/* CSS 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 头部导航 */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: #4CAF50;
}

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

.nav-item {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-item:hover, .nav-item.active {
    background: #4CAF50;
    color: white;
}

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

.search-container {
    display: flex;
    align-items: center;
}

.search-box {
    display: flex;
    background: #f8f9fa;
    border-radius: 25px;
    overflow: hidden;
    border: 1px solid #e9ecef;
    min-width: 0;
}

.search-box input {
    border: none;
    background: transparent;
    padding: 10px 15px;
    width: 100%;
    min-width: 0;
    outline: none;
    font-size: 14px;
}

.search-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.search-btn:hover {
    background: #45a049;
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.btn-login, .btn-register {
    padding: 8px 16px;
    border: 1px solid #4CAF50;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-login {
    background: transparent;
    color: #4CAF50;
}

.btn-login:hover {
    background: #4CAF50;
    color: white;
}

.btn-register {
    background: #4CAF50;
    color: white;
}

.btn-register:hover {
    background: #45a049;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: all 0.3s ease;
}

/* 页面横幅 */
.page-banner {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    padding: 80px 0;
    color: white;
    text-align: center;
}

.comprehensive-banner {
    background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
}

.strong-foundation-banner {
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
}

.volunteer-banner {
    background: linear-gradient(135deg, #9C27B0 0%, #7B1FA2 100%);
}

.exam-papers-banner {
    background: linear-gradient(135deg, #E91E63 0%, #C2185B 100%);
}

.page-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 20px;
    opacity: 0.9;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    padding: 80px 0;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="80" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="60" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { background-position: 0 0; }
    100% { background-position: 100px 100px; }
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-features {
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 16px;
}

.feature-icon {
    color: #ffeb3b;
    font-weight: bold;
    font-size: 18px;
}

.hero-actions {
    display: flex;
    gap: 15px;
}

.btn-primary, .btn-secondary {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: white;
    color: #4CAF50;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #4CAF50;
}

.hero-image {
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* 服务特色 */
.services {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2c3e50;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #4CAF50, #45a049);
    border-radius: 2px;
}

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

.service-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    border-color: #4CAF50;
}

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

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.service-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-link {
    color: #4CAF50;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.service-link:hover {
    color: #45a049;
}

/* 数据统计 */
.stats {
    padding: 60px 0;
    background: #f8f9fa;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.stat-item {
    text-align: center;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #4CAF50;
    margin-bottom: 10px;
}

.stat-label {
    color: #666;
    font-size: 16px;
}

/* 成功案例 */
.success-cases {
    padding: 80px 0;
    background: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    background: white;
}

.case-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.student-avatar {
    font-size: 48px;
    margin-right: 20px;
}

.student-info h3 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.student-info p {
    color: #666;
    font-size: 14px;
}

.case-content h4 {
    font-size: 16px;
    margin-bottom: 15px;
    color: #4CAF50;
    font-weight: bold;
}

.case-content p {
    color: #666;
    line-height: 1.6;
    font-style: italic;
    margin-bottom: 15px;
}

.case-tags {
    display: flex;
    gap: 8px;
}

.tag {
    background: #4CAF50;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

/* 新闻资讯 */
.news {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.more-link {
    color: #666;
    text-decoration: none;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
}

.more-link:hover {
    color: #4CAF50;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.news-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 25px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.news-category {
    background: #4CAF50;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.news-date {
    color: #999;
    font-size: 12px;
}

.news-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #2c3e50;
}

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

/* 选科测评 */
.selection-test {
    padding: 80px 0;
    background: white;
}

.test-card {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
    background: #f8f9fa;
    padding: 50px;
    border-radius: 20px;
}

.test-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.test-content p {
    font-size: 18px;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.test-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.test-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
}

/* 选科组合分析 */
.combinations {
    padding: 80px 0;
    background: #f8f9fa;
}

.combinations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.combination-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.combination-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.combination-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.combination-header h3 {
    font-size: 20px;
    color: #2c3e50;
}

.popularity {
    background: #4CAF50;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.combination-content h4 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.advantages, .disadvantages {
    margin-bottom: 20px;
}

.advantages ul, .disadvantages ul {
    list-style: none;
    padding-left: 0;
}

.advantages li, .disadvantages li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: #666;
    font-size: 14px;
}

.advantages li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

.disadvantages li::before {
    content: '×';
    position: absolute;
    left: 0;
    color: #f44336;
    font-weight: bold;
}

.suitable-majors {
    margin-top: 20px;
}

.major-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.major-tags .tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

/* 选科工具 */
.selection-tools {
    padding: 80px 0;
    background: white;
}

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

.tool-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: #4CAF50;
    background: white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

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

.tool-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.tool-card p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

.tool-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tool-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
}

