/* 
 * 旧巷 (JiuXiang) jiux.mom - Dark Gold Luxury Corporate Design System
 * Scheme 4: 沉稳黑金 / 暗高定 (Dark Gold / Monochrome High-End / Modern Corporate)
 */

:root {
  --bg-color: #0b0d12;
  --bg-surface: #141721;
  --bg-card: #1a1e2b;
  --bg-card-hover: #222738;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  /* Metallic Gold Palette */
  --gold-primary: #d4af37;
  --gold-hover: #e5c158;
  --gold-light: #f3e5ab;
  --gold-gradient: linear-gradient(135deg, #d4af37 0%, #f5d77f 50%, #e5c158 100%);
  --gold-glow: 0 0 25px rgba(212, 175, 55, 0.3);
  --gold-border: 1px solid rgba(212, 175, 55, 0.25);
  --gold-border-active: 1px solid rgba(212, 175, 55, 0.6);
  
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-blue: #38bdf8;
  
  /* Shadows & Glassmorphism */
  --shadow-flat: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.7), 0 0 20px rgba(212, 175, 55, 0.15);
  --glass-bg: rgba(20, 23, 33, 0.85);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.3;
}

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

/* App Layout with Sidebar Floor Navigation */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Floating Sidebar Navigation (Desk) */
.sidebar-nav {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  width: 72px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  box-shadow: var(--shadow-flat);
  padding: 20px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.sidebar-nav:hover {
  width: 220px;
  align-items: flex-start;
  padding: 20px 16px;
  border-color: rgba(212, 175, 55, 0.5);
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  overflow: hidden;
}

.brand-icon img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.nav-links {
  list-style: none;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-item a .icon {
  font-size: 1.25rem;
  min-width: 24px;
  text-align: center;
}

.nav-item a .label {
  opacity: 0;
  transform: translateX(-10px);
  transition: var(--transition);
  pointer-events: none;
}

.sidebar-nav:hover .nav-item a .label {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--gold-primary);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

/* Mobile Header Navigation */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--bg-surface);
  border-bottom: var(--gold-border);
  z-index: 99;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gold-primary);
}

.mobile-brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.mobile-nav-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: var(--gold-border);
  color: var(--gold-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: 110px;
  padding: 40px 40px 40px 20px;
  max-width: 1360px;
}

/* Asymmetric Section Layout */
section {
  margin-bottom: 80px;
}

/* Hero Section (Two Column Console Style) */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: center;
  padding: 30px 0;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(212, 175, 55, 0.1);
  border: var(--gold-border);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold-primary);
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 2.85rem;
  line-height: 1.2;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.hero-title span {
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Hero 3 Side-by-Side Buttons Container */
.hero-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  flex-wrap: wrap; /* Graceful wrap on narrower screens */
}

/* Dark Gold Buttons */
.btn-neumorphic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text-main);
  border: var(--gold-border);
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-neumorphic:hover {
  background: var(--bg-card-hover);
  border-color: var(--gold-primary);
  color: var(--gold-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

.btn-neumorphic:active {
  transform: translateY(0);
}

/* Primary Button Accent (⚡ 免费注册 / 黑金调) */
.btn-primary-neumorphic {
  background: var(--gold-gradient);
  color: #0b0d12;
  border: none;
  font-weight: 800;
  box-shadow: var(--gold-glow);
}

.btn-primary-neumorphic:hover {
  background: var(--gold-hover);
  color: #000000;
  box-shadow: 0 0 35px rgba(212, 175, 55, 0.5);
  transform: translateY(-2px);
}

/* SaaS Console Terminal Hero Card (Right Column) */
.console-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-flat);
  padding: 24px;
  border: var(--gold-border);
  position: relative;
  overflow: hidden;
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 20px;
}

.console-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.console-title {
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--gold-primary);
  font-weight: 700;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.node-status-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.05);
  font-size: 0.9rem;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.flag-icon {
  font-size: 1.2rem;
}

.node-metrics {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: monospace;
  font-size: 0.85rem;
}

.ping-time {
  color: var(--accent-green);
  font-weight: 700;
}

.node-load {
  color: var(--text-muted);
}

.terminal-box {
  margin-top: 18px;
  background: #090a0f;
  border-radius: var(--radius-md);
  border: 1px solid rgba(212, 175, 55, 0.15);
  padding: 14px 18px;
  color: #38bdf8;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
}

.terminal-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-prompt {
  color: var(--gold-primary);
}

/* Features Grid */
.section-title-wrap {
  margin-bottom: 36px;
}

.section-title {
  font-size: 2.1rem;
  margin-bottom: 10px;
  color: var(--text-main);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  box-shadow: var(--shadow-flat);
  padding: 30px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-hover);
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--gold-primary);
}

.feature-card h3 {
  font-size: 1.25rem;
}

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

/* Pricing Section (Horizontal Wide Card / Tab Switching) */
.pricing-section {
  padding: 20px 0;
}

.tab-switch-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.tab-switcher {
  display: inline-flex;
  padding: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: var(--gold-border);
  gap: 6px;
}

