/* 全局变量 */
:root {
    --primary-color: #1a237e;
    --secondary-color: #0d47a1;
    --accent-color: #ffd700;
    --text-light: #ffffff;
    --text-dark: #333333;
    --transition: all 0.3s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    --bg-light: #f8f9fa;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #f8f9fa;
}

/* 导航栏 */
.main-nav {
    background: transparent;
    padding: 1.5rem 5%;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.main-nav.scrolled {
    background: rgba(26, 35, 126, 0.95);
    padding: 1rem 5%;
    box-shadow: var(--box-shadow);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    height: 45px;
    width: auto;
    display: block;
    filter: brightness(0) invert(1);
}

.nav-text {
    font-size: 1.25rem;
    font-weight: 500;
    color: #fff;
    line-height: 45px;
    white-space: nowrap;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .nav-text {
        display: none;
    }
    
    .nav-logo {
        height: 35px;
    }
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent-color);
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    padding-top: 60px;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    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="50" cy="50" r="40" fill="rgba(255,255,255,0.1)"/></svg>') center/cover;
    opacity: 0.1;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-light);
    padding: 2rem 5%;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* Banner增强 */
.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin: 2rem 0;
}

.hero-features span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-features i {
    color: var(--accent-color);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
}

.hero-stats .stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem 2rem;
    border-radius: 15px;
}

.hero-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    display: block;
}

.hero-stats .stat-label {
    font-size: 1rem;
    color: var(--text-color);
    margin-top: 0.5rem;
}

.hero-trust {
    text-align: center;
    margin: 2rem 0;
}

.trust-label {
    color: var(--text-light);
    margin-right: 1rem;
}

.trust-logos {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.trust-logos i {
    color: var(--accent-color);
    font-size: 1.5rem;
}

/* 按钮样式调整 */
.btn {
    display: inline-block;
    padding: 1.2rem 4rem;
    font-size: 1.4rem;
    font-weight: 500;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    margin: 0 1.5rem;
    cursor: pointer;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid white;
    backdrop-filter: blur(5px);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .btn {
        padding: 1rem 3rem;
        font-size: 1.2rem;
        margin: 0.8rem;
    }

    .hero-buttons {
        margin-top: 3rem;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.9rem 2.5rem;
        font-size: 1.1rem;
        margin: 0.5rem;
        width: 80%;
    }

    .hero-buttons {
        flex-direction: column;
        margin-top: 2rem;
    }
}

/* 主要内容区域 */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

/* 特性卡片 */
.section-features {
    padding: 4rem 0;
    background: white;
}

.section-features .container,
.section-advantages .container,
.section-testimonials .container,
.section-faq .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h3 {
    color: var(--primary-color);
    margin: 1rem 0;
    font-size: 1.25rem;
}

.feature-item p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 对比表格 */
.comparison-table {
    overflow-x: auto;
    margin: 2rem 0;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.comparison-table th,
.comparison-table td {
    padding: 1.5rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.comparison-table th {
    background: var(--primary-color);
    color: var(--text-light);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.text-success {
    color: #28a745;
}

.text-danger {
    color: #dc3545;
}

/* 流程时间线 */
.process-timeline {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    margin: 4rem 0;
    position: relative;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

/* 核心优势 */
.section-advantages {
    padding: 4rem 0;
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin: 4rem 0;
}

.advantage-item {
    background: white;
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

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

.advantage-item h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.advantage-item i {
    font-size: 1.8rem;
    color: var(--accent-color);
}

.advantage-item p {
    color: var(--text-dark);
    opacity: 0.9;
}

/* 用户评价 */
.section-testimonials {
    padding: 4rem 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin: 4rem 0;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.testimonial-header i {
    font-size: 3rem;
    color: var(--primary-color);
}

.testimonial-info h3 {
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

.testimonial-info p {
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* FAQ部分 */
.section-faq {
    background: var(--bg-light);
    padding: 4rem 0;
}

.faq-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.faq-text h3 {
    color: var(--primary-color);
    margin: 2rem 0 1rem;
    font-size: 1.25rem;
}

