/* ===================================================
   HexNova — common.css
   所有页面共享的基础样式
   =================================================== */

/* ===== Design Tokens ===== */
:root {
  --canvas:        #080a14;
  --canvas-deep:   #050710;
  --surface:        #0f1220;
  --surface-raised: #151929;
  --surface-border: #1e2338;
  --mango:         #f5a623;
  --mango-glow:    #ffbe4a;
  --mango-dim:     #a06b15;
  --cyan:          #00c8ff;
  --cyan-glow:     #5adeff;
  --cyan-dim:      #0078a0;
  --text-primary:   #eef0f6;
  --text-secondary: #8b90a8;
  --text-tertiary:  #555a72;
  --success:        #52c41a;
  --error:         #ff4d4f;
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-mango:    0 0 50px -12px rgba(245,166,35,0.25);
  --shadow-mango-sm: 0 0 25px -6px rgba(245,166,35,0.2);
  --shadow-cyan-sm:  0 0 25px -6px rgba(0,200,255,0.2);
  --shadow-card:     0 4px 24px -6px rgba(0,0,0,0.4);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  background: var(--canvas);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ===== Utilities ===== */
.container { max-width: 1120px; margin: 0 auto; padding: 0 1.5rem; }

.gradient-mango {
  background: linear-gradient(135deg, var(--mango), var(--mango-glow));
}
.gradient-mango-text {
  background: linear-gradient(135deg, var(--mango), var(--mango-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }

/* ===== Animations ===== */
@keyframes fadeIn     { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp     { from { opacity: 0; transform: translateY(32px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulseGlow  { 0%,100% { opacity: 0.3; } 50% { opacity: 0.7; } }
@keyframes gradientShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
@keyframes float       { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.animate-fade-in      { animation: fadeIn 0.8s ease-out forwards; }
.animate-slide-up     { opacity: 0; animation: slideUp 0.8s ease-out forwards; }
.animate-slide-up-1  { opacity: 0; animation: slideUp 0.8s ease-out 0.1s forwards; }
.animate-slide-up-2  { opacity: 0; animation: slideUp 0.8s ease-out 0.2s forwards; }
.animate-slide-up-3  { opacity: 0; animation: slideUp 0.8s ease-out 0.35s forwards; }

/* ===== Navbar (used by index.html & download.html) ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: var(--transition-smooth);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(8,10,20,0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--surface-border);
}
.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 4rem;
}
.logo { display: flex; align-items: center; gap: 0.7rem; }
.logo-icon {
  width: 2rem; height: 2rem; border-radius: 0.5rem;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.85rem; color: var(--canvas-deep);
  box-shadow: var(--shadow-mango-sm);
}
.logo-text { font-weight: 600; font-size: 1.1rem; letter-spacing: -0.02em; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a {
  font-size: 0.875rem; color: var(--text-secondary);
  transition: color 0.3s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta { display: flex; align-items: center; gap: 1rem; }
.nav-cta .login-link {
  font-size: 0.875rem; color: var(--text-secondary);
  transition: color 0.3s;
}
.nav-cta .login-link:hover { color: var(--text-primary); }

.btn-primary {
  padding: 0.55rem 1.4rem; border-radius: 0.5rem;
  font-weight: 600; font-size: 0.875rem;
  color: var(--canvas-deep); box-shadow: var(--shadow-mango-sm);
  transition: var(--transition-smooth);
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.mobile-toggle { display: none; padding: 0.5rem; color: var(--text-secondary); }
.mobile-menu {
  display: none; position: absolute; top: 4rem; left: 0; right: 0;
  background: rgba(8,10,20,0.95); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--surface-border); padding: 1.5rem;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 0.75rem 0; color: var(--text-secondary);
  font-size: 1rem; border-bottom: 1px solid var(--surface-border);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .btn-mobile-cta {
  display: block; margin-top: 1rem; padding: 0.75rem; border-radius: 0.5rem;
  text-align: center; font-weight: 600; color: var(--canvas-deep);
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .mobile-toggle { display: block; }
}

/* ===== Footer (used by ALL pages) ===== */
.footer {
  border-top: 1px solid var(--surface-border);
  background: var(--canvas-deep);
  padding: 4rem 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem; padding-bottom: 3rem;
}
.footer-brand p {
  color: var(--text-secondary); max-width: 280px;
  margin: 1.25rem 0; font-size: 0.95rem; line-height: 1.65;
}
.footer-email { color: var(--text-tertiary); font-size: 0.875rem; transition: color 0.3s; }
.footer-email:hover { color: var(--text-primary); }
.footer-col h4 {
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.12em; margin-bottom: 1rem; color: var(--text-primary);
}
.footer-col li { padding: 0.3rem 0; }
.footer-col a { font-size: 0.875rem; color: var(--text-tertiary); transition: color 0.3s; }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.75rem 0; border-top: 1px solid var(--surface-border);
  font-size: 0.85rem; color: var(--text-tertiary);
}
.footer-bottom a { color: var(--text-tertiary); transition: color 0.3s; }
.footer-bottom a:hover { color: var(--text-primary); }

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--canvas); }
::-webkit-scrollbar-thumb { background: var(--surface-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }