:root {
    --grad-dark: #064E3B;
    --grad-mid: #047857;
    --grad-light: #10B981;
    --text-white: #FFFFFF;
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --card-bg: #FFFFFF;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, var(--grad-dark) 0%, var(--grad-mid) 50%, var(--grad-light) 100%);
    background-attachment: fixed;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航 */
.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky; top: 0; z-index: 1000;
}
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; }
.logo { font-size: 24px; font-weight: 800; color: var(--text-white); display: flex; align-items: center; gap: 12px; }
.logo-icon { width: 36px; height: 36px; border-radius: 10px; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 600; color: rgba(255, 255, 255, 0.8); position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--text-white); }
.nav-links a.active::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 100%; height: 3px; background: #FFF; border-radius: 2px; }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 16px 36px;
    border-radius: 30px; font-size: 16px; font-weight: 700; cursor: pointer; transition: 0.3s;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15); border: 2px solid transparent;
}
.btn-primary { background: #FFF; color: var(--grad-mid); }
.btn-primary:hover { background: #F1F5F9; transform: translateY(-3px); box-shadow: 0 15px 25px rgba(0, 0, 0, 0.2); }
.btn-outline { background: rgba(255, 255, 255, 0.1); color: #FFF; border-color: rgba(255, 255, 255, 0.5); backdrop-filter: blur(10px); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.2); border-color: #FFF; transform: translateY(-3px); }

/* 绿色主题内容区 */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.sec-title { text-align: center; font-size: 38px; font-weight: 800; margin-bottom: 16px; color: var(--grad-dark); }
.sec-subtitle { text-align: center; font-size: 16px; color: var(--text-gray); margin-bottom: 60px; font-weight: 500; }

/* Hero区 */
.hero { text-align: center; padding: 100px 20px 40px; color: #FFF; }
.hero h1 { font-size: 64px; font-weight: 900; margin-bottom: 20px; letter-spacing: -1px; text-shadow: 0 10px 20px rgba(0,0,0,0.2); }
.hero .subtitle { font-size: 24px; font-weight: 500; opacity: 0.9; margin-bottom: 50px; letter-spacing: 2px; }
.hero-btns { display: flex; justify-content: center; gap: 24px; margin-bottom: 60px; }
/* 悬浮浏览器窗口 */
.floating-window { max-width: 900px; margin: 0 auto; animation: float 6s ease-in-out infinite; perspective: 1000px; }
.floating-window img { border-radius: 16px; box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4); border: 1px solid rgba(255, 255, 255, 0.2); }
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* 主体内凹卷轴 */
.content-wrapper { background: #F8FAFC; border-radius: 40px 40px 0 0; padding-top: 40px; position: relative; z-index: 10; box-shadow: 0 -20px 50px rgba(0,0,0,0.2); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.f-box { background: var(--card-bg); padding: 40px 20px; border-radius: 20px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.05); transition: 0.3s; }
.f-box:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(16, 185, 129, 0.15); }
.f-icon { width: 64px; height: 64px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #ECFDF5, #D1FAE5); border-radius: 16px; }
.f-box img { width: 36px; height: 36px; filter: hue-rotate(120deg) brightness(0.8) sepia(1); }
.f-box h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--grad-dark); }
.f-box p { font-size: 14px; color: var(--text-gray); }

/* 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(--grad-dark); margin-bottom: 20px; }
.d-text p { font-size: 16px; color: var(--text-gray); margin-bottom: 30px; line-height: 1.8; }
.d-data { display: inline-block; padding: 10px 24px; background: #ECFDF5; color: var(--grad-mid); border-radius: 30px; font-weight: 700; font-size: 15px; border: 1px solid #A7F3D0; }
.d-visual { flex: 1; border-radius: 24px; padding: 20px; background: #FFF; box-shadow: 0 20px 40px rgba(0,0,0,0.06); }

/* 浏览器对比 */
.compare-box { background: #FFF; border-radius: 24px; padding: 30px; box-shadow: 0 10px 30px rgba(0,0,0,0.04); }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 24px; border-bottom: 1px solid #F1F5F9; }
.compare-table th { font-weight: 600; color: var(--text-gray); text-transform: uppercase; font-size: 14px; letter-spacing: 1px; }
.compare-table td { font-weight: 600; font-size: 16px; }
.compare-table .hl { color: var(--grad-mid); font-weight: 800; background: #ECFDF5; border-radius: 12px; }
.compare-table tr:last-child td { border-bottom: none; }

/* 数据背书 */
.data-sec { background: linear-gradient(135deg, var(--grad-dark) 0%, var(--grad-mid) 100%); padding: 80px 0; margin: 40px 0; color: #FFF; border-radius: 40px; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; align-items: center; text-align: center; }
.data-item h4 { font-size: 56px; font-weight: 900; margin-bottom: 10px; }
.data-item p { font-size: 16px; font-weight: 500; opacity: 0.9; letter-spacing: 1px; }
.data-icon { width: 90px; height: 90px; background: rgba(255,255,255,0.1); border-radius: 24px; padding: 20px; backdrop-filter: blur(10px); }
.data-icon img { filter: brightness(0) invert(1); }

/* 下载版本区 */
.dl-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { background: #FFF; padding: 40px; border-radius: 24px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.05); transition: 0.3s; border: 2px solid transparent; }
.dl-card:hover { transform: translateY(-10px); border-color: var(--grad-light); box-shadow: 0 20px 40px rgba(16, 185, 129, 0.15); }
.dl-card h3 { font-size: 24px; font-weight: 800; color: var(--grad-dark); margin-bottom: 16px; }
.dl-card p { font-size: 15px; color: var(--text-gray); margin-bottom: 32px; height: 48px; }
.dl-card .btn { width: 100%; border: 1px solid var(--grad-light); color: var(--grad-dark); background: transparent; box-shadow: none; }
.dl-card .btn:hover { background: var(--grad-light); color: #FFF; }
.dl-card.pro { background: linear-gradient(135deg, #ECFDF5, #FFF); border-color: var(--grad-light); }
.dl-card.pro .btn { background: var(--grad-mid); color: #FFF; }

/* FAQ */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { background: #FFF; border-radius: 16px; padding: 30px; margin-bottom: 20px; box-shadow: 0 5px 15px rgba(0,0,0,0.03); border-left: 4px solid var(--grad-light); transition: 0.3s; }
.faq-item:hover { transform: translateX(5px); box-shadow: 0 10px 25px rgba(0,0,0,0.05); }
.faq-item h4 { font-size: 18px; font-weight: 700; color: var(--grad-dark); margin-bottom: 12px; }
.faq-item p { font-size: 15px; color: var(--text-gray); line-height: 1.7; }

/* Footer */
.footer { padding: 40px 20px; text-align: center; color: var(--text-gray); font-size: 14px; margin-top: 40px; border-top: 1px solid #E2E8F0; }