/* 文件直链后台 —— 现代管理控制台主题 */
:root{
  --bg:#f4f6fb;
  --surface:#ffffff;
  --primary:#4f46e5;
  --primary-600:#4338ca;
  --primary-soft:#eef2ff;
  --text:#1e293b;
  --muted:#64748b;
  --border:#e7eaf1;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.05);
  --shadow:0 1px 3px rgba(16,24,40,.06), 0 8px 20px rgba(16,24,40,.05);
  --success:#16a34a; --success-bg:#dcfce7;
  --danger:#dc2626;  --danger-bg:#fee2e2;
  --warn:#d97706;    --warn-bg:#fef3c7;
  --info:#2563eb;    --info-bg:#dbeafe;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--text); font-size:14px; line-height:1.6;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ===== 布局：侧边栏 + 主区 ===== */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:236px; flex:0 0 236px;
  background:linear-gradient(180deg,#111827 0%,#0f172a 100%);
  color:#cbd5e1; display:flex; flex-direction:column;
  position:sticky; top:0; height:100vh;
}
.side-brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:700;color:#fff;padding:22px 22px 18px}
.side-brand .logo{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,#818cf8,#4f46e5);
  display:flex;align-items:center;justify-content:center;font-size:18px;
  box-shadow:0 6px 16px rgba(79,70,229,.45);
}
.side-nav{padding:6px 14px;flex:1;display:flex;flex-direction:column;gap:4px}
.side-nav a{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;
  color:#cbd5e1;font-weight:500;transition:background .15s,color .15s;
}
.side-nav a .ic{font-size:16px;width:20px;text-align:center;opacity:.9}
.side-nav a:hover{background:rgba(255,255,255,.07);color:#fff;text-decoration:none}
.side-nav a.on{background:var(--primary);color:#fff;box-shadow:0 8px 18px rgba(79,70,229,.4)}
.side-foot{padding:14px 18px;border-top:1px solid rgba(255,255,255,.08);font-size:13px}
.side-foot .who{color:#e2e8f0;margin-bottom:9px}
.side-foot .logout{display:inline-block;color:#94a3b8;padding:7px 12px;border-radius:9px;background:rgba(255,255,255,.06)}
.side-foot .logout:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  padding:0 30px;height:62px;display:flex;align-items:center;
}
.topbar-title{font-size:18px;font-weight:700;color:var(--text);letter-spacing:.2px}
.content{max-width:1440px;width:100%;margin:0 auto;padding:28px 30px 44px}

h2{margin:0 0 18px;font-size:21px}
h3{margin:0 0 14px;font-size:15px;font-weight:700;color:var(--text)}

/* ===== 卡片 ===== */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;margin-bottom:18px;box-shadow:var(--shadow-sm);
  overflow-x:auto; /* 表内不换行时，卡片内横向滚动，避免撑破布局 */
}
.card h3:first-child{margin-top:0;padding-bottom:12px;border-bottom:1px solid var(--border);margin-bottom:16px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:18px}
.cards.short{max-width:560px}
.card.stat{text-align:left;padding:16px 18px;position:relative;overflow:hidden;transition:transform .15s,box-shadow .15s}
.card.stat:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.card.stat .num{font-size:22px;font-weight:800;color:var(--text);line-height:1.2;white-space:nowrap;letter-spacing:-.3px}
.card.stat>div:last-child{color:var(--muted);font-size:12.5px;margin-top:6px}
.card.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--primary)}
.cards .stat:nth-child(1)::before{background:#6366f1}
.cards .stat:nth-child(2)::before{background:#0ea5e9}
.cards .stat:nth-child(3)::before{background:#10b981}
.cards .stat:nth-child(4)::before{background:#f59e0b}
.cards .stat:nth-child(5)::before{background:#ec4899}
.cards .stat:nth-child(6)::before{background:#8b5cf6}
.cards .stat:nth-child(7)::before{background:#14b8a6}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:900px){.grid2{grid-template-columns:1fr}}

