/* ========== CSS Variables (Design Tokens) ========== */
:root {
  --color-primary: #2196F3;
  --color-secondary: #7C4DFF;
  --color-accent: #00E5FF;
  --color-bg-dark: #0A0E1A;
  --color-bg-mid: #0F1528;
  --color-text-primary: #F0F4FF;
  --color-text-secondary: #8B95A5;
  --color-card: rgba(255, 255, 255, 0.05);
  --color-card-border: rgba(255, 255, 255, 0.08);
  --color-card-hover: rgba(33, 150, 243, 0.12);
  --gradient-primary: linear-gradient(135deg, #2196F3, #7C4DFF);
  --gradient-accent: linear-gradient(135deg, #00E5FF, #2196F3);
  --gradient-bg: linear-gradient(180deg, #0A0E1A 0%, #0F1528 50%, #0A0E1A 100%);
  --shadow-glow: 0 0 20px rgba(33, 150, 243, 0.3);
  --shadow-glow-accent: 0 0 30px rgba(0, 229, 255, 0.4);
  --font-heading: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg-dark);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--ease-smooth);
}

ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Typography ========== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text-primary);
  line-height: 1.2;
}

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

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.4s var(--ease-smooth);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  border-bottom: 1px solid var(--color-card-border);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  font-family: var(--font-heading);
}

.nav-logo svg {
  width: 36px;
  height: 36px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  position: relative;
  padding: 8px 18px;
  font-size: 15px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.3s var(--ease-smooth);
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-smooth);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  padding: 9px 24px;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s var(--ease-smooth);
}

.nav-cta:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--ease-smooth);
}

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

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

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

/* ========== Hero Section ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(33, 150, 243, 0.12) 0%, transparent 60%),
              radial-gradient(ellipse 60% 50% at 20% 80%, rgba(124, 77, 255, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse 60% 50% at 80% 20%, rgba(0, 229, 255, 0.06) 0%, transparent 50%);
  z-index: 0;
}

.hero-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  animation: float 8s ease-in-out infinite;
}

.hero-glow--blue {
  top: 10%;
  left: 20%;
  background: var(--color-primary);
}

.hero-glow--purple {
  bottom: 10%;
  right: 15%;
  background: var(--color-secondary);
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: 100px;
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

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

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  border: none;
  transition: all 0.3s var(--ease-smooth);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  border-radius: inherit;
  filter: blur(12px);
  opacity: 0;
  transition: opacity 0.3s;
  z-index: -1;
}

.btn-primary:hover::before {
  opacity: 0.6;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(33, 150, 243, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-card-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: rgba(33, 150, 243, 0.08);
  transform: translateY(-2px);
}

/* Sound wave decoration */
.sound-wave {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  margin-top: 60px;
  height: 40px;
}

.sound-wave .bar {
  width: 4px;
  border-radius: 2px;
  background: var(--gradient-accent);
  animation: wave 1.2s ease-in-out infinite;
}

.sound-wave .bar:nth-child(1) { height: 12px; animation-delay: 0s; }
.sound-wave .bar:nth-child(2) { height: 24px; animation-delay: 0.1s; }
.sound-wave .bar:nth-child(3) { height: 36px; animation-delay: 0.2s; }
.sound-wave .bar:nth-child(4) { height: 20px; animation-delay: 0.3s; }
.sound-wave .bar:nth-child(5) { height: 32px; animation-delay: 0.4s; }
.sound-wave .bar:nth-child(6) { height: 16px; animation-delay: 0.5s; }
.sound-wave .bar:nth-child(7) { height: 28px; animation-delay: 0.6s; }

@keyframes wave {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.4); }
}

/* ========== Features Section ========== */
.features {
  padding: 100px 0;
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-card-border), transparent);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.feature-card {
  position: relative;
  padding: 32px 24px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.4s var(--ease-smooth);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s var(--ease-smooth);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(33, 150, 243, 0.3);
  box-shadow: var(--shadow-glow);
  background: var(--color-card-hover);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(33, 150, 243, 0.1);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-smooth);
}

.feature-card:hover .feature-icon {
  background: rgba(33, 150, 243, 0.2);
  transform: scale(1.08);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* ========== Reviews Section ========== */
.reviews {
  padding: 100px 0;
  position: relative;
}

.reviews-track-wrapper {
  overflow: hidden;
  margin: 0 -24px;
  padding: 0 24px;
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}

.reviews-track {
  display: flex;
  gap: 24px;
  transition: transform 0.6s var(--ease-smooth);
}

.review-card {
  flex: 0 0 340px;
  padding: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s var(--ease-smooth);
}

.review-card:hover {
  border-color: rgba(33, 150, 243, 0.25);
  transform: translateY(-4px);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-meta h4 {
  font-size: 15px;
  font-weight: 600;
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-top: 2px;
}

