:root {
    --primary-color: #ff4655;
    --secondary-color: #0fb6d6;
    --accent-color: #ffc414;
    --text-color: #ffffff;
    --bg-color: #0a1128;
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.2);
    --card-shadow: rgba(0, 0, 0, 0.3);
    --glass-blur: 10px;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    background: linear-gradient(135deg, var(--bg-color), #1a2a52);
    background-color: var(--bg-color); /* 確保有基本背景色 */
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    -webkit-text-size-adjust: 100%; /* 防止 iOS 自動調整字體大小 */
}

/* Stars Background Animation */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: transparent;
    overflow: hidden;
    pointer-events: none; /* 確保不會干擾點擊事件 */
}

.stars::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, white, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 40px 70px, white, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 50px 160px, white, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 90px 40px, white, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 130px 80px, white, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 160px 120px, white, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: stars 3s linear infinite;
    opacity: 0.5;
    -webkit-animation: stars 3s linear infinite; /* Safari 支持 */
    will-change: transform; /* 提高動畫性能 */
}

@keyframes stars {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-200px);
    }
}

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

/* Glass Card Effect */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: 15px;
    border: 1px solid var(--card-border);
    box-shadow: 0 8px 32px 0 var(--card-shadow);
    padding: 30px;
    margin: 30px 0;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    position: relative; /* 確保定位正確 */
    z-index: 1; /* 確保在背景之上 */
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 var(--card-shadow);
}

/* Header Styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 60px;
    width: auto;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-color);
    text-shadow: 0 0 10px rgba(255, 70, 85, 0.7);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all var(--transition-speed);
}

nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
}

.btn-signup {
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 700;
    transition: all var(--transition-speed);
}

.btn-signup:hover {
    background: #e63e4c;
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(255, 70, 85, 0.7);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 50px 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: linear-gradient(135deg, rgba(255, 70, 85, 0.2), rgba(15, 182, 214, 0.2));
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.highlight {
    color: var(--accent-color);
    font-weight: 700;
}

.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: 700;
    text-decoration: none;
    margin-top: 20px;
    transition: all var(--transition-speed);
    font-size: 1.2rem;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: #e63e4c;
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 70, 85, 0.7);
}

/* Info Section */
.section-info h2, 
.section-format h2, 
.section-rules h2, 
.section-rewards h2, 
.section-signup h2,
.section-contact h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: var(--accent-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    text-align: center;
}

.info-item {
    padding: 20px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-speed);
}

.info-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
}

.info-item i {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.info-item h3 {
    margin-bottom: 10px;
    color: var(--accent-color);
}

/* Format Section */
.format-list, .rules-list, .notice-list {
    list-style: none;
    margin-left: 20px;
}

.format-list li, .rules-list li, .notice-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
}

.format-list i, .rules-list i {
    color: var(--secondary-color);
    margin-right: 10px;
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* Rules Section */
.rules-list i {
    color: var(--primary-color);
}

/* Rewards Section */
.rewards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    text-align: center;
}

.reward-item {
    padding: 20px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.reward-item:hover {
    transform: translateY(-5px);
}

.reward-item.first {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.05));
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.reward-item.second {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.2), rgba(192, 192, 192, 0.05));
    border: 1px solid rgba(192, 192, 192, 0.3);
}

.reward-item.third {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.2), rgba(205, 127, 50, 0.05));
    border: 1px solid rgba(205, 127, 50, 0.3);
}

.medal {
    font-size: 3rem;
    margin-bottom: 15px;
}

.reward-item h3 {
    margin-bottom: 10px;
    color: var(--accent-color);
}

/* Google 表單樣式 */
.google-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-description {
    font-size: 1.2rem;
    text-align: center;
    color: var(--text-color);
    margin: 0;
}

.btn-google-form {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}

.btn-google-form:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.5);
}

.btn-google-form:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(var(--accent-rgb), 0.4);
}

.btn-google-form i {
    font-size: 1.3rem;
}

/* Contact Section */
.contact-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-item i {
    font-size: 1.5rem;
    color: #5865F2; /* Discord color */
}

.discord-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--card-border);
}

.btn-discord {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background: #5865F2; /* Discord color */
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(88, 101, 242, 0.4);
}

.btn-discord:hover {
    background: #4752c4;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.6);
}

.btn-discord:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(88, 101, 242, 0.5);
}

.btn-discord i {
    font-size: 1.3rem;
}

/* Footer */
footer {
    margin-top: 50px;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--card-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.slogan {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent-color);
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        padding: 15px 0;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }

    nav a {
        padding: 8px 10px;
        font-size: 0.9rem;
    }

    .logo-img {
        height: 50px;
    }

    .logo h1 {
        font-size: 1.5rem;
        text-align: center;
    }

    .hero h2 {
        font-size: 1.7rem;
    }

    .hero p {
        font-size: 1.05rem;
        margin-bottom: 15px;
    }

    .hero-content {
        padding: 25px;
    }

    .info-grid, .rewards-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .glass-card {
        padding: 20px;
        margin: 15px 0;
    }

