/*
Theme Name: Andy works
Theme URI: https://andyworks.jp
Author: Andy works
Author URI: https://andyworks.jp
Description: 中小企業・製造業のAI伴走者「Andy works」公式サイト用カスタムテーマ。現場感・誠実さ・可読性を重視した専用デザインシステム。
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: andyworks
*/

/* ==========================================================================
   0. リセット / 基本設定
   ========================================================================== */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  padding: 0;
}

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

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

a {
  color: inherit;
}

button {
  font-family: inherit;
}

/* ==========================================================================
   1. デザイントークン
   ========================================================================== */

:root {
  /* カラー */
  --aw-ink: #1b2430;
  --aw-ink-soft: #3c4757;
  --aw-primary: #1f3a54;
  --aw-primary-dark: #14283b;
  --aw-accent: #b8862e;
  --aw-accent-dark: #8f6a20;
  --aw-bg: #f6f4ef;
  --aw-surface: #eae6dc;
  --aw-surface-strong: #ded8c8;
  --aw-charcoal: #14181d;
  --aw-charcoal-soft: #232a33;
  --aw-border: #d8d2c4;
  --aw-white: #ffffff;

  /* フォント */
  --aw-font-serif: "Zen Old Mincho", "游明朝", "Yu Mincho", serif;
  --aw-font-sans: "Zen Kaku Gothic New", "游ゴシック体", "Yu Gothic",
    "Hiragino Kaku Gothic ProN", sans-serif;

  /* レイアウト */
  --aw-container: 1120px;
  --aw-container-narrow: 760px;
  --aw-radius: 2px;
  --aw-section-space: clamp(4.5rem, 8vw, 8rem);
}

/* ==========================================================================
   2. タイポグラフィ基本
   ========================================================================== */

body {
  font-family: var(--aw-font-sans);
  font-size: 1.125rem; /* 18px */
  line-height: 1.9;
  color: var(--aw-ink);
  background-color: var(--aw-bg);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  word-break: normal;
  overflow-wrap: break-word;
  letter-spacing: 0.02em;
}

h1,
h2,
h3,
h4 {
  font-family: var(--aw-font-serif);
  font-weight: 700;
  color: var(--aw-ink);
  line-height: 1.55;
  letter-spacing: 0.03em;
  margin: 0;
}

p {
  margin: 0 0 1.4em;
  max-width: 38em;
}

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

.aw-lead {
  font-size: 1.2rem;
  line-height: 2;
}

/* 見出しスケール */
.aw-h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.5;
}

.aw-h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
}

.aw-h3 {
  font-family: var(--aw-font-sans);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.aw-eyebrow {
  display: inline-block;
  font-family: var(--aw-font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--aw-accent-dark);
  letter-spacing: 0.15em;
  margin-bottom: 0.9rem;
}

/* ==========================================================================
   3. レイアウトユーティリティ
   ========================================================================== */

.aw-container {
  width: 100%;
  max-width: var(--aw-container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.aw-container--narrow {
  max-width: var(--aw-container-narrow);
}

.aw-section {
  padding: var(--aw-section-space) 0;
  position: relative;
}

.aw-section--surface {
  background-color: var(--aw-surface);
}

.aw-section--dark {
  background-color: var(--aw-charcoal);
  color: #eceae4;
}

.aw-section--dark h2,
.aw-section--dark h3 {
  color: #f5f3ee;
}

.aw-section-title {
  max-width: 42em;
  margin-bottom: 3rem;
}

.aw-section-title--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.aw-section-title p {
  margin-top: 1.1rem;
  color: var(--aw-ink-soft);
}

.aw-rule {
  border: none;
  border-top: 1px solid var(--aw-border);
  margin: 0;
}

.aw-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--aw-primary);
  color: #fff;
  padding: 0.8rem 1.2rem;
  z-index: 1000;
}

.aw-skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 3px solid var(--aw-accent);
  outline-offset: 3px;
}

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

/* ==========================================================================
   4. ボタン / CTA
   ========================================================================== */

.aw-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--aw-font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  text-decoration: none;
  padding: 1.05rem 2.1rem;
  border-radius: var(--aw-radius);
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.4;
  transition: background-color 0.2s ease, color 0.2s ease,
    border-color 0.2s ease;
}

.aw-btn--primary {
  background-color: var(--aw-primary);
  color: #ffffff;
}

.aw-btn--primary:hover,
.aw-btn--primary:focus-visible {
  background-color: var(--aw-primary-dark);
}

.aw-btn--accent {
  background-color: var(--aw-accent);
  color: #1b1400;
}

.aw-btn--accent:hover,
.aw-btn--accent:focus-visible {
  background-color: var(--aw-accent-dark);
  color: #ffffff;
}

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

.aw-btn--outline:hover,
.aw-btn--outline:focus-visible {
  background-color: var(--aw-primary);
  color: #ffffff;
}

