/* 基础重置与全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-color: #f5f7fa;
    --white: #fff;
    --border-color: #e5e7eb;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --radius-sm: 4px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul {
    list-style: none;
}

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

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 通用区块 */
.section {
    padding: 40px 0;
}

/* 区块头部 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.section-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 2px;
}

.more-link {
    color: var(--primary-color);
    font-size: 14px;
}

.more-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 8px 20px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

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

/* 图标通用 */
[class^="icon-"], [class*=" icon-"] {
    display: inline-block;
    width: 20px;
    height: 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    vertical-align: middle;
}

.icon-search::before { content: "🔍"; font-size: 16px; }
.icon-update::before { content: "📥"; font-size: 16px; }
.icon-star::before { content: "⭐"; font-size: 16px; }
.icon-fire::before { content: "🔥"; font-size: 16px; }
.icon-hot::before { content: "📈"; font-size: 16px; }
.icon-category::before { content: "📂"; font-size: 16px; }
.icon-up::before { content: "⬆"; font-size: 16px; }
.icon-partner::before { content: "🤝"; font-size: 16px; }
.icon-office::before { content: "📊"; font-size: 24px; }
.icon-design::before { content: "🎨"; font-size: 24px; }
.icon-video::before { content: "🎬"; font-size: 24px; }
.icon-browser::before { content: "🌐"; font-size: 24px; }
.icon-security::before { content: "🛡️"; font-size: 24px; }
.icon-system::before { content: "⚙️"; font-size: 24px; }
.icon-development::before { content: "💻"; font-size: 24px; }
.icon-game::before { content: "🎮"; font-size: 24px; }