:root {
    --color_dark_theme: black;
    --color_theme: white;
    --color_text: #000;
    --color_hover_text: black;
    --color_background_main: rgba(0, 0, 0, .02);
}

.theme {
    --color_dark_theme: white;
    --color_theme: rgba(0,0,0,.85);
    --color_text: white;
    --color_background_main: rgba(255, 255, 255, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}

body {
    font-family: Muli, sans-serif;
    letter-spacing: .1rem;
    background: var(--color_theme);
    transition: .3s;
}

body::before {
    content: '';
    display: block;
    width: 100%;
    height: 7.5rem;
}

.container {
    height: 100%;
    width: min(100% - 20px, 111rem);
    margin-inline: auto;
}

.set_main_item {
    padding-top: 7.5rem;
}

/* nav start */
nav {
    --opacity_background_hover: 0;
    --visibility_background_hover: hidden;
    width: 100dvw;
    height: 7.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: white;
    user-select: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, .08);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}

nav::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(0, 0, 0, .3);
    width: 100dvw;
    opacity: var(--opacity_background_hover);
    height: 100dvh;
    transition: .3s;
    z-index: -1;
    visibility: var(--visibility_background_hover);
}

.l_logo {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  text-decoration: none;
  color: linear-gradient(rgb(91, 36, 122) 0%, rgb(27, 206, 223) 100%);
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-size: 1.7rem;
  z-index: 1;
  margin-left: 2rem;
  user-select: none;
}
.l_logo a h1:active{
    color: linear-gradient(rgb(91, 36, 122) 0%, rgb(27, 206, 223) 100%);
}
.l_logo img {
    width: 5rem;
    height: 67%;
}

.l_logo h1 {
    margin-left: -.6rem;
    margin-top: -.2rem;
    z-index: 0;
}

.nav {
    /* margin-right: 4.3025rem; */
    display: flex;
    align-items: center;
    height: 100%;
}

.nav .pc {
    list-style: none;
    font-size: 1.8rem;
    font-weight: 500;
    display: flex;
    height: 100%;
    align-items: center;
    margin-right: 3rem;
    padding: .5rem 1.5rem;
    letter-spacing: .08rem;
    position: relative;
    cursor: pointer;
    background: white;
    scrollbar-width: auto;
}

.nav .pc:first-child::before {
    display: none;
    content: '';
    position: absolute;
    bottom: 0;
    right: 100%;
    width: 100%;
    height: 3rem;
    background: rgba(0, 0, 0, 0);
}

.nav .pc::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: .35rem;
    background: black;
    transition: .2s;
}

.nav .pc ._iconNav {
    width: .8rem;
    height: .8rem;
    border-left: .2rem solid var(--color_hover_text);
    border-bottom: .2rem solid var(--color_hover_text);
    transform: rotate(-45deg);
    margin-top: -.15rem;
    transition: .2s;
}

.nav .l_search {
    height: unset;
    padding: 0;
    position: relative;
}

.nav .l_search .l_search_icon {
    width: 4rem;
    height: 4rem;
    position: relative;
}

.nav .l_search .l_search_icon::before {
    content: '';
    width: 1.5rem;
    height: 1.5rem;
    border: .2rem solid black;
    position: absolute;
    top: 18%;
    left: 19%;
    border-radius: 100%;
}

.nav .l_search .l_search_icon::after {
    content: '';
    position: absolute;
    top: 65%;
    left: 53%;
    width: 1.2rem;
    height: .2rem;
    background: black;
    transform: rotate(45deg);
}

.nav .l_search::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.nav .l_search:hover::before {
    border: .1rem dashed black;
}

.nav .pc a {
    text-decoration: none;
}

.nav .pc p {
    color: var(--color_hover_text);
    margin-right: .8rem;
    cursor: pointer;
}

