/* Intel Base LP — brand tokens */
:root {
  --navy: #0f1e3a;
  --navy-deep: #0f1e3a;
  --accent: #2563eb;
  --accent-bright: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff6ff;
  --cyan: #06b6d4;
  --success: #22c55e;
  --gray: #f2f4f7;
  --gray-mid: #e5e7eb;
  --text: #0f1e3a;
  --text-muted: #475569;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 18px 50px rgba(15, 30, 58, 0.12);
  --shadow-soft: 0 8px 28px rgba(15, 30, 58, 0.08);
  --font: "Noto Sans JP", "Inter", system-ui, sans-serif;
  --header-h: 80px;
  --container: 1320px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
}

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

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

.narrow {
  width: min(100% - 40px, 760px);
}

.pc-only {
  display: inline;
}

.sp-only {
  display: none;
}

/* 961px 以上でのみ改行（2カラム時の行末はみ出し対策） */
.br-lg {
  display: none;
}

@media (min-width: 961px) {
  .br-lg {
    display: inline;
  }
}

.text-accent {
  color: var(--accent);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.25s,
    box-shadow 0.25s;
  height: var(--header-h);
}

.site-header.is-scrolled {
  border-bottom-color: var(--gray-mid);
  box-shadow: 0 4px 20px rgba(15, 30, 58, 0.04);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img {
  width: auto;
  height: 40px;
  display: block;
}

.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

/* ドロワー専用要素（PCでは非表示） */
.nav-cta,
.nav-drawer-only {
  display: none;
}

body.nav-open {
  overflow: hidden;
}

.header-cta {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  margin-left: auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  transition:
    transform 0.25s,
    opacity 0.25s;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 700;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background 0.2s,
    color 0.2s,
    border-color 0.2s,
    transform 0.2s;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.6rem 1.2rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 0.9375rem;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-outline {
  background: var(--white);
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent-soft);
}

.btn-white {
  background: var(--white);
  color: var(--accent);
  border-color: var(--white);
}

.btn-white:hover {
  background: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.75);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

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

/* Hero */
.hero {
  position: relative;
  height: 100vh;
  min-height: 100vh;
  padding: 0;
  overflow: hidden;
  background: linear-gradient(180deg, var(--gray) 0%, var(--white) 72%);
  display: flex;
  align-items: center;
}

.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.shape {
  position: absolute;
  border-radius: 40% 60% 55% 45%;
  filter: blur(2px);
}

.shape-a {
  width: 56vw;
  height: 70%;
  right: -12%;
  top: -10%;
  background: linear-gradient(
    135deg,
    rgba(37, 99, 235, 0.14),
    rgba(6, 182, 212, 0.1)
  );
  transform: rotate(-18deg);
  border-radius: 48% 52% 40% 60%;
}

.shape-b {
  width: 40vw;
  height: 50%;
  right: 8%;
  bottom: -15%;
  background: linear-gradient(
    160deg,
    rgba(37, 99, 235, 0.1),
    rgba(6, 182, 212, 0.08)
  );
  transform: rotate(12deg);
}

.shape-c {
  width: 28vw;
  height: 40%;
  left: -8%;
  bottom: 0;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1), transparent 70%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  /* width comes from .container on the same element */
  min-width: 0;
  height: 100%;
  text-align: left;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding: 0;
  width: 100%;
  max-width: 520px;
  min-width: 0;
  flex: 0 1 auto;
}

.brand-mark {
  font-family: Inter, var(--font);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  line-height: 1.6;
}

.hero h1 {
  font-size: clamp(1.75rem, 4.2vw + 0.6rem, 3.5rem);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  word-break: normal;
  overflow-wrap: anywhere;
  white-space: normal;
  max-width: 100%;
}

.hero-lead {
  color: var(--text);
  font-size: 1.125rem;
  line-height: 1.9;
  word-break: normal;
  overflow-wrap: break-word;
  max-width: 100%;
}

.hero-lead strong:not(.text-accent) {
  color: var(--navy);
  font-weight: 700;
}

.hero .cta-row {
  justify-content: flex-start;
}

.hero-visual {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  min-width: 0;
  /* Larger mock; bottom clipped within FV */
  height: min(60vh, 560px);
  overflow: hidden;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slack-mock-img {
  width: 100%;
  height: auto;
  display: block;
}

.slack-mock-img--fv {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid rgba(15, 30, 58, 0.08);
  box-shadow:
    0 4px 6px rgba(15, 30, 58, 0.06),
    0 28px 60px rgba(15, 30, 58, 0.2);
}

.slack-mock-img--section {
  animation: none;
  width: min(145%, 860px);
  margin-left: auto;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.4));
}

/* Logo bar — marquee */
.logo-bar {
  padding: 40px 0;
  background: var(--gray);
  overflow: hidden;
}

