/* ========== CSS Variables & Reset ========== */
:root {
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #5A4BD1;
  --accent: #00D2FF;
  --accent2: #7F5AF0;
  --bg-dark: #0A0A1A;
  --bg-card: #12122A;
  --bg-card-hover: #1A1A3E;
  --text-primary: #FFFFFF;
  --text-secondary: #B0B0D0;
  --text-muted: #6B6B8D;
  --border-color: rgba(108, 92, 231, 0.2);
  --gradient-primary: linear-gradient(135deg, #6C5CE7, #00D2FF);
  --gradient-hero: linear-gradient(160deg, #0A0A1A 0%, #1A1040 40%, #0D1B2A 100%);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.15);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-en: 'Inter', sans-serif;
  --font-cn: 'Noto Sans SC', 'Inter', sans-serif;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-cn);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Particles Canvas ========== */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: var(--transition);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.3rem;
  z-index: 10;
}

.logo-icon {
  font-size: 1.6rem;
  filter: drop-shadow(0 0 8px rgba(108, 92, 231, 0.6));
}

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

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
  background: rgba(108, 92, 231, 0.08);
}

.lang-toggle:hover {
  border-color: var(--primary);
  color: var(--text-primary);
  background: rgba(108, 92, 231, 0.15);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 10;
}

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

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 92, 231, 0.6);
}

.btn-outline {
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: var(--text-primary);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: var(--primary-light);
  background: rgba(108, 92, 231, 0.1);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* ========== Section Common ========== */
.section {
  padding: 120px 0;
  position: relative;
  z-index: 1;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #B0B0D0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 120px 60px 80px;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  z-index: 1;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(108, 92, 231, 0.12) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(0, 210, 255, 0.08) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.15);
  border: 1px solid rgba(108, 92, 231, 0.3);
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: 28px;
  animation: fadeInUp 0.8s ease;
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-title-line {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  background: linear-gradient(135deg, #FFFFFF 0%, #A29BFE 50%, #00D2FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-title-sub {
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-secondary);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-stats {
  display: flex;
  gap: 48px;
  animation: fadeInUp 0.8s ease 0.5s both;
}

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

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-suffix {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-visual {
  position: relative;
  z-index: 2;
  animation: fadeInRight 1s ease 0.3s both;
}

.hero-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16/10;
}

.hero-float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 12px;
  background: rgba(18, 18, 42, 0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-glow);
  white-space: nowrap;
}

.float-card-1 {
  top: 10%;
  right: -20px;
  animation: float 4s ease-in-out infinite;
}

.float-card-2 {
  bottom: 30%;
  left: -30px;
  animation: float 4s ease-in-out infinite 1s;
}

.float-card-3 {
  bottom: 5%;
  right: 10%;
  animation: float 4s ease-in-out infinite 2s;
}

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

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* ========== Services ========== */
.services {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0D0D25 100%);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  overflow: hidden;
}

.service-card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(108, 92, 231, 0.4);
  box-shadow: var(--shadow-glow);
}

.service-card:hover .service-card-glow {
  opacity: 1;
}

.service-card.featured {
  border-color: rgba(108, 92, 231, 0.4);
  background: linear-gradient(180deg, rgba(108, 92, 231, 0.08) 0%, var(--bg-card) 100%);
}

.service-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(108, 92, 231, 0.2);
  font-size: 0.75rem;
  color: var(--primary-light);
  font-weight: 600;
}

.service-icon-wrap {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 24px;
}

.service-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

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

.service-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.service-features {
  margin-bottom: 20px;
}

.service-features li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.service-features li:last-child {
  border-bottom: none;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}

.service-link:hover {
  color: var(--primary-light);
  letter-spacing: 1px;
}

/* ========== About ========== */
.about {
  background: linear-gradient(180deg, #0D0D25 0%, var(--bg-dark) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.about-experience {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--gradient-primary);
  border-radius: var(--radius);
  padding: 24px 32px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(108, 92, 231, 0.4);
}

.exp-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.exp-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 4px;
}

.about-content .section-tag {
  text-align: left;
}

.about-content .section-title {
  text-align: left;
}

.about-text {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
}

.highlight-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(108, 92, 231, 0.06);
  border: 1px solid rgba(108, 92, 231, 0.1);
  transition: var(--transition);
}

