/* ========================================
   尧图网络 - 日式简约风格样式表
   亚麻灰 + 原木色 + 米白配色方案
   ======================================== */

/* CSS Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 日式简约配色 */
    --linen-gray: #E8E4D9;
    --wood-brown: #8B7355;
    --rice-white: #F5F1E8;
    --dark-text: #4A4A4A;
    --light-bg: #FAF9F6;
    --accent-green: #7D8C7D;
    --warm-beige: #F0EBE0;
    --deep-brown: #5C4A3D;
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: "Hiragino Sans GB", "Microsoft YaHei", "PingFang SC", sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.8;
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ========================================
   导航栏样式 - 固定顶部响应式
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: all var(--transition-normal);
    padding: var(--spacing-md) 0;
}

.site-header.scrolled {
    background: rgba(245, 241, 232, 0.98);
    box-shadow: 0 2px 20px rgba(139, 115, 85, 0.1);
    padding: var(--spacing-sm) 0;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--wood-brown);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-item {
    position: relative;
}

.nav-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--dark-text);
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--wood-brown);
    transform: translateX(-50%);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--wood-brown);
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 移动端菜单 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--rice-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
        padding: var(--spacing-sm);
    }
}

/* ========================================
   页面主体布局 - 横竖板块拼接
   ======================================== */
.main-content {
    padding-top: 100px;
}

.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.section-alt {
    background: var(--rice-white);
}

.section-dark {
    background: var(--linen-gray);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ========================================
   Hero Banner - 全屏横幅
   ======================================== */
.hero-banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(139, 115, 85, 0.3), rgba(74, 74, 74, 0.5));
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: #fff;
    max-width: 900px;
    padding: var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.15em;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 0.8s;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 3rem;
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
    font-size: 1rem;
    letter-spacing: 0.1em;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards 1.1s;
}

.hero-btn:hover {
    background: #fff;
    color: var(--wood-brown);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   服务卡片 - 不规则网格布局
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background: #fff;
    padding: var(--spacing-lg);
    border-radius: 0;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    border-left: 3px solid transparent;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--linen-gray);
    transform: translateX(50%) translateY(-50%) rotate(45deg);
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    border-left-color: var(--wood-brown);
    box-shadow: 0 20px 40px rgba(139, 115, 85, 0.15);
}

.service-card:hover::before {
    width: 150px;
    height: 150px;
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.service-title {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--dark-text);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* ========================================
   案例展示 - 交错布局
   ======================================== */
.cases-section {
    background: var(--linen-gray);
}

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

.case-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.case-item:nth-child(2) {
    margin-top: var(--spacing-lg);
}

.case-item:nth-child(3) {
    margin-top: calc(var(--spacing-lg) * 2);
}

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(transparent, rgba(139, 115, 85, 0.9));
    color: #fff;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.case-item:hover img {
    transform: scale(1.1);
}

.case-item:hover .case-overlay {
    transform: translateY(0);
}

.case-category {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.case-title {
    font-size: 1.2rem;
    font-weight: 500;
}

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-item:nth-child(n) {
        margin-top: 0;
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   新闻资讯 - 列表布局
   ======================================== */
.news-section {
    background: #fff;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 300;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.1em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--dark-text);
    opacity: 0.7;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.news-card {
    background: var(--light-bg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(139, 115, 85, 0.1);
}

.news-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

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

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

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

.news-date {
    font-size: 0.85rem;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-xs);
}

.news-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.news-excerpt {
    font-size: 0.9rem;
    color: var(--dark-text);
    opacity: 0.8;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.btn-outline {
    display: inline-block;
    padding: 0.8rem 2.5rem;
    border: 1px solid var(--wood-brown);
    color: var(--wood-brown);
    font-size: 0.95rem;
    transition: all var(--transition-normal);
}

.btn-outline:hover {
    background: var(--wood-brown);
    color: #fff;
}

/* ========================================
   团队介绍 - 横向排列
   ======================================== */
.team-section {
    background: var(--rice-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.team-card {
    text-align: center;
    padding: var(--spacing-md);
    background: #fff;
    transition: all var(--transition-normal);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(139, 115, 85, 0.1);
}

.team-image {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

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

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

.team-name {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-xs);
}

.team-role {
    font-size: 0.9rem;
    color: var(--dark-text);
    opacity: 0.7;
    margin-bottom: var(--spacing-sm);
}

.team-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--dark-text);
}

/* ========================================
   关于我们 - 图文混排
   ======================================== */
.about-section {
    background: var(--light-bg);
}

