/*
Theme Name: AI工具导航主题
Theme URI: https://example.com
Author: Your Name
Author URI: https://example.com
Description: AI工具导航主题 - 科技极简风格，含工具展示、联盟跳转、SEO优化、广告管理
Version: 2.0.0
Requires at least: 5.8
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ai-tool-theme
Tags: ai, tools, navigation, affiliate, modern
*/

/* ========================================
   设计系统 · CSS变量
======================================== */
:root {
    /* 主色调 - 科技青蓝 */
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-primary-light: #38bdf8;
    --color-primary-50: #f0f9ff;
    --color-primary-100: #e0f2fe;

    /* 辅助色 - 翠绿高亮 */
    --color-accent: #10b981;
    --color-accent-dark: #059669;

    /* 中性色 */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0ea5e9 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);

    /* 圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.06);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
    --shadow-card-hover: 0 20px 40px -10px rgba(15, 23, 42, 0.15);

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 布局 */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    --sidebar-width: 300px;

    /* 字体 */
    --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", monospace;
}

/* 深色模式 */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-light: #1e293b;
    --gradient-card: linear-gradient(145deg, #1e293b 0%, #0f172a 100%);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.2);
}

/* ========================================
   基础重置
======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

::selection {
    background-color: var(--color-primary);
    color: #fff;
}

/* ========================================
   布局容器
======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: 4rem 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.section-title {
    position: relative;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    padding-left: 1rem;
    display: inline-flex;
    align-items: center;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.5);
}

/* ========================================
   按钮组件
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.4);
    color: #fff;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* ========================================
   标签组件
======================================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border-light);
}

.tag:hover {
    background: var(--color-primary-50);
    color: var(--color-primary);
    border-color: var(--color-primary-light);
}

.tag-primary {
    background: var(--color-primary-50);
    color: var(--color-primary);
    border-color: var(--color-primary-100);
}

.tag-accent {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-accent-dark);
    border-color: rgba(16, 185, 129, 0.2);
}

/* ========================================
   卡片组件
======================================== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-primary-100);
}

.card:hover::before {
    opacity: 1;
}

/* ========================================
   工具卡片网格
======================================== */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .tool-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .tool-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========================================
   头部导航
======================================== */
.site-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all var(--transition-normal);
}

[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.8);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 2rem;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.site-logo:hover {
    color: var(--color-primary);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.main-nav a {
    position: relative;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: transform var(--transition-normal);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: translateX(-50%) scaleX(1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
}

/* 深色模式切换 */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: rotate(15deg);
}

/* ========================================
   Hero区域
======================================== */
.hero-section {
    position: relative;
    padding: 6rem 0 5rem;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: float-glow 8s ease-in-out infinite;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: float-glow 10s ease-in-out infinite reverse;
}

@keyframes float-glow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -20px) scale(1.05); }
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: particle-float 15s linear infinite;
}

@keyframes particle-float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

.hero-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-title span {
    background: linear-gradient(135deg, #67e8f9 0%, #a7f3d0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-search {
    max-width: 560px;
    margin: 0 auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.hero-stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   搜索组件
======================================== */
.search-box {
    position: relative;
    width: 100%;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 1rem 1.25rem 1rem 3.25rem;
    font-size: 1rem;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.1);
}

.hero-section .search-input {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hero-section .search-input:focus {
    background: #fff;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2), 0 0 0 4px rgba(14, 165, 233, 0.3);
}

.search-icon {
    position: absolute;
    left: 1.125rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    pointer-events: none;
}

.hero-section .search-icon {
    color: var(--color-primary);
}

.search-shortcuts {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.search-shortcut {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    padding: 0.375rem 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.search-shortcut:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* 搜索下拉 */
.search-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-height: 420px;
    overflow-y: auto;
    z-index: 50;
    display: none;
    overflow: hidden;
}

.search-dropdown.active {
    display: block;
    animation: dropdown-in 0.2s ease-out;
}

@keyframes dropdown-in {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--color-border-light);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--color-bg-secondary);
}

