/* ============================================
   专利微友云 v2 - 专业专利检索系统样式
   ============================================ */

/* ---- CSS变量 ---- */
:root {
    --primary: #1565c0;
    --primary-light: #1976d2;
    --primary-dark: #0d47a1;
    --primary-bg: #e3f2fd;
    --success: #2e7d32;
    --success-light: #e8f5e9;
    --warning: #e65100;
    --warning-light: #fff3e0;
    --danger: #c62828;
    --danger-light: #ffebee;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --transition: all 0.25s ease;
}

/* ---- 基础重置 ---- */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    font-size: 14px;
    line-height: 1.6;
    min-height: 100vh;
}

/* ---- 通用组件 ---- */
.card {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 16px;
    border: 1px solid var(--gray-200);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}
.card-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.card-body { padding: 20px; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #388e3c; }
.btn-outline { background: transparent; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover { background: var(--gray-100); border-color: var(--gray-400); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-full { width: 100%; justify-content: center; }

select, input[type="text"], input[type="password"], input[type="date"], textarea {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--gray-800);
    transition: var(--transition);
    background: #fff;
}
select:focus, input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

/* ============================================
   登录页面
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d47a1 0%, #1565c0 30%, #1976d2 60%, #42a5f5 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}
.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255,255,255,0.05) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
}
@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-2%, -2%) rotate(3deg); }
}

.login-container {
    background: rgba(255, 255, 255, 0.97);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: 40px 36px;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}
.login-header { text-align: center; margin-bottom: 32px; }
.login-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}
.login-header .logo i {
    font-size: 36px;
    color: var(--primary);
}
.login-header .logo h1 {
    font-size: 26px;
    color: var(--primary-dark);
    font-weight: 700;
    letter-spacing: 1px;
}
.tagline {
    color: var(--gray-500);
    font-size: 13px;
    font-weight: 400;
}

.login-form .form-group {
    margin-bottom: 20px;
}
.login-form label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.login-form label i {
    width: 16px;
    color: var(--primary);
    margin-right: 4px;
}
.login-form input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
}
.form-error {
    color: var(--danger);
    font-size: 13px;
    min-height: 20px;
    margin-bottom: 12px;
    text-align: center;
}
.login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}
.login-footer p {
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.8;
}

/* ============================================
   主界面 - 顶部导航
   ============================================ */
.header {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.logo-small {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-dark);
}
.logo-small i { font-size: 24px; color: var(--primary); }
.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--gray-600);
}
.expire-badge {
    background: var(--success-light);
    color: var(--success);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

/* ============================================
   检索面板
   ============================================ */
.main-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 16px;
}
.search-tabs {
    display: flex;
    gap: 0;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.tab-btn {
    padding: 7px 16px;
    border: none;
    background: #fff;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}
.tab-btn.active {
    background: var(--primary);
    color: #fff;
}
.tab-btn:not(.active):hover {
    background: var(--gray-100);
}
.search-tab-content { display: none; }
.search-tab-content.active { display: block; }

/* 简单检索 */
.search-input-group {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.field-select {
    width: 120px;
    flex-shrink: 0;
    padding: 10px 12px;
}
.search-input-group input {
    flex: 1;
    min-width: 0;
    font-size: 15px;
}
.search-options {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--gray-600);
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}
.date-range {
    display: flex;
    align-items: center;
    gap: 6px;
}
.date-range input[type="date"] {
    padding: 6px 10px;
    font-size: 13px;
}

/* 语义检索 */
.search-form textarea {
    width: 100%;
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
}
.semantic-options {
    display: flex;
    gap: 24px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.option-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--gray-600);
}
.option-group label { font-weight: 500; white-space: nowrap; }
.option-group select { padding: 6px 10px; font-size: 13px; }
.ai-tips {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--warning-light);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--warning);
    margin-top: 12px;
}
.ai-tips i { font-size: 16px; }

/* ============================================
   检索进度
   ============================================ */
.progress-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 20px 0;
}
.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    opacity: 0.3;
    transition: all 0.5s ease;
}
.step.active { opacity: 1; }
.step.done { opacity: 0.7; }
.step-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: var(--gray-100);
    color: var(--gray-400);
    transition: var(--transition);
}
.step.active .step-icon {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(21, 101, 192, 0.3);
}
.step.done .step-icon {
    background: var(--success);
    color: #fff;
}
.step-text {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 500;
}
.step.active .step-text, .step.done .step-text { color: var(--gray-800); }
.step-connector {
    width: 40px;
    height: 2px;
    background: var(--gray-300);
    margin: 0 8px;
    margin-bottom: 22px;
    transition: var(--transition);
}
.step-connector.active { background: var(--primary); }
.progress-detail {
    text-align: center;
    color: var(--gray-600);
    font-size: 13px;
    padding-top: 8px;
}

