* {
                margin: 0;
                padding: 0;
                box-sizing: border-box;
            }
            html {
                scroll-behavior: smooth;
            }
            body {
                font-family: 
                "Helvetica Neue",
                "Hiragino Kaku Gothic ProN",
                "Yu Gothic",
                sans-serif;
                color:#ffffff;
                background: #07111f;
                overflow-x: hidden;
            }
            a {
                text-decoration: none;
                color: inherit;
            }
            header {
                position: fixed;
                top: 0;
                width: 100%;
                height: 75px;
                z-index: 1000;

                display: flex;
                background: rgba(7, 17, 31, 0.8);
                padding: 0 7%;
                align-items: center;
                justify-content: space-between;
                backdrop-filter: blur(12px);
                border-bottom: 2px solid rgba(75, 175, 234, 0.5);
            }
            .logo {
                height: 100%;
                font-size: 1.8rem;
                font-weight: bold;
                letter-spacing: 0.05em;
            }
            .logo-latter {
                color:#4fc3f7;
            }
            .logo-all {
                line-height: 1;
                text-align: center;
            }
            .logo-en {
                font-style: italic;
            }
            .fullname {
                color: #fff;
                width: 100%;
                font-size: 35%;
                font-size: normal;
                font-weight: 600;
            }

            .menu-for-pc {
                display: flex;
                gap: 20px
            }
            nav a {
                font-size: clamp(0.8rem, 1vw, 1rem);
                font-weight: bold;
                letter-spacing: 0.08em;
                transition: 0.3s;
                color: #e9e9e9;
            }
            nav a:hover {
                color:#4fc3f7;
            }
            .menu-items {
                display: inline-flex;
                flex-direction: column;
                line-height: 1.1;
                text-align: left;
            }
            .menu-ruby {
                font-size: 0.6rem;
            }

            .hamburger-menu {
                display: none;
            }
            #menu-button-check {
                display: none;
            }

            main {
                position: relative;
            }

            section {
                padding: 20px 10%;
            }
            section:last-child {
                margin-bottom: 40px; 
            }
            #news-top {
                position: relative;
                top: 105px;
                text-align: center;
                z-index: 3;
            }
            #news-top a {
                display: inline-block;
                font-size: 0.95rem;
                font-weight: 700;
                padding: 0.5rem 1.5rem;
                color: rgba(255, 223, 65, 1);
                border: 1px solid rgba(255, 223, 65, 0.8);
                background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 140, 0, 0.2));
                border-radius: 50px;
                box-shadow: 0 0 15px rgba(255, 215, 0, 0.3);
                animation: pulse 2s infinite;
            }
            @keyframes pulse {
                0%, 100% {
                    transform: scale(1);
                }
                50% {
                    transform: scale(1.03);
                }
            }
            .hero {
                position: relative;
                display: flex;
                align-items: center;
                min-height: 100vh;
                padding: 50px 10% 50px;
                background: linear-gradient(90deg,rgba(3, 10, 20, 0.95),rgba(3, 10, 20, 0.45),rgba(3, 10, 20, 0.2)),
                url("images/hero_img.jpg");
                background-size: cover;
                background-position: center;
            }
            .hero-content {
                position: relative;
                z-index: 2;
                max-width: 850px;
            }
            .hero-subtitle {
                font-size: 1rem;
                letter-spacing: 0.25em;
                color: #4fc3f7;
                margin-bottom: 25px;
            }
            .hero-text {
                font-size: clamp(1.4rem, 2vw, 1.6rem);
                font-family: serif;
                line-height: 2;
                color: #dce9f2;
                margin-bottom: 40px;
            }

            .hero h1 {
                font-size: clamp(6rem, 8vw, 9rem);
                font-style: italic;
                font-weight: 800;
                line-height: 0.9;
                letter-spacing: -0.04em;
                margin-bottom: 30px;
            }
            .hero-button {
                display: inline-block;
                border: 1px solid #4fc3f7;
                padding: 10px 20px;
                margin-top: 15px;
                font-weight: bold;
                font-size: clamp(1rem, 5vw, 1.5rem);
                letter-spacing: 0.1em;
            }
            .hero-button:hover {
                background: #4fc3f7;
                color: #000;
                transition: 0.3s;
            }
            .section-num-title {
                font-size: clamp(2.5rem, 5vw, 3rem);
                margin-bottom: 15px;
            }
            .section-title {
                color: #4fc3f7;
                letter-spacing: -0.03em;
            }

            .faculty {
                padding: 10px 5px;
                display: flex;
                justify-content: space-between;
                gap: 2%;
            }