.search-result-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    object-fit: contain;
    flex-shrink: 0;
    background: var(--color-bg-secondary);
}

.search-result-info {
    flex: 1;
    min-width: 0;
}

.search-result-title {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.search-result-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-type {
    flex-shrink: 0;
    font-size: 0.7rem;
    padding: 0.25rem 0.625rem;
    background: var(--color-primary-50);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    font-weight: 600;
}

/* ========================================
   分类导航
======================================== */
.category-section {
    padding: 2.5rem 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
}

.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.4s ease;
    z-index: 0;
    opacity: 0.1;
}

.category-btn:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(14, 165, 233, 0.2);
}

.category-btn:hover::before {
    left: 0;
}

.category-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
    transform: translateY(-2px);
}

.category-btn.active::before {
    display: none;
}

.category-btn-icon {
    font-size: 1.25rem;
    position: relative;
    z-index: 1;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.category-btn:hover .category-btn-icon {
    transform: scale(1.2) rotate(-5deg);
}

.category-btn-text {
    position: relative;
    z-index: 1;
}

/* ========================================
   置顶推荐轮播
======================================== */
.featured-carousel {
    position: relative;
    margin: 0 -0.75rem;
    padding: 0.5rem;
}

.featured-carousel-inner {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 1rem 0.5rem;
}

.featured-carousel-inner::-webkit-scrollbar {
    display: none;
}

.featured-card {
    flex: 0 0 calc(25% - 1.125rem);
    min-width: 300px;
    scroll-snap-align: start;
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.featured-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    z-index: 1;
}

.featured-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    z-index: 2;
}

.featured-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 25px 50px -12px rgba(14, 165, 233, 0.15), 0 10px 20px -6px rgba(15, 23, 42, 0.1);
    border-color: transparent;
}

.featured-card:hover::before {
    opacity: 1;
}

.featured-card:hover .featured-card-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 10px 25px -5px rgba(14, 165, 233, 0.35);
}

.featured-card:hover .featured-card-title {
    color: var(--color-primary);
}

.featured-card-body {
    padding: 1.5rem;
}

.featured-card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.featured-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    object-fit: contain;
    background: var(--color-bg-secondary);
    padding: 0.75rem;
    flex-shrink: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.featured-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-full);
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 10px rgba(14, 165, 233, 0.25);
}

.featured-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    line-height: 1.3;
    transition: color var(--transition-fast);
}

.featured-card-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.featured-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.featured-card-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: #f59e0b;
}

.featured-card-link {
    font-size: 0.8125rem;
    color: var(--color-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap var(--transition-fast);
}

.featured-card:hover .featured-card-link {
    gap: 0.5rem;
}

/* 轮播导航 */
.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    color: var(--color-text);
    z-index: 10;
    transition: all var(--transition-fast);
    opacity: 0;
}

.featured-carousel:hover .carousel-nav {
    opacity: 1;
}

.carousel-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    transform: translateY(-50%) scale(1.1);
}

.carousel-nav.prev {
    left: -0.5rem;
}

.carousel-nav.next {
    right: -0.5rem;
}

/* ========================================
   工具卡片
======================================== */
.tool-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.tool-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 25px 50px -12px rgba(14, 165, 233, 0.15), 0 10px 20px -6px rgba(15, 23, 42, 0.1);
    border-color: transparent;
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card:hover::after {
    opacity: 1;
    transform: scaleX(1);
}

.tool-card:hover .card-icon,
.tool-card:hover .card-icon-placeholder {
    transform: scale(1.08) rotate(-3deg);
    box-shadow: 0 10px 30px -10px rgba(14, 165, 233, 0.4);
}

.tool-card-link {
    display: block;
}

.tool-card-icon {
    margin-bottom: 1rem;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    object-fit: contain;
    background: var(--color-bg-secondary);
    padding: 0.5rem;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-icon-placeholder {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: linear-gradient(135deg, var(--color-primary-50), var(--color-bg-secondary));
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-title {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition-fast);
}