.nav .pc:hover {
    --color_hover_text: rgba(0, 0, 0, 0.5);
}

.nav :where(li:nth-child(1),
    li:nth-child(2),
    li:nth-child(3)):hover::after {
    width: 100%;
}

.nav .pc:hover ._iconNav {
    transform: rotate(-225deg);
}

.nav .pc:last-child {
    padding: .8rem 2rem;
    border: 1px solid var(--color_hover_text);
    border-radius: 2rem;
    overflow: hidden;
    position: relative;
    z-index: 1;
    height: unset;

}

.nav .pc:last-child::after {
    width: 0;
}

.nav .pc:last-child::before {
    --width: 4rem;
    content: '';
    width: var(--width);
    height: 100%;
    background: var(--color_hover_text);
    position: absolute;
    border-radius: none;
    top: 0;
    left: calc(-1*var(--width) - 1rem);
    transform: skew(-30deg);
    z-index: -1;
    transition: .2s;
}

.nav .pc:last-child:hover::before {
    left: calc(100% + 1rem);
}

._icon_key {
    width: 1.2rem;
    height: 1.2rem;
    margin-right: 1rem;
    z-index: 1;
    border: .1rem solid var(--color_hover_text);
    position: relative;
    margin-top: .3rem;
    background: white;
}

._icon_key::after {
    content: '';
    position: absolute;
    width: 70%;
    height: 70%;
    left: 50%;
    top: -57%;
    transform: translateX(-50%) rotate(45deg);
    border: .1rem solid var(--color_hover_text);
    border-bottom-color: rgba(0, 0, 0, 0);
    border-right-color: rgba(0, 0, 0, 0);
    border-radius: 100%;
    z-index: 0;

}

._icon_key::before {
    content: '';
    position: absolute;
    width: .05rem;
    height: .05rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: .1rem solid var(--color_hover_text);
    border-radius: 100%;
    background: var(--color_hover_text);
}

.nav .nav_list {
    position: absolute;
    top: 100%;
    right: 0;
    width: 25rem;
    height: 0;
    background: white;
    border-bottom-right-radius: 2rem;
    border-bottom-left-radius: 2rem;
    cursor: default;
    overflow: hidden;
    transition: .2s;
    z-index: 1;
}

.nav_list .nav_list_item {
    display: block;
    width: 100%;
    padding: .5rem 2.5rem;
    cursor: pointer;
    transition: .2s cubic-bezier(0.6, 0, 0.4, 1);
    text-decoration: none;
    color: black;
}

.nav_list .nav_list_item h5 {
    font-weight: 200;
}

.nav_list .nav_list_item:hover h5 {
    color: black;
    font-weight: 600;
}

.nav .pc:hover .nav_list {
    height: 18rem;
    z-index: 2;
}

.nav .pc:hover .nav_list_item {
    margin-top: 1rem;
}

.nav .pc:first-child:hover::before {
    display: block;
}

/* icon nav mobile */
.nav_mobile {
    display: none;
    width: 4rem;
    height: 4rem;
    position: relative;
    /* background: red; */
    cursor: pointer;
    z-index: 0;
    margin-right: 4.3025rem;
}

.nav_mobile::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: calc(100% + .2rem);
    height: calc(100% + .2rem);
    z-index: 0;
}

.nav_mobile:hover::before {
    border: 1px dashed black;
}

._line {
    position: absolute;
    width: 3.2rem;
    height: .5rem;
    top: .4rem;
    left: 50%;
    transform: translateX(-50%);
    background: black;
    transition: .2s linear;
}

._line:nth-child(2) {
    top: calc(2rem - .25rem);
}

._line:nth-child(3) {
    top: calc(3.6rem - .5rem);
}

.active ._line {
    top: calc(2rem - .25rem);
}

.active ._line:nth-child(1) {
    transform: translateX(-50%) rotate(45deg);
}

.active ._line:nth-child(3) {
    transform: translateX(-50%) rotate(-45deg);
}

.active ._line:nth-child(2) {
    width: 0;
}

.TopicLists {
    width: 100%;
    z-index: 1;
    background: var(--color_background_main);
}

