@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --paper: #f4efe7;
  --ink: #20201d;
  --muted: #59574f;
  --brand: #0d6f76;
  --brand-strong: #0a4e53;
  --accent: #e57d3c;
  --line: #d9d1c7;
  --card: #fffdf9;
  --danger: #9d2f29;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow: 0 24px 60px rgba(34, 30, 25, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #111715;
    --ink: #ecf2ef;
    --muted: #adc0b8;
    --brand: #35a287;
    --brand-strong: #5bc7ab;
    --accent: #f09a62;
    --line: #27312d;
    --card: #18201d;
    --danger: #ff8a7f;
    --shadow: 0 22px 56px rgba(0, 0, 0, 0.34);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% -4%, rgba(13, 111, 118, 0.24), transparent 30%),
    radial-gradient(circle at 92% 0%, rgba(229, 125, 60, 0.22), transparent 34%),
    linear-gradient(to bottom, #f8f3ec 0%, var(--paper));
  color: var(--ink);
  font-family: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  body {
    background:
      radial-gradient(circle at 8% -4%, rgba(53, 162, 135, 0.18), transparent 34%),
      radial-gradient(circle at 95% 0%, rgba(240, 154, 98, 0.14), transparent 34%),
      linear-gradient(to bottom, #151d1a 0%, var(--paper));
  }
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  background: var(--brand);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  z-index: 99;
}

.skip-link:focus-visible {
  top: 12px;
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.shell {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 12;
  margin-top: 14px;
  border: 1px solid rgba(217, 209, 199, 0.8);
  border-radius: 999px;
  background: rgba(255, 253, 249, 0.82);
  box-shadow: 0 12px 30px rgba(35, 31, 26, 0.08);
  transition: 0.22s ease;
}

.topbar.is-scrolled {
  backdrop-filter: blur(10px);
  box-shadow: 0 16px 34px rgba(35, 31, 26, 0.13);
}

@media (prefers-color-scheme: dark) {
  .topbar {
    border-color: rgba(39, 49, 45, 0.92);
    background: rgba(24, 32, 29, 0.82);
  }
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  padding: 8px 12px;
}

.brand-logo {
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  object-fit: contain;
  border: 1px solid var(--line);
  background: #fff;
}

.brand-text {
  font-weight: 800;
  letter-spacing: 0.3px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.nav-link {
  text-decoration: none;
  font-size: 14px;
  color: var(--muted);
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 8px 12px;
  transition: 0.2s ease;
}

.nav-link:hover {
  border-color: var(--line);
  color: var(--ink);
  background: #fff;
}

@media (prefers-color-scheme: dark) {
  .nav-link:hover {
    background: #1e2723;
  }
}

.nav-link.is-cta {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.nav-link.is-cta:hover {
  background: var(--brand-strong);
  border-color: var(--brand-strong);
}

.hero {
  padding: 72px 0 44px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(201, 234, 215, 0.55);
  color: #1d5d3e;
  font-weight: 700;
  font-size: 13px;
}

@media (prefers-color-scheme: dark) {
  .eyebrow {
    background: rgba(53, 162, 135, 0.2);
    color: #8ce4ca;
  }
}

.hero-title {
  margin: 16px 0 0;
  font-family: 'DM Serif Display', 'Noto Serif SC', serif;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.6px;
}

.hero-title .accent {
  color: var(--brand-strong);
}

.hero-sub {
  margin-top: 18px;
  max-width: 610px;
  font-size: 18px;
  color: var(--muted);
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 18px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 22px rgba(13, 111, 118, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 14px 26px rgba(13, 111, 118, 0.35);
}

.btn-secondary {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

@media (prefers-color-scheme: dark) {
  .btn-secondary {
    background: #1c2522;
  }
}

.hero-tags {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 7px 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .chip {
    background: #1a2320;
  }
}

.device-frame {
  position: relative;
  background: #171a1f;
  border-radius: 34px;
  padding: 16px;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    0 30px 60px rgba(20, 22, 26, 0.36);
}

.device-notch {
  position: absolute;
  left: 50%;
  top: 10px;
  transform: translateX(-50%);
  width: 110px;
  height: 18px;
  border-radius: 0 0 16px 16px;
  background: #0e1014;
}

.device-screen {
  border-radius: 24px;
  background:
    radial-gradient(circle at 20% 0%, rgba(13, 111, 118, 0.35), transparent 34%),
    linear-gradient(165deg, #1b2732, #131a22);
  min-height: 470px;
  color: #ecf3f4;
  padding: 18px;
}

.device-screen h3 {
  margin: 6px 0 2px;
  font-size: 18px;
}

.device-screen p {
  margin: 0;
  color: rgba(236, 243, 244, 0.84);
  font-size: 13px;
}

