@charset "UTF-8";
/* ---------- reset & base ---------- */
html, body, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, main, menu, nav, output, ruby, section, summary, time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font: inherit;
  font-size: 100%;
  vertical-align: baseline;
}
html {
  line-height: 1;
  font-size: 62.5%;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  overflow-x: hidden;
  width: 100%;
}
body {
  overflow-x: hidden;
  width: 100%;
}
ol, ul {
  list-style: none;
}
img, a img {
  border: none;
}
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary {
  display: block;
}
a {
  color: #242424;
  text-decoration: none;
}
a:hover {
  color: #01a29f;
  opacity: .7;
}
.text-underline {
  text-decoration: underline;
}
#top {
  position: fixed;
}
header {
  font-family: 'Alegreya Sans SC', "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}
.pc-none {
  display: none;
}
/* ---------- universal box-sizing ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  min-width: 0;
}
img.lazyloaded {
  max-width: 100%;
  height: auto;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
/* ---------- 共通パーツ (compressed) ---------- */
/* ===== ボタン ===== */
.button {
  display: inline-block;
  width: 300px;
  height: 60px;
  line-height: 60px;
  font-size: 1.8rem;
  text-align: center;
  background: #000;
  color: #fff !important;
  border-radius: 30px;
  transition: .3s
}
.button, .button::before, .button::after {
  position: relative;
  box-sizing: border-box
}
.button::before, .button::after {
  content: '';
  position: absolute;
  z-index: -1
}
.button:hover {
  background: #1CA99D;
  transform: translateX(10px)
}
/* ===== 汎用リンクボタン ===== */
a.btn-bk-kadomaru, a.btn-bk-kado, a.btn-bk-kado-left {
  display: block;
  width: 160px;
  height: 40px;
  line-height: 40px;
  font-size: 1.6rem;
  text-align: center;
  border: 1px solid #676767;
  border-radius: 5px;
  transition: .3s;
  color: #333
}
a.btn-bk-kadomaru {
  height: 30px;
  line-height: 30px;
  background: #000;
  color: #fff;
  border-radius: 15px;
  float: right;
  margin-top: 20px
}
a.btn-bk-kado {
  margin: 30px auto
}
a.btn-bk-kadomaru:hover {
  background: #fff;
  color: #000
}
a.btn-bk-kado:hover {
  color: #1EB2A5;
  border-color: #1EB2A5
}
a.btn-bk-kado-left:hover {
  color: #fff;
  background: #000;
  border-color: #000
}
/* ===== ページネーション & 汎用リンク ===== */
a.page-link {
  display: inline-block;
  margin: 10px;
  padding: 5px 15px 5px 10px;
  color: #21A6A0;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0 0 3px #00000029;
  transition: .3s
}
a.page-link:hover {
  background: #f6f6f6;
  box-shadow: none
}
/* ===== 汎用ユーティリティ ===== */
img.border {
  border: 1px solid #ccc
}
.bold, strong, .font-weight-bolder {
  font-weight: 600
}
.font-color-red {
  color: #f00
}
.font-color-green {
  color: #038982
}
.font-color-orange {
  color: #FE9300
}
/* ----- フォントサイズ ----- */
.font-size-11 {
  font-size: 1.1rem
}
.font-size-13 {
  font-size: 1.3rem
}
.font-size-16 {
  font-size: 1.6rem
}
.font-size-18 {
  font-size: 1.8rem
}
.font-size-20 {
  font-size: 2rem
}
.font-size-24 {
  font-size: 2.4rem
}
/* 共通スタイル（マーカーの基本） */
