.navbar {
    box-shadow: 0 2px 10px 2px rgb(204, 204, 204);
    background-color: white;
    width: 100%;
}

.navbar .navbar-collapse {
    flex-grow: 0;
}

.header {
    margin-top: 77px;
    padding-top: 6.5rem;
    height: 75vh;
    position: relative;
    padding-bottom: 3rem;

}

.header__lefttop {
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
    width: 350px;
}

.header__title {
    font-size: 4rem;
    color: #20616D;
    font-weight: 400;
}

.header__sub {
    color: #38A7BB;
    font-size: 1.5rem;
    font-weight: 300;
    position: relative;
}

.header__sub::before, .header__sub::after {
    content: " ";
    position: absolute;
    width: 12%;
    height: 1px;
    background-color: #38A7BB;
    top: 50%;
}

.header__sub::before {
    left: 28%;
}

.header__sub::after  {
    left: 60%;
}

.header__form {
    margin: 1rem auto;
    justify-content: center;
}

.header__form__input {
    border-radius: 10rem;
    padding: .4rem .8rem;
    width: 60%;
    margin-left: 4.5rem;
}

.header__form__sub {
    border-radius: 10rem;
    background-color: #FCA25E;
    color: white;
    border: none;
    width: 5rem;
    transform: translateX(-100%);
    transition: all .3s;
}

.header__form__sub:hover {
    background-color: #ff892e;
}

.header__right {
    width: 80%;
    height: 50vh;
    background-image: url('../imgs/電腦2.webp');
    background-size: contain;
    background-repeat: no-repeat;
    margin: 0 auto;
    position: relative;
}

.header__right__cir {
    width: 60%;
    position: absolute;
    right: 0%;
    top: -5%;
    z-index: -1;
}

.header__right__video {
    position: absolute;
    width: calc(80% - 10%);
    height: auto;
    left: 3.3rem;
    top: 1.8rem;
}

.header__right__magnifier {
    position: absolute;
    width: 25%;
    right: 3%;
    bottom: 1%;
}

.header__right__bubble {
    position: absolute;
    width: 22%;
    top: 0;
    left: 0;
    transform: translate(-60%, -50%);
}

.header__right__linecir {
    width: 45%;
    position: absolute;
    left: -8%;
    bottom: -3%;
    z-index: -1;
}

.category {
    padding: 2rem 0;
}

.category__btngrp {
    padding: 0 8rem;
}

.category__btn {
    background-color: #A7D9E2;
    border: none;
    border-radius: 5rem;
    outline: none;
    color: white;
    font-size: 1.3rem;
    padding: .4rem 2rem;
}

.category__btn.active {
    background-color: #38A7BB;
}

.card__rank {
    border: 1px solid #CECECE;
    box-shadow: 1px 1px 5px 1px rgb(211, 211, 211);
    position: relative;
    padding: 1rem 1.5rem;
}

.top20 .card__rank {
    margin-bottom: 1.5rem;
}

.top3 {
    padding: 3rem 0rem;
    padding-bottom: 5rem;
    position: relative;
}

.top3 .row {
    padding: 0rem 4rem;
}

.top3 .backfill {
    position: absolute;
    width: 100%;
    height: 100px;
    background-color: #FFEBE8;
    left: 0;
    right: 0;
    top: 7rem;
}

.top3__num {
    color: #FCA25E;
    font-size: 5.8rem;
    font-family: 'Trebuchet MS';
    position: absolute;
    left: 1rem;
    top: -3.5rem;
    font-weight: 300;
}

.card__rank__word {
    color: #20616D;
    margin-left: 3rem;
    font-size: 1.8rem;
    font-weight: 400;
}

.card__rank__goto {
    text-align: right;
}

.card__rank__link {
    color: #38A7BB;
    text-decoration: none;
    font-weight: 400;
}
.card__rank__link:hover {
    color: #19879b;
}

