/* ========================================================================
   Design System & CSS Variables
   ======================================================================== */

:root {
  --color-primary: #29ABE2;
  --color-primary-light: #5cc8f0;
  --color-primary-dark: #1E8EBF;
  --color-accent-yellow: #FCD800;
  --color-accent-green: #72BF44;
  --color-accent-red: #ED1C24;

  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fc;
  --color-bg-dark: #0a1a2a;
  --color-bg-card: #ffffff;

  --color-text: #1a1a2e;
  --color-text-secondary: #636e82;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #ffffff;

  --color-border: #e5e7eb;
  --color-border-light: #f0f1f3;

  --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  --container-max: 1200px;
  --nav-height: 72px;
}

/* ========================================================================
   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-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

input {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================================================
   Utility
   ======================================================================== */

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

.gradient-text {
  background: linear-gradient(135deg, var(--color-accent-green) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-top: 16px;
}

/* ========================================================================
   Buttons
   ======================================================================== */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(41, 171, 226, 0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: transparent;
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  transition: all var(--transition-base);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.btn-ghost:hover {
  color: var(--color-primary);
  background: rgba(41, 171, 226, 0.06);
}

.btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  transition: all var(--transition-base);
}

.btn-white:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.25);
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: transparent;
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-base);
}

.btn-outline-white:hover {
  border-color: #fff;
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: var(--font-size-base);
}

.btn-with-icon {
  gap: 10px;
}

.btn-external-icon {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.btn-with-icon:hover .btn-external-icon {
  transform: translate(2px, -2px);
}

/* ========================================================================
   Navigation
   ======================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  border-bottom-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--container-max);
  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-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

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

.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--color-border, rgba(0, 0, 0, 0.12));
  border-radius: 999px;
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.lang-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(41, 171, 226, 0.06);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ========================================================================
   Hero
   ======================================================================== */

.hero {
  position: relative;
  padding: 160px 0 100px;
  text-align: center;
  overflow: hidden;
}

.hero-bg-gradient {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(ellipse at center, rgba(41, 171, 226, 0.08) 0%, rgba(41, 171, 226, 0.02) 40%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

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

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

.hero-badge a {
  color: var(--color-primary);
  font-weight: 600;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 900px;
  margin: 0 auto 24px;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

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

.hero-email {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 520px;
  margin: 0 auto;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 6px 6px 6px 8px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.hero-email:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(41, 171, 226, 0.12);
}

.hero-email-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  padding-left: 12px;
}

.hero-email-icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.hero-email input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--font-size-base);
  color: var(--color-text);
  padding: 10px 0;
  min-width: 0;
}

.hero-email input::placeholder {
  color: var(--color-text-muted);
}

.hero-email .btn-primary {
  flex-shrink: 0;
  white-space: nowrap;
}

.hero-email-note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: 16px;
}

/* ========================================================================
   Trusted By / Logo Marquee
   ======================================================================== */

.trusted {
  padding: 48px 0 80px;
  overflow: hidden;
}

.trusted-label {
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 32px;
}

.logo-marquee {
  position: relative;
  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);
}

.logo-track {
  display: flex;
  gap: 64px;
  animation: marquee 30s linear infinite;
  width: max-content;
}

.logo-item {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  white-space: nowrap;
  user-select: none;
}

.logo-item img {
  max-height: 100%;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  opacity: 0.7;
  filter: grayscale(100%);
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.logo-item img:hover {
  opacity: 1;
  filter: grayscale(0%);
}

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

/* ========================================================================
   Customer Spotlight
   ======================================================================== */

.spotlight {
  padding: 80px 0;
  background: var(--color-bg-alt);
}

.spotlight-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
}

.spotlight-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

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

.spotlight-card-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.spotlight-card-img > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform 0.4s ease;
}

.spotlight-card:hover .spotlight-card-img > img {
  transform: scale(1.04);
}

.spotlight-card--featured .spotlight-card-img {
  height: 260px;
}

.spotlight-card-img--image {
  overflow: hidden;
  background: #fff;
}

.spotlight-card-attribution {
  margin-top: 12px;
  margin-bottom: 0;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

.spotlight-card-img--image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.spotlight-card:hover .spotlight-card-img--image img {
  transform: scale(1.04);
}

.spotlight-card-logo {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.02em;
}

.spotlight-card-body {
  padding: 24px;
}

.spotlight-card-body h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
}

.card-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  gap: 8px;
}

/* ========================================================================
   Features
   ======================================================================== */

.features {
  padding: 100px 0;
}

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

.feature-card {
  padding: 40px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: rgba(41, 171, 226, 0.2);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(41, 171, 226, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

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

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

/* ========================================================================
   Stats
   ======================================================================== */

.stats {
  padding: 100px 0;
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse at center, rgba(41, 171, 226, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.stats-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 64px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.stat-number {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(135deg, #fff, var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-suffix {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================================================
   How It Works
   ======================================================================== */

.how-it-works {
  padding: 100px 0;
}

.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.how-it-works-card {
  position: relative;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 40px 32px 36px;
  text-align: center;
  transition: all var(--transition-base);
}

