* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;

}


body {
    background-color: #f3f3f3;
    color: white;
    min-height: 100vh;
    line-height: 1.4;
}

html {
    scroll-behavior: smooth;
}


/* Navbar */
.custom-navbar {
    position: fixed;
    width: 100%;
    top: 0;
    padding: 15px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* background: transparent; */
    z-index: 100;
    opacity: 1;
    background-color: rgb(84, 84, 84, 50%);
    transition: transform 0.3s ease-in-out;
}

.custom-navbar.hide {
    transform: translateY(-100%);
    pointer-events: none;
}

.logo {
    font-size: 24px;
    font-weight: 700;
}

.logo .highlight {
    color: #00f0ff;
    /* 藍綠亮色 */
}

.custom-navbar .nav-links a {
    /* btn-text */
    font-family: "Noto Sans";
    font-size: 20px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    margin-left: 32px;
    text-decoration: none;
    color: white;
    font-weight: 500;
}

.custom-navbar .nav-links a:hover {
    color: #00EEFF;
}

/* Hero section */
.hero {
    background-image: url(./img/img-ernest.jpg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    width: 100%;
    height: 100vh;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 80px 40px;
}

.hero h1 {
    font-family: "Krona One";
    font-size: 48px;
    line-height: 1.4;
    text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
}

.hero .highlight {
    color: #00f0ff;
}

/* Scroll down */
.scroll-down {
    /* margin-top: auto; */
    text-align: center;
    color: white;
    font-size: 14px;
    position: relative;
    top: 100px;
    margin-top: 40px;
}

.scroll-down p {
    font-size: 20px;
    margin-bottom: 12px;
    text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
}

/* 垂直線條 */
.scroll-line {
    width: 3px;
    height: 80px;
    background-color: #00f0ff;
    margin: 0 auto;
}

/* 圓點 */
.scroll-dot {
    width: 15px;
    height: 15px;
    background-color: #00f0ff;
    border-radius: 50%;
    margin: 8px auto 0;
    margin: 0 auto;
    /* 把 margin-top 設為 0 */
    transform: translateY(-1px);
    /* 微調緊貼 */
}

.about-section {
    padding: 50px 40px;
    background-color: #f3f3f3;
    text-align: center;
}

.section-title {
    color: #000;
    text-align: center;
    /* en-h2 */
    font-family: Krona One;
    font-size: 40px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

.section-description {
    font-family: Krona One;
    text-align: center;
    font-size: 20px;
    color: #000000;
    max-width: 6500px;
    margin: 0 auto 40px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 960px;
    margin: 0 auto;
}

.about-card {
    display: flex;
    width: 459px;
    padding: 45px 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
    border-radius: var(--border-radius, 16px);
    background: #FFF;

    /* card-shadow-grey */
    box-shadow: 1px 1px 12px 3px rgba(181, 181, 181, 0.25);
}

.about-card:hover {
    display: flex;
    width: 459px;
    padding: 45px 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
    border-radius: var(--border-radius, 16px);
    background: #FFF;
    /* card-shadow-blue */
    box-shadow: 2px 1px 16px 4px rgba(59, 196, 224, 0.60);

    transform: scale(1.02);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card-body {
    display: flex;
    align-items: flex-start;
    gap: 80px;
    align-self: stretch;
}


.about-card h2 {
    color: #0EF;
    /* en-h2 */
    font-family: "Krona One";
    font-size: 40px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;


}

.about-card h3 {
    color: #000;
    font-family: "Noto Sans";
    font-size: 24px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
}

.about-card p {
    color: #000;
    font-family: "Noto Sans";
    font-size: 18px;
    font-style: normal;
    font-weight: 400;
    line-height: 30px;
    /* 166.667% */
}

.learn-more-btn {
    font-family: "Krona One";
    font-size: 16px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    color: #000000;
    border: none;
    margin-top: 24px;
    padding: 12px 14px;
    line-height: 18px;
    border-radius: 25.5px;
    width: 184px;
    height: 40px;
    flex-shrink: 0;
    background: linear-gradient(90deg, #C0C1C1 0%, #EBECEC 100%);
}

