/* ===========================================
   PAGEONE AI Solutions LP - Redesign
   =========================================== */

/* --- Variables --- */
:root {
  --font-ja: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;

  --color-vitamin: #FF9900;
  --color-vitamin-dark: #E07A00;
  --color-vitamin-bg: #FFF8EE;
  --color-intellectra: #f26524;
  --color-intellectra-dark: #d1473a;
  --color-intellectra-bg: #FFF5F0;
  --color-lt-ai: #27689e;
  --color-lt-ai-dark: #1d5280;
  --color-lt-ai-bg: #F0F6FB;
  --color-agent: #9b51e0;

  --gray-50: #faf8f6;
  --gray-100: #f3f1ee;
  --gray-200: #e8e4df;
  --gray-300: #d4cfc9;
  --gray-400: #a09892;
  --gray-500: #736b64;
  --gray-600: #564e47;
  --gray-700: #3d3630;
  --gray-800: #2a2420;
  --gray-900: #1a1512;

  --max-w: 1120px;
  --header-h: 64px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; touch-action: manipulation; overflow-x: hidden; }
body {
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-800);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* 別タブで開くリンクに外部リンクアイコンを付与 */
/* テキストリンク（グレーアイコン） */
a[target="_blank"]:not([class*="btn"])::before {
  content: '';
  display: inline-block;
  width: 11px;
  height: 11px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a09892' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 01-2 2H5a2 2 0 01-2-2V8a2 2 0 012-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  margin-right: 4px;
  vertical-align: -1px;
  flex-shrink: 0;
}
/* ボタン（白アイコン） */
.btn[target="_blank"]::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-opacity='0.85' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 01-2 2H5a2 2 0 01-2-2V8a2 2 0 012-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  flex-shrink: 0;
}
.pc-only { display: none; }
@media (min-width: 768px) { .pc-only { display: inline; } }

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-ja);
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}
.btn:hover { opacity: 0.85; }

.btn--primary {
  background: var(--gray-900);
  color: #fff;
}
.btn--secondary {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}
.btn--secondary:hover { background: var(--gray-50); }

.btn--vitamin { background: var(--color-vitamin); color: #fff; }
.btn--intellectra { background: var(--color-intellectra); color: #fff; }
.btn--lt-ai { background: var(--color-lt-ai); color: #fff; }

.btn--outline {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}
.btn--outline:hover { background: var(--gray-50); }

.btn--outline-dark {
  background: transparent;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}
.btn--outline-dark:hover { background: var(--gray-100); }

/* ================================
   Header
   ================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: transparent;
  transition: background 0.3s, box-shadow 0.3s;
}
.header.is-scrolled {
  background: rgba(255, 252, 250, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--gray-200);
}
.header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header__logo-img { height: 30px; width: auto; }
.header__logo-divider {
  width: 1px;
  height: 22px;
  background: var(--gray-300);
}
.header__logo-sub {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--gray-500);
}
.header__menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}
.header__menu-btn span {
  width: 100%;
  height: 2px;
  background: var(--gray-800);
  transition: 0.3s;
}
.header__menu-btn.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__menu-btn.is-active span:nth-child(2) { opacity: 0; }
.header__menu-btn.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header__menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s, visibility 0.3s;
}
.header__menu.is-open {
  background: rgba(250, 249, 247, 0.82);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  backdrop-filter: blur(24px) saturate(180%);
  border-top: 1px solid rgba(255, 255, 255, 0.6);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.header__menu a {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-800);
}

/* 戻るボタン */
.header__menu-close-item {
  position: absolute;
  top: 16px;
  right: 16px;
  list-style: none;
}
.header__menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 50%;
  color: var(--gray-700);
  cursor: pointer;
}
@media (min-width: 1024px) {
  .header__menu-close-item { display: none; }
}

.header__cta-btn {
  padding: 10px 24px;
  background: var(--gray-900) !important;
  color: #fff !important;
  border-radius: 6px;
  font-size: 14px !important;
}

@media (min-width: 1024px) {
  .header__menu-btn { display: none; }
  /* メニューは header 外に配置されているため、PC では fixed でヘッダー領域に重ねる */
  .header__menu {
    position: fixed;
    top: 0;
    right: max(0px, calc((100vw - var(--max-w)) / 2));
    left: auto;
    bottom: auto;
    height: var(--header-h);
    width: auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 32px;
    padding: 0 24px;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-top: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .header__menu a {
    font-size: 14px;
    color: var(--gray-600);
  }
  .header__menu a:hover { color: var(--gray-900); }
  .header.is-scrolled .header__cta-btn {
    background: var(--gray-900) !important;
    color: #fff !important;
  }
}

/* ================================
   Hero
   ================================ */
.hero {
  background: linear-gradient(145deg, #eef6f2 0%, #fffefa 55%, #f0f9f5 100%);
  color: var(--gray-900);
  padding-top: var(--header-h);
  border-bottom: 1px solid var(--gray-200);
}
.hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 24px 60px;
  display: grid;
  gap: 48px;
}
@media (min-width: 960px) {
  .hero__inner {
    grid-template-columns: 1fr 1.1fr;
    align-items: center;
    padding: 100px 24px 80px;
    gap: 48px;
  }
}

/* Hero text */
.hero__text { text-align: center; }
@media (min-width: 960px) { .hero__text { text-align: left; } }

.hero__label {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 20px;
}
.hero__title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--gray-900);
  margin-bottom: 20px;
}
.hero__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--gray-500);
  margin-bottom: 32px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
@media (min-width: 960px) {
  .hero__actions { justify-content: flex-start; }
}

/* Hero visual - carousel */
.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 3D カルーセルコンテナ */
.hero-carousel {
  width: 100%;
  max-width: 340px;
  height: 380px;
  margin: 0 auto;
  position: relative;
}
.hero__disclaimer {
  width: 100%;
  margin-top: 4px;
  font-size: 9px;
  color: #8c8078;
  line-height: 1.6;
}
@media (min-width: 960px) {
  .hero-carousel {
    max-width: 400px;
    height: 420px;
  }
}

.hero-carousel__track {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.45, 0.05, 0.55, 0.95);
  will-change: transform;
}

/* チャットカード共通 */
.hero-chat {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: transform;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 8px 32px rgba(26,21,18,0.10);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* カード配置: JSで動的に計算 */

/* チャットヘッダー */
.hero-chat__header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 2px solid var(--gray-200);
  background: var(--gray-50);
  flex-shrink: 0;
}
.hero-chat--vitamin .hero-chat__header {
  border-bottom-color: var(--color-vitamin);
}
.hero-chat--intellectra .hero-chat__header {
  border-bottom-color: var(--color-intellectra);
}
.hero-chat--lt-ai .hero-chat__header {
  border-bottom-color: var(--color-lt-ai);
}

.hero-chat__logo {
  height: 18px;
  width: auto;
}
.hero-chat__logo-text {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 800;
  color: var(--color-lt-ai);
  letter-spacing: -0.02em;
}

.hero-chat__tag {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
}
.hero-chat__tag--vitamin {
  background: var(--color-vitamin-bg);
  color: var(--color-vitamin-dark);
}
.hero-chat__tag--intellectra {
  background: var(--color-intellectra-bg);
  color: var(--color-intellectra-dark);
}
.hero-chat__tag--lt-ai {
  background: var(--color-lt-ai-bg);
  color: var(--color-lt-ai-dark);
}

/* チャットボディ */
.hero-chat__body {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
}

/* メッセージ共通 */
.hero-chat__msg {
  max-width: 90%;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 12px;
  line-height: 1.5;
}
.hero-chat__msg--user {
  align-self: flex-end;
  color: #fff;
  flex-shrink: 0;
}
.hero-chat__msg--user-vitamin { background: var(--color-vitamin); }
.hero-chat__msg--user-intellectra { background: var(--color-intellectra); }
.hero-chat__msg--user-lt-ai { background: var(--color-lt-ai); }

/* AI応答エリア */
.hero-chat__msg--ai {
  align-self: flex-start;
  background: var(--gray-100);
  color: var(--gray-700);
  flex: 1;
  max-width: 100%;
  overflow: hidden;
  position: relative;
}

/* ローディング状態 - 絶対配置でオーバーレイ表示 */
.hero-chat__loading {
  position: absolute;
  top: 8px;
  left: 10px;
  right: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.hero-chat__loading.is-visible {
  opacity: 1;
  pointer-events: auto;
}
.hero-chat__typing {
  display: inline-flex;
  gap: 3px;
}
.hero-chat__typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-400);
  animation: typingBounce 1.2s ease-in-out infinite;
}
.hero-chat__typing span:nth-child(2) { animation-delay: 0.15s; }
.hero-chat__typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}
.hero-chat__loading-text {
  font-size: 11px;
  color: var(--gray-400);
}

/* Generated Answer セクション - 常に空間確保・opacity制御 */
.hero-chat__generated {
  opacity: 0;
  pointer-events: none;
}
.hero-chat__generated.is-visible {
  opacity: 1;
  pointer-events: auto;
  animation: fadeSlideIn 0.4s ease-out;
}
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Generated Answer ヘッダー */
.hero-chat__gen-header {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--gray-200);
}
.hero-chat__gen-header svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}
.hero-chat__gen-header--vitamin { color: var(--color-vitamin-dark); }
.hero-chat__gen-header--intellectra { color: var(--color-intellectra-dark); }
.hero-chat__gen-header--lt-ai { color: var(--color-lt-ai-dark); }

/* 回答テキスト */
.hero-chat__answer-text {
  font-size: 11px;
  line-height: 1.6;
  color: var(--gray-700);
  margin: 0;
}
.hero-chat__answer-text strong {
  font-weight: 700;
  color: var(--gray-900);
}

/* 出典バッジ - 常に空間確保・opacity制御 */
.hero-chat__cite-badges {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  font-size: 10px;
  color: var(--gray-500);
  opacity: 0;
  pointer-events: none;
}
.hero-chat__cite-badges.is-visible {
  opacity: 1;
  pointer-events: auto;
  animation: fadeSlideIn 0.3s ease-out;
}
.hero-chat__cite {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  color: #fff;
}
.hero-chat__cite--vitamin { background: var(--color-vitamin); }
.hero-chat__cite--intellectra { background: var(--color-intellectra); }
.hero-chat__cite--lt-ai { background: var(--color-lt-ai); }

