:root {
  --color-primary: #2a9d8f;
  --color-primary-dark: #1f7a6f;
  --color-brand-dark: #10302d;
  --color-brand-deep-accent: #17403c;
  --color-accent: #e76f51;
  --color-text-head: #10302d;
  --color-text-body: #333333;
  --color-gray-light: #f4f4f4;
  --color-white: #ffffff;
  --color-border: #e2e8f0;
  --container-width: 1200px;
  --header-height: 60px;
  --font-main: 'Inter', 'Noto Sans JP', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html.line-integration-root {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 40px);
}

body.line-integration-body {
  margin: 0;
  font-family: var(--font-main);
  background-color: var(--color-white);
  color: var(--color-text-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.04em;
  overflow-x: hidden;
  width: 100%;
  padding-top: var(--header-height);
}

.line-integration {
  width: 100%;
}

.line-integration a {
  text-decoration: none;
  transition: all 0.3s ease;
}

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

.line-integration h1,
.line-integration h2,
.line-integration h3,
.line-integration h4 {
  font-weight: 800;
  color: var(--color-text-head);
  line-height: 1.4;
}

.line-integration p {
  margin-bottom: 2rem;
  text-align: justify;
}

.line-integration strong {
  color: var(--color-brand-dark);
  font-weight: 700;
  background: linear-gradient(transparent 60%, rgba(42, 157, 143, 0.2) 60%);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  z-index: 1100;
  backdrop-filter: blur(8px);
}

.header-container {
  width: 100%;
  max-width: 1840px;
  margin: 0 auto;
  padding: 0 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  position: relative;
}

.logo img {
  width: 120px;
  height: 24px;
  display: block;
}

.site-header nav ul {
  display: flex;
  gap: 2.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header nav ul li a {
  font-size: 0.87rem;
  font-weight: 700;
  color: var(--color-brand-dark);
  padding: 5px 0;
  transition: color 0.3s ease;
}

.site-header nav ul li a:hover {
  color: var(--color-primary);
}

.header-buttons {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.login-button,
.cta-button,
.mobile-login-text {
  font-size: 0.87rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.5rem 1.3rem;
  border: 1px solid transparent;
}

.login-button {
  border-color: transparent;
  color: var(--color-brand-dark);
}

.cta-button {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(42, 157, 143, 0.25);
}

.cta-button:hover {
  opacity: 0.9;
}

.mobile-login-text {
  display: none;
  color: var(--color-primary);
  padding: 0;
}

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.3s ease;
  z-index: 1300;
}

.mobile-menu-toggle:hover {
  background: rgba(42, 157, 143, 0.08);
}

.menu-icon {
  position: relative;
  width: 18px;
  height: 2px;
  background: var(--color-brand-dark);
  border-radius: 1px;
  display: inline-block;
  transition: background 0.3s ease;
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-brand-dark);
  border-radius: 1px;
  transition: all 0.3s ease;
}

.menu-icon::before {
  top: -5px;
}

.menu-icon::after {
  top: 5px;
}

.mobile-menu-toggle.active .menu-icon {
  background: transparent;
}

.mobile-menu-toggle.active .menu-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-toggle.active .menu-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1200;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-left: 1px solid rgba(42, 157, 143, 0.1);
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
  transform: translateX(100%);
  transition: transform 0.3s ease, opacity 0.3s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  z-index: 1300;
}

.mobile-menu.active {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

body.line-integration-body.menu-open {
  overflow: hidden;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: var(--header-height);
  border-bottom: 1px solid rgba(42, 157, 143, 0.1);
  padding: 0 20px;
}

.mobile-menu-login-text {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.mobile-menu-logo img {
  width: 120px;
  height: 24px;
}

.mobile-menu-close {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(42, 157, 143, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.3s ease, background 0.3s ease;
}

.mobile-menu-close:hover {
  transform: translateY(-50%) rotate(90deg);
  background: rgba(42, 157, 143, 0.2);
}

.mobile-menu-close-icon {
  position: relative;
  width: 20px;
  height: 20px;
}

.mobile-menu-close-icon::before,
.mobile-menu-close-icon::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  top: 50%;
  left: 0;
}

.mobile-menu-close-icon::before {
  transform: rotate(45deg);
}

.mobile-menu-close-icon::after {
  transform: rotate(-45deg);
}

.mobile-menu ul {
  flex: 1 1 auto;
  min-height: 0;
  list-style: none;
  margin: 0;
  padding: 40px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu ul::after {
  content: '';
  display: block;
  height: 1px;
  background: #e0e0e0;
  margin-top: 10px;
}

.mobile-menu ul li {
  margin-bottom: 20px;
}

.mobile-menu ul li a {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-brand-dark);
  display: inline-block;
  transition: color 0.3s ease, transform 0.3s ease;
}

