/* ===================================
   Svggram 首页样式
   =================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #4A90E2;
  --color-primary-dark: #357ABD;
  --color-success: #52C41A;
  --color-warning: #FAAD14;
  --color-error: #F5222D;
  --color-pro: #FA8C16;
  --color-pro-bg: #FFF7E6;

  /* Neutrals */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F7F8FA;
  --color-text: #1F1F1F;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-border: #E8E8E8;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  --font-size-4xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Z-index */
  --z-header: 1000;
  --z-mobile-nav: 999;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Container */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===================================
   Header
   =================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-header);
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  padding: var(--space-sm) 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link.active {
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.locale-switch {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.locale-switch:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

/* Locale Switcher Dropdown */
.locale-switcher-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  font-family: inherit;
}
.locale-switcher-btn:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}
.locale-switcher-btn svg {
  flex-shrink: 0;
}
.locale-switcher-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  min-width: 140px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  z-index: 1000;
  overflow: hidden;
}
.locale-switcher-item {
  display: block;
  padding: 10px 14px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: background 0.15s;
}
.locale-switcher-item:hover {
  background: var(--color-bg-secondary);
}
.locale-switcher-item.active {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-bg-secondary);
}
.locale-switcher-dropdown.hidden {
  display: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-outline {
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-ghost {
  color: var(--color-text-secondary);
  background: transparent;
}

.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-bg-secondary);
}

.btn-text {
  color: var(--color-text-secondary);
  background: transparent;
}

.btn-text:hover {
  color: var(--color-text);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
}

.btn-block {
  width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  padding: var(--space-sm);
  color: var(--color-text);
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background: var(--color-bg);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-mobile-nav);
  padding: var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-mobile-nav);
}

.mobile-nav-overlay.open {
  display: block;
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.mobile-nav-close {
  padding: var(--space-sm);
  color: var(--color-text-secondary);
}

.mobile-nav .nav-link {
  display: block;
  padding: var(--space-md) 0;
  font-size: var(--font-size-base);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-lg) 0;
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  padding: 140px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.hero .subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
   Editor Preview Section
   =================================== */

.editor-preview {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
}

.editor-preview-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.editor-mockup {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-border);
  overflow: hidden;
}

.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.editor-menu {
  display: flex;
  gap: var(--space-lg);
}

.editor-menu span {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.editor-actions {
  display: flex;
  gap: var(--space-md);
}

.editor-sync-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.editor-sync-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.editor-canvas {
  display: flex;
  min-height: 400px;
  background: #fafafa;
}

.editor-tools-left {
  width: 48px;
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.tool-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: var(--color-border);
}

.tool-btn.active {
  background: var(--color-primary);
  color: #fff;
}

.editor-canvas-area {
  flex: 1;
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-svg {
  width: 100%;
  max-width: 500px;
  height: auto;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.1));
}

.editor-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.editor-hint {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===================================
   Features Section
   =================================== */

.features {
  padding: var(--space-3xl) 0;
  background: var(--color-bg);
}

.features h2 {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-slow);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===================================
   Pricing Section
   =================================== */

.pricing {
  padding: var(--space-3xl) 0;
  background: var(--color-bg-secondary);
}

.pricing h2 {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2xl);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid var(--color-border);
  position: relative;
}

.pricing-card.pro {
  border: 2px solid var(--color-primary);
}

.pro-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-pro);
  color: #fff;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.pricing-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.pricing-card .price {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.pricing-card .price span {
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing-features {
  margin: var(--space-lg) 0;
  text-align: left;
}

.pricing-features li {
  padding: var(--space-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 600;
}

.pricing-features li.disabled {
  color: var(--color-text-muted);
}

.pricing-features li.disabled::before {
  content: '✗';
  color: var(--color-text-muted);
}

.btn-pricing {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--font-size-base);
}

.pricing-note {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===================================
   CTA Section
   =================================== */

.cta {
  padding: var(--space-3xl) 0;
  background: var(--color-bg);
  text-align: center;
}

.cta h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.cta p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

/* ===================================
   Footer
   =================================== */

.footer {
  padding: var(--space-2xl) 0;
  background: var(--color-text);
  color: var(--color-text-muted);
  text-align: center;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #fff;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-copyright a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

.footer-copyright a:hover {
  color: #fff;
}

/* ===================================
   Responsive
   =================================== */

@media (max-width: 768px) {
  /* Header */
  .nav,
  .header-actions {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: var(--font-size-2xl);
  }

  .hero .subtitle {
    font-size: var(--font-size-base);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* Pricing */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.pro {
    order: -1;
  }

  /* Footer */
  .footer-links {
    flex-direction: column;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 36px;
    --font-size-3xl: 28px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .editor-canvas {
    min-height: 250px;
  }

  .editor-tools-left {
    width: 40px;
  }

  .tool-btn {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-xs);
  }
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fadeIn 0.6s ease-out;
}

.feature-card {
  animation: fadeIn 0.6s ease-out;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }