:root {
    --brand-primary: #00D06B; /* 亮绿色 */
    --brand-dark: #00964A;
    --brand-shadow: #007538;
    --bg-color: #F4F7FE;
    --card-bg: #FFFFFF;
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --radius-lg: 32px;
    --radius-md: 20px;
    --shadow-3d: 0 20px 40px rgba(0, 0, 0, 0.08);
    --shadow-inner: inset 0 2px 4px rgba(255, 255, 255, 0.5);
}

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

/* 导航 */
.header { background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; box-shadow: 0 4px 20px rgba(0,0,0,0.05); }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 80px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: 800; display: flex; align-items: center; gap: 12px; color: var(--brand-dark); }
.logo img { width: 40px; height: 40px; filter: drop-shadow(0 4px 6px rgba(0,208,107,0.3)); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 16px; font-weight: 600; color: var(--text-gray); padding: 8px 16px; border-radius: 20px; transition: 0.3s; }
.nav-links a:hover, .nav-links a.active { background: #E6F8EF; color: var(--brand-dark); }

.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }

/* 3D 按钮 */
.btn-3d { 
    display: inline-flex; align-items: center; justify-content: center; 
    padding: 16px 40px; font-size: 18px; font-weight: 700; border-radius: 50px; 
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1); cursor: pointer;
}
.btn-primary { 
    background: linear-gradient(135deg, #00EA7C, #00C05F); color: #fff; 
    box-shadow: 0 8px 0 var(--brand-shadow), 0 15px 20px rgba(0,208,107,0.3), var(--shadow-inner);
    border: none;
}
.btn-primary:active { transform: translateY(8px); box-shadow: 0 0 0 var(--brand-shadow), 0 5px 10px rgba(0,208,107,0.3), var(--shadow-inner); }
.btn-outline { 
    background: #FFFFFF; color: var(--brand-dark); 
    box-shadow: 0 8px 0 #D1D5DB, 0 15px 20px rgba(0,0,0,0.05); border: 2px solid #E5E7EB;
}
.btn-outline:active { transform: translateY(8px); box-shadow: 0 0 0 #D1D5DB, 0 5px 10px rgba(0,0,0,0.05); }

/* 首屏 3D 网页窗口效果 */
.hero { display: flex; align-items: center; gap: 60px; padding: 60px 20px 100px; max-width: 1200px; margin: 0 auto; }
.hero-content { flex: 1; }
.hero-content h1 { font-size: 64px; font-weight: 900; line-height: 1.1; margin-bottom: 20px; background: linear-gradient(135deg, var(--brand-dark), #00E676); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-content .subtitle { font-size: 24px; font-weight: 700; color: var(--text-dark); margin-bottom: 30px; }
.hero-content .desc { font-size: 18px; color: var(--text-gray); margin-bottom: 40px; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1.2; perspective: 1200px; }
.hero-visual img { 
    transform: rotateY(-15deg) rotateX(10deg) translateZ(50px); 
    border-radius: var(--radius-lg); 
    box-shadow: -30px 40px 60px rgba(0,0,0,0.15), inset 0 0 0 4px rgba(255,255,255,0.5); 
    border: 8px solid #fff;
    transition: transform 0.5s ease;
}
.hero-visual:hover img { transform: rotateY(-5deg) rotateX(5deg) translateZ(80px); }

/* 模块标题 */
.sec-title { text-align: center; font-size: 40px; font-weight: 800; margin-bottom: 60px; color: var(--text-dark); }

/* 圆角卡片 (卖点区) */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.f-card { background: var(--card-bg); padding: 40px 20px; border-radius: var(--radius-lg); text-align: center; box-shadow: var(--shadow-3d); transition: transform 0.3s; position: relative; z-index: 1; }
.f-card::before { content: ''; position: absolute; inset: 0; border-radius: var(--radius-lg); padding: 2px; background: linear-gradient(135deg, rgba(0,208,107,0.5), transparent); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; z-index: -1; }
.f-card:hover { transform: translateY(-10px); }
.f-card img { width: 64px; height: 64px; margin: 0 auto 20px; filter: drop-shadow(0 10px 15px rgba(0,0,0,0.1)); }
.f-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.f-card p { font-size: 14px; color: var(--text-gray); }