.logo-marquee {
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(
    90deg,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
}

.logo-marquee-track {
  display: flex;
  width: max-content;
  animation: logo-scroll 32s linear infinite;
}

.logo-bar-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 10px;
  margin: 0;
}

.logo-bar-item {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 220px;
  height: 104px;
  padding: 20px 28px;
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(15, 30, 58, 0.04);
  box-sizing: border-box;
}

.logo-bar-item img {
  width: auto;
  max-width: 160px;
  max-height: 56px;
  height: auto;
  object-fit: contain;
  filter: none;
}

@keyframes logo-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .logo-marquee-track {
    animation: none;
  }
}

/* Sections */
.section {
  padding: 96px 0;
}

.eyebrow {
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.section-lead {
  color: var(--text);
  font-size: 1.125rem;
  margin-bottom: 16px;
}

.section-lead strong,
.emphasis {
  color: var(--navy);
  font-weight: 700;
}

.emphasis {
  font-size: 1.125rem;
  margin: 20px 0 0;
}

/* Problem — reference-style pains */
.problem {
  position: relative;
  background: var(--gray);
  text-align: center;
  overflow: hidden;
  padding: 96px 0 100px;
}

.problem::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -40px;
  height: 120px;
  background: radial-gradient(
    ellipse 70% 80% at 50% 100%,
    rgba(37, 99, 235, 0.12),
    transparent 70%
  );
  pointer-events: none;
}

.problem-inner {
  position: relative;
  z-index: 1;
}

.problem-head {
  max-width: 720px;
  margin: 0 auto 56px;
}

.problem-head .eyebrow {
  text-align: center;
}

.problem-head h2 {
  margin-bottom: 20px;
}

.problem-head .section-lead {
  margin-bottom: 16px;
}

.problem-pains {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
  max-width: 1160px;
  margin: 0 auto;
}

.problem-pain {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  background: var(--white);
  border: 1px solid var(--gray-mid);
  border-radius: var(--radius);
  padding: 28px 20px 26px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.problem-pain-num {
  align-self: flex-start;
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--cyan);
  line-height: 1;
}

.problem-pain-illust {
  position: relative;
  width: 100%;
  height: 156px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border-radius: 10px;
  padding: 12px;
}

.problem-pain-illust img {
  width: 100%;
  height: auto;
  max-height: 132px;
  object-fit: contain;
}

.problem-pain h3 {
  margin: 0;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--navy);
  line-height: 1.4;
}

.problem-pain p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.7;
}

/* What — card + arrow flow */
.what {
  position: relative;
  text-align: center;
  background: var(--white);
  overflow: hidden;
  padding: 110px 0;
}

.what-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 55% 40% at 50% 0%,
    rgba(37, 99, 235, 0.06),
    transparent 65%
  );
}

.what-inner {
  position: relative;
  z-index: 1;
}

.what-head {
  max-width: 760px;
  margin: 0 auto 52px;
}

.what-head .section-lead {
  margin-bottom: 0;
}

/* PC: 左から右へ流れる横フロー */
.what-cards {
  list-style: none;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  max-width: 1040px;
  margin: 0 auto 36px;
  padding: 0;
}

.what-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  flex: 1 1 0;
  min-width: 0;
  background: var(--white);
  border-radius: 16px;
  padding: 24px 14px 22px;
  box-shadow: 0 10px 28px rgba(15, 30, 58, 0.07);
  border: 1px solid rgba(15, 30, 58, 0.04);
  text-align: center;
}

.what-card-illust {
  flex: 0 0 auto;
  width: 76px;
  max-width: 76px;
  margin: 0;
}

.what-card-illust svg {
  width: 100%;
  height: auto;
  display: block;
}

.what-card-body {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 4px;
}

/* 番号はカード上部に置き、下に項目名 */
.what-card-num {
  order: -1;
  flex: 0 0 auto;
  font-family: Inter, var(--font);
  font-size: 0.9375rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--cyan);
  line-height: 1.4;
}

.what-card strong {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.4;
}

/* PC: 右向き矢印 */
.what-arrow {
  flex: 0 0 auto;
  align-self: center;
  width: 22px;
  height: 14px;
  background: var(--cyan);
  border-radius: 2px;
  clip-path: polygon(0 25%, 65% 25%, 65% 0, 100% 50%, 65% 100%, 65% 75%, 0 75%);
}

.what-caption {
  display: inline-block;
  margin: 0 auto;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9375rem;
  max-width: 36em;
  line-height: 1.6;
}

/* Mechanism — HOW IT WORKS */
.mechanism {
  padding: 0 0 110px;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray) 100%);
}

