/* 拉萨迎昭旅行社 - 全新设计 */
/* 藏式经典 × 现代简约融合风格 */

:root {
  --tibetan-red: #B22222;
  --tibetan-red-dark: #8B1A1A;
  --tibetan-gold: #D4A017;
  --tibetan-gold-light: #E8C55A;
  --deep-blue: #2C3E50;
  --snow-white: #FAFAFA;
  --pure-white: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #5F6B7A;
  --text-muted: #9CA3AF;
  --border-light: #E5E7EB;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(178, 34, 34, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 100px;
  --container: 1200px;
  --nav-height: 76px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  background: var(--snow-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color:inherit; text-decoration:none; transition: var(--transition); }
img { max-width:100%; vertical-align:middle; }
ul { list-style:none; }

.container { max-width:var(--container); margin:0 auto; padding:0 20px; }

/* ============ TOP BAR ============ */
.top-bar {
  background: var(--deep-blue);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 8px 0;
  line-height: 1;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar a { color: rgba(255,255,255,0.85); }
.top-bar a:hover { color: var(--tibetan-gold); }
.top-bar-left span { margin-right: 24px; }
.top-bar-left i { margin-right: 6px; }
.top-bar-right { display: flex; gap: 16px; align-items: center; }

/* ============ HEADER / NAV ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--pure-white);
  border-bottom: 1px solid var(--border-light);
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo img { height: 42px; width: auto; }
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--tibetan-red);
  letter-spacing: 2px;
}
.logo-text span { color: var(--deep-blue); }

.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu > li > a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition);
}
.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: var(--tibetan-red);
  background: rgba(178,34,34,0.06);
}
.nav-menu > li > a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--tibetan-red);
  border-radius: 2px;
}

.nav-cta {
  display: inline-block;
  background: var(--tibetan-red);
  color: var(--pure-white) !important;
  padding: 10px 28px !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
  font-size: 14px !important;
  letter-spacing: 1px;
}
.nav-cta:hover {
  background: var(--tibetan-red-dark) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(178,34,34,0.3);
}

/* Mobile nav toggle */
.nav-toggle { display: none; flex-direction:column; cursor:pointer; gap:5px; padding:8px; }
.nav-toggle span { display:block; width:24px; height:2px; background:var(--text-primary); border-radius:2px; transition:var(--transition); }

/* ============ HERO ============ */
.hero {
  position: relative;
  height: 85vh;
  min-height: 520px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('images/banner.jpg') no-repeat center center;
  background-size: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 20px;
  max-width: 800px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-block;
  background: var(--tibetan-red);
  color: var(--pure-white);
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 700;
  color: var(--pure-white);
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-subtitle {
  font-size: clamp(15px, 2vw, 19px);
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
  max-width: 600px;
}
.hero-actions { display:flex; gap:16px; flex-wrap:wrap; justify-content:center; }
.hero-btn-primary {
  display: inline-block;
  background: var(--tibetan-red);
  color: var(--pure-white);
  padding: 14px 36px;
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1px;
  transition: var(--transition);
}
.hero-btn-primary:hover {
  background: var(--tibetan-red-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(178,34,34,0.4);
}
.hero-btn-outline {
  display: inline-block;
  border: 2px solid var(--pure-white);
  color: var(--pure-white);
  padding: 12px 34px;
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
}
.hero-btn-outline:hover {
  background: var(--pure-white);
  color: var(--tibetan-red);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat { text-align:center; }
.hero-stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--tibetan-gold);
  line-height: 1;
}
.hero-stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-top: 4px;
  letter-spacing: 1px;
}

/* ============ SECTION COMMON ============ */
.section {
  padding: 80px 0;
}
.section-alt { background: var(--pure-white); }
.section-header {
  text-align: center;
  margin-bottom: 50px;
}
.section-tag {
  display: inline-block;
  color: var(--tibetan-red);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============ TRUST BAR ============ */
.trust-bar {
  background: var(--deep-blue);
  padding: 20px 0;
}
.trust-bar .container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
}
.trust-item i { color: var(--tibetan-gold); font-size: 18px; }

