:root {
  --ink: #2f2c28;
  --ink-2: #544e45;
  --muted: #7d7468;
  --line: rgba(47, 44, 40, 0.12);
  --line-strong: rgba(47, 44, 40, 0.2);
  --paper: #fffaf1;
  --paper-2: #f7efe2;
  --white: #ffffff;
  --gold: #e6a71f;
  --gold-2: #f6c35b;
  --gold-soft: #fff2cb;
  --green: #4f7464;
  --green-2: #86a990;
  --green-soft: #e8f0ea;
  --red: #c45545;
  --red-soft: #fee8e4;
  --shadow: 0 24px 70px rgba(47, 44, 40, 0.13);
  --shadow-soft: 0 16px 44px rgba(47, 44, 40, 0.09);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(230, 167, 31, 0.12), transparent 34rem),
    radial-gradient(circle at 90% 5%, rgba(79, 116, 100, 0.12), transparent 32rem),
    var(--paper);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.72;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 999;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(47, 44, 40, 0.08);
  background: rgba(255, 250, 241, 0.88);
  backdrop-filter: blur(18px);
}

.navbar {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: max-content;
  line-height: 0;
}

.brand-logo {
  display: block;
  width: auto;
  height: 62px;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  margin: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 800;
  transition: 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
  background: rgba(230, 167, 31, 0.16);
}

.nav-links .nav-cta {
  margin-left: 4px;
  color: var(--white);
  background: var(--ink);
  box-shadow: 0 12px 32px rgba(47, 44, 40, 0.16);
}

.nav-links .nav-cta:hover {
  color: var(--white);
  background: #171513;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.65);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--ink);
}

.hero,
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 86px 0 72px;
}

.hero::before,
.page-hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 720px;
  height: 720px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(230, 167, 31, 0.18), transparent 68%);
  pointer-events: none;
}

.hero-grid,
.page-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 54px;
}

.hero h1,
.page-hero h1 {
  margin: 14px 0 20px;
  max-width: 780px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.06;
  letter-spacing: -0.07em;
}

.page-hero h1 {
  font-size: clamp(38px, 6vw, 66px);
}

.hero-lead,
.page-lead,
.section-lead {
  margin: 0;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.95;
}

.hero-lead strong,
.page-lead strong,
.section-lead strong {
  color: var(--ink);
  background: linear-gradient(transparent 64%, rgba(230, 167, 31, 0.25) 0);
}

.hero-actions,
.cta-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 13px 21px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 900;
  line-height: 1.2;
  transition: 0.22s ease;
}

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

.btn-primary {
  color: var(--white);
  background: var(--ink);
  box-shadow: 0 18px 40px rgba(47, 44, 40, 0.18);
}

.btn-primary:hover {
  background: #171513;
}

.btn-outline {
  color: var(--ink);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.48);
}

.btn-outline:hover {
  border-color: rgba(47, 44, 40, 0.34);
  background: rgba(255, 255, 255, 0.84);
}

.btn-gold {
  color: var(--ink);
  background: linear-gradient(135deg, var(--gold), #ffd782);
  box-shadow: 0 18px 40px rgba(230, 167, 31, 0.25);
}

.btn-outline.light {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--gold);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before,
.kicker::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 8px rgba(230, 167, 31, 0.15);
}

.eyebrow.green,
.kicker.green {
  color: var(--green);
}

.eyebrow.green::before,
.kicker.green::before {
  box-shadow: 0 0 0 8px rgba(79, 116, 100, 0.13);
}

.kicker.dark {
  color: var(--gold-2);
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-note span,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  background: rgba(255, 255, 255, 0.54);
  font-size: 13px;
  font-weight: 850;
}

.badge.gold {
  border-color: rgba(230, 167, 31, 0.35);
  color: #7c5600;
  background: rgba(230, 167, 31, 0.14);
}

.badge.green {
  border-color: rgba(79, 116, 100, 0.28);
  color: var(--green);
  background: rgba(79, 116, 100, 0.1);
}

.safety-panel,
.page-summary-card,
.path-card,
.product-panel,
.card,
.axis-card,
.compare-card,
.compliance-card,
.patent-card,
.process-card {
  border: 1px solid rgba(47, 44, 40, 0.1);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow-soft);
}

