/* ========================================
   全局样式与变量
   ======================================== */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: var(--text-primary);
    background: var(--bg-secondary);
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    animation: logoBreath 3s ease-in-out infinite;
}

/* Logo呼吸动画 */
@keyframes logoBreath {
    0%, 100% {
        box-shadow: 0 0 10px rgba(99, 102, 241, 0.3),
                    0 0 20px rgba(236, 72, 153, 0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.5),
                    0 0 30px rgba(236, 72, 153, 0.4);
    }
}

/* Logo渐变流动效果 */
.logo::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    top: -50%;
    left: -50%;
    animation: logoShine 3s ease-in-out infinite;
}

@keyframes logoShine {
    0% {
        transform: rotate(0deg) translate(-50%, -50%);
    }
    100% {
        transform: rotate(360deg) translate(-50%, -50%);
    }
}

/* Logo悬停效果 */
.logo:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.6),
                0 8px 40px rgba(236, 72, 153, 0.5);
}

.logo:hover svg {
    animation: logoIconBounce 0.6s ease-in-out;
}

@keyframes logoIconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.logo svg {
    width: 1.5rem;
    height: 1.5rem;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: brandNameGradient 3s ease-in-out infinite;
    cursor: pointer;
    transition: var(--transition);
}

/* 品牌名称渐变流动 */
@keyframes brandNameGradient {
    0%, 100% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
}

.brand-name:hover {
    letter-spacing: 0.05em;
    transform: translateY(-1px);
}

.nav-stats {
    display: flex;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: var(--transition);
    animation: numberPulse 2s ease-in-out infinite;
}

@keyframes numberPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.stat-item:hover .stat-number {
    color: var(--secondary-color);
    transform: scale(1.15);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    transition: var(--transition);
}

.stat-item:hover .stat-label {
    color: var(--text-secondary);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    padding: 4rem 0 3rem;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* 搜索框 */
.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.5rem;
    height: 1.5rem;
    color: var(--text-tertiary);
    pointer-events: none;
}

#searchInput {
    width: 100%;
    padding: 1rem 3.5rem;
    font-size: 1.125rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-primary);
    transition: var(--transition);
    outline: none;
}

#searchInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-clear {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2rem;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-clear:hover {
    background: var(--text-tertiary);
    color: white;
}

.search-clear svg {
    width: 1rem;
    height: 1rem;
}

/* 快速标签 */
.quick-tags {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tag-label {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.tag {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

/* ========================================
   分类筛选
   ======================================== */
.filters {
    padding: 1.5rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 73px;
    z-index: 90;
}

.filter-scroll {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    scrollbar-width: thin;
}

.filter-scroll::-webkit-scrollbar {
    height: 4px;
}

.filter-scroll::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 2px;
}

.filter-scroll::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 2px;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--primary-light);
    background: rgba(99, 102, 241, 0.05);
}

.filter-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.filter-icon {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    transition: all 0.3s ease;
}

.filter-btn.active .filter-icon {
    stroke: white;
    fill: none;
}

/* 为 "全部" 按钮的星星图标添加特殊样式 */
.filter-btn[data-category="all"] .filter-icon {
    fill: currentColor;
    stroke: none;
}

/* ========================================
   结果头部
   ======================================== */
.results-header {
    padding: 2rem 0 1rem;
}

.results-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.results-count {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.results-count strong {
    color: var(--primary-color);
    font-weight: 600;
}

.view-toggle {
    display: flex;
    gap: 0.5rem;
}

.view-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-tertiary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.view-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.view-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* ========================================
   卡片网格
   ======================================== */
.cards-section {
    padding: 1rem 0 4rem;
    min-height: 60vh;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.card-icon {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
}

.card-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 列表视图 */
.cards-grid.list-view {
    grid-template-columns: 1fr;
}

.cards-grid.list-view .card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.25rem 1.5rem;
}

.cards-grid.list-view .card-header {
    margin-bottom: 0;
    flex-direction: row;
    gap: 1.5rem;
}

.cards-grid.list-view .card-icon {
    width: 3rem;
    height: 3rem;
    font-size: 1.5rem;
}

.cards-grid.list-view .card-content {
    flex: 1;
}

.cards-grid.list-view .card-title {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.cards-grid.list-view .card-description {
    -webkit-line-clamp: 2;
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-secondary);
}

/* ========================================
   加载状态
   ======================================== */
.loading-state {
    text-align: center;
    padding: 4rem 2rem;
}

.loader {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-state p {
    color: var(--text-secondary);
}

/* ========================================
   模态框
   ======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s;
}

.modal-content {
    position: relative;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--text-tertiary);
    color: white;
}

.modal-close svg {
    width: 1.25rem;
    height: 1.25rem;
}

.modal-body {
    padding: 2.5rem;
    overflow-y: auto;
    max-height: 80vh;
}

.modal-header {
    margin-bottom: 2rem;
}

.modal-ext-icon {
    width: 5rem;
    height: 5rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.modal-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.modal-category {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.modal-description {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.modal-description h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.modal-description p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-stats {
        display: none;
    }
    
    .filter-scroll {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .quick-tags {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .brand-name {
        font-size: 1.25rem;
    }
    
    #searchInput {
        font-size: 1rem;
        padding: 0.875rem 3rem;
    }
    
    .results-header {
        padding: 1.5rem 0 0.75rem;
    }
}

/* ========================================
   AI 相关样式
   ======================================== */

/* AI 生成的卡片样式 */
.card.ai-generated {
    border: 2px solid #8b5cf6;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(99, 102, 241, 0.05));
}

.card.ai-generated:hover {
    border-color: #7c3aed;
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

/* AI 徽章 */
.ai-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-md);
}

/* AI 标签（用于模态框） */
.ai-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

/* AI 提示信息 */
.ai-notice {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid #8b5cf6;
    border-radius: var(--radius-sm);
    color: #6b21a8;
    font-size: 0.875rem;
}

/* AI 加载动画 */
.ai-loading-spinner {
    margin: 2rem auto;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(139, 92, 246, 0.2);
    border-top-color: #8b5cf6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* AI 加载状态的空状态样式覆盖 */
#emptyState .ai-loading-spinner {
    margin-top: 1.5rem;
}

/* ========================================
   深度搜索按钮样式
   ======================================== */

/* 深度搜索按钮 */
.deep-search-btn {
    margin: 2rem auto 1rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35), 0 0 0 0 rgba(139, 92, 246, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    min-width: 140px;
}

/* 光波效果 */
.deep-search-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.6s ease;
}

.deep-search-btn:hover::before {
    left: 100%;
}

/* 悬停效果 */
.deep-search-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 30px rgba(139, 92, 246, 0.45), 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.deep-search-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 10px rgba(139, 92, 246, 0.3);
}


/* 深度搜索提示文字 */
.deep-search-hint {
    margin-top: 0.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
    opacity: 0.8;
}

/* 空状态中的强调文字 */
#emptyState strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .deep-search-btn {
        padding: 0.875rem 2rem;
        font-size: 1rem;
        min-width: 130px;
    }
}