.mobile-menu ul li a:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

.mobile-menu-buttons {
  padding: 30px 40px calc(40px + env(safe-area-inset-bottom));
}

.mobile-cta-button {
  display: block;
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
  padding: 12px 24px;
  border-radius: 999px;
  text-align: center;
  font-weight: 600;
  background: var(--color-primary);
  color: #fff;
  transition: opacity 0.3s ease;
}

.mobile-cta-button:hover {
  opacity: 0.9;
}

.hero {
  background-image: linear-gradient(rgba(16, 48, 45, 0.7), rgba(16, 48, 45, 0.85)), url('https://assets.pecochat.co.jp/static/img/blog/line_auto_response/hero.avif?v=1764813403');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  padding: 80px 0 110px;
  color: var(--color-white);
  position: relative;
}

.hero-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.hero-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  margin-bottom: 2.5rem;
  padding-left: 1rem;
  border-left: 5px solid var(--color-primary);
  color: #ffffff;
}

.hero-title-group {
  margin-bottom: 2.5rem;
}

.hero-title-main {
  display: block;
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.hero-title-sub {
  display: block;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #e0f2f1;
  line-height: 1.3;
}

.hero-desc {
  font-size: 1.25rem;
  color: #e5e5e5;
  max-width: 700px;
  margin-bottom: 4rem;
  font-weight: 400;
  line-height: 1.8;
}

.meta-grid {
  display: flex;
  gap: 4rem;
  border-top: 1px solid rgba(255,255,255,0.3);
  padding-top: 2.5rem;
}

.meta-item label {
  display: block;
  font-size: 0.75rem;
  color: #aaa;
  margin-bottom: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.meta-item span {
  font-weight: 600;
  font-size: 1rem;
  color: white;
}

.content-wrapper {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 64px;
}

.article-main {
  padding: 80px 0;
  border-right: 1px solid var(--color-border);
  padding-right: 64px;
  min-width: 0;
}

.article-main [id] {
  scroll-margin-top: calc(var(--header-height) + 40px);
}

.section-anchor {
  display: block;
  height: 1px;
  width: 100%;
  scroll-margin-top: calc(var(--header-height) + 40px);
}

.insight-box {
  background: var(--color-brand-dark);
  color: white;
  padding: 4rem;
  margin-bottom: 6rem;
  position: relative;
  border-radius: 0;
  background-image: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand-deep-accent) 100%);
}

.insight-box::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: var(--color-primary);
}

.insight-label {
  font-size: 0.8rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  font-weight: 800;
  margin-bottom: 2rem;
  display: block;
}

.insight-quote {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 2rem;
  display: block;
  color: #ffffff;
}

.insight-box p {
  color: #e0f2f1;
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 0;
}

.insight-box strong {
  color: white;
  background: none;
  border-bottom: 1px solid var(--color-primary);
}

.line-integration h2 {
  font-size: 2.2rem;
  margin: 6rem 0 3rem;
  color: var(--color-brand-dark);
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  scroll-margin-top: 120px;
}

.line-integration h2::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  margin-right: 0.5rem;
  transform: translateY(2px);
}

.line-integration h3 {
  font-size: 1.6rem;
  margin: 4rem 0 2rem;
  color: var(--color-brand-dark);
  border-bottom: 2px solid var(--color-brand-dark);
  padding-bottom: 1rem;
  display: inline-block;
  scroll-margin-top: 120px;
}

.howto-steps {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  margin: 3rem 0 5rem;
}

.step-card {
  border: 1px solid var(--color-border);
  background: #fff;
  position: relative;
}

.step-header {
  background: var(--color-brand-dark);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.step-badge {
  background: var(--color-primary);
  color: white;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.3rem 0.8rem;
  letter-spacing: 0.05em;
}

.step-header h3 {
  margin: 0;
  font-size: 1.2rem;
  color: white;
  border-bottom: none;
  padding-bottom: 0;
  display: inline-block;
}

.step-body {
  padding: 2.5rem;
}

.step-list {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

.step-list li {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  position: relative;
  font-size: 1rem;
}

.step-list li::before {
  content: '';
  position: absolute;
  top: 0.6rem;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

.note {
  display: block;
  font-size: 0.85rem;
  color: #666;
  margin-top: 0.4rem;
}

.step-image {
  margin-top: 2rem;
  border: 1px solid var(--color-border);
  padding: 0;
  background: #fafafa;
}

.step-image img {
  display: block;
  width: 100%;
  height: auto;
}

.result-image-wrapper {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  padding: 2rem;
  margin: 3rem 0;
  text-align: left;
}

