* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

:root {
    --primary-color: #165DFF;
    --primary-light: #E8F3FF;
    --primary-dark: #0E42C0;
    --success-color: #00B42A;
    --success-light: #E6FFEF;
    --warning-color: #FF7D00;
    --warning-light: #FFF4E5;
    --danger-color: #F53F3F;
    --danger-light: #FFECE8;
    --gray-50: #F9FAFB;
    --gray-100: #F2F3F5;
    --gray-200: #E5E6EB;
    --gray-300: #C9CDD4;
    --gray-400: #86909C;
    --gray-500: #4E5969;
    --gray-600: #272E3B;
    --gray-700: #1D2129;
    --white: #FFFFFF;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --transition: all 0.24s ease;
}

body {
    background-color: var(--gray-50);
    color: var(--gray-700);
    overflow-x: hidden;
    min-height: 100vh;
    line-height: 1.5;
}

#auth-container, #main-container {
    position: relative;
    z-index: 10;
}

/* 星空背景 */
#stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

/* ------------------------------
   登录/注册 企业级样式
------------------------------ */
#auth-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    width: 100%;
    padding: 24px;
}

.auth-form-container {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    width: 100%;
    max-width: 460px;
    box-shadow: var(--glass-shadow);
    border: var(--glass-border);
    margin-top: 10vh;
}

.auth-form-container h2 {
    text-align: center;
    margin-bottom: 36px;
    color: var(--gray-700);
    font-size: 26px;
    font-weight: 600;
    letter-spacing: 0.4px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.auth-form input {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    background-color: var(--white);
    color: var(--gray-700);
    font-size: 15px;
    transition: var(--transition);
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.auth-form button {
    padding: 14px;
    border-radius: var(--radius-md);
    border: none;
    background-color: var(--primary-color);
    color: var(--white);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}

.auth-form button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.auth-toggle {
    text-align: center;
    margin-top: 24px;
    color: var(--gray-400);
    font-size: 14px;
}

.auth-toggle a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    margin-left: 4px;
}

.auth-toggle a:hover {
    text-decoration: underline;
}

.error-message {
    background-color: var(--danger-light);
    color: var(--danger-color);
    padding: 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    text-align: center;
    display: none;
    font-size: 14px;
    border: 1px solid var(--danger-color);
}

/* ------------------------------
   主界面 企业级样式
------------------------------ */
#main-container {
    display: none;
    background-color: var(--gray-50);
    color: var(--gray-700);
    min-height: 100vh;
}

/* 顶部导航 */
.top-nav {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
    border-bottom: 1px solid var(--gray-200);
}

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

.logo h1 {
    color: var(--gray-700);
    font-size: 20px;
    font-weight: 600;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.05);
}

.user-menu {
    position: absolute;
    top: 72px;
    right: 32px;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: 8px 0;
    width: 180px;
    display: none;
    z-index: 101;
    border: 1px solid var(--gray-200);
}

.user-menu.active {
    display: block;
}

.user-menu-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-600);
    font-size: 14px;
    display: flex;
    align-items: center;
}

.user-menu-item:hover {
    background-color: var(--gray-100);
    color: var(--primary-color);
}

.user-menu-item i {
    margin-right: 10px;
    color: var(--gray-400);
    font-size: 16px;
    width: 16px;
    text-align: center;
}

/* 主内容布局 */
.main-content {
    display: flex;
    min-height: calc(100vh - 64px);
}

/* 左侧分类 */
.categories-sidebar {
    width: 280px;
    background-color: var(--white);
    border-right: 1px solid var(--gray-200);
    padding: 24px 0;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
}

.categories-header {
    padding: 0 24px 20px;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 16px;
}

.categories-header h3 {
    color: var(--gray-700);
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.add-category-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.add-category-btn:hover {
    background-color: var(--primary-dark);
}

.categories-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 16px;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 4px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    font-size: 14px;
}

.category-item:hover {
    background-color: var(--gray-100);
}

.category-item.active {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
}

.category-name {
    flex: 1;
    font-size: 16px;
    font-weight: 700;
}

.category-actions {
    display: flex;
    gap: 2px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.category-item:hover .category-actions {
    opacity: 1;
}

.category-action-btn {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.category-action-btn:hover {
    background-color: var(--gray-200);
    color: var(--gray-600);
}

/* 右侧内容区 */
.content-area {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
    height: calc(100vh - 64px);
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    position: sticky;
    top: 0;
    background-color: var(--gray-50);
    padding: 8px 0;
    z-index: 10;
}

.content-header h2 {
    color: var(--gray-700);
    font-size: 22px;
    font-weight: 600;
}

.add-phrase-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.add-phrase-btn:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

/* 话术卡片 */
.phrases-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    padding-right: 4px;
}

.phrases-list::-webkit-scrollbar {
    width: 6px;
}

.phrases-list::-webkit-scrollbar-track {
    background: var(--gray-200);
    border-radius: 3px;
}

.phrases-list::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

.phrase-item {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--gray-200);
    position: relative;
}

.phrase-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-dark);
}

.phrase-content {
    flex: 1;
    font-size: 14px;
    color: var(--gray-600);
    padding-right: 16px;
    word-break: break-word;
}