.mech-banner {
  position: relative;
  background:
    radial-gradient(
      ellipse 50% 80% at 10% 20%,
      rgba(6, 182, 212, 0.18),
      transparent 55%
    ),
    radial-gradient(
      ellipse 45% 70% at 90% 30%,
      rgba(37, 99, 235, 0.35),
      transparent 50%
    ),
    linear-gradient(125deg, #0f1e3a 0%, #1d4ed8 48%, #2563eb 100%);
  color: var(--white);
  text-align: center;
  padding: 88px 0 140px;
  clip-path: polygon(0 0, 100% 0, 100% 82%, 0 100%);
  overflow: hidden;
}

.mech-banner-en {
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  font-weight: 800;
  color: var(--cyan);
  margin-bottom: 14px;
}

.mech-banner h2 {
  margin: 0 0 16px;
  color: #fff;
  font-size: clamp(1.875rem, 3.6vw, 2.75rem);
  letter-spacing: 0.04em;
}

.mech-banner-lead {
  margin: 0 auto;
  max-width: 28em;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.mech-overlap {
  margin-top: -96px;
  position: relative;
  z-index: 2;
}

.mech-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: stretch;
}

.mech-card {
  position: relative;
  background: var(--white);
  border: 1px solid rgba(37, 99, 235, 0.08);
  border-radius: 20px;
  padding: 40px 28px 36px;
  box-shadow: 0 20px 48px rgba(15, 30, 58, 0.1);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mech-step {
  position: absolute;
  top: 18px;
  left: 20px;
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.mech-icon {
  width: 88px;
  height: 88px;
  margin: 4px auto 16px;
  border-radius: 22px;
  background: transparent;
  color: var(--accent);
  display: grid;
  place-items: center;
  box-shadow: none;
  overflow: hidden;
}

.mech-icon svg {
  width: 88px;
  height: 88px;
  display: block;
}

.mech-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--navy);
  letter-spacing: 0.02em;
}

.mech-card p {
  margin: 0;
  color: var(--text);
  font-size: 0.975rem;
  line-height: 1.75;
  max-width: 14em;
}

.mech-connector {
  width: 36px;
  height: 14px;
  align-self: center;
  background: var(--cyan);
  border-radius: 2px;
  clip-path: polygon(0 25%, 65% 25%, 65% 0, 100% 50%, 65% 100%, 65% 75%, 0 75%);
  opacity: 0.9;
}

/* Slack */
.slack-section {
  background: var(--gray);
  color: var(--text);
  overflow: hidden;
}

.slack-section .eyebrow {
  color: var(--cyan);
}

.slack-section .section-lead {
  color: var(--text);
  margin: 0;
}

.slack-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.slack-copy h2 {
  margin-bottom: 16px;
}

.slack-proof {
  justify-self: end;
  max-width: 100%;
  overflow: hidden;
  border-radius: 16px;
  box-shadow: var(--shadow);
  background: var(--white);
}

.slack-proof .slack-mock-img {
  width: 100%;
  height: auto;
  display: block;
}

/* AI — analysis flow */
.ai-section {
  position: relative;
  text-align: center;
  background: var(--white);
  overflow: hidden;
}

.ai-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 60% 45% at 50% 0%,
    rgba(37, 99, 235, 0.07),
    transparent 60%
  );
}

.ai-inner {
  position: relative;
  z-index: 1;
}

.ai-head {
  max-width: 720px;
  margin: 0 auto 52px;
}

.ai-head .section-lead {
  margin: 0 auto;
}

.ai-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  margin: 0 auto 40px;
  max-width: 980px;
}

.ai-dim {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 24px;
  aspect-ratio: 1;
  max-width: 260px;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: 50%;
  box-shadow: none;
  text-align: center;
}

.ai-dim-num {
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--cyan);
  line-height: 1;
}

.ai-dim-icon {
  width: 56px;
  height: 56px;
  margin: 2px 0;
  border-radius: 16px;
  overflow: hidden;
}

.ai-dim-icon svg {
  width: 56px;
  height: 56px;
  display: block;
}

.ai-dim-label {
  display: block;
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.ai-dim strong {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.4;
}

.ai-flow-arrow {
  flex: 0 0 28px;
  align-self: center;
  height: 14px;
  background: var(--cyan);
  border-radius: 2px;
  clip-path: polygon(0 25%, 65% 25%, 65% 0, 100% 50%, 65% 100%, 65% 75%, 0 75%);
}

.ai-punch {
  display: inline-block;
  margin: 0 auto;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--navy);
  font-size: 1.125rem;
  font-weight: 800;
}

.ai-punch em {
  font-style: normal;
  color: var(--accent);
}

/* Effect — impact matrix board */
.effect {
  position: relative;
  background: var(--gray);
  text-align: center;
  overflow: hidden;
}

.effect-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 55% 40% at 50% 0%,
    rgba(37, 99, 235, 0.06),
    transparent 65%
  );
}

