/**
 * PDFTool - 多邻国清新风格样式
 * 主色调: #58cc02 (绿色)
 */

/* ========== 基础变量 ========== */
:root {
    --primary: #58cc02;
    --primary-dark: #48b000;
    --primary-light: #7ee015;
    --secondary: #1cb0f6;
    --accent: #ff9600;
    --success: #58cc02;
    --warning: #ff9600;
    --error: #ff4b4b;
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-card: #ffffff;
    --text-primary: #3c3c3c;
    --text-secondary: #777777;
    --text-muted: #999999;
    --border-color: #e5e5e5;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* ========== 重置样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ========== 头部导航 ========== */
.pdftool-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo-icon {
    font-size: 28px;
}

.header-nav {
    display: flex;
    gap: 30px;
}

.header-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 8px;
}

.header-nav a:hover {
    color: var(--primary);
    background: rgba(88, 204, 2, 0.08);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.language-selector {
    padding: 6px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: var(--transition);
}

.language-selector:focus {
    border-color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

/* ========== 移动端菜单 ========== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    padding: 10px 0;
    z-index: 999;
}

.mobile-menu.show {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

/* ========== 主内容区 ========== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* ========== Hero区域 ========== */
.hero-section {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #3f7118 0%, #3d7402 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 50px;
    color: white;
}
.hero-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-subtitle {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 30px;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

/* ========== 工具分类区域 ========== */
.tools-section {
    margin-bottom: 60px;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.tool-category {
    margin-bottom: 40px;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-left: 10px;
    border-left: 4px solid var(--primary);
}

.category-title i {
    color: var(--primary);
    font-size: 22px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.tool-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.tool-icon {
    width: 56px;
    height: 56px;
    background: rgba(88, 204, 2, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.tool-icon i {
    font-size: 28px;
    color: var(--primary);
}

.tool-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tool-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========== 特点介绍区域 ========== */
.features-section {
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 页脚 ========== */
.pdftool-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 50px 20px 20px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    font-size: 13px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ========== 响应式设计 ========== */

/* 平板 (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 36px;
    }
    
    .tool-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

/* 手机 (< 768px) */
@media (max-width: 768px) {
    .header-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-section {
        padding: 40px 16px;
        margin-bottom: 30px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .hero-features {
        gap: 12px;
    }
    
    .feature-tag {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .main-content {
        padding: 20px 16px;
    }
    
    .section-header h2 {
        font-size: 22px;
    }
    
    .category-title {
        font-size: 17px;
    }
    
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .tool-card {
        padding: 16px;
    }
    
    .tool-icon {
        width: 44px;
        height: 44px;
        border-radius: 10px;
    }
    
    .tool-icon i {
        font-size: 22px;
    }
    
    .tool-name {
        font-size: 14px;
    }
    
    .tool-desc {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* 小屏手机 (< 480px) */
@media (max-width: 480px) {
    .logo-text {
        font-size: 20px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .tool-card {
        padding: 14px 10px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ========== 工具页面样式 ========== */
.tool-page {
    background: var(--bg-secondary);
    min-height: calc(100vh - 60px);
}

.tool-header {
    background: var(--bg-primary);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.tool-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.tool-header p {
    color: var(--text-secondary);
}

.tool-workspace {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* 上传区域 */
.upload-area {
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(88, 204, 2, 0.02);
}

.upload-icon {
    font-size: 64px;
    color: var(--primary);
    margin-bottom: 20px;
}

.upload-text {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.upload-hint {
    font-size: 13px;
    color: var(--text-muted);
}

.upload-input {
    display: none;
}

/* 文件列表 */
.file-list {
    margin-top: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: 10px;
    box-shadow: var(--shadow);
}

.file-icon {
    width: 40px;
    height: 40px;
    background: rgba(88, 204, 2, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
}

.file-icon i {
    color: var(--primary);
    font-size: 20px;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.file-size {
    font-size: 12px;
    color: var(--text-muted);
}

.file-remove {
    color: var(--error);
    cursor: pointer;
    padding: 8px;
}

/* 进度条 */
.progress-container {
    margin: 30px 0;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 0 var(--primary-dark);
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 var(--primary-dark);
}

.btn-primary:disabled {
    background: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-large {
    padding: 16px 40px;
    font-size: 17px;
}

/* 下载区域 */
.download-area {
    text-align: center;
    padding: 40px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.download-icon {
    font-size: 64px;
    color: var(--success);
    margin-bottom: 20px;
}

.download-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.download-info {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* 选项面板 */
.options-panel {
    background: var(--bg-primary);
    border-radius: var(--radius);
    padding: 24px;
    margin-top: 20px;
    box-shadow: var(--shadow);
}

.options-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.option-item {
    margin-bottom: 16px;
}

.option-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.option-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

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

/* 消息提示 */
.message {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.message-success {
    background: rgba(88, 204, 2, 0.1);
    color: var(--success);
    border: 1px solid rgba(88, 204, 2, 0.3);
}

.message-error {
    background: rgba(255, 75, 75, 0.1);
    color: var(--error);
    border: 1px solid rgba(255, 75, 75, 0.3);
}

.message-warning {
    background: rgba(255, 150, 0, 0.1);
    color: var(--warning);
    border: 1px solid rgba(255, 150, 0, 0.3);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* 隐藏 */
.hidden {
    display: none !important;
}