:root {
    --brand-color: #00B050; /* 360绿 */
    --brand-dark: #008a3e;
    --brand-yellow: #FFB800; /* 高转化强调色 */
    --text-main: #222222;
    --text-muted: #666666;
    --bg-light: #F8F9FB;
    --bg-white: #FFFFFF;
    --border-color: #EEEEEE;
    --shadow-main: 0 10px 30px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
    color: var(--text-main); 
    background-color: var(--bg-white);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; border-radius: 8px; }

/* 导航 */
.header { background: var(--bg-white); box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.nav-container { 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: 800; color: var(--text-main); display: flex; align-items: center; gap: 8px; }
.logo img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 16px; font-weight: 600; color: var(--text-muted); }
.nav-links a:hover, .nav-links a.active { color: var(--brand-color); }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 16px 36px; border-radius: 50px; font-weight: 700; font-size: 18px;
    cursor: pointer; transition: 0.3s; border: none; text-transform: uppercase;
}
.btn-primary { background: var(--brand-color); color: #fff; box-shadow: 0 8px 20px rgba(0,176,80,0.3); }
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 10px 25px rgba(0,176,80,0.4); }
.btn-secondary { background: var(--brand-yellow); color: #000; box-shadow: 0 8px 20px rgba(255,184,0,0.3); }
.btn-secondary:hover { background: #E6A600; transform: translateY(-2px); }

/* 广告风首屏 Hero 区 */
.hero { 
    background: radial-gradient(circle at center top, #F0FDF4 0%, #E0F2FE 100%);
    padding: 80px 0 0; text-align: center; overflow: hidden;
}
.hero-content { max-width: 900px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 10; }
.hero-badge { display: inline-block; background: #fff; color: var(--brand-color); font-weight: 800; padding: 6px 16px; border-radius: 20px; margin-bottom: 20px; box-shadow: 0 4px 10px rgba(0,0,0,0.05); }
.hero-title { font-size: 64px; font-weight: 900; line-height: 1.1; margin-bottom: 20px; letter-spacing: -1px; }
.hero-subtitle { font-size: 26px; font-weight: 700; color: var(--brand-color); margin-bottom: 30px; }
.hero-selling-points { display: flex; justify-content: center; gap: 20px; margin-bottom: 40px; font-size: 16px; font-weight: 600; color: var(--text-muted); }
.hero-selling-points span::before { content: '✓'; color: var(--brand-color); font-weight: bold; margin-right: 5px; }
.hero-btns { display: flex; justify-content: center; gap: 20px; margin-bottom: 60px; }
.hero-img-box { max-width: 1000px; margin: 0 auto -100px; position: relative; z-index: 20; }
.hero-img-box img { box-shadow: 0 20px 50px rgba(0,0,0,0.15); border-radius: 12px 12px 0 0; border: 1px solid rgba(0,0,0,0.05); border-bottom: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; }
.section-gray { background-color: var(--bg-light); }
.sec-title { font-size: 38px; font-weight: 800; text-align: center; margin-bottom: 20px; }
.sec-desc { font-size: 18px; text-align: center; color: var(--text-muted); margin-bottom: 60px; max-width: 700px; margin-inline: auto; }

/* 核心卖点区 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; margin-top: 140px; }
.f-card { background: var(--bg-white); padding: 30px 20px; border-radius: 12px; text-align: center; box-shadow: var(--shadow-main); border: 1px solid var(--border-color); transition: 0.3s; }
.f-card:hover { transform: translateY(-5px); border-color: var(--brand-color); }
.f-card img { width: 50px; height: 50px; margin: 0 auto 20px; }
.f-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; }
.f-card p { font-size: 14px; color: var(--text-muted); }

/* 功能详情区 */
.detail-modules { display: flex; flex-direction: column; gap: 80px; }
.detail-row { display: flex; align-items: center; gap: 60px; }
.detail-row:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-tag { display: inline-block; background: #E0F2FE; color: #0284C7; font-size: 14px; font-weight: 700; padding: 4px 12px; border-radius: 4px; margin-bottom: 15px; }
.d-text h3 { font-size: 32px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; line-height: 1.8; }
.d-data { background: var(--bg-light); padding: 15px 20px; border-left: 4px solid var(--brand-color); font-size: 16px; font-weight: 700; border-radius: 0 8px 8px 0; }
.d-img { flex: 1; }
.d-img img { box-shadow: var(--shadow-main); }

/* 浏览器对比 */
.compare-wrapper { background: var(--bg-white); border-radius: 16px; box-shadow: var(--shadow-main); overflow: hidden; border: 1px solid var(--border-color); }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px 30px; border-bottom: 1px solid var(--border-color); }
.compare-table th { background: var(--bg-light); font-size: 15px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
.compare-table td { font-size: 16px; font-weight: 500; }
.compare-table .hl { color: var(--brand-color); font-weight: 800; background: #F0FDF4; }

/* 下载版本区 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 16px; padding: 40px 30px; text-align: center; transition: 0.3s; }
.dl-card:hover { box-shadow: var(--shadow-main); border-color: var(--brand-color); }
.dl-card.rec { position: relative; border: 2px solid var(--brand-color); box-shadow: 0 10px 30px rgba(0,176,80,0.1); }
.dl-card.rec::before { content: '官方推荐'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--brand-color); color: #fff; font-size: 13px; font-weight: 800; padding: 4px 16px; border-radius: 20px; }
.dl-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 15px; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 42px; }
.dl-card .btn { width: 100%; }

/* 数据背书区 */
.data-sec { background: #0F172A; color: #fff; padding: 80px 0; border-radius: 20px; margin: 40px 0; text-align: center; }
.data-flex { display: flex; justify-content: space-around; max-width: 1000px; margin: 0 auto; }
.data-item h4 { font-size: 56px; font-weight: 900; color: var(--brand-color); margin-bottom: 10px; }
.data-item p { font-size: 18px; font-weight: 500; }

/* FAQ 区 */
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 1000px; margin: 0 auto; }
.faq-box { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: 12px; padding: 25px; transition: 0.3s; }
.faq-box:hover { box-shadow: var(--shadow-main); }
.faq-box h4 { font-size: 18px; font-weight: 800; margin-bottom: 12px; display: flex; align-items: flex-start; gap: 8px; }
.faq-box h4::before { content: 'Q:'; color: var(--brand-color); }
.faq-box p { font-size: 15px; color: var(--text-muted); line-height: 1.6; padding-left: 28px; }

footer { background: #0F172A; color: #94A3B8; text-align: center; padding: 40px 0; font-size: 14px; }