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


.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(88, 195, 0, 0.7) 0%, 
        rgba(66, 133, 244, 0.3) 25%, 
        rgba(52, 168, 83, 0.2) 50%, 
        rgba(251, 188, 5, 0.1) 75%, 
        rgba(234, 67, 53, 0.2) 100%);
    z-index: 1;
}


body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, 
        #6fff0089 0%, 
        #1a1a2e 25%, 
        #16213e 50%, 
        #0f3460 75%, 
        #533483 100%);
    color: #fff;
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

/* 动态背景效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(66, 133, 244, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(52, 168, 83, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(251, 188, 5, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 90% 90%, rgba(234, 67, 53, 0.1) 0%, transparent 50%);
    z-index: -2;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    25% {
        transform: scale(1.1) rotate(1deg);
    }
    50% {
        transform: scale(1.05) rotate(-1deg);
    }
    75% {
        transform: scale(1.15) rotate(0.5deg);
    }
}


.particles-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(66, 133, 244, 0.6);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.particle:nth-child(2n) {
    background: rgba(52, 168, 83, 0.6);
    animation-duration: 8s;
}

.particle:nth-child(3n) {
    background: rgba(251, 188, 5, 0.6);
    animation-duration: 10s;
}

.particle:nth-child(4n) {
    background: rgba(234, 67, 53, 0.6);
    animation-duration: 12s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) translateX(0px);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    50% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.8;
    }
}


.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, 
        rgba(52, 168, 83, 0.6) 0%, 
        rgba(26, 26, 46, 0.85) 50%, 
        rgba(15, 52, 96, 0.9) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(66, 133, 244, 0.3);
    z-index: 1000;
    transition: all 0.4s ease;
    box-shadow: 0 4px 30px rgba(52, 168, 83, 0.6);
}

.fixed-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(66, 133, 244, 0.1) 50%, 
        transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fixed-header:hover::before {
    opacity: 1;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
    height: 80px;
    position: relative;
    z-index: 2;
}

.logo {
    display: flex;
    align-items: center;
    margin-right: auto;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, transparent, rgba(66, 133, 244, 0.5), transparent);
}

.logo img {
    height: 45px;
    transition: all 0.4s ease;
    filter: drop-shadow(0 0 10px rgba(66, 133, 244, 0.3));
}

.logo:hover img {
    transform: scale(1.1) rotate(2deg);
    filter: drop-shadow(0 0 15px rgba(66, 133, 244, 0.6));
}

/* 导航菜单 */
    .top-navigation {
        display: flex;
        align-items: center;
        gap: 40px;
        position: relative;
    }

.nav-list {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-item {
    position: relative;
}

.nav-item a {
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    padding: 12px 20px;
    border-radius: 25px;
    transition: all 0.4s ease;
    position: relative;
    background: rgba(52, 168, 83, 0.6);
    border: 1px solid transparent;
}

.nav-item a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(52, 168, 83, 0.1));
    border-radius: 25px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-item a:hover {
    color: #4285F4;
    background: rgba(66, 133, 244, 0.15);
    border-color: rgba(66, 133, 244, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(66, 133, 244, 0.2);
}

.nav-item a:hover::before {
    opacity: 1;
}

.nav-item.active a {
    color: #4285F4;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.2), rgba(52, 168, 83, 0.1));
    border-color: rgba(66, 133, 244, 0.5);
    box-shadow: 0 8px 25px rgba(66, 133, 244, 0.3);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: linear-gradient(90deg, #4285F4, #34A853);
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(66, 133, 244, 0.5);
}

/* 导航右侧按钮 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-btn {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(66, 133, 244, 0.1));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.4s ease;
    text-decoration: none;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(66, 133, 244, 0.2));
    transform: scale(1.15) rotate(5deg);
    border-color: #4285F4;
    box-shadow: 0 8px 25px rgba(66, 133, 244, 0.3);
}

