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

/* 微信浏览器优化 */
body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    /* 防止微信浏览器字体缩放 */
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    /* 优化触摸滚动 */
    -webkit-overflow-scrolling: touch;
    /* 防止微信浏览器下拉刷新 */
    overscroll-behavior: none;
}

/* 微信浏览器图片优化 */
img {
    max-width: 100%;
    height: auto;
    /* 防止图片在微信中变形 */
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
}

/* 微信浏览器按钮优化 */
button, .activity-btn {
    /* 移除iOS默认按钮样式 */
    -webkit-appearance: none;
    appearance: none;
    /* 防止点击高亮 */
    -webkit-tap-highlight-color: transparent;
    /* 优化触摸反馈 */
    touch-action: manipulation;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}
ul{
    padding-left: 20px; /* 增加ul的左侧内边距 */
}
ol{
    padding-left: 20px; /* 增加ul的左侧内边距 */
}
li {
    padding-left: 10px; /* 增加li的左侧内边距 */
}
/* 顶部栏样式 */
.topbar {
    background-color: #ffffff;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}
.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}
.brand-logo {
    width: 32px;
    height: 32px;
}
.brand-title {
    font-size: 18px;
    color: #1890ff;
    font-weight: 600;
}

/* 用户信息样式 */
.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.user-name {
    font-size: 14px;
    color: #333;
    font-weight: 500;
}

/* 退出按钮样式 */
.logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    border: 1px solid #e8e8e8;
    border-radius: 4px;
    background-color: #f5f5f5;
    color: #666;
    text-decoration: none;
    font-size: 12px;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background-color: #ff4d4f;
    color: #fff;
    border-color: #ff4d4f;
}

.logout-btn:active {
    transform: translateY(1px);
}

/* 头像样式 */
.profile-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

/* 账户信息水平排列样式 */
.profile-header.horizontal {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px 0;
}

.profile-header.horizontal .avatar-container {
    flex-shrink: 0;
}

.profile-header.horizontal .profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-header.horizontal .profile-info h3 {
    margin: 0 0 8px 0;
    font-size: 20px;
    color: #2c3e50;
}

.profile-header.horizontal .profile-info p {
    margin: 0;
    font-size: 14px;
    color: #666;
}

.auth-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.auth-btn {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.auth-login {
    background-color: #1890ff;
    color: #fff;
    box-shadow: 0 2px 6px rgba(24, 144, 255, 0.3);
}
.auth-signup {
    background-color: #52c41a;
    color: #fff;
    box-shadow: 0 2px 6px rgba(82, 196, 26, 0.3);
}
.auth-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

header {
    text-align: center;
    margin-bottom: 35px;
}
h1 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 600;
    position: relative;
    display: inline-block;
}
h1:after {
    content: '';
    position: absolute;
    width: 60px;
    height: 3px;
    background-color: #1890ff;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* 轮播图样式 */
.carousel-container {
    position: relative;
    width: 100%;
    height: 400px;
    margin-bottom: 30px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.carousel-slides {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), rgba(0,0,0,0));
    color: white;
    text-align: center;
}

.carousel-caption h2 {
    font-size: 32px;
    margin-bottom: 10px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.carousel-caption p {
    font-size: 18px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background-color: white;
    transform: scale(1.2);
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background-color: rgba(0,0,0,0.3);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-control:hover {
    background-color: rgba(0,0,0,0.6);
}

.carousel-control.prev {
    left: 20px;
}

.carousel-control.next {
    right: 20px;
}

.filter-section {
    background-color: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.filter-group {
    margin-bottom: 15px;
}
.filter-title {
    font-weight: bold;
    margin-right: 15px;
    display: inline-block;
    width: 60px;
    color: #2c3e50;
}
.filter-options {
    display: inline-flex;
    flex-wrap: wrap;
}
.filter-option {
    margin: 5px;
    padding: 6px 15px;
    background-color: #f0f0f0;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}
.filter-option:hover {
    background-color: #e6f7ff;
    color: #1890ff;
}
.filter-option.active {
    background-color: #1890ff;
    color: white;
    box-shadow: 0 2px 6px rgba(24, 144, 255, 0.3);
}
.activity-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}
.activity-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.05);
}
.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}
.activity-image {
    height: 180px;
    overflow: hidden;
    position: relative;
}
.activity-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.activity-card:hover .activity-image img {
    transform: scale(1.05);
}
.activity-type {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: rgba(0,0,0,0.7);
    color: white;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    transition: all 0.3s ease;
}

