/* 全局样式 */
:root {
    --primary-color: #4a6cf7;
    --secondary-color: #6c757d;
    --accent-color: #ff6b6b;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --border-color: #e9ecef;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
}

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

a:hover {
    color: #3a56d4;
}

ul {
    list-style: none;
}

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

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

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #3a56d4;
    border-color: #3a56d4;
    color: white;
}

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

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #5a6268;
    color: white;
}

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

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

.btn-large {
    padding: 15px 40px;
    font-size: 1.15rem;
    border-radius: 30px;
    box-shadow: 0 5px 15px rgba(74, 108, 247, 0.3);
}

.btn-block {
    display: block;
    width: 100%;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-color);
    max-width: 700px;
    margin: 0 auto;
}

/* 导航栏 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(74, 108, 247, 0.1);
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    align-items: center;
    gap: 8px;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 12px 16px;
    position: relative;
    border-radius: 6px;
    transition: all 0.3s ease;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
    border-radius: 1px;
}

nav ul li a:hover {
    color: var(--primary-color);
    background-color: rgba(74, 108, 247, 0.05);
}

nav ul li a:hover::after {
    width: 80%;
}

nav ul li a.active {
    color: var(--primary-color);
    font-weight: 600;
    background-color: rgba(74, 108, 247, 0.08);
}

nav ul li a.active::after {
    width: 80%;
    background-color: var(--primary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    background-color: rgba(74, 108, 247, 0.1);
    color: var(--primary-color);
}

.mobile-menu-btn.active {
    color: var(--primary-color);
}

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

/* 首页横幅 */
.hero {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ecff 100%);
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(74, 108, 247, 0.1), rgba(74, 108, 247, 0.05));
    z-index: 0;
}

.hero::before {
    top: -100px;
    left: -100px;
}

.hero::after {
    bottom: -100px;
    right: -100px;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 900px;
    width: 100%;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.2rem;
    margin-bottom: 25px;
    color: var(--dark-color);
    line-height: 1.2;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    color: var(--gray-color);
    line-height: 1.8;
    max-width: 90%;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.hero-image {
    flex: 1;
    text-align: center;
}

/* 数据统计 */
.stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a56d4 100%);
    padding: 60px 0;
    color: white;
    position: relative;
}

.stats .container {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.stat-item {
    padding: 0 20px;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

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

/* 功能特点 */
.features {
    padding: 80px 0;
    background-color: #fff;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: #fff;
    border-radius: 15px;
    padding: 35px 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid rgba(74, 108, 247, 0.1);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(74, 108, 247, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 30px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card p {
    color: var(--gray-color);
}

/* 平台介绍 */
.platforms {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    position: relative;
}

/* 价格方案页面 */
.pricing-hero {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8ecff 100%);
    padding: 100px 0 80px;
    min-height: 400px;
    display: flex;
    align-items: center;
}

.pricing-plans {
    padding: 80px 0;
    background-color: #fff;
}

.pricing-tabs {
    display: flex;
    justify-content: center;
    margin: 30px 0;
    gap: 20px;
}

.pricing-tab {
    background-color: #f5f7ff;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.pricing-tab:hover {
    background-color: #e8ecff;
}

.pricing-tab.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

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

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    padding: 40px 30px;
    flex: 1;
    max-width: 350px;
    position: relative;
    transition: all 0.3s ease;
    border: 1px solid rgba(74, 108, 247, 0.1);
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
    z-index: 1;
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.price {
    margin-bottom: 15px;
}

.price .amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price .period {
    font-size: 1rem;
    color: var(--gray-color);
}

.pricing-header p {
    color: var(--gray-color);
    font-size: 1rem;
}

.pricing-features ul {
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    color: var(--dark-color);
}

.pricing-features li i {
    margin-right: 10px;
    color: var(--success-color);
    font-size: 1rem;
}

.pricing-features li.not-included {
    color: var(--gray-color);
    text-decoration: line-through;
    opacity: 0.7;
}

.pricing-features li.not-included i {
    color: var(--danger-color);
}

.pricing-footer {
    margin-top: auto;
}

.platform-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-headers {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.tab-btn {
    padding: 15px 30px;
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

