@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');
:root {
    --bg-dark: #0a1929;
    --primary: #00c6ff;
    --secondary: #0072ff;
    --accent: #ff2d75;
    --success: #00d27a;
    --card-bg: rgba(25, 45, 70, 0.6);
    --text-light: #e0f7ff;
    --text-muted: #8da1b9;
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    --shadow: 0 8px 32px rgba(0, 114, 255, 0.2);
}
* {
  margin: 0;
  padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
body {
    font-family: 'Montserrat', 'Noto Sans SC', sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #0c1b2e 100%);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    background-attachment: fixed;
    background-size: cover;
    position: relative;
}
body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 10% 20%, rgba(0, 198, 255, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 45, 117, 0.05) 0%, transparent 20%);
    z-index: -1;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(10, 25, 41, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}
.logo-icon {
    font-size: 2rem;
    color: var(--primary);
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary), var(--text-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links {
    display: flex;
    gap: 30px;
}
.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 10px 0;
}
.nav-link:hover, .nav-link.active {
    color: var(--text-light);
}
.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}
.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}
.hero {
  text-align: center;
    padding: 80px 20px 60px;
    max-width: 900px;
    margin: 0 auto;
}
.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}
.hero p {
    font-size: 1.4rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
.year-badge {
    display: inline-block;
    background: rgba(0, 198, 255, 0.15);
    color: var(--primary);
    padding: 8px 25px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    border: 1px solid rgba(0, 198, 255, 0.3);
    margin-bottom: 40px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}
.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin: 50px 0;
}
.card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    -webkit-transition: var(--transition);
    -moz-transition: var(--transition);
    -ms-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
}
.card:hover {
    -webkit-transform: translateY(-10px);
    -moz-transform: translateY(-10px);
    -ms-transform: translateY(-10px);
    -o-transform: translateY(-10px);
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 114, 255, 0.3);
    border-color: rgba(0, 198, 255, 0.3);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
    position: relative;
    -webkit-animation: fadeIn 0.3s ease;
    -moz-animation: fadeIn 0.3s ease;
    -o-animation: fadeIn 0.3s ease;
    animation: fadeIn 0.3s ease;
}
.card-title {
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(45deg, var(--primary), var(--text-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.card-icon {
    font-size: 2.2rem;
    color: var(--primary);
}
/* 聊天室样式 */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 400px;
}
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    background: rgba(10, 25, 41, 0.3);
    border-radius: 15px;
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.message {
    max-width: 80%;
    padding: 12px 18px;
    border-radius: 18px;
    font-size: 1rem;
    position: relative;
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.sent {
    background: rgba(255, 45, 117, 0.2);
    border: 1px solid rgba(255, 45, 117, 0.3);
    align-self: flex-end;
}
.message-sender {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--primary);
}
.chat-input {
    display: flex;
    gap: 10px;
}
.chat-input input {
    flex: 1;
    padding: 14px 20px;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    background: rgba(10, 25, 41, 0.4);
    color: var(--text-light);
    font-size: 1rem;
    outline: none;
    -webkit-transition: var(--transition);
    -moz-transition: var(--transition);
    -ms-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}
.chat-input input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 198, 255, 0.2);
}
.chat-input button {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    -webkit-transition: var(--transition);
    -moz-transition: var(--transition);
    -ms-transition: var(--transition);
    -o-transition: var(--transition);
    transition: var(--transition);
}
.chat-input button:hover {
    box-shadow: 0 5px 15px rgba(0, 198, 255, 0.4);
    transform: translateY(-3px);
}
/* 记忆游戏 */
.memory-game {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    perspective: 1000px;
    display: none; /* Initially hidden */
}
.memory-card {
    width: 100%;
    height: 0;
    padding-bottom: 100%;
    position: relative;
    cursor: pointer;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: transform 0.6s;
    -moz-transition: transform 0.6s;
    -ms-transition: transform 0.6s;
    -o-transition: transform 0.6s;
    transition: transform 0.6s;
}
.memory-card.flipped {
    -webkit-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    -ms-transform: rotateY(180deg);
    -o-transform: rotateY(180deg);
    transform: rotateY(180deg);
}
.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}
.card-front {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    -webkit-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    -ms-transform: rotateY(180deg);
    -o-transform: rotateY(180deg);
    transform: rotateY(180deg);
}
.card-back {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
}
.game-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    padding: 10px 0;
}
.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}
/* 赠言生成器 */
.wish-generator {
    background: linear-gradient(135deg, rgba(0, 198, 255, 0.1), rgba(0, 114, 255, 0.1));
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    margin-top: 20px;
    border: 1px solid rgba(0, 198, 255, 0.2);
}
#wish-text {
    font-size: 1.3rem;
    font-style: italic;
    margin: 20px 0;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(10, 25, 41, 0.3);
    border-radius: 15px;
    line-height: 1.8;
    border: 1px dashed var(--glass-border);
}
.btn {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: white;
  border: none;
    padding: 14px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
  cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 114, 255, 0.3);
}
footer {
    text-align: center;
    padding: 50px 20px 30px;
    margin-top: 80px;
    border-top: 1px solid var(--glass-border);
}
.footer-content {
    max-width: 700px;
    margin: 0 auto;
}
.privacy-notice {
    background: rgba(10, 25, 41, 0.5);
    padding: 20px;
    border-radius: 15px;
    margin: 30px 0;
    font-size: 0.9rem;
    border: 1px solid var(--glass-border);
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 30px 0;
}
.social-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0, 114, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-light);
    transition: var(--transition);
    border: 1px solid var(--glass-border);
}
.social-link:hover {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 114, 255, 0.3);
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.floating {
    -webkit-animation: float 3s ease-in-out infinite;
    -moz-animation: float 3s ease-in-out infinite;
    -o-animation: float 3s ease-in-out infinite;
    animation: float 3s ease-in-out infinite;
}
.pulse {
    -webkit-animation: pulse 0.5s ease;
    -moz-animation: pulse 0.5s ease;
    -o-animation: pulse 0.5s ease;
    animation: pulse 0.5s ease;
}
@-webkit-keyframes pulse {
    0%, 100% { -webkit-transform: scale(1); transform: scale(1); }
    50% { -webkit-transform: scale(1.05); transform: scale(1.05); }
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
}
    .hero p {
        font-size: 1.1rem;
}
    .nav-links {
        display: none;
    }
    .dashboard {
        grid-template-columns: 1fr;
    }
    .memory-game {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 480px) {
    .memory-game {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .card-front, .card-back {
        font-size: 1.5rem;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
}