.nav-btn .btn-icon {
    font-size: 20px;
    transition: all 0.3s ease;
}

.nav-btn:hover .btn-icon {
    transform: scale(1.1);
}

.music-btn.active {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.3), rgba(52, 168, 83, 0.2));
    border-color: #4285F4;
    animation: pulse 2s infinite;
    box-shadow: 0 0 20px rgba(66, 133, 244, 0.4);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.7);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(66, 133, 244, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0);
    }
}

/* 主内容区域 */
.main-content {
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.1) 0%, 
        rgba(26, 26, 46, 0.05) 25%, 
        rgba(22, 33, 62, 0.02) 50%, 
        rgba(15, 52, 96, 0.05) 75%, 
        rgba(83, 52, 131, 0.1) 100%);
}

.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 5% 5%, rgba(66, 133, 244, 0.08) 0%, transparent 30%),
        radial-gradient(circle at 95% 15%, rgba(52, 168, 83, 0.05) 0%, transparent 30%),
        radial-gradient(circle at 15% 85%, rgba(251, 188, 5, 0.04) 0%, transparent 30%),
        radial-gradient(circle at 85% 85%, rgba(234, 67, 53, 0.05) 0%, transparent 30%);
    pointer-events: none;
    z-index: 1;
}

/* 页面section */
.page-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 50px;
    position: relative;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.3) 0%, 
        rgba(26, 26, 46, 0.2) 25%, 
        rgba(22, 33, 62, 0.1) 50%, 
        rgba(15, 52, 96, 0.2) 75%, 
        rgba(83, 52, 131, 0.3) 100%);
}

.page-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 10%, rgba(66, 133, 244, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 20%, rgba(52, 168, 83, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(251, 188, 5, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(234, 67, 53, 0.1) 0%, transparent 40%);
    pointer-events: none;
    z-index: 1;
}

.page-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(66, 133, 244, 0.05) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(52, 168, 83, 0.05) 50%, transparent 70%);
    pointer-events: none;
    z-index: 1;
    animation: subtleShift 20s ease-in-out infinite;
}

@keyframes subtleShift {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1) rotate(0deg);
    }
    25% {
        opacity: 0.5;
        transform: scale(1.02) rotate(1deg);
    }
    50% {
        opacity: 0.4;
        transform: scale(1.01) rotate(-0.5deg);
    }
    75% {
        opacity: 0.6;
        transform: scale(1.03) rotate(0.5deg);
    }
}

.page-section.active {
    opacity: 1;
    transform: translateY(0);
}

/* 英雄区域 */
.hero-section {
    text-align: center;
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.4) 0%, 
        rgba(66, 133, 244, 0.2) 50%, 
        rgba(52, 168, 83, 0.1) 100%);
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(66, 133, 244, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(52, 168, 83, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(251, 188, 5, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #4285F4, #34A853);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(66, 133, 244, 0.5);
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 20px;
    color: #ccc;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #ccc;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #4285F4, #34A853);
    color: #fff;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border-color: #4285F4;
}

.btn-secondary:hover {
    background: rgba(66, 133, 244, 0.1);
    transform: translateY(-2px);
}

.btn-download {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 20px 30px;
    gap: 15px;
}

.btn-download:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 24px;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-title {
    font-size: 18px;
    font-weight: 600;
}

.btn-subtitle {
    font-size: 12px;
    opacity: 0.8;
}

/* 内容区域 */
.section-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 50px;
    background: linear-gradient(135deg, #4285F4, #34A853);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 2;
}

/* 特色卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(66, 133, 244, 0.05) 50%, 
        rgba(255, 255, 255, 0.1) 100%);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-15px) scale(1.02);
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.15) 0%, 
        rgba(66, 133, 244, 0.1) 50%, 
        rgba(255, 255, 255, 0.15) 100%);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(66, 133, 244, 0.2);
    border-color: rgba(66, 133, 244, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #4285F4;
}

.feature-card p {
    color: #ccc;
    line-height: 1.6;
}

/* 角色卡片网格 */
.characters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
    position: relative;
    z-index: 2;
}

.character-card {
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(52, 168, 83, 0.05) 50%, 
        rgba(255, 255, 255, 0.1) 100%);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.character-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.character-card:hover::before {
    left: 100%;
}