._main_items {
    height: 6rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

._main_items a {
    text-decoration: none;
    color: black;
    font-size: 1.8rem;
    padding: 0 1rem;
    margin: 0 3rem;
    height: 50%;
    display: grid;
    place-items: center;
    cursor: pointer;
}

._main_items a:hover {
    color: rgba(0, 0, 0, 0.5);
}

/* nav end */



/* loading start */
.loading {
    z-index: 999;
    position: fixed;
    top: 0;
    left: 0;
    width: 100dvw;
    height: 100dvh;
    display: flex;
    justify-content: space-between;
}

.loading :where(.left, .right) {
    width: 50%;
    height: 100%;
    background: rgb(78, 96, 255);
}

@keyframes endLoad {
    0% {
        width: 50%;
    }

    100% {
        width: 0;
    }
}

/* loading end */

/* tab index start*/


.tab {
    height: 25rem;
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    right: 0;
    z-index: 1;
}

.mainPoints {
    position: absolute;
    height: unset;
    bottom: 0;
    right: 0;
    z-index: 2;
}

.mainPoints_icon {
    display: inline-flex;
    background-color: var(--color_dark_theme);
    transform: rotate(90deg) skew(-30deg);
    margin-right: -2rem;
    transition: .5s .6s cubic-bezier(.65, .05, .36, 1);
    position: relative;
    overflow: hidden;
}

.mainPoints_icon::before {
    content: '';
    width: 4rem;
    height: 100%;
    background: var(--color_theme);
    position: absolute;
    border-radius: none;
    top: 0;
    left: -5rem;
    transform: skew(-30deg);
    transition: .5s;
}

.mainPoints_icon:hover::before {
    left: 10rem;
}

.mainPoints_icon p {
    padding: .8rem 1.5rem;
    transform: skew(30deg);
    cursor: pointer;
    color: var(--color_theme);
    font-size: 1.2rem;
}

.mainPoints .mainPoints_box {
    position: absolute;
    top: -120%;
    right: -33rem;
    font-size: 1.7rem;
    width: 32rem;
    background: white;
    list-style: none;
    z-index: 5;
    transform: translateY(-50%);
    box-shadow: 0px 0rem 1.5rem .1rem rgba(0, 0, 0, .3);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: .5s cubic-bezier(.45, .05, .55, .95);
}

.mainPoints_box p {
    font-size: 1.8rem;
    color: black;
}

.mainPoints_box ul {
    list-style: none;
    margin-top: 1rem;
    height: min(45dvh, 31rem);
    overflow-y: auto;
}

.mainPoints_box ul li {
    margin: .5rem 0;
    border: .1rem solid rgba(0, 0, 0, 0);
    border-top-color: black;
}

.mainPoints_box ul li a {
    display: block;
    padding: .5rem 0;
    text-decoration: none;
    color: black;
}

.mainPoints_box ul li a:hover {
    font-weight: 600;
}

/* tab index end */


/* footer start */
footer {
    width: 100%;
    background: white;
    overflow: hidden;
}

._main_footer {
    height: unset;
}

._logo_end {
    width: 100%;
    margin: 0;
    margin-top: 2rem;
    height: 7.5rem;
}

._line_end {
    display: block;
    width: 100%;
    height: .1rem;
    background-color: var(--color_dark_theme);
}

._copyright {
    text-align: center;
    width: 100%;
    padding: .5rem 0 2rem;
    font-size: 1.3rem;
}
._copyright p{
    margin-top: .5rem;
}

/* main */
.box_main {
    display: flex;

}

.box_main .contents {
    flex: 1;

}

.contents {
    width: 100%;
    font-size: 1.8rem;
    color: var(--color_text);
    letter-spacing: .1rem;
    line-height: 150%;
}

