/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c2c2c;
    --secondary-color: #1d1d1f;
    --text-color: #1d1d1f;
    --text-secondary: #6e6e73;
    --bg-light: #f5f5f7;
    --bg-white: #ffffff;
    --border-color: #d2d2d7;
    --accent-color: #3a3a3a;
    --success-color: #4a4a4a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: none;  
    margin: 0;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 60px;
    position: relative;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
    grid-column: 1;
}

.nav-logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-logo-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: 0.3px;
    white-space: nowrap;
}

/* 如果logo图片不存在时的备用样式 */
.nav-logo-fallback {
    font-size: 20px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    padding: 8px 20px;
    border-radius: 8px;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 20px;
    grid-column: 2;
    justify-self: center;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 15px;
    padding: 10px 20px;
    border-radius: 6px;
    transition: all 0.3s;
    font-weight: 500;
}

.nav-menu a:hover {
    background-color: #1d1d1f;
    color: white;
}

.nav-menu a.active {
    background-color: #1d1d1f;
    color: white;
}

/* 下拉菜单 */
.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    min-width: 200px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    padding: 8px 0;
    margin-top: 12px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    font-size: 14px;
    border-radius: 8px;
    margin: 0 8px;
    transition: all 0.3s;
}

.dropdown-content a:hover {
    background: #6e6e73;
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    grid-column: 3;
    justify-self: end;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: 0.3s;
}

/* Hero Section 带视频背景 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 视频背景样式 */
.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: 1;
    background-color: #000;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* 视频遮罩层 */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 2;
}

/* Hero内容 */
.hero-content {
    position: relative;
    text-align: center;
    color: white;
    z-index: 3;
    width: 90%;
    max-width: 800px;
    padding: 20px;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.1;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 40px;
    font-weight: 400;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 980px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #1a1a1a;
    transform: scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--text-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}


/* 通用section样式 */
section {
    padding: 100px 0;
}

/* 产品展示区域 */
.product-showcase {
    background: linear-gradient(135deg, #f8f8f8 0%, #e0e0e0 100%);
    padding: 120px 0;
}

.product-showcase-white {
    background: white;
    padding: 120px 0;
}

.showcase-container-center {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.showcase-image-center {
    max-width: 1100px;
    width: 100%;
}

.showcase-image-center img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.showcase-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    transition: transform 0.5s ease;
}

.showcase-image:hover {
    transform: translateY(-10px) scale(1.02);
}

.showcase-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    min-height: 400px;
}

.showcase-badge {
    position: absolute;
    top: 30px;
    right: 30px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.badge-icon {
    font-size: 20px;
}

.badge-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.showcase-content {
    padding: 20px 0;
}

.showcase-tag {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.showcase-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.showcase-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.showcase-description strong {
    color: var(--text-color);
    font-weight: 600;
    font-size: 17px;
}

.showcase-features {
    list-style: none;
    margin-bottom: 40px;
}

.showcase-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 16px;
    color: var(--text-color);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.showcase-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-large {
    padding: 16px 40px;
    font-size: 17px;
    font-weight: 600;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 20px;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

/* 我们的解决方案 - 3 Cards */
.our-solution {
    background: var(--bg-white);
    padding: 100px 0;
}

.our-solution .section-title {
    margin-bottom: 15px;
}

.section-description {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.solution-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.solution-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 600;
}

.solution-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* 痛点模块 - 4 Cards */
.pain-points {
    background: var(--bg-white);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.pain-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.pain-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.pain-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.pain-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 600;
}

.pain-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* 解决方案概览 */
.solutions-overview {
    background: white;
    color: var(--text-color);
    padding: 80px 0;
}

.solutions-overview .section-title {
    color: var(--text-color);
}

.solutions-overview .section-subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    text-align: center;
    margin-top: 15px;
}

.solutions-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.solution-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.solution-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-8px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
}

.solution-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.solution-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 600;
    color: white;
}

.solution-item p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.6;
}

/* 解决方案左右布局 */
.solutions-flex-wrapper {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-top: 40px;
}

/* 动画演示区域 */
.animation-demo {
    flex: 0 0 65%;
    background: rgba(230, 235, 240, 0.95);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* 右侧文字区域 */
.solutions-text {
    flex: 1;
    padding: 20px;
}

.solutions-text .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.solutions-text .section-subtitle {
    text-align: left;
    margin-top: 0;
}

#canvas-container {
    position: relative;
    width: 100%;
    height: 500px;
    background: #e6ebf0;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#canvas-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(69, 162, 158, 0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(69, 162, 158, 0.15) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

