:root {
  --ink: #0f2340;
  --ink-deep: #0f2340;
  --blue: #3a86c9;
  --blue-bright: #258cd1;
  --accent: #12a594;
  --cta: #f2a900;
  --cta-hover: #d99100;
  --accent-light: #dde6ef;
  --paper: #f8fafc;
  --paper-warm: #eef2f7;
  --line: rgba(15, 35, 64, 0.15);
  --muted: rgba(15, 35, 64, 0.68);
  --white: #ffffff;
  --shadow: 0 20px 60px rgba(15, 35, 64, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --max-width: 1180px;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue-bright);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-light);
  color: var(--ink-deep);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  overflow: hidden;
}

.site-header {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 88px;
  margin: 0 auto;
  padding: 0 max(24px, calc((100% - var(--max-width)) / 2));
  background: var(--ink);
  color: var(--white);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-name {
  white-space: nowrap;
}

.desktop-nav {
  display: flex;
  gap: 32px;
  margin-left: 90px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.83rem;
  font-weight: 700;
}

.desktop-nav a {
  transition: color 180ms ease;
}

.desktop-nav a:hover {
  color: var(--accent-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.language-select {
  appearance: none;
  background-color: transparent;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  padding: 6px 28px 6px 10px;
  cursor: pointer;
  transition: border-color 180ms ease, color 180ms ease;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='rgba(255,255,255,0.72)' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.language-select:hover {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--accent-light);
}

.language-select:focus {
  outline: none;
  border-color: var(--accent-light);
}

.language-select option {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.9);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 52px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 35, 64, 0.15);
}

.button span {
  font-size: 1.1rem;
  line-height: 1;
}

.button--small {
  min-height: 40px;
  padding: 0 18px;
  font-size: 0.76rem;
}

.button--dark {
  background: var(--white);
  color: var(--ink);
}

.button--primary {
  background: var(--cta);
  color: var(--ink);
}

.button--primary:hover {
  background: var(--cta-hover);
}

.button--light {
  background: var(--white);
  color: var(--ink);
}

.mobile-menu {
  display: none;
}

.section-pad {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  padding-top: 116px;
  padding-bottom: 116px;
}

.section-pad--top {
  padding-top: 0;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(430px, 1.08fr);
  gap: 78px;
  align-items: center;
  min-height: 650px;
  padding-top: 72px;
  /* page-hero と共通のネットワークメッシュ（トップページのheroの背後にも配置） */
  background-image:
    url("/assets/network-mesh.svg"),
    url("/assets/network-mesh.svg");
  background-repeat: no-repeat;
  background-position:
    right 60px top -40px,
    right -80px bottom -140px;
  background-size:
    500px auto,
    460px auto;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: -180px;
  right: -260px;
  width: 720px;
  height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 157, 221, 0.22), rgba(59, 157, 221, 0) 67%);
  content: "";
}

.hero::after {
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(15, 35, 64, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(15, 35, 64, 0.035) 1px, transparent 1px);
  background-position: center;
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
  content: "";
  pointer-events: none;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--accent);
  font-size: 0.67rem;
  font-weight: 900;
  letter-spacing: 0.18em;
}

.eyebrow span {
  display: inline-block;
  width: 28px;
  height: 2px;
  background: currentColor;
}

.eyebrow--light {
  color: var(--accent-light);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.065em;
}

h1 {
  max-width: 600px;
  margin-bottom: 27px;
  font-size: clamp(2.7rem, 3.6vw, 4rem);
  font-weight: 850;
}

h1 span {
  display: block;
  white-space: nowrap;
}

h1 em,
h2 em {
  color: var(--blue);
  font-style: normal;
}

.hero__lead {
  max-width: 500px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 2;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-bottom: 34px;
}

.text-link,
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 800;
}

/* 本文中のリンクは周囲の文章と区別できる色にする */
.page-content a:not(.button):not(.text-link):not(.arrow-link) {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content a:not(.button):not(.text-link):not(.arrow-link):hover,
.text-link:hover,
.arrow-link:hover {
  color: var(--blue-bright);
}

