/* ===== 全局重置 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#667eea;--primary-dark:#5568d3;--primary-light:#764ba2;
    --accent:#f5576c;--success:#43e97b;--warning:#fa8231;
    --dark:#1a1a2e;--text:#333;--text-light:#666;--text-lighter:#999;
    --bg:#f5f6fa;--card:#fff;--border:#e8e8e8;
    --shadow:0 2px 12px rgba(0,0,0,.06);--shadow-lg:0 8px 30px rgba(0,0,0,.12);
    --radius:12px;--radius-sm:8px;--radius-lg:20px;
    --header-h:64px;
}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC',-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{cursor:pointer;text-decoration:none;color:inherit}
button{cursor:pointer;border:none;outline:none;font-family:inherit}
input,textarea{outline:none;font-family:inherit}
img{max-width:100%;display:block}

/* ===== 头部 ===== */
.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(255,255,255,.85);backdrop-filter:blur(20px);z-index:1000;box-shadow:0 1px 8px rgba(0,0,0,.04);transition:all .3s}
.header-inner{max-width:1280px;margin:0 auto;height:100%;display:flex;align-items:center;gap:24px;padding:0 20px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:var(--primary);cursor:pointer;white-space:nowrap}
.logo-icon{width:32px;height:32px}
.nav-menu{display:flex;gap:4px}
.nav-item{padding:8px 16px;border-radius:var(--radius-sm);color:var(--text);font-size:14px;font-weight:500;transition:all .2s;white-space:nowrap}
.nav-item:hover{background:rgba(102,126,234,.08);color:var(--primary)}
.nav-item.active{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;background:var(--bg);border:1.5px solid var(--border);border-radius:20px;padding:4px 4px 4px 16px;transition:all .3s;width:200px}
.search-box:focus-within{border-color:var(--primary);width:240px}
.search-box input{border:none;background:transparent;flex:1;font-size:13px;width:100%}
.search-btn{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.search-btn:hover{transform:scale(1.05)}
.user-area{display:flex;gap:8px}
.btn-login{padding:8px 20px;border-radius:20px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:14px;font-weight:500;transition:all .2s}
.btn-login:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(102,126,234,.3)}
.btn-register{padding:8px 20px;border-radius:20px;background:transparent;border:1.5px solid var(--primary);color:var(--primary);font-size:14px;font-weight:500;transition:all .2s}
.btn-register:hover{background:rgba(102,126,234,.05)}
.user-info{display:flex;align-items:center;gap:12px}
.balance-badge{display:flex;align-items:center;gap:4px;padding:6px 14px;border-radius:20px;background:linear-gradient(135deg,#fff5e6,#ffe0b3);color:#fa8231;font-weight:600;font-size:13px;cursor:pointer;transition:all .2s}
.balance-badge:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(250,130,49,.2)}
.user-dropdown{position:relative}
.user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;transition:transform .2s}
.user-avatar:hover{transform:scale(1.05)}
.dropdown-menu{position:absolute;right:0;top:48px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:8px;min-width:180px;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .2s}
.dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{display:block;padding:10px 16px;border-radius:var(--radius-sm);font-size:14px;transition:background .2s}
.dropdown-menu a:hover{background:var(--bg)}
.dropdown-header{padding:12px 16px;border-bottom:1px solid var(--border);margin-bottom:4px}
.dropdown-username{font-weight:600;font-size:14px}
.dropdown-divider{height:1px;background:var(--border);margin:4px 0}
.admin-link{color:var(--accent)!important;font-weight:600!important}
.logout-link{color:#e74c3c!important}
.mobile-menu-btn{display:none;background:transparent;color:var(--text)}

/* ===== 主内容 ===== */
.main-content{margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}
.page{display:none;animation:fadeIn .4s ease}
.page.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.page-container{max-width:1080px;margin:0 auto;padding:24px 20px}
.page-title{font-size:24px;font-weight:700;margin-bottom:20px;color:var(--dark)}

