/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
    width: 100%;
}
.pc{
    display: block;
    }
.sp{
    display: none;
    }
body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-image: url('../img/jce_color_bg.webp');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.85);
    color: #131d3d;
    height: 100px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.logo {
    text-align: left;
    margin-left: 10%;
    position: absolute;
    top: 30px;
    left: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo img {
    max-width: 340px;
    width: auto;
    display: block;
}

.logo-separator {
    width: 1px;
    height: 40px;
    background-color: #131d3d;
    margin: 0 20px;
}

.logo-text {
    font-size: 14px;
    font-weight: normal;
    color: #131d3d;
    line-height: 1.4;
}

.top-link {
    position: absolute;
    top: 30px;
    right: 10%;
    color: #131d3d;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.8);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid #131d3d;
    transition: all 0.3s ease;
}

.top-link:hover {
    background: #131d3d;
    color: white;
}

/* Hero Section */
.hero {
    padding: 2rem 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-kv-image {
    width: 90%;
    height: auto;
    max-width: auto;
    display: block;
    margin: 0 auto;
    text-align: center;
}

/* Scroll Down Indicator (Mobile Only) */
.scroll-down {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    flex-direction: column;
    align-items: center;
    color: #131d3d;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.scroll-down:hover {
    opacity: 0.7;
}

.scroll-arrow {
    position: relative;
    margin-bottom: 0.5rem;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.scroll-line {
    width: 2px;
    height: 30px;
    background: #131d3d;
    position: relative;
    overflow: hidden;
}

.scroll-line::before {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, #131d3d, transparent);
    animation: scrollLineMove 2s infinite;
}

.scroll-chevron {
    font-size: 1.2rem;
    animation: chevronBounce 2s infinite;
}

.scroll-text {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;
    font-family: 'Arial', sans-serif;
    opacity: 0.8;
}

@keyframes scrollLineMove {
    0% {
        top: -100%;
    }
    50% {
        top: 100%;
    }
    100% {
        top: 100%;
    }
}

@keyframes chevronBounce {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.6;
    }
    50% {
        transform: translateY(8px);
        opacity: 1;
    }
}

/* Outline */
.outline {
    padding: 2rem 0;
    text-align: center;
}

.outline-contents {
    background: linear-gradient(to right, #d3dbe0, #abadda);
    padding: 4rem 0;
    text-align: center;
}

.outline-contents h3 {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 900;
    color: #131d3d;
    font-size: 2.6rem;
    margin: 0 0 3rem 0;
}

.outline-contents-item-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4rem;
}

.outline-contents-item-area img {
    width: 100%;
    max-width: 1050px;
    height: auto;
    display: block;
}

.outline-contents-item-area img:first-child {
    align-self: flex-start;
    width: calc(50% + 525px);
    max-width: 100%;
}

.outline-image {
    width: 100%;
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Case Study */
.case-study {
    padding: 4rem 0;
}

.case-study-title {
    display: block;
    margin: 0 auto 3rem;
    max-width: 600px;
    width: 100%;
    height: auto;
}

.case-study-description {
    font-family: 'Noto Serif', serif;
    font-weight: 600;
    font-size: 1.2rem;
    text-align: center;
    margin: 1rem 0 2rem 0;
    color: #121c3c;
}

.case-study-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 2rem;
    position: relative;
}

.case-study-grid::before {
    content: '';
    position: absolute;
    top: 25px;
    left: 25px;
    right: -25px;
    bottom: -25px;
    background: linear-gradient(to right, #f7c9d5, #72aed9);
    z-index: -1;
}

.case-study-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s ease;
}

.case-study-item:hover {
    transform: translateY(-5px);
}

.case-study-content {
    aspect-ratio: 1;
    width: 100%;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.case-study-client {
    font-size: 1.1rem;
    color: #121c3c;
    margin: 0;
    text-align: center;
}

