/**
 * 站长工具箱 - 主样式文件
 * 白色简约风格
 */

/* ==================== CSS 变量 ==================== */
:root {
    /* 主色调 */
    --primary-color: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;

    /* 背景色 - 白色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-tertiary: #eef2f7;
    --bg-card: #ffffff;
    --bg-hover: #f0f4f8;

    /* 文字色 */
    --text-primary: #1a1a1a;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;

    /* 边框色 */
    --border-color: #e2e8f0;
    --border-light: #edf2f7;

    /* 状态色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Consolas', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ==================== 容器 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 头部导航 ==================== */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

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

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 5px;
}

.main-nav>a,
.nav-dropdown>.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.main-nav>a:hover,
.nav-dropdown:hover>.nav-link,
.main-nav>a.active {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-fast);
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-secondary);
    font-size: 13px;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.dropdown-menu a i {
    width: 16px;
    text-align: center;
    color: var(--text-muted);
}

.dropdown-menu a:hover i {
    color: var(--primary-color);
}

/* 大型下拉菜单（4列布局） */
.dropdown-mega {
    display: flex;
    min-width: 700px;
    padding: 15px !important;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
}

.nav-dropdown:hover .dropdown-mega {
    transform: translateX(-50%) translateY(0);
}

.mega-column {
    flex: 1;
    min-width: 160px;
    padding: 0 10px;
    border-right: 1px solid var(--border-light);
}

.mega-column:last-child {
    border-right: none;
}

.mega-column a {
    padding: 8px 10px;
    border-radius: var(--radius-sm);
}

/* HOT 和 NEW 标签 */
.tag-hot,
.tag-new {
    display: inline-block;
    padding: 1px 5px;
    font-size: 10px;
    font-weight: 600;
    border-radius: 3px;
    margin-left: auto;
    text-transform: uppercase;
}

.tag-hot {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
}

.tag-new {
    background: linear-gradient(135deg, #00bcd4, #0097a7);
    color: white;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 5px;
}

/* ==================== 搜索区域（简洁大气风格） ==================== */
.search-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    padding: 80px 0;
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 0 20px;
}

.search-box h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.search-box>p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 35px;
}

.search-form {
    display: flex;
    max-width: 650px;
    margin: 0 auto;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    padding: 6px;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition-fast);
}

.search-form:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 4px 25px rgba(30, 136, 229, 0.15);
}

.search-form input {
    flex: 1;
    min-width: 0;
    border: none;
    padding: 14px 24px;
    font-size: 16px;
    background: transparent;
    color: var(--text-primary);
}

.search-form input::placeholder {
    color: var(--text-light);
}

.search-form input:focus {
    outline: none;
}

.search-form button {
    padding: 14px 35px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-form button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

/* 快捷工具入口 */
.quick-tools {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.quick-tools a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 13px;
    transition: var(--transition-fast);
}

.quick-tools a:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(30, 136, 229, 0.05);
}

.quick-tools a i {
    color: var(--primary-color);
}

/* 保留hero样式以备后用 */
.hero {
    background: var(--gradient-hero);
    padding: 60px 0;
    text-align: center;
    color: white;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-search {
    max-width: 600px;
    margin: 0 auto;
}

.hero-search form {
    display: flex;
    gap: 10px;
    background: white;
    padding: 8px;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
}

.hero-search input {
    flex: 1;
    min-width: 0;
    border: none;
    padding: 12px 20px;
    font-size: 15px;
    background: transparent;
    color: var(--text-primary);
}

.hero-search input::placeholder {
    color: var(--text-muted);
}

.hero-search input:focus {
    outline: none;
}

.hero-search button {
    padding: 12px 30px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.hero-search button:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.4);
}

/* ==================== 工具分类区域 ==================== */
.tools-section {
    padding: 40px 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.section-header i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 工具卡片网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.tool-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: var(--transition-normal);
    cursor: pointer;
}

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

.tool-item-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 15px;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.tool-item:hover .tool-item-icon {
    background: var(--primary-color);
    color: white;
}

.tool-item h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tool-item p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ==================== 特性区域 ==================== */
.features-section {
    padding: 50px 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.features-section h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.8;
    margin-top: 15px;
}

.footer-links h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    padding: 5px 0;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

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

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

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* ==================== 表单样式 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    cursor: pointer;
}

/* ==================== 卡片样式 ==================== */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.card-header .card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
}

.card-header .card-title i {
    color: var(--primary-color);
}

.card-body {
    padding: 20px;
}

/* ==================== 表格样式 ==================== */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
}

.table tr:hover {
    background: var(--bg-hover);
}

/* ==================== 标签样式 ==================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.tag-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.tag-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.tag-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.tag-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

/* ==================== 提示框 ==================== */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
}

.alert i {
    margin-top: 2px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--info-color);
}

/* ==================== Tabs 选项卡 ==================== */
.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.tab-btn {
    padding: 10px 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition-fast);
}

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

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

.tab-content {
    display: none;
}

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

/* ==================== 加载动画 ==================== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== 通知消息 ==================== */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    padding: 14px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

.notification.success {
    border-left: 4px solid var(--success-color);
}

.notification.error {
    border-left: 4px solid var(--danger-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ==================== 代码块 ==================== */
.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-block pre {
    padding: 16px;
    margin: 0;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    overflow-x: auto;
    color: var(--text-primary);
}

code {
    font-family: var(--font-mono);
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--primary-color);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .header .container {
        height: 56px;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        overflow-y: auto;
        z-index: 999;
    }

    .main-nav.active {
        display: flex;
    }

    .main-nav>a,
    .nav-dropdown>.nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: 20px;
        background: transparent;
    }

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

    .hero {
        padding: 40px 0;
    }

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

    .hero-search {
        flex-direction: column;
        border-radius: var(--radius-lg);
        padding: 15px;
    }

    .hero-search button {
        width: 100%;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .tool-item {
        padding: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
}