/* ========================================
   AMJ 艾美家官网 - 主样式表
   设计风格：简洁、高级、现代
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #5B4A7C;
    --primary-dark: #3D2B5E;
    --primary-light: #7B6A9C;
    --accent-color: #9D8CFF;
    --text-dark: #1A1A2E;
    --text-medium: #4A4A5A;
    --text-light: #6A6A7A;
    --bg-white: #FFFFFF;
    --bg-light: #F8F7FC;
    --bg-cream: #FAF9F6;
    --border-light: rgba(0,0,0,0.08);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: var(--transition-normal);
}

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

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    transition: var(--transition-fast);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

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

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

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

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition-fast);
}

/* ========================================
   Hero Section - 视频全屏
   ======================================== */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 100vh;
    overflow: hidden;
}

.video-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(61, 43, 94, 0.3) 0%,
        rgba(61, 43, 94, 0.2) 50%,
        rgba(91, 74, 124, 0.1) 100%
    );
}

.hero-content {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    z-index: 10;
    width: 90%;
    max-width: 800px;
}

.hero-tagline {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
    opacity: 1;
    background: rgba(107, 91, 149, 0.9);
    display: inline-block;
    padding: 8px 20px;
    border-radius: 30px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 400;
    margin-bottom: 12px;
    opacity: 1;
}

.hero-desc {
    font-size: 14px;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 24px;
}
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 30px;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: var(--primary-dark);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: white;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse {
    display: block;
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 20px;
    position: relative;
}

.wheel {
    display: block;
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header.light {
    color: white;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.section-header.light .section-tag {
    color: rgba(255,255,255,0.7);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-header.light .section-title {
    color: white;
}

.section-desc {
    font-size: 18px;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

.section-header.light .section-desc {
    color: rgba(255,255,255,0.8);
}

/* ========================================
   Products Section
   ======================================== */
.products-section {
    padding: 120px 0;
    background: var(--bg-light);
}

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

@media (max-width: 992px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-link-wrapper {
    display: block;
}

.product-image-wrapper {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f3f8 0%, #ebe7f2 100%);
}

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

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

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: var(--primary-color);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    z-index: 2;
}

.product-badge.new {
    background: #E74C3C;
}

.product-info {
    padding: 24px;
}

.product-series {
    display: block;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.product-name {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.product-brief {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    padding: 6px 12px;
    background: var(--bg-light);
    color: var(--text-medium);
    font-size: 12px;
    border-radius: 20px;
    border: 1px solid var(--border-light);
}

.view-detail {
    display: inline-flex;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.product-card:hover .view-detail {
    color: var(--primary-dark);
}

/* ========================================
   Technology Section
   ======================================== */
.technology-section {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
}

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

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

.tech-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    color: white;
    transition: var(--transition-normal);
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
}

.tech-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    color: rgba(255,255,255,0.9);
}

.tech-icon svg {
    width: 100%;
    height: 100%;
}

.tech-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.tech-card p {
    font-size: 15px;
    line-height: 1.7;
    opacity: 0.85;
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    padding: 120px 0;
    background: var(--bg-white);
}

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

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.about-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--primary-color);
    margin: 20px 0 24px;
}

.about-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-medium);
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.about-image {
    position: relative;
}

.image-wrapper {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #f0eef5 0%, #e8e4f0 100%);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.floating-elements {
    position: absolute;
    inset: 0;
}

.floating-elements::before,
.floating-elements::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
}

.floating-elements::before {
    width: 200px;
    height: 200px;
    background: var(--accent-color);
    top: 20%;
    left: 20%;
    animation: float 6s ease-in-out infinite;
}

.floating-elements::after {
    width: 150px;
    height: 150px;
    background: var(--primary-light);
    bottom: 20%;
    right: 20%;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
    padding: 120px 0;
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

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

.contact-item {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-light);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo {
    height: 40px;
    width: auto;
}

.footer-brand p {
    font-size: 14px;
    opacity: 0.7;
}

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

.footer-links a {
    font-size: 14px;
    opacity: 0.8;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    font-size: 13px;
    opacity: 0.6;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .navbar .container {
        height: 70px;
    }

    .logo-img {
        height: 32px;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-section {
        min-height: 600px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 200px;
    }

    .products-section,
    .technology-section,
    .about-section,
    .contact-section {
        padding: 80px 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-header {
        margin-bottom: 40px;
    }
}

/* ========================================
   Product Detail Pages
   ======================================== */
.page-header {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    text-align: center;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.85;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 30px;
    font-size: 14px;
}

.breadcrumb a {
    opacity: 0.7;
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    opacity: 1;
}

.breadcrumb span {
    opacity: 0.5;
}

.product-detail-section {
    padding: 80px 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

@media (max-width: 768px) {
    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.product-main-image {
    aspect-ratio: 4/3;
    background: var(--bg-light);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 20px;
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-thumbnails {
    display: flex;
    gap: 12px;
}

.product-thumbnail {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
}

.product-thumbnail.active,
.product-thumbnail:hover {
    border-color: var(--primary-color);
}

.product-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail-info {
    padding-top: 20px;
}

.product-detail-series {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.product-detail-name {
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.3;
}

.product-detail-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-medium);
    margin-bottom: 30px;
}

.product-features-list {
    margin-bottom: 40px;
}

.product-features-list h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.product-features-list ul {
    list-style: none;
}

.product-features-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-medium);
}

.product-features-list li::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 12px;
    flex-shrink: 0;
    margin-top: 2px;
}

.product-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.product-specs {
    padding: 80px 0;
    background: var(--bg-light);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

@media (max-width: 992px) {
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .specs-grid {
        grid-template-columns: 1fr;
    }
}

.spec-item {
    background: white;
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.spec-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.spec-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.related-products {
    padding: 80px 0;
}

.related-products .section-title {
    text-align: center;
    margin-bottom: 40px;
}