#simCanvas {
    background: transparent;
}

/* HUD 信息面板 */
#hud {
    position: absolute;
    background: rgba(31, 40, 51, 0.95);
    border: 1px solid #45a29e;
    padding: 15px;
    border-radius: 4px;
    pointer-events: none;
    display: none;
    box-shadow: 0 0 20px rgba(69, 162, 158, 0.3);
    font-size: 13px;
    z-index: 20;
    width: 200px;
    backdrop-filter: blur(4px);
}

#hud h3 {
    margin: 0 0 10px 0;
    color: #66fcf1;
    border-bottom: 1px solid #45a29e;
    padding-bottom: 5px;
}

#hud .row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    color: #c5c6c7;
}

#hud .val {
    font-weight: bold;
    color: #fff;
    font-family: monospace;
}

/* 底部控制栏 */
#controls {
    background: #1f2833;
    padding: 15px 30px;
    border-top: 1px solid #2b3642;
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

#controls button {
    background: #2b3642;
    color: #fff;
    border: 1px solid #45a29e;
    padding: 8px 15px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    font-size: 12px;
    font-weight: bold;
}

#controls button:hover {
    background: #45a29e;
    color: #0b0c10;
    box-shadow: 0 0 8px #66fcf1;
}

/* 图片上传按钮样式 */
.upload-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.upload-wrapper input[type=file] {
    font-size: 100px;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    cursor: pointer;
}

.img-icon {
    width: 16px;
    height: 16px;
    border: 1px solid #888;
    display: inline-block;
    vertical-align: middle;
    margin-right: 5px;
    border-radius: 50%;
    background-size: cover;
    background-color: #000;
}

/* 图例 */
.legend {
    display: flex;
    gap: 15px;
    font-size: 12px;
    margin-left: auto;
    color: #888;
    align-items: center;
}

.legend .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
}

/* 视频演示 */
.video-demo {
    background: white;
    padding: 80px 0;
}

.video-demo .container {
    max-width: 1600px;
}

.demo-video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* 关键指标 - 4 Cards */
.key-metrics {
    background: var(--bg-white);
    color: var(--text-color);
}

.key-metrics .section-title {
    color: var(--text-color);
}

.key-metrics .container {
    max-width: 1600px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 50px;
    margin-top: 60px;
}

.metric-card {
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.metric-number {
    font-size: 56px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.metric-label {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-color);
}

.metric-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    flex: 1;
}

/* 工作原理 - 5 Steps + 4 Arrows */
.working-principle {
    background: var(--bg-light);
}

.working-principle .container {
    max-width: 1600px;
}

.principle-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 40px;
    margin-top: 60px;
    padding: 20px 0;
}

.principle-step {
    background: white;
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
}

.step-icon {
    font-size: 42px;
    margin-bottom: 12px;
}

.principle-step h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

.principle-step p {
    font-size: 13px;
    color: var(--text-secondary);
}

.principle-arrow {
    display: none;
}

/* 方案与型号 */
.solutions-models {
    background: var(--bg-white);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.model-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
}

.model-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.1);
}

.model-card.featured {
    background: var(--secondary-color);
    color: white;
    transform: scale(1.05);
}

.model-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 20px;
}

.model-badge.popular {
    background: var(--success-color);
}

.model-card h3 {
    font-size: 32px;
    margin-bottom: 15px;
}

.model-price {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.model-card.featured .model-price {
    color: rgba(255, 255, 255, 0.8);
}

.model-features {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
}

.model-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 15px;
}

.model-card.featured .model-features li {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.model-note {
    margin-top: 40px;
    padding: 20px 30px;
    background: rgba(69, 162, 158, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.model-note p {
    margin: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.model-note p:first-child {
    margin-top: 0;
}

.model-note p:last-child {
    margin-bottom: 0;
}

/* 案例与对比 */
.cases-comparison {
    background: var(--bg-light);
}

.comparison-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.comparison-side {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 40px;
    border-radius: 20px;
    position: relative;
}

.comparison-label {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 24px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.comparison-label.before {
    background: #ff3b30;
    color: white;
}

.comparison-label.after {
    background: var(--success-color);
    color: white;
}

.comparison-content h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.comparison-content ul {
    list-style: none;
}

.comparison-content li {
    padding: 10px 0;
    font-size: 16px;
}

.comparison-divider {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.roi-section {
    margin-top: 80px;
    text-align: center;
}

.roi-section h3 {
    font-size: 32px;
    margin-bottom: 40px;
}

.roi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.roi-item {
    background: white;
    padding: 30px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.roi-label {
    font-size: 16px;
    color: var(--text-secondary);
}

.roi-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--success-color);
}

/* 交付与服务 */
.delivery-service {
    background: var(--bg-white);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.service-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: 16px;
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

