@charset "utf-8";
/* CSS Document */
:root {
 font-size: 10px;
}
html {
 scroll-behavior: smooth;
 scroll-padding-top: 170px;
}
body {
 font-size: 22px; font-size: 2.2rem;
 line-height: 150%;
 /*font-family: "ten-mincho-antique", sans-serif;*/
 font-family: zen-kaku-gothic-antique, sans-serif;
 /*font-family: "biz-udpgothic", sans-serif;*/
 font-weight: bold;
 font-style: normal;
 color: #000000;
 word-break: break-all;
 background-color: #ffffff;
}

h1 {
 font-size: 32px; font-size: 3.2rem;
 line-height: 120%;
 font-weight: bold;
}
h2 {
 font-size: 28px; font-size: 2.8rem;
 line-height: 120%;
}
h3{
 font-size: 24px; font-size: 2.4rem;
 line-height: 120%;
}
a {
 transition: all 0.1s;
 text-decoration-skip-ink: none;
}
a:hover {
 color: #a80000;
 transition: all 0.1s;
}
img {
 width: 100%;
}

.wrapper {
 background-color: #eef2f5;
}
/* デバイス幅が640px以下 */
@media only screen and (max-width:640px) {
 .wrapper {
  margin-top: 50px;
 }
}

/*sectionの幅、間隔*/
section {
 width: 100%;
 max-width: 1400px;
 margin: 0 auto;
}

/*ページ内リンクのヘッダー高さ調整*/
 @media screen and (max-width: 640px) {
  html {
   scroll-padding-top: 50px;
  }
 }
 /*ページ内リンクのヘッダー高さ調整*/

/*TOPへ戻る*/
.backtotop {
 position: fixed;
 right: 20px;
 bottom: 20px;
 z-index: 88;
 display: none;
}
.backtotop a {
 display: block;
 content: url("../img/back_top.png");
 padding: 10px; 
 margin: 0;
 background-color: #5dc5c6;
 border-radius: 50%;
 text-decoration: none;
 font-weight: bold;
 box-shadow: 0 5px 0 #7e9aae;
 transition: all 0.2s;
}
.backtotop a:hover {
 box-shadow: none;
 transform: translate3d(0,5px,0);
 transition: all 0.2s;
}
/* デバイス幅が640px以下 */
@media only screen and (max-width: 600px) {
 .backtotop {
  bottom: 60px;
 }
 .backtotop a {
  background-color: rgba(93,197,198,0.70);
 }
}

/*ハンバーガーメニュー*/
#menu-button {
 display: none;
 position: fixed;
 z-index: 88;
 top: 0;
 width: 100%;
 height: 50px;
 background-color: #104469;
 box-sizing: border-box;
 box-shadow: 0px 2px 2px rgba(0,0,0,0.30);
}
.hun_txt_area {
 display: flex;
 flex-direction: row;
 padding: 5px 0 0 5px;
 box-sizing: border-box;
}
.hun_txt_area img {
 width: 40px;
 box-sizing: border-box;
 transition: all 0.2s;
}
.hun_txt_area img:hover {
 opacity: 0.7;
 transition: all 0.2s;
}
.icon {
 cursor: pointer;
 position: relative;
}
.icon span {
  position: absolute;
  right: 15px;
  width: 30px; /* 線の幅 */
  height: 3px; /* 線の太さ */
  background-color: #ffffff; /* 線の色 */
  transition: ease 0.3s;
}
.icon span:nth-of-type(1) {
  top: 15px; /* 上の線の位置調整 */
}
.icon span:nth-of-type(2) {
  top: 25px; /* 真ん中の線の位置調整 */
}
.icon span:nth-of-type(3) {
  top: 35px; /* 下の線の位置調整 */
}
.open span:nth-of-type(1) {
  top: 25px;
  transform: rotate(-45deg); /* 線の角度調整 */
}
.open span:nth-of-type(2) {
  opacity: 0; /* 透明化 */
}
.open span:nth-of-type(3) {
  top: 25px;
  transform: rotate(45deg);  /* 線の角度調整 */
}
.hun_tit {
 height: 100%;
 padding-left: 10px;
 font-style: normal;
 font-size: 16px;
 line-height: 18px;
 font-weight: bold;
 box-sizing: border-box;
}
.s_sp {
 display: none;
}
.sample-menu {
 display: none;
 width: 100%;
 position: fixed;
 z-index: 88;
 top: 50px;
 left: 0;
 background-color: #104469;
 color: #ffffff;
}
.sample-menu li {
 border-top: 1px solid #ffffff;
 box-sizing: border-box;
 font-size: 16px;
 line-height: 18px;
}
.sample-menu li:last-child {
 border-bottom: 1px solid #ffffff;
}
.sample-menu li a {
 display: inline-block;
 width: 100%;
 padding: 10px;
 color: #ffffff;
 font-weight: bold;
 text-decoration: none;
 box-sizing: border-box;
}
/* デバイス幅が640px以下 */
@media only screen and (max-width: 640px) {
 #menu-button {
  display: block;
 }
 .top_hum {
  margin-top: 50px;
 }
}

