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

body {
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.6;
  color: #222;
  background-color: #fff;
}

a {
  text-decoration: none;
  color: #005f66;
}

.container {
  display: flex;
  gap: 2rem;
}

.container.narrow {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  gap: 2rem;
}

/* 主内容区域 */
.main-content {
  width: calc(100% - 220px);
}

.site-header {
  background: #f8f8f8;
  border-bottom: 1px solid #ccc;
}

.logo-bar {
  padding: 1rem;
  text-align: center;
}

.main-nav {
  background: linear-gradient(to bottom, #f9f9f9, #e8e8e8);
  border-top: 1px solid #ccc;
  border-bottom: 2px solid #ccc;
}

.nav-container {
  max-width: 960px;
  margin: 0 auto;
}

.main-nav ul {
  display: flex;
  list-style: none;
  border-left: 1px solid #ccc;
  border-right: 1px solid #ccc;
}

.main-nav li {
  flex: 1;
  text-align: center;
  border-right: 1px solid #ccc;
}

.main-nav li:last-child {
  border-right: none;
}

.main-nav a {
  font-weight: bold;
  font-size: 0.95rem;
  padding: 0.7rem 0;
  display: block;
  color: #2c5b6d;
}

.main-nav li.active a {
  background-color: #2c5b6d;
  color: white;
}

.main-nav a:hover {
  background-color: #2c5b6d;
  color: white;
}

.section-heading {
  background: linear-gradient(to bottom, #fdfdf5, #f2f2e9);
  border-top: 1px solid #ddd;
  border-bottom: 1px solid #ccc;
  padding: 1.5rem 0;
}

.section-heading h1 {
  font-size: 1.5rem;
  font-weight: bold;
}

.breadcrumb {
  font-size: 0.8rem;
  margin-bottom: 1rem;
  color: #666;
}

h2 {
  font-size: 1.2rem;
  border-left: 4px solid #c68e00;
  padding-left: 0.5rem;
  margin: 1rem 0 0.5rem;
}

.sub-title {
  font-size: 1rem;
  color: #c68e00;
  margin-bottom: 0.5rem;
}

.philosophy-box {
  background-color: #f8f9fa;
  border: 1px solid #ccc;
  padding: 1rem;
  margin-bottom: 1rem;
}

.info-box {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.greeting-text p {
  margin-bottom: 1rem;
}

.author {
  text-align: right;
  font-weight: bold;
}

/* 按???式 */
.btn-group-center {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 2rem auto;
  width: fit-content;
}

/* ?片按??停效果 */
.image-btn {
  position: relative;
  display: inline-block;
  border: none;
  padding: 0;
  background: none;
}

.image-btn img {
  transition: opacity 0.3s ease;
}

.image-btn .hover-img {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

.image-btn:hover .default-img {
  opacity: 0;
}

.image-btn:hover .hover-img {
  opacity: 1;
}

/* Sidebar */
.sidebar {
  width: 220px;
  font-size: 0.85rem;
}

.sidebar h3 {
  background-color: #2d7688;
  color: white;
  padding: 0.5rem;
  font-size: 1rem;
}

.sidebar ul {
  list-style: none;
  border: 1px solid #ccc;
  border-top: none;
}

.sidebar li {
  border-top: 1px dotted #ccc;
}

.sidebar li a {
  display: block;
  padding: 0.5rem;
  color: #005f66;
}

.site-footer {
  text-align: center;
  background-color: #005f66;
  color: white;
  padding: 1rem;
  margin-top: 2rem;
  font-size: 0.8rem;
}

/* Contact box */
.contact-box {
  margin-top: 2rem;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  text-align: center;
  font-size: 0.85rem;
}

.contact-heading {
  font-weight: bold;
  margin-bottom: 0.8rem;
  font-size: 1rem;
}

.contact-phone {
  font-size: 1.3rem;
  font-weight: bold;
  color: #005f66;
  margin: 0.5rem 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.phone-icon {
  font-size: 1.2rem;
}

.contact-time {
  font-size: 0.75rem;
  color: #333;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.contact-btn {
  display: inline-block;
  background: #2d5b62;
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  font-weight: bold;
  font-size: 0.85rem;
  text-decoration: none;
  border: 1px solid #1a3c42;
  transition: background-color 0.3s ease;
}

.contact-btn:hover {
  background-color: #19444d;
}

.divider-line {
  border: none;
  border-top: 1px solid #ddd;
  margin: 2rem auto;
  width: 100%;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.gallery-grid img {
  width: 100%;
  border: 1px solid #ccc;
  border-radius: 4px;
  object-fit: cover;
}

.video-box {
  margin-top: 2rem;
  text-align: center;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
  background: #000;
  margin: 1rem 0;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* 首??用 main 容器 */
.index-main {
  display: flex;
  justify-content: center;
}

.index-main .main-content {
  width: 100%;
  max-width: 960px;
}

.video-grid {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.video-grid video {
  width: 30%;
  height: auto;
  border: 1px solid #ccc;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  /* ??渡?画更?滑 */
}

/* 鼠??停??微放大 + 加?影 */
.video-grid video:hover {
  transform: scale(1.05); /* 放大5% */
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2); /* 添加柔和?影 */
}

/* ??式：移?端?配 Sidebar */
@media (max-width: 768px) {
  .container,
  .container.narrow {
    flex-direction: column;
  }

  .main-content {
    width: 100%;
  }

  .sidebar {
    width: 100%;
    margin-top: 2rem;
  }

  .sidebar ul {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
  }

  .sidebar li {
    flex: 1 1 50%;
    border-top: 1px dotted #ccc;
    border-right: 1px dotted #ccc;
    text-align: center;
  }

  .sidebar li:nth-child(2n) {
    border-right: none;
  }

  .sidebar h3 {
    font-size: 1.2rem;
    text-align: center;
    padding: 1rem;
  }

  .contact-box {
    margin: 2rem 0;
    padding: 1.5rem;
  }

  .contact-phone {
    font-size: 1.2rem;
  }

  .contact-btn {
    width: 100%;
  }
  .philosophy-box table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
  }

  .philosophy-box th,
  .philosophy-box td {
    border: 1px solid #ccc;
    padding: 0.5rem;
    text-align: left;
    vertical-align: top;
  }

  .philosophy-box th {
    background-color: #f0f0f0;
    width: 150px;
    white-space: nowrap;
  }

  .philosophy-box ul {
    list-style: disc;
    padding-left: 1.5rem;
  }

  .ifca-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    margin: 1rem 0;
  }

  .ifca-table th,
  .ifca-table td {
    border: 1px solid #ccc;
    padding: 0.75rem 1rem;
    vertical-align: top;
  }

  .ifca-table th {
    background-color: #fcefd9;
    white-space: nowrap;
    font-weight: normal;
    width: 140px;
  }


}