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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #333;
    background-color: #f0f8f0;
    position: relative;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 128, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e8f5e8;
}

header h1 {
    color: #2d8f47;
    margin-bottom: 12px;
    font-size: 2.2rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(45, 143, 71, 0.1);
}

.update-time {
    color: #6b8e6b;
    font-size: 0.95rem;
    background-color: #f0f8f0;
    padding: 8px 16px;
    border-radius: 20px;
    display: inline-block;
}

.topic-list {
    list-style: none;
}

.topic-item {
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 12px;
    background-color: white;
    box-shadow: 0 3px 10px rgba(0, 128, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
    position: relative;
}

.topic-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 128, 0, 0.15);
    border-left-color: #4caf50;
}

.topic-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 12px;
}

.topic-rank {
    font-size: 1.3rem;
    font-weight: bold;
    color: #4caf50;
    margin-right: 18px;
    min-width: 35px;
    text-align: center;
    background-color: #f0f8f0;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.topic-rank.top-1 {
    background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
    color: white;
}

.topic-rank.top-2 {
    background: linear-gradient(135deg, #ffa726, #ffb74d);
    color: white;
}

.topic-rank.top-3 {
    background: linear-gradient(135deg, #ffca28, #ffd54f);
    color: white;
}

.topic-content {
    flex: 1;
}

.topic-title {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: #2c3e2c;
    text-decoration: none;
    display: block;
    line-height: 1.4;
    font-weight: 600;
}

.topic-title:hover {
    color: #2d8f47;
    text-decoration: underline;
}

.topic-detail {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.topic-stats {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
    color: #888;
    margin-top: 10px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.hot-value {
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.8rem;
}

.topic-cover {
    width: 80px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    margin-left: 15px;
    flex-shrink: 0;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #6b8e6b;
    font-size: 1.1rem;
}

footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e8f5e8;
    color: #6b8e6b;
    font-size: 0.9rem;
}

/* 平板端适配 (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 768px) {
    .container {
        max-width: 90%;
        padding: 18px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .topic-item {
        padding: 18px;
    }
    
    .topic-title {
        font-size: 1.15rem;
    }
    
    .topic-cover {
        width: 70px;
        height: 50px;
    }
}

/* 手机端适配 (最大768px) */
@media (max-width: 768px) {
    body {
        background-color: #f8fdf8;
    }
    
    .container {
        max-width: 95%;
        margin: 10px auto;
        padding: 15px;
        border-radius: 8px;
    }
    
    header {
        margin-bottom: 20px;
        padding-bottom: 15px;
    }
    
    header h1 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .update-time {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
    
    .topic-item {
        padding: 16px;
        margin-bottom: 12px;
        border-radius: 8px;
    }
    
    .topic-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .topic-rank {
        font-size: 1.1rem;
        margin-right: 0;
        margin-bottom: 10px;
        width: 30px;
        height: 30px;
        align-self: flex-start;
    }
    
    .topic-title {
        font-size: 1.05rem;
        line-height: 1.5;
        margin-bottom: 6px;
    }
    
    .topic-detail {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .topic-stats {
        flex-wrap: wrap;
        gap: 10px;
        font-size: 0.8rem;
    }
    
    .topic-cover {
        width: 60px;
        height: 45px;
        margin-left: 10px;
    }
    
    footer {
        margin-top: 20px;
        padding-top: 15px;
        font-size: 0.8rem;
    }
}

/* 小屏手机适配 (最大480px) */
@media (max-width: 480px) {
    .container {
        margin: 5px auto;
        padding: 12px;
    }
    
    header h1 {
        font-size: 1.6rem;
    }
    
    .topic-item {
        padding: 14px;
        margin-bottom: 10px;
    }
    
    .topic-rank {
        font-size: 1rem;
        width: 28px;
        height: 28px;
    }
    
    .topic-title {
        font-size: 1rem;
    }
    
    .topic-detail {
        font-size: 0.85rem;
    }
    
    .topic-cover {
        width: 50px;
        height: 38px;
        margin-left: 8px;
    }
    
    .update-time {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
}