/**
 * 光速数卡 - 样式表
 * 版本: 1.0
 * 分离自 index.php
 */

/* ============ 基础重置 ============ */
*{box-sizing:border-box;margin:0;padding:0;}
body{
    font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    min-height:100vh;
    color:#222;
}

/* ============ 头部导航 ============ */
header{
    background:rgba(255,255,255,0.95);
    backdrop-filter:blur(10px);
    padding:12px 20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
    box-shadow:0 1px 3px rgba(0,0,0,0.1);border-bottom:1px solid #eee;
}
header .logo{
    font-weight:700;
    font-size:20px;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
    white-space:nowrap;
    flex:1;
}
header nav{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:5px;
    flex-wrap:wrap;
    flex:2;
}
header nav a{
    color:#555;
    text-decoration:none;
    font-size:14px;
    padding:6px 12px;
    border-radius:6px;
    transition:all .2s;
    white-space:nowrap;
}
header nav a:hover{
    color:#667eea;
    background:rgba(102,126,234,0.1);
}
header .user-info{
    display:flex;
    align-items:center;
    gap:8px;
    padding:6px 12px;
    background:linear-gradient(135deg,#f8f9fa 0%,#e9ecef 100%);
    border-radius:20px;
    font-size:13px;
    flex-wrap:wrap;
    flex:1;
    justify-content:flex-end;
}
header .user-info .username{
    color:#495057;
    font-weight:500;
}
header .user-info .balance{
    color:#28a745;
    font-weight:600;
}
header .logout-btn{
    background:none;
    border:none;
    color:#dc3545;
    cursor:pointer;
    font-size:13px;
    padding:4px 8px;
    border-radius:4px;
    transition:all .2s;
}
header .logout-btn:hover{
    background:rgba(220,53,69,0.1);
}

/* ============ 主内容区 ============ */
main{
    max-width:1100px;
    margin:25px auto;
    background:#fff;
    padding:25px;
    border-radius:12px;
    box-shadow:0 2px 12px rgba(0,0,0,0.08);border:1px solid #e5e5e5;
}
h2{font-size:24px;margin-bottom:15px;color:#333;}
h3{font-size:18px;margin:18px 0 12px;color:#444;}
p{margin:8px 0;font-size:14px;line-height:1.7;}

/* ============ 公告样式 ============ */
.announcement{
    background:linear-gradient(135deg,#fff5f5 0%,#fff0f0 100%);
    border-left:4px solid #ff6b6b;
    padding:15px 20px;
    border-radius:0 8px 8px 0;
    margin-bottom:25px;
    position:relative;
}
.announcement::before{
    content:'📢';
    font-size:20px;
    margin-right:10px;
}
.announcement-title{
    font-weight:600;
    color:#d63031;
    display:inline;
}
.announcement-content{
    color:#555;
    margin-top:8px;
    line-height:1.8;
}

/* ============ 分类标签 ============ */
.category-tabs{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:20px;
    padding-bottom:15px;
    border-bottom:2px solid #f0f0f0;
}
.category-tab{
    padding:8px 20px;
    background:#f5f5f5;
    border:none;
    border-radius:20px;
    cursor:pointer;
    font-size:14px;
    transition:all .3s;
    text-decoration:none;
    color:#555;
}
.category-tab:hover,.category-tab.active{
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;
}

/* ============ 表格 ============ */
table{
    width:100%;
    border-collapse:collapse;
    margin:12px 0;
    font-size:14px;
}
th,td{
    border:1px solid #e0e0e0;
    padding:12px;
    text-align:left;
}
th{background:#f8f9fa;font-weight:600;}
tr:hover{background:#f8f9fa;}

/* ============ 表单元素 ============ */
input,textarea,select{
    padding:10px 12px;
    border:1px solid #d0d0d0;
    border-radius:6px;
    font-size:14px;
    width:100%;
    margin-top:4px;
    transition:all .3s;
}
input:focus,textarea:focus,select:focus{
    outline:none;
    border-color:#667eea;
    box-shadow:0 0 0 3px rgba(102,126,234,0.1);
}
textarea{resize:vertical;min-height:100px;}

