:root{
  /* 蓝白色格调 */
  --bg:#eef3fa; --panel:#ffffff; --panel2:#f3f7fd; --line:#dfe7f2;
  --text:#1c2733; --muted:#6b7c93; --brand:#2563eb; --brand2:#3b82f6;
  --brand3:#2563eb; --danger:#ef4444; --success:#16a34a; --info:#2563eb;
  /* 主渐变：蓝 → 深蓝 */
  --grad:linear-gradient(135deg,#3b82f6 0%,#2563eb 100%);
  /* 高亮渐变：深蓝 → 天蓝（用于"开始生图"） */
  --grad-brand:linear-gradient(135deg,#2563eb 0%,#0ea5e9 100%);
  --shadow:0 10px 30px rgba(37,99,235,.10);
  --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.65;
  background:linear-gradient(180deg,#f4f8fe 0%,#eef3fa 100%);
  background-attachment:fixed;
}
::selection{background:rgba(37,99,235,.18);color:var(--brand)}
a{color:var(--brand3);text-decoration:none}
.text-gradient{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.container{max-width:1080px;margin:0 auto;padding:0 16px}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:sticky;top:0;z-index:10;
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(37,99,235,.05);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:800;font-size:18px;letter-spacing:.3px;color:var(--brand)}
.menu{display:flex;align-items:center;gap:10px;font-size:14px;flex-wrap:wrap}
.menu a{color:var(--muted);padding:7px 12px;border-radius:9px;transition:.18s}
.menu a.active,.menu a:hover{color:var(--brand);background:rgba(37,99,235,.08)}
.menu .user{color:var(--text);font-weight:600}
.menu .btn{color:#fff}
/* 头部高亮的"开始生图":蓝系渐变 */
.menu > a.btn{
  background:var(--grad-brand);
  box-shadow:0 6px 18px rgba(37,99,235,.32);
  font-weight:700;padding:8px 16px;
}
.menu > a.btn:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(37,99,235,.45);opacity:1}

.main{min-height:calc(100vh - 132px);padding:30px 16px}
.footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:20px 16px;text-align:center}

/* ---------- 按钮（主渐变:蓝→深蓝） ---------- */
.btn{
  display:inline-block;background:var(--grad);color:#fff;border:0;border-radius:11px;
  padding:11px 20px;font-size:14px;cursor:pointer;font-weight:700;letter-spacing:.3px;
  box-shadow:0 6px 18px rgba(37,99,235,.22);transition:transform .18s,box-shadow .18s,opacity .18s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.34);opacity:1}
.btn:active{transform:translateY(0)}
.btn-block{display:block;width:100%}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:9px}

/* ---------- 提示 ---------- */
.alert{padding:11px 15px;border-radius:10px;margin-bottom:14px;font-size:14px;border:1px solid transparent}
.alert-success{background:rgba(22,163,74,.10);color:#15803d;border-color:rgba(22,163,74,.25)}
.alert-danger{background:rgba(239,68,68,.10);color:#b91c1c;border-color:rgba(239,68,68,.25)}
.alert-info{background:rgba(37,99,235,.10);color:var(--brand);border-color:rgba(37,99,235,.25)}

/* ---------- 区块 / 网格 ---------- */
.hero{text-align:center;padding:54px 0 30px}
.hero h1{
  font-size:38px;margin:0 0 12px;color:var(--text);
  text-shadow:0 10px 48px rgba(37,99,235,.18);
}
.hero p{color:var(--muted);margin:0 0 24px;font-size:16px}
.sec-title{margin:32px 0 14px;font-size:21px;font-weight:700;color:var(--text)}
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}
.gallery{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}

/* ---------- 卡片 ---------- */
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  color:var(--text);transition:.22s;box-shadow:var(--shadow);
}
.card:hover{transform:translateY(-4px);border-color:rgba(37,99,235,.45);
  box-shadow:0 18px 44px rgba(37,99,235,.18)}
.card-cover{height:120px;background-size:cover;background-position:center;background-color:var(--panel2)}
.card-body{padding:11px 13px}
.card-body h3{margin:0 0 6px;font-size:15px}
.tag{font-size:12px;color:var(--brand);background:rgba(37,99,235,.08);padding:2px 9px;border-radius:20px}

/* ---------- 缩略图 ---------- */
.thumb{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--panel);
  border:1px solid var(--line);aspect-ratio:1/1;box-shadow:var(--shadow)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s}
.thumb .ph{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.thumb:hover img,.thumb:hover .ph{transform:scale(1.06)}
.thumb-meta{position:absolute;left:0;bottom:0;right:0;font-size:12px;padding:6px 8px;
  background:linear-gradient(transparent,rgba(15,23,42,.72));color:#fff}

