:root{
  --primary:#2563eb; --primary-dark:#1d4ed8; --success:#16a34a; --danger:#dc2626;
  --warning:#d97706; --bg:#f4f6fb; --card:#fff; --text:#1f2937; --muted:#6b7280;
  --border:#e5e7eb; --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.main-container{min-height:calc(100vh - 160px);padding-top:20px;padding-bottom:40px}
.muted{color:var(--muted)}.small{font-size:12px}

/* ---------- 顶部导航 ---------- */
.topbar{background:var(--card);box-shadow:0 1px 3px rgba(0,0,0,.08);position:sticky;top:0;z-index:50}
.topbar-inner{display:flex;align-items:center;gap:20px;height:60px}
.brand{font-size:20px;font-weight:700;color:var(--text)}
.brand:hover{color:var(--primary)}
.main-nav{display:flex;gap:6px;flex:1}
.main-nav a{color:var(--text);padding:6px 12px;border-radius:8px;font-weight:500}
.main-nav a:hover,.main-nav a.active{background:#eef2ff;color:var(--primary)}
.nav-right{display:flex;align-items:center;gap:10px}
.points-chip{background:#fef3c7;color:#92400e;border-radius:999px;padding:3px 10px;font-size:13px}
.user-chip{display:flex;align-items:center;gap:4px;color:var(--text);font-weight:600;cursor:pointer}
.nav-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer}

/* ---------- 下拉 ---------- */
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.12);min-width:150px;padding:6px;z-index:60}
.dropdown.open .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:8px 12px;color:var(--text);border-radius:6px;font-size:14px}
.dropdown-menu a:hover{background:#f3f4f6}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;padding:9px 18px;border-radius:8px;border:1px solid transparent;cursor:pointer;font-size:14px;font-weight:600;text-align:center;line-height:1.4;transition:.15s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:#eff6ff}
.btn-success{background:var(--success);color:#fff}
.btn-danger{background:#fff;color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:#fef2f2}
.btn-warning{background:#fff;color:var(--warning);border-color:#fde68a}
.btn-sm{padding:5px 12px;font-size:13px}
.btn-block{display:block;width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}

/* ---------- 提示 ---------- */
.alert{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-size:14px;position:relative}
.alert-success{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert-danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert-warning{background:#fffbeb;color:#92400e;border:1px solid #fde68a}
.alert-info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}
.alert .close{position:absolute;right:10px;top:8px;background:none;border:none;font-size:18px;cursor:pointer;color:inherit;opacity:.6}

/* ---------- 表单 ---------- */
label{display:block;margin-bottom:12px;font-weight:600;font-size:14px}
label span{display:block;margin-bottom:4px;color:var(--text)}
input,select,textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
textarea{min-height:110px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 16px}
fieldset{border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:18px}
legend{padding:0 8px;font-weight:700;color:var(--primary)}

/* ---------- 卡片 ---------- */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 4px rgba(0,0,0,.06);transition:.18s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(0,0,0,.12)}
.card-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff}
.card-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.card-body{padding:12px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.card-title{font-size:15px;font-weight:700;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:42px}
.card-meta{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.badge{display:inline-block;padding:2px 8px;border-radius:6px;font-size:12px;font-weight:600}
.badge-primary{background:#e0e7ff;color:#3730a3}
.badge-success{background:#d1fae5;color:#065f46}
.badge-danger{background:#fee2e2;color:#991b1b}
.badge-warning{background:#fef3c7;color:#92400e}
.badge-muted{background:#f3f4f6;color:#6b7280}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);box-shadow:0 1px 4px rgba(0,0,0,.06)}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
th{background:#f9fafb;color:#374151;font-weight:700}
tr:last-child td{border-bottom:none}
tr:hover td{background:#fafbfc}
td.break{white-space:normal;min-width:180px}

/* ---------- 分页 ---------- */
.pagination{display:flex;gap:6px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.pagination a,.pagination span{padding:7px 13px;border-radius:8px;background:#fff;border:1px solid var(--border);color:var(--text);font-size:14px}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination a:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(120deg,#2563eb,#7c3aed);color:#fff;border-radius:16px;padding:42px 36px;margin-bottom:24px}
.hero h1{font-size:28px;margin-bottom:8px}
.hero p{opacity:.9}

.section-title{font-size:18px;font-weight:700;margin:26px 0 14px;display:flex;justify-content:space-between;align-items:center}
.category-pills{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.category-pills a{padding:7px 16px;background:#fff;border-radius:999px;border:1px solid var(--border);color:var(--text);font-size:14px}
.category-pills a.active,.category-pills a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.search-bar{display:flex;gap:10px;margin-bottom:18px}
.search-bar input{flex:1}

