:root {
  --ink: #1a2233;
  --gold: #c9a227;
  --gold-dark: #a8841b;
  --cream: #faf7f0;
  --white: #ffffff;
  --text: #2b3245;
  --muted: #6b7280;
  --line: #e8e2d4;
  --red: #b03a2e;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* header */
.site-header {
  background: var(--ink);
  color: #f5efdf;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px 20px;
  gap: 10px;
}
.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
}
.brand .brand-gold { color: var(--gold); }
.brand small { display: block; font-size: 12px; font-weight: 400; color: #b8b09a; letter-spacing: 2px; }
.nav { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 15px; }
.nav a { padding: 4px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a.active { color: var(--gold); border-bottom-color: var(--gold); }

/* 移动端汉堡按钮 */
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px 4px 10px 14px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--gold); margin: 5px 0; border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.site-header.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 760px) {
  .header-inner { flex-wrap: nowrap; }
  .nav-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #1b2537;
    padding: 4px 0 8px;
    box-shadow: 0 14px 26px rgba(0,0,0,.3);
  }
  .site-header.nav-open .nav { display: flex; }
  .nav a { padding: 14px 24px; border-bottom: none; border-left: 3px solid transparent; font-size: 16px; }
  .nav a:hover, .nav a.active { border-bottom-color: transparent; border-left-color: var(--gold); background: rgba(212,175,55,.08); }
}

/* hero */
.hero {
  background: linear-gradient(135deg, #1a2233 0%, #2a3448 55%, #3a4a6b 100%);
  color: #f5efdf;
  padding: 72px 0 64px;
  text-align: center;
}
.hero h1 { font-size: 34px; line-height: 1.4; letter-spacing: 1px; }
.hero h1 .hl { color: var(--gold); }
.hero p.sub { margin-top: 14px; font-size: 17px; color: #cfc7ae; max-width: 720px; margin-left: auto; margin-right: auto; }
.hero-tags { margin-top: 26px; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.hero-tags span {
  border: 1px solid rgba(201,162,39,.6);
  color: var(--gold);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 14px;
  background: rgba(201,162,39,.08);
}
.hero-cta { margin-top: 30px; }
.btn {
  display: inline-block;
  padding: 12px 34px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  transition: opacity .2s;
}
.btn-gold { background: var(--gold); color: #1a2233; }
.btn-gold:hover { opacity: .88; }
.btn-ghost { border: 1px solid #cfc7ae; color: #f5efdf; margin-left: 12px; }
.btn-ghost:hover { background: rgba(255,255,255,.08); }

/* sections */
section.block { padding: 56px 0; }
section.block.alt { background: var(--white); }
.sec-head { text-align: center; margin-bottom: 36px; }
.sec-head h2 { font-size: 28px; color: var(--ink); letter-spacing: 1px; }
.sec-head h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  background: var(--gold);
  margin: 14px auto 0;
  border-radius: 2px;
}
.sec-head p { margin-top: 12px; color: var(--muted); font-size: 15px; max-width: 680px; margin-left: auto; margin-right: auto; }

/* cards */
.grid { display: grid; gap: 20px; }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px 20px;
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 24px rgba(26,34,51,.1); }
.card .icon { font-size: 34px; margin-bottom: 12px; }
.card h3 { font-size: 18px; color: var(--ink); margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--muted); }
.card a.more { display: inline-block; margin-top: 12px; color: var(--gold-dark); font-size: 14px; font-weight: 600; }
.card a.more:hover { text-decoration: underline; }

/* steps */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px 20px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--gold);
  color: #1a2233;
  font-weight: 700;
  margin-bottom: 12px;
}
.step h3 { font-size: 17px; color: var(--ink); margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--muted); }

/* feature list */
.features li {
  list-style: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 22px;
  margin-bottom: 14px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.features .fi { font-size: 24px; }
.features h3 { font-size: 16px; color: var(--ink); margin-bottom: 4px; }
.features p { font-size: 14px; color: var(--muted); }

