:root{
  --bg:#f4f7fb;
  --card:#ffffff;
  --text:#172033;
  --muted:#7b8798;
  --line:#e6ebf2;
  --blue:#2563eb;
  --blue2:#1d4ed8;
  --navy:#0f172a;
  --amber:#f59e0b;
  --green:#16a34a;
  --red:#dc2626;
  --shadow:0 18px 45px rgba(15,23,42,.08);
  --radius:24px;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg)}
a{text-decoration:none;color:inherit}
button,input,textarea,select{font:inherit}
input,textarea,select{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px 14px;outline:none;color:var(--text)}
textarea{resize:vertical}input:focus,textarea:focus,select:focus{border-color:#93b4ff;box-shadow:0 0 0 4px rgba(37,99,235,.08)}
label{display:block;font-size:14px;color:#334155;font-weight:650;line-height:1.4}label input,label textarea,label select{margin-top:8px}.muted{color:var(--muted)}.small{font-size:13px}.grid{display:grid;gap:16px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;color:#26364d;border-radius:14px;padding:11px 16px;min-height:42px;cursor:pointer;font-weight:750;transition:.2s;white-space:nowrap}.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(15,23,42,.07)}.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.btn.primary:hover{background:var(--blue2)}.btn.danger{background:var(--red);border-color:var(--red);color:#fff}.btn.danger-soft{background:#fff1f2;border-color:#fecdd3;color:#be123c}.btn.small{padding:7px 11px;border-radius:10px;min-height:32px;font-size:13px}.btn.large{min-height:58px;font-size:16px}.btn.full{width:100%}.notice,.flash{padding:14px 16px;border-radius:16px;margin:16px 0;font-weight:650}.notice.success,.flash.success{background:#ecfdf5;color:#047857;border:1px solid #bbf7d0}.notice.danger,.flash.danger{background:#fff1f2;color:#be123c;border:1px solid #fecdd3}.flash{margin-bottom:22px}.tag{display:inline-flex;align-items:center;border-radius:999px;padding:7px 11px;font-size:12px;font-weight:800}.tag.amber{background:#fffbeb;color:#b45309;border:1px solid #fde68a}.tag.blue{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe}.tag.slate{background:#f1f5f9;color:#475569;border:1px solid #e2e8f0}.card{background:var(--card);border:1px solid rgba(226,232,240,.9);border-radius:var(--radius);box-shadow:var(--shadow)}

/* installer / login */
.install-body,.login-body{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:30px;background:linear-gradient(135deg,#eff6ff 0%,#f8fafc 55%,#eef2ff 100%)}.install-card,.login-card{width:100%;max-width:760px;background:#fff;border-radius:30px;padding:34px;box-shadow:0 28px 70px rgba(15,23,42,.13);border:1px solid rgba(226,232,240,.9)}.login-card{max-width:430px}.install-card h1,.login-card h1{margin:14px 0 8px;font-size:30px}.install-card h2{font-size:18px;margin:26px 0 14px}.install-form{margin-top:20px}.install-actions{display:flex;gap:12px;margin:24px 0}.brand-logo{width:46px;height:46px;border-radius:16px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;box-shadow:0 12px 26px rgba(37,99,235,.24)}.brand-logo.big{width:64px;height:64px;border-radius:22px;font-size:26px}.check-row{display:flex!important;align-items:center;gap:10px;color:#475569}.check-row input{width:auto;margin:0}.login-card form{display:grid;gap:16px;margin-top:20px}

/* public page */
.public-body{background:#f4f7fb}.public-header{background:#0f2c59;color:#fff;position:sticky;top:0;z-index:20;box-shadow:0 8px 22px rgba(15,23,42,.12)}.public-header-inner{max-width:1220px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:18px}.public-brand{display:flex;align-items:center;gap:14px}.brand-title{font-size:19px;font-weight:900}.brand-subtitle{font-size:12px;color:rgba(255,255,255,.66);margin-top:3px}.public-status{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:9px 14px;border-radius:999px;font-size:13px;font-weight:800}.public-container{max-width:1220px;margin:0 