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

:root {
    --primary-color: #0078d4;
    --primary-hover: #106ebe;
    --primary-light: #deecf9;
    --success-color: #107c10;
    --warning-color: #ffc107;
    --error-color: #d13438;
    --text-primary: #323130;
    --text-secondary: #605e5c;
    --text-disabled: #a19f9d;
    --bg-primary: #ffffff;
    --bg-secondary: #faf9f8;
    --bg-tertiary: #f3f2f1;
    --border-color: #e1dfdd;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --transition: all 0.2s ease;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
}

/* ===== 页面容器 ===== */
.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 头部 ===== */
.header {
    padding: 16px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 32px;
    height: 32px;
}

.logo svg {
    width: 100%;
    height: 100%;
}

.brand-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== 主内容区 ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 40px 24px;
}

/* ===== 认证容器 ===== */
.auth-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-box {
    width: 100%;
    max-width: 440px;
    background: var(--bg-primary);
    padding: 44px;
    box-shadow: var(--shadow-lg);
}

.auth-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.auth-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ===== 表单样式 ===== */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    position: relative;
}

.form-input {
    width: 100%;
    height: 48px;
    padding: 12px 40px 12px 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    font-size: 15px;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--primary-color);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: -8px;
    left: 8px;
    font-size: 12px;
    background: var(--bg-primary);
    padding: 0 4px;
    color: var(--primary-color);
}

.form-label {
    position: absolute;
    left: 12px;
    top: 14px;
    font-size: 15px;
    color: var(--text-secondary);
    pointer-events: none;
    transition: var(--transition);
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-secondary);
}

.toggle-password svg {
    width: 20px;
    height: 20px;
}

.toggle-password:hover {
    color: var(--primary-color);
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 40px;
    padding: 0 24px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-primary:disabled {
    background: var(--text-disabled);
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
}

.btn-secondary:disabled {
    color: var(--text-disabled);
    cursor: not-allowed;
}

/* ===== 表单选项 ===== */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.forgot-link {
    font-size: 13px;
    color: var(--primary-color);
    text-decoration: none;
}

.forgot-link:hover {
    text-decoration: underline;
}

/* ===== 链接样式 ===== */
.link {
    color: var(--primary-color);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* ===== 认证页脚 ===== */
.auth-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 页面底部 ===== */
.footer {
    padding: 16px 24px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.footer-copyright {
    color: var(--text-disabled);
    margin-left: auto;
}

/* ===== 加载动画 ===== */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== 提示消息 ===== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    min-width: 300px;
}

.toast.success .toast-content {
    border-left-color: var(--success-color);
}

.toast.error .toast-content {
    border-left-color: var(--error-color);
}

.toast.warning .toast-content {
    border-left-color: var(--warning-color);
}

/* Beta页面专用样式 */

/* 头部用户区域 */
.header-user {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

.header-user span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Beta容器 */
.beta-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    width: 100%;
}

/* 标签导航 */
.tab-nav {
    display: flex;
    gap: 4px;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    padding: 12px 24px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--bg-primary);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

/* 标签面板 */
.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* 新闻列表 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-lg);
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.news-meta {
    font-size: 12px;
    color: var(--text-disabled);
    margin-bottom: 12px;
}

.news-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: pre-wrap;
}

/* 软件列表 */
.software-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.software-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-lg);
}

.software-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.software-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.software-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.software-instructions {
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
}

.software-notes {
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 12px;
}

.software-meta {
    font-size: 12px;
    color: var(--text-disabled);
}

.download-result {
    margin-top: 12px;
}

.download-link {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary-light);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    word-break: break-all;
}

.download-link:hover {
    background: var(--primary-color);
    color: white;
}

/* 加载和空状态 */
.loading,
.empty,
.error {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

.error {
    color: var(--error-color);
}

/* 用户头部 */
.header .header-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header .header-user span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 响应式 */
@media (max-width: 768px) {
    .beta-container {
        padding: 16px;
    }
    
    .tab-nav {
        flex-direction: column;
    }
    
    .software-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .software-header .btn {
        width: 100%;
    }
}