.character-card:hover {
    transform: translateY(-15px) scale(1.02);
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.15) 0%, 
        rgba(52, 168, 83, 0.1) 50%, 
        rgba(255, 255, 255, 0.15) 100%);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(52, 168, 83, 0.2);
    border-color: rgba(52, 168, 83, 0.3);
}

.character-image {
    margin-bottom: 20px;
}

.character-image img {
    width: 100%;
    max-width: 200px;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.character-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #4285F4;
}

.character-card p {
    color: #ccc;
    line-height: 1.6;
}

/* 下载区域 */
.download-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #ccc;
    position: relative;
    z-index: 2;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

/* 底部栏 */
.footer {
    background: linear-gradient(135deg, 
        rgba(15, 51, 96, 0) 0%, 
        rgba(41, 133, 246, 0.481) 50%, 
        rgb(101, 162, 235) 100%);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(66, 133, 244, 0.3);
    padding: 40px 0;
    text-align: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
    position: relative;
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.3);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(66, 133, 244, 0.05) 50%, 
        transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.footer:hover::before {
    opacity: 1;
}

.footer.show {
    opacity: 1;
    transform: translateY(0);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
    position: relative;
    z-index: 2;
}

.footer-content::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #4285F4, #34A853, #FBBC05, #EA4335);
    border-radius: 2px;
    box-shadow: 0 0 15px rgba(66, 133, 244, 0.5);
}

.footer-content p {
    margin: 8px 0;
    color: #ccc;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.footer-content p:first-child {
    color: #4285F4;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    text-shadow: 0 0 10px rgba(66, 133, 244, 0.3);
}

.footer-content p:hover {
    color: #4285F4;
    transform: translateY(-1px);
    text-shadow: 0 0 8px rgba(66, 133, 244, 0.4);
}

/* 添加底部装饰元素 */
.footer::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        #4285F4 25%, 
        #34A853 50%, 
        #FBBC05 75%, 
        #EA4335 100%);
    opacity: 0.6;
}

/* 页面切换动画 - 流畅自然的滑动效果 */
.page-fade-out {
    animation: pageSlideOut 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    pointer-events: none;
}

.page-fade-in {
    animation: pageSlideIn 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes pageSlideOut {
    0% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateX(-80px) scale(0.98);
    }
}

@keyframes pageSlideIn {
    0% {
        opacity: 0;
        transform: translateX(80px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* 向下滑动动画 - 更流畅的垂直滑动 */
.page-slide-down-out {
    animation: pageSlideDownOut 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    pointer-events: none;
}

.page-slide-down-in {
    animation: pageSlideDownIn 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes pageSlideDownOut {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-60px) scale(0.98);
    }
}

@keyframes pageSlideDownIn {
    0% {
        opacity: 0;
        transform: translateY(60px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Toast提示动画 */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* 中等屏幕响应式设计 */
@media (max-width: 1024px) {
    .header-container {
        padding: 0 20px;
        height: 75px;
    }
    
    .nav-list {
        gap: 25px;
    }
    
    .nav-item a {
        font-size: 15px;
        padding: 11px 18px;
    }
    
    .nav-actions {
        gap: 18px;
    }
    
    .nav-btn {
        width: 42px;
        height: 42px;
    }
}

/* 小屏幕响应式设计 */
@media (max-width: 900px) {
    .header-container {
        padding: 0 18px;
        height: 72px;
    }
    
    .nav-list {
        gap: 22px;
    }
    
    .nav-item a {
        font-size: 14px;
        padding: 10px 16px;
    }
    
    .nav-actions {
        gap: 16px;
    }
    
    .nav-btn {
        width: 40px;
        height: 40px;
    }
}

/* 小屏幕响应式设计 */
@media (max-width: 768px) {
    .header-container {
        padding: 0 15px;
        height: 70px;
    }
    
    .logo img {
        height: 35px;
    }
    
    .logo::after {
        right: -15px;
        height: 30px;
    }
    
    .nav-list {
        gap: 20px;
    }
    
    .nav-item a {
        font-size: 14px;
        padding: 10px 15px;
        border-radius: 20px;
    }
    
