/* ========== 全局重置 & 变量 ========== */
:root {
  --primary: #b8860b;
  --primary-dark: #8b6508;
  --text: #333;
  --text-light: #666;
  --bg: #fff;
  --bg-section: #f8f6f3;
  --border: #e0dcd5;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* ========== 导航栏 ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
}

.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 0.95rem;
  color: var(--text);
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover,
.nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* ========== Hero 区域 ========== */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #fff;
  text-align: center;
  padding: 100px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.03)" d="M0,160L48,176C96,192,192,224,288,213.3C384,203,480,149,576,138.7C672,128,768,160,864,181.3C960,203,1056,213,1152,197.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"/></svg>') no-repeat bottom;
  background-size: cover;
}
.hero h1 { font-size: 2.8rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 2px; position: relative; }
.hero p { font-size: 1.15rem; opacity: 0.85; max-width: 600px; margin: 0 auto 32px; position: relative; }
.hero .btn {
  display: inline-block;
  padding: 14px 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.3s, transform 0.2s;
  position: relative;
}
.hero .btn:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ========== 通用容器 & 标题 ========== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

.section { padding: 80px 0; }
.section-gray { background: var(--bg-section); }

.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.section-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 48px;
  font-size: 1rem;
}

/* ========== 卡片网格 ========== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ========== 服务卡片 ========== */
.service-card {
  background: #fff;
  padding: 40px 28px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.service-card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--bg-section);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}
.service-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.service-card p { font-size: 0.9rem; color: var(--text-light); }

/* ========== 房源卡片 ========== */
.property-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.property-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.property-card .img-wrap {
  position: relative;
  height: 220px;
  background: #e8e5df;
  overflow: hidden;
}
.property-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.property-card .tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
}
.property-card .info { padding: 20px; }
.property-card .info h3 { font-size: 1.1rem; margin-bottom: 8px; }
.property-card .info .meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 12px;
}
.property-card .info .price {
  font-size: 1.25rem;
  font-weight: 700;
  color: #c0392b;
}
.property-card .info .price span { font-size: 0.9rem; font-weight: 400; }

/* ========== 优势数字区 ========== */
.stats {
  display: flex;
  justify-content: center;
  gap: 80px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-item .num {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary);
}
.stat-item .label { color: var(--text-light); font-size: 0.95rem; margin-top: 4px; }

/* ========== CTA 区域 ========== */
.cta {
  text-align: center;
  padding: 80px 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
}
.cta h2 { font-size: 2rem; margin-bottom: 12px; }
.cta p { opacity: 0.9; margin-bottom: 28px; }
.cta .btn-white {
  display: inline-block;
  padding: 14px 40px;
  background: #fff;
  color: var(--primary);
  border-radius: 50px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta .btn-white:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.2); }

/* ========== 页脚 ========== */
.footer {
  background: #1a1a2e;
  color: rgba(255,255,255,0.7);
  padding: 60px 24px 24px;
}
.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}
.footer h3 { color: #fff; font-size: 1.1rem; margin-bottom: 16px; }
.footer p, .footer a { font-size: 0.9rem; line-height: 2; }
.footer a:hover { color: var(--primary); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.85rem;
}

/* ========== 页面 Banner ========== */
.page-banner {
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  color: #fff;
  text-align: center;
  padding: 60px 24px;
}
.page-banner h1 { font-size: 2.2rem; font-weight: 700; }
.page-banner .breadcrumb { margin-top: 8px; font-size: 0.9rem; opacity: 0.8; }
.page-banner .breadcrumb a { color: var(--primary); }
.page-banner .breadcrumb a:hover { text-decoration: underline; }

/* ========== 房源筛选栏 ========== */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.filter-bar button {
  padding: 8px 24px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 50px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.filter-bar button:hover,
.filter-bar button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== 房源详情页 ========== */
.detail-gallery {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
  margin-bottom: 40px;
}
.detail-gallery .main-img {
  height: 420px;
  background: #e8e5df;
  border-radius: var(--radius);
  overflow: hidden;
}
.detail-gallery .main-img img { width: 100%; height: 100%; object-fit: cover; }
.detail-gallery .side-imgs {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
}
.detail-gallery .side-imgs div {
  background: #e8e5df;
  border-radius: var(--radius);
  overflow: hidden;
}
.detail-gallery .side-imgs img { width: 100%; height: 100%; object-fit: cover; }

.detail-body { display: grid; grid-template-columns: 2fr 1fr; gap: 40px; }
.detail-main h2 { font-size: 1.5rem; margin-bottom: 16px; }
.detail-main .price-big { font-size: 2rem; color: #c0392b; font-weight: 700; margin-bottom: 20px; }
.detail-main .specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 20px;
  background: var(--bg-section);
  border-radius: var(--radius);
  margin-bottom: 28px;
}
.detail-main .specs .spec-label { font-size: 0.8rem; color: var(--text-light); }
.detail-main .specs .spec-value { font-size: 1.05rem; font-weight: 600; }
.detail-main .desc { line-height: 1.9; color: var(--text); }

.detail-sidebar .sidebar-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 88px;
}
.detail-sidebar .sidebar-card h4 { font-size: 1.1rem; margin-bottom: 16px; }
.detail-sidebar .sidebar-card .agent-info { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
.detail-sidebar .sidebar-card .agent-avatar {
  width: 48px; height: 48px; border-radius: 50%; background: #e8e5df;
}
.detail-sidebar .sidebar-card .btn-contact {
  display: block;
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  cursor: pointer;
  text-align: center;
  transition: background 0.2s;
}
.detail-sidebar .sidebar-card .btn-contact:hover { background: var(--primary-dark); }

/* ========== 联系页面 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2 { font-size: 1.8rem; margin-bottom: 12px; }
.contact-info .info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-top: 28px;
}
.contact-info .info-item .info-icon {
  width: 48px; height: 48px;
  background: var(--bg-section);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.contact-info .info-item h4 { font-size: 1rem; margin-bottom: 4px; }
.contact-info .info-item p { color: var(--text-light); font-size: 0.9rem; }

.contact-form {
  background: #fff;
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-form h3 { font-size: 1.3rem; margin-bottom: 24px; }
.contact-form .form-group { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 0.9rem; margin-bottom: 6px; color: var(--text); }
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus { outline: none; border-color: var(--primary); }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.contact-form .btn-submit:hover { background: var(--primary-dark); }

/* ========== 关于页 ========== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-intro .img-placeholder {
  height: 380px;
  background: #e8e5df;
  border-radius: var(--radius);
  overflow: hidden;
}
.about-intro h2 { font-size: 1.8rem; margin-bottom: 16px; }
.about-intro p { color: var(--text-light); margin-bottom: 12px; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card { text-align: center; }
.team-card .avatar {
  width: 100px; height: 100px;
  border-radius: 50%;
  background: #e8e5df;
  margin: 0 auto 16px;
}
.team-card h4 { font-size: 1rem; margin-bottom: 4px; }
.team-card p { font-size: 0.85rem; color: var(--text-light); }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; }

  .detail-gallery { grid-template-columns: 1fr; }
  .detail-gallery .main-img { height: 260px; }
  .detail-gallery .side-imgs { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .detail-gallery .side-imgs div { height: 140px; }
  .detail-body { grid-template-columns: 1fr; }
  .detail-main .specs { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
}