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

:root {
    --primary-color: #0a192f;
    --secondary-color: #64ffda;
    --accent-color: #30a2ff;
    --light-color: #ccd6f6;
    --dark-color: #020c1b;
    --white-color: #e6f1ff;
    --font-primary: 'Helvetica Neue', 'Arial', sans-serif;
    --font-secondary: 'Roboto Mono', monospace;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
    --box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    --border-radius: 8px;
}

body {
    font-family: var(--font-primary);
    font-size: 18px;
    line-height: 1.6;
    color: var(--light-color);
    background-color: var(--dark-color);
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 页面头部 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    background-color: transparent;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

header.scrolled {
    background-color: rgba(10, 25, 47, 0.95);
    padding: 10px 0;
    box-shadow: 0 5px 20px rgba(2, 12, 27, 0.9);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    color: var(--light-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--accent-color);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--light-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* 主要内容区域 */
main {
    margin-top: 100px;
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 25, 47, 0.9) 0%, rgba(2, 12, 27, 0.95) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--white-color);
}

.hero h1 span {
    color: var(--accent-color);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    color: var(--light-color);
}

.btn {
    display: inline-block;
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 15px 35px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 1px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    background: rgba(48, 162, 255, 0.1);
    box-shadow: 0 5px 15px rgba(48, 162, 255, 0.3);
    transform: translateY(-3px);
}

.btn::after {
    content: '→';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: var(--transition);
}

.btn:hover::after {
    right: 20px;
    opacity: 1;
}

/* 问题区域 */
.problems {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--white-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--accent-color);
}

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

.problem-item {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid rgba(100, 255, 218, 0.1);
    height: 100%;
}

.problem-item:hover {
    transform: translateY(-10px);
    border-color: rgba(48, 162, 255, 0.3);
    box-shadow: 0 15px 40px -15px rgba(2, 12, 27, 0.9);
}

.problem-item h3 {
    color: var(--accent-color);
    margin-bottom: 1.2rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.problem-item p {
    color: var(--light-color);
    line-height: 1.7;
}

/* 关于我们页面 */
.about-section {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.about-section .section-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.about-section .section-title::after {
    left: 0;
    transform: translateX(0);
}

.about-content {
    margin-bottom: 3rem;
}

.about-content p {
    color: var(--light-color);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    max-width: 800px;
}

.founder-section {
    background: var(--dark-color);
    padding: 100px 0;
    margin: 50px 0;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.founder-container {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.founder-image {
    flex: 0 0 250px;
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    border: 3px solid var(--accent-color);
}

.founder-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.founder-info h2 {
    color: var(--white-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    position: relative;
}

.founder-info h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
}

.founder-info h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.founder-info ul {
    list-style: none;
    margin-bottom: 2rem;
}

.founder-info ul li {
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
    color: var(--light-color);
    position: relative;
    padding-left: 1.5rem;
}

.founder-info ul li::before {
    content: "✓";
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 0.5rem;
    position: absolute;
    left: 0;
}

.founder-info p {
    color: var(--light-color);
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 产品页面 */
.products-section {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.products-section > p {
    text-align: center;
    color: var(--light-color);
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.product-item {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(100, 255, 218, 0.1);
    height: 100%;
}

.product-item:hover {
    transform: translateY(-10px);
    border-color: rgba(48, 162, 255, 0.3);
    box-shadow: 0 15px 40px -15px rgba(2, 12, 27, 0.9);
}

.product-item h3 {
    color: var(--accent-color);
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
}

.product-item p {
    color: var(--light-color);
    line-height: 1.7;
}

.tech-advantages {
    list-style: none;
    max-width: 1000px;
    margin: 0 auto;
}

.tech-advantages li {
    padding: 1.2rem;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
    color: var(--light-color);
    position: relative;
    padding-left: 1.5rem;
}

.tech-advantages li::before {
    content: "✓";
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 0.5rem;
    position: absolute;
    left: 0;
}

/* 解决方案页面 */
.solutions-section {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.solutions-section > p {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: var(--light-color);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.solution-item {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(100, 255, 218, 0.1);
    height: 100%;
}

.solution-item:hover {
    transform: translateY(-10px);
    border-color: rgba(48, 162, 255, 0.3);
    box-shadow: 0 15px 40px -15px rgba(2, 12, 27, 0.9);
}

.solution-item h3 {
    color: var(--accent-color);
    margin-bottom: 1.2rem;
    font-size: 1.3rem;
}

.solution-item p {
    color: var(--light-color);
    line-height: 1.7;
}

.implementation-values {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.implementation-values li {
    background: rgba(48, 162, 255, 0.1);
    color: var(--accent-color);
    padding: 1.5rem;
    text-align: center;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid rgba(48, 162, 255, 0.3);
}

.implementation-values li:hover {
    background: rgba(48, 162, 255, 0.2);
    transform: translateY(-5px);
}

/* 案例页面 */
.cases-section {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.cases-section > p {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: var(--light-color);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.case-item {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition);
    height: 100%;
}

.case-item:hover {
    transform: translateY(-10px);
    border-color: rgba(48, 162, 255, 0.3);
    box-shadow: 0 15px 40px -15px rgba(2, 12, 27, 0.9);
}

.case-item h3 {
    color: var(--accent-color);
    margin-bottom: 1.2rem;
    font-size: 1.3rem;
}

