/* CSS Variables */
        :root {
            --color-bg: #0f172a;
            /* slate-900 */
            --color-primary: #1e293b;
            /* slate-800 */
            --color-accent: #f97316;
            /* orange-500 */
            --color-text-main: #f8fafc;
            /* slate-50 */
            --color-text-muted: #94a3b8;
            /* slate-400 */
        }

        body {
            font-family: 'Noto Sans TC', sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text-main);
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        .serif-text {
            font-family: 'Noto Serif TC', serif;
        }

        /* 滾動進度條 */
        #progress-bar {
            position: fixed;
            top: 0;
            left: 0;
            height: 4px;
            background: linear-gradient(to right, #f97316, #fbbf24);
            z-index: 100;
            width: 0%;
            transition: width 0.1s;
        }

        /* 背景光暈 (Gradient Blobs) */
        .blob {
            position: absolute;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.4;
            border-radius: 50%;
            animation: float 10s infinite ease-in-out alternate;
        }

        .blob-1 {
            top: -10%;
            left: -10%;
            width: 50vw;
            height: 50vw;
            background: radial-gradient(circle, rgba(249, 115, 22, 0.3) 0%, rgba(0, 0, 0, 0) 70%);
        }

        .blob-2 {
            bottom: -10%;
            right: -10%;
            width: 60vw;
            height: 60vw;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.2) 0%, rgba(0, 0, 0, 0) 70%);
            animation-delay: -5s;
        }

        @keyframes float {
            0% {
                transform: translate(0, 0) scale(1);
            }

            100% {
                transform: translate(30px, 50px) scale(1.1);
            }
        }

        /* 玻璃擬物化 (Glassmorphism) */
        .glass-card {
            background: rgba(30, 41, 59, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        }

        /* 滾動漸入動畫 (Scroll Reveal) */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
        }

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

        .delay-100 {
            transition-delay: 0.1s;
        }

        .delay-200 {
            transition-delay: 0.2s;
        }

        .delay-300 {
            transition-delay: 0.3s;
        }

        .delay-400 {
            transition-delay: 0.4s;
        }

        /* 時間軸專屬樣式 (Timeline) */
        .timeline-container {
            border-left: 2px solid rgba(255, 255, 255, 0.1);
            margin-left: 1rem;
            padding-left: 2.5rem;
            position: relative;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 3rem;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: -3.3rem;
            top: 0;
            width: 1.75rem;
            height: 1.75rem;
            background: var(--color-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: bold;
            color: #fff;
            box-shadow: 0 0 15px rgba(249, 115, 22, 0.6);
            border: 3px solid var(--color-bg);
        }

        /* 大型浮水印文字 */
        .watermark {
            position: absolute;
            font-size: 10rem;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.02);
            z-index: 0;
            pointer-events: none;
            user-select: none;
            line-height: 1;
        }

        /* 引言區塊 */
        .quote-block {
            position: relative;
            padding: 2rem;
            background: linear-gradient(135deg, rgba(249, 115, 22, 0.1) 0%, rgba(0, 0, 0, 0) 100%);
            border-left: 4px solid var(--color-accent);
            border-radius: 0 1rem 1rem 0;
            margin-bottom: 2rem;
        }

        .quote-block i {
            position: absolute;
            top: 1rem;
            left: 1rem;
            font-size: 3rem;
            color: rgba(249, 115, 22, 0.2);
        }

        /* 燈箱圖片懸停效果 */
        .lightbox-trigger {
            cursor: pointer;
        }

        .lightbox-overlay-icon {
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .lightbox-trigger:hover .lightbox-overlay-icon {
            opacity: 1;
        }

        /* 在某些瀏覽器（如舊版 Safari）上還是看不出效果  */
        #navbar,
        #mobile-menu {
            -webkit-backdrop-filter: blur(20px);
        }