/* 导入Google字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* 根元素设置 - 彻底防止缩放问题 */
:root {
    /* 基础字体大小 - 使用rem单位 */
    --base-font-size: 16px;
    --base-spacing: 1rem;
    --base-border-radius: 1.25rem;
    
    /* 响应式断点 */
    --mobile-breakpoint: 480px;
    --tablet-breakpoint: 768px;
    --desktop-breakpoint: 1024px;
    
    /* 颜色变量 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.7);
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-hover: rgba(255, 255, 255, 0.15);
}

/* 基础重置 - 彻底防止缩放 */
html {
    /* 强制设置基础字体大小 */
    font-size: 16px;
    /* 防止iOS自动调整字体大小 */
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    /* 防止横竖屏切换时缩放 */
    orientation: portrait;
    /* 确保滚动条不出现 */
    overflow-x: hidden;
    /* 防止弹性滚动 */
    overscroll-behavior-x: none;
}

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

/* body设置 - 彻底防止缩放 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--base-font-size);
    line-height: 1.6;
    font-weight: 400;
    color: var(--text-primary);
    background: var(--primary-gradient);
    /* 强制设置视口 */
    width: 100vw;
    height: 100vh;
    height: 100dvh; /* 动态视口高度 */
    min-height: 100vh;
    min-height: 100dvh;
    max-width: 100vw;
    overflow-x: hidden;
    overflow-y: auto;
    margin: 0;
    padding: 0;
    position: relative;
    /* 防止移动端缩放 */
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    /* 防止双击缩放 */
    -webkit-tap-highlight-color: transparent;
    /* 确保背景固定 */
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 移动端专用缩放控制 */
@media screen and (max-width: 768px) {
    html {
        /* 强制16px基础字体 */
        font-size: 16px !important;
        -webkit-text-size-adjust: 100% !important;
        -ms-text-size-adjust: 100% !important;
    }
    
    body {
        /* 防止iOS Safari缩放 */
        -webkit-text-size-adjust: 100% !important;
        /* 防止Android缩放 */
        text-size-adjust: 100% !important;
        /* 固定宽度防止缩放 */
        width: 100vw !important;
        min-width: 100vw !important;
        max-width: 100vw !important;
        /* 防止弹性滚动 */
        overscroll-behavior: none;
    }
}

/* iOS Safari专用 */
@supports (-webkit-touch-callout: none) {
    body {
        -webkit-text-size-adjust: 100% !important;
        -webkit-tap-highlight-color: transparent;
        -webkit-user-select: none;
    }
}

/* 背景增强 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: 
        radial-gradient(circle at 20% 30%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(120, 219, 255, 0.2) 0%, transparent 70%);
    z-index: -2;
    animation: backgroundShift 20s ease-in-out infinite alternate;
    pointer-events: none;
    transform: translateZ(0);
    will-change: transform;
}

@keyframes backgroundShift {
    0% { 
        transform: scale(1) rotate(0deg); 
        opacity: 0.8;
    }
    50% { 
        transform: scale(1.1) rotate(5deg); 
        opacity: 1;
    }
    100% { 
        transform: scale(1) rotate(-5deg); 
        opacity: 0.8;
    }
}

/* 背景动画 */
.bg-animation {
    position: fixed !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    top: 0 !important;
    left: 0 !important;
    /* 放在更下面，确保几何背景在上面但仍在内容后面 */
    z-index: -2 !important;
    opacity: 0.35 !important;
    pointer-events: none !important;
    overflow: hidden !important;
    transform: translateZ(0);
    will-change: transform;
}

.bg-animation span {
    position: absolute !important;
    display: block !important;
    background: rgba(255, 255, 255, 0.2) !important;
    animation: move 25s linear infinite !important;
    bottom: -150px !important;
    transform: translateZ(0);
    will-change: transform;
}

/* 几何背景 */
.geometric-bg {
    position: fixed !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    top: 0 !important;
    left: 0 !important;
    z-index: -1 !important;
    overflow: hidden !important;
    pointer-events: none !important;
    transform: translateZ(0);
    will-change: transform;
}

.geo-shape {
    position: absolute !important;
    opacity: 0.1 !important;
    animation: float 20s infinite ease-in-out !important;
    pointer-events: none !important;
    transform: translateZ(0);
    will-change: transform;
}