.activity-card:hover .activity-type {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.activity-type.student {
    background-color: rgba(24, 144, 255, 0.8);
}

.activity-type.teacher {
    background-color: rgba(82, 196, 26, 0.8);
}

.activity-type.school {
    background-color: rgba(250, 173, 20, 0.8);
}
.activity-content {
    padding: 20px;
}
.activity-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 48px;
    color: #2c3e50;
}
.activity-info {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
}
.icon-time, .icon-location, .icon-grade {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 6px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666'%3E%3Cpath d='M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10 10-4.5 10-10S17.5 2 12 2zm1 10.9l3.4 2c.4.2.5.7.3 1.1-.2.4-.7.5-1.1.3L12 14.1c-.6-.3-1-.9-1-1.6V7c0-.6.4-1 1-1s1 .4 1 1v5.9z'/%3E%3C/svg%3E");
}
.icon-location {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666'%3E%3Cpath d='M12 2C8.1 2 5 5.1 5 9c0 5.2 7 13 7 13s7-7.8 7-13c0-3.9-3.1-7-7-7zm0 9.5c-1.4 0-2.5-1.1-2.5-2.5s1.1-2.5 2.5-2.5 2.5 1.1 2.5 2.5-1.1 2.5-2.5 2.5z'/%3E%3C/svg%3E");
}
.icon-grade {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666'%3E%3Cpath d='M5 13.18v4L12 21l7-3.82v-4L12 17l-7-3.82zM12 3L1 9l11 6 9-4.91V17h2V9L12 3z'/%3E%3C/svg%3E");
}
.icon-people {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 6px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666'%3E%3Cpath d='M16 11c1.7 0 3-1.3 3-3s-1.3-3-3-3-3 1.3-3 3 1.3 3 3 3zm-8 0c1.7 0 3-1.3 3-3S9.7 5 8 5 5 6.3 5 8s1.3 3 3 3zm0 2c-2.3 0-7 1.2-7 3.5V19h14v-2.5C15 14.2 10.3 13 8 13zm8 0c-.3 0-.7 0-1 .1 1.2.7 2 1.6 2 2.9V19h7v-2.5c0-2.3-4.7-3.5-8-3.5z'/%3E%3C/svg%3E");
}

/* 时间状态行布局 */
.time-status-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    grid-column: 1 / -1; /* 占据整行 */
    margin-bottom: 8px;
}

.time-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.time-status-row .status-tag {
    flex-shrink: 0;
    align-self: center;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .time-status-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 8px;
    }
    
    .time-info {
        flex: 1;
        min-width: 0; /* 防止内容溢出 */
    }
    
    .time-status-row .status-tag {
        flex-shrink: 0;
        align-self: flex-start;
        margin-top: 10px; /* 微调垂直对齐 */
    }
    
    /* 在极小屏幕上调整字体大小 */
    @media (max-width: 480px) {
        .time-info .activity-info {
            font-size: 13px;
        }
        
        .time-status-row .status-tag {
            font-size: 11px;
            padding: 3px 8px;
        }
    }
}
.detail-actions {
    display: flex;
    gap: 12px;
}
.btn-join {
    background-color: #1890ff;
    color: white;
}

.detail-editor {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.06);
}
.editor-toolbar {
    padding: 10px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    background-color: #fafafa;
}
.editor-btn {
    margin: 4px;
    padding: 6px 12px;
    font-size: 14px;
    border: none;
    border-radius: 6px;
    background-color: #e6f7ff;
    color: #1890ff;
    cursor: pointer;
}
.editor-btn:hover {
    opacity: 0.9;
}
.editor-content {
    min-height: 200px;
    padding: 16px;
}

/* 社交操作按钮不变，保持中性背景以区分主次 */
.social-btn { background-color: #f5f7fa; color: #2c3e50; }
.social-btn:hover { background-color: #eef2f7; }

/* 活动描述样式 */
.activity-desc {
    font-size: 14px;
    color: #888;
    margin: 12px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 42px;
    line-height: 1.5;
}

.activity-status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 18px;
}

/* 对齐增强：让状态区域中的按钮垂直居中且高度一致 */
.activity-status .detail-actions,
.activity-status .social-actions {
    align-items: center;
}

.activity-status .activity-btn,
.activity-status .social-btn {
    height: 36px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
}