.result-image-wrapper img {
  max-width: 350px;
  width: 100%;
  margin: 0 auto;
  border: 1px solid #e2e8f0;
  display: block;
}

.result-image-title {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-brand-dark);
}

.result-image-text {
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.8;
  color: #444;
}

.section-subheading {
  margin-top: 2rem;
}

.pro-tip-box {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-primary);
  padding: 2.5rem;
  margin: 3rem 0;
}

.pro-tip-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-brand-dark);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.pro-tip-title svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.pro-tip-content p {
  font-size: 0.95rem;
  color: #444;
  margin-bottom: 1.5rem;
}

.pro-tip-content p:last-child {
  margin-bottom: 0;
}

.comparison-container {
  width: 100%;
  overflow-x: auto;
  margin: 3rem 0;
  border: 1px solid var(--color-border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 700px;
}

.comparison-table th, .comparison-table td {
  padding: 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.comparison-table th {
  background-color: var(--color-brand-dark);
  color: var(--color-white);
  font-weight: 800;
  letter-spacing: 0.05em;
  width: 20%;
}

.table-heading-sub {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0;
  color: #d1d5db;
  margin-top: 0.15rem;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
}

.comparison-table th:first-child {
  z-index: 2;
  box-shadow: 6px 0 15px rgba(0, 0, 0, 0.08);
}

.comparison-table td:first-child {
  background: #fff;
  font-weight: 700;
  box-shadow: 6px 0 15px rgba(0, 0, 0, 0.05);
}

.col-standard {
  background-color: #fcfcfc;
  color: #666;
  width: 30%;
}

.col-line-ai {
  background-color: #f4f8fb;
  color: #333;
  width: 30%;
  font-weight: 600;
}

.col-peco {
  background-color: #ffffff;
  width: 40%;
  border-left: 4px solid var(--color-primary);
  border-right: 4px solid var(--color-primary);
  font-weight: 700;
  color: var(--color-brand-dark);
  position: relative;
}

.col-peco::before {
  content: 'RECOMMENDED';
  position: absolute;
  top: -10px;
  right: 10px;
  background: var(--color-accent);
  color: white;
  font-size: 0.6rem;
  padding: 2px 6px;
  font-weight: 800;
  border-radius: 4px;
  display: none;
}

.trial-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: 2.5rem 0 3.5rem;
  padding: 2.4rem 2.8rem;
  border: 1px solid rgba(16, 48, 45, 0.12);
  background: linear-gradient(135deg, rgba(16, 48, 45, 0.06) 0%, rgba(42, 157, 143, 0.08) 100%);
  position: relative;
  overflow: hidden;
}

.trial-cta::after {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 180px;
  height: 180px;
  background: var(--color-primary);
  opacity: 0.12;
  transform: rotate(25deg);
}

.trial-cta-text {
  position: relative;
  z-index: 1;
  max-width: 560px;
}

.trial-cta-eyebrow {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--color-brand-dark);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.trial-cta-copy {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-brand-dark);
  line-height: 1.7;
  margin: 0;
}

.trial-cta-btn {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.95rem 2.8rem;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  border-radius: 2px;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity 0.3s;
}

.trial-cta-btn:hover {
  opacity: 0.9;
}

.comparison-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-right: 0.5rem;
}

.icon-check {
  color: var(--color-primary);
}

.icon-cross {
  color: #e76f51;
}

.icon-dash {
  color: #ccc;
}

 

.trial-section {
  margin: 4rem 0;
  background: linear-gradient(135deg, rgba(16, 48, 45, 0.96), rgba(23, 64, 60, 0.9));
  border-radius: 28px;
  color: #fff;
  box-shadow: 0 35px 70px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.trial-wrapper {
  padding: 3rem;
}

.trial-header {
  max-width: 640px;
  margin-bottom: 2.25rem;
}

.trial-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.3em;
  color: #b8f3e3;
}

.trial-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.trial-header h3 {
  font-size: 2.2rem;
  margin: 0.75rem 0 0.75rem;
}

.trial-header p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
}

.trial-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.trial-metric {
  padding: 1.2rem 1rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(6px);
}

.metric-value {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
}

.metric-label {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.8);
}

.trial-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.trial-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.75rem;
  border-radius: 20px;
  background: #ffffff;
  color: var(--color-text-body);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12);
}

.trial-item h4 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  color: var(--color-brand-dark);
}

.trial-item p {
  margin: 0;
  color: #4b5563;
  line-height: 1.7;
}

.trial-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: rgba(42, 157, 143, 0.14);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.trial-icon svg {
  width: 28px;
  height: 28px;
}

.trial-note {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.85);
}

.template-warning {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  padding: 1.5rem;
  font-size: 0.9rem;
  color: #555;
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  margin-top: 2rem;
}

