* {
    margin: 0;
    padding: 0;
}
body {
    background: #f7f7f7;
    background: rgb(238, 243, 238); 
    
}


main > section {
    padding-block: clamp(2.5rem, 8vh, 6.5rem);
    
    padding-inline: clamp(0.75rem, 3vw, 2rem);
}


main .card:not(.swiper .card) {
    width: auto; 
    margin-inline: clamp(0.5rem, 2vw, 1.5rem);
}
img {
    width: 100%;
    height: auto;
}

.card {
    
    
    
    
    
    
    
}

.page_logo {
    width: 2.12rem;
}


#page_navbar {
    background-color: rgba(33, 37, 41, 0.6) !important; 
}


#firstView_wrapper {
    position: relative;
    width: 100%;
    height: 100vh;
}
.first_view_backend_wrapper {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    z-index: -99;
}

.first_view_backend_image {
    background-size: cover !important;
    height: 100vh;
    width: auto;
    width: 100%;

    
    background: url('../media/Google/google-20240719.png') no-repeat center center;

    animation: move 5s infinite alternate;
}
@keyframes move {
    0% {
        transform: translate(0, 12%) scale(1.5);
    }
    25% {
        transform: translate(10px, 2%) scale(1.6);
    }
    50% {
        transform: translate(-10px, 45%) scale(2.07);
    }
    75% {
        transform: translate(10px, 22%) scale(1.8);
    }
    100% {
        transform: translate(-10px, 2%) scale(1.5);
    }
}

#firstView_bg_canvas_theMatrix {
    position: absolute;
    top: 0;
    left: 0;
    z-index: -99;
    width: 100%;
    height: 100vh;
    filter: brightness(0.85);
    opacity: 0.26;
}
#firstView_textWrapper {
    width: 100%;
    height: 100vh;
    z-index: 99;
    display: grid;
    justify-content: center;
    align-items: center;
    text-align: center;
    text-transform: uppercase;
}



.parallax_StevenJobs {
    background-image: url('../media/Apple/Steve-Jobs-Introducing-MacBook-Air-2.jpg');
    background-attachment: scroll; 
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}


.mask_animation {
    
    
    

    background: linear-gradient(to left, red, yellow, red, yellow, red); 

    -webkit-text-fill-color: transparent; 
    -webkit-background-clip: text; 
    -webkit-background-size: 200% 100%;
    -webkit-animation: masked_animation 4s linear infinite;
    text-shadow: 2px 2px 8px rgba(255, 255, 255, 0);
}
@keyframes masked_animation {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: -100% 0;
    }
}




.gradientSample {
    width: 100%;
    color: #f7f7f7;
    
    background: #00bfff; 
    background: -webkit-linear-gradient(to left, #f51919, #7e11f1); 
    background: linear-gradient(to left, #f51919, #7e11f1); 
    display: grid;
    justify-content: center;
    align-items: center;
}


.image_border_animate {
    background: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, purple);
    padding: 0.2rem;
    border-radius: 0.5rem;
}

.text_box_shadow {
    box-shadow: 0 5px 10px 5px rgb(255 255 255);
    box-shadow: 0 1px 50px 10px #ffeb3b;
}


.wrapper_effect_snow_2 {
    background-attachment: scroll; 
    background-image: url('media/effect_snow_2/xh.jpg');
    background-size: cover;
    width: 100%;
}
.qinyuanchun {
    text-align: center;
    font-size: 6rem;
    font-weight: 300;
    color: #e8ff2a;
}
#canvasID_effect_snow_2_flake {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
}






.heartBeat {
    
    display: inline-block;
    -webkit-animation: throb 1.29s ease-in-out infinite;
    animation: throb_heartBeat 0.99s ease-in-out infinite;
}
@-webkit-keyframes throb_heartBeat {
    0% {
        -webkit-transform: scale(0.68);
    }
    30% {
        -webkit-transform: scale(0.68);
    }
    40% {
        -webkit-transform: scale(1);
    }
    50% {
        -webkit-transform: scale(0.68);
    }
    60% {
        -webkit-transform: scale(0.68);
    }
    70% {
        -webkit-transform: scale(1);
    }
    80% {
        -webkit-transform: scale(0.68);
    }
    100% {
        -webkit-transform: scale(0.68);
    }
}


.name_yang {
    display: inline-block;
    animation: throb_heartBeat_out 1.265s ease-in-out infinite;
    transform-origin: center center;
    position: relative;
    padding-block: 0.16em; 
    line-height: 1;
}

