/* ============================================================
   证书申领系统 · 全站样式
   设计语言：现代 SaaS 风格 / 靛蓝色主色 / 精细阴影 / 柔和过渡
   ============================================================ */
:root{
  --bg:#f1f5f9;
  --card:#ffffff;
  --line:#e2e8f0;
  --text:#0f172a;
  --heading:#1e293b;
  --muted:#64748b;
  --brand:#4f46e5;
  --brand-light:#6366f1;
  --brand-dark:#4338ca;
  --brand-grad:linear-gradient(135deg,#4f46e5 0%,#7c3aed 100%);
  --brand-soft:#eef2ff;
  --brand-border:#c7d2fe;
  --green:#059669;--green-soft:#d1fae5;
  --red:#dc2626;--red-soft:#fee2e2;
  --orange:#d97706;--orange-soft:#fef3c7;
  --purple:#7c3aed;--cyan:#0891b2;--dark:#0f172a;
  --radius:12px;--radius-lg:16px;--radius-sm:8px;
  --shadow-sm:0 1px 2px rgba(0,0,0,.05);
  --shadow:0 1px 3px rgba(0,0,0,.06),0 4px 16px rgba(0,0,0,.06);
  --shadow-lg:0 4px 24px rgba(0,0,0,.1),0 1px 4px rgba(0,0,0,.06);
  --transition:all .2s cubic-bezier(.4,0,.2,1);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:14px/1.7 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none;transition:color .15s}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{margin:0 0 14px;color:var(--heading);font-weight:700;letter-spacing:-.01em}
h2{font-size:18px}
h3{font-size:15px}

/* ---- 布局骨架 ---- */
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---- 顶部导航栏 ---- */
.topbar{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;box-shadow:var(--shadow-sm)}
.topbar .inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:6px;height:64px}
.logo{font-size:17px;font-weight:800;color:var(--heading);display:flex;align-items:center;gap:10px;letter-spacing:-.02em;white-space:nowrap}
.logo img{height:38px;width:auto;object-fit:contain;border-radius:6px}
.logo .logo-mark{width:32px;height:32px;border-radius:9px;background:var(--brand-grad);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;flex-shrink:0}
.logo .logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo .logo-text small{font-size:10px;font-weight:500;color:var(--muted);letter-spacing:.05em}
.nav{display:flex;gap:2px;margin-left:16px;flex:1;overflow-x:auto}
.nav a{color:var(--muted);font-weight:600;font-size:13.5px;padding:8px 14px;border-radius:var(--radius-sm);transition:var(--transition);white-space:nowrap}
.nav a:hover{color:var(--brand);background:var(--brand-soft);text-decoration:none}
.nav a.active{color:var(--brand);background:var(--brand-soft)}
.topbar .user-area{display:flex;align-items:center;gap:12px;margin-left:auto;flex-shrink:0}
.topbar .user-name{font-size:13px;color:var(--muted);white-space:nowrap}

/* ---- 主内容区 ---- */
.main{padding:28px 0 0;min-height:calc(100vh - 64px - 180px)}

/* ---- 卡片 ---- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px;margin-bottom:20px;transition:box-shadow .2s}
.card:hover{box-shadow:var(--shadow)}
.card h2{font-size:16px;font-weight:700;color:var(--heading);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.card.center{text-align:center;padding:56px 24px}
.card.center h2{border:0;padding:0}

/* ---- 网格 ---- */
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.grid.c3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid.c4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}

/* ---- 文字 ---- */
.muted{color:var(--muted)}
.small{font-size:12.5px;line-height:1.6}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);border:1px solid transparent;background:var(--brand);color:#fff;font-weight:600;cursor:pointer;font-size:13.5px;transition:var(--transition);text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--brand-dark);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 4px 12px rgba(79,70,229,.3)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent;color:var(--brand);border-color:var(--brand-border)}
.btn.ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn.gray{background:#f1f5f9;color:var(--muted);border-color:var(--line)}
.btn.gray:hover{background:#e2e8f0;color:var(--heading)}
.btn.danger{background:#fef2f2;color:var(--red);border-color:#fecaca}
.btn.danger:hover{background:#fee2e2;border-color:var(--red)}
.btn.sm{padding:6px 14px;font-size:12.5px;border-radius:7px}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none!important}