.template-warning svg {
  flex-shrink: 0;
  color: var(--color-accent);
  width: 20px;
  height: 20px;
  margin-top: 4px;
}

@keyframes fadeIn {
  from {
      opacity: 0;
      transform: translateY(10px);
  }

  to {
      opacity: 1;
      transform: translateY(0);
  }

}

.comparison-image-wrapper {
  margin: 4rem 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.promo-banner {
  display: block;
  margin: 4rem 0;
  transition: opacity 0.3s;
}

.promo-banner:hover {
  opacity: 0.9;
}

.promo-banner img {
  border: 1px solid var(--color-border);
}

.chat-simulator-wrapper {
  width: 100%;
  max-width: 900px;
  margin: 4rem auto 2.5rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  position: relative;
  gap: 2rem;
}

.chat-container {
  width: 100%;
  max-width: 414px;
  height: 600px;
  background-color: #fff;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(16, 48, 45, 0.15);
}

.chat-simulator-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background-color: #8ab4f8;
  color: #000;
  border-bottom: 1px solid #efefef;
  min-height: 60px;
}

.back-button {
  border: none;
  background: none;
  cursor: pointer;
  padding: 6px;
  display: flex;
  align-items: center;
  margin-right: 8px;
}

.header-left {
  display: flex;
  align-items: center;
}

.header-title {
  font-size: 1rem;
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.header-actions button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: 16px;
  display: inline-flex;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  background: #8ab4f8;
}

.message {
  display: flex;
  margin-bottom: 16px;
  position: relative;
  align-items: flex-end;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.message.visible {
  opacity: 1;
  transform: translateY(0);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background-color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-right: 8px;
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.avatar img {
  width: 70%;
  height: 70%;
  object-fit: contain;
}

.message-content {
  max-width: 70%;
  padding: 10px 14px;
  font-size: 0.94rem;
  line-height: 1.4;
  word-break: break-word;
}

.bot-message .message-content {
  background-color: #fff;
  color: #000;
  border-radius: 20px;
  box-shadow: 0 1px 1px rgba(0,0,0,0.05);
}

.url-text {
  color: #0366d6;
  text-decoration: underline;
  cursor: default;
  font-weight: 500;
  pointer-events: none;
}

.user-message {
  justify-content: flex-end;
  margin-left: 80px;
}

.link-preview-message {
  margin-left: 48px;
}

.user-message .message-content {
  background-color: #6ed96e;
  color: #000;
  border-radius: 20px;
  border-top-right-radius: 0;
}

.message-time {
  font-size: 0.7rem;
  color: #fff;
  display: block;
  margin: 12px 0;
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.message-time.visible {
  opacity: 1;
  transform: translateY(0);
}

.message-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin-right: 6px;
  font-size: 0.7rem;
  color: #fff;
  text-align: right;
  min-width: 40px;
}

.status-text {
  margin-bottom: 2px;
}

.time-text {
  margin-top: 1px;
}

.chat-input-container {
  background-color: #fff;
  border-top: 1px solid #efefef;
  padding: 10px 0;
}

.chat-input {
  display: flex;
  align-items: center;
  padding: 0 12px;
}

.input-actions {
  display: flex;
  align-items: center;
  width: 100%;
}

.left-buttons,
.right-buttons {
  display: flex;
  align-items: center;
}

.action-button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.input-field-container {
  flex: 1;
  margin: 0 10px;
  position: relative;
}

.input-field {
  width: 100%;
  border: 1px solid #eee;
  border-radius: 18px;
  background-color: #f5f5f5;
  padding: 8px 15px;
  font-size: 0.9rem;
  color: #333;
  height: 36px;
  cursor: default;
  user-select: none;
}

.input-field-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.ogp-link-preview {
  width: 80%;
  margin-bottom: 16px;
  border-radius: 20px;
  overflow: hidden;
  border: none;
  background-color: #fff;
  box-shadow: 0 1px 1px rgba(0,0,0,0.05);
  text-decoration: none;
  color: inherit;
  display: block;
  pointer-events: none;
}

.ogp-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  background-color: #f5f5f5;
}

.ogp-content {
  padding: 6px 14px;
  background-color: #fff;
}

.ogp-title {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.ogp-description {
  font-size: 0.75rem;
  color: #757575;
}

.ogp-domain {
  display: none;
}

.data-viz-container {
  margin: 5rem 0;
  padding: 3rem;
  background: #f8fafc;
  border-left: 6px solid var(--color-brand-dark);
}

.data-viz-title {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
  color: var(--color-brand-dark);
}

.bar-chart {
  display: flex;
  width: 100%;
  height: 60px;
  margin-top: 2rem;
}

.bar-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: white;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.bar-ai {
  width: 70%;
  background: var(--color-primary);
}

