:root {
    --brand-color: #00B150; /* 转化率极高的鲜艳绿 */
    --brand-hover: #009643;
    --cta-color: #FF5A00; /* 高转化橙色按钮 */
    --cta-hover: #E04E00;
    --text-main: #222222;
    --text-muted: #666666;
    --bg-page: #F5F7FA;
    --bg-card: #FFFFFF;
    --border-color: #EAEAEA;
    --shadow-card: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-btn: 0 6px 20px rgba(255, 90, 0, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", -apple-system, sans-serif; color: var(--text-main); background: var(--bg-page); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.2s ease; }
img { max-width: 100%; border-radius: 6px; }
ul { list-style: none; }

/* 导航 */
.header { background: var(--bg-card); box-shadow: 0 2px 10px rgba(0,0,0,0.05); 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: 72px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: bold; color: var(--brand-color); display: flex; align-items: center; gap: 10px; }
.logo img { width: 36px; height: 36px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 16px; font-weight: bold; color: var(--text-main); }
.nav-links a:hover, .nav-links a.active { color: var(--brand-color); }

.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; }

/* 强转化大按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0 40px; height: 56px; border-radius: 28px; font-size: 20px; font-weight: 900; cursor: pointer; transition: 0.3s; letter-spacing: 1px; }
.btn-cta { background: var(--cta-color); color: #fff; box-shadow: var(--shadow-btn); border: 2px solid var(--cta-color); animation: pulse 2s infinite; }
.btn-cta:hover { background: var(--cta-hover); border-color: var(--cta-hover); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255, 90, 0, 0.4); animation: none; }
.btn-primary { background: var(--brand-color); color: #fff; box-shadow: 0 6px 20px rgba(0, 177, 80, 0.2); }
.btn-primary:hover { background: var(--brand-hover); transform: translateY(-2px); }
.btn-outline { background: #fff; color: var(--brand-color); border: 2px solid var(--brand-color); }
.btn-outline:hover { background: #F0FDF5; }

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 90, 0, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(255, 90, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 90, 0, 0); }
}

/* 首屏强引导区 */
.hero { background: var(--bg-card); padding: 80px 20px; text-align: center; border-bottom: 1px solid var(--border-color); }
.hero-content { max-width: 800px; margin: 0 auto; }
.hero-content h1 { font-size: 48px; font-weight: 900; color: var(--text-main); margin-bottom: 15px; }
.hero-content .subtitle { font-size: 26px; color: var(--brand-color); font-weight: bold; margin-bottom: 25px; }
.hero-content .desc { font-size: 18px; color: var(--text-muted); margin-bottom: 40px; }
.hero-btns { display: flex; justify-content: center; gap: 20px; margin-bottom: 50px; }
.hero-visual { max-width: 900px; margin: 0 auto; }
.hero-visual img { box-shadow: 0 15px 40px rgba(0,0,0,0.1); border: 1px solid var(--border-color); border-radius: 12px; }

/* 模块标题 */
.sec-title { text-align: center; font-size: 36px; font-weight: 900; margin-bottom: 50px; color: var(--text-main); position: relative; }
.sec-title::after { content: ''; display: block; width: 80px; height: 4px; background: var(--brand-color); margin: 15px auto 0; border-radius: 2px; }

/* 功能卖点三栏 */
.feature-3col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 80px; }
.f3-card { background: var(--bg-card); border-radius: 12px; padding: 40px 25px; text-align: center; border: 1px solid var(--border-color); box-shadow: var(--shadow-card); transition: 0.3s; }
.f3-card:hover { transform: translateY(-5px); border-color: var(--brand-color); box-shadow: 0 10px 25px rgba(0, 177, 80, 0.1); }
.f3-card img { width: 64px; height: 64px; margin: 0 auto 20px; }
.f3-card h3 { font-size: 22px; font-weight: bold; margin-bottom: 15px; color: var(--text-main); }
.f3-card p { font-size: 15px; color: var(--text-muted); }

/* 功能详情 */
.detail-box { display: flex; align-items: center; gap: 50px; background: var(--bg-card); padding: 50px; border-radius: 12px; margin-bottom: 40px; box-shadow: var(--shadow-card); }
.detail-box:nth-child(odd) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 30px; font-weight: 800; margin-bottom: 20px; color: var(--text-main); }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 25px; line-height: 1.8; }
.d-data { display: inline-block; padding: 10px 20px; background: #FFF4E5; color: #FF5A00; font-weight: bold; border-radius: 6px; font-size: 16px; border: 1px solid #FFE0B2; }
.d-visual { flex: 1; text-align: center; }
.d-visual img { border: 1px solid var(--border-color); box-shadow: var(--shadow-card); border-radius: 8px; }

/* 浏览器对比 */
.compare-box { background: var(--bg-card); border-radius: 12px; box-shadow: var(--shadow-card); overflow: hidden; padding: 20px; }
.compare-table { width: 100%; border-collapse: collapse; text-align: center; }
.compare-table th, .compare-table td { padding: 18px; border-bottom: 1px solid var(--border-color); }
.compare-table th { font-size: 16px; font-weight: bold; color: var(--text-muted); background: #FAFAFA; }
.compare-table .hl { background: #F0FDF5; color: var(--brand-color); font-weight: 900; font-size: 18px; border-left: 2px solid var(--brand-color); border-right: 2px solid var(--brand-color); }
.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: 30px; }
.dl-item { background: var(--bg-card); border: 2px solid var(--border-color); border-radius: 12px; padding: 50px 30px; text-align: center; transition: 0.3s; position: relative; }
.dl-item:hover { border-color: var(--brand-color); box-shadow: var(--shadow-card); }
.dl-item.rec { border-color: var(--cta-color); box-shadow: var(--shadow-btn); }
.dl-item.rec::before { content: '首选下载'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--cta-color); color: #fff; padding: 4px 16px; border-radius: 20px; font-weight: bold; font-size: 14px; }
.dl-item h3 { font-size: 24px; font-weight: bold; margin-bottom: 15px; }
.dl-item p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 45px; }
.dl-item .btn { width: 100%; }

/* 数据背书 */
.data-banner { display: flex; justify-content: space-around; padding: 50px; background: var(--brand-color); border-radius: 12px; margin: 80px 0; color: #fff; box-shadow: 0 10px 30px rgba(0,177,80,0.3); }
.data-item { text-align: center; }
.data-item h4 { font-size: 48px; font-weight: 900; margin-bottom: 10px; }
.data-item p { font-size: 16px; font-weight: bold; }

/* FAQ */
.faq-grid { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: 1fr; gap: 20px; }
.faq-box { background: var(--bg-card); border: 1px solid var(--border-color); border-left: 5px solid var(--brand-color); padding: 25px 30px; border-radius: 8px; box-shadow: var(--shadow-card); }
.faq-box h4 { font-size: 18px; font-weight: bold; color: var(--text-main); margin-bottom: 12px; }
.faq-box p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }

/* Footer */
.footer { text-align: center; padding: 40px; color: var(--text-muted); background: #EAEAEA; font-size: 14px; margin-top: 60px; }