:root {
    --bg-white: #FFFFFF;
    --bg-gray: #F8F9FA;
    --primary-color: #00B14F; /* 标志绿 */
    --primary-dark: #009643;
    --text-dark: #111111;
    --text-body: #4A4A4A;
    --text-muted: #888888;
    --shadow-heavy: 0 30px 60px rgba(0, 0, 0, 0.12);
}

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

/* 导航 - 悬浮透明 */
.header { position: absolute; top: 0; width: 100%; z-index: 1000; padding: 25px 0; background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, transparent 100%); }
.nav-wrap { max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 40px; }
.logo { font-size: 24px; font-weight: 800; color: var(--text-dark); display: flex; align-items: center; gap: 12px; letter-spacing: -0.5px; }
.logo img { width: 36px; height: 36px; }
.nav-links { display: flex; gap: 40px; }
.nav-links a { font-size: 16px; font-weight: 600; color: var(--text-dark); opacity: 0.8; }
.nav-links a:hover, .nav-links a.active { opacity: 1; color: var(--primary-color); }

/* 大按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 20px 48px; border-radius: 8px; font-size: 22px; font-weight: 800; cursor: pointer; transition: 0.3s; letter-spacing: 1px; }
.btn-primary { background: var(--primary-color); color: #FFF; box-shadow: 0 10px 30px rgba(0, 177, 79, 0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 15px 40px rgba(0, 177, 79, 0.4); }
.btn-outline { background: #FFF; color: var(--text-dark); border: 2px solid var(--text-dark); box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.btn-outline:hover { background: var(--text-dark); color: #FFF; transform: translateY(-3px); }

/* 全屏首屏 Hero */
.hero { height: 100vh; min-height: 900px; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; position: relative; padding-top: 100px; overflow: hidden; background: radial-gradient(circle at 50% 120%, #E8F5E9 0%, var(--bg-white) 70%); }
.hero-content { z-index: 2; margin-bottom: 60px; max-width: 1000px; padding: 0 20px; }
.hero-content h1 { font-size: 80px; font-weight: 900; color: var(--text-dark); margin-bottom: 20px; line-height: 1.1; letter-spacing: -2px; }
.hero-content .subtitle { font-size: 32px; color: var(--primary-color); font-weight: 700; margin-bottom: 40px; }
.hero-btns { display: flex; justify-content: center; gap: 30px; }
.hero-visual { width: 90%; max-width: 1400px; position: absolute; bottom: -10%; z-index: 1; transform: perspective(1000px) rotateX(10deg); transition: 1s ease-out; transform-origin: bottom center; }
.hero:hover .hero-visual { transform: perspective(1000px) rotateX(0deg) translateY(-20px); }
.hero-visual img { width: 100%; border-radius: 20px 20px 0 0; box-shadow: var(--shadow-heavy); border: 1px solid #EAEAEA; border-bottom: none; }

.container { max-width: 1400px; margin: 0 auto; padding: 120px 40px; }
.bg-gray { background-color: var(--bg-gray); }

/* 大标题 */
.sec-title { text-align: center; font-size: 48px; font-weight: 900; color: var(--text-dark); margin-bottom: 80px; letter-spacing: -1px; }

/* 核心卖点 - 大图标 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 30px; }
.f-box { text-align: center; padding: 40px 20px; transition: 0.3s; }
.f-box:hover { transform: translateY(-10px); }
.f-box img { width: 80px; height: 80px; margin: 0 auto 30px; }
.f-box h3 { font-size: 24px; font-weight: 800; color: var(--text-dark); margin-bottom: 15px; }
.f-box p { font-size: 16px; color: var(--text-muted); }

/* 功能详情 - 极简大幅图文 */
.detail-box { display: flex; align-items: center; gap: 100px; margin-bottom: 150px; }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 48px; font-weight: 900; color: var(--text-dark); margin-bottom: 30px; line-height: 1.2; letter-spacing: -1px; }
.d-text p { font-size: 20px; color: var(--text-body); margin-bottom: 40px; line-height: 1.8; }
.d-data { font-size: 32px; font-weight: 800; color: var(--primary-color); border-left: 6px solid var(--primary-color); padding-left: 20px; }
.d-visual { flex: 1.2; }
.d-visual img { border-radius: 16px; box-shadow: var(--shadow-heavy); }

/* 浏览器对比 */
.compare-box { background: var(--bg-white); border-radius: 24px; padding: 60px; box-shadow: var(--shadow-heavy); }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 30px 40px; border-bottom: 1px solid #EAEAEA; }
.compare-table th { color: var(--text-muted); font-size: 18px; font-weight: 600; }
.compare-table td { font-size: 18px; color: var(--text-body); }
.compare-table .hl { color: var(--primary-color); font-weight: 800; font-size: 20px; background: rgba(0, 177, 79, 0.05); }
.compare-table tr:last-child td { border-bottom: none; }

/* 数据背书 - 巨型数字 */
.data-sec { background: var(--text-dark); color: #FFF; padding: 120px 0; margin: 120px 0; }
.data-inner { max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-around; }
.data-item { text-align: center; }
.data-item h4 { font-size: 90px; font-weight: 900; color: var(--primary-color); margin-bottom: 10px; line-height: 1; letter-spacing: -2px; }
.data-item p { font-size: 24px; font-weight: 600; opacity: 0.9; }

/* 下载版本区 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.dl-card { background: var(--bg-white); border: 2px solid #EAEAEA; padding: 60px 40px; text-align: center; border-radius: 24px; transition: 0.3s; }
.dl-card:hover { border-color: var(--text-dark); transform: translateY(-10px); box-shadow: var(--shadow-heavy); }
.dl-card.rec { border-color: var(--primary-color); background: #F8FFF9; }
.dl-card h3 { font-size: 32px; font-weight: 900; color: var(--text-dark); margin-bottom: 25px; }
.dl-card p { font-size: 18px; color: var(--text-muted); margin-bottom: 50px; height: 60px; line-height: 1.6; }
.dl-card .btn { width: 100%; font-size: 20px; padding: 18px 0; }

/* FAQ */
.faq-grid { max-width: 1000px; margin: 0 auto; }
.faq-box { padding: 40px 0; border-bottom: 1px solid #EAEAEA; }
.faq-box:last-child { border-bottom: none; }
.faq-box h4 { font-size: 22px; font-weight: 800; color: var(--text-dark); margin-bottom: 20px; }
.faq-box p { font-size: 18px; color: var(--text-body); line-height: 1.8; }

/* Footer */
.footer { text-align: center; padding: 80px 20px; color: var(--text-muted); font-size: 16px; border-top: 1px solid #EAEAEA; }