:root {
  --bg: #030305;
  --text-primary: #ffffff;
  --text-secondary: #d5d5d5;
  --accent: #8A63F8;
  --success: #00FF88;
  --glass-bg: rgba(20, 20, 25, 0.4);
  --glass-border: rgba(255, 255, 255, 0.08);
  --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --accent-gradient: linear-gradient(135deg, #8A63F8 0%, #5C43FA 100%);
  --accent-gradient-hover: linear-gradient(135deg, #9C7AFA 0%, #6D56FB 100%);
  --accent-text-gradient: linear-gradient(90deg, #9C7AFA 0%, #5A8CFF 100%);
  --video-overlay-gradient: linear-gradient(90deg, rgba(5, 5, 8, 0.95) 0%, rgba(29, 29, 53, 0.182) 40%, rgba(5, 5, 8, 0.4) 100%);
}

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

html, body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.hero-section {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 2rem 4rem;
}

.video-container {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay {
  position: absolute;
  inset: 0;
  background: var(--video-overlay-gradient);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-decoration: none;
  transition: 0.3s ease;
}
.btn-primary {
  background: var(--accent-gradient);
  color: var(--text-primary);
  box-shadow: 0 8px 24px rgba(138, 99, 248, 0.25);
}
.btn-primary:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(138, 99, 248, 0.4);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ===== 导航 ===== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 2rem;
  position: relative;
  z-index: 50;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
  text-decoration: none;
  text-transform: uppercase;
}
.logo .ph { font-size: 1.8rem; }
.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  position: relative;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; }
.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem;
}

/* ===== 移动菜单 ===== */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(3, 3, 5, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  padding: 2rem;
}
.mobile-menu.open { display: flex; }
.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  text-align: center;
  margin: 0;
  padding: 0;
}
.mobile-nav-links a {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-primary);
  text-decoration: none;
}

/* ===== Hero 内容 ===== */
.hero-content {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 2rem 0;
}
.text-wrapper { max-width: 800px; }
.greeting {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.main-title {
  font-family: var(--font-heading);
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.sub-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 500;
  background: var(--accent-text-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 2rem;
}
.cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Hero 底部 ===== */
.hero-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  position: relative;
  z-index: 10;
}
.footer-left { display: flex; align-items: center; gap: 1.5rem; }
.availability-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1.5rem 2rem;
  max-width: 320px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}
.availability-text {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  white-space: nowrap;
}
.pulse-dot {
  position: relative;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}
.pulse-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-out infinite;
}
.social-links { display: flex; gap: 0.75rem; }
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 1.25rem;
  text-decoration: none;
  transition: 0.3s ease;
}
.social-link:hover {
  background: #ffffff;
  color: var(--bg);
  border-color: #ffffff;
  transform: translateY(-3px);
}
.stats-group { display: flex; align-items: center; gap: 2rem; }
.stat { display: flex; flex-direction: column; }
.stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-primary);
}
.stat-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}
.stat-line { width: 1px; height: 40px; background: var(--glass-border); }
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.mouse {
  width: 26px;
  height: 42px;
  border: 2px solid var(--text-secondary);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.wheel {
  width: 4px;
  height: 8px;
  background: var(--text-primary);
  border-radius: 2px;
  animation: wheelScroll 2s ease-in-out infinite;
}
.scroll-indicator span {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ===== 动画 ===== */
.animate-fade-up {
  opacity: 0;
  animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  animation-delay: var(--d, 0s);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes wheelScroll {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(15px); opacity: 0; }
}
@keyframes pulse {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.5); opacity: 0; }
}

/* ===== 焦点可见性 ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

body.no-scroll { overflow: hidden; }

/* ===== 减弱动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .animate-fade-up { animation: none; opacity: 1; }
  .wheel { animation: none; }
  .pulse-dot::after { animation: none; }
  .btn-primary:hover { transform: none; }
  .social-link:hover { transform: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .hero-section { padding: 2rem; }
  .main-title { font-size: 4.5rem; }
}
@media (max-width: 1024px) {
  .nav-links, .nav-actions { display: none; }
  .mobile-menu-toggle { display: inline-flex; }
  .hero-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 3rem;
  }
  .scroll-indicator { display: none; }
  .footer-left { width: 100%; justify-content: space-between; }
  .availability-card { max-width: 100%; }
}
@media (max-width: 768px) {
  .hero-section { padding: 1.5rem; }
  .main-title { font-size: 3.5rem; }
  .sub-title { font-size: 1.4rem; }
  .cta-group { flex-direction: column; align-items: stretch; }
  .cta-group .btn { width: 100%; }
  .footer-left { flex-direction: column; align-items: flex-start; }
  .stats-group { flex-wrap: wrap; gap: 1.25rem 1.5rem; }
  .stat-line { display: none; }
}
@media (max-width: 480px) {
  .main-title { font-size: 2.8rem; }
  .sub-title { font-size: 1.2rem; }
}