/* 顶部搜索栏 - 彻底修复缩放 */
.top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100vw;
    min-width: 100vw;
    max-width: 100vw;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    padding: 0.9375rem 0; /* 15px */
    animation: slideDown 0.5s ease-out;
    transform: translateZ(0);
}

@keyframes slideDown {
    from { 
        transform: translateY(-100%) translateZ(0); 
        opacity: 0; 
    }
    to { 
        transform: translateY(0) translateZ(0); 
        opacity: 1; 
    }
}

.header-content {
    max-width: 75rem; /* 1200px */
    margin: 0 auto;
    padding: 0 1.25rem; /* 20px */
    padding: 0 3.125vw; /* 响应式内边距 */
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-width: 0;
    width: 100%;
}

/* 搜索容器 - 修复缩放 */
.search-container {
    position: relative;
    flex: 1;
    max-width: 31.25rem; /* 500px */
    max-width: 40vw;
    min-width: 12.5rem; /* 200px */
    width: 100%;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 1.875rem; /* 30px */
    padding: 0.5rem 1.25rem; /* 8px 20px */
    padding: 0.5rem 4vw; /* 响应式内边距 */
    transition: all 0.3s ease;
    transform: translateZ(0);
    width: 100%;
    min-height: 2.75rem; /* 44px 最小触摸目标 */
}

.search-box:focus-within {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 1.25rem rgba(255, 255, 255, 0.1);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1rem; /* 固定16px */
    font-family: inherit;
    padding: 0.3125rem 0; /* 5px */
    line-height: 1.5;
    /* 防止iOS缩放 */
    font-size: 16px !important;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.3125rem; /* 5px */
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    /* 固定大小防止缩放问题 */
    width: 2rem; /* 32px */
    height: 2rem; /* 32px */
    min-width: 2rem;
    min-height: 2rem;
    flex-shrink: 0;
}

.search-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    transform: scale(1.1) translateZ(0);
}

.search-btn span {
    font-size: 1.125rem; /* 18px */
    font-size: clamp(1rem, 3vw, 1.125rem);
    display: block;
}

/* 搜索建议 */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 0.9375rem; /* 15px */
    margin-top: 0.625rem; /* 10px */
    box-shadow: 0 0.625rem 1.875rem rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.625rem) translateZ(0);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    overflow: hidden;
    max-height: 50vh;
    overflow-y: auto;
    z-index: 1001;
}

.search-suggestions.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) translateZ(0);
}

.suggestion-item {
    padding: 0.75rem 1.25rem; /* 12px 20px */
    padding: 0.75rem 4vw;
    color: #2d3436;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 1rem; /* 固定16px */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding-left: calc(4vw + 0.3125rem);
}

/* 导航栏 */
.header-nav {
    display: flex;
    gap: 1.25rem; /* 20px */
    gap: 2vw;
    flex-shrink: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem; /* 14px */
    font-size: clamp(0.75rem, 2vw, 0.875rem);
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem; /* 8px 16px */
    padding: 0.5rem 3vw;
    border-radius: 1.25rem; /* 20px */
    position: relative;
    transform: translateZ(0);
    white-space: nowrap;
    display: flex;
    align-items: center;
    min-height: 2rem; /* 32px */
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-0.125rem) translateZ(0);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.125rem; /* -2px */
    left: 50%;
    width: 0;
    height: 0.125rem; /* 2px */
    background: var(--text-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%) translateZ(0);
}

.nav-link:hover::after {
    width: 80%;
}

/* 主容器 - 彻底修复缩放 */
.main-container {
    text-align: center;
    z-index: 1;
    animation: fadeInUp 1s ease;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    padding-top: 6.25rem; /* 100px */
    padding-top: 15vh; /* 响应式 */
    padding-bottom: 2.5rem; /* 40px */
    transform: translateZ(0);
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 100vw;
    margin: 0 auto;
    width: 100%;
    min-width: 100vw;
}

@keyframes fadeInUp {
    from { 
        opacity: 0; 
        transform: translateY(1.875rem) translateZ(0); /* 30px */
    }
    to { 
        opacity: 1; 
        transform: translateY(0) translateZ(0); 
    }
}