.learn-more-btn:hover {
    font-family: "Krona One";
    width: 184px;
    height: 40px;
    flex-shrink: 0;
    background: linear-gradient(90deg, #0EF 0%, #EBECEC 100%);
    box-shadow: 0px 4px 4px 0px rgba(0, 0, 0, 0.25) inset;
    transform: r
}

.section-title {
    font-family: "Krona One", sans-serif;
    font-size: 36px;
    font-weight: 400;
    color: #000;
    margin-bottom: 12px;
    line-height: 1.2;
}

.dots {
    color: #0EF;

    /* en-h2 */
    font-family: "Krona One";
    font-size: 40px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}


/* 整體區塊 */
.solar-system-section {
    padding: 80px 80px 30px 80px;
    background-color: #f5f5f5;
    text-align: center;
    font-family: 'Krona One', sans-serif;
}

/* 上方圖片與標題浮在上層 */
.solar-header {
    position: relative;
    overflow: hidden;
    max-width: 1080px;
    margin: 0 auto;
}

.solar-header img {
    width: 100%;
    height: 300px;
    border-radius: 16px;
    display: block;
}

.solar-header h2 {
    position: absolute;
    top: 200px;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 40px;
    font-family: 'Krona One', sans-serif;
    line-height: auto;
    margin: 0;

}

/* 說明文字 */
.solar-subtitle {
    max-width: 960px;
    margin: 30px auto 0;
    font-family: Noto Sans;
    font-size: 20px;
    color: #000000;
    line-height: 1.6;
}

/* 卡片區 2x2 */
.solar-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 40px auto;
}

/* 單張卡片 */
.solar-card {
    background-color: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
    text-align: left;
}

.solar-card:hover {
    transform: translateY(-6px);
}

.solar-card h3 {
    font-family: Noto Sans;
    font-size: 20px;
    color: #000;
    margin-bottom: 10px;
    text-align: center;
}

/* 裝飾線 */
.card-underline {
    width: 100%;
    height: 3px;
    background-color: #00EEFF;
    margin-bottom: 16px;
}

/* 卡片內文 */
.solar-card p {
    font-family: Noto Sans;
    font-size: 18px;
    color: #000000;
    line-height: 1.6;
}

/* 按鈕卡片樣式 */
.solar-card.interactive {
    border: 3px solid #00EEFF;
    border-radius: 16px;
    width: 100%;
    max-width: 459px;
    /* height: 220px; */
    /* ✅ 固定高度，確保垂直置中不被影響 */
    padding: 24px;
    background-color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;

    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.solar-card.interactive:hover {
    transform: translateY(-4px);
    box-shadow: 2px 1px 16px 4px rgba(59, 196, 224, 0.6);
}

.solar-card.interactive .card-content {
    margin-top: 25px;
    transition: transform 0.3s ease;
}

.solar-card.interactive:hover .card-content {
    transform: translateY(-25px);
}

.solar-card.interactive .solar-button {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: inline-block;
    font-family: Noto Sans;
    font-weight: bold;
    font-size: 16px;
    color: #3BC4E0;
    border: 2px solid #3BC4E0;
    border-radius: 30px;

    padding: 10px 24px;
    text-decoration: none;

    pointer-events: none;
    /* 避免未顯示時可點 */
}

.solar-card.interactive .solar-button:hover {
    background-color: #00cbd4;
    color: #fff;
}

.solar-card.interactive:hover .solar-button {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}


.integration-section {
    padding: 20px 40px;
    background-color: #f3f3f3;
    text-align: center;
    font-family: "Krona One", sans-serif;
}

.section-title {
    font-size: 32px;
    font-weight: bold;
    color: #000;
}

.dots {
    color: #00EEFF;

}

.section-description {
    font-family: Noto Sans;
    font-size: 20px;
    color: 000000;
    line-height: 1.6;
    margin-top: 12px;
    margin-bottom: 40px;
}

.integration-card {
    max-width: 1100px;
    height: 160px;
    margin: 0 auto 24px auto;
    background-color: white;
    border-radius: 16px;
    gap: 10px;

    /* card-shadow-grey */
    box-shadow: 1px 1px 12px 3px rgba(181, 181, 181, 0.25);

    display: flex;
    padding: 50px 30px 52px 70px;
    justify-content: center;
    align-items: center;
    text-align: left;
    transform: translateY(5px);
    transition: all 0.3s ease;

