/* ==========================================================================
   homes2 产品页面公共样式
   适用于：homes2 系列产品展示页面（概览、设计、功能、参数、案例等）
   ========================================================================== */

/* CSS变量定义 */
:root {
    --primary-color: #0071e3;
    --secondary-color: #00a0dc;
    --text-dark: #1d1d1f;
    --text-light: #6e6e73;
    --bg-white: #ffffff;
    --bg-light: #f5f5f7;
    --border-color: #d2d2d7;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --transition-normal: all 0.3s ease;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: auto; /* 禁用默认平滑滚动，由JS控制 */
    overflow-x: hidden;
    overflow-y: auto;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
    position: relative;
    /* 为主导航和子导航预留空间 */
    padding-top: calc(44px + 48px);
}

/* ==========================================================================
   产品子导航样式
   ========================================================================== */

.product-subnav {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 44px;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.subnav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.subnav-menu {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 0;
}

.subnav-item {
    margin: 0;
}

.subnav-item a {
    display: block;
    padding: 8px 20px;
    text-decoration: none;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-normal);
    border-radius: 20px;
    white-space: nowrap;
}

.subnav-item a:hover,
.subnav-item.active a {
    color: var(--primary-color);
    background: rgba(0, 113, 227, 0.08);
}

/* ==========================================================================
   滚动指示器样式
   ========================================================================== */

.scroll-indicator {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 12px;
    /* 添加半透明深色背景，确保在浅色背景上可见 */
    background: rgba(0, 0, 0, 0.4);
    padding: 15px 10px;
    border-radius: 20px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.scroll-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    /* 使用白色背景和深色边框，提高对比度 */
    background: rgba(255, 255, 255, 0.6);
    border: 2px solid rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: var(--transition-normal);
    /* 添加阴影增强立体感 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2),
                0 0 0 1px rgba(255, 255, 255, 0.3);
}

.scroll-dot.active {
    /* 激活状态：纯白色背景，深色边框 */
    background: white;
    border-color: rgba(0, 0, 0, 0.7);
    transform: scale(1.3);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3),
                0 0 0 2px rgba(255, 255, 255, 0.5),
                0 0 12px rgba(255, 255, 255, 0.4);
}

.scroll-dot:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.6);
    transform: scale(1.15);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(255, 255, 255, 0.4);
}

/* ==========================================================================
   响应式适配
   ========================================================================== */

/* 平板端适配 */
@media (max-width: 1024px) {
    .subnav-menu {
        gap: 4px;
    }
    
    .subnav-item a {
        padding: 6px 16px;
        font-size: 13px;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        height: auto;
        min-height: 100vh;
    }
    
    body {
        /* 移动端主导航和子导航总高度 */
        padding-top: calc(48px + 48px);
    }
    
    .product-subnav {
        top: 48px;
        z-index: 999;
    }
    
    .subnav-container {
        padding: 0 10px;
    }
    
    .subnav-menu {
        justify-content: flex-start;
        flex-wrap: nowrap; /* 强制不换行 */
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 6px;
        padding: 10px 0;
        /* 添加渐变遮罩效果，提示可滚动 */
        mask-image: linear-gradient(to right, transparent 0, black 10px, black calc(100% - 10px), transparent 100%);
        -webkit-mask-image: linear-gradient(to right, transparent 0, black 10px, black calc(100% - 10px), transparent 100%);
    }
    
    .subnav-menu::-webkit-scrollbar {
        display: none;
    }
    
    .subnav-item {
        flex-shrink: 0; /* 防止项目被压缩 */
    }
    
    .subnav-item a {
        padding: 6px 14px;
        font-size: 13px;
        white-space: nowrap;
    }
    
    .scroll-indicator {
        right: 15px;
        gap: 10px;
        /* 移动端调整padding和圆角 */
        padding: 12px 8px;
        border-radius: 16px;
    }
    
    .scroll-dot {
        width: 8px;
        height: 8px;
    }
}

/* 小屏幕手机 */
@media (max-width: 480px) {
    body {
        /* 小屏主导航和子导航总高度 */
        padding-top: calc(48px + 43px);
    }
    
    .product-subnav {
        top: 48px;
        z-index: 999;
    }
    
    .subnav-container {
        padding: 0 8px;
    }
    
    .subnav-menu {
        gap: 4px;
        padding: 8px 0;
    }
    
    .subnav-item a {
        padding: 5px 10px;
        font-size: 12px;
    }
    
    .scroll-indicator {
        right: 10px;
        /* 小屏手机调整padding、圆角和gap */
        padding: 10px 6px;
        border-radius: 14px;
        gap: 8px;
    }
    
    .scroll-dot {
        width: 6px;
        height: 6px;
    }
}