auto;padding:28px 24px 46px}.hero-card{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;background:linear-gradient(135deg,#2563eb,#1e3a8a);border-radius:32px;color:#fff;padding:34px;box-shadow:0 30px 70px rgba(30,64,175,.22)}.eyebrow{display:inline-flex;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.13);font-size:13px;color:#dbeafe;font-weight:800}.hero-copy h1{font-size:38px;line-height:1.2;margin:18px 0 14px;letter-spacing:-.02em}.hero-copy p{color:#dbeafe;line-height:1.9;margin:0;max-width:760px}.hero-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.hero-meta span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);padding:8px 12px;border-radius:14px;font-size:13px}.countdown-panel{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:28px;padding:24px;backdrop-filter:blur(8px);align-self:stretch;display:flex;flex-direction:column;justify-content:center}.countdown-title{color:#dbeafe;font-weight:800;margin-bottom:14px}.countdown-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.countdown-grid div{background:rgba(255,255,255,.15);border-radius:20px;text-align:center;padding:18px 8px}.countdown-grid strong{display:block;font-size:38px;line-height:1;font-variant-numeric:tabular-nums}.countdown-grid span{display:block;margin-top:8px;color:#dbeafe;font-size:13px}.countdown-note{margin-top:14px;color:#dbeafe;font-size:13px;text-align:center}.public-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px;margin-top:24px}.public-main,.public-side{display:grid;gap:22px}.v1-card,.side-card{padding:26px}.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:20px}.section-head h2,.side-card h3,.admin-card h2{margin:0;font-size:22px}.section-head p{margin:6px 0 0;color:var(--muted);font-size:14px}.summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.summary-grid div{background:#f8fafc;border:1px solid #eef2f7;border-radius:18px;padding:16px}.summary-grid span{display:block;color:#7b8798;font-size:13px;margin-bottom:8px}.summary-grid strong{font-size:17px}.note-box,.warning-box{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:18px;padding:16px;margin-top:18px;line-height:1.7}.file-grid{display:grid;gap:14px}.file-card{display:grid;grid-template-columns:56px minmax(0,1fr) auto;align-items:center;gap:14px;background:#f8fafc;border:1px solid #eef2f7;border-radius:20px;padding:16px}.file-icon{height:50px;width:50px;border-radius:16px;background:#eff6ff;color:#1d4ed8;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:900}.file-info{min-width:0}.file-info strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-info span,.contact-row span,.file-info p{display:block;color:var(--muted);font-size:13px;margin:5px 0 0}.file-actions{display:flex;gap:8px}.empty-box{padding:20px;border:1px dashed #cbd5e1;border-radius:18px;color:#64748b;background:#f8fafc;text-align:center}.contact-list{display:grid;gap:12px}.contact-row{display:grid;grid-template-columns:48px 1fr auto;gap:14px;align-items:center;background:#f8fafc;border:1px solid #eef2f7;border-radius:20px;padding:15px}.avatar{width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#e0edff;color:#1d4ed8;font-weight:900}.contact-row em{display:block;color:#94a3b8;font-style:normal;font-size:12px;margin-top:3px}.contact-row b{font-size:12px;color:#047857;background:#ecfdf5;border-radius:999px;padding:6px 9px}.action-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.advice-list{margin:0;padding-left:20px;color:#475569;line-height:1.9}.timeline{display:grid;gap:15px}.timeline div{position:relative;padding-left:24px}.timeline div span{position:absolute;left:0;top:4px;width:11px;height:11px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #eff6ff}.timeline strong{display:block;font-size:14px}.timeline em{display:block;font-style:normal;color:var(--muted);font-size:12px;margin-top:4px}.timeline p{margin:6px 0 0;color:#64748b;font-size:13px;line-height:1.6}.dark-card{background:#0f172a;color:#fff}.dark-card p{color:#cbd5e1;line-height:1.8}.