:root {
    --primary: #00A65A; /* 安全绿 */
    --primary-hover: #008c4c;
    --secondary: #FF6600; /* 下载橙 */
    --secondary-hover: #e55c00;
    --text-dark: #333333;
    --text-muted: #777777;
    --bg-white: #ffffff;
    --bg-light: #f5f7fa;
    --border: #e0e0e0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; color: var(--text-dark); background: var(--bg-white); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; border-radius: 4px; }

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

/* 导航栏 */
header { background: #fff; border-bottom: 2px solid var(--primary); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo-area { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 26px; font-weight: bold; color: var(--text-dark); }
.logo span { color: var(--primary); }
.badge-pc { background: var(--bg-light); color: var(--text-muted); padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border); font-size: 12px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 16px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

/* 下载按钮通用 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 30px; border-radius: 4px; font-weight: bold; font-size: 18px;
    cursor: pointer; transition: 0.3s; border: none; text-align: center;
}
.btn-dl { background: var(--primary); color: #fff; box-shadow: 0 4px 10px rgba(0, 166, 90, 0.3); }
.btn-dl:hover { background: var(--primary-hover); transform: translateY(-2px); }
.btn-dl-alt { background: var(--bg-white); color: var(--primary); border: 1px solid var(--primary); }
.btn-dl-alt:hover { background: #f0fdf6; }

/* Hero区：突出下载框 */
.hero { background: url('assets/bg-pattern.png') repeat, linear-gradient(135deg, #f0fdf6 0%, #e6f7ff 100%); padding: 80px 0; border-bottom: 1px solid var(--border); }
.hero-content { display: flex; align-items: center; gap: 50px; background: #fff; padding: 40px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
.hero-text { flex: 1; }
.hero-text h1 { font-size: 42px; color: var(--text-dark); margin-bottom: 15px; }
.hero-text p { font-size: 18px; color: var(--text-muted); margin-bottom: 30px; }
.dl-box { background: var(--bg-light); border: 1px dashed var(--border); padding: 25px; border-radius: 8px; }
.dl-box-title { font-weight: bold; margin-bottom: 15px; display: flex; align-items: center; gap: 10px; }
.dl-box-title i { color: var(--primary); font-size: 20px; }
.dl-actions { display: flex; gap: 15px; }
.hero-img { flex: 1; text-align: center; }

/* 通用模块 */
section { padding: 70px 0; }
.sec-title { text-align: center; font-size: 32px; font-weight: bold; margin-bottom: 50px; color: var(--text-dark); }
.sec-title::after { content: ''; display: block; width: 50px; height: 3px; background: var(--primary); margin: 15px auto 0; }

/* 版本选择区 (重点) */
.version-wrap { display: flex; gap: 20px; justify-content: center; margin-top: -30px; margin-bottom: 50px; }
.v-card {
    flex: 1; max-width: 380px; background: #fff; border: 2px solid var(--border);
    border-radius: 8px; padding: 30px; text-align: center; transition: 0.3s; position: relative;
}
.v-card:hover { border-color: var(--primary); box-shadow: 0 10px 20px rgba(0,0,0,0.05); transform: translateY(-5px); }
.v-card.rec { border-color: var(--secondary); box-shadow: 0 10px 20px rgba(255,102,0,0.1); }
.v-card.rec .tag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--secondary); color: #fff; padding: 4px 15px; border-radius: 20px; font-size: 14px; font-weight: bold; }
.v-card h3 { font-size: 24px; margin-bottom: 15px; color: var(--text-dark); }
.v-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 25px; height: 42px; }

/* 核心卖点 */
.feature-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; text-align: center; }
.f-item { padding: 20px; }
.f-item img { width: 50px; height: 50px; margin: 0 auto 15px; }
.f-item h4 { font-size: 16px; margin-bottom: 8px; }
.f-item p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 */
.detail-row { display: flex; align-items: center; gap: 50px; margin-bottom: 60px; padding: 30px; background: var(--bg-light); border-radius: 8px; }
.detail-row:nth-child(even) { flex-direction: row-reverse; background: #fff; border: 1px solid var(--border); }
.d-content { flex: 1; }
.d-content h3 { font-size: 26px; margin-bottom: 15px; color: var(--primary); }
.d-content p { font-size: 16px; color: var(--text-muted); line-height: 1.8; margin-bottom: 15px; }
.d-data { display: inline-block; background: #e6f7ff; color: #0066cc; padding: 5px 12px; border-radius: 4px; font-size: 14px; font-weight: bold; border-left: 3px solid #0066cc; }
.d-img { flex: 1; }

/* 对比表格 */
.compare-tb { width: 100%; border-collapse: collapse; text-align: center; border: 1px solid var(--border); }
.compare-tb th, .compare-tb td { padding: 18px; border-bottom: 1px solid var(--border); }
.compare-tb th { background: var(--bg-light); font-weight: bold; color: var(--text-dark); }
.compare-tb .hl { color: var(--primary); font-weight: bold; background: #f0fdf6; border-left: 2px solid var(--primary); border-right: 2px solid var(--primary); }

/* 数据背书 */
.data-sec { background: var(--primary); color: #fff; text-align: center; padding: 50px 0; }
.data-box { display: flex; justify-content: space-around; }
.data-item h4 { font-size: 48px; font-weight: bold; margin-bottom: 5px; }
.data-item p { font-size: 16px; opacity: 0.9; }

/* FAQ */
.faq-wrap { column-count: 2; column-gap: 40px; }
.faq-box { margin-bottom: 30px; break-inside: avoid; }
.faq-box h4 { font-size: 16px; color: var(--text-dark); margin-bottom: 10px; display: flex; gap: 8px; }
.faq-box h4::before { content: 'Q:'; color: var(--secondary); font-weight: bold; }
.faq-box p { font-size: 14px; color: var(--text-muted); margin-left: 22px; }

footer { background: #222; color: #aaa; text-align: center; padding: 30px 0; font-size: 14px; }