/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 */
:root {
    /* 主题色 */
    --primary-color: #ff2442;
    --primary-light: #ff5a7f;
    --primary-dark: #cc1a35;

    /* 背景色 */
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --secondary-bg: #f1f3f4;

    /* 文字色 */
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-light: #95a5a6;
    --white: #ffffff;

    /* 边框和分割线 */
    --border-color: #e9ecef;
    --border-radius: 16px;
    --border-radius-small: 8px;

    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.25);

    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;

    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #ff2442 0%, #ff5a7f 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-bg: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
}

/* 基础样式 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* 背景装饰 */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(60px);
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-color);
    top: -150px;
    right: -150px;
    animation: float 6s ease-in-out infinite;
}

.circle-2 {
    width: 200px;
    height: 200px;
    background: var(--primary-light);
    bottom: -100px;
    left: -100px;
    animation: float 8s ease-in-out infinite reverse;
}

.circle-3 {
    width: 150px;
    height: 150px;
    background: var(--gradient-secondary);
    top: 50%;
    left: 10%;
    animation: float 7s ease-in-out infinite 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    position: relative;
}

/* 头部 */
.header {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-subtitle {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* 主要内容区 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    min-height: calc(100vh - 160px);
}

/* 欢迎区域 */
.welcome-section {
    margin-bottom: var(--spacing-md);
    animation: slideInUp 0.6s ease-out;
}

.welcome-card {
    background: var(--gradient-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    color: var(--white);
}

.welcome-icon {
    font-size: 2.5rem;
    opacity: 0.9;
}

.welcome-text h2 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
}

.welcome-text p {
    opacity: 0.95;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 主工作区 */
.workspace-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.workspace-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    height: 100%;
    min-height: 600px;
}

/* 上半部分：三列布局 */
.top-section {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

/* 下半部分：生成结果区域 */
.bottom-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* 上半部分卡片样式 - 统一宽度 */
.top-section .input-card {
    grid-column: 1;
    margin-bottom: 0;
    padding: var(--spacing-md);
    width: 100%;
    min-height: 100%;
}

.top-section .settings-card {
    grid-column: 2;
    margin-bottom: 0;
    padding: var(--spacing-md);
    width: 100%;
    min-height: 100%;
}

.top-section .advanced-card {
    grid-column: 3;
    margin-bottom: 0;
    padding: var(--spacing-md);
    width: 100%;
    min-height: 100%;
}

/* 上半部分紧凑样式 */
.top-section .input-group {
    margin-bottom: var(--spacing-md);
}

.top-section .input-group:last-child {
    margin-bottom: 0;
}

.top-section .setting-group {
    margin-bottom: var(--spacing-md);
}

.top-section .setting-group:last-child {
    margin-bottom: 0;
}

/* 结果面板 */
.result-panel {
    display: flex;
    flex-direction: column;
    background: var(--secondary-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    overflow: hidden;
    height: 100%;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.result-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.result-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.clear-all-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.85rem;
}

.clear-all-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 竖版结果容器 */
.waterfall-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    overflow-y: auto;
    padding: var(--spacing-sm);
    align-content: start;
}

.waterfall-container::-webkit-scrollbar {
    width: 8px;
}

.waterfall-container::-webkit-scrollbar-track {
    background: var(--secondary-bg);
    border-radius: 4px;
}

.waterfall-container::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.waterfall-container::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 竖版结果卡片 */
.waterfall-item {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    animation: fadeIn 0.5s ease-out;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.waterfall-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 单个结果卡片 */
.result-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-sm);
    background: var(--secondary-bg);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.result-item-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    flex: 1;
    margin-right: var(--spacing-sm);
}

.result-item-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.result-item-actions .action-btn {
    background: var(--white);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.result-item-actions .action-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.result-item-actions .delete-btn:hover {
    background: #e74c3c;
    border-color: #e74c3c;
}

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-light);
    height: 100%;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.empty-state p {
    margin: var(--spacing-xs) 0;
    font-size: 1rem;
}