.contents .addressPoint {
    display: inline-flex;
    align-items: center;
    margin-top: 3rem;
    opacity: .5;
}

.addressPoint::before {
    content: '';
    width: .4rem;
    height: .4rem;
    transform: rotate(45deg);
    border: .25rem solid var(--color_text);
    border-bottom-color: rgba(0, 0, 0, 0);
    border-left-color: rgba(0, 0, 0, 0);
}

.addressPoint a {
    text-decoration: none;
    font-size: 1.8rem;
    color: var(--color_text);
    margin-left: 1rem;

}

.addressPoint:hover {
    opacity: 1;
}

.contents h1 {
    font-size: 4rem;
    color: var(--color_text);
    margin-top: 2rem;
    line-height: 123%;
}

.contents section {
    width: 100%;
    margin: 4rem 0;
}

.contents section a {
    width: 100%;
}

.headArticle {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

section .headArticle_items li {
    list-style: none;
    margin: .5rem 0;
}

section .headArticle_items li a {
    text-decoration: none;
    color: var(--color_text);
}

section .headArticle_items li a:hover {
    font-weight: 600;
}

section h2 {
    font-size: 2.4rem;
    margin-bottom: 1.6rem;
}

section p {
    margin: 1.3rem 0;
}

section p a {
    color: blue;
}

section ul {
    margin-left: 5rem;
}

section ul li {
    margin: .5rem 0;
}

section img {
    margin: 1rem 0;
}

section .l_btn {
    display: inline-flex;
    justify-content: center;
    overflow: hidden;
}

section .l_btn a {
    display: grid;
    place-items: center;
    text-decoration: none;
    padding: 1rem 3rem;
    color: var(--color_theme);
    background: var(--color_dark_theme);
    border-radius: 10rem;
    position: relative;
}

section .l_btn a::before {
    content: '';
    width: 4rem;
    height: 100%;
    background: var(--color_theme);
    position: absolute;
    border-radius: none;
    top: 0;
    left: -5rem;
    transform: skew(-30deg);
    transition: .4s;
}

section .l_btn a:hover::before {
    left: 20rem;
}

.btnStartBack {
    position: fixed;
    bottom: 8dvh;
    width: 5rem;
    height: 5rem;
    right: -100%;
    background: var(--color_dark_theme);
    border-radius: 100%;
    overflow: hidden;
    transition: .2s cubic-bezier(.23, 1, .32, 1);
    z-index: 0;
}

.btnStartBack a {
    display: block;
    width: 5rem;
    height: 5rem;
    position: relative;
}

.btnStartBack a::before {
    content: '';
    width: 4rem;
    height: 100%;
    background: var(--color_theme);
    position: absolute;
    border-radius: none;
    top: 0;
    left: -5rem;
    transform: skew(-30deg);
    transition: .4s;
}

.btnStartBack a:hover::before {
    left: 6rem;
}

.btnStartBack_icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    animation: animationUp_btnStartBack 2s cubic-bezier(.11, .3, 1, .05) infinite;
}

.btnStartBack_icon::before,
.btn_ExitIcon::before {
    content: '';
    width: 1.1rem;
    height: 1.1rem;
    transform: rotate(45deg);
    border: .3rem solid var(--color_theme);
    border-bottom-color: rgba(0, 0, 0, 0);
    border-right-color: rgba(0, 0, 0, 0);
    z-index: 2;
}

.btnStartBack_icon::after,
.btn_ExitIcon::after {
    content: '';
    width: .3rem;
    height: 2rem;
    background: var(--color_theme);
    margin-top: -1.65rem;
    z-index: 1;
}

@keyframes animationUp_btnStartBack {
    0% {
        top: 100%;
    }

    100% {
        top: -100%;
    }
}

.btn_Exit {
    width: 4rem;
    height: 4rem;
    margin-bottom: 1rem;
    border: .1rem dashed black;
    overflow: hidden;
    cursor: pointer;
}

