/*--------------------------------------------------------------
# General
--------------------------------------------------------------*/
html {
  scroll-behavior: smooth;
}

body {
  font-size: 18px;
  line-height: 1.8;
  color: #fffffe;
  background-color: #242629;
  font-family: 'Roboto', 'Noto Sans TC', Arial, '微軟正黑體', '新細明體', Helvetica, sans-serif;
}


a {
  color: #ff8906;
  text-decoration: none;
}

a:hover {
  color: #f25f4c;
  text-decoration: none;
}


.color_m {
  color: #c471ed;
}

.linemark {
  font-weight: 700;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(55%, transparent), color-stop(55%, #f4f869));
  background: linear-gradient(transparent 55%, #f4f869 55%);
  display: inline-block;
}

section {
  padding: 100px 20px;
  overflow: hidden;
}


.c-title {
  position: relative;
  padding-bottom: 1rem;
  letter-spacing: 0.3rem;
  font-size: 40px;
  margin-bottom: 2rem;
  z-index: 1;
}

.c-title:before {
  display: block;
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 80%;
  height: 3px;
  background: linear-gradient(to left, rgba(30, 87, 153, 0) 0%, rgba(10, 184, 233, 0.8) 30%, #efefef 60%, #d1a6e7 65%, #c471ed 100%);
  z-index: 1;
}

.c-title span {
  font-size: 60px;
  font-weight: 700;
  font-style: italic;
}

.c-title small {
  letter-spacing: 0.1rem;
  font-size: 25px;
  color: #8bd3dd;
}

.section-bg {
  color: #ffffff;
  background-color: #271065;
  background-image: radial-gradient(at 2% 21%, hsla(263, 87%, 56%, 1) 0, hsla(263, 87%, 56%, 0) 50%),
    radial-gradient(at 87% 2%, hsla(225, 88%, 64%, 1) 0, hsla(225, 88%, 64%, 0) 50%),
    radial-gradient(at 57% 61%, hsla(296, 93%, 59%, 1) 0, hsla(296, 93%, 59%, 0) 50%),
    radial-gradient(at 2% 75%, hsla(216, 86%, 56%, 1) 0, hsla(216, 86%, 56%, 0) 50%);
}



/*--------------------------------------------------------------
# Back to top button
--------------------------------------------------------------*/
.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 996;
  background-color: #ff8906;
  opacity: 0.7;
  width: 40px;
  height: 40px;
  border-radius: 4px;
  transition: all 0.4s;
}

.back-to-top i {
  font-size: 28px;
  color: #fff;
  line-height: 0;
}

.back-to-top:hover {
  opacity: 1;
}

.back-to-top.active {
  visibility: visible;
}


/*--------------------------------------------------------------
# Disable aos animation delay on mobile devices
--------------------------------------------------------------*/
@media screen and (max-width: 768px) {
  [data-aos-delay] {
    transition-delay: 0 !important;
  }
}

/*--------------------------------------------------------------
# Header
--------------------------------------------------------------*/
#header {
  transition: all 0.5s;
  z-index: 997;
  padding: 20px 0;
  background: rgba(36, 38, 41, 0);
}

#header.header-scrolled,
.page-nav {
  background: rgba(36, 38, 41, 0.5);
  padding: 12px 0;
}


#header .logo img,
.page-nav .logo img {
  width: 150px;
}


/*--------------------------------------------------------------
# Navigation Menu
--------------------------------------------------------------*/
/*----- Desktop Navigation-----*/
.navbar {
  padding: 0;
}

.navbar ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
  align-items: center;
}

.navbar li {
  position: relative;
}

.navbar>ul>li {
  padding: 10px 0 10px 24px;
}

.navbar a,
.navbar a:focus {
  display: flex;
  align-items: center;
  /* justify-content: space-between; */
  padding: 0 3px;
  color: #fff;
  white-space: nowrap;
  transition: 0.3s;
  position: relative;
}

.navbar a i,
.navbar a:focus i {
  font-size: 12px;
  line-height: 0;
  margin-left: 5px;
}

.navbar>ul>li>a:before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: #fff;
  visibility: hidden;
  width: 0px;
  transition: all 0.3s ease-in-out 0s;
}

.navbar a:hover:before,
.navbar li:hover>a:before,
.navbar .active:before {
  visibility: visible;
  width: 100%;
}