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

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 0;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--wood-brown);
    z-index: -1;
}

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

.about-label {
    font-size: 0.9rem;
    color: var(--wood-brown);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.about-title {
    font-size: 2rem;
    font-weight: 300;
    color: var(--dark-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.about-text {
    font-size: 1rem;
    line-height: 2;
    color: var(--dark-text);
    margin-bottom: var(--spacing-md);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--linen-gray);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--wood-brown);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--dark-text);
    margin-top: var(--spacing-xs);
}

@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
}

/* ========================================
   页脚样式
   ======================================== */
.site-footer {
    background: var(--deep-brown);
    color: #fff;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.footer-brand {
    padding-right: var(--spacing-lg);
}

.footer-logo {
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 50px;
    filter: brightness(0) invert(1);
}

.footer-desc {
    font-size: 0.95rem;
    line-height: 1.8;
    opacity: 0.8;
    margin-bottom: var(--spacing-md);
}

.footer-contact {
    font-size: 0.9rem;
    line-height: 2;
    opacity: 0.7;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-link {
    font-size: 0.95rem;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.footer-link:hover {
    opacity: 1;
}

.footer-newsletter p {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    max-width: 1400px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.6;
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   滚动渐入动画
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   通用按钮样式
   ======================================== */
.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--wood-brown);
    color: #fff;
    font-size: 1rem;
    letter-spacing: 0.05em;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary:hover {
    background: var(--deep-brown);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(139, 115, 85, 0.3);
}

/* ========================================
   内页通用样式
   ======================================== */
.page-header {
    background: var(--linen-gray);
    padding: calc(var(--spacing-xl) * 2) var(--spacing-md) var(--spacing-xl);
    text-align: center;
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 300;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.1em;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--dark-text);
    opacity: 0.7;
}

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

/* ========================================
   新闻列表页样式
   ======================================== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.news-list-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: #fff;
    transition: all var(--transition-normal);
}

.news-list-item:hover {
    box-shadow: 0 10px 30px rgba(139, 115, 85, 0.1);
}

.news-list-item .news-image {
    aspect-ratio: 4/3;
}

.news-list-item .news-content {
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@media (max-width: 768px) {
    .news-list-item {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   新闻详情页样式
   ======================================== */
.news-detail {
    max-width: 900px;
    margin: 0 auto;
}

.news-detail-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--linen-gray);
}

.news-detail-title {
    font-size: 2rem;
    font-weight: 400;
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.news-detail-meta {
    font-size: 0.9rem;
    color: var(--wood-brown);
}

.news-detail-content {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--dark-text);
}

.news-detail-content img {
    max-width: 100%;
    margin: var(--spacing-md) 0;
}

.news-related {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--linen-gray);
}

.related-title {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   联系表单样式
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info {
    padding: var(--spacing-lg);
    background: var(--linen-gray);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
}

.contact-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.contact-text h4 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-xs);
}

.contact-text p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--dark-text);
}

.contact-form {
    padding: var(--spacing-lg);
    background: #fff;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.9rem;
    color: var(--dark-text);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--linen-gray);
    background: var(--light-bg);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

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

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

@media (max-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   案例详情页样式
   ======================================== */
.case-detail-hero {
    height: 60vh;
    min-height: 400px;
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.case-detail-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-detail-info {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.case-detail-title {
    font-size: 2rem;
    font-weight: 400;
    color: var(--dark-text);
    margin-bottom: var(--spacing-md);
}

.case-detail-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--linen-gray);
}

.meta-item {
    font-size: 0.9rem;
    color: var(--dark-text);
}

.meta-label {
    color: var(--wood-brown);
    margin-right: var(--spacing-xs);
}

.case-detail-content {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--dark-text);
}

/* ========================================
   服务详情页样式
   ======================================== */
.service-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.service-detail-content {
    padding-right: var(--spacing-lg);
}

.service-detail-sidebar {
    padding: var(--spacing-lg);
    background: var(--linen-gray);
    height: fit-content;
    position: sticky;
    top: 120px;
}

.sidebar-title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--wood-brown);
    margin-bottom: var(--spacing-md);
}

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

.sidebar-link {
    padding: var(--spacing-sm);
    background: #fff;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--wood-brown);
    color: #fff;
}

@media (max-width: 992px) {
    .service-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .service-detail-content {
        padding-right: 0;
    }
    
    .service-detail-sidebar {
        position: static;
    }
}