/* 批量生成控件 */
.batch-controls {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 高级选项内的批量控件 */
.advanced-group .batch-controls {
    margin-top: var(--spacing-xs);
}

.number-input {
    width: 80px;
    padding: var(--spacing-xs);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    text-align: center;
    transition: border-color var(--transition-fast);
    background: var(--white);
}

/* 高级选项内的数字输入框 */
.advanced-group .number-input {
    width: 100%;
}

.number-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.batch-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-color);
    border: none;
    border-radius: var(--border-radius-small);
    color: var(--white);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    font-weight: 500;
}

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

.batch-toggle-btn.active {
    background: var(--primary-light);
}

.batch-select {
    width: 100px;
    padding: var(--spacing-xs);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    text-align: center;
    transition: border-color var(--transition-fast);
    background: var(--white);
}

.batch-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 一键体验按钮 */
.quick-demo-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: center;
    text-align: center;
}

/* 高级选项内的一键体验按钮 */
.advanced-group .quick-demo-section {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.quick-demo-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: var(--border-radius-small);
    color: var(--white);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    width: auto;
}

.quick-demo-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.quick-demo-btn:hover::before {
    left: 100%;
}

.quick-demo-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quick-demo-btn:active {
    transform: translateY(0);
}

/* 欢迎区域 */
.welcome-section {
    animation: slideInUp 0.6s ease-out;
}

.welcome-card {
    background: var(--gradient-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    color: var(--white);
}

.welcome-icon {
    font-size: 3rem;
    opacity: 0.9;
}

.welcome-text h2 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-xs);
}

.welcome-text p {
    opacity: 0.95;
    font-size: 1rem;
}

/* 卡片基础样式 */
.input-card, .settings-card, .advanced-card, .result-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.input-card:hover, .settings-card:hover, .advanced-card:hover, .result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 输入卡片标题 */
.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.input-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin: 0;
}

.api-settings-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    font-weight: 500;
}

.api-settings-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* 输入区域 */
.input-section {
    animation: slideInUp 0.8s ease-out;
}

.settings-card h3, .advanced-card h3, .result-header h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.input-label i {
    color: var(--primary-color);
}

.input-field, .textarea-field, .select-field {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background: var(--white);
}

.input-field:focus, .textarea-field:focus, .select-field:focus {
    outline: none;
    border-color: var(--primary-color);
}

.textarea-field {
    resize: vertical;
    min-height: 120px; /* 适应新的多输入框布局 */
}

.input-hint {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

/* 设置区域 */
.settings-section {
    animation: slideInUp 1s ease-out;
}

.setting-group {
    margin-bottom: var(--spacing-lg);
}

.setting-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.setting-label i {
    color: var(--primary-color);
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.option-item {
    position: relative;
}

.option-item input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.option-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--white);
}

.option-item input[type="radio"]:checked + .option-label {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
}

.option-icon {
    font-size: 1.2rem;
}

.option-text {
    font-size: 0.9rem;
    font-weight: 500;
}

/* 语气选择器 */
.tone-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.tone-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.tone-item:hover {
    border-color: var(--primary-light);
}

.tone-item.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
}

.tone-emoji {
    font-size: 1.2rem;
}

.tone-name {
    font-size: 0.8rem;
    font-weight: 500;
}

/* 长度选择器 */
.length-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.length-item {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-xs);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    background: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.length-item:hover {
    border-color: var(--primary-light);
}

.length-item.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
}

.length-item.active .length-icon,
.length-item.active .length-name {
    color: var(--white);
}

.length-item.active .length-desc {
    color: rgba(255, 255, 255, 0.9);
    opacity: 1;
}

/* 长度选项标题行 */
.length-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.length-icon {
    font-size: 1.1rem;
    line-height: 1;
}

.length-name {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1;
}

.length-desc {
    font-size: 0.8rem;
    opacity: 0.8;
    line-height: 1;
}

/* 高级选项 */
.advanced-section {
    animation: slideInUp 1.2s ease-out;
}

.advanced-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.advanced-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.advanced-toggle.expanded {
    transform: rotate(180deg);
}