.social-btn .social-text,
.social-btn .social-count {
    line-height: 1;
    word-wrap: break-word;
}

.status-tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.status-not-started {
    background-color: #e6f7ff;
    color: #1890ff;
    border: 1px solid rgba(24, 144, 255, 0.2);
}

.status-in-progress {
    background-color: #f6ffed;
    color: #52c41a;
    border: 1px solid rgba(82, 196, 26, 0.2);
}

.status-ended {
    background-color: #f5f5f5;
    color: #999;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.activity-btn {
    padding: 6px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 500;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.btn-view {
    background-color: #1890ff;
    color: white;
    box-shadow: 0 2px 6px rgba(24, 144, 255, 0.3);
}

.btn-register {
    background-color: #52c41a;
    color: white;
    box-shadow: 0 2px 6px rgba(82, 196, 26, 0.3);
}

.btn-result {
    background-color: #f5f5f5;
    color: #666;
}

.btn-view:hover, .btn-register:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-view:disabled, .btn-register:disabled {
    background-color: #d9d9d9;
    color: #999;
    cursor: not-allowed;
    box-shadow: none;
}

.login-prompt {
    text-align: center;
    padding: 25px;
    background-color: #fff;
    border-radius: 12px;
    margin-top: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.login-prompt p {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
}

.login-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 25px;
    background-color: var(--primary);
    color: white;
    box-shadow: 0 2px 6px var(--primary-shadow);
    min-height: 36px;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.login-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* 详情页样式 */
.detail-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.05);
    margin-bottom: 24px;
}

.detail-content {
    padding: 20px;
}

.detail-title {
    font-size: 24px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.detail-meta {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px 16px;
    margin-bottom: 12px;
}

/* 提供 focus 的降级可访问性样式（旧浏览器） */
.btn:focus {
  outline: 2px solid var(--primary-outline);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .btn, .activity-btn, .login-btn, .btn-view, .btn-register, .btn-result {
    transition: none;
  }
}

/* 注册页容器样式 */
.register-container {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px 20px;
}

/* 注册卡片样式 */
.register-container .card {
  background-color: #fff;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.06);
  max-width: 600px;
  width: 100%;
}

@media (max-width: 768px) {
  .register-container .card {
    padding: 30px 20px;
  }
}

/* 注册标题样式 */
.register-container h1 {
  font-size: 28px;
  margin-bottom: 30px;
  text-align: center;
  color: #2c3e50;
}

.register-container h1:after {
  width: 80px;
  height: 4px;
}

/* 注册表单卡片样式 */
.register-container .form-card {
  margin-top: 24px;
  padding: 24px;
  background-color: #fafafa;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.register-container .form-card h3 {
  font-size: 18px;
  margin-bottom: 20px;
  color: #2c3e50;
  font-weight: 600;
}

/* 单选按钮组样式 */
.register-container .radio-group {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.register-container .radio-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 10px 16px;
  border-radius: 8px;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.register-container .radio-group label:hover {
  background-color: #f0f7ff;
  border-color: rgba(24, 144, 255, 0.2);
}

.register-container .radio-group input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: #1890ff;
}

.register-container .radio-group input[type="radio"]:checked + .seg-text {
  color: #1890ff;
  font-weight: 500;
}

/* 表单组样式 */
.register-container .form-group {
  margin-bottom: 20px;
}

.register-container .form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #333;
  font-size: 14px;
}

.register-container .form-group input[type="text"],
.register-container .form-group input[type="tel"],
.register-container .form-group input[type="password"],
.register-container .form-group input[type="file"] {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.2s ease;
  background-color: #fff;
}

.register-container .form-group input[type="text"]:hover,
.register-container .form-group input[type="tel"]:hover,
.register-container .form-group input[type="password"]:hover {
  border-color: #1890ff;
}

.register-container .form-group input[type="text"]:focus,
.register-container .form-group input[type="tel"]:focus,
.register-container .form-group input[type="password"]:focus {
  outline: none;
  border-color: #1890ff;
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.15);
}

.register-container .form-group input[type="file"] {
  padding: 8px 12px;
  cursor: pointer;
}

/* 行内表单组样式 */
.register-container .form-group.inline {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.register-container .form-group.inline input {
  flex: 1;
}

/* 表单行样式 */
.register-container .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 576px) {
  .register-container .form-row {
    grid-template-columns: 1fr;
  }
  
