/* ===== 基础样式重置和变量 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色系统 - 深色主题 */
    --primary-color: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --background: #0f172a;
    --background-alt: #1e293b;
    --background-light: #f8fafc;
    --background-dark: #020617;
    --text-primary-light: #111827;
    --text-secondary-light: #6b7280;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* 动画时长 */
    --transition-fast: 0.2s;
    --transition-medium: 0.3s;
    --transition-slow: 0.5s;

    /* 流式字体系统 - 移动端响应式字号 */
    --fluid-min-width: 375;
    --fluid-max-width: 768;
    --fluid-screen: 100vw;
    --fluid-bp: calc(
        (var(--fluid-screen) - var(--fluid-min-width) / 16 * 1rem) /
        (var(--fluid-max-width) - var(--fluid-min-width))
    );
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
}

/* ===== 通用工具类 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: clamp(1.5rem, 1.75rem + var(--fluid-bp) * 0.5rem, 2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    word-break: keep-all;
    overflow-wrap: break-word;
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-medium) ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-medium) ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* 导航栏Logo */
.nav-logo {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo-img {
    height: 40px;
    width: auto;
    transition: all var(--transition-medium) ease;
}

.nav-logo-img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 25px;
    transition: all var(--transition-medium) ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(139, 92, 246, 0.2);
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-medium) ease;
}

/* ===== 英雄区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: transparent;
    overflow: hidden;
}

.hero-main-image {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-visual {
    height: 60vh;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    opacity: 0;
    animation: fadeInScale 1.2s ease 0.5s forwards;
}

/* 全屏视差背景系统 */
.parallax-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: #1a1f28;
}

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

.parallax-layer.active {
    opacity: 1;
}

.parallax-layer:nth-child(1) { background-image: url('assets/images/a.jpg'); }
.parallax-layer:nth-child(2) { background-image: url('assets/images/b.jpg'); }
.parallax-layer:nth-child(3) { background-image: url('assets/images/c.jpg'); }
.parallax-layer:nth-child(4) { background-image: url('assets/images/d.jpg'); }
.parallax-layer:nth-child(5) { background-image: url('assets/images/e.jpg'); }

.hero-background {
    display: none;
}

.hero-video-overlay {
    display: none;
}

.hero-content {
    position: relative;
    width: 100%;
    height: 100vh;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-text {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    max-width: 50%;
}

.hero-title {
    font-size: clamp(1.75rem, 2.25rem + var(--fluid-bp) * 1rem, 2.5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    word-break: keep-all;
    overflow-wrap: break-word;
    text-align: center;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.title-highlight {
    display: block;
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.2s forwards;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.4s forwards;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffd700;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease 0.8s forwards;
}

.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 80vh;
    width: 50%;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-cards {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    pointer-events: none;
}

.floating-cards .card {
    pointer-events: auto;
}

.card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: var(--spacing-md);
    color: white;
    font-weight: 500;
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    right: 40%;
    animation-delay: 0s;
}

.card-2 {
    top: 45%;
    right: 8%;
    animation-delay: 1.5s;
}

.card-3 {
    bottom: 30%;
    right: 25%;
    animation-delay: 3s;
}

.card-4 {
    top: 12%;
    right: 15%;
    animation-delay: 4.5s;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    opacity: 0;
    animation: fadeInUp 1s ease 1s forwards;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    margin: var(--spacing-xs) auto 0;
    animation: bounce 2s ease-in-out infinite;
}

/* ===== 项目介绍 ===== */
.about {
    padding: var(--spacing-3xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.about-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium) ease;
    backdrop-filter: blur(10px);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(139, 92, 246, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 课程体系 ===== */
.curriculum {
    padding: var(--spacing-3xl) 0;
}

.phase-section {
    margin-bottom: var(--spacing-3xl);
}

.phase-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.9) 0%, rgba(16, 185, 129, 0.9) 100%), url('assets/images/giphy.gif');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    border-radius: 20px;
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 120px;
}

.phase-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(6, 182, 212, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    z-index: 1;
}

.phase-header > * {
    position: relative;
    z-index: 2;
}

.phase-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.phase-info {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.phase-duration,
.phase-hours {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
}

.modules-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.module-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.4) 100%);
    border: none;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    backdrop-filter: blur(20px);
    transition: all var(--transition-medium) ease;
    position: relative;
    overflow: hidden;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-slow) ease;
}

.module-card:hover::before {
    left: 100%;
}

.module-card:hover {
    transform: translateY(-8px);
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.6) 100%);
    border-top-color: rgba(139, 92, 246, 0.3);
    border-bottom-color: rgba(139, 92, 246, 0.3);
}