/* ---------- 表单 / 面板 ---------- */
.auth-wrap,.gen-wrap,.recharge-wrap,.work-wrap{
  max-width:480px;margin:24px auto;background:var(--panel);border:1px solid var(--line);
  border-radius:18px;padding:26px;box-shadow:var(--shadow)}
.auth-wrap h2,.gen-wrap h2,.recharge-wrap h2,.work-wrap h2{margin-top:0;font-size:22px;color:var(--text)}
form label{display:block;margin-bottom:15px;font-size:14px;color:var(--muted);font-weight:600}
form input,form select,form textarea{
  width:100%;margin-top:7px;background:var(--panel);border:1px solid var(--line);
  color:var(--text);border-radius:10px;padding:11px 13px;font-size:14px;font-family:inherit;
  transition:border-color .18s,box-shadow .18s;
}
form input:focus,form select:focus,form textarea:focus{
  outline:none;border-color:var(--brand3);
  box-shadow:0 0 0 3px rgba(37,99,235,.18)}
form .checkline{display:flex;align-items:center;color:var(--text);font-weight:600}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hint{color:var(--muted);font-size:13px;line-height:1.6}

/* ---------- 表格 ---------- */
.table{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px;background:var(--panel);
  border:1px solid var(--line);border-radius:12px;overflow:hidden}
.table th,.table td{border-bottom:1px solid var(--line);padding:11px 8px;text-align:left}
.table th{color:var(--muted);font-weight:600;background:var(--panel2)}
.table tbody tr{transition:.15s}
.table tbody tr:hover{background:rgba(37,99,235,.05)}

/* ---------- 作品 / 视频详情 ---------- */
.work-meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:13px;margin:10px 0}
.work-prompt{background:var(--panel2);border-radius:10px;padding:12px;margin-bottom:14px;font-size:14px}
.work-image img,.work-image .placeholder{width:100%;border-radius:12px;display:block}
.work-image .placeholder{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;
  background:var(--panel2);color:var(--muted)}
.back{color:var(--muted);font-size:14px}

/* ---------- 后台统计卡片 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-top:16px}
.stat{
  background:linear-gradient(160deg,#ffffff,var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:var(--grad)}
.stat b{font-size:28px;display:block;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:13px}

/* ---------- 后台导航按钮（蓝色系序列） ---------- */
.admin-nav{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}
.admin-nav .btn{
  color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.22);
  background:linear-gradient(135deg,#3b82f6,#2563eb)}
.admin-nav .btn:nth-child(2){background:linear-gradient(135deg,#2563eb,#3b82f6)}
.admin-nav .btn:nth-child(3){background:linear-gradient(135deg,#0ea5e9,#2563eb)}
.admin-nav .btn:nth-child(4){background:linear-gradient(135deg,#2563eb,#0ea5e9)}
.admin-nav .btn:nth-child(5){background:linear-gradient(135deg,#3b82f6,#0ea5e9)}
.admin-nav .btn:nth-child(6){background:linear-gradient(135deg,#1d4ed8,#3b82f6)}
.admin-nav .btn:nth-child(7){background:linear-gradient(135deg,#0ea5e9,#38bdf8)}
.admin-nav .btn:hover{transform:translateY(-2px);opacity:1;
  box-shadow:0 10px 24px rgba(37,99,235,.34);filter:brightness(1.04)}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:var(--panel2)}

/* ================= 手机端样式（≤768px） ================= */
@media (max-width:768px){
  .nav{height:auto;flex-direction:column;align-items:stretch;gap:10px;padding:12px 0}
  .brand{font-size:17px}
  .menu{justify-content:center;gap:8px}
  .menu a{padding:7px 10px;font-size:13px}
  .menu > a.btn{padding:9px 16px;flex:1;text-align:center}
  .hero{padding:36px 0 20px}
  .hero h1{font-size:27px}
  .hero p{font-size:14px}
  .sec-title{font-size:19px;margin:24px 0 12px}
  .grid.cards{grid-template-columns:repeat(2,1fr)}
  .grid.gallery{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .admin-nav{gap:8px}
  .admin-nav .btn{flex:1 1 calc(50% - 8px);text-align:center}
  .auth-wrap,.gen-wrap,.recharge-wrap,.work-wrap{margin:16px auto;padding:20px}
  .main{padding:20px 12px}
}
/* 超小屏（≤420px）:单列堆叠 */
@media (max-width:420px){
  .hero h1{font-size:23px}
  .grid.cards,.grid.gallery,.stat-grid{grid-template-columns:1fr}
  .admin-nav .btn{flex:1 1 100%}
  .row{grid-template-columns:1fr}
  .menu{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .menu a{flex:0 0 auto}
}

