@charset "UTF-8";
footer {
  background-color: #2F2F2F;
  text-align: center;
  padding-top: 40px;
  padding-bottom: 40px;
}
footer small {
  color: #FFF;
}

/*使用カラーの定義、呼び出しは variables.$〇〇〇*/
/* グラデーション */
/*ガラス風*/
/*ホバー時のグラデーション枠線*/
.header {
  max-width: 1170px;
  width: 90%;
  position: fixed;
  z-index: 100;
  margin: auto;
  top: 3rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 1000px;
  backdrop-filter: blur(10px);
  padding: 2rem 3.5rem;
}
@media only screen and (max-width: 767px) {
  .header {
    padding: 0.6rem 0;
  }
}
.header .wrapper_inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
@media only screen and (max-width: 767px) {
  .header .wrapper_inner {
    max-width: none;
  }
}
.header h1 {
  font-family: "Hanken Grotesk", sans-serif;
  font-size: 21px;
  font-weight: 700;
}
@media only screen and (max-width: 767px) {
  .header h1 {
    font-size: 1.6rem;
  }
}
.header ul {
  display: flex;
  font-size: 2rem;
}
@media only screen and (max-width: 767px) {
  .header ul {
    font-size: 1.3rem;
  }
}
.header ul li {
  list-style: none;
}
.header ul li:not(:last-of-type) {
  list-style: none;
  margin-right: 3rem;
}
@media only screen and (max-width: 767px) {
  .header ul li:not(:last-of-type) {
    margin-right: 1.6rem;
  }
}
.header ul a {
  position: relative;
  opacity: 1;
  transition: opacity 0.3s ease;
}
.header ul a:hover {
  opacity: 0.6;
}
.header ul a::after {
  position: absolute;
  left: 0;
}
.header ul a:hover::after {
  transform: scale(1, 1); /*ホバー後、x軸方向に1（相対値）伸長*/
}

/* スマホ用ハンバーガー */
.hamburger-menu__wrap {
  width: 100%;
  height: 68px;
  margin: 0 auto;
  position: fixed;
  top: 0;
  right: 0;
  background-color: rgba(241, 241, 241, 0.3490196078);
  box-shadow: 2px 2px 10px 2px rgba(198, 198, 198, 0.4);
}
.hamburger-menu__wrap h1 {
  font-family: "Hanken Grotesk", sans-serif;
  font-size: 21px;
  font-weight: 700;
  position: fixed;
  top: 18px;
  left: 10px;
}

.menu-btn {
  position: fixed;
  top: 10px;
  right: 0;
  display: flex;
  height: 48px;
  width: 48px;
  justify-content: center;
  align-items: center;
  z-index: 90;
}

.menu-btn span,
.menu-btn span:before,
.menu-btn span:after {
  content: "";
  display: block;
  height: 1px;
  width: 25px;
  border-radius: 3px;
  background-color: #2F2F2F;
  position: absolute;
}

.menu-btn span:before {
  bottom: 8px;
}

.menu-btn span:after {
  top: 8px;
}

/* ボタンタップで開閉 */
#menu-btn-check:checked ~ .menu-btn span {
  background-color: rgba(255, 255, 255, 0); /*メニューオープン時は真ん中の線を透明にする*/
}

#menu-btn-check:checked ~ .menu-btn span::before {
  background-color: #FFF;
  bottom: 0;
  transform: rotate(45deg);
}

#menu-btn-check:checked ~ .menu-btn span::after {
  background-color: #FFF;
  top: 0;
  transform: rotate(-45deg);
}

#menu-btn-check {
  display: none;
}

/* メニュー部分装飾 */
.menu-content {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 100%; /*leftの値を変更してメニューを画面外へ*/
  z-index: 80;
  background-color: #2F2F2F;
  transition: all 0.5s; /*アニメーション設定*/
}

