/* ========================================
   Anobrite - 海拓互联 网站建设官网
   机械简约风 CSS - 铁灰 + 深黑 + 纯白
   ======================================== */

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

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

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, 'Microsoft YaHei', sans-serif;
    background-color: #0a0a0a;
    color: #f5f5f5;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul, ol {
    list-style: none;
}

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

/* ========================================
   顶部导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #2a2a2a;
    transition: all 0.4s ease;
}

.header.scrolled {
    background: rgba(5, 5, 5, 0.98);
    border-bottom-color: #3a3a3a;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.logo-text span {
    color: #6b7280;
    font-size: 14px;
    display: block;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 12px 20px;
    color: #9ca3af;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: #ffffff;
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #ffffff;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: #ffffff;
    transition: all 0.3s ease;
}

.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);
}

/* ========================================
   波浪曲线分割
   ========================================
.section-divider {
    position: relative;
    height: 100px;
    overflow: hidden;
}

.section-divider::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: #0a0a0a;
    clip-path: ellipse(60% 100% at 50% 100%);
}

.section-divider.up::before {
    background: #111111;
    clip-path: ellipse(60% 100% at 50% 0%);
}
*/

.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
}

.wave-divider .shape-fill {
    fill: #111111;
}

.wave-divider-up {
    top: 0;
    bottom: auto;
    transform: rotate(180deg);
}

/* ========================================
   Hero Banner
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 40px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #2a2a2a;
    border-radius: 50px;
    font-size: 13px;
    color: #9ca3af;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.hero-title {
    font-size: clamp(32px, 5vw, 64px);
    font-weight: 800;
    color: #ffffff;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-title span {
    display: block;
    background: linear-gradient(90deg, #ffffff 0%, #6b7280 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: #9ca3af;
    max-width: 700px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: #ffffff;
    color: #0a0a0a;
    border: 2px solid #ffffff;
}

.btn-primary:hover {
    background: transparent;
    color: #ffffff;
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #2a2a2a;
}

.btn-secondary:hover {
    border-color: #ffffff;
    transform: translateY(-3px);
}

/* ========================================
   通用 Section
   ======================================== */
section {
    padding: 100px 40px;
    position: relative;
}

.section-dark {
    background: #0a0a0a;
}

.section-gray {
    background: #111111;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid #2a2a2a;
    border-radius: 50px;
    font-size: 12px;
    color: #6b7280;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: #9ca3af;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   服务卡片
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: linear-gradient(145deg, #1a1a1a 0%, #0f0f0f 100%);
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 40px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #ffffff 0%, #6b7280 100%);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: #3a3a3a;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 24px;
}

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

.service-title {
    font-size: 22px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 15px;
    color: #9ca3af;
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #ffffff;
    font-weight: 500;
}

.service-link:hover {
    gap: 12px;
}

/* ========================================
   优势板块
   ======================================== */
.features-section {
    background: #111111;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 40px 30px;
    background: #0a0a0a;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    border-color: #3a3a3a;
    transform: translateY(-5px);
}

.feature-number {
    font-size: 48px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 12px;
}

.feature-label {
    font-size: 14px;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.feature-text {
    font-size: 15px;
    color: #9ca3af;
}

/* ========================================
   案例展示
   ======================================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.case-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16/10;
    group: case;
}

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

.case-card:hover .case-image {
    transform: scale(1.1);
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.4s ease;
}

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

.case-category {
    font-size: 12px;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.case-title {
    font-size: 22px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 8px;
}

.case-desc {
    font-size: 14px;
    color: #9ca3af;
}

/* ========================================
   新闻列表
   ======================================== */
.news-section {
    background: #0a0a0a;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: #111111;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.news-card:hover {
    border-color: #3a3a3a;
    transform: translateY(-5px);
}

.news-image {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.news-content {
    padding: 24px;
}

.news-date {
    font-size: 13px;
    color: #6b7280;
    margin-bottom: 10px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 16px;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #ffffff;
    font-weight: 500;
}

.news-link:hover {
    gap: 12px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: #050505;
    border-top: 1px solid #1a1a1a;
    padding: 80px 40px 40px;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #111111;
    border: 1px solid #2a2a2a;
    border-radius: 50%;
    color: #9ca3af;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #ffffff;
    color: #0a0a0a;
    border-color: #ffffff;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    font-size: 14px;
    color: #9ca3af;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #ffffff;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid #1a1a1a;
}

.footer-copyright {
    font-size: 13px;
    color: #6b7280;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    font-size: 13px;
    color: #6b7280;
}

.footer-links a:hover {
    color: #9ca3af;
}

/* ========================================
   内页 Banner
   ======================================== */
.page-banner {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    padding-top: 80px;
    overflow: hidden;
}

.page-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.1;
}

.page-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 40px;
}

.page-banner-title {
    font-size: clamp(32px, 4vw, 56px);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.page-banner-crumb {
    font-size: 14px;
    color: #6b7280;
}

.page-banner-crumb a {
    color: #9ca3af;
}

.page-banner-crumb a:hover {
    color: #ffffff;
}

/* ========================================
   内容区块
   ======================================== */
.content-section {
    padding: 80px 40px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.content-card {
    background: #111111;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 30px;
    transition: all 0.3s ease;
}

.content-card:hover {
    border-color: #3a3a3a;
}

.content-card-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 20px;
}

.content-card-title {
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 12px;
}

.content-card-text {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.7;
}

/* ========================================
   关于我们
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    border-radius: 8px;
    overflow: hidden;
}

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

.about-content h3 {
    font-size: 32px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 24px;
}

.about-content p {
    font-size: 15px;
    color: #9ca3af;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: #0a0a0a;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: #6b7280;
    text-transform: uppercase;
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: #111111;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon img {
    width: 24px;
    height: 24px;
}

.contact-detail h4 {
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 8px;
}

.contact-detail p {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.6;
}

.contact-form {
    background: #111111;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: #9ca3af;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: #0a0a0a;
    border: 1px solid #2a2a2a;
    border-radius: 4px;
    color: #ffffff;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3a3a3a;
}

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

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: #0a0a0a;
        flex-direction: column;
        padding: 30px;
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-bottom: 1px solid #2a2a2a;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: 16px 20px;
        border-bottom: 1px solid #1a1a1a;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 20px;
    }
    
    .nav-container {
        padding: 0 20px;
    }
    
    .hero-content {
        padding: 0 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    
    .contact-form {
        padding: 24px;
    }
}