:root {
    --primary-color: #ffffff;
    --background-color: #0a0a0a;
    --text-color: #ffffff;
    --accent-color: #00ffd5;
    --secondary-accent: #ff3366;
    --search-bg-color: rgba(255, 255, 255, 0.1);
    --search-focus-bg-color: rgba(255, 255, 255, 0.15);
    --placeholder-color: rgba(255, 255, 255, 0.5);
    --accent-hover-color: rgba(0, 255, 213, 1);
    --primary-glow: rgba(0, 255, 213, 0.8);    /* 主要发光色 */
    --secondary-glow: rgba(0, 255, 213, 0.6);  /* 提高次要发光色的透明度 */
    --input-bg: rgba(13, 20, 24, 0.7);         /* 输入框背景色 */
    --input-hover-bg: rgba(16, 24, 29, 0.8);   /* 输入框悬停背景色 */
    --text-primary: rgba(255, 255, 255, 0.9);  /* 主要文本色 */
    --text-secondary: rgba(255, 255, 255, 0.5); /* 次要文本色 */
    --border-color: rgba(0, 255, 213, 0.2);    /* 边框颜色 */
    --icon-color: rgba(0, 255, 213, 0.9);      /* 新增：图标颜色 */
}

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

body {
    background: var(--background-color);
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.section {
    height: 100vh;
    width: 100vw;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #0a0a0a;
    background-image: url('https://images.unsplash.com/photo-1519681393784-d120267933ba?q=80&w=2070');
    background-size: cover;
    background-position: center;
    animation: backgroundMove 30s linear infinite;
}

/* 居中内容容器 */
.content-center {
    position: fixed;
    top: 12%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 100;
    width: 90%;
    max-width: 1200px;
}

/* 更新后的 logo 样式 */
.logo {
    font-size: 5.5rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    letter-spacing: 2px;
    cursor: pointer;
}

.logo-text {
    display: inline-block;
    position: relative;
    color: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

/* Logo 悬停效果 */
.logo:hover .logo-text {
    animation: none; /* 清除其他动画 */
    transform: translateY(-20px);
    color: #ffffff;
    text-shadow: 
        0 0 10px rgba(0, 255, 213, 0.4),
        0 0 20px rgba(0, 255, 213, 0.3),
        0 0 30px rgba(0, 255, 213, 0.2),
        0 0 40px rgba(0, 255, 213, 0.1);
    filter: brightness(1.2);
}

/* Logo 文字依次跳动动画 */
.logo:hover .logo-text {
    animation: none; /* 先清除可能存在的动画 */
    transform: translateY(0);
}

.logo:hover .logo-text:nth-child(1) { transition-delay: 0.1s; }
.logo:hover .logo-text:nth-child(2) { transition-delay: 0.2s; }
.logo:hover .logo-text:nth-child(3) { transition-delay: 0.3s; }
/* ... 继续设置其他字母的延迟，直到第15个字母 */
.logo:hover .logo-text:nth-child(15) { animation-delay: 0.7s; }

/* 基础跳动动画 */
@keyframes jumpSequence {
    0% {
        transform: translateY(0);
        filter: brightness(1);
    }
    50% {
        transform: translateY(-20px) scale(1.1);
        filter: brightness(1.3);
        text-shadow: 
            0 0 15px rgba(0, 255, 213, 0.5),
            0 0 25px rgba(0, 255, 213, 0.4),
            0 0 35px rgba(0, 255, 213, 0.3);
    }
    100% {
        transform: translateY(0);
        filter: brightness(1);
    }
}

/* 最后字母的五连跳动画 */
@keyframes fiveJumps {
    0% { 
        transform: translateY(0);
        filter: brightness(1);
    }
    
    /* 第一跳 - 最高 */
    12% { 
        transform: translateY(-20px) scale(1.1);
        filter: brightness(1.3);
    }
    18% { 
        transform: translateY(0) scale(1);
        filter: brightness(1);
    }
    
    /* 第二跳 */
    30% { 
        transform: translateY(-15px) scale(1.08);
        filter: brightness(1.25);
    }
    36% { 
        transform: translateY(0) scale(1);
        filter: brightness(1);
    }
    
    /* 第三跳 */
    48% { 
        transform: translateY(-10px) scale(1.06);
        filter: brightness(1.2);
    }
    54% { 
        transform: translateY(0) scale(1);
        filter: brightness(1);
    }
    
    /* 第四跳 */
    66% { 
        transform: translateY(-7px) scale(1.04);
        filter: brightness(1.15);
    }
    72% { 
        transform: translateY(0) scale(1);
        filter: brightness(1);
    }
    
    /* 第五跳 */
    84% { 
        transform: translateY(-4px) scale(1.02);
        filter: brightness(1.1);
    }
    90% { 
        transform: translateY(0) scale(1);
        filter: brightness(1);
    }
    
    100% { 
        transform: translateY(0);
        filter: brightness(1);
    }
}

/* 搜索框容器 */
.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    z-index: 1;
}

/* 搜索输入框 */
.search-input {
    width: 100%;
    height: 60px;
    padding: 0 70px 0 30px;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(0, 255, 213, 0.1);
}

.search-input:hover {
    background: var(--input-hover-bg);
    border-color: rgba(0, 255, 213, 0.3);
}

