/* ============================================
   通信+ 官方网站 - 全局样式
   科技蓝高端企业风格
   ============================================ */

/* CSS Variables - 科技蓝配色体系 */
:root {
  /* 主色 */
  --primary-blue: #0a5cff;
  --primary-dark: #0646c8;
  --primary-light: #3d7aff;
  --primary-bg: #f0f5ff;
  
  /* 辅助色 */
  --accent-cyan: #00d4ff;
  --accent-gold: #ffa940;
  --success-green: #52c41a;
  --danger-red: #ff4d4f;
  
  /* 中性色 */
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-light: #718096;
  --text-white: #ffffff;
  
  /* 背景色 */
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-dark: #0a1628;
  --bg-gradient: linear-gradient(135deg, #0a1628 0%, #1a2744 50%, #0d2137 100%);
  
  /* 渐变 */
  --gradient-blue: linear-gradient(135deg, #0a5cff 0%, #00d4ff 100%);
  --gradient-dark: linear-gradient(180deg, #0a1628 0%, #162544 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.95) 0%, rgba(240,245,255,0.9) 100%);
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(10, 92, 255, 0.08);
  --shadow-md: 0 4px 20px rgba(10, 92, 255, 0.12);
  --shadow-lg: 0 8px 40px rgba(10, 92, 255, 0.15);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 30px rgba(10, 92, 255, 0.3);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  
  /* 字体 */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

/* Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Section Base */
.section {
  padding: 100px 0;
  position: relative;
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-white);
}

.section-light {
  background: var(--bg-light);
}

.section-gradient {
  background: var(--bg-gradient);
  color: var(--text-white);
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-title .highlight {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
  line-height: 1.8;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Navigation - 导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  padding: 14px 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 800;
  color: var(--text-white);
}

.nav-logo img {
  height: 44px;
  width: auto;
}

.nav-logo span {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-blue);
  transition: var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  padding: 12px 28px;
  background: var(--gradient-blue);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-white) !important;
  transition: var(--transition-normal);
  box-shadow: 0 4px 20px rgba(10, 92, 255, 0.4);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(10, 92, 255, 0.5);
}

.nav-cta::after {
  display: none !important;
}

/* Portal入口高亮 */
.nav-highlight {
  background: linear-gradient(135deg, #f59e0b, #d97706) !important;
  color: #fff !important;
  border-radius: 20px;
  font-weight: 700;
  padding: 8px 18px !important;
}
.nav-highlight:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(245,158,11,0.4);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text-white);
  transition: var(--transition-normal);
  border-radius: 2px;
}

/* ============================================
   Hero Section - 首屏
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-dark);
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 22, 40, 0.7) 0%,
    rgba(10, 22, 40, 0.85) 50%,
    rgba(10, 22, 40, 0.95) 100%
  );
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-content {
  animation: fadeInUp 1s ease forwards;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(10, 92, 255, 0.15);
  border: 1px solid rgba(10, 92, 255, 0.3);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-white);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

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

.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 520px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 34px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
  font-family: var(--font-family);
}

.btn-primary {
  background: var(--gradient-blue);
  color: var(--text-white);
  box-shadow: 0 4px 25px rgba(10, 92, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 35px rgba(10, 92, 255, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.45);
  transform: translateY(-3px);
}

.btn-white {
  background: var(--bg-white);
  color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-number .unit {
  font-size: 20px;
  color: var(--accent-cyan);
  margin-left: 4px;
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease 0.3s both;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.hero-image-wrapper img {
  width: 100%;
  height: 550px;
  object-fit: cover;
}

.hero-image-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid rgba(10, 92, 255, 0.3);
  border-radius: var(--radius-xl);
  z-index: 1;
  pointer-events: none;
}

/* Floating Elements */
.floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-lg);
  animation: float 6s ease-in-out infinite;
  z-index: 2;
}

.floating-card.card-1 {
  top: 40px;
  right: -30px;
  animation-delay: 0s;
}

.floating-card.card-2 {
  bottom: 60px;
  left: -30px;
  animation-delay: 2s;
}

.floating-card .card-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 10px;
}

.floating-card .card-label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 2px;
}

.floating-card .card-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

/* ============================================
   Cards & Components
   ============================================ */