.text-link span,
.arrow-link span {
  color: var(--blue);
  font-size: 1.1rem;
  transition: transform 180ms ease;
}

.text-link:hover span,
.arrow-link:hover span {
  transform: translateY(3px);
}

.hero__notes {
  display: flex;
  flex-wrap: wrap;
  gap: 15px 20px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.hero__notes span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero__notes i {
  display: grid;
  width: 16px;
  height: 16px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--ink);
  font-size: 0.65rem;
  font-style: normal;
}

.hero__visual {
  position: relative;
  padding: 22px 0 0 22px;
}

.hero__visual::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 88%;
  height: 95%;
  border: 1px solid rgba(15, 35, 64, 0.16);
  border-radius: 30px;
  content: "";
}

.hero__visual img {
  position: relative;
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.visual-label {
  position: absolute;
  z-index: 2;
  font-size: 0.58rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.visual-label--top {
  top: 4px;
  right: 18px;
  color: var(--blue);
}

.visual-stamp {
  position: absolute;
  right: -26px;
  bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 170px;
  padding: 14px 17px;
  border: 1px solid rgba(15, 35, 64, 0.12);
  border-radius: 14px;
  background: rgba(248, 250, 252, 0.93);
  box-shadow: 0 12px 30px rgba(15, 35, 64, 0.12);
  color: var(--ink);
  font-size: 0.67rem;
  font-weight: 850;
  line-height: 1.45;
}

.stamp-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.16);
}

.signal-strip {
  background: var(--ink);
  color: var(--white);
}

.signal-strip__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
}

.signal-strip p {
  display: flex;
  align-items: center;
  gap: 17px;
  min-height: 98px;
  margin: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.76rem;
  font-weight: 700;
}

.signal-strip p:first-child {
  border-left: 1px solid rgba(255, 255, 255, 0.13);
  padding-left: 22px;
}

.signal-strip p:not(:first-child) {
  padding-left: 31px;
}

.signal-number {
  color: var(--accent-light);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.section-intro {
  display: grid;
  grid-template-columns: 1fr 0.78fr;
  gap: 80px;
  align-items: end;
}

.section-heading h2,
.security-section h2,
.pricing-preview h2,
.final-cta h2 {
  margin-bottom: 0;
  font-size: clamp(2.35rem, 4vw, 4rem);
  font-weight: 850;
}

.section-intro__body {
  max-width: 400px;
}

.section-intro__body p {
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 2;
}

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

.feature-card {
  min-height: 340px;
  padding: 30px;
  border-radius: var(--radius-md);
}

.feature-card--blue {
  background: #dde6ef;
}

.feature-card--neutral {
  background: #eef2f7;
}

.feature-card--sand {
  background: #f8fafc;
}

.feature-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 67px;
}

.feature-index {
  color: rgba(15, 35, 64, 0.5);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.feature-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(15, 35, 64, 0.18);
  border-radius: 50%;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--ink);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.feature-card h3 {
  margin-bottom: 13px;
  font-size: 1.24rem;
  font-weight: 850;
}

.feature-card p {
  margin-bottom: 23px;
  color: rgba(15, 35, 64, 0.7);
  font-size: 0.82rem;
  line-height: 1.9;
}

.feature-card__caption {
  color: rgba(15, 35, 64, 0.54);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.59rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.process-section {
  width: 100%;
  max-width: none;
  padding-right: max(24px, calc((100% - var(--max-width)) / 2));
  padding-left: max(24px, calc((100% - var(--max-width)) / 2));
  background: var(--ink);
  color: var(--white);
}

.process-section__header {
  display: grid;
  grid-template-columns: 1.2fr 0.65fr;
  gap: 60px;
  align-items: end;
  width: min(var(--max-width), 100%);
  margin: 0 auto 72px;
}