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

.tab-content {
    display: none;
}

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

.platform-info {
    display: flex;
    align-items: center;
    gap: 50px;
}

.platform-image {
    flex: 1;
}

.platform-details {
    flex: 1;
}

.platform-details h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.feature-list {
    margin-bottom: 30px;
}

.feature-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.feature-list li i {
    color: var(--success-color);
    margin-right: 10px;
}

/* 系统优势 */
.advantages {
    padding: 80px 0;
    background-color: #fff;
    position: relative;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    transition: var(--transition);
}

.advantage-item:hover {
    box-shadow: var(--box-shadow);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(74, 108, 247, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.advantage-icon i {
    font-size: 35px;
    color: var(--primary-color);
}

.advantage-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.advantage-item p {
    color: var(--gray-color);
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    position: relative;
}

.contact-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.contact-info {
    display: flex;
    justify-content: center;
    width: 100%;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 0;
    text-align: center;
    flex-direction: column;
    padding: 40px;
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(74, 108, 247, 0.1);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.contact-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(74, 108, 247, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.contact-icon i {
    font-size: 35px;
    color: var(--primary-color);
}

.contact-details h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.contact-details p {
    color: var(--gray-color);
}

.telegram-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.telegram-link:hover {
    color: #0088cc;
    text-decoration: underline;
}

.contact-description {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin-top: 8px;
    font-style: italic;
}

.contact-form {
    flex: 1;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

/* FAQ 部分 */
.faq {
    padding: 80px 0;
    background-color: #fff;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background-color: #f8f9ff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: #e8ecff;
}

.faq-question h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--dark-color);
}

.faq-icon {
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 200px;
}

.faq-answer p {
    margin: 0;
    color: var(--gray-color);
    line-height: 1.6;
}

/* 价格说明部分 */
.pricing-explanation {
    padding: 80px 0;
    background-color: #f8f9ff;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.explanation-card {
    background-color: #fff;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(74, 108, 247, 0.1);
}

.explanation-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.explanation-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(74, 108, 247, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.explanation-icon i {
    font-size: 35px;
    color: var(--primary-color);
}

.explanation-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.explanation-card p {
    color: var(--gray-color);
    line-height: 1.6;
}

/* 演示页面样式 */
.demo-hero {
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ecff 100%);
    padding: 100px 0 80px;
    min-height: 400px;
    display: flex;
    align-items: center;
}

.demo-nav {
    background-color: #fff;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 80px;
    z-index: 999;
}

.demo-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.demo-tab {
    padding: 12px 25px;
    background-color: transparent;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.demo-tab.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.demo-section {
    padding: 80px 0;
    background-color: #fff;
}

.demo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.demo-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.demo-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.2);
}

.demo-image {
    position: relative;
    overflow: hidden;
}

.demo-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.demo-item:hover .demo-image img {
    transform: scale(1.05);
}

.demo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 30px 20px 20px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.demo-item:hover .demo-overlay {
    transform: translateY(0);
}

.demo-overlay h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: white;
}

.demo-overlay p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0;
}

/* 移动端演示 */
.mobile-demo-container {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.mobile-device {
    text-align: center;
    max-width: 200px;
}

.mobile-screen {
    width: 200px;
    height: 350px;
    border: 8px solid #333;
    border-radius: 25px;
    overflow: hidden;
    margin: 0 auto 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

.mobile-screen::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: #333;
    border-radius: 2px;
    z-index: 1;
}

.mobile-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mobile-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--dark-color);
}

/* 演示功能特色 */
.demo-features {
    padding: 80px 0;
    background-color: #f8f9ff;
}

/* CTA 部分 */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3a56d4 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: white;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta-buttons .btn {
    min-width: 200px;
}

/* 演示访问信息样式 */
.demo-access-info {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 30px;
    margin: 30px 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.access-item h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: white;
}

.access-item p {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.9);
}

.demo-link {
    color: #ffd700;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.demo-link:hover {
    color: #ffed4e;
    text-decoration: underline;
}

/* 联系客服部分样式 */
.contact-service {
    padding: 80px 0;
    background-color: #f8f9ff;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background-color: #fff;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(74, 108, 247, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.service-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(74, 108, 247, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.service-icon i {
    font-size: 35px;
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--gray-color);
    margin-bottom: 25px;
    line-height: 1.6;
}

.service-card .btn {
    min-width: 140px;
}

/* 站点地图样式 */
.sitemap-content {
    padding: 80px 0;
    background-color: #f8f9ff;
}