    .section-info h2, 
    .section-format h2, 
    .section-rules h2, 
    .section-rewards h2, 
    .section-signup h2,
    .section-contact h2 {
        font-size: 1.7rem;
        margin-bottom: 20px;
    }

    .btn-primary, .btn-google-form, .btn-discord {
        width: 100%;
        justify-content: center;
    }
    
    .format-list li, .rules-list li, .notice-list li {
        margin-bottom: 12px;
    }
    
    .format-list i, .rules-list i {
        margin-top: 3px;
    }
    
    .google-form {
        padding: 1.5rem;
    }
    
    .contact-info {
        gap: 20px;
    }
    
    /* 確保背景在移動設備上顯示 */
    body {
        background-attachment: fixed;
    }
    
    /* 增強星星背景在移動設備上的可見性 */
    .stars::before {
        opacity: 0.7;
    }
    
    /* 調整頁腳在平板上的顯示 */
    footer {
        margin-top: 30px;
        padding: 20px 0;
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo {
        flex-direction: column;
        text-align: center;
    }

    .logo h1 {
        font-size: 1.1rem;
        text-align: center;
        padding: 0 5px;
    }

    .logo-img {
        height: 45px;
    }

    .hero h2 {
        font-size: 1.3rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .btn-primary {
        padding: 12px 20px;
        font-size: 1rem;
    }

    .info-item, .reward-item {
        padding: 12px;
    }

    .info-item i {
        font-size: 1.5rem;
    }

    .info-item h3 {
        font-size: 1rem;
    }

    .info-item p {
        font-size: 0.9rem;
    }

    .format-list li, .rules-list li, .notice-list li {
        font-size: 0.9rem;
        margin-bottom: 10px;
    }

    .section-info h2, 
    .section-format h2, 
    .section-rules h2, 
    .section-rewards h2, 
    .section-signup h2,
    .section-contact h2 {
        font-size: 1.5rem;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .btn-google-form, .btn-discord {
        padding: 10px 15px;
        font-size: 0.95rem;
    }

    .form-description {
        font-size: 1rem;
    }

    .notice-list li {
        align-items: flex-start;
    }

    .glass-card {
        padding: 15px;
        margin: 15px 0;
    }
}

/* iOS 設備特定樣式 */
@supports (-webkit-touch-callout: none) {
    /* iOS 設備特有的 CSS */
    body {
        background: var(--bg-color); /* 簡化背景，確保顯示 */
    }
    
    /* 為 iOS 設備添加漸變背景 */
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--bg-color), #1a2a52);
        z-index: -2;
    }
    
    /* 調整星星背景，確保在 iOS 上顯示 */
    .stars::before {
        background-attachment: fixed;
        transform: none !important;
        -webkit-transform: none !important;
        animation: none;
        -webkit-animation: none;
    }
    
    /* 為 iOS 設備添加靜態星星 */
    .stars::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: 
            radial-gradient(2px 2px at 20px 30px, white, rgba(0,0,0,0)),
            radial-gradient(2px 2px at 40px 70px, white, rgba(0,0,0,0)),
            radial-gradient(2px 2px at 50px 160px, white, rgba(0,0,0,0)),
            radial-gradient(2px 2px at 90px 40px, white, rgba(0,0,0,0)),
            radial-gradient(2px 2px at 130px 80px, white, rgba(0,0,0,0)),
            radial-gradient(2px 2px at 160px 120px, white, rgba(0,0,0,0));
        background-repeat: repeat;
        background-size: 200px 200px;
        opacity: 0.7;
        z-index: -1;
    }
}

/* Extra Small Mobile Devices */
@media (max-width: 375px) {
    .logo h1 {
        font-size: 0.95rem;
    }
    
    .logo-img {
        height: 40px;
    }
    
    .hero h2 {
        font-size: 1.2rem;
    }
    
    .hero p {
        font-size: 0.9rem;
    }
    
    .btn-primary {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .section-info h2, 
    .section-format h2, 
    .section-rules h2, 
    .section-rewards h2, 
    .section-signup h2,
    .section-contact h2 {
        font-size: 1.3rem;
    }
    
    .info-item i {
        font-size: 1.3rem;
    }
    
    .format-list li, .rules-list li, .notice-list li {
        font-size: 0.85rem;
    }
    
    .btn-google-form, .btn-discord {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    
    .glass-card {
        padding: 12px;
        margin: 12px 0;
    }
}

/* Animation Effects */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

section {
    animation: fadeIn 0.8s ease-out forwards;
}

section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.2s; }
section:nth-child(4) { animation-delay: 0.3s; }
section:nth-child(5) { animation-delay: 0.4s; }
section:nth-child(6) { animation-delay: 0.5s; }
section:nth-child(7) { animation-delay: 0.6s; }