:root {
  --bg: #070b12;
  --bg-elevated: #0d1420;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-solid: #121a28;
  --border: rgba(255, 255, 255, 0.08);
  --text: #eef2f8;
  --muted: #8fa3bc;
  --accent: #4db8ff;
  --accent-2: #5ee4a8;
  --accent-warm: #f0a060;
  --danger: #ff6b6b;
  --font: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  --max: 68rem;
  --radius: 16px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  --glow: 0 0 60px rgba(77, 184, 255, 0.15);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--site-header-offset, 7rem);
}

main > [id] {
  scroll-margin-top: var(--site-header-offset, 7rem);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(77, 184, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 20%, rgba(94, 228, 168, 0.1), transparent 50%),
    radial-gradient(ellipse 50% 30% at 50% 100%, rgba(240, 160, 96, 0.06), transparent 45%);
  pointer-events: none;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover {
  color: #8fd4ff;
}

.site-header {
  border-bottom: 1px solid transparent;
  background: rgba(7, 11, 18, 0.72);
  backdrop-filter: blur(16px) saturate(1.2);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header--scrolled {
  border-color: var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.site-header__inner {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  -webkit-text-fill-color: var(--muted);
  color: var(--muted);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

nav li {
  display: flex;
  align-items: center;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 600;
}

nav a.nav-cta {
  background: linear-gradient(135deg, rgba(77, 184, 255, 0.25), rgba(94, 228, 168, 0.2));
  border: 1px solid rgba(77, 184, 255, 0.35);
  color: #fff;
}

.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-dropdown__toggle {
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: inherit;
  line-height: 1.75;
  margin: 0;
  padding: 0.45rem 0.85rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s, background 0.2s;
}

.nav-dropdown__toggle:hover,
.nav-dropdown.is-open .nav-dropdown__toggle {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 600;
}

.nav-dropdown__menu {
  display: none;
  list-style: none;
  margin: 0.35rem 0 0;
  padding: 0.35rem;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 16.5rem;
  z-index: 50;
  background: rgba(12, 18, 28, 0.98);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.nav-dropdown.is-open .nav-dropdown__menu {
  display: block;
}

.nav-dropdown__menu a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: calc(var(--radius) - 4px);
  font-size: 0.875rem;
  line-height: 1.4;
  white-space: normal;
}

.nav-dropdown__menu a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-toggle {
  display: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.3rem;
  width: 1.15rem;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header--nav-open .nav-toggle__bars span:nth-child(1) {
  transform: translateY(0.4rem) rotate(45deg);
}

.site-header--nav-open .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header--nav-open .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-0.4rem) rotate(-45deg);
}

@media (max-width: 899px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 0.35rem);
    left: 0;
    right: 0;
    padding: 0.5rem;
    background: rgba(10, 15, 24, 0.98);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

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

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }

  .site-nav li {
    display: block;
    width: 100%;
  }

  .site-nav a,
  .site-nav .nav-dropdown__toggle {
    display: block;
    width: 100%;
    text-align: left;
    border-radius: calc(var(--radius) - 6px);
  }

  .nav-dropdown {
    display: block;
    width: 100%;
  }

  .nav-dropdown__menu {
    position: static;
    display: none;
    margin: 0.15rem 0 0.35rem;
    min-width: 0;
    box-shadow: none;
    border: none;
    background: rgba(255, 255, 255, 0.03);
  }

  .nav-dropdown.is-open .nav-dropdown__menu {
    display: block;
  }
}

body.site-nav-open {
  overflow: hidden;
}

main {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

.hero {
  position: relative;
  padding: 2rem 0 4rem;
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    min-height: 420px;
  }
}

.hero-copy {
  text-align: center;
}

@media (min-width: 900px) {
  .hero-copy {
    text-align: left;
  }
}

.hero-visual-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-wrap::before {
  content: "";
  position: absolute;
  width: 90%;
  height: 90%;
  background:
    radial-gradient(circle at 30% 40%, rgba(77, 184, 255, 0.22) 0%, transparent 55%),
    radial-gradient(circle at 70% 60%, rgba(94, 228, 168, 0.14) 0%, transparent 50%);
  animation: pulse-glow 5s ease-in-out infinite;
}

