/* ============================================================
   AI-OPC 商业模式智能体 · 前端样式
   原则：只消费 assets/tokens.css 的变量，不硬编码色值（PRD 2.5.1）
   断点：<1024px 不提供表单（手机端等同无此功能，PRD 2.5.2 / FR-25）
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--slate-0, #fff);
  color: var(--navy-900);
  font-family: var(--font-sans, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -.01em; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
.hide { display: none !important; }
.muted { color: var(--slate-500); }
.gold { color: var(--gold-600); }

/* ---------------- 站点导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, .06);
}
.nav-inner {
  max-width: 1480px; margin: 0 auto; padding: 12px 32px;
  display: flex; align-items: center; gap: 18px;
}
.nav .brand { display: inline-flex; align-items: center; gap: 12px; }
.nav .brand img { width: 42px; height: 42px; border-radius: 10px; }
.nav .brand .nm { font-weight: 800; font-size: 15px; }
.nav .brand .sub { font-size: 11px; color: var(--slate-500); }
.nav .links { display: flex; gap: 24px; font-size: 13px; color: var(--slate-500); margin-left: 24px; }
.nav .links a:hover { color: var(--navy-900); }
.nav .links a.cur {
  color: var(--gold-700); font-weight: 700; position: relative;
}
.nav .links a.cur::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -7px;
  height: 2px; background: var(--gold-500); border-radius: 2px;
}
.nav .spacer { flex: 1; }
.nav .who { font-size: 12.5px; color: var(--slate-500); }
.nav .who b { color: var(--navy-900); }

/* ---------------- 容器 ---------------- */
.wrap { max-width: 1480px; margin: 0 auto; padding: 26px 32px 60px; }
.wrap-narrow { max-width: 880px; }
.page-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; }
.page-head h1 { font-size: 22px; }
.page-head .note { font-size: 12.5px; color: var(--slate-500); }

/* ---------------- 卡片 / 按钮 ---------------- */
.card {
  background: #fff; border: 1px solid var(--slate-200);
  border-radius: 16px; box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
  padding: 20px 22px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: 8px; border: 1px solid transparent;
  font-size: 13px; font-weight: 600; cursor: pointer; transition: .18s;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: linear-gradient(135deg, var(--gold-500), var(--gold-600)); color: var(--navy-900); }
.btn-primary:hover:not(:disabled) { filter: brightness(1.04); }
.btn-secondary { background: #fff; border-color: var(--slate-300, #CBD5E1); color: var(--navy-900); }
.btn-secondary:hover:not(:disabled) { border-color: var(--navy-400); }
.btn-ghost { background: transparent; color: var(--slate-600, #475569); }
.btn-ghost:hover:not(:disabled) { color: var(--navy-900); background: var(--slate-100); }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ---------------- 表单：左侧步骤条 + 右侧题区 ---------------- */
.form-layout { display: flex; gap: 32px; align-items: flex-start; }
.fsteps {
  flex: 0 0 236px; position: sticky; top: 86px;
  background: #fff; border: 1px solid var(--slate-200); border-radius: 16px; padding: 18px 16px;
}
.fsteps .it {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 9px 10px; border-radius: 10px; font-size: 13px; color: var(--slate-500);
  cursor: pointer; margin-bottom: 2px;
}
.fsteps .it:hover { background: var(--slate-100); }
.fsteps .it.on { background: var(--gold-50, #FBF6EA); color: var(--navy-900); font-weight: 700; }
.fsteps .it.done { color: var(--navy-700); }
.fsteps .no {
  flex: 0 0 20px; height: 20px; border-radius: 50%;
  background: var(--slate-200); color: var(--slate-600, #475569);
  font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.fsteps .it.on .no { background: var(--gold-500); color: var(--navy-900); }
.fsteps .it.done .no { background: var(--navy-900); color: #fff; }
.fsteps .tip { font-size: 11px; color: var(--slate-400, #94A3B8); font-weight: 400; margin-top: 2px; }

.fbody { flex: 1; min-width: 0; }
.fgroup-title {
  font-size: 15px; font-weight: 700; margin: 4px 0 12px;
  display: flex; align-items: baseline; gap: 10px;
}
.fgroup-title span { font-size: 12px; color: var(--slate-500); font-weight: 400; }

.fq {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 14px;
  padding: 18px 20px; margin-bottom: 14px;
}
.fq.miss { border-color: var(--error-500, #E24B4A); background: var(--error-50, #FCEBEB); }
.fq h4 { font-size: 14px; margin-bottom: 4px; }
.fq h4 .req { color: var(--error-600, #A32D2D); }
.fq .qsub { font-size: 12px; color: var(--slate-500); margin-bottom: 12px; }
.dirs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.dir label { display: block; font-size: 12px; color: var(--slate-600, #475569); margin-bottom: 5px; }
.dir .row { display: flex; align-items: center; gap: 6px; }
.dir input {
  width: 100%; padding: 9px 11px; border: 1px solid var(--slate-200);
  border-radius: 8px; background: #fff; outline: none;
}
.dir input:focus { border-color: var(--gold-500); box-shadow: 0 0 0 3px rgba(201, 162, 75, .18); }
.dir .unit { flex: 0 0 auto; font-size: 12px; color: var(--slate-500); min-width: 34px; }
.fq .ex { font-size: 12px; color: var(--slate-500); margin-top: 10px; }
.fq .foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--slate-200);
  font-size: 12px; color: var(--slate-500);
}
.chk { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

