:root{
  --primary:#4f46e5;--primary-d:#4338ca;--bg:#f5f6fa;--card:#fff;
  --text:#1f2937;--muted:#6b7280;--border:#e5e7eb;--ok:#16a34a;--err:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--primary);text-decoration:none}
.topnav{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.nav-inner{max-width:1080px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 16px;height:54px}
.brand{color:#fff;font-weight:700;font-size:17px}
.brand span{font-weight:400;opacity:.8;font-size:13px}
.nav-links{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.nav-links a{color:#fff;opacity:.92;font-size:14px;padding:4px 6px}
.nav-links a:hover{opacity:1}
.nav-right{margin-left:6px;background:rgba(255,255,255,.15);border-radius:6px}
.container{max-width:1080px;margin:20px auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:22px;margin-bottom:18px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
/* 登录页：纯净渐变背景 + 居中登录卡片 */
.login-page{min-height:100vh;width:100%;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#1e3a8a 0%,#4f46e5 55%,#7c3aed 100%);padding:20px;
  box-sizing:border-box}
.login-card{width:min(380px,92vw);background:#fff;border-radius:18px;padding:36px 32px 30px;
  box-shadow:0 24px 60px rgba(0,0,0,.28);text-align:center;animation:fadeUp .5s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.login-card .brand-lg{font-size:22px;font-weight:800;color:var(--primary);margin-bottom:6px;letter-spacing:1px}
.login-card h1{font-size:24px;margin:0 0 4px;color:#111827}
.login-card .sub{color:var(--muted);font-size:13px;margin:0 0 22px}
.login-card label{text-align:left}
.login-card .btn-block{margin-top:18px}
.login-card .back{display:inline-block;margin-top:14px;font-size:13px}

/* 首页落地宣传页（现代风格 + 装饰） */
.land-page{position:relative;min-height:100vh;width:100%;overflow:hidden;
  display:flex;flex-direction:column;align-items:center;color:#fff;
  background:linear-gradient(135deg,#1e3a8a 0%,#4f46e5 55%,#7c3aed 100%)}
/* 装饰光斑 */
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;z-index:0;pointer-events:none}
.orb-1{width:440px;height:440px;background:#22d3ee;top:-130px;left:-90px;animation:float1 9s ease-in-out infinite}
.orb-2{width:400px;height:400px;background:#f472b6;bottom:-110px;right:-70px;animation:float2 11s ease-in-out infinite}
.orb-3{width:340px;height:340px;background:#a78bfa;top:38%;left:58%;animation:float1 13s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translateY(0)}50%{transform:translateY(34px)}}
@keyframes float2{0%,100%{transform:translateY(0)}50%{transform:translateY(-28px)}}
/* 点阵网格 */
.land-grid{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.40;
  background-image:radial-gradient(rgba(255,255,255,.28) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(circle at 50% 38%,#000 28%,transparent 78%);
  mask-image:radial-gradient(circle at 50% 38%,#000 28%,transparent 78%)}
/* 顶部导航 */
.land-nav{position:relative;z-index:2;width:100%;max-width:1120px;display:flex;
  align-items:center;justify-content:space-between;padding:18px 22px;box-sizing:border-box}
.land-nav .brand{font-weight:800;font-size:18px}
.land-nav .brand span{font-weight:400;opacity:.8;font-size:13px;margin-left:6px}
.btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.30);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
/* hero（偏上居中） */
.land-hero{position:relative;z-index:2;margin-top:9vh;text-align:center;padding:0 20px;max-width:780px}
.land-badge{display:inline-block;padding:6px 16px;border:1px solid rgba(255,255,255,.55);
  border-radius:999px;font-size:13px;letter-spacing:2px;margin-bottom:22px;backdrop-filter:blur(2px)}
.land-title{font-size:clamp(32px,6.5vw,56px);font-weight:800;margin:0 0 18px;letter-spacing:1px;
  text-shadow:0 2px 16px rgba(0,0,0,.35);animation:fadeUp .6s ease both}
.land-lead{font-size:clamp(14px,2.2vw,18px);line-height:1.9;color:rgba(255,255,255,.95);
  max-width:640px;margin:0 auto 32px;animation:fadeUp .7s ease both}
.land-hero .btn-cta{animation:fadeUp .8s ease both}
.btn-cta{padding:14px 42px;font-size:17px;border-radius:10px;letter-spacing:1px}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
/* 特性卡片 */
.features{position:relative;z-index:2;width:100%;max-width:1040px;display:grid;
  grid-template-columns:repeat(3,1fr);gap:18px;padding:46px 22px 30px;box-sizing:border-box}
.feat-card{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.20);
  border-radius:16px;padding:24px 20px;backdrop-filter:blur(8px);text-align:left;
  transition:transform .2s ease,background .2s ease;animation:fadeUp .9s ease both}
.feat-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.16)}
.feat-ico{font-size:30px;margin-bottom:12px}
.feat-card h3{margin:0 0 8px;font-size:17px;color:#fff}
.feat-card p{margin:0;font-size:14px;line-height:1.7;color:rgba(255,255,255,.85)}
.land-foot{position:relative;z-index:2;font-size:13px;color:rgba(255,255,255,.7);padding:10px 0 26px}
@media(max-width:760px){.features{grid-template-columns:1fr}.land-hero{margin-top:6vh}}
h2{margin-top:0}
label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:#fff;color:var(--text)}
textarea{resize:vertical;min-height:80px}
.btn{display:inline-block;padding:9px 16px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--text);cursor:pointer;font-size:14px}
.btn:hover{background:#f3f4f6}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-sm{padding:5px 10px;font-size:13px}
.btn-danger{border-color:var(--err);color:var(--err)}
.btn-danger:hover{background:var(--err);color:#fff}
.alert{padding:10px 14px;border-radius:8px;margin:10px 0;font-size:14px}
.alert-info{background:#eef2ff;color:#3730a3}
.alert-success{background:#dcfce7;color:#166534}
.alert-error{background:#fee2e2;color:#991b1b}
.muted{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
th{background:#f9fafb;color:var(--muted);font-weight:600}
tr:hover td{background:#fcfcfd}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px}
.stat .num{font-size:26px;font-weight:700;color:var(--primary)}
.stat .lbl{color:var(--muted);font-size:13px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.row > div{flex:1;min-width:160px}
.item-row{border:1px dashed var(--border);border-radius:8px;padding:10px;margin-bottom:10px;background:#fafafa}
.item-row label{margin-top:6px}
.help{font-size:12px;color:var(--muted);margin-top:2px}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:#eef2ff;color:#3730a3}
.tag.link{background:#dcfce7;color:#166534}
.tag.off{background:#fee2e2;color:#991b1b}
.pwd-toggle{cursor:pointer;color:var(--primary);font-size:12px;user-select:none}