  .register-container .form-group.inline {
    flex-direction: column;
  }
}

/* 必填项标记 */
.register-container .required {
  color: #ff4d4f;
  margin-left: 4px;
}

/* 通知文本样式 */
.register-container .notice {
  padding: 16px;
  background-color: #fff7e6;
  border: 1px solid #ffe58f;
  border-radius: 8px;
  color: #fa8c16;
  font-size: 14px;
  margin-top: 20px;
}

/* 按钮样式 */
.register-container .btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.register-container .btn-success {
  background-color: #1890ff;
  color: #fff;
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.register-container .btn-success:hover {
  background-color: #40a9ff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(24, 144, 255, 0.4);
}

.register-container .login-btn {
  background-color: #f5f5f5;
  color: #666;
  border: 1px solid #e8e8e8;
}

.register-container .login-btn:hover {
  background-color: #e8e8e8;
  color: #333;
}

.register-container .reg-send-code {
  background-color: #1890ff;
  color: #fff;
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
  padding: 10px 16px;
  white-space: nowrap;
  min-width: 100px;
}

.register-container .reg-send-code:hover {
  background-color: #40a9ff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(24, 144, 255, 0.4);
}

.register-container .reg-send-code:disabled {
  background-color: #d9d9d9;
  color: #999;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* 动作按钮区域 */
.register-container .actions {
  display: flex;
  gap: 16px;
  margin-top: 30px;
  justify-content: center;
}

.register-container .actions .btn {
  flex: 1;
  min-width: 120px;
  height: 40px;
}

@media (max-width: 480px) {
  .register-container .actions {
    flex-direction: column;
    gap: 12px;
  }
  
  .register-container .actions .btn {
    width: 100%;
  }
}

/* 下拉选择框样式 */
:root {
  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  --select-arrow-active: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231890ff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  --select-arrow-disabled: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ccc' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}

.form-group select {
  width: 100%;
  padding: 10px 40px 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  
  /* 隐藏原生箭头 */
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  
  /* 自定义箭头 */
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
}

.form-group select:hover {
  border-color: var(--primary);
}

.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.15);
  background-image: var(--select-arrow-active);
}

.form-group select:focus-visible {
  outline: 2px solid var(--primary-outline);
  outline-offset: 2px;
}

.form-group select:disabled {
  background-color: #f5f5f5;
  color: #999;
  cursor: not-allowed;
  background-image: var(--select-arrow-disabled);
}

.form-group select option {
  color: var(--text);
}

/* 行内布局中的 select 保持宽度一致 */
.form-row .form-group select {
  width: 100%;
}

/* 降低动效，提升可访问性 */
@media (prefers-reduced-motion: reduce) {
  .form-group select {
    transition: none;
  }
}

@media (forced-colors: active) {
  .form-group select {
    border-color: CanvasText;
    background-color: Canvas;
  }
  .form-group select:focus-visible {
    outline: 2px solid Highlight;
  }
}

/* 模态框样式 - 优化版 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.3) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9) translateY(20px);
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 20px;
    box-shadow: 
        0 25px 80px rgba(0, 0, 0, 0.15),
        0 10px 30px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    z-index: 1001;
    width: 90%;
    max-width: 420px;
    min-width: 300px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1) translateY(0);
}

.modal-dialog {
    width: 100%;
}

.modal-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    position: relative;
}

.modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #1d1d1f;
    text-align: center;
    flex: 1;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    letter-spacing: -0.3px;
}

.modal-close {
    background: rgba(0, 0, 0, 0.04);
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: #86868b;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
    z-index: 1;
    line-height: 1;
}

.modal-close:hover {
    color: #1d1d1f;
    background-color: rgba(0, 0, 0, 0.08);
    transform: rotate(90deg);
}

.modal-close:active {
    transform: scale(0.9) rotate(90deg);
    background-color: rgba(0, 0, 0, 0.12);
}

.modal-body {
    padding: 24px;
    font-size: 15px;
    line-height: 1.6;
    color: #1d1d1f;
}

.modal-body p {
    margin: 0;
    text-align: center;
}

.modal-footer {
    padding: 16px 24px 24px;
    border-top: none;
    display: flex;
    justify-content: center;
    gap: 12px;
    background: transparent;
}

.join-message {
    font-size: 16px;
    color: #666;
    margin-bottom: 20px;
    text-align: center;
}

