/* ListKit — professional real estate tool styling */
:root {
  --navy: #0F2A43;
  --navy-2: #16385A;
  --gold: #C9A227;
  --gold-soft: #F3E7C3;
  --bg: #F6F7F9;
  --card: #FFFFFF;
  --ink: #1C2B3A;
  --muted: #5A6B80; /* 对比度 5.0:1（WCAG AA 达标，原 #64748B 仅 4.44）*/
  --border: #E2E8F0;
  --ok: #1B9E5A;
  --warn: #C0392B;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- topbar ---------- */
.topbar {
  background: var(--navy);
  color: #fff;
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 12px rgba(15,42,67,.25);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-size: 1.25rem; font-weight: 700; letter-spacing: .3px; }
.topbar nav { display: flex; gap: 18px; align-items: center; }
.topbar nav a { color: rgba(255,255,255,.85); text-decoration: none; font-size: .92rem; }
.topbar nav a:hover { color: var(--gold); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; border: 1px solid transparent; border-radius: 8px;
  padding: 10px 20px; font-size: .95rem; font-weight: 600; cursor: pointer;
  text-decoration: none; text-align: center; transition: all .15s ease;
}
.btn-primary { background: var(--gold); color: var(--navy); }
.btn-primary:hover { background: #D9B23A; transform: translateY(-1px); }
.btn-outline { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-block { display: block; width: 100%; }
.btn:disabled { opacity: .6; cursor: wait; }

/* ---------- hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff; text-align: center; padding: 72px 20px 84px;
}
.hero h1 { font-size: 2.6rem; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero .gold { color: var(--gold); }
.hero .sub { max-width: 640px; margin: 0 auto 28px; font-size: 1.12rem; color: rgba(255,255,255,.85); }
.hero .sub strong { color: var(--gold); }
.hero .fine { margin-top: 14px; font-size: .85rem; color: rgba(255,255,255,.6); }

/* ---------- sections ---------- */
section { padding: 56px 0; }
h2 { font-size: 1.7rem; margin-bottom: 8px; color: var(--navy); }
.muted { color: var(--muted); font-size: .95rem; }
.center { text-align: center; }

/* ---------- generator ---------- */
.generator h2 { text-align: center; }
.generator .muted { text-align: center; margin-bottom: 28px; }
.gen-grid {
  display: grid; grid-template-columns: 420px 1fr; gap: 24px; align-items: start;
}

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: 0 1px 4px rgba(15,42,67,.06);
}

.form-card { display: flex; flex-wrap: wrap; gap: 14px; }
.field { flex: 1 1 calc(50% - 14px); min-width: 150px; }
.field.full { flex: 1 1 100%; }
label { display: block; font-size: .82rem; font-weight: 600; color: var(--navy); margin-bottom: 4px; }
input, select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: .92rem; font-family: inherit; background: #FBFCFE; color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--gold); border-color: transparent; background: #fff;
}
textarea { resize: vertical; }

.status { font-size: .85rem; min-height: 20px; text-align: center; }
.status.err { color: var(--warn); }
.status.ok { color: var(--ok); }

/* ---------- results ---------- */
.results { min-height: 420px; }
.upgrade-card { margin-top: 18px; border: 2px solid var(--gold); background: linear-gradient(135deg, #FFFDF5, #FFF7E0); }
.upgrade-inner { text-align: center; padding: 6px 0; }
.upgrade-inner h3 { color: var(--navy); font-size: 1.25rem; margin-bottom: 6px; }
.upgrade-inner p { color: var(--ink); margin-bottom: 14px; font-size: .95rem; }
.upgrade-actions { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.upgrade-actions .btn { min-width: 220px; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; border-bottom: 2px solid var(--border); padding-bottom: 10px; margin-bottom: 16px; }
.tab-btn {
  border: 1px solid var(--border); background: var(--bg); border-radius: 20px;
  padding: 6px 14px; font-size: .82rem; font-weight: 600; color: var(--muted); cursor: pointer;
}
.tab-btn.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.doc-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.doc-head h4 { color: var(--navy); }
.copy-btn {
  border: 1px solid var(--border); background: #fff; border-radius: 6px;
  padding: 4px 12px; font-size: .8rem; cursor: pointer; color: var(--navy); font-weight: 600;
}
.copy-btn:hover { border-color: var(--gold); color: var(--gold); }
.copy-btn.done { border-color: var(--ok); color: var(--ok); }

.doc-text {
  background: #FBFCFE; border: 1px solid var(--border); border-radius: 8px;
  padding: 16px; white-space: pre-wrap; font-size: .92rem; margin-bottom: 18px; line-height: 1.65;
}
.doc-text mark {
  background: #FDE8E8; color: var(--warn); padding: 0 2px; border-radius: 3px;
}

/* compliance */
.comp-pass {
  background: #E9F8F0; border: 1px solid #BFE8D2; color: var(--ok);
  border-radius: 8px; padding: 12px 16px; font-weight: 600; margin-bottom: 14px;
}
.comp-issue {
  background: #FDF2F2; border: 1px solid #F5C6C6; border-radius: 8px;
  padding: 12px 16px; margin-bottom: 10px;
}
.comp-issue .term { font-weight: 700; color: var(--warn); }
.comp-issue .why { font-size: .88rem; margin: 4px 0; }
.comp-issue .fix { font-size: .85rem; color: var(--navy); background: #FFF9E9; padding: 4px 8px; border-radius: 6px; display: inline-block; }

