:root{
  --brand:#3b5bdb; --brand-d:#2f49b0; --bg:#f4f6fb; --card:#fff; --line:#e6e9f2;
  --text:#1f2533; --muted:#6b7486; --ok:#12b886; --warn:#f59f00; --err:#e03131; --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.6;display:flex;flex-direction:column;min-height:100vh}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{flex:1;width:100%;max-width:1080px;margin:0 auto;padding:24px 18px 48px}

/* nav */
.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.nav-inner{max-width:1080px;margin:0 auto;padding:0 18px;height:60px;display:flex;align-items:center;gap:22px}
.brand{font-size:17px;font-weight:700;color:var(--text)}
.brand .logo{color:var(--brand)}
.menu{display:flex;gap:18px;flex:1}
.menu a{color:#48506a;font-weight:500}
.menu a.admin-link{color:#d9480f}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-right .bal{color:var(--muted)}
.nav-right .bal b{color:var(--brand)}
.nav-right .who{color:var(--text);font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 16px;border-radius:9px;border:1px solid transparent;cursor:pointer;font-size:14px;font-weight:600;font-family:inherit;transition:.15s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-d);text-decoration:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:#c8cfe0;text-decoration:none}
.btn-danger{background:#fff;border-color:#ffd3d3;color:var(--err)}
.btn-danger:hover{background:#fff5f5}
.btn-sm{height:30px;padding:0 10px;font-size:13px;border-radius:7px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px}
.card h2{margin:0 0 14px;font-size:17px}
.card h3{margin:0 0 12px;font-size:15px}

/* forms */
.field{margin-bottom:14px}
.field label{display:block;margin-bottom:6px;font-weight:600;color:#39415a;font-size:13px}
.input{width:100%;height:42px;padding:0 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;color:var(--text)}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(59,91,219,.12)}
select.input{height:42px}
textarea.input{height:auto;padding:10px 12px;min-height:80px;resize:vertical}
.hint{color:var(--muted);font-size:12px;margin-top:5px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}

/* tables */
.table{width:100%;border-collapse:collapse;font-size:13.5px}
.table th,.table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.table th{color:var(--muted);font-weight:600;background:#fafbfe}
.table tr:hover td{background:#fafbff}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}

/* misc */
.flash{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-weight:500}
.flash-success{background:#e6fcf5;color:#0b7285;border:1px solid #c3fae8}
.flash-error{background:#fff5f5;color:#c92a2a;border:1px solid #ffc9c9}
.flash-info{background:#eef2ff;color:#364fc7;border:1px solid #dbe4ff}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.tag-green{background:#e6fcf5;color:#0ca678}
.tag-grey{background:#f1f3f5;color:#868e96}
.tag-blue{background:#edf2ff;color:#3b5bdb}
.tag-red{background:#fff5f5;color:#e03131}
.tag-amber{background:#fff9db;color:#e67700}
.muted{color:var(--muted)}
.money{color:var(--brand);font-weight:700}
.row-between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stat .n{font-size:24px;font-weight:800;color:var(--brand)}
.stat .l{color:var(--muted);font-size:13px;margin-top:4px}
.code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#f1f3f5;padding:2px 8px;border-radius:6px;letter-spacing:1px}
.center{text-align:center}
.hero{text-align:center;padding:56px 18px 30px}
.hero h1{font-size:34px;margin:0 0 12px}
.hero p{color:var(--muted);font-size:16px;margin:0 0 26px}
.hero .actions{display:flex;gap:12px;justify-content:center}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:720px){.plans{grid-template-columns:1fr}}
.plan{border:1px solid var(--line);border-radius:14px;padding:22px;background:#fff;display:flex;flex-direction:column}
.plan .p-name{font-weight:700;font-size:16px}
.plan .p-price{font-size:26px;font-weight:800;color:var(--brand);margin:10px 0}
.plan .p-feat{color:var(--muted);font-size:13px;flex:1;margin-bottom:14px}
.foot{border-top:1px solid var(--line);background:#fff;text-align:center;color:var(--muted);font-size:12.5px;padding:18px}
.side{display:flex;gap:18px;align-items:flex-start}
.side .side-menu{width:180px;flex:0 0 180px}
.side-menu a{display:block;padding:9px 12px;border-radius:9px;color:#48506a;font-weight:500;margin-bottom:4px}
.side-menu a.active{background:#edf2ff;color:var(--brand);font-weight:700}
.side .side-main{flex:1;min-width:0}
@media(max-width:720px){.side{flex-direction:column;align-items:stretch}.side .side-menu{width:100%;flex:none;display:flex;gap:6px;flex-wrap:wrap}.side .side-main{width:100%;min-width:0}}

