/* ========== 全站公共样式 ========== */
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#222;background:#f5f7fa;line-height:1.55;font-size:14px}
a{color:#007bff;text-decoration:none;transition:color .15s}
a:hover{color:#0056b3}
img{max-width:100%}
button{cursor:pointer;font-family:inherit}

/* ===== 顶部导航 ===== */
.navbar{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.05);position:sticky;top:0;z-index:99}
.nav-inner{max-width:1180px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:60px}
.nav-logo{font-size:18px;font-weight:700;color:#222}
.nav-logo span{color:#007bff}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{padding:8px 14px;color:#555;border-radius:6px;font-size:14px}
.nav-menu a:hover,.nav-menu a.on{background:#f0f7ff;color:#007bff}
.nav-user{display:flex;align-items:center;gap:10px}
.nav-user .btn{padding:6px 14px;font-size:13px}
.nav-user .name{color:#555}

/* ===== 通用按钮 ===== */
.btn{display:inline-block;padding:10px 22px;border-radius:6px;border:none;font-size:14px;cursor:pointer;transition:all .15s;text-align:center;line-height:1.4}
.btn-primary{background:#007bff;color:#fff}
.btn-primary:hover{background:#0069d9;color:#fff}
.btn-success{background:#28a745;color:#fff}
.btn-success:hover{background:#218838;color:#fff}
.btn-danger{background:#dc3545;color:#fff}
.btn-danger:hover{background:#c82333;color:#fff}
.btn-default{background:#fff;color:#555;border:1px solid #ddd}
.btn-default:hover{border-color:#007bff;color:#007bff}
.btn-sm{padding:5px 12px;font-size:12px}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-block{display:block;width:100%}

/* ===== 表单 ===== */
.form-row{margin-bottom:16px}
.form-row label{display:block;margin-bottom:6px;color:#555;font-size:13px}
.form-control{display:block;width:100%;padding:11px 14px;font-size:14px;line-height:1.4;border:1px solid #ddd;border-radius:6px;background:#fff;transition:border-color .15s,box-shadow .15s}
.form-control:focus{border-color:#80bdff;outline:0;box-shadow:0 0 0 .2rem rgba(0,123,255,.15)}
select.form-control{cursor:pointer}
textarea.form-control{min-height:90px;resize:vertical}

/* ===== 卡片 ===== */
.card{background:#fff;border-radius:10px;box-shadow:0 1px 3px rgba(0,0,0,.05);padding:24px;margin-bottom:20px}
.card-title{font-size:16px;font-weight:600;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid #eee}

/* ===== 表格 ===== */
.table{width:100%;border-collapse:collapse;background:#fff}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid #eee;font-size:14px}
.table th{background:#fafbfc;color:#666;font-weight:600;font-size:13px}
.table tr:hover{background:#fafbfc}

/* ===== 提示 ===== */
.alert{padding:12px 16px;border-radius:6px;margin-bottom:16px;font-size:14px;border:1px solid transparent}
.alert-success{background:#d4edda;color:#155724;border-color:#c3e6cb}
.alert-danger{background:#f8d7da;color:#721c24;border-color:#f5c6cb}
.alert-info{background:#d1ecf1;color:#0c5460;border-color:#bee5eb}
.alert-warn{background:#fff3cd;color:#856404;border-color:#ffeeba}

/* ===== 徽章 ===== */
.badge{display:inline-block;padding:3px 9px;font-size:12px;border-radius:11px;font-weight:500}
.badge-success{background:#d4edda;color:#155724}
.badge-danger{background:#f8d7da;color:#721c24}
.badge-warn{background:#fff3cd;color:#856404}
.badge-info{background:#d1ecf1;color:#0c5460}
.badge-default{background:#e9ecef;color:#495057}

/* ===== 布局 ===== */
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.main{padding:30px 0;min-height:calc(100vh - 60px - 80px)}