    .nav-actions {
        gap: 15px;
    }
    
    .nav-btn {
        width: 38px;
        height: 38px;
        background: rgba(255, 255, 255, 0.25);
        border: 1px solid rgba(255, 255, 255, 0.4);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        flex-shrink: 0; /* 防止按钮被压缩 */
    }
    
    .nav-btn .btn-icon {
        font-size: 18px;
    }
    
    .nav-btn:hover {
        background: rgba(255, 255, 255, 0.35);
        transform: scale(1.05);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .characters-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .footer {
        padding: 30px 0;
    }
    
    .footer-content {
        padding: 0 15px;
    }
    
    .footer-content::before {
        width: 40px;
        top: -15px;
    }
    
    .loading-screen img {
        width: 100px;
    }
    
    .progress-bar {
        width: 280px;
        height: 5px;
    }
    
    .loading-text {
        font-size: 24px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(52, 168, 83, 0.6);
}

::-webkit-scrollbar-thumb {
    background: #4285F4;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3367D6;
}

/* 确保首页默认显示 */
#home,
#home.page-section,
.page-section.active {
    opacity: 1 !important;
    transform: translateY(0) !important;
    visibility: visible !important;
}

/* 加载动画样式 */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        #0c0c0c 0%, 
        #1a1a2e 25%, 
        #16213e 50%, 
        #0f3460 75%, 
        #533483 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9998;
    transition: opacity 0.8s ease;
}

.loading-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(66, 133, 244, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(52, 168, 83, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(251, 188, 5, 0.15) 0%, transparent 50%);
    animation: backgroundShift 15s ease-in-out infinite;
}

.loading-screen img {
    width: 120px;
    height: auto;
    margin-bottom: 40px;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 20px rgba(66, 133, 244, 0.5));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.progress-bar {
    width: 350px;
    height: 6px;
    background: rgba(52, 168, 83, 0.6);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 30px;
    position: relative;
    z-index: 2;
    box-shadow: 0 0 20px rgba(66, 133, 244, 0.3);
}

.progress {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #4285F4, #34A853, #FBBC05, #EA4335);
    border-radius: 3px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.loading-text {
    display: flex;
    gap: 3px;
    font-size: 28px;
    font-weight: bold;
    color: #4285F4;
    position: relative;
    z-index: 2;
    text-shadow: 0 0 10px rgba(66, 133, 244, 0.5);
}

.loading-text span {
    animation: loadingBounce 1.4s ease-in-out infinite both;
    animation-delay: calc(var(--i) * 0.1s);
    background: linear-gradient(135deg, #4285F4, #34A853);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes loadingBounce {
    0%, 80%, 100% {
        transform: scale(0) rotate(0deg);
        opacity: 0.5;
    }
    40% {
        transform: scale(1.2) rotate(10deg);
        opacity: 1;
    }
}

/* 移动端汉堡菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 100%;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 性能优化 - 减少动画复杂度 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
        order: -1; /* 让汉堡菜单按钮在最左侧 */
        margin-right: auto; /* 推送到最左侧 */
    }
    
    .top-navigation {
        justify-content: space-between;
        width: 100%;
    }
    
    .nav-list {
        position: absolute;
        top: 100%;
        right: 0;
        width: 250px;
        background: linear-gradient(135deg, 
            rgba(52, 168, 83, 0.95) 0%, 
            rgba(26, 26, 46, 0.95) 50%, 
            rgba(15, 52, 96, 0.95) 100%);
        backdrop-filter: blur(20px);
        border-radius: 0 0 15px 15px;
        box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch; /* 改为stretch让子元素填满宽度 */
        padding: 20px 0;
        margin: 0;
        list-style: none;
        overflow: hidden;
    }
    
    .nav-list.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        margin: 10px 0;
        width: 100%;
        text-align: center;
        display: flex;
        justify-content: center; /* 水平居中 */
        align-items: center; /* 垂直居中 */
    }
    
