/* ==========================================================================
   Aritect Pars — サイト共通スタイル
   配色：ロゴ（黒地に銀白のAマーク）を踏まえ、
   建築（ブループリントブルー・スチールシルバー）× AI（シアングロー）を融合
   ========================================================================== */

:root {
  --color-white: #ffffff;
  --color-bg-soft: #f4f5f7;
  --color-border: #e3e4e8;
  --color-dark: #1b1c1f;
  --color-dark-soft: #38393d;
  --color-gray: #6b6c72;

  /* ロゴに合わせた漆黒トーン（ヘッダー・ヒーロー・フッターで使用） */
  --color-black: #0b0c0e;
  --color-charcoal: #1b1d21;

  /* 建築（鉄骨・コンクリート）を連想させるシルバー */
  --color-silver: #c9cdd4;

  /* 建築図面のブループリントブルー × AIを印象づけるピンク（ほぼ同量で配合） */
  --color-accent: #3461ff;
  --color-accent-2: #ff3ec8;
  --color-accent-soft: #eaefff;
  --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));

  --font-base: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1140px;
  --radius: 14px;
  --transition: 0.2s ease;
}

/* ----- リセット・基本設定 ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-dark);
  background-color: var(--color-white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 1em;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- 共通：見出し・セクション ----- */
.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--color-bg-soft);
}

.section-head {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.18em;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-title {
  font-size: clamp(28px, 4vw, 36px);
  margin-bottom: 14px;
}

.section-lead {
  color: var(--color-gray);
  font-size: 16px;
  margin: 0;
}

/* ----- ボタン ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

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

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-white);
  box-shadow: 0 10px 28px rgba(0, 119, 255, 0.28);
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-dark);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-dark);
}

.btn-large {
  padding: 16px 48px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ----- ヘッダー（ロゴの黒地に合わせたダークトーン） ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 12, 14, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-white);
}

.logo-mark {
  height: 52px;
  width: auto;
}

/* ----- ナビゲーション（ハンバーガーはCSSのみで開閉） ----- */
.nav {
  position: relative;
}

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

.nav-list a {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

.nav-list a:hover {
  color: var(--color-accent-2);
}

.nav-cta {
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: var(--color-white) !important;
}

.nav-cta:hover {
  filter: brightness(1.1);
  color: var(--color-white) !important;
}

.nav-toggle-input {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
}

.nav-toggle-label span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-white);
  transition: transform var(--transition), opacity var(--transition);
}

/* ----- ヒーロー（ロゴと同じ漆黒地に、設計図グリッド × AIグローを重ねる） ----- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 150px 0 120px;
  background-color: var(--color-black);
  color: var(--color-white);
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, #000 40%, transparent 78%);
          mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, #000 40%, transparent 78%);
}

.hero::after {
  /* 青とピンクをほぼ同量で重ね、AIらしいグラデーショングローを演出 */
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 32% 28%, rgba(52, 97, 255, 0.26), transparent 56%),
    radial-gradient(circle at 70% 62%, rgba(255, 62, 200, 0.24), transparent 56%);
}

/* ロゴのマーク部分のみを、ヒーロー文字の背景にうっすらと配置 */
.hero-mark {
  position: absolute;
  z-index: 0;
  left: 50%;
  top: 46%;
  width: min(640px, 86%);
  aspect-ratio: 1 / 1;
  transform: translate(-50%, -50%);
  background-image: url("../images/logo-mark-transparent.png");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  opacity: 0.10;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero-title {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.35;
  margin: 0 0 24px;
  color: var(--color-white);
}

.hero-lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.66);
  max-width: 560px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.hero .btn-outline {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.32);
}

.hero .btn-outline:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.06);
}

/* ----- カードグリッド共通 ----- */
.card-grid {
  display: grid;
  gap: 28px;
}

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

/* ----- ポートフォリオ ----- */
.portfolio-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.portfolio-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 97, 255, 0.35);
  box-shadow: 0 18px 44px rgba(52, 97, 255, 0.16), 0 4px 18px rgba(255, 62, 200, 0.10);
}