/* ---- 表格 ---- */
.table-wrap{overflow-x:auto;border-radius:var(--radius-sm);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{background:#f8fafc;color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em;white-space:nowrap}
tr:last-child td{border-bottom:0}
tr:hover td{background:#f8fafc}

/* ---- 标签 ---- */
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:600;line-height:1.5;letter-spacing:.01em}
.badge.blue{background:#e0e7ff;color:#4338ca}.badge.green{background:#d1fae5;color:#065f46}
.badge.red{background:#fee2e2;color:#b91c1c}.badge.orange{background:#fef3c7;color:#92400e}
.badge.purple{background:#ede9fe;color:#6d28d9}.badge.cyan{background:#cffafe;color:#155e75}
.badge.gray{background:#f1f5f9;color:#64748b}.badge.dark{background:#1e293b;color:#f1f5f9}

/* ---- KPI 指标卡 ---- */
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;transition:var(--transition)}
.kpi:hover{box-shadow:var(--shadow)}
.kpi .v{font-size:28px;font-weight:800;margin-top:4px;color:var(--heading);letter-spacing:-.02em}
.kpi .l{color:var(--muted);font-size:12.5px;font-weight:500}
.kpi.warn{border-color:#fcd34d;background:#fffbeb}
.kpi.bad{border-color:#fca5a5;background:#fef2f2}

/* ---- 表单 ---- */
form .field{margin-bottom:16px}
label{display:block;font-weight:600;margin-bottom:6px;font-size:13px;color:var(--heading)}
input[type=text],input[type=password],input[type=number],input[type=file],input[type=email],input[type=url],input[type=tel],input[type=date],select,textarea{
  width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);font:inherit;background:#fff;transition:border-color .15s,box-shadow .15s;color:var(--text)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
input::placeholder,textarea::placeholder{color:#94a3b8}
.hint{color:var(--muted);font-size:12px;margin-top:5px;line-height:1.5}

/* ---- 提示 ---- */
.alert{padding:14px 18px;border-radius:var(--radius-sm);margin-bottom:18px;font-weight:500;line-height:1.6}
.alert.success{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert.error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert.info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

/* ---- 进度步骤 ---- */
.steps{display:flex;margin:8px 0 8px;overflow-x:auto;padding:8px 0}
.step{flex:1;min-width:100px;text-align:center;position:relative;padding:0 4px}
.step .dot{width:32px;height:32px;border-radius:50%;background:#e2e8f0;color:var(--muted);display:flex;align-items:center;justify-content:center;margin:0 auto 8px;font-size:13px;font-weight:700;transition:var(--transition);position:relative;z-index:1}
.step.done .dot{background:var(--brand);color:#fff}
.step.current .dot{background:#fff;border:3px solid var(--brand);color:var(--brand);box-shadow:0 0 0 4px rgba(79,70,229,.15)}
.step .t{font-size:12px;color:var(--muted);font-weight:500;white-space:nowrap}
.step.done .t,.step.current .t{color:var(--heading);font-weight:600}
.step:not(:last-child):after{content:"";position:absolute;top:16px;left:calc(50% + 20px);width:calc(100% - 40px);height:2px;background:#e2e8f0}
.step.done:not(:last-child):after{background:var(--brand)}

/* ---- 时间线 ---- */
.timeline{border-left:2px solid var(--line);margin-left:10px;padding-left:20px}
.timeline .item{position:relative;padding-bottom:18px}
.timeline .item:before{content:"";position:absolute;left:-27px;top:6px;width:11px;height:11px;border-radius:50%;background:var(--brand);border:2px solid #fff;box-shadow:0 0 0 1px var(--brand)}
.timeline .item.muted:before{background:#cbd5e1;border-color:#fff}