.tool-card:hover .card-title {
    color: var(--color-primary);
}

.card-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 1rem;
}

.tool-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-light);
    margin-bottom: 1rem;
}

.rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.rating-stars {
    color: #f59e0b;
    letter-spacing: -1px;
    font-size: 0.875rem;
}

.rating-value {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text);
    margin-left: 0.25rem;
}

.stat-count {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.tool-card-actions {
    display: flex;
    gap: 0.5rem;
}

.tool-card-actions .btn {
    flex: 1;
}

.tool-card-favorite {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
}

/* 收藏按钮 */
.favorite-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.favorite-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: scale(1.05);
}

.favorite-btn.active {
    background: linear-gradient(135deg, #f43f5e 0%, #ec4899 100%);
    border-color: transparent;
    color: #fff;
    animation: heart-beat 0.6s ease;
}

@keyframes heart-beat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
    50% { transform: scale(0.95); }
    75% { transform: scale(1.05); }
}

.favorite-btn .icon {
    font-size: 1rem;
}

/* ========================================
   页面标题区
======================================== */
.page-header {
    position: relative;
    padding: 3rem 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border-light);
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.page-header-desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* ========================================
   筛选栏
======================================== */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.filter-select {
    padding: 0.5rem 2.5rem 0.5rem 1rem;
    font-size: 0.875rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    appearance: none;
    color: var(--color-text);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    transition: all var(--transition-fast);
}

.filter-select:hover {
    border-color: var(--color-primary);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

/* ========================================
   侧边栏
======================================== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 88px;
}

.sidebar-widget {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.sidebar-widget:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-100);
    transform: translateY(-2px);
}

.sidebar-widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-widget:hover::before {
    opacity: 1;
}

.sidebar-widget-title {
    position: relative;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border-light);
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-widget-title::before {
    content: '';
    width: 4px;
    height: 1rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.sidebar-widget-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.sidebar-widget ul li {
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-fast);
}

.sidebar-widget ul li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.sidebar-widget ul li:hover {
    padding-left: 0.5rem;
}

.sidebar-widget ul li a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.sidebar-widget ul li a:hover {
    color: var(--color-primary);
}

.sidebar-tool-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.5rem !important;
    border-radius: var(--radius-md);
    margin: 0 -0.5rem;
}

.sidebar-tool-list li:hover {
    background: var(--color-bg-secondary);
    padding-left: 0.5rem !important;
}

.sidebar-tool-list img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    object-fit: contain;
    flex-shrink: 0;
    background: var(--color-bg-secondary);
    padding: 4px;
    transition: transform var(--transition-fast);
}

.sidebar-tool-list li:hover img {
    transform: scale(1.1);
}

.sidebar-category-list li a {
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    margin: 0 -0.75rem;
}

.sidebar-category-list li a:hover {
    background: var(--color-primary-50);
}

.sidebar-category-list .count {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background: var(--color-bg-secondary);
    padding: 0.125rem 0.625rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sidebar-category-list li a:hover .count {
    background: var(--color-primary);
    color: #fff;
}

/* ========================================
   分页组件
======================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem 0 0;
}

.page-numbers {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.pagination .current {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

/* ========================================
   面包屑导航
======================================== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb-item::after {
    content: '/';
    color: var(--color-border);
}

.breadcrumb-item:last-child::after {
    content: none;
}

.breadcrumb a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb-item:last-child {
    color: var(--color-text);
    font-weight: 500;
}

/* ========================================
   工具详情页
======================================== */
.tool-header-section {
    position: relative;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border-light);
    overflow: hidden;
}

.tool-header-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: 0;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.tool-header-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.tool-header {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 3.5rem 0;
}

@media (min-width: 768px) {
    .tool-header {
        flex-direction: row;
        align-items: flex-start;
        gap: 2rem;
    }
}

.tool-header-icon-wrapper {
    flex-shrink: 0;
    position: relative;
}

.tool-header-icon-wrapper::after {
    content: '';
    position: absolute;
    inset: -8px;
    background: var(--gradient-primary);
    border-radius: calc(var(--radius-2xl) + 8px);
    opacity: 0.2;
    filter: blur(12px);
    z-index: -1;
}