.faq-text p {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.faq-tips {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.faq-tips li {
    padding: 0.5rem 0;
    color: var(--text-color);
    position: relative;
    padding-left: 1.5rem;
}

.faq-tips li:before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* 常见问题区块 */
.section-questions {
    padding: 4rem 0;
    background: var(--bg-light);
}

.questions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.question-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease;
}

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

.question-item h3 {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    padding-left: 2rem;
}

.question-item h3:before {
    content: "Q";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.question-item p {
    color: var(--text-color);
    line-height: 1.6;
    position: relative;
    padding-left: 2rem;
}

.question-item p:before {
    content: "A";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

@media (max-width: 992px) {
    .questions-grid {
        grid-template-columns: 1fr;
    }
}

/* 页脚 */
.main-footer {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 4rem 5%;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 2rem;
    transition: var(--transition);
}

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


/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .main-nav {
        padding: 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .process-timeline {
        flex-direction: column;
    }
    
    .process-step {
        margin-bottom: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links a {
        margin: 0 1rem;
    }
    
    .comparison-table {
        margin: 1rem -1rem;
    }
}

@media print {
    .main-nav,
    .hero-buttons,
    #back-to-top,
    .footer-links {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
}

/* 关于部分 */
.section-about {
    padding: 4rem 0;
    background: var(--bg-gradient);
}

.about-content {
    margin: 0 auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.about-text {
    text-align: center;
}

.about-text h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.about-feature:hover {
    transform: translateY(-3px);
}

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

.about-feature span {
    color: var(--text-color);
    font-size: 1rem;
}

.about-highlights {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
}

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

.highlight-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.highlight-text {
    color: var(--text-color);
    font-size: 1rem;
}

@media (max-width: 768px) {
    .about-features {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        flex-direction: column;
        gap: 2rem;
    }
}

/* 查重流程 */
.section-process {
    padding: 4rem 0;
    background: white;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.process-step {
    text-align: center;
    padding: 2rem;
    position: relative;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* 数据统计 */
.section-stats {
    padding: 4rem 0;
    background: var(--bg-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.stat-item {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 1rem 0;
}

/* 期刊覆盖 */
.section-journals {
    padding: 4rem 0;
    background: white;
}

.journals-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin: 4rem 0;
}

.journals-list {
    list-style: none;
    padding: 0;
}

.journals-list li {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.journals-list i {
    color: var(--primary-color);
}

.chart-container {
    padding: 2rem;
}

.chart-bar {
    height: 40px;
    background: #e9ecef;
    margin: 1rem 0;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.chart-bar::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: var(--percent);
    background: var(--primary-color);
    border-radius: 20px;
}

.chart-label {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    z-index: 1;
}

.chart-value {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
}

.coverage-item {
    position: relative;
    z-index: 1;
}

.coverage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-light);
    opacity: 0.9;
    z-index: -1;
    border-radius: 10px;
}

.coverage-item h3 {
    margin: 0;
    color: var(--primary-color);
}

.coverage-item .percentage {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.coverage-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.coverage-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.coverage-label {
    display: flex;
    justify-content: space-between;
    font-weight: 500;
    color: var(--text-color);
}

.progress-bar {
    width: 100%;
    height: 24px;
    background: #f0f0f0;
    border-radius: 12px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--primary-color);
    border-radius: 12px;
    transition: width 0.3s ease;
}

/* 价格方案 */
.section-pricing {
    padding: 4rem 0;
    background: var(--bg-light);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.pricing-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.pricing-header {
    margin-bottom: 2rem;
}

.price {
    margin: 1rem 0;
}

.amount {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
}

.unit {
    color: #6c757d;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.pricing-features li {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pricing-features i {
    color: var(--primary-color);
}

.premium {
    position: relative;
    border: 2px solid var(--primary-color);
}

.premium::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
}

/* 使用方法 */
.section-usage {
    padding: 4rem 0;
    background: white;
}

.usage-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    margin: 4rem 0;
}

.usage-step {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 10px;
    transition: var(--transition);
}

.usage-step:hover {
    transform: translateX(10px);
    box-shadow: var(--box-shadow);
}