.safety-panel {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border-radius: var(--radius-xl);
}

.safety-panel::before,
.page-summary-card::before,
.product-panel::before,
.expert-band::before,
.patent-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.16));
  pointer-events: none;
}

.safety-caption {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.safety-visual {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  min-height: 330px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 52%, rgba(230, 167, 31, 0.34), transparent 14rem),
    linear-gradient(135deg, rgba(47, 44, 40, 0.07), rgba(255, 255, 255, 0.7));
  overflow: hidden;
}

.signal-ring {
  position: absolute;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(230, 167, 31, 0.34);
  border-radius: 999px;
  opacity: 0;
  animation: ping 4s infinite;
}

.signal-ring:nth-of-type(2) {
  animation-delay: 1.1s;
}

.signal-ring:nth-of-type(3) {
  animation-delay: 2.2s;
}

@keyframes ping {
  0% { transform: scale(0.68); opacity: 0; }
  20% { opacity: 0.7; }
  100% { transform: scale(2.8); opacity: 0; }
}

.cover-shell {
  position: absolute;
  z-index: 1;
  width: 250px;
  height: 250px;
  border-radius: 34px;
  border: 2px solid rgba(255, 255, 255, 0.84);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.1)),
    repeating-linear-gradient(90deg, rgba(47, 44, 40, 0.06) 0 1px, transparent 1px 22px);
  box-shadow: inset 0 1px 18px rgba(255, 255, 255, 0.75), 0 24px 60px rgba(47, 44, 40, 0.16);
  transform: rotate(-7deg);
}

.cover-shell::before {
  content: "防誤觸保護殼";
  position: absolute;
  left: 50%;
  top: 18px;
  transform: translateX(-50%);
  min-width: max-content;
  padding: 4px 10px;
  border-radius: 999px;
  color: rgba(47, 44, 40, 0.7);
  background: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 900;
}

.help-button {
  position: relative;
  z-index: 2;
  width: 154px;
  height: 154px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: linear-gradient(145deg, #df5a49, #9d302b);
  box-shadow: inset 0 14px 20px rgba(255, 255, 255, 0.24), inset 0 -18px 28px rgba(72, 0, 0, 0.22), 0 34px 54px rgba(148, 45, 42, 0.32);
}

.help-button::before {
  content: "";
  position: absolute;
  inset: -13px;
  border-radius: 999px;
  border: 9px solid #f6cbba;
  box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.7);
}

.help-button div {
  position: relative;
  z-index: 1;
  color: var(--white);
  text-align: center;
  line-height: 1.1;
}

.help-button strong {
  display: block;
  font-size: 32px;
  letter-spacing: 0.04em;
}

.help-button span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 900;
}

.button-base {
  position: absolute;
  z-index: 0;
  bottom: 54px;
  width: 220px;
  height: 32px;
  border-radius: 999px;
  background: rgba(47, 44, 40, 0.18);
  filter: blur(14px);
}

.guardrail-list {
  position: relative;
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.guardrail-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: start;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 250, 241, 0.72);
}

.guardrail-item b,
.step-number,
.timeline-no {
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: var(--ink);
  background: var(--gold);
  font-size: 14px;
  font-weight: 1000;
}

.guardrail-item b {
  width: 34px;
  height: 34px;
}

.guardrail-item span {
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.7;
}

.section {
  padding: 92px 0;
}

.section-tight {
  padding: 60px 0;
}

.section-muted {
  background: rgba(247, 239, 226, 0.78);
  border-block: 1px solid rgba(47, 44, 40, 0.07);
}

.section-dark {
  color: var(--white);
  background: radial-gradient(circle at 14% 16%, rgba(230, 167, 31, 0.17), transparent 32rem), linear-gradient(135deg, #322f2b, #1f1d1a);
}

.section-dark .section-lead,
.section-dark .card p,
.section-dark .metric span {
  color: rgba(255, 255, 255, 0.76);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 38px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.section-title {
  margin: 10px 0 14px;
  font-size: clamp(30px, 4.8vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.045em;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.metric {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
}