.btn_Exit:hover .btn_ExitIcon {
    animation: leftToRight_btn_Exit 1s ease infinite;
}

@keyframes leftToRight_btn_Exit {
    0% {
        left: -50%;
    }

    100% {
        left: 100%;
    }
}

.btn_ExitIcon {
    width: 100%;
    height: 100%;
    position: relative;
}

.btn_ExitIcon::before {
    position: absolute;
    top: 50%;
    left: 46%;
    transform: translateY(-50%) rotate(45deg);
    width: .7rem;
    height: .7rem;
    border: .2rem solid black;
    border-bottom-color: rgba(0, 0, 0, 0);
    border-left-color: rgba(0, 0, 0, 0);
}

.btn_ExitIcon::after {
    position: absolute;
    top: 24%;
    left: 44%;
    transform: translateY(-50%);
    width: .2rem;
    height: 2rem;
    transform: rotate(90deg);
    margin-top: 0;
    background: black;
}

.languages {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 0;
    z-index: 1;

}

.languages_icon {
    transform: rotate(90deg) skew(-30deg);
    background: var(--color_dark_theme);
    margin-right: -4.05rem;
    position: relative;
    right: 0;
    cursor: pointer;
    overflow: hidden;
}

.languages_icon::before {
    content: '';
    position: absolute;
    width: 4rem;
    height: 100%;
    top: 0;
    left: -5rem;
    background: var(--color_theme);
    transform: skew(-30deg);
    transition: .5s;
}

.languages_icon:hover::before {
    left: 13rem;
}

.languages_icon p {
    display: block;
    padding: .8rem 1.5rem;
    text-decoration: none;
    color: var(--color_theme);
    font-size: 1.2rem;
    transform: skew(30deg);
    text-transform: uppercase;
}

.languages_box {
    position: absolute;
    top: 0;
    display: none;
    right: 0;
}

.themes {
    width: 5.1rem;
    height: 3.1rem;
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1;
}

.themes_box {
    overflow: hidden;
    transform: rotate(90deg) skew(-30deg);
    background: var(--color_dark_theme);
    margin-right: -1.98rem;
    cursor: pointer;
    position: relative;
}

.themes_icon {
    display: flex;
    align-items: center;
    margin-left: 0;
    transition: .5s;
}

.themes_box::before {
    content: '';
    position: absolute;
    width: 4rem;
    height: 100%;
    top: 0;
    left: -5rem;
    background: var(--color_theme);
    transform: skew(-30deg);
    transition: .5s;
}

.themes_box:hover::before {
    left: 9rem;
}

.themes p {
    display: block;
    padding: .8rem 1.5rem;
    color: var(--color_theme);
    font-size: 1.2rem;
    transform: skew(30deg);
    text-transform: uppercase;
    font-size: 1.2rem;
}

/* reponsive start*/
@media screen and (max-width: 52.3125em) {
    .contents h1 {
        font-size: 3rem;
    }

    .contents section {
        margin: 3rem 0;
    }

    .nav {
        --backgroundListNav_visibility: hidden;
        --backgroundLintNav_delay: 0s;
        position: fixed;
        top: 0;
        right: -32rem;
        width: min(80dvw, 31rem);
        height: 100dvh;
        background: white;
        z-index: 1;
        display: block;
        padding: 0 4rem 0 2rem;
        transition: .3s cubic-bezier(.46, .03, .52, .96);
        /* visibility: hidden; */
    }

    .nav::before {
        content: '';
        position: absolute;
        top: 0;
        left: -107dvw;
        width: calc(107dvw);
        height: 100%;
        background: rgba(0, 0, 0, .3);
        transition-delay: var(--backgroundLintNav_delay);
        visibility: var(--backgroundListNav_visibility);
    }

    .nav .pc {
        display: flex;
        height: unset;
    }

    .nav_search-backListNav {
        display: flex;
        align-items: center;
        margin: 0 auto;
        justify-content: space-between;
        width: 100%;
        height: 5.6rem;
        margin-top: 1rem;
    }