/* ===== 设置页：功能卡片 + 弹窗 ===== */
.setting-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-bottom:18px}
.card.setting{display:flex;flex-direction:column;gap:14px;margin-bottom:0}
.setting-head{display:flex;gap:12px;align-items:flex-start}
.setting-ic{flex:0 0 42px;width:42px;height:42px;border-radius:11px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:19px}
.card .setting-head h3{border:none;padding:0;margin:0 0 3px;font-size:15px}
.setting-head p{margin:0;font-size:12.5px}
.card.setting .btn{align-self:flex-start}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.card .card-head h3{border:none;padding:0;margin:0;font-size:15px}
.form-tip{font-size:13px;margin-top:10px}

/* ===== 表格 ===== */
.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th,.tbl td{text-align:left;padding:10px 10px;border-bottom:1px solid #f1f3f8;vertical-align:middle;white-space:nowrap}
.tbl th{white-space:nowrap}
/* 文件名：不换行；超长时省略号收起（悬停 title 看全名） */
.tbl .fname{display:block;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tbl-wrap{overflow-x:auto;border-radius:var(--radius);margin:0 -18px;padding:0 18px}
.link-cell{display:flex;align-items:center;gap:8px;min-width:390px}

/* ===== 固定布局表格：按百分比分配列宽，永远铺满容器、不产生横向滚动 ===== */
.tbl.fixed{table-layout:fixed;font-size:13px}
.tbl.fixed th,.tbl.fixed td{overflow:hidden;text-overflow:ellipsis;padding-left:6px;padding-right:6px;text-align:center}
.tbl.fixed td{padding-top:9px;padding-bottom:9px}
.tbl.fixed .pw{padding:2px 5px;font-size:11.5px}
/* 文件名：居中但超长仍走省略号 */
.tbl.fixed .fname{display:block;max-width:none}
/* 直链列：只有两个复制按钮，不再放输入框；按钮组在单元格内居中 */
.tbl.fixed .link-cell{min-width:0;gap:5px;justify-content:center}
/* 列宽（合计 100%，始终铺满容器） */
.tbl.fixed col.c-chk{width:3.5%}
.tbl.fixed col.c-id{width:3.5%}
.tbl.fixed col.c-name{width:10.5%}
.tbl.fixed col.c-label{width:6%}
.tbl.fixed col.c-url{width:16%}
.tbl.fixed col.c-pw{width:6.5%}
.tbl.fixed col.c-exp{width:12.5%}
.tbl.fixed col.c-cnt{width:4.5%}
.tbl.fixed col.c-state{width:7%}
.tbl.fixed col.c-last{width:11%}
.tbl.fixed col.c-ops{width:19%}
/* 批量生成结果弹窗的表（同一套固定布局，列宽 4 列） */
.tbl.fixed .link-cell .urlbox{flex:1 1 auto;min-width:0}
#resultTbl col.r-label{width:18%}
#resultTbl col.r-url{width:52%}
#resultTbl col.r-pw{width:15%}
#resultTbl col.r-exp{width:15%}
.tbl th{background:#f8fafc;font-weight:600;color:#475569;font-size:12.5px;border-bottom:1px solid var(--border)}
.tbl tbody tr{transition:background .12s}
.tbl tbody tr:hover{background:#fafbff}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl .chk-col{width:38px;text-align:center}
.tbl input[type=checkbox]{width:16px;height:16px;cursor:pointer;accent-color:var(--primary);vertical-align:middle}
.tbl tr.sel td{background:var(--primary-soft)}
.muted{color:var(--muted)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:1px solid var(--border);background:#fff;color:var(--text);
  padding:8px 15px;border-radius:9px;cursor:pointer;font-size:13px;font-weight:500;
  transition:background .15s,border-color .15s,box-shadow .15s;line-height:1.2;
  white-space:nowrap;flex:none;
}
.btn:hover{background:#f8fafc;text-decoration:none;border-color:#d6dae3}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(79,70,229,.25)}
.btn.primary:hover{background:var(--primary-600);border-color:var(--primary-600);color:#fff}
.btn.small{padding:4px 7px;font-size:12px;border-radius:8px;margin-right:2px}
.btn.danger{color:var(--danger);border-color:#fecaca;background:#fff}
.btn.danger:hover{background:#fef2f2;border-color:#fca5a5}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* ===== 表单 ===== */
.form{max-width:560px;margin:0 auto}
.form label{display:block;margin:10px 0 4px;font-weight:600;color:#334155;font-size:13px}
.form input[type=text],.form input[type=password],.form input[type=number],
.form select,.form textarea,.form input:not([type=checkbox]):not([type=file]){
  width:100%;padding:8px 11px;border:1px solid var(--border);border-radius:9px;
  font-size:14px;background:#fff;color:var(--text);transition:border-color .15s,box-shadow .15s;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.12);
}
.form textarea{resize:vertical}
.chk{display:inline-flex;align-items:center;gap:7px;font-weight:600;color:#334155;margin:10px 18px 0 0;font-size:13.5px}
.chk input{width:auto}