            .faculty-content {
                width: 30%;
                height: 400px;
                display: grid;
                grid-template-rows: 1fr 2fr;
                gap: 8px;
                padding: 10px;
                border: 2px solid #264672;
                border-radius: 15px;
                transition: 0.3s;
            }
            .faculty-content:hover {
                cursor: pointer;
                transform: translateY(-5px);
                background-color: #264672;
            }
            .faculty-img-content {
                text-align: left;
            }
            .faculty-img {
                width: 100%;
                display: block;
                border-radius: 10px 10px 0 0;
            }
            .date {
                text-align: left;
                color: #e9e9e9;
            }

            .faculty-text-content {
                display: flex;
                flex-direction: column;
            }
            .faculty-text {
                display: flex;
                align-items: flex-start;
                flex: 1;
                font-size: 1.2rem;
            }
            .faculty-text p {
                font-size: 1.1rem;
                line-height: 1.5;
                margin-bottom: 15px;
                color: #c3d0db;
            }

            .more-button {
                font-size: 1rem;
                padding: 7px 18px;
            }

            .more-button-content {
                padding: 10px 20px;
                text-align: right;
            }
            .more-button {
                display: inline-block;
                border: 1px solid #4fc3f7;
                padding: 7px 20px;
                font-weight: bold;
                font-size: 1rem;
                letter-spacing: 0.1em;
            }
            .more-button:hover {
                background: #4fc3f7;
                color: #000;
                transition: 0.3s;
            }
 

            .about-content {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .about-img {
                height: 400px;
                border-left: 3px solid #4fc3f7;
            }
            .about-text h3 {
                font-size: 1.8rem;
                margin-bottom: 25px;
            }
            .about-text p {
                font-size: 1.1rem;
                line-height: 1.5;
                margin-bottom: 5px;
                color: #c3d0db;
            }
            .contest-content h3 {
                font-size: 1.8rem;
                margin-bottom: 25px;
            }
            .contest-content span {
                font-size: 2.1rem;
                font-weight: 800;
                display: block;
                text-align: center;
                margin-bottom: 20px;
            }
            .contest-video {
                display: block;
                margin: 0 auto;
                width: 90%;
                max-width: 800px;
                aspect-ratio: 16/9;
                margin-bottom: 20px;
            }
            .contest-content p {
                font-size: 1.1rem;
                line-height: 1.5;
                margin-bottom: 5px;
                color: #c3d0db;
            }

            .join-content {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .join-text h3 {
                font-size: 1.8rem;
                margin-bottom: 25px;
            }
            .join-text p {
                font-size: 1.1rem;
                line-height: 1.5;
                margin-bottom: 5px;
                color: #c3d0db;
            }
            .join-lists {
                margin: 10px 20px 0;
                font-size: 1.3rem;
                color: #4fc3f7;
                font-weight: 500;
            }
            .join-img {
                height: 400px;
                /*
                background: url("https://ykn-st.github.io/albatrossimages/memories/14-1.jpg");
                background-size: cover;
                background-position: center;
                */
                border-left: 3px solid #4fc3f7;
                border-right: 3px solid #4fc3f7;
            }

            .fund-content {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .fund-img {
                height: 400px;
                margin: auto;
            }
            .fund-text h3 {
                font-size: 1.8rem;
                margin-bottom: 25px;
            }
            .fund-text p {
                font-size: 1.1rem;
                line-height: 1.5;
                margin-bottom: 5px;
                color: #c3d0db;
            }


            
            .sns-links p {
                display: block;
                font-size: 1.1rem;
                margin-bottom: 10px;
                color: #c3d0db;

            }
            .sns-button {
                min-height: 90px;
                display: flex;
                align-items: center;
                background: #1a304f;
                padding: 10px 30px;
                font-size: 1.4em;
                font-weight: bold;
                letter-spacing: 0.1em;
                margin-bottom: 10px;
            }
            .sns-button:hover {
                background: #2465c0;
                transition: 0.3s;
            }
            .sns-img {
                width: 70px;
                border-radius: 50%;
            }
            .sns-description {
                margin: auto 20px;
            }
            .sns-description span {
                font-size: 0.8em;
                font-weight: normal;
                letter-spacing: 0;
            }
            .mailaddress {
                display: inline-block;
                margin: 10px 0 0 10px;
                text-decoration: underline;
            }
            #mailaddress h3 {
                font-size: 1rem;
                letter-spacing: 0em;
            }

            footer {
                border-top: 2px solid #356be8;
                background-color: #4fc3f7;
                color: #000;
                padding: 10px 5%;
            }

            .footer > p {
                font-size: 0.9em;
                font-weight: 800;
            }
            .footer-content{
                display: flex;
                font-size: 0.9em;
                font-weight: 550;
            }
            .footer-logo {
                width: 90px;
                height: 90px;
                margin-right: 15px;
            }

            .copyright {
                text-align: left;
            }
            #donate {
                position: fixed;
                right: 20px;
                bottom: 0;
                width: 250px;
            }
            #donate img {
                width: 100%;
                opacity: 0.8;
                transition: 0.3s;
            }
            #donate img:hover {
                opacity: 1;
            }