.bar-human {
  width: 30%;
  background: var(--color-brand-dark);
}

.data-legend {
  display: grid;
  grid-template-columns: 7fr 3fr;
  gap: 2rem;
  margin-top: 2rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.legend-label {
  background: none;
  font-weight: 800;
}

.legend-label-ai {
  color: var(--color-primary);
}

.legend-label-human {
  color: var(--color-brand-dark);
}

.data-viz-note {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #e2e8f0;
}

.data-viz-note-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-brand-dark);
}

.data-viz-note-text {
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  text-align: justify;
}

.data-viz-note-text:last-child {
  margin-bottom: 0;
}

.trial-offer {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  margin: 4rem 0 5rem;
  padding: 3rem 3.2rem;
  border: 1px solid rgba(16, 48, 45, 0.12);
  background: linear-gradient(135deg, rgba(16, 48, 45, 0.06) 0%, rgba(42, 157, 143, 0.1) 100%);
  position: relative;
  overflow: hidden;
}

.trial-offer::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 220px;
  height: 220px;
  background: var(--color-primary);
  opacity: 0.12;
  transform: rotate(18deg);
}

.trial-offer-content {
  position: relative;
  z-index: 1;
}

.trial-offer-eyebrow {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--color-brand-dark);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.trial-offer-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-brand-dark);
  margin: 0 0 1.2rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.trial-offer-copy {
  font-size: 1rem;
  font-weight: 600;
  color: #334155;
  line-height: 1.8;
  margin: 0;
}

.trial-offer-panel {
  position: relative;
  z-index: 1;
  background: #ffffff;
  border: 1px solid rgba(16, 48, 45, 0.12);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.8rem;
  box-shadow: 0 18px 40px -28px rgba(16, 48, 45, 0.4);
}

.trial-offer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
  font-weight: 800;
  color: var(--color-brand-dark);
}

.trial-offer-list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.95rem;
}

.trial-offer-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.trial-offer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-primary) 100%);
  color: #ffffff;
  padding: 1.05rem 1.5rem;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid var(--color-brand-dark);
  box-shadow: 0 18px 30px -22px rgba(16, 48, 45, 0.6);
  transition: transform 0.2s, box-shadow 0.2s;
}

.trial-offer-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 36px -24px rgba(16, 48, 45, 0.7);
}

.summary-block {
  border: 5px solid var(--color-brand-dark);
  padding: 4rem;
  margin: 6rem 0;
  background: #fff;
}

.summary-title {
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  border-bottom: 2px solid var(--color-brand-dark);
  padding-bottom: 1.5rem;
  margin-bottom: 3rem;
  font-weight: 900;
  color: var(--color-brand-dark);
}

.summary-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.summary-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 0.8;
}

.chat-cta {
  text-align: center;
  margin: 2.5rem 0 4rem;
}

.chat-cta .cta-btn {
  margin-top: 0;
}

.cta-section {
  background: var(--color-brand-dark);
  color: white;
  padding: 8rem 4rem;
  margin: 8rem 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  background-image: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand-deep-accent) 100%);
}

.cta-section h3 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: white;
    max-width: 800px;
    line-height: 1.2;
    border-bottom: 2px solid white;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: var(--color-primary);
  opacity: 0.15;
  transform: rotate(45deg);
}

.cta-description {
  opacity: 0.9;
  margin-bottom: 2rem;
  color: #e0f2f1;
  max-width: 800px;
  margin-right: auto;
}

.cta-btn {
  display: inline-block;
  background: var(--color-primary);
  color: white;
  padding: 1.4rem 4rem;
  font-weight: 800;
  margin-top: 4rem;
  font-size: 1.1rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  align-self: center;
  letter-spacing: 0.05em;
  transition: opacity 0.3s;
}

.cta-btn:hover {
  opacity: 0.9;
}

.sidebar {
  padding: 100px 32px 120px;
  background: #fcfcfc;
  border-left: 1px solid var(--color-border);
}

.sidebar nav {
  position: -webkit-sticky;
  position: sticky;
  top: calc(var(--header-height) + 40px);
  padding-bottom: 120px;
}

.toc-label-en {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: #94a3b8;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: block;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 0.8rem;
}

.toc-title {
  display: none;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.toc-list li {
  margin-bottom: 0.75rem;
}

.toc-list li a {
  display: block;
  padding: 0.6rem 0 0.6rem 1.2rem;
  font-size: 0.8rem;
  color: #64748b;
  border-left: 2px solid #e2e8f0;
  transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1);
  font-weight: 500;
  line-height: 1.4;
}

.toc-list li a:hover {
  color: var(--color-brand-dark);
  border-left-color: #cbd5e1;
}

