/* --- 1. 基础设定 --- */
html, body {
    margin: 0;
    padding: 0;
    background-color: #030305; /* 沿用主页极黑 */
    color: #fff;
    font-family: 'Manrope', sans-serif;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* noise @gemini */
.noise-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 10;
}
/* back */
.btn-back {
    position: fixed;
    top: 3rem;
    left: 3rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 1rem;
    letter-spacing: 0.2em;
    z-index: 20;
    transition: color 0.3s ease;
}
.btn-back:hover { color: #fff; }

/* --- 2. word stack --- */
.archive-wrapper {
    text-align: center;
    z-index: 5;
}

.reveal-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

/* Manrope  */
.reveal-stack > * {
    margin: 0;
    letter-spacing: 0.5em;
    font-weight: 300;
    transition: all 1s ease;
}

/* --- 3. 亮度与权重的梯级消失 --- */


.text-level-1 {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 2.3rem;
    opacity: 1;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}


.text-level-2 {
    font-size: 1.4rem;
    opacity: 0.7;
    font-weight: 400;
    letter-spacing: 0.8em;
}


.text-level-3 { font-size: 1.2rem; opacity: 0.6; filter: blur(0.5px); }
.text-level-4 { font-size: 1.1rem; opacity: 0.50; filter: blur(1px); }
.text-level-5 { font-size: 1.0rem; opacity: 0.40; filter: blur(1.3px); }
.text-level-6 { font-size: 0.9rem; opacity: 0.32; filter: blur(1.8px); }
.text-level-7 { font-size: 0.8rem; opacity: 0.2; filter: blur(2px); }
.text-level-8 { font-size: 0.7rem; opacity: 0.1; filter: blur(2.4px); }
.text-level-9 { font-size: 0.6rem; opacity: 0.05; filter: blur(2.9px); }


@keyframes fadeInUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); }
}

.reveal-stack {
    animation: fadeInUp 2.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}