/* ===== 轮播图 ===== */
.banner-section{max-width:1280px;margin:20px auto;padding:0 20px;position:relative}
.banner-carousel{position:relative;height:300px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}
.banner-slide{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .6s ease}
.banner-slide.active{opacity:1}
.banner-bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.banner-content{position:relative;z-index:2;text-align:center;color:#fff;animation:bannerFade .6s ease}
@keyframes bannerFade{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.banner-content h2{font-size:36px;font-weight:900;margin-bottom:8px;text-shadow:0 2px 8px rgba(0,0,0,.15)}
.banner-content p{font-size:16px;opacity:.9;margin-bottom:12px}
.banner-tag{display:inline-block;padding:6px 20px;background:rgba(255,255,255,.2);border-radius:20px;font-size:13px;backdrop-filter:blur(4px)}
.banner-prev,.banner-next{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.3);color:#fff;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;z-index:2;transition:background .2s;backdrop-filter:blur(4px)}
.banner-prev:hover,.banner-next:hover{background:rgba(0,0,0,.5)}
.banner-prev{left:12px}.banner-next{right:12px}
.banner-dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.banner-dots span{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:all .2s}
.banner-dots span.active{background:#fff;width:24px;border-radius:4px}

/* ===== 公告栏 ===== */
.announcement-bar{max-width:1280px;margin:16px auto;padding:0 20px;display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,#fff8e1,#fff3cd);border-radius:var(--radius);padding:12px 20px}
.announcement-icon{color:var(--warning);flex-shrink:0}
.announcement-content{flex:1;font-size:14px;color:#765200;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}

/* ===== 分类导航 ===== */
.category-nav{max-width:1280px;margin:24px auto;padding:0 20px;display:flex;gap:8px;flex-wrap:wrap}
.category-item{padding:8px 20px;border-radius:20px;background:#fff;border:1.5px solid var(--border);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}
.category-item:hover{border-color:var(--primary);color:var(--primary)}
.category-item.active{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-color:transparent}

/* ===== 商品区域 ===== */
.products-section{max-width:1280px;margin:24px auto;padding:0 20px}
.section-header{text-align:center;margin-bottom:24px}
.section-title{font-size:28px;font-weight:900;color:var(--dark);background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-subtitle{font-size:14px;color:var(--text-lighter);margin-top:4px}
.sort-tabs{display:flex;gap:8px;justify-content:center;margin-top:16px}
.sort-tab{padding:6px 16px;border-radius:16px;background:#fff;border:1px solid var(--border);font-size:13px;transition:all .2s}
.sort-tab:hover{border-color:var(--primary)}
.sort-tab.active{background:var(--primary);color:#fff;border-color:transparent}
.products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.product-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s;cursor:pointer}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product-img{width:100%;aspect-ratio:1;background:linear-gradient(135deg,#f0f0f5,#e8e8f0);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.product-img-placeholder{font-size:48px;font-weight:900;color:var(--primary);opacity:.15}
.product-badge{position:absolute;top:8px;left:8px;padding:2px 10px;border-radius:12px;font-size:11px;font-weight:600;color:#fff}
.product-badge.hot{background:linear-gradient(135deg,#f5576c,#fa5252)}
.product-badge.new{background:linear-gradient(135deg,#43e97b,#38f9d7);color:#fff}
.product-info{padding:12px}
.product-title{font-size:14px;font-weight:600;line-height:1.4;height:40px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.product-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px}
.product-price{color:var(--accent);font-size:18px;font-weight:700}
.product-price small{font-size:12px;font-weight:400}
.product-sales{font-size:12px;color:var(--text-lighter)}
.product-footer{display:flex;justify-content:space-between;align-items:center;margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}
.product-stock{font-size:12px;color:var(--text-lighter)}
.btn-buy{padding:6px 16px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:12px;font-weight:500;transition:all .2s}
.btn-buy:hover{transform:scale(1.05)}

