* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Helvetica', sans-serif;
    overflow-x: hidden;
    background: #000;
    color: #fff;
}

/* 首屏全屏主图 */
.hero-section {
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('/images/images/pexels-pixabay-206369.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    opacity: 0;
    animation: fadeInUp 2s ease-out 0.5s forwards;
}

.hero-title {
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
    margin-bottom: 1rem;
    color: #fff;
    font-family: 'Arial Black', sans-serif;
}

.hero-subtitle {
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    opacity: 0.8;
    font-weight: 300;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
    cursor: pointer;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    opacity: 0.7;
}

/* 第二屏 ENTER 区域 */
.enter-section {
    min-height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('/images/images/ChatGPTImage.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.enter-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.enter-content {
    position: relative;
    z-index: 2;
    text-align: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease-out;
}

.enter-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.enter-title {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    margin-bottom: 4rem;
    color: #8B4A8B;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
    font-family: serif;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    from {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8), 0 0 20px rgba(139, 74, 139, 0.3);
    }
    to {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8), 0 0 30px rgba(139, 74, 139, 0.6);
    }
}

.enter-button {
    display: inline-block;
    width: 420px;
    height: 280px;
    background-image: url('/images/images/biankuan.png');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    background-position: center;
    color: #fff;
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.2;
    animation: buttonPulse 3s ease-in-out infinite alternate;
    padding-top: 20px;
}

.enter-button .main-text {
    font-size: 2.4rem;
    transform: translateY(-10px);
    margin-bottom: 10px;
    font-weight: bold;
    animation: enterPulse 2s ease-in-out infinite alternate;
}

.enter-button .sub-text {
    font-size: 1rem;
    padding: 4px 16px;
    transform: translateY(5px);
    background: rgba(139, 74, 139, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    backdrop-filter: blur(3px);
    box-shadow: 0 0 10px rgba(139, 74, 139, 0.4);
}

/* 可选:ENTER 呼吸动画 */
@keyframes enterPulse {
    0% { transform: scale(1); opacity: 0.9; }
    100% { transform: scale(1.03); opacity: 1; }
}

@keyframes buttonPulse {
    from {
        filter: brightness(1) drop-shadow(0 0 10px rgba(192, 192, 192, 0.3));
    }
    to {
        filter: brightness(1.1) drop-shadow(0 0 20px rgba(192, 192, 192, 0.6));
    }
}

.enter-button:hover {
    transform: scale(1.05);
    filter: brightness(1.2) drop-shadow(0 0 25px rgba(192, 192, 192, 0.8));
}

.enter-button .main-text {
    font-size: 2rem;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    margin-bottom: 5px;
    animation: textShimmer 2s ease-in-out infinite alternate;
}

@keyframes textShimmer {
    from { opacity: 0.9; }
    to { opacity: 1; }
}

.enter-button .sub-text {
    font-size: 0.9rem;
    color: #E8E8E8;
    background: rgba(139, 74, 139, 0.7);
    padding: 2px 12px;
    border-radius: 12px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(192, 192, 192, 0.5);
}

/* 装饰性元素 */
.decorative-line {
    width: 150px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #C0C0C0, #E8E8E8, #C0C0C0, transparent);
    margin: 3rem auto;
    opacity: 0.8;
    border-radius: 1px;
    animation: lineShimmer 3s ease-in-out infinite;
}

@keyframes lineShimmer {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* 动画定义 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
        letter-spacing: 0.2em;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .enter-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .enter-button {
        width: 300px;
        height: 100px;
        font-size: 1.5rem;
    }

    .enter-button .main-text {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
        letter-spacing: 0.1em;
    }

    .enter-title {
        font-size: 1.5rem;
    }

    .enter-button {
        width: 250px;
        height: 80px;
        font-size: 1.2rem;
    }

    .enter-button .main-text {
        font-size: 1.5rem;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}