:root {
    --primary-color: #1C1D21;
    --secondary-color: #5856D6;
    --accent-color: #34C759;
    --text-color: #F2F2F7;
    --light-bg: #23242A;
    --gradient-bg: linear-gradient(135deg, #23242A, #1C1D21);
    --card-shadow: 0 10px 20px rgba(0,0,0,0.6);
    --hover-shadow: 0 15px 30px rgba(0,0,0,0.8);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #1C1D21;
}

header {
    background-color: rgba(28, 29, 33, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.6);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.logo a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.logo a:hover {
    color: var(--secondary-color);
}

.app-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: block;
    object-fit: contain;
    background: transparent;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s;
    font-weight: 500;
}

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

main {
    margin-top: 70px;
}

section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

#hero {
    background: var(--gradient-bg);
    color: white;
    text-align: center;
    padding: 10rem 2rem;
    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>') repeat;
    opacity: 0.1;
}

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

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.95);
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,200,83,0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,200,83,0.4);
}

h1, h2, h3, h4, h5, h6 {
    color: #fff;
}

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

.service-card {
    background: #23242A;
    padding: 3rem 2rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: all 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--hover-shadow);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: 50%;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    margin-top: 1rem;
    text-align: left;
}

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

.service-features li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.contact-container {
    background: white;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 0;
}

.contact-info {
    background: var(--gradient-bg);
    color: white;
    padding: 3rem;
    position: relative;
}

.contact-item {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    font-size: 2rem;
    background: rgba(255,255,255,0.1);
    padding: 1rem;
    border-radius: 50%;
}

.contact-form {
    padding: 3rem;
    background: white;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border: 2px solid var(--light-bg);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,145,234,0.1);
}

.submit-button {
    position: relative;
    overflow: hidden;
    background: var(--gradient-bg);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.submit-button.loading .button-text {
    visibility: hidden;
}

.button-loader {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s infinite linear;
}

.submit-button.loading .button-loader {
    display: block;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

footer {
    background: #23242A;
    color: #aaa;
    padding: 4rem 2rem 2rem;
}

.footer-content {
    padding: 0;
}

.footer-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: flex-end;
}

.footer-links a {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

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

.beian-info {
    margin-top: 1rem;
}

.beian-link {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.beian-link:hover {
    color: white;
}

.beian-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

@media (max-width: 768px) {
    .about-grid,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .menu-toggle {
        display: block;
        cursor: pointer;
    }
    
    .menu-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        background-color: var(--primary-color);
        margin: 5px 0;
        transition: 0.3s;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: 1rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    .nav-links.active a {
        margin: 0.5rem 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 2rem 1rem;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        padding: 2rem;
    }
    
    .contact-form {
        padding: 2rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }

    .app-logo {
        width: 32px;
        height: 32px;
    }
    
    .logo {
        font-size: 1.1rem;
    }
}

/* 添加案例展示相关样式 */
.cases-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.case-card {
    background: #23242A;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.case-image {
    position: relative;
    width: 100%;
    padding-top: 75%;
    overflow: hidden;
}

.case-image img.preview-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img.preview-image {
    transform: scale(1.05);
}

.case-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    z-index: 1;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4CAF50;
    border-radius: 50%;
}

.case-content {
    padding: 1.5rem;
}

.case-content h3 {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    color: #333;
}

.case-description {
    margin: 0 0 1rem;
    color: #666;
    font-size: 0.875rem;
    line-height: 1.5;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: #f0f0f0;
    color: #666;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    transition: all 0.3s ease;
}

.tag:hover {
    background: #e0e0e0;
    color: #333;
}

@media (max-width: 768px) {
    .cases-container {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .case-card {
        max-width: 100%;
    }

    .case-image {
        padding-top: 56.25%; /* 16:9 比例 */
    }

    .case-image img.preview-image {
        object-fit: contain;
        background-color: #f5f5f5;
        padding: 0.5rem;
    }

    .case-content {
        padding: 1rem;
    }

    .case-content h3 {
        font-size: 1.1rem;
    }

    .case-description {
        font-size: 0.8rem;
        margin-bottom: 0.8rem;
    }

    .case-tags {
        gap: 0.4rem;
    }

    .tag {
        padding: 0.2rem 0.6rem;
        font-size: 0.7rem;
    }
}

/* 添加敬请期待相关样式 */
.coming-soon {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.coming-soon-content {
    padding: 2rem;
    animation: fadeIn 1s ease;
}