/* ===== QQ群 ===== */
.qq-section{max-width:1280px;margin:32px auto;padding:32px 20px;text-align:center;background:linear-gradient(135deg,#667eea11,#764ba211);border-radius:var(--radius-lg)}
.qq-section h3{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--dark)}
.qq-groups{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.qq-group-card{display:flex;align-items:center;gap:8px;padding:12px 20px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.qq-group-card svg{color:var(--primary)}
.qq-group-card .qq-no{font-weight:700;color:var(--dark)}

/* ===== 拼团 ===== */
.group-buy-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.group-buy-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s}
.group-buy-card:hover{transform:translateY(-4px)}
.group-buy-info{padding:16px}
.group-buy-price{display:flex;align-items:baseline;gap:8px;margin:8px 0}
.group-buy-price .group-price{font-size:22px;font-weight:700;color:var(--accent)}
.group-buy-price .original-price{font-size:14px;color:var(--text-lighter);text-decoration:line-through}
.group-buy-progress{background:var(--bg);border-radius:12px;height:24px;overflow:hidden;position:relative;margin:8px 0}
.group-buy-progress-bar{height:100%;background:linear-gradient(90deg,var(--success),#38f9d7);border-radius:12px;transition:width .5s}
.group-buy-progress-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600}
.group-buy-countdown{font-size:13px;color:var(--warning);text-align:center;margin:8px 0}
.btn-group-buy{width:100%;padding:12px;background:linear-gradient(135deg,var(--accent),#fa5252);color:#fff;font-weight:600;border-radius:0 0 var(--radius) var(--radius)}

/* ===== 红包 ===== */
.red-packet-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.red-packet-card{background:linear-gradient(135deg,#f5576c,#fa5252);border-radius:var(--radius);padding:24px;color:#fff;text-align:center;position:relative;overflow:hidden;transition:transform .3s}
.red-packet-card:hover{transform:translateY(-4px)}
.red-packet-card::before{content:'';position:absolute;top:-20px;left:-20px;width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.1)}
.red-packet-card::after{content:'';position:absolute;bottom:-20px;right:-20px;width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.1)}
.red-packet-amount{font-size:36px;font-weight:900}
.red-packet-amount span{font-size:16px}
.red-packet-title{font-size:14px;margin:4px 0;opacity:.9}
.red-packet-min{font-size:12px;opacity:.7;margin:4px 0}
.btn-claim-rp{padding:8px 24px;background:#fff;color:var(--accent);border-radius:20px;font-weight:600;margin-top:8px;position:relative;z-index:1}
.btn-claim-rp:disabled{opacity:.5;cursor:not-allowed}

/* ===== 卡密兑换 ===== */
.redeem-box{background:#fff;border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow);text-align:center}
.redeem-tip{color:var(--text-light);font-size:14px;margin-bottom:20px}
.redeem-form{display:flex;gap:12px;max-width:500px;margin:0 auto}
.redeem-input{flex:1;padding:12px 20px;border:2px solid var(--border);border-radius:var(--radius);font-size:16px;transition:border-color .2s}
.redeem-input:focus{border-color:var(--primary)}

/* ===== 进度查询 ===== */
.progress-search{display:flex;gap:12px;margin-bottom:20px}
.progress-search input{flex:1;padding:12px 20px;border:2px solid var(--border);border-radius:var(--radius);font-size:14px}
.progress-search input:focus{border-color:var(--primary)}
.progress-list{display:flex;flex-direction:column;gap:12px}
.progress-item{background:#fff;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);display:flex;align-items:center;gap:16px}
.progress-status{width:12px;height:12px;border-radius:50%;flex-shrink:0}
.progress-status.pending{background:var(--warning)}
.progress-status.processing{background:var(--primary);animation:pulse 1.5s infinite}
.progress-status.completed{background:var(--success)}
.progress-status.cancelled{background:#ccc}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.progress-info{flex:1}
.progress-order-no{font-size:13px;color:var(--text-light)}
.progress-product{font-weight:600;margin:4px 0}