/* Logo容器 */
.logo-container {
    text-align: center;
    margin-bottom: 1.875rem; /* 30px */
    margin-bottom: 4vh;
    position: relative;
}

.main-logo {
    width: 7.5rem; /* 120px */
    width: clamp(5rem, 15vw, 7.5rem);
    height: 7.5rem;
    height: clamp(5rem, 15vw, 7.5rem);
    border-radius: 1.25rem; /* 20px */
    border-radius: clamp(0.9375rem, 3vw, 1.25rem);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0.625rem 1.875rem rgba(0, 0, 0, 0.2);
    animation: logoFloat 3s ease-in-out infinite;
    object-fit: cover;
    background: white;
    /* 使用站点根路径，避免相对路径在不同页面下失效 */
    background-image: url('/files/logo.PNG');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem; /* 48px */
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: bold;
    color: #667eea;
    text-shadow: 0.125rem 0.125rem 0.25rem rgba(0, 0, 0, 0.1);
    margin: 0 auto;
    transform: translateZ(0);
    will-change: transform;
}

.main-logo:hover {
    /* 去掉旋转，保留轻微缩放 */
    transform: scale(1.05) translateZ(0);
    box-shadow: 0 0.9375rem 2.5rem rgba(0, 0, 0, 0.3);
}

.main-logo.error {
    background-image: none;
    background: var(--primary-gradient);
    color: white;
}

@keyframes logoFloat {
    0%, 100% { 
        transform: translateY(0) translateZ(0); 
    }
    50% { 
        transform: translateY(-0.625rem) translateZ(0); /* -10px */
    }
}

/* 标题 - 彻底修复缩放 */
.main-title {
    font-size: 4rem; /* 64px */
    font-size: clamp(2.25rem, 8vw, 4rem);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 1.25rem; /* 20px */
    margin-bottom: 3vh;
    text-shadow: 0.1875rem 0.1875rem 0.375rem rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #fff, #00d2ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite alternate;
    letter-spacing: 0.0625rem; /* 1px */
    transform: translateZ(0);
    will-change: transform;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    line-height: 1.2;
}

@keyframes glow {
    from { 
        filter: drop-shadow(0 0 1.25rem rgba(0, 210, 255, 0.5)); 
    }
    to { 
        filter: drop-shadow(0 0 1.875rem rgba(0, 210, 255, 0.8)); 
    }
}

.subtitle {
    font-size: 1.5rem; /* 24px */
    font-size: clamp(1rem, 4vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 3.75rem; /* 60px */
    margin-bottom: 8vh;
    line-height: 1.6;
    max-width: 37.5rem; /* 600px */
    max-width: 80vw;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1.25rem; /* 20px */
    padding: 0 4vw;
}

/* 功能卡片容器 - 彻底修复缩放 */
.features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18.75rem, 1fr)); /* 300px */
    grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr)); /* 280px */
    gap: 2.5rem; /* 40px */
    gap: 3vw;
    justify-content: center;
    margin-bottom: 2.5rem; /* 40px */
    margin-bottom: 5vh;
    max-width: 75rem; /* 1200px */
    max-width: 90vw;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    padding: 0 1.25rem; /* 20px */
    padding: 0 4vw;
    transform: translateZ(0);
    width: 100%;
}

/* 功能卡片 - 彻底修复缩放 */
.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 1.25rem; /* 20px */
    border-radius: clamp(0.9375rem, 3vw, 1.25rem);
    padding: 2.5rem; /* 40px */
    padding: clamp(1.5625rem, 5vw, 2.5rem);
    height: 25rem; /* 400px */
    height: clamp(20rem, 50vh, 25rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    will-change: transform;
    min-width: 17.5rem; /* 280px */
    min-width: clamp(15.625rem, 60vw, 17.5rem);
    width: 100%;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg) translateZ(0);
    transition: all 0.5s;
    opacity: 0;
}

.feature-card:hover::before {
    animation: shine 0.5s ease;
}

@keyframes shine {
    0% { 
        transform: translateX(-100%) translateY(-100%) rotate(45deg) translateZ(0); 
        opacity: 0; 
    }
    50% { 
        opacity: 1; 
    }
    100% { 
        transform: translateX(100%) translateY(100%) rotate(45deg) translateZ(0); 
        opacity: 0; 
    }
}

