@charset "UTF-8";

/*! destyle.css v3.0.2 | MIT License | https://github.com/nicolas-cusan/destyle.css */

/* Reset box-model and set borders */
/* ============================================ */

*,
::before,
::after {
  box-sizing: border-box;
  border-style: solid;
  border-width: 0;
}

/* Document */
/* ============================================ */

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 * 3. Remove gray overlay on links for iOS.
 */

html {
  line-height: 1.15; /* 1 */
  -webkit-text-size-adjust: 100%; /* 2 */
  -webkit-tap-highlight-color: transparent; /* 3*/
}

/* Sections */
/* ============================================ */

/**
 * Remove the margin in all browsers.
 */

body {
  margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */

main {
  display: block;
}

/* Vertical rhythm */
/* ============================================ */

p,
table,
blockquote,
address,
pre,
iframe,
form,
figure,
dl {
  margin: 0;
}

/* Headings */
/* ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
  margin: 0;
}

/* Lists (enumeration) */
/* ============================================ */

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Lists (definition) */
/* ============================================ */

dt {
  font-weight: bold;
}

dd {
  margin-left: 0;
}

/* Grouping content */
/* ============================================ */

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */

hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
  border-top-width: 1px;
  margin: 0;
  clear: both;
  color: inherit;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

pre {
  font-family: monospace, monospace; /* 1 */
  font-size: inherit; /* 2 */
}

address {
  font-style: inherit;
}

/* Text-level semantics */
/* ============================================ */

/**
 * Remove the gray background on active links in IE 10.
 */

a {
  background-color: transparent;
  text-decoration: none;
  color: inherit;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
  text-decoration: underline dotted; /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */

b,
strong {
  font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

code,
kbd,
samp {
  font-family: monospace, monospace; /* 1 */
  font-size: inherit; /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */

small {
  font-size: 75%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Replaced content */
/* ============================================ */

/**
 * Prevent vertical alignment issues.
 */

svg,
img,
embed,
object,
iframe {
  vertical-align: bottom;
}

/* Forms */
/* ============================================ */

/**
 * Reset form fields to make them styleable.
 * 1. Make form elements stylable across systems iOS especially.
 * 2. Inherit text-transform from parent.
 */

button,
input,
optgroup,
select,
textarea {
  -webkit-appearance: none; /* 1 */
  appearance: none;
  vertical-align: middle;
  color: inherit;
  font: inherit;
  background: transparent;
  padding: 0;
  margin: 0;
  border-radius: 0;
  text-align: inherit;
  text-transform: inherit; /* 2 */
}

/**
 * Reset radio and checkbox appearance to preserve their look in iOS.
 */

[type="checkbox"] {
  -webkit-appearance: checkbox;
  appearance: checkbox;
}

[type="radio"] {
  -webkit-appearance: radio;
  appearance: radio;
}

/**
 * Correct cursors for clickable elements.
 */

button,
[type="button"],
[type="reset"],
[type="submit"] {
  cursor: pointer;
}

button:disabled,
[type="button"]:disabled,
[type="reset"]:disabled,
[type="submit"]:disabled {
  cursor: default;
}

/**
 * Improve outlines for Firefox and unify style with input elements & buttons.
 */

:-moz-focusring {
  outline: auto;
}

select:disabled {
  opacity: inherit;
}

/**
 * Remove padding
 */

option {
  padding: 0;
}

/**
 * Reset to invisible
 */

fieldset {
  margin: 0;
  padding: 0;
  min-width: 0;
}

legend {
  padding: 0;
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */

progress {
  vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */

textarea {
  overflow: auto;
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * 1. Correct the outline style in Safari.
 */

[type="search"] {
  outline-offset: -2px; /* 1 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */

[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Fix font inheritance.
 */

::-webkit-file-upload-button {
  -webkit-appearance: button; /* 1 */
  font: inherit; /* 2 */
}

/**
 * Clickable labels
 */

label[for] {
  cursor: pointer;
}

/* Interactive */
/* ============================================ */

/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */

details {
  display: block;
}

/*
 * Add the correct display in all browsers.
 */

summary {
  display: list-item;
}

/*
 * Remove outline for editable content.
 */

[contenteditable]:focus {
  outline: auto;
}

/* Tables */
/* ============================================ */

/**
1. Correct table border color inheritance in all Chrome and Safari.
*/

table {
  border-color: inherit; /* 1 */
  border-collapse: collapse;
}

caption {
  text-align: left;
}

td,
th {
  vertical-align: top;
  padding: 0;
}

th {
  text-align: left;
  font-weight: bold;
}

/* ====================== common ====================== */

html {
	scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  font-optical-sizing: auto;
	font-weight: 400;
  font-style: normal;
	letter-spacing: 0.04em;
	font-feature-settings: "palt";
	line-height: 1;
	color: #282828;
	overflow-x: hidden;
}