/* Feature Card */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition-normal);
  border: 1px solid rgba(10, 92, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-blue);
  opacity: 0;
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(10, 92, 255, 0.15);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 24px;
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
  background: var(--gradient-blue);
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* Mode Card (合作模式) */
.mode-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  border: 1px solid rgba(10, 92, 255, 0.08);
  position: relative;
}

.mode-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(10, 92, 255, 0.2);
}

.mode-header {
  padding: 32px;
  background: var(--gradient-dark);
  color: var(--text-white);
  position: relative;
  overflow: hidden;
}

.mode-header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(10, 92, 255, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.mode-number {
  font-size: 48px;
  font-weight: 900;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}

.mode-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.mode-header h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.mode-header p {
  font-size: 14px;
  opacity: 0.75;
}

.mode-body {
  padding: 32px;
}

.mode-benefits {
  margin-bottom: 24px;
}

.mode-benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #f0f0f0;
}

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

.benefit-check {
  width: 22px;
  height: 22px;
  min-width: 22px;
  background: rgba(82, 196, 26, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success-green);
  font-size: 13px;
  margin-top: 2px;
}

.mode-benefit-item span {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.mode-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 20px;
}

.mode-price .price-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-blue);
}

.mode-price .price-unit {
  font-size: 14px;
  color: var(--text-light);
}

.mode-price .price-note {
  font-size: 13px;
  color: var(--success-green);
  font-weight: 500;
}

/* Product Card */
.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  border: 1px solid rgba(10, 92, 255, 0.08);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.08);
}

.product-image .product-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 22, 40, 0.8), transparent);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: var(--transition-normal);
}

.product-card:hover .product-overlay {
  opacity: 1;
}

.product-info {
  padding: 28px;
}

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

.product-info p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-price {
  display: flex;
  align-items: center;
  gap: 12px;
}

.price-tag {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-blue);
}

.price-commission {
  font-size: 13px;
  color: var(--success-green);
  background: rgba(82, 196, 26, 0.1);
  padding: 4px 12px;
  border-radius: 50px;
  font-weight: 600;
}

/* ============================================
   Forms - 表单样式
   ============================================ */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e8ecf1;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--bg-white);
  transition: var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 4px rgba(10, 92, 255, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* Calculator Styles */
.calculator-container {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  max-width: 720px;
  margin: 0 auto;
}

.calculator-result {
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 32px;
  text-align: center;
  border: 2px solid rgba(10, 92, 255, 0.15);
}

.result-number {
  font-size: 52px;
  font-weight: 900;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.result-label {
  font-size: 16px;
  color: var(--text-secondary);
}

.result-breakdown {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(10, 92, 255, 0.1);
}

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

.breakdown-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.breakdown-label {
  font-size: 12px;
  color: var(--text-light);
}

/* ============================================
   Team Section
   ============================================ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.team-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  border: 1px solid rgba(10, 92, 255, 0.08);
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.team-photo {
  height: 320px;
  overflow: hidden;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.team-card:hover .team-photo img {
  transform: scale(1.05);
}

.team-info {
  padding: 24px;
  text-align: center;
}

.team-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  font-size: 14px;
  color: var(--primary-blue);
  font-weight: 500;
  margin-bottom: 12px;
}

.team-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ============================================
   Contact / Footer
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.contact-icon {
  width: 52px;
  height: 52px;
  min-width: 52px;
  background: var(--primary-bg);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.contact-detail h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

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

.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(10, 92, 255, 0.3); }
  50% { box-shadow: 0 0 40px rgba(10, 92, 255, 0.5); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content {
    order: 1;
  }
  
  .hero-visual {
    order: 2;
    max-width: 560px;
    margin: 0 auto;
  }
  
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-title {
    font-size: 42px;
  }
  
  .floating-card {
    display: none;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-link {
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .section {
    padding: 70px 0;
  }
  
  .section-title {
    font-size: 32px;
  }
  
  .hero-title {
    font-size: 34px;
  }
  
  .hero-stats {
    flex-wrap: wrap;
    gap: 28px;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .calculator-container {
    padding: 28px 20px;
  }
  
  .result-number {
    font-size: 38px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  
  .mode-grid {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .btn {
    padding: 14px 26px;
    font-size: 14px;
  }
  
  .hero-title {
    font-size: 28px;
  }
  
  .stat-number {
    font-size: 30px;
  }
}