:root {
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --brand-green: #00B14F; /* 商务绿 */
    --brand-green-hover: #009643;
    --text-dark: #212529;
    --text-body: #495057;
    --text-muted: #6C757D;
    --border-color: #E9ECEF;
    --primary-font: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--primary-font); background-color: var(--bg-white); color: var(--text-body); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: all 0.2s ease-in-out; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* 导航 */
.header { background: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; padding: 0 20px; }
.logo { font-size: 22px; font-weight: 700; color: var(--text-dark); display: flex; align-items: center; gap: 10px; }
.logo img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 40px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--text-muted); padding: 24px 0; border-bottom: 3px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--brand-green); border-bottom-color: var(--brand-green); }

.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.bg-light-sec { background-color: var(--bg-light); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }

/* 扁平按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 32px; font-size: 16px; font-weight: 600; cursor: pointer; border-radius: 2px; text-align: center; }
.btn-primary { background-color: var(--brand-green); color: #fff; border: 1px solid var(--brand-green); }
.btn-primary:hover { background-color: var(--brand-green-hover); border-color: var(--brand-green-hover); }
.btn-outline { background-color: transparent; color: var(--text-dark); border: 1px solid var(--text-muted); }
.btn-outline:hover { background-color: var(--bg-light); border-color: var(--text-dark); color: var(--text-dark); }

/* 首屏 Hero 区 */
.hero { display: flex; align-items: center; gap: 50px; padding: 100px 20px; max-width: 1200px; margin: 0 auto; }
.hero-content { flex: 1; }
.hero-content .label { display: inline-block; background: var(--bg-light); color: var(--text-muted); border: 1px solid var(--border-color); padding: 4px 12px; font-size: 13px; font-weight: 600; letter-spacing: 1px; margin-bottom: 20px; border-radius: 2px; }
.hero-content h1 { font-size: 48px; font-weight: 700; color: var(--text-dark); line-height: 1.2; margin-bottom: 16px; letter-spacing: -1px; }
.hero-content .subtitle { font-size: 24px; color: var(--brand-green); font-weight: 600; margin-bottom: 24px; }
.hero-content .desc { font-size: 16px; color: var(--text-muted); margin-bottom: 40px; line-height: 1.7; max-width: 480px; }
.hero-btns { display: flex; gap: 16px; }
.hero-visual { flex: 1.2; }
.hero-visual img { border: 1px solid var(--border-color); box-shadow: 0 4px 12px rgba(0,0,0,0.05); border-radius: 4px; }

/* 模块标题 */
.sec-title { text-align: center; font-size: 32px; font-weight: 700; color: var(--text-dark); margin-bottom: 60px; }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { text-align: center; padding: 30px 20px; background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 2px; transition: transform 0.2s; }
.f-box:hover { transform: translateY(-3px); box-shadow: 0 4px 12px rgba(0,0,0,0.05); border-color: var(--brand-green); }
.f-box img { width: 48px; height: 48px; margin: 0 auto 20px; }
.f-box h3 { font-size: 17px; font-weight: 600; color: var(--text-dark); margin-bottom: 10px; }
.f-box p { font-size: 14px; color: var(--text-muted); }

/* 功能详情 */
.detail-row { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
.detail-row:last-child { margin-bottom: 0; }
.detail-row:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 28px; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; }
.d-text p { font-size: 16px; color: var(--text-body); margin-bottom: 24px; line-height: 1.8; }
.d-data-point { display: inline-block; padding: 8px 16px; background: var(--bg-light); border-left: 4px solid var(--brand-green); font-size: 15px; font-weight: 600; color: var(--text-dark); }
.d-visual { flex: 1; }
.d-visual img { border: 1px solid var(--border-color); border-radius: 4px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }

/* 浏览器对比 */
.compare-box { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 4px; overflow: hidden; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 18px 24px; border-bottom: 1px solid var(--border-color); }
.compare-table th { background: var(--bg-light); color: var(--text-dark); font-size: 15px; font-weight: 600; }
.compare-table td { font-size: 15px; color: var(--text-body); }
.compare-table .hl { color: var(--brand-green); font-weight: 600; background: rgba(0, 177, 79, 0.03); border-left: 1px solid rgba(0, 177, 79, 0.2); border-right: 1px solid rgba(0, 177, 79, 0.2); }
.compare-table tr:last-child td { border-bottom: none; }

/* 下载版本区 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.dl-card { background: var(--bg-white); border: 1px solid var(--border-color); padding: 40px 30px; border-radius: 2px; text-align: center; }
.dl-card:hover { border-color: var(--brand-green); }
.dl-card.featured { border: 2px solid var(--brand-green); position: relative; }
.dl-card.featured::before { content: '企业推荐'; position: absolute; top: 0; left: 50%; transform: translate(-50%, -50%); background: var(--brand-green); color: #fff; padding: 4px 12px; font-size: 12px; font-weight: 600; border-radius: 2px; }
.dl-card h3 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 42px; line-height: 1.5; }
.dl-card .btn { width: 100%; }

/* 数据背书 */
.data-banner { background: var(--brand-green); padding: 60px 20px; color: #fff; text-align: center; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; }
.data-item h4 { font-size: 42px; font-weight: 700; margin-bottom: 8px; font-family: Impact, sans-serif; }
.data-item p { font-size: 15px; opacity: 0.9; font-weight: 500; }

/* FAQ */
.faq-grid { max-width: 800px; margin: 0 auto; border-top: 1px solid var(--border-color); }
.faq-item { padding: 24px 0; border-bottom: 1px solid var(--border-color); }
.faq-item h4 { font-size: 16px; font-weight: 600; color: var(--text-dark); margin-bottom: 10px; display: flex; align-items: flex-start; gap: 10px; }
.faq-item h4::before { content: 'Q.'; color: var(--brand-green); font-weight: 700; }
.faq-item p { font-size: 14px; color: var(--text-muted); padding-left: 26px; line-height: 1.6; }

/* Footer */
.footer { background: #212529; color: #ADB5BD; padding: 40px 20px; text-align: center; font-size: 13px; }
.footer p { margin-bottom: 8px; }