/* 引用リンク - 常に空間確保・opacity制御 */
.hero-chat__refs {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--gray-200);
  opacity: 0;
  pointer-events: none;
}
.hero-chat__refs.is-visible {
  opacity: 1;
  pointer-events: auto;
  animation: fadeSlideIn 0.3s ease-out;
}
.hero-chat__ref-link {
  display: block;
  font-size: 10px;
  padding: 3px 6px;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}
.hero-chat__ref-link--vitamin {
  background: var(--color-vitamin-bg);
  color: var(--color-vitamin-dark);
}
.hero-chat__ref-link--intellectra {
  background: var(--color-intellectra-bg);
  color: var(--color-intellectra-dark);
}
.hero-chat__ref-link--lt-ai {
  background: var(--color-lt-ai-bg);
  color: var(--color-lt-ai-dark);
}

/* 免責事項 - 常に空間確保・opacity制御 */
.hero-chat__disclaimer {
  display: block;
  font-size: 9px;
  color: var(--gray-400);
  text-align: center;
  margin-top: 6px;
  padding-top: 4px;
  border-top: 1px solid var(--gray-200);
  opacity: 0;
  pointer-events: none;
}
.hero-chat__disclaimer.is-visible {
  opacity: 1;
  pointer-events: auto;
  animation: fadeSlideIn 0.3s ease-out;
}

/* LT-AI ヒーローカード（実UI風） */
.hero-chat--lt-ai-ui .hero-chat__header,
.hero-chat--lt-ai-ui .hero-chat__body {
  display: none;
}
.hero-chat--lt-ai-ui {
  display: flex;
  flex-direction: column;
}

/* ヘッダー */
.hero-ltai__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: #d8f0f8;
  color: #1a3654;
  flex-shrink: 0;
}
.hero-ltai__logo {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 800;
  color: #1a3654;
}
.hero-ltai__lecture {
  font-size: 12px;
  font-weight: 600;
}

/* ボディ */
.hero-ltai__body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* サイドバー */
.hero-ltai__sidebar {
  width: 120px;
  flex-shrink: 0;
  background: #f5f5f5;
  border-right: 1px solid var(--gray-200);
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  overflow: hidden;
}
.hero-ltai__sidebar-btn {
  font-size: 8px;
  font-weight: 600;
  color: #fff;
  background: #1a3654;
  padding: 4px 6px;
  border-radius: 0;
  text-align: center;
}
.hero-ltai__sidebar-new {
  font-size: 8px;
  font-weight: 600;
  color: #fff;
  background: #2563eb;
  padding: 5px 6px;
  border-radius: 3px;
  text-align: center;
}
.hero-ltai__sidebar-label {
  font-size: 8px;
  font-weight: 700;
  color: #5b9bd5;
  text-align: center;
  margin-top: 2px;
}
.hero-ltai__sidebar-item {
  font-size: 8px;
  color: var(--gray-700);
  padding: 4px 6px;
  border-bottom: 1px solid var(--gray-200);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero-ltai__sidebar-item--active {
  background: #e8f0f8;
  font-weight: 600;
}

/* メインエリア */
.hero-ltai__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.hero-ltai__topic {
  font-size: 10px;
  font-weight: 700;
  color: var(--gray-800);
  padding: 6px 10px;
  border-bottom: 1px solid var(--gray-100);
  background: var(--gray-50);
}

/* メッセージ */
.hero-ltai__msgs {
  flex: 1;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}
.hero-ltai__msg {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 9px;
  line-height: 1.5;
}
.hero-ltai__msg--user {
  flex-direction: row;
}
.hero-ltai__msg--user span {
  color: var(--gray-800);
  font-size: 9px;
  font-weight: 600;
}
.hero-ltai__msg--user .hero-ltai__avatar {
  display: none;
}

/* アバター */
.hero-ltai__avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-ltai__avatar svg {
  width: 12px;
  height: 12px;
}
.hero-ltai__avatar--user {
  background: rgba(255,255,255,0.2);
  color: #fff;
}
.hero-ltai__avatar--ai {
  background: var(--gray-200);
  color: var(--gray-600);
}

/* LT-AI ローディング */
.hero-ltai__loading {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  flex: 1;
  min-width: 0;
}
.hero-ltai__loading.is-visible {
  display: flex;
}

/* AI応答 */
.hero-ltai__ai-content {
  display: none;
  flex: 1;
  min-width: 0;
}
.hero-ltai__ai-content.is-visible {
  display: block;
  animation: fadeSlideIn 0.4s ease-out;
}
.hero-ltai__ai-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 4px;
}
.hero-ltai__ai-text {
  font-size: 9px;
  line-height: 1.6;
  color: var(--gray-700);
  margin-bottom: 4px;
}
.hero-ltai__code-block {
  display: none;
  background: #1e293b;
  color: #e2e8f0;
  border-radius: 4px;
  padding: 6px 8px;
  overflow-x: auto;
}
.hero-ltai__code-block.is-visible {
  display: block;
  animation: fadeSlideIn 0.3s ease-out;
}
.hero-ltai__code-block pre {
  font-family: 'Courier New', monospace;
  font-size: 8px;
  line-height: 1.3;
  margin: 0;
  white-space: pre;
}

/* 入力 */
.hero-ltai__input {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-top: 1px solid var(--gray-200);
}
.hero-ltai__input span {
  flex: 1;
  font-size: 9px;
  color: var(--gray-400);
  padding: 4px 8px;
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  background: #fff;
}
.hero-ltai__input svg {
  width: 14px;
  height: 14px;
  color: var(--gray-400);
}

/* Trust bar */
.hero__trust {
  border-top: 1px solid var(--gray-200);
  background: #f5f3f1;
}
.hero__trust-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 40px;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-600);
  text-decoration: none;
  transition: color 0.2s;
}
a.trust-item:hover {
  color: var(--gray-700);
}
.trust-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--gray-400);
}

/* ================================
   Section Header
   ================================ */
.sec-header { margin-bottom: 64px; }
.sec-header--center { text-align: center; }
.sec-header__label {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gray-600);
  margin-bottom: 8px;
}
.sec-header__label--light { color: rgba(255,255,255,0.4); }
.sec-header__title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -0.01em;
}
.sec-header__desc {
  font-size: 15px;
  color: var(--gray-500);
  margin-top: 8px;
}

/* ================================
   Services Overview
   ================================ */
.services {
  padding: 100px 0 80px;
  background: #ffffff;
}
.services__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.services__grid {
  display: grid;
  gap: 24px;
}
@media (min-width: 768px) {
  .services__grid { grid-template-columns: repeat(3, 1fr); }
}
.service-card {
  display: block;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.service-card:hover {
  border-color: var(--gray-300);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.service-card__color { height: 4px; }
.service-card--vitamin .service-card__color { background: var(--color-vitamin); }
.service-card--intellectra .service-card__color { background: var(--color-intellectra); }
.service-card--lt-ai .service-card__color { background: var(--color-lt-ai); }

.service-card__body { padding: 36px 28px; }
.service-card__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  margin-bottom: 8px;
}
.service-card__logo {
  height: 24px;
  width: auto;
  margin-bottom: 0;
}
/* vitamin / intellectra を LT-AI テキスト高さに合わせて統一 */
.service-card__logo--vitamin { height: 36px; }
.service-card__logo--intellectra { height: 36px; }
.service-card__logo--lt-ai { height: 18px; }
.service-card__name-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  margin-bottom: 8px;
}

.service-card__name {
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  color: var(--gray-900);
  margin: 0;
}
.service-card__desc {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}
.service-card__features {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.service-card__feature {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 12px;
  color: var(--gray-600);
  line-height: 1.5;
}
.service-card__feature::before {
  content: '✓';
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.service-card--vitamin .service-card__feature::before { color: var(--color-vitamin); }
.service-card--intellectra .service-card__feature::before { color: var(--color-intellectra); }
.service-card--lt-ai .service-card__feature::before { color: var(--color-lt-ai); }

.service-card__audience {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--gray-200);
}
.service-card__audience-label {
  font-size: 11px;
  color: var(--gray-400);
  font-weight: 500;
}
.service-card__audience-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 100px;
  background: var(--gray-100);
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
}

/* ================================
   Product Sections
   ================================ */
.product {
  padding: 100px 0;
}
.product--vitamin {
  /* 白（Services下端）から淡い琥珀色へ、下端はIntelletra開始色へ */
  background: linear-gradient(to bottom, #ffffff 0%, #fdfaf3 72px, #fdfaf3 calc(100% - 72px), #f9f6f0 100%);
}
.product--intellectra {
  /* Vitamin末端色からミントへ、下端はLT-AI白へ */
  background: linear-gradient(to bottom, #f9f6f0 0%, #eef6f2 72px, #eef6f2 calc(100% - 72px), #e8f3ee 100%);
}
.product--lt-ai-section {
  /* Intellectra末端からクリームへ */
  background: linear-gradient(to bottom, #e8f3ee 0%, #fafafa 72px, #fafafa 100%);
}

.product__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Main: image + text */
.product__main {
  display: grid;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}
@media (min-width: 768px) {
  .product__main {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }
  .product__main--reverse { direction: rtl; }
  .product__main--reverse > * { direction: ltr; }
}

.product__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 12px;
}
.product__tag--vitamin { background: var(--color-vitamin-bg); color: var(--color-vitamin-dark); }
.product__tag--intellectra { background: var(--color-intellectra-bg); color: var(--color-intellectra-dark); }
.product__tag--lt-ai { background: var(--color-lt-ai-bg); color: var(--color-lt-ai-dark); }

.product__audience {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  margin-bottom: 20px;
}
.product__audience-label {
  font-size: 12px;
  color: var(--gray-500);
  font-weight: 500;
  white-space: nowrap;
}
.product__audience-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--gray-100);
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}

.product__logo {
  height: 36px;
  width: auto;
  margin-bottom: 0;
}
/* vitamin / intellectra を同じ高さに統一 */
.product__logo--vitamin { height: 40px; }
.product__logo--intellectra { height: 40px; }
.product__logo--lt-ai { height: 24px; }
@media (min-width: 768px) {
  .product__logo { height: 44px; }
  .product__logo--vitamin { height: 52px; }
  .product__logo--intellectra { height: 52px; }
  .product__logo--lt-ai { height: 30px; }
}
.product__name {
  font-family: var(--font-en);
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0;
}
.product__name--vitamin { color: var(--color-vitamin); }
.product__name--intellectra { color: var(--color-intellectra); }
.product__name--lt-ai { color: var(--color-lt-ai); }
/* ロゴ / 製品名 + 読み方を横並びにする行 */
.product__name-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.product__reading {
  font-size: 13px;
  font-weight: 400;
  font-family: var(--font-ja);
  color: var(--gray-400);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.product__catch {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 16px;
}
.product__desc {
  font-size: 15px;
  line-height: 2;
  color: var(--gray-500);
  margin-bottom: 28px;
}
.product__actions-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.product__actions-row .product__audience {
  margin-top: 0;
  margin-bottom: 0;
}
.product__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Visual */
.product__visual {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0,0,0,0.14);
  border: 1px solid var(--gray-200);
}
.product__visual img {
  width: 100%;
  display: block;
}
.product__visual--mock {
  box-shadow: none;
  border: none;
  background: var(--gray-100);
  padding: 24px;
  border-radius: 16px;
}
.product__visual-note {
  font-size: 11px;
  color: var(--gray-400);
  text-align: center;
  margin-top: 8px;
}