/*ヘッダー*/
#hedder {
 position: sticky;
 top: 0;
}
.hed_tit {
 position: relative;
 width: 100%;
 height: 100px;
 background-color: #ffffff;
 box-sizing: border-box;
}
.hed_tit p {
 position: absolute;
 left: 20px;
 top: 50%;
 transform: translateY(-50%);
 font-size: 35px;
 font-weight: bold;
}
.hed_tit p a {
 color: #104469;
 text-decoration: none;
 transition: all 0.2s;
}
.hed_tit p a:hover {
 opacity: 0.7;
 transition: all 0.2s;
}
.hed_logo {
 position: absolute;
 right: 20px;
 top: 50%;
 transform: translateY(-50%);
 width: 100%;
 max-width: 150px;
}
.hed_nav {
 display: flex;
 flex-direction: row;
 justify-content: center;
 align-items: center;
 background-color: #fdd213;
 padding: 10px 0;
 box-sizing: border-box;
}
.hed_nav li {
 width: calc(100%/8);
 text-align: center;
 /*font-weight: bold;*/
 border-right: 1px solid #104469;
 box-sizing: border-box;
}
.hed_nav li:last-child {
 border-right: none;
}
.hed_nav li a {
 display: flex;
 justify-content: center;
 align-items: center;
 width: 100%;
 height: 50px;
 color: #104469;
 text-decoration: none;
 box-sizing: border-box;
 transition: all 0.2s;
}
.hed_nav li a:hover {
 opacity: 0.7;
 transition: all 0.2s;
}
/* デバイス幅が750px以下 */
@media only screen and (max-width:750px) {
 .hed_tit p {
  font-size: 28px;
 }
}
/* デバイス幅が640px以下 */
@media only screen and (max-width:640px) {
 #hedder {
  display: none;
 }
}

/*メインビジュアル*/
.chiba_main_vis {
 width: 100%;
}
.chiba_main_vis img {
 vertical-align: middle;
}

/*ニュース*/
.chiba_news {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
 display: flex;
 flex-direction: row;
 justify-content: center;
 box-sizing: border-box;
}
.news_tit {
 width: 100%;
 max-width: 20%;
 font-size: 50px;
 line-height: 40px;
 color: #104469;
 text-align: center;
}
.news_tit span {
 display: block;
 font-size: 20px;
}
.news_area {
 width: 100%;
 max-width: 80%;
 height: 300px;
 overflow-y: auto;
 padding: 20px;
 background-color: #ffffff;
 border-radius: 20px;
 box-sizing: border-box;
}
.news_area dl {
 display: flex;
 padding: 10px 0;
 border-bottom: 1px dotted #fd9e13;
 box-sizing: border-box;
}
.news_area dl:last-child {
 border: none;
}
.news_area dl dt {
 width: 150px;
} 
/* デバイス幅が640px以下 */
@media only screen and (max-width:640px) {
 .chiba_news {
  flex-direction: column;
 }
 .news_tit,
 .news_area {
  max-width: 100%;
 }
 .news_area {
  margin-top: 20px;
 }
}

