/* === 全局重置与变量 === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f4f6fc;
    --surface: #ffffff;
    --text: #1a1a2e;
    --text-light: #555;
    --primary: #6c63ff;
    --primary-light: #8b83ff;
    --shadow: 0 8px 30px rgba(0,0,0,0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s ease;
    --card-bg: #ffffff;
    --border: #e2e8f0;
}

body.dark {
    --bg: #0f0f23;
    --surface: #1a1a2e;
    --text: #e0e0e0;
    --text-light: #aaa;
    --shadow: 0 8px 30px rgba(0,0,0,0.4);
    --card-bg: #16213e;
    --border: #2a2a4a;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === 导航栏 === */
.navbar {
    background: var(--surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.nav-logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text);
    border-radius: 3px;
    transition: var(--transition);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* === 推荐区 === */
.featured-section {
    padding: 40px 0;
}

.featured-card {
    background: linear-gradient(135deg, var(--primary), #9b59b6);
    color: white;
    border-radius: var(--radius);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    box-shadow: 0 20px 40px rgba(108, 99, 255, 0.3);
    transition: transform var(--transition);
}

.featured-card:hover {
    transform: translateY(-5px);
}

.featured-content {
    flex: 1;
}

.featured-badge {
    background: rgba(255,255,255,0.2);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 12px;
}

.featured-content h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.featured-content p {
    opacity: 0.9;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.featured-image i {
    opacity: 0.8;
}

/* === 搜索区 === */
.search-section {
    padding: 20px 0;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 1.2rem;
}

.search-box input {
    width: 100%;
    padding: 16px 16px 16px 48px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--surface);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108, 99, 255, 0.15);
}

/* === 分类 === */
.categories-section {
    padding: 20px 0;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 24px;
    font-weight: 700;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.category-btn {
    padding: 10px 22px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.95rem;
}

.category-btn:hover, .category-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: scale(1.05);
}

/* === 工具卡片网格 === */
.tools-section {
    padding: 40px 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: contain;
}

.card-rating i {
    color: #ddd;
    font-size: 0.9rem;
}

.card-rating i.star-filled {
    color: #f1c40f;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.5;
}

.card-footer {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn {
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-light);
    transform: scale(1.02);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
    background: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-sm:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-icon {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
    font-size: 1rem;
}

.btn-icon:hover, .btn-icon.active {
    color: #e74c3c;
    border-color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}

.badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.badge-recommend {
    background: #2ecc71;
    color: white;
}

/* === 页脚 === */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 30px 0;
    text-align: center;
    margin-top: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

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

.footer p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* === 管理后台 === */
.admin-body {
    background: var(--bg);
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-form {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-width: 400px;
    width: 100%;
}

.login-form h2 {
    margin-bottom: 20px;
    text-align: center;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
}

.login-form .btn {
    width: 100%;
    justify-content: center;
}

.login-hint {
    text-align: center;
    margin-top: 16px;
}

.error-msg {
    color: #e74c3c;
    text-align: center;
    margin-bottom: 12px;
}

.success-msg {
    color: #2ecc71;
    text-align: center;
    padding: 12px;
    background: rgba(46, 204, 113, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

.admin-panel {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 30px;
}

.admin-header h1 {
    font-size: 1.8rem;
}

.admin-section {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.admin-section h2 {
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.admin-form input, .admin-form textarea, .admin-form select {
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 0.95rem;
}

.admin-form textarea {
    min-height: 80px;
    resize: vertical;
}

.admin-form label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.admin-table-wrapper {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th, .admin-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.admin-table th {
    background: var(--bg);
    font-weight: 600;
}

.btn-danger {
    background: #e74c3c;
    color: white;
    border-color: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

/* === 内页通用 === */
.page-content {
    min-height: 60vh;
    padding: 60px 0;
}

.page-content h1 {
    margin-bottom: 20px;
}

.page-content p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 700px;
}

/* === 响应式 === */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--surface);
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        padding: 20px;
        box-shadow: var(--shadow);
        border-bottom: 1px solid var(--border);
    }
    .nav-links.open {
        display: flex;
    }
    .hamburger {
        display: flex;
    }
    .featured-card {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }
    .featured-content h3 {
        font-size: 1.5rem;
    }
    .tools-grid {
        grid-template-columns: 1fr;
    }
    .category-filters {
        justify-content: center;
    }
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }
}
====FILE:js/main.js===
// === 主题切换 ===
(function() {
    const toggleBtn = document.getElementById('themeToggle');
    const icon = toggleBtn?.querySelector('i');
    const savedTheme = localStorage.getItem('theme') || 'light';
    if (savedTheme === 'dark') {
        document.body.classList.add('dark');
        if (icon) icon.className = 'fas fa-sun';
    }
    toggleBtn?.addEventListener('click', () => {
        document.body.classList.toggle('dark');
        const isDark = document.body.classList.contains('dark');
        localStorage.setItem('theme', isDark ? 'dark' : 'light');
        if (icon) icon.className = isDark ? 'fas fa-sun' : 'fas fa-moon';
    });
})();