/* Features (3-column) */
.product__features {
  display: grid;
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
}
@media (min-width: 768px) {
  .product__features { grid-template-columns: repeat(3, 1fr); }
}
.feature {
  padding: 40px 32px;
  background: #fffcfa;
}
.product--intellectra .feature { background: #fdfdfd; }

.feature__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.feature__text {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ================================
   Feature Illustrations (fi-*)
   ================================ */
.feature__illust {
  height: 128px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 12px 14px;
  overflow: hidden;
}

/* ---- Feature 1: ミニチャット ---- */
.fi-chat { width: 100%; display: flex; flex-direction: column; gap: 8px; }
.fi-chat__row { display: flex; align-items: flex-end; gap: 6px; }
.fi-chat__row--user { justify-content: flex-end; }
.fi-chat__row--ai   { justify-content: flex-start; align-items: flex-start; }
.fi-avatar {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--gray-300); flex-shrink: 0;
}
.fi-chat__badge {
  font-size: 8px; font-weight: 700;
  color: var(--color-vitamin); background: rgba(255,153,0,0.15);
  padding: 2px 5px; border-radius: 3px;
  flex-shrink: 0; margin-top: 3px;
}
.fi-chat__bubble {
  font-size: 10px; line-height: 1.5;
  padding: 5px 9px; border-radius: 10px; max-width: 80%;
}
.fi-chat__bubble--user {
  background: var(--gray-100); color: var(--gray-700);
  border-bottom-right-radius: 2px;
}
.fi-chat__bubble--ai {
  background: var(--color-vitamin); color: #fff;
  border-bottom-left-radius: 2px;
  display: flex; flex-direction: column; gap: 4px;
}
.fi-chat__ref {
  font-size: 9px; font-weight: 700;
  background: rgba(255,255,255,0.22); padding: 2px 6px; border-radius: 4px;
  display: flex; align-items: center; gap: 3px;
}
.fi-chat__ref::before {
  content: '';
  display: inline-block; width: 7px; height: 9px;
  background: rgba(255,255,255,0.85); border-radius: 1px; flex-shrink: 0;
}
.fi-chat__answer { font-size: 9px; line-height: 1.4; opacity: 0.95; }

/* ---- Feature 2: 文書 → かみ砕き変換 ---- */
.fi-transform { width: 100%; display: flex; align-items: center; gap: 7px; }

.fi-transform__before {
  flex: 1; overflow: hidden;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: 6px; padding: 7px 8px;
}
.fi-doc-label {
  font-size: 7px; font-weight: 700; letter-spacing: 0.04em;
  color: var(--gray-400); margin-bottom: 5px; text-transform: uppercase;
}
.fi-doc-body { display: flex; flex-direction: column; gap: 2px; }
.fi-doc-line {
  display: block; font-size: 7.5px; color: var(--gray-500);
  line-height: 1.4; white-space: nowrap; overflow: hidden;
}

.fi-transform__mid {
  display: flex; flex-direction: column; align-items: center;
  gap: 3px; flex-shrink: 0;
}
.fi-transform__ai-badge {
  font-size: 8px; font-weight: 700; color: #fff;
  background: var(--color-vitamin); padding: 1px 5px; border-radius: 3px;
}
.fi-transform__arrow-icon { font-size: 16px; color: var(--gray-400); font-weight: 700; }

.fi-transform__after { flex: 1; }
.fi-speech {
  background: #fff9f4; border: 1.5px solid var(--color-vitamin);
  border-radius: 8px; padding: 8px 10px; position: relative;
}
.fi-speech::before {
  content: ''; position: absolute;
  left: -8px; top: 50%; transform: translateY(-50%);
  border: 4px solid transparent; border-right-color: var(--color-vitamin);
}
.fi-speech::after {
  content: ''; position: absolute;
  left: -5px; top: 50%; transform: translateY(-50%);
  border: 3px solid transparent; border-right-color: #fff9f4;
}
.fi-speech__label {
  font-size: 7px; font-weight: 700; color: var(--color-vitamin);
  margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.04em;
}
.fi-speech__text { font-size: 9px; color: var(--gray-700); line-height: 1.5; }

/* ---- Feature 3: 人物 → Vitamin AI ---- */
.fi-onboard { width: 100%; display: flex; align-items: center; gap: 8px; }
.fi-onboard__left {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; flex-shrink: 0;
}
.fi-think {
  background: white; border: 1px solid var(--gray-300);
  border-radius: 6px; padding: 3px 6px;
  font-size: 8px; line-height: 1.4; color: var(--gray-600);
  text-align: center; position: relative; margin-bottom: 4px;
}
.fi-think::after {
  content: ''; position: absolute;
  bottom: -6px; left: 50%; transform: translateX(-50%);
  border: 3px solid transparent; border-top-color: var(--gray-300);
}
.fi-person { width: 26px; height: 35px; color: var(--gray-500); }
.fi-onboard__label { font-size: 7px; color: var(--gray-500); white-space: nowrap; }
.fi-onboard__arrow { font-size: 18px; font-weight: 700; color: var(--color-vitamin); flex-shrink: 0; }

.fi-app {
  flex: 1; background: white;
  border: 1px solid var(--gray-200); border-radius: 8px;
  overflow: hidden; box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.fi-app__header {
  background: var(--color-vitamin); padding: 4px 8px;
  display: flex; align-items: center; gap: 4px;
}
.fi-app__dot { width: 5px; height: 5px; border-radius: 50%; background: rgba(255,255,255,0.65); flex-shrink: 0; }
.fi-app__name { font-size: 8px; font-weight: 700; color: #fff; }
.fi-app__body { padding: 7px 8px; display: flex; flex-direction: column; gap: 5px; }
.fi-app__query {
  font-size: 8px; color: var(--gray-600);
  background: var(--gray-100); padding: 3px 6px; border-radius: 4px;
}
.fi-app__result {
  font-size: 8px; font-weight: 600; color: var(--color-vitamin);
  display: flex; align-items: center; gap: 4px;
}
.fi-app__doc-icon {
  display: inline-block; width: 8px; height: 10px; flex-shrink: 0;
  background: var(--color-vitamin); border-radius: 1px; opacity: 0.7;
}

/* ---- Intellectra Feature Illustrations (fi-it-*) ---- */
.fi-it-badge {
  font-size: 8px; font-weight: 700; color: #fff;
  background: var(--color-intellectra); padding: 1px 5px; border-radius: 3px;
}
.fi-it-arrow { font-size: 16px; color: var(--gray-400); font-weight: 700; }
.fi-it-mid {
  display: flex; flex-direction: column; align-items: center;
  gap: 3px; flex-shrink: 0;
}

/* Feature 1: PDF → Q&A */
.fi-upload { width: 100%; display: flex; align-items: center; gap: 8px; }
.fi-pdf {
  flex-shrink: 0; display: flex; flex-direction: column; align-items: center; gap: 4px;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: 6px; padding: 8px 10px;
}
.fi-pdf__icon {
  width: 28px; height: 34px; background: #fff;
  border: 1.5px solid var(--color-intellectra); border-radius: 3px;
  padding: 5px 4px; display: flex; flex-direction: column; gap: 3px;
}
.fi-pdf__line { height: 2px; background: var(--gray-300); border-radius: 1px; }
.fi-pdf__line--short { width: 60%; }
.fi-pdf__label { font-size: 7px; color: var(--gray-500); white-space: nowrap; }
.fi-it-qa { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.fi-it-qa__q {
  font-size: 9px; background: var(--gray-100); color: var(--gray-700);
  padding: 4px 8px; border-radius: 8px; border-bottom-right-radius: 2px;
  align-self: flex-end;
}
.fi-it-qa__a {
  font-size: 8.5px; line-height: 1.4;
  background: var(--color-intellectra); color: #fff;
  padding: 5px 8px; border-radius: 8px; border-bottom-left-radius: 2px;
  display: flex; gap: 4px; align-items: flex-start;
}
.fi-it-qa__dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: rgba(255,255,255,0.7); flex-shrink: 0; margin-top: 3px;
}

/* Feature 2: Multi-language */
.fi-multilang { width: 100%; display: flex; align-items: center; gap: 6px; }
.fi-multilang__docs { display: flex; flex-direction: column; gap: 4px; flex-shrink: 0; }
.fi-lang-doc {
  display: flex; align-items: center; gap: 5px;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: 5px; padding: 3px 7px;
}
.fi-lang-tag {
  font-size: 7.5px; font-weight: 700; padding: 1px 4px; border-radius: 3px; flex-shrink: 0;
}
.fi-lang-tag--en { background: #dbeafe; color: #1d4ed8; }
.fi-lang-tag--zh { background: #fee2e2; color: #dc2626; }
.fi-lang-tag--ko { background: #d1fae5; color: #065f46; }
.fi-lang-lines { display: flex; flex-direction: column; gap: 2px; }
.fi-lang-line { display: block; height: 2px; background: var(--gray-300); border-radius: 1px; width: 36px; }
.fi-lang-line--short { width: 22px; }
.fi-multilang__result { flex: 1; }
.fi-it-result {
  background: var(--color-intellectra-bg); border: 1.5px solid var(--color-intellectra);
  border-radius: 8px; padding: 8px 10px;
}
.fi-it-result__label {
  font-size: 7px; font-weight: 700; color: var(--color-intellectra);
  margin-bottom: 4px; letter-spacing: 0.04em;
}
.fi-it-result__text { font-size: 8.5px; color: var(--gray-700); line-height: 1.4; }

/* Feature 3: Student → Intellectra app */
.fi-seminar { width: 100%; display: flex; align-items: center; gap: 8px; }
.fi-seminar__left {
  display: flex; flex-direction: column; align-items: center; gap: 2px; flex-shrink: 0;
}
.fi-think--it { border-color: var(--color-intellectra); }
.fi-think--it::after { border-top-color: var(--color-intellectra); }
.fi-it-person-label { font-size: 7px; color: var(--gray-500); white-space: nowrap; }
.fi-it-arrow-big { font-size: 18px; font-weight: 700; color: var(--color-intellectra); flex-shrink: 0; }
.fi-it-app {
  flex: 1; background: white;
  border: 1px solid var(--gray-200); border-radius: 8px;
  overflow: hidden; box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.fi-it-app__header {
  background: var(--color-intellectra); padding: 4px 8px;
  display: flex; align-items: center; gap: 4px;
}
.fi-it-app__result {
  font-size: 8px; font-weight: 600; color: var(--color-intellectra);
  display: flex; align-items: center; gap: 4px;
}
.fi-it-doc-icon {
  display: inline-block; width: 8px; height: 10px; flex-shrink: 0;
  background: var(--color-intellectra); border-radius: 1px; opacity: 0.7;
}

