/* Intro Animation */
.intro-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: introFadeOut 2.5s ease-in-out forwards;
}

.intro-text {
    font-size: 8.5rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

.loading-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.loading-bar span {
    font-size: 2rem;
    opacity: 0;
    transform: scale(0.5);
    filter: blur(2px);
    animation: emojiLoad 0.3s ease-out forwards;
}

.loading-bar span:nth-child(1) { animation-delay: 0.1s; }
.loading-bar span:nth-child(2) { animation-delay: 0.2s; }
.loading-bar span:nth-child(3) { animation-delay: 0.3s; }
.loading-bar span:nth-child(4) { animation-delay: 0.4s; }
.loading-bar span:nth-child(5) { animation-delay: 0.5s; }
.loading-bar span:nth-child(6) { animation-delay: 0.6s; }
.loading-bar span:nth-child(7) { animation-delay: 0.7s; }
.loading-bar span:nth-child(8) { animation-delay: 0.8s; }

@keyframes emojiLoad {
    0% {
        opacity: 0;
        transform: scale(0.5) translateY(10px);
        filter: blur(2px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0);
    }
}

/* 添加消失动画 */
.loading-bar span {
    animation:
        emojiLoad 0.3s ease-out forwards,
        emojiUnload 0.3s ease-in forwards;
}

.loading-bar span:nth-child(1) { animation-delay: 0.1s, 1.6s; }
.loading-bar span:nth-child(2) { animation-delay: 0.2s, 1.7s; }
.loading-bar span:nth-child(3) { animation-delay: 0.3s, 1.8s; }
.loading-bar span:nth-child(4) { animation-delay: 0.4s, 1.9s; }
.loading-bar span:nth-child(5) { animation-delay: 0.5s, 2.0s; }
.loading-bar span:nth-child(6) { animation-delay: 0.6s, 2.1s; }
.loading-bar span:nth-child(7) { animation-delay: 0.7s, 2.2s; }
.loading-bar span:nth-child(8) { animation-delay: 0.8s, 2.3s; }

@keyframes emojiUnload {
    0% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0);
    }
    100% {
        opacity: 0;
        transform: scale(0.8) translateY(-10px);
        filter: blur(2px);
    }
}

.intro-text span {
    background: linear-gradient(135deg, #333, #666);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    transform: translateY(20px) scale(0.5);
    display: inline-block;
}

.intro-text span:nth-child(1) { animation: letterIn 0.4s ease-out 0.1s forwards, letterOut 0.4s ease-in 1.6s forwards; }
.intro-text span:nth-child(2) { animation: letterIn 0.4s ease-out 0.2s forwards, letterOut 0.4s ease-in 1.7s forwards; }
.intro-text span:nth-child(3) { animation: letterIn 0.4s ease-out 0.3s forwards, letterOut 0.4s ease-in 1.8s forwards; }
.intro-text span:nth-child(4) { animation: letterIn 0.4s ease-out 0.4s forwards, letterOut 0.4s ease-in 1.9s forwards; }
.intro-text span:nth-child(5) { animation: letterIn 0.4s ease-out 0.5s forwards, letterOut 0.4s ease-in 2.0s forwards; }
.intro-text span:nth-child(6) { animation: letterIn 0.4s ease-out 0.6s forwards, letterOut 0.4s ease-in 2.1s forwards; }
.intro-text span:nth-child(7) { animation: letterIn 0.4s ease-out 0.7s forwards, letterOut 0.4s ease-in 2.2s forwards; }
.intro-text span:nth-child(8) { animation: letterIn 0.4s ease-out 0.8s forwards, letterOut 0.4s ease-in 2.2s forwards; }
.intro-text span:nth-child(9) { animation: letterIn 0.4s ease-out 0.9s forwards, letterOut 0.4s ease-in 2.2s forwards; }
.intro-text span:nth-child(10) { animation: letterIn 0.4s ease-out 1.0s forwards, letterOut 0.4s ease-in 2.2s forwards; }
.intro-text span:nth-child(11) { animation: letterIn 0.4s ease-out 1.1s forwards, letterOut 0.4s ease-in 2.2s forwards; }
.intro-text span:nth-child(12) { animation: letterIn 0.4s ease-out 1.2s forwards, letterOut 0.4s ease-in 2.2s forwards; }

@keyframes letterIn {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.5);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes letterOut {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-20px) scale(0.8);
    }
}

@keyframes introFadeOut {
    0%, 70% {
        opacity: 1;
        visibility: visible;
    }
    100% {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0.65));
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    padding: 2rem 0;
}

.nav {
    margin-bottom: 2rem;
}

.nav-link {
    display: inline-block;
    color: #171717;
    text-decoration: none;
    padding: 10px 20px;
    border: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.2));
}

.nav-link:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.3));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.title {
    font-size: 3rem;
    color: #333;
    text-align: center;
    margin-bottom: 3rem;
}

.main {
    padding: 2rem 0;
}

.friend-card {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

.friend-card::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: 0.5s;
}

.friend-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.6);
}

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

.friend-info {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.friend-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.friend-details {
    flex: 1;
}

.friend-name {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 0.5rem;
}

.friend-description {
    font-size: 1rem;
    color: #666;
}

.friend-action {
    padding: 10px 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.2));
    color: #333;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.friend-card:hover .friend-action {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.3));
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.friend-card:hover .friend-name {
    color: #000;
}

.friend-card:hover .friend-description {
    color: #444;
}

.friend-card:hover .friend-avatar {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Hide main content initially */
body > *:not(.intro-animation) {
    opacity: 0;
    animation: mainContentFade 1s ease-out 2.5s forwards;
}

@keyframes mainContentFade {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}