.process-section__header h2 {
  margin: 0;
  font-size: clamp(2.35rem, 4vw, 4rem);
  font-weight: 850;
}

.process-section__header h2 em {
  color: var(--accent-light);
}

.process-section__header > p {
  max-width: 390px;
  margin: 0;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.88rem;
  line-height: 2;
}

.process-list {
  width: min(var(--max-width), 100%);
  margin: 0 auto;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.process-step {
  display: grid;
  grid-template-columns: 96px 1fr 30px;
  gap: 28px;
  align-items: center;
  min-height: 130px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.process-step__number {
  color: var(--accent-light);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.process-step h3 {
  margin-bottom: 6px;
  font-size: 1.05rem;
  font-weight: 800;
}

.process-step p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.78rem;
}

.process-step__mark {
  color: var(--accent-light);
  font-size: 1.5rem;
  font-weight: 300;
}

.security-section {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 100px;
  align-items: center;
}

.security-section__copy > p:not(.eyebrow) {
  max-width: 420px;
  margin: 30px 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 2;
}

.security-callout {
  display: flex;
  gap: 14px;
  max-width: 500px;
  margin: 0 0 28px;
  padding: 17px 18px;
  border: 1px solid rgba(37, 140, 209, 0.22);
  border-radius: 14px;
  background: rgba(37, 140, 209, 0.08);
}

.security-callout__icon {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--blue-bright);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 900;
}

.security-callout strong {
  display: block;
  margin-bottom: 5px;
  font-size: 0.78rem;
  line-height: 1.55;
}

.security-callout p {
  margin: 0;
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.75;
}

.mode-stack {
  display: grid;
  gap: 15px;
}

.mode-card {
  padding: 27px 31px 25px;
  border-radius: var(--radius-md);
}

.mode-card--standard {
  background: var(--paper-warm);
}

.mode-card--passphrase {
  background: var(--ink);
  color: var(--white);
}

.mode-card__meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.61rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.mode-card--standard .mode-card__meta {
  color: var(--blue);
}

.mode-card--passphrase .mode-card__meta {
  color: var(--accent-light);
}

.mode-card h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
  font-weight: 850;
}

.mode-card p {
  max-width: 560px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.85;
}

.mode-card--passphrase p {
  color: rgba(255, 255, 255, 0.62);
}

.mode-card__line {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--blue);
  font-size: 0.64rem;
}

.mode-card--passphrase .mode-card__line {
  color: var(--accent-light);
}

.mode-card__line span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 5px color-mix(in srgb, currentColor 15%, transparent);
}

.mode-card__line b {
  font-weight: 800;
}

.mode-card__line i {
  font-size: 1rem;
  font-style: normal;
}

.pricing-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
  padding-top: 70px;
  padding-bottom: 64px;
}

/* セキュリティセクション直後の料金ブロックは余白を詰める */
.security-section + .pricing-preview {
  padding-top: 32px;
}

.pricing-preview__box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 30px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.45);
}

.pricing-preview__label {
  margin-bottom: 8px;
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.63rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.pricing-preview__copy {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.8;
}

.pricing-preview__benefit {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 380px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.7;
}

.pricing-preview__benefit-mark {
  display: grid;
  width: 25px;
  height: 25px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--cta);
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
}

.pricing-preview__benefit strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 0.8rem;
}

.final-cta {
  position: relative;
  max-width: none;
  margin-top: 0;
  margin-bottom: 72px;
  background: var(--blue);
  color: var(--white);
  text-align: center;
}

.final-cta::before,
.final-cta::after {
  position: absolute;
  border: 1px solid rgba(59, 157, 221, 0.18);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.final-cta::before {
  top: -230px;
  left: -120px;
  width: 450px;
  height: 450px;
}

.final-cta::after {
  right: -160px;
  bottom: -300px;
  width: 560px;
  height: 560px;
}

.final-cta__illustration {
  position: relative;
  width: 240px;
  margin: 0 auto 24px;
}