    .nav_search-backListNav .nav_search {
        width: calc(100% - 5.4rem);
        height: 90%;
        background: rgba(0, 0, 0, .02);
        border-radius: 10rem;
        display: flex;
        align-items: center;
        justify-content: left;
        position: relative;
        cursor: pointer;
    }

    .nav_search_icon {
        width: 4rem;
        height: 4rem;
        margin-left: 1.5rem;
        position: relative;

    }

    .nav_search_icon::before {
        content: '';
        width: 1.5rem;
        height: 1.5rem;
        border: .2rem solid black;
        position: absolute;
        top: 18%;
        left: 19%;
        border-radius: 100%;
    }

    .nav_search_icon::after {
        content: '';
        position: absolute;
        top: 65%;
        left: 53%;
        width: 1.2rem;
        height: .2rem;
        background: black;
        transform: rotate(45deg);
    }

    .nav_search-backListNav :where(.nav_search, .nav_backListNav)::before {
        content: '';
        width: 100%;
        height: 100%;
        position: absolute;
        top: 50%;
        transform: translate(-50%, -50%);
        left: 50%;
        border-radius: 10rem;
    }

    .nav_search-backListNav :where(.nav_search, .nav_backListNav):hover::before {
        border: .15rem dashed black;
    }

    .nav_search-backListNav .nav_backListNav {
        width: 4rem;
        height: 4rem;
        margin-left: 1rem;
        position: relative;
        cursor: pointer;
    }

    .nav_search-backListNav .nav_backListNav::before {
        border-radius: 0;
    }

    .nav_backListNav_icon {
        width: 100%;
        height: 100%;
        position: relative;
        transition: .5s;
    }

    .nav_backListNav_icon::before,
    .nav_backListNav_icon::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(45deg);
        width: 2.5rem;
        height: .2rem;
        background: black;
    }

    .nav_backListNav_icon::after {
        transform: translate(-50%, -50%) rotate(-45deg);
    }

    .nav_backListNav:hover .nav_backListNav_icon {
        transform: rotate(360deg);
    }

    .NavItems {
        width: 100%;
        list-style: none;
        height: min(74dvh, 48rem);
        margin-top: 1rem;
        font-size: 1.7rem;
        overflow-y: auto;
    }

    .NavItems .mb {
        margin: 1rem 0;
        border: .1rem solid rgba(0, 0, 0, 0);
        border-bottom-color: black;
    }

    .lists .lists_icon {
        width: 100%;
        height: 100%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .icon_next {
        width: 2rem;
        height: 2rem;
        position: relative;
        margin-right: 1rem;
    }

    .icon_next::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(45deg);
        width: .6rem;
        height: .6rem;
        border: .2rem solid black;
        border-top-color: rgba(0, 0, 0, 0);
        border-left-color: rgba(0, 0, 0, 0);
    }

    .NavItems .mb :where(.mb_items a, p) {
        display: block;
        height: 100%;
        width: 100%;
        padding: 2rem 0;
        text-decoration: none;
        color: black;
    }

    .NavItems .mb:hover :where(.mb_items a, p),
    .ItemInlistItems a:hover {
        font-weight: 600;
    }

    .ItemInlistItems {
        width: 100%;
        background: rgba(0, 0, 0, .1);
        overflow: hidden;
        transition: .4s;
        height: 0;
    }

    .ItemInlistItems_box {
        padding: 1rem 0;
    }

    .ItemInlistItems_box a {
        display: block;
        padding: 1rem 2rem;
        text-decoration: none;
        color: black;
        font-size: 1.3rem;
    }
}

@media screen and (max-height: 42.875em) {
    .mainPoints .mainPoints_box {
        top: -183%;
    }
}
@media screen and (max-width: 26.5625em) {
    #logo {
        display: none;
    }
}

/* reponsive end*/