/* ===== 提示与徽章 ===== */
.alert{padding:11px 14px;border-radius:10px;margin-bottom:14px;font-size:13.5px;border:1px solid transparent}
.alert-error{background:var(--danger-bg);color:var(--danger);border-color:#fecaca}
.alert-info{background:var(--info-bg);color:var(--info);border-color:#bfdbfe}
.alert-success{background:var(--success-bg);color:var(--success);border-color:#bbf7d0}
.alert-warn{background:var(--warn-bg);color:#b45309;border-color:#fde68a}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.badge.ok{background:var(--success-bg);color:var(--success)}
.badge.off{background:var(--danger-bg);color:var(--danger)}
.badge.warn{background:var(--warn-bg);color:#b45309}
.pw{background:#fff7ed;color:#c2410c;padding:2px 8px;border-radius:6px;font-size:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.pw.old{background:#f1f5f9;color:#64748b}
.urlbox{width:300px;max-width:46vw;padding:6px 9px;border:1px solid var(--border);border-radius:7px;font-size:12px;background:#f8fafc;color:#475569}
.chip{display:inline-block;background:var(--warn-bg);color:#92400e;padding:3px 10px;border-radius:999px;font-size:12px;margin:3px 5px 0 0}
.stat-line{margin:12px 0 0;font-size:13px;color:var(--muted)}
progress{width:100%;accent-color:var(--primary);height:8px;border-radius:999px}

/* ===== 复制反馈：按钮态 + 全局 toast ===== */
.btn.copied{background:var(--success-bg)!important;border-color:#86efac!important;color:var(--success)!important}
.fl-toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,16px);
  background:#111827;color:#fff;padding:11px 20px;border-radius:11px;
  font-size:13.5px;font-weight:500;box-shadow:0 12px 30px rgba(15,23,42,.35);
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:9999;
}
.fl-toast.show{opacity:1;transform:translate(-50%,0)}
.fl-toast.err{background:#b91c1c}

/* ===== 工具栏 ===== */
.tool-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.inline{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}
.inline select,.inline input{padding:7px 10px;border:1px solid var(--border);border-radius:9px;font-size:13.5px;background:#fff}
.upload-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* ===== 上传区：拖拽投放 ===== */
.dropzone{
  position:relative;border:2px dashed #c7d0e0;border-radius:14px;
  background:#fafbff;padding:28px 20px;text-align:center;cursor:pointer;
  transition:border-color .18s,background .18s,box-shadow .18s;
}
.dropzone:hover{border-color:#a5b4fc;background:#f7f8ff}
.dropzone:focus-visible{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.dropzone.over{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 4px rgba(79,70,229,.14)}
.dropzone.over .dz-icon{transform:translateY(-4px) scale(1.06)}
.dz-icon{
  width:52px;height:52px;margin:0 auto 12px;border-radius:50%;
  background:linear-gradient(135deg,#818cf8,#4f46e5);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;
  box-shadow:0 8px 20px rgba(79,70,229,.32);transition:transform .18s;
}
.dz-main{font-size:15px;font-weight:700;color:var(--text)}
.dz-sub{margin-top:5px;font-size:13px;color:var(--muted)}
.dz-pick{color:var(--primary);font-weight:600;text-decoration:underline;text-underline-offset:2px}
.dz-meta{margin-top:14px;padding-top:12px;border-top:1px dashed #e2e8f2;font-size:12.5px;color:var(--muted)}

