/* ===================================================
   言葉屋 公式サイト スタイルシート (Ver.1)
   Design: C案ベース「和モダン × AI × ミニマル」
   =================================================== */

:root {
  /* 和モダン × AI カラーパレット */
  --color-paper: #fbfbfa;       /* 生成り・白ベース背景 */
  --color-paper-alt: #f3f3f0;   /* セクション用オフホワイト */
  --color-paper-card: #ffffff;  /* カード背景 */
  --color-ink: #122238;         /* 墨色（メイン文字色） */
  --color-ink-soft: #2a3b4c;    /* やわらかな墨色 */
  --color-muted: #5c6b78;       /* 補足・説明テキスト */
  --color-line: #e2e6e8;        /* 繊細な境界線 */
  --color-line-dark: #cad2d6;   /* 強調境界線 */
  
  /* アクセント（澄んだブルー × 和の藍） */
  --color-blue-accent: #3a7594; /* 和の藍色アクセント */
  --color-blue-light: #e8f1f5;  /* 淡いブルー背景 */
  --color-blue-glow: rgba(58, 117, 148, 0.15);
  
  --color-line-green: #06c755;  /* LINEブランドカラー */
  --color-line-green-hover: #05b34c;

  /* タイポグラフィ */
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "DM Mono", "SF Mono", Consolas, monospace;

  /* アニメーション & イージング */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-normal: 0.35s var(--ease-out);

  /* レイアウト */
  --shell-max: 1200px;
  --header-height: 80px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

/* ================= Base & Reset ================= */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
  letter-spacing: 0.03em;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

ul, ol {
  padding-left: 0;
  list-style: none;
}

/* ================= Layout Utilities ================= */
.section-shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.pc-only {
  display: inline;
}

@media (max-width: 768px) {
  .pc-only {
    display: none;
  }
}

/* 共通アイブロウ (ラベル) */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-blue-accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.line-dot {
  display: inline-block;
  width: 20px;
  height: 1.5px;
  background-color: var(--color-blue-accent);
}

.section-intro {
  margin-bottom: 56px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 640px;
  line-height: 1.9;
}

/* ================= Buttons ================= */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.button-primary {
  background-color: var(--color-ink);
  color: #ffffff;
  border-color: var(--color-ink);
  box-shadow: 0 4px 14px rgba(18, 34, 56, 0.12);
}

.button-primary:hover {
  background-color: var(--color-blue-accent);
  border-color: var(--color-blue-accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--color-blue-glow);
}

.button-outline {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}

.button-outline:hover {
  background-color: var(--color-ink);
  color: #ffffff;
}

.button-text {
  background-color: transparent;
  color: var(--color-ink);
  padding: 14px 12px;
  border-bottom: 1px solid var(--color-ink);
  border-radius: 0;
}

.button-text:hover {
  color: var(--color-blue-accent);
  border-bottom-color: var(--color-blue-accent);
}

.button-large {
  padding: 16px 36px;
  font-size: 1rem;
}

.button-line {
  background-color: var(--color-line-green);
  color: #ffffff;
  border-color: var(--color-line-green);
}

.button-line:hover {
  background-color: var(--color-line-green-hover);
  border-color: var(--color-line-green-hover);
  transform: translateY(-1px);
}

/* ================= Header ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(251, 251, 250, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--shell-max);
  height: var(--header-height);
  margin: 0 auto;
  padding: 0 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--color-ink);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-ink);
  background: #ffffff;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-ink);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  margin-left: 4px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  position: relative;
  padding: 6px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-blue-accent);
  transition: width var(--transition-fast);
}

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

.site-nav a:hover::after {
  width: 100%;
}

.site-nav .nav-sub-link {
  color: var(--color-muted);
  font-size: 0.8125rem;
  border-left: 1px solid var(--color-line-dark);
  padding-left: 16px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-cta {
  padding: 10px 18px;
  font-size: 0.8125rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 6px;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  transition: all var(--transition-fast);
}

/* ================= Hero Section ================= */
.hero {
  position: relative;
  padding-top: 60px;
  padding-bottom: 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background-image: linear-gradient(var(--color-line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.45;
  mask-image: radial-gradient(circle at 80% 30%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 80% 30%, black 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 1.25;
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}

.hero-title em {
  font-style: normal;
  color: var(--color-blue-accent);
  position: relative;
}

.hero-description {
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--color-ink-soft);
  margin-bottom: 40px;
}

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

/* Hero Process Architecture Card */
.hero-diagram-card {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: 0 12px 36px rgba(18, 34, 56, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
}

.card-glass-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.diagram-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.diagram-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-blue-accent);
}

.status-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-blue-accent);
  animation: pulse-anim 2s infinite ease-in-out;
}

@keyframes pulse-anim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.diagram-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.diagram-step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.diagram-step:hover {
  background: #ffffff;
  border-color: var(--color-blue-accent);
  transform: translateX(4px);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-blue-accent);
}

