:root {
    --primary: #00B262;
    --primary-hover: #009650;
    --text-dark: #1F2937;
    --text-gray: #4B5563;
    --text-light: #9CA3AF;
    --bg-white: #ffffff;
    --bg-gray: #F3F4F6;
    --bg-hero: linear-gradient(135deg, #F0FDF4 0%, #E0F2FE 100%);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; 
    line-height: 1.6; 
    color: var(--text-dark);
    background-color: var(--bg-white);
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* 导航栏 */
header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { font-size: 24px; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-weight: 500; font-size: 15px; color: var(--text-gray); transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 36px; border-radius: 50px; font-weight: 600; font-size: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); cursor: pointer;
}
.btn-primary { 
    background: var(--primary); color: #fff; 
    box-shadow: 0 8px 16px rgba(0, 178, 98, 0.2);
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 12px 20px rgba(0, 178, 98, 0.3); }
.btn-outline { 
    background: transparent; color: var(--text-dark); 
    border: 2px solid #E5E7EB; 
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: #F0FDF4; }

/* 官方重构风 Hero */
.hero { 
    background: var(--bg-hero);
    padding: 100px 0 0 0; 
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero h1 { font-size: 56px; font-weight: 800; letter-spacing: -1px; margin-bottom: 24px; color: #111827; }
.hero p { font-size: 20px; color: var(--text-gray); margin-bottom: 48px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-btns { display: flex; gap: 24px; justify-content: center; margin-bottom: 80px; }

/* 浏览器截图容器 */
.hero-mockup {
    max-width: 1000px; margin: 0 auto;
    background: #fff; border-radius: 16px 16px 0 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0,0,0,0.05);
    border-bottom: none;
    overflow: hidden;
    transform: translateY(20px);
}
.mockup-header {
    height: 38px; background: #F9FAFB; border-bottom: 1px solid #E5E7EB;
    display: flex; align-items: center; padding: 0 16px; gap: 8px;
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.r { background: #FF5F56; } .dot.y { background: #FFBD2E; } .dot.g { background: #27C93F; }

/* 通用模块 */
section { padding: 100px 0; }
.section-title { text-align: center; font-size: 40px; font-weight: 700; margin-bottom: 64px; color: #111827; letter-spacing: -0.5px; }

/* 核心卖点 */
.feature-row { display: flex; gap: 32px; justify-content: space-between; flex-wrap: wrap; }
.feature-item { flex: 1; min-width: 200px; text-align: center; }
.feature-item img { width: 64px; height: 64px; margin: 0 auto 24px; }
.feature-item h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-item p { color: var(--text-gray); font-size: 15px; }

/* 功能详情 (交错图文) */
.detail-block { display: flex; align-items: center; gap: 60px; margin-bottom: 100px; }
.detail-block:nth-child(even) { flex-direction: row-reverse; }
.detail-text { flex: 1; }
.detail-text h3 { font-size: 32px; font-weight: 700; margin-bottom: 24px; }
.detail-text p { font-size: 18px; color: var(--text-gray); margin-bottom: 24px; }
.detail-img { flex: 1; border-radius: 20px; box-shadow: var(--shadow-lg); overflow: hidden; }

/* 浏览器对比 */
.compare-wrap { background: var(--bg-gray); padding: 80px 0; border-radius: 24px; }
.compare-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.compare-table th, .compare-table td { padding: 24px; text-align: center; border-bottom: 1px solid #E5E7EB; }
.compare-table th { background: #F9FAFB; font-weight: 700; font-size: 16px; color: #111827; }
.compare-table .highlight { background: #F0FDF4; color: var(--primary); font-weight: 700; }

/* 下载版本 */
.versions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.version-card {
    text-align: center; padding: 48px 32px; background: #fff;
    border: 1px solid #E5E7EB; border-radius: 24px;
    transition: transform 0.3s;
}
.version-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.version-card h3 { font-size: 24px; font-weight: 700; margin-bottom: 16px; }
.version-card p { color: var(--text-gray); margin-bottom: 32px; height: 48px; }

/* 数据背书 */
.data-stats { display: flex; justify-content: space-around; flex-wrap: wrap; text-align: center; background: #111827; color: #fff; padding: 60px 0; border-radius: 24px; }
.stat-item h4 { font-size: 56px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.stat-item p { font-size: 18px; color: #9CA3AF; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.faq-item { background: #F9FAFB; padding: 32px; border-radius: 16px; }
.faq-item h4 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: #111827; }
.faq-item p { color: var(--text-gray); font-size: 15px; }

footer { background: #F9FAFB; padding: 40px 0; text-align: center; color: var(--text-light); font-size: 14px; border-top: 1px solid #E5E7EB; }