.name_yang::before,
.name_yang::after {
    content: '';
    position: absolute;
    left: -0.12em;
    right: -0.12em;
    height: 2px;
    background: linear-gradient(90deg, transparent, #fcd535 22%, #fcd535 78%, transparent);
    box-shadow: 0 0 6px rgba(252, 213, 53, 0.75);
    pointer-events: none;
}
.name_yang::before {
    top: 0;
}
.name_yang::after {
    bottom: 0;
}


@keyframes throb_heartBeat_out {
    0% {
        transform: scale(1);
    }
    6% {
        transform: scale(1.26);
    } 
    12% {
        transform: scale(1);
    }
    38% {
        transform: scale(1);
    } 
    44% {
        transform: scale(1.26);
    } 
    50% {
        transform: scale(1);
    }
    56% {
        transform: scale(1.26);
    } 
    62% {
        transform: scale(1);
    }
    100% {
        transform: scale(1);
    } 
}
@-webkit-keyframes throb_heartBeat_out {
    0% {
        -webkit-transform: scale(1);
    }
    6% {
        -webkit-transform: scale(1.26);
    }
    12% {
        -webkit-transform: scale(1);
    }
    38% {
        -webkit-transform: scale(1);
    }
    44% {
        -webkit-transform: scale(1.26);
    }
    50% {
        -webkit-transform: scale(1);
    }
    56% {
        -webkit-transform: scale(1.26);
    }
    62% {
        -webkit-transform: scale(1);
    }
    100% {
        -webkit-transform: scale(1);
    }
}




.googleFont_ChineseSimplified {
    font-family: 'Liu Jian Mao Cao', sans-serif;
}

.googleFont_EnglishTitle {
    font-family: 'Koulen', sans-serif;
}
.googleFont_EnglishPoem {
    font-family: 'Marck Script', sans-serif;
}




#lifeComment {
    background-image: url('../media/Blackhole.png');

    background-position: center;
    background-color: green;
    color: #f7f7f7;
    background-repeat: no-repeat;
    background-attachment: scroll; 
    background-size: cover;
}



.parallax-in-view {
    background-attachment: fixed !important;
}

.nihongdeng {
    
    color: #00cdff;
    text-shadow: 0px 0px 15px #ffc107;
}


.swiper_main {
    width: 100%;
}
.swiper_main .swiper-slide {
    text-align: center;
    font-size: 18px;
    
    display: flex;
    justify-content: center;
    align-items: center;
    background-size: cover;
    background-position: center;
}

.swiper_main .swiper-slide img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.swiper_thumb {
    box-sizing: border-box;
    padding: 10px 0;
}

.swiper_thumb .swiper-slide {
    width: 25%;
    opacity: 0.4;
}

.swiper_thumb .swiper-slide-thumb-active {
    opacity: 1;
}




.swiper_card {
    width: min(44vh, 80vw); 
    height: 78vh; 
    margin: 0 auto;
}
.swiper_card .swiper-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 1.4rem;
    font-size: clamp(1.6rem, 5vw, 3rem);
    font-weight: bold;
    color: white;
    padding: 1.4rem;
    letter-spacing: 0.02em;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.45); 
    font-size: 3.5rem; 
}

.swiper_card .swiper-slide:nth-child(1n) {
    background-color: red;
}

.swiper_card .swiper-slide:nth-child(2n) {
    background-color: orange;
}

.swiper_card .swiper-slide:nth-child(3n) {
    background-color: #e3e300;
}

.swiper_card .swiper-slide:nth-child(4n) {
    background-color: green;
}

.swiper_card .swiper-slide:nth-child(5n) {
    background-color: blue;
}

.swiper_card .swiper-slide:nth-child(6n) {
    background-color: indigo;
}

.swiper_card .swiper-slide:nth-child(7n) {
    background-color: purple;
}




.swiper_parallax {
    width: 100%;
    
}

.swiper_parallax .swiper-slide {
    font-size: 18px;
    background: transparent;
    color: yellow;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    padding: 40px 60px;
}

.swiper_parallax .parallax-bg {
    position: absolute;
    left: 0;
    top: 0;
    width: 130%;
    height: 100%;
    -webkit-background-size: cover;
    background-size: cover;
    background-position: center;
}

.swiper_parallax .swiper-slide .title {
    font-size: 41px;
    font-weight: 300;
}