.usage-step h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.video-container {
    background: var(--bg-light);
    height: 100%;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.video-container:hover {
    background: var(--primary-color);
    color: white;
}

.video-container i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

/* 查重原理 */
.section-principle {
    padding: 2rem 0;
    background: var(--bg-light);
}

.principle-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.principle-text {
    display: grid;
    gap: 1.5rem;
}

.principle-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.principle-item h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.principle-item p {
    margin: 0;
    line-height: 1.5;
}

.principle-chart {
    height: 100%;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.principle-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 温馨提示 */
.section-tips {
    padding: 4rem 0;
    background: white;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.tip-card {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 10px;
    text-align: center;
}

.tip-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tip-card ul {
    list-style: none;
    padding: 0;
    text-align: left;
    margin-top: 1rem;
}

.tip-card li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.tip-card li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* 合作伙伴 */
.section-partners {
    padding: 4rem 0;
    background: var(--bg-light);
}

.partners-grid {
    margin: 4rem 0;
}

.partner-category {
    margin-bottom: 3rem;
}

.partner-category h3 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.partner-logos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

@media (max-width: 1200px) {
    .partner-logos {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .partner-logos {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.partner-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease;
    min-width: 200px;
}

.partner-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: block;
}

.partner-logo {
    font-size: 1.1rem;
    line-height: 1.4;
}

.partners-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid #eee;
}

.partners-list li:last-child {
    border-bottom: none;
}

.partners-list i {
    font-size: 1.25rem;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
}

.partners-list span {
    font-size: 1rem;
    color: var(--text-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .usage-grid,
    .principle-content {
        grid-template-columns: 1fr;
    }
}

/* 查重原理详细信息 */
.principle-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.principle-table {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.principle-table h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.principle-table table {
    width: 100%;
    border-collapse: collapse;
}

.principle-table th,
.principle-table td {
    padding: 0.75rem;
    text-align: center;
    border: 1px solid #eee;
}

.principle-table th {
    background: #f8f9fa;
    color: var(--primary-color);
}

.principle-chart-pie {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.principle-chart-pie h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.pie-legend {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.color-box {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.color-box.grad1 {
    background: linear-gradient(to right, #4a90e2, #357abd);
}

.color-box.grad2 {
    background: linear-gradient(to right, #5cb85c, #449d44);
}

.color-box.grad3 {
    background: linear-gradient(to right, #f0ad4e, #ec971f);
}

.hero-content {
    text-align: center;
    padding: 4rem 0;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-color);
    margin: 1rem 0;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-color);
}

@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
}

/* 数据统计区块 */
.section-stats {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 3rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 期刊覆盖区块 */
.section-journals {
    background: var(--bg-light);
    padding: 4rem 0;
}

.journals-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.journal-category {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.journal-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.journal-category ul {
    list-style: none;
    padding: 0;
}

.journal-category li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

/* 对比分析表格 */
.comparison-table {
    margin-top: 2rem;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: var(--box-shadow);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid #eee;
}

.comparison-table th {
    background: var(--primary-color);
    color: white;
}

.comparison-table tr:nth-child(even) {
    background: var(--bg-light);
}

/* 用户体验区块 */
.section-testimonials {
    padding: 4rem 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-item {
    display: flex;
    gap: 1.5rem;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.testimonial-avatar {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.testimonial-content {
    flex: 1;
}

.testimonial-text {
    margin-bottom: 1rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

/* 学科领域区块 */
.section-fields {
    background: var(--bg-light);
    padding: 4rem 0;
}

.fields-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.field-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.field-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.field-item h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .stats-grid,
    .journals-grid,
    .fields-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .stats-grid,
    .journals-grid,
    .fields-grid {
        grid-template-columns: 1fr;
    }
}

/* SEO优化相关样式 */
.breadcrumb {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem 2rem;
    border-radius: 5px;
    margin: 1rem auto;
    max-width: var(--container-width);
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: var(--accent-color);
}

.breadcrumb-separator {
    margin: 0 0.5rem;
    opacity: 0.7;
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.tag:hover {
    background: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
}

