 450px; }
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}
.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
}
.modal-close {
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
    background: none;
    border: none;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.modal-close:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}
.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* RAG 消息 */
.rag-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 8px 0;
}
.rag-message {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    max-width: 90%;
    animation: messageIn 0.3s ease;
}
@keyframes messageIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.rag-message.user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
}
.rag-message.assistant {
    align-self: flex-start;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    line-height: 1.8;
}
.rag-message.assistant .rag-sources {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
}
.rag-message.assistant .rag-sources a {
    color: var(--accent);
    text-decoration: none;
    margin-right: 8px;
}
.rag-message.assistant .rag-sources a:hover {
    text-decoration: underline;
}
.rag-input-area {
    display: flex;
    gap: 10px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
#rag-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text-primary);
}
#rag-input:focus {
    outline: none;
    border-color: var(--accent);
}
#rag-send {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
#rag-send:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,212,255,0.3);
}

/* API 配置 */
.api-notice {
    text-align: center;
    padding: 16px;
    background: var(--accent-dim);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--accent);
}
.api-notice button {
    margin-left: 8px;
    padding: 6px 14px;
    background: var(--accent);
    color: #0a0f1a;
    border: none;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}
.config-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.config-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.config-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}
.config-field input, .config-field select {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text-primary);
}
.config-field input:focus, .config-field select:focus {
    outline: none;
    border-color: var(--accent);
}
.config-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 8px;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .main-content { flex-direction: column; height: auto; }
    .left-panel { width: 100%; min-width: auto; border-radius: var(--radius) var(--radius) 0 0; max-height: 50vh; }
    .right-panel { border-radius: 0 0 var(--radius) var(--radius); min-height: 300px; }
    .search-box { flex-wrap: wrap; }
    #search-input { width: 100%; }
    .btn-search, .btn-rag { flex: 1; }
    .category-filter { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
    .modal-content { width: 96%; max-height: 92vh; }
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* 加载 shimmer 效果 */
.shimmer {
    background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}