.toc-list li a.active {
  color: #0f172a;
  font-weight: 800;
  border-left: 4px solid var(--color-primary);
  background: linear-gradient(90deg, rgba(42,157,143,0.05), transparent);
  padding-left: 1.5rem;
}

.site-footer {
  background: #fff;
  border-top: 1px solid var(--color-border);
  padding: 80px 0 0;
  margin-top: 0;
}

.footer-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
}

.footer-logo a {
  display: inline-flex;
  align-items: center;
  transition: opacity 0.3s ease;
}

.footer-logo a:hover {
  opacity: 0.8;
}

.footer-logo img {
  height: 32px;
  width: auto;
}

.footer-message {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.8;
  font-weight: 500;
  max-width: 260px;
}

.footer-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-head);
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-link {
  font-size: 13px;
  color: #6b7280;
  font-weight: 500;
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.footer-icon {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.footer-info-text,
.footer-info-link {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.6;
  font-weight: 500;
}

.footer-info-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
}

.footer-copyright {
  font-size: 11px;
  color: #94a3b8;
  letter-spacing: 0.05em;
  text-align: center;
  margin: 0;
}

@media (max-width: 992px) {
  .chat-simulator-wrapper {
      flex-direction: column;
      align-items: center;
  }

  .chat-container {
      max-width: 100%;
      height: 520px;
      max-height: 80vh;
  }

}

@media (max-width: 1024px) {
  .site-header .header-container {
      padding: 0 2rem;
      justify-content: center;
  }

  .site-header nav {
      display: none;
  }

  .header-buttons .login-button,
  .header-buttons .cta-button {
      display: none;
  }

  .mobile-login-text {
      display: inline-block;
      position: absolute;
      left: 24px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 14px;
      font-weight: 700;
  }

  .mobile-menu-toggle {
      display: flex;
      position: absolute;
      right: 24px;
      top: 50%;
      transform: translateY(-50%);
  }

  .content-wrapper {
      grid-template-columns: 1fr;
      gap: 0;
      padding: 0 2rem;
      border: none;
  }

  .article-main {
      border-right: none;
      padding-right: 0;
      padding-top: 60px;
  }

  .sidebar {
      display: none;
  }

}

@media (max-width: 768px) {
  .header-container {
      padding: 0 1.5rem;
  }

  .hero {
      padding: 140px 0 80px;
  }

  .content-wrapper {
      padding: 0 1.5rem;
  }

  .article-main {
      padding: 60px 0;
  }

  .meta-grid {
      flex-wrap: wrap;
      gap: 2rem;
  }

  .insight-box {
      padding: 2.5rem;
      margin-bottom: 4rem;
  }

  .insight-quote {
      font-size: 1.4rem;
  }

  .step-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 0.5rem;
  }

  .step-body {
      padding: 1.5rem;
  }

  .trial-section {
      padding: 2rem;
      margin: 3rem 0;
  }

  .trial-cta {
      flex-direction: column;
      align-items: flex-start;
  }

  .trial-cta-btn {
      width: 100%;
  }

  .trial-wrapper {
      padding: 2rem 1.5rem;
  }

  .trial-metrics {
      grid-template-columns: 1fr;
  }

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

  .trial-item {
      padding: 1.5rem;
  }

  .data-legend {
      grid-template-columns: 1fr;
  }

  .data-viz-container {
      padding: 1rem;
  }

  .trial-offer {
      grid-template-columns: 1fr;
      padding: 2.2rem 1.6rem;
  }

  .trial-offer-title {
      font-size: 1.5rem;
  }

  .trial-offer-panel {
      width: 100%;
  }

  .trial-offer-btn {
      width: 100%;
  }

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

  .summary-block {
      padding: 2.5rem;
  }

  .summary-item {
      grid-template-columns: 1fr;
      gap: 0.5rem;
  }

  .summary-num {
      font-size: 2.5rem;
      margin-bottom: 0.5rem;
  }

  .cta-section {
      padding: 4rem 2rem;
      align-items: center;
      text-align: center;
  }

  .cta-btn {
      width: 100%;
      padding: 1.2rem;
      margin-top: 3rem;
  }

  .cta-heading {
      font-size: 2rem;
  }

  .footer-container {
      padding: 0 1.5rem;
      gap: 40px;
  }

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

  .comparison-table {
      min-width: 800px;
  }

}

@media (max-width: 480px) {
  .logo img {
      width: 130px;
  }

  .hero-title-main {
      font-size: 2.2rem;
  }

  .hero-title-sub {
      font-size: 1.6rem;
  }

  h2 {
      font-size: 1.8rem;
  }

  .footer-container {
      padding: 0 1.25rem;
  }

  .cta-heading {
      font-size: 1.7rem;
  }

  .data-viz-container {
      padding: 1rem;
  }

}

.trial-section.ac-japan-style {
    margin: 6rem 0;
    padding: 0;
    background: #ffffff;
    border: none;
    border-radius: 0;
    box-shadow: 0 0 0 1px #e0e0e0;
    color: #333;
    position: relative;
    overflow: hidden;
}