/* 上传队列（每个文件一行：图标 / 文件名 / 大小 / 状态 / 进度 / 移除） */
.up-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.up-item{
  display:grid;grid-template-columns:22px minmax(0,1fr) auto 108px 84px 24px;
  align-items:center;gap:10px;
  padding:9px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;font-size:13px;
}
.up-ic{font-size:15px;text-align:center;line-height:1}
.up-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500;min-width:0}
.up-size{color:var(--muted);font-size:12px;white-space:nowrap}
.up-state{font-size:12px;color:var(--muted);white-space:nowrap;text-align:right;overflow:hidden;text-overflow:ellipsis}
.up-bar{height:6px;border-radius:999px;background:#eef1f7;overflow:hidden}
.up-bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,#818cf8,#4f46e5);border-radius:999px;transition:width .15s}
.up-x{border:none;background:transparent;color:#94a3b8;font-size:16px;line-height:1;cursor:pointer;padding:1px 5px;border-radius:6px}
.up-x:hover{background:#f1f5f9;color:#475569}
.up-item.running .up-state{color:var(--primary);font-weight:600}
.up-item.ok{border-color:#bbf7d0;background:#f6fef9}
.up-item.ok .up-state{color:var(--success);font-weight:600}
.up-item.ok .up-bar>i{background:var(--success)}
.up-item.err{border-color:#fecaca;background:#fff7f7}
.up-item.err .up-state{color:var(--danger);font-weight:600}
.up-item.err .up-bar>i{background:var(--danger)}
/* 客户端直接拦截（超限 / 类型不符）：根本没上传，进度条无意义，隐藏轨道 */
.up-item.rejected .up-bar{visibility:hidden}
@media (max-width:760px){
  .up-item{grid-template-columns:22px minmax(0,1fr) auto 24px}
  .up-bar,.up-size{display:none}
}

/* ===== 上传上限说明 / 环境自检 ===== */
.limit-note{
  margin:12px 0 0;padding:10px 14px;border-radius:10px;font-size:12.5px;line-height:1.75;
  background:var(--info-bg);border:1px solid #bfdbfe;color:#1e40af;
}
.limit-note.warn{background:var(--warn-bg);border-color:#fde68a;color:#92400e}
.limit-note.ok{background:var(--success-bg);border-color:#bbf7d0;color:#166534}
.limit-note a{color:inherit;text-decoration:underline;text-underline-offset:2px}
.limit-note code{
  background:rgba(255,255,255,.8);border-radius:4px;padding:1px 5px;font-size:11.5px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap;
}
.limit-why{margin-top:6px}
.limit-steps{margin-top:10px;padding-top:9px;border-top:1px dashed rgba(146,64,14,.28)}
.limit-steps ol{margin:6px 0 0;padding-left:20px}
.limit-steps li{margin:4px 0}

.limit-panel{margin-top:18px;padding-top:14px;border-top:1px solid var(--border)}
details.limit-panel>summary{
  cursor:pointer;font-size:12.5px;font-weight:700;color:#334155;letter-spacing:.02em;
  list-style:none;display:flex;align-items:center;gap:6px;border-radius:6px;padding:2px 0;
}
details.limit-panel>summary::-webkit-details-marker{display:none}
details.limit-panel>summary::before{
  content:"▸";color:var(--muted);font-size:11px;transition:transform .15s;flex:0 0 auto;
}
details.limit-panel[open]>summary::before{transform:rotate(90deg)}
details.limit-panel>summary:hover{color:var(--primary)}
.limit-panel-b{padding-top:12px}
.tbl.small{font-size:12.5px}
.tbl.small th,.tbl.small td{padding:7px 8px;white-space:normal}
/* 「当前值」很短（50 MB / 10 GB / 不限），不该被挤到换行；位置列才是需要换行的那个 */
.tbl.small th:nth-child(2),.tbl.small td:nth-child(2){white-space:nowrap}
.tbl.small td .muted{font-size:11.5px;margin-top:2px;line-height:1.5}
.tbl.small code{
  background:#f1f5f9;border-radius:4px;padding:1px 5px;font-size:11px;color:#475569;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;word-break:break-all;
}
.modal-box.mid{width:640px}