.metric strong {
  display: block;
  color: var(--gold-2);
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.metric span {
  display: block;
  margin-top: 12px;
  font-weight: 800;
}

.concept-grid,
.path-wrap,
.expert-grid,
.stage-grid,
.dual-grid,
.process-grid,
.compliance-grid,
.patent-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 34px;
  align-items: start;
}

.concept-visual {
  position: sticky;
  top: 110px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.56);
  box-shadow: var(--shadow-soft);
}

.concept-step,
.stage-step {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.concept-step:first-of-type,
.stage-step:first-of-type {
  border-top: 0;
}

.concept-step b,
.stage-step b {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  color: var(--ink);
  background: linear-gradient(135deg, var(--gold), #ffdb86);
  box-shadow: 0 14px 30px rgba(230, 167, 31, 0.18);
}

.concept-step h3,
.stage-step h3,
.card h3,
.axis-card h3,
.product-panel h3,
.timeline-content h3,
.page-summary-card h2,
.compare-card h3,
.compliance-card h3,
.patent-card h3,
.process-card h3 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.concept-step p,
.stage-step p,
.card p,
.axis-card p,
.product-panel p,
.timeline-content p,
.page-summary-card p,
.compare-card p,
.compliance-card p,
.patent-card p,
.process-card p {
  margin: 0;
  color: var(--ink-2);
}

.path-card {
  position: sticky;
  top: 110px;
  padding: 32px;
  border-radius: var(--radius-xl);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.timeline {
  position: relative;
  display: grid;
  gap: 16px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(var(--gold), var(--green));
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: start;
}

.timeline-no {
  z-index: 1;
  width: 54px;
  height: 54px;
  box-shadow: 0 0 0 8px var(--paper-2);
}

.section-muted .timeline-no {
  box-shadow: 0 0 0 8px var(--paper-2);
}

.timeline-item:nth-child(even) .timeline-no,
.guardrail-item:nth-child(even) b {
  color: var(--white);
  background: var(--green);
}

.timeline-content {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 12px 30px rgba(47, 44, 40, 0.06);
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.product-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.product-panel-head {
  position: relative;
  min-height: 160px;
  padding: 28px;
  color: var(--white);
  background: radial-gradient(circle at 85% 12%, rgba(255, 255, 255, 0.2), transparent 14rem), linear-gradient(135deg, #3b352e, #211f1b);
}

.product-panel-head.green-head {
  background: radial-gradient(circle at 85% 12%, rgba(255, 255, 255, 0.2), transparent 14rem), linear-gradient(135deg, #5a7d6d, #263f37);
}

.product-panel-head h3 {
  max-width: 430px;
  font-size: 30px;
  color: var(--white);
}

.product-panel-body {
  position: relative;
  padding: 28px;
}

.feature-list,
.axis-card ul,
.clean-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.feature-list li,
.axis-card li,
.clean-list li {
  position: relative;
  padding-left: 28px;
  color: var(--ink-2);
  font-weight: 760;
}

.feature-list li::before,
.axis-card li::before,
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 6px rgba(230, 167, 31, 0.13);
}

.green-check li::before,
.axis-card:nth-child(2) li::before,
.axis-card:nth-child(3) li::before {
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(79, 116, 100, 0.13);
}

.card {
  padding: 26px;
  border-radius: var(--radius-lg);
}

.card.dark-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: none;
}

.card.dark-card h3 {
  color: var(--white);
}

.icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 16px;
  color: var(--ink);
  background: var(--gold);
  font-weight: 1000;
}

.icon.green {
  color: var(--white);
  background: var(--green);
}

.icon.red {
  color: var(--white);
  background: var(--red);
}

.page-summary-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.summary-list {
  position: relative;
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.summary-list div {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 250, 241, 0.74);
}

.summary-list b {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  color: var(--ink);
  background: var(--gold);
  font-size: 20px;
}

.summary-list div:nth-child(even) b {
  color: var(--white);
  background: var(--green);
}

.summary-list span {
  color: var(--ink-2);
  font-weight: 780;
}

.mit-axis {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.axis-card {
  padding: 26px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.72);
}