.review-stars svg {
  width: 14px;
  height: 14px;
  fill: #FFB800;
}

.review-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.reviews-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.reviews-nav button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-card-border);
  background: var(--color-card);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-smooth);
}

.reviews-nav button:hover {
  border-color: var(--color-primary);
  background: rgba(33, 150, 243, 0.1);
}

.reviews-dots {
  display: flex;
  gap: 6px;
}

.reviews-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-card-border);
  transition: all 0.3s var(--ease-smooth);
}

.reviews-dots .dot.active {
  background: var(--color-primary);
  width: 24px;
  border-radius: 4px;
}

/* ========== FAQ Section ========== */
.faq {
  padding: 100px 0;
  position: relative;
}

.faq::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-card-border), transparent);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s var(--ease-smooth);
}

.faq-item:hover {
  border-color: rgba(33, 150, 243, 0.2);
}

.faq-item.open {
  border-color: rgba(33, 150, 243, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 16px;
  font-weight: 600;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  transition: color 0.3s var(--ease-smooth);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s var(--ease-smooth);
  flex-shrink: 0;
  color: var(--color-text-secondary);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

/* ========== Download Page Specific ========== */
.download-hero {
  position: relative;
  padding: 140px 0 80px;
  text-align: center;
  overflow: hidden;
}

.download-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(33, 150, 243, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse 50% 40% at 70% 70%, rgba(124, 77, 255, 0.1) 0%, transparent 50%);
}

.download-hero .hero-content {
  position: relative;
  z-index: 1;
}

.platform-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.platform-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-card-border);
  background: var(--color-card);
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease-smooth);
  backdrop-filter: blur(10px);
}

.platform-tab:hover,
.platform-tab.active {
  border-color: var(--color-primary);
  color: var(--color-text-primary);
  background: rgba(33, 150, 243, 0.1);
}

.platform-tab.active {
  box-shadow: var(--shadow-glow);
}

.platform-tab svg {
  width: 20px;
  height: 20px;
}

.download-btn-main {
  margin-top: 36px;
  padding: 18px 48px;
  font-size: 18px;
  border-radius: var(--radius-lg);
  animation: pulse-glow 2.5s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(33, 150, 243, 0.3); }
  50% { box-shadow: 0 0 40px rgba(33, 150, 243, 0.5), 0 0 60px rgba(124, 77, 255, 0.2); }
}

/* Download advantages */
.dl-advantages {
  padding: 80px 0;
}

.dl-adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.dl-adv-card {
  padding: 32px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.4s var(--ease-smooth);
  position: relative;
  overflow: hidden;
}

.dl-adv-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(33, 150, 243, 0.06) 0%, transparent 70%);
  transition: opacity 0.4s;
  opacity: 0;
}

.dl-adv-card:hover {
  transform: translateY(-4px);
  border-color: rgba(33, 150, 243, 0.25);
  box-shadow: var(--shadow-glow);
}

.dl-adv-card:hover::after {
  opacity: 1;
}

.dl-adv-card .icon-wrap {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(33, 150, 243, 0.12);
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
}

.dl-adv-card .icon-wrap svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.dl-adv-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* Steps section */
.dl-steps {
  padding: 80px 0;
  position: relative;
}

.dl-steps::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-card-border), transparent);
}

.steps-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.step-card {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--ease-smooth);
}

.step-card:hover {
  border-color: rgba(33, 150, 243, 0.2);
  background: rgba(33, 150, 243, 0.04);
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* System & Version */
.dl-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.info-card {
  padding: 32px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.info-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.info-card h3 svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table tr {
  border-bottom: 1px solid var(--color-card-border);
}

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

.info-table td {
  padding: 12px 0;
  font-size: 14px;
}

.info-table td:first-child {
  color: var(--color-text-secondary);
  width: 140px;
}

.info-table td:last-child {
  color: var(--color-text-primary);
}

.version-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-card-border);
}

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

.version-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(0, 229, 255, 0.12);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}

.version-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.version-item p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ========== Footer ========== */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--color-card-border);
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-top: 12px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 4px 0;
  transition: all 0.3s var(--ease-smooth);
}

.footer-col a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--color-card-border);
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 80px 24px 24px;
    gap: 4px;
    transition: right 0.4s var(--ease-smooth);
    border-left: 1px solid var(--color-card-border);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    padding: 12px 16px;
    width: 100%;
    font-size: 16px;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-cta-wrap {
    margin-top: 16px;
    width: 100%;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .hero h1 {
    font-size: clamp(28px, 8vw, 42px);
  }

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

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
  }

  .feature-card {
    padding: 24px 16px;
  }

  .review-card {
    flex: 0 0 290px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

  .dl-info-grid {
    grid-template-columns: 1fr;
  }

  .step-card {
    gap: 16px;
  }

  .platform-tabs {
    gap: 8px;
  }

  .platform-tab {
    padding: 10px 18px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
  }
}