/* ============================================
   ZHENGTUGUOJI3.COM.CN — 征途国际
   Awwwards-Inspired Design System
   Style: Neo-Brutalist + Japanese Avant-Garde + Fluid Glassmorphism
   Palette: Deep Ink (#0A0B0E), Burnt Saffron (#FF5A2B), Washed Indigo (#6C5CE7), Paper (#F5F1EB)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0A0B0E;
  color: #F5F1EB;
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Typography & Accent --- */
.text-accent {
  color: #FF5A2B;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-center { text-align: center; }

/* --- Container --- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* --- Site Header (Neo-Brutalist floating) --- */
.site-header {
  position: fixed;
  top: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  background: rgba(10, 11, 14, 0.75);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border: 2px solid rgba(255, 90, 43, 0.25);
  border-radius: 4rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.site-header:hover {
  border-color: #FF5A2B;
  box-shadow: 0 20px 60px rgba(255, 90, 43, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 2rem;
}

/* --- Logo --- */
.logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.06em;
  color: #F5F1EB;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: transform 0.2s ease;
}

.logo::before {
  content: "✦";
  color: #FF5A2B;
  font-size: 2rem;
  line-height: 1;
  display: inline-block;
  animation: logoPulse 3s infinite alternate;
}

.logo:hover { transform: scale(1.02); }

@keyframes logoPulse {
  0% { text-shadow: 0 0 0 #FF5A2B; }
  100% { text-shadow: 0 0 20px #FF5A2B, 0 0 40px #6C5CE7; }
}

/* --- Main Nav --- */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.main-nav a {
  color: rgba(245, 241, 235, 0.7);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.2s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: #FF5A2B;
  border-radius: 4px;
  transition: width 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.main-nav a:hover { color: #F5F1EB; }
.main-nav a:hover::after { width: 100%; }

/* --- Nav CTA --- */
.nav-cta {
  background: #FF5A2B;
  color: #0A0B0E !important;
  font-weight: 700 !important;
  padding: 0.6rem 1.8rem !important;
  border-radius: 3rem;
  transition: all 0.25s ease !important;
  border: 2px solid transparent;
}

.nav-cta::after { display: none !important; }
.nav-cta:hover {
  background: transparent !important;
  color: #FF5A2B !important;
  border-color: #FF5A2B;
  transform: translateY(-2px);
}

/* --- Menu Toggle (mobile) --- */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #F5F1EB;
  font-size: 2rem;
  cursor: pointer;
  padding: 0.2rem;
  transition: transform 0.2s ease;
}

.menu-toggle:hover { transform: rotate(90deg); }

/* --- Hero Section (Fluid Glassmorphism + Asymmetry) --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 8rem 0 6rem;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.15), transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(255, 90, 43, 0.12), transparent 50%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FF5A2B' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.4;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 2rem;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #FF5A2B;
  background: rgba(255, 90, 43, 0.12);
  padding: 0.4rem 1.4rem;
  border-radius: 4rem;
  margin-bottom: 1.8rem;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 90, 43, 0.2);
}

.hero-content h1 {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 1.05;
  color: #F5F1EB;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 40px rgba(0,0,0,0.3);
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(245, 241, 235, 0.7);
  max-width: 540px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
}

.hero-image {
  position: absolute;
  right: -8%;
  bottom: -10%;
  width: 45%;
  max-width: 600px;
  opacity: 0.5;
  pointer-events: none;
  transform: rotate(-8deg);
  filter: drop-shadow(0 40px 80px rgba(255, 90, 43, 0.2));
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.9rem 2.6rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 3rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: #FF5A2B;
  color: #0A0B0E;
  border-color: #FF5A2B;
}

.btn-primary:hover {
  background: transparent;
  color: #FF5A2B;
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(255, 90, 43, 0.25);
}

.btn-outline {
  background: transparent;
  color: #F5F1EB;
  border-color: rgba(245, 241, 235, 0.3);
}