.step-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 2px;
}

.step-body h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.step-body p {
  font-size: 0.75rem;
  color: var(--color-muted);
  line-height: 1.4;
  margin: 0;
}

.diagram-connector {
  text-align: center;
  color: var(--color-line-dark);
  font-size: 0.75rem;
  line-height: 1;
}

.diagram-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-line);
  padding-top: 14px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-muted);
}

.hero-bottom-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

.hero-scroll-indicator {
  height: 1px;
  flex: 1;
  background: var(--color-line);
  position: relative;
  overflow: hidden;
}

.hero-scroll-indicator::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30%;
  height: 100%;
  background: var(--color-blue-accent);
  animation: scroll-line 3s infinite ease-in-out;
}

@keyframes scroll-line {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* ================= Problems Section ================= */
.problems {
  padding-top: 96px;
  padding-bottom: 96px;
  border-top: 1px solid var(--color-line);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.problem-card {
  background-color: var(--color-paper);
  padding: 32px 28px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.problem-card:hover {
  background-color: #ffffff;
  transform: translateY(-2px);
  z-index: 1;
  box-shadow: 0 8px 24px rgba(18, 34, 56, 0.05);
}

.problem-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

.problem-index {
  color: var(--color-blue-accent);
  font-weight: 500;
}

.problem-heading {
  font-size: 1.125rem;
  line-height: 1.6;
  margin: 16px 0;
}

.problem-arrow {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-blue-accent);
  text-align: right;
  display: block;
}

.problem-card-featured {
  background-color: var(--color-ink);
  color: #ffffff;
}

.problem-card-featured h3,
.problem-card-featured .problem-top {
  color: #ffffff;
}

.problem-card-featured .problem-arrow {
  color: #e8f1f5;
}

.problem-card-featured:hover {
  background-color: var(--color-blue-accent);
}

/* ================= About Section ================= */
.about {
  background-color: var(--color-ink);
  color: #ffffff;
  padding-top: 112px;
  padding-bottom: 112px;
  position: relative;
}

.about .eyebrow {
  color: #9eb8c7;
}

.about .line-dot {
  background-color: #9eb8c7;
}

.about h2 {
  color: #ffffff;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
}

.about-title {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  line-height: 1.3;
  margin-bottom: 32px;
}

.about-stamp {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-family: var(--font-serif);
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  color: #c1d2dc;
}

.about-text-block {
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 40px;
  margin-bottom: 40px;
}

.about-highlight {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  line-height: 1.6;
  color: #ffffff;
  margin-bottom: 20px;
}

.about-text-block p {
  color: #c7d2d9;
  font-size: 0.9375rem;
  line-height: 2;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-item {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 16px;
}

.value-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #9eb8c7;
  display: block;
  margin-bottom: 8px;
}

.value-item h4 {
  font-size: 0.9375rem;
  color: #ffffff;
  margin-bottom: 8px;
}

.value-item p {
  font-size: 0.8125rem;
  color: #a4b3be;
  line-height: 1.7;
  margin: 0;
}

/* ================= Services Section (3本柱) ================= */
.services {
  padding-top: 112px;
  padding-bottom: 112px;
}

.services-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.service-block {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  padding: 44px;
  background-color: var(--color-paper-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 18px rgba(18, 34, 56, 0.03);
  transition: all var(--transition-normal);
}

.service-block:hover {
  border-color: var(--color-blue-accent);
  box-shadow: 0 10px 30px rgba(18, 34, 56, 0.06);
  transform: translateY(-2px);
}

.service-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-blue-accent);
  display: block;
  margin-bottom: 12px;
}

.service-name {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.service-catch {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

.service-desc {
  font-size: 0.9375rem;
  color: var(--color-ink-soft);
  line-height: 1.9;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

.service-tags li {
  font-size: 0.75rem;
  color: var(--color-muted);
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  padding: 4px 12px;
  border-radius: 20px;
}

/* 補助バナー: ITサポート */
.sub-service-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  background-color: var(--color-blue-light);
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-md);
  padding: 32px 36px;
  margin-top: 48px;
}

.sub-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--color-blue-accent);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.sub-service-text h4 {
  font-size: 1.125rem;
  margin-bottom: 6px;
}

.sub-service-text p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 0;
}

/* ================= Flow Section ================= */
.flow {
  padding-top: 112px;
  padding-bottom: 112px;
  border-top: 1px solid var(--color-line);
}

.flow-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.flow-card {
  background-color: var(--color-paper-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 24px 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.flow-card:hover {
  border-color: var(--color-blue-accent);
  box-shadow: 0 6px 20px rgba(18, 34, 56, 0.05);
}

.flow-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-blue-accent);
  margin-bottom: 16px;
}

.flow-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 12px;
}

.flow-card p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* ================= Works Section ================= */
.works {
  background-color: var(--color-paper-alt);
  padding-top: 112px;
  padding-bottom: 112px;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.split-intro {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
}

.works-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}

.work-card {
  background-color: var(--color-paper-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(18, 34, 56, 0.08);
  border-color: var(--color-blue-accent);
}

