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

:root {
  --bg: #f0f6ff;
  --bg-alt: #e8f0fc;
  --bg-gradient: linear-gradient(160deg, #e0ecff 0%, #eaf3ff 25%, #f0f8ff 50%, #e8f4ff 75%, #dfefff 100%);
  --surface: #ffffff;
  --surface-hover: #f8f9fc;
  --border: rgba(100, 110, 140, .1);
  --border-hover: rgba(100, 110, 140, .2);
  --text: #1a2a44;
  --text-dim: #5a6a85;
  --text-dimmer: #8e9ab5;
  --accent: #3b8ef5;
  --accent-hover: #2980e8;
  --accent-glow: rgba(59, 142, 245, .12);
  --accent-soft: rgba(59, 142, 245, .08);
  --shadow-sm: 0 1px 3px rgba(40, 80, 140, .06);
  --shadow-md: 0 8px 30px rgba(40, 80, 140, .08);
  --shadow-lg: 0 20px 60px rgba(40, 80, 140, .12);
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1140px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --mouse-x: 50%;
  --mouse-y: 50%;
}

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle 500px at var(--mouse-x) var(--mouse-y), rgba(59, 142, 245, .18) 0%, rgba(59, 142, 245, .08) 35%, transparent 65%);
  transition: background .08s ease-out;
}

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

::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all .3s var(--ease);
  padding: 18px 0;
}

.header.scrolled {
  background: rgba(255, 255, 255, .75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  box-shadow: var(--shadow-sm);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.logo__icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.logo__img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 6px;
}

.nav {
  display: flex;
  gap: 36px;
  margin-left: auto;
}

.nav a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color .2s;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .3s var(--ease);
}

.nav a:hover {
  color: var(--text);
}

.nav a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: all .3s;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 16px 24px;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  padding: 10px 0;
  color: var(--text-dim);
  font-size: 15px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .25s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, #5ba8f5 100%);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, #4a98ef 100%);
  box-shadow: 0 6px 24px rgba(59, 142, 245, .3);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--border-hover);
  color: var(--text);
  background: rgba(255, 255, 255, .5);
}

.btn--ghost:hover {
  background: #fff;
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.btn--small {
  padding: 8px 20px;
  font-size: 13px;
}

.btn--large {
  padding: 16px 40px;
  font-size: 16px;
}

.btn--block {
  width: 100%;
}

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

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

.hero__orb {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(59, 142, 245, .15) 0%, rgba(91, 168, 245, .08) 40%, transparent 60%);
  filter: blur(40px);
  animation: orb-pulse 6s ease-in-out infinite;
}

@keyframes orb-pulse {
  0%, 100% { opacity: .6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 142, 245, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 142, 245, .04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at center, black 30%, transparent 80%);
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
  max-width: 800px;
}

.hero__tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-hover);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 32px;
  background: rgba(255, 255, 255, .6);
  backdrop-filter: blur(10px);
  opacity: 0;
  animation: fade-up .8s var(--ease) .2s forwards;
}

.hero__title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #1a2a44 0%, #3b8ef5 50%, #5ba8f5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  animation: fade-up .8s var(--ease) .4s forwards;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-dim);
  margin-bottom: 40px;
  line-height: 1.7;
  opacity: 0;
  animation: fade-up .8s var(--ease) .6s forwards;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  opacity: 0;
  animation: fade-up .8s var(--ease) .8s forwards;
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid var(--border-hover);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.hero__scroll span {
  width: 4px;
  height: 8px;
  background: var(--text-dim);
  border-radius: 2px;
  animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: .3; }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Section ===== */
.section {
  padding: 120px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section--alt {
  max-width: none;
  background: rgba(255, 255, 255, .4);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section--alt > * {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

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

.section__label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 12px;
  color: var(--text);
}

