/* 科技公司主题样式 */
:root {
    --cream-primary: #fff8e1;
    --cream-secondary: #fff3e0;
    --cream-light: #fffde7;
    --text-dark: #111111;
    --text-medium: #1a1919;
    --accent: rgb(173, 44, 44);
    --success: #81c784;
    --warning: #ffb74d;
    --danger: #e57373;
}

/* 基础样式 */
html {
    font-size: 100%;
    line-height: 1.6rem;
    box-sizing: border-box;
    font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    height: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0 auto;
    padding: 60px 0 80px 0; /* 减少顶部内边距，适应小屏幕 */
    min-height: 100%;
    background: var(--cream-primary);
    color: var(--text-dark);
}

*, *::before, *::after {
    box-sizing: inherit;
}

img, video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

/* 导航栏样式 - 科技感设计 */
.main-nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(245, 245, 220, 0.95);
    padding: 1rem 0; /* 减少导航栏内边距 */
    z-index: 1000;
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(138, 117, 92, 0.3);
    box-shadow: 0 2px 20px rgba(138, 117, 92, 0.2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem; /* 保持原有内边距 */
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    color: var(--accent);
    font-size: 1.4rem; /* 稍微减小字体大小，避免顶部截断 */
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
    white-space: nowrap; /* 防止文字换行 */
    overflow: visible; /* 确保文字完全可见 */
    padding: 0.2rem 0; /* 增加上下内边距，避免文字被截断 */
    line-height: 1.2; /* 优化行高 */
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2.5rem;
}
.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}
/* 返回主页按钮 */
.home-button {
    position: fixed;
    top: calc(3.5rem + 2rem); /* 导航栏高度 + 进一步增加的内边距 */
    left: 20px;
    background: linear-gradient(135deg, var(--accent), var(--warning));
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    z-index: 1001; /* 高于导航栏的z-index */
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(138, 117, 92, 0.3);
    border: none;
}
/* 小屏幕设备调整 */
@media (max-width: 768px) {
    body {
        padding-top: 3.5rem;
    }
    
    .main-nav {
        padding: 0.8rem 0;
        height: 3.5rem;
        display: flex;
        align-items: center; /* 垂直居中导航栏内容 */
    }
    
    .nav-container {
        align-items: center; /* 垂直居中对齐容器内容 */
    }
    
    .home-button {
        top: calc(3.5rem + 0.5rem); /* 减少间距 */
        left: 10px;
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    body {
        padding-top: 3rem;
    }
    
    .main-nav {
        padding: 0.5rem 0;
        height: 3rem;
    }
    
    .home-button {
        top: calc(3rem + 0.3rem); /* 进一步减少间距 */
        left: 10px;
        padding: 0.4rem 0.8rem;
        font-size: 0.7rem;
        position: fixed;
        display: block;
        width: auto;
        text-align: center;
        margin: 0;
    }
}

.home-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.6);
}

/* Hero区域样式 - 科技感 */
.main-hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    background: linear-gradient(135deg, var(--cream-secondary) 0%, var(--cream-primary) 50%, var(--cream-secondary) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(138, 117, 92, 0.2), rgba(143, 188, 143, 0.15));
    z-index: 2;
}

.hero-content {
    position: relative;
    text-align: center;
    color: var(--text-dark);
    padding: 2rem;
    z-index: 20; /* 确保内容在overlay之上 */
}

.hero-title {
    font-size: clamp(1.8rem, 8vw, 3.5rem);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent), var(--warning));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    padding: 0 1rem;
    word-break: break-word;
    white-space: normal;
}

.hero-subtitle {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    font-weight: 300;
    color: var(--accent);
}

.hero-description {
    font-size: 1.4rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    color: var(--text-medium);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}
/* 确保锚点目标可见 */
#services, #contact, #about, #solutions {
    scroll-margin-top: 120px; /* 为固定导航栏留出空间 */
    position: relative;
    z-index: 10;
}

