/* ========================================
   Index CSS - 首页专属样式
   ======================================== */

/* === Hero Banner === */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

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

.hero-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.35), rgba(0,0,0,0.2));
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    text-align: center;
    color: var(--color-white);
    width: 100%;
    max-width: 900px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 5.6rem;
    font-weight: 300;
    letter-spacing: 12px;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

.hero-content .hero-subtitle {
    font-size: 2rem;
    letter-spacing: 6px;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.6s;
}

.hero-content .hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.9s;
}

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

/* Hero Navigation Arrows */
.hero-arrow {
    position: absolute;
    top: 50%;
    z-index: 10;
    width: 48px;
    height: 48px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
    transform: translateY(-50%);
}

.hero-arrow:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--color-white);
}

.hero-arrow.prev {
    left: 40px;
}

.hero-arrow.next {
    right: 40px;
}

/* Hero Dots */
.hero-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 12px;
}

.hero-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: var(--transition);
}

.hero-dots .dot.active {
    background: var(--color-white);
    border-color: var(--color-white);
}

/* === About Section === */
.about-section {
    padding: 100px 0;
    background: var(--color-white);
}

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

.about-image {
    position: relative;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: 4px;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent);
    border-radius: 4px;
    z-index: -1;
}

.about-text .about-label {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--color-accent);
    letter-spacing: 4px;
    margin-bottom: 12px;
    display: block;
}

.about-text h2 {
    font-size: 3.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.about-text p {
    font-size: 1.5rem;
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 40px 0;
}

.about-stats .stat-item {
    text-align: center;
    padding: 24px 16px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: var(--transition);
}

.about-stats .stat-item:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.about-stats .stat-number {
    font-size: 3.6rem;
    font-weight: 700;
    color: var(--color-accent);
    font-family: var(--font-heading);
}

.about-stats .stat-label {
    font-size: 1.3rem;
    color: var(--color-text-lighter);
    margin-top: 8px;
}

/* === Products Section === */
.products-section {
    padding: 100px 0;
    background: var(--color-gray);
}

.product-series {
    margin-bottom: 80px;
}

.product-series:last-child {
    margin-bottom: 0;
}

.series-header {
    text-align: center;
    margin-bottom: 40px;
}

.series-header h3 {
    font-size: 2.4rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.series-header .series-desc {
    font-size: 1.4rem;
    color: var(--color-text-lighter);
    letter-spacing: 2px;
}

/* === Cases Section === */
.cases-section {
    padding: 100px 0;
    background: var(--color-white);
}

.case-filter {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.case-filter .filter-btn {
    padding: 10px 28px;
    font-size: 1.4rem;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
}

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

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

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

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.case-item:hover img {
    transform: scale(1.08);
}

.case-item .case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: var(--color-white);
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

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

.case-item .case-overlay h4 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.case-item .case-overlay span {
    font-size: 1.2rem;
    opacity: 0.8;
}

.view-more-wrap {
    text-align: center;
    margin-top: 50px;
}

/* === News Section === */
.news-section {
    padding: 100px 0;
    background: var(--color-gray);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--color-white);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.news-card .news-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-card .news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.news-card .news-info {
    padding: 24px;
}

.news-card .news-info .news-date {
    font-size: 1.2rem;
    color: var(--color-text-lighter);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-card .news-info h4 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .news-info p {
    font-size: 1.3rem;
    color: var(--color-text-lighter);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === Contact Section === */
.contact-section {
    padding: 100px 0;
    background: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form {
    padding: 40px;
    background: var(--color-gray);
    border-radius: 4px;
}

.contact-form h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--color-primary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 1.4rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    font-size: 1.4rem;
    color: var(--color-text);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-info {
    padding: 40px 0;
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--color-primary);
}

.contact-info .info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}

.contact-info .info-item .info-icon {
    width: 44px;
    height: 44px;
    background: var(--color-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 1.6rem;
    flex-shrink: 0;
}

.contact-info .info-item .info-text h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.contact-info .info-item .info-text p {
    font-size: 1.4rem;
    color: var(--color-text-light);
    line-height: 1.6;
}