/* ================= 后台独立布局（左侧竖排导航） ================= */
.admin-body{background:var(--bg)}
.admin-layout{display:flex;min-height:100vh}
.admin-sidebar{
  width:228px;flex:0 0 228px;background:linear-gradient(180deg,#ffffff,#f3f7fd);
  border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column;
  position:sticky;top:0;height:100vh;box-shadow:0 1px 0 rgba(37,99,235,.05)}
.admin-brand{font-weight:800;font-size:17px;color:var(--brand);padding:6px 10px 16px}
.admin-menu{display:flex;flex-direction:column;gap:6px}
.admin-menu a{
  display:block;padding:11px 14px;border-radius:10px;color:var(--muted);font-weight:600;
  font-size:14px;transition:.18s}
.admin-menu a:hover{background:rgba(37,99,235,.08);color:var(--brand)}
.admin-menu a.active{background:var(--grad);color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.28)}
.admin-side-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding-top:16px}
.admin-side-foot a{font-size:13px;color:var(--muted);padding:8px 14px;border-radius:10px}
.admin-side-foot .back:hover{background:rgba(37,99,235,.08);color:var(--brand)}
.admin-side-foot .logout{color:#b91c1c}
.admin-side-foot .logout:hover{background:rgba(239,68,68,.10);color:#b91c1c}
.admin-content{flex:1;display:flex;flex-direction:column;min-width:0}
.admin-topbar{
  height:58px;display:flex;align-items:center;justify-content:space-between;
  padding:0 22px;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.admin-title{font-weight:700;font-size:16px;color:var(--text)}
.admin-user{font-size:14px;color:var(--muted);font-weight:600}
.admin-main{flex:1;padding:24px 22px}

@media (max-width:768px){
  .admin-layout{flex-direction:column}
  .admin-sidebar{
    width:auto;flex:none;height:auto;position:static;flex-direction:row;
    align-items:center;overflow-x:auto;padding:10px}
  .admin-brand{display:none}
  .admin-menu{flex-direction:row;flex-wrap:nowrap;gap:6px}
  .admin-menu a{padding:9px 12px;white-space:nowrap}
  .admin-side-foot{flex-direction:row;margin:0 0 0 auto;padding:0}
  .admin-side-foot a{padding:9px 12px}
  .admin-main{padding:16px 12px}
}

/* ================= 后台组件体系（v3 增强） ================= */
/* 页面区块标题（带副标题 + 操作区） */
.admin-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:4px 0 16px;flex-wrap:wrap}
.admin-section-head h2{margin:0;font-size:21px;color:var(--text);font-weight:800}
.admin-section-head .sub{color:var(--muted);font-size:13px;margin-top:5px}
.admin-section-head .actions{display:flex;gap:8px;align-items:center}

/* 内容卡片 */
.admin-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.admin-card > h3{margin:0 0 14px;font-size:16px;color:var(--text);padding-left:10px;border-left:3px solid var(--brand)}
.admin-card .hint{margin-top:-6px;margin-bottom:14px}

/* 表单分组卡片 */
.form-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow);margin-bottom:20px}
.form-card > h3{margin:0 0 14px;font-size:15px;color:var(--text);font-weight:700;display:flex;align-items:center;gap:8px}
.form-card > h3::before{content:"";width:9px;height:9px;border-radius:2px;background:var(--grad)}
.form-card .btn-block{margin-top:6px}

/* 指标卡（图标 + 数值 + 副文本） */
.stat-card{
  background:linear-gradient(160deg,#ffffff,var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:7px;min-height:98px}
.stat-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad)}
.stat-card .ico{font-size:21px;line-height:1}
.stat-card .num{font-size:30px;font-weight:800;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card .lab{color:var(--muted);font-size:13px;font-weight:600}
.stat-card .tip{font-size:12px;color:var(--muted)}
.stat-card .tip.up{color:#15803d}
.stat-card .tip.down{color:#b91c1c}