/* ===== 订单 ===== */
.order-tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.order-tab{padding:8px 20px;border-radius:20px;background:#fff;border:1px solid var(--border);font-size:14px;transition:all .2s}
.order-tab.active{background:var(--primary);color:#fff;border-color:transparent}
.orders-list{display:flex;flex-direction:column;gap:16px}
.order-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.order-card-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--bg);font-size:13px}
.order-status{padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600}
.order-status.paid{background:#e3f2fd;color:var(--primary)}
.order-status.processing{background:#fff3e0;color:var(--warning)}
.order-status.completed{background:#e8f5e9;color:var(--success)}
.order-status.cancelled{background:#f5f5f5;color:#999}
.order-card-body{padding:16px 20px}
.order-product{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.order-product-title{font-weight:600}
.order-product-price{color:var(--accent);font-weight:700}
.order-info{font-size:13px;color:var(--text-light);margin-top:4px}
.order-card-footer{padding:12px 20px;border-top:1px solid var(--border);text-align:right}
.order-empty{text-align:center;padding:60px 20px;color:var(--text-lighter)}

/* ===== 充值 ===== */
.balance-card{background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:var(--radius-lg);padding:32px;color:#fff;margin-bottom:24px}
.balance-label{font-size:14px;opacity:.8}
.balance-amount{font-size:40px;font-weight:900;margin-top:4px}
.balance-amount span{font-size:16px;font-weight:400}
.recharge-packages{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.recharge-package{background:#fff;border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:all .2s;border:2px solid transparent;position:relative;overflow:hidden}
.recharge-package:hover{transform:translateY(-4px);border-color:var(--primary)}
.recharge-package.selected{border-color:var(--primary);background:linear-gradient(135deg,rgba(102,126,234,.05),rgba(118,75,162,.05))}
.recharge-amount{font-size:28px;font-weight:700;color:var(--dark)}
.recharge-amount span{font-size:14px}
.recharge-bonus{font-size:14px;color:var(--accent);margin-top:4px;font-weight:600}
.recharge-bonus-label{font-size:12px;color:var(--text-lighter);margin-top:4px}
.recharge-tips{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.recharge-tips h3{font-size:16px;margin-bottom:12px;color:var(--dark)}
.recharge-tips ul{list-style:none;padding:0}
.recharge-tips li{padding:6px 0;font-size:14px;color:var(--text-light);padding-left:20px;position:relative}
.recharge-tips li::before{content:'';position:absolute;left:0;top:14px;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.recharge-history{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-top:20px}
.recharge-history h3{font-size:16px;margin-bottom:12px;color:var(--dark)}
.recharge-record-item{background:#f9f9ff;border-radius:8px;padding:14px 16px;margin-bottom:10px;border-left:3px solid var(--primary)}

/* ===== 提现 ===== */
.withdraw-form{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.withdraw-tips{background:#fff;border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.withdraw-tips h3{font-size:16px;margin-bottom:12px;color:var(--dark)}
.withdraw-tips ul{list-style:none;padding:0}
.withdraw-tips li{padding:6px 0;font-size:14px;color:var(--text-light);padding-left:20px;position:relative}
.withdraw-tips li::before{content:'';position:absolute;left:0;top:14px;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.withdraw-record-item{background:#fff;border-radius:var(--radius);padding:14px 16px;box-shadow:var(--shadow);margin-bottom:10px}
.upload-area{border:2px dashed #ddd;border-radius:8px;padding:20px;text-align:center;cursor:pointer;transition:all .3s}
.upload-area:hover{border-color:var(--primary);background:#f9f9ff}

/* ===== 消息 ===== */
.messages-list{display:flex;flex-direction:column;gap:12px}
.message-item{background:#fff;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);display:flex;gap:16px}
.message-icon{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}
.message-content{flex:1}
.message-title{font-weight:600;font-size:14px}
.message-text{font-size:13px;color:var(--text-light);margin-top:4px}
.message-time{font-size:12px;color:var(--text-lighter)}
.message-unread{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}