.en {
	font-family: "Roboto", sans-serif;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  -webkit-transition: 0.2s;
  transition: 0.2s;
}
a:focus, a:hover {
  opacity: 0.5;
}

/* 左右余白 */
.inner {
	padding-left: 1rem;
	padding-right: 1rem;
}

/* 背景固定 */

.bg-fixed {
	background-image: url(../img/virenka-bg.webp);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
	-webkit-overflow-scrolling: touch;
}

/* ボタン */
.btn {
  display: block;
	box-shadow: -1.54px 1.29px 6px rgba(40, 40, 40, 0.4);
}

@media (min-width: 750px) {
	/* 左右余白 */
	.inner {
		padding-left: 2rem;
		padding-right: 2rem;
	}
}

/* ====================== header ====================== */

/* header 固定 */
.h-fixed {
	position: fixed;
  top: 0;
  left: 0;
	width: 100%;
	max-width: 750px;
	min-height: clamp(65px, 14.67vw, 120px);
	background-color: #fff;
  z-index: 999;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.header {
	display: grid;
	grid-template-columns: 1fr 1fr 2fr;
	align-items: center;
	gap: 0.75rem;
	padding-top: clamp(8px, 2.13vw, 16px);
	padding-bottom: clamp(8px, 2.13vw, 16px);
}


/* スクロールボタン */

.h_btn {
	position: relative;
  max-width: 290px;
	padding-top: clamp(8px, 2.13vw, 16px);
	padding-bottom: clamp(8px, 2.13vw, 16px);
	padding-right: 1rem;
	margin: 0 auto;
	background: linear-gradient(to bottom, #1581cc 0%, #0e579d 100%);
	color: #fff;
	border-radius: 32px;
  font-size: clamp(14px, 3.73vw, 26px);
	text-align: center;
  transition: .3s;
  z-index: 1;
}

.h_btn::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
	right: 16px;
  width: 0;
  height: 0;
  margin: auto;
	border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid #fff;
}

@media (min-width: 750px) {
	/* header 固定 */
  .h-fixed {
		max-width: 750px;
		height: 120px;
		left: 50%;
		transform: translateX(-50%);
  }
	.header {
		gap: 1.5rem;
	}
	/* スクロールボタン */
	.h_btn::after {
		right: 26px;
		border-left: 7px solid transparent;
  	border-right: 7px solid transparent;
  	border-top: 8px solid #fff;
	}
}

/* ====================== main ====================== */

.container {
  width: 100%;
  max-width: 750px;
  margin: 0 auto;
	padding-top: clamp(65px, 14.67vw, 120px);
	background-color: #fff;
	box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* 見出し */

.heading {
  font-weight: 700;
  font-size: clamp(20px, 4.53vw, 34px); /* 34 ÷ 750 = 0.0453 → 4.53vw */
	text-align: center;
	padding-bottom: clamp(28px, 7.47vw, 56px);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* 乳酸菌と腸脳相関について */

#return_lab {
	scroll-margin-top: clamp(65px, 16vw, 120px);
}

.check {
	position: relative;
}

.check::after {
	content: '';
	position: absolute;
	right: clamp(32px, 9.07vw, 68px);
	bottom: clamp(-28px, -2.73vw, -20px);
	transform: translate(100%, 100%);
	background-image: url(../img/virenka-icn_check.webp);
	background-repeat: no-repeat;
	background-size: contain;
	width: clamp(68px, 20.5vw, 154px);
	aspect-ratio: 154 / 64;
  z-index: 2;
}

.updown::after {
	animation-name: UpDown;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
  animation-direction: alternate;
}

@keyframes UpDown{
	0%{
		transform: translate(0);
	}
	100%{
		transform: translate(3px,3px);
	}
}

/* 購入方法 */

#buy {
	scroll-margin-top: clamp(65px, 16vw, 120px);
}

.buy_box {
	background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  width: 100%;
  position: relative;
}

.absolute {
	position: absolute;
	left: 50%;
	transform: translate(-50%,0);
	bottom: 24px;
	width: 100%;
	padding-left: clamp(24px, 9.2vw, 69px);
	padding-right: clamp(24px, 9.2vw, 69px);
}