.how-it-works-card:hover {
  border-color: rgba(41, 171, 226, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.how-it-works-number {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 800;
  font-size: var(--font-size-sm);
  box-shadow: 0 4px 12px rgba(41, 171, 226, 0.3);
}

.how-it-works-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(41, 171, 226, 0.08);
  border-radius: var(--radius-md);
  margin: 0 auto 20px;
}

.how-it-works-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 12px;
}

.how-it-works-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

/* ========================================================================
   Use Cases
   ======================================================================== */

.use-cases {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.use-case-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 40px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
  padding: 4px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  border: 1px solid var(--color-border);
}

.tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.tab-btn.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.tab-btn:hover:not(.active) {
  color: var(--color-text);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.use-case-card {
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.use-case-card:hover {
  border-color: rgba(41, 171, 226, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.use-case-card.hidden {
  display: none;
}

.use-case-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(41, 171, 226, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  color: var(--color-primary);
}

.use-case-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 8px;
}

.use-case-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ========================================================================
   Built For
   ======================================================================== */

.built-for {
  padding: 100px 0;
}

.built-for h2 {
  text-align: center;
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
}

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

.built-for-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  background: var(--color-bg-card);
  transition: all var(--transition-base);
}

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

.built-for-visual {
  height: 200px;
  overflow: hidden;
  position: relative;
  background: var(--color-bg-alt);
}

.built-for-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.built-for-card:hover .built-for-visual img {
  transform: scale(1.04);
}

.built-for-card h3 {
  padding: 24px 24px 0;
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.built-for-card p {
  padding: 12px 24px 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.built-for-card .card-link {
  display: inline-block;
  padding: 16px 24px 24px;
}

/* ========================================================================
   Testimonials
   ======================================================================== */

.testimonials {
  padding: 100px 0;
  background: var(--color-bg-alt);
  overflow: hidden;
}

.testimonial-carousel {
  position: relative;
  overflow: hidden;
}

.testimonial-track {
  display: flex;
  gap: 24px;
  transition: transform 500ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

.testimonial-card {
  flex: 0 0 calc((100% - 48px) / 3);
  box-sizing: border-box;
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-quote p {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  margin-top: 12px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-light);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.testimonial-author strong {
  display: block;
  font-size: var(--font-size-sm);
}

.testimonial-author span {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  background: var(--color-bg);
}

.carousel-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* ========================================================================
   CTA
   ======================================================================== */

.cta {
  padding: 120px 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1E8EBF 50%, #166F96 100%);
}

.cta-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(92, 200, 240, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  text-align: center;
  color: var(--color-text-inverse);
}

.cta-content h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

html[data-lang="zh"] .cta-content h2 {
  max-width: none;
}

@media (min-width: 769px) {
  html[data-lang="zh"] .cta-content h2 {
    white-space: nowrap;
  }
}

.cta-content p {
  font-size: var(--font-size-lg);
  opacity: 0.85;
  max-width: 560px;
  margin: 0 auto 40px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ========================================================================
   Footer
   ======================================================================== */

.footer {
  padding: 80px 0 0;
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
}

.footer-top {
  display: flex;
  gap: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  max-width: 280px;
  flex-shrink: 0;
}

.footer-brand .nav-logo span {
  color: var(--color-text-inverse);
}

.footer-brand > p {
  margin-top: 16px;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer-badges {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}

.footer-badges .badge {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  flex: 1;
}

.footer-col h4 {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: var(--font-size-sm);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-text-inverse);
}

.footer-newsletter {
  padding: 40px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-newsletter h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-inverse);
  margin-bottom: 4px;
}

.footer-newsletter > p {
  font-size: var(--font-size-sm);
  margin-bottom: 16px;
}

.newsletter-form {
  display: flex;
  gap: 8px;
  max-width: 420px;
}

.newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-inverse);
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.newsletter-form input:focus {
  border-color: var(--color-primary-light);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.35);
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ========================================================================
   Scroll Animations
   ======================================================================== */

[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========================================================================
   Responsive
   ======================================================================== */

@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.75rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }

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

  .spotlight-card--featured .spotlight-card-img {
    height: 200px;
  }

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

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .stat-number {
    font-size: 3rem;
  }

  .use-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .how-it-works-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .built-for-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-card {
    flex-basis: calc((100% - 24px) / 2);
  }

  .footer-top {
    flex-direction: column;
    gap: 40px;
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.75rem;
    --nav-height: 64px;
  }

  .nav-links,
  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  .nav-actions.open {
    display: flex;
    position: absolute;
    top: calc(var(--nav-height) + 200px);
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 0 24px 16px;
    border-bottom: 1px solid var(--color-border);
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-email {
    flex-direction: column;
    border-radius: var(--radius-lg);
    padding: 4px;
  }

  .hero-email-input-wrap {
    width: 100%;
    padding: 8px 12px;
  }

  .hero-email .btn-primary {
    width: 100%;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta a {
    width: 100%;
  }

  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-card {
    flex-basis: 100%;
  }

  .cta {
    padding: 80px 0;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .footer-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .newsletter-form {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-5xl: 1.875rem;
    --font-size-4xl: 1.5rem;
  }

  .container {
    padding: 0 16px;
  }

  .feature-card {
    padding: 28px;
  }

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