.final-cta__illustration img {
  display: block;
  width: 100%;
  height: auto;
}

.final-cta h2 {
  position: relative;
  margin-bottom: 20px;
}

.final-cta h2 em {
  color: var(--accent-light);
}

.final-cta > p:not(.eyebrow) {
  position: relative;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.final-cta .button {
  position: relative;
}

.site-footer {
  width: 100%;
  margin: 0 auto;
  padding: 72px max(24px, calc((100% - var(--max-width)) / 2)) 30px;
  background: var(--ink);
  color: var(--white);
}

.site-footer__main {
  display: flex;
  justify-content: space-between;
  width: min(var(--max-width), 100%);
  gap: 80px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.brand--footer {
  color: var(--white);
}

.footer-tagline {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.78rem;
}

.footer-company {
  display: grid;
  gap: 2px;
  margin: 25px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.68rem;
  line-height: 1.5;
}

.footer-company span {
  color: var(--accent-light);
  font-size: 0.6rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.footer-company strong {
  color: var(--white);
  font-size: 0.78rem;
}

.footer-company small {
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.65rem;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.footer-links div {
  display: grid;
  align-content: start;
  gap: 8px;
  min-width: 115px;
}

.footer-links p {
  margin-bottom: 7px;
  color: var(--accent-light);
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.73rem;
}

.footer-links a:hover {
  color: var(--accent-light);
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  width: min(var(--max-width), 100%);
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.5);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
}

@media (max-width: 980px) {
  .desktop-nav {
    gap: 20px;
    margin-left: 30px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 55px;
    padding-top: 52px;
  }

  .hero__copy {
    max-width: 720px;
  }

  .hero__visual {
    width: min(680px, 100%);
    margin: 0 auto;
  }

  .section-intro,
  .security-section,
  .pricing-preview {
    gap: 50px;
  }
}

@media (max-width: 720px) {
  .site-header,
  .section-pad,
  .signal-strip__inner {
    width: min(100% - 36px, var(--max-width));
  }

  .site-header {
    width: 100%;
    min-height: 76px;
    padding: 0 18px;
  }

  .desktop-nav,
  .header-actions {
    display: none;
  }

  .mobile-menu {
    position: relative;
    display: block;
  }

  .mobile-menu summary {
    display: grid;
    width: 42px;
    height: 42px;
    padding: 10px;
    cursor: pointer;
    list-style: none;
    place-items: center;
    gap: 4px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 12px;
  }

  .mobile-menu summary::-webkit-details-marker {
    display: none;
  }

  .mobile-menu summary span {
    display: block;
    width: 18px;
    height: 1.5px;
    background: var(--white);
  }

  .mobile-menu nav {
    position: absolute;
    top: 52px;
    right: 0;
    display: grid;
    min-width: 190px;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 16px;
    background: rgba(15, 35, 64, 0.98);
    box-shadow: var(--shadow);
  }

  .mobile-menu nav a {
    padding: 12px 13px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 800;
  }

  .mobile-menu nav a:hover {
    background: rgba(37, 140, 209, 0.24);
  }

  .section-pad {
    padding-top: 82px;
    padding-bottom: 82px;
  }

  .hero {
    min-height: auto;
    padding-top: 45px;
  }

  h1 {
    font-size: clamp(1.9rem, 8.5vw, 3rem);
  }

  .hero__lead {
    font-size: 0.9rem;
  }

  .hero__actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 19px;
  }

  .hero__visual {
    padding: 14px 0 0 10px;
  }

  .visual-stamp {
    right: -6px;
    bottom: 12px;
  }

  .signal-strip__inner {
    display: block;
    padding: 14px 0;
  }

  .signal-strip p,
  .signal-strip p:first-child,
  .signal-strip p:not(:first-child) {
    min-height: 48px;
    padding: 0;
    border: 0;
  }