/* 状态标签 */
.badge{display:inline-block;padding:2px 11px;border-radius:20px;font-size:12px;font-weight:600;line-height:1.7}
.badge-success{background:rgba(22,163,74,.13);color:#15803d}
.badge-danger{background:rgba(239,68,68,.13);color:#b91c1c}
.badge-info{background:rgba(37,99,235,.13);color:var(--brand)}
.badge-warning{background:rgba(245,158,11,.15);color:#b45309}
.badge-muted{background:rgba(107,124,147,.15);color:var(--muted)}

/* 表格增强 */
.table{box-shadow:var(--shadow)}
.table td .btn{margin:2px 6px 2px 0}
.table .muted{color:var(--muted)}
.table .ellipsis{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 顶部状态标签 */
.admin-status{display:inline-flex;align-items:center;gap:6px;font-size:13px;
  background:rgba(22,163,74,.13);color:#15803d;padding:5px 13px;border-radius:20px;font-weight:600}
.admin-status .dot{width:8px;height:8px;border-radius:50%;background:#16a34a;box-shadow:0 0 0 3px rgba(22,163,74,.22)}
.admin-topbar .btn{margin-left:10px}

/* 侧边栏分组 */
.admin-menu-label{font-size:11px;letter-spacing:1px;text-transform:uppercase;
  color:var(--muted);padding:14px 14px 5px;font-weight:700;opacity:.85}
.admin-menu-label:first-child{padding-top:2px}

/* 生图参照图上传区（前台） */
.ref-block{border:1px dashed var(--line);border-radius:14px;padding:16px;margin:6px 0 18px;background:var(--panel2)}
.ref-head{display:flex;align-items:baseline;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.ref-head > span{font-weight:700;color:var(--text);font-size:15px}
.ref-head small{color:var(--muted);font-size:12px}
#refList{display:flex;flex-direction:column;gap:10px}
.ref-row{display:flex;align-items:center;gap:10px}
.ref-row input[type=file]{flex:1}
.ref-row .ref-del{width:32px;height:32px;flex:0 0 32px;border:1px solid var(--line);
  background:var(--panel);border-radius:9px;color:#b91c1c;font-size:18px;cursor:pointer;line-height:1}
.ref-row .ref-del:hover{background:rgba(239,68,68,.10)}
.ref-thumb{width:46px;height:46px;border-radius:9px;object-fit:cover;border:1px solid var(--line)}
.btn-ghost{background:transparent;color:var(--brand);border:1px dashed var(--brand);
  box-shadow:none;font-weight:600}
.btn-ghost:hover{background:rgba(37,99,235,.06);transform:none;box-shadow:none}

/* 生图详情参照图 */
.work-refs{margin-bottom:14px;font-size:14px;color:var(--text)}
.ref-gallery{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.ref-gallery img{width:84px;height:84px;object-fit:cover;border-radius:10px;border:1px solid var(--line);
  box-shadow:var(--shadow);cursor:pointer;transition:.2s}
.ref-gallery img:hover{transform:scale(1.05)}

/* 后台：视频模型多模型管理 */
.model-list{display:flex;flex-direction:column;gap:8px;margin:4px 0 10px}
.model-list .mrow{display:flex;align-items:center;gap:8px}
.model-list .mid,.model-list .mname{flex:1;width:auto;margin:0}
.model-list .mcost{flex:0 0 96px;width:96px;margin:0}
.model-list .mdef{display:flex;align-items:center;gap:5px;white-space:nowrap;
  font-size:13px;font-weight:600;color:var(--muted);margin:0}
.model-list .mdel{flex:0 0 auto}
#modelAdd{margin-bottom:12px}
.res-cost-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:6px}
.res-cost-row span{font-size:13px;color:var(--muted);white-space:nowrap}
.res-cost-row input{width:90px;margin:0}

/* 作品广场：两大分类入口 + 子分类筛选条 */
.cat-big{display:flex;gap:14px;flex-wrap:wrap;margin:8px 0 16px}
.cat-big-item{display:flex;align-items:center;gap:10px;padding:14px 28px;border:1px solid var(--line);
  border-radius:14px;background:var(--panel);font-weight:700;font-size:16px;color:var(--text);
  text-decoration:none;transition:.2s}
.cat-big-item:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--brand)}
.cat-big-item.active{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border-color:transparent}
.cat-big-ico{font-size:20px;line-height:1}
.cat-sub{display:flex;gap:10px;flex-wrap:wrap;margin:2px 0 18px}
.chip{padding:7px 16px;border:1px solid var(--line);border-radius:999px;background:var(--panel);
  color:var(--muted);font-size:14px;text-decoration:none;transition:.2s}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}