:root {
    --bg-pure: #FAFAFA; /* 极简白灰背景 */
    --text-main: #111111;
    --text-muted: #666666;
    --text-light: #999999;
    --accent-green: #00B14F; /* 官方绿 */
    --accent-green-hover: #009643;
    --border-color: #EAEAEA;
    --shadow-soft: 0 10px 40px rgba(0,0,0,0.04);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; background-color: var(--bg-pure); color: var(--text-main); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
img { max-width: 100%; display: block; border-radius: 8px; }
ul { list-style: none; }

/* 极简导航 */
.header { position: absolute; top: 0; width: 100%; z-index: 1000; padding: 20px 0; }
.nav-wrap { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 20px; }
.logo { font-size: 18px; font-weight: 700; color: var(--text-main); display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
.logo img { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-muted); }
.nav-links a:hover, .nav-links a.active { color: var(--text-main); }

.container { max-width: 1000px; margin: 0 auto; padding: 100px 20px 60px; }

/* 极简按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 16px 48px; border-radius: 4px; font-size: 18px; font-weight: 600; cursor: pointer; transition: 0.3s; letter-spacing: 1px; }
.btn-primary { background: var(--accent-green); color: #FFF; border: none; box-shadow: 0 4px 15px rgba(0, 177, 79, 0.2); }
.btn-primary:hover { background: var(--accent-green-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 177, 79, 0.3); }
.btn-outline { background: transparent; color: var(--text-muted); border: 1px solid #CCC; padding: 16px 32px; font-size: 15px; }
.btn-outline:hover { color: var(--text-main); border-color: var(--text-main); }

/* 首屏 Hero 区 - 极度克制 */
.hero { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 85vh; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-content { margin-bottom: 50px; }
.hero-content h1 { font-size: 56px; font-weight: 800; color: var(--text-main); margin-bottom: 20px; letter-spacing: -2px; line-height: 1.1; }
.hero-content .subtitle { font-size: 20px; color: var(--text-muted); margin-bottom: 40px; font-weight: 400; }
.hero-btns { display: flex; flex-direction: column; align-items: center; gap: 15px; margin-bottom: 40px; }
.hero-desc { font-size: 13px; color: var(--text-light); }
.hero-visual { width: 100%; max-width: 800px; position: relative; }
.hero-visual img { width: 100%; border-radius: 12px; box-shadow: var(--shadow-soft); border: 1px solid var(--border-color); }

/* 极简分隔线 */
.divider { height: 1px; background: var(--border-color); width: 100px; margin: 80px auto; }

/* 核心卖点 - 留白排版 */
.feature-grid { display: flex; justify-content: space-between; gap: 20px; text-align: center; margin-bottom: 100px; }
.f-box { flex: 1; }
.f-box img { width: 32px; height: 32px; margin: 0 auto 15px; filter: grayscale(1) opacity(0.7); transition: 0.3s; }
.f-box:hover img { filter: grayscale(0) opacity(1); }
.f-box h3 { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; }
.f-box p { font-size: 13px; color: var(--text-muted); }

/* 极简功能详情 */
.detail-box { display: flex; align-items: center; gap: 80px; margin-bottom: 100px; }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 700; letter-spacing: -1px; margin-bottom: 20px; color: var(--text-main); }
.d-text p { font-size: 16px; color: var(--text-muted); line-height: 1.8; margin-bottom: 30px; }
.d-data { font-size: 14px; font-weight: 600; color: var(--accent-green); letter-spacing: 1px; }
.d-visual { flex: 1; }
.d-visual img { box-shadow: var(--shadow-soft); }

/* 浏览器对比 - 极简表格 */
.sec-title { text-align: center; font-size: 24px; font-weight: 700; margin-bottom: 40px; color: var(--text-main); letter-spacing: -0.5px; }
.compare-box { margin-bottom: 100px; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px 0; border-bottom: 1px solid var(--border-color); }
.compare-table th { color: var(--text-light); font-size: 13px; font-weight: 500; }
.compare-table td { font-size: 15px; color: var(--text-muted); }
.compare-table .hl { color: var(--text-main); font-weight: 600; }
.compare-table tr:last-child td { border-bottom: none; }

/* 下载版本区 - 极简卡片 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 100px; }
.dl-card { padding: 40px 30px; text-align: center; border: 1px solid var(--border-color); border-radius: 8px; transition: 0.3s; background: #FFF; }
.dl-card:hover { border-color: #CCC; box-shadow: var(--shadow-soft); }
.dl-card.rec { border-color: var(--text-main); }
.dl-card h3 { font-size: 20px; font-weight: 700; color: var(--text-main); margin-bottom: 15px; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 42px; }
.dl-card .btn { width: 100%; padding: 12px 0; font-size: 15px; }

/* 数据背书 - 极简数字 */
.data-sec { display: flex; justify-content: center; gap: 100px; margin-bottom: 100px; text-align: center; }
.data-item h4 { font-size: 40px; font-weight: 700; color: var(--text-main); margin-bottom: 5px; letter-spacing: -1px; }
.data-item p { font-size: 13px; color: var(--text-muted); }

/* FAQ - 极简列表 */
.faq-grid { max-width: 700px; margin: 0 auto; }
.faq-box { padding: 25px 0; border-bottom: 1px solid var(--border-color); }
.faq-box:last-child { border-bottom: none; }
.faq-box h4 { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 10px; }
.faq-box p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }

/* Footer */
.footer { text-align: center; padding: 40px 20px; color: var(--text-light); font-size: 13px; border-top: 1px solid var(--border-color); }