/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif;
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    min-height: 100vh;
    color: #1d1d1f;
    line-height: 1.6;
}

/* 首页样式 */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 102, 0, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(26, 61, 124, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 16px 32px;
    background: #ffffff;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.logo-icon {
    font-size: 36px;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: #FF6600;
}

.main-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: #1d1d1f;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 22px;
    color: #86868b;
    margin-bottom: 60px;
    font-weight: 400;
}

/* 功能卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.feature-card {
    background: #ffffff;
    border: none;
    border-radius: 24px;
    padding: 40px 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 16px;
    color: #86868b;
    line-height: 1.6;
}

/* 登录区域 */
.login-section {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.login-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 36px;
    font-size: 18px;
    font-weight: 600;
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.login-btn.primary {
    background: linear-gradient(135deg, #FF6600 0%, #ff8533 100%);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(255, 102, 0, 0.3);
}

.login-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(255, 102, 0, 0.4);
}

.login-btn.secondary {
    background: #ffffff;
    color: #1d1d1f;
    border: 2px solid #d2d2d7;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.login-btn.secondary:hover {
    border-color: #FF6600;
    color: #FF6600;
}

/* Dashboard样式 */
.dashboard-body {
    background: #f5f5f7;
}

.dashboard-header {
    background: #ffffff;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.dashboard-header .logo {
    padding: 8px 12px;
}

.dashboard-header .logo-icon {
    font-size: 24px;
}

.dashboard-header .logo-text {
    font-size: 18px;
}

.dashboard-header .user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.dashboard-header .user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #FF6600, #ff8533);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.dashboard-header .user-name {
    font-size: 14px;
    color: #1d1d1f;
    font-weight: 500;
}

.sidebar {
    background: #ffffff;
    padding: 24px 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
}

/* 侧边栏折叠状态 */
.sidebar.collapsed {
    width: 80px;
    padding: 24px 8px;
}

.sidebar.collapsed .sidebar-menu a {
    justify-content: center;
    padding: 14px;
}

.sidebar.collapsed .sidebar-menu a .icon {
    margin: 0;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    font-size: 16px;
    color: #86868b;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(255, 102, 0, 0.1);
    color: #FF6600;
}

/* Dashboard 容器 */
.dashboard-container {
    display: flex;
    min-height: 100vh;
    padding-top: 64px;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    background: #f5f5f7;
    min-height: calc(100vh - 64px);
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 24px;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.breadcrumb-item {
    color: #86868b;
}

.breadcrumb-item.active {
    color: #1d1d1f;
    font-weight: 500;
}

.breadcrumb-separator {
    color: #86868b;
    font-size: 18px;
}

/* ========================================
   增强交互效果
======================================== */

/* 按钮波纹效果 */
.btn, .submit-btn, .login-btn {
    position: relative;
    overflow: hidden;
}

.btn::after, .submit-btn::after, .login-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.btn:active::after, .submit-btn:active::after, .login-btn:active::after {
    width: 300px;
    height: 300px;
}

/* 卡片悬停提升效果增强 */
.stat-card, .content-card, .feature-card, .supplier-card {
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.stat-card:hover, .content-card:hover, .feature-card:hover, .supplier-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* 点击反馈 */
.stat-card:active, .content-card:active, .feature-card:active, .supplier-card:active {
    transform: scale(0.98);
}

/* 输入框焦点效果 */
.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: #FF6600;
    box-shadow: 0 0 0 4px rgba(255, 102, 0, 0.1);
    outline: none;
}

/* 输入框错误状态 */
.form-group input.error, 
.form-group select.error, 
.form-group textarea.error {
    border-color: #ff3b30;
    box-shadow: 0 0 0 4px rgba(255, 59, 48, 0.1);
}

/* 标签页切换动画 */
.page-section {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 数字变化动画 */
.stat-value {
    transition: color 0.3s ease;
}

/* ========================================
   键盘导航支持
======================================== */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid #FF6600;
    outline-offset: 2px;
}

.keyboard-focused {
    outline: 2px solid #FF6600 !important;
    outline-offset: 2px !important;
}

/* 跳过链接（无障碍） */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #FF6600;
    color: white;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-card h4 {
    font-size: 14px;
    color: #86868b;
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .value {
    font-size: 36px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 8px;
}

.stat-card .change {
    font-size: 14px;
    color: #34c759;
    font-weight: 500;
}

/* 内容卡片 */
.content-card {
    background: #ffffff;
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    margin-bottom: 24px;
}

