:root {
    --win-blue: #005A9E;
    --win-blue-hover: #004578;
    --win-bg: #F3F2F1;
    --win-border: #CCCCCC;
    --win-text: #323130;
    --win-muted: #605E5C;
    --win-white: #FFFFFF;
    --win-success: #107C10;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--win-text); 
    background-color: var(--win-bg);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; transition: 0.2s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* 顶部导航 */
.header { background: var(--win-white); border-bottom: 1px solid var(--win-border); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }
.nav-container { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 60px; padding: 0 20px; }
.logo { font-size: 20px; font-weight: 600; display: flex; align-items: center; gap: 10px; color: var(--win-blue); }
.logo img { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--win-muted); padding: 5px 10px; border-radius: 2px; }
.nav-links a:hover, .nav-links a.active { background: #EDEBE9; color: var(--win-blue); }

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* 安装向导风按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 24px; border-radius: 2px; font-weight: 600; font-size: 15px;
    cursor: pointer; transition: 0.2s; border: 1px solid transparent;
}
.btn-primary { background: var(--win-blue); color: #fff; border-color: var(--win-blue); }
.btn-primary:hover { background: var(--win-blue-hover); }
.btn-outline { background: var(--win-white); color: var(--win-text); border-color: #8A8886; }
.btn-outline:hover { background: #F3F2F1; }
.btn-dl-icon::before { content: '⬇️'; font-size: 16px; }

/* 模拟安装向导窗口 */
.wizard-box {
    background: var(--win-white);
    border: 1px solid var(--win-border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin: 40px auto;
    max-width: 900px;
}
.wizard-header {
    background: var(--win-white);
    padding: 15px 20px;
    border-bottom: 1px solid var(--win-border);
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; font-weight: 600; color: var(--win-text);
}
.wizard-header img { width: 16px; height: 16px; }
.wizard-body { padding: 40px; }
.wizard-footer {
    background: #F3F2F1;
    padding: 15px 20px;
    border-top: 1px solid var(--win-border);
    display: flex; justify-content: flex-end; gap: 10px;
}

/* 首屏区域 */
.hero-content { display: flex; align-items: flex-start; gap: 40px; }
.file-icon-large { width: 80px; height: 80px; margin-bottom: 20px; background: url('favicon.ico') center/contain no-repeat; position: relative; }
.file-icon-large::after { content: '.exe'; position: absolute; bottom: -5px; right: -10px; background: var(--win-blue); color: #fff; font-size: 12px; padding: 2px 6px; border-radius: 2px; font-weight: bold; }
.hero-text h1 { font-size: 32px; font-weight: 600; margin-bottom: 10px; color: var(--win-blue); }
.hero-subtitle { font-size: 18px; color: var(--win-muted); margin-bottom: 20px; }
.hero-desc { font-size: 14px; color: var(--win-text); margin-bottom: 30px; line-height: 1.8; background: #FDFDFD; border: 1px solid #EDEBE9; padding: 15px; }
.hero-visual { flex: 1; border: 1px solid var(--win-border); padding: 5px; background: #fff; }

/* 安装进度/核心卖点 */
.install-steps-title { font-size: 20px; font-weight: 600; margin: 40px 0 20px; border-bottom: 2px solid var(--win-blue); padding-bottom: 10px; display: inline-block; }
.step-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 15px; margin-bottom: 40px; }
.step-card { text-align: center; background: #fff; border: 1px dashed var(--win-border); padding: 20px 10px; }
.step-card img { width: 40px; height: 40px; margin: 0 auto 10px; }
.step-card h3 { font-size: 14px; font-weight: 600; margin-bottom: 5px; }
.step-card p { font-size: 12px; color: var(--win-muted); }

/* 功能详情 (教程步骤风) */
.tutorial-list { display: flex; flex-direction: column; gap: 30px; }
.tutorial-item { display: flex; gap: 30px; background: #fff; border: 1px solid var(--win-border); padding: 20px; align-items: center; position: relative; }
.step-badge { position: absolute; top: -15px; left: -15px; background: var(--win-blue); color: #fff; width: 30px; height: 30px; display: flex; justify-content: center; align-items: center; font-weight: bold; border-radius: 50%; border: 3px solid #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
.tut-text { flex: 1; }
.tut-text h3 { font-size: 20px; color: var(--win-blue); margin-bottom: 10px; }
.tut-text p { font-size: 14px; margin-bottom: 15px; color: var(--win-muted); }
.tut-data { display: inline-block; background: #E1DFDD; padding: 4px 8px; font-size: 12px; font-weight: 600; font-family: monospace; }
.tut-img { flex: 1; border: 1px solid var(--win-border); }

/* 对比区域 */
.compare-section { margin-top: 40px; }
.compare-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--win-border); }
.compare-table th, .compare-table td { padding: 15px; border-bottom: 1px solid var(--win-border); border-right: 1px solid var(--win-border); text-align: left; font-size: 14px; }
.compare-table th { background: #F3F2F1; font-weight: 600; }
.compare-table .hl { color: var(--win-success); font-weight: bold; background: #F2FAF5; }

/* 下载版本列表 (文件列表风) */
.file-list { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.file-item { display: flex; justify-content: space-between; align-items: center; background: #fff; border: 1px solid var(--win-border); padding: 15px 20px; transition: 0.2s; }
.file-item:hover { background: #F3F2F1; }
.file-info { display: flex; align-items: center; gap: 15px; }
.file-icon { font-size: 24px; }
.file-details h3 { font-size: 16px; font-weight: 600; color: var(--win-text); margin-bottom: 4px; }
.file-details p { font-size: 13px; color: var(--win-muted); }
.file-size { font-size: 12px; color: #8A8886; font-family: monospace; width: 80px; text-align: right; margin-right: 20px; }

/* 数据展示 */
.install-stats { display: flex; justify-content: space-around; background: var(--win-blue); color: #fff; padding: 30px; margin-top: 40px; }
.stat-box { text-align: center; }
.stat-box h4 { font-size: 32px; font-weight: bold; margin-bottom: 5px; }
.stat-box p { font-size: 14px; opacity: 0.9; }

/* FAQ */
.faq-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.faq-box { background: #fff; border: 1px solid var(--win-border); padding: 20px; }
.faq-box h4 { font-size: 15px; color: var(--win-blue); margin-bottom: 10px; display: flex; align-items: flex-start; gap: 5px; }
.faq-box h4::before { content: '❓'; }
.faq-box p { font-size: 13px; color: var(--win-muted); line-height: 1.6; padding-left: 20px; }

footer { text-align: center; padding: 20px; color: var(--win-muted); font-size: 12px; margin-top: 40px; }