.axis-label {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  color: #7d5600;
  background: var(--gold-soft);
  font-size: 13px;
  font-weight: 950;
}

.axis-card:nth-child(2) .axis-label,
.axis-card:nth-child(3) .axis-label {
  color: var(--green);
  background: var(--green-soft);
}

.expert-band,
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.expert-band {
  padding: 36px;
  color: var(--white);
  background: radial-gradient(circle at 80% 12%, rgba(255, 221, 139, 0.24), transparent 18rem), linear-gradient(135deg, #38342f, #1f1d1a);
}

.expert-band h2,
.expert-band p,
.expert-band .kicker {
  position: relative;
}

.expert-band h2 {
  margin: 10px 0 16px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.045em;
}

.expert-band p {
  color: rgba(255, 255, 255, 0.76);
}

.expert-stats {
  position: relative;
  display: grid;
  gap: 14px;
}

.expert-stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.07);
}

.expert-stat strong {
  color: var(--gold-2);
  font-size: 42px;
  line-height: 1;
}

.expert-stat span {
  color: rgba(255, 255, 255, 0.76);
  font-weight: 900;
}

.cta-band {
  padding: 42px;
  color: var(--white);
  background: radial-gradient(circle at 9% 12%, rgba(230, 167, 31, 0.38), transparent 22rem), linear-gradient(135deg, #413b34, #181613);
  text-align: center;
}

.cta-band h2 {
  max-width: 840px;
  margin: 0 auto 12px;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.05em;
}

.cta-band p {
  max-width: 820px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.cta-actions {
  justify-content: center;
}

.footer {
  padding: 46px 0 28px;
  color: rgba(255, 255, 255, 0.76);
  background: #181613;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand-block {
  max-width: 620px;
}

.footer-logo {
  display: block;
  width: auto;
  height: 86px;
  margin: 0 0 14px;
}

.footer h3 {
  margin: 0 0 8px;
  color: var(--white);
  font-size: 20px;
}

.footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: var(--white);
  font-weight: 850;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  font-size: 13px;
}

.stage-grid {
  align-items: stretch;
}

.stage-overview {
  padding: 28px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.stage-visual {
  display: grid;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(230, 167, 31, 0.15), rgba(79, 116, 100, 0.12));
}

.stage-pill {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
}

.stage-pill b {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  border-radius: 22px;
  color: var(--ink);
  background: var(--gold);
  font-size: 26px;
}

.stage-pill:nth-child(2) b {
  color: var(--white);
  background: var(--green);
}

.stage-pill h3 {
  margin: 0 0 4px;
  font-size: 22px;
}

.stage-pill p {
  margin: 0;
  color: var(--ink-2);
}

.compare-card,
.compliance-card,
.process-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.compare-card.highlight {
  background: linear-gradient(135deg, rgba(230, 167, 31, 0.22), rgba(255, 255, 255, 0.72));
}

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

.compliance-card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
  font-size: 40px;
  line-height: 1;
}

.compliance-card:nth-child(2) strong,
.compliance-card:nth-child(3) strong {
  color: var(--green);
}

.process-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.process-card {
  background: rgba(255, 255, 255, 0.72);
}

.process-card .step-number {
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
}

.patent-grid {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.patent-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 90% 10%, rgba(230, 167, 31, 0.2), transparent 13rem),
    rgba(255, 255, 255, 0.72);
}

.patent-stamp {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  margin-bottom: 18px;
  padding: 8px 13px;
  border: 1px solid rgba(230, 167, 31, 0.4);
  border-radius: 999px;
  color: #755300;
  background: rgba(230, 167, 31, 0.17);
  font-size: 13px;
  font-weight: 1000;
  letter-spacing: 0.08em;
}

.patent-stamp::before {
  content: "◆";
  color: var(--gold);
}

.platform-card {
  min-height: 360px;
  padding: 26px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 78% 18%, rgba(79, 116, 100, 0.18), transparent 14rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(247, 239, 226, 0.78));
  box-shadow: var(--shadow-soft);
}

