:root {
    --eco-bg: #F0FDF4; /* 浅绿背景 */
    --eco-primary: #10B981; /* 自然绿 */
    --eco-primary-hover: #059669; /* 深翠绿 */
    --eco-dark: #064E3B; /* 墨绿文字 */
    --eco-text: #374151;
    --eco-muted: #6B7280;
    --tech-line: rgba(16, 185, 129, 0.15); /* 科技线条颜色 */
    --leaf-shadow: 0 10px 25px rgba(16, 185, 129, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, "Microsoft YaHei", sans-serif;
    background-color: var(--eco-bg);
    color: var(--eco-text);
    line-height: 1.6;
    /* 科技线条背景网格 */
    background-image: 
        linear-gradient(var(--tech-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--tech-line) 1px, transparent 1px);
    background-size: 60px 60px;
    background-attachment: fixed;
    position: relative;
}

/* 顶部柔和渐变 */
body::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 500px;
    background: radial-gradient(circle at 50% -100%, rgba(16, 185, 129, 0.2) 0%, transparent 80%);
    z-index: -1;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; border-radius: 16px; }

/* 导航 */
.header {
    background: rgba(240, 253, 244, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--tech-line);
    position: sticky; top: 0; z-index: 1000; padding: 15px 0;
}
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 20px; }
.logo { font-size: 22px; font-weight: 800; color: var(--eco-dark); display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 38px; height: 38px; border-radius: 50%; box-shadow: var(--leaf-shadow); }
.nav-links { display: flex; gap: 25px; }
.nav-links a { font-size: 15px; font-weight: 600; color: var(--eco-text); position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--eco-primary); }
.nav-links a.active::after {
    content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%);
    width: 20px; height: 3px; background: var(--eco-primary); border-radius: 2px;
}

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px; border-radius: 40px;
    font-size: 16px; font-weight: 700; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
}
.btn-primary {
    background: linear-gradient(135deg, #34D399 0%, #10B981 100%);
    color: #fff; box-shadow: var(--leaf-shadow);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    transform: translateY(-2px); box-shadow: 0 15px 30px rgba(16, 185, 129, 0.3);
}
.btn-outline {
    background: transparent; color: var(--eco-primary); border-color: var(--eco-primary);
}
.btn-outline:hover { background: rgba(16, 185, 129, 0.1); transform: translateY(-2px); }

/* 通用容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; position: relative; z-index: 1; }
.sec-title { text-align: center; font-size: 36px; font-weight: 800; color: var(--eco-dark); margin-bottom: 16px; }
.sec-subtitle { text-align: center; font-size: 16px; color: var(--eco-muted); margin-bottom: 60px; }

/* Hero区 */
.hero { text-align: center; padding: 80px 20px 100px; position: relative; overflow: hidden; }
.hero h1 { font-size: 56px; font-weight: 900; color: var(--eco-dark); margin-bottom: 20px; letter-spacing: -1px; }
.hero .subtitle { font-size: 22px; color: var(--eco-primary); font-weight: 600; margin-bottom: 50px; }
.hero-btns { display: flex; justify-content: center; gap: 20px; margin-bottom: 60px; }
.hero-visual { max-width: 900px; margin: 0 auto; border-radius: 24px; box-shadow: var(--leaf-shadow); background: #fff; padding: 15px; position: relative; }
.hero-visual::after { content: ''; position: absolute; top: -20px; right: -20px; width: 100px; height: 100px; background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path fill="%2310B981" d="M38.1,-48.5C49.8,-39.8,59.8,-27.4,65.8,-12.3C71.8,2.8,73.8,20.7,66.1,34.4C58.4,48.1,41,57.7,24,62C7,66.3,-9.6,65.3,-24.5,59.6C-39.4,53.9,-52.7,43.5,-61.8,29.3C-70.9,15.1,-75.8,-2.9,-70.7,-18C-65.6,-33.1,-50.5,-45.3,-35.8,-53.4C-21.1,-61.5,-6.3,-65.5,5.7,-71.2C17.7,-76.9,26.4,-57.2,38.1,-48.5Z" transform="translate(50 50) scale(0.8)" opacity="0.3"/></svg>') no-repeat; z-index: -1; }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 25px; }
.f-box { text-align: center; padding: 40px 20px; border-radius: 20px; background: rgba(255,255,255,0.7); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.5); box-shadow: 0 4px 15px rgba(0,0,0,0.02); transition: 0.3s; position: relative; overflow: hidden; }
.f-box:hover { transform: translateY(-8px); box-shadow: var(--leaf-shadow); background: #fff; }
.f-box::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--eco-primary); transform: scaleX(0); transition: 0.3s; transform-origin: left; }
.f-box:hover::before { transform: scaleX(1); }
.f-box img { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 16px; box-shadow: 0 4px 10px rgba(16,185,129,0.15); }
.f-box h3 { font-size: 18px; font-weight: 800; color: var(--eco-dark); margin-bottom: 10px; }
.f-box p { font-size: 14px; color: var(--eco-muted); }