.section__desc {
  font-size: 1.05rem;
  color: var(--text-dim);
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all .3s var(--ease);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  background: var(--surface);
  border-color: var(--accent-soft);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card__icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  font-size: .9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ===== Steps ===== */
.steps {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 260px;
  text-align: center;
  padding: 0 24px;
}

.step__num {
  font-size: 2.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent) 0%, #5ba8f5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: .4;
  margin-bottom: 16px;
  letter-spacing: -.05em;
}

.step__body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.step__body p {
  font-size: .9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.step__body code {
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .85em;
  color: var(--accent);
  font-family: 'Consolas', 'Monaco', monospace;
}

.step__body kbd {
  display: inline-block;
  padding: 2px 8px;
  background: var(--surface);
  border: 1px solid var(--border-hover);
  border-radius: 4px;
  font-size: .8em;
  font-family: 'Consolas', 'Monaco', monospace;
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .06);
}

.step__connector {
  width: 60px;
  height: 1px;
  background: var(--border-hover);
  margin-top: 32px;
}

/* ===== Shortcuts ===== */
.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.shortcut-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  transition: all .3s var(--ease);
  box-shadow: var(--shadow-sm);
}

.shortcut-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.shortcut-card__keys {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
}

.shortcut-card__keys kbd {
  padding: 6px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border-hover);
  border-radius: 6px;
  font-size: .85rem;
  font-family: 'Consolas', 'Monaco', monospace;
  color: var(--text);
  box-shadow: 0 2px 0 rgba(0, 0, 0, .08);
}

.shortcut-card__keys span {
  color: var(--text-dimmer);
  font-size: .85rem;
}

.shortcut-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.shortcut-card p {
  font-size: .85rem;
  color: var(--text-dim);
}

/* ===== Pricing ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 28px;
  text-align: center;
  position: relative;
  transition: all .3s var(--ease);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.pricing-card:hover {
  border-color: var(--accent-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.pricing-card--featured {
  border-color: var(--accent);
  border-width: 2px;
  box-shadow: var(--shadow-md);
}

.pricing-card--featured:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.pricing-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent) 0%, #5ba8f5 100%);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 100px;
  white-space: nowrap;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.pricing-card__name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin-bottom: 32px;
}

.pricing-card__currency {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
}

.pricing-card__amount {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--accent) 0%, #5ba8f5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-card__unit {
  font-size: .9rem;
  color: var(--text-dim);
}

/* ===== CTA ===== */
.cta {
  padding: 120px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(59, 142, 245, .1) 0%, rgba(91, 168, 245, .05) 40%, transparent 60%);
  filter: blur(30px);
  z-index: 0;
}

.cta__inner {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #1a2a44 0%, #3b8ef5 50%, #5ba8f5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta__desc {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}

.cta__actions {
  display: flex;
  justify-content: center;
}

/* ===== Footer ===== */
.footer {
  background: rgba(255, 255, 255, .5);
  border-top: 1px solid var(--border);
  padding: 64px 24px 32px;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}

.footer__brand {
  max-width: 280px;
}

.footer__tagline {
  font-size: .9rem;
  color: var(--text-dim);
  margin-top: 16px;
  line-height: 1.7;
}

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

.footer__col h4 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer__col a {
  display: block;
  font-size: .9rem;
  color: var(--text-dim);
  padding: 6px 0;
  transition: color .2s;
}

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

.footer__bottom {
  max-width: var(--max-width);
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer__bottom p {
  font-size: .8rem;
  color: var(--text-dimmer);
  margin-bottom: 4px;
}

.footer__icp a {
  color: var(--text-dimmer);
  transition: color .2s;
}

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

/* ===== Animations ===== */
[data-anim] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

[data-anim].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .step__connector {
    display: none;
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
  }

  .header__inner .btn--small {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

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

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

  .section {
    padding: 80px 20px;
  }

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

  .hero__actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .steps {
    flex-direction: column;
    gap: 32px;
  }

  .step {
    padding: 0;
  }

  .pricing-card {
    padding: 32px 20px;
  }

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