:root {
    --primary: var(--primary);
    /* 红酒色 */
    --gray: #f4f4f4;
    --text: #333;
    --border: #eee;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #fff;
    margin: 0;
    /* 关键：给顶部和底部留出空间，防止内容被遮挡 */
    padding-top: 60px;
    padding-bottom: 70px;
    color: var(--text);
    -webkit-tap-highlight-color: transparent;
    /* 去除点击高亮 */
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* --- 1. App Header (顶部) --- */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: #fff;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    box-sizing: border-box;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
}

.header-left {
    min-width: 40px;
    justify-content: flex-start;
}

.header-right {
    gap: 18px;
    min-width: 40px;
    justify-content: flex-end;
}

.header-title {
    flex: 1;
    text-align: center;
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 1px;
}

.header-title img {
    vertical-align: middle;
}

.icon-btn {
    font-size: 20px;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- 2. App Bottom Nav (底部导航栏) --- */
.app-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: #fff;
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.03);
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 10px;
    flex: 1;
    height: 100%;
    position: relative;
}

.tab-item i {
    font-size: 20px;
    margin-bottom: 4px;
}

.tab-item.active {
    color: var(--primary);
}

.cart-badge {
    position: absolute;
    top: 5px;
    right: 20px;
    /* 根据图标位置微调 */
    background: var(--primary);
    color: white;
    font-size: 10px;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 3px;
}

/* --- 3. Mobile Sidebar (侧滑菜单) --- */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-panel {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100%;
    background: white;
    z-index: 2001;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
}

.sidebar-panel.active {
    left: 0;
}

.sidebar-head {
    background: var(--primary);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 25px 20px;
}

.sidebar-list a {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid #f9f9f9;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-list i {
    width: 20px;
    text-align: center;
    color: #999;
}

/* 通用工具类 */
.container {
    padding: 15px;
}

.section-title {
    font-size: 16px;
    font-weight: bold;
    margin: 20px 0 10px;
    border-left: 3px solid var(--primary);
    padding-left: 10px;
}