/* ---- 材料 ---- */
.file{display:flex;gap:14px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:var(--radius);background:#fafbfc;margin-bottom:12px;transition:var(--transition)}
.file:hover{border-color:var(--brand-border);background:var(--brand-soft)}
.file .thumb{width:56px;height:56px;border-radius:var(--radius-sm);background:#e2e8f0;display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--muted);overflow:hidden;flex-shrink:0}
.file .thumb img{width:100%;height:100%;object-fit:cover;border-radius:inherit}

/* ---- 驳回 ---- */
.reject{border-left:3px solid var(--red);background:#fef2f2;border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:14px 16px;margin-bottom:12px}
.reject .label{font-weight:700;color:#991b1b}

/* ---- 标签选择 ---- */
.tag-pick{display:flex;flex-wrap:wrap;gap:8px}
.tag-pick label{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:20px;padding:6px 14px;background:#fff;cursor:pointer;font-weight:500;font-size:13px;transition:var(--transition)}
.tag-pick label:hover{border-color:var(--brand-border);background:var(--brand-soft)}
.tag-pick input{width:auto;margin:0}
.tag-pick label.on{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}

/* ---- 后台侧边栏 ---- */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:220px;background:#0f172a;color:#cbd5e1;padding:16px 0;overflow-y:auto;overflow-x:hidden}
.sidebar::-webkit-scrollbar{width:4px}
.sidebar::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}
.sidebar .brand{color:#fff;font-weight:700;padding:0 20px 16px;font-size:15px;border-bottom:1px solid #1e293b;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.sidebar .brand img{height:32px;width:auto;object-fit:contain}
.sidebar .brand .logo-mark{width:28px;height:28px;border-radius:8px;background:var(--brand-grad);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:800;flex-shrink:0}
.sidebar a{display:block;color:#94a3b8;padding:9px 20px;font-size:13px;font-weight:500;transition:var(--transition)}
.sidebar a:hover,.sidebar a.active{background:rgba(99,102,241,.12);color:#a5b4fc;text-decoration:none}
.sidebar .who{padding:14px 20px;font-size:12px;color:#64748b;border-top:1px solid #1e293b;margin-top:12px}
.sidebar .who a{display:inline;padding:0;color:#818cf8}
.admin-main{margin-left:220px;padding:28px 32px 60px;min-height:100vh;background:var(--bg)}

/* ---- 工具栏 / 筛选 ---- */
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.toolbar input[type=text],.toolbar select{width:auto;min-width:150px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{padding:5px 14px;border-radius:20px;border:1px solid var(--line);background:#fff;font-size:12.5px;color:var(--muted);font-weight:500;transition:var(--transition)}
.chip:hover{border-color:var(--brand-border);color:var(--brand)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* ---- 进度条 ---- */
.bar{height:8px;border-radius:6px;background:#e2e8f0;overflow:hidden}
.bar i{display:block;height:100%;background:var(--brand-grad);border-radius:6px;transition:width .3s}

/* ---- 对比 ---- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.compare .box{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;background:#fafbfc}

/* ---- 工具类 ---- */
.center{text-align:center}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mb0{margin-bottom:0}
.pre{white-space:pre-wrap;word-break:break-all}
.qr{background:#fff;padding:16px;border-radius:var(--radius);border:1px solid var(--line);display:inline-block;font-size:12px;word-break:break-all;max-width:420px}

/* ---- 登录选项卡 ---- */
.tabs{display:flex;flex-wrap:wrap;gap:0;border-bottom:2px solid var(--line);padding:0;margin-top:20px}
.tabs .tab{padding:12px 22px;font-size:13.5px;font-weight:600;color:var(--muted);border:none;border-bottom:3px solid transparent;margin-bottom:-2px;background:none;cursor:pointer;transition:var(--transition)}
.tabs .tab:hover{color:var(--brand)}
.tabs .tab.active{color:var(--brand);border-bottom-color:var(--brand);background:transparent}
.tabs button.tab{font:inherit;cursor:pointer}
.tab-panel{padding:20px 0}
.tab-panel form{margin:0}
.tabs-bar{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.tabs-bar .tabs{flex:1 1 auto;margin-bottom:0}