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;z-index:100;padding:24px}.modal-backdrop.open{display:flex}.modal-card{width:100%;max-width:520px;background:#fff;border-radius:28px;padding:28px;box-shadow:0 30px 80px rgba(15,23,42,.28);position:relative}.modal-card h3{font-size:25px;margin:0 0 8px}.modal-card p{color:#64748b;line-height:1.7}.modal-close{position:absolute;right:18px;top:18px;border:0;background:#f1f5f9;border-radius:50%;width:36px;height:36px;font-size:24px;cursor:pointer;color:#334155}.modal-card form{display:grid;gap:14px;margin-top:18px}.instruction-text{background:#f8fafc;border:1px solid #e2e8f0;border-radius:18px;padding:16px;margin:16px 0}.instruction-text p{margin:7px 0}.toast{position:fixed;left:50%;top:24px;transform:translateX(-50%) translateY(-20px);background:#111827;color:white;padding:12px 18px;border-radius:14px;opacity:0;pointer-events:none;z-index:200;transition:.25s;box-shadow:0 16px 40px rgba(0,0,0,.18)}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.empty-public{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px}.empty-public h1{font-size:34px;margin:20px 0 10px}.empty-public p{color:var(--muted);margin-bottom:22px}

/* admin */
.admin-body{background:#eef3f9}.admin-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.admin-sidebar{background:#0f172a;color:white;padding:22px;display:flex;flex-direction:column;gap:24px;position:sticky;top:0;height:100vh}.brand-block{display:flex;gap:12px;align-items:center}.admin-sidebar .brand-subtitle{color:#94a3b8}.admin-nav{display:grid;gap:8px}.admin-nav a{display:block;padding:13px 14px;border-radius:14px;color:#cbd5e1;font-weight:800}.admin-nav a:hover,.admin-nav a.active{background:#1d4ed8;color:#fff}.sidebar-tip{margin-top:auto;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:15px;display:grid;gap:7px}.sidebar-tip span{color:#cbd5e1;font-size:12px;line-height:1.7}.admin-main{padding:26px;min-width:0}.admin-topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px}.admin-topbar h1{margin:0;font-size:30px}.admin-topbar p{margin:7px 0 0;color:#64748b}.admin-pill{background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:999px;font-weight:800}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}.stat-card,.toolbar-card,.table-card,.form-card,.case-title-card,.admin-card{background:#fff;border-radius:24px;border:1px solid rgba(226,232,240,.85);box-shadow:var(--shadow)}.stat-card{padding:20px}.stat-card span{display:block;color:#64748b;font-size:13px}.stat-card strong{display:block;font-size:32px;margin-top:8px}.toolbar-card{padding:16px;display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}.search-form{display:flex;gap:10px;flex:1}.table-card{overflow:auto}.data-table{width:100%;border-collapse:collapse;background:#fff}.data-table th,.data-table td{text-align:left;border-bottom:1px solid #eef2f7;padding:15px 16px;font-size:14px}.data-table th{color:#64748b;background:#f8fafc;font-size:12px;text-transform:uppercase;letter-spacing:.03em}.table-empty{text-align:center!important;color:#64748b;padding:34px!important}.form-card{padding:26px}.form-section-title{font-size:18px;font-weight:900;margin:18px 0 14px}.form-actions{display:flex;gap:12px;margin-top:20px}.form-actions.wrap{flex-wrap:wrap}.inline-form{display:inline-flex;align-items:center;gap:8px}.inline-form select{width:160px}.small-input{width:70px!important}.danger-zone{margin-top:30px;padding-top:22px;border-top:1px dashed #fecdd3}.case-title-card{padding:24px;margin-bottom:22px;display:grid;grid-template-columns:1fr 260px;gap:20px;align-items:start}.case-title-card h2{font-size:25px;margin:0 0 