/* ================= 首屏（Hero） ================= */
.bg img {
    width: 100%;
    height: 100vh;
    object-fit: cover;
}

.poetic-text-container {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    width: 100%;
}

.poetic-line {
    font-family: "AlphaCentauri", "Courier New", monospace !important;
    color: #fff;
    text-shadow: 0 0 15px #0ff, 0 0 30px #0ff;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
}

.poetic-line.line-1, .poetic-line.line-2 {
    font-size: clamp(1.5rem, 3vw, 3rem);
}

.poetic-line.line-3 {
    font-size: clamp(2rem, 4vw, 4rem);
    letter-spacing: 2vh;
    writing-mode: vertical-rl;
    margin-top: -10vh;
}

/* 滚动提示 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 20;
    opacity: 0;
    animation: scroll-fade-in 1s ease 4s forwards;
}

@keyframes scroll-fade-in {
    to { opacity: 1; }
}

.scroll-text {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: rgba(0, 255, 255, 0.6);
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(0, 255, 255, 0.6), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* 鼠标拖影图片 */
.mouse-trail-image {
    position: absolute;
    width: 320px;
    height: 320px;
    object-fit: cover;
    border-radius: 12px;
    pointer-events: none;
    z-index: 9999;
    opacity: 1;
    transition: opacity 2s cubic-bezier(0.25, 1, 0.5, 1), transform 2s cubic-bezier(0.25, 1, 0.5, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

#plane {
    color: #fff;
    font-size: 70px;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 50;
}