/*各項目*/
.main_top {
 padding: 30px 20px;
 background-color: #104469;
 box-sizing: border-box;
}
.main_top2 {
 padding: 30px 20px;
 background-color: #fdd213;
 box-sizing: border-box;
}
.lead_txt {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
 color: #ffffff;
}
.lead_txt2 {
 width: 100%;
 max-width: 800px;
 margin: 0 auto;
 color: #104469;
}
.lead_txt2 h1 {
 font-size: 50px;
 margin-bottom: 20px;
}
.lead_txt2 h2 {
 font-size: 40px;
 margin-bottom: 20px;
}
.lead_txt2 p {
 font-size: 25px;
}
/* デバイス幅が640px以下 */
@media only screen and (max-width:640px) {
 .lead_txt2 h1 {
  font-size: 40px;
 }
 .lead_txt2 h2 {
  font-size: 30px;
 }
 .lead_txt2 p {
  font-size: 22px;
 }
}
.main {
 padding: 70px 20px;
 background-color: #ffffff;
 box-sizing: border-box;
}
.main:nth-child(even) {
 background-color: #ceedee;
}
.main_tit {
 width: 100%;
 max-width: 950px;
 text-align: center;
 font-size: 40px;
 font-weight: bold;
 color: #104469;
 margin: 0 auto;
}
.main_sub {
 display: block;
 width: 100px;
 height: 5px;
 margin: 10px auto 20px;
 background-color: #fd9e13;
}
.column_tit {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
 margin-top: 20px;
 padding: 20px 10px;
 color: #ffffff;
 font-size: 25px;
 font-weight: bold;
 text-align: center;
 border-top-left-radius: 20px;
 border-top-right-radius: 20px;
 background-color: #104469;
 box-sizing: border-box;
}
.txt_area {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
 padding: 30px 20px;
 background-color: #ffffff;
 border: 2px solid #104469;
 border-top: none;
 border-bottom-left-radius: 20px;
 border-bottom-right-radius: 20px;
 box-sizing: border-box;
}
.chiba_bt {
 width: 100%;
 max-width: 500px;
 margin: 30px auto 0;
 font-weight: bold;
 text-align: center;
 transition: all 0.2s;
}
.chiba_bt a {
 display:flex;
 justify-content: center;
 align-items: center;
 width: 100%;
 height: 70px;
 color: #ffffff;
 text-decoration: none;
 background-color: #5dc5c6;
 background-image: url("../img/button.png");
 background-repeat: no-repeat;
 background-position: 95% center;
 border-radius: 35px;
 box-sizing: border-box;
 box-shadow: 0 5px 0 #7e9aae;
 transition: all 0.2s;
}
.chiba_bt a::after {
 height: 45px;
 margin-left: 10px;
}
.chiba_bt a.bt_pdf::after {
 content: url("../img/icon_pdf.png");
}
.chiba_bt a.bt_doc::after {
 content: url("../img/icon_doc.png");
}
.chiba_bt a.bt_xl::after {
 content: url("../img/icon_xl.png");
}
.chiba_bt a.bt_ppt::after {
 content: url("../img/icon_ppt.png");
}
.chiba_bt a:hover {
 box-shadow: none;
 transform: translate3d(0,5px,0);
 transition: all 0.2s;
}
.chiba_bt_null {
 display:flex;
 justify-content: center;
 align-items: center;
 width: 100%;
 max-width: 500px;
 height: 70px;
 margin: 30px auto 0;
 color: #999999;
 font-weight: bold;
 text-align: center;
 border: 2px solid #999999;
 border-radius: 35px;
 background-color: #cccccc;
 box-sizing: border-box;
}
.chiba_img {
 margin: 30px 0;
 text-align: center;
}