.case-item p {
    color: var(--light-color);
    margin-bottom: 1rem;
    line-height: 1.7;
}

blockquote {
    background: rgba(10, 25, 47, 0.7);
    padding: 2.5rem;
    border-left: 5px solid var(--accent-color);
    margin: 3rem 0;
    font-style: italic;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    box-shadow: var(--box-shadow);
}

blockquote p {
    color: var(--light-color);
    line-height: 1.8;
    margin-bottom: 1rem;
}

blockquote cite {
    display: block;
    margin-top: 1rem;
    font-weight: bold;
    text-align: right;
    color: var(--accent-color);
}

/* 联系页面 */
.contacts-section {
    padding: 100px 0;
    background-color: var(--primary-color);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-10px);
    border-color: rgba(48, 162, 255, 0.3);
    box-shadow: 0 15px 40px -15px rgba(2, 12, 27, 0.9);
}

.contact-item h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-item p {
    color: var(--light-color);
    margin-bottom: 0.8rem;
}

.contact-item a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--dark-color);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    max-width: 700px;
    margin: 0 auto;
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.contact-form h2 {
    color: var(--white-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    position: relative;
}

.contact-form h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: 4px;
    font-family: inherit;
    background: rgba(10, 25, 47, 0.5);
    color: var(--light-color);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(48, 162, 255, 0.3);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* AI助手样式 */
.ai-assistant-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(48, 162, 255, 0.4);
    z-index: 1001;
    transition: var(--transition);
    font-weight: bold;
    font-size: 12px;
    text-align: center;
    overflow: hidden;
    border: 3px solid var(--accent-color);
    background-image: url('../imges/kefuxiaojiejie.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    pointer-events: auto; /* 确保可以点击 */
}

.ai-assistant-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(48, 162, 255, 0.6);
}

.ai-assistant-toggle span {
    position: relative;
    z-index: 1;
    background: rgba(48, 162, 255, 0.8);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition);
    color: white;
    pointer-events: none; /* 防止文字层阻挡点击 */
}

.ai-assistant-toggle:hover span {
    opacity: 1;
}

.ai-assistant-chat {
    position: fixed;
    bottom: 110px;
    right: 30px;
    width: 350px;
    height: 500px;
    background: var(--dark-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.ai-assistant-chat.hidden {
    display: none;
}

.ai-chat-header {
    padding: 15px;
    background: var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.ai-chat-header h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--white-color);
}

.ai-chat-close {
    background: none;
    border: none;
    color: var(--light-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.ai-chat-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.ai-chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.ai-message {
    max-width: 80%;
    padding: 10px 15px;
    margin-bottom: 15px;
    border-radius: 18px;
    animation: fadeIn 0.3s ease-out;
}

.ai-message-user {
    align-self: flex-end;
    background: var(--accent-color);
    color: var(--dark-color);
    border-bottom-right-radius: 5px;
}

.ai-message-bot {
    align-self: flex-start;
    background: var(--primary-color);
    color: var(--light-color);
    border-bottom-left-radius: 5px;
}

.ai-chat-input-container {
    padding: 15px;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
    display: flex;
    flex-direction: column;
}

.ai-chat-input-container textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: 4px;
    background: rgba(10, 25, 47, 0.5);
    color: var(--light-color);
    font-family: inherit;
    resize: none;
    margin-bottom: 10px;
}

.ai-chat-input-container textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.ai-chat-input-container button {
    align-self: flex-end;
    background: var(--accent-color);
    color: var(--dark-color);
    border: none;
    padding: 8px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.ai-chat-input-container button:hover {
    background: #4db8ff;
}

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

/* 页面底部 */
footer {
    background: var(--dark-color);
    color: var(--light-color);
    padding: 3rem 0;
    margin-top: 5rem;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}

footer .container {
    text-align: center;
}

footer p {
    margin: 0.5rem 0;
    color: var(--light-color);
}

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

footer a:hover {
    text-decoration: underline;
}

/* 页面过渡动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* 延迟动画 */
.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

.delay-4 {
    transition-delay: 0.4s;
}

/* 响应式设计的额外样式 */
@media screen and (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .founder-container {
        flex-direction: column;
        text-align: center;
    }
    
    .founder-info ul li,
    .tech-advantages li {
        padding-left: 1.5rem;
    }
    
    .implementation-values {
        grid-template-columns: 1fr;
    }
    
    nav ul li {
        margin-left: 1rem;
    }
    
    .logo img {
        height: 40px;
    }
    
    /* AI助手响应式调整 */
    .ai-assistant-chat {
        width: 300px;
        height: 400px;
        bottom: 100px;
        right: 20px;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .problem-item,
    .product-item,
    .solution-item,
    .case-item,
    .contact-item,
    .contact-form {
        padding: 1.5rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 8px;
    }
    
    .logo img {
        height: 35px;
    }
    
    /* AI助手响应式调整 */
    .ai-assistant-toggle {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 10px;
    }
    
    .ai-assistant-chat {
        width: calc(100% - 40px);
        height: 350px;
        bottom: 90px;
        right: 20px;
    }
    
    .ai-message {
        max-width: 90%;
    }
}

@media screen and (max-width: 320px) {
    body {
        font-size: 12px;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 8px 15px;
        font-size: 0.8rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .problem-item,
    .product-item,
    .solution-item,
    .case-item,
    .contact-item,
    .contact-form {
        padding: 1rem;
    }
    
    .founder-image {
        flex: 0 0 120px;
        height: 120px;
    }
    
    .tech-advantages li,
    .founder-info ul li {
        padding: 0.5rem 0;
    }
}