.marker_yellow, .marker_yellow-thin, .marker_orange, .marker_blue, .marker_lightblue {
  display: inline;
  padding: 3px 5px;
  margin: 30px 5px;
  border-radius: 5px;
}
/* 黄色マーカー（ベタ） */
.marker_yellow {
  background: linear-gradient(transparent 0%, #ffff66 0%);
}
/* 黄色マーカー（下線風・薄く） */
.marker_yellow-thin {
  background: linear-gradient(transparent 80%, #ffea00 80%);
  padding: 0 5px;
  margin: 0 5px;
}
/* オレンジマーカー */
.marker_orange {
  background: linear-gradient(transparent 0%, #FFD31A 0%);
  padding: 3px 15px;
}
/* 青マーカー */
.marker_blue {
  background: linear-gradient(transparent 0%, #90d1d1 0%);
}
/* 水色マーカー */
.marker_lightblue {
  background: linear-gradient(transparent 0%, #d4e8e8 0%);
}
/* 強調ボックス風マーカー */
.marker_strong {
  display: block;
  padding: 15px;
  margin: 30px 5px;
  font-size: 1.5rem;
  font-weight: bold;
  border: 1px dotted #000;
  border-radius: 5px;
  background: #fff; /* 必要に応じて背景色追加 */
}
/* ----- 汎用レイアウト ----- */
.ta-l {
  text-align: left
}
.tx-al-right {
  text-align: right;
  margin-bottom: 40px;
  font-size: 1.2rem
}
.tx-al-right a:hover {
  transform: none
}
/* ===== 見出し共通スタイル ===== */
.headline1, .headline3, .headline3-title, .headline3-title-yellow {
  border-radius: 5px;
  padding: 0.5em;
}
/* ===== 見出し1 ===== */
.headline1 {
  color: #000;
  font-size: 2.8rem;
  margin: 10px 0;
  line-height: 4rem;
  padding: 15px;
  background-color: #F4F7F7;
}
/* ===== 見出し3全体ブロック ===== */
.headline3 {
  background-color: #FFF8D9;
  font-size: 2.6rem;
  font-weight: bolder;
  letter-spacing: 0.1rem;
  margin: 30px 0;
}
/* ===== 見出し3のタイトル（通常） ===== */
.headline3-title {
  background-color: #FFD31A;
  margin-right: 10px;
}
/* ===== 見出し3のタイトル（黄色系） ===== */
.headline3-title-yellow {
  background-color: #ffff66;
  margin-right: 20px;
}
/* ===== 数式・リスト・ボックス共通スタイル ===== */
.formula, .formula-box, .formula-wh, .formula-light, .for-b, .list-gray {
  border-radius: 5px;
  margin: 30px 0;
}
/* ===== 共通フォント指定（数式全体）===== */
.formula, .formula-box, .formula-wh, .for-b {
  font-family: 'EB Garamond', "游ゴシック", "ヒラギノ角ゴ Pro W3", "メイリオ", sans-serif;
  background-color: #f5f7f9;
  letter-spacing: 0.1rem;
}
/* ===== メインの数式スタイル ===== */
.formula {
  padding: 0.5em 2em;
  font-size: 3rem;
  overflow: hidden;
}
.formula img {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
}
/* ===== テキスト入り補足ブロック（小さめ）===== */
.for-b {
  padding: 0.5em 2em;
  font-size: 1.8rem;
  text-indent: 0 !important;
}
/* ===== 数式ボックス全体 ===== */
.formula-box {
  padding: 1em;
  font-size: 3rem;
}
.formula-box img {
  margin-bottom: 0 !important;
}
/* ===== 白背景の数式ブロック ===== */
.formula-wh {
  background-color: #ffffff;
  padding: 0.5em 2em;
  font-size: 3rem;
}
/* ===== 薄色の軽い数式強調 ===== */
.formula-light {
  background-color: #FAFDFF;
  padding: 0.2em 1em;
  font-size: 3rem;
  font-weight: bolder;
  margin: 10px 0;
}
/* 図表のラベルなどに使う装飾 */
.fig {
  background: linear-gradient(transparent 0%, #d4e8e8 0%);
  padding: 2px 5px;
  margin: 0 5px;
  border-radius: 5px;
}
/* 分数（fraction）全体のラッパー */
.fra {
  display: inline-block;
  vertical-align: middle;
  text-align: center;
  text-indent: 0;
}
/* 分子と分母の共通スタイル */
.fra_n, .fra_d {
  display: block;