.aw-btn--ghost-light {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.6);
}

.aw-btn--ghost-light:hover,
.aw-btn--ghost-light:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
}

.aw-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* ==========================================================================
   5. ヘッダー
   ========================================================================== */

.aw-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background-color: rgba(246, 244, 239, 0.94);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--aw-border);
}

.aw-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
  gap: 1.5rem;
}

.aw-logo {
  font-family: var(--aw-font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--aw-ink);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.aw-logo span {
  display: block;
  font-family: var(--aw-font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--aw-ink-soft);
  letter-spacing: 0.12em;
  margin-top: 0.15rem;
}

.aw-nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.aw-nav__list {
  display: flex;
  list-style: none;
  gap: 1.9rem;
  margin: 0;
  padding: 0;
}

.aw-nav__list a {
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--aw-ink);
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.aw-nav__list a:hover,
.aw-nav__list a:focus-visible {
  border-color: var(--aw-accent);
}

.aw-header__cta {
  flex-shrink: 0;
}

.aw-header .aw-btn {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.aw-header__cta--mobile {
  display: none;
}

.aw-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--aw-border);
  border-radius: var(--aw-radius);
  padding: 0.5rem 0.7rem;
  cursor: pointer;
}

.aw-menu-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--aw-ink);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ==========================================================================
   6. ヒーロー
   ========================================================================== */

.aw-hero {
  padding-top: clamp(3rem, 8vw, 5.5rem);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
  background: linear-gradient(180deg, #f9f8f4 0%, var(--aw-bg) 100%);
}

.aw-hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.aw-hero__copy .aw-eyebrow {
  color: var(--aw-primary);
}

.aw-hero h1 {
  margin-bottom: 1.6rem;
}

.aw-hero__sub {
  font-family: var(--aw-font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--aw-primary);
  margin-bottom: 1.4rem;
  line-height: 1.8;
}

.aw-hero__body {
  color: var(--aw-ink-soft);
  margin-bottom: 2.2rem;
  font-size: 1.15rem;
}

.aw-hero__note {
  margin-top: 1.4rem;
  font-size: 0.98rem;
  color: var(--aw-ink-soft);
}

/* ==========================================================================
   7. 画像プレースホルダー
   ========================================================================== */

.aw-placeholder-image {
  position: relative;
  width: 100%;
  aspect-ratio: var(--aw-ratio, 4 / 3);
  overflow: hidden;
  border: 1px solid var(--aw-border);
  background-color: var(--aw-surface);
}

.aw-placeholder-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.aw-placeholder-image__label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  color: #fff;
  background-color: rgba(20, 24, 29, 0.72);
  padding: 0.5rem 0.8rem;
  letter-spacing: 0.02em;
}

/* ==========================================================================
   8. PROBLEM
   ========================================================================== */

.aw-problem__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.aw-problem-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.aw-problem-list li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  font-size: 1.1rem;
  padding: 1rem 1.2rem;
  background-color: var(--aw-white);
  border: 1px solid var(--aw-border);
}

.aw-problem-list li::before {
  content: "";
  flex-shrink: 0;
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.55rem;
  background-color: var(--aw-accent);
}

.aw-problem-message {
  margin-top: var(--aw-section-space);
  text-align: center;
}

.aw-problem-message__main {
  font-family: var(--aw-font-serif);
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  color: var(--aw-primary);
  line-height: 1.7;
  margin-bottom: 1.6rem;
}

.aw-problem-message__sub {
  max-width: 42em;
  margin: 0 auto;
  color: var(--aw-ink-soft);
  font-size: 1.15rem;
}

/* ==========================================================================
   9. PHILOSOPHY
   ========================================================================== */

.aw-philosophy__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.aw-philosophy blockquote {
  margin: 0 0 1.8rem;
  font-family: var(--aw-font-serif);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.85;
  color: var(--aw-ink);
  border-left: 3px solid var(--aw-accent);
  padding-left: 1.6rem;
}

.aw-philosophy p {
  color: var(--aw-ink-soft);
}

/* ==========================================================================
   10. SERVICE
   ========================================================================== */

.aw-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.aw-service-card {
  background-color: var(--aw-white);
  border: 1px solid var(--aw-border);
  padding: 2rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.aw-service-card__number {
  font-family: var(--aw-font-serif);
  font-size: 1rem;
  color: var(--aw-accent-dark);
  letter-spacing: 0.1em;
}

.aw-service-card h3 {
  margin-bottom: 0.2rem;
}

.aw-service-card p {
  color: var(--aw-ink-soft);
  font-size: 1.02rem;
}

.aw-service-card__examples {
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid var(--aw-border);
  font-size: 0.95rem;
  color: var(--aw-ink-soft);
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.aw-service-card__examples li::before {
  content: "・";
  color: var(--aw-accent-dark);
}