/* 选科指南 */
.selection-guide {
    padding: 80px 0;
    background: #f8f9fa;
}

.guide-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}

.guide-steps {
    position: relative;
}

.guide-steps::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #4CAF50;
}

.step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #4CAF50;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin-right: 30px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.step-content p {
    color: #666;
    line-height: 1.6;
}

.guide-tips {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    height: fit-content;
}

.guide-tips h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.guide-tips ul {
    list-style: none;
    padding-left: 0;
}

.guide-tips li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 15px;
    color: #666;
    line-height: 1.6;
}

.guide-tips li::before {
    content: '💡';
    position: absolute;
    left: 0;
    top: 0;
}

/* 综评院校 */
.comprehensive-universities {
    padding: 80px 0;
    background: white;
}

.universities-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.tab-btn {
    padding: 12px 24px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: #4CAF50;
    color: white;
}

.universities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.university-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.university-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.university-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.university-header img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 10px;
    margin-right: 15px;
}

.university-info h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: #2c3e50;
}

.university-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.university-info p {
    color: #666;
    font-size: 14px;
}

.university-details {
    margin-bottom: 20px;
}

.detail-item {
    display: flex;
    margin-bottom: 8px;
    font-size: 14px;
}

.detail-item .label {
    color: #666;
    min-width: 80px;
}

.detail-item .value {
    color: #333;
    font-weight: 500;
}

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

.btn-detail, .btn-apply {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    flex: 1;
}

.btn-detail {
    background: transparent;
    color: #4CAF50;
    border: 1px solid #4CAF50;
}

.btn-detail:hover {
    background: #4CAF50;
    color: white;
}

.btn-apply {
    background: #4CAF50;
    color: white;
}

.btn-apply:hover {
    background: #45a049;
}

/* 综评介绍 */
.comprehensive-intro {
    padding: 80px 0;
    background: white;
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.intro-text p {
    font-size: 18px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
}

.evaluation-formula {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
}

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

.percentage {
    display: block;
    font-size: 32px;
    font-weight: bold;
    color: #4CAF50;
    margin-bottom: 5px;
}

.label {
    font-size: 14px;
    color: #666;
}

.formula-plus {
    font-size: 24px;
    font-weight: bold;
    color: #999;
}

.intro-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

/* 申请流程 */
.application-process {
    padding: 80px 0;
    background: #f8f9fa;
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #4CAF50;
}

.process-step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #4CAF50;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin-right: 30px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.step-content {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    flex: 1;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.step-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 10px;
}

.step-time {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

/* 申请材料 */
.application-materials {
    padding: 80px 0;
    background: white;
}

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

.material-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.material-card:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

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

.material-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.material-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.material-card ul {
    list-style: none;
    padding-left: 0;
    text-align: left;
}

.material-card li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: #666;
    font-size: 14px;
}

.material-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

/* 备考指导 */
.exam-guidance {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.guidance-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    background: white;
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.guidance-panel {
    display: none;
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.guidance-panel.active {
    display: block;
}

.guidance-panel h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #2c3e50;
    text-align: center;
}

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

.guidance-item h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.guidance-item ul {
    list-style: none;
    padding-left: 0;
}

.guidance-item li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: #666;
    line-height: 1.6;
}

.guidance-item li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

/* 强基计划介绍 */
.strong-foundation-intro {
    padding: 80px 0;
    background: white;
}

.plan-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.plan-features .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.plan-features .feature-icon {
    font-size: 24px;
    margin-top: 5px;
}

.plan-features h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.plan-features p {
    color: #666;
    font-size: 14px;
    margin: 0;
}

/* 强基院校 */
.strong-foundation-universities {
    padding: 80px 0;
    background: #f8f9fa;
}

.universities-filter {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 1px solid #4CAF50;
    background: transparent;
    color: #4CAF50;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.filter-btn.active, .filter-btn:hover {
    background: #4CAF50;
    color: white;
}

.university-level {
    background: #ff9800;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 8px;
    display: inline-block;
}

.university-majors {
    margin-bottom: 20px;
}

.university-majors h4 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.university-requirements {
    margin-bottom: 20px;
}

.requirement-item {
    display: flex;
    margin-bottom: 8px;
    font-size: 14px;
}

.requirement-item .label {
    color: #666;
    min-width: 80px;
}

.requirement-item .value {
    color: #333;
    font-weight: 500;
}

/* 报名条件 */
.application-requirements {
    padding: 80px 0;
    background: white;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.requirement-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.requirement-card:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.requirement-icon {
    font-size: 48px;
    margin-bottom: 20px;
    text-align: center;
}

.requirement-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
    text-align: center;
}

.requirement-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
    text-align: center;
}

.requirement-details ul {
    list-style: none;
    padding-left: 0;
}

.requirement-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: #666;
    line-height: 1.6;
}

