/* 全局变量：定义品牌色 (柚子主题) */
:root {
    --primary-color: #FFD700;
    /* 柚子黄 */
    --primary-dark: #FFA500;
    --accent-color: #9ACD32;
    /* 清新绿 */
    --text-main: #1D1D1F;
    --text-secondary: #86868B;
    --bg-gradient: linear-gradient(135deg, #FFF9E6 0%, #F0FFF4 100%);
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.8);
    --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.06);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--bg-gradient);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    /* 防止横向滚动 */
}

/* 导航栏 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.logo span {
    color: var(--primary-dark);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    margin-left: 30px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-main);
}

.nav-links a.active {
    color: var(--text-main);
    font-weight: 600;
}

/* 首页 Hero 区域 */
.hero {
    padding: 160px 20px 100px;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    font-size: 56px;
    line-height: 1.1;
    background: linear-gradient(45deg, #1D1D1F, #4A4A4A);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    background: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 18px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* 手机模型展示区 */
.mockup-container {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    /* 根据截图比例可能需要调整，假设是通用的长屏 */
    background: #000;
    border-radius: 40px;
    border: 12px solid #1D1D1F;
    overflow: hidden;
    position: relative;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.1);
    z-index: 2;
}

/* 优化后的灵动岛：位置更高，颜色更自然 */
.phone-mockup::after {
    content: '';
    position: absolute;
    top: 6px;
    /* 向上移动了一点 */
    left: 50%;
    transform: translateX(-50%);
    width: 75px;
    /* 稍微调小一点，显得精致 */
    height: 20px;
    background: #1D1D1F;
    /* 使用深炭灰色，不那么死黑 */
    border-radius: 10px;
    z-index: 10;
}

/* 模拟 App 内容 - 直接展示截图 */
.mockup-screen {
    width: 100%;
    height: 100%;
    background: #000;
    padding: 0;
    overflow: hidden;
}

.screen-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center -4px;
    /* 微调：向上移动 4px 以达到最佳居中效果 */
    display: block;
}

/* 装饰性光晕 */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    z-index: 1;
    opacity: 0.6;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-color);
    top: -50px;
    right: -50px;
    animation: float 6s ease-in-out infinite;
}

.blob-2 {
    width: 250px;
    height: 250px;
    background: var(--accent-color);
    bottom: -50px;
    left: 0px;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(20px, -20px);
    }

    100% {
        transform: translate(0, 0);
    }
}

/* 文字页面 (隐私/支持) */
.content-page {
    max-width: 800px;
    margin: 140px auto 60px;
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
}

.content-page h1 {
    margin-bottom: 30px;
    font-size: 36px;
}

.content-page h2 {
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 24px;
}

.content-page p {
    margin-bottom: 15px;
    color: #444;
}

.footer {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: auto;
}

/* 响应式 */
@media (max-width: 768px) {
    nav {
        padding: 10px 20px;
    }

    .logo {
        font-size: 22px;
        gap: 8px;
    }

    .logo img {
        width: 38px;
        height: 38px;
    }

    .nav-links a {
        margin-left: 12px;
        font-size: 16px;
    }

    .hero {
        flex-direction: column;
        padding-top: 80px;
        text-align: center;
    }

    .hero h1 {
        font-size: 32px;
    }

    .content-page {
        margin: 80px 15px 30px;
        padding: 20px;
    }
}