.phone-stack {
  position: relative;
  min-height: 300px;
}

.phone {
  position: absolute;
  border: 8px solid #2f2c28;
  border-radius: 32px;
  background: var(--white);
  box-shadow: 0 28px 60px rgba(47, 44, 40, 0.18);
  overflow: hidden;
}

.phone.one {
  width: 188px;
  height: 292px;
  right: 42%;
  top: 12px;
  transform: rotate(-8deg);
}

.phone.two {
  width: 162px;
  height: 250px;
  right: 10%;
  top: 48px;
  transform: rotate(9deg);
}

.phone-screen {
  height: 100%;
  padding: 22px 14px;
  background: linear-gradient(180deg, #fff8ea, #ffffff);
}

.phone-screen .dot {
  width: 46px;
  height: 46px;
  margin: 0 auto 18px;
  border-radius: 999px;
  background: var(--gold);
}

.phone-screen .line {
  height: 10px;
  margin: 10px 0;
  border-radius: 999px;
  background: rgba(47, 44, 40, 0.12);
}

.phone-screen .line.short {
  width: 60%;
}

.phone-screen .bars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: 8px;
  margin-top: 30px;
  height: 74px;
}

.phone-screen .bars span {
  display: block;
  border-radius: 999px 999px 4px 4px;
  background: linear-gradient(var(--green-2), var(--green));
}

.phone-screen .bars span:nth-child(1) { height: 42%; }
.phone-screen .bars span:nth-child(2) { height: 78%; }
.phone-screen .bars span:nth-child(3) { height: 56%; }
.phone-screen .bars span:nth-child(4) { height: 92%; }

.notice {
  padding: 16px;
  border: 1px solid rgba(230, 167, 31, 0.34);
  border-radius: 18px;
  background: rgba(255, 242, 203, 0.72);
  color: var(--ink-2);
  font-size: 14px;
}

.source-note {
  margin-top: 26px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 1020px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-header nav {
    position: fixed;
    inset: 82px 18px auto 18px;
    display: none;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 250, 241, 0.98);
    box-shadow: var(--shadow);
  }

  body.nav-open .site-header nav {
    display: block;
  }

  .nav-links {
    display: grid;
    gap: 8px;
  }

  .nav-links a {
    justify-content: flex-start;
    width: 100%;
  }

  .hero-grid,
  .page-hero-grid,
  .concept-grid,
  .path-wrap,
  .expert-grid,
  .stage-grid,
  .dual-grid,
  .patent-grid {
    grid-template-columns: 1fr;
  }

  .concept-visual,
  .path-card {
    position: relative;
    top: auto;
  }

  .grid-4,
  .process-grid,
  .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3,
  .mit-axis,
  .compliance-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .navbar {
    min-height: 78px;
  }

  .brand-logo {
    height: 54px;
  }

  .hero,
  .page-hero {
    padding: 54px 0 56px;
  }

  .hero h1,
  .page-hero h1 {
    letter-spacing: -0.045em;
  }

  .hero-lead,
  .page-lead,
  .section-lead,
  .cta-band p {
    font-size: 16px;
  }

  .hero-actions,
  .cta-actions,
  .card-actions {
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .section {
    padding: 64px 0;
  }

  .section-tight {
    padding: 42px 0;
  }

  .grid-2,
  .grid-4,
  .process-grid,
  .metric-strip,
  .compliance-grid {
    grid-template-columns: 1fr;
  }

  .safety-panel,
  .page-summary-card,
  .path-card,
  .expert-band,
  .cta-band,
  .stage-overview,
  .patent-card,
  .platform-card {
    border-radius: 22px;
    padding: 20px;
  }

  .safety-visual {
    min-height: 270px;
  }

  .cover-shell {
    width: 205px;
    height: 205px;
  }

  .help-button {
    width: 128px;
    height: 128px;
  }

  .help-button strong {
    font-size: 27px;
  }

  .concept-step,
  .stage-step,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    display: none;
  }

  .timeline-no {
    box-shadow: none;
  }

  .footer-grid,
  .footer-bottom {
    display: grid;
  }

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

  .stage-pill {
    grid-template-columns: 1fr;
  }

  .phone.one {
    right: auto;
    left: 10%;
  }

  .phone.two {
    right: 2%;
  }
}