.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 50px;
}

.sitemap-section {
    background-color: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(74, 108, 247, 0.1);
    transition: all 0.3s ease;
}

.sitemap-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(74, 108, 247, 0.15);
    border-color: rgba(74, 108, 247, 0.3);
}

.sitemap-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sitemap-section h2 i {
    font-size: 1.2rem;
}

.sitemap-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sitemap-links li {
    margin-bottom: 12px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(74, 108, 247, 0.1);
}

.sitemap-links li:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.sitemap-links a {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.sitemap-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.sitemap-links a[target="_blank"]::after {
    content: " \f35d";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.8rem;
    margin-left: 5px;
    opacity: 0.7;
}

/* 页脚 */
footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 70px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.footer-logo {
    flex: 1;
    margin-right: 50px;
}

.footer-logo a {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 15px;
    display: inline-block;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.footer-links {
    flex: 2;
    display: flex;
    justify-content: space-between;
}

.footer-links-column {
    margin-right: 30px;
}

.footer-links-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links-column ul li {
    margin-bottom: 10px;
}

.footer-links-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.footer-social {
    flex: 1;
}

.footer-social h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #fff;
}

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

.social-icons a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: var(--transition);
}

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

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid,
    .advantages-grid,
    .explanation-grid,
    .service-grid,
    .sitemap-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .pricing-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-card {
        max-width: 400px;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header .container {
        flex-direction: row;
        justify-content: space-between;
        padding: 15px;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        border-top: 1px solid rgba(74, 108, 247, 0.1);
        padding: 20px;
        z-index: 999;
    }
    
    nav.active {
        display: block;
        animation: slideDown 0.3s ease-out;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    nav ul {
        flex-direction: column;
        gap: 8px;
        margin: 0;
    }
    
    nav ul li {
        margin: 0;
    }
    
    nav ul li a {
        padding: 12px 16px;
        font-size: 1rem;
        display: block;
        text-align: center;
        border-radius: 8px;
    }
    
    .hero {
        padding: 80px 0 60px;
        min-height: 500px;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
        margin-bottom: 20px;
    }
    
    .hero-content p {
        font-size: 1.1rem;
        margin-bottom: 25px;
    }
    
    .stats {
        padding: 50px 0;
    }
    
    .stats .container {
        flex-wrap: wrap;
    }
    
    .stat-item {
        flex: 0 0 50%;
        margin-bottom: 30px;
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
    
    .features,
    .platforms,
    .advantages,
    .contact,
    .pricing-plans,
    .pricing-explanation,
    .faq {
        padding: 60px 0;
    }
    
    .features-grid,
    .advantages-grid,
    .explanation-grid,
    .service-grid,
    .sitemap-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card,
    .advantage-item,
    .explanation-card,
    .service-card,
    .sitemap-section {
        padding: 25px 20px;
    }
    
    .platform-info {
        flex-direction: column;
        gap: 30px;
    }
    
    .platform-image {
        margin-bottom: 0;
    }
    
    .contact-content {
        flex-direction: column;
        gap: 30px;
        min-height: auto;
    }
    
    .contact-item {
        padding: 30px 20px;
        max-width: 400px;
    }
    
    .pricing-tabs {
        flex-direction: column;
        gap: 10px;
    }
    
    .pricing-tab {
        width: 100%;
        text-align: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-logo,
    .footer-links,
    .footer-social {
        margin-bottom: 30px;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .stat-item {
        flex: 0 0 100%;
        margin-bottom: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .feature-card,
    .advantage-item {
        padding: 20px 15px;
    }
    
    .pricing-card {
        padding: 30px 20px;
    }
    
    .contact-form .form-group input,
    .contact-form .form-group textarea {
        padding: 12px;
    }
    
    .footer-links {
        flex-direction: column;
    }
    
    .footer-links-column {
        margin-bottom: 20px;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1.1rem;
    }
    
    /* 演示页面响应式 */
    .demo-tabs {
        flex-direction: column;
        gap: 10px;
    }
    
    .demo-tab {
        width: 100%;
        text-align: center;
    }
    
    .demo-gallery {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .mobile-demo-container {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .mobile-device {
        max-width: 150px;
    }
    
    .mobile-screen {
        width: 150px;
        height: 260px;
    }
}