.feature27 {
	background-image: url(../img/virenka-feature27.jpg);
	aspect-ratio: 750 / 302;
}

.feature28 {
	background-image: url(../img/virenka-feature28.jpg);
	aspect-ratio: 750 / 493;
}

.feature29 {
	background-image: url(../img/virenka-feature29.jpg);
	aspect-ratio: 750 / 493;
}

.feature30 {
	background-image: url(../img/virenka-feature30.jpg);
	aspect-ratio: 750 / 493;
}

.feature31-b {
	background-image: url(../img/virenka-feature31-b.jpg);
	aspect-ratio: 750 / 336;
}

/* 購入方法ボタン */

.buy_btn {
	position: relative;
	max-width: 612px;
	padding-top: clamp(12px, 3.2vw, 24px);
	padding-bottom: clamp(12px, 3.2vw, 24px);
	padding-right: 1rem;
	color: #fff;
	border-radius: clamp(12px, 3.2vw, 24px);
  font-size: clamp(24px, 6.13vw, 46px);
	font-weight: 600;
	text-align: center;
  z-index: 1;
}

.scale {
	animation-name: ScaleAnim;
	animation-duration: 1.6s;
	animation-iteration-count: infinite;
	animation-timing-function: ease-in-out;
	animation-direction: alternate;
}

@keyframes ScaleAnim {
  0%   { transform: scale(1); }
  10%  { transform: scale(1.05); }
	20%  { transform: scale(1); }
  100% { transform: scale(1); }
}

.buy_btn::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  right: 22px;
  width: 22px;
  height: 22px;
  margin: auto;
  border-radius: 50%;
  background-color: #fff;
	z-index: 1;
}

.buy_btn::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
	right: 26px;
  width: 0;
  height: 0;
  margin: auto;
	border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  z-index: 2;
}

.feature27 > div > .buy_btn::after {
		border-left: 10px solid #116bb4;
}

.feature28 > div > .buy_btn::after {
		border-left: 10px solid #ec8700;
}

.feature29 > div > .buy_btn::after {
		border-left: 10px solid #cc2643;
}

.feature30 > div > .buy_btn::after {
		border-left: 10px solid #008f03;
}

.feature31-b > div > .buy_btn::after {
		border-left: 10px solid #cc2643;
}

.feature27 > div > a {
	background: linear-gradient(to bottom, #1581cc 0%, #0e579d 100%);
}

.feature28 > div > a {
	background: linear-gradient(to bottom, #f2a200 0%, #e76d00 100%);
}

.feature29 > div > a {
	background: linear-gradient(to bottom, #dc2d51 0%, #be2038 100%);
}

.feature30 > div > a {
	background: linear-gradient(to bottom, #00ab04 0%, #007703 100%);
}

.feature31-b > div > a {
	background: linear-gradient(to bottom, #dc2d51 0%, #be2038 100%);
}

/* ご使用上の注意 */

.attention {
	padding-top: clamp(40px, 10.67vw, 80px);
  padding-bottom: clamp(52px, 13.87vw, 104px);
}

.attention > ul > li {
	font-size: clamp(14px, 3.46vw, 26px);
  line-height: 1.6;
	margin-bottom: 2.13vw;
}

.list::before {
	content: "・";
	margin-right: 0.5em;
}

.indent {
	text-indent: -1em;
	padding-left: 1em;
}

/* お問い合わせ */

.contact {
	padding-top: clamp(40px, 10.67vw, 80px);
  padding-bottom: clamp(32px, 8.53vw, 64px);
	background-color: #f3f3f3;
}

.contact > div {
	padding-bottom: clamp(28px, 7.47vw, 56px);
}

.contact > div > p {
	font-size: clamp(16px, 3.46vw, 26px);
  line-height: 1.6;
	text-align: center;
}

.contact_note {
	margin-top: 1rem;
	font-size: clamp(14px, 2.4vw, 18px)!important;
}

.contact ul > li {
	margin-bottom: 2.13vw;
}

.label p {
	font-size: clamp(16px, 3.47vw, 26px);
  line-height: 1;
	color: #8a8a8a;
}

.label {
  display: flex;
  align-items: center;
  gap: 0.5em;
	margin-bottom: clamp(6px, 1.6vw, 12px);
}

.haveto {
	background-color: #c7304c;
	color: #fff;
	font-size: clamp(14px, 2.67vw, 20px);
	line-height: 1;
  padding: 0.25rem;
	transform: translateY(1px);
}