.effect-inner {
  position: relative;
  z-index: 1;
}

.effect-head {
  max-width: 720px;
  margin: 0 auto 48px;
}

.effect-head .section-lead {
  margin: 0 auto;
}

.effect-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0 auto;
  max-width: 1040px;
  background: var(--white);
  border: 1px solid var(--gray-mid);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.effect-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 40px 28px 36px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--gray-mid);
  box-shadow: none;
}

.effect-item:last-child {
  border-right: 0;
}

.effect-num {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: Inter, var(--font);
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--cyan);
  line-height: 1;
}

.effect-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: transparent;
  color: var(--accent);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.effect-icon svg {
  width: 72px;
  height: 72px;
  display: block;
}

.effect-item h3 {
  margin: 0;
  font-weight: 800;
  font-size: 1.125rem;
  line-height: 1.45;
  color: var(--navy);
  letter-spacing: 0.01em;
}

.effect-item p {
  margin: 0;
  max-width: 18em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text);
}

/* Audience — horizontal editorial list */
.audience {
  position: relative;
  text-align: center;
  background: var(--white);
  overflow: hidden;
}

.audience-bg {
  display: none;
}

.audience-inner {
  position: relative;
  z-index: 1;
}

.audience-head {
  max-width: 640px;
  margin: 0 auto 48px;
}

.audience-head .section-lead {
  margin: 0 auto;
}

.reason-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0 auto;
  max-width: 880px;
  text-align: left;
  border-top: 1px solid var(--gray-mid);
}

.reason-card {
  position: relative;
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  align-items: center;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--gray-mid);
  border-radius: 0;
  padding: 32px 8px;
  box-shadow: none;
}

.reason-card::before {
  display: none;
}

.reason-num {
  font-family: Inter, var(--font);
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--cyan);
  line-height: 1;
}

.reason-body {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  min-width: 0;
}

.reason-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: transparent;
  flex-shrink: 0;
  overflow: hidden;
}

.reason-icon svg {
  width: 72px;
  height: 72px;
  display: block;
}

.reason-copy {
  min-width: 0;
}

.reason-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 8px;
  line-height: 1.45;
  color: var(--navy);
}

.reason-card p {
  color: var(--text);
  font-size: 0.975rem;
  line-height: 1.75;
  margin: 0;
}

/* Pricing */
.pricing {
  background: var(--gray);
  text-align: center;
}

.pricing-lead {
  margin: -4px auto 0;
  max-width: 28em;
}

.pricing-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin: 48px auto 0;
  width: 100%;
  max-width: 880px;
  text-align: left;
  align-items: stretch;
}

.plan-card {
  background: var(--white);
  border-radius: 20px;
  border: 1px solid rgba(15, 30, 58, 0.06);
  box-shadow: 0 14px 36px rgba(15, 30, 58, 0.07);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

.plan-card--featured {
  background: var(--accent-soft);
  border: 2px solid var(--accent);
  box-shadow: 0 18px 44px rgba(37, 99, 235, 0.12);
}

.plan-card-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  padding: 36px 32px 28px;
  background: transparent;
  border-right: none;
  border-bottom: 1px solid rgba(15, 30, 58, 0.06);
}

.plan-card--featured .plan-card-head {
  background: transparent;
  border-right: none;
  border-bottom-color: rgba(37, 99, 235, 0.14);
}

.plan-card-body {
  padding: 28px 32px 36px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex: 1;
}

.plan-name {
  margin: 0 0 16px;
  font-family: Inter, var(--font);
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.plan-price {
  margin: 0;
  color: var(--navy);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-height: 5.5rem;
}

.plan-price-main {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px 4px;
  line-height: 1;
}

.plan-price strong {
  font-family: Inter, var(--font);
  font-size: clamp(2.75rem, 4.5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--navy);
  line-height: 1;
}

.plan-card--featured .plan-price strong {
  color: var(--accent);
}

.plan-price-unit {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy);
  margin-left: 2px;
}

.plan-price-tax {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
  margin-left: 2px;
}

.price-was,
.price-period {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  min-height: 1.2em;
}

.price-was {
  text-decoration: line-through;
}

.plan-price-note {
  margin: 16px 0 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--white);
  background: var(--accent);
}

.plan-card--featured .plan-price-note {
  background: var(--navy);
}

.plan-features-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 0.8125rem;
  font-weight: 800;
  color: var(--text);
}

.plan-features-label::before {
  content: "";
  width: 3px;
  height: 1.1em;
  border-radius: 2px;
  background: var(--cyan);
  flex-shrink: 0;
}

.plan-card--featured .plan-features-label::before {
  background: var(--accent);
}

.plan-features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features li {
  position: relative;
  padding-left: 28px;
  font-size: 0.975rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--navy);
}

