:root {
    --primary: #0055FF;
    --primary-light: #4D8BFF;
    --secondary: #00C8FF;
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --bg-light: #F3F4F6;
    --bg-white: #FFFFFF;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; background-color: var(--bg-light); color: var(--text-dark); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
img { max-width: 100%; display: block; border-radius: 12px; }

/* 导航 */
.header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); box-shadow: 0 2px 15px 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; padding: 15px 20px; }
.logo { font-size: 24px; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 10px; }
.logo img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 16px; font-weight: 500; color: var(--text-gray); }
.nav-links a:hover, .nav-links a.active { color: var(--primary); font-weight: 600; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; border-radius: 30px; font-size: 16px; font-weight: bold; cursor: pointer; transition: 0.3s; box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--secondary)); color: #FFF; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0, 85, 255, 0.4); }
.btn-outline { background: var(--bg-white); color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #FFF; }

/* 容器与标题 */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.sec-title { text-align: center; font-size: 36px; font-weight: 800; color: var(--text-dark); margin-bottom: 15px; }
.sec-subtitle { text-align: center; font-size: 18px; color: var(--text-gray); margin-bottom: 50px; }

/* Hero区：流线型背景 */
.hero { text-align: center; padding: 120px 20px 80px; background: linear-gradient(135deg, #E6F0FF 0%, #FFFFFF 100%); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle, rgba(0,200,255,0.1) 0%, transparent 50%); animation: rotate 20s linear infinite; }
@keyframes rotate { 100% { transform: rotate(360deg); } }
.hero h1 { font-size: 56px; font-weight: 900; margin-bottom: 20px; color: var(--text-dark); position: relative; z-index: 1; }
.hero h1 span { background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero .subtitle { font-size: 22px; color: var(--text-gray); margin-bottom: 40px; position: relative; z-index: 1; }
.hero-btns { display: flex; justify-content: center; gap: 20px; margin-bottom: 60px; position: relative; z-index: 1; }
.hero-img { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; border-radius: 20px; box-shadow: 0 20px 50px rgba(0,0,0,0.15); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { background: var(--bg-white); padding: 30px 20px; border-radius: 16px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.03); transition: 0.3s; border: 1px solid #E5E7EB; }
.f-box:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0,85,255,0.1); border-color: var(--primary-light); }
.f-icon { width: 60px; height: 60px; margin: 0 auto 15px; }
.f-box h3 { font-size: 18px; font-weight: bold; margin-bottom: 10px; color: var(--text-dark); }
.f-box p { font-size: 14px; color: var(--text-gray); }

/* 功能详情 */
.detail-item { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; background: var(--bg-white); padding: 40px; border-radius: 24px; box-shadow: 0 10px 30px rgba(0,0,0,0.02); }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: bold; margin-bottom: 20px; color: var(--primary); }
.d-text p { font-size: 16px; color: var(--text-gray); margin-bottom: 30px; }
.d-data { display: inline-block; padding: 8px 16px; background: #E6F0FF; color: var(--primary); border-radius: 8px; font-weight: bold; }
.d-visual { flex: 1; }

/* 数据背书 */
.data-sec { background: linear-gradient(90deg, var(--primary), var(--secondary)); padding: 60px 0; color: #FFF; text-align: center; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; align-items: center; }
.data-item h4 { font-size: 48px; font-weight: 900; margin-bottom: 5px; }
.data-item p { font-size: 16px; opacity: 0.9; }

/* 浏览器对比 */
.compare-box { background: var(--bg-white); border-radius: 20px; padding: 40px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.compare-table { width: 100%; border-collapse: collapse; text-align: center; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid #E5E7EB; }
.compare-table th { font-weight: bold; color: var(--text-gray); font-size: 16px; }
.compare-table .hl { color: var(--primary); font-weight: bold; font-size: 18px; background: #F8FAFC; border-radius: 8px; }

/* 下载版本区 */
.dl-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { background: var(--bg-white); padding: 40px 30px; border-radius: 20px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.05); transition: 0.3s; }
.dl-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,85,255,0.1); }
.dl-card h3 { font-size: 24px; font-weight: bold; margin-bottom: 15px; color: var(--text-dark); }
.dl-card p { font-size: 15px; color: var(--text-gray); margin-bottom: 30px; height: 60px; }
.dl-card .btn { width: 100%; }

/* FAQ */
.faq-item { background: var(--bg-white); border-radius: 12px; padding: 25px; margin-bottom: 20px; box-shadow: 0 2px 10px rgba(0,0,0,0.02); border-left: 4px solid var(--primary); }
.faq-item h4 { font-size: 18px; font-weight: bold; color: var(--text-dark); margin-bottom: 10px; }
.faq-item p { font-size: 15px; color: var(--text-gray); }

/* Footer */
.footer { background: var(--text-dark); color: #9CA3AF; padding: 40px 20px; text-align: center; font-size: 14px; }