.portfolio-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 22%, rgba(255, 62, 200, 0.18), transparent 55%),
    linear-gradient(135deg, var(--color-charcoal), #34373d);
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.portfolio-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 仮プレースホルダー：事例ごとに異なる配色で多様性を演出 */
.portfolio-thumb-aerial {
  background:
    radial-gradient(circle at 70% 25%, rgba(52, 97, 255, 0.22), transparent 55%),
    linear-gradient(135deg, var(--color-charcoal), #2c3e50);
}

.portfolio-thumb-store {
  background: linear-gradient(135deg, #1b2a4a, #3461ff 75%, #7d9bff);
}

.portfolio-thumb-morning {
  background: linear-gradient(135deg, #dce8ff, #fff4e0);
  color: var(--color-gray);
}

.portfolio-thumb-night {
  background: linear-gradient(135deg, #0b0c14, #20243d 55%, #4a3a6e);
}

.portfolio-body {
  padding: 24px;
}

.portfolio-tag {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 8px;
}

.portfolio-body h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.portfolio-body p:last-child {
  margin-bottom: 0;
  color: var(--color-gray);
  font-size: 14px;
}

/* ----- 料金表 ----- */
.price-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.price-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 97, 255, 0.3);
  box-shadow: 0 18px 44px rgba(52, 97, 255, 0.16), 0 4px 18px rgba(255, 62, 200, 0.10);
}

.price-card-featured {
  border-color: rgba(52, 97, 255, 0.4);
  box-shadow: 0 18px 44px rgba(52, 97, 255, 0.16), 0 4px 18px rgba(255, 62, 200, 0.12);
}

.price-badge {
  position: absolute;
  top: -14px;
  left: 28px;
  background: var(--gradient-accent);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 999px;
}

.price-name {
  font-size: 18px;
  margin-bottom: 12px;
}

.price-amount {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 20px;
}

.price-unit {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray);
  margin-left: 4px;
}

.price-list {
  flex: 1;
  margin-bottom: 28px;
}

.price-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--color-dark-soft);
}

.price-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.pricing-note {
  margin-top: 32px;
  text-align: center;
  font-size: 13px;
  color: var(--color-gray);
}

/* ----- お客様の声 ----- */
.voice-card {
  margin: 0;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.voice-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 97, 255, 0.3);
  box-shadow: 0 18px 44px rgba(52, 97, 255, 0.16), 0 4px 18px rgba(255, 62, 200, 0.10);
}

.voice-text {
  margin: 0;
  font-size: 15px;
  color: var(--color-dark-soft);
  position: relative;
  padding-left: 28px;
}

.voice-text::before {
  content: "\201C";
  position: absolute;
  left: 0;
  top: -6px;
  font-size: 32px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.voice-footer {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-gray);
}

/* ----- 会社情報（About） ----- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-subtitle {
  font-size: 18px;
  margin: 32px 0 12px;
}

.about-subtitle:first-of-type {
  margin-top: 28px;
}

.about-text p {
  color: var(--color-dark-soft);
  font-size: 15px;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.info-table th,
.info-table td {
  padding: 16px 20px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border);
}

.info-table tr:last-child th,
.info-table tr:last-child td {
  border-bottom: none;
}

.info-table th {
  width: 35%;
  color: var(--color-gray);
  font-weight: 700;
  background-color: var(--color-bg-soft);
}

.info-table td {
  color: var(--color-dark-soft);
}

/* ----- 比較表（ページ中央に独立配置し、黒×青×ピンクで目立たせる） ----- */
.comparison {
  max-width: 880px;
  margin: 96px auto 0;
  text-align: center;
}

.comparison-heading {
  font-size: clamp(24px, 3.4vw, 30px);
  margin-bottom: 12px;
}

.comparison-lead {
  max-width: 560px;
  margin: 0 auto 32px;
  color: var(--color-gray);
  font-size: 15px;
}

.comparison-table-wrap {
  overflow-x: auto;
  text-align: left;
  border-radius: var(--radius);
  background-color: #35373d;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow:
    0 32px 80px rgba(52, 97, 255, 0.18),
    0 14px 50px rgba(255, 62, 200, 0.16);
}