.actbar {
  position: sticky; bottom: 0; z-index: 20;
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; padding: 14px 18px; margin-top: 18px;
  background: rgba(255, 255, 255, .94); border: 1px solid var(--slate-200);
  border-radius: 14px; -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
.actbar .err { color: var(--error-600, #A32D2D); font-size: 12.5px; }

/* ---------------- 表格 ---------------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th {
  text-align: left; font-size: 11.5px; font-weight: 700; color: var(--slate-500);
  padding: 8px 10px; border-bottom: 1px solid var(--slate-200); white-space: nowrap;
}
.tbl td { padding: 12px 10px; border-bottom: 1px solid var(--slate-100); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl .sub { font-size: 11px; color: var(--slate-500); margin-top: 2px; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.tag-success { background: var(--success-50, #EAF3DE); color: var(--success-700, #3B6D11); }
.tag-warn { background: var(--warning-50, #FAEEDA); color: var(--warning-700, #854F0B); }
.tag-error { background: var(--error-50, #FCEBEB); color: var(--error-700, #A32D2D); }
.tag-slate { background: var(--slate-100); color: var(--slate-600, #475569); }
.tag-gold { background: var(--gold-50, #FBF6EA); color: var(--gold-700, #8A6A25); }

/* ---------------- 无权限 / 空状态 ---------------- */
.noperm {
  max-width: 560px; margin: 90px auto; text-align: center;
  background: #fff; border: 1px solid var(--slate-200); border-radius: 18px; padding: 44px 40px;
}
.noperm .ico {
  width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 50%;
  background: var(--gold-50, #FBF6EA); color: var(--gold-600);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.noperm h2 { font-size: 19px; margin-bottom: 10px; }
.noperm p { font-size: 13px; color: var(--slate-600, #475569); line-height: 1.85; margin: 0 0 22px; }
.noperm .acts { display: flex; gap: 12px; justify-content: center; }
.empty { text-align: center; padding: 60px 20px; color: var(--slate-500); font-size: 13px; }

/* ---------------- 进度 ---------------- */
.prog-box { max-width: 620px; margin: 80px auto; }
.prog-bar { height: 8px; background: var(--slate-100); border-radius: 999px; overflow: hidden; margin: 22px 0 12px; }
.prog-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold-500), var(--gold-600)); transition: width .5s; }
.prog-step { font-size: 12.5px; color: var(--slate-500); display: flex; justify-content: space-between; }

/* ---------------- toast ---------------- */
#toast {
  position: fixed; left: 50%; bottom: 42px; transform: translateX(-50%);
  background: var(--navy-900); color: #fff; padding: 11px 20px; border-radius: 10px;
  font-size: 13px; z-index: 999; opacity: 0; pointer-events: none; transition: .25s;
  max-width: 80vw;
}
#toast.on { opacity: 1; }

/* ---------------- 断点：≥1280 三列 / 1024-1239 两列 ---------------- */
@media (max-width: 1279px) {
  .dirs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wrap { padding: 22px 24px 50px; }
}
@media (max-width: 1023px) {
  .form-layout { flex-direction: column; }
  .fsteps { position: static; flex: none; width: 100%; }
  .dirs { grid-template-columns: 1fr; }
}

/* ---------- 版本对比（FR-29） ---------- */
.dhint { font-size:12px; color:var(--slate-500); margin-bottom:10px; }
.dgroup { margin-top:14px; }
.dgroup h4 { font-size:13px; font-weight:700; color:var(--navy-900); margin:0 0 6px; }
.dtbl { width:100%; border-collapse:collapse; table-layout:fixed; }
.dtbl tr:first-child td { border-top:1px solid var(--slate-100); }
.dtbl td { font-size:12px; line-height:1.7; padding:7px 10px;
           border-bottom:1px solid var(--slate-100); vertical-align:top; }
.dtbl .dl { width:15%; color:var(--slate-500); font-weight:600; }
.dtbl .da { width:42.5%; color:var(--slate-500); background:#FAFAFB; }
.dtbl .db { width:42.5%; color:var(--navy-900); border-left:2px solid var(--gold-500); }

/* ---------- 版本表：按钮与状态不换行 ---------- */
.vtb { table-layout:fixed; }
.vtb .tag { white-space:nowrap; }
.vtb td.ops { white-space:nowrap; }
.vtb td { vertical-align:middle; }
.vtb td:nth-child(3) { white-space:nowrap; }
.vtb td.ops .btn { margin-left:4px; }
.vtb td:last-child { padding-right:2px; }

/* ---------- 九要素单项重做（FR-27） ---------- */
.elrow { display:flex; align-items:center; gap:12px; padding:10px 2px;
         border-bottom:1px solid var(--slate-100); }
.elrow:last-child { border-bottom:0; }
.elrow .eno { flex:0 0 30px; font-size:11px; font-weight:700; color:var(--gold-600);
              letter-spacing:.5px; }
.elrow .ebody { flex:1; min-width:0; }
.elrow .enm { font-size:13.5px; font-weight:700; color:var(--navy-900); }
.elrow .epb { font-size:12px; color:var(--slate-500); margin-top:3px; line-height:1.55;
              overflow:hidden; display:-webkit-box; -webkit-line-clamp:2;
              -webkit-box-orient:vertical; }
.elrow .btn { flex:0 0 auto; }