:root {
  --primary: #FF6B35;
  --secondary: #4ECDC4;
  --accent: #FFD93D;
  --dark: #0a0f1a;
  --darker: #05070c;
  --card-bg: rgba(20, 28, 45, 0.85);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--dark);
  color: #fff;
  overflow-x: hidden;
}

.header-scrolled {
  background: rgba(10, 15, 26, 0.95) !important;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.page-hero-guide {
  position: relative;
  min-height: 55vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 4rem;
  background: linear-gradient(135deg, #1a0f2e 0%, #0d2a26 50%, #1a1209 100%);
  overflow: hidden;
}

.page-hero-guide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://filetx.3633yx.com/250419-440961dadc3f406ea68119526cfd15fb.jpeg') center/cover no-repeat;
  opacity: 0.25;
}

.page-hero-guide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(255, 107, 53, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 80% 70%, rgba(78, 205, 196, 0.2) 0%, transparent 45%);
}

.hero-guide-content {
  position: relative;
  z-index: 10;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.hero-guide-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 1rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.hero-guide-desc {
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.75);
  max-width: 700px;
  line-height: 1.7;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 0.75rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.section-title.center {
  display: block;
  text-align: center;
}

.section-title.center::after {
  left: 50%;
  transform: translateX(-50%);
}

.section-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.guide-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  justify-content: center;
}

.guide-tab {
  padding: 0.6rem 1.25rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.75);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.guide-tab:hover, .guide-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.guide-card {
  background: var(--card-bg);
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
  height: 100%;
}

.guide-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  border-color: rgba(78, 205, 196, 0.3);
}

.guide-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--secondary), #2dd4bf);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 1.25rem;
}

.guide-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: #fff;
}

.guide-card p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

.faq-section {
  background: linear-gradient(180deg, var(--dark) 0%, rgba(255, 107, 53, 0.05) 100%);
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1rem;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 217, 61, 0.2);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--accent);
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.5rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.5rem;
}

.download-section {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.2) 0%, rgba(78, 205, 196, 0.15) 100%);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://filetx.3633yx.com/250419-b81aaeba01a84145a2a522c1b4cc9a0c.jpeg') center/cover no-repeat;
  opacity: 0.1;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  padding: 1rem 2.5rem;
  border-radius: 9999px;
  background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  border: 2px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4), inset 0 2px 0 rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  text-decoration: none;
}

.download-btn:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 12px 35px rgba(255, 107, 53, 0.55), inset 0 2px 0 rgba(255, 255, 255, 0.2);
}

.footer-link {
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.3s ease;
  text-decoration: none;
}

.footer-link:hover {
  color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .page-hero-guide {
    min-height: 45vh;
    padding: 5rem 0 3rem;
  }

  .guide-tabs {
    gap: 0.5rem;
  }

  .guide-tab {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }
}