/* Notepad++ Official Site - Main Stylesheet */

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

:root {
  --green: #2ECC40;
  --green-dark: #219a32;
  --green-light: #55ef64;
  --dark: #1A1D23;
  --dark-soft: #282C34;
  --dark-muted: #3a3f4b;
  --gold: #FFD700;
  --gold-dark: #e6c200;
  --bg-light: #F8F9FA;
  --bg-white: #FFFFFF;
  --text-dark: #1A1D23;
  --text-body: #4A5568;
  --text-muted: #718096;
  --border: #E2E8F0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --max-width: 1200px;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: Consolas, Monaco, 'Courier New', monospace;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--green);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--green-dark);
}

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

/* === Container === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26,29,35,0.97);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(46,204,64,0.15);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
}

.nav-logo span {
  color: var(--green);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--green);
}

.nav-download-btn {
  background: var(--green);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.nav-download-btn:hover {
  background: var(--green-dark);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(46,204,64,0.3);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* === Hero Section === */
.hero {
  background: var(--dark);
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(46,204,64,0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(46,204,64,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(46,204,64,0.1);
  border: 1px solid rgba(46,204,64,0.25);
  color: var(--green);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .text-green {
  color: var(--green);
}

.hero-desc {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green);
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--green-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46,204,64,0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.25);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--green);
  color: var(--green);
  transform: translateY(-2px);
}

.btn-gold {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gold);
  color: var(--dark);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-gold:hover {
  background: var(--gold-dark);
  color: var(--dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,215,0,0.3);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

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

.hero-stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--green);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

/* === Screenshot Section === */
.screenshot-section {
  background: var(--dark);
  padding: 0 0 80px;
  position: relative;
}

.screenshot-wrapper {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  border: 1px solid rgba(46,204,64,0.15);
}

.screenshot-wrapper img {
  width: 100%;
  display: block;
}

/* === Features Section === */
.features-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-label {
  display: inline-block;
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(46,204,64,0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}

.feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* === Comparison Section === */
.comparison-section {
  padding: 96px 0;
  background: var(--bg-light);
}

.comparison-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-table thead {
  background: var(--dark);
}

.comparison-table th {
  padding: 16px 20px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
}

.comparison-table th.highlight {
  color: var(--green);
  background: rgba(46,204,64,0.1);
}

.comparison-table td {
  padding: 14px 20px;
  text-align: center;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
}

.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
}

.comparison-table td.highlight {
  background: rgba(46,204,64,0.04);
  font-weight: 600;
  color: var(--green-dark);
}

.comparison-table tbody tr:hover {
  background: rgba(46,204,64,0.03);
}

.check-icon {
  color: var(--green);
  font-weight: 700;
}

.cross-icon {
  color: #ccc;
}

/* === Version Section === */
.version-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.version-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.version-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.version-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.version-card.featured {
  border-color: var(--green);
  position: relative;
}

.version-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--green);
  color: #fff;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
}

.version-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.version-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.version-features {
  list-style: none;
  margin-bottom: 24px;
}

.version-features li {
  padding: 6px 0;
  font-size: 0.9rem;
  color: var(--text-body);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.version-features li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
}

.version-card .btn-primary {
  width: 100%;
  justify-content: center;
  padding: 12px;
  font-size: 0.9rem;
}

/* === Tutorial Section === */
.tutorial-section {
  padding: 96px 0;
  background: var(--bg-light);
}

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.tutorial-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.tutorial-step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.tutorial-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* === Reviews Section === */
.reviews-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
}

.review-stars {
  color: var(--gold);
  font-size: 1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 18px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.review-author-info strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-dark);
}

.review-author-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === FAQ Section === */
.faq-section {
  padding: 96px 0;
  background: var(--bg-light);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(46,204,64,0.03);
}

.faq-toggle {
  font-size: 1.25rem;
  color: var(--green);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.8;
}

/* === Download CTA Section === */
.cta-section {
  padding: 96px 0;
  background: var(--dark);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(46,204,64,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-note {
  margin-top: 24px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

/* === Shortcuts Section === */
.shortcuts-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.shortcut-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--green);
  display: inline-block;
}

.shortcut-list {
  list-style: none;
}

.shortcut-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.shortcut-list li:last-child {
  border-bottom: none;
}

.shortcut-name {
  color: var(--text-body);
}

.shortcut-key {
  background: var(--dark);
  color: var(--green);
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}

/* === Footer === */
.footer {
  background: var(--dark);
  padding: 48px 0 32px;
  border-top: 1px solid rgba(46,204,64,0.1);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.footer-brand-logo img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.footer-brand-logo span {
  color: var(--green);
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}

.footer-links-group h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links-group ul {
  list-style: none;
}

.footer-links-group li {
  margin-bottom: 8px;
}

.footer-links-group a {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-links-group a:hover {
  color: var(--green);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* === Scroll Animations === */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Mobile Responsive === */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .version-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--dark);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(46,204,64,0.15);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .hero {
    padding: 120px 0 56px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-number {
    font-size: 1.4rem;
  }

  .screenshot-section {
    padding: 0 0 48px;
  }

  .features-section,
  .comparison-section,
  .version-section,
  .shortcuts-section,
  .tutorial-section,
  .reviews-section,
  .faq-section,
  .cta-section {
    padding: 64px 0;
  }

  .features-grid,
  .version-grid,
  .reviews-grid,
  .tutorial-steps {
    grid-template-columns: 1fr;
  }

  .shortcuts-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .cta-section h2 {
    font-size: 1.75rem;
  }

  .footer-inner {
    flex-direction: column;
  }

  .version-card.featured {
    margin-top: 12px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 10px 12px;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 100px 0 40px;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero-desc {
    font-size: 0.9rem;
  }

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

  .btn-primary, .btn-secondary, .btn-gold {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .container {
    padding: 0 16px;
  }

  .feature-card,
  .version-card {
    padding: 24px;
  }

  .review-card {
    padding: 20px;
  }

  .section-header {
    margin-bottom: 36px;
  }
}