    .nav-item a {
        font-size: 16px;
        padding: 12px 20px;
        display: block;
        width: calc(100% - 30px); /* 减去左右边距 */
        box-sizing: border-box;
        text-decoration: none;
        color: #fff;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        margin: 0 15px;
        transition: all 0.3s ease;
        text-align: center; /* 确保文字居中 */
    }
    
    .nav-item a:hover {
        background: rgba(255, 255, 255, 0.2);
        transform: translateY(-2px);
    }
    
    .nav-actions {
        position: fixed;
        bottom: -100px;
        right: 20px;
        flex-direction: column;
        gap: 12px;
        z-index: 999999; /* 最高层级，确保在最上层 */
        display: flex !important; /* 强制显示 */
        background: rgba(0, 0, 0, 0.6); /* 更明显的背景 */
        padding: 15px; /* 增加内边距 */
        border-radius: 25px; /* 更大的圆角 */
        backdrop-filter: blur(20px);
        border: 2px solid rgba(255, 255, 255, 0.3); /* 更明显的边框 */
        min-height: 150px; /* 增加高度确保3个按钮都能显示 */
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5); /* 更明显的阴影 */
        pointer-events: auto; /* 确保可以点击 */
        isolation: isolate;
        /* 确保按钮容器不被其他元素遮挡 */
        transform: none !important; /* 防止被其他CSS影响 */
        opacity: 1 !important; /* 强制显示 */
        visibility: visible !important; /* 强制可见 */
    }
    
    /* 移动端按钮样式 - 确保所有按钮都能显示 */
    .nav-btn {
        width: 42px !important; /* 强制宽度 */
        height: 42px !important; /* 强制高度 */
        background: rgba(255, 255, 255, 0.4) !important; /* 更明显的背景 */
        border: 2px solid rgba(255, 255, 255, 0.6) !important; /* 更明显的边框 */
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4) !important; /* 更明显的阴影 */
        flex-shrink: 0;
        display: flex !important; /* 强制显示 */
        opacity: 1 !important; /* 强制可见 */
        visibility: visible !important; /* 强制可见 */
        transform: none !important; /* 防止被其他CSS影响 */
        position: relative !important; /* 确保定位正确 */
        z-index: 999999 !important; /* 最高层级 */
        margin: 0 !important; /* 清除边距 */
        padding: 0 !important; /* 清除内边距 */
    }
    
    .nav-btn .btn-icon {
        font-size: 20px !important; /* 强制图标大小 */
        color: #fff !important; /* 强制图标颜色 */
        display: block !important; /* 强制显示 */
        opacity: 1 !important; /* 强制可见 */
    }
    
    .nav-btn:hover {
        background: rgba(255, 255, 255, 0.6) !important; /* 悬停效果 */
        transform: scale(1.1) !important; /* 悬停缩放 */
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6) !important; /* 悬停阴影 */
    }
    
    .header-container {
        padding: 0 15px;
        height: 70px;
    }
    
    .logo img {
        height: 35px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .web-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .footer {
        padding: 30px 0;
    }
    
    .footer-content {
        padding: 0 15px;
    }
    
    .loading-screen img {
        width: 100px;
    }
    
    .progress-bar {
        width: 280px;
        height: 5px;
    }
    
    .loading-text {
        font-size: 24px;
    }
    
    /* 移动端减少粒子数量 */
    .particle {
        display: none;
    }
    
    /* 移动端简化背景动画 */
    body::before {
        animation: none;
    }
    
    /* 移动端减少模糊效果 */
    .fixed-header {
        backdrop-filter: blur(10px);
    }
}

/* 超小屏幕优化 */
@media (max-width: 480px) {
    .header-container {
        padding: 0 10px;
        height: 60px;
    }
    
    .logo img {
        height: 30px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .nav-list {
        width: 200px;
    }
    
    .nav-actions {
        bottom: -75px;
        right: 15px;
        padding: 10px;
        gap: 10px;
    }
    
    .nav-btn {
        width: 35px;
        height: 35px;
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    .nav-btn .btn-icon {
        font-size: 16px;
    }
    
    .nav-btn:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: scale(1.1);
    }
}