/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff6b6b;
    --secondary-color: #4ecdc4;
    --accent-color: #45b7d1;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    overflow-x: hidden;
}

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

/* 粒子背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.nav-logo i {
    margin-right: 0.5rem;
    animation: pulse 2s infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient-2);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
    color: white;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-family: 'Orbitron', monospace;
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.2rem;
    margin: 2rem 0;
    opacity: 0.8;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-2);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

.countdown {
    display: flex;
    gap: 1rem;
    margin-top: 3rem;
}

.countdown-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    min-width: 80px;
}

.countdown-item span:first-child {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    font-family: 'Orbitron', monospace;
}

.hero-visual {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.floating-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    animation: float 3s ease-in-out infinite;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.floating-card:nth-child(2) {
    animation-delay: -1s;
}

.floating-card:nth-child(3) {
    animation-delay: -2s;
}

.floating-card:hover {
    transform: scale(1.1);
}

.floating-card i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

/* 通用区块样式 */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-family: 'Orbitron', monospace;
    margin-bottom: 3rem;
    color: var(--dark-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 3px;
    background: var(--gradient-2);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* 关于我们 */
.about {
    background: var(--light-color);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.about-card:hover {
    transform: translateY(-10px);
}

.card-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    font-family: 'Orbitron', monospace;
}

.stat-label {
    color: var(--dark-color);
    font-weight: 500;
}

/* 比赛规则 */
.rules {
    background: white;
}

.rules-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.rule-category {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.rule-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rule-category ul {
    list-style: none;
}

.rule-category li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.rule-category li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* 参赛选手 */
.contestants {
    background: var(--light-color);
}

.contestants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contestant-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.contestant-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.contestant-avatar {
    width: 150px;
    height: 150px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-color);
}

.contestant-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contestant-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.skills {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.skill-tag {
    background: var(--gradient-1);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* 赛程安排 */
.schedule {
    background: white;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 4px;
    background: var(--gradient-2);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline-item {
    padding: 1rem 2rem;
    position: relative;
    background: inherit;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background: var(--primary-color);
    border: 4px solid white;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-date {
    background: var(--gradient-2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 1rem;
    font-weight: bold;
}

.timeline-content {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

/* 报名区域 */
.register {
    background: var(--gradient-1);
    color: white;
}

.register .section-title {
    color: white;
}

.register-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.register-info h3 {
    margin-bottom: 1rem;
    color: white;
}

.register-info ul {
    list-style: none;
    margin-bottom: 2rem;
}

.register-info li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.register-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4ecdc4;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #4ecdc4;
    margin-bottom: 0.5rem;
}

.price span {
    font-size: 1rem;
    opacity: 0.8;
}

.note {
    opacity: 0.8;
    font-style: italic;
}

.register-form {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(5px);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--gradient-2);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    padding: 0.25rem 0;
}

.footer-section ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--gradient-2);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
}

/* 动画 */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .register-container {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        width: 100%;
        left: 0;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item::after {
        left: 10px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .countdown {
        flex-direction: column;
        align-items: center;
    }
    
    .countdown-item {
        min-width: 100px;
    }
}