html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100vh;
    font-size: 130%;
}

/* 專案卡片特效 */
.portfolio-card {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-card .overlay {
    opacity: 0;
    transition: all 0.3s ease-in-out;
}

.portfolio-card:hover .overlay {
    opacity: 1;
}

.portfolio-card img {
    transition: transform 0.7s ease;
}

.portfolio-card:hover img {
    transform: scale(1.08);
}

/* 模式切換淡入動畫 */
.fade-in-section {
    animation: fadeInSection 0.5s ease-out forwards;
}

@keyframes fadeInSection {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

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

/* Loading 特效 */
#page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
    height: 100vh;
}

.loader-cube {
    width: 50px;
    height: 50px;
    position: relative;
    transform-style: preserve-3d;
    animation: spinCube 2s infinite cubic-bezier(0.4, 0, 0.2, 1);
}

.loader-cube .face {
    position: absolute;
    width: 50px;
    height: 50px;
    background: rgba(15, 76, 129, 0.85);
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 15px rgba(15, 76, 129, 0.2);
}

.loader-cube .front {
    transform: translateZ(25px);
}

.loader-cube .back {
    transform: rotateY(180deg) translateZ(25px);
}

.loader-cube .right {
    transform: rotateY(90deg) translateZ(25px);
}

.loader-cube .left {
    transform: rotateY(-90deg) translateZ(25px);
}

.loader-cube .top {
    transform: rotateX(90deg) translateZ(25px);
}

.loader-cube .bottom {
    transform: rotateX(-90deg) translateZ(25px);
}

@keyframes spinCube {
    0% {
        transform: rotateX(0deg) rotateY(0deg);
    }

    100% {
        transform: rotateX(360deg) rotateY(360deg);
    }
}

/* 導覽列與滾動特效 */
.nav-link {
    position: relative;
    padding-bottom: 6px;
    color: #475569;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #0f4c81;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: #0f4c81;
    transition: all 0.3s ease-in-out;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.5, 0, 0, 1), transform 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-up.active {
    opacity: 1;
    transform: translateY(0);
}

/* 客戶垂直頁籤自訂樣式 */
.client-tab-btn.active {
    background-color: #0f4c81;
    color: white;
    border-color: #0f4c81;
}

.client-tab-btn.active:hover {
    background-color: #1a5fa0;
}

.client-tab-btn.active .client-badge {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

/* 首頁 3D 動態底圖特效 */
@keyframes float3D {
    0% {
        transform: scale(1.0) rotate(0deg);
    }

    50% {
        transform: scale(1.05) rotate(0.5deg);
    }

    100% {
        transform: scale(1.0) rotate(0deg);
    }
}

.animate-float-3d {
    animation: float3D 25s ease-in-out infinite;
    will-change: transform;
}

/* 客戶信任牆跑馬燈動畫 */
@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

.animate-marquee {
    display: flex;
    width: max-content;
    animation: marquee 35s linear infinite;
}

.marquee-container:hover .animate-marquee {
    animation-play-state: paused;
}

/* 服務卡片 Hover 浮動效果 */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

/* --- 升級：系統類型 3D 網格矩陣特效 (全部攤開) --- */
.sys-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 2rem 1rem;
    margin: 0;
    gap: 1.5rem;
    perspective: 1200px;
}

.sys-card-3d {
    flex: 0 0 auto;
    width: 280px;
    max-width: 100%;
    min-height: 180px;
    background: #ffffff;
    border-radius: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.5s ease, box-shadow 0.5s ease, border-color 0.5s ease;
    position: relative;
    cursor: pointer;
}

/* 強制系統名稱維持單行 */
.sys-card-3d>div.font-bold {
    white-space: nowrap;
}

/* 讓文字與圖示在 3D 卡片中浮起 */
.sys-card-3d>* {
    transform: translateZ(30px);
    transition: transform 0.5s ease;
}

/* 桌面端的 3D 懸停聯動特效 (網格攤開版) */
@media (hover: hover) and (pointer: fine) {

    /* 1. 當滑鼠進入該「陣列區域」時，全部卡片微幅後仰並變暗 */
    .sys-row:hover .sys-card-3d {
        transform: rotateX(10deg) translateZ(-20px) scale(0.95);
        opacity: 0.6;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
    }

    /* 2. 當滑鼠停在「特定卡片」時，該卡片彈出、放大並發光 */
    .sys-row .sys-card-3d:hover {
        transform: rotateX(0deg) translateZ(50px) scale(1.1) translateY(-10px);
        opacity: 1;
        z-index: 20;
        box-shadow: 0 25px 50px rgba(15, 76, 129, 0.15);
        border-color: #0f4c81;
        background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    }

    /* 3. 懸停卡片內的內容浮得更高 */
    .sys-row .sys-card-3d:hover>* {
        transform: translateZ(40px);
    }
}