/* ---------- 视频详情 ---------- */
.video-layout{display:grid;grid-template-columns:1fr 340px;gap:22px}
.player{background:#000;border-radius:12px;overflow:hidden;aspect-ratio:16/9}
.player video{width:100%;height:100%;display:block}
.video-info{background:#fff;border-radius:12px;padding:18px;margin-top:18px}
.video-info h1{font-size:20px;margin-bottom:10px}
.info-meta{display:flex;gap:14px;color:var(--muted);font-size:13px;flex-wrap:wrap;margin-bottom:12px}
.desc{color:#374151;white-space:pre-wrap;font-size:14px}
.side-card{background:#fff;border-radius:12px;padding:16px;margin-bottom:18px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.side-card h3{font-size:15px;margin-bottom:10px}
.comment-item{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--border)}
.comment-item:last-child{border-bottom:none}
.avatar{width:36px;height:36px;border-radius:50%;background:#e0e7ff;display:flex;align-items:center;justify-content:center;font-weight:700;color:#3730a3;overflow:hidden;flex-shrink:0}
.avatar img{width:100%;height:100%;object-fit:cover}
.comment-body{flex:1}
.comment-head{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.comment-content{margin-top:4px;font-size:14px}

/* ---------- 进度条 ---------- */
.progress{height:8px;background:#e5e7eb;border-radius:999px;overflow:hidden;flex:1}
.progress .bar{height:100%;background:var(--primary);border-radius:999px}
.progress-wrap{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}

/* ---------- 统计卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.stat-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.stat-card .num{font-size:28px;font-weight:800;color:var(--primary)}
.stat-card .lab{color:var(--muted);font-size:13px;margin-top:4px}

/* ---------- 底部导航（H5） ---------- */
.bottom-nav{position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--border);display:flex;z-index:100;padding-bottom:env(safe-area-inset-bottom)}
.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 0 9px;color:#6b7280;font-size:11px}
.bottom-nav a.active{color:var(--primary)}
.bottom-nav .bn-icon{font-size:21px;line-height:1}

/* ---------- 后台布局 ---------- */
.admin-wrap{display:flex;min-height:100vh}
.admin-sidebar{width:220px;background:#111827;color:#d1d5db;flex-shrink:0;display:flex;flex-direction:column}
.admin-brand{color:#fff;font-weight:700;font-size:18px;padding:20px 18px;border-bottom:1px solid #1f2937}
.admin-sidebar nav{flex:1;padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.admin-sidebar nav a,.admin-sidebar>a{color:#d1d5db;padding:10px 14px;border-radius:8px;font-size:14px}
.admin-sidebar nav a:hover,.admin-sidebar nav a.active{background:#1f2937;color:#fff}
.admin-sidebar>a{display:block;margin:6px 10px}
.admin-main{flex:1;min-width:0;background:var(--bg);padding:20px}
.admin-top{font-size:20px;font-weight:700;margin-bottom:16px}
.admin-content{max-width:1200px}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .video-layout{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .form-row,.form-row-3{grid-template-columns:1fr}
}
@media (max-width:640px){
  .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;flex-direction:column;padding:10px;box-shadow:0 10px 20px rgba(0,0,0,.1)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .points-chip{display:none}
  body.has-bottom{padding-bottom:60px}
  .admin-sidebar{position:fixed;left:-220px;top:0;bottom:0;transition:.2s;z-index:90}
  .admin-sidebar.open{left:0}
  .admin-main{padding:12px}
}
/* 平板以下显示底部导航时给主体留出空间 */
@media (max-width:768px){
  .footer{padding-bottom:66px}
}
.footer{background:#fff;border-top:1px solid var(--border);margin-top:30px}
.footer .container{padding:18px 16px;color:var(--muted);font-size:13px;text-align:center}

.empty{padding:50px;text-align:center;color:var(--muted)}
.text-center{text-align:center}
.mt{margin-top:14px}.mb{margin-bottom:14px}
.auth-box{max-width:420px;margin:30px auto;background:#fff;border-radius:14px;padding:28px;box-shadow:0 6px 24px rgba(0,0,0,.08)}
.auth-box h2{text-align:center;margin-bottom:20px}
.install-body{background:linear-gradient(135deg,#2563eb,#7c3aed);display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.install-box{background:#fff;border-radius:14px;padding:28px;max-width:520px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.install-box h1{font-size:22px;margin-bottom:18px}
.pay-tip{background:#fef3c7;border:1px solid #fde68a;border-radius:8px;padding:10px 14px;font-size:13px;color:#92400e;margin:8px 0}
/* ================= 移动端顶部抽屉菜单（H5） ================= */
.mobile-menu{display:none}
.mm-user{display:flex;align-items:center;gap:10px;padding:14px 16px;background:#f8fafc;border-bottom:1px solid var(--border)}
.mm-user-info{flex:1;min-width:0;display:flex;flex-direction:column}
.mm-user-info strong{font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mm-wallet{display:flex;flex-direction:column;align-items:flex-end;gap:2px;font-size:12px;color:#92400e;white-space:nowrap}
.mm-links{display:flex;flex-direction:column;padding:8px}
.mm-links a{padding:12px 14px;border-radius:8px;color:var(--text);font-size:15px}
.mm-links a:active{background:#f3f4f6}
.mm-actions{padding:12px 16px calc(18px + env(safe-area-inset-bottom));display:flex;gap:10px}
.mm-actions .btn{flex:1}