.hero-visual {
  position: relative;
  width: min(100%, 520px);
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.4)) drop-shadow(0 0 40px rgba(77, 184, 255, 0.12));
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 1rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(94, 228, 168, 0.35);
  background: rgba(94, 228, 168, 0.08);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.85rem);
  line-height: 1.2;
  margin: 0 0 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero h1 .gradient {
  background: linear-gradient(120deg, #fff 20%, var(--accent) 55%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .lead {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 36em;
  margin: 0 auto 1.75rem;
}

@media (min-width: 900px) {
  .hero .lead {
    margin-left: 0;
    margin-right: 0;
  }
}

.hero .lead strong {
  color: var(--text);
}

.hero .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

@media (min-width: 900px) {
  .hero .actions {
    justify-content: flex-start;
  }
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 2rem;
}

@media (min-width: 900px) {
  .trust-row {
    justify-content: flex-start;
  }
}

.trust-item {
  font-size: 0.82rem;
  padding: 0.4rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  backdrop-filter: blur(8px);
}

.trust-item--live {
  border-color: rgba(94, 228, 168, 0.35);
  color: #b8f0d4;
}

.trust-item--closed {
  border-color: rgba(255, 107, 107, 0.35);
  color: #ffc9c9;
}

section {
  margin-bottom: 4.5rem;
}

.section-head {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  margin: 0 0 0.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--muted);
  max-width: 36em;
  margin: 0 auto;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

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

.glass-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.35s ease,
    box-shadow 0.35s ease;
}

.glass-card:hover {
  transform: translateY(-6px);
  border-color: rgba(77, 184, 255, 0.25);
  box-shadow: var(--shadow), var(--glow);
}

.card-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 1rem;
  padding: 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
}

.product-split {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 700px) {
  .product-split {
    grid-template-columns: 1fr 1fr;
  }
}

.pipeline-flow {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 800px) {
  .pipeline-flow {
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: stretch;
    gap: 0.75rem;
  }
}

.pipeline-step {
  position: relative;
}

.pipeline-step-num {
  display: inline-flex;
  width: 1.75rem;
  height: 1.75rem;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #2a6fa3);
  color: #fff;
  margin-bottom: 0.65rem;
}

.pipeline-arrow {
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1.5rem;
  opacity: 0.5;
  padding-top: 2.5rem;
}

.pipeline-arrow--mutual {
  font-size: 1.75rem;
  opacity: 0.85;
  background: linear-gradient(90deg, #ff9e9e, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 800px) {
  .pipeline-arrow {
    display: flex;
  }
}

.pipeline-arrow--mobile {
  display: flex;
  justify-content: center;
  padding: 0.25rem 0;
  color: var(--muted);
  opacity: 0.45;
}

@media (min-width: 800px) {
  .pipeline-arrow--mobile {
    display: none;
  }
}

.flow-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: center;
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.flow-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.flow-legend .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot--osint { background: var(--accent); }
.dot--attack { background: var(--danger); }
.dot--defense { background: var(--accent-2); }

.mutual-loop {
  margin: 2rem 0 1.5rem;
  padding: 2rem 1.5rem;
  text-align: center;
  border-color: rgba(94, 228, 168, 0.2);
  background: linear-gradient(
    135deg,
    rgba(255, 107, 107, 0.06) 0%,
    rgba(255, 255, 255, 0.04) 45%,
    rgba(94, 228, 168, 0.08) 100%
  );
}

.mutual-loop h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.mutual-loop > p {
  margin: 0 auto 1.5rem;
  max-width: 32em;
  font-size: 0.95rem;
  color: var(--muted);
}

.mutual-loop__diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .mutual-loop__diagram {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 1.25rem;
  }
}

.mutual-node {
  min-width: 9.5rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  border: 1px solid var(--border);
}

.mutual-node--attack {
  background: rgba(255, 107, 107, 0.1);
  border-color: rgba(255, 107, 107, 0.35);
  color: #ffc9c9;
}