}

.integration-card:hover {
    opacity: 1;
    transform: translateY(0);
}


.card-left {
    flex-shrink: 0;
    /* max-width: 360px; */
    justify-content: center;
    display: flex;
    align-items: center;
    gap: 30px;

}



.card-number {
    font-size: 48px;
    width: 60px;
    font-weight: bold;
    color: #6b6b6b;
    margin-bottom: 8px;
}

.card-title {
    width: 382px;
    font-size: 28px;
    color: #6b6b6b;
}

.card-right {
    flex-grow: 1;
}

.card-subtitle {
    font-size: 20px;
    font-weight: bold;
    color: #000;
    margin-bottom: 8px;
    font-family: sans-serif;
}

.card-text {
    font-size: 18px;
    color: #000000;
    font-family: sans-serif;
    line-height: 1.5;
}

/* 圖片區塊 */
.integration-image {
    width: 1100px;
    height: 160px;
    margin: 0 auto 24px auto;
    background-image: url("./img/img-shutter.jpg");
    /* 換成實際圖檔路徑 */
    background-size: cover;
    background-position: center;
    border-radius: 16px;

}

.contact-cta {
    background-color: #fff;
    max-width: 1100px;
    border: #00EEFF solid 3px;
    color: #fff;
    padding: 54px 20px 38px 20px;
    height: 220px;
    text-align: center;
    border-radius: 16px;
    margin: 0 auto 24px auto;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.contact-cta .card-content {
    transition: transform 0.4s ease;
}

.contact-cta .contact-button {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    margin-top: 22px;

    display: inline-block;
    padding: 12px 24px;
    border: 2px solid #3BC4E0;
    border-radius: 30px;
    color: #3BC4E0;
    font-weight: bold;
    text-decoration: none
}

.contact-cta:hover .card-content {
    transform: translateY(-18px);
}

.contact-cta:hover .contact-button {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.contact-cta .contact-button:hover {
    background-color: #00cbd4;
    color: #fff;
}

.contact-cta:hover {
    box-shadow: 2px 1px 16px 4px rgba(59, 196, 224, 0.60);
    transform: translateY(-4px);
}

.contact-cta h3 {
    font-family: "Krona One", sans-serif;
    font-size: 28px;
    margin-bottom: 16px;
    color: #000;
}

.contact-cta p {
    font-family: sans-serif;
    font-size: 18px;
    color: #000000;
}

.contact-button {
    display: inline-block;
    margin-top: 26px;
    padding: 12px 24px;
    border: 2px solid #3BC4E0;
    border-radius: 30px;
    color: #3BC4E0;
    font-weight: bold;
    transition: all 0.3s ease;
    text-decoration: none
}


.site-footer {
    background-color: #545454;
    color: #dbdada;
    padding: 40px 20px 20px;
    font-family: 'Krona One', sans-serif;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid #333;
    padding-bottom: 30px;
    text-align: center;
}

.footer-section {
    flex: 1;
    min-width: 240px;
    margin-bottom: 20px;
}

.footer-section h4 {
    color: #00EEFF;
    font-size: 18px;
    margin-bottom: 12px;

}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: #dbdada;
    text-decoration: none;
    font-size: 16px;
}

.footer-section ul li a:hover {
    text-decoration: none;
    color: #ffffff;
}

.company-info p {
    font-family: Krona One;
    font-size: 16px;
    margin: 6px 0;
}

.footer-logo {
    width: 120px;
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    font-size: 12px;
    color: #aaa;
    margin-top: 20px;
}

/* One Stop Service */

.service-section {
    padding: 0px 80px;

    background-color: #f3f3f3;
    font-family: Krona One, sans-serif;
}

.service-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    max-width: 1200px;
    align-items: center;
    margin: 0 auto
}

/* 左側卡片區塊 */
.service-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex: 1;
    padding-bottom: 30px;
}

/* 單一卡片 */
.service-card {
    background-color: #fff;
    border-radius: 16px;
    display: flex;
    flex: 1 0 0;
    /* align-items: flex-start; */

    padding: 0 40px;
    box-shadow: 1px 1px 12px 3px rgba(181, 181, 181, 0.25);
    gap: 40px;

    width: 560px;
    min-height: 130px;
    justify-content: center;
    align-items: center;
    text-align: left;
    /* flex-shrink: 0; */
    transform: translateY(5px);
    transition: all 0.3s ease;