.faq {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
}
.faq dl {
}
.faq dl dt {
 cursor:pointer;
 width: 100%;
 padding: 20px;
 margin-top: 20px;
 align-items: center;
 color: #ffffff;
 background-color: #104469;
 border-radius: 20px;
 box-sizing: border-box;
}
.faq dl dt::before {
 content: "Q";
 font-size: 30px;
 font-weight: bold;
 margin-right: 20px;
}
.faq dl dd {
 width: 100%;
 padding: 20px;
 margin-top: 10px;
 align-items: center;
 color: #104469;
 background-color: #ffffff;
 border: 3px solid #104469;
 border-radius: 20px;
 box-sizing: border-box;
}
.faq dl dd::before {
 content: "A";
 font-size: 30px;
 font-weight: bold;
 margin-right: 20px;
}

/*フッター*/
#footer {
 color: #ffffff;
 background-color: #104469;
}
.chiba_foot_area {
 width: 100%;
 max-width: 950px;
 margin: 0 auto;
 padding: 20px 10px;
 text-align: center;
 box-sizing: border-box;
}
.chiba_foot_area p.large {
 font-size: 28px;
}
.chiba_tel {
 font-size: 40px;
 margin: 20px 0 10px;
}
.chiba_tel::before {
 content: url("../img/tel.png");
 vertical-align: middle;
 margin: 10px;
}
.chiba_copy {
 width: 100%;
 text-align: center;
 color: #104469;
 padding: 10px;
 word-break: keep-all;
 background-color: #fdd213;
 box-sizing: border-box;
}
.chiba_copy p {
 font-size: 16px;
}

/*アコーディオン用*/
.submenu {
 display: none;
}

/*文字装飾*/
.bold {
 font-weight: bold;
}
.nomal {
 font-weight: normal;
}
.red {
 color: #ff0000;
}
.blue {
 color: #0000cc;
}
.yellow {
 color: #fcc601;
}
.black {
 color: #4d4d4d;
}
.mark {
 background-color: #ffff00;
}
.line {
 text-decoration: underline;
 text-decoration-skip-ink: none;
}
.small {
 font-size: 0.8em;
}
.large {
 font-size: 1.2em;
}
.large_2 {
 font-size: 1.5em;
}
.cen {
 text-align: center;
}

/*二行目以降字下げ*/
.kai {
 text-indent: -1em;
 padding-left: 1em;
}
.kai_1-3 {
 text-indent: -1.3em;
 padding-left: 1.3em;
}
.kai_2 {
 text-indent: -2em;
 padding-left: 2em;
}
.kai_2-5 {
 text-indent: -2.5em;
 padding-left: 2.5em;
}
.kai_3 {
 text-indent: -3em;
 padding-left: 3em;
}
.kai_4 {
 text-indent: -4em;
 padding-left: 4em;
}
.kai_5 {
 text-indent: -5em;
 padding-left: 5em;
}
.kai_6 {
 text-indent: -6em;
 padding-left: 6em;
}
.kai_7 {
 text-indent: -7em;
 padding-left: 7em;
}

/*サイズ毎の表示変更*/
.pc {
 display: block;
}
.tb {
 display: none;
}
.sp {
 display: none;
}
/* デバイス幅が1000px以下 */
@media only screen and (max-width:1000px) {
 .pc {
  display: none;
 }
 .tb {
  display: block;
 }
}
/* デバイス幅が640px以下 */
@media only screen and (max-width: 640px) {
 .tb {
  display: none;
 }
 .sp {
  display: block;
 }
}

/*フロート解除*/
.clear {
 clear: both;
}

.none {
 display: none;
}