  padding: 0 5px;
  margin: 0 2px;
  line-height: 130%;
}
/* 分子（numerator）だけ下線を引く */
.fra_n {
  border-bottom: 1px solid #333;
}
/* 分数などの横に配置する番号ラベルなどに */
.f-number {
  float: right;
  display: inline-block;
}
.chap-li-arrow {
  float: right;
  display: inline-block;
  padding-right: 20px;
}
/* ===== 灰色背景のリストなど ===== */
.list-gray {
  background-color: #f1f4f6;
  padding: 10px;
}
sup, sub {
  font-size: 70%;
  position: relative;
}
sup {
  top: -0.3em;
}
sub {
  bottom: -0.3em;
}
/*/////////////////////////////////////////////////
//ブログカードのレイアウト変更
/////////////////////////////////////////////////*/
.wp-embedded-content {
  margin: 0 auto;
  min-width: 100%;
  width: 100%;
  height: 100%;
}
/* マージン（上） */
.mt-10 {
  margin-top: 10px;
}
.mt-20 {
  margin-top: 20px;
}
.mt-30 {
  margin-top: 30px;
}
.mt-40 {
  margin-top: 40px;
}
.mt-60 {
  margin-top: 60px;
}
.mt-80 {
  margin-top: 80px;
}
.mt-120 {
  margin-top: 120px;
}
/* マージン（上：負） */
.mt--20 {
  margin-top: -20px;
}
.mt--50 {
  margin-top: -50px;
}
.mt--80 {
  margin-top: -80px;
}
/* マージン（下） */
.mb-10 {
  margin-bottom: 10px;
}
/* ===== 吹き出し全体のレイアウト ===== */
.balloon {
  display: flex;
  width: 100%;
  margin: 1.5em 0;
  overflow: hidden;
}
/* ===== 顔アイコン部分 ===== */
.faceicon {
  width: 20%;
}
.faceicon img {
  width: 100%;
  height: auto;
  border-radius: 50%;
}
/* ===== 吹き出し本文のエリア ===== */
.chatting {
  width: 90%;
}
/* ===== 吹き出し（会話） ===== */
.says {
  position: relative;
  display: inline-block;
  margin: 40px 0 0 30px;
  padding: 10px 20px;
  background: #e9f3f3;
  border-radius: 12px;
}
.says::after {
  content: "";
  position: absolute;
  top: 20px;
  left: -24px;
  border: 12px solid transparent;
  border-right-color: #e9f3f3;
}
/* ===== テキスト（段落） ===== */
.says p {
  margin: 0 !important;
  padding: 0;
  line-height: 3rem !important;
}
/* ── ナビ & トップバー ───────────────────────── */
/* PCナビ全体 */
.pc-nav {
  height: 70px;
}
/* ヘッダー固定バー */
.top-bar {
  position: relative;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 3px rgba(0, 0, 0, 0.16);
  z-index: 10000;
}
/* ヘッダー内配置 */
.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 100%;
  margin: 0 auto;
  padding: 8px 12px;
  height: 60px;
  box-sizing: border-box;
}
/* ロゴ（h1） */
.top-bar-inner h1 {
  display: flex;
  align-items: center;
  margin: 0;
  height: 100%;
}
.top-bar h1 img {
  display: block;
  max-height: 40px;
  height: auto;
  margin: 0;
  max-width: 100%;
}
/* グローバルナビ */
.top-bar_g-nav ul {
  display: flex;
  font-size: 1.6rem;
  font-weight: bold;
  padding-top: 25px;
  margin: 0;
  list-style: none;
}
.top-bar_g-nav li {
  text-align: center;
  margin-right: 50px;
}
/* ― Main Menu ― */
#mainmenu {
  position: relative;
  top: 15px;
  right: 30px;
}
#mainmenu p {
  margin-top: 26px;
  font-weight: 400;
  text-align: center;
  color: #515961
}
/* burger ──────────────────────── */
.menu-trigger, .menu-trigger span {
  display: inline-block;
  box-sizing: border-box;
  transition: .4s
}
.menu-trigger {
  width: 30px;
  height: 22px;
  background: none;
  border: none;
  cursor: pointer;
  appearance: none;
  z-index: 9999999;
  position: relative
}