.plan-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: inset 0 0 0 3px var(--accent-soft);
}

.pricing-option {
  margin: 28px auto 0;
  font-size: 0.875rem;
  color: var(--text);
  text-align: center;
}

.pricing-option span {
  font-weight: 700;
  color: var(--navy);
}

/* Final CTA + Contact form */
.final-cta {
  background: var(--accent);
  color: var(--white);
  text-align: center;
  padding: 96px 0;
}

.container.final-cta-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
  gap: 40px;
  width: min(100% - 40px, 1040px);
  margin-inline: auto;
  min-width: 0;
}

.final-cta-copy {
  width: 100%;
  max-width: 36em;
  text-align: left;
  color: var(--white);
}

.final-cta-eyebrow {
  margin: 0 0 14px;
  font-family: Inter, var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.final-cta h2 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: 0.02em;
}

.final-cta-lead {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.92);
}

.final-cta-points {
  margin: 22px 0 0;
  padding-left: 1.1rem;
  list-style: disc;
  color: rgba(255, 255, 255, 0.9);
  line-height: 2;
}

.contact-card {
  width: 100%;
  background: var(--white);
  color: var(--text);
  border-radius: 20px;
  padding: 28px 28px 32px;
  box-shadow: var(--shadow);
  text-align: left;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--navy);
}

.form-label span {
  color: var(--accent);
}

.form-control {
  width: 100%;
  border: 1px solid var(--gray-mid);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  font-size: 0.95rem;
  color: var(--navy);
  background: var(--gray);
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control::placeholder {
  color: var(--text);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.form-note {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text);
}

.form-note a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.form-note a:hover {
  text-decoration: underline;
}

.form-submit {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}

/* ボット誘引用の隠しフィールド（display:none だと素通りするため画面外へ） */
.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-feedback {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--accent);
  font-weight: 700;
}

.form-feedback.is-error {
  color: #dc2626;
}

.contact-form.is-success .form-feedback {
  color: var(--success);
}

/* Footer */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.72);
  padding: 56px 0 36px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(200px, 1.1fr) 2fr;
  gap: 40px 48px;
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.logo--footer img {
  height: 48px;
  width: 48px;
  object-fit: contain;
}

.footer-tagline {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 16em;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

.footer-nav-label {
  margin: 0 0 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45);
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: color 0.15s ease;
}

.footer-nav a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 12px 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
  margin: 0;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

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

.copyright a:hover {
  color: rgba(255, 255, 255, 0.85);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

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

.reveal-delay {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

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

  .reveal,
  .slack-mock-img {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
}

/* ===== USE CASES ===== */
.usecases-head {
  text-align: center;
  margin-bottom: 64px;
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  list-style: none;
  align-items: stretch;
}

.usecase-card {
  display: flex;
  flex-direction: column;
  text-align: center;
  min-width: 0;
  padding: 32px 24px;
  border-radius: 16px;
  background: #f8fafc;
  transition: all 0.3s ease;
  border: 1px solid #e5e7eb;
}

.usecase-card:hover {
  background: #f0f7ff;
  border-color: #2563eb;
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.1);
}

.usecase-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.usecase-icon svg {
  width: 80px;
  height: 80px;
}

.usecase-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--navy);
}

.usecase-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
}

/* ===== CLIENTS ===== */
.clients {
  background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
  position: relative;
  overflow: hidden;
}

.clients-head {
  text-align: center;
  margin-bottom: 56px;
}

.clients-logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
  list-style: none;
}

.client-logo-placeholder {
  height: 80px;
  border: 2px dashed #d1d5db;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #9ca3af;
  font-size: 0.875rem;
  background: var(--white);
}

.clients-stats {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--white);
  border-radius: 16px;
  padding: 48px 32px;
  box-shadow: 0 4px 16px rgba(15, 30, 58, 0.08);
  max-width: 600px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: #e5e7eb;
  list-style: none;
}

/* ===== FAQ ===== */
.faq-head {
  text-align: center;
  margin-bottom: 56px;
}

.faq-items {
  max-width: 760px;
  margin: 0 auto;
  list-style: none;
}

.faq-item {
  margin-bottom: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: var(--white);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  text-align: left;
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: #f8fafc;
}

.faq-question svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--accent);
  transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 24px;
  color: var(--text);
  line-height: 1.8;
  font-size: 0.9375rem;
  background: #fafbfc;
}

.faq-answer p {
  margin: 0;
}

/* ===== SUPPORT ===== */
.support-head {
  text-align: center;
  margin-bottom: 64px;
}

.support-features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  list-style: none;
  align-items: stretch;
}

.support-feature {
  display: flex;
  flex-direction: column;
  text-align: center;
  min-width: 0;
  padding: 32px 24px;
  border-radius: 16px;
  background: var(--white);
  border: 1px solid #e5e7eb;
  transition: all 0.3s ease;
}