.search-input:focus {
    outline: none;
    background: var(--input-hover-bg);
    border-color: var(--primary-glow);
    box-shadow: 
        0 0 20px rgba(0, 255, 213, 0.15),
        inset 0 0 10px rgba(0, 255, 213, 0.05);
}

.search-input::placeholder {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 发送按钮 */
.send-button {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: auto;
    height: 40px;
    padding: 0 15px;
    border: none;
    background: rgba(0, 255, 213, 0.2);
    color: rgba(0, 255, 213, 0.8);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
    letter-spacing: 1px;
}

/* 按钮悬停效果 */
.send-button:hover {
    background: rgba(0, 255, 213, 0.3);
    color: rgba(0, 255, 213, 1);
    transform: translateY(-50%) scale(1.05);
}

/* 按钮点击效果 */
.send-button:active {
    transform: translateY(-50%) scale(0.95);
}

/* 调整输入框右侧间距 */
.search-input {
    padding-right: 90px;
}

/* Logo 动画效果 */
.logo:hover .logo-text {
    animation: bounce 0.5s ease forwards;
    color: var(--text-color);
}

/* 为所有字母设置动画延迟 */
.logo:hover .logo-text:nth-child(1) { animation-delay: 0.0s; }
.logo:hover .logo-text:nth-child(2) { animation-delay: 0.05s; }
.logo:hover .logo-text:nth-child(3) { animation-delay: 0.1s; }
/* ... 继续设置其他字母的延迟，直到第15个字母 */
.logo:hover .logo-text:nth-child(15) { animation-delay: 0.7s; }

@keyframes bounce {
    0% { transform: translateY(0); }
    25% { 
        transform: translateY(-15px) rotate(5deg);
        color: var(--accent-color);
    }
    50% { 
        transform: translateY(0) rotate(0deg);
        color: var(--text-color);
    }
    75% { 
        transform: translateY(-7px) rotate(-3deg);
        color: var(--accent-color);
    }
    100% { 
        transform: translateY(0) rotate(0deg);
        color: var(--text-color);
    }
}

.logo .logo-text {
    animation: float-subtle 3s ease-in-out infinite;
    opacity: 0.9;
    text-shadow: 0 0 10px var(--accent-color),
                 0 0 20px var(--accent-color),
                 0 0 30px var(--accent-color);
}

@keyframes float-subtle {
    0% { transform: translateY(0); }
    50% { 
        transform: translateY(-3px);
        opacity: 1;
    }
    100% { 
        transform: translateY(0);
        opacity: 0.9;
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .logo {
        font-size: 4.5rem;
    }
    
    .search-container {
        max-width: 700px;
    }
}

@media (max-width: 768px) {
    .logo {
        font-size: 3.5rem;
    }
    
    .search-container {
        flex-direction: column;
        gap: 1rem;
        margin-top: 4rem;
        padding: 0 20px;
    }
    
    .search-input {
        height: 50px;
        font-size: 16px;
    }
    
    .send-button {
        height: 50px;
        font-size: 16px;
        width: 100%;
    }
}

/* 添加微妙的背景动画 */
.section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        circle at 50% 30%,
        rgba(0, 255, 213, 0.05) 0%,
        transparent 70%
    );
    pointer-events: none;
}

/* 添加背景动画 */
@keyframes backgroundMove {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 800px 800px;
    }
}

/* 添加渐变叠加 */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(10,10,10,0.8) 0%,
        rgba(10,10,10,0.6) 50%,
        rgba(10,10,10,0.8) 100%
    );
    pointer-events: none;
}

/* 添加微妙的光晕效果 */
.section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        circle at 50% 30%,
        rgba(0, 255, 213, 0.05) 0%,
        transparent 70%
    );
    pointer-events: none;
}

/* 添加文字淡出和淡入动画 */
@keyframes fadeOutText {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-10px);
    }
}

@keyframes fadeInPlaceholder {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-input.fade-out {
    animation: fadeOutText 0.5s ease forwards;
}

.search-input.fade-in {
    animation: fadeInPlaceholder 0.5s ease forwards;
}

/* 添加背景渐变，使 logo 更容易辨认 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.7) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.7) 100%
    );
    z-index: -1;
    pointer-events: none;
}

/* 调整 logo 容器样式 */
.logo-container {
    position: relative;
    z-index: 1;
}

/* 添加一个内容包装器来控制整体位置 */
.content-wrapper {
    position: relative;
    z-index: 1;
    padding-top: 150px; /* 增加顶部间距 */
}

/* Logo 样式调整 */
.logo {
    font-size: 5.5rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    margin-bottom: 4rem; /* 增加与搜索框的间距 */
    letter-spacing: 2px;
    cursor: pointer;
}

/* 搜索框容器位置调整 */
.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    z-index: 1;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .content-wrapper {
        padding-top: 100px; /* 移动端顶部间距稍小 */
    }
    
    .logo {
        margin-bottom: 3rem; /* 移动端间距稍小 */
    }
}

/* 发送按钮点击效果 */
.send-button:active {
    transform: translateY(-50%) scale(0.95);
}

/* 确保动画期间输入框保持禁用状态的样式 */
.search-input:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}