.menu-trigger span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #000;
  border-radius: 2px
}
.menu-trigger span:nth-of-type(1) {
  top: 0
}
.menu-trigger span:nth-of-type(2) {
  top: 10px
}
.menu-trigger span:nth-of-type(3) {
  bottom: 0
}
/*  ─ active (×) state ─ */
.menu-trigger.active span:nth-of-type(1) {
  transform: translateY(10px) rotate(-45deg);
  background: #fff
}
.menu-trigger.active span:nth-of-type(2) {
  opacity: 0
}
.menu-trigger.active span:nth-of-type(3) {
  transform: translateY(-10px) rotate(45deg);
  background: #fff
}
/* drawer nav ───────────────────── */
.gblnv_block {
  line-height: 4.3rem;
  visibility: hidden
}
.gblnv_block ul {
  position: fixed;
  top: 0;
  padding: 50px 10px;
  width: 400px;
  max-width: 90%
}
.gblnv_block li {
  min-width: 100%;
  border-bottom: 1px solid #3E4953
}
.gblnv_block li:hover {
  opacity: .7
}
/*  ─ slide-in (visible) state ─ */
.gblnv_block.onanimation {
  top: 0;
  right: -50px;
  position: fixed;
  visibility: visible;
  width: 400px;
  max-width: 90%;
  height: 100%;
  background: #515961;
  font-size: 1.8rem;
  z-index: 999999;
  transform: translateX(-50px);
  transition: transform .3s
}
.gblnv_block.onanimation a {
  color: #fff;
  font-size: 1.6rem;
  font-weight: 300
}
/* ― Layout Wrappers ― */
[class^="wrapper-contents"] {
  margin: 0 auto
} /* 共通 */
.wrapper-contents {
  width: 980px
}
.wrapper-contents-wide {
  width: 1200px;
  max-width: 90%
}
.wrapper-contents-middle {
  width: 1090px;
  max-width: 95%
}
.wrapper-contents-narrow {
  width: 840px
}
/* ===== Global Footer ===== */
footer {
  background: #3B3E3E;
  color: #fff;
  padding-top: 80px;
  font: 1.6rem/2rem sans-serif;
}
footer h2 {
  margin-bottom: 30px
}
footer a {
  color: #DBDBDB
}
footer a:hover {
  color: #67EDE2
}
.img-footer {
  width: 200px
}
/* copy-right line */
.copy {
  text-align: center;
  font-size: 1.8rem;
  padding-bottom: 20px;
}
/* footer columns */
.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  line-height: 25px;
  margin-bottom: 50px;
}
.footer-inner i {
  margin-right: 10px
}
/* optional info block */
.mathematica-info {
  line-height: 3rem
}
/*──────────────── footer : SNS follow ───────────────*/
.footer-follow {
  height: 200px;
  padding: 30px 0;
  background: url("../img/follow-bg.jpg") center/cover no-repeat;
  font: 300 2.6rem/1 'Alegreya Sans SC', sans-serif;
  color: #fff;
  text-align: center;
  letter-spacing: .3rem;
}
.footer-follow-box {
  display: flex;
  justify-content: space-around;
  width: 80%;
  max-width: 460px;
  margin: 30px auto 0;
}
.footer-follow i {
  margin-right: 5px
}
.footer-follow-link {
  display: inline-block;
  padding: 10px 30px;
  color: #fff;
  border: 1px solid;
  text-align: center;
  transition: .5s;
}
.footer-follow-link:hover {
  background: #000;
  border-color: #000
}
/*─────────────── SNS-RSS bloc ───────────────*/
.sns-rss a {
  display: inline-block;
  margin: 20px 20px 0 0;
  font-size: 3rem;
}
.sns-rss p {
  margin-top: 20px
}
/*─────────────── Ad placeholder ───────────────*/
.ad {
  background: #fff;
  margin: 0 auto
}
/*─────────────── PAGE TOP button ───────────────*/
#page_top {
  position: fixed;
  right: -60px;