.support-feature:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.1);
}

.support-feature-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.support-feature-icon svg {
  width: 64px;
  height: 64px;
}

.support-feature h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--navy);
}

.support-feature p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
}

/* ===== INTEGRATIONS ===== */
.integrations {
  background: linear-gradient(135deg, #f0f7ff 0%, #ecfeff 100%);
  position: relative;
  overflow: hidden;
}

.integrations-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: center;
}

.integrations-head {
  text-align: left;
  margin-bottom: 0;
}

.integrations-head h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.3;
}

.integrations-head .section-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
}

.integrations-showcase {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
}

.integrations-note {
  grid-column: 1 / -1;
  text-align: center;
  margin-top: 24px;
}

.integration-ring {
  position: relative;
  width: min(72vw, 520px);
  aspect-ratio: 1;
  max-width: 520px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.7) 0%,
    rgba(239, 246, 255, 0.9) 50%,
    rgba(191, 219, 254, 0.4) 100%
  );
  border: 1px solid rgba(37, 99, 235, 0.18);
  box-shadow:
    inset 0 0 0 18px rgba(255, 255, 255, 0.35),
    0 18px 40px rgba(37, 99, 235, 0.08);
}

.integration-ring::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1px dashed rgba(37, 99, 235, 0.4);
}

.integration-node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 18px 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #dbeafe;
  border-radius: 18px;
  box-shadow: 0 8px 20px rgba(15, 30, 58, 0.06);
  backdrop-filter: blur(2px);
}

.integration-node p {
  font-size: 0.75rem;
  color: var(--navy);
  font-weight: 600;
  line-height: 1.3;
}

.integration-node--slack {
  width: 240px;
  height: 240px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(
    180deg,
    rgba(37, 99, 235, 0.1),
    rgba(255, 255, 255, 1)
  );
  border-color: rgba(37, 99, 235, 0.18);
  box-shadow: 0 20px 38px rgba(37, 99, 235, 0.12);
}

.integration-node--slack p {
  font-size: 1rem;
}

.integration-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.integration-logo img {
  width: 60px;
  height: 60px;
  display: block;
}

.integration-logo--slack img {
  width: 80px;
  height: 80px;
}

.integration-node--google {
  width: 180px;
  height: 140px;
  left: -2%;
  top: 12%;
}

.integration-node--microsoft {
  width: 180px;
  height: 140px;
  right: -2%;
  top: 12%;
}

.integration-node--notion {
  width: 180px;
  height: 140px;
  left: 0%;
  bottom: 10%;
}

.integration-node--zapier {
  width: 180px;
  height: 140px;
  right: 0%;
  bottom: 10%;
}

.integrations-note {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text);
  margin-top: 32px;
}

/* =========================================
   RESPONSIVE  （最後にまとめて定義：上書き順を保証）
   ========================================= */

@media (max-width: 1024px) {
  .integrations-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .integrations-head {
    text-align: center;
  }

  .integrations-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  .usecases-grid,
  .support-features {
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: 560px;
    margin: 0 auto;
  }

  .usecases-head,
  .support-head {
    margin-bottom: 40px;
  }

  .slack-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .pricing-board {
    gap: 20px;
    max-width: 760px;
  }

  .plan-card-head {
    padding: 32px 24px 24px;
  }

  .plan-card-body {
    padding: 24px 24px 32px;
  }

  .reason-list {
    max-width: 100%;
  }

  .reason-card {
    grid-template-columns: 64px 1fr;
    gap: 16px;
    padding: 28px 4px;
  }

  .reason-num {
    font-size: 2.25rem;
  }

  .effect-grid {
    grid-template-columns: 1fr;
  }

  .effect-item {
    border-right: 0;
    border-bottom: 1px solid var(--gray-mid);
    padding: 32px 24px;
  }

  .effect-item:last-child {
    border-bottom: 0;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .container.final-cta-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    width: min(100% - 32px, 560px);
  }

  /* 縦積み時は 見出し → フォーム の順で読ませる */
  .final-cta-copy {
    order: -1;
    max-width: none;
  }

  .contact-card {
    padding: 24px;
    min-width: 0;
  }

  .problem-pains {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  /* タブレット以下は従来どおり縦積み */
  .what-cards {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    max-width: 520px;
  }

  .what-card {
    flex: 0 0 auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 22px;
    width: 100%;
    padding: 16px 26px;
    text-align: left;
  }

  .what-card-illust {
    flex: 0 0 84px;
    width: 84px;
    max-width: 84px;
  }

  .what-card-body {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
  }

  .what-card-num {
    order: 2;
    font-size: 0.8125rem;
  }

  /* 縦積み時は下向き矢印に戻す */
  .what-arrow {
    width: 14px;
    height: 22px;
    clip-path: polygon(
      25% 0,
      75% 0,
      75% 65%,
      100% 65%,
      50% 100%,
      0 65%,
      25% 65%
    );
  }