.module-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
    align-items: center;
}

.module-card.reverse .module-content {
    grid-template-columns: 300px 1fr;
}

.module-number {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.module-title {
    font-size: clamp(1.125rem, 1.25rem + var(--fluid-bp) * 0.25rem, 1.375rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.5em;
    word-break: keep-all;
    overflow-wrap: break-word;
    line-height: 1.3;
}

.module-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.module-duration,
.module-teacher {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.module-teacher {
    font-weight: 600;
    color: var(--primary-color);
}

.module-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.module-visual {
    position: relative;
}

.image-placeholder {
    background: var(--gradient-secondary);
    border-radius: 15px;
    padding: var(--spacing-xl);
    color: white;
    text-align: center;
    font-weight: 500;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.module-image {
    max-width: 100%;
    height: auto;
    max-height: 250px;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
    transition: all var(--transition-medium) ease;
}

.module-card:hover .module-image {
    transform: scale(1.05);
    filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.4));
}

.module-summary {
    margin-top: var(--spacing-xl);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.summary-item {
    background: rgba(99, 102, 241, 0.05);
    border-radius: 15px;
    padding: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
}

.summary-item h5 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.summary-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== 师资团队 ===== */
.faculty {
    padding: var(--spacing-3xl) 0;
    background: var(--background-light);
}

.faculty-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.faculty-intro-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary-light);
}

.faculty-intro-subtitle {
    font-size: 1rem;
    color: var(--text-secondary-light);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.faculty-description {
    font-size: 1.125rem;
    color: var(--text-secondary-light);
    line-height: 1.7;
}

.faculty-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

.faculty-card {
    background: white;
    border-radius: 20px;
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium) ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.faculty-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.05), transparent);
    transition: left var(--transition-slow) ease;
}

.faculty-card:hover::before {
    left: 100%;
}

.faculty-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.faculty-avatar {
    margin-bottom: var(--spacing-md);
}

.avatar-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto;
    display: block;
    box-shadow: var(--shadow-md);
    object-fit: cover;
    border: 3px solid var(--primary-color);
    transition: all var(--transition-medium) ease;
}

.faculty-card:hover .avatar-image {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
}

.faculty-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary-light);
}

.faculty-title {
    font-size: 0.95rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.faculty-experience {
    font-size: 0.875rem;
    color: var(--text-secondary-light);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.faculty-achievements {
    border-top: 2px solid rgba(139, 92, 246, 0.1);
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    flex: 1;
}

.faculty-achievements p {
    color: var(--text-secondary-light);
    line-height: 1.5;
    margin: 0;
    font-size: 0.8rem;
    text-align: left;
}

/* ===== 案例与作品 ===== */
.portfolio {
    padding: var(--spacing-3xl) 0;
    background: var(--background-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-item {
    background: white;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-medium) ease;
    position: relative;
    overflow: hidden;
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* 视频容器样式 */
.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    overflow: hidden;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: all var(--transition-medium) ease;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-medium) ease;
    opacity: 0.8;
}

.video-container:hover .video-play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.video-container:hover .portfolio-video {
    transform: scale(1.05);
}

/* 内容信息样式 */
.portfolio-info {
    padding: var(--spacing-lg);
    background: white;
}

.portfolio-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary-light);
    line-height: 1.3;
}

.portfolio-info p {
    color: var(--text-secondary-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* 通用性媒体容器 - 为未来扩展准备 */
.media-container {
    position: relative;
    width: 100%;
    background: #f8f9fa;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 自适应不同宽高比 */
.media-container.ratio-16-9 { aspect-ratio: 16/9; }
.media-container.ratio-4-3 { aspect-ratio: 4/3; }
.media-container.ratio-1-1 { aspect-ratio: 1/1; }
.media-container.ratio-3-4 { aspect-ratio: 3/4; }
.media-container.ratio-auto { height: auto; min-height: 200px; }

/* 媒体元素通用样式 */
.media-container img,
.media-container video,
.media-container iframe {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-medium) ease;
}

.media-container:hover img,
.media-container:hover video {
    transform: scale(1.05);
}

/* PDF 预览样式 */
.pdf-container {
    position: relative;
    background: white;
    border: 1px solid #e5e7eb;
}

.pdf-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: white;
}

.pdf-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-medium) ease;
}

.pdf-container:hover .pdf-overlay {
    opacity: 1;
}

.pdf-icon {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #dc2626;
    font-size: 24px;
    font-weight: bold;
}