/* faq */
.faq details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 12px;
  padding: 16px 22px;
}
.faq summary { font-weight: 600; color: var(--ink); cursor: pointer; font-size: 16px; }
.faq details p { margin-top: 10px; color: var(--text); font-size: 15px; }

/* area tags */
.areas { display: flex; flex-wrap: wrap; gap: 10px; }
.areas span {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 15px;
}

/* contact */
.contact-box {
  background: var(--ink);
  color: #f5efdf;
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
}
.contact-box h2 { font-size: 26px; color: var(--gold); margin-bottom: 12px; }
.contact-box p { color: #cfc7ae; font-size: 16px; }
.contact-box .phone { font-size: 30px; font-weight: 700; color: #fff; margin: 16px 0 8px; letter-spacing: 2px; }
.contact-box .note { font-size: 13px; color: #9aa0b5; margin-top: 14px; }

/* breadcrumb */
.crumb { font-size: 13px; color: var(--muted); padding: 16px 0 0; }
.crumb a:hover { color: var(--gold-dark); }

/* article */
.article { background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 36px; margin-top: 24px; }
.article h2 { font-size: 22px; color: var(--ink); margin: 30px 0 12px; }
.article h2:first-child { margin-top: 0; }
.article h3 { font-size: 17px; color: var(--ink); margin: 20px 0 8px; }
.article p, .article li { font-size: 15px; color: var(--text); }
.article ul, .article ol { padding-left: 22px; margin: 8px 0; }
.article table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14px; }
.article th, .article td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.article th { background: var(--cream); color: var(--ink); }

/* admin */
.admin-tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.tab-btn {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--cream);
  color: var(--text);
  cursor: pointer;
}
.tab-btn.active { background: var(--ink); border-color: var(--ink); color: #f5efdf; font-weight: 600; }
.admin-wrap { max-width: 1000px; margin: 40px auto; padding: 0 20px; }
.admin-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 30px;
}
.admin-card h1 { font-size: 22px; color: var(--ink); margin-bottom: 6px; }
.admin-card .sub { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.admin-row { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.admin-row input {
  flex: 1;
  min-width: 180px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 15px;
  background: var(--cream);
}
.admin-row button { flex-shrink: 0; }
.btn-small {
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
}
.btn-small:hover { border-color: var(--gold); color: var(--gold-dark); }
.btn-small.primary { background: var(--gold); border-color: var(--gold); color: #1a2233; font-weight: 600; }
.admin-msg { font-size: 14px; margin: 8px 0; min-height: 20px; }
.admin-msg.ok { color: #1e7e34; }
.admin-msg.err { color: var(--red); }
.remember-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.remember-row input { width: 15px; height: 15px; accent-color: var(--gold); }
.leads-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.leads-table th, .leads-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}
.leads-table th { background: var(--cream); color: var(--ink); }
.leads-table td .lead-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.badge.new { background: #fff3cd; color: #8a6d00; }
.badge.done { background: #d9f2df; color: #1e7e34; }
.admin-empty { color: var(--muted); text-align: center; padding: 30px 0; }
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .leads-table { font-size: 13px; }
}

/* footer */
.site-footer { background: #131a29; color: #8b93a8; padding: 36px 0 28px; margin-top: 56px; font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; }
.site-footer h4 { color: #f5efdf; font-size: 16px; margin-bottom: 10px; }
.site-footer a:hover { color: var(--gold); }
.copyright { text-align: center; margin-top: 24px; border-top: 1px solid #2a3448; padding-top: 18px; font-size: 13px; }

@media (max-width: 900px) {
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .steps { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 26px; }
}
@media (max-width: 560px) {
  .grid-5, .grid-3, .grid-2, .steps { grid-template-columns: 1fr; }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
  .article { padding: 24px 18px; }
}