.comparison-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  background-color: transparent;
  font-size: 14px;
}

.comparison-table th,
.comparison-table td {
  padding: 18px 22px;
  text-align: left;
  vertical-align: top;
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.comparison-table th:not(:last-child),
.comparison-table td:not(:last-child) {
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.comparison-table tr:last-child th,
.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table thead th {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.07);
}

.comparison-table thead th span {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.8);
}

.comparison-table tbody th {
  width: 26%;
  font-weight: 700;
  font-size: 13px;
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.05);
}

.comparison-table tbody td {
  color: var(--color-white);
}

/* Aritect Pars 列：黒地に青×ピンクのグラデーションを乗せて際立たせる */
.comparison-table .comparison-highlight {
  position: relative;
  color: var(--color-white) !important;
  font-weight: 800;
}

.comparison-table thead .comparison-highlight {
  background: var(--gradient-accent) !important;
  color: var(--color-white) !important;
}

.comparison-table thead .comparison-highlight span {
  color: rgba(255, 255, 255, 0.85);
}

.comparison-table tbody td.comparison-highlight {
  background: linear-gradient(135deg, rgba(52, 97, 255, 0.32), rgba(255, 62, 200, 0.28)) !important;
}

.comparison-table tbody td.comparison-highlight::before {
  content: "\2713";
  display: inline-block;
  margin-right: 8px;
  font-weight: 800;
  color: var(--color-white);
}

.comparison-note {
  margin: 18px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--color-gray);
}

/* ----- お問い合わせフォーム ----- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
}

.form-row {
  margin-bottom: 24px;
}

.form-row label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-dark-soft);
}

.required {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  border-radius: 4px;
  vertical-align: middle;
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 15px;
  color: var(--color-dark);
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  transition: border-color var(--transition), background-color var(--transition);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-white);
}

.form-row textarea {
  resize: vertical;
}

.contact-form .btn {
  margin-top: 8px;
}

/* ----- フォーム送信 結果メッセージ ----- */
.contact-result {
  text-align: center;
  padding: 48px 24px;
  max-width: 480px;
  margin: 0 auto;
}

.contact-result-icon {
  font-size: 2.5rem;
  color: var(--color-cyan);
  margin: 0 0 16px;
}

.contact-result-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 12px;
}

.contact-result-body {
  font-size: 0.95rem;
  color: var(--color-gray);
  line-height: 1.8;
  margin: 0;
}

.contact-result-error .contact-result-title {
  color: #c0392b;
}

/* ----- フッター（ロゴと同じ漆黒トーン） ----- */
.site-footer {
  background-color: var(--color-black);
  color: rgba(255, 255, 255, 0.6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 56px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 0.04em;
  margin: 0;
}

.footer-logo-mark {
  height: 44px;
  width: auto;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-nav a {
  font-size: 14px;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--color-accent-2);
}

.footer-copy {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
  margin: 0;
}

/* ----- 法的ページ（特定商取引法に基づく表示・利用規約など） ----- */
.legal-page {
  padding-top: 64px;
}

.legal-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: left;
}

.legal-version {
  font-size: 13px;
  color: var(--color-gray);
  margin: 16px 0 0;
}

.legal-notice {
  margin: 0 0 32px;
  padding: 18px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--color-accent-soft);
  background-color: var(--color-accent-soft);
  font-size: 14px;
  color: var(--color-dark);
}

.legal-notice p {
  margin: 0;
}

.legal-notice strong {
  color: var(--color-accent);
}

.legal-content {
  max-width: 760px;
  margin: 0 auto;
  color: var(--color-dark-soft);
  font-size: 15px;
  line-height: 1.8;
}

.legal-content h2 {
  font-size: 20px;
  color: var(--color-dark);
  margin: 40px 0 16px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.legal-content h2:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-content h3 {
  font-size: 16px;
  color: var(--color-dark);
  margin: 24px 0 10px;
}