/* ---- 验证码行 ---- */
.code-row{display:flex;gap:8px}
.code-row input{flex:1 1 auto;min-width:0;width:auto}
.code-row .btn{flex:0 0 auto;white-space:nowrap}
.captcha-img{flex:0 0 auto;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;cursor:pointer}

/* ---- 设置页选项卡 ---- */
.tabs-bar{margin-bottom:20px}
.tabs-bar .btn{margin-bottom:0}
.tab-panel > .card{background:#f8fafc;box-shadow:none;border-style:dashed;margin-top:14px}

/* ---- 表单设计器 ---- */
.frow{display:grid;grid-template-columns:84px 1.1fr 1.1fr 78px 2fr 190px;gap:10px;align-items:start;padding:10px 0;border-bottom:1px solid #f1f5f9}
.frow.fhead{font-size:11px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:6px;font-weight:600}
.frow input[type=text],.frow select,.frow textarea{width:100%;margin:0}
.frow .seq{color:var(--muted);font-size:13px;padding-top:8px;display:flex;align-items:center;flex-wrap:wrap;gap:4px}
.frow .seq input.sortno{width:54px;margin:0;padding:6px 4px;text-align:center;font-weight:600}
.frow .facts{display:flex;flex-wrap:wrap;gap:6px}
.frow.mrow{grid-template-columns:56px 1.15fr 84px 200px 2fr 92px}
.frow.mrow .fmt{display:flex;gap:10px;flex-wrap:wrap}
.frow.mrow .fmt label{display:inline-flex;align-items:center;gap:4px}
.frow.mrow input[type=number]{width:100%}
.mb16{margin-bottom:16px}
hr{border:0;border-top:1px solid var(--line);margin:20px 0}
@media(max-width:900px){.frow{grid-template-columns:1fr}.frow.fhead{display:none}}

/* ---- 动态字段辅助 ---- */
.field-help{margin-top:5px;font-size:12px;line-height:1.5;color:var(--muted)}
.field-link{margin-top:4px;font-size:12px}
.field-link a{font-weight:500}
.field-link a::before{content:"⤓ "}
.field-rule{margin-top:4px;font-size:12px;color:var(--orange);font-weight:500}

/* ---- 强制绑定阻断 ---- */
.card.modal-card{max-width:560px;margin:48px auto;border:2px solid var(--orange);box-shadow:var(--shadow-lg)}
.card.modal-card h2{margin-top:0}

/* ---- 侧边栏菜单分组 ---- */
.sidebar details.nav-group summary{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 20px;font-size:13px;color:#94a3b8;font-weight:600;cursor:pointer;list-style:none;user-select:none;transition:var(--transition)}
.sidebar details.nav-group summary::-webkit-details-marker{display:none}
.sidebar details.nav-group summary::marker{content:""}
.sidebar details.nav-group summary:hover{background:rgba(99,102,241,.12);color:#a5b4fc}
.sidebar details.nav-group summary .arrow{font-size:10px;opacity:.65;transition:transform .15s}
.sidebar details.nav-group[open] summary .arrow{transform:rotate(90deg)}
.sidebar details.nav-group .sub a{padding-left:36px;font-size:12.5px}
.sidebar details.nav-group .sub a:hover,.sidebar details.nav-group .sub a.active{color:#a5b4fc;background:rgba(99,102,241,.12)}

/* ---- 折叠面板 summary 按钮外观 ---- */
details > summary.btn{list-style:none;cursor:pointer;user-select:none;display:inline-flex;align-items:center;gap:6px}
details > summary.btn::-webkit-details-marker{display:none}
details > summary.btn::marker{content:''}
#nf_preview .field label{font-weight:600}

