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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    margin: 0;
}

.slogan {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-desc {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

/* 搜索区域 */
.search-section {
    background: white;
    padding: 60px 0;
}

.search-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    color: #333;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 10px;
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 30px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.search-box input:focus {
    border-color: #667eea;
}

.search-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.search-btn:hover {
    background: #5568d3;
}

.search-results {
    max-width: 600px;
    margin: 20px auto 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    display: none;
}

/* 工具区域 */
.tools-section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: #333;
}

.tool-category {
    margin-bottom: 60px;
}

.category-title {
    font-size: 28px;
    margin-bottom: 30px;
    color: #667eea;
    padding-left: 15px;
    border-left: 4px solid #667eea;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.tool-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.tool-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.tool-card h4 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #333;
}

.tool-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 功能介绍 */
.features-section {
    background: white;
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 关于我们 */
.about-section {
    padding: 80px 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h3 {
    font-size: 24px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #667eea;
}

.about-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 15px;
    color: #555;
}

.about-content ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.about-content li {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer p {
    margin-bottom: 10px;
}

.footer-desc {
    font-size: 14px;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        gap: 20px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 28px;
    }

    .section-title {
        font-size: 28px;
    }

    .category-title {
        font-size: 22px;
    }

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

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

    .search-box {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
    }
}


/* 工具页 iframe 容器 */
.tool-container{max-width:1200px;margin:20px auto;padding:10px}
.tool-frame{width:100%;height:78vh;border:0;border-radius:12px;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.08)}
@media (max-width: 768px){
  .tool-frame{height: calc(100vh - 220px);} /* 适配移动端高度 */
}