            /*-----スマホ対応-----*/
            @media (max-width: 768px) {
                header {
                    height: 75px;
                    padding: 5 5%;
                }

                .logo {
                    font-size: 1.8rem;
                }

                .menu-for-pc {
                    display: none;
                }
                .menu-content {
                    width: 60vw;
                    height: 100vh;
                    position: fixed;
                    top: 0;
                    left: 100%;
                    z-index: 80;
                    background-color: #3584bb;
                    transition: 0.3s;
                }
                .menu-content-coordinate {
                    margin-left: 5%;
                    margin-right: 10%;
                }
                .menu-for-phone {
                    display: flex;
                    flex-direction: column;
                    margin-top: 100px;
                }
                .menu-for-phone a {
                    font-size: 1.1rem;
                    background-color: #000;
                    padding: 8px 7%;
                    border-top: 3px solid #2465c0;
                    text-align: left;
                }
                .menu-for-phone:last-child {
                    border-bottom: 3px solid #2465c0;
                }

                #menu-button-check:checked ~ .menu-content {
                    left: 40%;
                    background-color: #000;
                }
                .hamburger-menu {
                    display: flex;
                    align-items: center;
                }
                .menu-button:hover {
                    cursor: pointer;
                }
                .menu-button {
                    position: fixed;
                    right: 5%;
                    display: flex;
                    width: 40px;
                    height: 40px;
                    align-items: center;
                    justify-content: center;
                    z-index: 90;
                    background-color: #3584bb;
                }
                .menu-button span, .menu-button span::before, .menu-button span::after {
                    content: "";
                    display: block;
                    width: 25px;
                    height: 3px;
                    border-radius: 3px;
                    background-color: #fff;
                    position: absolute;
                    transition: 0.3s;
                }
                .menu-button span::before {
                   bottom: 8px;
                }
                .menu-button span::after {
                    top: 8px;
                }
                #menu-button-check:checked ~ .menu-button span {
                    background-color: rgba(255, 255, 255, 0);
                }
                #menu-button-check:checked ~ .menu-button span::before {
                    transform: rotate(45deg);
                    bottom: 0;
                }
                #menu-button-check:checked ~ .menu-button span::after {
                    transform: rotate(-45deg);
                    top: 0;
                }

                section {
                    padding: 40px 7%;
                }
                .section-num-title {
                    font-size: clamp(2rem, 5vw, 2.5rem);
                }

                #news2025 {
                    top: 155px;
                }
                .hero {
                    align-items: flex-start;
                    min-height: 100vh;
                    padding: 200px 7% 50px;
                }

                .hero h1 {
                    font-size: 3.5rem;
                }
                .hero-button {
                    font-size: 1rem;
                    padding: 10px 25px;
                }
                .hero-subtitle {
                    font-size: 0.8rem;
                }
                .hero-text {
                    font-size: clamp(0.8rem, 2vw, 1.2rem);
                }

                .faculty {
                    display: block;
                }
                .faculty-content {
                    width: 100%;
                    height: 100%;
                    display: grid;
                    grid-template-columns: 1fr 2fr;
                    grid-template-rows: 1fr;
                    gap: 20px;
                    padding: 3px;
                    border: 2px solid #264672;
                    border-radius: 15px;
                    margin-bottom: 15px;
                }
                .faculty-img-content {
                    text-align: left;
                    height: 100%;
                    display: flex;
                    justify-content: center;
                }
                .faculty-img {
                    width: 100%;
                    border-radius:  10px 0 0 10px;
                }
                .faculty-text {
                    display: flex;
                    align-items: flex-end;
                    flex: 1;
                    font-size: 3vw;
                }
                .more-button {
                    font-size: 1rem;
                    padding: 7px 18px;
                }

                .about-content {
                    grid-template-columns: 1fr;
                    gap: 30px;
                }

                .about-img {
                    width: 100%;
                    height: auto;
                }
                .contest-content span {
                    font-size: 1.5rem;
                }

                .join-content {
                    grid-template-columns: 1fr;
                    gap: 30px;
                }
                .join-img {
                    width: 100%;
                    height: auto;
                }

                .fund-content {
                    grid-template-columns: 1fr;
                    gap: 30px;
                }

                .fund-img {
                    width: 100%;
                    height: auto;
                }

                .sns-links {
                    grid-template-columns: 1fr;
                }

                .sns-description {
                    font-size: 0.8em;
                }

                .footer > p {
                    font-size: 0.8em;
                }
                .footer-content {
                    font-size: 0.2em;
                }                .mailaddress {
                    display: block;
                    margin: 0 0 0 10px;
                    text-decoration: underline;
                    font-size: 0.7rem;
                }

                #donate {
                    width: 200px;
                }

            }