/* ===== 行业拓展 ===== */
.industry {
    padding: var(--spacing-3xl) 0;
    background: var(--background-light);
}

.industry-services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.service-item {
    background: white;
    border-radius: 20px;
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium) ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary-light);
}

.service-item p {
    color: var(--text-secondary-light);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ===== 高薪就业 ===== */
.jobs {
    padding: var(--spacing-3xl) 0;
    background: var(--background);
}

.jobs-overview {
    margin-bottom: var(--spacing-3xl);
}

.jobs-intro-content {
    max-width: 1000px;
    margin: 0 auto;
}

.salary-highlight {
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.salary-highlight h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.salary-range {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 50%, #ff6b35 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.3);
}

.salary-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.market-insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.insight-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: var(--spacing-xl);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-medium) ease;
    position: relative;
    overflow: hidden;
}

.insight-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.05), transparent);
    transition: left var(--transition-slow) ease;
}

.insight-item:hover::before {
    left: 100%;
}

.insight-item:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.2);
    background: rgba(255, 255, 255, 0.06);
}

.insight-icon {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    border-radius: 15px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.insight-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.insight-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.jobs-showcase {
    margin-top: var(--spacing-3xl);
}

.showcase-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.positions-carousel {
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    padding: var(--spacing-lg) 0;
}

.positions-track {
    display: flex;
    gap: var(--spacing-lg);
    animation: slideLeft 30s linear infinite;
    will-change: transform;
    cursor: grab;
}

.positions-track:hover {
    animation-play-state: paused;
}

.positions-track.dragging {
    animation-play-state: paused;
    cursor: grabbing;
}

@keyframes slideLeft {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.position-item {
    flex-shrink: 0;
    width: 320px;
    position: relative;
    transition: all var(--transition-medium) ease;
}

.position-item:hover {
    transform: translateY(-8px) scale(1.03);
}

.position-screenshot {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-medium) ease;
    object-fit: contain;
    background: white;
}

.position-item:hover .position-screenshot {
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.market-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.5;
    background: rgba(255, 255, 255, 0.02);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

/* 页脚Logo */
.footer-logo {
    margin-bottom: var(--spacing-sm);
}

.footer-logo-img {
    height: 35px;
    width: auto;
    transition: all var(--transition-medium) ease;
}

.footer-logo-img:hover {
    transform: scale(1.05);
}

.footer-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-medium) ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

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

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

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* AOS 动画增强 */
[data-aos] {
    transition-property: transform, opacity;
    transition-duration: 0.6s;
    transition-timing-function: ease-out;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
    opacity: 0;
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
    opacity: 0;
}

[data-aos="fade-left"] {
    transform: translateX(30px);
    opacity: 0;
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
    opacity: 0;
}

[data-aos].aos-animate {
    transform: translate(0);
    opacity: 1;
}

/* ===== 响应式设计 ===== */
/* 桌面端 - 确保标题字号正常 */
@media (min-width: 769px) {
    .hero-title {
        font-size: 3.5rem !important; /* 桌面端使用大字号 */
    }
}

@media (max-width: 1024px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-text {
        max-width: 60%;
    }
    
    .hero-visual {
        width: 40%;
        right: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .main-visual {
        height: 50vh;
        max-width: 100%;
    }
    
    .module-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .module-card.reverse .module-content {
        grid-template-columns: 1fr;
    }
    
    .phase-header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    /* 防止横向滚动 */
    html, body {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
    }

    .hero, .about, .faculty, .curriculum, .portfolio, .jobs, .footer {
        overflow-x: hidden;
        max-width: 100vw;
    }

    .nav-container {
        justify-content: space-between;
    }

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

    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hero {
        min-height: 75vh; /* 从100vh改为75vh */
        padding-top: 80px; /* 增加顶部间距，从60px改为80px */
    }

    .hero-content {
        padding: var(--spacing-lg) 0; /* 增加上下间距 */
    }

    .hero-text {
        max-width: 100%;
        position: static;
        transform: none;
        margin-bottom: var(--spacing-md);
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .hero-visual {
        position: static;
        transform: none;
        width: 100%;
        height: 35vh;
        margin-top: var(--spacing-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .main-visual {
        height: 30vh;
        max-width: 90%;
    }

    .hero-stats {
        flex-direction: row; /* 改为横向排列 */
        justify-content: space-around;
        gap: var(--spacing-md);
        margin: var(--spacing-md) 0;
    }

    .stat-number {
        font-size: 1.5rem; /* 从2.5rem缩小到1.5rem */
    }

    .stat-label {
        font-size: 0.75rem; /* 从0.875rem缩小 */
    }

    /* 移动端完全隐藏关键词 */
    .floating-cards {
        display: none !important;
    }

    .card:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: rgba(139, 92, 246, 0.4);
        transform: translateY(-2px);
    }