.mutual-node--defense {
  background: rgba(94, 228, 168, 0.1);
  border-color: rgba(94, 228, 168, 0.35);
  color: #b8f0d4;
}

.mutual-node small {
  font-weight: 400;
  font-size: 0.75rem;
  opacity: 0.85;
  display: block;
  margin-top: 0.2rem;
}

.pipeline-connector {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 0 1rem;
  letter-spacing: 0.05em;
}

.pipeline-flow--dual {
  margin-bottom: 1.5rem;
}

.tool-pair {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0 1.15rem;
}

.tool-chip {
  flex: 1 1 10rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.88rem;
}

.tool-chip strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.95rem;
}

.tool-chip span {
  color: var(--muted);
  font-size: 0.82rem;
}

.tool-chip--tool {
  background: rgba(240, 160, 96, 0.08);
  border-color: rgba(240, 160, 96, 0.25);
}

.tool-chip--tool strong {
  color: #f0c090;
}

.tool-chip--ai {
  background: rgba(255, 107, 107, 0.08);
  border-color: rgba(255, 107, 107, 0.25);
}

.tool-chip--ai strong {
  color: #ffc9c9;
}

.arch-clarify {
  max-width: 40rem;
  margin: 0 auto 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  border: 1px solid rgba(77, 184, 255, 0.25);
  background: rgba(77, 184, 255, 0.06);
  font-size: 0.92rem;
  color: var(--muted);
  text-align: center;
}

.arch-clarify strong {
  color: var(--text);
}

.arch-diagram {
  display: block;
  width: min(100%, 600px);
  margin: 0 auto 2rem;
  filter: drop-shadow(0 12px 40px rgba(0, 0, 0, 0.35));
}

.arch-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 40rem;
  margin: 0 auto 2rem;
}

.arch-base .card-icon {
  display: block;
  margin: 0 auto 0.75rem;
}

.arch-base .tool-pair {
  justify-content: center;
}

.arch-stack .arch-base.glass-card {
  box-shadow: none;
}

.arch-stack .arch-loop-wrap.glass-card {
  box-shadow: var(--shadow);
}

.flow-card {
  padding: 1.5rem 1.75rem;
}

.flow-card__title {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.section-footnote {
  max-width: calc(var(--max) + 4rem);
  margin: 1.25rem auto 0;
  padding: 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.arch-base {
  border-radius: var(--radius) var(--radius) 0 0;
  border: 1px solid rgba(77, 184, 255, 0.35);
  border-bottom: none;
  background: linear-gradient(180deg, rgba(30, 90, 138, 0.2) 0%, rgba(77, 184, 255, 0.06) 100%);
  padding: 1.5rem 1.35rem 1.75rem;
  text-align: center;
}

.arch-base h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  color: var(--accent);
}

.arch-base > p {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.arch-loop-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius) var(--radius);
  background: rgba(255, 255, 255, 0.02);
  padding: 1.5rem 1.25rem 1.35rem;
}

.arch-loop-wrap::before {
  content: "";
  position: absolute;
  left: 15%;
  right: 15%;
  top: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.arch-loop-label {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

.arch-loop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

@media (min-width: 520px) {
  .arch-loop-inner {
    flex-direction: row;
    justify-content: center;
    align-items: stretch;
  }
}

.arch-node {
  flex: 1 1 9rem;
  max-width: 14rem;
  padding: 1.1rem 1rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border);
}

.arch-node--attack {
  background: rgba(255, 107, 107, 0.08);
  border-color: rgba(255, 107, 107, 0.3);
}

.arch-node--defense {
  background: rgba(94, 228, 168, 0.08);
  border-color: rgba(94, 228, 168, 0.3);
}

.arch-node h4 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.arch-node-sub {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-transform: uppercase;
}

.arch-node p:last-child {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.arch-node p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.arch-bidir {
  font-size: 1.75rem;
  line-height: 1;
  padding: 0.5rem 0;
  background: linear-gradient(90deg, #ff9e9e, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.arch-fl {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px dashed rgba(94, 228, 168, 0.35);
  background: rgba(94, 228, 168, 0.05);
  text-align: left;
}

