:root {
    --primary-color: #2C3E50;
    --secondary-color: #34495E;
    --accent-color: #E74C3C;
    --text-color: #2C3E50;
    --light-bg: #F8F9FA;
    --dark-bg: #2C3E50;
    --card-bg: #FFFFFF;
    --border-color: #E9ECEF;
}

body {
    background-color: var(--light-bg);
    color: var(--text-color);
}

.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-primary:hover {
    background-color: #c0392b;
    border-color: #c0392b;
}

.btn-outline-primary {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-outline-primary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.card {
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    border-bottom: 1px solid var(--border-color);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.1;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-image {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-shape {
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: rotate(45deg);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.stat-item p {
    font-size: 1.1rem;
    margin: 0;
    opacity: 0.8;
}

footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    color: var(--text-color);
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #c0392b;
    text-decoration: none;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 文本选择颜色 */
::selection {
    background: var(--accent-color);
    color: white;
}

/* 链接样式 */
a {
    color: var(--accent-color);
    transition: color 0.3s ease;
}

a:hover {
    color: #c0392b;
}

/* 表单元素样式 */
.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(231, 76, 60, 0.25);
}

/* 警告框样式 */
.alert-primary {
    background-color: rgba(44, 62, 80, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.1);
    border-color: #27ae60;
    color: #27ae60;
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.1);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

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

.back-to-top:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

/* 创作者号召部分 */
.creator-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    position: relative;
    overflow: hidden;
}

.creator-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.1;
}

.creator-cta .container {
    position: relative;
    z-index: 1;
}

.creator-cta .btn-light {
    background-color: white;
    color: var(--primary-color);
    border: none;
    transition: all 0.3s ease;
}

.creator-cta .btn-light:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.hero-gradient {
    background: linear-gradient(90deg, #2a4bff 0%, #6a82fb 100%);
    color: #fff;
}

.stats-grid {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}
.stats-grid .stat-item {
    background: rgba(255,255,255,0.08);
    border-radius: 1rem;
    padding: 2rem 1.5rem;
    text-align: center;
    min-width: 140px;
    box-shadow: 0 2px 8px 0 rgba(42,75,255,0.08);
}
.stats-grid .stat-icon {
    color: #fff;
    background: rgba(42,75,255,0.18);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.5rem auto;
}
.stats-grid .stat-icon i {
    color: #fff;
    line-height: 1;
}

/* 保证按钮在深色背景下可见 */
.hero-gradient .btn-outline-light {
    border-color: #fff;
    color: #fff;
}
.hero-gradient .btn-outline-light:hover {
    background: #fff;
    color: #2a4bff;
} 

.avatar-wrapper {
    position: relative;
    padding-top: 100%; /* 控制比例 */
    overflow: hidden;
}

.avatar-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}