.success-content {
    text-align: center;
    margin-bottom: 20px;
}

.success-message {
    font-size: 18px;
    font-weight: 600;
    color: #52c41a;
    margin-bottom: 12px;
}

.success-info {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #1d1d1f;
    line-height: 1.4;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-sizing: border-box;
    font-family: inherit;
    resize: vertical;
    background-color: #ffffff;
}

.form-group input[type="text"]:hover,
.form-group input[type="tel"]:hover,
.form-group input[type="password"]:hover,
.form-group input[type="email"]:hover,
.form-group textarea:hover {
    border-color: rgba(0, 0, 0, 0.3);
    background-color: #f9f9f9;
}

.form-group input[type="text"]:focus,
.form-group input[type="tel"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0071e3;
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
    background-color: #ffffff;
}

/* 验证码输入框布局 */
.captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.captcha-row input {
    flex: 1;
}

.captcha-code {
    min-width: 100px;
    height: 38px;
    background-color: #f5f5f5;
    border: 1px solid #d9d9d9;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
}

.captcha-code:hover {
    background-color: #e8e8e8;
}

.btn-send-code {
    min-width: 100px;
    height: 38px;
    background-color: #f5f5f5;
    color: #1890ff;
    border: 1px solid #1890ff;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-send-code:hover {
    background-color: #e6f7ff;
}

/* 表单操作按钮 */
.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

/* 链接样式 */
.link-forgot,
.link-signup,
.link-login {
    font-size: 14px;
    color: #0071e3;
    text-decoration: none;
    margin-left: 10px;
    transition: color 0.2s ease;
}

.link-forgot:hover,
.link-signup:hover,
.link-login:hover {
    color: #0077ed;
    text-decoration: underline;
}

.btn-cancel {
    background-color: #f5f5f7;
    color: #1d1d1f;
    border: none;
    border-radius: 12px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    min-width: 100px;
}

.btn-cancel:hover {
    background-color: #e8e8ed;
    color: #1d1d1f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.btn-cancel:active {
    background-color: #dcdcde;
    transform: translateY(0) scale(0.97);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.btn-primary {
    background: linear-gradient(135deg, #0071e3 0%, #0051a3 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.35);
    cursor: pointer;
    min-width: 100px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0077ed 0%, #005bbd 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.45);
}

.btn-primary:active {
    background: linear-gradient(135deg, #0066cc 0%, #004a99 100%);
    transform: translateY(0) scale(0.97);
    box-shadow: 0 3px 10px rgba(0, 113, 227, 0.3);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .modal {
        width: 92%;
        max-width: 360px;
        border-radius: 18px;
    }
    
    .modal-header {
        padding: 18px 20px 14px;
    }
    
    .modal-header h3 {
        font-size: 17px;
    }
    
    .modal-body {
        padding: 20px;
        font-size: 14px;
    }
    
    .modal-footer {
        padding: 14px 20px 20px;
        gap: 10px;
    }
    
    .btn-cancel,
    .btn-primary {
        padding: 11px 22px;
        font-size: 14px;
        min-width: 90px;
        border-radius: 10px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions button {
        width: 100%;
    }
    
    .join-message {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .modal {
        width: 95%;
        max-width: 320px;
    }
    
    .modal-header {
        padding: 16px 18px 12px;
    }
    
    .modal-header h3 {
        font-size: 16px;
    }
    
    .modal-body {
        padding: 18px;
    }
    
    .modal-footer {
        padding: 12px 18px 18px;
    }
    
    .btn-cancel,
    .btn-primary {
        padding: 10px 18px;
        font-size: 14px;
        min-width: 80px;
    }
}

/* 为更小的屏幕添加额外调整 */
@media (max-width: 480px) {
    .modal {
        width: 98%;
        max-width: 320px;
    }
    
    .modal-header,
    .modal-body {
        padding: 12px;
    }
    
    .modal-header h3 {
        font-size: 15px;
    }
    
    .join-message {
        font-size: 13px;
        margin-bottom: 16px;
    }
    
    .form-actions {
        gap: 8px;
        margin-top: 16px;
    }
    
    .activity-btn {
        padding: 8px 12px;
        font-size: 13px;
        min-height: 32px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .modal-close {
        width: 36px;
        height: 36px;
        font-size: 28px;
    }
    
    .activity-btn {
        min-height: 40px;
        padding: 10px 16px;
    }
}