/* 
 * XHSOM 专业版网站样式
 * 风格：极简科技感 + 小红书红色系
 */

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

:root {
    /* 小红书红色系 */
    --color-primary: #ff2442;
    --color-primary-dark: #e01e3c;
    --color-primary-light: #ff4d6a;
    --color-primary-bg: rgba(255, 36, 66, 0.08);
    
    /* 中性色 */
    --color-black: #0a0a0a;
    --color-dark: #1a1a1a;
    --color-gray: #666666;
    --color-light: #999999;
    --color-lighter: #f5f5f5;
    --color-white: #ffffff;
    
    /* 功能色 */
    --color-success: #00c853;
    --color-warning: #ffab00;
    
    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.16);
    --shadow-red: 0 8px 30px rgba(255, 36, 66, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-dark);
    background: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    color: var(--color-black);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    text-decoration: none;
    color: var(--color-gray);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.btn-nav {
    display: inline-block;
    padding: 10px 24px;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-nav:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-red);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    transition: all 0.3s ease;
}

/* ========== 英雄区 ========== */
.hero {
    padding: calc(72px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(135deg, #fff5f6 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 36, 66, 0.08) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

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

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(255, 36, 66, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    color: var(--color-black);
}

.hero-title .highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    width: 100%;
    height: 12px;
    background: rgba(255, 36, 66, 0.2);
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.hero-desc {
    font-size: 1rem;
    color: var(--color-light);
    margin-bottom: var(--spacing-md);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-red);
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(5px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-dark);
    border-color: rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
    border-color: var(--color-dark);
    background: transparent;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-light);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
}

.visual-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
}

.visual-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.visual-card:hover img {
    transform: scale(1.05);
}

.visual-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--color-white);
}

.visual-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.visual-title {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
}

/* ========== 通用区块样式 ========== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(255, 36, 66, 0.2);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== 服务项目 ========== */
.services {
    background: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 36, 66, 0.3);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.featured {
    background: linear-gradient(135deg, var(--color-primary-bg) 0%, rgba(255, 255, 255, 0.5) 100%);
    border-color: rgba(255, 36, 66, 0.3);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.service-card > p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-list li {
    font-size: 0.9rem;
    color: var(--color-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ========== 案例展示 ========== */
.cases {
    background: var(--color-lighter);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.case-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.case-card.large {
    grid-column: span 2;
}

.case-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.case-content {
    padding: var(--spacing-md);
}

.case-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.case-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 8px;
}

.case-content p {
    color: var(--color-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.case-metrics {
    display: flex;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-xs);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    font-size: 0.85rem;
    color: var(--color-light);
}

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

/* ========== 关于我们 ========== */
.about {
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-content .section-tag,
.about-content .section-title {
    text-align: left;
}

.about-text {
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.about-features {
    list-style: none;
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.about-features li {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.feature-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.about-features li strong {
    display: block;
    color: var(--color-black);
    margin-bottom: 4px;
}

.about-features li span {
    color: var(--color-light);
    font-size: 0.9rem;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-stack {
    position: relative;
    width: 300px;
    height: 300px;
}

.stack-card {
    position: absolute;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--color-white);
}

.stack-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-1 {
    width: 200px;
    height: 200px;
    top: 0;
    left: 0;
    z-index: 2;
}

.card-2 {
    width: 180px;
    height: 180px;
    bottom: 0;
    right: 0;
    z-index: 1;
}

/* ========== 联系我们 ========== */
.contact {
    background: linear-gradient(135deg, #fff5f6 0%, #ffffff 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.contact-info .section-tag,
.contact-info .section-title {
    text-align: left;
}

.contact-desc {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    background: var(--color-lighter);
}

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

.contact-item strong {
    display: block;
    color: var(--color-black);
    font-size: 0.9rem;
}

.contact-item p {
    color: var(--color-gray);
    font-size: 0.9rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--color-white);
}

.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(255, 36, 66, 0.1);
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

.form-tip {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-light);
    margin-top: var(--spacing-xs);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
}

.footer-brand p {
    color: var(--color-light);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.footer-col a {
    display: block;
    color: var(--color-light);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    color: var(--color-light);
    font-size: 0.85rem;
}

/* ========== 响应式设计 ========== */
@media (max-width: 992px) {
    .hero-grid,
    .about-grid,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero-visual,
    .about-visual {
        order: -1;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-card.large {
        grid-column: span 1;
    }
    
    .nav-links,
    .btn-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .footer-top {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.service-card,
.case-card {
    animation: fadeInUp 0.6s ease-out backwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }
.service-card:nth-child(5) { animation-delay: 0.5s; }
.service-card:nth-child(6) { animation-delay: 0.6s; }