/* =========================================
   balabalabala Landing Page - Bang-for-Buck Style
   废话让AI写，价格我们来卷
   ========================================= */

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

:root {
  /* 主色调 - 热情橙红（便宜/促销/卷王的感觉） */
  --primary-50: #fff7ed;
  --primary-100: #ffedd5;
  --primary-200: #fed7aa;
  --primary-300: #fdba74;
  --primary-400: #fb923c;
  --primary-500: #f97316;
  --primary-600: #ea580c;
  --primary-700: #c2410c;
  --primary-800: #9a3412;
  --primary-900: #7c2d12;

  /* 辅助色 - 亮红 */
  --accent-400: #f87171;
  --accent-500: #ef4444;
  --accent-600: #dc2626;

  /* 中性色 */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-850: #172033;
  --gray-900: #0f172a;
  --gray-950: #020617;

  /* 语义色 */
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* 字体 */
  --font-sans: 'Public Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* 圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.2);

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--gray-950);
  color: var(--gray-100);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  background: transparent;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.375rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.logo-text {
  background: linear-gradient(135deg, #fff 0%, #fed7aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-400);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--gray-100);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: #fff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1.25rem;
  height: 2px;
  background: var(--primary-500);
  border-radius: 1px;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-ghost {
  background: transparent;
  color: var(--gray-300);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 1px 3px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
  transform: translateY(-1px);
}

/* Hero Buttons */
.btn-hero {
  padding: 0.875rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  color: #fff;
  border-radius: var(--radius-lg);
  border: none;
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
  transition: all var(--transition-normal);
}

.btn-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(249, 115, 22, 0.45);
}

.btn-hero-ghost {
  padding: 0.875rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  color: var(--gray-200);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.btn-hero-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  transform: translateY(-2px);
}

/* CTA Buttons */
.btn-cta {
  padding: 0.875rem 2.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-600));
  color: #fff;
  border-radius: var(--radius-lg);
  border: none;
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.35);
  transition: all var(--transition-normal);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(249, 115, 22, 0.5);
}

.btn-cta-ghost {
  padding: 0.875rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  color: var(--gray-200);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all var(--transition-normal);
}

.btn-cta-ghost:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  transform: translateY(-2px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--gray-300);
  cursor: pointer;
  padding: 0.5rem;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 70%;
  background: radial-gradient(ellipse, rgba(249, 115, 22, 0.12) 0%, transparent 70%);
  pointer-events: none;
  animation: glow-pulse 8s ease-in-out infinite;
}

.hero-glow-2 {
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 60%;
  height: 70%;
  background: radial-gradient(ellipse, rgba(239, 68, 68, 0.1) 0%, transparent 70%);
  pointer-events: none;
  animation: glow-pulse 10s ease-in-out infinite reverse;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
  pointer-events: none;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* Hero Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary-300);
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.2);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

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

/* Hero Title */
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #fff;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-400), var(--accent-500), #f97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hero Subtitle */
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-400);
  line-height: 1.7;
  max-width: 600px;
}

.highlight-text {
  color: var(--primary-400);
  font-weight: 700;
}

/* Hero CTA */
.hero-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 2.5rem;
  padding: 1.5rem 2.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.stat-highlight {
  color: var(--primary-500);
  font-size: 1.8rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.08);
}

/* ---------- Section Common ---------- */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-400);
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.15);
  border-radius: 100px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--gray-400);
  max-width: 500px;
  margin: 0 auto;
}

/* ---------- Models Section ---------- */
.models {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.model-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.model-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.model-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.model-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.icon-openai { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.icon-claude { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.icon-deepseek { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.icon-gemini { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }
.icon-grok { background: rgba(236, 72, 153, 0.15); color: #f472b6; }
.icon-more { background: rgba(148, 163, 184, 0.15); color: #94a3b8; }

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--gray-400);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

/* 模型卡片标签 + 价格 */
.card-tags {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.tag-hot { color: #fff; background: linear-gradient(135deg, #f97316, #ef4444); }
.tag-pop { color: #fff; background: linear-gradient(135deg, #8b5cf6, #6366f1); }
.tag-cheap { color: #fff; background: linear-gradient(135deg, #10b981, #059669); }
.tag-free { color: #fff; background: linear-gradient(135deg, #f59e0b, #d97706); }
.tag-normal { color: var(--gray-300); background: rgba(255, 255, 255, 0.08); }
.tag-soon { color: var(--gray-300); background: rgba(255, 255, 255, 0.06); border: 1px dashed rgba(255, 255, 255, 0.15); }

.price {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-400);
  white-space: nowrap;
}

/* ---------- 价格对比表 ---------- */
.price-compare {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.compare-table-wrapper {
  max-width: 800px;
  margin: 0 auto;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.02);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.compare-table th {
  padding: 1rem 1.5rem;
  text-align: left;
  font-weight: 600;
  color: var(--gray-400);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.compare-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--gray-200);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.price-old {
  color: var(--gray-500);
  text-decoration: line-through;
}

.price-new {
  color: var(--success);
  font-weight: 600;
}

.saving {
  color: var(--primary-400);
  font-weight: 600;
}

/* ---------- 品牌理念 ---------- */
.philosophy {
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}

.philosophy::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(249, 115, 22, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.philosophy-content {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.philosophy-text {
  font-size: 1.05rem;
  color: var(--gray-300);
  line-height: 1.9;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.philosophy-text strong {
  color: var(--primary-300);
  font-weight: 600;
}

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

.philosophy-motto {
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff !important;
  padding: 1.5rem;
  border: 1px solid rgba(249, 115, 22, 0.15);
  border-radius: var(--radius-xl);
  background: rgba(249, 115, 22, 0.05);
  line-height: 1.8 !important;
}

/* ---------- CTA background color update ---------- */
.cta-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(249, 115, 22, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 50%, rgba(239, 68, 68, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.card-status {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
}

.status-ok {
  color: var(--success);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.status-soon {
  color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ---------- Features Section ---------- */
.features {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.feature-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-lg);
  background: rgba(249, 115, 22, 0.1);
  color: var(--primary-400);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.625rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--gray-400);
  line-height: 1.7;
}

/* ---------- CTA Section ---------- */
.cta-section {
  position: relative;
  padding: 6rem 2rem;
  text-align: center;
  overflow: hidden;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--gray-400);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 4rem 2rem 2rem;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 4rem;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--gray-200);
}

.footer-bottom {
  max-width: 1280px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray-600);
}

/* ---------- Animations ---------- */
.animate-ready {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-ready.visible {
  opacity: 1;
  transform: translateY(0);
}

.model-card:nth-child(1) { transition-delay: 0ms; }
.model-card:nth-child(2) { transition-delay: 50ms; }
.model-card:nth-child(3) { transition-delay: 100ms; }
.model-card:nth-child(4) { transition-delay: 150ms; }
.model-card:nth-child(5) { transition-delay: 200ms; }
.model-card:nth-child(6) { transition-delay: 250ms; }

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

@media (max-width: 768px) {
  .navbar {
    padding: 0 1rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 1rem;
    gap: 0.25rem;
  }

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

  .nav-link {
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .nav-actions {
    display: none;
  }

  .nav-actions.open {
    display: flex;
    padding: 0 1rem 1rem;
    position: absolute;
    top: 12rem;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    min-height: 90vh;
    padding: 5rem 1rem 3rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
  }

  .stat-divider {
    width: 2rem;
    height: 1px;
  }

  .models,
  .features {
    padding: 4rem 1rem;
  }

  .models-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 2rem;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn-hero,
  .btn-hero-ghost {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.5rem;
  }
}