:root {
    --fluid-green: #00CBA9;
    --fluid-green-light: #CCF5EE;
    --fluid-green-dark: #00997F;
    --fluid-blue: #00A3FF;
    --bg-white: #FFFFFF;
    --bg-gray: #F4F9F8;
    --text-main: #2D3748;
    --text-muted: #718096;
    --shadow-fluid: 0 10px 30px rgba(0, 203, 169, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Helvetica Neue", sans-serif; color: var(--text-main); background: var(--bg-white); line-height: 1.7; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: 0.3s ease; }
img { max-width: 100%; border-radius: 16px; }

/* 导航 */
.header { background: rgba(255,255,255,0.9); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 1000; 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: 76px; padding: 0 20px; }
.logo { font-size: 22px; font-weight: 800; color: var(--fluid-green-dark); display: flex; align-items: center; gap: 10px; }
.logo img { width: 36px; height: 36px; }
.nav-links { display: flex; gap: 40px; }
.nav-links a { font-size: 16px; font-weight: 500; color: var(--text-main); position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--fluid-green); }
.nav-links a::after { content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); width: 0; height: 3px; background: var(--fluid-green); transition: 0.3s; border-radius: 3px; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; position: relative; z-index: 2; }

/* 按钮 - 流体圆润风 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0 36px; height: 50px; border-radius: 25px; font-size: 16px; font-weight: 600; cursor: pointer; transition: 0.3s; }
.btn-primary { background: linear-gradient(135deg, var(--fluid-green) 0%, var(--fluid-blue) 100%); color: #fff; box-shadow: var(--shadow-fluid); border: none; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 15px 30px rgba(0, 163, 255, 0.3); }
.btn-outline { background: #fff; color: var(--fluid-green-dark); border: 2px solid var(--fluid-green); box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.btn-outline:hover { background: var(--fluid-green-light); transform: translateY(-3px); }

/* 首屏流体背景 */
.hero { position: relative; padding: 100px 0 160px; background: linear-gradient(180deg, var(--fluid-green-light) 0%, #ffffff 100%); overflow: hidden; }
.hero-bg-shape { position: absolute; top: -20%; left: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(0, 203, 169, 0.2) 0%, transparent 60%); border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; animation: morph 15s infinite linear; z-index: 1; }
.hero-bg-shape2 { position: absolute; bottom: 10%; right: -5%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(0, 163, 255, 0.15) 0%, transparent 60%); border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; animation: morph 12s infinite reverse linear; z-index: 1; }
@keyframes morph {
    0% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; transform: rotate(0deg); }
    50% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
    100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; transform: rotate(360deg); }
}

.hero-wrap { display: flex; align-items: center; gap: 60px; max-width: 1200px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 2; }
.hero-content { flex: 1; }
.hero-content h1 { font-size: 56px; font-weight: 800; color: var(--text-main); margin-bottom: 20px; line-height: 1.2; letter-spacing: -0.5px; }
.hero-content .subtitle { font-size: 26px; font-weight: 600; background: linear-gradient(135deg, var(--fluid-green), var(--fluid-blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 30px; }
.hero-content .desc { font-size: 16px; color: var(--text-muted); margin-bottom: 40px; line-height: 1.8; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1.2; }
.hero-visual img { box-shadow: 0 30px 60px rgba(0, 203, 169, 0.15); border-radius: 20px; position: relative; z-index: 2; border: 4px solid #fff; }

/* SVG 波浪分隔 */
.wave-divider { position: absolute; bottom: 0; left: 0; width: 100%; overflow: hidden; line-height: 0; z-index: 1; }
.wave-divider svg { position: relative; display: block; width: calc(137% + 1.3px); height: 100px; }
.wave-divider .shape-fill { fill: #ffffff; }

/* 模块标题 */
.sec-title { text-align: center; font-size: 36px; font-weight: 800; margin-bottom: 60px; color: var(--text-main); position: relative; }
.sec-title::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(90deg, var(--fluid-green), var(--fluid-blue)); margin: 15px auto 0; border-radius: 2px; }