.btn-outline:hover {
  border-color: #FF5A2B;
  color: #FF5A2B;
  transform: translateY(-4px);
  background: rgba(255, 90, 43, 0.05);
}

/* --- Section (magazine-style spacing) --- */
.section {
  padding: 7rem 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #6C5CE7;
  background: rgba(108, 92, 231, 0.1);
  padding: 0.3rem 1.2rem;
  border-radius: 4rem;
  margin-bottom: 1rem;
  border: 1px solid rgba(108, 92, 231, 0.15);
}

.section-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: #F5F1EB;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  color: rgba(245, 241, 235, 0.6);
  max-width: 600px;
  line-height: 1.7;
}

/* --- Cards Grid (Neo-Brutalist floating cards) --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.category-card {
  background: rgba(245, 241, 235, 0.04);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(245, 241, 235, 0.08);
  border-radius: 2.5rem;
  padding: 2.5rem 2rem;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255, 90, 43, 0.06), transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.category-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 90, 43, 0.3);
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}

.category-card:hover::before { opacity: 1; }

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 1.2rem;
  display: inline-block;
  color: #FF5A2B;
  transition: transform 0.3s ease;
}

.category-card:hover .card-icon { transform: scale(1.1) rotate(-5deg); }

.category-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: #F5F1EB;
}

.category-card p {
  color: rgba(245, 241, 235, 0.6);
  font-size: 0.95rem;
  line-height: 1.6;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.4rem;
  color: #FF5A2B;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
  transition: gap 0.2s ease;
}

.card-link::after { content: "→"; transition: transform 0.2s ease; }

.card-link:hover { gap: 0.8rem; }
.card-link:hover::after { transform: translateX(4px); }

/* --- Feature Block (asymmetric layout) --- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin: 5rem 0;
}

.feature-image {
  border-radius: 2rem;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 90, 43, 0.1), rgba(108, 92, 231, 0.1));
  min-height: 320px;
  border: 1px solid rgba(245, 241, 235, 0.06);
  transition: transform 0.4s ease;
}

.feature-image:hover { transform: scale(0.98); }

.feature-text {
  padding: 1rem 0;
}

.feature-text h3 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
}

.feature-text p {
  color: rgba(245, 241, 235, 0.6);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: rgba(245, 241, 235, 0.8);
}

.feature-list li::before {
  content: "▸";
  color: #FF5A2B;
  font-weight: 700;
}

/* --- Stats Bar (brutalist counter) --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
  padding: 4rem 0;
  border-top: 1px solid rgba(245, 241, 235, 0.06);
  border-bottom: 1px solid rgba(245, 241, 235, 0.06);
  margin: 4rem 0;
}

.stat-item {
  text-align: center;
  padding: 1rem;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #FF5A2B;
  line-height: 1;
  margin-bottom: 0.4rem;
  display: block;
}

.stat-label {
  font-size: 0.9rem;
  color: rgba(245, 241, 235, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Content Wall (masonry-like grid) --- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.content-wall-item {
  background: rgba(245, 241, 235, 0.03);
  border-radius: 1.8rem;
  padding: 2rem;
  border: 1px solid rgba(245, 241, 235, 0.06);
  transition: all 0.3s ease;
  position: relative;
}

.content-wall-item:hover {
  background: rgba(255, 90, 43, 0.04);
  border-color: rgba(255, 90, 43, 0.15);
  transform: translateY(-4px);
}

.content-wall-body {
  font-size: 0.95rem;
  color: rgba(245, 241, 235, 0.7);
  line-height: 1.7;
}

.content-wall-body strong {
  color: #F5F1EB;
  font-weight: 700;
}

/* --- FAQ List (accordion style) --- */
.faq-list {
  max-width: 800px;
  margin: 3rem auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.faq-item {
  background: rgba(245, 241, 235, 0.03);
  border: 1px solid rgba(245, 241, 235, 0.06);
  border-radius: 1.5rem;
  padding: 1.2rem 1.8rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 90, 43, 0.2);
  background: rgba(255, 90, 43, 0.03);
}