.case-study-item:nth-child(1) .case-study-content { background: linear-gradient(45deg, #667eea, #764ba2); }
.case-study-item:nth-child(2) .case-study-content { background: linear-gradient(45deg, #f093fb, #f5576c); }
.case-study-item:nth-child(3) .case-study-content { background: linear-gradient(45deg, #4facfe, #00f2fe); }
.case-study-item:nth-child(4) .case-study-content { background: linear-gradient(45deg, #43e97b, #38f9d7); }
.case-study-item:nth-child(5) .case-study-content { background: linear-gradient(45deg, #fa709a, #fee140); }
.case-study-item:nth-child(6) .case-study-content { background: linear-gradient(45deg, #a8edea, #fed6e3); }

.case-study-contact {
    grid-column: 1 / -1;
    text-align: center;
    margin-top: 2rem;
}

.case-study-contact-btn {
    background-color: #ea5514;
    color: white;
    border: 2px solid #ea5514;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.case-study-contact-btn:hover {
    background-color: white;
    color: #ea5514;
    border: 2px solid #ea5514;
    transform: translateY(-2px);
}

/* Separate Section */
.separate {
    padding: 4rem 0;
    background-image: url('../img/jce_color_separate_bg.webp');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-blend-mode: normal;
    transform: skewY(-3deg);
    margin: 2rem 0;
    min-height: 500px;
    position: relative;
}

.separate .container {
    transform: skewY(3deg);
}

.separate h3 {
    font-family: 'Noto Serif', serif;
    font-weight: 600;
    font-size: 2rem;
    color: #131d3d;
    text-align: center;
    margin-bottom: 3rem;
    text-shadow: 0 0 15px rgba(255, 255, 255, 1), 
                 2px 2px 4px white, 
                 -2px -2px 4px white, 
                 2px -2px 4px white, 
                 -2px 2px 4px white,
                 4px 0 6px white,
                 -4px 0 6px white,
                 0 4px 6px white,
                 0 -4px 6px white;
}

.separate p {
    font-family: 'Noto Serif', serif;
    font-weight: 600;
    font-size: 1.2rem;
    line-height: 1.8;
    text-align: center;
    color: #131d3d;
    text-shadow: 0 0 15px rgba(255, 255, 255, 1), 
                 2px 2px 4px white, 
                 -2px -2px 4px white, 
                 2px -2px 4px white, 
                 -2px 2px 4px white,
                 4px 0 6px white,
                 -4px 0 6px white,
                 0 4px 6px white,
                 0 -4px 6px white;
}

.separate-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.step {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1.5rem;
}

.step h4 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.step p {
    color: #666;
    line-height: 1.6;
}

/* Color Sample */
.color-sample {
    padding: 4rem 0;
}

.color-sample-title {
    background: linear-gradient(to right, #f7c9d5, #72aed9);
    color: #131d3d;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 1.8rem;
    padding: 2rem 8rem;
    margin: 0 auto 3rem;
    text-align: center;
    transform: skew(-25deg);
    display: inline-block;
    position: relative;
    left: 50%;
    transform: translateX(-50%) skew(-25deg);
    z-index: 2;
    box-shadow: 14px 14px #fff;
    opacity: 0;
    transform: translateX(-100%) skew(-25deg);
    transition: all 0.8s ease-out;
}

.color-sample-title.animate {
    opacity: 1;
    transform: translateX(-50%) skew(-25deg);
}

.color-sample-title span {
    display: inline-block;
    transform: skew(25deg);
}

.color-sample-contents {
    background: linear-gradient(135deg, #f7c9d5, #72aed9);
    padding: 2rem 3rem 6rem 3rem;
    margin: 2% auto;
    max-width: 1000px;
    position: relative;
    z-index: 1;
}

.color-sample-contents::before {
    content: '';
    position: absolute;
    top: -16px;
    left: -16px;
    right: 16px;
    bottom: 16px;
    background: white;
    z-index: -1;
}

.color-sample-contents h3 {
    font-family: 'Noto Serif', serif;
    font-weight: 600;
    font-size: 1.8rem;
    color: #131d3d;
    text-align: center;
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