/* 核心卖点 - 流体卡片 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.f-card { background: #fff; padding: 40px 20px; border-radius: 24px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.03); transition: 0.4s; position: relative; overflow: hidden; border: 1px solid #E2E8F0; }
.f-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(180deg, var(--fluid-green-light) 0%, transparent 100%); opacity: 0; transition: 0.4s; z-index: 0; }
.f-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-fluid); border-color: var(--fluid-green-light); }
.f-card:hover::before { opacity: 1; }
.f-card img, .f-card h3, .f-card p { position: relative; z-index: 1; }
.f-card img { width: 56px; height: 56px; margin: 0 auto 20px; filter: drop-shadow(0 4px 6px rgba(0,203,169,0.3)); }
.f-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--fluid-green-dark); }
.f-card p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 */
.detail-box { display: flex; align-items: center; gap: 80px; margin-bottom: 80px; padding: 40px; background: #fff; border-radius: 32px; box-shadow: 0 10px 40px rgba(0,0,0,0.02); }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 30px; font-weight: 800; margin-bottom: 20px; color: var(--text-main); }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; line-height: 1.8; }
.d-data { display: inline-flex; padding: 8px 20px; background: var(--fluid-green-light); color: var(--fluid-green-dark); font-weight: 700; border-radius: 20px; font-size: 15px; }
.d-visual { flex: 1.2; position: relative; }
.d-visual img { border-radius: 24px; box-shadow: 0 20px 40px rgba(0,203,169,0.1); }
.d-visual::after { content: ''; position: absolute; inset: -20px; background: radial-gradient(circle, var(--fluid-green-light) 0%, transparent 60%); z-index: -1; }

/* 浏览器对比 */
.compare-wrap { background: #fff; border-radius: 24px; box-shadow: 0 10px 40px rgba(0,0,0,0.03); padding: 40px; overflow: hidden; border: 1px solid #E2E8F0; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px 24px; border-bottom: 1px solid #E2E8F0; }
.compare-table th { color: var(--text-muted); font-size: 15px; font-weight: 500; background: #F8FAFC; }
.compare-table td { font-size: 16px; font-weight: 500; }
.compare-table .hl { background: var(--fluid-green-light); color: var(--fluid-green-dark); font-weight: 800; border-radius: 12px; }
.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 { background: #fff; padding: 50px 30px; border-radius: 24px; text-align: center; border: 1px solid #E2E8F0; transition: 0.4s; }
.dl-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-fluid); }
.dl-card.rec { border: 2px solid var(--fluid-green); box-shadow: 0 15px 40px rgba(0,203,169,0.1); background: linear-gradient(180deg, #fff 0%, var(--fluid-green-light) 200%); }
.dl-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 15px; color: var(--text-main); }
.dl-card p { font-size: 15px; color: var(--text-muted); margin-bottom: 30px; height: 45px; }
.dl-card .btn { width: 100%; }

/* 数据背书 */
.data-sec { display: flex; justify-content: space-around; background: linear-gradient(135deg, var(--fluid-green) 0%, var(--fluid-blue) 100%); padding: 60px 40px; border-radius: 24px; color: #fff; margin: 80px 0; box-shadow: var(--shadow-fluid); position: relative; overflow: hidden; }
.data-sec::before { content: ''; position: absolute; top: 0; right: 0; width: 300px; height: 300px; background: rgba(255,255,255,0.1); border-radius: 50%; top: -100px; right: -50px; }
.data-item { text-align: center; position: relative; z-index: 1; }
.data-item h4 { font-size: 52px; font-weight: 900; margin-bottom: 10px; text-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.data-item p { font-size: 16px; font-weight: 500; opacity: 0.9; }

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.faq-box { background: #fff; border-radius: 16px; padding: 30px; border: 1px solid #E2E8F0; transition: 0.3s; }
.faq-box:hover { border-color: var(--fluid-green); box-shadow: 0 4px 20px rgba(0,203,169,0.1); }
.faq-box h4 { font-size: 18px; font-weight: 700; color: var(--fluid-green-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.faq-box h4::before { content: ''; display: inline-block; width: 8px; height: 8px; background: var(--fluid-blue); border-radius: 50%; }
.faq-box p { font-size: 15px; color: var(--text-muted); line-height: 1.6; padding-left: 18px; }

/* Footer */
.footer { text-align: center; padding: 40px; color: var(--text-muted); font-size: 14px; margin-top: 60px; background: var(--bg-gray); }