.menu-content ul {
  padding: 70px 10px 0;
}

.menu-content ul li {
  border-bottom: solid 1px #ffffff;
  list-style: none;
}

.menu-content ul li a {
  display: block;
  width: 100%;
  font-size: 15px;
  box-sizing: border-box;
  color: #ffffff;
  text-decoration: none;
  padding: 9px 15px 10px 0;
  position: relative;
}

.menu-content ul li a::before {
  content: "";
  width: 7px;
  height: 7px;
  border-top: solid 2px #ffffff;
  border-right: solid 2px #ffffff;
  transform: rotate(45deg);
  position: absolute;
  right: 11px;
  top: 16px;
}

/* ボタンタップでメニューを表示 */
#menu-btn-check:checked ~ .menu-content {
  left: 0; /*メニューを画面内へ*/
}

/* ハンバーガーメニュー展開時、背景を固定 */
body.active {
  height: 100%;
  overflow: hidden;
}

/* ページ全体フェード */
body {
  opacity: 0;
  transition: opacity 0.5s ease;
}

body.is-show {
  opacity: 1;
}

body.is-hide {
  opacity: 0;
}

/*部分フェード*/
/* 初期状態：透明・少し下にずらす */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

/* 画面内に入ったら表示 */
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html {
  font-size: 62.5%;
}
@media screen and (max-width: 1440px) {
  html {
    font-size: 0.694447vw;
  }
}
@media only screen and (max-width: 767px) {
  html {
    font-size: 2.6666666667vw;
  }
}

body {
  color: #2F2F2F;
  font-family: "Hanken Grotesk", sans-serif;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
  font-size: 1.6rem;
  letter-spacing: 0.05rem;
  font-weight: 400;
  animation: fadeIn 1s ease-in-out 0s forwards;
}
@media only screen and (max-width: 767px) {
  body {
    font-size: 1.5rem;
  }
}

html, body {
  overflow-x: clip;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  image-rendering: -webkit-optimize-contrast;
}

a {
  color: #2F2F2F;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent; /* 強調をなくす */
}

p {
  line-height: 3.4rem;
  letter-spacing: 0.2rem;
}
@media only screen and (max-width: 767px) {
  p {
    line-height: 2.8rem;
    font-size: 1.5rem;
  }
}

.js-accordion-container {
  transition: max-height 0.6s cubic-bezier(0.785, 0.135, 0.15, 0.86);
  max-height: 0;
  overflow: hidden;
}

.sp-accordion-container {
  transition: max-height 1s cubic-bezier(0.785, 0.135, 0.15, 0.86);
}
@media only screen and (max-width: 767px) {
  .sp-accordion-container {
    max-height: 0;
    overflow: hidden;
  }
}

picture {
  display: block;
}
picture.lazy, picture.cover {
  position: relative;
  overflow: hidden;
  transform: translate3d(0, 0, 0);
}
picture.lazy img, picture.cover img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(1);
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  opacity: 0;
  transition: opacity 0.2s ease-in;
}
picture.lazy.zoomOut img, picture.cover.zoomOut img {
  transform: translate(-50%, -50%) scale(1.08);
  transition: transform 1.3s cubic-bezier(0.215, 0.61, 0.355, 1), opacity 0.4s ease-in;
}
picture.lazy.loaded:not(.zoomOut) img, picture.cover.loaded:not(.zoomOut) img {
  opacity: 1;
}
picture.lazy.inView.loaded.zoomOut img, picture.cover.inView.loaded.zoomOut img {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.show_sp {
  display: none;
}
@media only screen and (max-width: 767px) {
  .show_sp {
    display: block;
  }
}

.show_pc {
  display: block;
}
@media only screen and (max-width: 767px) {
  .show_pc {
    display: none;
  }
}

.ff-jp {
  font-family: "Noto Sans JP", sans-serif;
}

.border-gray {
  border: 1px solid rgba(51, 51, 51, 0.1);
}

svg {
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-transform: translate3d(0, 0, 0);
  will-change: transform;
}