.arch-fl-label {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.arch-fl-desc {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.arch-fl-list {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.arch-fl-list li + li {
  margin-top: 0.35rem;
}

.arch-feedback {
  display: grid;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}

.arch-feedback-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--muted);
  text-align: left;
}

.arch-feedback-arrow {
  flex-shrink: 0;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.arch-feedback-arrow--down {
  color: var(--accent);
}

.arch-feedback-arrow--up {
  color: var(--muted);
}

.round-flow {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.round-step {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem 1rem;
  align-items: start;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  font-size: 0.92rem;
}

.round-step strong {
  color: var(--text);
}

.round-step-num {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--surface);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--accent);
}

.mutual-arrows {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.mutual-arrows__fwd {
  color: #ff9e9e;
}

.mutual-arrows__back {
  color: var(--accent-2);
}

.mutual-arrows__bidir {
  display: none;
  font-size: 1.75rem;
  line-height: 1;
  background: linear-gradient(90deg, #ff9e9e, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 640px) {
  .mutual-arrows {
    min-width: 7rem;
  }

  .mutual-arrows__bidir {
    display: block;
    font-size: 2rem;
    margin-bottom: 0.35rem;
  }
}

.mutual-loop__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}

.mutual-loop__tags span {
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.product-card--live {
  border-color: rgba(94, 228, 168, 0.3);
  background: linear-gradient(160deg, rgba(94, 228, 168, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
}

.product-card--closed {
  border-color: rgba(255, 107, 107, 0.25);
  background: linear-gradient(160deg, rgba(255, 107, 107, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
}

.product-card h3 {
  margin: 0.75rem 0 0.65rem;
  font-size: 1.35rem;
}

.product-card > p,
.product-card li {
  color: var(--muted);
  font-size: 0.95rem;
}

.product-card ul {
  margin: 0 0 1.25rem;
  padding-left: 1.2rem;
}

.product-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

.product-status--live {
  background: rgba(94, 228, 168, 0.15);
  color: var(--accent-2);
  border: 1px solid rgba(94, 228, 168, 0.35);
}

.product-status--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: blink 2s ease infinite;
}

.product-status--closed {
  background: rgba(255, 107, 107, 0.12);
  color: #ff9e9e;
  border: 1px solid rgba(255, 107, 107, 0.3);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.pillar-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 800px) {
  .pillar-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.pillar-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  background: rgba(77, 184, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(77, 184, 255, 0.25);
}

.pillar-tag--offense {
  background: rgba(255, 107, 107, 0.1);
  color: #ff9e9e;
  border-color: rgba(255, 107, 107, 0.3);
}

.pillar-tag--defense {
  background: rgba(94, 228, 168, 0.1);
  color: var(--accent-2);
  border-color: rgba(94, 228, 168, 0.3);
}

.pillar h3 {
  margin: 0.65rem 0 0.5rem;
}

.pillar-tags + h3 {
  margin-top: 0.65rem;
}

.pillar > p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--accent);
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.pricing-card {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 1.5rem 1.75rem;
}

.pricing-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.pricing-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.pricing-table th,
.pricing-table td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.pricing-table th {
  background: var(--surface-solid);
  color: var(--text);
  font-weight: 600;
}

.pricing-table td:nth-child(2) {
  white-space: nowrap;
  color: var(--text);
  font-weight: 600;
}

.pricing-table td.pricing-table__price--stacked {
  white-space: normal;
}

.pricing-table__sub {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85em;
  font-weight: 500;
  color: var(--muted);
}

.pricing-notes {
  margin: 0 0 1.25rem;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.pricing-notes li + li {
  margin-top: 0.35rem;
}

.pricing-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

.steps {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  text-align: center;
  position: relative;
  overflow: hidden;
}

.step::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.3s;
}

.step:hover::after {
  opacity: 1;
}

.step-num {
  display: inline-flex;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), #2a6fa3);
  color: #fff;
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 0.85rem;
  font-size: 1rem;
  box-shadow: 0 8px 20px rgba(77, 184, 255, 0.35);
}

.step h3 {
  margin: 0 0 0.5rem;
}

.step p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.split {
  display: grid;
  gap: 2rem;
  padding: 2rem 1.75rem;
}

