:root {
    --primary: #1278ff; /* 下载站常用安全蓝 */
    --primary-dark: #005ce6;
    --green-safe: #00b359;
    --bg-main: #f3f5f7;
    --bg-white: #ffffff;
    --text-dark: #333333;
    --text-gray: #777777;
    --border-line: #e0e4e8;
    --shadow: 0 2px 10px rgba(0,0,0,0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", Arial, sans-serif; color: var(--text-dark); background: var(--bg-main); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
img { max-width: 100%; border-radius: 4px; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 15px; }
.card { background: var(--bg-white); border: 1px solid var(--border-line); border-radius: 4px; box-shadow: var(--shadow); margin-bottom: 20px; padding: 30px; }

/* 顶部导航 */
.header { background: var(--bg-white); border-bottom: 2px solid var(--primary); }
.top-bar { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo-area { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: bold; color: var(--primary); }
.logo-area img { width: 36px; height: 36px; }
.nav-links { display: flex; gap: 20px; }
.nav-links a { font-size: 16px; padding: 8px 15px; border-radius: 4px; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { background: var(--primary); color: #fff; }

/* 面包屑 / 标签 */
.breadcrumbs { font-size: 13px; color: var(--text-gray); padding: 15px 0; }
.breadcrumbs a:hover { color: var(--primary); }
.tags { display: inline-flex; gap: 8px; margin-top: 10px; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 2px; border: 1px solid; }
.tag.safe { color: var(--green-safe); border-color: var(--green-safe); background: #e6f7ef; }
.tag.pc { color: #ff6b00; border-color: #ff6b00; background: #fff0e6; }
.tag.speed { color: var(--primary); border-color: var(--primary); background: #e6f0ff; }

/* 软件头部信息 (Hero区改版) */
.soft-hero { display: flex; gap: 30px; }
.soft-icon { width: 120px; height: 120px; flex-shrink: 0; padding: 10px; border: 1px solid var(--border-line); border-radius: 16px; box-shadow: var(--shadow); }
.soft-info { flex: 1; }
.soft-info h1 { font-size: 32px; margin-bottom: 8px; }
.soft-info .subtitle { font-size: 16px; color: var(--text-gray); margin-bottom: 15px; }
.soft-meta { display: flex; gap: 30px; font-size: 13px; color: var(--text-gray); margin-bottom: 20px; }
.soft-meta span { display: flex; align-items: center; gap: 5px; }

/* 下载按钮组 */
.dl-btns { display: flex; gap: 20px; margin-top: 20px; }
.btn-dl { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 15px 40px; font-size: 20px; font-weight: bold; border-radius: 4px; cursor: pointer; color: #fff; text-shadow: 0 1px 1px rgba(0,0,0,0.2); }
.btn-dl.main { background: linear-gradient(180deg, #3391ff 0%, #1278ff 100%); border: 1px solid #0066e6; box-shadow: 0 4px 10px rgba(18,120,255,0.3); }
.btn-dl.main:hover { background: linear-gradient(180deg, #1278ff 0%, #005ce6 100%); }
.btn-dl.speed { background: linear-gradient(180deg, #00cc66 0%, #00b359 100%); border: 1px solid #00994d; box-shadow: 0 4px 10px rgba(0,179,89,0.3); }
.btn-dl.speed:hover { background: linear-gradient(180deg, #00b359 0%, #00994d 100%); }

.hero-visual { text-align: center; margin-top: 30px; }
.hero-visual img { max-height: 400px; border: 1px solid var(--border-line); box-shadow: var(--shadow); }

/* 模块标题 */
.sec-title { font-size: 22px; border-left: 4px solid var(--primary); padding-left: 10px; margin-bottom: 20px; font-weight: bold; display: flex; align-items: center; justify-content: space-between; }

/* 核心卖点 */
.feature-icons { display: flex; justify-content: space-around; text-align: center; padding: 20px 0; }
.f-icon-box img { width: 48px; height: 48px; margin-bottom: 10px; }
.f-icon-box h4 { font-size: 15px; color: var(--text-dark); }
.f-icon-box p { font-size: 13px; color: var(--text-gray); }

/* 功能详情列表 */
.detail-list { display: flex; flex-direction: column; gap: 20px; }
.detail-item { display: flex; gap: 20px; padding-bottom: 20px; border-bottom: 1px dashed var(--border-line); }
.detail-item:last-child { border-bottom: none; padding-bottom: 0; }
.d-text { flex: 1; }
.d-text h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; }
.d-text p { font-size: 14px; color: var(--text-gray); margin-bottom: 10px; line-height: 1.8; }
.d-badge { display: inline-block; background: #fff4e6; color: #ff6b00; font-size: 12px; padding: 2px 8px; border-radius: 2px; }
.d-img { width: 300px; flex-shrink: 0; }
.d-img img { border: 1px solid var(--border-line); }

/* 浏览器对比 */
.compare-table { width: 100%; border-collapse: collapse; text-align: center; font-size: 14px; }
.compare-table th, .compare-table td { border: 1px solid var(--border-line); padding: 12px; }
.compare-table th { background: #f8f9fa; font-weight: bold; }
.compare-table .highlight { background: #e6f0ff; color: var(--primary); font-weight: bold; }

/* 下载版本区 */
.version-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ver-box { border: 1px solid var(--border-line); padding: 20px; text-align: center; border-radius: 4px; background: #fafbfc; transition: 0.3s; }
.ver-box:hover { border-color: var(--primary); background: #fff; box-shadow: var(--shadow); }
.ver-box h4 { font-size: 18px; margin-bottom: 10px; }
.ver-box p { font-size: 13px; color: var(--text-gray); margin-bottom: 20px; height: 40px; }
.btn-sm { display: inline-block; padding: 8px 25px; border: 1px solid var(--primary); color: var(--primary); border-radius: 2px; font-weight: bold; }
.btn-sm:hover { background: var(--primary); color: #fff; }

/* 数据背书 */
.data-box { display: flex; justify-content: space-around; background: #e6f7ef; padding: 30px; border: 1px solid #b3e6cc; border-radius: 4px; }
.data-col { text-align: center; }
.data-col strong { font-size: 36px; color: var(--green-safe); display: block; margin-bottom: 5px; }
.data-col span { font-size: 14px; color: #555; }

/* FAQ */
.faq-list dl { margin-bottom: 15px; }
.faq-list dt { font-weight: bold; font-size: 15px; margin-bottom: 5px; color: var(--primary-dark); }
.faq-list dd { font-size: 14px; color: var(--text-gray); padding-left: 20px; border-left: 2px solid #ccc; line-height: 1.6; }

/* 页脚 */
.footer { text-align: center; padding: 30px; color: var(--text-gray); font-size: 13px; border-top: 1px solid var(--border-line); margin-top: 40px; }