.faq-item summary {
  font-size: 1.1rem;
  font-weight: 600;
  color: #F5F1EB;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  cursor: pointer;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: #FF5A2B;
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(245, 241, 235, 0.06);
  color: rgba(245, 241, 235, 0.6);
  line-height: 1.7;
}

/* --- CTA Banner (glassmorphism spotlight) --- */
.cta-banner {
  background: linear-gradient(135deg, rgba(255, 90, 43, 0.08), rgba(108, 92, 231, 0.08));
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 90, 43, 0.15);
  border-radius: 3rem;
  padding: 4rem 3rem;
  text-align: center;
  margin: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 90, 43, 0.1), transparent 70%);
  pointer-events: none;
}

.cta-banner h2 {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
  position: relative;
}

.cta-banner p {
  color: rgba(245, 241, 235, 0.6);
  max-width: 500px;
  margin: 0 auto 2rem;
  position: relative;
}

/* --- Site Footer (brutalist layered) --- */
.site-footer {
  border-top: 1px solid rgba(245, 241, 235, 0.06);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: rgba(245, 241, 235, 0.5);
  font-size: 0.9rem;
  max-width: 300px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(245, 241, 235, 0.4);
  margin-bottom: 1.2rem;
}

.footer-col a {
  display: block;
  color: rgba(245, 241, 235, 0.6);
  text-decoration: none;
  padding: 0.3rem 0;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.footer-col a:hover { color: #FF5A2B; }

.footer-bottom {
  border-top: 1px solid rgba(245, 241, 235, 0.04);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: rgba(245, 241, 235, 0.3);
}

/* --- SEO Description (subtle utility) --- */
.seo-description {
  font-size: 0.8rem;
  color: rgba(245, 241, 235, 0.2);
  text-align: center;
  margin-top: 2rem;
  letter-spacing: 0.02em;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .feature-block { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .container { padding: 0 1.2rem; }

  .site-header {
    top: 0.8rem;
    left: 0.8rem;
    right: 0.8rem;
    border-radius: 2rem;
  }

  .header-inner { padding: 0.6rem 1.2rem; }

  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 11, 14, 0.98);
    backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    pointer-events: none;
    z-index: 999;
  }

  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .main-nav a { font-size: 1.4rem; }

  .menu-toggle { display: block; z-index: 1001; position: relative; }

  .hero { padding: 6rem 0 4rem; }
  .hero-content h1 { font-size: clamp(2.4rem, 12vw, 4rem); }
  .hero-content p { font-size: 1rem; }
  .hero-buttons { flex-direction: column; align-items: center; }

  .cards-grid { grid-template-columns: 1fr; gap: 1.2rem; }

  .stats-bar { grid-template-columns: 1fr 1fr; gap: 1.5rem; }

  .content-wall { grid-template-columns: 1fr; }

  .cta-banner { padding: 2.5rem 1.5rem; border-radius: 2rem; }
  .cta-banner h2 { font-size: 2rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .site-header { top: 0.5rem; left: 0.5rem; right: 0.5rem; }
  .header-inner { padding: 0.4rem 1rem; }
  .logo { font-size: 1.4rem; }
  .logo::before { font-size: 1.4rem; }

  .hero { padding: 5rem 0 3rem; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-eyebrow { font-size: 0.7rem; padding: 0.3rem 1rem; }

  .btn { padding: 0.7rem 1.8rem; font-size: 0.9rem; }

  .section { padding: 4rem 0; }
  .section-title { font-size: 1.8rem; }
  .section-desc { font-size: 0.95rem; }

  .category-card { padding: 1.8rem 1.2rem; }
  .stat-number { font-size: 2.5rem; }
  .feature-text h3 { font-size: 1.5rem; }

  .faq-item { padding: 1rem 1.2rem; }
  .faq-item summary { font-size: 1rem; }
}