/* ===== 餐饮系统官网 - 橙色主题 ===== */
:root {
  --primary: #FF6B00;
  --primary-dark: #E55A00;
  --primary-light: #FF8533;
  --primary-bg: #FFF5EE;
  --primary-gradient: linear-gradient(135deg, #FF6B00 0%, #FF9500 100%);
  --text-primary: #1A1A2E;
  --text-secondary: #666680;
  --text-light: #9999AA;
  --bg-white: #FFFFFF;
  --bg-gray: #F7F8FA;
  --border: #E8E8EF;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(255,107,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --header-height: 72px;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

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

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

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

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-group a.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-group img.logo-img {
  width: 130px;
  height: auto;
}

.logo-group .brand-name {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
  line-height: 1;
  white-space: nowrap;
}

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

.nav-link {
  padding: 8px 20px;
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover { color: var(--primary); }

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.btn-demo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 24px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(255,107,0,0.3);
  white-space: nowrap;
}

.btn-demo:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,107,0,0.4);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

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

/* ===== Hero ===== */
.hero {
  padding: calc(var(--header-height) + 80px) 0 48px;
  background: linear-gradient(180deg, var(--primary-bg) 0%, var(--bg-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,107,0,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255,107,0,0.1);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 24px;
}

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

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

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title span { color: var(--primary); }

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 28px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(255,107,0,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,0,0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 28px;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: all var(--transition);
}

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

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual::before {
  content: '';
  position: absolute;
  width: 90%;
  height: 90%;
  background: radial-gradient(circle, rgba(255,107,0,0.1) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.hero-banner-img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 580px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(255,107,0,0.2));
  animation: heroFloat 5s ease-in-out infinite;
}

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

.hero-mockup {
  width: 100%;
  max-width: 480px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  position: relative;
}

.hero-mockup-header {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.hero-mockup-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}

.hero-mockup-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.hero-mockup-item {
  aspect-ratio: 1;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-mockup-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.hero-mockup-item svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
  flex-shrink: 0;
}

.hero-mockup-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.hero-mockup-item:nth-child(1) { background: linear-gradient(135deg, #FFF0E6, #FFE0CC); }
.hero-mockup-item:nth-child(1) svg { color: #E55A00; }
.hero-mockup-item:nth-child(2) { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); }
.hero-mockup-item:nth-child(2) svg { color: #2E7D32; }
.hero-mockup-item:nth-child(3) { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); }
.hero-mockup-item:nth-child(3) svg { color: #1565C0; }
.hero-mockup-item:nth-child(4) { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); }
.hero-mockup-item:nth-child(4) svg { color: #7B1FA2; }
.hero-mockup-item:nth-child(5) { background: linear-gradient(135deg, #FFF8E1, #FFECB3); }
.hero-mockup-item:nth-child(5) svg { color: #F57F17; }
.hero-mockup-item:nth-child(6) { background: linear-gradient(135deg, #E0F7FA, #B2EBF2); }
.hero-mockup-item:nth-child(6) svg { color: #00838F; }

/* ===== Stats ===== */
.stats {
  padding: 32px 0 40px;
  background: var(--bg-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  text-align: center;
  padding: 16px 12px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.stat-item:hover {
  background: var(--primary-bg);
  transform: translateY(-4px);
}

.stat-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 8px;
  background: rgba(255,107,0,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
}

.stat-number {
  font-size: 38px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== Section ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

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

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

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

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

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.feature-card:hover .feature-icon {
  background: rgba(255,107,0,0.15);
  transform: scale(1.05);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.arch-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  border: 2px solid transparent;
}

.arch-card:hover {
  border-color: var(--primary);
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
}

.arch-icon {
  width: 72px; height: 72px;
  margin: 0 auto 20px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(255,107,0,0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}

.arch-icon svg {
  width: 32px;
  height: 32px;
  color: #fff;
}

.arch-card:hover .arch-icon {
  transform: scale(1.08);
  box-shadow: 0 12px 28px rgba(255,107,0,0.35);
}

.arch-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.arch-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
  padding: 80px 0;
  background: var(--primary-gradient);
  text-align: center;
  color: #fff;
}

.cta h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: #fff;
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  border-radius: 28px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* ===== Footer ===== */
.footer {
  padding: 60px 0 32px;
  background: #1A1A2E;
  color: rgba(255,255,255,0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 16px;
}