.swiper_parallax .swiper-slide .subtitle {
    font-size: 21px;
}

.swiper_parallax .swiper-slide .text {
    font-size: 14px;
    max-width: 400px;
    line-height: 1.3;
}



.swiper_vertical {
    width: 100%;
    height: 30vh; 
}
.swiper_vertical .swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}
.swiper_vertical .swiper-slide img {
    display: block;
    width: 100%;
    object-fit: cover;
}


.swiper_slidesPerView {
    width: 100%;
     
}

.swiper_slidesPerView .swiper-slide {
    text-align: center;
    font-size: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.swiper_slidesPerView .swiper-slide img {
    display: block;
    width: 100%;
    object-fit: cover;
}
.swiper_slidesPerView .swiper-slide video {
    display: block;
    width: 100%;
    object-fit: cover;
}

.swiper_slidesPerView .swiper-pagination {
    position: unset;
}



.swiper_scrollContainer {
    width: 100%;
    height: 30vh;
}

.swiper_scrollContainer .swiper-slide {
    font-size: 18px;
    height: auto;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    padding: 30px;
}



.swiper_autoHeight {
    width: 100%;
    height: auto;
}

.swiper_autoHeight .swiper-slide {
    text-align: center;
    font-size: 18px;
    background: indigo;
    height: 300px;
    
}




.swiper_effect_cube {
    width: 80vw;
    height: 80vw;
}

.swiper_effect_cube .swiper-slide {
    background-position: center;
    background-size: cover;
}

.swiper_effect_cube .swiper-slide img {
    display: block;
    width: 100%;
}



.swiper_coverFlow {
    width: 100%;
    min-height: 100vh;
}

.swiper_coverFlow .swiper-slide {
    display: grid;
    justify-content: center;
    align-content: center;
    min-height: 100vh;
    border-radius: 1rem;
    background-position: center;
    background-size: cover;
}

.swiper_coverFlow .swiper-slide img {
    display: block;
    width: 100%;
    border-radius: 1rem;
}
.swiper_coverFlow .swiper-slide video {
    border-radius: 1rem;
}




.swiper_autoplayProgress {
    width: 100%;
    min-height: 10vh;
    margin-top: 2rem;
}

.swiper_autoplayProgress .swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}

.swiper_autoplayProgress .swiper-slide img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.swiper_autoplayProgress .autoplay-progress {
    position: absolute;
    right: 16px;
    bottom: 16px;
    z-index: 10;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--swiper-theme-color);
}

.swiper_autoplayProgress .autoplay-progress svg {
    --progress: 0;
    position: absolute;
    left: 0;
    top: 0px;
    z-index: 10;
    width: 100%;
    height: 100%;
    stroke-width: 4px;
    stroke: var(--swiper-theme-color);
    fill: none;
    stroke-dashoffset: calc(125.6 * (1 - var(--progress)));
    stroke-dasharray: 125.6;
    transform: rotate(-90deg);
}




.swiper_grid {
    width: 100%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
}

.swiper_grid .swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #f7f7f7;
    height: calc((100% - 30px) / 2) !important; 

    
    display: flex;
    justify-content: center;
    align-items: center;
}



.swiper_vertical_in_horizontal {
    width: 100%;
    height: 50vh;
}

.swiper_vertical_in_horizontal .swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}

.swiper_vertical_in_horizontal .swiper-slide img {
    display: block;
    width: 100%;
    
    object-fit: cover;
}




.swiper_pageination_fraction .swiper-pagination {
    text-align: right; 
    padding-right: 1rem; 
}



.main_carousel {
    width: 100%;
    min-height: 50vh;
}
.main_carousel_item {
    text-align: center;
    
    display: grid !important;
    justify-content: center !important;
    align-items: center !important;
}
.sub_carousel {
    width: 100%;
    min-height: 50vh;
}
.sub_carousel_item {
    
    display: grid !important;
    justify-content: center !important;
    align-items: center !important;
    font-size: 1rem;
    text-align: left;
    padding: 1rem;
}



#googleChart_orgchart {
    overflow-x: auto;
}
.google-visualization-orgchart-table {
    width: 100%;
}



.wrapper_google_map_street_view {
    min-height: 50vh;
}
#googleMap_streetView_map,
#googleMap_streetView_pano {
    width: 100%;
    height: 100%;
}




.aerial-view-media {
    object-fit: contain;
    height: 100%;
    width: 100%;
}




#hammerTouchDemo {
    background: #f7f7f7;

    width: 100%;
    height: 50vh;
    display: grid;
    align-items: center;
    justify-content: center;
}