  .section-intro,
  .feature-grid,
  .process-section__header,
  .security-section,
  .pricing-preview {
    grid-template-columns: 1fr;
  }

  .section-intro {
    gap: 32px;
  }

  .feature-card {
    min-height: auto;
  }

  .feature-card__top {
    margin-bottom: 54px;
  }

  .process-section {
    padding-right: 18px;
    padding-left: 18px;
  }

  .process-section__header {
    gap: 30px;
    margin-bottom: 45px;
  }

  .process-step {
    grid-template-columns: 38px 1fr 20px;
    gap: 16px;
    min-height: 125px;
  }

  .process-step p {
    font-size: 0.73rem;
  }

  .security-section,
  .pricing-preview {
    gap: 38px;
  }

  .mode-card {
    padding: 23px 21px;
  }

  .pricing-preview {
    padding-top: 65px;
  }

  .security-section + .pricing-preview {
    padding-top: 40px;
  }

  .pricing-preview__box {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px;
  }

  .site-footer {
    width: 100%;
    margin-top: 0;
    margin-bottom: 0;
    padding-top: 55px;
    padding-right: 18px;
    padding-left: 18px;
  }

  .final-cta {
    margin-bottom: 48px;
  }

  .site-footer__main {
    align-items: flex-start;
    flex-direction: column;
    gap: 44px;
    padding-bottom: 42px;
  }

  .footer-links {
    gap: 35px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Inner pages */
.page-main {
  min-height: 70vh;
}

.page-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 76px max(24px, calc((100% - var(--max-width)) / 2)) 78px;
  border-bottom: 1px solid var(--line);
  /* 既存の色味（paper-warm + blue）を保ったネットワークをイメージした抽象背景:
     ノードと接続線のSVGメッシュ2枚 + 柔らかい光の広がり */
  background-image:
    url("/assets/network-mesh.svg"),
    url("/assets/network-mesh.svg"),
    radial-gradient(circle at 88% 18%, transparent 132px, rgba(58, 134, 201, 0.16) 133px, transparent 136px),
    radial-gradient(46rem 30rem at 84% -18%, rgba(58, 134, 201, 0.11), transparent 62%),
    radial-gradient(40rem 26rem at -8% 112%, rgba(37, 140, 209, 0.07), transparent 60%);
  background-repeat: no-repeat;
  background-position:
    right 40px top -70px,
    right -70px bottom -60px,
    88% 18%,
    84% -18%,
    -8% 112%;
  background-size:
    540px auto,
    470px auto,
    auto,
    auto,
    auto;
  background-color: var(--paper-warm);
}

.page-hero::before,
.page-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
}

/* 右上: わずかに傾いた円弧の輪郭 */
.page-hero::before {
  top: -150px;
  right: 150px;
  width: 330px;
  height: 330px;
  border: 2px solid rgba(58, 134, 201, 0.10);
  border-radius: 38%;
  transform: rotate(24deg);
}

/* 左下: 大きな円の輪郭 */
.page-hero::after {
  bottom: -210px;
  left: -70px;
  width: 430px;
  height: 430px;
  border: 2px solid rgba(58, 134, 201, 0.12);
  border-radius: 50%;
}

.page-hero__inner,
.page-content {
  width: min(var(--max-width), 100%);
  margin: 0 auto;
}

.page-hero h1 {
  max-width: 780px;
  margin: 0 0 22px;
  font-size: clamp(2.5rem, 5vw, 4.8rem);
}

.page-hero h1 em {
  color: var(--blue);
  font-style: normal;
}

.page-hero__lead {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 2;
}

.page-breadcrumb {
  display: flex;
  gap: 9px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
}

.page-breadcrumb a:hover {
  color: var(--blue);
}

.page-content {
  padding-top: 78px;
  padding-bottom: 100px;
}

.page-content--narrow {
  max-width: 840px;
}

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

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

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

.content-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.content-card--soft {
  border-color: transparent;
  background: var(--paper-warm);
}

