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

:root {
    --color-wood: #8B6914;
    --color-wood-light: #C4A35A;
    --color-wood-dark: #5C4A1F;
    --color-white: #FFFFFF;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-600: #666666;
    --color-gray-800: #333333;
    --color-black: #1A1A1A;
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    font-family: var(--font-sans);
    color: var(--color-gray-800);
    line-height: 1.6;
    background: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
}

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

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-gray-800);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
}

/* 首页大图 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
}

.hero-content {
    text-align: center;
    color: var(--color-white);
    max-width: 800px;
    padding: 0 24px;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: 56px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 24px;
    letter-spacing: 8px;
}

.hero-content h1.vertical-text {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 30px;
    font-size: 42px;
    letter-spacing: 4px;
    margin-bottom: 60px;
}

.hero-content h1.vertical-text span {
    writing-mode: vertical-rl;
    text-orientation: upright;
}

.hero-content .subtitle {
    margin-top: 40px;
}

.hero-content .subtitle {
    font-size: 20px;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: 4px;
}

.hero-content .desc {
    font-size: 16px;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.8;
}

.btn-primary {
    display: inline-block;
    padding: 16px 40px;
    background: var(--color-wood);
    color: var(--color-white);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--color-wood-dark);
}

/* 通用标题 */
.section-title {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-gray-800);
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--color-gray-600);
    margin-bottom: 60px;
}

/* 核心业务 */
.business {
    padding: 120px 0;
    background: var(--color-gray-100);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.business-item {
    text-align: center;
    padding: 40px 24px;
    background: var(--color-white);
    transition: transform 0.3s, box-shadow 0.3s;
}

.business-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.business-item .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--color-wood);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
}

.business-item h3 {
    font-family: var(--font-serif);
    font-size: 20px;
    margin-bottom: 12px;
}

.business-item p {
    font-size: 14px;
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* 案例展示 */
.cases {
    padding: 120px 0;
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--color-gray-200);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-wood);
    color: var(--color-white);
    border-color: var(--color-wood);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

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

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: var(--color-white);
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s;
}

.case-item:hover .case-overlay {
    transform: translateY(0);
    opacity: 1;
}

.case-overlay h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    margin-bottom: 8px;
}

.case-overlay p {
    font-size: 14px;
    opacity: 0.8;
}

/* 工艺匠心 */
.craft {
    padding: 120px 0;
    background: var(--color-gray-100);
}

.craft-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.craft-text h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    margin: 40px 0 16px;
    color: var(--color-wood);
}

.craft-text h3:first-child {
    margin-top: 0;
}

.craft-text p {
    font-size: 15px;
    color: var(--color-gray-600);
    line-height: 1.8;
}

.craft-image img {
    width: 100%;
    height: auto;
}

/* 服务流程 */
.service {
    padding: 120px 0;
}

.service-steps {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.step {
    flex: 1;
    text-align: center;
    padding: 40px 20px;
    border-top: 2px solid var(--color-wood);
}

.step-num {
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 300;
    color: var(--color-wood);
    margin-bottom: 20px;
    opacity: 0.5;
}

.step h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    margin-bottom: 12px;
}

.step p {
    font-size: 14px;
    color: var(--color-gray-600);
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: var(--color-gray-100);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.info-item h4 {
    font-family: var(--font-serif);
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--color-wood);
}

.info-item p {
    font-size: 15px;
    color: var(--color-gray-600);
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 16px;
    border: 1px solid var(--color-gray-200);
    font-size: 15px;
    font-family: inherit;
    background: var(--color-white);
    transition: border-color 0.3s;
}

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

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    padding: 60px 0 30px;
    background: var(--color-black);
    color: var(--color-white);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo img {
    height: 36px;
    margin-bottom: 12px;
    filter: brightness(0) invert(1); /* 黑色变白色 */
}

.footer-logo p {
    font-size: 14px;
    opacity: 0.6;
}

.footer-links {
    display: flex;
    gap: 40px;
}

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    font-size: 14px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    font-size: 13px;
    opacity: 0.5;
}

/* 响应式 */
@media (max-width: 1024px) {
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .craft-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .service-steps {
        flex-wrap: wrap;
    }
    
    .step {
        flex: 0 0 calc(50% - 15px);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 36px;
        letter-spacing: 4px;
    }
    
    .business-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex: 0 0 100%;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }
    
    .footer-links {
        gap: 24px;
    }
}

/* 图片弹窗 */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    font-size: 40px;
    color: var(--color-white);
    cursor: pointer;
    transition: color 0.3s;
    z-index: 2001;
}

.lightbox-close:hover {
    color: var(--color-wood-light);
}

.lightbox-content h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--color-white);
}

.lightbox-slider {
    position: relative;
    width: 100%;
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-slider img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: opacity 0.3s;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--color-white);
    font-size: 24px;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-prev {
    left: -70px;
}

.lightbox-next {
    right: -70px;
}

.lightbox-counter {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-white);
    font-size: 14px;
    opacity: 0.7;
}

/* 材质选择网格 */
.material-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-height: 60vh;
    overflow-y: auto;
    padding: 20px;
}

.material-item {
    cursor: pointer;
    transition: transform 0.3s;
}

.material-item:hover {
    transform: scale(1.05);
}

.material-item img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.material-item h4 {
    text-align: center;
    color: var(--color-white);
    margin-top: 10px;
    font-size: 16px;
    font-weight: 500;
}

.back-to-materials {
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-white);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.back-to-materials:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* 创始人介绍 */
.founder {
    padding: 120px 0;
    background: var(--color-gray-100);
}

.founder-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 80px;
    align-items: center;
}

.founder-image {
    position: relative;
}

.founder-image img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
}

.founder-text {
    padding-right: 40px;
}

.founder-name {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-gray-800);
}

.founder-en {
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 400;
    color: var(--color-wood);
    letter-spacing: 2px;
}

.founder-title {
    font-size: 16px;
    color: var(--color-gray-600);
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-gray-200);
}

.founder-desc p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-gray-600);
    margin-bottom: 16px;
}

@media (max-width: 1024px) {
    .founder-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .founder-image {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .founder-text {
        padding-right: 0;
        text-align: center;
    }
}

/* 材质展示区 */
.materials-section {
    margin-top: 40px;
}

.materials-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-gray-200);
}

.materials-header h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    color: var(--color-gray-800);
}

.back-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--color-gray-300);
    color: var(--color-gray-600);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.back-btn:hover {
    border-color: var(--color-wood);
    color: var(--color-wood);
}

@media (max-width: 1024px) {
    .material-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .lightbox-content {
        width: 95%;
        height: 60vh;
    }
    
    .lightbox-slider {
        height: 50vh;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .material-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}