.requirement-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

/* 选拔流程 */
.selection-process {
    padding: 80px 0;
    background: #f8f9fa;
}

/* 培养模式 */
.training-mode {
    padding: 80px 0;
    background: white;
}

.training-content {
    max-width: 1000px;
    margin: 0 auto;
}

.training-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.feature-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

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

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #2c3e50;
}

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

.training-path {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
}

.training-path h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #2c3e50;
    text-align: center;
}

.path-timeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.path-stage {
    background: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    flex: 1;
    min-width: 200px;
}

.stage-title {
    font-size: 18px;
    font-weight: bold;
    color: #4CAF50;
    margin-bottom: 10px;
}

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

.path-arrow {
    font-size: 24px;
    color: #4CAF50;
    font-weight: bold;
}

/* 志愿填报工具 */
.volunteer-tools {
    padding: 80px 0;
    background: white;
}

.tool-features {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.tool-features span {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

/* 填报策略 */
.volunteer-strategy {
    padding: 80px 0;
    background: #f8f9fa;
}

.strategy-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}

.strategy-principle {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.strategy-principle h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #2c3e50;
    text-align: center;
}

.principle-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.principle-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.principle-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
}

.principle-icon.rush {
    background: #f44336;
}

.principle-icon.stable {
    background: #ff9800;
}

.principle-icon.safe {
    background: #4CAF50;
}

.principle-content h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.principle-content p {
    color: #666;
    font-size: 14px;
    margin-bottom: 5px;
}

.principle-ratio {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.strategy-tips {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    height: fit-content;
}

.strategy-tips h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.tips-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.tip-icon {
    font-size: 18px;
    margin-top: 2px;
}

.tip-item h4 {
    font-size: 14px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.tip-item p {
    color: #666;
    font-size: 12px;
    line-height: 1.4;
    margin: 0;
}

/* 热门院校 */
.popular-universities {
    padding: 80px 0;
    background: white;
}

.universities-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.university-item {
    display: flex;
    align-items: center;
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.university-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.university-logo {
    margin-right: 25px;
}

.university-logo img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
}

.university-info {
    flex: 1;
}

.university-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.university-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.university-info p {
    color: #666;
    margin-bottom: 10px;
}

.admission-data {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: #999;
    flex-wrap: wrap;
}

.university-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-collect {
    padding: 8px 20px;
    border: 1px solid #4CAF50;
    background: transparent;
    color: #4CAF50;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-collect:hover {
    background: #4CAF50;
    color: white;
}

/* 专业推荐 */
.major-recommendation {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.major-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.major-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.major-icon {
    font-size: 48px;
    margin-bottom: 20px;
    text-align: center;
}

.major-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #2c3e50;
    text-align: center;
}

.major-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 15px;
}

.stat-item {
    background: #f8f9fa;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12px;
    color: #666;
}

.major-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
    text-align: center;
}

.major-universities {
    margin-bottom: 20px;
    text-align: center;
    font-size: 14px;
}

.major-universities span:first-child {
    color: #666;
    margin-right: 5px;
}

.major-universities span:last-child {
    color: #4CAF50;
    font-weight: 500;
}

.major-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    width: 100%;
}

.major-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
}

/* 题库页面样式 */
.filter-section {
    padding: 40px 0;
    background: white;
    border-bottom: 1px solid #f0f0f0;
}

.filter-panel {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.filter-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-label {
    font-weight: 500;
    color: #333;
    min-width: 60px;
    margin-right: 15px;
}

.filter-options {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-option {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.filter-option.active, .filter-option:hover {
    background: #4CAF50;
    color: white;
    border-color: #4CAF50;
}

.filter-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.btn-reset, .btn-search {
    padding: 10px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-reset {
    background: #f5f5f5;
    color: #666;
}

.btn-reset:hover {
    background: #e0e0e0;
}

.btn-search {
    background: #4CAF50;
    color: white;
}

.btn-search:hover {
    background: #45a049;
}

/* 试卷列表 */
.papers-section {
    padding: 40px 0 80px;
    background: #f8f9fa;
}

.papers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.papers-count {
    color: #666;
}

.papers-count strong {
    color: #4CAF50;
}

.sort-options {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sort-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: white;
    cursor: pointer;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 30px;
}

.paper-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px 0;
}

.paper-subject {
    background: #4CAF50;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.paper-type {
    background: #e3f2fd;
    color: #1976d2;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.paper-content {
    padding: 20px 25px;
}

.paper-title {
    font-size: 18px;
    margin-bottom: 15px;
    color: #2c3e50;
    line-height: 1.4;
}

.paper-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #666;
    font-size: 12px;
}

.meta-item svg {
    width: 14px;
    height: 14px;
}

.paper-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

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

.stat-label {
    display: block;
    color: #666;
    font-size: 12px;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    color: #333;
    font-weight: 500;
    font-size: 14px;
}