.tool-header-icon {
    width: 110px;
    height: 110px;
    border-radius: var(--radius-2xl);
    object-fit: contain;
    background: var(--color-surface);
    padding: 1.25rem;
    box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.2);
    border: 2px solid var(--color-border-light);
    transition: all var(--transition-normal);
}

.tool-header-icon:hover {
    transform: scale(1.05) rotate(-3deg);
    box-shadow: 0 25px 50px -12px rgba(14, 165, 233, 0.3);
}

.tool-header-icon-placeholder {
    width: 110px;
    height: 110px;
    border-radius: var(--radius-2xl);
    background: linear-gradient(135deg, var(--color-primary-50), var(--color-bg-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.2);
    border: 2px solid var(--color-border-light);
}

.tool-header-info {
    flex: 1;
    min-width: 0;
}

.tool-header-title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.tool-header-badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tool-header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.tool-header-meta > span {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
}

.tool-header-meta a {
    color: var(--color-primary);
}

.tool-header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tool-header-actions .btn {
    position: relative;
    overflow: hidden;
}

.tool-header-actions .btn-primary {
    background: var(--gradient-primary);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}

.tool-header-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(14, 165, 233, 0.45);
}

/* 优缺点 */
.pros-cons {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
    margin: 2.5rem 0;
}

@media (min-width: 768px) {
    .pros-cons {
        grid-template-columns: repeat(2, 1fr);
    }
}

.pros-list,
.cons-list {
    padding: 2rem;
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.pros-list:hover,
.cons-list:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pros-list::before,
.cons-list::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.pros-list::before {
    background: var(--gradient-accent);
}

.cons-list::before {
    background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
}

.pros-list {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.06) 0%, rgba(20, 184, 166, 0.03) 100%);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.cons-list {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.06) 0%, rgba(249, 115, 22, 0.03) 100%);
    border: 1px solid rgba(239, 68, 68, 0.15);
}

.pros-title,
.cons-title {
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.125rem;
}

.pros-title {
    color: #059669;
}

.cons-title {
    color: #dc2626;
}

.pros-title svg,
.cons-title svg {
    width: 22px;
    height: 22px;
    padding: 4px;
    border-radius: 50%;
}

.pros-title svg {
    background: rgba(16, 185, 129, 0.15);
}

.cons-title svg {
    background: rgba(239, 68, 68, 0.15);
}

.pros-list ul,
.cons-list ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.pros-list li,
.cons-list li {
    padding: 0.625rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.pros-list li:hover,
.cons-list li:hover {
    color: var(--color-text);
}

.pros-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.pros-list li::after {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 22px;
    height: 22px;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.cons-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.cons-list li::after {
    content: '✗';
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 22px;
    height: 22px;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

/* ========================================
   相关推荐
======================================== */
.related-section {
    margin: 3rem 0;
    padding-top: 2.5rem;
    border-top: 1px solid var(--color-border-light);
}

.related-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

/* ========================================
   文章卡片
======================================== */
.post-card {
    display: flex;
    gap: 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.post-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.15);
    border-color: transparent;
}

.post-card:hover::before {
    opacity: 1;
}

.post-card:hover .post-card-title {
    color: var(--color-primary);
}

.post-card:hover .post-card-thumbnail {
    transform: scale(1.05);
}

.post-card-thumbnail {
    width: 240px;
    height: 160px;
    object-fit: cover;
    flex-shrink: 0;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.post-card-content {
    flex: 1;
    padding: 1.5rem 1.5rem 1.5rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.post-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    line-height: 1.4;
    transition: color var(--transition-fast);
}

.post-card-title a {
    color: inherit;
}

.post-card-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: 0.75rem;
}

/* ========================================
   悬浮咨询按钮
======================================== */
.float-consult-btn {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
    z-index: 999;
    transition: all var(--transition-bounce);
    animation: float-bounce 3s ease-in-out infinite;
}