@media (max-width:640px){
  .topbar-inner{gap:10px;height:56px}
  .brand{display:flex;align-items:center;gap:6px;min-width:0;font-size:17px}
  .brand-name{display:inline-block;max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .main-nav,.main-nav.open{display:none}
  .nav-right{display:none}
  .nav-toggle{display:flex;align-items:center;justify-content:center;margin-left:auto;width:40px;height:40px;border-radius:10px;background:#f3f4f6;color:var(--text);font-size:20px;line-height:1;flex-shrink:0;border:none;cursor:pointer}
  .mobile-menu.open{display:block;position:absolute;top:100%;left:0;right:0;background:#fff;box-shadow:0 14px 28px rgba(0,0,0,.14);max-height:calc(100vh - 56px);overflow-y:auto;z-index:80}
  .points-chip{display:none}
  .grid{grid-template-columns:repeat(2,1fr);gap:12px}
  body.has-bottom{padding-bottom:60px}
}

/* ================= 工作台标签页 ================= */
.tabs{display:flex;gap:6px;background:#fff;padding:6px;border-radius:12px;margin-bottom:18px;overflow-x:auto;-webkit-overflow-scrolling:touch;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.tabs .tab{padding:9px 18px;border-radius:8px;color:var(--text);white-space:nowrap;font-size:14px;font-weight:600}
.tabs .tab.active{background:var(--primary);color:#fff}
.tabs .tab:hover{background:#eef2ff;color:var(--primary)}
.tabs .tab.active:hover{background:var(--primary-dark);color:#fff}

/* ================= 分片上传（拖拽区 + 进度） ================= */
.drop-zone{border:2px dashed var(--border);border-radius:12px;padding:26px 16px;text-align:center;cursor:pointer;background:#fafbfc;transition:.15s;color:var(--muted)}
.drop-zone:hover{border-color:var(--primary);background:#f8faff}
.drop-zone.over{border-color:var(--primary);background:#eff6ff}
.drop-zone strong{display:block;color:var(--text);margin-bottom:4px;font-size:15px}
.upload-progress{height:10px;background:#e5e7eb;border-radius:999px;overflow:hidden;margin-top:12px}
.upload-progress .bar{height:100%;width:0;background:var(--primary);border-radius:999px;transition:width .2s}

/* ================= 评论删除按钮 ================= */
.link-del{background:none;border:none;color:var(--danger);cursor:pointer;font-size:13px;padding:0 4px;text-decoration:underline}
.link-del:hover{color:#991b1b}

/* ================= 弹窗 ================= */
.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:300;padding:20px}
.modal-box{background:#fff;border-radius:14px;padding:22px;max-width:460px;width:100%;max-height:90vh;overflow-y:auto}
.modal-box h3{margin-bottom:12px;font-size:17px}

/* ================= 商品详情页 ================= */
.goods-detail{display:grid;grid-template-columns:400px 1fr;gap:24px;background:#fff;border-radius:14px;padding:22px;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.goods-detail-cover{aspect-ratio:1/1;background:linear-gradient(135deg,#eef2ff,#e0e7ff);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:84px;overflow:hidden}
.goods-detail-cover img{width:100%;height:100%;object-fit:cover}
.goods-detail-info h1{font-size:22px;line-height:1.4;margin-bottom:6px}
.goods-points{font-size:26px;font-weight:800;color:#d97706;margin:6px 0 10px}
.goods-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-bottom:14px}
.buy-box{background:#f8fafc;border:1px solid var(--border);border-radius:12px;padding:16px}
@media (max-width:768px){
  .goods-detail{grid-template-columns:1fr;padding:16px;gap:16px}
  .goods-detail-cover{max-width:260px;margin:0 auto;font-size:64px}
  .goods-detail-info h1{font-size:19px}
  .goods-points{font-size:22px}
}

/* 可点击的统计卡 */
a.stat-card{display:block;color:var(--text);text-decoration:none;transition:.15s}
a.stat-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.1)}
a.stat-card:hover .lab{color:var(--primary)}