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

:root {
    /* 简洁技术风格配色方案 */
    --color-primary: #2563EB; /* 科技蓝 */
    --color-primary-dark: #1D4ED8;
    --color-secondary: #1E293B; /* 深灰蓝文本色 */
    --color-text: #1E293B;
    --color-text-secondary: #64748B; /* 次要文本色 */
    --color-background: #FFFFFF; /* 主背景 */
    --color-surface: #F8FAFC; /* 次要表面 */
    --color-border: #E2E8F0; /* 边框色 */
    --color-success: #10B981; /* 绿色 */
    --color-warning: #F59E0B; /* 橙色 */
    --color-error: #EF4444; /* 红色 */
    
    /* 技术主题色 */
    --color-code: #3B82F6; /* 代码蓝 */
    --color-tech: #8B5CF6; /* 科技紫 */
    --color-accent: #06B6D4; /* 青色点缀 */
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* 字体 */
    --font-primary: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif SC', serif;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 排版 */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    outline: none;
    text-align: center;
    min-height: 44px; /* 触摸目标最小尺寸 */
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(210, 210, 215, 0.3);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-traditional);
}

.logo i {
    color: var(--color-herbal);
    font-size: 1.75rem;
}

.tagline {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    display: none;
}

@media (min-width: 768px) {
    .tagline {
        display: block;
    }
}

.nav-menu {
    display: none;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

.nav-actions {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .nav-actions {
        display: flex;
    }
}

.phone-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
}

.phone-link i {
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }
}

/* 英雄区域 */
.hero {
    padding-top: 6rem;
    padding-bottom: var(--spacing-xxl);
    background: linear-gradient(135deg, rgba(245, 245, 247, 0.5) 0%, rgba(255, 255, 255, 1) 100%);
}

.hero .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    align-items: center;
}

@media (min-width: 992px) {
    .hero .container {
        flex-direction: row;
        align-items: center;
    }
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--color-surface) 0%, white 100%);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

@media (min-width: 768px) {
    .image-placeholder {
        height: 400px;
    }
}

.herbal-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 25% 25%, rgba(46, 139, 87, 0.1) 2px, transparent 2px);
    background-size: 50px 50px;
}

.floating-element {
    position: absolute;
    top: 20%;
    right: 20%;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-herbal);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.floating-element-2 {
    top: 60%;
    left: 20%;
    animation-delay: 2s;
    color: var(--color-traditional);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

/* 通用部分样式 */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 服务项目 */
.services {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-surface);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(46, 139, 87, 0.1) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
    color: var(--color-primary);
}

.service-title {
    margin-bottom: var(--spacing-sm);
}

.service-description {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.service-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

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

/* 关于我们 */
.about {
    padding: var(--spacing-xxl) 0;
}

.about .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    align-items: center;
}

@media (min-width: 992px) {
    .about .container {
        flex-direction: row;
        align-items: flex-start;
    }
}

.about-content {
    flex: 1;
}

.about-text {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    line-height: 1.7;
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (min-width: 768px) {
    .stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.about-image {
    flex: 1;
}

/* 专家团队 */
.team {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-surface);
}

.team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.team-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(46, 139, 87, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 3rem;
    color: var(--color-primary);
}

.team-name {
    margin-bottom: 0.5rem;
}

.team-title {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.team-bio {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* 预约咨询 */
.appointment {
    padding: var(--spacing-xxl) 0;
}

.appointment .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

@media (min-width: 992px) {
    .appointment .container {
        flex-direction: row;
    }
}

.appointment-content {
    flex: 1;
}

.appointment-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text);
    background: white;
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.appointment-info {
    flex: 1;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.info-title {
    margin-bottom: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.contact-item i {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-top: 0.25rem;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--color-text);
}

.contact-item p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* 页脚 */
.footer {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-brand {
    flex: 1;
}

.footer-tagline {
    margin-top: var(--spacing-xs);
    color: var(--color-text-secondary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    flex: 2;
}

@media (min-width: 768px) {
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-column h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    color: var(--color-text);
}

.footer-column a {
    display: block;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

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

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin: 0.25rem 0;
}

/* 响应式调整 */
@media (max-width: 767px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .hero {
        padding-top: 5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
    }
}

/* 技术相关样式 */
.tech-badges {
    display: flex;
    gap: 0.75rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.tech-badge {
    background: linear-gradient(135deg, var(--color-primary) 0%, #4D7CFF 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-block;
}

.code-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 113, 227, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(77, 124, 255, 0.05) 0%, transparent 50%);
    opacity: 0.6;
}

.architecture-diagram {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.arch-layer {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    font-weight: 600;
    color: var(--color-primary);
    border: 2px solid rgba(0, 113, 227, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.arch-layer:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tech-stack {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

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

.tech-stack ul {
    list-style: none;
    padding: 0;
}

.tech-stack li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.tech-stack li:last-child {
    border-bottom: none;
}

.tech-stack li strong {
    color: var(--color-text);
    min-width: 120px;
    display: inline-block;
}

.demo-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.demo-features {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.demo-tag {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.demo-cta {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.demo-note {
    margin-top: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.download-options {
    margin-top: 2rem;
    text-align: center;
}

.download-options p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.tech-resources {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.tech-resources h4 {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.tech-resources ul {
    list-style: none;
    padding: 0;
}

.tech-resources li {
    margin-bottom: 0.5rem;
}

.tech-resources a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.tech-resources a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.footer-tech {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: rgba(0, 113, 227, 0.1);
    color: var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* ICP备案号样式 */
.footer-bottom a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-bottom a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-bottom p:last-child {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}