/* ============================================
   结果面板
   ============================================ */
.result-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.result-count {
    font-size: 13px;
    color: var(--gray-600);
    padding-right: 12px;
    border-right: 1px solid var(--gray-300);
}
.result-toolbar {
    padding: 12px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.filter-group select {
    padding: 6px 10px;
    font-size: 13px;
    min-width: 110px;
}

/* 结果列表 */
.result-list { padding: 0; }
.patent-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
    cursor: default;
}
.patent-item:hover {
    background: var(--primary-bg);
}
.patent-item:last-child { border-bottom: none; }
.patent-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 6px;
}
.patent-id-link {
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}
.patent-id-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}
.patent-type-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    flex-shrink: 0;
}
.badge-invention { background: #e3f2fd; color: #1565c0; }
.badge-utility { background: #e8f5e9; color: #2e7d32; }
.badge-design { background: #fff3e0; color: #e65100; }
.badge-pct { background: #f3e5f5; color: #7b1fa2; }

.patent-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 6px;
    line-height: 1.5;
}
.patent-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 8px;
}
.patent-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.patent-meta .label { color: var(--gray-400); }
.patent-abstract {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.patent-abstract.expanded {
    -webkit-line-clamp: unset;
}
.patent-actions {
    margin-top: 8px;
    display: flex;
    gap: 8px;
}
.patent-actions .btn { font-size: 11px; padding: 4px 10px; }
.expand-btn {
    font-size: 12px;
    color: var(--primary);
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px 0;
    font-family: inherit;
}
.expand-btn:hover { text-decoration: underline; }

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: 20px;
}
.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: #fff;
    cursor: pointer;
    font-size: 13px;
    color: var(--gray-600);
    transition: var(--transition);
    font-family: inherit;
}
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.page-info {
    font-size: 13px;
    color: var(--gray-500);
    margin: 0 12px;
}

/* ============================================
   检索式弹窗
   ============================================ */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    backdrop-filter: blur(4px);
}
.modal-content {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 640px;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    border-bottom: 1px solid var(--gray-200);
}
.modal-header h3 {
    font-size: 16px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--gray-100);
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: var(--transition);
}
.modal-close:hover { background: var(--gray-200); }
.modal-body { padding: 24px; }
.query-section {
    margin-bottom: 20px;
}
.query-section label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}
.query-box {
    padding: 12px 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-700);
}
.concept-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.concept-tag {
    padding: 5px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 14px;
    font-size: 13px;
    font-weight: 500;
}
.code-box {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    background: #1e293b;
    color: #e2e8f0;
    border: none;
    font-size: 13px;
    line-height: 1.8;
    word-break: break-all;
}

/* ============================================
   Loading & Toast
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}
.loading-spinner {
    text-align: center;
}
.loading-spinner i {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 12px;
}
.loading-spinner p {
    font-size: 14px;
    color: var(--gray-600);
}

.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gray-900);
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 3000;
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
}
.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    text-align: center;
    padding: 20px;
    font-size: 12px;
    color: var(--gray-500);
    line-height: 1.8;
    max-width: 1100px;
    margin: 0 auto;
}
.footer p:first-child { color: var(--gray-600); font-weight: 500; }

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 768px) {
    .header { padding: 0 14px; height: 50px; }
    .logo-small { font-size: 15px; }
    .logo-small i { font-size: 20px; }
    .user-info { display: none; }
    .main-content { padding: 12px 10px; }
    .card-header { flex-direction: column; align-items: flex-start; gap: 10px; padding: 12px 16px; }
    .card-body { padding: 14px; }
    .search-input-group { flex-direction: column; }
    .field-select { width: 100%; }
    .search-options { flex-direction: column; align-items: flex-start; gap: 10px; }
    .date-range { flex-wrap: wrap; }
    .semantic-options { flex-direction: column; gap: 12px; }
    .result-actions { width: 100%; }
    .result-count { border-right: none; padding-right: 0; width: 100%; margin-bottom: 8px; }
    .filter-group { width: 100%; }
    .filter-group select { flex: 1; min-width: 0; }
    .patent-top { flex-direction: column; gap: 4px; }
    .patent-meta { gap: 8px 14px; }
    .progress-steps { flex-wrap: wrap; gap: 4px; }
    .step-connector { width: 20px; margin-bottom: 18px; }
    .step-icon { width: 40px; height: 40px; font-size: 16px; }
    .step-text { font-size: 11px; }
    .login-container { padding: 30px 24px; }
    .login-header .logo h1 { font-size: 22px; }
}

@media (max-width: 480px) {
    .card-header h2 { font-size: 14px; }
    .patent-title { font-size: 14px; }
    .patent-abstract { font-size: 12px; }
    .pagination { gap: 2px; }
    .page-btn { padding: 6px 10px; font-size: 12px; }
}