@charset "UTF-8";
/* ========== リセット & 基本設定 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  color: #333;
  line-height: 1.6;
}

/* ========== ヘッダー ========== */
.index-header {
  background: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.index-header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
@media (max-width: 767px) {
  .index-header-container {
    padding: 1rem;
  }
}

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

.index-header-logo a {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.index-header-logo-img {
  height: 48px;
  width: auto;
  display: block;
}
@media (max-width: 767px) {
  .index-header-logo-img {
    height: 40px;
  }
}

.index-header-contact {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.index-header-menu-button.active span:nth-child(2) {
  opacity: 0;
}

.index-header-menu-button.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

.index-header-menu-button {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}
.index-header-menu-button span {
  background: #5BA8C9;
  border-radius: 2px;
  transition: all 0.3s ease;
  width: 44px;
  height: 1px;
}
@media (max-width: 767px) {
  .index-header-menu-button span {
    width: 36px;
  }
}
.index-header-menu-button.active span:nth-child(1) {
  transform: rotate(45deg) translate(2px, 0px) !important;
}

.index-header-menu-button.active span:nth-child(2) {
  opacity: 0;
}

.index-header-menu-button.active span:nth-child(3) {
  transform: rotate(-45deg) translate(10px, -8px);
}

.index-header-tel {
  padding: 0.7rem 0 0.7rem 2rem;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  font-size: 20px;
  transition: background 0.3s ease;
  white-space: nowrap;
  color: #5BA8C9;
  position: relative;
}
@media (max-width: 767px) {
  .index-header-tel {
    font-size: 16px;
  }
}
.index-header-tel::before {
  position: absolute;
  content: "";
  background-color: #5BA8C9;
  -webkit-mask: url("../images/icon-tel.svg") no-repeat;
          mask: url("../images/icon-tel.svg") no-repeat;
  -webkit-mask-size: contain;
          mask-size: contain;
  width: 26px;
  height: 26px;
  left: 0;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
}

.index-notice-main-title {
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  margin-bottom: 2rem;
  color: #5BA8C9;
}

/* モバイルメニュー */
.index-mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 300px;
  height: 100vh;
  background: white;
  box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  transition: right 0.3s ease;
  overflow-y: auto;
  padding-top: 80px;
}

.index-mobile-menu.active {
  right: 0;
}

.index-mobile-menu-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.index-mobile-menu-item {
  border-bottom: 1px solid #e0e0e0;
}

.index-mobile-menu-link {
  display: block;
  padding: 1.2rem 2rem;
  color: #333;
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.3s ease;
}

.index-mobile-menu-link:hover {
  background: #f0f8ff;
  color: #5BA8C9;
}

/* オーバーレイ */
.index-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

.index-menu-overlay.active {
  display: block;
}

/* ========== フッター ========== */
.index-footer {
  background: #5BA8C9;
  color: white;
  padding: 2rem 0 1rem;
}

.index-footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.index-footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 1.3rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
}

.index-footer-logo-img {
  height: 40px;
  width: auto;
}

.index-footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.index-footer-link {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.index-footer-link:hover {
  opacity: 0.7;
}

.index-footer-copyright {
  font-size: 0.9rem;
  opacity: 0.8;
}

.border-ttl {
  font-size: 1.3rem;
  font-weight: bold;
  margin-bottom: 1rem;
  color: #555;
  position: relative;
}
.border-ttl:before {
  position: absolute;
  content: "";
  width: calc(100% - var(--len) * 1em);
  height: 1px;
  left: calc(var(--len) * 1.05em);
  top: 50%;
  transform: translateY(-50%);
  background: linear-gradient(to right, #5BA8C9 20%, #d2d2d2 20%);
}
@media (max-width: 767px) {
  .border-ttl:before {
    background: linear-gradient(to right, #5BA8C9 20%, #d2d2d2 20%);
  }
}

/* ========== ページトップへ戻るボタン ========== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #5BA8C9;
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(91, 168, 201, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease, visibility 0.3s;
  z-index: 999;
  text-decoration: none;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #4a93b1;
  box-shadow: 0 6px 16px rgba(91, 168, 201, 0.45);
}

.back-to-top:active {
  transform: translateY(2px);
}

@media (max-width: 767px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }
}