:root {
            --primary-color: #0f172a; 
            --accent-color: #06b6d4; 
            --text-color: #334155;
            --light-bg: #f8fafc;
            --white: #ffffff;
            --transition: all 0.4s ease;
        }


        h1, h2, h3 {
            font-weight: 700;
            line-height: 1.3;
        }

        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 20px;
        }

        

        /* === Hero Section (首頁大圖 - 已加入背景圖片) === */
        .hero {
            height: 100vh;
            background: url(../images/bi_main1.png) no-repeat center center; 
            background-size: cover;
            background-attachment: fixed; /* 讓背景圖片固定，產生視差滾動效果 */
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            position: relative;
        }
        .hero h1 label {
            display: inline-block;
        }
        .hero h1 label::after {
            content: ' - ';
            margin: 0 .5em;
        }
        .hero h1 {
            margin: 0 1.5rem 1rem;
        }
        .btn-scroll {
            display: block;
            text-align: center;
            color: var(--white);
            font-size: 2rem;
            animation: bounce 2s infinite;
            cursor: pointer;
            text-decoration: none;
            opacity: 0.8;
        }
        
        .btn-scroll:hover {
            opacity: 1;
            color: var(--accent-color);
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
            40% {transform: translateY(-10px);}
            60% {transform: translateY(-5px);}
        }

        /* === Section Styles === */
        section {
            padding: 100px 0;
        }

        .solutions-section {
            background-color: var(--light-bg);
        }

        .kpi {
            display: block;
            width: 45%;

        }
        .kpi .level {
            display: flex;
            margin: .5em;
            padding: 10px 20px;
            border-radius: 10px;
            border: 1px solid #165d8ba1;
            background-color: #01315aab;
            align-items: center;
        }
        .kpi .level h3 {
            font-size: 1.15em;
            margin: 0;
            font-weight: 500;
        }
        .kpi .level p {
            color: #9aaab7;
            line-height: 1.35;
        }
        .kpi .level img {
            width: 5em;
            height: auto;
            border-radius: 5px;
            margin: 0 10px 0 0;
        }
        .kpi > p {
            font-size: 1.2em;
        }

        #design.services-section {
            background-color: #f6fbff;
        }
        #design .service-card p {
            color: #6e839b;
            font-size: 1.2rem;
        }

        #design .container {
            width: 1366px;
            height: 600px;
            max-width: initial;
            display: flex;
            align-items: center;
            justify-content: space-between;
            overflow: hidden;
            position: relative
        }

        #design .text-section {
            flex: 0 0 40%;
            z-index: 10;
        }

        #design h1 {
            font-size: 3rem;
            line-height: 1.35;
            margin-bottom: 10px;
            font-weight: 700;
            color: #1a1a1a;
        }
        #design h1 label {
            color: #0372e8;
        }
        #design h1 span {
            display: block;
            font-size: 2.5rem;
            padding: 0 1em 0 0;
        }

        #design .subtitle {
            font-size: 1.35rem;
        }
        #design .graphic-section {
            flex: 1;
            height: 100%;
            position: relative;
        }

        #design .main-image-circle {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            overflow: hidden;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1;
        }

        #design .main-image-circle img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        #design .bubble {
            position: absolute;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            padding: 20px;
            /* transition: transform 0.3s ease; */
            transition: var(--transition);
        }

        #design .bubble:hover {
            transform: scale(1.05);
        }

        #design .bubble h3 {
            font-size: 1.5rem;
            margin: 5px 0;
        }

        #design .bubble p {
            font-size: 1.1rem;
            line-height: 1.4;
        }

        #design .bubble.blue {
            width: 260px;
            height: 260px;
            background-color: #1a71e3;
            color: white;
            z-index: 5; 
            left: 175px; 
            top: 50%;
            transform: translateY(-50%);
            box-shadow: 0 15px 35px rgba(26, 90, 255, 0.4);
        }

        #design .bubble.blue:hover {
            transform: translateY(-50%) scale(1.05);
        }