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

.footer-logo {
    margin-bottom: 15px;
}

.footer-logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    padding: 8px 0;
    font-size: 14px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1200px) and (min-width: 769px) {
    .nav-menu {
        gap: 12px;
    }

    .nav-menu a {
        font-size: 14px;
        padding: 8px 16px;
    }

    .nav-logo-text {
        font-size: 14px;
    }

    .nav-logo img {
        height: 36px;
    }

    .showcase-container {
        gap: 50px;
    }

    .showcase-title {
        font-size: 36px;
    }

    .showcase-description {
        font-size: 16px;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .showcase-container {
        gap: 40px;
    }

    .showcase-image img {
        min-height: 350px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        grid-template-columns: 1fr auto;
        padding: 0 20px;
    }

    .nav-menu {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-logo {
        grid-column: 1;
    }

    .nav-logo img {
        height: 32px;
    }

    .nav-logo-text {
        font-size: 13px;
    }

    .hero {
        height: 100vh;
        min-height: 500px;
}

    .hero-video {
        /* 在移动端确保视频覆盖 */
        min-width: 100%;
        min-height: 100%;
    }

    .hero-content h1 {
        font-size: 36px;
}

    .hero-content p {
    font-size: 18px;
    }

    .section-title {
        font-size: 32px;
}

    .cta-buttons {
        flex-direction: column;
    }

    /* 产品展示响应式 */
    .product-showcase {
        padding: 60px 0;
    }

    .showcase-container {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 20px;
    }

    .showcase-image {
        order: 1;
    }

    .showcase-content {
        order: 2;
        padding: 0;
    }

    .showcase-title {
        font-size: 28px;
    }

    .showcase-description {
        font-size: 16px;
    }

    .showcase-features li {
        font-size: 15px;
    }

    .showcase-cta {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
        text-align: center;
    }

    .principle-flow {
        flex-direction: column;
        gap: 10px;
}

    .principle-arrow {
        transform: rotate(90deg);
    }

    .principle-step {
        max-width: 100%;
        width: 100%;
}

    .solution-grid,
    .pain-grid,
    .metrics-grid,
    .principle-flow,
    .service-grid,
    .roi-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .key-metrics .container {
        max-width: 1600px;
}

    .working-principle .container {
        max-width: 1600px;
}

    .section-description {
        font-size: 16px;
        padding: 0 20px;
    }
}

/* 照片集样式 */
.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15) !important;
}

.gallery-item img {
    transition: transform 0.3s ease;
}

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

/* AI Studio 风格：热点标签（用于图片图集的悬停提示） */
.ai-hotspot {
    position: absolute;
    cursor: pointer;
    border: 4px solid rgba(255, 255, 255, 0.85);
    border-radius: 50%;
    transition: all 0.25s ease;
    z-index: 10;
    box-shadow:
        0 0 0 2px rgba(0, 0, 0, 0.35),
        0 0 18px rgba(255, 255, 255, 0.55);
}

.ai-hotspot:hover {
    border-color: #fff;
    box-shadow:
        0 0 0 2px rgba(0, 0, 0, 0.35),
        0 0 26px rgba(255, 255, 255, 0.85);
    background-color: rgba(255, 255, 255, 0.18);
}

.ai-hotspot.cast { border-color: #45b5ff; }    /* 铸铝 - 更亮蓝 */
.ai-hotspot.wrought { border-color: #3dff9a; } /* 变形铝 - 更亮绿 */
.ai-hotspot.other { border-color: #ff4d4d; }   /* 杂质 - 更亮红 */

.ai-tooltip {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    width: 240px;
    background-color: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 12px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
    text-align: left;
    transition: opacity 0.25s ease, bottom 0.25s ease;
    pointer-events: none;
    z-index: 20;
}

.ai-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -6px;
    border-width: 6px;
    border-style: solid;
    border-color: rgba(0, 0, 0, 0.85) transparent transparent transparent;
}

.ai-hotspot:hover .ai-tooltip {
    visibility: visible;
    opacity: 1;
    bottom: 110%;
}

.ai-tooltip strong {
    display: block;
    margin-bottom: 6px;
    font-size: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
    padding-bottom: 4px;
}

.ai-price-tag {
    color: #f1c40f;
    font-weight: 700;
}

/* =================== 设计宣传照片栏目 =================== */
.design-photos {
    position: relative;
}

.design-grid {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.design-card {
    cursor: pointer;
    position: relative;
}

.design-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(102, 252, 241, 0.2) !important;
}

.design-card img {
    transition: transform 0.5s ease;
}

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

/* 响应式调整 */
@media (max-width: 1200px) {
    .design-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 25px !important;
    }
    
    .design-card img {
        height: 350px !important;
    }
}

@media (max-width: 768px) {
    .design-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }
    
    .design-card img {
        height: 300px !important;
    }
}