/* 学考网 - 高中信息技术和通用技术学考网站样式 */

/* 全局样式 */
:root {
    --primary-color: #3aa4e5;
    --primary-dark: #2c8bc4;
    --secondary-color: #4ab4f5;
    --accent-color: #f39c12;
    --success-color: #50c878;
    --text-color: #333;
    --text-light: #666;
    --white: #fff;
    --light-bg: #f8f9fa;
    --shadow: 0 4px 15px rgba(58, 164, 229, 0.15);
    --shadow-hover: 0 8px 25px rgba(58, 164, 229, 0.25);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
}

/* 导航栏 */
.xk-navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.xk-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.xk-logo i {
    margin-right: 10px;
    font-size: 28px;
}

.xk-nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.xk-nav-menu li {
    margin: 0 5px;
}

.xk-nav-menu a {
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    border-radius: 25px;
}

.xk-nav-menu a:hover,
.xk-nav-menu a.active {
    background: var(--primary-color);
    color: var(--white);
}

.xk-nav-actions {
    display: flex;
    gap: 10px;
}

.btn-xk {
    padding: 10px 25px;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-xk-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

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

/* Hero 区域 */
.xk-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.xk-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.xk-hero .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.xk-hero-content {
    text-align: center;
}

.xk-hero-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
    animation: fadeInDown 0.8s ease;
}

.xk-hero-subtitle {
    font-size: 24px;
    margin-bottom: 20px;
    opacity: 0.95;
    animation: fadeInDown 0.8s ease 0.2s backwards;
}

.xk-hero-description {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.9;
    animation: fadeInDown 0.8s ease 0.4s backwards;
}

.xk-hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 50px;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.xk-hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    animation: fadeInUp 0.8s ease 0.8s backwards;
}

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

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

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

/* 特色功能 */
.xk-features {
    padding: 80px 0;
    background: var(--white);
}

.xk-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.xk-section-header h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.xk-section-header p {
    color: var(--text-light);
    font-size: 16px;
}

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

.xk-feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #f0f0f0;
}

.xk-feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.xk-feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 32px;
}

.xk-feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.xk-feature-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}

/* 课程模块 */
.xk-courses {
    padding: 80px 0;
    background: var(--light-bg);
}

.xk-course-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.xk-tab-btn {
    padding: 12px 40px;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.xk-tab-btn:hover,
.xk-tab-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

.xk-course-content {
    display: none;
}

.xk-course-content.active {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.xk-course-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.xk-course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.xk-course-image {
    height: 150px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--white);
}

.xk-course-info {
    padding: 20px;
}

.xk-course-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 12px;
    font-size: 12px;
    margin-bottom: 10px;
}

.xk-course-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.xk-course-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.6;
}

.xk-course-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--text-light);
}

.xk-course-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 练习题库 */
.xk-exercises {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.xk-exercises .xk-section-header h2,
.xk-exercises .xk-section-header p {
    color: var(--white);
}

.xk-exercise-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.xk-category-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.xk-category-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.xk-category-icon {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.xk-category-card h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.xk-category-count {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
    opacity: 0.9;
}

.xk-category-link {
    color: var(--white);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    transition: var(--transition);
}

.xk-category-link:hover {
    gap: 10px;
}

.xk-exercise-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.xk-tag {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.xk-tag:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 模拟考试 */
.xk-mock-exam {
    padding: 80px 0;
    background: var(--white);
}

.xk-mock-exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.xk-mock-card {
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: var(--border-radius);
    padding: 30px;
    transition: var(--transition);
}

.xk-mock-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.xk-mock-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.xk-mock-subject {
    padding: 6px 15px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 15px;
    font-size: 12px;
}

.xk-mock-type {
    padding: 6px 15px;
    background: var(--success-color);
    color: var(--white);
    border-radius: 15px;
    font-size: 12px;
}

.xk-mock-card h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-color);
}

.xk-mock-info {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.xk-mock-info .info-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    color: var(--text-light);
}

.btn-xk-start-exam {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-xk-start-exam:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* 学习资料 */
.xk-resources {
    padding: 80px 0;
    background: var(--light-bg);
}

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

.xk-resource-card {
    background: var(--white);
    padding: 35px 25px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.xk-resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.xk-resource-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 28px;
}

.xk-resource-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.xk-resource-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.btn-xk-download {
    padding: 8px 25px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-xk-download:hover {
    background: var(--primary-dark);
}

/* 关于我们 */
.xk-about {
    padding: 80px 0;
    background: var(--white);
}

.xk-about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.xk-about-text {
    flex: 1;
}

.xk-about-text h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.xk-about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.xk-about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin: 25px 0;
}

.xk-about-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-light);
}

.xk-about-feature i {
    color: var(--success-color);
}

.xk-about-image {
    flex: 1;
}

.xk-stats-wrapper {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.xk-stat-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    color: var(--white);
}

.xk-stat-box h3 {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.xk-stat-box p {
    font-size: 14px;
    opacity: 0.9;
}

/* 页脚 */
.xk-footer {
    background: #2c3e50;
    color: var(--white);
    padding: 60px 0 20px;
}

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

.xk-footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.xk-footer-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.xk-footer-logo i {
    margin-right: 10px;
}

.xk-footer-section p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.8;
    margin-bottom: 20px;
}

.xk-social-links {
    display: flex;
    gap: 15px;
}

.xk-social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.xk-social-links a:hover {
    background: var(--primary-color);
}

.xk-footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.xk-footer-section ul {
    list-style: none;
    padding: 0;
}

.xk-footer-section ul li {
    margin-bottom: 10px;
}

.xk-footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.xk-footer-section ul li a:hover {
    color: var(--white);
}

.xk-footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.xk-footer-bottom p {
    font-size: 14px;
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .xk-nav-menu {
        display: none;
    }
    
    .xk-hero-title {
        font-size: 32px;
    }
    
    .xk-hero-subtitle {
        font-size: 18px;
    }
    
    .xk-hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .xk-hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .xk-about-content {
        flex-direction: column;
    }
    
    .xk-stats-wrapper {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .xk-nav-actions {
        display: none;
    }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}