7px}.case-title-card p{color:#64748b;margin:0 0 14px}.link-copy-row{display:flex;gap:10px}.link-copy-row input{font-size:13px}.case-meta-box{background:#eff6ff;border:1px solid #bfdbfe;border-radius:20px;padding:20px}.case-meta-box span{display:block;color:#1d4ed8;font-size:13px;font-weight:800}.case-meta-box strong{display:block;font-size:24px;margin:7px 0;color:#1e3a8a}.case-meta-box em{display:block;font-style:normal;color:#64748b;font-size:13px}.admin-two-col{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:22px}.admin-left-col,.admin-right-col{display:grid;gap:22px}.admin-card{padding:22px}.admin-summary{grid-template-columns:repeat(3,minmax(0,1fr))}.upload-form{display:grid;grid-template-columns:1.1fr 1fr auto auto;gap:10px;align-items:center}.compact-form{margin-bottom:18px}.mini-list{display:grid;gap:10px;margin-top:16px}.mini-row{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#f8fafc;border:1px solid #eef2f7;border-radius:16px;padding:13px}.mini-row.no-action{justify-content:flex-start}.mini-row strong{display:block}.mini-row span{display:block;color:#64748b;font-size:12px;margin-top:4px}.request-card{background:#f8fafc;border:1px solid #eef2f7;border-radius:18px;padding:14px}.request-head{display:flex;justify-content:space-between;gap:8px}.request-head span{font-size:12px;color:#1d4ed8;background:#eff6ff;border-radius:999px;padding:5px 9px}.request-card p{font-size:13px;color:#475569;line-height:1.7;margin:10px 0}.request-card em{display:block;font-style:normal;color:#94a3b8;font-size:12px;margin-bottom:10px}.admin-timeline{max-height:420px;overflow:auto;padding-right:6px}

@media (max-width: 1050px){.hero-card,.public-grid,.admin-two-col,.case-title-card{grid-template-columns:1fr}.summary-grid,.admin-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:relative;height:auto}.admin-nav{grid-template-columns:repeat(3,1fr)}.upload-form{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width: 680px){.grid.two,.summary-grid,.admin-summary,.stats-grid,.action-grid{grid-template-columns:1fr}.public-header-inner,.toolbar-card,.admin-topbar,.link-copy-row,.form-actions,.install-actions{flex-direction:column;align-items:stretch}.hero-card{padding:24px;border-radius:24px}.hero-copy h1{font-size:28px}.countdown-grid strong{font-size:28px}.public-container{padding:20px 14px 34px}.file-card{grid-template-columns:1fr}.file-actions{justify-content:flex-start}.contact-row{grid-template-columns:1fr}.admin-main{padding:16px}.admin-nav{grid-template-columns:1fr}.install-card,.login-card{padding:24px}.data-table{min-width:760px}}

/* V3：单按钮处理入口与附件权限控制 */
.action-grid.single-action {
  grid-template-columns: 1fr;
}
.action-grid.single-action .btn {
  min-height: 68px;
  font-size: 16px;
}
.attachment-admin-row {
  align-items: flex-start;
  gap: 14px;
}
.stacked-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}
.inline-permission-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  align-items: center;
}
.inline-permission-form label {
  font-size: 12px;
  color: #64748b;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.request-decision-form {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}
.request-decision-form textarea {
  width: 100%;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 10px;
  resize: vertical;
}
.compact-note {
  margin-top: 10px;
  font-size: 13px;
}
@media (max-width: 760px) {
  .stacked-actions,
  .inline-permission-form {
    align-items: flex-start;
    justify-content: flex-start;
  }
}


/* V4：图片附件缩略图。只有图片类型且后台允许预览时，前端才会显示缩略图。 */
.file-thumb{height:50px;width:50px;border-radius:16px;overflow:hidden;display:block;background:#eff6ff;border:1px solid #dbeafe;box-sizing:border-box}
.file-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.file-thumb:hover{box-shadow:0 8px 20px rgba(37,99,235,.18)}