:root {
  --bg: #0f1a17;
  --paper: #f4efe5;
  --ink: #132723;
  --ink-soft: #35524c;
  --accent: #ef6a3a;
  --accent-soft: #ffb13d;
  --line: rgba(19, 39, 35, 0.2);
  --card: #fff9f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 177, 61, 0.2), transparent 30%),
    radial-gradient(circle at 85% 5%, rgba(239, 106, 58, 0.2), transparent 32%),
    var(--paper);
}

.site-shell {
  width: min(1200px, 100% - 3rem);
  margin: 1rem auto 2.5rem;
  position: relative;
}

.site-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(transparent 96%, rgba(19, 39, 35, 0.04) 100%);
  background-size: 100% 5px;
  opacity: 0.28;
}

.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.2rem;
  padding: 0.8rem 1.2rem;
  position: sticky;
  top: 0.8rem;
  z-index: 20;
  background: rgba(244, 239, 229, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  min-height: 2.2rem;
}

.brand-symbol {
  display: block;
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(19, 39, 35, 0.12);
  transition: transform 0.2s ease;
}

.brand-logo {
  display: block;
  width: auto;
  height: clamp(28px, 3.2vw, 36px);
  max-width: min(42vw, 220px);
  object-fit: contain;
  filter: drop-shadow(0 1px 0 rgba(255, 255, 255, 0.55));
  transition: transform 0.2s ease, filter 0.2s ease;
}

.brand:hover .brand-logo {
  transform: translateY(-1px);
  filter: drop-shadow(0 2px 4px rgba(19, 39, 35, 0.15));
}

.brand:hover .brand-symbol {
  transform: translateY(-1px);
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.nav-links a,
.footer-links a {
  text-decoration: none;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.nav-links a:hover,
.footer-links a:hover {
  color: var(--ink);
}

.cta-ghost {
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--ink);
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
}

.hero {
  margin-top: 1.5rem;
  padding: 3rem;
  background: linear-gradient(150deg, #fff8e9 0%, #f3e9d9 100%);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  right: -110px;
  bottom: -170px;
  background: conic-gradient(from 75deg, rgba(19, 39, 35, 0.15), rgba(239, 106, 58, 0.35), rgba(255, 177, 61, 0.15));
  border-radius: 12% 40% 20% 48%;
  transform: rotate(12deg);
}

.eyebrow {
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin: 0;
  color: var(--ink-soft);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", "Source Han Serif SC", serif;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.3rem);
  max-width: 18ch;
  line-height: 1.12;
  margin-top: 0.6rem;
}

.hero-copy {
  max-width: 58ch;
  margin: 1rem 0 1.5rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--ink);
  padding: 0.68rem 1.1rem;
  text-decoration: none;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  background: transparent;
}

.btn-solid {
  background: var(--ink);
  color: #f8f2e9;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.58);
}

.install-pwa {
  margin-top: 1rem;
  border: 1px dashed var(--ink-soft);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  padding: 0.6rem 0.9rem;
  font-weight: 600;
}

.hero-metrics {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: 2rem 0 0;
  padding: 0;
  max-width: 660px;
  position: relative;
  z-index: 1;
}

.hero-metrics li {
  border: 1px solid var(--line);
  padding: 0.85rem;
  background: rgba(255, 255, 255, 0.62);
}

.metric-value {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
}

.metric-label {
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.feature-card {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 1.3rem;
  transform: translateY(0);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:nth-child(1),
.feature-card:nth-child(4) {
  grid-column: span 7;
}

.feature-card:nth-child(2),
.feature-card:nth-child(3) {
  grid-column: span 5;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(19, 39, 35, 0.1);
}

.feature-card h2 {
  font-size: 1.35rem;
  line-height: 1.25;
}

.feature-card i {
  color: var(--accent);
  margin-right: 0.35rem;
}

.feature-card p {
  margin: 0.8rem 0 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.split-panel {
  display: grid;
  grid-template-columns: 6fr 5fr;
  gap: 1rem;
  margin-top: 2.1rem;
  align-items: stretch;
}

.panel-copy,
.panel-visual {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 1.6rem;
  position: relative;
}

.panel-copy ul {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.panel-copy li {
  display: flex;
  gap: 0.7rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.panel-copy i {
  color: var(--accent);
  margin-top: 0.2rem;
}