/* 功能详情 (立体漂浮) */
.detail-box { display: flex; align-items: center; gap: 80px; margin-bottom: 100px; background: var(--card-bg); border-radius: var(--radius-lg); padding: 60px; box-shadow: 0 30px 60px rgba(0,0,0,0.06); }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 800; margin-bottom: 20px; }
.d-text p { font-size: 18px; color: var(--text-gray); margin-bottom: 30px; }
.d-badge { display: inline-block; padding: 10px 20px; background: #E6F8EF; color: var(--brand-dark); border-radius: 20px; font-weight: 700; box-shadow: inset 0 2px 4px rgba(255,255,255,0.8); }
.d-visual { flex: 1.2; position: relative; }
.d-visual img { border-radius: var(--radius-md); box-shadow: 0 20px 40px rgba(0,0,0,0.12); border: 6px solid #fff; transform: translateY(0); transition: 0.5s; }
.d-visual:hover img { transform: translateY(-10px); }

/* 对比表格 3D化 */
.compare-wrap { background: var(--card-bg); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-3d); }
.compare-table { width: 100%; border-collapse: separate; border-spacing: 0 16px; text-align: center; }
.compare-table th { padding: 16px; font-size: 18px; color: var(--text-gray); font-weight: 600; }
.compare-table td { padding: 24px 16px; background: #F9FAFB; font-size: 16px; font-weight: 600; }
.compare-table td:first-child { border-radius: 16px 0 0 16px; text-align: left; padding-left: 30px; }
.compare-table td:last-child { border-radius: 0 16px 16px 0; }
.compare-table .highlight { background: #E6F8EF; color: var(--brand-dark); transform: scale(1.02); box-shadow: 0 10px 20px rgba(0,208,107,0.1); border-radius: 16px !important; position: relative; z-index: 2; }

/* 下载版本区 */
.version-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; padding-top: 20px; }
.v-card { background: var(--card-bg); border-radius: var(--radius-lg); padding: 50px 30px; text-align: center; box-shadow: var(--shadow-3d); position: relative; transition: 0.3s; }
.v-card:hover { transform: translateY(-15px); }
.v-card.rec { transform: scale(1.05); border: 4px solid var(--brand-primary); z-index: 2; }
.v-card.rec:hover { transform: scale(1.05) translateY(-10px); }
.v-card h3 { font-size: 26px; font-weight: 800; margin-bottom: 20px; }
.v-card p { font-size: 16px; color: var(--text-gray); margin-bottom: 40px; height: 50px; }

/* 数据背书 */
.data-sec { display: flex; justify-content: space-around; background: linear-gradient(135deg, #00C05F, #00964A); border-radius: var(--radius-lg); padding: 60px 40px; color: #fff; margin: 80px 0; box-shadow: 0 30px 60px rgba(0,150,74,0.3); transform: perspective(1000px) rotateX(2deg); }
.data-item { text-align: center; }
.data-item h4 { font-size: 56px; font-weight: 900; margin-bottom: 10px; text-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.data-item p { font-size: 18px; font-weight: 600; opacity: 0.9; }

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 24px; }
.faq-box { background: var(--card-bg); border-radius: var(--radius-md); padding: 30px; box-shadow: 0 10px 30px rgba(0,0,0,0.04); transition: 0.3s; }
.faq-box:hover { transform: scale(1.02); }
.faq-box h4 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--brand-dark); }
.faq-box p { font-size: 16px; color: var(--text-gray); }

/* Footer */
.footer { text-align: center; padding: 40px; margin-top: 60px; font-weight: 600; color: var(--text-gray); }