.wrapper {
  max-width: 112.4rem;
  margin: 0 auto;
}
@media only screen and (max-width: 767px) {
  .wrapper {
    max-width: 100%;
    margin: 0 2.5rem;
  }
}

/*!
* ress.css • v1.1.2
* MIT License
* github.com/filipelinhares/ress
*/
/* # =================================================================
# Global selectors
# ================================================================= */
html {
  box-sizing: border-box;
  /* All browsers without overlaying scrollbars */
  -webkit-text-size-adjust: 100%;
  /* iOS 8+ */
}

*,
::before,
::after {
  box-sizing: border-box;
}

::before,
::after {
  text-decoration: inherit;
  /* Inherit text-decoration and vertical align to ::before and ::after pseudo elements */
  vertical-align: inherit;
}

/* Remove margin, padding of all elements and set background-no-repeat as default */
* {
  background-repeat: no-repeat;
  /* Set `background-repeat: no-repeat` to all elements */
  padding: 0;
  /* Reset `padding` and `margin` of all elements */
  margin: 0;
}

/* # =================================================================
# General elements
# ================================================================= */
/* Add the correct display in iOS 4-7.*/
audio:not([controls]) {
  display: none;
  height: 0;
}

hr {
  overflow: visible;
  /* Show the overflow in Edge and IE */
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: 100%;
  font-style: normal;
  font-weight: normal;
}

/*
* Correct `block` display not defined for any HTML5 element in IE 8/9
* Correct `block` display not defined for `details` or `summary` in IE 10/11
* and Firefox
* Correct `block` display not defined for `main` in IE 11
*/
article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
menu,
nav,
section,
summary {
  display: block;
}

summary {
  display: list-item;
  /* Add the correct display in all browsers */
}

small {
  font-size: 100%;
  /* Set font-size to 80% in `small` elements */
}

[hidden],
template {
  display: none;
  /* Add the correct display in IE */
}

abbr[title] {
  border-bottom: 1px dotted;
  /* Add a bordered underline effect in all browsers */
  text-decoration: none;
  /* Remove text decoration in Firefox 40+ */
}

a {
  background-color: transparent;
  /* Remove the gray background on active links in IE 10 */
  -webkit-text-decoration-skip: objects;
  /* Remove gaps in links underline in iOS 8+ and Safari 8+ */
}

a:active,
a:hover {
  outline-width: 0;
  /* Remove the outline when hovering in all browsers */
}

code,
kbd,
pre,
samp {
  font-family: monospace, monospace;
  /* Specify the font family of code elements */
}

b,
strong {
  font-weight: bolder;
  /* Correct style set to `bold` in Edge 12+, Safari 6.2+, and Chrome 18+ */
}

dfn {
  font-style: italic;
  /* Address styling not present in Safari and Chrome */
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Address styling not present in IE 8/9 */
mark {
  background-color: #ff0;
  color: #000;
}

/* https://gist.github.com/unruthless/413930 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

address,
em {
  font-style: normal;
}

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
  rt:not(:target) {
    position: relative;
    top: -0.7em;
    /* IE10（\9なしでIE11にも適用） */
  }
}
/* # =================================================================
# Forms
# ================================================================= */
input {
  border-radius: 0;
}

/* Apply cursor pointer to button elements */
button,
[type=button],
[type=reset],
[type=submit],
[role=button] {
  cursor: pointer;
}

/* Replace pointer cursor in disabled elements */
[disabled] {
  cursor: default;
}

[type=number] {
  width: auto;
  /* Firefox 36+ */
}

[type=search] {
  -webkit-appearance: textfield;
  /* Safari 8+ */
}

[type=search]::-webkit-search-cancel-button,
[type=search]::-webkit-search-decoration {
  -webkit-appearance: none;
  /* Safari 8 */
}

textarea {
  overflow: auto;
  /* Internet Explorer 11+ */
  resize: vertical;
  /* Specify textarea resizability */
}

button,
input,
optgroup,
select,
textarea {
  font: inherit;
  /* Specify font inheritance of form elements */
}

optgroup {
  font-weight: bold;
  /* Restore the font weight unset by the previous rule. */
}

button {
  overflow: visible;
  /* Address `overflow` set to `hidden` in IE 8/9/10/11 */
}

