/* ============================================================
   閿愯绉戞妧 RuiJian Tech - Landing Page Stylesheet
   Primary: Indigo (#4F46E5)
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --clr-primary: #4F46E5;
  --clr-primary-dark: #4338CA;
  --clr-primary-light: #6366F1;
  --clr-primary-50: #EEF2FF;
  --clr-primary-100: #E0E7FF;
  --clr-primary-200: #C7D2FE;
  --clr-primary-300: #A5B4FC;
  --clr-primary-400: #818CF8;
  --clr-primary-500: #6366F1;
  --clr-primary-600: #4F46E5;
  --clr-primary-700: #4338CA;
  --clr-primary-800: #3730A3;
  --clr-primary-900: #312E81;
  --clr-gray-50: #F9FAFB;
  --clr-gray-100: #F3F4F6;
  --clr-gray-200: #E5E7EB;
  --clr-gray-300: #D1D5DB;
  --clr-gray-400: #9CA3AF;
  --clr-gray-500: #6B7280;
  --clr-gray-600: #4B5563;
  --clr-gray-700: #374151;
  --clr-gray-800: #1F2937;
  --clr-gray-900: #111827;
  --clr-white: #FFFFFF;
  --clr-black: #0A0A0A;
  --clr-success: #10B981;
  --clr-warning: #F59E0B;

  --font-body: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Noto Sans SC', 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --navbar-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--clr-gray-800);
  background-color: var(--clr-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* ---------- Section Headers ---------- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--clr-primary-600);
  background: var(--clr-primary-50);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--clr-gray-900);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--clr-gray-500);
  line-height: 1.75;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-primary {
  background: var(--clr-primary-600);
  color: var(--clr-white);
  border-color: var(--clr-primary-600);
}

.btn-primary:hover {
  background: var(--clr-primary-700);
  border-color: var(--clr-primary-700);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--clr-gray-700);
  border-color: var(--clr-gray-300);
}

.btn-outline:hover {
  border-color: var(--clr-primary-400);
  color: var(--clr-primary-600);
  background: var(--clr-primary-50);
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.97);
  border-bottom-color: var(--clr-gray-100);
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-primary-400));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-white);
  font-size: 1.2rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--clr-gray-900);
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--clr-gray-400);
  letter-spacing: 0.08em;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-gray-600);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-primary-600);
  transition: width var(--transition);
  border-radius: 1px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--clr-primary-600);
}

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

.nav-cta {
  font-size: 0.85rem;
  padding: 10px 22px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--clr-gray-800);
  border-radius: 3px;
  transition: all var(--transition);
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--navbar-height);
}

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

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.35) saturate(0.7);
  transform: scale(1.05);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(160deg,
    rgba(79, 70, 229, 0.85) 0%,
    rgba(55, 48, 163, 0.75) 40%,
    rgba(17, 24, 39, 0.82) 100%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: var(--clr-white);
  max-width: 820px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 28px;
  letter-spacing: 0.03em;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.text-gradient {
  background: linear-gradient(135deg, #C7D2FE, #A5B4FC, #F9FAFB);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.hero-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--clr-white);
}

.hero-actions .btn-outline:hover {
  border-color: var(--clr-white);
  background: rgba(255, 255, 255, 0.12);
  color: var(--clr-white);
}

.hero-stats-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 56px;
}

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

.hero-stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1;
  display: block;
  margin-bottom: 4px;
}

.hero-stat-plus {
  font-size: 1.3rem;
  color: var(--clr-primary-300);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 400;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.75rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- Features ---------- */
.features {
  background: var(--clr-gray-50);
}

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

.feature-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--clr-gray-100);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary-400), var(--clr-primary-700));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.feature-card:hover {
  border-color: var(--clr-primary-100);
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
}

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

.feature-card.featured {
  border-color: var(--clr-primary-200);
  background: linear-gradient(180deg, var(--clr-white) 0%, var(--clr-primary-50) 100%);
}

.feature-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--clr-primary-600);
  color: var(--clr-white);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--clr-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--clr-primary-600);
  margin-bottom: 24px;
  transition: all var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--clr-primary-600);
  color: var(--clr-white);
  transform: scale(1.08);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-gray-900);
  margin-bottom: 12px;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--clr-gray-500);
  line-height: 1.75;
  margin-bottom: 20px;
}

.feature-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-primary-600);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}

.feature-link:hover {
  gap: 12px;
  color: var(--clr-primary-700);
}

/* ---------- Stats ---------- */
.stats {
  background: linear-gradient(180deg, var(--clr-gray-900) 0%, var(--clr-gray-800) 100%);
  color: var(--clr-white);
}

.stats .section-title {
  color: var(--clr-white);
}

.stats .section-desc {
  color: var(--clr-gray-400);
}

.stats .section-tag {
  background: rgba(99, 102, 241, 0.2);
  color: var(--clr-primary-300);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
}

.stat-icon {
  font-size: 1.6rem;
  color: var(--clr-primary-400);
  margin-bottom: 16px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--clr-white);
}

.stat-suffix {
  font-size: 1.4rem;
  color: var(--clr-primary-300);
}

.stat-label {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--clr-gray-200);
  margin-bottom: 8px;
}

.stat-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--clr-gray-400);
}

/* ---------- Testimonials ---------- */
.testimonials {
  background: var(--clr-gray-50);
}