  .what {
    padding: 88px 0;
  }

  .ai-flow {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    max-width: 360px;
  }

  .ai-dim {
    width: min(100%, 280px);
    max-width: 280px;
    aspect-ratio: auto;
    border-radius: 20px;
    padding: 32px 24px;
  }

  .ai-flow-arrow {
    flex: 0 0 24px;
    width: 14px;
    height: 24px;
    clip-path: polygon(
      25% 0,
      75% 0,
      75% 65%,
      100% 65%,
      50% 100%,
      0 65%,
      25% 65%
    );
  }

  .nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  /* fixed の基準をビューポートにするため、モバイルでは backdrop-filter を外す */
  .site-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: none;
  }

  .header-inner {
    position: relative;
  }

  /* ロゴとハンバーガーはオーバーレイより前面に */
  .logo,
  .menu-toggle {
    position: relative;
    z-index: 95;
  }

  /* 全画面メニュー */
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    z-index: 90;
    margin: 0;
    background: var(--white);
    padding: calc(var(--header-h) + 20px) 24px
      calc(28px + env(safe-area-inset-bottom));
    gap: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-bottom: 0;
    box-shadow: none;
  }

  .nav.is-open > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 2px;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--navy);
    border-bottom: 1px solid var(--gray-mid);
  }

  .nav.is-open > a::after {
    content: "";
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--accent);
    border-right: 2px solid var(--accent);
    transform: rotate(45deg);
  }

  .nav.is-open > .nav-drawer-only {
    display: flex;
  }

  .nav.is-open .nav-cta {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
    padding-top: 32px;
  }

  .nav.is-open .nav-cta .btn {
    width: 100%;
  }

  .hero-visual,
  .slack-proof {
    margin-right: 0;
    width: 100%;
    align-self: center;
  }

  .hero-visual {
    flex: 0 0 auto;
    min-height: 0;
    width: min(100%, 640px);
    max-width: 100%;
    height: auto;
    overflow: visible;
    margin-top: 0;
  }

  .slack-mock-img--fv {
    width: 100%;
  }

  .slack-mock-img--section {
    width: 100%;
  }

  .logo img {
    height: 40px;
  }

  .hero {
    height: auto;
    min-height: 100vh;
    padding: 48px 0 0;
    align-items: center;
  }

  .hero-copy {
    max-width: none;
    width: 100%;
    padding: 0;
    align-self: stretch;
    flex: 0 0 auto;
  }

  .hero-grid {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 28px;
    height: auto;
    padding-top: 24px;
    text-align: left;
  }

  .mech-banner {
    clip-path: none;
    padding: 64px 0 120px;
  }

  .mech-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 420px;
    margin: 0 auto;
  }

  .mech-connector {
    width: 14px;
    height: 28px;
    clip-path: polygon(
      25% 0,
      75% 0,
      75% 65%,
      100% 65%,
      50% 100%,
      0 65%,
      25% 65%
    );
  }

  .section {
    padding: 72px 0;
  }

  .pricing-board {
    gap: 20px;
  }

  .hero .cta-row {
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
  }

  .hero .cta-row .btn {
    flex: 1 1 auto;
    min-width: min(100%, 200px);
    max-width: 100%;
    justify-content: center;
  }

  .plan-price strong {
    font-size: clamp(2.25rem, 10vw, 3.25rem);
  }

  .footer-nav {
    grid-template-columns: 1fr 1fr;
    gap: 28px 24px;
  }
}

@media (max-width: 760px) {
  .integration-ring {
    width: min(85vw, 420px);
  }

  .integration-node--slack {
    width: 140px;
    height: 140px;
  }

  .integration-node--google,
  .integration-node--microsoft,
  .integration-node--notion,
  .integration-node--zapier {
    width: 130px;
    height: 105px;
  }

  .integration-node p {
    font-size: 0.65rem;
  }

  .integration-logo img {
    width: 48px;
    height: 48px;
  }

  .integration-logo--slack img {
    width: 60px;
    height: 60px;
  }

  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }
}

@media (max-width: 640px) {
  .pc-only {
    display: none;
  }

  .sp-only {
    display: inline;
  }

  .container {
    width: min(100% - 32px, var(--container));
  }

  .container.final-cta-grid {
    width: min(100% - 32px, 100%);
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: 0;
    padding: 32px 0 48px;
  }

  .hero-visual {
    height: auto;
  }

  .hero-catch {
    white-space: normal;
  }

  /* モバイルは FV / ON SLACK / CTA を中央揃え */
  .hero-grid,
  .slack-copy,
  .final-cta-copy {
    text-align: center;
  }