/* ===== 首页 Hero ===== */
.hero{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:90px 20px;text-align:center}
.hero h1{font-size:42px;margin-bottom:18px;font-weight:700}
.hero p{font-size:18px;opacity:.92;max-width:760px;margin:0 auto 32px}
.hero .actions .btn{margin:0 6px}
@media(max-width:600px){
    .hero h1{font-size:30px}
    .hero p{font-size:15px}
}

.section{padding:60px 20px}
.section h2{text-align:center;font-size:30px;margin-bottom:14px}
.section .lead{text-align:center;color:#666;max-width:720px;margin:0 auto 40px;font-size:15px}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;max-width:1180px;margin:0 auto}
.feature-card{background:#fff;padding:28px;border-radius:10px;box-shadow:0 1px 3px rgba(0,0,0,.05);text-align:center;transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card .icon{font-size:38px;margin-bottom:12px}
.feature-card h3{font-size:17px;margin-bottom:8px}
.feature-card p{color:#666;font-size:14px;line-height:1.7}

.packages{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;max-width:1080px;margin:0 auto}
.pkg-card{background:#fff;border-radius:12px;padding:30px 24px;box-shadow:0 1px 3px rgba(0,0,0,.05);position:relative;text-align:center;transition:transform .2s,box-shadow .2s}
.pkg-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.pkg-card .tag{position:absolute;top:-10px;right:20px;background:#ff4757;color:#fff;padding:4px 12px;font-size:12px;border-radius:12px}
.pkg-card h3{font-size:20px;margin-bottom:8px}
.pkg-card .price{font-size:36px;font-weight:700;color:#007bff;margin:14px 0 4px}
.pkg-card .price small{font-size:14px;color:#999;font-weight:400}
.pkg-card .duration{color:#999;font-size:14px;margin-bottom:18px}
.pkg-card ul{text-align:left;margin:0 0 22px;list-style:none;color:#555;font-size:14px;line-height:2}
.pkg-card ul li::before{content:'✓ ';color:#28a745;font-weight:700}

/* ===== 用户中心/后台布局 ===== */
.user-wrap,.admin-wrap{display:flex;gap:20px;max-width:1180px;margin:0 auto;padding:20px}
.sidebar{width:200px;background:#fff;border-radius:10px;padding:14px 0;box-shadow:0 1px 3px rgba(0,0,0,.05);flex-shrink:0;height:fit-content}
.sidebar h4{font-size:12px;color:#999;padding:6px 18px;margin-top:6px;text-transform:uppercase}
.sidebar a{display:block;padding:10px 18px;color:#555;font-size:14px;border-left:3px solid transparent}
.sidebar a:hover{background:#f0f7ff;color:#007bff}
.sidebar a.on{background:#f0f7ff;color:#007bff;border-left-color:#007bff;font-weight:500}
.content{flex:1;min-width:0}

/* ===== 页脚 ===== */
.footer{background:#fff;border-top:1px solid #eee;padding:20px;text-align:center;color:#888;font-size:13px}
.footer a{color:#888;margin:0 6px}

/* ===== 工具类 ===== */
.text-muted{color:#999}
.text-center{text-align:center}
.text-right{text-align:right}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}
.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}
.mr-1{margin-right:8px}
.flex{display:flex;align-items:center;gap:10px}
.between{justify-content:space-between}
.gap-2{gap:16px}
.gap-3{gap:24px}

/* ===== 统计卡片 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:20px}
.stat-card{background:#fff;padding:20px;border-radius:10px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.stat-card .label{color:#888;font-size:13px;margin-bottom:6px}
.stat-card .value{font-size:26px;font-weight:700;color:#222}
.stat-card.primary .value{color:#007bff}
.stat-card.success .value{color:#28a745}
.stat-card.warn .value{color:#ffc107}
.stat-card.danger .value{color:#dc3545}

/* ===== 移动端 ===== */
@media(max-width:768px){
    .user-wrap,.admin-wrap{flex-direction:column;padding:12px}
    .sidebar{width:100%}
    .sidebar a{display:inline-block;border-left:0;border-bottom:3px solid transparent;padding:8px 14px}
    .sidebar a.on{border-left:0;border-bottom-color:#007bff}
    .table th,.table td{padding:8px;font-size:13px}
}