.testimonials-wrapper {
  position: relative;
  max-width: 750px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonials-track {
  display: flex;
  transition: transform var(--transition-slow);
}

.testimonial-slide {
  min-width: 100%;
  padding: 0 12px;
}

.testimonial-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  border: 1px solid var(--clr-gray-100);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial-quote {
  font-size: 2.5rem;
  color: var(--clr-primary-200);
  margin-bottom: 16px;
  line-height: 1;
}

.testimonial-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--clr-gray-600);
  margin-bottom: 28px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--clr-primary-500), var(--clr-primary-700));
  color: var(--clr-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.testimonial-info strong {
  display: block;
  font-size: 0.95rem;
  color: var(--clr-gray-900);
  margin-bottom: 2px;
}

.testimonial-info span {
  font-size: 0.8rem;
  color: var(--clr-gray-400);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: var(--radius-full);
  background: var(--clr-white);
  border: 1px solid var(--clr-gray-200);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-gray-600);
  font-size: 1rem;
  transition: all var(--transition);
  z-index: 10;
}

.carousel-btn:hover {
  background: var(--clr-primary-600);
  color: var(--clr-white);
  border-color: var(--clr-primary-600);
  box-shadow: var(--shadow-lg);
}

.carousel-prev { left: -60px; }
.carousel-next { right: -60px; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--clr-gray-300);
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot.active {
  background: var(--clr-primary-600);
  width: 28px;
}

/* ---------- FAQ ---------- */
.faq {
  background: var(--clr-white);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--clr-gray-100);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item.active {
  border-color: var(--clr-primary-100);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  background: var(--clr-white);
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-gray-800);
  text-align: left;
  transition: all var(--transition);
}

.faq-item.active .faq-question {
  color: var(--clr-primary-700);
  background: var(--clr-primary-50);
}

.faq-question i {
  font-size: 0.85rem;
  color: var(--clr-primary-500);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 28px 24px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--clr-gray-600);
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  background: linear-gradient(135deg, var(--clr-primary-700) 0%, var(--clr-primary-900) 100%);
  overflow: hidden;
}

.cta-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--clr-white);
  max-width: 660px;
  margin: 0 auto;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.cta-title {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto 20px;
}

.cta-form-group {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.cta-form-group i {
  position: absolute;
  left: 18px;
  color: var(--clr-gray-400);
  font-size: 0.9rem;
  pointer-events: none;
}

.cta-input {
  width: 100%;
  padding: 16px 18px 16px 46px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: var(--clr-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition);
}

.cta-input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.cta-input:focus {
  border-color: var(--clr-white);
  background: rgba(255, 255, 255, 0.18);
}

.cta-submit {
  flex-shrink: 0;
}

.cta-note {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--clr-gray-900);
  color: var(--clr-gray-300);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.9fr 0.9fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--clr-gray-800);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand i {
  font-size: 1.3rem;
  color: var(--clr-primary-400);
}

.footer-brand strong {
  display: block;
  font-size: 1.1rem;
  color: var(--clr-white);
  font-weight: 700;
}

.footer-brand small {
  font-size: 0.7rem;
  color: var(--clr-gray-500);
  letter-spacing: 0.06em;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--clr-gray-400);
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-gray-400);
  font-size: 0.95rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--clr-primary-600);
  color: var(--clr-white);
  transform: translateY(-2px);
}

.footer-heading {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

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

.footer-links a {
  font-size: 0.88rem;
  color: var(--clr-gray-400);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--clr-primary-300);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: var(--clr-gray-400);
}

.footer-contact i {
  color: var(--clr-primary-400);
  font-size: 0.85rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 0.8rem;
  color: var(--clr-gray-500);
  gap: 12px;
}

.footer-bottom a {
  color: var(--clr-gray-400);
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: var(--clr-primary-300);
}

.footer-divider {
  margin: 0 10px;
  color: var(--clr-gray-700);
}

.footer-icp {
  width: 100%;
  text-align: center;
  padding-top: 12px;
}

.footer-icp a {
  color: var(--clr-gray-500);
  font-size: 0.75rem;
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--clr-primary-600);
  color: var(--clr-white);
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--clr-primary-700);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #c4b5fd; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #a78bfa; }
::selection { background: #7c3aed; color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .carousel-prev { left: -16px; }
  .carousel-next { right: -16px; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .section-title { font-size: 1.9rem; }
  .hero-title { font-size: 2.4rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats-row { gap: 32px; }
  .cta-title { font-size: 2rem; }
  .cta-form { flex-direction: column; }

  .navbar-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: var(--clr-white);
    padding: 100px 32px 40px;
    gap: 32px;
    box-shadow: var(--shadow-xl);
    transition: right var(--transition);
  }

  .navbar-nav.active { right: 0; }

  .nav-list { flex-direction: column; gap: 20px; align-items: flex-start; }

  .hamburger { display: flex; }

  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .testimonials-wrapper { max-width: 100%; }
  .carousel-prev { left: 0; }
  .carousel-next { right: 0; }
  .carousel-btn { width: 38px; height: 38px; font-size: 0.85rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-stats-row { gap: 20px; }
  .hero-stat-num { font-size: 1.8rem; }
  .cta-title { font-size: 1.7rem; }
  .footer-grid { grid-template-columns: 1fr; }
}
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