  bottom: 0;
  width: 60px;
  height: 60px;
  background: #21A6A0;
  opacity: .9;
}
#page_top a {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  text-decoration: none;
}
#page_top a::before {
  content: '\f0d8';
  font: 900 25px/35px 'Font Awesome 5 Free';
  color: #fff;
  position: absolute;
  inset: 0;
  margin: auto;
  text-align: center;
}
#page_top a::after {
  content: 'TOPへ';
  font-size: 13px;
  color: #fff;
  position: absolute;
  top: 40px;
  left: 0;
  right: 0;
  margin: auto;
  text-align: center;
}
/*────────────  Drop-down menu  ────────────*/
.dropmenu {
  margin-right: 20px;
  list-style: none;
}
.dropmenu::after {
  content: '';
  display: block;
  clear: both
}
/* 1st-level items */
.dropmenu > li {
  float: left;
  position: relative;
  text-align: center;
}
.dropmenu li > a { /* anchor reset (1st & 2nd level)   */
  display: block;
  margin: 0;
  line-height: 1;
  color: #333;
  text-decoration: none;
  font-weight: normal;
}
.dropmenu a:hover {
  color: #1CA99D
}
/* 2nd-level list */
.dropmenu ul {
  position: absolute;
  top: 100%; /* hidden by default */
  left: -30px;
  margin: 20px 0 0;
  padding: 10px;
  list-style: none;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 10px;
  box-shadow: 0 0 5px #ccc;
  opacity: 0;
  visibility: hidden;
  transition: .3s;
  z-index: 9999;
  width: auto; /* コンテンツに応じた幅に変更 */
  min-width: 200px;
  display: block;
}
.dropmenu ul li {
  width: 100%;
  padding: 10px;
  text-align: left;
}
/* hover → fade-in  */
.dropmenu li:hover > ul {
  top: 100%;
  opacity: 1;
  visibility: visible;
}
/* 旧仕様：fade-in id が付く場合の互換 */
#fade-in li:hover > ul {
  top: 100%;
  opacity: 1;
  visibility: visible
}
;
/*─────────────────────詳細ページ・共通────────────────────────── */
.child-wh {
  background-color: #ffffff;
  background-repeat: no-repeat;
  background-position: right top;
  background-attachment: fixed;
  z-index: 999999999999;
}
.child-about-inner {
  background-color: #fff;
  width: 1100px;
  margin: 0 auto;
  padding: 50px 0;
}
.child-dl h2 {
  font-size: 4.4rem;
}
.child-dl h3 {
  font-size: 1.6rem;
  line-height: 2.4rem;
}
.child-about-title {
  display: flex;
}
.btn-center {
  margin: 0 auto;
  display: block;
  text-align: center;
}
.com-breadcrumb-wrap {
  width: 100%;
  background-color: #fff;
  background: rgba(255, 255, 255, 0.5);
  font-family: 'Alegreya Sans SC', sans-serif;
  padding: 10px 0;
  border-bottom: 1px #E8EBEC solid;
}
.com-breadcrumb {
  font-size: 1.3rem;
  text-align: left;
}
.com-breadcrumb p {
  max-width: 980px;
  padding-left: 10px;
  margin: 0 auto;
}
.com-breadcrumb a:hover {
  color: #ff769a;
}
.ad-single-inner {
  width: 600px;
}
.key-child {
  min-height: 200px;
  background: rgba(223, 230, 240, 0.3);
}
.key-child-inner {
  display: flex;
  width: 1100px;
  margin: 0 auto;
  color: #363B40;
  padding-top: 120px;
}
.key-child-inner h2 {
  font-size: 4rem;
  margin-right: 20px;
}
.key-child-inner h3 {
  font-size: 1.8rem;
  line-height: 4rem;
}
.ver3-key-child {
  width: 1150px;
  margin: 0 auto 10px auto;
  color: #363B40;
  padding: 20px;
}
.ver3-com-breadcrumb-wrap {
  width: 100%;
  padding: 120px 0 0 0;
