/*
 * -----------------------------------------------------------
 * 极简风格 - 全局设置与排版
 * -----------------------------------------------------------
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* 极简配色方案 - 黑白灰体系 */
    --color-primary: #18181B; /* 深灰/黑 */
    --color-secondary: #3F3F46; /* 中灰 */
    --color-cta: #2563EB; /* 蓝色按钮 */
    --color-text-dark: #09090B; /* 接近黑 */
    --color-text-muted: #52525B; /* 柔和灰 */
    --color-background-white: #FFFFFF;
    --color-background-light-gray: #FAFAFA; /* 浅灰白背景 */
    --color-border: #E4E4E7; /* 浅灰边框 */

    /* 排版 - Inter 字体 */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --nav-height: 44px;
}

body {
    font-family: var(--font-family-base);
    color: var(--color-text-dark);
    background-color: var(--color-background-light-gray);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-dark);
    font-weight: 600;
    letter-spacing: -0.02em;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-secondary);
    text-decoration: none;
}

/*
 * -----------------------------------------------------------
 * 顶部导航栏 - 极简风格
 * -----------------------------------------------------------
 */

.apple-navbar {
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1030;
}

.apple-navbar a {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-dark);
    opacity: 0.7;
    padding: 0 16px;
    transition: opacity 0.2s ease;
}

.apple-navbar a:hover {
    opacity: 1;
    color: var(--color-text-dark);
}

.apple-navbar .fw-bold {
    font-weight: 600 !important;
    opacity: 1;
}

/*
 * -----------------------------------------------------------
 * 按钮样式 - 极简风格
 * -----------------------------------------------------------
 */

.btn-apple {
    background-color: var(--color-text-dark);
    color: var(--color-background-white);
    font-weight: 500;
    border-radius: 8px;
    padding: 12px 24px;
    border: none;
    font-size: 15px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.btn-apple:hover {
    background-color: var(--color-secondary);
    color: var(--color-background-white);
}

.btn-outline-secondary {
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-dark);
    border-color: var(--color-border);
    background-color: transparent;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-outline-secondary:hover {
    background-color: var(--color-background-light-gray);
    color: var(--color-text-dark);
    border-color: var(--color-border);
}

/*
 * -----------------------------------------------------------
 * 布局区块 - 极简风格
 * -----------------------------------------------------------
 */

/* 英雄区 (Hero Section) */
.hero-section {
    padding: 140px 0;
    text-align: center;
    background-color: var(--color-background-white);
}

.hero-section h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-section p.lead {
    font-size: 20px;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    font-weight: 400;
}

/* 应用卡片区 (App Cards) */
.app-card-section {
    padding: 100px 0;
}

.app-card {
    background-color: var(--color-background-white);
    padding: 48px 40px;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    text-align: center;
    cursor: default;
}

/* 桌面端卡片悬停效果 - 仅颜色变化，无位移 */
.d-sm-flex .app-card:hover {
    border-color: var(--color-secondary);
    background-color: #FAFAFA;
}

.app-card h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.app-card .card-text {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
    min-height: 85px;
    margin-bottom: 0;
    font-weight: 400;
}

/* 应用卡片主题风格 */
/* 记密码 - 专业蓝风格 */
.app-card-password {
    border-color: #BFDBFE;
}

.app-card-password:hover {
    border-color: #3B82F6 !important;
    background-color: #EFF6FF !important;
}

.app-card-password h3 {
    color: #1E40AF;
}

/* 囤囤鼠 - 温暖橙风格 */
.app-card-storage {
    border-color: #FED7AA;
}

.app-card-storage:hover {
    border-color: #F59E0B !important;
    background-color: #FFF7ED !important;
}

.app-card-storage h3 {
    color: #D97706;
}

/* 极简记物核心功能区 (Features) */
.feature-section {
    padding: 100px 0;
    background-color: var(--color-background-white);
}

.feature-section h2 {
    margin-bottom: 70px;
}

.feature-item i {
    font-size: 40px;
    margin-bottom: 20px;
    color: var(--color-text-dark);
}

.feature-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-item p {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.7;
}

/* 用户评价区 (Reviews) */
#reviews {
    padding: 100px 0;
    background-color: var(--color-background-light-gray);
}