.content-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    font-size: 13px;
    color: #86868b;
    font-weight: 600;
    text-align: left;
    padding: 14px 16px;
    border-bottom: 1px solid #f0f0f0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    font-size: 15px;
    color: #1d1d1f;
    padding: 16px;
    border-bottom: 1px solid #f5f5f7;
}

tr:hover td {
    background: #fafafa;
}

/* ========================================
   响应式设计 - 移动端适配
======================================== */
@media (max-width: 1024px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: 1000;
        transition: left 0.3s ease;
        padding-top: 80px;
        overflow-y: auto;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .sidebar-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: flex !important;
    }
    
    .main-content {
        margin-left: 0 !important;
        padding: 16px !important;
        padding-top: 80px !important;
    }
    
    .dashboard-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 998;
    }
}

@media (max-width: 768px) {
    .main-title {
        font-size: 32px;
    }
    
    .subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .features {
        gap: 16px;
    }
    
    .feature-card {
        padding: 24px 16px;
    }
    
    .feature-card h3 {
        font-size: 18px;
    }
    
    .login-section {
        flex-direction: column;
    }
    
    .login-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: flex-start;
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .stat-value {
        font-size: 28px;
    }
    
    .content-card {
        padding: 20px;
        border-radius: 16px;
    }
    
    /* 表格移动端 */
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 12px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }
    
    table {
        min-width: 600px;
    }
    
    th, td {
        padding: 12px;
        font-size: 14px;
    }
    
    /* 移动端表单 */
    .login-form {
        padding: 24px;
        border-radius: 16px;
    }
    
    .form-group input {
        padding: 14px 16px;
    }
    
    .hero-section {
        padding: 40px 16px;
    }
}

/* 菜单切换按钮 */
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: #ffffff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.menu-toggle:hover {
    background: #f5f5f7;
}

/* 侧边栏遮罩 */
.sidebar-overlay {
    display: none;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

/* 登录表单样式 */
.login-form {
    background: #ffffff;
    padding: 48px;
    border-radius: 24px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
    max-width: 420px;
    width: 100%;
}

.login-form h2 {
    font-size: 28px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 8px;
}

.login-form p {
    color: #86868b;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 16px 20px;
    font-size: 16px;
    border: 2px solid #e5e5e5;
    border-radius: 12px;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-group input:focus {
    border-color: #FF6600;
}

.submit-btn {
    width: 100%;
    padding: 18px;
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, #FF6600 0%, #ff8533 100%);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 102, 0, 0.3);
}

.submit-btn.secondary {
    background: #8e8e93;
}

.submit-btn.secondary:hover {
    background: #636366;
    box-shadow: 0 8px 24px rgba(142, 142, 147, 0.3);
}

/* 页脚 */
footer {
    text-align: center;
    padding: 32px;
    color: #86868b;
    font-size: 14px;
}

/* ========================================
   Toast 提示组件
======================================== */
.toast-container {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    min-width: 280px;
    max-width: 400px;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid #34c759;
}

.toast.error {
    border-left: 4px solid #ff3b30;
}

.toast.warning {
    border-left: 4px solid #ff9500;
}

.toast.info {
    border-left: 4px solid #007aff;
}

.toast-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-size: 15px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 13px;
    color: #86868b;
}

.toast-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: #86868b;
    padding: 4px;
    line-height: 1;
}

.toast-close:hover {
    color: #1d1d1f;
}

/* ========================================
   加载状态组件
======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid #f0f0f0;
    border-top-color: #FF6600;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 15px;
    color: #86868b;
}

/* 按钮加载状态 */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
}

/* 骨架屏动画 */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 8px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

/* ========================================
   空状态提示
======================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 8px;
}

.empty-state-desc {
    font-size: 14px;
    color: #86868b;
    margin-bottom: 24px;
}

.empty-state-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: #FF6600;
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.empty-state-action:hover {
    background: #e65c00;
    transform: translateY(-2px);
}

/* 表格空状态 */
table tbody tr.empty-row {
    background: transparent !important;
}

table tbody tr.empty-row td {
    border: none;
    padding: 40px 20px;
}

/* 加载占位符 */
.skeleton-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 20px;
}

.skeleton-row .skeleton {
    height: 20px;
}

.skeleton-row .skeleton:first-child {
    width: 30%;
}

.skeleton-row .skeleton:nth-child(2) {
    width: 60%;
}