.work-thumb {
  height: 220px;
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.work-featured .work-thumb {
  height: 260px;
}

.thumb-tool {
  background: linear-gradient(135deg, #122238 0%, #1c3654 100%);
  color: #ffffff;
}

.thumb-web {
  background: linear-gradient(135deg, #cde0e8 0%, #b3cedb 100%);
  color: var(--color-ink);
}

.thumb-creative {
  background: linear-gradient(135deg, #e4d7c5 0%, #d8c2a8 100%);
  color: var(--color-ink);
}

.thumb-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
}

.thumb-web .thumb-badge,
.thumb-creative .thumb-badge {
  background: rgba(0, 0, 0, 0.08);
}

.thumb-art {
  display: flex;
  align-items: flex-end;
}

.art-mono {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.work-meta {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.work-cat {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-blue-accent);
  margin-bottom: 8px;
  display: block;
}

.work-meta h3 {
  font-size: 1.0625rem;
  margin-bottom: 10px;
  line-height: 1.5;
}

.work-meta p {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* ================= Recommended Section ================= */
.recommended {
  padding-top: 112px;
  padding-bottom: 112px;
}

.recommended-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.rec-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 28px;
  background-color: var(--color-paper-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.rec-check {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-blue-light);
  color: var(--color-blue-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.rec-item p {
  font-size: 0.9375rem;
  color: var(--color-ink-soft);
  margin: 0;
  line-height: 1.6;
}

/* ================= Pricing CTA Box ================= */
.pricing-cta {
  padding-bottom: 96px;
}

.pricing-cta-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  background-color: #ffffff;
  border: 1.5px solid var(--color-line-dark);
  border-radius: var(--radius-md);
  padding: 48px;
  box-shadow: 0 10px 30px rgba(18, 34, 56, 0.04);
}

.pricing-cta-text h2 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.pricing-cta-text p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  max-width: 580px;
  margin: 0;
}

/* ================= Contact Section ================= */
.contact {
  background-color: #e9f0f2;
  padding-top: 112px;
  padding-bottom: 112px;
  border-top: 1px solid var(--color-line);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}

.contact-header .section-title {
  margin-bottom: 20px;
}

.contact-lead {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-ink-soft);
  margin-bottom: 36px;
}

/* LINE副導線バナー */
.line-sub-banner {
  background: #ffffff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 4px 16px rgba(18, 34, 56, 0.04);
}

.line-icon-wrap {
  color: var(--color-line-green);
}

.line-info strong {
  display: block;
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.line-info p {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin: 0;
}

/* 通常フォーム (主導線) */
.contact-form-card {
  background-color: #ffffff;
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: 0 12px 36px rgba(18, 34, 56, 0.06);
}

.form-title {
  font-size: 1.25rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.req {
  font-size: 0.6875rem;
  font-weight: 500;
  background-color: #e53e3e;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 2px;
}

.opt {
  font-size: 0.6875rem;
  font-weight: 500;
  background-color: var(--color-line-dark);
  color: var(--color-ink-soft);
  padding: 2px 6px;
  border-radius: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-sm);
  background-color: var(--color-paper);
  color: var(--color-ink);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-blue-accent);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px var(--color-blue-glow);
}

.form-submit-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.form-status {
  margin-top: 16px;
  font-size: 0.875rem;
  min-height: 24px;
}

.form-status.success {
  color: #2b6cb0;
  font-weight: 600;
}

.form-status.error {
  color: #c53030;
  font-weight: 600;
}

/* ================= Footer ================= */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-line);
  padding-top: 80px;
  padding-bottom: 40px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 16px 0 8px;
}

.footer-subtext {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 380px;
}

.footer-nav-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-nav-group h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.footer-nav-group ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-group a {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}

.footer-bottom small {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

.footer-links a {
  font-size: 0.75rem;
  color: var(--color-muted);
}

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

/* ================= Responsive Styles ================= */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .works-grid {
    grid-template-columns: 1fr;
  }
  .work-featured .work-thumb,
  .work-thumb {
    height: 200px;
  }
  .flow-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pricing-cta-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .section-shell {
    padding-left: 20px;
    padding-right: 20px;
  }

  .site-header .header-inner {
    padding: 0 20px;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-paper);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    border-top: 1px solid var(--color-line);
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav a {
    font-size: 1.125rem;
    font-family: var(--font-serif);
    width: 100%;
    border-bottom: 1px solid var(--color-line);
    padding-bottom: 12px;
  }

  .site-nav .nav-sub-link {
    border-left: none;
    padding-left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.is-active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .nav-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.is-active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding-top: 40px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .hero-actions .button {
    width: 100%;
  }

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

  .service-block {
    grid-template-columns: 1fr;
    padding: 28px;
    gap: 20px;
  }

  .sub-service-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .flow-timeline {
    grid-template-columns: 1fr;
  }

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

  .about-values {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-form-card {
    padding: 24px 20px;
  }

  .form-submit-row {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}

/* ================= prefers-reduced-motion ================= */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}