@keyframes float-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.float-consult-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(14, 165, 233, 0.5);
    color: #fff;
}

.float-consult-btn svg {
    width: 24px;
    height: 24px;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.35);
}

@media (max-width: 768px) {
    .float-consult-btn {
        bottom: 5rem;
        width: 52px;
        height: 52px;
    }
    
    .back-to-top {
        right: 1rem;
        bottom: 1rem;
        width: 44px;
        height: 44px;
    }
}

/* ========================================
   广告位
======================================== */
.ad-slot {
    text-align: center;
    margin: 2rem 0;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--color-border);
}

.ad-slot-horizontal {
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-slot-rectangle {
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========================================
   页脚
======================================== */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    margin-top: 4rem;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding: 4rem 0 3rem;
    position: relative;
    z-index: 1;
}

.footer-about h3 {
    font-size: 1.375rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-about p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 360px;
    margin-bottom: 1.25rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.3);
}

.site-footer h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--color-text);
    position: relative;
    padding-left: 0.75rem;
}

.site-footer h4::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 1rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.site-footer ul {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.site-footer ul li a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.site-footer ul li a::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--color-text-muted);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.site-footer ul li a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.site-footer ul li a:hover::before {
    background: var(--color-primary);
    transform: scale(1.5);
}

.footer-bottom {
    padding: 1.5rem 0;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    position: relative;
    z-index: 1;
}

.footer-bottom a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--color-primary);
}

/* ========================================
   响应式
======================================== */
@media (max-width: 1024px) {
    .section {
        padding: 3rem 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

    .section {
        padding: 2.5rem 0;
    }

    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 0.75rem 0;
        gap: 1rem;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
    }

    .main-nav.active {
        display: block;
        padding-top: 0.5rem;
        border-top: 1px solid var(--color-border-light);
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav a {
        display: block;
        padding: 0.875rem 0;
    }

    .main-nav a::after {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-section {
        padding: 3.5rem 0 3rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 2rem;
    }

    .hero-stat-value {
        font-size: 1.5rem;
    }

    .tool-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .featured-card {
        flex: 0 0 calc(100% - 2rem);
        min-width: auto;
    }

    .filter-bar {
        flex-direction: column;
        gap: 0.75rem;
    }

    .filter-group {
        width: 100%;
    }

    .filter-select {
        flex: 1;
        width: 100%;
    }

    .pagination {
        flex-wrap: wrap;
    }

    .page-header-title {
        font-size: 1.5rem;
    }

    .tool-header-title {
        font-size: 1.5rem;
    }

    .tool-header-icon {
        width: 72px;
        height: 72px;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .post-card {
        flex-direction: column;
    }

    .post-card-thumbnail {
        width: 100%;
        height: 200px;
    }

    .post-card-content {
        padding: 1rem 1.25rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .category-btn {
        padding: 0.625rem 1rem;
        font-size: 0.8125rem;
    }

    .tool-header-actions {
        flex-direction: column;
    }

    .tool-header-actions .btn {
        width: 100%;
    }
}

/* ========================================
   触摸设备优化
======================================== */
@media (hover: none) and (pointer: coarse) {
    .card:hover,
    .tool-card:hover,
    .post-card:hover {
        transform: none;
    }

    .carousel-nav {
        opacity: 1;
    }
}

/* ========================================
   动画
======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease-out backwards;
}

.animate-in-1 { animation-delay: 0.05s; }
.animate-in-2 { animation-delay: 0.1s; }
.animate-in-3 { animation-delay: 0.15s; }
.animate-in-4 { animation-delay: 0.2s; }
.animate-in-5 { animation-delay: 0.25s; }
.animate-in-6 { animation-delay: 0.3s; }

/* ========================================
   辅助类
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-accent-dark); }
.text-danger { color: #dc2626; }

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 选择禁用 */
.no-select {
    user-select: none;
    -webkit-user-select: none;
}

/* 溢出省略 */
.ellipsis {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}