*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui, sans-serif;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

.header{height:76px;background:#fff;box-shadow:0 2px 8px #00000015;display:flex;align-items:center;}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;width:100%;}
.logo img{height:54px;}
.nav{display:flex;gap:32px;align-items:center;}
.nav a{text-decoration:none;color:#333;font-size:16px;}
.btn-admin{padding:8px 16px;background:#222;color:#fff;border-radius:4px;}

.banner{padding:120px 0;text-align:center;background:#f7f8fa;}
.banner h1{font-size:48px;margin-bottom:16px;color:#111;}
.banner p{font-size:20px;color:#555;margin-bottom:32px;}
.btn-primary{padding:14px 32px;background:#b81828;color:#fff;text-decoration:none;border-radius:6px;display:inline-block;border:none;cursor:pointer;font-size:16px;}

.version-section{padding:80px 0;}
.version-section h2{text-align:center;font-size:32px;margin-bottom:48px;}
.version-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.version-card{text-align:center;}
.version-img img{width:100%;max-height:320px;object-fit:contain;margin-bottom:20px;border-radius:8px;}
.version-card h3{font-size:24px;margin-bottom:12px;}
.version-card p{color:#555;}

.order-section{padding:80px 0;background:#f7f8fa;text-align:center;}
.order-form{max-width:500px;margin:0 auto;display:flex;flex-direction:column;gap:16px;}
.order-form input,.order-form select,.order-form textarea{padding:14px;border:1px solid #ddd;border-radius:6px;font-size:16px;}

.footer{padding:40px 0;text-align:center;background:#222;color:#fff;}
.footer img{height:48px;margin-bottom:16px;}

.admin-body{background:#f1f2f5;}
.admin-container{display:flex;height:100vh;}
.admin-sidebar{width:260px;background:#222;color:#fff;padding:30px 20px;}
.admin-logo img{height:46px;margin-bottom:30px;}
.admin-menu li{padding:14px 10px;margin-bottom:8px;border-radius:4px;cursor:pointer;}
.admin-menu li.active{background:#b81828;}
.admin-main{flex:1;padding:30px;overflow-y:auto;}
.admin-tab{display:none;}
.admin-tab.active{display:block;}
.form-item{background:#fff;padding:24px;border-radius:8px;margin-bottom:20px;}
.form-item label{display:block;margin-bottom:12px;font-weight:bold;font-size:16px;}
.preview-box{margin:16px 0;}
.preview-box img{max-height:180px;border:1px solid #eee;}
.btn-save{padding:10px 20px;background:#b81828;color:#fff;border:none;border-radius:4px;cursor:pointer;margin-top:8px;}

.order-table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;}
.order-table th,.order-table td{border:1px solid #eee;padding:12px;text-align:left;}
.order-table th{background:#f5f5f5;}
.btn-del{background:#dc3545;color:white;border:none;padding:6px 10px;border-radius:4px;cursor:pointer;}

.login-body{background:#f1f2f5;display:flex;align-items:center;justify-content:center;height:100vh;margin:0;}
.login-box{background:#fff;padding:40px;border-radius:10px;width:400px;box-shadow:0 2px 12px rgba(0,0,0,0.08);}
.login-box h2{text-align:center;margin-bottom:24px;}
#loginTip{margin:12px 0;}