.error {
	font-size: clamp(14px, 2.67vw, 20px)!important;
	color: #c7304c!important;
	margin-top: 0.5rem;
}

input,
textarea,
select,
button {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  box-sizing: border-box;
  padding: 0;
  margin: 0;
	outline: none;
}

input:focus, textarea:focus {
  outline: none;
  box-shadow: none;
}

input, textarea {
  width: 100%;
	max-width: 100%;
}

.form {
	font-size: clamp(16px, 3.47vw, 26px);
	line-height: 1.5;
}

.form > input, .form > textarea {
	padding: 0.5rem;
	background-color: #fff;
}

.form > input {
	min-height: 48px;
}

.form > textarea {
	min-height: 120px;
  resize: vertical;
}

/* お問い合わせボタン */

.btn_wrapper {
	display: flex;
  align-content: center;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.btn_wrapper > input {
	letter-spacing: 0.1em;
}

.form_btn {
  max-width: 290px;
  padding-top: clamp(8px, 2.13vw, 16px);
  padding-bottom: clamp(8px, 2.13vw, 16px);
	margin-top: clamp(16px, 4.27vw, 32px);
	background: linear-gradient(to bottom, #bacb0a 0%, #7e9b07 100%);
	color: #fff;
	border-radius: 32px;
  font-size: clamp(14px, 3.73vw, 26px);
	text-align: center;
  transition: .3s;
  z-index: 1;
}

.form_back_btn {
  max-width: 290px;
  padding-top: clamp(8px, 2.13vw, 16px);
  padding-bottom: clamp(8px, 2.13vw, 16px);
	margin-top: clamp(16px, 4.27vw, 32px);
	background: linear-gradient(to bottom, #aaa 0%, #828181 100%);
	color: #fff;
	border-radius: 32px;
  font-size: clamp(14px, 3.73vw, 26px);
	text-align: center;
  transition: .3s;
  z-index: 1;
}

/* よくある質問 */

.qanda {
	padding-top: clamp(40px, 10.67vw, 80px);
  padding-bottom: clamp(52px, 13.87vw, 104px);
}

.question {
	font-size: clamp(16px, 3.47vw, 26px);
  line-height: 1.6;
}

.answer {
	font-size: clamp(14px, 3.47vw, 26px);
  line-height: 1.6;
}

.question {
	padding-top: clamp(12px, 3.2vw, 24px);
	padding-bottom: clamp(12px, 3.2vw, 24px);
	background-color: #edf6ff;
	position: relative;
	padding-left: 3.5rem;
}

.question::before {
	content: '';
  display: inline-block;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(0,-50%);
	margin-left: 1rem;
  width: 30px;
  height: 31px;
  background-image: url(../img/virenka-icn_q.webp);
  background-repeat: no-repeat;
  background-size: contain;
}

.answer {
	padding-top: clamp(12px, 3.2vw, 24px);
	padding-bottom: clamp(24px, 6.4vw, 48px);
	position: relative;
	padding-left: 3.5rem;
}

.answer::before {
	content: '';
  display: inline-block;
  position: absolute;
  top: 0;
  left: 0;
	margin-left: 1rem;
	margin-top: clamp(12px, 3.2vw, 24px);
  width: 28px;
  height: 28px;
  background-image: url(../img/virenka-icn_a.webp);
  background-repeat: no-repeat;
  background-size: contain;
}

/* 情報 */

.info {
	padding-top: clamp(24px, 6.4vw, 48px);
	padding-bottom: clamp(24px, 6.4vw, 48px);
	background-color: #f3f3f3;
}

.info > ul > li > a {
	display: block;
	margin-bottom: 1.13vw;
	text-align: center;
	font-size: clamp(13px, 2.4vw, 18px);
  line-height: 1.6;
	color: #006cff;
	text-decoration: underline;
}

@media (min-width: 750px) {
	.container {
		padding-top: 120px;
	}

	/* 乳酸菌と腸脳相関について */
	@keyframes UpDown{
	0%{
		transform: translate(0);
	}
	100%{
		transform: translate(8px,8px);
	}
}

	/* 購入方法 ボタン */
	.buy_btn::before {
  	right: 21px;
	  width:  36px;
	  height: 36px;
	}

	.buy_btn::after {
  	right: 30px;
    border-top: 11px solid transparent;
    border-bottom: 11px solid transparent;
	}