/* 功能详情 */
.detail-item { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 800; color: var(--eco-dark); margin-bottom: 20px; }
.d-text p { font-size: 16px; color: var(--eco-text); margin-bottom: 30px; line-height: 1.8; }
.d-data { display: inline-block; padding: 10px 24px; background: rgba(16, 185, 129, 0.1); color: var(--eco-primary); font-weight: 700; border-radius: 30px; border: 1px solid rgba(16, 185, 129, 0.2); }
.d-visual { flex: 1; position: relative; }
.d-visual img { border-radius: 24px; box-shadow: var(--leaf-shadow); border: 8px solid #fff; }
.d-visual::after { content: ''; position: absolute; bottom: -20px; left: -20px; width: 100px; height: 100px; background: radial-gradient(circle, var(--eco-primary) 0%, transparent 70%); opacity: 0.2; z-index: -1; }

/* 浏览器对比 */
.compare-box { background: #fff; border-radius: 24px; padding: 40px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); border: 1px solid var(--tech-line); }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid #E5E7EB; }
.compare-table th { font-weight: 600; color: var(--eco-muted); }
.compare-table .hl { color: var(--eco-primary); font-weight: 800; background: rgba(16, 185, 129, 0.03); }
.compare-table tr:last-child td { border-bottom: none; }

/* 数据背书 */
.data-sec { background: var(--eco-primary); background-image: linear-gradient(45deg, var(--eco-dark) 0%, var(--eco-primary) 100%); padding: 60px 0; margin: 60px 0; color: #fff; position: relative; overflow: hidden; }
.data-sec::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: url('data:image/svg+xml;utf8,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M0,50 Q25,25 50,50 T100,50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="2"/></svg>') repeat; background-size: 100px 100px; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; align-items: center; position: relative; z-index: 1; }
.data-item { text-align: center; }
.data-item h4 { font-size: 48px; font-weight: 900; margin-bottom: 10px; text-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.data-item p { font-size: 16px; font-weight: 500; opacity: 0.9; }
.data-icon { width: 90px; height: 90px; border-radius: 50%; background: rgba(255,255,255,0.1); padding: 15px; backdrop-filter: blur(5px); }

/* 下载版本区 */
.dl-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { padding: 50px 30px; background: #fff; border-radius: 24px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.03); transition: 0.3s; border: 1px solid var(--tech-line); }
.dl-card:hover { transform: translateY(-10px); box-shadow: var(--leaf-shadow); border-color: var(--eco-primary); }
.dl-card h3 { font-size: 24px; font-weight: 800; color: var(--eco-dark); margin-bottom: 15px; }
.dl-card p { font-size: 14px; color: var(--eco-muted); margin-bottom: 30px; height: 42px; line-height: 1.6; }
.dl-card .btn { width: 100%; }
.dl-card.highlight { background: linear-gradient(to bottom, #fff, #F0FDF4); border: 2px solid var(--eco-primary); }

/* FAQ */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { margin-bottom: 20px; padding: 30px; background: #fff; border-radius: 16px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); border: 1px solid var(--tech-line); }
.faq-item h4 { font-size: 18px; font-weight: 700; color: var(--eco-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.faq-item h4::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--eco-primary); box-shadow: 0 0 10px var(--eco-primary); }
.faq-item p { font-size: 15px; color: var(--eco-muted); line-height: 1.7; padding-left: 18px; }

/* Footer */
.footer { padding: 40px 20px; text-align: center; background: #fff; border-top: 1px solid #E5E7EB; color: var(--eco-muted); font-size: 14px; margin-top: 60px; }