  font-size: 1.6rem;
}
.ver3-breadcrumb {
  font-size: 1.3rem;
  text-align: left;
  line-height: 2rem;
}
.ver3-breadcrumb i {
  margin-right: 5px;
}
.ver3-breadcrumb a:hover {
  color: #ff769a;
}
.ver3-key-child-inner {
  display: flex;
  color: #363B40;
  padding: 20px 0 30px 0;
}
.ver3-key-child-inner h2 {
  font-size: 3rem;
  margin-right: 20px;
}
.ver3-key-child-inner h3 {
  font-size: 1.8rem;
  line-height: 3rem;
}
/*---------------Table of Contents Plus の文字サイズを統一--------------*/
#toc_container {
  font-size: 18px !important;
  line-height: 1.8; /* 読みやすい行間 */
  margin: 20px auto 0;
}
#toc_container a {
  font-size: inherit !important; /* リンクも揃える */
}
/*-----------------topic---------------------*/
.topic {
  padding: 32px;
  border-radius: 8px;
  background-color: #f5f9fc;
  border: 1px solid #b0cde6;
  line-height: 3.2rem;
  font-size: 18px;
}
.topic ul {
  list-style-type: disc;
  padding-left: 1.5em;
  margin-top: 1em;
  margin-bottom: 1em;
  line-height: 1.8;
}
.topic ul li {
  margin-bottom: 0.5em;
}
.topic hr {
  border: none;
  border-top: 1px solid #cce0f5;
  margin: 1em 0;
}
/* 画像のレスポ対応 */
.img-respo {
  width: 75%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .img-respo {
    width: 100%;
  }
}
/*─────────────────────関連記事(rp4wp)────────────────────────── */
.rp4wp-related-posts {
  margin: 50px 0 120px 0;
  max-width: 840px;
  margin-left: auto;
  margin-right: auto;
  border-top: 1px #ccc dotted;
  border-bottom: 1px #ccc dotted;
}
.rp4wp-related-posts h3 {
  padding: 5px 5px 5px 15px;
  margin-bottom: 20px;
  font-size: 24px;
  font-weight: normal;
}
.rp4wp-related-posts h3:before {
  content: none;
}
.rp4wp-related-posts ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 3カラム */
  gap: 20px;
  padding: 0;
  list-style: none;
  margin-bottom: 80px;
}
.rp4wp-related-posts li {
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  padding: 8px;
  margin: 0;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border: 1px #ebebeb solid;
  transition: box-shadow 0.3s ease;
}
.rp4wp-related-posts li a {
  font-size: 16px;
  line-height: 140%;
  display: block;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: inherit;
  padding: 4px 0;
}
.rp4wp-related-posts li:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15); /* hover時に影を強調 */
  opacity: 1;
}
.rp4wp-related-post-image {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9の比率 */
  overflow: hidden;
  border-radius: 6px;
  background-color: #eee;
}
.rp4wp-related-post-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  margin: 0 !important;
}
.rp4wp-related-post-content {
  font-size: 1.6rem;
  line-height: 1.8rem;
  margin: 8px 8px 4px 8px; /* ← 上に少し余白、下に少し余白 */
}
/*-----------------ad---------------------*/
.article-ad {
  width: 700px;
  margin: 80px auto;
  padding: 5px;
  border: dotted #ccc 1px;
  max-width: 100%;
  min-height: 250px; /* cls改善のために以下を追加 */
  align-items: center;
  justify-content: center;
}
.article-ad p {
  text-align: center;
}
.article-ad a {
  text-align: center;
  display: block;
}
.adsbygoogle {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 250px; /* PCデフォルト用 */
  min-height: 250px;
}