.trial-section.ac-japan-style::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: var(--color-primary);
    z-index: 10;
}

.ac-j-container {
    max-width: 100%;
    margin: 0 auto;
}

.ac-j-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 4rem 3.5rem;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
}

.ac-j-title-group {
    flex: 1;
}

.ac-j-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    font-family: 'Inter', sans-serif;
}

.ac-j-heading {
    font-size: 2.8rem;
    font-weight: 800;
    color: #111;
    line-height: 1.25;
    margin: 0;
    letter-spacing: -0.03em;
}

.ac-j-desc-group {
    flex: 1;
    max-width: 500px;
    padding-left: 3rem;
    position: relative;
}

.ac-j-desc {
    font-size: 1rem;
    color: #555;
    line-height: 1.8;
    margin: 0 0 1.5rem 0;
    font-weight: 500;
}

.ac-j-action-arrow {
    display: flex;
    align-items: center;
    color: var(--color-primary);
}

.ac-j-action-arrow .arrow-line {
    width: 40px;
    height: 2px;
    background: currentColor;
}

.ac-j-action-arrow .arrow-head {
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(45deg);
    margin-left: -2px;
}

.ac-j-grid-system {
    display: flex;
    flex-direction: column;
}

.ac-j-metrics-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid #e0e0e0;
}

.ac-j-metric-item {
    padding: 2.5rem 3.5rem;
    border-right: 1px solid #e0e0e0;
    background: #fcfcfc;
    transition: background 0.3s ease;
}

.ac-j-metric-item:last-child {
    border-right: none;
}

.ac-j-metric-item:hover {
    background: #ffffff;
}

.ac-j-metric-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: #999;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.ac-j-metric-value-group {
    display: flex;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.ac-j-metric-val {
    font-size: 3.2rem;
    font-weight: 800;
    color: #111;
    line-height: 1;
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.04em;
}

.ac-j-metric-unit {
    font-size: 1.2rem;
    font-weight: 700;
    margin-left: 5px;
}

.ac-j-metric-sub {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    display: block;
}

.ac-j-features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.ac-j-feature-cell {
    padding: 3rem 3.5rem;
    border-right: 1px solid #e0e0e0;
    border-bottom: 1px solid #e0e0e0;
    background: #fff;
    transition: all 0.3s ease;
}

.ac-j-feature-cell:nth-child(2n) {
    border-right: none;
}

.ac-j-feature-cell:nth-last-child(-n+2) {
    border-bottom: none;
}

.ac-j-feature-cell:hover {
    background: #f9f9f9;
}

.ac-j-feature-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: #111;
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.ac-j-icon {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    border: 1px solid var(--color-primary);
    padding: 2px 8px;
    border-radius: 2px;
}

.ac-j-feature-desc {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

.ac-j-footer {
    padding: 1.5rem 3.5rem;
    background: #111;
    color: #fff;
    font-size: 0.85rem;
}

.ac-j-footer p {
    margin: 0;
    opacity: 0.9;
}

@media (max-width: 992px) {
    .ac-j-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 3rem 2rem;
    }
    .ac-j-title-group {
        margin-bottom: 2rem;
    }
    .ac-j-desc-group {
        padding-left: 0;
        max-width: 100%;
    }
    .ac-j-heading {
        font-size: 2.2rem;
    }
    .ac-j-metric-item,
    .ac-j-feature-cell {
        padding: 2rem;
    }
    .ac-j-metric-val {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .trial-section.ac-japan-style {
        border-radius: 0;
    }
    .ac-j-metrics-row {
        grid-template-columns: 1fr;
    }
    .ac-j-metric-item {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 1.5rem 2rem;
    }
    .ac-j-metric-value-group {
        margin-bottom: 0;
    }
    .ac-j-metric-val {
        font-size: 1.8rem;
    }
    .ac-j-features-grid {
        grid-template-columns: 1fr;
    }
    .ac-j-feature-cell {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }
    .ac-j-footer {
        padding: 1.5rem 2rem;
    }
}
.mechanism-comparison-section {
    margin: 8rem 0;
}

.ac-section-title {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 4rem;
    color: #0f172a;
    border-left: 6px solid var(--color-primary);
    padding-left: 1.5rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.mechanism-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    align-items: stretch;
}

.mech-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: none;
    border-radius: 2px;
    overflow: hidden;
}