/* Remove inner padding and border in Firefox 4+ */
button::-moz-focus-inner,
[type=button]::-moz-focus-inner,
[type=reset]::-moz-focus-inner,
[type=submit]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

/* Replace focus style removed in the border reset above */
button:-moz-focusring,
[type=button]::-moz-focus-inner,
[type=reset]::-moz-focus-inner,
[type=submit]::-moz-focus-inner {
  outline: 1px dotted ButtonText;
}

button,
html [type=button],
[type=reset],
[type=submit] {
  -webkit-appearance: button;
  /* Correct the inability to style clickable types in iOS */
}

button,
select {
  text-transform: none;
  /* Firefox 40+, Internet Explorer 11- */
}

/* Remove the default button styling in all browsers */
button,
input,
select,
textarea {
  background-color: transparent;
  border-style: none;
  color: inherit;
}

/* Style select like a standard input */
select {
  -moz-appearance: none;
  /* Firefox 36+ */
  -webkit-appearance: none;
  /* Chrome 41+ */
}

select::-ms-expand {
  display: none;
  /* Internet Explorer 11+ */
}

select::-ms-value {
  color: currentColor;
  /* Internet Explorer 11+ */
}

legend {
  border: 0;
  /* Correct `color` not being inherited in IE 8/9/10/11 */
  color: inherit;
  /* Correct the color inheritance from `fieldset` elements in IE */
  display: table;
  /* Correct the text wrapping in Edge and IE */
  max-width: 100%;
  /* Correct the text wrapping in Edge and IE */
  white-space: normal;
  /* Correct the text wrapping in Edge and IE */
}

::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* Correct the inability to style clickable types in iOS and Safari */
  font: inherit;
  /* Change font properties to `inherit` in Chrome and Safari */
}

[type=search] {
  -webkit-appearance: textfield;
  /* Correct the odd appearance in Chrome and Safari */
  outline-offset: -2px;
  /* Correct the outline style in Safari */
}

/* # =================================================================
# Specify media element style
# ================================================================= */
img {
  max-width: 100%;
  border-style: none;
  /* Remove border when inside `a` element in IE 8/9/10 */
  vertical-align: bottom;
}

/* Add the correct vertical alignment in Chrome, Firefox, and Opera */
progress {
  vertical-align: baseline;
}

svg:not(:root) {
  overflow: hidden;
  /* Internet Explorer 11- */
}

audio,
canvas,
progress,
video {
  display: inline-block;
  /* Internet Explorer 11+, Windows Phone 8.1+ */
}

/* # =================================================================
# Accessibility
# ================================================================= */
/* Specify the progress cursor of updating elements */
[aria-busy=true] {
  cursor: progress;
}

/* Specify the pointer cursor of trigger elements */
[aria-controls] {
  cursor: pointer;
}

/* Specify the unstyled cursor of disabled, not-editable, or otherwise inoperable elements */
[aria-disabled] {
  cursor: default;
}

/* # =================================================================
# Selection
# ================================================================= */
/* Specify text selection background color and omit drop shadow */
::-moz-selection {
  background-color: #b3d4fc;
  /* Required when declaring ::selection */
  color: #000;
  text-shadow: none;
}

::selection {
  background-color: #b3d4fc;
  /* Required when declaring ::selection */
  color: #000;
  text-shadow: none;
}

a {
  text-decoration: none;
}
a:hover {
  text-decoration: none;
}

ul {
  letter-spacing: -0.4em;
}
ul li {
  letter-spacing: normal;
}

html {
  background-color: #FDF8EB;
  font-family: "Hanken Grotesk", sans-serif;
}