.legal-content p {
  margin: 0 0 16px;
}

.legal-content ul {
  margin: 0 0 16px;
  padding-left: 0;
  list-style: none;
}

.legal-content ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}

.legal-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-accent);
}

.legal-content ol {
  margin: 0 0 16px;
  padding-left: 24px;
}

.legal-content ol li {
  margin-bottom: 10px;
}

.legal-content li > ol,
.legal-content li > ul {
  margin: 10px 0 0;
}

.legal-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.legal-table th,
.legal-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.legal-table tr:last-child th,
.legal-table tr:last-child td {
  border-bottom: none;
}

.legal-table th {
  width: 38%;
  color: var(--color-gray);
  font-weight: 700;
  background-color: var(--color-bg-soft);
}

.legal-table td {
  color: var(--color-dark-soft);
}

.legal-history-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 13px;
}

.legal-history-table th,
.legal-history-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.legal-history-table thead th {
  background-color: var(--color-bg-soft);
  color: var(--color-gray);
  font-weight: 700;
}

.legal-history-table tbody tr:last-child th,
.legal-history-table tbody tr:last-child td {
  border-bottom: none;
}

.legal-meta {
  font-size: 12px;
  color: var(--color-gray);
  margin-top: 40px;
}

.legal-back {
  margin-top: 16px;
}

/* ==========================================================================
   レスポンシブ対応（タブレット・スマートフォン）
   ========================================================================== */

@media (max-width: 1024px) {
  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .hero {
    padding: 110px 0 80px;
  }

  .comparison {
    margin-top: 64px;
  }

  /* ハンバーガーメニュー（チェックボックス + ラベルでJS不要の開閉） */
  .nav-toggle-label {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-charcoal);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: max-height var(--transition), opacity var(--transition), transform var(--transition);
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 16px 24px;
    width: 100%;
    color: rgba(255, 255, 255, 0.78);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  .nav-cta {
    border-radius: 0;
    text-align: center;
    background: var(--gradient-accent) !important;
    color: var(--color-white) !important;
  }

  .nav-toggle-input:checked ~ .nav-list {
    max-height: 480px;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-toggle-input:checked + .nav-toggle-label span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle-input:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle-input:checked + .nav-toggle-label span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 640px) {
  .card-grid-3 {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-form {
    padding: 28px 20px;
  }

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

  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
  }

  .legal-table th {
    border-bottom: none;
  }

  .legal-table td {
    padding-top: 0;
  }

  .legal-history-table {
    font-size: 12px;
  }

  .legal-history-table th,
  .legal-history-table td {
    padding: 8px 10px;
  }

  /* 比較表：横スクロールなしのカード積み上げ表示 */
  .comparison-table-wrap {
    overflow-x: visible;
  }

  .comparison-table {
    min-width: 0;
    display: block;
  }

  .comparison-table thead {
    display: none;
  }

  .comparison-table tbody {
    display: block;
  }

  .comparison-table tbody tr {
    display: block;
    margin-bottom: 10px;
    border-radius: 8px;
    overflow: hidden;
    border-bottom: none;
  }

  /* 比較項目名（カードのタイトル行） */
  .comparison-table tbody th[scope="row"] {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 10px 14px;
    font-size: 12px;
    background-color: rgba(255, 255, 255, 0.09);
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  /* 各セル（従来 / Aritect Pars） */
  .comparison-table tbody td {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 8px 14px 10px;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .comparison-table tbody td:last-child {
    border-bottom: none;
  }

  /* 「従来の人力パース制作会社」ラベル */
  .comparison-table tbody td:not(.comparison-highlight)::before {
    content: "従来の人力パース制作会社";
    display: block;
    font-size: 10px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.42);
    letter-spacing: 0.06em;
    margin-bottom: 3px;
  }

  /* 「Aritect Pars」ラベル（デスクトップの✓チェックマークを上書き） */
  .comparison-table tbody td.comparison-highlight::before {
    content: "Aritect Pars";
    display: block;
    font-size: 10px;
    font-weight: 700;
    color: #a0b4ff;
    letter-spacing: 0.06em;
    margin-bottom: 3px;
    margin-right: 0;
  }

  /* 最終行のカード下余白をリセット */
  .comparison-table tbody tr:last-child {
    margin-bottom: 0;
  }
}