:root {
    --office-bg: #F3F5F9; /* 柔和办公灰 */
    --office-card: #FFFFFF;
    --office-primary: #1890FF; /* 效率蓝 */
    --office-primary-hover: #096DD9;
    --office-accent: #00B14F; /* 360绿辅助 */
    --text-title: #262626;
    --text-body: #595959;
    --text-light: #8C8C8C;
    --border-color: #E8E8E8;
    --shadow-base: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--office-bg); color: var(--text-body); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
img { max-width: 100%; display: block; border-radius: 4px; }
ul { list-style: none; }

/* 导航 */
.header { background: var(--office-card); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 1000; box-shadow: 0 1px 4px rgba(0,0,0,0.02); }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 64px; padding: 0 20px; }
.logo { font-size: 20px; font-weight: 600; color: var(--text-title); display: flex; align-items: center; gap: 8px; }
.logo img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-body); padding: 22px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--office-primary); border-bottom-color: var(--office-primary); }

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

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border-radius: 4px; font-size: 15px; font-weight: 500; cursor: pointer; transition: 0.3s; }
.btn-primary { background: var(--office-primary); color: #FFF; border: 1px solid var(--office-primary); box-shadow: 0 2px 0 rgba(0,0,0,0.045); }
.btn-primary:hover { background: var(--office-primary-hover); border-color: var(--office-primary-hover); }
.btn-outline { background: var(--office-card); color: var(--office-primary); border: 1px solid var(--office-primary); }
.btn-outline:hover { border-color: var(--office-primary-hover); color: var(--office-primary-hover); }

/* 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; }
.office-tag { display: inline-block; background: #E6F7FF; color: var(--office-primary); border: 1px solid #91D5FF; padding: 4px 12px; font-size: 12px; border-radius: 2px; margin-bottom: 16px; }
.hero-content h1 { font-size: 42px; font-weight: 600; color: var(--text-title); margin-bottom: 16px; line-height: 1.2; letter-spacing: -0.5px; }
.hero-content .subtitle { font-size: 20px; color: var(--office-accent); font-weight: 500; margin-bottom: 24px; }
.hero-content .desc { font-size: 15px; color: var(--text-light); margin-bottom: 40px; line-height: 1.8; max-width: 480px; }
.hero-btns { display: flex; gap: 16px; }
.hero-visual { flex: 1.2; position: relative; }
/* 多标签装饰元素 */
.hero-visual::before { content: '文档检索.pdf x'; position: absolute; top: -15px; left: 20px; background: #FFF; padding: 8px 16px; font-size: 12px; border-radius: 4px 4px 0 0; box-shadow: 0 -2px 5px rgba(0,0,0,0.05); color: var(--text-title); z-index: 1; }
.hero-visual::after { content: 'AI 财务摘要报告 x'; position: absolute; top: -15px; left: 140px; background: #F0F2F5; padding: 8px 16px; font-size: 12px; border-radius: 4px 4px 0 0; color: var(--text-light); z-index: 0; border: 1px solid var(--border-color); border-bottom: none; }
.hero-visual img { border-radius: 0 4px 4px 4px; box-shadow: var(--shadow-hover); border: 1px solid var(--border-color); position: relative; z-index: 2; }

/* 模块标题 */
.sec-title { text-align: center; font-size: 28px; font-weight: 600; color: var(--text-title); margin-bottom: 50px; }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { background: var(--office-card); padding: 24px 16px; text-align: center; border-radius: 4px; border: 1px solid var(--border-color); transition: 0.3s; }
.f-box:hover { box-shadow: var(--shadow-base); transform: translateY(-2px); border-color: var(--office-primary); }
.f-box img { width: 40px; height: 40px; margin: 0 auto 16px; }
.f-box h3 { font-size: 15px; font-weight: 500; color: var(--text-title); margin-bottom: 8px; }
.f-box p { font-size: 13px; color: var(--text-light); }

/* 功能详情 (文档检索与AI特色) */
.detail-box { background: var(--office-card); border: 1px solid var(--border-color); border-radius: 4px; padding: 40px; margin-bottom: 30px; display: flex; align-items: center; gap: 50px; }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 24px; font-weight: 600; color: var(--text-title); margin-bottom: 16px; }
.d-text p { font-size: 14px; color: var(--text-body); margin-bottom: 24px; line-height: 1.8; }
.d-data { display: inline-flex; align-items: center; padding: 6px 16px; background: #E6F7FF; color: var(--office-primary); font-size: 14px; font-weight: 500; border-radius: 2px; }
.d-visual { flex: 1; }
.d-visual img { border: 1px solid var(--border-color); box-shadow: var(--shadow-base); }

/* 浏览器对比 (企业效能对比) */
.compare-sec { background: var(--office-card); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); padding: 60px 0; margin: 60px 0; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 16px 20px; border-bottom: 1px solid var(--border-color); }
.compare-table th { background: #FAFAFA; color: var(--text-title); font-size: 14px; font-weight: 500; }
.compare-table td { font-size: 14px; color: var(--text-body); }
.compare-table .hl { color: var(--office-primary); font-weight: 500; background: #E6F7FF; border-left: 2px solid var(--office-primary); }
.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(--office-card); border: 1px solid var(--border-color); padding: 32px 24px; border-radius: 4px; transition: 0.3s; display: flex; flex-direction: column; }
.dl-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; }
.dl-card.rec { border-top: 3px solid var(--office-primary); }
.dl-card h3 { font-size: 18px; font-weight: 600; color: var(--text-title); margin-bottom: 12px; }
.dl-card p { font-size: 13px; color: var(--text-light); margin-bottom: 24px; line-height: 1.6; flex: 1; }
.dl-card .btn { width: 100%; }

/* 数据背书 */
.data-inner { max-width: 1000px; margin: 60px auto; display: flex; justify-content: space-around; background: var(--office-card); padding: 40px; border-radius: 4px; border: 1px solid var(--border-color); }
.data-item { text-align: center; border-right: 1px solid var(--border-color); flex: 1; }
.data-item:last-child { border-right: none; }
.data-item h4 { font-size: 32px; font-weight: 600; color: var(--office-primary); margin-bottom: 8px; }
.data-item p { font-size: 13px; color: var(--text-light); }

/* FAQ */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-box { background: var(--office-card); border: 1px solid var(--border-color); padding: 20px; border-radius: 4px; }
.faq-box h4 { font-size: 15px; font-weight: 500; color: var(--text-title); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.faq-box h4::before { content: ''; display: inline-block; width: 6px; height: 6px; background: var(--office-primary); border-radius: 50%; }
.faq-box p { font-size: 14px; color: var(--text-body); line-height: 1.6; padding-left: 14px; }

/* Footer */
.footer { background: #FAFAFA; border-top: 1px solid var(--border-color); text-align: center; padding: 40px 20px; color: var(--text-light); font-size: 13px; margin-top: 60px; }