/* ============ 按钮 ============ */
button,.btn{
    padding:10px 20px;
    border:none;
    border-radius:6px;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;
    font-size:14px;
    cursor:pointer;
    text-decoration:none;
    display:inline-block;
    margin:4px 4px 4px 0;
    transition:all .3s;
}
button:hover,.btn:hover{
    transform:translateY(-2px);
    box-shadow:0 5px 20px rgba(102,126,234,0.4);
}
button:disabled{background:#ccc;cursor:not-allowed;transform:none;box-shadow:none;}
.btn.secondary{background:#6c757d;}
.btn.secondary:hover{background:#545b62;box-shadow:0 5px 20px rgba(108,117,125,0.4);}
.btn.danger{background:linear-gradient(135deg,#ff6b6b 0%,#ee5a5a 100%);}
.btn.success{background:linear-gradient(135deg,#00b894 0%,#00cec9 100%);}

/* ============ 支付方式 ============ */
.payment-option{transition:all .2s ease;}
.payment-option:hover{border-color:#667eea !important;background:rgba(102,126,234,0.05);}
.payment-option.selected{border-color:#667eea !important;background:rgba(102,126,234,0.1);box-shadow:0 0 0 3px rgba(102,126,234,0.2);}
.payment-option input[type=radio]{accent-color:#667eea;}

/* ============ 提示信息 ============ */
.notice{
    padding:14px 18px;
    border-radius:8px;
    margin-bottom:18px;
    font-size:14px;
}
.notice.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb;}
.notice.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb;}
.notice.warning{background:#fff3cd;color:#856404;border:1px solid #ffeaa7;}

/* ============ 表单组 ============ */
.form-group{margin-bottom:18px;}
.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:14px;color:#444;}

/* ============ 卡片 ============ */
.card{
    border:1px solid #e8e8e8;
    border-radius:10px;
    padding:20px;
    margin-bottom:18px;
    background:#fff;
    transition:all .3s;
}
.card:hover{box-shadow:0 5px 25px rgba(0,0,0,0.1);}

/* ============ 商品卡片 ============ */
.product-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
    gap:20px;
}
.product-card{
    border:1px solid #e8e8e8;
    border-radius:12px;
    padding:20px;
    background:#fff;
    transition:all .3s;
    position:relative;
    overflow:hidden;
}
.product-card:hover{
    transform:translateY(-5px);
    box-shadow:0 10px 30px rgba(0,0,0,0.12);
}
.product-card .category-badge{
    position:absolute;
    top:15px;
    right:15px;
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;
    padding:4px 12px;
    border-radius:15px;
    font-size:12px;
}
.product-card h3{
    color:#2d3436;
    margin-bottom:10px;
    font-size:18px;
}
.product-card .desc{
    color:#636e72;
    font-size:13px;
    min-height:45px;
    line-height:1.6;
}
.product-card .price{
    font-size:28px;
    color:#d63031;
    font-weight:700;
    margin:15px 0;
}
.product-card .stock{
    font-size:13px;
    color:#636e72;
    margin-bottom:15px;
}
.product-card .buy-btn{
    width:100%;
    text-align:center;
    padding:12px;
    border-radius:8px;
}

/* ============ 统计卡片 ============ */
.stats{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
    gap:18px;
    margin:22px 0;
}
.stat-card{
    background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    color:#fff;
    padding:22px;
    border-radius:12px;
    text-align:center;
}
.stat-card h4{font-size:14px;opacity:.9;margin-bottom:10px;}
.stat-card .value{font-size:32px;font-weight:700;}

/* ============ 库存状态 ============ */
.stock-high{color:#28a745;}
.stock-normal{color:#17a2b8;}
.stock-low{color:#ffc107;}
.stock-empty{color:#dc3545;}
.stock-unknown{color:#6c757d;}

/* ============ 页脚 ============ */
footer{
    text-align:center;
    padding:25px;
    color:rgba(255,255,255,0.8);
    font-size:13px;
}

/* ============ 响应式设计 ============ */
@media (max-width:768px){
    /* 头部优化 */
    header{
        padding:10px 12px;
        flex-wrap:wrap;
        gap:8px;
    }
    header .logo{
        font-size:16px;
        flex:none;
        width:auto;
        text-align:left;
        margin-bottom:0;
    }
    header nav{
        flex:none;
        width:100%;
        justify-content:center;
        order:2;
        gap:8px;
        overflow-x:auto;
        -webkit-overflow-scrolling:touch;
        scrollbar-width:none;
        padding-bottom:5px;
    }
    header nav::-webkit-scrollbar{display:none;}
    header nav a{
        font-size:15px;
        padding:8px 12px;
        flex-shrink:0;
    }
    header .user-info{
        flex:1;
        width:auto;
        justify-content:flex-end;
        margin-top:0;
        padding:5px 10px;
        order:1;
        font-size:12px;
        gap:6px;
    }
    header .user-info .username{display:none;}
    header .logout-btn{font-size:12px;padding:3px 6px;}