.color-sample-contents-area {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.color-sample-contents-area:last-child {
    margin-bottom: 0;
}

.color-sample-contents-item {
    flex: 1;
}

.color-sample-contents-item img {
    width: 100%;
    height: auto;
    display: block;
}

.color-sample-contents-item p {
    font-family: 'Noto Serif', serif;
    font-size: 1rem;
    line-height: 1.8;
    color: #131d3d;
    margin-bottom: 1rem;
}

.color-sample-contents-item p:last-child {
    margin-bottom: 0;
}

.color-sample-contents h4 {
    background: #7691ca;
    color: white;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    padding: 1rem 2rem;
    margin: 2rem auto 1rem auto;
    text-align: center;
    width: 45%;
    border-radius: 0;
}

.color-sample-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-family: 'Noto Sans JP', sans-serif;
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.color-sample-table th {
    background: #7691ca;
    color: white;
    padding: 1rem 0.5rem;
    text-align: center;
    font-weight: 700;
    font-size: 0.9rem;
    border: 1px solid #5a7cb8;
}

.color-sample-table td {
    padding: 1rem 0.5rem;
    text-align: center;
    border: 1px solid #ddd;
    font-size: 0.9rem;
    color: #131d3d;
}

.color-sample-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.color-sample-table tr:nth-child(even) {
    background: #f8f9fa;
}

.color-sample-table tr:hover {
    background: #e8f2ff;
}

.color-sample-contents > p {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.9rem;
    color: #666;
    text-align: left;
    margin: 1rem 0 0 0;
    line-height: 1.6;
}

/* Color Harmony */
.color-harmony {
    padding: 4rem 0;
}

.color-harmony-title {
    background: linear-gradient(to right, #bbdfc5, #72aed9);
    color: #131d3d;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 1.8rem;
    padding: 2rem 8rem;
    margin: 0 auto 3rem;
    text-align: center;
    transform: skew(-25deg);
    display: inline-block;
    position: relative;
    left: 50%;
    transform: translateX(-50%) skew(-25deg);
    z-index: 2;
    box-shadow: 14px 14px #fff;
    opacity: 0;
    transform: translateX(100%) skew(-25deg);
    transition: all 0.8s ease-out;
}

.color-harmony-title.animate {
    opacity: 1;
    transform: translateX(-50%) skew(-25deg);
}

.color-harmony-title span {
    display: inline-block;
    transform: skew(25deg);
}

.color-harmony-contents {
    background: linear-gradient(135deg, #bbdfc5, #72aed9);
    padding: 2rem 3rem 6rem 3rem;
    margin: 2% auto;
    max-width: 1000px;
    min-height: 300px;
    position: relative;
    z-index: 1;
}

.color-harmony-contents::before {
    content: '';
    position: absolute;
    top: -16px;
    left: -16px;
    right: 16px;
    bottom: 16px;
    background: white;
    z-index: -1;
}

.color-harmony-contents h3 {
    font-family: 'Noto Serif', serif;
    font-weight: 600;
    font-size: 1.8rem;
    color: #131d3d;
    text-align: center;
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

.color-harmony-contents-area {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 3rem;
}

.color-harmony-contents-area:last-child {
    margin-bottom: 0;
}

.color-harmony-contents-item {
    flex: 1;
}

.color-harmony-contents-item img {
    width: 100%;
    height: auto;
    display: block;
}

.color-harmony-contents-item p {
    font-family: 'Noto Serif', serif;
    font-size: 1rem;
    line-height: 1.8;
    color: #131d3d;
    margin-bottom: 1rem;
}

.color-harmony-contents-item p:last-child {
    margin-bottom: 0;
}

.color-harmony-mockup {
    justify-content: center;
    width: 60%;
    margin: 0 auto;
}