@media (min-width: 640px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.split h3 {
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
  color: var(--accent);
}

.split ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.note {
  background: rgba(77, 184, 255, 0.08);
  border: 1px solid rgba(77, 184, 255, 0.2);
  border-radius: var(--radius);
  padding: 1.15rem 1.35rem;
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 44em;
  margin: 2rem auto 0;
  text-align: center;
}

.note strong {
  color: var(--text);
}

.note--technical {
  text-align: left;
  margin-top: 1.5rem;
}

.note--technical summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
}

.note--technical summary::-webkit-details-marker {
  display: none;
}

.note--technical summary::before {
  content: "▸ ";
  color: var(--accent);
}

.note--technical[open] summary::before {
  content: "▾ ";
}

.note--technical p {
  margin: 0.75rem 0 0;
  font-size: 0.88rem;
}

.cta {
  position: relative;
  text-align: center;
  padding: 3rem 1.75rem;
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid rgba(77, 184, 255, 0.3);
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1e5a8a 0%, #0d2840 40%, #1a3d2e 100%);
  z-index: 0;
}

.cta::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../images/hero-visual.svg") center / 120% no-repeat;
  opacity: 0.12;
  z-index: 0;
}

.cta > * {
  position: relative;
  z-index: 1;
}

.cta h2 {
  color: #fff;
  margin: 0 0 0.75rem;
  font-size: 1.65rem;
}

.cta p {
  margin: 0 auto 1.75rem;
  max-width: 28em;
  color: rgba(255, 255, 255, 0.85);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.65rem;
  background: linear-gradient(135deg, #fff 0%, #e8f4fc 100%);
  color: #0d2840;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
  font-size: 0.98rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(77, 184, 255, 0.35);
  color: #0d2840;
}

.btn--primary-glow {
  background: linear-gradient(135deg, var(--accent) 0%, #2a8fd4 100%);
  color: #fff;
}

.btn--primary-glow:hover {
  color: #fff;
}

.btn--outline {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: none;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.hero .btn--outline {
  backdrop-filter: blur(8px);
}

.cta .btn--outline {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn--compact {
  padding: 0.55rem 1.15rem;
  font-size: 0.88rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.88rem;
  color: var(--muted);
  background: var(--bg-elevated);
}

.site-footer p {
  margin: 0 0 0.65rem;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

.site-footer__legal {
  text-align: center;
  line-height: 1.65;
}

.site-footer__copy {
  margin-top: 0.85rem;
  font-size: 0.82rem;
}

.site-footer a {
  color: var(--accent);
}

.contact-page .hero-grid {
  min-height: auto;
}

.contact-hero h1 {
  font-size: clamp(1.85rem, 4vw, 2.35rem);
  margin: 0 0 0.75rem;
}

.contact-box {
  max-width: 36rem;
}

.contact-box dt {
  font-weight: 600;
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-box dd {
  margin: 0.3rem 0 0;
  font-size: 1.1rem;
}

.contact-box__title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.contact-box__intro {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-box__intro strong {
  color: var(--text);
}

.contact-box__note {
  margin: 1.25rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.contact-hero .lead--compact {
  margin-top: 1rem;
  font-size: 1rem;
}

.contact-inquiry--spaced {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
}

.contact-card--spaced {
  margin-top: 1.5rem;
  padding: 1.5rem 1.75rem;
}

.contact-card__title {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.note--contact {
  text-align: left;
  margin-top: 1.5rem;
}

.policy-section--spaced {
  margin-top: 3rem;
}

.policy-section__title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.policy-section__text {
  color: var(--muted);
}

.back-link {
  margin-top: 2.5rem;
}

.contact-inquiry__title {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.contact-inquiry__lead {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.contact-inquiry__lead strong {
  color: var(--text);
}

.contact-inquiry__warn {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 180, 80, 0.35);
  background: rgba(255, 180, 80, 0.08);
  font-size: 0.88rem;
  color: var(--muted);
}

.contact-inquiry__warn strong {
  color: var(--text);
}

.contact-checklist {
  margin: 0;
  color: var(--muted);
  padding-left: 1.2rem;
}