.panel-visual {
  overflow: hidden;
  background:
    linear-gradient(140deg, rgba(239, 106, 58, 0.08), transparent 50%),
    linear-gradient(300deg, rgba(19, 39, 35, 0.12), transparent 48%),
    #f9f2e6;
}

.device {
  border: 1px solid var(--ink);
  background: #fff;
  position: absolute;
  box-shadow: 0 12px 22px rgba(19, 39, 35, 0.12);
}

.device-phone {
  width: 150px;
  height: 280px;
  left: 12%;
  bottom: 12%;
  border-radius: 18px;
  transform: rotate(-11deg);
}

.device-desktop {
  width: 78%;
  height: 66%;
  right: 6%;
  top: 14%;
  border-radius: 12px;
  transform: rotate(3deg);
}

.matrix {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

.matrix-item {
  border: 1px solid var(--line);
  background: #fff6ea;
  padding: 1.3rem;
}

.matrix-tag {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.matrix-item h3 {
  margin-top: 0.5rem;
  font-size: 1.55rem;
}

.matrix-item p:last-child {
  color: var(--ink-soft);
  line-height: 1.62;
}

.pricing {
  margin-top: 2rem;
  border: 1px solid var(--line);
  background: #fbf5ec;
  padding: 1.4rem;
}

.price-grid {
  margin-top: 1.15rem;
  display: grid;
  grid-template-columns: 1fr 1.08fr;
  gap: 0.9rem;
}

.price-card {
  border: 1px solid var(--line);
  background: #fffefb;
  padding: 1.25rem;
  position: relative;
}

.price-card.featured {
  transform: translateY(-10px);
  border-color: var(--ink);
}

.badge {
  position: absolute;
  right: 1rem;
  top: -0.8rem;
  margin: 0;
  font-size: 0.75rem;
  padding: 0.3rem 0.58rem;
  color: #fff;
  background: var(--accent);
}

.price {
  margin: 0.7rem 0 0.8rem;
  font-weight: 700;
  font-size: 1.12rem;
}

.price-card ul {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  line-height: 1.66;
}

.site-footer {
  margin-top: 1.6rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  display: grid;
  grid-template-columns: 2fr 2fr 2fr;
  gap: 1rem;
}

.footer-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.52rem;
  margin-bottom: 0.35rem;
}

.footer-symbol {
  display: block;
  width: 24px;
  height: 24px;
  object-fit: contain;
  border-radius: 5px;
}

.footer-logo {
  display: block;
  width: auto;
  height: 30px;
  max-width: min(48vw, 190px);
  object-fit: contain;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.48rem;
}

.footer-meta p {
  margin: 0 0 0.35rem;
}

.footer-meta .small {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.filing-bar {
  text-align: center;
  margin-top: 2.2rem;
  margin-bottom: 1rem;
  padding: 0.95rem 1rem 0;
  border-top: 1px dashed rgba(19, 39, 35, 0.22);
}

.filing-copy {
  color: #666;
  margin: 0 0 0.45rem;
  font-size: 14px;
}

.filing-links {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
  flex-wrap: wrap;
  justify-content: center;
}

.filing-links a {
  color: #999;
  text-decoration: none;
  font-size: 14px;
}

.filing-links a:hover {
  color: #6f6f6f;
}

.filing-police {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

/* Temporarily hidden until the official public security filing number is ready. */
.filing-police {
  display: none;
}

.filing-police img {
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.delay-1 {
  transition-delay: 0.1s;
}

.reveal.delay-2 {
  transition-delay: 0.2s;
}

.reveal.delay-3 {
  transition-delay: 0.3s;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .cta-ghost {
    justify-self: start;
  }

  .feature-card:nth-child(1),
  .feature-card:nth-child(2),
  .feature-card:nth-child(3),
  .feature-card:nth-child(4) {
    grid-column: span 12;
  }

  .split-panel,
  .matrix,
  .price-grid,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .panel-visual {
    min-height: 340px;
  }

  .price-card.featured {
    transform: none;
  }

  .hero {
    padding: 2rem 1.35rem;
  }

  .site-shell {
    width: min(1200px, 100% - 1.35rem);
  }
}

@media (max-width: 640px) {
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .brand-logo {
    height: 30px;
    max-width: 200px;
  }

  .brand-symbol,
  .footer-symbol {
    display: none;
  }

  .footer-logo {
    height: 26px;
  }

  .filing-bar {
    margin-top: 1.6rem;
    padding-top: 0.8rem;
  }

  .filing-links {
    gap: 0.55rem 0.9rem;
  }
}