.footer .logo-group .brand-name,
.footer .logo-group .brand-cloud {
  color: #fff;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1;
  white-space: nowrap;
}

.footer .logo-group .logo-icon-img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
}

.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links li { margin-bottom: 12px; }

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.footer-bottom a { color: var(--primary-light); }

/* ===== Feature Detail Page ===== */
.page-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  background: linear-gradient(180deg, var(--primary-bg) 0%, var(--bg-white) 100%);
  text-align: center;
}

.page-hero h1 {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.feature-block {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.feature-block:last-child { border-bottom: none; }

.feature-block:nth-child(even) { background: var(--bg-gray); }

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }

.feature-text .feature-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 16px;
}

.feature-text h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}

.feature-text h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
}

.feature-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.feature-list {
  margin-top: 20px;
}

.feature-list li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.feature-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature-img-wrap {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 4/3;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}

.feature-img-wrap svg {
  width: 80%;
  height: 80%;
}

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding: 60px 0 100px;
}

.pricing-card {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

.pricing-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 20px;
  background: var(--primary-gradient);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 12px;
}

.pricing-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.pricing-price small {
  font-size: 18px;
  font-weight: 500;
}

.pricing-note {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 32px;
  min-height: 20px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding-left: 24px;
  position: relative;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.pricing-btn {
  display: block;
  width: 100%;
  padding: 14px;
  background: var(--bg-gray);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 28px;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}

.pricing-card.featured .pricing-btn,
.pricing-btn:hover {
  background: var(--primary-gradient);
  color: #fff;
  border-color: transparent;
}

/* ===== Guide Page ===== */
.guide-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  padding: 40px 0 100px;
  min-height: calc(100vh - var(--header-height) - 200px);
}

.guide-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
}

.guide-sidebar h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

.guide-nav li { margin-bottom: 4px; }

.guide-nav a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.guide-nav a:hover,
.guide-nav a.active {
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 600;
}

.guide-content {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px;
  min-height: 500px;
}

.guide-content h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
}

.guide-content .guide-meta {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.guide-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
  color: var(--text-primary);
}

.guide-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.guide-content .placeholder-box,
.placeholder-box {
  padding: 48px 24px;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--text-light);
  margin: 24px 0;
  border: 2px dashed var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.guide-articles {
  display: grid;
  gap: 16px;
}

.guide-article-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--bg-gray);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  border: 1px solid transparent;
}

.guide-article-card:hover {
  border-color: var(--primary-light);
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
}

.guide-article-icon {
  width: 48px; height: 48px;
  background: var(--primary-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition);
}

.guide-article-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.guide-article-card:hover .guide-article-icon {
  background: rgba(255,107,0,0.15);
}


.placeholder-box-icon svg {
  width: 40px;
  height: 40px;
  color: var(--text-light);
  opacity: 0.5;
}

.placeholder-box small {
  font-size: 13px;
  color: var(--text-light);
}

.guide-article-info h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.guide-article-info p {
  font-size: 13px;
  color: var(--text-light);
  margin: 0;
}

.guide-article-arrow {
  margin-left: auto;
  color: var(--primary);
  font-size: 20px;
  flex-shrink: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin: 0 auto 36px; }
  .hero-actions { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-banner-img { max-width: 420px; }
  .hero-title { font-size: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .arch-grid { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 40px; }
  .feature-row.reverse { direction: ltr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .guide-layout { grid-template-columns: 1fr; }
  .guide-sidebar { position: static; }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 12px;
    font-size: 16px;
  }

  .menu-toggle { display: flex; }
  .menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .logo-group .brand-name { font-size: 17px; }
  .hero-mockup-label { font-size: 10px; }
  .hero-mockup-item svg { width: 28px; height: 28px; }
  .hero-banner-img { max-width: 360px; }
  .logo-group img.logo-img { width: 100px; }

  .hero { padding: calc(var(--header-height) + 40px) 0 32px; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 16px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats { padding: 24px 0 32px; }
  .stat-item { padding: 12px 8px; }
  .stat-number { font-size: 30px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-text h2 { font-size: 26px; }
  .page-hero h1 { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .btn-demo { padding: 8px 16px; font-size: 14px; }
  .guide-content { padding: 24px; }
  .pricing-price { font-size: 36px; }
  .cta h2 { font-size: 28px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}