.navbar a:hover,
.navbar .active,
.navbar .active:focus,
.navbar li:hover>a {
  color: #fff;
}

.navbar .getstarted,
.navbar .getstarted:focus {
  padding: 8px 25px;
  margin-left: 30px;
  border-radius: 5px;
  color: #fff;
  transition: 0.3s;
  font-size: 14px;
  font-weight: 600;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.navbar .getstarted:hover,
.navbar .getstarted:focus:hover {
  color: #fff;
  border-color: #fff;
}

.navbar .getstarted:before,
.navbar li:hover>.getstarted:before {
  visibility: hidden;
}

.navbar .signup {
  color: #FE7D21;
  background-color: #ffffff;
  padding: 5px 15px;
}

.navbar .signup:hover,
.navbar .signup:focus,
.signup:active {
  color: #FE7D21;
  font-weight: 500;
  background-color: #FCFCD4;
}


/*----- Mobile Navigation -----*/

.mobile-nav-toggle {
  color: #fff;
  font-size: 28px;
  cursor: pointer;
  display: none;
  line-height: 0;
  transition: 0.5s;
}

@media (max-width: 991px) {
  .mobile-nav-toggle {
    display: block;
  }

  .navbar ul {
    display: none;
  }
}

.navbar-mobile {
  position: fixed;
  overflow: hidden;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  background: rgba(28, 47, 65, 0.9);
  transition: 0.3s;
  z-index: 999;
}

.navbar-mobile .mobile-nav-toggle {
  position: absolute;
  top: 15px;
  right: 15px;
}

.navbar-mobile ul {
  display: block;
  position: absolute;
  top: 55px;
  right: 15px;
  bottom: 15px;
  left: 15px;
  padding: 15px 0;
  margin: 20px;
  background-color: #efefef;
  overflow-y: auto;
  transition: 0.3s;
}

.navbar-mobile>ul>li {
  padding: 0 20px;
}

.navbar-mobile a,
.navbar-mobile a:focus {
  padding: 10px 20px;
  font-size: 20px;
  color: #212121;
}

.navbar-mobile a:hover:before,
.navbar-mobile li:hover>a:before,
.navbar-mobile .active:before {
  visibility: hidden;
}

.navbar-mobile a:hover,
.navbar-mobile .active,
.navbar-mobile li:hover>a {
  color: #5846f9;
}

.navbar-mobile .getstarted,
.navbar-mobile .getstarted:focus {
  margin: 15px;
}



/*--------------------------------------------------------------
# kv
--------------------------------------------------------------*/
.section-kv {
  position: relative;
  overflow: visible;
  background-color: #000000;
  background-size: cover;
  max-height: 700px;
  overflow: hidden;
  height: 800px;
  padding-top: 0;
}

.kv-content {
  position: relative;
  width: 100%;
  height: 100%;
}

.section-kv .kv-content video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kv-txt {
  width: 100%;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  color: #ffffff;
  text-align: center;
  z-index: 2;
  padding: 1rem;
}

.kvlogo {
  display: block;
  margin: 0 auto 10px;
  width: 55%;
}

.kvslogan {
  display: block;
  width: 50%;
  margin: 0 auto;
}

.kvtitle {
  font-size: 4rem;
  font-weight: 700;
  color: #fefedf;
  letter-spacing: 0.5rem;
  text-shadow: 1px 1px 5px #212121;
}

.kvtitle span {
  font-size: 2.5rem;
  letter-spacing: 0;
  margin-left: -0.5rem;
}

.kv-txt p {
  font-size: 28px;
  letter-spacing: 0.2rem;
}

/* 文字垂直位置定位 改height */
.section-kv .kv-content .kv-txt::before {
  content: "";
  display: block;
  width: 100%;
  height: 200px;
}

@media (max-width:992px) {
  .kvlogo {
    width: 75%;
  }

  .kvslogan {
    width: 65%;
  }

  .kv-txt p {
    font-size: 18px;
  }
}

@media (max-width:576px) {
  .section-kv {
    height: 600px;
  }

  .kvlogo {
    width: 85%;
  }

  .kvslogan {
    width: 70%;
  }

  .kv-txt p {
    font-size: 16px;
  }
}


/*--------------------------------------------------------------
# About
--------------------------------------------------------------*/
.about {
  background-color: hsla(266, 54%, 39%, 1);
  background-image:
    radial-gradient(at 80% 0%, hsla(189, 100%, 56%, 1) 0px, transparent 50%),
    radial-gradient(at 80% 50%, hsla(340, 66%, 61%, 1) 0px, transparent 50%),
    radial-gradient(at 0% 100%, hsla(227, 100%, 77%, 1) 0px, transparent 50%);
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  padding: 120px 20px;
}