.content-card--blue {
  border-color: transparent;
  background: var(--ink);
  color: var(--white);
}

.content-card h2,
.content-card h3 {
  margin-bottom: 14px;
  font-size: 1.25rem;
  font-weight: 850;
}

.content-card h2 {
  font-size: 1.55rem;
}

.content-card p {
  margin-bottom: 13px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.9;
}

.content-card--blue p {
  color: rgba(255, 255, 255, 0.67);
}

.content-card p:last-child {
  margin-bottom: 0;
}

.content-card ul,
.content-card ol,
.prose ul,
.prose ol {
  margin: 14px 0 0;
  padding-left: 1.3em;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.9;
}

.content-card--blue ul,
.content-card--blue ol {
  color: rgba(255, 255, 255, 0.7);
}

.content-card li + li,
.prose li + li {
  margin-top: 7px;
}

.card-index {
  display: block;
  margin-bottom: 38px;
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

/* content-card の説明に合わせたアイコン（maskで1色化、角丸枠なし） */
.card-icon {
  display: block;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
}

.card-icon::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: var(--blue);
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
}

.card-icon--storage {
  --icon: url("/assets/icons/storage.svg");
}

.card-icon--lock {
  --icon: url("/assets/icons/lock.svg");
}

.card-icon--unlock {
  --icon: url("/assets/icons/unlock.svg");
}

.card-icon--user-check {
  --icon: url("/assets/icons/user-check.svg");
}

.card-icon--users {
  --icon: url("/assets/icons/users.svg");
}

.card-icon--document {
  --icon: url("/assets/icons/document.svg");
}

.card-icon--clock {
  --icon: url("/assets/icons/clock.svg");
}

.card-icon--plug {
  --icon: url("/assets/icons/plug.svg");
}

.card-icon--key {
  --icon: url("/assets/icons/key.svg");
}

.card-icon--mail {
  --icon: url("/assets/icons/mail.svg");
}

.card-icon--cloud {
  --icon: url("/assets/icons/cloud.svg");
}

.card-icon--server {
  --icon: url("/assets/icons/server.svg");
}

.card-icon--shield {
  --icon: url("/assets/icons/shield.svg");
}

/* 濃い青カード上では白いアイコンにする */
.content-card--blue .card-icon::after {
  background: var(--white);
}

.content-card--blue .card-index {
  color: var(--accent-light);
}

.page-section + .page-section {
  margin-top: 78px;
}

/* テーブルの直後にセクションが続く場合の間隔（例: subprocessors の変更通知） */
.data-table-wrap + .page-section {
  margin-top: 56px;
}

.data-table-wrap + .section-lead {
  margin-top: 30px;
}

.page-section > h2 {
  margin: 0 0 27px;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  font-weight: 850;
}

.page-section > h2 em {
  color: var(--blue);
  font-style: normal;
}

.section-lead {
  margin: -10px 0 30px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 2;
}

.page-flow-image {
  display: block;
  width: 100%;
  max-width: 900px;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 30px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--line);
}

.stat-item {
  padding: 25px;
  background: var(--white);
}

.stat-item strong {
  display: block;
  margin-bottom: 6px;
  color: var(--blue);
  font-size: 1.45rem;
  letter-spacing: -0.04em;
}

.stat-item span {
  color: var(--muted);
  font-size: 0.72rem;
}

.step-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.step-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 22px;
  padding: 27px 0;
  border-bottom: 1px solid var(--line);
}

.step-item__number {
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 900;
}

.step-item h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  font-weight: 850;
}

.step-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.8;
}

.notice {
  display: flex;
  gap: 14px;
  margin: 25px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--blue-bright);
  background: rgba(37, 140, 209, 0.08);
  color: var(--ink);
  font-size: 0.8rem;
  line-height: 1.8;
}

/* 1つのグループ = マーク + 本文。notice内に複数並べられる */
.notice__group {
  display: flex;
  gap: 14px;
}