/* ===== 后台管理 ===== */
.admin-layout{display:flex;min-height:calc(100vh - var(--header-h))}
.admin-sidebar{width:220px;background:#fff;border-right:1px solid var(--border);padding:20px 0;position:fixed;top:var(--header-h);bottom:0;left:0;overflow-y:auto}
.admin-sidebar-header{padding:16px 24px;font-size:18px;font-weight:700;color:var(--primary)}
.admin-nav{display:flex;flex-direction:column}
.admin-nav a{padding:12px 24px;font-size:14px;transition:all .2s;cursor:pointer;border-left:3px solid transparent}
.admin-nav a:hover{background:var(--bg)}
.admin-nav a.active{background:linear-gradient(90deg,rgba(102,126,234,.08),transparent);color:var(--primary);border-left-color:var(--primary);font-weight:600}
.nav-badge{display:inline-block;min-width:18px;height:18px;line-height:18px;padding:0 5px;background:#ef4444;color:#fff;font-size:11px;font-weight:600;border-radius:9px;text-align:center;margin-left:6px;vertical-align:middle}
.admin-content{flex:1;margin-left:220px;padding:24px;max-width:calc(100% - 220px)}
.admin-stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.stat-card .stat-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:12px}
.stat-card .stat-value{font-size:28px;font-weight:700;color:var(--dark)}
.stat-card .stat-label{font-size:14px;color:var(--text-light)}
.admin-table{width:100%;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.admin-table table{width:100%;border-collapse:collapse}
.admin-table th{background:var(--bg);padding:12px;text-align:left;font-size:13px;font-weight:600;color:var(--text-light)}
.admin-table td{padding:12px;font-size:13px;border-top:1px solid var(--border)}
.admin-table tr:hover{background:var(--bg)}
.admin-toolbar{display:flex;gap:12px;margin-bottom:16px;align-items:center;flex-wrap:wrap}
.admin-toolbar input,.admin-toolbar select{padding:8px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px}
.btn-admin{padding:8px 20px;border-radius:var(--radius-sm);background:var(--primary);color:#fff;font-size:14px;font-weight:500}
.btn-admin.danger{background:var(--accent)}
.btn-admin.success{background:var(--success);color:#fff}
.admin-form-group{margin-bottom:16px}
.admin-form-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:500}
.admin-form-group input,.admin-form-group select,.admin-form-group textarea{width:100%;padding:10px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px}
.admin-form-group input:focus,.admin-form-group select:focus,.admin-form-group textarea:focus{border-color:var(--primary)}

/* ===== 弹窗 ===== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);z-index:2000;display:flex;align-items:center;justify-content:center;animation:fadeIn .3s}
.modal-box{background:#fff;border-radius:var(--radius-lg);padding:32px;width:90%;max-width:440px;position:relative;animation:modalSlide .3s ease;max-height:90vh;overflow-y:auto}
@keyframes modalSlide{from{opacity:0;transform:translateY(30px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal-close{position:absolute;top:12px;right:16px;font-size:28px;background:none;color:var(--text-lighter);line-height:1}
.modal-close:hover{color:var(--accent)}
.modal-box h2{text-align:center;margin-bottom:24px;font-size:22px;color:var(--dark)}
.form-group{margin-bottom:16px}
.form-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:500;color:var(--text)}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius);font-size:14px;transition:border-color .2s;resize:vertical}
.form-group input:focus,.form-group textarea:focus{border-color:var(--primary)}
.btn-primary{padding:12px 24px;border-radius:var(--radius);background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:14px;font-weight:600;transition:all .2s}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(102,126,234,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-full{width:100%;margin-top:8px}
.btn-qq{width:100%;padding:12px;border-radius:var(--radius);background:#12b7f5;color:#fff;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}
.btn-qq:hover{background:#0aa3e0}
.modal-divider{text-align:center;margin:20px 0;color:var(--text-lighter);font-size:13px;position:relative}
.modal-divider::before,.modal-divider::after{content:'';position:absolute;top:50%;width:35%;height:1px;background:var(--border)}
.modal-divider::before{left:0}
.modal-divider::after{right:0}
.modal-footer{text-align:center;margin-top:16px;font-size:14px;color:var(--text-light)}
.modal-footer a{color:var(--primary);font-weight:600}
.modal-footer a:hover{text-decoration:underline}
.order-summary{display:flex;justify-content:space-between;align-items:center;padding:16px 0;margin:8px 0 16px;border-top:2px solid var(--border);border-bottom:2px solid var(--border)}
.order-total{font-size:24px;font-weight:700;color:var(--accent)}
.quantity-control{display:flex;align-items:center;gap:0}
.quantity-control button{width:36px;height:36px;border:1.5px solid var(--border);background:#fff;font-size:18px;border-radius:0}
.quantity-control button:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}
.quantity-control button:last-child{border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.quantity-control input{width:60px;height:36px;border:1.5px solid var(--border);border-left:none;border-right:none;text-align:center;font-size:14px}
.recharge-pay-tips{text-align:center;margin:16px 0;color:var(--text-light);font-size:14px}