  .hero .cta-row {
    justify-content: center;
  }

  .final-cta-points {
    margin-inline: auto;
    padding-left: 0;
    list-style: none;
  }

  .hero h1 {
    white-space: normal;
    font-size: clamp(1.625rem, 8vw, 2rem);
  }

  .hero-lead {
    font-size: 0.975rem;
  }

  .logo img {
    height: 34px;
  }

  .effect-grid {
    grid-template-columns: 1fr;
  }

  .effect-item {
    border-right: 0 !important;
    border-bottom: 1px solid var(--gray-mid);
  }

  .effect-item:last-child {
    border-bottom: 0;
  }

  .cta-row {
    width: 100%;
  }

  .cta-row .btn {
    width: 100%;
    max-width: 100%;
  }

  .btn {
    white-space: normal;
    text-align: center;
  }

  .what {
    padding: 72px 0;
  }

  .what-cards {
    max-width: 100%;
    gap: 8px;
  }

  .what-card {
    gap: 16px;
    padding: 12px 18px;
    border-radius: 14px;
  }

  .what-card-illust {
    flex-basis: 64px;
    width: 64px;
    max-width: 64px;
  }

  .what-card strong {
    font-size: 1.125rem;
  }

  .problem-pains {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .problem-head {
    margin-bottom: 40px;
  }

  .problem-pain {
    padding: 24px 18px 22px;
  }

  .reason-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .reason-body {
    gap: 14px;
  }

  .reason-num {
    font-size: 2rem;
  }

  .final-cta {
    padding: 72px 0 64px;
  }

  .footer-nav {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .contact-card {
    padding: 20px 18px 24px;
    border-radius: 16px;
  }

  /* 16px 未満だと iOS Safari がフォーカス時に拡大するため */
  .form-control {
    font-size: 1rem;
  }

  .plan-card-head,
  .plan-card-body {
    padding: 28px 22px;
  }

  .pricing-board {
    grid-template-columns: 1fr;
    max-width: 420px;
    gap: 16px;
  }

  .section-lead,
  .emphasis,
  .final-cta-lead,
  .effect-item h3,
  .effect-item p,
  h2 {
    overflow-wrap: break-word;
    word-break: normal;
  }

  .eyebrow {
    font-size: 0.65rem;
    margin-bottom: 10px;
  }

  h2 {
    font-size: clamp(1.5rem, 6vw, 1.875rem);
  }

  .section-lead {
    font-size: 0.9375rem;
  }

  .problem-pain h3 {
    font-size: 1rem;
  }

  .problem-pain p {
    font-size: 0.875rem;
  }

  .integrations-head h2 {
    font-size: clamp(1.5rem, 6vw, 1.875rem);
    text-align: center;
  }

  .integrations-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .faq-question {
    font-size: 0.9375rem;
    padding: 14px 16px;
  }

  .faq-answer {
    padding: 14px 16px;
    font-size: 0.875rem;
  }

  .usecases-grid,
  .support-features {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 100%;
  }

  .usecase-card,
  .support-feature {
    padding: 24px 20px;
    border-radius: 14px;
  }

  .usecase-icon,
  .support-feature-icon {
    margin-bottom: 14px;
  }

  .usecase-icon svg {
    width: 64px;
    height: 64px;
  }

  .support-feature-icon svg {
    width: 56px;
    height: 56px;
  }

  .usecase-card h3,
  .support-feature h3 {
    font-size: 1.0625rem;
    margin-bottom: 8px;
  }

  .usecase-card p,
  .support-feature p {
    font-size: 0.875rem;
  }

  .usecases-head,
  .support-head,
  .faq-head {
    margin-bottom: 32px;
  }

  /* 連携図：円形の絶対配置だとノードが重なるためカード並びに切り替え */
  .integrations-showcase {
    width: 100%;
  }

  .integration-ring {
    width: 100%;
    max-width: 100%;
    aspect-ratio: auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    padding: 18px 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.6);
    box-shadow: none;
  }

  .integration-ring::before {
    display: none;
  }

  .integration-node--slack,
  .integration-node--google,
  .integration-node--microsoft,
  .integration-node--notion,
  .integration-node--zapier {
    position: static;
    inset: auto;
    transform: none;
    width: auto;
    height: auto;
    padding: 16px 10px;
  }

  .integration-node--slack {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: center;
    gap: 12px;
    padding: 16px 12px;
  }

  .integration-node p {
    font-size: 0.75rem;
  }

  .integration-node--slack p {
    font-size: 1rem;
  }

  .integration-logo img {
    width: 40px;
    height: 40px;
  }

  .integration-logo--slack img {
    width: 48px;
    height: 48px;
  }

  .integrations-note {
    margin-top: 20px;
    font-size: 0.8125rem;
  }
}