/* LT-AI two-column features */
.product__features--two-col {
  display: grid;
  gap: 24px;
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}
@media (min-width: 768px) {
  .product__features--two-col { grid-template-columns: 1fr 1fr; }
}
.feature-group {
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
}
.feature-group__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-900);
  padding: 16px 28px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.feature-group .feature {
  border-bottom: 1px solid var(--gray-100);
}
.feature-group .feature:last-child { border-bottom: none; }

/* Mock window (LT-AI) */
.mock-window {
  background: #fffcfa;
  border-radius: 12px;
  border: 1px solid var(--gray-200);
  overflow: hidden;
}
.mock-window__bar {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.mock-window__bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-300);
}
.mock-window__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mock-msg {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.7;
}
.mock-msg--user {
  align-self: flex-end;
  background: var(--color-lt-ai);
  color: #fff;
}
.mock-msg--ai {
  align-self: flex-start;
  background: var(--gray-100);
  color: var(--gray-700);
}
.mock-msg__src {
  display: block;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--gray-200);
  font-size: 12px;
  color: var(--gray-400);
}

/* ================================
   LT-AI Extended Sections
   ================================ */

/* 課題提起 */
.lt-ai-challenges {
  margin-top: 64px;
  text-align: center;
}
.lt-ai-challenges__title {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 28px;
}
.lt-ai-challenges__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 600px;
  margin: 0 auto;
}
.lt-ai-challenge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #ffffff;
  border: 1.5px solid #b8d4e8;
  border-radius: 10px;
  text-align: left;
}
.lt-ai-challenge__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-lt-ai);
}
.lt-ai-challenge p {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  line-height: 1.6;
}

/* 3つの強み */
.lt-ai-pillars {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 768px) {
  .lt-ai-pillars { grid-template-columns: repeat(3, 1fr); }
}
.lt-ai-pillar {
  text-align: center;
  padding: 36px 24px;
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
}
.lt-ai-pillar__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--color-lt-ai-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.lt-ai-pillar__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-lt-ai);
}
.lt-ai-pillar__label {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}
.lt-ai-pillar__desc {
  font-size: 14px;
  color: var(--color-lt-ai);
  font-weight: 600;
}

/* 電子教科書訴求 */
.lt-ai-trust {
  margin-top: 64px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  background: var(--color-lt-ai-dark);
  border-radius: 20px;
  padding: 48px 40px;
}
.lt-ai-trust__text {
  width: 100%;
}
.lt-ai-trust__title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 16px;
}
.lt-ai-trust__desc {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
}
.lt-ai-trust__points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lt-ai-trust__points li {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  padding-left: 22px;
  position: relative;
}
.lt-ai-trust__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
}
.lt-ai-trust__visual {
  width: 100%;
}

/* 2パネルレイアウト */
.lt-ai-trust__panels {
  display: flex;
  align-items: stretch;
  gap: 0;
  position: relative;
  flex-direction: row-reverse;
}
.lt-ai-trust__connector {
  flex-shrink: 0;
  width: 48px;
  background: transparent;
}
/* 矢印オーバーレイ SVG */
.lt-ai-trust__arrow-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}
.lt-ai-trust__chat {
  flex: 1;
  min-width: 0;
  background: #fff;
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.lt-ai-trust__pdf-ref {
  background: #e5edf5;
  border: 1px solid rgba(26, 54, 84, 0.25);
  border-radius: 6px;
  padding: 6px 10px;
  margin-top: 8px;
  color: #1a3654 !important;
  font-weight: 600;
}
/* LT-AI チャットモック */
.lt-ai-trust__chat {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  background: #fff;
}
.lt-ai-trust__chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  height: 40px;
  background: #d8f0f8;
  color: #1a3654;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}
.lt-ai-trust__chat-brand {
  font-size: 13px;
  font-weight: 800;
  color: #1a3654;
  letter-spacing: 0.05em;
}
.lt-ai-trust__chat-lecture {
  flex: 1;
  font-size: 11px;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}
.lt-ai-trust__chat-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  color: #2563eb;
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lt-ai-trust__chat-main {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.lt-ai-trust__chat-sidebar {
  width: 38%;
  flex-shrink: 0;
  background: #e8e8e8;
  border-right: 1px solid rgba(26, 54, 84, 0.12);
  display: flex;
  flex-direction: column;
  padding: 10px 8px;
  gap: 6px;
}
.lt-ai-trust__chat-sidebar-back {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: #fff;
  font-weight: 600;
  padding: 6px 8px;
  background: #1a3654;
  margin: -10px -8px 4px;
}
.lt-ai-trust__chat-sidebar-dropdown {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  color: var(--gray-800);
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 5px;
  padding: 5px 8px;
}
.lt-ai-trust__chat-sidebar-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 600;
  color: #fff;
  background: #2563eb;
  border-radius: 5px;
  padding: 6px 8px;
}
.lt-ai-trust__chat-sidebar-list-label {
  font-size: 10px;
  color: var(--gray-500);
  padding: 4px 6px;
  margin-top: 4px;
}
.lt-ai-trust__chat-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}
.lt-ai-trust__chat-content-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-700);
  padding: 8px 12px;
  border-bottom: 1px solid var(--gray-200);
}
.lt-ai-trust__chat-body {
  flex: 1;
  padding: 10px 12px;
  overflow: hidden;
  font-size: 12px;
}
.lt-ai-trust__chat .lt-ai-feature-slide__mock-user {
  width: 100%;
  margin-left: 0;
  margin-bottom: 10px;
  background: none;
  border-radius: 0;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 0 8px 0;
  font-weight: 600;
  font-size: 12px;
  text-align: left;
}
.lt-ai-trust__chat .lt-ai-feature-slide__mock-result {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
}
[data-slide-index="3"] .lt-ai-feature-slide__mock-user {
  width: 100%;
  margin-left: 0;
  margin-bottom: 10px;
  background: none;
  border-radius: 0;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 0 8px 0;
  font-weight: 600;
  font-size: 12px;
  text-align: left;
}
[data-slide-index="3"] .lt-ai-feature-slide__mock-result {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
}
.lt-ai-trust__chat-input {
  padding: 8px 10px 6px;
  border-top: 1px solid var(--gray-200);
  background: #fff;
  flex-shrink: 0;
}
.lt-ai-trust__chat-input-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.lt-ai-trust__chat-input-box {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  padding: 6px 8px 6px 10px;
}
.lt-ai-trust__chat-input-placeholder {
  flex: 1;
  font-size: 11px;
  color: var(--gray-400);
}
.lt-ai-trust__chat-send {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  color: #aaa;
}
.lt-ai-trust__chat-counter {
  font-size: 9px;
  color: #1a3654;
  padding: 2px 2px 0;
  display: block;
}

/* ブラウザ Chrome */
.lt-ai-trust__browser-tabbar {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  background: #202124;
  padding: 6px 8px 0;
}
.lt-ai-trust__browser-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #3c3c3c;
  color: #e8eaed;
  font-size: 11px;
  padding: 6px 12px;
  border-radius: 8px 8px 0 0;
  max-width: 200px;
  overflow: hidden;
}
.lt-ai-trust__browser-tab svg { color: #8ab4f8; flex-shrink: 0; }
.lt-ai-trust__browser-tab span:nth-child(2) {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.lt-ai-trust__browser-tab-close {
  color: #9aa0a6;
  font-size: 13px;
  line-height: 1;
  flex-shrink: 0;
}
.lt-ai-trust__browser-newtab {
  color: #9aa0a6;
  font-size: 16px;
  padding: 0 6px 6px;
  line-height: 1;
}
.lt-ai-trust__browser-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #3c3c3c;
  padding: 6px 12px;
}
.lt-ai-trust__browser-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.lt-ai-trust__browser-nav-btn {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #e8eaed;
  border-radius: 50%;
}
.lt-ai-trust__browser-nav-btn--disabled { color: #5f6368; }
.lt-ai-trust__browser-address {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  background: #202124;
  border-radius: 100px;
  padding: 5px 12px;
  font-size: 11px;
  color: #bdc1c6;
  overflow: hidden;
}
.lt-ai-trust__browser-address span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lt-ai-trust__browser-address svg { color: #8ab4f8; flex-shrink: 0; }
.lt-ai-trust__browser-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

/* PDFビューア */
.lt-ai-trust__pdf-viewer {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.lt-ai-trust__pdf-body {
  position: relative;
  background: #525659;
  padding: 12px 20px 44px;
  display: flex;
  justify-content: center;
  flex: 1;
}
.lt-ai-trust__pdf-bottom-bar {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 2px;
  background: #3c3c3c;
  border-radius: 100px;
  padding: 5px 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  white-space: nowrap;
}
.lt-ai-trust__pdf-arrow {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
}
.lt-ai-trust__pdf-arrow:hover { background: rgba(255,255,255,0.1); }
.lt-ai-trust__pdf-page-badge {
  font-size: 11px;
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 2px 8px;
  margin: 0 4px;
}
.lt-ai-trust__pdf-bar-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.25);
  margin: 0 6px;
}
.lt-ai-trust__pdf-tool {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
}
.lt-ai-trust__pdf-tool:hover { background: rgba(255,255,255,0.1); }
.lt-ai-trust__pdf-page {
  background: #fff;
  width: 100%;
  max-width: 640px;
  padding: 24px 36px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.35);
}
.lt-ai-trust__pdf-chapter {
  width: 48%;
  height: 13px;
  border-radius: 2px;
  background: #b0bec8;
  margin-bottom: 20px;
}
.lt-ai-trust__pdf-line {
  height: 10px;
  border-radius: 3px;
  background: #dde3e8;
  width: 100%;
  margin-bottom: 9px;
}
.lt-ai-trust__pdf-line--short { width: 60%; }
.lt-ai-trust__pdf-line--mid   { width: 80%; }
.lt-ai-trust__pdf-highlight {
  background: rgba(26, 54, 84, 0.08);
  border: 2px solid #e03030;
  padding: 6px 14px 12px;
  border-radius: 4px;
  margin: 12px 0;
}
.lt-ai-trust__pdf-highlight .lt-ai-trust__pdf-line {
  background: rgba(26, 54, 84, 0.3);
  margin-bottom: 8px;
}
.lt-ai-trust__pdf-highlight .lt-ai-trust__pdf-line:last-child {
  margin-bottom: 0;
}
.lt-ai-trust__pdf-highlight-label {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  color: #fff;
  background: #1a3654;
  padding: 2px 7px;
  border-radius: 3px;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.lt-ai-trust__pdf-pagenum {
  text-align: center;
  font-size: 10px;
  color: #aab;
  margin-top: 20px;
  letter-spacing: 0.1em;
}