/* ============ TOUR CARDS ============ */
.tour-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tour-card {
  background: var(--pure-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid var(--border-light);
}
.tour-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--tibetan-red);
}
.tour-card-img {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.tour-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.tour-card:hover .tour-card-img img { transform: scale(1.08); }
.tour-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--tibetan-red);
  color: var(--pure-white);
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
}
.tour-card-body { padding: 20px; }
.tour-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 52px;
}
.tour-card-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.tour-card-meta i { margin-right: 4px; }
.tour-card-price {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}
.tour-card-price .price {
  font-size: 22px;
  font-weight: 700;
  color: var(--tibetan-red);
}
.tour-card-price .price small { font-size: 13px; font-weight: 400; }
.tour-card-price .btn-sm {
  padding: 8px 20px;
  background: var(--tibetan-red);
  color: var(--pure-white);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
}
.tour-card-price .btn-sm:hover { background: var(--tibetan-red-dark); }

/* ============ ABOUT SECTION ============ */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 400px;
}
.about-image img { width:100%; height:100%; object-fit:cover; }
.about-text h3 { font-size: 22px; margin-bottom: 20px; color: var(--tibetan-red); }
.about-text p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; font-size: 15px; }
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 30px;
}
.about-stat {
  text-align: center;
  padding: 16px;
  background: var(--snow-white);
  border-radius: var(--radius-sm);
}
.about-stat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--tibetan-red);
  line-height: 1;
}
.about-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============ SERVICES ============ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  text-align: center;
  padding: 36px 20px;
  background: var(--pure-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--tibetan-gold);
}
.service-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(178,34,34,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
}
.service-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ============ WHY US ============ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.why-card {
  padding: 30px;
  background: var(--pure-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  text-align: center;
  transition: var(--transition);
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.why-icon {
  font-size: 36px;
  margin-bottom: 16px;
}
.why-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.why-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ============ TESTIMONIALS ============ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.testimonial-card {
  background: var(--pure-white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.testimonial-card:hover { box-shadow: var(--shadow-hover); }
.testimonial-stars { color: var(--tibetan-gold); font-size: 14px; margin-bottom: 12px; }
.testimonial-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 16px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--tibetan-red);
  color: var(--pure-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
}
.testimonial-name { font-size: 14px; font-weight: 600; }
.testimonial-from { font-size: 12px; color: var(--text-muted); }

/* ============ GUIDE / BLOG ============ */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--pure-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.guide-card-img {
  height: 180px;
  overflow: hidden;
}
.guide-card-img img { width:100%; height:100%; object-fit:cover; }
.guide-card-body { padding: 20px; }
.guide-card-tag {
  display: inline-block;
  background: var(--tibetan-red);
  color: var(--pure-white);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  margin-bottom: 8px;
}
.guide-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.guide-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.guide-card-body .guide-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ============ CTA BANNER ============ */
.cta-banner {
  background: linear-gradient(135deg, var(--tibetan-red) 0%, var(--tibetan-red-dark) 100%);
  text-align: center;
  padding: 80px 0;
}
.cta-banner h2 {
  font-size: clamp(24px, 3vw, 34px);
  color: var(--pure-white);
  margin-bottom: 16px;
}
.cta-banner p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-banner .cta-btn {
  display: inline-block;
  background: var(--pure-white);
  color: var(--tibetan-red);
  padding: 14px 40px;
  border-radius: var(--radius-full);
  font-size: 17px;
  font-weight: 600;
  transition: var(--transition);
}
.cta-banner .cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}
.cta-banner .cta-phone {
  display: block;
  color: var(--tibetan-gold-light);
  font-size: 22px;
  font-weight: 700;
  margin-top: 16px;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--deep-blue);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer h4 {
  color: var(--pure-white);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.footer p { font-size: 14px; line-height: 1.8; }
.footer a { color: rgba(255,255,255,0.7); }
.footer a:hover { color: var(--tibetan-gold); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
}
.footer-contact-item i { color: var(--tibetan-gold); width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--tibetan-gold); }

/* ============ FLOAT BUTTON ============ */
.float-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99;
  width: 56px;
  height: 56px;
  background: var(--tibetan-red);
  color: var(--pure-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 16px rgba(178,34,34,0.4);
  transition: var(--transition);
  text-decoration: none;
}
.float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(178,34,34,0.5);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .tour-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .about-section { grid-template-columns: 1fr; gap: 30px; }
  .about-image { height: 300px; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .top-bar { display: none; }
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: var(--pure-white);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    overflow-y: auto;
  }
  .nav-menu.open { display: flex; }
  .nav-menu > li > a { padding: 14px 16px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .hero { height: 70vh; min-height: 450px; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .hero-stat-num { font-size: 22px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .tour-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .trust-bar .container { gap: 16px; }
}