.color-harmony-mockup .color-harmony-contents-item {
    width: 100%;
}

.color-harmony-contents h4 {
    background-color: transparent;
    color: #85b7b7;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    padding: 1rem 2rem;
    margin: 2rem auto 1rem auto;
    text-align: center;
    width: auto;
    border-radius: 0;
    border: 1px solid #85b7b7;
    white-space: nowrap;
}

/* Contact */
.contact {
    padding: 6rem 0;
    background-image: linear-gradient(rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8)), url('../img/AdobeStock_1182405261.webp');
    color: white;
    opacity: 0.9;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    text-align: center;
    width: 100%;
    margin: 0 auto;
}

.contact h3 {
    font-family: 'Noto Serif', serif;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.contact > p {
    font-family: 'Noto Serif', serif;
    font-size: 1.2rem;
    margin-bottom: 6rem;
    opacity: 0.9;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    margin-top:2rem;
}

.contact-item {
    padding: 1rem;
    background: rgba(255,255,255,0.3);
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.contact-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.contact-item p {
    font-size: 1.1rem;
}

.contact-item a {
    color: white;
    text-decoration: none;
}

.cta-button {
    background-color: #ea5514;
    color: white;
    border: 2px solid #ea5514;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    background-color: white;
    color: #ea5514;
    border: 2px solid #ea5514;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0 10rem 0;
    text-align: center;
    width: 100%;
    margin: 0 auto;

}

.footer p {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
        width: 100%;
        max-width: 100vw;
    }
    
    .pc{
        display: none;
    }
    .sp{
        display: block;
    }
    
    .scroll-down {
        display: flex;
    }
    .header {
        height: 80px;
    }
    
    body {
        padding-top: 80px;

    }
    
    
    .logo {
        margin-left: 5%;
        top: 20px;
    }
    
    .logo img {
        max-width: 250px;
    }
    
    .logo-separator {
        height: 30px;
        margin: 0 15px;
    }
    
    .logo-text {
        font-size: 12px;
    }
    .hero {
    padding:0 0 3rem 0;
    margin-top: -40px;
    }
    .hero-kv-image {
    width: 100%;
    margin-bottom: 30%;
    }
    .case-study-title {
        max-width: 450px;
    }
    .case-study-grid::before {
    top: 10px;
    left: 10px;
    right: -10px;
    bottom: -10px;
}
    .logo img {
        max-height: 50px;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 0rem;
    }
    
    .hero-text h2 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .info-box {
        padding: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .separate-steps {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .contact-item {
        padding: 0.8rem;
    }
    
    .contact-item a {
        color: white;
        text-decoration: none;
    }
    
}

@media (max-width: 480px) {
    .header {
        height: 70px;
    }
    
    body {
        padding-top: 70px;
    }
    
    
    .separate {
        margin-left: 0px;
        margin-right: 0px;
        width: 100%;
        background-attachment: scroll;
    }
    
    .logo {
        margin-left: 3%;
        top: 20px;
    }
    
    .logo img {
        max-width: 200px;
    }
    
    .logo-separator {
        height: 25px;
        margin: 0 10px;
    }
    
    .logo-text {
        font-size: 10px;
        line-height: 1.2;
    }
    
    .top-link {
        top: 15px;
        right: 3%;
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .case-study-title {
        max-width: 350px;
    }
    
    .case-study-client {
        font-size: 0.9rem;
    }
    
    .hero {
        padding: 0;
    }
    
    .outline, .case-study, .separate, .color-sample, .color-harmony, .contact {
        padding: 3rem 0;
    }
    
    .separate h3 {
        font-size: 1.5rem;
    }
    
    .separate p {
        font-size: 0.9rem;
    }
    
    .case-study-grid {
        width: 90%;
    }
    
    .outline-image {
        content: url('../img/jce_color_outline_sp.webp');
    }
    
    .outline-contents-item-area img:nth-child(1) {
        content: url('../img/jce_color_outline_contents_item_01_sp.webp');
    }
    
    .outline-contents-item-area img:nth-child(2) {
        content: url('../img/jce_color_outline_contents_item_02_sp.webp');
    }
    