/* 機能一覧バッジ */
.lt-ai-functions {
  margin-top: 64px;
  margin-bottom: 32px;
  text-align: center;
}
.lt-ai-functions__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}
.lt-ai-functions__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.lt-ai-badge {
  display: inline-block;
  padding: 10px 24px;
  background: var(--color-lt-ai);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
}

/* 構成図 */
.lt-ai-arch {
  margin-top: 64px;
  padding: 40px 24px 0;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  overflow: hidden;
}
/* ================================
   機能イメージスライダー
   ================================ */
.lt-ai-feature-slider {
  margin-top: 64px;
  text-align: center;
}
.lt-ai-feature-slider__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}
.lt-ai-feature-slider__tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}
/* タブグループレイアウト */
.lt-ai-feature-slider__tab-groups {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}
.lt-ai-feature-slider__tab-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.lt-ai-feature-slider__tab-group-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-600);
  letter-spacing: 0.02em;
}
.lt-ai-feature-slider__tab-group-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}
.lt-ai-feature-slider__tab {
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border: 1.5px solid var(--color-lt-ai);
  border-radius: 20px;
  background: #fff;
  color: var(--color-lt-ai);
  cursor: pointer;
  transition: all 0.2s;
}
.lt-ai-feature-slider__tab:not(.lt-ai-feature-slider__tab--active):hover {
  background: var(--color-lt-ai-bg);
}
.lt-ai-feature-slider__tab--active {
  background: var(--color-lt-ai);
  color: #fff;
}
.lt-ai-feature-slider__viewport {
  position: relative;
  height: 320px;
}

/* スライド */
.lt-ai-feature-slide {
  display: none;
  gap: 24px;
  text-align: left;
  flex-direction: row;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
}
.lt-ai-feature-slide--active {
  display: flex;
  height: 100%;
}

/* モック画面（左） */
.lt-ai-feature-slide__mock {
  flex: 1;
  min-width: 0;
  background: #ffffff;
  border-right: 1px solid var(--gray-200);
  overflow: hidden;
}
.lt-ai-feature-slide__mock-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: #d8f0f8;
  color: #1a3654;
  font-size: 13px;
  font-weight: 600;
}
.lt-ai-feature-slide__mock-bot {
  font-size: 11px;
  font-weight: 800;
  color: #1a3654;
}
.lt-ai-feature-slide__mock-bot--teacher {
  background: #e07a00;
}
.lt-ai-feature-slide__mock-body {
  padding: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray-700);
}
.lt-ai-feature-slide__mock-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 10px;
}
.lt-ai-feature-slide__mock-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.lt-ai-feature-slide__mock-btn {
  font-size: 11px;
  padding: 6px 14px;
  border: 1.5px solid #a0a0b4;
  border-radius: 6px;
  background: #fff;
  color: var(--gray-700);
}
.lt-ai-feature-slide__mock-user {
  background: #e8f0f8;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 12px;
  margin-bottom: 12px;
  text-align: right;
  color: var(--gray-800);
}
.lt-ai-feature-slide__mock-result {
  background: #fff;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.7;
}
.lt-ai-feature-slide__mock-result-title {
  font-weight: 700;
  color: var(--color-lt-ai);
  margin-bottom: 6px;
  font-size: 12px;
}
.lt-ai-feature-slide__mock-choices {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
  font-size: 11px;
}
.lt-ai-feature-slide__mock-refs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
  font-size: 11px;
  color: var(--color-lt-ai);
}
.lt-ai-feature-slide__mock-note {
  font-size: 11px;
  color: var(--gray-500);
  margin-top: 6px;
}

/* 管理機能モック */
.lt-ai-feature-slide__mock-mgmt {
  display: flex;
  gap: 12px;
}
.lt-ai-feature-slide__mock-mgmt-card {
  flex: 1;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 12px;
  font-size: 11px;
}
.lt-ai-feature-slide__mock-mgmt-title {
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 4px;
  font-size: 12px;
}
.lt-ai-feature-slide__mock-files {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
  font-size: 11px;
}
.lt-ai-feature-slide__mock-upload {
  color: var(--color-lt-ai);
  font-weight: 600;
}
.lt-ai-feature-slide__mock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.lt-ai-feature-slide__mock-tags span {
  font-size: 10px;
  padding: 4px 10px;
  background: var(--gray-100);
  border-radius: 12px;
  color: var(--gray-700);
}

/* ステップ（スライド作成補助） */
.lt-ai-feature-slide__mock-steps {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 0;
}
.lt-ai-feature-slide__mock-step {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-700);
}
.lt-ai-feature-slide__mock-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-lt-ai);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.lt-ai-feature-slide__mock-step-arrow {
  color: var(--gray-400);
  font-size: 16px;
}

/* 説明（右） */
.lt-ai-feature-slide__desc {
  flex: 0 0 280px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.lt-ai-feature-slide__desc h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  white-space: nowrap;
}
.lt-ai-feature-slide__badge {
  font-size: 11px;
  font-weight: 600;
  color: #e07a00;
  border: 1px solid #e07a00;
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 8px;
}
.lt-ai-feature-slide__badge--student {
  color: #6a3d9a;
  border-color: #6a3d9a;
}
.lt-ai-feature-slide__badge--common {
  color: #0078d4;
  border-color: #0078d4;
}
.lt-ai-feature-slide__desc p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray-700);
  margin-bottom: 10px;
}
.lt-ai-feature-slide__desc ul {
  list-style: disc;
  padding-left: 18px;
}
.lt-ai-feature-slide__desc li {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ================================
   システム構成図 (sysarch)
   ================================ */
.sysarch {
  max-width: 1120px;
  margin: 0 auto;
}

/* ----- Top Row: 3 entry-point boxes ----- */
.sysarch__top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 0;
}
.sysarch__entry {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 12px 16px;
  border-radius: 12px;
  color: #fff;
  text-align: center;
}
.sysarch__entry--student { background: #6a3d9a; }
.sysarch__entry--teacher { background: #4a8c3f; }
.sysarch__entry--datasrc {
  background: #f0a500;
  justify-content: space-evenly;
}
/* ----- Mini chat UI inside entry boxes ----- */
.sysarch__mini-chat {
  width: 100%;
  max-width: 200px;
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  font-size: 10px;
  line-height: 1.4;
  color: #333;
}
.sysarch__mini-chat-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 4px 3px 8px;
  background: #f0f0f0;
  border-bottom: 1px solid #ddd;
}
.sysarch__mini-chat-title {
  font-size: 9px;
  font-weight: 600;
  color: #555;
}
.sysarch__mini-chat-controls {
  display: flex;
  gap: 0;
}
.sysarch__mini-chat-ctrl {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 14px;
  font-size: 8px;
  color: #666;
  line-height: 1;
}
.sysarch__mini-chat-ctrl:hover {
  background: #ddd;
}
.sysarch__mini-chat-ctrl--close:hover {
  background: #e81123;
  color: #fff;
}
.sysarch__mini-chat-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
}
.sysarch__mini-chat-msg {
  padding: 4px 8px;
  border-radius: 8px;
  max-width: 85%;
}
.sysarch__mini-chat-msg--user {
  align-self: flex-end;
  background: #e3e8ff;
  color: #333;
}
.sysarch__entry--student .sysarch__mini-chat-msg--user {
  background: #e8d5f5;
}
.sysarch__entry--teacher .sysarch__mini-chat-msg--user {
  background: #d5ecd0;
}
.sysarch__mini-chat-msg--ai {
  align-self: flex-start;
  background: #f5f5f5;
  color: #555;
}
.sysarch__mini-chat-input {
  padding: 4px 8px;
  border-top: 1px solid #eee;
  color: #aaa;
  font-size: 9px;
}
.sysarch__entry-icons {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sysarch__entry-sp-icon {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 4px;
}

/* Data source products layout */
.sysarch__entry-products {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: flex-end;
  flex: 1;
}
.sysarch__entry-product {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.sysarch__entry-product-icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  max-width: 120px;
}
.sysarch__entry-product-main {
  width: 64px;
  height: 64px;
  object-fit: contain;
}
.sysarch__entry-product-icons--others .sysarch__entry-product-main {
  width: 48px;
  height: 48px;
}
.sysarch__entry-mini-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: rgba(255,255,255,0.85);
  color: #333;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}
.sysarch__entry-mini-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.sysarch__entry-mini-icon--contact {
  background: rgba(255,255,255,0.85);
}
.sysarch__entry-product-name {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
}

.sysarch__entry-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}
.sysarch__entry-role {
  font-size: 11px;
  opacity: 0.85;
}

/* ----- Arrows: Top → Middle ----- */
.sysarch__arrows-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  padding: 0;
  margin-top: 0;
}
.sysarch__arrow-cell {
  display: flex;
  justify-content: center;
  align-items: stretch;
  height: 56px;
  position: relative;
}
.sysarch__arrow-down {
  width: 4px;
  height: 100%;
  position: relative;
}
.sysarch__arrow-down::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 8px;
  clip-path: polygon(50% 100%, 0 0, 100% 0);
}
.sysarch__arrow-down--purple,
.sysarch__arrow-down--purple::after { background: #6a3d9a; }
.sysarch__arrow-down--green,
.sysarch__arrow-down--green::after  { background: #4a8c3f; }
.sysarch__arrow-down--yellow,
.sysarch__arrow-down--yellow::after { background: #f0a500; }
.sysarch__arrow-down--cyan,
.sysarch__arrow-down--cyan::after   { background: #00bcd4; }

/* 学生用矢印: セル内で右寄せ（App Service方向） */
.sysarch__arrow-cell--student {
  justify-content: flex-end;
  padding-right: 5%;
}
/* 教員用矢印: セル内で左寄せ（App Service方向） */
.sysarch__arrow-cell--teacher {
  justify-content: flex-start;
  padding-left: 5%;
}
/* データソース矢印: セル内で左寄せ（Azure Functions方向） */
.sysarch__arrow-cell--datasrc {
  justify-content: flex-start;
  padding-left: 17%;
}

