:root {
  --paper: #f1e2c7;
  --paper-soft: #fff7ea;
  --paper-shadow: #dfc095;
  --ink: #2e1d13;
  --ink-soft: #694f39;
  --line: rgba(123, 86, 56, 0.28);
  --accent: #b66324;
  --accent-deep: #7e421b;
  --teal: #277d73;
  --rose: #cc7d68;
  --surface: rgba(255, 248, 237, 0.78);
  --surface-strong: rgba(255, 252, 245, 0.9);
  --shadow: 0 24px 70px rgba(77, 44, 20, 0.14);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --content-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Manrope", "PingFang SC", "Hiragino Sans GB", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 247, 226, 0.92), transparent 28%),
    radial-gradient(circle at 85% 16%, rgba(39, 125, 115, 0.12), transparent 22%),
    linear-gradient(135deg, #f4e5ca 0%, #efdbba 54%, #e7c89a 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(155, 111, 67, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 100% 24px, 28px 100%;
  opacity: 0.45;
}

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

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

.site-shell {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
  padding: 20px 0 36px;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  margin-bottom: 24px;
  background: rgba(255, 248, 237, 0.72);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(77, 44, 20, 0.1);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(126, 66, 27, 0.18);
}

.topnav {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(126, 66, 27, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.38);
}

.lang-switcher button {
  min-width: 38px;
  height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
}

.lang-switcher button.is-active {
  color: #fff8ef;
  background: linear-gradient(135deg, var(--accent), #cd7a37);
  box-shadow: 0 10px 20px rgba(182, 99, 36, 0.22);
}

.topnav a {
  position: relative;
}

.topnav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.topnav a:hover::after,
.topnav a:focus-visible::after {
  transform: scaleX(1);
}

.hero,
.feature-grid,
.content-section,
.policy-layout {
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 28px;
  align-items: stretch;
  margin-top: 28px;
}

.hero-copy,
.hero-card,
.feature-panel,
.scene-card,
.privacy-highlight,
.audience-card,
.policy-card,
.policy-hero {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-copy {
  padding: 40px;
  border-radius: var(--radius-xl);
}

.eyebrow,
.panel-label,
.policy-meta {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.policy-hero h1,
.feature-panel-large h3 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(3.2rem, 7vw, 5.6rem);
}

.hero-text,
.meta-note,
.feature-panel p,
.scene-card p,
.privacy-copy p,
.audience-card p,
.policy-card p,
.policy-intro {
  color: var(--ink-soft);
  line-height: 1.8;
}

.hero-text {
  margin: 20px 0 0;
  max-width: 34rem;
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff8ef;
  background: linear-gradient(135deg, var(--accent) 0%, #cd7a37 100%);
  box-shadow: 0 16px 26px rgba(182, 99, 36, 0.28);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid rgba(126, 66, 27, 0.18);
}

.meta-note {
  margin: 18px 0 0;
  font-size: 0.95rem;
}

.hero-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border-radius: calc(var(--radius-xl) + 6px);
  overflow: hidden;
}

.device-card {
  width: min(100%, 420px);
  padding: 26px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 253, 248, 0.96), rgba(248, 235, 213, 0.92)),
    var(--paper-soft);
  border: 1px solid rgba(126, 66, 27, 0.18);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.72),
    0 24px 40px rgba(77, 44, 20, 0.14);
}

.device-card-top,
.decision-strip,
.footer,
.privacy-highlight {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.status-pill {
  padding: 8px 12px;
  border-radius: 999px;
  color: #fff8ef;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  font-size: 0.86rem;
  font-weight: 800;
}

.status-time {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.device-card h2 {
  margin: 22px 0 12px;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.14;
}

.device-card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag-row span,
.privacy-list li::marker {
  color: var(--teal);
}

.tag-row span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(39, 125, 115, 0.1);
  font-size: 0.88rem;
  font-weight: 700;
}

.decision-strip {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed rgba(126, 66, 27, 0.24);
}

.decision-strip strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.96rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.feature-panel {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.feature-panel-large {
  grid-column: span 2;
}

.feature-panel h3 {
  margin: 0 0 12px;
  font-size: 1.18rem;
}

.content-section {
  margin-top: 24px;
  padding: 34px;
  border-radius: var(--radius-xl);
  background: rgba(255, 250, 241, 0.48);
  border: 1px solid rgba(123, 86, 56, 0.16);
}

.section-heading {
  max-width: 52rem;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.scene-grid,
.audience-grid,
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.scene-card,
.audience-card,
.plan-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.plan-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.plan-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.plan-card-free {
  background:
    linear-gradient(180deg, rgba(255, 251, 245, 0.92), rgba(245, 233, 214, 0.88));
}

.plan-card-pro {
  background:
    linear-gradient(180deg, rgba(191, 110, 39, 0.14), rgba(126, 66, 27, 0.08)),
    rgba(255, 248, 237, 0.9);
}

.plan-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.plan-card h3 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

.plan-list {
  margin: 0;
  padding-left: 20px;
  color: var(--ink-soft);
  line-height: 1.9;
}

.plan-note {
  margin: 16px 0 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.scene-index {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--rose);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.scene-card h3,
.audience-card h3,
.policy-card h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.privacy-highlight {
  margin-top: 24px;
  padding: 28px;
  border-radius: 24px;
}

.privacy-copy {
  max-width: 44rem;
}

.privacy-list,
.policy-card ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.policy-layout {
  display: grid;
  gap: 18px;
}

.policy-hero,
.policy-card {
  border-radius: var(--radius-xl);
}

.policy-hero {
  padding: 34px;
}

.policy-hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.3rem);
}

.policy-card {
  padding: 28px 30px;
}

.footer {
  margin-top: 28px;
  padding: 24px 6px 0;
  color: var(--ink-soft);
  border-top: 1px solid rgba(123, 86, 56, 0.18);
}

.footer p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise-in 620ms ease forwards;
}

.reveal-delay {
  animation-delay: 120ms;
}

@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .hero,
  .feature-grid,
  .scene-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .feature-panel-large {
    grid-column: span 1;
  }

  .privacy-highlight,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(calc(100% - 20px), var(--content-width));
    padding-top: 12px;
  }

  .topbar {
    position: static;
    border-radius: 26px;
    padding: 14px;
  }

  .topnav {
    gap: 12px;
    font-size: 0.9rem;
  }

  .topbar-actions {
    width: 100%;
    align-items: flex-start;
    flex-direction: column;
  }

  .lang-switcher {
    align-self: flex-start;
  }

  .hero-copy,
  .hero-card,
  .content-section,
  .policy-hero,
  .policy-card {
    padding: 22px;
  }

  .device-card {
    padding: 20px;
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .reveal-delay,
  .button,
  .topnav a::after {
    animation: none;
    transition: none;
    transform: none;
    opacity: 1;
  }
}