:root {
    --bg-warm: #FFF8F1; /* 暖橙色背景 */
    --bg-white: #FFFFFF;
    --primary-color: #FF6B4A; /* 活力暖橙 */
    --primary-hover: #E85535;
    --accent-blue: #4A90E2; /* 友好蓝 */
    --accent-green: #34C759; /* 安心绿 */
    --text-title: #333333;
    --text-body: #666666;
    --text-light: #999999;
    --border-color: #F0E6DD;
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-soft: 0 10px 30px rgba(255, 107, 74, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Comic Sans MS", sans-serif; background-color: var(--bg-warm); color: var(--text-body); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; border-radius: var(--radius-md); }
ul { list-style: none; }

/* 导航 */
.header { background: rgba(255, 255, 255, 0.95); box-shadow: 0 2px 15px rgba(0,0,0,0.03); position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(8px); }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 75px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: bold; color: var(--primary-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: 500; color: var(--text-title); position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--primary-color); }
.nav-links a::after { content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); width: 0; height: 3px; background: var(--primary-color); border-radius: 3px; transition: 0.3s; }
.nav-links a:hover::after, .nav-links a.active::after { width: 20px; }

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

/* 圆润友好的按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px; border-radius: 30px; font-size: 18px; font-weight: bold; cursor: pointer; transition: 0.3s; box-shadow: 0 4px 10px rgba(0,0,0,0.05); }
.btn-primary { background: linear-gradient(135deg, #FF8D6B, var(--primary-color)); color: #FFF; border: none; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(255, 107, 74, 0.3); }
.btn-outline { background: #FFF; color: var(--primary-color); border: 2px solid var(--primary-color); }
.btn-outline:hover { background: #FFF5F2; transform: translateY(-3px); }

/* 首屏 Hero 区 */
.hero { display: flex; align-items: center; gap: 50px; padding: 60px 20px 80px; max-width: 1200px; margin: 0 auto; }
.hero-content { flex: 1.1; }
.family-tag { display: inline-block; background: #FFE8E0; color: var(--primary-color); padding: 6px 16px; border-radius: 20px; font-size: 14px; font-weight: bold; margin-bottom: 20px; }
.hero-content h1 { font-size: 48px; font-weight: 900; color: var(--text-title); margin-bottom: 15px; line-height: 1.2; }
.hero-content .subtitle { font-size: 22px; color: var(--accent-blue); font-weight: bold; margin-bottom: 25px; }
.hero-content .desc { font-size: 16px; color: var(--text-body); margin-bottom: 40px; line-height: 1.8; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1; position: relative; }
.hero-visual img { border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 8px solid #FFF; transform: rotate(2deg); transition: 0.4s; }
.hero-visual:hover img { transform: rotate(0deg) scale(1.02); }

/* 模块标题 */
.sec-title { text-align: center; font-size: 36px; font-weight: 800; color: var(--text-title); margin-bottom: 50px; }
.sec-title span { color: var(--primary-color); position: relative; }
.sec-title span::after { content: ''; position: absolute; bottom: 2px; left: 0; width: 100%; height: 8px; background: rgba(255, 107, 74, 0.2); z-index: -1; border-radius: 4px; }

/* 核心卖点 - 场景化 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { background: var(--bg-white); padding: 30px 20px; text-align: center; border-radius: var(--radius-lg); box-shadow: 0 4px 15px rgba(0,0,0,0.03); transition: 0.3s; border: 2px solid transparent; }
.f-box:hover { transform: translateY(-5px); border-color: #FFE8E0; box-shadow: var(--shadow-soft); }
.f-box img { width: 56px; height: 56px; margin: 0 auto 15px; }
.f-box h3 { font-size: 18px; font-weight: bold; color: var(--text-title); margin-bottom: 8px; }
.f-box p { font-size: 14px; color: var(--text-light); }

/* 功能详情 - 贴近家庭痛点 */
.detail-box { display: flex; align-items: center; gap: 50px; margin-bottom: 60px; background: var(--bg-white); padding: 40px; border-radius: var(--radius-lg); box-shadow: 0 4px 20px rgba(0,0,0,0.02); }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 28px; font-weight: 800; color: var(--text-title); margin-bottom: 20px; display: flex; align-items: center; gap: 12px; }
.d-text p { font-size: 16px; color: var(--text-body); margin-bottom: 24px; line-height: 1.8; }
.d-data { display: inline-block; padding: 8px 20px; background: #F0F7FF; color: var(--accent-blue); font-weight: bold; border-radius: 20px; font-size: 15px; }
.d-visual { flex: 1.2; }
.d-visual img { border-radius: var(--radius-md); box-shadow: 0 8px 25px rgba(0,0,0,0.06); }

/* 浏览器对比 - 简单直白 */
.compare-box { background: var(--bg-white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-soft); }
.compare-table { width: 100%; border-collapse: collapse; text-align: center; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px dashed var(--border-color); }
.compare-table th { color: var(--text-light); font-size: 16px; font-weight: normal; }
.compare-table .hl-col { background: #FFF5F2; border-radius: 12px; font-weight: bold; color: var(--text-title); }
.compare-table .hl-head { color: var(--primary-color); font-size: 20px; font-weight: 900; }
.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-card { background: var(--bg-white); padding: 40px 30px; text-align: center; border-radius: var(--radius-lg); transition: 0.3s; box-shadow: 0 4px 15px rgba(0,0,0,0.03); border: 2px solid transparent; }
.dl-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-soft); }
.dl-card.rec { border-color: var(--primary-color); position: relative; }
.dl-card.rec::before { content: '家庭必备'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--primary-color); color: #FFF; padding: 4px 16px; border-radius: 20px; font-size: 14px; font-weight: bold; box-shadow: 0 4px 10px rgba(255,107,74,0.3); }
.dl-card h3 { font-size: 24px; font-weight: 800; color: var(--text-title); margin-bottom: 15px; }
.dl-card p { font-size: 15px; color: var(--text-light); margin-bottom: 30px; height: 65px; line-height: 1.6; }
.dl-card .btn { width: 100%; }

/* 数据背书 */
.data-sec { background: var(--primary-color); padding: 60px 20px; color: #FFF; text-align: center; margin: 60px 0; border-radius: 40px 40px 0 0; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; }
.data-item h4 { font-size: 54px; font-weight: 900; margin-bottom: 5px; font-family: 'Comic Sans MS', sans-serif; }
.data-item p { font-size: 18px; font-weight: 600; opacity: 0.9; }

/* FAQ - 贴心问答 */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.faq-box { background: var(--bg-white); padding: 25px 30px; border-radius: var(--radius-md); box-shadow: 0 2px 10px rgba(0,0,0,0.02); border-left: 4px solid var(--primary-color); }
.faq-box h4 { font-size: 18px; font-weight: bold; color: var(--text-title); margin-bottom: 12px; }
.faq-box p { font-size: 15px; color: var(--text-body); line-height: 1.6; }

/* Footer */
.footer { background: #333333; color: #999999; text-align: center; padding: 40px 20px; font-size: 14px; }