.aw-service-flow {
  margin-top: 3rem;
  padding: 1.8rem 2rem;
  background-color: var(--aw-primary);
  color: #fff;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  font-size: 1.05rem;
}

.aw-service-flow__item {
  font-weight: 700;
}

.aw-service-flow__arrow {
  color: var(--aw-accent);
}

/* ==========================================================================
   11. WHY ANDY WORKS
   ========================================================================== */

.aw-reason-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.aw-reason {
  padding-top: 2rem;
  border-top: 3px solid var(--aw-accent);
}

.aw-reason h3 {
  margin-bottom: 0.9rem;
  font-size: 1.4rem;
}

.aw-reason p {
  color: var(--aw-ink-soft);
}

/* ==========================================================================
   12. USE CASE
   ========================================================================== */

.aw-usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.8rem;
}

.aw-usecase-card {
  background-color: var(--aw-white);
  border: 1px solid var(--aw-border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.aw-usecase-card__body {
  padding: 1.8rem;
}

.aw-usecase-card__tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--aw-primary);
  background-color: var(--aw-surface);
  padding: 0.3rem 0.7rem;
  margin-bottom: 0.9rem;
}

.aw-usecase-card h3 {
  margin-bottom: 0.7rem;
}

.aw-usecase-card p {
  color: var(--aw-ink-soft);
  font-size: 1.02rem;
}

.aw-usecase-note {
  margin-top: 2rem;
  color: var(--aw-ink-soft);
  font-size: 0.98rem;
}

/* ==========================================================================
   13. PROCESS
   ========================================================================== */

.aw-process-list {
  display: flex;
  flex-direction: column;
}

.aw-process-step {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1.6rem;
  padding: 2rem 0;
  border-top: 1px solid var(--aw-border);
}

.aw-process-list .aw-process-step:last-child {
  border-bottom: 1px solid var(--aw-border);
}

.aw-process-step__number {
  font-family: var(--aw-font-serif);
  font-size: 2.2rem;
  color: var(--aw-accent);
  line-height: 1;
}

.aw-process-step h3 {
  margin-bottom: 0.6rem;
}

.aw-process-step p {
  color: var(--aw-ink-soft);
}

/* ==========================================================================
   14. ABOUT
   ========================================================================== */

.aw-about__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.aw-about h2 {
  margin-bottom: 1.4rem;
}

.aw-about p {
  color: var(--aw-ink-soft);
  max-width: 42em;
}

.aw-about__role {
  margin-top: 1.6rem;
  font-weight: 700;
  color: var(--aw-primary);
}

/* ==========================================================================
   15. BLOG
   ========================================================================== */

.aw-blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.aw-blog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--aw-white);
  border: 1px solid var(--aw-border);
}

.aw-blog-card__body {
  padding: 1.6rem;
}

.aw-blog-card__cat {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--aw-accent-dark);
  margin-bottom: 0.7rem;
}

.aw-blog-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.aw-blog-card p {
  color: var(--aw-ink-soft);
  font-size: 1rem;
}

.aw-blog-card__date {
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--aw-ink-soft);
}

.aw-blog-card a.aw-blog-card__link {
  text-decoration: none;
  color: var(--aw-primary);
  font-weight: 700;
  display: inline-block;
  margin-top: 1rem;
}

/* ==========================================================================
   16. FAQ
   ========================================================================== */

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

.aw-faq-item__question::-webkit-details-marker {
  display: none;
}

.aw-faq-item {
  border-bottom: 1px solid var(--aw-border);
}

.aw-faq-item__question {
  list-style: none;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0.2rem;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--aw-ink);
}

.aw-faq-item__icon {
  flex-shrink: 0;
  width: 1.4rem;
  height: 1.4rem;
  position: relative;
}

.aw-faq-item__icon::before,
.aw-faq-item__icon::after {
  content: "";
  position: absolute;
  background-color: var(--aw-primary);
  transition: transform 0.2s ease;
}

.aw-faq-item__icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.aw-faq-item__icon::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.aw-faq-item[open] .aw-faq-item__icon::after {
  transform: translateX(-50%) scaleY(0);
}

.aw-faq-item__answer {
  padding: 0 0.2rem 1.6rem;
  color: var(--aw-ink-soft);
}

/* ==========================================================================
   17. CTA帯
   ========================================================================== */

.aw-cta-band {
  background-color: var(--aw-primary);
  color: #fff;
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  text-align: center;
}

.aw-cta-band h2 {
  color: #fff;
  margin-bottom: 1rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.aw-cta-band p {
  color: #dfe6ec;
  max-width: 40em;
  margin: 0 auto 1.8rem;
}

.aw-cta-band .aw-btn-group {
  justify-content: center;
}

/* ==========================================================================
   18. CONTACT
   ========================================================================== */