.difficulty-easy {
    color: #4CAF50;
}

.difficulty-medium {
    color: #ff9800;
}

.difficulty-hard {
    color: #f44336;
}

.paper-actions {
    display: flex;
    gap: 10px;
    padding: 0 25px 25px;
}

.btn-preview, .btn-practice, .btn-download {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    flex: 1;
}

.btn-preview {
    background: #f5f5f5;
    color: #666;
}

.btn-preview:hover {
    background: #e0e0e0;
}

.btn-practice {
    background: #2196F3;
    color: white;
}

.btn-practice:hover {
    background: #1976D2;
}

.btn-download {
    background: #4CAF50;
    color: white;
}

.btn-download:hover {
    background: #45a049;
}

/* 分页 */
.pagination-section {
    padding: 40px 0;
    background: #f8f9fa;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.page-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 15px;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.page-btn:hover:not(:disabled) {
    background: #4CAF50;
    color: white;
    border-color: #4CAF50;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-numbers {
    display: flex;
    gap: 5px;
    align-items: center;
}

.page-number {
    width: 40px;
    height: 40px;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-number.active, .page-number:hover {
    background: #4CAF50;
    color: white;
    border-color: #4CAF50;
}

.page-ellipsis {
    color: #999;
    padding: 0 10px;
}

.pagination-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    color: #666;
    font-size: 14px;
}

.page-size-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-size-selector select {
    padding: 5px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
    cursor: pointer;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    color: #4CAF50;
    margin-bottom: 20px;
    font-size: 18px;
}

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

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

.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #4CAF50;
}

.social-links {
    display: flex;
    justify-content: center;
}

.qr-code {
    text-align: center;
}

.qr-code img {
    width: 80px;
    height: 80px;
    background: white;
    padding: 5px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.qr-code p {
    font-size: 12px;
    color: #bdc3c7;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: #95a5a6;
}

/* 登录注册弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    animation: slideIn 0.3s ease;
}

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

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid #f0f0f0;
}

.modal-header h2 {
    color: #2c3e50;
    font-size: 24px;
    margin: 0;
}

.close {
    color: #999;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #333;
}

.modal-body {
    padding: 30px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: #333;
    font-weight: 500;
    font-size: 14px;
}

.form-group input {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #4CAF50;
}

.verification-input {
    display: flex;
    gap: 10px;
}

.verification-input input {
    flex: 1;
}

.btn-verification {
    padding: 12px 20px;
    background: #f5f5f5;
    color: #666;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
    transition: all 0.3s ease;
}

.btn-verification:hover {
    background: #e0e0e0;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox input {
    margin: 0;
}

.forgot-password {
    color: #4CAF50;
    text-decoration: none;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #45a049;
}

.btn-submit {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.auth-switch {
    text-align: center;
    color: #666;
    font-size: 14px;
}

.switch-to-register, .switch-to-login {
    color: #4CAF50;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.switch-to-register:hover, .switch-to-login:hover {
    color: #45a049;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .search-container {
        width: 100%;
        max-width: 200px;
    }
    
    .search-box {
        width: 100%;
    }
    
    .search-box input {
        min-width: 100px;
        width: 100%;
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: 5px;
    }
    
    .btn-login, .btn-register {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .page-title {
        font-size: 32px;
    }
    
    .page-subtitle {
        font-size: 16px;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .test-card {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 30px;
    }
    
    .combinations-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .guide-steps::before {
        display: none;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .step-number {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .universities-tabs {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .tab-btn {
        padding: 8px 16px;
        font-size: 14px;
    }
    
    .university-item {
        flex-direction: column;
        text-align: center;
    }
    
    .university-logo {
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    .admission-data {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .university-actions {
        flex-direction: row;
        justify-content: center;
    }
    
    .strategy-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .principle-grid {
        gap: 15px;
    }
    
    .principle-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .path-timeline {
        flex-direction: column;
        gap: 15px;
    }
    
    .path-arrow {
        transform: rotate(90deg);
    }
    
    .filter-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .filter-label {
        margin-right: 0;
        margin-bottom: 5px;
    }
    
    .papers-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .papers-grid {
        grid-template-columns: 1fr;
    }
    
    .pagination {
        flex-wrap: wrap;
        gap: 5px;
    }
    
    .pagination-info {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .search-container {
        max-width: 150px;
    }
    
    .search-box input {
        min-width: 80px;
        padding: 8px 12px;
    }
    
    .search-btn {
        padding: 8px 10px;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: 10px;
        align-items: flex-end;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .training-features {
        grid-template-columns: 1fr;
    }
    
    .majors-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #4CAF50;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #45a049;
}

/* 动画 */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

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