/* ----- Grid: Middle + Bottom Rows ----- */
.sysarch__grid {
  display: grid;
  grid-template-columns:
    minmax(80px, 1.5fr) 48px minmax(80px, 1fr) 48px minmax(80px, 1fr) 48px minmax(80px, 1fr) 48px minmax(80px, 1fr);
  grid-template-rows: auto 64px auto 64px auto;
  align-items: center;
  justify-content: center;
  justify-items: center;
  column-gap: 8px;
  row-gap: 8px;
  padding: 12px 0;
}

/* Grid cell placement classes */
.sysarch__cell-c1-r1 { grid-column: 1; grid-row: 1; }
.sysarch__cell-c2-r1 { grid-column: 2; grid-row: 1; }
.sysarch__cell-c3-r1 { grid-column: 3; grid-row: 1; }
.sysarch__cell-c4-r1 { grid-column: 4; grid-row: 1; }
.sysarch__cell-c5-r1 { grid-column: 5; grid-row: 1; }
.sysarch__cell-c6-r1 { grid-column: 6; grid-row: 1; }
.sysarch__cell-c7-r1 { grid-column: 7; grid-row: 1; }
.sysarch__cell-c8-r1 { grid-column: 8; grid-row: 1; }
.sysarch__cell-c9-r1 { grid-column: 9; grid-row: 1; }
.sysarch__cell-c3-r2 { grid-column: 3; grid-row: 2; }
.sysarch__cell-c7-r2 { grid-column: 7; grid-row: 2; }
.sysarch__cell-c9-r2 { grid-column: 9; grid-row: 2; }
.sysarch__cell-c3-r3 { grid-column: 3; grid-row: 3; }
.sysarch__cell-c4-r3 { grid-column: 4; grid-row: 3; }
.sysarch__cell-c5-r3 { grid-column: 5; grid-row: 3; }
.sysarch__cell-c7-r3 { grid-column: 7; grid-row: 3; }
.sysarch__cell-c9-r3 { grid-column: 9; grid-row: 3; }
.sysarch__cell-c5-r4 { grid-column: 5; grid-row: 4; }
.sysarch__cell-curve { grid-column: 5 / 10; grid-row: 4 / 6; }
.sysarch__cell-c5-r5 { grid-column: 5; grid-row: 5; z-index: 2; position: relative; }

.sysarch__grid > .sysarch__node,
.sysarch__grid > .sysarch__node-pair {
  align-self: start;
  position: relative;
  z-index: 1;
}
.sysarch__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 90px;
  text-align: center;
}
.sysarch__node--m365 {
  border: 2px solid #0078d4;
  border-radius: 12px;
  padding: 12px 16px 12px;
  background: #f0f6ff;
  margin-top: -28px;
}
.sysarch__node-icons {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sysarch__node-icons svg {
  width: 28px;
  height: 28px;
}
.sysarch__node-icon-img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}
.sysarch__node-azure-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}
.sysarch__node-azure-icon svg {
  width: 48px;
  height: 48px;
}
.sysarch__node-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  line-height: 1.4;
}
.sysarch__node-label small {
  font-size: 12px;
  font-weight: 400;
  color: var(--gray-500);
}

/* Node pair (Cosmos DB + SharePoint side by side) */
.sysarch__node-pair {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: -10px;
}
.sysarch__node-pair > .sysarch__node {
  min-width: auto;
}
.sysarch__node-pair .sysarch__node {
  flex-direction: row;
  gap: 8px;
}
.sysarch__node-pair .sysarch__node-label {
  text-align: left;
}
.sysarch__node-pair .sysarch__node-icon-img {
  width: 32px;
  height: 32px;
}
.sysarch__node-pair-note {
  font-size: 12px;
  color: #d32f2f;
  font-weight: 600;
  margin-top: 2px;
}

/* Horizontal arrows
   ノードのアイコン(48px)の中心(24px)に矢印を揃える。
   ノードは align-self:start なので top=0 がノード先頭。
   矢印4px厚の中心を24pxに → margin-top:22px */
.sysarch__harrow {
  width: calc(100% + 16px);
  height: 4px;
  position: relative;
  flex-shrink: 0;
  align-self: start;
  margin-top: 22px;
}
.sysarch__harrow::after {
  content: '';
  position: absolute;
  right: -5px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 12px;
  clip-path: polygon(100% 50%, 0 0, 0 100%);
}
.sysarch__harrow--cyan,
.sysarch__harrow--cyan::after { background: #00bcd4; }
.sysarch__harrow--yellow,
.sysarch__harrow--yellow::after { background: #f0a500; }

/* harrow-group: 他の横矢印と同じ高さに揃える */
.sysarch__harrow-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  align-self: start;
  margin-top: 22px;
}
/* harrow-group内のharrow-biはグループの位置制御に任せる */
.sysarch__harrow-group .sysarch__harrow-bi {
  width: calc(100% + 16px);
  margin-top: 0;
  align-self: auto;
}
.sysarch__harrow-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
  line-height: 1.3;
  text-align: center;
  white-space: nowrap;
}

/* Bidirectional horizontal arrow */
.sysarch__harrow-bi {
  width: calc(100% + 16px);
  height: 4px;
  position: relative;
  flex-shrink: 0;
  align-self: start;
  margin-top: 22px;
}
.sysarch__harrow-bi::before,
.sysarch__harrow-bi::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 12px;
}
.sysarch__harrow-bi::after {
  right: -5px;
  clip-path: polygon(100% 50%, 0 0, 0 100%);
}
.sysarch__harrow-bi::before {
  left: -5px;
  clip-path: polygon(0 50%, 100% 0, 100% 100%);
}
.sysarch__harrow-bi--cyan,
.sysarch__harrow-bi--cyan::after,
.sysarch__harrow-bi--cyan::before { background: #00bcd4; }

/* Row3の harrow-bi は独立セルなので別途 align */
.sysarch__cell-c4-r3 .sysarch__harrow-bi,
.sysarch__harrow-bi.sysarch__cell-c4-r3 {
  margin-top: 22px;
}

/* ----- Vertical arrows (grid) -----
   矢頭は行の内側に収める。row-gap:8pxを考慮し
   矢頭のはみ出しを gap 内に抑える */
.sysarch__varrow {
  width: 4px;
  height: calc(100% - 20px);
  margin: 10px 0;
  position: relative;
  justify-self: center;
}
.sysarch__varrow::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 8px;
  clip-path: polygon(50% 100%, 0 0, 100% 0);
}
.sysarch__varrow--cyan,
.sysarch__varrow--cyan::after { background: #00bcd4; }
.sysarch__varrow--yellow,
.sysarch__varrow--yellow::after { background: #f0a500; }

/* Bidirectional vertical arrow */
.sysarch__varrow-bi {
  width: 4px;
  height: calc(100% - 20px);
  margin: 10px 0;
  position: relative;
  justify-self: center;
}
.sysarch__varrow-bi::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 8px;
  clip-path: polygon(50% 0, 0 100%, 100% 100%);
}
.sysarch__varrow-bi::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 8px;
  clip-path: polygon(50% 100%, 0 0, 100% 0);
}
.sysarch__varrow-bi--cyan,
.sysarch__varrow-bi--cyan::before,
.sysarch__varrow-bi--cyan::after { background: #00bcd4; }

/* Upward vertical arrow */
.sysarch__varrow-up {
  width: 4px;
  height: calc(100% - 20px);
  margin: 10px 0;
  position: relative;
  justify-self: center;
}
.sysarch__varrow-up::after {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 8px;
  clip-path: polygon(50% 0, 0 100%, 100% 100%);
}
.sysarch__varrow-up--cyan,
.sysarch__varrow-up--cyan::after { background: #00bcd4; }

/* L-shaped lines: Doc Intel & Speech → Blob Storage (HTML/CSS版)
   sysarch__cell-curve は grid-column:5/10, grid-row:4/6 で配置。
   内部の %指定は cols 5-9 全体幅に対する比率。
   ───────────────────────────────────
   col5(1fr) gap col6(48) gap col7(1fr) gap col8(48) gap col9(1fr)
   1fr≈173px 時: 全幅≈647px
     col7 center ≈ 50%
     col9 center ≈ 87%
     col5 icon右端 ≈ 18%
     Blob icon center Y ≈ 60% (row4=72 + gap=8 + 32 ≈ 112 / 188)
   ─────────────────────────────────── */
.sysarch__curve {
  position: relative;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* 縦線: DocIntel から下へ */
.sysarch__curve-v {
  position: absolute;
  width: 4px;
  top: 0;
  background: #f0a500;
}
.sysarch__curve-v--docintel {
  left: 50%;
  transform: translateX(-50%);
  height: 60%;
}
.sysarch__curve-v--speech {
  left: 87%;
  transform: translateX(-50%);
  height: 60%;
}

/* 横線: Speech位置からBlob右端まで左方向に伸びる */
.sysarch__curve-h {
  position: absolute;
  top: 60%;
  transform: translateY(-50%);
  left: 21%;
  right: calc(100% - 87%);
  height: 4px;
  background: #f0a500;
}

/* 左向き矢頭: 他の harrow と同じ clip-path */
.sysarch__curve-h::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 12px;
  background: #f0a500;
  clip-path: polygon(0 50%, 100% 0, 100% 100%);
}

/* ----- Legend ----- */
.sysarch__legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
  padding-top: 24px;
  padding-bottom: 24px;
  border-top: 1px solid var(--gray-200);
}
.sysarch__legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-600);
}
.sysarch__legend-line {
  display: inline-block;
  width: 24px;
  height: 3px;
  border-radius: 2px;
}
.sysarch__legend-line--cyan   { background: #00bcd4; }
.sysarch__legend-line--yellow { background: #f0a500; }

/* 初期状態: PNG は非表示（JS が幅に応じて切り替え） */
.sysarch-mobile-svg {
  display: none;
  text-align: center;
  margin: 0 auto;
  padding-bottom: 24px;
}

/* 1099px以下: CSS図を強制非表示・PNG図を強制表示（JSフォールバック） */
@media (max-width: 1099px) {
  .sysarch            { display: none !important; }
  .sysarch-mobile-svg { display: block !important; padding-bottom: 0; overflow: hidden; }
  .sysarch-mobile-svg img { transform: scale(1.03); } /* タブレット: エッジのみクリップ */
  .lt-ai-arch__title  { display: none !important; }
  .lt-ai-arch         { padding: 24px !important; }
}
/* 767px以下: モバイル追加調整 */
@media (max-width: 767px) {
  .lt-ai-arch         { padding: 16px !important; }
  .sysarch-mobile-svg img { transform: translateX(-2%) scale(1.05); }
}


.lt-ai-arch__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  text-align: center;
  margin-bottom: 32px;
}

