/* 全局重置和基础样式 - 海螺白底版 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background-color: #F5F7F9; /* 修改：浅灰背景 */
    color: #1D1D1F;            /* 修改：深色文字 */
    line-height: 1.6;
    overflow-x: hidden;
}

/* 侧边导航栏样式 */
.sidebar {
    width: 240px;
    background: #FFFFFF;       /* 修改：纯白背景 */
    border-right: 1px solid #E5E7EB; /* 修改：浅灰边框 */
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.03); /* 修改：极淡阴影 */
}

/* Logo区域 */
.logo-section {
    padding: 24px 20px;
    border-bottom: 1px solid transparent; /* 移除分割线 */
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: #F3F4F6; /* 修改：浅灰底 */
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon i {
    color: #6366F1;
    font-size: 18px;
}

.logo-text h3 {
    font-size: 16px;
    font-weight: 800;
    color: #1D1D1F; /* 修改：深色 */
    margin: 0;
}

.logo-text span {
    font-size: 12px;
    color: #86868B; /* 修改：灰色 */
    font-weight: 400;
}

/* 导航菜单 */
.nav-section {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: #666666; /* 修改：深灰 */
    text-decoration: none;
    border-radius: 12px;
    margin-bottom: 4px;
    transition: all 0.2s ease;
    position: relative;
    font-weight: 500;
    border: 1px solid transparent;
}

.nav-item:hover {
    color: #1D1D1F;
    background-color: #F3F4F6; /* 修改：浅灰悬停 */
    border-color: transparent;
    box-shadow: none;
    transform: none;
}

.nav-item:focus, .nav-item:active {
    outline: none;
    background: #E5E7EB;
}

.nav-item.active {
    color: #6366F1; /* 修改：紫色文字 */
    border: 1px solid rgba(99,102,241,0.1);
    background: #EEF2FF; /* 修改：极淡紫背景 */
    box-shadow: none;
    font-weight: 600;
}

.nav-item i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.nav-item span:not(.badge) {
    font-size: 14px;
}

.badge {
    background: #FFF1F0; /* 修改：浅红背景 */
    color: #FF4D4F;      /* 修改：红色文字 */
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 6px;
    margin-left: auto;
    font-weight: 700;
}

/* 用户信息区域 */
.user-section {
    padding: 20px;
    border-top: 1px solid #E5E7EB; /* 修改：浅灰线 */
    background: #FFFFFF;
}

.user-info {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.user-avatar {
    width: 48px;
    height: 48px;
    background: #F3F4F6; /* 修改 */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #9CA3AF;
}

.user-avatar i { font-size: 20px; }

.user-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.username {
    font-size: 14px;
    font-weight: 600;
    color: #1D1D1F; /* 修改 */
    line-height: 1.2;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.credits {
    font-size: 11px;
    color: #6366F1; /* 修改：紫色 */
    display: flex;
    align-items: center;
    gap: 4px;
    background: transparent;
    border: none;
    padding: 0;
    font-weight: 600;
}

.user-actions { display: flex; gap: 8px; }

.btn-profile {
    flex: 1;
    color: #fff;
    border: none;
    background: #1D1D1F; /* 修改：黑色按钮 */
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-profile:hover {
    background: #333;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 32px 40px;
    background: #F5F7F9; /* 修改：浅灰背景 */
    min-height: 100vh;
}

.header { text-align: center; margin-bottom: 48px; }

.header h1 {
    font-size: 32px;
    font-weight: 800;
    color: #1D1D1F; /* 修改：深黑 */
    background: none;
    -webkit-text-fill-color: initial;
    margin-bottom: 12px;
    letter-spacing: -0.025em;
}

.header p {
    font-size: 16px;
    color: #6B7280; /* 修改：灰 */
    max-width: 600px;
    margin: 0 auto;
    font-weight: 400;
}

/* 功能卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.feature-card {
    background: #FFFFFF; /* 修改：纯白 */
    border: 1px solid #E5E7EB; /* 修改：浅边框 */
    border-radius: 20px;
    padding: 24px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02); /* 修改：淡阴影 */
}

.feature-card::before { display: none; } /* 移除原有光效 */

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
    border-color: rgba(99,102,241,0.2);
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: #1D1D1F; /* 修改 */
    margin-bottom: 8px;
}

.feature-content p {
    font-size: 14px;
    color: #6B7280; /* 修改 */
    line-height: 1.6;
    margin-bottom: 16px;
}

.feature-cost {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #F0FDF4; /* 修改：极浅绿 */
    border: 1px solid transparent;
    color: #10B981;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    width: fit-content;
}

.feature-btn {
    width: 100%;
    background: #6366F1; /* 修改：纯色紫 */
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.feature-btn:hover {
    background: #4F46E5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}

/* 弹窗通用样式 (Auth, Confirm, etc) */
.auth-modal, .confirm-modal, .loading-modal {
    background: #FFFFFF !important; /* 修改：纯白 */
    border: 1px solid #E5E7EB !important;
    border-radius: 24px !important;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15) !important;
    color: #1D1D1F !important;
}

.auth-modal-title, .confirm-title {
    color: #1D1D1F !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
}

.auth-modal-close {
    background: #F3F4F6 !important;
    border: none !important;
    color: #9CA3AF !important;
}

/* 输入框通用 */
input, textarea {
    background: #F9FAFB !important; /* 修改：浅灰底 */
    border: 1px solid #E5E7EB !important;
    color: #1D1D1F !important; /* 修改：深色字 */
    border-radius: 12px !important;
}
input:focus, textarea:focus {
    background: #FFFFFF !important;
    border-color: #6366F1 !important;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.1) !important;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .mobile-header {
        background: #FFFFFF; /* 修改 */
        border-bottom: 1px solid #E5E7EB;
        box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .mobile-logo span { color: #1D1D1F; }
    .mobile-menu-btn { color: #333; background: #f3f4f6; border: none; }
    
    .sidebar {
        background: #FFFFFF;
        border-right: none;
        box-shadow: 4px 0 20px rgba(0,0,0,0.1);
    }
    
    .main-content {
        margin-left: 0;
        background: #F5F7F9;
        padding: 20px 16px;
    }
}

/* 背景装饰清除 */
body::before { display: none; } /* 移除原来的背景光晕 */

/* Toast 提示修正为白底 */
.toast {
    background: #FFFFFF !important;
    border: 1px solid #E5E7EB !important;
    color: #333 !important;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12) !important;
}
.toast-title { color: #1D1D1F; }
.toast-message { color: #6B7280; }