.video-background-holder {
    position: relative;
    background-color: black;
    
    height: 100vh;
    min-height: 25rem;
    width: 100%;
    overflow: hidden;
    
    display: flex;
    align-items: center;
    justify-content: center;
}


.video-background-holder + :not(.video-background-holder) {
    margin-top: 3rem !important;
}

.video-background-holder video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: 0;
    -ms-transform: translateX(-50%) translateY(-50%);
    -moz-transform: translateX(-50%) translateY(-50%);
    -webkit-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%);
}

.video-background-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.video-background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-color: black;
    opacity: 0.5;
    z-index: 1;
}



.MostHardProblemSolved {
    background: linear-gradient(135deg, #4285f4 20%, #34a853 25%, #fbbc05 50%, #ea4335 75%, #34a853 100%);
    background-size: 200% 200%;
    animation: gradientRotation 3s ease infinite;
}

@keyframes gradientRotation {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}


.animation_lightFlash {
    aspect-ratio: 1;
    transition: 0.5s;
    cursor: pointer;
    -webkit-mask: linear-gradient(135deg, rgba(251, 255, 14, 0.925) 40%, #01ffe1, rgba(255, 0, 0, 0.8) 60%) 100% 100%/250% 250%;
}
.animation_lightFlash:hover {
    -webkit-mask-position: 0 0;
}



.card {
    transition: box-shadow 0.3s ease; 
}

.card:active {
    box-shadow: 0 4px 20px rgb(245, 208, 1); 
}



#taiji {
    animation: rotate-reverse 20s linear infinite;
    transform-origin: center center;
}

@keyframes rotate-reverse {
    from {
        transform: rotate(0deg);
    }
    to {
        
        transform: rotate(-360deg);
    }
}




.frame-size {
    width: min(80vw, 1100px);
    height: min(60vh, 520px);
}
.vertical-rl {
    writing-mode: vertical-rl;
}
.couplet-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}




.up_going_number {
    font-size: 18.88rem;
}




.selfStrong {
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;
    -webkit-animation: _ngcontent-ng-c135898131_textShine 3s ease-in-out infinite alternate;
    animation: _ngcontent-ng-c135898131_textShine 3s ease-in-out infinite alternate;
    background: -webkit-radial-gradient(circle, #7182ff 0, #3cff52 100%);
    background: radial-gradient(circle, #7182ff 0, #3cff52 100%);

    background: -webkit-radial-gradient(circle, #4285f4 0, #ea4335 25%, #fbbc05 50%, #34a853 75%, #4285f4 100%);
    background: radial-gradient(circle, #4285f4 0, #ea4335 25%, #fbbc05 50%, #34a853 75%, #4285f4 100%);

    background-clip: text;
    background-size: 200%;
}

.swiper_slidesPerView .swiper-slide .ratio .card .card-body {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.rotate-90 {
    transform: rotate(90deg);
}

@-webkit-keyframes _ngcontent-ng-c135898131_textShine {
    0% {
        background-position: 0 50%;
    }
    15% {
        background-position: 0 50%;
    }
    85% {
        background-position: 100% 100%;
    }
    to {
        background-position: 100% 100%;
    }
}
@keyframes _ngcontent-ng-c135898131_textShine {
    0% {
        background-position: 0 50%;
    }
    15% {
        background-position: 0 50%;
    }
    85% {
        background-position: 100% 100%;
    }
    to {
        background-position: 100% 100%;
    }
}




.card-title {
    text-transform: capitalize;
}
.card {
    border: 0;
    box-shadow: 0.5rem 0.5rem 1rem rgba(0, 0, 0, 0.15);
    width: 100%;
}
.card .ratio {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.card img,
.card video {
    display: block;
    max-width: 100%;
    max-height: 100%;
    margin: auto;
    object-fit: cover;
    object-position: center center;
}


@media (prefers-reduced-motion: no-preference) {
    .card img.card-img-top {
        will-change: object-position;
        
        animation: cardImageRoam 24s ease-in-out infinite;
    }
}

@keyframes cardImageRoam {
    0% {
        object-position: 0% 0%;
    } 
    25% {
        object-position: 100% 0%;
    } 
    50% {
        object-position: 100% 100%;
    } 
    75% {
        object-position: 0% 100%;
    } 
    100% {
        object-position: 0% 0%;
    } 
}