/* ===== Toast ===== */
.toast{position:fixed;top:80px;left:50%;transform:translateX(-50%) translateY(-100px);background:#333;color:#fff;padding:12px 24px;border-radius:var(--radius);font-size:14px;z-index:3000;opacity:0;transition:all .3s;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
.toast.success{background:var(--success);color:#fff}
.toast.error{background:var(--accent)}

/* ===== 回到顶部 ===== */
.back-to-top{position:fixed;bottom:40px;right:40px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;z-index:999}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-4px)}

/* ===== 底部 ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:40px 0 0}
.footer-inner{max-width:1280px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:12px;font-weight:600}
.footer-col p{font-size:13px;line-height:1.8}
.footer-bottom{text-align:center;padding:16px 20px;border-top:1px solid rgba(255,255,255,.1);margin-top:24px;font-size:12px}

/* ===== Loading ===== */
.loading-spinner{text-align:center;padding:60px 20px;color:var(--text-lighter)}
.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 响应式 ===== */
/* ===== 支付页面 ===== */
.pay-page .pay-box{max-width:500px;margin:0 auto;background:#fff;border-radius:16px;box-shadow:0 8px 30px rgba(0,0,0,0.08);padding:40px;text-align:center}
.pay-amount{margin-bottom:24px}
.pay-amount span{font-size:14px;color:#999;display:block;margin-bottom:8px}
.pay-amount-num{font-size:48px;font-weight:700;color:var(--primary)}
.pay-amount-num span{display:inline;font-size:20px;color:var(--primary);font-weight:500;margin-left:4px}
.pay-method-tabs{display:flex;gap:12px;margin-bottom:24px}
.pay-method-tab{flex:1;padding:14px;border:2px solid var(--border);border-radius:12px;background:#fff;font-size:15px;font-weight:500;color:#666;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:8px}
.pay-method-tab:hover{border-color:var(--primary);color:var(--primary)}
.pay-method-tab.active{border-color:var(--primary);background:linear-gradient(135deg,rgba(102,126,234,0.1),rgba(118,75,162,0.1));color:var(--primary)}
.pay-qr-container{width:100%;max-width:240px;aspect-ratio:1/1;margin:0 auto 16px;border:1px solid #eee;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#fafafa;overflow:hidden}
.pay-qr-img{width:100%;height:100%;object-fit:contain;display:block}
.pay-qr-placeholder{color:#bbb;text-align:center;padding:20px}
.pay-qr-placeholder svg{opacity:.4}
.pay-qr-placeholder p{font-size:14px;margin-top:12px}
.pay-qr-loading{color:#999;font-size:13px;text-align:center}
.pay-tip{font-size:14px;color:#666;margin-bottom:24px}
.pay-actions{display:flex;gap:12px}
.pay-actions .btn-secondary,.pay-actions .btn-primary{flex:1}