.feature-card:hover {
    transform: translateY(-0.625rem) scale(1.05) translateZ(0); /* -10px */
    box-shadow: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    background: var(--card-hover);
}

.feature-icon {
    font-size: 5rem; /* 80px */
    font-size: clamp(3rem, 10vw, 5rem);
    margin-bottom: 1.25rem; /* 20px */
    margin-bottom: 3vh;
    animation: float 3s ease-in-out infinite;
    transform: translateZ(0);
}

.feature-card:nth-child(1) .feature-icon { animation-delay: 0s; }
.feature-card:nth-child(2) .feature-icon { animation-delay: 1.5s; }
.feature-card:nth-child(3) .feature-icon { animation-delay: 3s; }
.feature-card:nth-child(4) .feature-icon { animation-delay: 4.5s; }

@keyframes float {
    0%, 100% { 
        transform: translateY(0) translateZ(0); 
    }
    50% { 
        transform: translateY(-0.625rem) translateZ(0); /* -10px */
    }
}

.feature-title {
    font-size: 1.75rem; /* 28px */
    font-size: clamp(1.25rem, 5vw, 1.75rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.9375rem; /* 15px */
    margin-bottom: 2vh;
    letter-spacing: 0.03125rem; /* 0.5px */
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.3;
}

.feature-description {
    font-size: 1rem; /* 16px */
    font-size: clamp(0.875rem, 3vw, 1rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.25rem; /* 20px */
    margin-bottom: 3vh;
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.feature-button {
    padding: 0.75rem 1.875rem; /* 12px 30px */
    padding: clamp(0.625rem, 3vw, 0.75rem) clamp(1.25rem, 5vw, 1.875rem);
    background: linear-gradient(45deg, #00d2ff, #3a7bd5);
    border: none;
    border-radius: 1.5625rem; /* 25px */
    border-radius: clamp(1.25rem, 4vw, 1.5625rem);
    color: white;
    font-size: 1rem; /* 16px */
    font-size: clamp(0.875rem, 3vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0.25rem 0.9375rem rgba(0, 210, 255, 0.3);
    letter-spacing: 0.03125rem; /* 0.5px */
    position: relative;
    overflow: hidden;
    z-index: 1;
    transform: translateZ(0);
    will-change: transform;
    min-width: 7.5rem; /* 120px */
    min-height: 2.75rem; /* 44px */
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-button:hover {
    transform: scale(1.05) translateZ(0);
    box-shadow: 0 0.375rem 1.25rem rgba(0, 210, 255, 0.5);
}

.feature-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%) translateZ(0);
    transition: width 0.6s, height 0.6s;
    z-index: -1;
}

.feature-button:active::before {
    width: 18.75rem; /* 300px */
    height: 18.75rem;
}

/* 彩蛋模态框 - 修复缩放 */
.egg-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    /* 降低遮罩强度，保持背景可见；使用温和的模糊 */
    background: rgba(0, 0, 0, 0.35);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    transform: translateZ(0);
}

.egg-modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.egg-content {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    border-radius: 1.25rem; /* 20px */
    padding: 2.5rem; /* 40px */
    max-width: 90vw;
    max-width: 50rem; /* 800px */
    width: 90%;
    text-align: center;
    position: relative;
    transform: translateZ(0);
    /* 使用更明显的缩放弹出动画 */
    animation: eggModalPop 0.45s cubic-bezier(0.2, 0.8, 0.2, 1) both;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes eggModalPop {
    0% { transform: scale(0.8) translateY(10px); opacity: 0; }
    60% { transform: scale(1.03) translateY(0); opacity: 1; }
    100% { transform: scale(1) translateY(0); opacity: 1; }
}

/* 当弹出模态框时，禁止 body 滚动（作为备用，JS 也会设置 overflow） */
body.egg-open {
    overflow: hidden;
    touch-action: none;
}

/* 当彩蛋弹出时，对背景进行模糊处理，但保持可见 */
body.egg-open .geometric-bg,
body.egg-open .bg-animation,
body.egg-open .main-container,
body.egg-open .top-header {
    filter: blur(6px) saturate(0.95);
    transition: filter 0.28s ease;
    /* 禁用背景交互 */
    pointer-events: none;
}