// === 汉堡菜单 ===
(function() {
    const hamburger = document.getElementById('hamburger');
    const navLinks = document.getElementById('navLinks');
    hamburger?.addEventListener('click', () => {
        navLinks?.classList.toggle('open');
    });
    // 点击链接后关闭菜单
    navLinks?.querySelectorAll('a').forEach(link => {
        link.addEventListener('click', () => {
            navLinks.classList.remove('open');
        });
    });
})();

// === 分类筛选 ===
(function() {
    const filters = document.querySelectorAll('.category-btn');
    const cards = document.querySelectorAll('.tool-card');
    
    filters.forEach(btn => {
        btn.addEventListener('click', () => {
            filters.forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
            const cat = btn.dataset.category;
            cards.forEach(card => {
                if (cat === 'all' || card.dataset.category === cat) {
                    card.style.display = 'block';
                } else {
                    card.style.display = 'none';
                }
            });
        });
    });
})();

// === 搜索功能 ===
(function() {
    const searchInput = document.getElementById('searchInput');
    const cards = document.querySelectorAll('.tool-card');
    
    searchInput?.addEventListener('input', function() {
        const query = this.value.toLowerCase().trim();
        cards.forEach(card => {
            const name = card.dataset.name?.toLowerCase() || '';
            const desc = card.querySelector('.card-desc')?.textContent?.toLowerCase() || '';
            if (name.includes(query) || desc.includes(query)) {
                card.style.display = 'block';
            } else {
                card.style.display = 'none';
            }
        });
    });
})();

// === 收藏功能 (localStorage) ===
(function() {
    let favorites = JSON.parse(localStorage.getItem('aiFavorites')) || [];
    
    function updateFavButtons() {
        document.querySelectorAll('.favorite-btn').forEach(btn => {
            const id = btn.dataset.id;
            const icon = btn.querySelector('i');
            if (favorites.includes(id)) {
                icon.className = 'fas fa-heart';
                btn.classList.add('active');
            } else {
                icon.className = 'far fa-heart';
                btn.classList.remove('active');
            }
        });
    }
    
    document.querySelectorAll('.favorite-btn').forEach(btn => {
        btn.addEventListener('click', function(e) {
            e.preventDefault();
            const id = this.dataset.id;
            const idx = favorites.indexOf(id);
            if (idx === -1) {
                favorites.push(id);
            } else {
                favorites.splice(idx, 1);
            }
            localStorage.setItem('aiFavorites', JSON.stringify(favorites));
            updateFavButtons();
        });
    });
    
    updateFavButtons();
})();

// === 访问记录 (localStorage) ===
(function() {
    let history = JSON.parse(localStorage.getItem('aiHistory')) || [];
    
    document.querySelectorAll('.tool-card a.btn-sm').forEach(link => {
        link.addEventListener('click', function(e) {
            const card = this.closest('.tool-card');
            if (card) {
                const id = card.dataset.id;
                const name = card.dataset.name;
                const url = this.href;
                // 去重
                history = history.filter(h => h.id !== id);
                history.unshift({ id, name, url, time: new Date().toLocaleString() });
                if (history.length > 50) history = history.slice(0, 50);
                localStorage.setItem('aiHistory', JSON.stringify(history));
            }
        });
    });
})();