.about h4 {
  font-weight: 400;
  line-height: 36px;
}


/*--------------------------------------------------------------
# Call for Papers
--------------------------------------------------------------*/
.papers {
  background: url("../img/CFPbg.jpg") center center no-repeat fixed;
  background-size: cover;
  padding: 80px 20px;
}

.topic-box {
  background-color: #ffffff;
  color: #212121;
  font-size: 16px;
  padding: 15px 20px;
  border-radius: 5px;
  margin-bottom: 20px;
  min-height: 188px;
}

.topic-box img {
  max-width: 100px;
  display: block;
}

.topic-box h4 {
  letter-spacing: 0.08rem;
  width: calc(100% - 110px);
  padding-bottom: 15px;
  color: #c471ed;
  border-bottom: 1px solid #c471ed;
}

.topic-box p {
  margin: 0;
}

.cfp_card {
  border: 1px solid #ffffff;
  background-color: rgba(255, 255, 255, 0.25);
  border-radius: 5px;
  padding: 20px 12px;
  margin-bottom: 30px;
  min-height: 173px;
}


.cfp_card h4 {
  color: #3afcea;
  font-size: 22px;
  letter-spacing: 0.05rem;
}

.cfp_card .cfp_desc p {
  font-size: 16px;
  line-height: 24px;
  margin-bottom: 0px;
  text-align: justify;
}


@media only screen and (max-width: 768px) {
  .cfp_card {
    min-height: auto;
  }

}


/*--------------------------------------------------------------
#  Submission Types
--------------------------------------------------------------*/
.submission {
  position: relative;
}

.submission::before {
  position: absolute;
  content: url(../img/web_deco.png);
  right: 0;
  top: 0;
  opacity: 0.4;
}

.submission h1 {
  font-size: 45px;
  font-weight: 700;
}

.submission h1 span {
  font-weight: 400;
}

.submission-card {
  color: #212121;
  border: 1px solid #666;
  border-left: 6px solid #666;
  background-color: #fff;
  padding: 1rem 2rem;
  margin-bottom: 2rem;
}

.submission .type {
  width: 20%;
}

.submission .content {
  width: 80%;
}

.submission .content strong {
  font-size: 22px;
}

.submission .content p {
  margin-bottom: 0;
  text-align: justify;
}

@media only screen and (max-width: 768px) {
  .submission::before {
    display: none;
  }

  .submission .type,
  .submission .content {
    width: 100%;
  }

  .submission .content p {
    text-align: left;
  }
}

/*--------------------------------------------------------------
#  Regulation
--------------------------------------------------------------*/
.regulation {
  background-color: #16161a;
}



/*--------------------------------------------------------------
# 分頁
--------------------------------------------------------------*/

.page {
  background-position: top;
  background-repeat: no-repeat;
  background-image: url(../img/hero-bg.jpg);
  background-size: cover;
  padding: 0;
}

.page-txt {
  background-color: rgba(255, 255, 255, 0.92);
  padding: 8rem 3rem 4rem;
}

.heading {
  display: flex;
  align-items: center;
  padding: .5em .7em;
  background-color: #FCFCD4;
  color: #212121;
  margin-top: 2rem;
}

.heading::before {
  display: inline-block;
  width: 5px;
  height: 1.5em;
  margin-right: .5em;
  background-color: #03B9FC;
  content: '';
}

.page .bx-ul .bx {
  color: #0057AF;
}

.btn-post {
  display: block;
  max-width: 300px;
  padding: 10px 30px;
  font-size: 20px;
  font-weight: 700;
  color: #F46261;
  border: 3px solid #F46261;
  position: relative;
  background-color: transparent;
  text-decoration: none;
  overflow: hidden;
  border-radius: 15px;
  z-index: 1;
  margin: 0 auto;
  text-align: center;
}

.btn-post::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: #F46261;
  transform: translateX(-100%);
  transition: all .3s;
  z-index: -1;
}

.btn-post:hover {
  color: #ffffff;
}

.btn-post:hover::before {
  transform: translateX(0);
}