    .outline-contents-item-area img:nth-child(3) {
        content: url('../img/jce_color_outline_contents_item_03_sp.webp');
    }
    
    .outline-contents {
        padding: 3rem 5%;
    }
    
    .outline-contents h3 {
        font-size: 1.8rem;
    }
    
    .outline-contents-item-area img:first-child {
        margin-left: -5%;
        width: 100%;
    }
    
    .hero-kv-image {
        content: url('../img/jce_color_kv_sp.webp');
    }
    
    .contact-item:nth-child(2) p {
        color: #e94738;
    }
    
    .color-sample-title {
        font-size: 1.4rem;
        padding: 1.5rem 2rem;
        box-shadow: 8px 8px #fff;
        opacity: 0;
        transform: translateX(-50%) skew(-20deg);
        transition: all 0.8s ease-out;
    }
    
    .color-sample-title.animate {
        opacity: 1;
        transform: translateX(-50%) skew(-20deg);
    }
    
    .color-sample-title span {
        transform: skew(20deg);
    }
    
    .color-harmony-title {
        font-size: 1.4rem;
        padding: 1.5rem 4rem;
        box-shadow: 8px 8px #fff;
        opacity: 0;
        transform: translateX(50%) skew(-20deg);
        transition: all 0.8s ease-out;
    }
    
    .color-harmony-title.animate {
        opacity: 1;
        transform: translateX(-50%) skew(-20deg);
    }
    
    .color-harmony-title span {
        transform: skew(20deg);
    }
    
    .contact h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    }
    .contact > p {
    font-size: 1rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    }
    .footer {
        width: 100%;
    }
    
    .color-sample-contents {
        padding: 3rem 2rem 3rem 1rem;
        margin-left: 4%;
    }
    
    .color-sample-contents::before {
        top: -12px;
        left: -12px;
        right: 12px;
        bottom: 12px;
    }
    
    .color-sample-contents h3 {
        font-size: 1.4rem;
        margin-bottom: 1.5rem;
    }
    
    .color-sample-contents-area {
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 2rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    .color-sample-contents-item p {
        font-size: 0.9rem;
        margin-bottom: 0.8rem;
    }
    
    .color-sample-contents h4 {
        font-size: 1rem;
        padding: 0.8rem 1.5rem;
        margin: 1.5rem auto 0.8rem auto;
        width: 80%;
    }
    
    .color-sample-table {
        font-size: 0.8rem;
        overflow-x: auto;
        display: block;
        white-space: nowrap;
    }
    
    .color-sample-table th,
    .color-sample-table td {
        padding: 0.6rem 0.3rem;
        font-size: 0.7rem;
    }
    
    .color-sample-table td:first-child {
        font-size: 0.7rem;
        min-width: 120px;
    }
    
    .color-sample-contents > p {
        font-size: 0.8rem;
        margin: 0.8rem 0 0 0;
    }
    
    .color-harmony-contents {
        padding: 3rem 2rem 3rem 1rem;
        margin-left: 4%;
    }
    
    .color-harmony-contents::before {
        top: -12px;
        left: -12px;
        right: 12px;
        bottom: 12px;
    }
    
    .color-harmony-contents h3 {
        font-size: 1.4rem;
        margin-bottom: 1.5rem;
    }
    
    .color-harmony-contents-area {
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 2rem;
        width: 90%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .color-harmony-contents-item p {
        font-size: 0.9rem;
        margin-bottom: 0.8rem;
    }
    
    .color-harmony-contents h4 {
        font-size: 0.8rem;
        padding: 0.8rem 1.5rem;
        margin: 1.5rem auto 0.8rem auto;
        width: 90%;
        white-space: normal;
    }
    
    
    .contact {
        background-image: linear-gradient(rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8)), url('../img/AdobeStock_1182405261_sp.webp');
    }
    
    .step {
        padding: 2rem;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f7c9d5, #72aed9);
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: linear-gradient(135deg, #72aed9, #f7c9d5);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.back-to-top:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 1rem;
    }
}