// === 静态内页 - 收藏夹页面 ===
// 在 favorites.html 中会用到此函数
function renderFavoritesPage() {
    const container = document.getElementById('favoritesContainer');
    if (!container) return;
    const favorites = JSON.parse(localStorage.getItem('aiFavorites')) || [];
    const tools = <?= json_encode($tools ?? []) ?>;
    
    if (favorites.length === 0) {
        container.innerHTML = '<p style="text-align:center;padding:40px;">暂无收藏，快去首页收藏你喜欢的AI工具吧！</p>';
        return;
    }
    
    const favTools = tools.filter(t => favorites.includes(t.id));
    container.innerHTML = favTools.map(t => `
        <div class="tool-card">
            <div class="card-header">
                <img src="${t.icon}" alt="${t.name}" class="card-icon" onerror="this.src='https://via.placeholder.com/48?text=AI'">
                <div class="card-rating">${'★'.repeat(t.rating)}${'☆'.repeat(5-t.rating)}</div>
            </div>
            <h3 class="card-title">${t.name}</h3>
            <p class="card-desc">${t.description}</p>
            <div class="card-footer">
                <a href="${t.url}" target="_blank" class="btn btn-sm">访问 <i class="fas fa-external-link-alt"></i></a>
                <button class="btn-icon favorite-btn" data-id="${t.id}" title="取消收藏"><i class="fas fa-heart"></i></button>
            </div>
        </div>
    `).join('');
}

// === 静态内页 - 历史记录页面 ===
function renderHistoryPage() {
    const container = document.getElementById('historyContainer');
    if (!container) return;
    const history = JSON.parse(localStorage.getItem('aiHistory')) || [];
    
    if (history.length === 0) {
        container.innerHTML = '<p style="text-align:center;padding:40px;">暂无访问记录。</p>';
        return;
    }
    
    container.innerHTML = `
        <table class="admin-table" style="margin-top:20px;">
            <thead><tr><th>工具名称</th><th>访问时间</th><th>链接</th></tr></thead>
            <tbody>
                ${history.map(h => `
                    <tr>
                        <td>${h.name}</td>
                        <td>${h.time}</td>
                        <td><a href="${h.url}" target="_blank">访问</a></td>
                    </tr>
                `).join('')}
            </tbody>
        </table>
        <button onclick="localStorage.removeItem('aiHistory');location.reload();" class="btn btn-sm" style="margin-top:16px;">清除历史记录</button>
    `;
}

// === 页面加载完成后执行 ===
document.addEventListener('DOMContentLoaded', function() {
    if (document.getElementById('favoritesContainer')) {
        // 如果是收藏页，需要先获取数据（通过PHP注入或重新请求）
        // 这里简单处理：在favorites.html中通过<script>标签引入此文件并调用函数
        // 实际项目中可以通过fetch获取data.json
        fetch('data/data.json')
            .then(res => res.json())
            .then(data => {
                window.__tools = data.tools;
                renderFavoritesPageWithData(data.tools);
            });
    }
    if (document.getElementById('historyContainer')) {
        renderHistoryPage();
    }
});

function renderFavoritesPageWithData(tools) {
    const container = document.getElementById('favoritesContainer');
    if (!container) return;
    const favorites = JSON.parse(localStorage.getItem('aiFavorites')) || [];
    
    if (favorites.length === 0) {
        container.innerHTML = '<p style="text-align:center;padding:40px;">暂无收藏，快去首页收藏你喜欢的AI工具吧！</p>';
        return;
    }
    
    const favTools = tools.filter(t => favorites.includes(t.id));
    container.innerHTML = favTools.map(t => `
        <div class="tool-card">
            <div class="card-header">
                <img src="${t.icon}" alt="${t.name}" class="card-icon" onerror="this.src='https://via.placeholder.com/48?text=AI'">
                <div class="card-rating">${'★'.repeat(t.rating)}${'☆'.repeat(5-t.rating)}</div>
            </div>
            <h3 class="card-title">${t.name}</h3>
            <p class="card-desc">${t.description}</p>
            <div class="card-footer">
                <a href="${t.url}" target="_blank" class="btn btn-sm">访问 <i class="fas fa-external-link-alt"></i></a>
                <button class="btn-icon favorite-btn" data-id="${t.id}" title="取消收藏"><i class="fas fa-heart"></i></button>
            </div>
        </div>
    `).join('');
    
    // 重新绑定收藏事件
    document.querySelectorAll('.favorite-btn').forEach(btn => {
        btn.addEventListener('click', function(e) {
            e.preventDefault();
            const id = this.dataset.id;
            let favs = JSON.parse(localStorage.getItem('aiFavorites')) || [];
            favs = favs.filter(f => f !== id);
            localStorage.setItem('aiFavorites', JSON.stringify(favs));
            this.closest('.tool-card').remove();
            if (!document.querySelector('.tool-card')) {
                container.innerHTML = '<p style="text-align:center;padding:40px;">暂无收藏。</p>';
            }
        });
    });
}