}

.service-card:hover {
    opacity: 1;
    transform: translateY(0);
}

/* 卡片圖示 */
.service-icon {
    width: 70px;
    height: 70px;
    object-fit: contain;
}

/* 新增：固定文字區塊寬度 */
.service-text {
    width: 400px;
    display: flex;
    /* margin-top: 20px; */
    /* line-height: 25px; */
    flex-direction: column;
    justify-content: center;
}

/* 文字區 */
.service-text h3 {
    font-family: Noto Sans;
    font-size: 20px;
    font-weight: bold;
    color: #000;
    line-height: 36px;

}

.service-text p {
    font-family: Noto Sans;
    font-size: 18px;
    /* margin-top: 8px; */
    color: #000000;
}

/* 立即諮詢欄位 */
.consult-card {
    min-height: 180px;
    padding: 54px 50px 10px 50px;
    margin-top: 6px;
    width: 560px;
    background-color: #fff;
    border-radius: 16px;
    border: 3px solid #00EEFF;
    display: flex;
    text-align: center;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    /* === consult-card 動畫 === */
    position: relative;
}

.consult-card .card-content {
    overflow: hidden;
    transition: transform 0.4s ease;
}

.consult-card .contact-button {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s ease;
    margin-top: 18px;

    display: inline-block;
    padding: 12px 24px;
    border: 2px solid #3BC4E0;
    border-radius: 30px;
    color: #3BC4E0;
    font-weight: bold;
    text-decoration: none
}

.consult-card .contact-button:hover {
    background-color: #00cbd4;
    color: #fff;
}

.consult-card:hover .card-content {
    transform: translateY(-20px);
}

.consult-card:hover .contact-button {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}


.consult-card:hover {
    box-shadow: 2px 1px 16px 4px rgba(59, 196, 224, 0.60);
    transform: translateY(-4px);
}

.consult-card h3 {
    font-family: Noto Sans;
    font-size: 20px;
    font-weight: bold;
    margin: 0;
    color: #000;
}

.consult-card p {
    font-family: Noto Sans;
    font-size: 18px;
    margin-top: 8px;
    color: #000000;
}


/* 右側圖片 */
.service-image {
    position: relative;
    flex: 1;
    border-radius: 16px;
    overflow: hidden;
    height: 788px;
    margin-bottom: 30px;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.show {
    opacity: 1;
    transform: translateY(0);
}


/* 產品總覽頁 */

.products-section {
    padding: 80px 20px 40px 20px;
    background-color: #F3F3F3;
    text-align: center;
    animation: fadeInUp 0.8s ease both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-tags-legend {
    font-family: Noto Sans;
    font-size: 20px;
    color: #000000;
    line-height: 1.8;
}

.section-title {
    color: #000;

    /* en-h2 */
    font-family: "Krona One";
    font-size: 40px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    margin-top: 40px;
    margin-bottom: 16px;
}

.tag-group {
    align-items: center;
    margin-bottom: 40px;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 14px;
    margin: 0 6px;
    color: white;
}

.tag.lpr {
    background-color: #00e3ff;
}

.tag.lpr-pv {
    background-color: #00e3ff;

}

.product-category {
    border: #00EEFF solid 3px;
    background-color: #F3F3F3;
    border-radius: 16px;
    padding: 35px;
    margin: 40px;
    animation: fadeInUp 0.8s ease both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-category h3 {
    text-align: center;
    font-family: "Krona One";
    font-size: 24px;
    margin-bottom: 40px;
    font-weight: bold;
    line-height: normal;
}

.product-grid {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.product-card {
    position: relative;
    text-decoration: none;
    width: 260px;
    height: 380px;
    background-color: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    padding: 10px 16px 18px 16px;
    /* overflow: hidden; */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

/* Hover 狀態：改變陰影，顯示詳情 */
.product-card:hover {
    box-shadow: 0 0 10px 2px rgba(0, 238, 255, 0.4);
    transform: translateY(-6px);
}