.highlight-item:hover {
  background: rgba(108, 92, 231, 0.12);
  border-color: rgba(108, 92, 231, 0.25);
  transform: translateY(-2px);
}

.highlight-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.highlight-item strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.highlight-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========== Advantages ========== */
.advantages {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0D0D25 100%);
}

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

.adv-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.adv-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.4s;
  transform-origin: left;
}

.adv-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: var(--shadow-glow);
}

.adv-card:hover::before {
  transform: scaleX(1);
}

.adv-number {
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  margin-bottom: 16px;
  line-height: 1;
}

.adv-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.adv-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Cases ========== */
.cases {
  background: linear-gradient(180deg, #0D0D25 0%, var(--bg-dark) 100%);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: var(--shadow-glow);
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.case-industry {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.case-tag {
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(0, 210, 255, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
}

.case-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.case-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.case-metrics {
  display: flex;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.metric {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ========== Tech Stack Marquee ========== */
.tech-stack {
  background: var(--bg-dark);
  padding: 80px 0;
}

.tech-marquee {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.tech-track {
  display: flex;
  gap: 20px;
  animation: marquee 30s linear infinite;
  width: max-content;
}

.tech-item {
  flex-shrink: 0;
  padding: 12px 28px;
  border-radius: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition);
}

.tech-item:hover {
  border-color: var(--primary);
  color: var(--text-primary);
  background: rgba(108, 92, 231, 0.1);
}

/* ========== Contact ========== */
.contact {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0D0D25 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info .section-tag,
.contact-info .section-title {
  text-align: left;
}

.contact-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background: rgba(108, 92, 231, 0.06);
  border: 1px solid rgba(108, 92, 231, 0.1);
}

.contact-icon {
  font-size: 1.5rem;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.contact-item a,
.contact-item span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-item a:hover {
  color: var(--accent);
}

.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23B0B0D0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

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

/* ========== Footer ========== */
.footer {
  background: #060612;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-slogan {
  margin-left: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-email {
  color: var(--text-secondary);
}

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(108, 92, 231, 0.6);
}

/* ========== Animations ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  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(-12px); }
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.4; }
  50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* AOS-like scroll animation */
[data-aos] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

[data-aos][data-aos-delay="80"] { transition-delay: 80ms; }
[data-aos][data-aos-delay="100"] { transition-delay: 100ms; }
[data-aos][data-aos-delay="160"] { transition-delay: 160ms; }
[data-aos][data-aos-delay="200"] { transition-delay: 200ms; }
[data-aos][data-aos-delay="240"] { transition-delay: 240ms; }
[data-aos][data-aos-delay="320"] { transition-delay: 320ms; }
[data-aos][data-aos-delay="400"] { transition-delay: 400ms; }

/* ========== Toast Notification ========== */
.toast {
  position: fixed;
  top: 90px;
  right: 32px;
  padding: 16px 28px;
  border-radius: var(--radius-sm);
  background: rgba(18, 18, 42, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(108, 92, 231, 0.3);
  color: var(--text-primary);
  font-size: 0.92rem;
  z-index: 9999;
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-glow);
}

.toast.show {
  transform: translateX(0);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 120px 32px 60px;
    gap: 40px;
  }

  .hero-content { max-width: 100%; }
  .hero-title-line { font-size: 2.8rem; }
  .hero-visual { max-width: 600px; margin: 0 auto; }

  .services-grid,
  .advantages-grid,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-links .nav-link {
    font-size: 1.2rem;
  }

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

  .hero {
    padding: 100px 20px 40px;
    min-height: auto;
  }

  .hero-title-line { font-size: 2.2rem; }
  .hero-title-sub { font-size: 1.1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-actions { flex-direction: column; }
  .hero-float-card { display: none; }

  .section { padding: 80px 0; }
  .section-title { font-size: 2rem; }

  .services-grid,
  .advantages-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .about-experience {
    right: 10px;
    bottom: -10px;
    padding: 16px 24px;
  }

  .footer-top {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .contact-form-wrap {
    padding: 28px 20px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}