.top20 {
    padding-bottom: 5rem;
}

.top20 .row {
    padding: 0rem 4rem;
}

.top20 .card__rank__word {
    margin-left: 0;
}
.top20__num {
    color: #FCA25E;
    font-size: 2.5rem;
    font-family: 'Trebuchet MS';
    font-weight: 300;
    display: inline-block;
    width: 2.2rem;
    
}

.footer {
    background-color: #555555;
    padding: 50px 0;
    color: #999999;
}

.footer h4 {
    text-transform: uppercase;
    color: white;
    font-size: 14px;
    font-weight: 800;
}

.footer__btn__text {
    font-size: 1.3rem;
    color: white;
}

.footer .btn {
    border: 2px solid #38a7bb;
    color: #38a7bb;
    text-decoration: none;
}

.followus__btn {
    text-decoration: none;
    color: white;
}

.followus__btn:hover {
    color: #38a7bb;
}

.footer .btn:hover {
    color: white;
    background-color: #38a7bb;
}

.followus__txt {
    display: inline-block;
    margin-right: 1rem;
    color: white;
    font-weight: 600;
}

.footer_img {
    height: 60px;
}


/* content page */

.cntheader {
    margin-top: 81px;
    padding: 4rem 0;
    position: relative;
    padding-bottom: 2rem;
}

.cntheader__sub {
    color: #38A7BB;
    font-size: 1.5rem;
    font-weight: 300;
    position: relative;
}

.cntheader__sub::before, .cntheader__sub::after {
    content: " ";
    position: absolute;
    width: 15%;
    height: 1px;
    background-color: #38A7BB;
    top: 50%;
}

.cntheader__sub::before {
    left: 18%;
}

.cntheader__sub::after  {
    left: 67%;
}

.cntheader .category__btngrp {
    padding: 0 4rem;
}

.card__art {
    padding: 1rem;
    border: 1px solid #20616D;
    border-radius: 1rem;
    margin-bottom: 1rem;
}

.card__title {
    font-size: 1.8rem;
    font-weight: 400;
}

.card__text {
    color: #918F8F;
}

.card__link {
    display: inline-block;
    color: #38A7BB;
    margin-right: 1rem;
    text-decoration: none;
}

.card__link:hover {
    color: #20616D;
}

.toparticle {
    border: 1px solid #CECECE;
    box-shadow: 1px 2px 3px 1px rgb(224, 224, 224);
}

.toparticle__title {
    color: white;
    background-color: #38A7BB;
    text-align: center;
    font-size: 1.3rem;
    padding: .3rem 0;
    position: relative;
}

.toparticle__title img {
    position: absolute;
    width: 150px;
    right: -4rem;
    top: -3.5rem;
}

.toparticle__list {
    padding: 1.5rem;
    padding-top: 0;
    list-style: none;
    padding-bottom: 1rem;
}

.toparticle__list-item {
    padding: .3rem;
    border-bottom: 1px solid #CECECE;
    color: #38A7BB;
    position: relative;
}

.toparticle__list-item:nth-of-type(10) {
    border: none;
}


.toparticle__list-item a {
    text-decoration: none;
    color: #38A7BB;
}

.toparticle__num {
    color: #FCA25E;
    font-size: 1.8rem;
    font-family: 'Trebuchet MS';
    font-weight: 300;
    margin-right: 8px;
}

.toparticle__top {
    font-size: 2rem;
}

.toparticle__list-item small {
    position: absolute;
    right: 0;
    top: 45%;
}

.cntsubscribe {
    text-align: center;
}

.cntsubscribe__form {
    position: relative;
}

.cntsubscribe__sub {
    border-radius: 10rem;
    background-color: #FCA25E;
    color: white;
    border: none;
    width: 5rem;
    position: absolute;
    right: 0;
    top: 0;
    padding: .45rem .8rem;
}

.cntsubscribe__sub:hover {
    background-color: #ff892e;
    color: white;
}

.cntsubscribe__input {
    border-radius: 10rem;
    padding: .4rem .8rem;
    width: 100%;
}

@media (max-width: 1300px) {
    .header__right__video {
        position: absolute;
        width: calc(80% - 4%);
    }
}