.swiper-slide:nth-of-type(4n + 2) .card img.card-img-top {
    animation-delay: -6s;
}
.swiper-slide:nth-of-type(4n + 3) .card img.card-img-top {
    animation-delay: -12s;
}
.swiper-slide:nth-of-type(4n + 4) .card img.card-img-top {
    animation-delay: -18s;
}

.swiper-pagination-bullet {
    background: #e8dc81 !important; 
    opacity: 1;
}
.swiper-pagination-bullet-active {
    background: #ffd500 !important; 
}


.responsive_ratio {
    --bs-aspect-ratio: 125%; 
}
@media (min-width: 768px) {
    .responsive_ratio {
        --bs-aspect-ratio: 56.25%; 
    }
}




.card-text {
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    transition: all 0.3s ease;
}

.card-text.expanded {
    -webkit-line-clamp: unset;
    overflow: visible;
}

.toggle-text-btn {
    color: #e9ff00;
    cursor: pointer;
    font-size: 0.85rem;
    user-select: none;
    margin-top: 0.5rem;
    text-align: right;
    transition: all 1.3s; 
}

.toggle-text-btn:hover {
    text-decoration: underline;
}


#valueMeanAll {
    font-size: clamp(8rem, 26vh, 20rem);
    white-space: nowrap; 
}

#TechnologyForWhat {
    font-size: 12.06rem;
}
.fullScreenHeartbeat {
    font-size: 80rem;
    color: #ff0000;
}

.swiper.swiper_slidesPerView {
    margin-top: 3rem;
    margin-bottom: 3rem;
}
.swiper-wrapper {
    
}
.swiper .swiper-slide .card {
    background: white;
    color: black;
}

.swiper .swiper-slide .card .responsive_ratio {
    overflow: hidden;
}

.swiper .swiper-slide .card img {
    
    -webkit-animation: throb 1.29s ease-in-out infinite;

    
    
    animation: float_move 1.5s ease-in-out infinite;

    
    will-change: transform;
}


@keyframes float_move {
    0% {
        transform: translateY(0);
    }
    50% {
        
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0);
    }
}


.swiper.swiper-in-view .swiper-slide-active .card {
    background: linear-gradient(to left, red, yellow, red, yellow, red);
    -webkit-background-size: 200% 100%;
    background-size: 200% 100%;
    -webkit-animation: masked_animation 4s linear infinite;
    animation: masked_animation 4s linear infinite;
    color: black;
    box-shadow: 0 0 20px 5px rgb(255 235 59);
}

#localTime {
    font-size: 0.5715rem;
}






.pswp__video-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    cursor: pointer; 
}
.pswp__video-wrapper video {
    max-width: 100%;
    max-height: 100%;
    outline: none;
    pointer-events: none; 
}



@media only screen and (min-width: 640px) {
    
}

@media only screen and (max-width: 640px) {
    
    .first_view_backend_image {
        background: url('../media/Google/google-20240719.png') no-repeat center center;
    }
    .up_going_number {
        font-size: 2.88rem;
    }
    #TechnologyForWhat {
        font-size: 5.06rem;
    }
    .fullScreenHeartbeat {
        font-size: 30rem;
    }
    .swiper_card .swiper-slide {
        writing-mode: sideways-rl;
        font-size: 3.56rem;
    }
    #valueMeanAll {
        font-size: 9rem;
        writing-mode: vertical-rl; 
    }

    .qinyuanchun {
        text-align: center;
        font-size: 2rem;
        font-weight: 300;
        color: #e8ff2a;
    }
}



@media (prefers-reduced-motion: no-preference) {
    
    .yqh-reveal {
        opacity: 0;
        transform: translateY(28px);
        transition:
            opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
            transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
        transition-delay: var(--yqh-reveal-delay, 0ms);
    }
    
    .yqh-reveal-zoom {
        transform: scale(0.92);
    }
    .yqh-reveal.yqh-revealed {
        opacity: 1;
        transform: none;
    }

    
    .card {
        transition:
            transform 0.35s ease,
            box-shadow 0.35s ease;
    }
    .card:hover {
        transform: translateY(-4px) scale(1.01);
        box-shadow:
            0 10px 24px rgba(0, 0, 0, 0.18),
            0 0 14px rgba(112, 179, 255, 0.55);
    }
    