    /* 主内容区优化 */
    main{
        margin:10px;
        padding:15px;
        border-radius:10px;
    }
    h2{font-size:20px;margin-bottom:12px;}
    h3{font-size:16px;margin:15px 0 10px;}
    p{font-size:13px;}

    /* 公告优化 */
    .announcement{
        padding:12px 15px;
        margin-bottom:18px;
    }
    .announcement::before{font-size:16px;}
    .announcement-title{font-size:14px;}
    .announcement-content{font-size:13px;line-height:1.7;}

    /* 分类标签优化 - 自动换行 */
    .category-tabs{
        flex-wrap:wrap;
        gap:8px;
        padding-bottom:12px;
        margin-bottom:15px;
    }
    .category-tab{
        padding:8px 16px;
        font-size:13px;
    }

    /* 表格优化 */
    table{
        font-size:12px;
        display:block;
        overflow-x:auto;
        -webkit-overflow-scrolling:touch;
    }
    th,td{
        padding:10px 8px;
        white-space:nowrap;
    }

    /* 表单优化 */
    input,textarea,select{
        padding:12px;
        font-size:16px; /* 防止iOS缩放 */
    }
    .form-group{margin-bottom:15px;}
    .form-group label{font-size:13px;}

    /* 按钮优化 */
    button,.btn{
        padding:12px 16px;
        font-size:14px;
        margin:3px 3px 3px 0;
    }

    /* 卡片优化 */
    .card{
        padding:15px;
        margin-bottom:15px;
        border-radius:8px;
    }

    /* 商品卡片优化 */
    .product-grid{
        grid-template-columns:1fr;
        gap:15px;
    }
    .product-card{
        padding:15px;
        border-radius:10px;
    }
    .product-card .category-badge{
        top:12px;
        right:12px;
        padding:3px 10px;
        font-size:11px;
    }
    .product-card h3{font-size:16px;}
    .product-card .desc{font-size:12px;min-height:36px;}
    .product-card .price{font-size:24px;margin:12px 0;}
    .product-card .stock{font-size:12px;margin-bottom:12px;}
    .product-card .buy-btn{padding:12px;font-size:14px;}

    /* 统计卡片优化 */
    .stats{
        grid-template-columns:1fr 1fr;
        gap:12px;
        margin:15px 0;
    }
    .stat-card{
        padding:15px 12px;
        border-radius:10px;
    }
    .stat-card h4{font-size:12px;margin-bottom:6px;}
    .stat-card .value{font-size:22px;}

    /* 提示信息优化 */
    .notice{
        padding:12px 15px;
        margin-bottom:15px;
        font-size:13px;
    }

    /* 页脚优化 */
    footer{
        padding:20px 15px;
        font-size:12px;
    }
}

/* ============ 小屏手机优化 (≤480px) ============ */
@media (max-width:480px){
    header .logo{font-size:15px;}
    header nav a{font-size:14px;padding:7px 10px;}
    header .user-info{
        padding:4px 8px;
        font-size:11px;
        border-radius:15px;
    }
    header .user-info .balance{font-size:12px;}

    main{margin:8px;padding:12px;}
    h2{font-size:18px;}
    h3{font-size:15px;}

    .category-tab{padding:7px 14px;font-size:12px;}

    table{font-size:11px;}
    th,td{padding:8px 6px;}

    .stats{grid-template-columns:1fr 1fr;gap:10px;}
    .stat-card{padding:12px 10px;}
    .stat-card h4{font-size:11px;}
    .stat-card .value{font-size:18px;}

    .product-card .price{font-size:22px;}
    .product-card .buy-btn{padding:10px;font-size:13px;}

    button,.btn{padding:10px 14px;font-size:13px;}
}

/* ============ 打印样式 ============ */
@media print{
    header,footer,.btn,button{display:none;}
    main{box-shadow:none;margin:0;padding:10px;}
    body{background:#fff;}
}