.wrapper {
  max-width: 112.4rem;
  margin: 0 auto;
}

.wrapper_inner {
  max-width: 1170px;
  margin: 0 auto;
}
@media screen and (max-width: 1200px) {
  .wrapper_inner {
    max-width: 90%;
  }
}
@media only screen and (max-width: 767px) {
  .wrapper_inner {
    max-width: 90%;
    margin: 0 2.5rem;
  }
}

.hero {
  margin: 7.5rem auto;
  margin-top: 14rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}
@media only screen and (max-width: 767px) {
  .hero {
    align-items: flex-start;
    flex-direction: column-reverse;
    margin-top: 12rem;
  }
}
.hero h1 {
  font-size: 9.9rem;
  font-weight: bold;
  line-height: 1;
  color: #2F2F2F;
}
@media only screen and (max-width: 767px) {
  .hero h1 {
    font-size: 5.9rem;
    margin-top: 1rem;
  }
}
.hero h1 span {
  background: linear-gradient(180deg, #2F2F2F, #959595);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 3.2rem;
  color: #94D2BD;
  margin-left: 0.7rem;
}
@media only screen and (max-width: 767px) {
  .hero p {
    font-size: 1.9rem;
    margin-left: 0.3rem;
  }
}
.hero__container {
  margin-right: 2rem;
}
@media only screen and (max-width: 767px) {
  .hero__container {
    margin-right: 0;
  }
}
.hero__img {
  width: 45%;
}
@media only screen and (max-width: 767px) {
  .hero__img {
    width: 100%;
  }
}

.bg-round {
  background-color: #005F73;
  border-radius: 20px 20px 0 0;
  padding: 7.5rem 0 10.5rem 0;
}

.bg-round__cream {
  background-color: #FDF8EB;
  border-radius: 20px 20px 0 0;
  padding: 7.5rem 0;
  margin-top: -15px;
}

.works__container {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 2rem;
}
@media only screen and (max-width: 767px) {
  .works__container {
    flex-direction: column;
  }
}
.works h2 {
  font-size: 5rem;
  font-weight: bold;
  color: #ffffff;
  margin-bottom: 3.5rem;
}
@media only screen and (max-width: 767px) {
  .works h2 {
    font-size: 2.5rem;
  }
}
.works h3 {
  font-size: 1.6rem;
  font-weight: bold;
  color: #ffffff;
}
.works__body {
  width: calc((100% - 4rem) / 3);
  overflow: hidden;
}
@media only screen and (max-width: 767px) {
  .works__body {
    width: 100%;
  }
}
.works__body {
  /* ラッパー */
}
.works__body > div {
  overflow: hidden;
}
.works {
  /* 画像ラッパー */
}
.works__thumb {
  overflow: hidden;
  margin-bottom: 1rem;
}
.works__img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(100%);
  transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1), filter 0.5s ease;
  transform-origin: center center;
}
.works__body:hover .works__img {
  transform: scale(1.04);
  filter: grayscale(0%);
}
.works__body:hover h3 {
  opacity: 1;
}
.works .role {
  width: 100%;
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.works .role span {
  font-size: 1rem;
  color: #ffffff;
  border: 0.5px solid #ffffff;
  border-radius: 1000px;
  padding: 0.5rem 1rem;
}

/* テキスト：opacity 変化 */
.role,
.works__body h3 {
  opacity: 1;
  transition: opacity 0.3s ease;
}

.works__body:hover .role,
.works__body:hover h3 {
  opacity: 0.7;
}

.about h2 {
  font-size: 5rem;
  font-weight: bold;
  color: #2F2F2F;
  margin-bottom: 3.5rem;
}
@media only screen and (max-width: 767px) {
  .about h2 {
    font-size: 2.5rem;
  }
}