/* ===== 支付成功页 ===== */
.pay-success-page{text-align:center;padding:60px 20px}
.success-icon{width:100px;height:100px;margin:0 auto 24px;color:#10b981;background:linear-gradient(135deg,rgba(16,185,129,0.1),rgba(16,185,129,0.2));border-radius:50%;display:flex;align-items:center;justify-content:center;animation:successPulse .6s ease-out}
@keyframes successPulse{0%{transform:scale(0);opacity:0}50%{transform:scale(1.2)}100%{transform:scale(1);opacity:1}}
.success-title{font-size:28px;font-weight:700;color:#333;margin-bottom:12px}
.success-content{font-size:15px;color:#666;line-height:1.8;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}
.success-actions{display:flex;gap:12px;justify-content:center;max-width:400px;margin:0 auto}
.success-actions .btn-secondary,.success-actions .btn-primary{flex:1}

/* ===== 后台表单 ===== */
.admin-form{max-width:700px}
.admin-form hr{border:none;border-top:1px solid #eee;margin:24px 0}
.admin-form h4{font-size:16px;margin-bottom:16px;color:#333}

.btn-secondary{padding:10px 24px;border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;color:#666;font-size:14px;cursor:pointer;transition:all .2s}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}

@media (max-width:768px){
    .nav-menu{display:none}
    .nav-menu.show{display:flex;flex-direction:column;position:absolute;top:var(--header-h);left:0;right:0;background:#fff;padding:16px;gap:4px;box-shadow:var(--shadow-lg)}
    .mobile-menu-btn{display:block}
    .search-box{width:140px}
    .search-box:focus-within{width:160px}
    .banner-carousel{height:200px}
    .banner-content h2{font-size:24px}
    .products-grid{grid-template-columns:repeat(2,1fr)}
    .admin-sidebar{display:none}
    .admin-content{margin-left:0;max-width:100%}
    .balance-amount{font-size:28px}
    .recharge-packages{grid-template-columns:repeat(2,1fr)}
    .back-to-top{right:20px;bottom:20px}
    .modal-box{padding:24px}
}
@media (max-width:480px){
    .products-grid{grid-template-columns:repeat(2,1fr);gap:8px}
    .recharge-packages{grid-template-columns:repeat(2,1fr)}
    .header-right{gap:8px}
    .btn-login,.btn-register{padding:6px 14px;font-size:13px}
    .balance-badge{display:none}
    .product-card{border-radius:8px}
    .product-img{height:100px}
    .product-info{padding:6px 8px}
    .product-title{font-size:12px;-webkit-line-clamp:1}
    .product-price{font-size:14px}
    .product-sales{font-size:10px}
    .product-stock{font-size:10px}
    .btn-buy{padding:3px 8px;font-size:11px}
    .page-container{padding:10px}
    .nav-menu{gap:0}
    .nav-item{padding:6px 8px;font-size:12px}
}
/* APP端样式适配 */
body.is-app{padding-top:48px}
body.is-app .header{top:48px}
body.is-app .nav-menu{display:none}
body.is-app .search-box{display:none}
body.is-app .header-inner{height:48px;padding:0 12px}
body.is-app .logo{font-size:16px}
body.is-app .logo-icon{width:24px;height:24px}
body.is-app .modal-overlay{top:48px}
body.is-app .product-img{height:90px}
body.is-app .product-info{padding:5px 6px}
body.is-app .product-title{font-size:11px}
body.is-app .product-price{font-size:13px}
body.is-app .btn-buy{padding:3px 6px;font-size:10px}
body.is-app .product-meta{flex-wrap:wrap;gap:2px}
body.is-app .product-sales{font-size:9px}
body.is-app .product-stock{font-size:9px}
body.is-app .page-container{padding:8px}
body.is-app .recharge-package{padding:10px 6px}
body.is-app .recharge-amount{font-size:18px}
body.is-app .balance-card{padding:14px}
body.is-app .balance-amount{font-size:24px}
body.is-app .modal-box{padding:16px;margin:16px}
body.is-app .form-group input,.is-app .form-group textarea{font-size:14px}

@keyframes payBounce{0%{transform:scale(0)}60%{transform:scale(1.1)}100%{transform:scale(1)}}
@keyframes paySpin{to{transform:rotate(360deg)}}