.hero-cta-button {
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--accent), var(--warning));
    color: white;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid var(--accent);
    box-shadow: 0 4px 15px rgba(138, 117, 92, 0.3);
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    position: relative;
    z-index: 10; /* 确保按钮在前景显示 */
}

.hero-cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.6);
    text-decoration: none;
    color: white;
}

.hero-cta-button:active {
    transform: translateY(2px) scale(0.98);
    box-shadow: 0 1px 8px rgba(0, 102, 204, 0.3);
    background: linear-gradient(135deg, var(--accent), var(--warning));
    filter: brightness(0.9); /* 增加颜色变暗效果 */
}

.hero-cta-button.outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    cursor: pointer;
}

.hero-cta-button.outline:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.6);
    text-decoration: none;
    color: var(--accent);
}

.hero-cta-button.outline:active {
    transform: translateY(2px) scale(0.98);
    box-shadow: 0 1px 8px rgba(0, 102, 204, 0.3);
    background: rgba(173, 44, 44, 0.1); /* 点击时添加淡色背景 */
    filter: brightness(0.9);
}

/* 核心技术优势 */
.tech-features {
    padding: 5rem 0;
    background: rgba(245, 245, 220, 0.8);
    backdrop-filter: blur(10px);
}

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

/* 卡片样式 */
.feature-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(0, 204, 255, 0.2);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 150, 255, 0.4), 
                0 5px 15px rgba(138, 117, 92, 0.3);
    border-color: var(--accent);
    outline: 1px solid rgba(0, 150, 255, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}
.feature-card h3 {
    color: var(--accent);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* 通用容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
/* 部分标题样式 */
.section-title {
    text-align: center;
    font-size: 2.6rem; /* 进一步微调，与页面其他文字更协调 */
    color: var(--accent);
    margin-bottom: 2rem;
    padding-top: 30px;
    padding-bottom: 0.5rem;
    line-height: 1.2; /* 调整行高 */
}

/* 关于我们部分 */
.about-section {
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--cream-secondary) 0%, var(--cream-primary) 100%);
    overflow: visible;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

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

.about-text p {
    line-height: 1.8; /* 增加行高 */
    margin-bottom: 2rem;
    color: var(--text-medium);
    padding-bottom: 0.5rem; /* 添加底部内边距 */
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.tech-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent), var(--warning));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
}

/* 技术服务部分 */
.services-section {
    padding: 5rem 0;
    background: rgba(248, 248, 230, 0.9);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 3rem 2rem;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(0, 204, 255, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 204, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 20px rgba(0, 150, 255, 0.4), 
                0 8px 25px rgba(138, 117, 92, 0.3);
    border-color: var(--accent);
    outline: 1px solid rgba(0, 150, 255, 0.4);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    color: var(--accent);
    margin-bottom: 1.2rem;
    font-size: 1.5rem;
}

.service-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* 解决方案部分 */
.solutions-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--cream-primary) 0%, var(--cream-secondary) 100%);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.solution-card {
    background: rgba(255, 255, 255, 0.15);
    padding: 2.5rem;
    border-radius: 15px;
    border: 1px solid rgba(0, 204, 255, 0.2);
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 204, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.solution-card:hover::before {
    left: 100%;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 20px rgba(0, 150, 255, 0.4), 
                0 8px 25px rgba(138, 117, 92, 0.3);
    border-color: var(--accent);
    outline: 1px solid rgba(0, 150, 255, 0.4);
}

.solution-card h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

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

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

.solution-card li {
    color: var(--text-medium);
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.solution-card li::before {
    content: '➤';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* 联系我们部分 */
.contact-section {
    padding: 5rem 0;
    background: rgba(248, 248, 230, 0.9);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(305px, 1fr));
    gap: 1.5rem;
    max-width: 1020px;
    margin: 0 auto;
}

.contact-info {
    text-align: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 1.5rem 1.5rem;
    border-radius: 15px;
    border: 1px solid rgba(138, 117, 92, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.contact-info:hover {
    transform: translateY(-5px);
                0 5px 15px rgba(138, 117, 92, 0.3);
    border-color: var(--accent);
    outline: 1px solid rgba(0, 150, 255, 0.3);
}