.profile {
  display: flex;
  border: 1px solid #2F2F2F;
  border-radius: 50px;
  padding: 5rem;
}
@media only screen and (max-width: 767px) {
  .profile {
    flex-direction: column;
    padding: 3.5rem;
    margin: 0 10px;
  }
}
.profile__txt {
  max-width: 60%;
}
@media only screen and (max-width: 767px) {
  .profile__txt {
    max-width: 100%;
  }
}
.profile__txt h3 {
  font-size: 2.2rem;
  font-weight: bold;
  margin-bottom: 2.5rem;
}
.profile__txt p {
  font-size: 1.6rem;
}
.profile img {
  width: 40%;
  -o-object-fit: cover;
     object-fit: cover;
  border-radius: 30px;
  margin-right: 5rem;
}
@media only screen and (max-width: 767px) {
  .profile img {
    width: 100%;
    margin-right: 0;
    margin-bottom: 3rem;
  }
}
.profile .x-logo {
  width: 2.5rem;
  height: auto;
  border-radius: 0;
  margin-top: 1rem;
}

.mt-10 {
  margin-top: -10rem;
}

.bg-black {
  background-color: #005F73;
}

.works-detail {
  padding: 15rem 0 7.5rem 0;
}
.works-detail_ttl span {
  color: #94D2BD;
  font-size: 2rem;
}
@media only screen and (max-width: 767px) {
  .works-detail_ttl span {
    font-size: 1rem;
  }
}
.works-detail_ttl h2 {
  font-family: "Hanken Grotesk", sans-serif;
  font-size: 2.5rem;
  font-weight: bold;
  text-align: left;
  margin-bottom: 3rem;
}
@media only screen and (max-width: 767px) {
  .works-detail_ttl h2 {
    font-size: 1.5rem;
  }
}
.works-detail_img {
  width: 100%;
  margin: auto;
}
.works-detail_txt {
  padding-top: calc(10rem + 80px);
  padding-bottom: 5rem;
  color: #ffffff;
}
.works-detail_txt p {
  font-size: 2rem;
  margin-bottom: 3rem;
  line-height: 1.2;
}
@media only screen and (max-width: 767px) {
  .works-detail_txt p {
    font-size: 1.5rem;
  }
}
.works-detail__link {
  color: #ffffff;
}
.works-detail table {
  font-size: 18px;
}
@media only screen and (max-width: 767px) {
  .works-detail table {
    display: block;
    width: 100%;
  }
}
.works-detail table tr {
  text-align: left;
  vertical-align: top;
}
@media only screen and (max-width: 767px) {
  .works-detail table tr {
    display: block;
    width: 100%;
    margin-bottom: 2rem;
  }
}
.works-detail table th {
  white-space: nowrap;
  width: 16.5rem;
  padding-right: 1.5rem;
  padding-bottom: 1rem;
}
@media only screen and (max-width: 767px) {
  .works-detail table th {
    display: block;
    width: 100%;
    padding-bottom: 0.3rem;
  }
}
.works-detail table td {
  padding-bottom: 1rem;
  word-break: break-word;
}
@media only screen and (max-width: 767px) {
  .works-detail table td {
    display: block;
    width: 100%;
    line-height: 1.2;
  }
}
.works-detail_item {
  margin-top: 100px;
  margin-bottom: 100px;
}
.works-detail_item table {
  margin-bottom: 100px;
}
.works-detail_item--img {
  display: flex;
  justify-content: space-between;
}
.works-detail_item--img img {
  width: 48%;
  height: 100%;
  box-shadow: 2px 2px 10px 2px rgba(198, 198, 198, 0.4);
}

.btn_top {
  display: flex;
  justify-content: center;
  margin: 7rem 0;
}
.btn_top button {
  cursor: pointer;
  font-weight: bold;
  background-color: #94D2BD;
  border: 0px;
  border-radius: 49px;
  color: #ffffff;
  padding: 24px 48px;
  width: 210px;
  opacity: 1;
  transition: opacity 0.3s ease;
}
@media only screen and (max-width: 767px) {
  .btn_top button {
    display: block;
    width: 100%;
  }
}
.btn_top button:hover {
  opacity: 0.7;
}