.product-tag-img {
    width: 100px;
    height: 28px;
    position: absolute;
    top: -12px;
    left: -12px;
    z-index: 2;
    pointer-events: none;
    /* 讓滑鼠不會干擾 SVG 區域 */
}

/* 圖片容器 */
.product-image {
    margin-top: 20px;
    height: 180px;
    width: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    overflow: hidden;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

/* 名稱 */
.product-name {
    margin-top: 18x;
    font-size: 16px;
    line-height: 0.8;
    font-family: Noto Sans;
    font-weight: 500;
    color: #000;
}

/* 詳情按鈕區（預設隱藏） */
.product-detail {
    height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-weight: bold;
    margin-top: 0;
    font-size: 16px;
    color: #000;
}


.underline {
    width: 100px;
    height: 3px;
    background-color: #00EEFF;
    margin-bottom: 6px;

}

/* Hover 顯示詳情 */
.product-card:hover .product-detail {
    /* display: flex; */
    height: 40px;
    visibility: visible;
    opacity: 1;
}

.dots {
    color: #0EF;

    /* en-h2 */
    font-family: "Krona One";
    font-size: 40px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

/* 預設：漢堡選單隱藏，導覽列正常顯示 */
.hamburger {
    display: none;
}

.navbar-placeholder {
    height: 30px;
    background-color: #F3F3F3;
    /* 桌機版高度，依你的 navbar 實際高度調整 */
}

/* ----------------------------
   Responsive Design (Mobile / Tablet)
---------------------------- */
@media screen and (max-width: 768px) {
    .navbar-placeholder {
        height: 80px;
        /* 依照你展開後 navbar 的實際高度調整 */
    }

    /* ====== Navbar 響應式控制 ====== */
    .custom-navbar {
        flex-direction: row;
        align-items: center;
        padding: 16px 20px 5px 0;
        gap: 10px;
    }

    .nav-links {
        /* display: none; */
        flex-direction: column;
        width: 100%;
        margin-top: 12px;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all 0.4s ease;
        /* 新增：手機版時，導覽連結區塊絕對定位，疊在下方 */
        position: absolute;
        top: 100%;
        /* 放在 navbar 下方 */
        left: 0;
        background-color: rgb(84, 84, 84, 50%);
        /* 設定背景色，可調整透明度 */
        padding: 10px 20px;
        /* 調整 padding */
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        /* 增加陰影 */
    }



    .hamburger {
        display: block;
        font-size: 28px;
        color: white;
        cursor: pointer;
    }

    .nav-links.show {
        display: flex;
        max-height: 300px;
        opacity: 1;
    }

    .custom-navbar .nav-links a {
        padding: 8px 0;
        font-size: 16px;
    }

    .custom-navbar .nav-links a:hover {
        text-decoration: none;
        color: #FFF !important;
    }

    /* ====== About Card 響應式（維持原寬高但改直排）====== */
    .card-grid {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }

    .about-card {
        width: 459px;
        /* ✅ 保持原本寬度 */
        height: 250px;
        /* ✅ 保持原本高度 */
        padding: 40px;
        flex-shrink: 0;
    }

    /* ====== Integration Card 響應式（左右改上下）====== */
    .integration-card,
    .integration-image {
        display: flex;
        flex-direction: column;
        width: 100%;
        max-width: 100%;
        padding: 20px;
        gap: 20px;
        height: 200px;

    }

    .integration-card .card-left {
        margin-top: 20px;
        order: 1;
        width: 100%;
        text-align: center;
    }

    .integration-card .card-right {
        order: 2;
        width: 100%;
        text-align: center;
        margin-bottom: 20px;
    }

    /* 可選：整個系統整合區塊縮排 */
    .integration-section {
        padding: 20px;
        max-width: 960px;
        margin: 0 auto;
        /* ✅ 置中 */
    }

    .contact-cta {
        height: 220px;
        /* padding: 10px; */
    }

}

/* 回到頂端按鈕樣式 */
.back-to-top {
    position: fixed;
    bottom: 45px;
    right: 45px;
    width: 60px;
    height: 60px;
    background-color: #3BC4E0;
    color: #fff;
    font-size: 24px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
    display: none;
    /* 預設隱藏 */
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
    opacity: 0.9;
}