@keyframes eggModalAppear {
    from {
        transform: scale(0.8) translateZ(0);
        opacity: 0;
    }
    to {
        transform: scale(1) translateZ(0);
        opacity: 1;
    }
}

.egg-close {
    position: absolute;
    top: 1.25rem; /* 20px */
    right: 1.25rem;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 2.5rem; /* 40px */
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.25rem; /* 20px */
}

.egg-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1) translateZ(0);
}

.egg-title {
    font-size: 3rem; /* 48px */
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: bold;
    color: white;
    margin-bottom: 1.25rem; /* 20px */
    text-shadow: 0.125rem 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

.egg-subtitle {
    font-size: 1.25rem; /* 20px */
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.875rem; /* 30px */
}

.egg-video-container {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0.9375rem; /* 15px */
    padding: 1.25rem; /* 20px */
    margin-bottom: 1.25rem;
    position: relative;
    overflow: hidden;
}

.egg-video {
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: 50vh;
    border-radius: 0.625rem; /* 10px */
    display: block;
}

.egg-stats {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.625rem; /* 10px */
    padding: 0.9375rem; /* 15px */
    color: white;
    font-size: 1rem; /* 16px */
    font-size: clamp(0.875rem, 2vw, 1rem);
}

.egg-stats p {
    margin: 0.3125rem 0; /* 5px */
}

.egg-stats span {
    color: #ffd700;
    font-weight: bold;
}

/* 页脚 */
footer {
    background: rgba(0, 0, 0, 0.2);
    color: white;
    text-align: center;
    padding: 1.875rem 1.25rem; /* 30px 20px */
    padding: clamp(1.25rem, 4vh, 1.875rem) clamp(0.625rem, 3vw, 1.25rem);
    margin-top: 3.75rem; /* 60px */
    margin-top: 8vh;
    position: relative;
    z-index: 1;
    width: 100vw;
}

.footer-content {
    max-width: 75rem; /* 1200px */
    max-width: 90vw;
    margin: 0 auto;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.25rem; /* 20px */
    gap: 3vw;
    margin-top: 1.25rem; /* 20px */
    margin-top: 3vh;
}

.social-link {
    width: 2.5rem; /* 40px */
    width: clamp(2rem, 6vw, 2.5rem);
    height: 2.5rem;
    height: clamp(2rem, 6vw, 2.5rem);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    transform: translateZ(0);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-0.1875rem) translateZ(0); /* -3px */
}

/* 快捷键提示 */
.shortcut-hint {
    position: fixed;
    bottom: 1.25rem; /* 20px */
    bottom: 3vh;
    right: 1.25rem;
    right: 3vw;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.9375rem 1.25rem; /* 15px 20px */
    padding: clamp(0.625rem, 3vh, 0.9375rem) clamp(0.9375rem, 3vw, 1.25rem);
    border-radius: 0.625rem; /* 10px */
    font-size: 0.875rem; /* 14px */
    font-size: clamp(0.75rem, 2vw, 0.875rem);
    opacity: 0.8;
    transition: opacity 0.3s;
    max-width: 18.75rem; /* 300px */
    max-width: 80vw;
    line-height: 1.4;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateZ(0);
}

.shortcut-hint:hover {
    opacity: 1;
}

/* 响应式设计 - 彻底修复 */
@media (max-width: 768px) {
    :root {
        --base-font-size: 16px;
    }
    
    html {
        font-size: 16px !important;
        -webkit-text-size-adjust: 100% !important;
    }
    
    .header-content {
        flex-direction: column;
        gap: 0.9375rem; /* 15px */
        gap: 2vh;
        padding: 0 0.9375rem; /* 15px */
        padding: 0 2.5vw;
    }
    
    .search-container {
        width: 100%;
        max-width: none;
        order: 2;
    }
    
    .header-nav {
        order: 1;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.625rem; /* 10px */
    }
    
    .main-container {
        padding-top: 8.75rem; /* 140px */
        padding-top: 20vh;
    }
    
    .features-container {
        grid-template-columns: 1fr;
        gap: 1.875rem; /* 30px */
        gap: 4vw;
        padding: 0 0.9375rem; /* 15px */
        padding: 0 2.5vw;
    }
    