/* -- 上部フロー -- */
.arch-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-bottom: 540px;
}
.arch-flow__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 80px;
}
.arch-flow__icon {
  width: 56px;
  height: 56px;
  border-radius: 0;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.arch-flow__icon svg {
  width: 56px;
  height: 56px;
}
.arch-flow__icon--student {
  width: 30px;
  height: 52px;
}
.arch-flow__icon--student svg {
  width: 48px;
  height: 48px;
}
.arch-flow__img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 0;
}
.arch-flow__label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
  text-align: center;
  line-height: 1.4;
}

/* 矢印 */
.arch-flow__arrows {
  display: flex;
  align-items: center;
  padding-top: 14px;
  gap: 2px;
  margin: 0 6px;
}
@media (min-width: 768px) {
  .arch-flow__arrows { margin: 0 10px; }
}
.arch-flow__arrows span {
  display: block;
  width: 40px;
  height: 0;
  border-top: 2.5px solid #f26524;
  position: relative;
}
.arch-flow__arrows span::after {
  content: '';
  position: absolute;
  right: -2px;
  top: -6px;
  border-left: 8px solid #f26524;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}
/* 双方向矢印（上下2段） */
.arch-flow__arrows--bi {
  flex-direction: column;
  gap: 6px;
  padding-top: 20px;
}
.arch-flow__arrows--bi span:first-child {
  border-top-color: #f26524;
}
.arch-flow__arrows--bi span:first-child::after {
  border-left-color: #f26524;
}
.arch-flow__arrows--bi span:last-child {
  transform: rotate(180deg);
  border-top-color: #0078D4;
}
.arch-flow__arrows--bi span:last-child::after {
  border-left-color: #0078D4;
}

/* -- Azure OpenAI ノード（コネクタ親） -- */
.arch-flow__node--connector {
  position: relative;
}

/* -- コネクタ → SharePoint (Azure OpenAI の真下) -- */
.arch-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 6px;
  position: relative;
}
/* 下向き矢印（他の矢印と同サイズ） */
.arch-connector__arrow-down {
  width: 0;
  height: 40px;
  border-left: 2.5px solid #f26524;
  position: relative;
}
.arch-connector__arrow-down::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: -6px;
  border-top: 8px solid #f26524;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
}
.arch-connector__sp-img {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-top: 6px;
}
/* SharePoint ラベル */
.arch-connector__sp-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
  text-align: center;
  margin-top: 4px;
}

/* -- コネクタ内カード（デフォルト：右側） -- */
.arch-connector__card {
  position: absolute;
  left: calc(100% + 16px);
  top: 0;
  background: var(--gray-700);
  border-radius: 10px;
  padding: 16px 18px;
  color: #fff;
  width: max-content;
  max-width: 260px;
  text-align: left;
  white-space: normal;
  z-index: 2;
}
/* 左側に配置（矢印の下から） */
.arch-connector__card--left {
  left: auto;
  right: calc(100% - 45px);
  top: 36px;
  max-width: 520px;
}
/* 右側に配置（矢印の下から） */
.arch-connector__card--right {
  left: calc(100% - 45px);
  top: 48px;
  max-width: 420px;
}
/* 矢印の下に配置（static） */
.arch-connector__card--below {
  position: static;
  margin-top: 6px;
}
/* フロー内にインライン配置（Azure AI Searchカード） */
.arch-connector__card--inline {
  position: static;
  align-self: flex-start;
  margin-top: -16px;
  max-width: none;
}
/* カード内アイコンヘッダー（デフォルト：横並び） */
.arch-connector__card-icon-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.arch-connector__card-icon-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}
.arch-connector__card-icon-name {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
}
/* 右寄せ */
.arch-connector__card-icon-header--right {
  justify-content: flex-end;
}
/* body + icon の横並び（SharePoint用） */
.arch-connector__card:has(.arch-connector__card-body) {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.arch-connector__card-body {
  flex: 1;
  min-width: 0;
}
.arch-connector__card-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.arch-connector__card-desc {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}
.arch-connector__card-meta {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}
.arch-connector__card-divider {
  text-align: center;
  margin: 8px 0;
  color: #5b9bd5;
}
.arch-connector__card-divider svg {
  width: 28px;
  height: 28px;
}
.arch-connector__card-sub {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.arch-connector__card-list {
  list-style: none;
  display: flex;
  gap: 16px;
}
.arch-connector__card-list li {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  padding-left: 14px;
  position: relative;
}
.arch-connector__card-list li::before {
  content: '・';
  position: absolute;
  left: 0;
}

/* チャットUI（学生⇔Teams間の吹き出し） */
.arch-chat--bubble {
  position: absolute;
  left: auto;
  right: calc(100% + 80px);
  top: 48px;
  width: 420px;
  z-index: 2;
}
.arch-chat--bubble::before {
  content: '';
  position: absolute;
  top: -32px;
  right: 260px;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-bottom: 32px solid #1e3a5f;
}

/* === Teams版チャットUI === */
.teams-chat {
  background: #fff;
  border: 2px solid #6264a7;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}

/* ツールバー */
.teams-chat__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--gray-200);
  background: #fff;
}
.teams-chat__toolbar-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-800);
}
.teams-chat__toolbar-icons {
  display: flex;
  gap: 10px;
}
.teams-chat__toolbar-icons svg {
  width: 14px;
  height: 14px;
  color: var(--gray-500);
}

/* ボディ */
.teams-chat__body {
  display: flex;
  min-height: 320px;
}

/* サイドバー */
.teams-chat__sidebar {
  width: 140px;
  flex-shrink: 0;
  background: #fafafa;
  border-right: 1px solid var(--gray-200);
  padding: 6px 0;
  overflow: hidden;
}
.teams-chat__section-label {
  font-size: 9px;
  font-weight: 600;
  color: var(--gray-500);
  padding: 8px 10px 4px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.teams-chat__chat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-size: 10px;
  color: var(--gray-700);
  cursor: default;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.teams-chat__chat-item--active {
  background: #e8e8f0;
  font-weight: 600;
}
.teams-chat__bot-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #6264a7;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.teams-chat__bot-icon svg {
  width: 11px;
  height: 11px;
}
.teams-chat__ch-icon {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.teams-chat__ch-icon--purple { background: #6264a7; }
.teams-chat__ch-icon--red { background: #d13438; }

/* メインエリア */
.teams-chat__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.teams-chat__main-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 12px;
}
.teams-chat__main-header strong {
  font-size: 13px;
  color: var(--gray-900);
}
.teams-chat__tab {
  font-size: 11px;
  color: var(--gray-500);
  padding: 4px 0;
  margin-left: 4px;
}
.teams-chat__tab--active {
  color: #6264a7;
  font-weight: 600;
  border-bottom: 2px solid #6264a7;
}

/* メッセージ */
.teams-chat__messages {
  flex: 1;
  padding: 12px 14px;
  overflow: hidden;
}
.teams-chat__msg-meta {
  font-size: 10px;
  color: var(--gray-500);
  margin-bottom: 6px;
}
.teams-chat__msg-bubble {
  font-size: 10px;
  line-height: 1.7;
  color: var(--gray-800);
  margin-bottom: 10px;
}
.teams-chat__msg-bubble p {
  margin-bottom: 2px;
}
.teams-chat__msg-note {
  font-weight: 700;
  margin-top: 6px;
}

/* アクションボタン */
.teams-chat__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.teams-chat__action-btn {
  font-size: 10px;
  padding: 6px 12px;
  border: 1px solid #c8c8d6;
  border-radius: 6px;
  background: #fff;
  color: var(--gray-700);
  cursor: default;
  white-space: nowrap;
}

/* 入力エリア */
.teams-chat__input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-top: 1px solid var(--gray-200);
  background: #fff;
}
.teams-chat__input-placeholder {
  flex: 1;
  font-size: 10px;
  color: var(--gray-400);
  padding: 6px 10px;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
}
.teams-chat__input-icons {
  display: flex;
  gap: 8px;
}
.teams-chat__input-icons svg {
  width: 16px;
  height: 16px;
  color: var(--gray-400);
}

/* キャプション */
.arch-chat__caption {
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-800);
  margin-top: 12px;
}

/* SP: サイドバー非表示 */
@media (max-width: 767px) {
  .teams-chat__sidebar { display: none; }
}

/* RAGデータソース（カード内アイテム） */
.arch-datasource__items {
  display: flex;
  gap: 16px;
}
.arch-datasource__item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.arch-datasource__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5b9bd5;
  flex-shrink: 0;
}
.arch-datasource__name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 0;
  position: relative;
  top: 1px;
}
.arch-datasource__icon {
  width: 22px;
  height: 22px;
  color: rgba(255,255,255,0.5);
}
.arch-datasource__icons-row {
  display: flex;
  gap: 6px;
}

/* セキュリティ＆データ活用 */
.lt-ai-info-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 768px) {
  .lt-ai-info-grid { grid-template-columns: 1fr 1fr; }
}
.lt-ai-info-card {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
}
.lt-ai-info-card__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-lt-ai);
}
.lt-ai-info-card__title svg {
  width: 22px;
  height: 22px;
  color: var(--color-lt-ai);
  flex-shrink: 0;
}
.lt-ai-info-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lt-ai-info-card__list li {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}
.lt-ai-info-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-lt-ai);
}

/* 利用者の声 */
.lt-ai-voices {
  margin-top: 64px;
}
.lt-ai-voices__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  text-align: center;
  margin-bottom: 24px;
}
.lt-ai-voices__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lt-ai-voice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 24px;
  background: var(--color-lt-ai-bg);
  border-radius: 12px;
  border-left: 4px solid var(--color-lt-ai);
}
.lt-ai-voice__icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  color: var(--color-lt-ai);
  margin-top: 2px;
}
.lt-ai-voice__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray-700);
}
.lt-ai-voice__text strong {
  color: var(--color-lt-ai);
  font-weight: 700;
}

/* ================================
   Coming Soon
   ================================ */
.coming-soon {
  padding: 80px 0;
  background: var(--gray-50);
}
.coming-soon__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.coming-soon__badge {
  display: inline-block;
  padding: 4px 16px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-agent);
  border: 1px solid var(--color-agent);
  border-radius: 100px;
  margin-bottom: 20px;
}
.coming-soon__name {
  font-family: var(--font-en);
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 800;
  color: var(--gray-300);
  margin-bottom: 8px;
}
.coming-soon__desc {
  font-size: 15px;
  color: var(--gray-500);
  margin-bottom: 28px;
}

/* ================================
   Technology
   ================================ */
.technology {
  padding: 100px 0;
  background: #f5f3f1;
}
.technology__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
/* --- 構成要素パネル --- */
.tech-step__arrow { display: none; }