.contact-info h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    min-height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 0.5rem;
}
.contact-info p {
    color: var(--text-medium);
    margin-bottom: 0.1rem;
    font-weight: 500;
    line-height: 1.1;
}

/* 页脚样式 */
.main-footer {
    background: transparent;
    color: var(--text-dark);
    padding: 0.3rem 0; /* 减少上下内边距 */
    width: 100%;
    text-align: center;
    box-sizing: border-box;
    margin-top: 1rem; /* 增加顶部外边距 */
}

/* 超大屏幕适配 */
@media (min-width: 1200px) {
    .main-footer .container {
        max-width: 1200px;
        margin: 0 auto;
    }
}

@media (min-width: 1600px) {
    .main-footer .container {
        max-width: 1400px;
    }
}

@media (min-width: 2000px) {
    .main-footer .container {
        max-width: 1600px;
        margin: 0 auto;
    }
}

@media (min-width: 2500px) {
    .main-footer .container {
        max-width: 2000px;
        margin: 0 auto;
    }
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem; /* 减少间距 */
    align-items: center;
    margin-bottom: 1rem; /* 减少底部外边距 */
    padding: 0.5rem 0; /* 增加内边距 */
}

.footer-brand h3 {
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.footer-brand p {
    color: var(--text-medium);
}

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

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

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

.footer-bottom {
    text-align: center;
    padding-top: 1rem; /* 减少顶部内边距 */
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    line-height: 1.4; /* 调整行高 */
}

.footer-bottom p {
    margin: 0.5rem 0;
    color: var(--text-medium);
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 0.5rem; /* 减小导航项间距 */
        align-items: center; /* 居中对齐整个导航菜单 */
    }
    
    .nav-logo {
        font-size: 1.1rem; /* 稍微减小logo字体大小 */
        white-space: nowrap; /* 防止logo文字换行 */
    }
    
    .nav-link {
        font-size: 0.85rem; /* 进一步减小导航链接字体大小 */
        word-break: break-all; /* 文字内部换行 */
        line-height: 1.1; /* 减小行高，精确对齐 */
        text-align: center; /* 文字居中 */
        min-width: 2em; /* 最小宽度 */
        padding: 0.3rem 0.1rem; /* 精确调整内边距 */
        display: flex;
        flex-direction: column;
        justify-content: center; /* 垂直居中 */
        align-items: center; /* 水平居中 */
        height: 100%; /* 填满容器高度 */
    }
    
    /* 为每个字符添加精确对齐 */
    .nav-link span {
        display: block;
        line-height: 1; /* 单行行高 */
        height: 1em; /* 固定高度 */
    }
    
    .hero-title {
        font-size: 1.8rem;
        line-height: 1.5; /* 增加行高 */
        padding: 0 0.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.6rem;
        line-height: 1.4; /* 增加行高 */
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .features-grid,
    .services-grid,
    .solutions-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        gap: 0.8rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-logo {
        font-size: 1rem; /* 在超小屏幕上进一步减小字体大小 */
    }
    
    .hero-title {
        font-size: 1.5rem;
        line-height: 1.6; /* 增加行高 */
        padding: 0 0.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
        line-height: 1.5; /* 增加行高 */
    }
    
    .section-title {
        font-size: 2.2rem;
        line-height: 1.4; /* 增加行高 */
    }
    
    .feature-card,
    .service-card,
    .solution-card {
        padding: 2rem 1.5rem;
    }
}

/* 动画效果 */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.feature-card,
.service-card,
.solution-card {
    animation: float 6s ease-in-out infinite;
}

.feature-card:nth-child(2),
.service-card:nth-child(2),
.solution-card:nth-child(2) {
    animation-delay: 1s;
}

.feature-card:nth-child(3),
.service-card:nth-child(3),
.solution-card:nth-child(3) {
    animation-delay: 2s;
}

.feature-card:nth-child(4),
.service-card:nth-child(4) {
    animation-delay: 3s;
}