    .swiper .card,
    .swiper .card:hover {
        transform: none;
    }

    
    #page_navbar .nav-link {
        position: relative;
    }
    #page_navbar .nav-link::after {
        content: '';
        position: absolute;
        left: 0.5rem;
        right: 0.5rem;
        bottom: 0.2rem;
        height: 2px;
        background: currentColor;
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.3s ease;
    }
    #page_navbar .nav-link:hover::after {
        transform: scaleX(1);
    }

    
    .page_logo {
        transition: transform 0.6s ease;
    }
    .navbar-brand:hover .page_logo {
        transform: rotate(360deg);
    }
}



[data-bs-theme='dark-summer'] {
    color-scheme: dark;

    
    --bs-body-bg: #15120a;
    --bs-body-bg-rgb: 21, 18, 10;
    --bs-body-color: #f3e6c0;
    --bs-body-color-rgb: 243, 230, 192;

    
    --bs-emphasis-color: #fff6d8;
    --bs-emphasis-color-rgb: 255, 246, 216;
    --bs-secondary-color: rgba(243, 230, 192, 0.75);
    --bs-secondary-bg: #241d0f;
    --bs-secondary-bg-rgb: 36, 29, 15;
    --bs-tertiary-color: rgba(243, 230, 192, 0.5);
    --bs-tertiary-bg: #1c1709;
    --bs-tertiary-bg-rgb: 28, 23, 9;

    
    --bs-primary: #fcd535;
    --bs-primary-rgb: 252, 213, 53;
    --bs-primary-text-emphasis: #ffe680;
    --bs-primary-bg-subtle: #3a2f08;
    --bs-primary-border-subtle: #6b5710;

    
    --bs-heading-color: #ffd60a;

    
    --bs-border-color: #4a3d15;
    --bs-border-color-translucent: rgba(252, 213, 53, 0.2);
    --bs-link-color: #ffd60a;
    --bs-link-color-rgb: 255, 214, 10;
    --bs-link-hover-color: #ffe680;
    --bs-link-hover-color-rgb: 255, 230, 128;
    --bs-code-color: #ffcf6b;
}


[data-bs-theme='dark-summer'] .card {
    --bs-card-bg: #1e1809;
    --bs-card-color: var(--bs-body-color);
    --bs-card-border-color: rgba(252, 213, 53, 0.28);
    box-shadow: 0 0.5rem 1.4rem rgba(0, 0, 0, 0.55);
}



[data-bs-theme='light-summer'] {
    color-scheme: light;

    --bs-body-bg: #fffbe9;
    --bs-body-bg-rgb: 255, 251, 233;
    --bs-body-color: #4a3b07;
    --bs-body-color-rgb: 74, 59, 7;

    --bs-emphasis-color: #2d2400;
    --bs-emphasis-color-rgb: 45, 36, 0;
    --bs-secondary-color: rgba(74, 59, 7, 0.75);
    --bs-secondary-bg: #f6edcb;
    --bs-secondary-bg-rgb: 246, 237, 203;
    --bs-tertiary-color: rgba(74, 59, 7, 0.5);
    --bs-tertiary-bg: #fbf4d8;
    --bs-tertiary-bg-rgb: 251, 244, 216;

    --bs-primary: #c79400;
    --bs-primary-rgb: 199, 148, 0;
    --bs-primary-text-emphasis: #6b5000;
    --bs-primary-bg-subtle: #fff2c2;
    --bs-primary-border-subtle: #e6c766;

    --bs-heading-color: #8a6a00;

    --bs-border-color: #e6d79a;
    --bs-border-color-translucent: rgba(199, 148, 0, 0.25);
    --bs-link-color: #b8860b;
    --bs-link-color-rgb: 184, 134, 11;
    --bs-link-hover-color: #8a6400;
    --bs-link-hover-color-rgb: 138, 100, 0;
    --bs-code-color: #a06b00;
}

[data-bs-theme='light-summer'] .card {
    --bs-card-bg: #fffdf2;
    --bs-card-color: var(--bs-body-color);
    --bs-card-border-color: rgba(199, 148, 0, 0.3);
}



.theme-option.active {
    font-weight: 600;
    color: #000 !important;
    background-color: var(--bs-warning, #ffc107) !important;
    border-color: var(--bs-warning, #ffc107) !important;
    box-shadow: 0 0 0 0.15rem rgba(255, 193, 7, 0.35);
}


#themeSwitcher [data-bs-toggle='collapse'] .bi-chevron-down {
    transition: transform 0.25s ease;
}
#themeSwitcher [data-bs-toggle='collapse'][aria-expanded='true'] .bi-chevron-down {
    transform: rotate(180deg);
}