/* ===== 湖南汉拓物联科技有限公司 - 主样式 ===== */

/* 重置与基础 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #5b21b6;
  --accent: #f59e0b;
  --accent-light: #fcd34d;
  --bg-dark: #0f0c1a;
  --bg-card: #1a1630;
  --bg-card2: #221e38;
  --text-main: #f1f0f7;
  --text-sub: #b8b3d8;
  --text-muted: #6b6587;
  --border: rgba(124,58,237,0.25);
  --gradient-hero: linear-gradient(135deg, #0f0c1a 0%, #1a0c38 50%, #0f0c1a 100%);
  --gradient-primary: linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-accent: linear-gradient(135deg, #f59e0b, #fcd34d);
  --shadow-card: 0 8px 32px rgba(124,58,237,0.18);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 通用 ===== */
a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--accent-light); }

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-tag {
  display: inline-block;
  background: rgba(124,58,237,0.18);
  color: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 4px 16px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
  max-width: 580px;
  margin: 0 auto 48px;
  line-height: 1.75;
}

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

/* ===== 导航 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(15,12,26,0.96);
  box-shadow: 0 2px 24px rgba(0,0,0,0.4);
  backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-cn {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.nav-logo-en {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-cta {
  background: var(--gradient-primary);
  color: #fff !important;
  padding: 9px 22px;
  border-radius: 99px;
  font-weight: 600 !important;
  font-size: 0.88rem !important;
  transition: opacity var(--transition), transform var(--transition) !important;
}

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

.nav-cta:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  color: #fff !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
}

.hero-bg-glow.g1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #7c3aed, transparent);
  top: -100px; left: -100px;
}

.hero-bg-glow.g2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #a855f7, transparent);
  bottom: -80px; right: 10%;
}

.hero-bg-glow.g3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, #f59e0b, transparent);
  top: 30%; right: 20%;
  opacity: 0.15;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 24px;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(124,58,237,0.15);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 6px 16px;
  font-size: 0.82rem;
  color: var(--primary-light);
  margin-bottom: 24px;
  font-weight: 500;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-main);
}

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

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

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 99px;
  padding: 13px 28px;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), opacity var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(124,58,237,0.55);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  background: rgba(124,58,237,0.08);
}

.hero-stats {
  display: flex;
  gap: 36px;
}

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

.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 手机截图展示 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-mockup-group {
  position: relative;
  height: 560px;
  width: 340px;
}

.phone-mockup {
  position: absolute;
  background: #1a1630;
  border-radius: 40px;
  border: 2px solid rgba(124,58,237,0.4);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
  overflow: hidden;
  transition: transform var(--transition);
}

.phone-mockup:hover { transform: scale(1.02) translateY(-4px); }

.phone-mockup img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.phone-main {
  width: 200px;
  height: 420px;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  border-radius: 36px;
}

.phone-left {
  width: 155px;
  height: 330px;
  top: 110px;
  left: -10px;
  z-index: 2;
  transform: rotate(-8deg);
  border-radius: 30px;
  opacity: 0.85;
}

.phone-right {
  width: 155px;
  height: 330px;
  top: 110px;
  right: -10px;
  z-index: 2;
  transform: rotate(8deg);
  border-radius: 30px;
  opacity: 0.85;
}

/* ===== 关于公司 ===== */
.section-about {
  padding: 100px 0;
  background: var(--bg-dark);
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-content {}

.about-tag {
  display: inline-block;
  background: rgba(124,58,237,0.12);
  color: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 4px 16px;
  margin-bottom: 16px;
}

.about-title {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

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

.about-text {
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 16px;
}

.about-values {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-value-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color var(--transition), transform var(--transition);
}

.about-value-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
}

.about-value-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.about-value-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.about-value-desc {
  font-size: 0.84rem;
  color: var(--text-sub);
}

.about-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-primary);
}

.about-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.about-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-card-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== APP产品 ===== */
.section-app {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 50%, var(--bg-dark) 100%);
  position: relative;
}

.app-hero-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 60px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-bottom: 64px;
}

.app-hero-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, rgba(124,58,237,0.12), transparent 60%);
  pointer-events: none;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: 99px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 600;
}

.app-name {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 12px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-tagline {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 28px;
}

.app-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.app-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.app-feature-list li::before {
  content: '✦';
  color: var(--primary-light);
  font-size: 0.7rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.app-screenshots {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  position: relative;
}

.app-screen-item {
  background: var(--bg-card);
  border-radius: 28px;
  border: 2px solid rgba(124,58,237,0.3);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
  transition: transform var(--transition), box-shadow var(--transition);
}

.app-screen-item:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 50px rgba(124,58,237,0.25);
}

.app-screen-item img {
  width: 130px;
  display: block;
}

.app-screen-item.main-screen img {
  width: 160px;
}

/* 功能特色 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, rgba(124,58,237,0.08), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

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

.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.25);
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 0.86rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== 截图画廊 ===== */
.section-gallery {
  padding: 100px 0;
  background: var(--bg-dark);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.gallery-item {
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 16px 40px rgba(124,58,237,0.2);
}

.gallery-item img {
  width: 100%;
  display: block;
}

.gallery-item-caption {
  padding: 14px 18px;
  font-size: 0.85rem;
  color: var(--text-sub);
  font-weight: 500;
  text-align: center;
}

/* ===== 联系 ===== */
.section-contact {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-dark), #160d2e);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info {}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.contact-info-desc {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 32px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.contact-item:hover { border-color: var(--primary-light); }

.contact-item-icon {
  width: 40px; height: 40px;
  background: rgba(124,58,237,0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
}

/* 联系表单 */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
}

.form-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 7px;
}

.form-input,
.form-textarea {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.92rem;
  padding: 11px 14px;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  width: 100%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 99px;
  padding: 13px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}

.form-submit:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* ===== 页脚 ===== */
.footer {
  background: #0a0814;
  border-top: 1px solid rgba(124,58,237,0.15);
  padding: 56px 0 0;
}

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

.footer-brand-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.footer-brand-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.footer-brand-desc {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.75;
  max-width: 300px;
}

.footer-col-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.84rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom-left {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom-right {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-bottom-right a {
  color: var(--text-muted);
}

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

/* ===== 灯箱 ===== */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(8px);
}

.lightbox-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 20px;
  box-shadow: 0 20px 80px rgba(0,0,0,0.6);
}

.lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.lightbox-close:hover { background: rgba(255,255,255,0.2); }

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 60px 24px;
  }
  .hero-subtitle { margin: 0 auto 36px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { order: -1; }
  .phone-mockup-group { height: 380px; width: 240px; }
  .phone-main { width: 150px; height: 310px; }
  .phone-left, .phone-right { width: 115px; height: 240px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .app-hero-card { grid-template-columns: 1fr; gap: 32px; padding: 36px 28px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: rgba(15,12,26,0.98);
    padding: 24px;
    gap: 24px;
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    z-index: 999;
  }
  .gallery-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
}