* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    color: #fff;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 返回按钮 */
.back-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 100;
}

.back-btn a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.3);
    color: #ffd700;
    padding: 10px 20px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.back-btn a:hover {
    background: rgba(255, 215, 0, 0.2);
    transform: translateX(-5px);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #ffd700, transparent);
}

.title {
    font-size: 2.8rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 10px;
    background: linear-gradient(90deg, #ffd700, #ffaa00);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.subtitle {
    font-size: 1.1rem;
    color: #a0c8ff;
    letter-spacing: 1px;
    font-weight: 300;
}

.no-ranking {
    display: inline-block;
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.3);
    color: #ffd700;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-top: 10px;
}

/* 统计信息 */
.stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    margin-bottom: 60px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 20px 25px;
    text-align: center;
    min-width: 160px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 215, 0, 0.3);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #a0c8ff;
}

/* 感谢语 */
.thank-you {
    background: rgba(255, 215, 0, 0.05);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.thank-you::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.05) 0%, transparent 70%);
    z-index: -1;
}

.thank-you h3 {
    color: #ffd700;
    margin-bottom: 15px;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.thank-you p {
    color: #b0c4ff;
    line-height: 1.8;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* 赞助者网格 */
.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

.sponsor-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.sponsor-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 215, 0, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.sponsor-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(45deg, #ffd700, #ffaa00);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 20px;
    color: #000;
}

.sponsor-name {
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 10px;
    color: #fff;
}

.sponsor-amount {
    font-size: 1.6rem;
    font-weight: 700;
    color: #ffd700;
    text-align: center;
    margin-bottom: 15px;
}

.sponsor-date {
    color: #a0c8ff;
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 15px;
}

.sponsor-message {
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid #ffd700;
    padding: 12px;
    border-radius: 5px;
    font-style: italic;
    color: #b0c4ff;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 随机排序提示 */
.random-note {
    text-align: center;
    color: #88aabb;
    font-size: 0.9rem;
    margin-bottom: 30px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
}

/* 底部 */
.footer {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #88aabb;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sponsors-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    .stats {
        gap: 15px;
    }
    .stat-item {
        min-width: 140px;
        padding: 15px 20px;
    }
    .stat-value {
        font-size: 1.8rem;
    }
    .back-btn {
        position: relative;
        top: 0;
        left: 0;
        margin-bottom: 20px;
    }
    .title {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .sponsors-grid {
        grid-template-columns: 1fr;
    }
    .stat-item {
        min-width: calc(50% - 10px);
    }
}

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

.sponsor-card {
    animation: fadeIn 0.5s ease-out;
}

.sponsor-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.sponsor-card:nth-child(even) {
    animation-delay: 0.2s;
}