.advanced-content {
    display: grid;
    gap: var(--spacing-md);
}

.advanced-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.advanced-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.advanced-label i {
    color: var(--primary-color);
}

.tag-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-small);
    transition: background-color var(--transition-fast);
}

.checkbox-label:hover {
    background-color: var(--secondary-bg);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    position: relative;
    transition: all var(--transition-fast);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    color: var(--white);
    font-size: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* 生成按钮 */
.generate-section {
    text-align: center;
    animation: slideInUp 1.4s ease-out;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-md);
}

.generate-btn {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: 60px;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
    min-width: 300px;
    min-height: 70px;
    justify-content: center;
}

.generate-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, #ff1744 0%, #ff5a7f 100%);
}

.generate-btn:active {
    transform: translateY(-2px) scale(1.02);
}

.generate-btn i {
    font-size: 1.8rem;
}

.generate-btn span {
    font-size: 1.4rem;
    font-weight: 700;
}

/* 生成按钮发光效果 */
.generate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.8s;
}

.generate-btn:hover::before {
    left: 100%;
}

/* 生成按钮脉冲动画 */
.generate-btn {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: var(--shadow-lg), 0 0 0 8px rgba(255, 36, 66, 0.2);
    }
    100% {
        box-shadow: var(--shadow-lg);
    }
}

/* 结果展示区域 */
.result-section {
    animation: slideInUp 0.6s ease-out;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.result-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.action-btn {
    background: var(--secondary-bg);
    border: none;
    padding: var(--spacing-xs);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

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

.content-display {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    writing-mode: horizontal-tb;
    text-orientation: mixed;
}

.content-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-sm);
    writing-mode: horizontal-tb;
}

.content-body {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
    font-size: 1rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    writing-mode: horizontal-tb;
}

.content-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    writing-mode: horizontal-tb;
}

.tag {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 字数统计 */
.word-count-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-bg);
    border-radius: var(--border-radius-small);
    margin-bottom: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.word-count-icon {
    font-size: 1rem;
}

.word-count-text {
    font-weight: 500;
}

.word-count-value {
    margin-left: auto;
    font-weight: 600;
    color: var(--primary-color);
}

/* 内容分析 */
.content-analysis {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
    margin-bottom: var(--spacing-md);
}

.analysis-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.analysis-item:last-child {
    margin-bottom: 0;
}

.analysis-label {
    font-weight: 500;
    min-width: 100px;
}

.analysis-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.analysis-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.analysis-value {
    margin-left: var(--spacing-xs);
    font-weight: 600;
    color: var(--primary-color);
}

/* 配图建议 */
.image-suggestions {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
}

.image-suggestions h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.suggestion-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.suggestion-item {
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: var(--border-radius-small);
    border-left: 3px solid var(--primary-color);
}

/* 加载状态 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--white);
    font-size: 1.1rem;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: var(--spacing-xl);
}

/* API设置模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1002;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal.show {
    opacity: 1;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: var(--secondary-bg);
}

.modal-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
}

.api-setting-group {
    margin-bottom: var(--spacing-lg);
}

.api-setting-group:last-child {
    margin-bottom: 0;
}

.api-setting-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.api-setting-label i {
    color: var(--primary-color);
}

.api-key-input-group {
    display: flex;
    gap: var(--spacing-xs);
}

.api-key-input {
    flex: 1;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: border-color var(--transition-fast);
}

.api-key-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.api-key-toggle {
    padding: var(--spacing-sm);
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.api-key-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.api-endpoint-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: border-color var(--transition-fast);
}

.api-endpoint-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.api-setting-desc {
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.api-setting-desc a {
    color: var(--primary-color);
    text-decoration: none;
}

.api-setting-desc a:hover {
    text-decoration: underline;
}

.api-info-box {
    background: var(--secondary-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
    border-left: 4px solid var(--primary-color);
}

.api-info-box h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.api-info-box ol {
    padding-left: var(--spacing-md);
}