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

.phrase-btn {
    border: none;
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.copy-btn {
    background-color: var(--success-light);
    color: var(--success-color);
}

.copy-btn:hover {
    background-color: var(--success-color);
    color: var(--white);
}

.edit-btn {
    background-color: var(--warning-light);
    color: var(--warning-color);
}

.edit-btn:hover {
    background-color: var(--warning-color);
    color: var(--white);
}

.delete-btn {
    background-color: var(--danger-light);
    color: var(--danger-color);
}

.delete-btn:hover {
    background-color: var(--danger-color);
    color: var(--white);
}

/* 回收站头部 */
.trash-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.trash-actions {
    display: flex;
    gap: 12px;
}

.empty-trash-btn, .restore-all-btn {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.empty-trash-btn {
    background-color: var(--danger-light);
    color: var(--danger-color);
}

.empty-trash-btn:hover {
    background-color: var(--danger-color);
    color: var(--white);
}

.restore-all-btn {
    background-color: var(--success-light);
    color: var(--success-color);
}

.restore-all-btn:hover {
    background-color: var(--success-color);
    color: var(--white);
}

/* ------------------------------
   模态框 企业级样式
------------------------------ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(2px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 520px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.modal-header {
    padding: 20px 24px;
    background-color: var(--gray-50);
    color: var(--gray-700);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 20px;
    cursor: pointer;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.close-modal:hover {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

.modal-body {
    padding: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray-600);
    font-size: 14px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    font-size: 14px;
    transition: var(--transition);
    background-color: var(--white);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.modal-footer {
    padding: 16px 24px;
    background-color: var(--gray-50);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    border-top: 1px solid var(--gray-200);
}

.modal-btn {
    padding: 8px 20px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.modal-btn.cancel {
    background-color: var(--gray-100);
    color: var(--gray-600);
}

.modal-btn.cancel:hover {
    background-color: var(--gray-200);
}

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

.modal-btn.save:hover {
    background-color: var(--primary-dark);
}

/* 复制提示 */
.copy-notification {
    position: fixed;
    top: 80px;
    right: 32px;
    background-color: var(--success-color);
    color: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 10000;
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-size: 14px;
    font-weight: 500;
}

.copy-notification.show {
    transform: translateX(0);
}

/* 标签页 */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 24px;
}

.tab-btn {
    padding: 14px 24px;
    background: none;
    border: none;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-400);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

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

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px 2px 0 0;
}

.tab-content {
    display: none;
}

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-400);
}

.empty-state i {
    font-size: 60px;
    margin-bottom: 16px;
    color: var(--gray-300);
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--gray-500);
    font-weight: 500;
}

.empty-state p {
    font-size: 14px;
    color: var(--gray-400);
}

/* 头像上传 */
.avatar-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 40px;
    font-weight: 600;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    cursor: pointer;
    position: relative;
    border: 3px solid var(--primary-light);
    transition: var(--transition);
}

.avatar-preview:hover {
    border-color: var(--primary-color);
}

.avatar-preview:hover::after {
    content: '更换头像';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: 500;
}

.avatar-upload-input {
    display: none;
}

.avatar-upload-btn {
    display: block;
    margin: 0 auto 20px;
    padding: 8px 18px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    font-size: 14px;
}

.avatar-upload-btn:hover {
    background-color: var(--primary-dark);
}

/* ------------------------------
   响应式
------------------------------ */
@media (max-width: 992px) {
    .categories-sidebar {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .categories-sidebar {
        width: 100%;
        height: auto;
        position: static;
        padding: 16px 0;
    }
    
    .content-area {
        height: auto;
        padding: 20px;
    }
    
    .categories-list {
        max-height: 200px;
    }
    
    .user-info span {
        display: none;
    }

    .top-nav {
        padding: 16px 20px;
    }
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(22, 93, 255, 0.3);
}

.back-to-top:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
}

.phrase-remark {
    position: absolute;
    top: -1px;
    left: -1px;
    height: 23px;
    min-width: 93px;
    padding: 0 24px 0 14px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #3F8CFF 0%, #1F5EFF 55%, #143BD8 100%);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.3px;
    white-space: nowrap;
    border-radius: 12px 0 24px 0;
    box-shadow: 0 3px 8px rgba(22, 93, 255, 0.22);
    z-index: 10;
    overflow: hidden;
}

.phrase-remark::after {
    content: "";
    position: absolute;
    right: -15px;
    bottom: -12px;
    width: 31px;
    height: 31px;
    background: var(--white);
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(22, 93, 255, 0.18);
}

.phrase-remark::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        120deg,
        rgba(255,255,255,0.28),
        rgba(255,255,255,0.04) 45%,
        transparent 46%
    );
    pointer-events: none;
}

.phrase-item {
    position: relative;
    overflow: visible;
    border: 1px solid var(--primary-color);
    border-left: 1px solid var(--primary-color);
    padding-top: 28px;
}

.auth-form button.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.auth-form button.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

#toast.success { background: #00B42A; }
#toast.error { background: #F53F3F; }
#toast.info { background: #165DFF; }