/* ===== Telegram 纸飞机安全下载站 - Global Styles ===== */
/* Pure CSS, no frameworks */

/* ===== CSS Variables ===== */
:root {
  --primary: #24a1de;
  --primary-dark: #1a8bc4;
  --primary-gradient: linear-gradient(135deg, #24a1de, #1e96c8);
  --secondary: #0d47a1;
  --bg: #ffffff;
  --surface: #f5f7fa;
  --surface-dark: #e8edf2;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --success: #22c55e;
  --warning: #f59e0b;
  --star: #fbbf24;
  --footer-bg: #1a1a2e;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(36,161,222,0.15);
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --container: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

img, svg {
  max-width: 100%;
  display: block;
}

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

ul, ol {
  list-style: none;
}

/* ===== Animations ===== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

@keyframes float-delayed {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

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

.section-padding {
  padding: 80px 0;
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(232,237,242,0.8);
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.logo svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(0,0,0,0.03);
}

.nav-links a.active {
  color: var(--primary);
  background: rgba(36,161,222,0.1);
}

.nav-links a.active:hover {
  background: rgba(36,161,222,0.15);
}

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #24a1de 0%, #1e96c8 50%, #0d47a1 100%);
  padding: 140px 0 100px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.12) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

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

.hero-planes {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.hero-plane {
  position: absolute;
  opacity: 0.15;
  animation: float 4s ease-in-out infinite;
}

.hero-plane:nth-child(1) {
  top: 15%;
  left: 10%;
  width: 60px;
  animation-duration: 5s;
}

.hero-plane:nth-child(2) {
  top: 60%;
  right: 15%;
  width: 80px;
  animation-duration: 6s;
  animation-delay: 1s;
}

.hero-plane:nth-child(3) {
  top: 25%;
  right: 25%;
  width: 45px;
  animation-duration: 4.5s;
  animation-delay: 0.5s;
}

.hero-plane:nth-child(4) {
  bottom: 20%;
  left: 20%;
  width: 50px;
  animation-duration: 5.5s;
  animation-delay: 2s;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 10px rgba(0,0,0,0.15);
  margin-bottom: 20px;
}

.hero .subtitle {
  font-size: 20px;
  color: rgba(255,255,255,0.9);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero .platform-note {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-top: 16px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-primary {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
  color: var(--primary-dark);
}

.btn-gradient {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(36,161,222,0.3);
}

.btn-gradient:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 25px rgba(36,161,222,0.4);
}

.btn-gradient:active {
  transform: scale(0.98);
}

.btn-large {
  padding: 18px 40px;
  font-size: 18px;
  border-radius: 14px;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: inline-block;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(36,161,222,0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: #ffffff;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Platform Cards (Downloads) ===== */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--bg);
  border: 1px solid var(--surface-dark);
  border-radius: var(--radius-card);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(36,161,222,0.3);
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border-radius: 16px;
}

.platform-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.platform-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.platform-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ===== Detailed Feature Blocks ===== */
.detail-block {
  display: flex;
  align-items: center;
  gap: 60px;
  margin-bottom: 60px;
}

.detail-block:nth-child(even) {
  flex-direction: row-reverse;
}

.detail-visual {
  flex: 0 0 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-visual .icon-circle {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 40px rgba(36,161,222,0.2);
}

.detail-visual .icon-circle svg {
  width: 80px;
  height: 80px;
  color: #ffffff;
}

.detail-text {
  flex: 1;
}

.detail-text h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.detail-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

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

.review-card:hover {
  box-shadow: var(--shadow-card);
  border-color: rgba(36,161,222,0.2);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
}

.review-meta h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-top: 2px;
}

.review-stars svg {
  width: 14px;
  height: 14px;
  color: var(--star);
}

.review-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Stats Section ===== */
.stats-section {
  background: var(--surface);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-item .stat-label {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== Comparison Table ===== */
.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--surface-dark);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg);
}

.comparison-table th {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 15px;
}

.comparison-table th:first-child {
  border-radius: var(--radius-card) 0 0 0;
}

.comparison-table th:last-child {
  border-radius: 0 var(--radius-card) 0 0;
}

.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--surface-dark);
  font-size: 15px;
}

.comparison-table tr:nth-child(even) {
  background: var(--surface);
}

.comparison-table tr:last-child td:first-child {
  border-radius: 0 0 0 var(--radius-card);
}

.comparison-table tr:last-child td:last-child {
  border-radius: 0 0 var(--radius-card) 0;
}

.comparison-table .col-tg {
  background: rgba(36,161,222,0.06);
  color: var(--primary);
  font-weight: 600;
}

.comparison-table .check svg,
.comparison-table .cross svg {
  width: 20px;
  height: 20px;
  display: inline-block;
  vertical-align: middle;
  margin-right: 4px;
}

