/* 全局样式 */
:root {
    --primary-color: #4c6ef5;
    --primary-dark: #3b5bdb;
    --secondary-color: #40c057;
    --secondary-dark: #2b9348;
    --dark-color: #212529;
    --dark-gray: #343a40;
    --light-gray: #f8f9fa;
    --medium-gray: #adb5bd;
    --white: #fff;
    --terminal-bg: #2e3440;
    --terminal-text: #d8dee9;
    --font-main: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-code: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px 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: var(--font-main);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

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

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2.5rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

section {
    padding: 5rem 0;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

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

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

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

.btn-download {
    background-color: var(--secondary-color);
    color: var(--white);
    width: 100%;
}

.btn-download:hover {
    background-color: var(--secondary-dark);
    color: var(--white);
}

code {
    font-family: var(--font-code);
    background-color: var(--terminal-bg);
    color: var(--terminal-text);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

.placeholder-img {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    width: 100%;
    height: 100%;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--medium-gray);
    font-weight: 500;
}

/* 导航栏 */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    color: var(--dark-color);
    font-weight: 500;
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--dark-color);
    transition: var(--transition);
}

/* 英雄区 */
.hero {
    padding: 6rem 0 4rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

/* 终端样式 */
.terminal {
    background-color: var(--terminal-bg);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
    overflow: hidden;
}

.terminal-header {
    background-color: #343a40;
    padding: 0.8rem;
    display: flex;
    align-items: center;
}

.terminal-button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.terminal-button:nth-child(1) {
    background-color: #ff5f56;
}

.terminal-button:nth-child(2) {
    background-color: #ffbd2e;
}

.terminal-button:nth-child(3) {
    background-color: #27c93f;
}

.terminal-title {
    margin-left: 10px;
    color: var(--medium-gray);
    font-size: 0.8rem;
}

.terminal-body {
    padding: 1rem;
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--terminal-text);
}

.terminal-body p {
    margin-bottom: 0.5rem;
    white-space: nowrap;
}

.prompt {
    color: #88c0d0;
    margin-right: 0.5rem;
}

.output {
    color: #a3be8c;
}

.cursor {
    display: inline-block;
    background-color: #d8dee9;
    width: 8px;
    height: 1.2em;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    from, to {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
}

/* 特性区域 */
.features {
    background-color: var(--white);
}

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

.feature-card {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: inline-block;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* AI 集成区域 */
.ai-integration {
    background-color: #f8f9fa;
}

.ai-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.ai-text {
    flex: 1;
}

.ai-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.ai-features-list li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

.ai-features-list li:before {
    content: '✓';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.ai-diagram {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* 使用场景 */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.use-case-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

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

.use-case-card p {
    margin-bottom: 1.5rem;
}

.case-example {
    background-color: var(--terminal-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
}

.case-example code {
    background: none;
    padding: 0;
}

/* 文档区域 */
.documentation {
    background-color: var(--white);
}

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

.doc-card {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    display: block;
    color: var(--dark-color);
    box-shadow: var(--box-shadow);
}

.doc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
    color: var(--dark-color);
}

.doc-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.doc-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

/* 下载区域 */
.download {
    background-color: #f8f9fa;
}

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

.download-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
}

.download-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.download-card p {
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
}

.install-command {
    background-color: var(--terminal-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    text-align: left;
    overflow-x: auto;
}

/* 联系我们 */
.contact {
    background-color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.contact-list i {
    margin-right: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.contact-form form {
    display: flex;
    flex-direction: column;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-family: var(--font-main);
    font-size: 1rem;
}

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

/* 页脚 */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.footer-logo span {
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-column h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: var(--light-gray);
}

.footer-column ul li {
    margin-bottom: 0.8rem;
}

.footer-column ul li a {
    color: var(--medium-gray);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--medium-gray);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--white);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .ai-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 2rem;
        transition: var(--transition);
        z-index: 99;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 1.5rem 0;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}