    .feature-card {
        height: 21.875rem; /* 350px */
        height: clamp(18.75rem, 45vh, 21.875rem);
        padding: 1.875rem; /* 30px */
        padding: clamp(1.25rem, 4vw, 1.875rem);
    }
    
    .shortcut-hint {
        display: none;
    }
    
    .egg-content {
        padding: 1.875rem; /* 30px */
        padding: clamp(1.25rem, 5vw, 1.875rem);
        max-height: 80vh;
    }
    
    .egg-title {
        font-size: 2.25rem; /* 36px */
        font-size: clamp(1.75rem, 8vw, 2.25rem);
    }
    
    .egg-subtitle {
        font-size: 1.125rem; /* 18px */
        font-size: clamp(1rem, 4vw, 1.125rem);
    }
    
    .egg-video {
        max-height: 40vh;
    }
}

@media (max-width: 480px) {
    :root {
        --base-font-size: 16px;
    }
    
    html {
        font-size: 16px !important;
        -webkit-text-size-adjust: 100% !important;
    }
    
    .main-title {
        font-size: 2.25rem; /* 36px */
        font-size: clamp(1.75rem, 10vw, 2.25rem);
    }
    
    .subtitle {
        font-size: 1.125rem; /* 18px */
        font-size: clamp(1rem, 4vw, 1.125rem);
    }
    
    .feature-card {
        height: 20rem; /* 320px */
        height: clamp(17.5rem, 40vh, 20rem);
        padding: 1.5625rem; /* 25px */
        padding: clamp(1.25rem, 4vw, 1.5625rem);
    }
    
    .feature-title {
        font-size: 1.5rem; /* 24px */
        font-size: clamp(1.125rem, 5vw, 1.5rem);
    }
    
    .feature-description {
        font-size: 0.875rem; /* 14px */
        font-size: clamp(0.75rem, 3vw, 0.875rem);
    }
    
    .feature-button {
        font-size: 0.875rem; /* 14px */
        font-size: clamp(0.75rem, 3vw, 0.875rem);
        padding: 0.5rem 1rem; /* 8px 16px */
        padding: clamp(0.5rem, 2vw, 0.5rem) clamp(1rem, 4vw, 1rem);
    }
    
    .top-header {
        padding: 0.625rem 0; /* 10px */
        padding: clamp(0.5rem, 2vh, 0.625rem) 0;
    }
    
    .nav-link {
        font-size: 0.75rem; /* 12px */
        font-size: clamp(0.625rem, 3vw, 0.75rem);
        padding: 0.375rem 0.75rem; /* 6px 12px */
        padding: clamp(0.25rem, 2vw, 0.375rem) clamp(0.5rem, 3vw, 0.75rem);
    }
    
    .search-input {
        font-size: 16px !important;
    }
    
    .egg-content {
        padding: 1.25rem; /* 20px */
        padding: clamp(0.9375rem, 4vw, 1.25rem);
    }
}

/* 超小屏幕适配 */
@media (max-width: 320px) {
    :root {
        --base-font-size: 16px;
    }
    
    html {
        font-size: 16px !important;
        -webkit-text-size-adjust: 100% !important;
    }
    
    .main-container {
        padding-top: 7.5rem; /* 120px */
        padding-top: 35vh;
    }
    
    .features-container {
        padding: 0 0.9375rem; /* 15px */
        padding: 0 4vw;
    }
    
    .feature-card {
        min-width: 15rem; /* 240px */
        min-width: clamp(12.5rem, 70vw, 15rem);
    }
    
    .egg-content {
        padding: 1.25rem; /* 20px */
        padding: clamp(0.9375rem, 4vw, 1.25rem);
    }
}

/* 横屏适配 */
@media (orientation: landscape) and (max-height: 600px) {
    .main-container {
        padding-top: 5rem; /* 80px */
        padding-top: 15vh;
        justify-content: flex-start;
        padding-bottom: 1.25rem; /* 20px */
    }
    
    .feature-card {
        height: 17.5rem; /* 280px */
        height: clamp(15rem, 60vh, 17.5rem);
    }
    
    .main-title {
        font-size: 3rem; /* 48px */
        font-size: clamp(2rem, 6vw, 3rem);
    }
    
    .subtitle {
        margin-bottom: 1.875rem; /* 30px */
        margin-bottom: 4vh;
    }
    