.comparison-table .check {
  color: var(--success);
}

.comparison-table .cross {
  color: #ef4444;
}

/* ===== FAQ Accordion ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: rgba(36,161,222,0.2);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== Download Page Specific ===== */
.download-hero .hero-content {
  max-width: 600px;
}

.download-hero .platform-icon-large {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(255,255,255,0.15);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-hero .platform-icon-large svg {
  width: 40px;
  height: 40px;
  color: #ffffff;
}

.download-meta {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin: 16px 0 24px;
  font-size: 14px;
  color: rgba(255,255,255,0.8);
}

.download-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.download-meta svg {
  width: 16px;
  height: 16px;
  color: rgba(255,255,255,0.7);
}

/* Install Steps */
.steps-list {
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  align-items: flex-start;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.step-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* System Requirements Table */
.req-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--surface-dark);
}

.req-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg);
}

.req-table th {
  background: var(--surface);
  padding: 14px 18px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--surface-dark);
}

.req-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--surface-dark);
  font-size: 14px;
  color: var(--text-primary);
}

.req-table tr:hover {
  background: rgba(36,161,222,0.03);
}

/* Changelog */
.changelog-list {
  max-width: 800px;
  margin: 0 auto;
}

.changelog-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--surface-dark);
}

.changelog-item:last-child {
  border-bottom: none;
}

.changelog-version {
  flex-shrink: 0;
  width: 100px;
}

.changelog-version .version-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-gradient);
  color: #ffffff;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.changelog-version .version-date {
  font-size: 13px;
  color: var(--text-muted);
}

.changelog-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Security Notice */
.security-notice {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 40px;
}

.security-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.security-item:last-child {
  margin-bottom: 0;
}

.security-item svg {
  width: 24px;
  height: 24px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

.security-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== SEO Page Specific ===== */
.tips-list {
  max-width: 800px;
  margin: 0 auto;
}

.tip-item {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg);
  border: 1px solid var(--surface-dark);
  border-radius: var(--radius-btn);
  margin-bottom: 12px;
  align-items: flex-start;
  transition: var(--transition);
}

.tip-item:hover {
  border-color: rgba(36,161,222,0.3);
  box-shadow: var(--shadow-card);
}

.tip-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tip-content h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.tip-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.seo-content-block {
  max-width: 800px;
  margin: 0 auto;
}

.seo-content-block p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 20px;
}

/* Comparison Cards (SEO page) */
.compare-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.compare-card {
  background: var(--bg);
  border: 1px solid var(--surface-dark);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: var(--transition);
}

.compare-card:hover {
  box-shadow: var(--shadow-card);
}

.compare-card .compare-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--surface-dark);
}

.compare-card .compare-header svg {
  width: 32px;
  height: 32px;
}

.compare-card .compare-header h3 {
  font-size: 18px;
  font-weight: 600;
}

.compare-card ul {
  list-style: none;
}

.compare-card ul li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.compare-card ul li svg {
  width: 16px;
  height: 16px;
  color: var(--success);
  flex-shrink: 0;
}

/* ===== Footer ===== */
.footer {
  background: var(--footer-bg);
  padding: 48px 24px;
  text-align: center;
}

.footer-security {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--success);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 16px;
}

.footer-security svg {
  width: 20px;
  height: 20px;
  color: var(--success);
}

.footer p {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
}

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

/* ===== Alternating Background Sections ===== */
.bg-surface {
  background: var(--surface);
}

/* ===== Responsive Styles ===== */
@media (max-width: 1023px) {
  .section-padding {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .section-title {
    font-size: 30px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .detail-block {
    flex-direction: column !important;
    gap: 32px;
    text-align: center;
  }

  .detail-visual {
    flex: none;
  }

  .compare-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .section-padding {
    padding: 40px 0;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  .section-title {
    font-size: 24px;
  }

  .features-grid,
  .platform-grid,
  .reviews-grid,
  .stats-grid,
  .compare-cards {
    grid-template-columns: 1fr;
  }

  .hamburger {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--surface-dark);
    border-radius: 0 0 var(--radius-card) var(--radius-card);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: none;
  }

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

  .nav-links a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .detail-visual .icon-circle {
    width: 140px;
    height: 140px;
  }

  .detail-visual .icon-circle svg {
    width: 60px;
    height: 60px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px 14px;
    font-size: 13px;
  }

  .btn-large {
    padding: 14px 28px;
    font-size: 16px;
  }

  .stat-item .stat-number {
    font-size: 36px;
  }

  .changelog-item {
    flex-direction: column;
    gap: 8px;
  }

  .download-meta {
    flex-direction: column;
    gap: 8px;
  }

  .step-item {
    gap: 14px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}

/* ===== Print ===== */
@media print {
  .navbar,
  .footer,
  .hero-planes {
    display: none;
  }

  .hero {
    padding: 40px 0;
    background: none;
    color: #000;
  }

  .hero h1,
  .hero .subtitle {
    color: #000;
  }
}