/* ===== 弹窗 ===== */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;padding:18px;z-index:50}
.modal[hidden]{display:none}
.modal-box{background:#fff;border-radius:18px;padding:24px;width:460px;max-width:100%;max-height:92vh;overflow:auto;box-shadow:0 24px 60px rgba(15,23,42,.28);animation:pop .18s ease}
@keyframes pop{from{transform:translateY(10px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.modal-box.wide{width:840px}
.modal-box h3{font-size:16px;margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.modal-box label{display:block;margin:12px 0 6px;font-weight:600;color:#334155;font-size:13px}
.modal-box input,.modal-box select,.modal-box textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;color:var(--text)}
.modal-box input::placeholder,.modal-box textarea::placeholder{color:#a3adbf}
.modal-box input:focus,.modal-box select:focus,.modal-box textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
.modal-actions.center{justify-content:center}
.modal-box.center{text-align:center}
.modal-box.center h3{text-align:center}
#qrBox{display:flex;justify-content:center;align-items:center;padding:16px;background:#fff;border-radius:10px}
#qrBox canvas, #qrBox img{display:block}

/* ===== 弹窗表单（结构化排版）===== */
/* 顶栏 / 滚动主体 / 底栏三段式，底栏常驻不随内容滚走 */
.modal-box.form{width:620px;padding:0;display:flex;flex-direction:column;max-height:92vh;overflow:hidden}
.modal-head{padding:18px 24px 14px;border-bottom:1px solid var(--border);flex:none}
.modal-head h3{margin:0;padding:0;border:0;font-size:17px;letter-spacing:-.01em;line-height:1.35}
.modal-sub{margin:4px 0 0;font-size:12.5px;color:var(--muted);font-weight:400;line-height:1.55}
.modal-box.form form{display:flex;flex-direction:column;min-height:0;flex:1}
.form-body{padding:18px 24px 16px;overflow:auto;flex:1;min-height:0}
.modal-foot{padding:12px 24px;border-top:1px solid var(--border);background:#fafbfe;display:flex;gap:10px;justify-content:flex-end;flex:none;border-radius:0 0 18px 18px}
.modal-foot .btn{padding:9px 20px}

/* 分区：虚线分隔 + 小标题 + 尾巴发丝线 */
.form-sec+.form-sec{margin-top:18px;padding-top:18px;border-top:1px dashed var(--border)}
.form-sec-t{display:flex;align-items:center;gap:10px;margin:0 0 14px;font-size:11.5px;font-weight:700;color:var(--muted);letter-spacing:.09em}
.form-sec-t::after{content:"";flex:1;height:1px;background:var(--border)}

/* 字段 */
.f{margin-bottom:14px}
.f:last-child{margin-bottom:0}
.f-row{display:grid;gap:16px;align-items:start}
.f-row.c2{grid-template-columns:1fr 1fr}
.f-row+.f{margin-top:14px}
.f-row .f{margin-bottom:0}
.f-label{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-weight:600;color:#334155;font-size:13px;line-height:1.45;margin-bottom:7px}
.f-label .req{color:#e11d48;font-weight:700}
.f-badge{font-weight:500;font-size:11px;color:var(--muted);background:#f1f5f9;border:1px solid var(--border);border-radius:999px;padding:1px 8px;line-height:1.6;white-space:nowrap}
.f-hint{margin:7px 0 0;font-size:12px;color:var(--muted);line-height:1.55}
.f-hint code{background:#f1f5f9;border-radius:4px;padding:1px 5px;font-size:11.5px;color:#475569}
.modal-box.form textarea{resize:vertical;min-height:84px;line-height:1.6}
.modal-box.form input[type=number],.modal-box.form input[type=datetime-local]{font-variant-numeric:tabular-nums}
.callout{display:flex;gap:10px;margin-top:14px;padding:12px 14px;background:#f8fafc;border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:10px;font-size:12.5px;color:#475569;line-height:1.7}
.form-sec-t+.callout{margin-top:0}
.callout+.f{margin-top:14px}
.callout-ic{flex:none;font-size:14px;line-height:1.5}
.callout b{color:#334155;font-weight:600}
@media (max-width:680px){
  .modal-box.form{width:100%}
  .f-row.c2{grid-template-columns:1fr}
}