/* ================= 移动端自适应 ================= */
img,table{max-width:100%}
@media (max-width:820px){
  .nav-inner{height:auto;min-height:56px;flex-wrap:wrap;gap:10px 14px;padding:10px 14px}
  .menu{order:3;flex-basis:100%;gap:14px;flex-wrap:wrap;font-size:13.5px}
  .nav-right{margin-left:auto}
  .brand{font-size:16px}
  .container{padding:16px 12px 40px}
  .card{padding:16px}
  .hero{padding:32px 12px 20px}
  .hero h1{font-size:26px}
  .hero p{font-size:15px;margin-bottom:20px}
  .stats{grid-template-columns:repeat(2,1fr);gap:10px}
  .stat{padding:14px}
  .stat .n{font-size:20px}
  .grid2{grid-template-columns:1fr}
  .plans{grid-template-columns:1fr}
  .side .side-menu{display:flex;gap:6px;flex-wrap:wrap}
  .side-menu a{margin-bottom:0;padding:7px 12px;background:#fff;border:1px solid var(--line)}
  .side-menu a.active{border-color:#c7d2fe}
  .row-between{gap:8px}
  .table th,.table td{padding:8px 10px;font-size:13px}
  .foot{padding:14px}
  .flash{padding:10px 12px;font-size:13.5px}
}
@media (max-width:480px){
  .hero h1{font-size:21px}
  .hero .actions{flex-direction:column}
  .hero .actions .btn{width:100%}
  .card{padding:13px}
  .plan{padding:16px}
  .nav-right{gap:8px}
  .nav-right .bal{font-size:12.5px}
}

/* ===== 窄屏：表格转为卡片（label:value 堆叠） ===== */
@media (max-width:820px){
  .table-wrap{border:none;border-radius:0;overflow:visible}
  .table{display:block}
  .table thead{display:none}
  .table tbody{display:block}
  .table tr{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:6px 12px}
  .table td{display:flex;justify-content:space-between;align-items:center;gap:14px;border:none;padding:7px 0;white-space:normal;text-align:right;border-bottom:1px dashed #eef1f7}
  .table tr td:last-child{border-bottom:none}
  .table td::before{content:attr(data-label);color:var(--muted);font-weight:600;flex:0 0 auto;text-align:left;margin-right:auto}
  .table td[colspan]::before{content:''}
  .table td .code{font-size:12px}
  .table td:has(> span.muted:only-child)::before{content:attr(data-label)}
}


/* ================= 汉堡菜单（≡） ================= */
.hamburger{display:inline-flex;align-items:center;justify-content:center;width:40px;height:38px;font-size:22px;line-height:1;background:#fff;border:1px solid var(--line);border-radius:9px;cursor:pointer;color:var(--text);flex:0 0 auto;font-family:inherit}
.hamburger:hover{border-color:#c8cfe0;background:#f8faff}
.drawer-mask{position:fixed;inset:0;background:rgba(15,20,35,.45);opacity:0;visibility:hidden;transition:.2s;z-index:40}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;left:0;bottom:0;width:264px;max-width:84%;background:#fff;z-index:50;transform:translateX(-102%);transition:transform .22s ease;box-shadow:6px 0 28px rgba(0,0,0,.14);display:flex;flex-direction:column;overflow-y:auto}
body.drawer-open .drawer{transform:none}
.drawer-head{padding:16px 18px;font-weight:700;border-bottom:1px solid var(--line);font-size:15px}
.drawer-nav{display:flex;flex-direction:column;padding:8px}
.drawer-nav a{padding:11px 14px;border-radius:9px;color:#39415a;font-weight:500}
.drawer-nav a:hover,.drawer-nav a.active{background:#edf2ff;color:var(--brand);text-decoration:none}
.drawer-sep{padding:14px 14px 4px;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.5px}
.drawer-foot{margin-top:auto;padding:14px 18px;border-top:1px solid var(--line)}