/* 页脚优化 */
.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
    position: relative;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent-color);
}

.footer-section ul li {
    margin-bottom: 0.8rem;
    transition: transform 0.3s;
}

.footer-section ul li:hover {
    transform: translateX(5px);
}

.footer-section ul a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
    font-size: 0.95rem;
    display: inline-block;
}

.footer-section ul a:hover {
    color: #fff;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .breadcrumb {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }
    
    .footer-section h3 {
        font-size: 1.1rem;
        margin-bottom: 1.2rem;
    }
    
    .footer-section ul a {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .tag-cloud {
        gap: 0.3rem;
    }
    
    .tag {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .footer-section h3::after {
        width: 25px;
    }
}

/* 专题页面通用样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* 使用教程页面样式 */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.step-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    position: relative;
    transition: var(--transition);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* 评价分析页面样式 */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.review-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-rating {
    color: var(--accent-color);
    margin-top: 1rem;
}

/* 报告解读页面样式 */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.analysis-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.analysis-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 技术原理页面样式 */
.principle-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.principle-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

/* 价格页面样式 */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.pricing-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--accent-color);
}

.price {
    font-size: 3rem;
    color: var(--primary-color);
    margin: 1.5rem 0;
}

.price .unit {
    font-size: 1rem;
    color: var(--text-dark);
}

/* 入口导航页面样式 */
.access-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.access-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.access-card.primary {
    background: var(--gradient-primary);
    color: white;
}

.access-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.access-card.primary .access-icon {
    color: white;
}

/* 产品对比页面样式 */
.comparison-table {
    overflow-x: auto;
    margin: 2rem 0;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: var(--box-shadow);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid #eee;
}

.comparison-table th {
    background: var(--primary-color);
    color: white;
}

.comparison-table tr:nth-child(even) {
    background: var(--bg-light);
}

/* 性能对比图表样式 */
.performance-chart {
    margin: 2rem 0;
}

.chart-bar {
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 20px;
    margin: 1rem 0;
    position: relative;
    color: white;
    display: flex;
    align-items: center;
    padding-left: 1rem;
}

.chart-bar.other {
    background: #ddd;
    color: var(--text-dark);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .pricing-card.featured {
        transform: none;
    }
    
    .comparison-table {
        font-size: 0.9rem;
    }
    
    .chart-bar {
        height: 30px;
        font-size: 0.9rem;
    }
}

/* 基础容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 通用section样式 */
section {
    padding: 5rem 0;
    background: var(--bg-light);
}

section:nth-child(even) {
    background: white;
}

/* 通用网格布局 */
.grid {
    display: grid;
    gap: 2rem;
}

/* 服务版块样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.service-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

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

.service-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 指南版块样式 */
.guide-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.guide-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

.guide-steps {
    list-style-position: inside;
    padding: 1rem 0;
}

/* 优势版块样式 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.advantage-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.advantage-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 特性版块样式 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* 支持版块样式 */
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.support-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

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

.support-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* FAQ版块样式 */
.faq-grid {
    display: grid;
    gap: 1.5rem;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

/* 结论版块样式 */
.conclusion-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.conclusion-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

/* 按钮样式增强 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    text-align: center;
}

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

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

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

/* 列表样式增强 */
ul {
    list-style: none;
}

ul li {
    margin-bottom: 0.5rem;
}

ul li i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

/* 表格样式增强 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    box-shadow: var(--box-shadow);
}

th, td {
    padding: 1rem;
    text-align: left;
    border: 1px solid #eee;
}

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

tr:nth-child(even) {
    background: var(--bg-light);
}

/* 响应式调整补充 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 图标样式统一 */
.fas, .far, .fab {
    display: inline-block;
    vertical-align: middle;
}

/* 阴影效果统一 */
.shadow {
    box-shadow: var(--box-shadow);
}

/* 圆角统一 */
.rounded {
    border-radius: 15px;
}

.main-footer a {
    color: var(--text-light);
}

.breadcrumb {
 
    background-color: #fff;
    border-bottom: 1px solid #eee;
    font-size: 0.9rem;
    color: #666;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}