.notice--stacked {
  flex-direction: column;
  gap: 18px;
}

.notice strong {
  display: block;
  margin-bottom: 3px;
}

.notice__mark {
  color: var(--blue-bright);
  font-weight: 900;
}

.data-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 0.76rem;
  text-align: left;
}

.pricing-comparison-table {
  table-layout: fixed;
}

.pricing-comparison-table th:first-child,
.pricing-comparison-table td:first-child {
  width: 22%;
}

.pricing-comparison-table th:not(:first-child),
.pricing-comparison-table td:not(:first-child) {
  width: 26%;
}

.pricing-comparison-table tbody th {
  white-space: normal;
}

.data-table th,
.data-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table th {
  background: var(--paper-warm);
  color: var(--ink);
  font-size: 0.68rem;
  font-weight: 900;
  white-space: nowrap;
}

.data-table td {
  color: var(--muted);
  line-height: 1.7;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.price-card {
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.price-card--featured {
  border-color: var(--blue-bright);
  box-shadow: 0 15px 40px rgba(37, 140, 209, 0.15);
}

.price-card__label {
  margin-bottom: 24px;
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.price-card h2 {
  margin-bottom: 10px;
  font-size: 1.45rem;
}

.price-card__price {
  margin-bottom: 25px;
  color: var(--ink);
  font-size: 2.05rem;
  font-weight: 850;
  letter-spacing: -0.06em;
}

.price-card__price small {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
}

.price-card ul {
  margin-bottom: 30px;
}

.price-card .button {
  width: 100%;
  margin-top: auto;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-size: 0.92rem;
  font-weight: 800;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  color: var(--blue);
  content: "+";
  font-size: 1.3rem;
  font-weight: 300;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 720px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.9;
}

.prose {
  max-width: 820px;
  color: var(--muted);
}

.prose h2 {
  margin: 52px 0 14px;
  color: var(--ink);
  font-size: 1.4rem;
  font-weight: 850;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin: 28px 0 10px;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 850;
}

.prose p {
  margin-bottom: 15px;
  font-size: 0.84rem;
  line-height: 2;
}

.prose strong {
  color: var(--ink);
}

.prose a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose__meta {
  margin-bottom: 48px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.65rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 18px;
}

.contact-item {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
}

.contact-item__label {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.contact-item strong {
  display: block;
  font-size: 1rem;
}

.contact-item p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.8;
}

.status-dot {
  display: inline-block;
  width: 11px;
  height: 11px;
  margin-right: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.14);
  vertical-align: 0.06em;
}

@media (max-width: 900px) {
  .content-grid--three,
  .price-grid {
    grid-template-columns: 1fr 1fr;
  }

  .content-grid--wide,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-hero {
    padding: 54px 18px 58px;
  }

  .page-hero h1 {
    font-size: clamp(2.25rem, 11vw, 3.4rem);
  }

  .page-content {
    width: min(100% - 36px, var(--max-width));
    padding-top: 58px;
    padding-bottom: 72px;
  }

  .content-grid,
  .content-grid--three,
  .price-grid {
    grid-template-columns: 1fr;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .step-item {
    grid-template-columns: 38px 1fr;
    gap: 16px;
  }

  .data-table {
    min-width: 590px;
  }
}

/* 問い合わせフォーム */
.contact-form {
  max-width: 640px;
}
.form-field {
  margin-bottom: 18px;
}
.form-field label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd5d5;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: inherit;
}
.form-field textarea {
  resize: vertical;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid #1e3a5f;
  outline-offset: 1px;
  border-color: #1e3a5f;
}
.form-error,
.form-success {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 18px;
}
.form-error {
  background: #fdecec;
  color: #8f1d1d;
}
.form-success {
  background: #e6f4ea;
  color: #1a5c2e;
}
.button:disabled {
  opacity: 0.6;
  cursor: wait;
}

/* サービス開始予定の表示 */
.hero__launch {
  margin-top: 14px;
  font-weight: 700;
}