.coming-soon-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
    animation: sparkle 2s infinite;
}

.coming-soon-content h4 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.coming-soon-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

@keyframes sparkle {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 添加反馈模态框样式 */
.feedback-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.feedback-modal.active {
    display: flex;
}

.feedback-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    animation: modalFadeIn 0.3s ease;
}

.feedback-icon {
    display: block;
    width: 60px;
    height: 60px;
    line-height: 60px;
    font-size: 2rem;
    margin: 0 auto 1rem;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
}

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

.feedback-content p {
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

.close-button {
    background: var(--gradient-bg);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.close-button:hover {
    transform: translateY(-2px);
}

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

/* 添加新的样式来实现App推广页面的现代设计和动画效果 */
.app-hero {
    background: white;
    padding: 8rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content {
    max-width: 500px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #34C759 0%, #5856D6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.hero-description {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.floating-phone {
    max-width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* 功能特点样式 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.feature-card {
    background: #23242A;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

/* 应用预览样式 */
.app-preview {
    background: none;
    padding: 6rem 2rem;
    overflow: hidden;
}

.preview-slider {
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

.preview-track {
    display: flex;
    gap: 2rem;
    padding: 2rem 0;
    animation: scroll 20s linear infinite;
}

.preview-item {
    flex: 0 0 300px;
    height: 600px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-300px * 4 - 2rem * 4)); }
}

/* 下载区域样式 */
.download-section {
    background: none;
    color: white;
    padding: 6rem 2rem;
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.app-store-button {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: black;
    color: white;
    text-decoration: none;
    padding: 0.8rem 2rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.app-store-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.button-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.button-text small {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .app-hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 6rem 1rem;
    }

    .hero-content {
        margin: 0 auto;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .floating-phone {
        max-width: 80%;
    }

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

    .preview-item {
        flex: 0 0 250px;
        height: 500px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: 1rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
    }

    .nav-links a {
        margin: 0.5rem 0;
    }

    .menu-toggle {
        display: block;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 页脚样式 */
footer {
    background: #23242A;
    padding: 4rem 2rem 2rem;
}

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

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

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid rgba(0,0,0,0.1);
    text-align: center;
    color: #666;
}

.beian-link {
    color: #666;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    transition: color 0.3s;
}

.beian-link:hover {
    color: var(--primary-color);
}

.beian-icon {
    width: 16px;
    height: 16px;
}

/* 支持页面样式 */
.support-main {
    padding-top: 80px;
}

.support-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.support-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

/* 联系方式卡片 */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: #23242A;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact-card h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.contact-card p {
    color: #666;
    margin-bottom: 1rem;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.2rem;
    transition: color 0.3s;
}

.contact-link:hover {
    color: var(--secondary-color);
}

/* FAQ样式 */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #23242A;
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.toggle-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

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

/* 反馈表单样式 */
.feedback-form {
    max-width: 600px;
    margin: 0 auto;
    background: #23242A;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #333;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,122,255,0.1);
}

/* 教程样式 */
.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tutorial-card {
    background: #23242A;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
}

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

.tutorial-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-bg);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.tutorial-card h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.tutorial-card ul {
    list-style: none;
    padding: 0;
}

.tutorial-card li {
    padding: 0.5rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
}

.tutorial-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .support-section {
        padding: 3rem 1rem;
    }

    .contact-cards,
    .tutorial-grid {
        grid-template-columns: 1fr;
    }

    .feedback-form {
        padding: 1.5rem;
    }

    .faq-question h3 {
        font-size: 1rem;
    }
}

/* 动画效果 */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.support-section {
    animation: slideDown 0.5s ease;
}

/* 使用指南部分样式 */
.usage-section {
    padding: 4rem 2rem;
    background-color: #23242A;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.usage-card {
    background: #23242A;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    color: #fff;
}

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

.usage-card h3 {
    color: #fff;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.usage-card ul, .usage-card ol {
    padding-left: 1.2rem;
    margin: 0;
    color: #e0e0e0;
}

.usage-card li {
    margin-bottom: 0.5rem;
    color: #e0e0e0;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .usage-grid {
        grid-template-columns: 1fr;
    }
    
    .usage-section {
        padding: 2rem 1rem;
    }
}

::-webkit-scrollbar {
    background: #23242A;
}
::-webkit-scrollbar-thumb {
    background: #333;
}