@media (max-width: 992px) {
    .header__title {
        font-size: 3rem;
    }
    .cntheader .header__title {
        font-size: 2.2rem;
    }
    .header {
        padding-top: 4rem;
        height: 50vh;
    }
    .header__right {
        height: 40vh;
    }
    .header__right__magnifier {
        right: -2.5rem;
        bottom: 1rem;
    }
    .header__sub {
        font-size: 1.3rem;
    }
    .header__sub::before, .header__sub::after {
        width: 8%;
    }
    .header__sub::before {
        left: 30%;
    }
    .header__sub::after  {
        left: 62%;
    }
    .header__form__input {
        font-size: .9rem;
    }
    .category__btngrp {
        padding: 0;
    }
    .category__btn {
        padding: .3rem 1.5rem;
        font-size: 1.2rem;
    }
    .ctncategory__btn {
        padding: .2rem 1rem;
        font-size: 1rem;
    }
    .top3 .row {
        padding: 0;
    }
    .card__rank {
        padding: .8rem 1rem;
    }
    .top3__num {
        left: .6rem;
        top: -2.5rem;
        font-size: 4rem;
    }
    .card__rank__word {
        margin-left: 1.5rem;
        font-size: 1.2rem;
    }
    .card__rank hr {
        margin-top: 8px;
        margin-bottom: 8px;
    }
    .top20 .row {
        padding: 0;
    }
    .top20__num {
        font-size: 2.1rem;
        width: 1.6rem;
    }
    .container__footer {
        width: 95vw;
    }
    .header__form {
        width: 85%;
        position: relative;
    }
    .header__form__input {
        margin-left: 0;
        width: 100%;
    }
    .header__form__sub {
        transform: none;
        position: absolute;
        right:0;
        top: 0;
    }
    .header__right__linecir {
        bottom: 0;
    }
    .cntheader__sub {
        font-size: 1.2rem;
    }
    
    .cntheader__sub::before {
        left: 13%;
    }
    
    .cntheader__sub::after  {
        left: 72%;
    }
    .toparticle__title img {
        position: absolute;
        width: 90px;
        right: -2rem;
        top: -2rem;
    }
    .toparticle__top {
        font-size: 1.7rem;
    }
    .fb__fr {
        width: 100%;
    }
    .cntsubscribe__form {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .header {
        height: 70vh;
    }
    .header .col-md-5 {
        margin-bottom: 3rem;
    }
    .header__right__bubble {
        width: 15%;
    }
    .header__right__magnifier {
        right: 4rem;
        bottom: 1rem;
    }
    .category {
        padding-top: 4rem;
    }
    .top3 {
        padding-bottom: 2rem;
    }
    .top3 .col-md-4 {
        margin-bottom: 1.5rem;
    }
    .top3 .col-md-4:nth-of-type(3) {
        margin-bottom: 0;
    }
    .card__rank {
        margin-bottom: 1.5rem;
    }
    .row-right {
        margin-top: 2rem;
    }
    .cntheader {
        padding-bottom: 0rem;
    }
    .header__right__video {
        position: absolute;
        width: calc(80% - 10%);
        left: 2.3rem;
        top: 1.5rem;
    }
}

@media (max-width: 576px) {
    .header__title {
        font-size: 2.5rem;
    }
    .header {
        padding-top: 3rem;
        height: 63vh;
        padding-bottom: 0rem 
    }
    .header__right {
        height: 30vh;
    }
    .header__right__magnifier {
        right: 0rem;
        bottom: 1.5rem;
    }
    .category__btn {
        padding: .2rem 1rem;
        font-size: 1rem;
    }
    .category {
        padding: 1rem;
    }
    .footer_img {
        height: 50px;
    }
    .footer {
        font-size: .9rem;
    }
}

@media (max-width: 480px) {
    .ctncategory__btn {
        margin-top: .6rem;
    }
    .header__right__video {
        position: absolute;
        width: calc(80% - 5%);
        left: 2.1rem;
        top: 1.3rem;
    }
}