.api-info-box li {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.modal-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--secondary-bg);
}

.modal-footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.modal-copyright {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.modal-footer-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.modal-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-btn.cancel-btn {
    background: var(--white);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.modal-btn.cancel-btn:hover {
    border-color: var(--text-secondary);
}

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

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

/* Toast提示 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--border-radius-small);
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: transform var(--transition-normal);
    z-index: 1001;
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .top-section {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    .top-section .advanced-card {
        grid-column: 1 / -1;
    }

    .waterfall-container {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 1024px) {
    .container {
        padding: var(--spacing-sm);
    }

    .top-section {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .top-section .input-card,
    .top-section .settings-card,
    .top-section .advanced-card {
        grid-column: 1;
    }

    .logo h1 {
        font-size: 1.8rem;
    }

    .welcome-card {
        flex-direction: column;
        text-align: center;
    }

    .option-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .waterfall-container {
        gap: var(--spacing-sm);
    }

    .result-item-actions {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-xs);
    }

    .logo h1 {
        font-size: 1.6rem;
    }

    .header-subtitle {
        font-size: 1rem;
    }

    /* 欢迎区域移动端优化 */
    .welcome-content {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .welcome-left {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
        text-align: center;
        width: 100%;
        max-width: 100%;
    }

    .welcome-text {
        text-align: center;
        width: 100%;
    }

    .welcome-right {
        position: static;
        transform: none;
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }

    .workspace-layout {
        gap: var(--spacing-sm);
        min-height: auto;
    }

    .top-section {
        padding-bottom: var(--spacing-sm);
    }

    .result-panel {
        min-height: 400px;
    }

    .welcome-card {
        padding: var(--spacing-md);
    }

    .input-card, .settings-card, .advanced-card {
        padding: var(--spacing-md);
    }

    .option-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tone-selector {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xs);
    }

    .tone-item {
        padding: var(--spacing-xs);
    }

    .waterfall-container {
        gap: var(--spacing-sm);
    }

    .batch-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .batch-select {
        width: 100%;
    }

    .modal-content {
        width: 95%;
        max-width: 400px;
    }

    .modal-footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .modal-footer-buttons {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.4rem;
    }

    .logo i {
        font-size: 2rem;
    }

    .welcome-card {
        padding: var(--spacing-sm);
    }

    .input-card, .settings-card, .advanced-card, .result-card {
        padding: var(--spacing-sm);
    }

    .option-grid {
        grid-template-columns: 1fr;
    }

    .length-selector {
        flex-direction: column;
    }

    .length-item {
        margin-bottom: var(--spacing-xs);
    }

    .tone-selector {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xs);
    }

    .tone-item {
        padding: var(--spacing-xs);
    }

    .generate-btn {
        width: 100%;
        justify-content: center;
        min-width: auto;
        font-size: 1.2rem;
        min-height: 60px;
    }

    .generate-btn span {
        font-size: 1.1rem;
    }

    .generate-btn i {
        font-size: 1.4rem;
    }

    .decoration-circle {
        opacity: 0.05;
    }

    .circle-1, .circle-2, .circle-3 {
        width: 150px;
        height: 150px;
    }
}

/* 打印样式 */
@media print {
    .bg-decoration,
    .header,
    .input-section,
    .settings-section,
    .advanced-section,
    .generate-section,
    .result-actions,
    .footer,
    .loading-overlay,
    .toast {
        display: none !important;
    }

    body {
        background: var(--white);
    }

    .container {
        max-width: none;
        padding: 0;
    }

    .result-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* 辅助功能 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .decoration-circle {
        animation: none;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-primary: #000000;
        --card-bg: #ffffff;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --card-bg: #2d2d2d;
        --secondary-bg: #404040;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --text-light: #999999;
        --border-color: #404040;
    }

    .decoration-circle {
        opacity: 0.05;
    }

    .loading-overlay {
        background: rgba(0, 0, 0, 0.9);
    }
}

/* 焦点状态优化 */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 选择文本样式 */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--white);
}