.device-card {
  margin-top: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  padding: 12px;
}

.device-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
}

.device-row + .device-row {
  margin-top: 8px;
}

.device-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5ee6aa;
  box-shadow: 0 0 8px #5ee6aa;
}

.panel {
  margin-top: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 28px;
}

.panel h2 {
  margin: 0;
  font-family: 'DM Serif Display', 'Noto Serif SC', serif;
  font-size: clamp(28px, 3vw, 38px);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.panel h2::before {
  content: '';
  width: 8px;
  height: 28px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
}

.panel-intro {
  margin-top: 10px;
  color: var(--muted);
  max-width: 760px;
}

.section-kicker {
  margin: 0 0 10px;
  color: var(--brand-strong);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 800;
  text-transform: uppercase;
}

.grid {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  padding: 18px;
}

@media (prefers-color-scheme: dark) {
  .card {
    background: #1c2521;
  }
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.download-grid {
  margin-top: 18px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.download-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.download-card .btn {
  width: fit-content;
  margin-top: 4px;
}

.download-meta {
  font-size: 13px;
  color: var(--brand-strong);
  font-weight: 700;
}

.download-note {
  margin: 16px 0 0;
  color: var(--muted);
}

.card ul,
.list ul,
.panel ul,
.panel ol {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.timeline {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #fefcf7);
}

@media (prefers-color-scheme: dark) {
  .step {
    background: linear-gradient(180deg, #1e2723, #1a221f);
  }
}

.step-index {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  background: rgba(13, 111, 118, 0.12);
  color: var(--brand-strong);
}

.step h3 {
  margin: 2px 0 4px;
  font-size: 19px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.boundary {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.boundary-block {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  padding: 18px;
}

.boundary-block.good {
  background: #f2fbf6;
}

.boundary-block.limit {
  background: #fff7ef;
}

@media (prefers-color-scheme: dark) {
  .boundary-block.good {
    background: #1b2a23;
  }

  .boundary-block.limit {
    background: #2c231c;
  }
}

.boundary-block h3 {
  margin: 0;
  font-size: 20px;
}

.boundary-block ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.subpage-header {
  padding: 56px 0 20px;
}

.subpage-header h1 {
  margin: 8px 0 0;
  font-family: 'DM Serif Display', 'Noto Serif SC', serif;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.06;
}

.subpage-header p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 780px;
}

.notice {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fdf7ee;
  padding: 14px;
  color: #5a4d3f;
}

@media (prefers-color-scheme: dark) {
  .notice {
    background: #2a251f;
    color: #ffd6b5;
  }
}

.alert {
  border-radius: var(--radius-md);
  border: 1px solid rgba(157, 47, 41, 0.28);
  background: #fff1ef;
  padding: 14px;
  color: var(--danger);
}

@media (prefers-color-scheme: dark) {
  .alert {
    background: #3a211f;
    border-color: rgba(255, 138, 127, 0.4);
  }
}

.definition-list {
  display: grid;
  gap: 10px;
}

.definition-list dt {
  font-weight: 700;
}

.definition-list dd {
  margin: 4px 0 0;
  color: var(--muted);
}


.footer {
  margin: 30px 0 40px;
  border-radius: 16px;
  border: 1px solid var(--line);
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (prefers-color-scheme: dark) {
  .footer {
    background: rgba(24, 32, 29, 0.82);
  }
}

.footer-meta {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.footer a {
  color: var(--brand-strong);
  text-decoration: none;
  font-weight: 700;
}

.footer-compliance {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  text-align: center;
  font-size: 0.92rem;
  line-height: 1.7;
}

.site-public-info {
  color: var(--muted);
}

.compliance-separator {
  color: var(--muted);
}

.police-record {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.police-badge {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid rgba(44, 122, 94, 0.32);
  background: rgba(44, 122, 94, 0.1);
  color: var(--brand-strong);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

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

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  animation: rise 0.8s ease both;
}

.fade-in.delay-1 {
  animation-delay: 0.1s;
}

.fade-in.delay-2 {
  animation-delay: 0.2s;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 42px;
  }

  .device-frame {
    max-width: 520px;
  }

  .grid.cols-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 760px) {
  .topbar {
    margin-top: 8px;
    border-radius: 16px;
  }

  .topbar-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .brand {
    justify-content: center;
  }

  .nav {
    justify-content: center;
  }

  .hero-title {
    font-size: clamp(34px, 10vw, 48px);
  }

  .hero-sub {
    font-size: 16px;
  }

  .panel {
    padding: 20px;
  }

  .grid.cols-2,
  .grid.cols-3,
  .boundary,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .step {
    grid-template-columns: 42px 1fr;
    gap: 10px;
  }

  .step-index {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    font-size: 16px;
  }

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