:root {
    --tech-bg: #0A0F1A;
    --tech-card-bg: linear-gradient(145deg, #111A28, #0D1420);
    --tech-card-border: #1F2D40;
    --tech-blue: #3B82F6;
    --tech-cyan: #06B6D4;
    --text-white: #F8FAFC;
    --text-gray: #94A3B8;
    --card-shadow: 0 10px 30px rgba(0,0,0,0.5);
    --hover-shadow: 0 12px 40px rgba(59, 130, 246, 0.2);
    --radius-card: 20px;
}

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

/* 导航 */
.header { background: rgba(10, 15, 26, 0.8); backdrop-filter: blur(16px); border-bottom: 1px solid var(--tech-card-border); position: sticky; top: 0; z-index: 1000; }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 72px; padding: 0 20px; }
.logo { font-size: 22px; font-weight: 700; color: var(--text-white); display: flex; align-items: center; gap: 12px; }
.logo img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 15px; color: var(--text-gray); position: relative; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--tech-cyan); }
.nav-links a::before { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: var(--tech-cyan); transition: 0.3s; }
.nav-links a:hover::before, .nav-links a.active::before { width: 100%; }

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

/* 科技按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 32px; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; transition: 0.3s; }
.btn-primary { background: linear-gradient(90deg, var(--tech-blue), var(--tech-cyan)); color: #fff; border: none; box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(6, 182, 212, 0.5); }
.btn-outline { background: transparent; color: var(--tech-cyan); border: 1px solid var(--tech-cyan); box-shadow: inset 0 0 10px rgba(6, 182, 212, 0.1); }
.btn-outline:hover { background: rgba(6, 182, 212, 0.1); transform: translateY(-2px); }

/* 卡片基类 */
.tech-card { background: var(--tech-card-bg); border: 1px solid var(--tech-card-border); border-radius: var(--radius-card); padding: 40px; box-shadow: var(--card-shadow); transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); position: relative; overflow: hidden; }
.tech-card::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 2px; background: linear-gradient(90deg, transparent, var(--tech-cyan), transparent); transition: 0.5s; }
.tech-card:hover { transform: translateY(-8px); border-color: rgba(6, 182, 212, 0.4); box-shadow: var(--hover-shadow); }
.tech-card:hover::before { left: 100%; }

/* 首屏区域 */
.hero { display: flex; align-items: center; gap: 60px; padding: 80px 20px; max-width: 1200px; margin: 0 auto; }
.hero-content { flex: 1; }
.hero-content h1 { font-size: 56px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; background: linear-gradient(to right, #fff, var(--tech-cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-content .subtitle { font-size: 22px; color: var(--tech-gray); margin-bottom: 30px; letter-spacing: 2px; }
.hero-content .desc { font-size: 16px; color: var(--text-gray); margin-bottom: 40px; line-height: 1.8; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1.2; position: relative; }
.hero-visual img { border-radius: var(--radius-card); border: 1px solid var(--tech-card-border); box-shadow: 0 20px 50px rgba(0,0,0,0.8); }
.hero-visual::after { content: ''; position: absolute; inset: -20px; background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%); z-index: -1; }

/* 区块标题 */
.sec-title { text-align: center; font-size: 32px; font-weight: 700; margin-bottom: 50px; color: var(--text-white); letter-spacing: 1px; }
.sec-title span { color: var(--tech-cyan); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; margin-bottom: 80px; }
.f-card { padding: 30px 15px; text-align: center; }
.f-card img { width: 48px; height: 48px; margin: 0 auto 20px; filter: drop-shadow(0 0 8px var(--tech-cyan)); }
.f-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; color: var(--text-white); }
.f-card p { font-size: 13px; color: var(--text-gray); }

/* 功能详情 */
.detail-box { display: flex; align-items: center; gap: 60px; margin-bottom: 60px; padding: 50px; }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-tag { display: inline-block; padding: 4px 12px; background: rgba(6, 182, 212, 0.1); border: 1px solid var(--tech-cyan); color: var(--tech-cyan); border-radius: 4px; font-size: 12px; margin-bottom: 15px; }
.d-text h3 { font-size: 28px; margin-bottom: 20px; font-weight: 700; }
.d-text p { font-size: 15px; color: var(--text-gray); margin-bottom: 24px; line-height: 1.8; }
.d-data { font-size: 18px; font-weight: 600; color: var(--tech-blue); display: flex; align-items: center; gap: 10px; }
.d-data::before { content: ''; width: 8px; height: 8px; background: var(--tech-blue); border-radius: 50%; box-shadow: 0 0 10px var(--tech-blue); }
.d-visual { flex: 1.2; position: relative; }
.d-visual img { width: 100%; border: 1px solid var(--tech-card-border); }

/* 对比表格 */
.compare-wrap { overflow-x: auto; padding: 0; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 24px; border-bottom: 1px solid var(--tech-card-border); }
.compare-table th { background: rgba(0,0,0,0.2); font-size: 15px; color: var(--text-gray); font-weight: 600; }
.compare-table td { font-size: 15px; color: var(--text-white); }
.compare-table .hl { background: rgba(6, 182, 212, 0.05); color: var(--tech-cyan); font-weight: 700; border-left: 2px solid var(--tech-cyan); border-right: 2px solid var(--tech-cyan); }
.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: 30px; }
.dl-card { text-align: center; padding: 50px 30px; display: flex; flex-direction: column; }
.dl-card.rec { border-color: var(--tech-cyan); box-shadow: 0 0 30px rgba(6, 182, 212, 0.15); }
.dl-card h3 { font-size: 24px; margin-bottom: 15px; color: var(--text-white); }
.dl-card p { font-size: 14px; color: var(--text-gray); margin-bottom: 30px; flex: 1; }
.dl-card .btn { width: 100%; }

/* 数据背书 */
.data-sec { display: flex; justify-content: space-around; margin: 80px 0; padding: 60px 20px; border-top: 1px solid var(--tech-card-border); border-bottom: 1px solid var(--tech-card-border); background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.05) 0%, transparent 70%); }
.data-item { text-align: center; }
.data-item h4 { font-size: 48px; font-weight: 800; color: var(--tech-cyan); margin-bottom: 10px; text-shadow: 0 0 15px rgba(6, 182, 212, 0.4); }
.data-item p { font-size: 14px; color: var(--text-gray); letter-spacing: 1px; }

/* FAQ */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.faq-box { padding: 25px 30px; text-align: left; }
.faq-box h4 { font-size: 18px; color: var(--tech-blue); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.faq-box h4::before { content: '■'; font-size: 12px; color: var(--tech-cyan); }
.faq-box p { font-size: 15px; color: var(--text-gray); line-height: 1.6; }

/* Footer */
.footer { border-top: 1px solid var(--tech-card-border); padding: 40px; text-align: center; color: var(--text-gray); font-size: 14px; margin-top: 60px; background: #070B12; }