/* ---- 操作定位高亮 ---- */
.frow:target,.file:target,.card:target,tr:target{outline:2px solid var(--brand);outline-offset:2px;background:var(--brand-soft);border-radius:var(--radius-sm)}

/* ---- 居中弹出气泡 ---- */
.flash-pop{position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:300}
.flash-box{background:#fff;border-radius:var(--radius-lg);box-shadow:0 20px 60px rgba(0,0,0,.2),0 0 0 1px rgba(0,0,0,.05);padding:32px 42px;text-align:center;min-width:300px;max-width:460px;animation:popIn .25s cubic-bezier(.34,1.56,.64,1)}
@keyframes popIn{from{opacity:0;transform:scale(.9) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}
.flash-box .flash-icon{width:52px;height:52px;border-radius:50%;background:var(--green);color:#fff;font-size:26px;line-height:52px;margin:0 auto 12px;font-weight:700}
.flash-box.error .flash-icon{background:var(--red)}
.flash-box .flash-msg{font-size:15px;white-space:pre-line;line-height:1.6}
.flash-actions{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.flash-box.confirm{text-align:left}
.flash-box.confirm .flash-msg{font-weight:700;font-size:16px}

/* ---- 材料上传反馈 ---- */
.mu-tip{font-size:12.5px;margin-top:6px;color:var(--green);font-weight:500}
.mu-tip-err{color:var(--red)}
.mu-err{outline:2px solid var(--red);border-radius:6px;animation:shake .3s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}

/* ---- 提交预检清单 ---- */
.issue-list{text-align:left;margin:10px 0 4px;padding-left:20px;max-height:240px;overflow-y:auto}
.issue-list li{margin:5px 0;color:#b91c1c;line-height:1.5}
.issue-list li::marker{content:"• "}
.issue-target{outline:2px solid var(--red);outline-offset:2px;border-radius:var(--radius-sm);transition:outline-color 1s}
#issue-panel:focus{outline:2px solid var(--brand);outline-offset:3px}

/* ---- 表单设计器 summary ---- */
details > summary.btn{list-style:none;cursor:pointer;user-select:none;display:inline-flex;align-items:center;gap:6px}
details > summary.btn::-webkit-details-marker{display:none}
details > summary.btn::marker{content:''}
#nf_preview .field label{font-weight:600}

/* ---- 后台手机绑定阻断 ---- */
.card.modal-card{max-width:560px;margin:48px auto;border:2px solid var(--orange);box-shadow:var(--shadow-lg)}
.card.modal-card h2{margin-top:0}

/* ---- 设置页选项卡按钮复位 ---- */
.tabs button.tab{background:none;font:inherit;line-height:inherit;cursor:pointer}
.tabs button.tab:hover{background:transparent;color:var(--brand)}
.tabs button.tab.active{background:transparent;color:var(--brand);border-bottom-color:var(--brand);cursor:default}

/* ---- 响应式 ---- */
@media(max-width:900px){
  .sidebar{position:static;width:auto}.admin-main{margin-left:0}
  .frow{grid-template-columns:1fr}.frow.fhead{display:none}
  .topbar .inner{padding:0 16px;gap:4px}
  .nav{gap:0}
  .nav a{padding:7px 10px;font-size:12.5px}
  .grid.c2{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
}

/* ---- 页脚 ---- */
.site-footer{background:#0f172a;color:#94a3b8;padding:24px 0;margin-top:48px}
.site-footer .inner{max-width:1200px;margin:0 auto;padding:0 24px;text-align:center}
.site-footer .copyright{font-size:13px;line-height:1.8}
.site-footer .copyright a{color:#818cf8;text-decoration:none}
.site-footer .copyright a:hover{color:#a5b4fc;text-decoration:underline}
.site-footer .footer-links{display:flex;gap:20px;justify-content:center;margin-top:8px;font-size:12.5px}
.site-footer .footer-links a{color:#64748b}
.site-footer .footer-links a:hover{color:#a5b4fc}