    .egg-content {
        max-height: 80vh;
        overflow-y: auto;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .main-logo {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* 打印样式 */
@media print {
    body {
        background: white !important;
    }
    
    .bg-animation,
    .geometric-bg,
    .top-header,
    .shortcut-hint,
    .egg-modal {
        display: none !important;
    }
    
    .main-container {
        padding-top: 0 !important;
    }
}

/* 缩放控制：不要强制禁止缩放，允许用户根据需要缩放以提高可访问性 */
@media screen and (max-width: 768px) {
    body {
        -ms-touch-action: pan-y;
        touch-action: pan-y;
        /* 不强制缩放；只清除已知的 transform 缩放样式 */
        -webkit-transform: none !important;
        transform: none !important;
    }
}

/* 防止iOS缩放 */
@supports (-webkit-touch-callout: none) {
    body {
        -webkit-text-size-adjust: 100% !important;
        -webkit-transform: scale(1) !important;
        transform: scale(1) !important;
    }
}

/* Android专用 */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    body {
        text-size-adjust: 100% !important;
    }
}

/* 强制防止所有缩放 */
* {
    max-width: 100% !important;
    box-sizing: border-box !important;
}

img, video, canvas {
    max-width: 100% !important;
    height: auto !important;
}

/* 动画关键帧 */
@keyframes move {
    0% { 
        transform: translateY(0) rotate(0deg); 
        opacity: 1; 
        border-radius: 0; 
    }
    100% { 
        transform: translateY(-100vh) rotate(720deg); 
        opacity: 0; 
        border-radius: 50%; 
    }
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0) rotate(0deg); 
    }
    33% { 
        transform: translateY(-1.25rem) rotate(120deg); /* -20px */
    }
    66% { 
        transform: translateY(0.625rem) rotate(240deg); /* 10px */
    }
}


.feature-card.talk {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1), rgba(255, 152, 0, 0.1));
    border: 2px solid rgba(255, 193, 7, 0.2);
}

.feature-card.talk:hover {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.15), rgba(255, 152, 0, 0.15));
    border-color: rgba(255, 193, 7, 0.4);
    box-shadow: 0 20px 40px rgba(255, 193, 7, 0.2);
}

.feature-card.talk .feature-button {
    background: linear-gradient(45deg, #ffc107, #ff9800);
    box-shadow: 0 4px 15px rgba(255, 193, 7, 0.3);
}

.feature-card.talk .feature-button:hover {
    box-shadow: 0 6px 20px rgba(255, 193, 7, 0.5);
}

.feature-card.chat {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(0, 150, 136, 0.1));
    border: 2px solid rgba(76, 175, 80, 0.2);
}

.feature-card.chat:hover {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.15), rgba(0, 150, 136, 0.15));
    border-color: rgba(76, 175, 80, 0.4);
    box-shadow: 0 20px 40px rgba(76, 175, 80, 0.2);
}

.feature-card.chat .feature-button {
    background: linear-gradient(45deg, #4caf50, #009688);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.feature-card.chat .feature-button:hover {
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
}

/* 外部链接特殊样式 */
.feature-card.external .feature-button {
    background: linear-gradient(45deg, #9c27b0, #673ab7);
    box-shadow: 0 4px 15px rgba(156, 39, 176, 0.3);
}

.feature-card.external .feature-button:hover {
    box-shadow: 0 6px 20px rgba(156, 39, 176, 0.5);
}

/* 外部链接图标 */
.external-link-icon {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.875em;
    opacity: 0.8;
}

/* 更新功能卡片容器为6列 */
.features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    gap: 3vw;
    justify-content: center;
    margin-bottom: 40px;
    margin-bottom: 5vh;
    max-width: 1200px;
    max-width: 90vw;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    padding: 0 20px;
    padding: 0 4vw;
}

/* 新功能动画 */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px) translateZ(0);
    }
    to {
        opacity: 1;
        transform: translateX(0) translateZ(0);
    }
}

.feature-card:nth-child(5),
.feature-card:nth-child(6) {
    animation: slideInRight 0.8s ease-out;
    animation-fill-mode: both;
}

.feature-card:nth-child(5) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(6) {
    animation-delay: 0.4s;
}