.aw-contact__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.aw-contact__intro p {
  color: var(--aw-ink-soft);
}

.aw-contact__note {
  margin-top: 1.6rem;
  padding: 1.2rem 1.4rem;
  background-color: var(--aw-surface);
  border-left: 3px solid var(--aw-accent);
  font-size: 1rem;
}

.aw-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.aw-form__row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.aw-form label {
  font-weight: 700;
  font-size: 1.02rem;
}

.aw-form__required {
  color: var(--aw-accent-dark);
  font-size: 0.85rem;
  font-weight: 700;
  margin-left: 0.4rem;
}

.aw-form input[type="text"],
.aw-form input[type="email"],
.aw-form textarea {
  font-family: var(--aw-font-sans);
  font-size: 1.05rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--aw-border);
  border-radius: var(--aw-radius);
  background-color: #fff;
  color: var(--aw-ink);
}

.aw-form textarea {
  min-height: 9rem;
  resize: vertical;
}

.aw-form__hint {
  font-size: 0.95rem;
  color: var(--aw-ink-soft);
}

.aw-form__submit {
  align-self: flex-start;
}

.aw-form__notice {
  padding: 1rem 1.2rem;
  border: 1px solid var(--aw-border);
  font-size: 1rem;
}

.aw-form__notice--success {
  background-color: #eef4ec;
  border-color: #b9d2b1;
}

.aw-form__notice--error {
  background-color: #f7ecea;
  border-color: #e0b4ac;
}

/* ==========================================================================
   19. フッター
   ========================================================================== */

.aw-footer {
  background-color: var(--aw-charcoal);
  color: #cfd3d8;
  padding: 4rem 0 2rem;
}

.aw-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.9fr 1.1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.aw-footer__brand .aw-logo {
  color: #fff;
}

.aw-footer__brand .aw-logo span {
  color: #a9afb6;
}

.aw-footer__brand p {
  margin-top: 1.2rem;
  color: #a9afb6;
  font-size: 1rem;
  max-width: 26em;
}

.aw-footer h3 {
  font-family: var(--aw-font-sans);
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1.1rem;
  letter-spacing: 0.05em;
}

.aw-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.aw-footer__links a {
  text-decoration: none;
  color: #cfd3d8;
  font-size: 0.98rem;
}

.aw-footer__links a:hover,
.aw-footer__links a:focus-visible {
  color: #fff;
}

.aw-footer__bottom {
  padding-top: 1.6rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: #8b9198;
}

.aw-footer__bottom a {
  color: #8b9198;
  text-decoration: none;
}

.aw-footer__bottom a:hover,
.aw-footer__bottom a:focus-visible {
  color: #fff;
}

/* ==========================================================================
   20. レスポンシブ（タブレット）
   ========================================================================== */

@media (max-width: 1024px) {
  .aw-hero__grid,
  .aw-philosophy__grid,
  .aw-about__grid,
  .aw-contact__grid {
    grid-template-columns: 1fr;
  }

  .aw-hero__image {
    order: -1;
  }

  .aw-service-grid,
  .aw-reason-grid,
  .aw-blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .aw-problem__grid {
    grid-template-columns: 1fr;
  }

  .aw-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ==========================================================================
   21. レスポンシブ（スマートフォン）
   ========================================================================== */

@media (max-width: 640px) {
  :root {
    --aw-section-space: 3.4rem;
  }

  body {
    font-size: 1.0625rem; /* 17px */
    line-height: 1.85;
  }

  .aw-container {
    padding: 0 1.2rem;
  }

  .aw-header__inner {
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
  }

  .aw-nav {
    position: fixed;
    inset: 0;
    top: 64px;
    background-color: var(--aw-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
  }

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

  .aw-nav__list {
    flex-direction: column;
    gap: 0;
  }

  .aw-nav__list a {
    display: block;
    padding: 1rem 0.2rem;
    font-size: 1.15rem;
    border-bottom: 1px solid var(--aw-border);
  }

  .aw-header__cta--desktop {
    display: none;
  }

  .aw-header__cta--mobile {
    display: block;
    width: 100%;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--aw-border);
  }

  .aw-header__cta .aw-btn {
    width: 100%;
  }

  .aw-menu-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
  }

  .aw-hero__sub {
    font-size: 1.1rem;
  }

  .aw-btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .aw-btn {
    width: 100%;
  }

  .aw-service-grid,
  .aw-reason-grid,
  .aw-usecase-grid,
  .aw-blog-grid {
    grid-template-columns: 1fr;
  }

  .aw-process-step {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .aw-process-step__number {
    font-size: 1.6rem;
  }

  .aw-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .aw-footer__bottom {
    flex-direction: column;
  }

  .aw-service-flow {
    flex-direction: column;
    align-items: flex-start;
  }
}