.mech-card.highlight {
    border: 1px solid var(--color-primary);
    box-shadow: 0 18px 32px -18px rgba(42, 157, 143, 0.2);
    z-index: 10;
    background: #ffffff;
}

.mech-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-primary);
    color: white;
    font-size: 0.65rem;
    font-weight: 800;
    padding: 6px 12px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.mech-header {
    padding: 2.5rem 1.5rem 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-bottom: 1px solid #f1f5f9;
}

.provider-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.65rem;
    font-weight: 800;
    padding: 6px 10px;
    border-radius: 2px;
    margin-bottom: 1rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.provider-badge.line {
    background: #f8fafc;
    color: #64748b;
    border: 1px solid #e2e8f0;
}

.provider-badge.external {
    background: var(--color-brand-dark);
    color: #ffffff;
    border: 1px solid var(--color-brand-dark);
}

.mech-type {
    font-size: 0.65rem;
    color: #94a3b8;
    font-weight: 800;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}

.mech-title {
    font-size: 1.3rem;
    font-weight: 900;
    color: #0f172a;
    margin: 0 0 1.2rem 0;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.mech-cost {
    font-size: 0.95rem;
    font-weight: 700;
    color: #334155;
    background: #ffffff;
    padding: 0.6rem 1.5rem;
    border-radius: 2px;
    border: 1px solid #cbd5e1;
    letter-spacing: 0.05em;
    min-width: 160px;
}

.mech-card.highlight .mech-cost {
    background: rgba(42, 157, 143, 0.08);
    color: var(--color-primary-dark);
    border-color: var(--color-primary);
}

.mech-visual {
    padding: 3rem 0.5rem;
    background: #fcfcfc;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 260px;
    border-bottom: 1px solid #f1f5f9;
}

.mech-card.highlight .mech-visual {
    background: #ffffff;
}

.mech-flow {
    display: grid;
    grid-template-columns: 1fr 32px 1fr;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 220px;
    margin: 0 auto;
}

.mech-flow-diagram {
    display: grid;
    grid-template-columns: 1fr 18px 1.4fr 18px 1fr;
    align-items: center;
    gap: 4px;
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.step-label {
    font-size: 0.6rem;
    color: #64748b;
    margin-bottom: 8px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.step-icon {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0 4px;
    height: 40px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 2px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.03);
    white-space: nowrap;
}

.step-icon.text-icon {
    font-family: 'Inter', 'Roboto Mono', monospace;
    background: #f8fafc;
    color: #475569;
}

.step-icon.success {
    background: var(--color-brand-dark);
    color: white;
    border-color: var(--color-brand-dark);
}

.step-icon.fail {
    background: #f1f5f9;
    color: #94a3b8;
    border-color: #e2e8f0;
}

.flow-arrow,
.diagram-arrow {
    display: flex;
    justify-content: center;
    align-items: center;
    color: #94a3b8;
    position: relative;
}

.flow-arrow svg,
.diagram-arrow svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}

.arrow-condition {
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.55rem;
    color: #e76f51;
    white-space: nowrap;
    font-weight: 800;
    background: rgba(255,255,255,0.8);
    padding: 2px 4px;
}

.mech-flow.fail-case {
    margin-top: 2rem;
    opacity: 0.4;
    filter: grayscale(100%);
}

.diagram-node {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    padding: 0 4px;
    border-radius: 2px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #475569;
    box-shadow: 0 2px 4px rgba(0,0,0,0.03);
    text-align: center;
    width: 100%;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
    white-space: nowrap;
}

.diagram-node.box {
    background: #f8fafc;
    color: #64748b;
    font-family: 'Inter', 'Roboto Mono', monospace;
}

.diagram-node.brain {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
    background: rgba(42, 157, 143, 0.05);
    display: flex;
    flex-direction: row;
    gap: 4px;
    font-size: 0.6rem;
}

.diagram-arrow {
    font-size: 0.55rem;
    color: #94a3b8;
    white-space: nowrap;
    font-weight: 700;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2px;
}

.diagram-arrow::after {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background: #cbd5e1;
}

.mech-center-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2rem;
    color: #64748b;
}

.mech-center-icon svg {
    width: 32px;
    height: 32px;
    margin-bottom: 0.8rem;
    stroke-width: 1.5;
}

.mech-center-icon.highlight-icon {
    color: var(--color-primary);
}

.icon-label {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.mech-desc {
    padding: 2rem 2.5rem;
    font-size: 0.85rem;
    color: #334155;
    line-height: 1.8;
    text-align: left;
    flex-grow: 1;
    background: #ffffff;
}

@media (max-width: 1200px) {
    .mechanism-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
        gap: 3rem;
    }

    .mech-card.highlight {
        margin: 0;
        transform: none;
    }
}