        #design .bubble.white {
            width: 240px;
            height: 240px;
            background-color:#ffffffa1;
            color: #333;
            z-index: 4;
        }
        
        #design .bubble img {
            width: 60px;
        }

        #design .bubble.top {
            top: 5%;
            left: 380px;
        }

        #design .bubble.right {
            top: 50%;
            right: 0;
            transform: translateY(-50%);
        }
        #design .bubble.right:hover {
             transform: translateY(-50%) scale(1.05);
        }

        #design .bubble.bottom {
            bottom: 5%;
            left: 380px;
        }

        /* === RWD Media Queries === */
        
        @media (max-width: 1366px) {
            .btn-scroll {
                position: relative!important;
                top: -55px!important;
            }
            .hero h1 {
                font-size: 2.5em !important;
                margin: 2em 0 0 !important;
            }
            html[lang="en"] .kpi {
                width: 65%;
            }
            html[lang="en"] .hero h1 {
                font-size: 2.2em !important;
                margin-bottom: 10px !important;
            }
            html[lang="en"] .hero h1 label {
                margin-right: 10px !important;
            }
           
            html[lang="en"] #design .bubble h3 {
                font-size: 1.2rem;
            }
            html[lang="en"] .btn-scroll {
                top: 0px !important;
            }
            html[lang="en"] #design .bubble p {
                font-size: 1rem;
                line-height: 1.4;
                margin: 0;
            }
        }

        @media (min-width: 992px) {
            .solution-flow::before {
                display: block;
            }
        }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2.5rem; }
            .solution-flow { flex-direction: column; gap: 60px; margin-top: 50px;}
            .circle-icon { margin-top: -70px; width: 80px; height: 80px; font-size: 1.8rem;}
        }
        @media screen and (max-width:576px) {
            header h1 {
                text-align: center;
                letter-spacing: 1px!important;
            }
            header h1 > label {
                font-size: 1.2rem;
                display: block;
                font-weight: 400;
            }
            .kpi {
                display: flex;
                width: 100%!important;
                flex-direction: column;
            }
            .hero {
                height: auto;
                padding: 0 0 2em;
            }
            #design .subtitle {
                font-size: 18px;
                width: 100%;
                margin-bottom: 1em;
            }
            #design h1 {
                font-size: 1.75em!important;
                margin-bottom: 10px;
                max-width: 82%;
            }
            #design .container {
                flex-direction: column !important;
                height: auto;
                width: initial;
                align-items: initial;
            }
            
            .detect {
                display: none;
            }
            #design {
                padding: 10% 0;
            }
            #design .main-image-circle {
                position: initial;
                width: initial;
                height: initial;
                border-radius: initial;
                overflow: initial;
                transform: initial!important;
            }
            .main-image-circle.reveal.active {
                display: none;
            }
            #design .bubble {
                position: initial;
                width: initial !important;
                height: initial !important;
                border-radius: initial;
                color: initial !important;
                background-color: initial !important;
                transform: initial !important;
                padding: 5px 0;
                box-shadow: none !important;
            }
            #design .bubble::after {
                content: '';
                width: 90%;
                height: 1px;
                margin: 5% 0;
                border-bottom: 1px dashed #a8d5fd;
            }
            #design .bubble:last-child::after {
                display: none;
            }
            section {
                padding: 10% 0;
            }
            #design h1 span {
                padding: 0;
                font-size: 1.75rem!important;
            }
            #design h1 {
                max-width: initial;
            }
            .kpi .level {
                align-items: center;
                flex-direction: column;
                flex-wrap: nowrap;
            }
            .kpi .level h3 {
                font-size: 1.35em;
                margin: .5em;
                text-align: center;
            }
            .hero-content p {
                width: 100% !important;
                font-size: 1.1rem;
                color: #fff!important;
            }
            html[lang="en"] .hero h1 label {
                margin-right: 0!important;
                display: block!important;
            }
            html[lang="en"] #design .subtitle {
                font-size: 1rem!important;
            }
            .hero h1 label::after {
                display: none;
            }
        }