/* ---- 站点 Logo ---- */
.site-logo{height:38px;width:auto;max-width:180px;object-fit:contain}
.site-logo-default{width:32px;height:32px;border-radius:9px;background:var(--brand-grad);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;flex-shrink:0}

/* ---- 登录 / 注册窄卡 ---- */
.auth-card{max-width:420px;margin:32px auto;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:36px 32px}
@media(max-width:480px){.auth-card{margin:16px;padding:24px 20px}}

/* ==================== 手机适配（C 端为主，≤640px） ==================== */
@media(max-width:640px){
  /* 骨架留白 */
  .wrap{padding:0 14px}
  .main{padding-top:16px}
  h2{font-size:17px}

  /* 顶栏两行：第一行 logo+用户区，第二行导航横滑 */
  .topbar .inner{height:auto;flex-wrap:wrap;padding:10px 14px 0;row-gap:0}
  .topbar .logo{flex:1 1 auto;min-width:0}
  .topbar .logo>span:last-child{font-size:14px}
  .site-logo{height:28px;max-width:140px}
  .topbar .user-area{margin-left:0;gap:6px}
  .topbar .user-name{display:none}
  .topbar .user-area .btn{padding:6px 10px;font-size:12px}
  .nav{order:3;flex-basis:100%;margin:6px -14px 0;padding:0 8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav::-webkit-scrollbar{display:none}
  .nav a{padding:9px 12px;font-size:13px;white-space:nowrap}

  /* 卡片与留白 */
  .card{padding:16px;margin-bottom:14px}
  .card.center{padding:32px 16px}
  .card h2{margin-bottom:12px;padding-bottom:10px}
  .kpi{padding:14px}
  .kpi .v{font-size:20px}
  .grid{gap:14px}
  .grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}
  .alert{padding:12px 14px}

  /* 表单：iOS 聚焦不缩放（≥16px）+ 触控高度 */
  input[type=text],input[type=password],input[type=tel],input[type=email],input[type=number],input[type=url],input[type=search],select,textarea{font-size:16px;padding:11px 12px}
  .btn{padding:12px 18px;font-size:14.5px}
  .btn.sm{padding:8px 12px;font-size:12.5px}
  .code-row .btn{flex:0 0 auto}
  form button.btn[type=submit]{min-height:44px}

  /* 材料行 */
  .file{padding:12px;gap:10px}
  .file .thumb{width:46px;height:46px}
  .file>div:first-of-type,.file>div[style*="flex"]{min-width:0}
  .file .up-meta,.file .field-help{overflow-wrap:anywhere}

  /* 步骤条与时间线 */
  .steps{padding:6px 0;margin:4px 0;scrollbar-width:none}
  .steps::-webkit-scrollbar{display:none}
  .step{min-width:72px}
  .step .dot{width:28px;height:28px;font-size:12px;margin-bottom:6px}
  .step:not(:last-child):after{top:14px;left:calc(50% + 18px);width:calc(100% - 36px)}
  .timeline{padding-left:16px;margin-left:6px}
  .timeline .item{padding-bottom:14px}

  /* 居中弹窗：小屏不溢出 */
  .flash-box{width:calc(100vw - 40px);min-width:0;padding:24px 20px}
  .flash-box.confirm .flash-msg{font-size:15px}
  .flash-actions{flex-direction:column}
  .flash-actions .btn{width:100%}

  /* 表格横向滚动（配合 .table-wrap） */
  .table-wrap{margin-bottom:8px}
  th,td{padding:8px 10px}

  /* 长内容换行（订单号/链接等） */
  .card,.flash-msg,.alert,.kpi .v{overflow-wrap:anywhere}

  /* 页脚 */
  .site-footer{padding:20px 0;margin-top:32px}
  .site-footer .footer-links{flex-wrap:wrap;gap:10px 16px}

  /* 认证窄卡 */
  .auth-card{margin:16px 10px;padding:24px 18px}
}