.inquiry-template {
  margin: 0 0 1rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.inquiry-template__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.contact-inquiry__hint {
  margin: 0.75rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.policy-section {
  max-width: 42em;
}

@media (max-width: 899px) {
  .hero-copy {
    order: 2;
  }

  .hero-visual-wrap {
    order: 1;
  }
}

@media (max-width: 600px) {
  html {
    scroll-padding-top: var(--site-header-offset, 10.5rem);
  }

  main > [id] {
    scroll-margin-top: var(--site-header-offset, 10.5rem);
  }

  .article-hero {
    padding-top: calc(var(--site-header-offset, 10.5rem) + 0.25rem);
  }

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

  nav ul {
    width: 100%;
  }

  .nav-dropdown__menu {
    position: static;
    min-width: 0;
    width: 100%;
    margin-top: 0.25rem;
  }

  .section-head {
    text-align: left;
  }

  .section-head p {
    margin-left: 0;
  }

  .note {
    text-align: left;
    margin-left: 0;
  }
}

/* Articles */
.article-hero {
  padding: 3rem 1.5rem 2rem;
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
}

.article-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.35;
  margin: 0 0 0.75rem;
}

.article-hero .lead {
  max-width: 40rem;
  color: var(--muted);
  margin: 0;
}

.article-hero .lead--narrow {
  max-width: 36rem;
}

.article-hero .lead strong {
  color: var(--text);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.article-tag {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.78rem;
  color: var(--accent-2);
}

.article-list {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: grid;
  gap: 1rem;
}

.article-list--intro {
  margin-bottom: 2.5rem;
}

.section-head--wide {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto 1.5rem;
  padding: 0 1.5rem;
}

.cta--wide {
  margin: 0 auto 3rem;
  max-width: calc(var(--max) + 4rem);
  padding: 0 1.5rem;
}

.article-card {
  display: block;
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
  border-color: rgba(77, 184, 255, 0.35);
  box-shadow: var(--glow);
  color: inherit;
}

.article-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--text);
}

.article-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.article-card__meta {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.article-body {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.article-prose h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

.article-prose h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

.article-prose p,
.article-prose li {
  color: var(--muted);
}

.article-prose ul,
.article-prose ol {
  padding-left: 1.35rem;
}

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

.article-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.article-prose th,
.article-prose td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.article-prose th {
  background: var(--surface-solid);
  color: var(--text);
}

.article-cta {
  margin: 2.5rem 0 0;
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(77, 184, 255, 0.08), rgba(94, 228, 168, 0.06));
}

.article-cta h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.article-cta p {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.article-nav {
  max-width: 42rem;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
  font-size: 0.9rem;
}

.article-nav--bottom {
  padding-bottom: 3rem;
}

@media (prefers-reduced-motion: reduce) {
  .hero-visual,
  .hero-visual-wrap::before,
  .product-status--live::before,
  .reveal {
    animation: none;
    transition: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* メンテナンスページ */
.maintenance-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.maintenance-page .site-header nav {
  display: none;
}

.maintenance-page .logo {
  pointer-events: none;
  cursor: default;
  text-decoration: none;
  color: inherit;
}

.maintenance-page main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 3rem;
  max-width: none;
}

.maintenance-panel {
  width: 100%;
  max-width: 36rem;
}

.maintenance-page .contact-box {
  margin: 0 auto;
  text-align: center;
}

.maintenance-page .contact-box dl {
  margin: 0;
}

.maintenance-page .contact-box dd a {
  color: var(--accent);
}

.maintenance-page .site-footer {
  margin-top: auto;
}

/* 公開統計レポート（articles 配下） */
.stats-kpi-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  margin: 1.25rem 0 1.75rem;
}

.stats-kpi {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.05rem;
  box-shadow: var(--shadow);
}

.stats-kpi__rate {
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--accent-warm);
}

.stats-kpi__title {
  margin-top: 0.35rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

.stats-kpi__sub {
  margin-top: 0.2rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.stats-note {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 0.35rem 0 1rem;
}

.stats-limitations {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.stats-limitations li {
  margin-bottom: 0.55rem;
}