	.feature27 > div > .buy_btn::after {
		border-left: 14px solid #116bb4;
	}

	.feature28 > div > .buy_btn::after {
		border-left: 14px solid #ec8700;
	}

	.feature29 > div > .buy_btn::after {
		border-left: 14px solid #cc2643;
	}

	.feature30 > div > .buy_btn::after {
		border-left: 14px solid #008f03;
	}

	/* よくある質問 */
	.question {
		padding-left: 5rem;
	}

	.question::before {
		margin-left: 2rem;
	}

	.answer {
		padding-left: 5rem;
	}

	.answer::before {
		margin-left: 2rem;
		transform: translateY(6px);
	}

	/* お問い合わせ ボタン */
	.form_btn::after {
		right: 26px;
		border-top: 13px solid transparent;
		border-right: 0 solid transparent;
		border-left: 16px solid #fff;
		border-bottom: 13px solid transparent;
	}
}

/* ====================== footer ====================== */

.footer {
	width: 100%;
  max-width: 750px;
  margin: 0 auto;
	box-shadow: 0 2px 6px rgba(0,0,0,0.1);
	padding-top: clamp(8px, 2.13vw, 16px);
  padding-bottom: clamp(8px, 2.13vw, 16px);
	background-color: #3e82c3;
}

.footer > p {
	text-align: center;
	font-size: clamp(12px, 1.87vw, 14px);
	line-height: 1.6;
	color: #fff;
	letter-spacing: initial;
}

/* ====================== info.html ====================== */
/* ====================== lactic_acid_bacteria.html ====================== */

/* sub_header */
.sub_header {
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 0.75rem;
	padding-top: clamp(8px, 2.13vw, 16px);
	padding-bottom: clamp(8px, 2.13vw, 16px);
}

@media (min-width: 750px) {
	.sub_header {
		gap: 1.5rem;
	}
}

/* main */

#info > .container > section {
	margin-top: clamp(40px, 14.93vw, 112px);
	scroll-margin-top: clamp(80px, 21.33vw, 160px);
}

#info > .container > section:not(:last-of-type) {
	margin-top: clamp(24px, 5.33vw, 40px);
}

@media (min-width: 750px) {
	#info > .container > section {
		scroll-margin-top: 160px;
	}
}

/* 見出し */

.heading_h3 {
	padding-bottom: clamp(24px, 5.33vw, 40px);
  font-size: clamp(20px, 4.53vw, 34px); /* 34 ÷ 750 = 0.0453 → 4.53vw */
	font-weight: 700;
	text-align: center;
}

.heading_h4 {
	padding-bottom: clamp(12px, 2.13vw, 16px);
	font-size: clamp(16px, 3.46vw, 26px);
	font-weight: 600;
}

/* 本文 */
#info > .container > section > ul {
	line-height: 1.6;
	font-size: clamp(16px, 3.46vw, 26px);
}

/* 余白 */

.margin {
	margin-bottom: clamp(24px, 6.4vw, 48px);
}

/* 送料について */

.nekopos {
	margin-bottom: clamp(12px, 2.13vw, 16px);
}

.postage {
	border: 1px solid #aeaeae;
	padding: 1rem;
}

.postage > dt {
	background-color: #282828;
	border-radius: 12px;
	padding: 0.25rem;
	margin-bottom: clamp(1rem, 1.33vw, 1.5rem);
	text-align: center;
	font-weight: 600;
	color: #fff;
}

.postage > dd:nth-of-type(even) {
	background-color: #eee;
}

.grid {
	display: grid;
	grid-template-columns: 1fr clamp(56px, 12vw, 90px);
	padding: 0 0.5rem;
	gap: 1rem;
}

.grid > li {
	padding: 0.25rem 0;
}

/* 戻るボタン */

.back {
	padding-top: clamp(40px, 10.67vw, 80px);
  padding-bottom: clamp(40px, 10.67vw, 80px);
}

.back_btn {
	position: relative;
  max-width: 290px;
	padding-top: clamp(8px, 2.13vw, 16px);
	padding-bottom: clamp(8px, 2.13vw, 16px);
	margin: 0 auto;
	background: linear-gradient(to bottom, #1581cc 0%, #0e579d 100%);
	color: #fff;
	border-radius: 32px;
  font-size: clamp(14px, 3.73vw, 26px);
	text-align: center;
  transition: .3s;
  z-index: 1;
}

.back_btn::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
	left: 16px;
  width: 0;
  height: 0;
  margin: auto;
	border-right: 6px solid #fff;
  border-bottom: 5px solid transparent;
  border-top: 5px solid transparent;
}

@media (min-width: 750px) {
	/* 戻るボタン */
	.back_btn::after {
		left: 26px;
		border-right: 8px solid #fff;
  	border-bottom: 7px solid transparent;
  	border-top: 7px solid transparent;
	}
}