.tab-btn {
  padding: 10px 28px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--gold-gradient);
  color: #0b0d12;
  box-shadow: var(--gold-glow);
}

/* Horizontal Wide Pricing Card Container */
.pricing-cards-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.pricing-wide-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  box-shadow: var(--shadow-flat);
  padding: 32px;
  display: grid;
  grid-template-columns: 260px 1fr 220px;
  gap: 32px;
  align-items: center;
  position: relative;
  transition: var(--transition);
}

.pricing-wide-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-hover);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 32px;
  background: var(--gold-gradient);
  color: #0b0d12;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--gold-glow);
  text-transform: uppercase;
}

.plan-info-col h3 {
  font-size: 1.5rem;
  margin-bottom: 6px;
  color: var(--gold-primary);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: 12px;
}

.currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gold-primary);
}

.price-num {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
}

.price-period {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.plan-features-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
  border-left: 1px dashed rgba(212, 175, 55, 0.2);
  border-right: 1px dashed rgba(212, 175, 55, 0.2);
  padding: 0 24px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
  font-weight: 600;
}

.feature-check {
  color: var(--gold-primary);
  font-size: 1.1rem;
}

.plan-action-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

.plan-notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* Financial & Corporate Partners Logos Bar */
.partners-section {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  padding: 30px;
  text-align: center;
}

.partners-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 24px;
  opacity: 0.85;
}

.partner-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.06);
}

.partner-logo span.icon {
  font-size: 1.3rem;
  color: var(--gold-primary);
}

/* Device Compatibility Banner */
.devices-bar {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 20px;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.device-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--gold-primary);
}

/* Articles SEO Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  box-shadow: var(--shadow-flat);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-primary);
  box-shadow: var(--shadow-hover);
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gold-primary);
  text-transform: uppercase;
}

.article-card h3 {
  font-size: 1.15rem;
  line-height: 1.4;
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--gold-primary);
  font-weight: 700;
  font-size: 0.9rem;
  margin-top: auto;
}

/* Testimonials & Case Studies */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.review-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-card);
  border: var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--gold-primary);
}

.user-meta h4 {
  font-size: 1rem;
}

.user-meta span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stars {
  color: var(--gold-primary);
  font-size: 0.9rem;
}

.review-content {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* FAQ Accordion Module */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: var(--gold-border);
  overflow: hidden;
  transition: var(--transition);
}

.faq-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.05rem;
}

.faq-toggle-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  border: var(--gold-border);
  color: var(--gold-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.faq-item.open .faq-toggle-icon {
  transform: rotate(180deg);
  background: var(--gold-primary);
  color: #0b0d12;
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-body {
  max-height: 300px;
  padding: 0 24px 20px 24px;
}

/* Money-Back Guarantee & Refund Policy Badge Component */
.guarantee-bar {
  background: linear-gradient(90deg, rgba(212,175,55,0.15) 0%, rgba(20,23,33,1) 100%);
  border: var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.guarantee-badge {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge-shield-icon {
  font-size: 2.2rem;
}

.guarantee-text h4 {
  color: var(--gold-primary);
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.guarantee-text p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* 核心任务 2: 页脚 PBN 权重输血管道 */
footer {
  margin-top: 80px;
  padding: 40px 20px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: #07080c;
}

.footer-content {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* 低调、美观、小字号的友情链接区 */
.pbn-links-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: var(--gold-border);
  width: fit-content;
}

.pbn-title {
  font-weight: 700;
  color: var(--gold-primary);
  opacity: 0.8;
}

/* 干净 dofollow 外链，包含 target="_blank"，绝对无 rel="nofollow" */
.pbn-links-area a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.pbn-links-area a:hover {
  color: var(--gold-primary);
  text-decoration: underline;
}

/* Article Subpage Layout Styles */
.article-page-body {
  max-width: 900px;
  margin: 40px auto;
  padding: 40px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  box-shadow: var(--shadow-flat);
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.article-header h1 {
  font-size: 2.25rem;
  margin-bottom: 12px;
  color: var(--gold-primary);
}

.article-meta {
  display: flex;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-main);
}

.article-content h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px 0;
  color: var(--gold-primary);
}

.article-content h3 {
  font-size: 1.2rem;
  margin: 24px 0 12px 0;
  color: var(--gold-light);
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-cta-box {
  margin: 40px 0;
  padding: 30px;
  border-radius: var(--radius-lg);
  border: var(--gold-border);
  background: var(--bg-card);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* Mobile Responsive Adaptations */
@media (max-width: 1024px) {
  .sidebar-nav {
    display: none;
  }
  
  .mobile-header {
    display: flex;
  }
  
  .main-content {
    margin-left: 0;
    padding: 84px 20px 40px 20px;
  }
  
  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pricing-wide-card {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .plan-features-col {
    border-left: none;
    border-right: none;
    border-top: 1px dashed rgba(212, 175, 55, 0.2);
    border-bottom: 1px dashed rgba(212, 175, 55, 0.2);
    padding: 20px 0;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .btn-neumorphic {
    width: 100%;
  }

  .plan-features-col {
    grid-template-columns: 1fr;
  }
  
  .article-page-body {
    padding: 24px 16px;
  }
}