/* ---------- empty state ---------- */
.empty-state { min-height: 420px; display: flex; align-items: center; justify-content: center; }
.empty-inner { text-align: center; max-width: 360px; }
.empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { color: var(--navy); margin-bottom: 8px; }
.empty-state p { color: var(--muted); font-size: .92rem; }

/* ---------- pricing ---------- */
.pricing { background: #fff; border-top: 1px solid var(--border); }
.pricing h2 { text-align: center; margin-bottom: 28px; }
.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 720px; margin: 0 auto; }
.price-card { position: relative; text-align: center; padding: 32px 24px; }
.price-card .badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gold); color: var(--navy); font-size: .72rem; font-weight: 700;
  padding: 4px 12px; border-radius: 12px; letter-spacing: .5px;
}
.price-card h3 { color: var(--navy); margin-bottom: 8px; }
.price { font-size: 2.4rem; font-weight: 800; color: var(--navy); margin-bottom: 16px; }
.price span { font-size: .95rem; font-weight: 400; color: var(--muted); }
.price-card ul { list-style: none; margin-bottom: 20px; text-align: left; }
.price-card li { padding: 6px 0; color: var(--ink); font-size: .92rem; }
.price-card li::before { content: "✓ "; color: var(--ok); font-weight: 700; }
.price-card.featured { border-color: var(--gold); box-shadow: 0 4px 20px rgba(201,162,39,.18); }

/* ---------- footer ---------- */
.footer { background: var(--navy); color: rgba(255,255,255,.7); padding: 22px 0; font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer .muted { color: rgba(255,255,255,.45); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .gen-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .price-grid { grid-template-columns: 1fr; }
  .topbar nav { gap: 12px; }
  .topbar nav a { font-size: .85rem; }
  section { padding: 44px 0; }
  .container { padding: 0 16px; }
}

@media (max-width: 640px) {
  /* 手机：导航折叠为单行滚动条 */
  .topbar-inner { flex-direction: column; height: auto; padding: 10px 0 12px; gap: 8px; }
  .topbar nav { width: 100%; justify-content: center; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
  .topbar nav a { white-space: nowrap; font-size: .82rem; }

  .hero { padding: 48px 16px 56px; }
  .hero h1 { font-size: 1.7rem; line-height: 1.25; }
  .hero .sub { font-size: 1rem; }

  /* 表单字段手机单列 */
  .field { flex: 1 1 100%; min-width: 0; }
  .btn-lg { padding: 14px 24px; font-size: 1rem; width: 100%; }
  .upgrade-actions .btn { min-width: 0; width: 100%; }

  /* 结果/合规卡 padding 收紧 */
  .card { padding: 18px; }
  .doc-text { padding: 12px; font-size: .88rem; }
  .tabs { gap: 4px; }
  .tab-btn { padding: 6px 10px; font-size: .78rem; }

  /* 定价卡 */
  .price-card { padding: 24px 18px; }
  .price { font-size: 2rem; }

  /* 页脚竖排 */
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ===== 产品力改进区块（2026-08-22）===== */
.pro-banner {
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #fff;
  text-align: center;
  padding: 12px 16px;
  font-weight: 600;
  font-size: .95rem;
}

.before-after { padding: 56px 0 64px; background: var(--bg); }
.before-after h2 { color: var(--navy); text-align: center; margin-bottom: 8px; }
.before-after > .container > .muted { text-align: center; margin-bottom: 28px; }
.ba-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 980px; margin: 0 auto; }
.ba-card h4 { margin-bottom: 12px; }
.ba-tag { display: inline-block; padding: 4px 10px; border-radius: 6px; font-size: .8rem; font-weight: 700; }
.ba-tag.bad { background: #FDF2F2; color: var(--warn); border: 1px solid #F5C6C0; }
.ba-tag.good { background: #EEF9F0; color: var(--ok); border: 1px solid #B8E0C0; }
.ba-text { font-size: .95rem; line-height: 1.65; color: var(--ink); }
.ba-text strong { color: var(--warn); }
.ba-card.ba-good .ba-text strong { color: var(--ok); }
.ba-fine { font-size: .8rem; color: var(--muted); margin-top: 12px; }

.history { margin-top: 28px; }
.history h3 { color: var(--navy); margin-bottom: 6px; }
.history ul { list-style: none; }
.history li {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; margin-bottom: 8px; cursor: pointer;
  transition: border-color .15s ease;
}
.history li:hover { border-color: var(--gold); }
.history li .h-addr { font-weight: 600; color: var(--navy); font-size: .92rem; }
.history li .h-meta { color: var(--muted); font-size: .8rem; }
.history li button { background: none; border: none; color: var(--gold); cursor: pointer; font-size: .82rem; font-weight: 600; }

@media (max-width: 640px) {
  .ba-grid { grid-template-columns: 1fr; }
}