.tech-flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.tech-step {
  padding: 24px 20px;
  background: #ffffff;
  border-radius: 10px;
  border: 1px solid var(--gray-200);
}
.tech-step__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.tech-step__text {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .tech-flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    overflow: hidden;
  }
  .tech-step {
    padding: 32px 24px;
    border-radius: 0;
    border: none;
    border-right: 1px solid var(--gray-200);
    text-align: center;
  }
  .tech-step:last-child {
    border-right: none;
  }
}

/* ================================
   Security
   ================================ */
.security {
  padding: 100px 0;
  background: var(--gray-600);
  color: #fff;
}
.security__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.security__text {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.security__title {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 16px;
}
.security__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--gray-300);
}
.security__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.security-card {
  padding: 24px;
  background: rgba(255,255,255,0.09);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
}
.security-card__title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.security-card__text {
  font-size: 13px;
  color: var(--gray-300);
  line-height: 1.6;
}

/* ================================
   Flow
   ================================ */
.flow {
  padding: 100px 0;
  background: var(--gray-50);
}
.flow__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.flow__steps {
  display: grid;
  gap: 16px;
}
@media (min-width: 768px) {
  .flow__steps { grid-template-columns: repeat(3, 1fr); }
}
.flow-step {
  padding: 36px 28px;
  background: #fffcfa;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
}
.flow-step__num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 1;
  margin-bottom: 16px;
}
.flow-step__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}
.flow-step__text {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ================================
   CTA ボタン（フッター内で使用）
   ================================ */
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: var(--gray-900);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 8px;
  transition: background 0.2s, transform 0.15s;
}
.cta-btn:hover {
  background: var(--gray-700);
  transform: translateY(-1px);
}
.cta-btn__arrow {
  width: 18px;
  height: 18px;
  color: rgba(255,255,255,0.8);
}

/* ================================
   Footer（CTA統合）
   ================================ */
.footer {
  background: #f5f3f1;
  color: var(--gray-800);
  padding: 0 0 32px;
  border-top: 1px solid var(--gray-200);
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* CTA エリア */
.footer__cta {
  padding: 72px 0 64px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}
.footer__cta-title {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 16px;
}
.footer__cta-desc {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 32px;
}
.footer__divider {
  border: none;
  border-top: 1px solid var(--gray-300);
  margin: 0;
}

.footer__top {
  display: grid;
  gap: 40px;
  margin-top: 48px;
  margin-bottom: 40px;
  align-items: start;
}
@media (min-width: 768px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
}
.footer__logo-img {
  height: 30px;
  width: auto;
  margin-bottom: 12px;
}
.footer__tagline {
  font-size: 14px;
  color: var(--gray-500);
}
/* ナビ3列: 内容幅で横並び・左寄せ */
.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  gap: 40px;
}
.footer__nav-heading {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-600);
  margin-bottom: 12px;
}
.footer__nav-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer__nav-col a {
  font-size: 14px;
  color: var(--gray-600);
  transition: color 0.2s;
}
.footer__nav-col a:hover { color: var(--gray-900); }

.footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-300);
  font-size: 13px;
  color: var(--gray-500);
}
@media (min-width: 640px) {
  .footer__bottom {
    flex-direction: row-reverse;
    align-items: center;
    justify-content: space-between;
  }
}
.footer__bottom-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.footer__bottom a { transition: color 0.2s; }
.footer__bottom a:hover { color: var(--gray-900); }

/* ================================
   追加レスポンシブ対応
   ================================ */

/* --- タブレット (768px〜1023px) 共通調整 --- */
@media (max-width: 1023px) {
  /* Hero */
  .hero__inner { padding: 60px 24px 48px; gap: 40px; }

  /* Services */
  .services { padding: 80px 0 64px; }
  .services__grid { grid-template-columns: repeat(2, 1fr); }

  /* Product sections */
  .product { padding: 80px 0; }
  .product__inner { padding: 0 24px; }
  .product__main { gap: 40px; margin-bottom: 48px; }
  /* Product features: 1カラム・中央寄せ・カードを分離 */
  .product__features {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    gap: 16px;
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
  }
  .product__features .feature {
    border: 1px solid var(--gray-200);
    border-radius: 12px;
  }

  /* LT-AI pillars: 1カラム・中央寄せで引き伸ばし防止 */
  .lt-ai-pillars { grid-template-columns: 1fr; max-width: 480px; margin-top: 48px; margin-left: auto; margin-right: auto; }

  /* Technology */
  .technology { padding: 64px 0; }
  .technology__inner { padding: 0 24px; }

  /* Security */
  .security { padding: 80px 0; }
  .security__inner { padding: 0 24px; }
  .security__grid { grid-template-columns: repeat(2, 1fr); }
  .security-card:last-child { grid-column: 1 / -1; max-width: 50%; margin: 0 auto; width: 100%; }

  /* LT-AI */
  .lt-ai-arch { padding: 32px 16px 0; }
  .lt-ai-arch__title { font-size: 16px; }
  .sysarch { min-width: 900px; }

  /* lt-ai-trust: タブレット */
  .lt-ai-trust__browser-tab      { font-size: 10px; padding: 5px 10px; }
  .lt-ai-trust__browser-address  { max-width: 160px; }
  .lt-ai-trust__pdf-page         { padding: 16px 20px; }
  .lt-ai-trust__chat-sidebar     { width: 33%; }
  .lt-ai-trust__chat-sidebar-btn { font-size: 9px; padding: 5px 7px; }
}

/* --- スマートフォン (〜767px) 共通調整 --- */
@media (max-width: 767px) {
  /* Hero */
  .hero__inner { padding: 40px 16px 32px; gap: 32px; }
  .hero__title { font-size: clamp(22px, 6.5vw, 32px); }
  .hero__lead  { font-size: 14px; }
  /* カルーセルをスマホ画面に合わせて縮小 */
  .hero-carousel { height: 320px; max-width: 300px; }

  /* Section spacing */
  .product { padding: 64px 0; }
  .technology { padding: 48px 0; }
  .security { padding: 64px 0; }
  .services { padding: 64px 0 48px; }
  .services__inner,
  .product__inner,
  .technology__inner,
  .security__inner { padding: 0 16px; }

  /* Services: 1カラム */
  .services__grid { grid-template-columns: 1fr; }

  /* Product main: gap縮小 */
  .product__main { gap: 24px; margin-bottom: 32px; }

  /* Product features: 1カラム（タブレットの分離スタイルを継承） */
  .product__features { grid-template-columns: 1fr; max-width: 100%; }

  /* LT-AI pillars: 1カラム */
  .lt-ai-pillars { grid-template-columns: 1fr; max-width: 100%; margin-top: 32px; }

  /* Security grid: 1カラム・最後のカードの幅制限をリセット */
  .security__grid { grid-template-columns: 1fr; }
  .security-card:last-child { max-width: 100%; grid-column: auto; }

  /* Feature slider: 固定高さを解除・説明を上・モックを下 */
  .lt-ai-feature-slider__viewport { height: auto; }
  .lt-ai-feature-slide--active { height: auto; flex-direction: column-reverse; }
  .lt-ai-feature-slide__mock { border-right: none; border-top: 1px solid var(--gray-200); }
  .lt-ai-feature-slide__desc { flex: none; padding: 20px 16px 16px; }

  /* LT-AI arch */
  .lt-ai-arch { padding: 24px 12px 0; margin-top: 40px; }
  .lt-ai-arch__title { font-size: 15px; margin-bottom: 12px; }

  /* タブを2段折り返し（スクロールなし） */
  .lt-ai-feature-slider__tabs {
    flex-wrap: wrap;
    gap: 6px;
  }
  .lt-ai-feature-slider__tab { font-size: 12px; padding: 6px 10px; }

  /* Footer CTA */
  .footer__cta       { padding: 48px 0 40px; }
  .footer__cta-title { font-size: clamp(19px, 5vw, 24px); }
  .footer__cta-desc  { font-size: 14px; }

  /* Footer */
  .footer__inner { padding: 0 16px 24px; }
  .footer__brand { display: flex; justify-content: center; }
  .footer__nav {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  /* Prevent horizontal overflow */
  body { overflow-x: hidden; }
  .lt-ai-feature-slider { overflow-x: hidden; }

  /* lt-ai-trust: モバイル */
  .lt-ai-trust             { padding: 32px 20px; gap: 20px; margin-top: 48px; }
  .lt-ai-trust__title      { font-size: 20px; }
  .lt-ai-trust__desc       { font-size: 14px; }
  .lt-ai-trust__points li  { font-size: 13px; }
  .lt-ai-trust__panels     { flex-direction: column; gap: 12px; }
  /* モバイル: チャット上・PDF下（order で制御） */
  .lt-ai-trust__chat       { order: 1; }
  .lt-ai-trust__connector  { order: 2; }
  .lt-ai-trust__pdf-viewer { order: 3; }
  /* コネクター: 縦向き赤矢印に変更 */
  .lt-ai-trust__connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4px 0;
    width: 100%;
  }
  .lt-ai-trust__connector::before {
    content: '';
    width: 2px;
    height: 24px;
    background: #e03030;
  }
  .lt-ai-trust__connector::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 9px solid #e03030;
  }
  .lt-ai-trust__arrow-overlay { display: none; }
  .lt-ai-trust__pdf-viewer { overflow: visible; }
  .lt-ai-trust__pdf-body   { padding: 8px 10px 20px; }
  .lt-ai-trust__pdf-page   { padding: 14px 16px; }
  .lt-ai-trust__chat       { min-height: 240px; }
  .lt-ai-trust__chat-body  { font-size: 11px; padding: 8px 10px; }
  .lt-ai-trust__pdf-ref    { border: 2px solid #e03030; }
}

/* --- 小スマートフォン (〜480px) lt-ai-trust 追加調整 --- */
@media (max-width: 480px) {
  .lt-ai-trust                                    { padding: 24px 14px; }
  .lt-ai-trust__browser-tab-close                 { display: none; }
  .lt-ai-trust__browser-newtab                    { display: none; }
  .lt-ai-trust__browser-actions                   { display: none; }
  .lt-ai-trust__browser-nav-btn:not(:first-child) { display: none; }
  .lt-ai-trust__pdf-viewer                        { overflow: visible; }
  .lt-ai-trust__chat-sidebar                      { display: none; }
}

/* ============================================================
   Lightbox
   ============================================================ */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 9000;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.lightbox-overlay.is-open {
  display: flex;
}
.lightbox-inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}
.lightbox-img {
  display: block;
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  touch-action: pinch-zoom;
}
.lightbox-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #fff;
  border: none;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.lightbox-close:hover { background: #f0f0f0; }
.lightbox-trigger { cursor: zoom-in; }