#reviews .border {
    border: 1px solid var(--color-border) !important;
    border-radius: 12px;
    background-color: var(--color-background-white);
}

#reviews p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-dark);
}

#reviews strong {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* 联系区 (Contact) */
.contact-section {
    padding: 100px 0;
    text-align: center;
    background-color: var(--color-background-white);
}

.contact-section h2 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.contact-section p.lead {
    color: var(--color-text-muted);
    font-size: 17px;
}

/*
 * -----------------------------------------------------------
 * 页脚 - 极简风格
 * -----------------------------------------------------------
 */

footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    font-size: 13px;
    color: var(--color-text-muted);
    background-color: var(--color-background-white);
}


/*
 * -----------------------------------------------------------
 * 移动端 UI 优化 - 极简风格
 * -----------------------------------------------------------
 */
@media (max-width: 767px) {

    /* 移动端排版优化 */
    .apple-navbar a {
        padding: 0 12px;
    }

    .hero-section {
        padding: 100px 20px;
    }

    .hero-section h1 {
        font-size: 36px;
        letter-spacing: -0.02em;
    }

    .hero-section p.lead {
        font-size: 17px;
        max-width: 90%;
        margin-bottom: 32px;
    }

    h2 {
        font-size: 28px !important;
        letter-spacing: -0.01em;
    }

    /* 减少 Sections 之间的垂直留白 */
    .app-card-section, .feature-section, #reviews, .contact-section {
        padding: 60px 0;
    }

    /* 移动端功能和评价卡片留白优化 */
    .feature-item {
        padding: 0 20px;
        margin-bottom: 40px;
    }

    #reviews .col-md-4 {
        margin-top: 16px;
    }

    #reviews .p-4 {
        padding: 20px !important;
    }
}


/*
 * -----------------------------------------------------------
 * 移动端 Banner 优化 - 极简风格
 * -----------------------------------------------------------
 */

@media (max-width: 575.98px) {
    /* 针对 XS 设备 */
    .app-card-slider {
        display: flex;
        overflow-x: scroll;
        scroll-snap-type: x mandatory;
        padding-bottom: 20px;
        margin-left: 0;
        margin-right: 0;
        padding-left: 20px;
        padding-right: 20px;
    }

    /* 隐藏滚动条 */
    .app-card-slider::-webkit-scrollbar {
        display: none;
    }

    .app-card-slider {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    /* 定义每个应用卡片的宽度和吸附点 */
    .app-slide {
        width: 65vw;
        flex: 0 0 65vw;
        margin-right: 16px;
        scroll-snap-align: start;
        padding: 36px 24px;
        border: 1px solid var(--color-border);
        box-shadow: none;
    }

    /* 调整最后一个卡片 */
    .app-slide:last-child {
        margin-right: 0;
        padding-right: 36px;
    }

    /* 移动端卡片文本调整 */
    .app-card h3 {
        font-size: 24px;
    }

    .app-card .card-text {
        font-size: 14px;
        min-height: auto;
    }
}


/*
 * -----------------------------------------------------------
 * 模态框样式 - 极简风格
 * -----------------------------------------------------------
 */

/* 确保 modal-backdrop 默认隐藏，由 JS 控制显示 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--color-background-white);
    max-width: 400px;
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.modal-content h4 {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: -0.01em;
}

.close-button {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-text-muted);
    line-height: 1;
    cursor: pointer;
    padding: 0 8px;
    transition: color 0.2s ease;
}

.close-button:hover {
    color: var(--color-text-dark);
}

.store-options .btn {
    width: 100%;
    margin-bottom: 12px;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
}

.store-options .btn img {
    margin-right: 10px;
}

.store-options .btn-secondary {
    background-color: var(--color-text-dark);
    border-color: var(--color-text-dark);
    color: white;
}

.store-options .btn-secondary:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

/* 平台按钮样式 - 极简风格 */
.btn-platform {
    background-color: var(--color-background-white);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 10px 14px;
    transition: all 0.2s ease;
    flex: 1;
    max-width: 80px;
    cursor: pointer;
}

.btn-platform:hover {
    background-color: var(--color-background-light-gray);
    border-color: var(--color-secondary);
}