/* ===== 登录 ===== */
.login-wrap{
  display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:
    radial-gradient(1100px 560px at 18% 8%, #e0e7ff 0%, transparent 55%),
    linear-gradient(135deg,#4f46e5 0%,#7c3aed 100%);
}
.login-card{background:#fff;border:1px solid rgba(255,255,255,.6);border-radius:18px;padding:36px 34px;width:360px;box-shadow:0 30px 70px rgba(15,23,42,.35)}
.login-card h1{margin:0 0 6px;font-size:22px;display:flex;align-items:center;gap:10px}
.login-card label{display:block;margin:14px 0 6px;font-weight:600;color:#334155}
.login-card input{width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:10px;font-size:14px;background:#fff}
.login-card input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.login-card .btn{width:100%;margin-top:18px;padding:11px;font-size:15px}
.login-card .muted{color:var(--muted)}

/* ===== 公开下载页（dl.php）===== */
.dl-wrap{
  display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px;
  background:
    radial-gradient(1100px 560px at 18% 8%, #e0e7ff 0%, transparent 55%),
    linear-gradient(135deg,#4f46e5 0%,#7c3aed 100%);
}
.dl-card{
  background:#fff;border:1px solid rgba(255,255,255,.6);border-radius:18px;
  padding:34px 32px;width:440px;max-width:100%;text-align:center;
  box-shadow:0 30px 70px rgba(15,23,42,.35);
}
.dl-card .dl-ic{font-size:40px;line-height:1}
.dl-card h1{margin:12px 0 2px;font-size:18px;line-height:1.45;word-break:break-all}
/* 信息两行：文件大小 / （链接有效期 + 可下载次数）
   注意：这里用 block + 行内元素，不要用 flex —— flex 会把「标签文字」和 <b>值</b>
   当成两个子项而套上 gap，导致「文件大小：」和值之间莫名出现大空隙 */
.dl-card .dl-meta{display:flex;flex-direction:column;gap:8px;align-items:center;margin:18px 0 2px;color:var(--muted);font-size:12.5px}
.dl-card .dl-meta-row{display:block;text-align:center}
.dl-card .dl-meta-row>span+span{margin-left:22px}
.dl-card .dl-meta>b{margin-left:2px;color:var(--text);font-size:13.5px;font-weight:700}
.dl-card .btn{display:block;width:100%;margin-top:20px;padding:12px;font-size:15px;text-align:center}
.dl-card .dl-note{margin:14px 0 0;font-size:12.5px;color:var(--muted);line-height:1.7}
.dl-card .dl-err{margin:10px 0 0;font-size:14px;color:var(--danger);font-weight:600}

/* ===== 响应式：侧边栏转为顶部导航 ===== */
@media(max-width:900px){
  .layout{flex-direction:column}
  .sidebar{width:100%;flex:none;height:auto;position:static;flex-direction:row;align-items:center;flex-wrap:wrap}
  .side-brand{padding:12px 16px;flex:1}
  .side-nav{flex-direction:row;padding:0 10px;gap:2px;overflow-x:auto}
  .side-nav a{padding:9px 12px;white-space:nowrap}
  .side-foot{display:none}
  .topbar{height:54px;padding:0 16px}
  .content{padding:18px 16px 32px}
}
@media(max-width:640px){
  .form-row{grid-template-columns:1fr}
}