    /* 移除浮动定位 */
    .card-1, .card-2, .card-3, .card-4 {
        top: auto;
        right: auto;
        bottom: auto;
        left: auto;
        animation: none;
    }

    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .portfolio-grid,
    .industry-services,
    .market-insights {
        grid-template-columns: 1fr;
    }

    /* 价值主张2×2网格，避免全部垂直堆叠 */
    .about-grid {
        grid-template-columns: 1fr 1fr; /* 保持2列 */
        gap: var(--spacing-md);
    }

    .about-card {
        padding: var(--spacing-md); /* 从xl缩小到md */
        text-align: center;
    }

    .card-icon {
        font-size: 1.5rem; /* 稍微缩小图标 */
        margin-bottom: var(--spacing-sm);
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .faculty-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .phase-info {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-logo-img {
        height: 30px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .salary-range {
        font-size: 2rem;
    }
    
    .insight-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .insight-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }
    
    .showcase-title {
        font-size: 1.5rem;
    }
    
    .position-item {
        width: 280px;
    }
}

@media (max-width: 480px) {
    /* 防止横向滚动 */
    html, body {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
    }

    .hero, .about, .faculty, .curriculum, .portfolio, .jobs, .footer {
        overflow-x: hidden;
        max-width: 100vw;
    }

    :root {
        --spacing-xs: 0.375rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        min-height: 70vh; /* 进一步缩小 */
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .hero-stats {
        gap: var(--spacing-sm);
    }

    .stat-number {
        font-size: 1.25rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    /* 同样隐藏小屏幕的滚动指示器 */
    .scroll-indicator {
        display: none !important;
    }

    /* 小屏幕单列 */
    .about-grid {
        grid-template-columns: 1fr; /* 超小屏幕单列 */
    }

    .about-card {
        padding: var(--spacing-sm);
    }

    .card-icon {
        font-size: 1.25rem;
    }

    /* 课程模块统一布局 */
    .module-content {
        grid-template-columns: 1fr; /* 移动端单列布局 */
        gap: var(--spacing-md);
    }

    /* 移除reverse效果，统一布局 */
    .module-card.reverse .module-content {
        grid-template-columns: 1fr;
    }

    /* 统一顺序：图片在上 */
    .module-visual {
        order: -1; /* 强制图片在上 */
    }

    .module-image {
        max-height: 200px; /* 限制图片高度 */
    }

    .module-card,
    .about-card,
    .faculty-card,
    .service-item,
    .salary-highlight,
    .insight-item {
        padding: var(--spacing-md);
    }
    
    .faculty-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .faculty-card {
        min-height: auto;
    }
    
    .salary-range {
        font-size: 1.75rem;
    }
    
    .showcase-title {
        font-size: 1.25rem;
    }
    
    .position-item {
        width: 240px;
    }

    .positions-carousel {
        padding: var(--spacing-md) 0;
    }

    /* 简化的图片展示 - 统一处理所有图片 */
    .work-slide {
        min-width: 100%;
        width: 100%;
        flex-shrink: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0 var(--spacing-md); /* 为大图添加内边距 */
        box-sizing: border-box;
    }

    .work-image {
        max-width: 100%; /* 确保不超出容器 */
        max-height: 400px;
        width: auto;
        height: auto;
        object-fit: contain;
        border-radius: 8px;
        box-shadow: var(--shadow-lg);
        transition: all var(--transition-medium) ease;
        cursor: pointer;
        display: block; /* 避免图片下方有空隙 */
    }

    .work-image:hover {
        transform: scale(1.02);
        box-shadow: var(--shadow-xl);
    }

    /* 隐藏所有左右按钮 */
    .carousel-btn {
        display: none !important;
    }

    .carousel-indicators {
        display: flex !important;
        justify-content: center;
        gap: var(--spacing-xs);
        margin-top: var(--spacing-md);
    }

    /* 指示器样式优化 */
    .indicator {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        cursor: pointer;
        padding: 0;
    }

    .indicator::after {
        content: '';
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.3);
        transition: all 0.3s ease;
    }

    .indicator.active::after {
        background: var(--primary-color);
        transform: scale(1.2);
    }

    /* 轮播触摸滑动优化 */
    .carousel-track {
        touch-action: pan-y; /* 只允许垂直滚动，水平由JS控制 */
        will-change: transform;
        gap: 0 !important; /* 移除gap，避免右移 */
    }

    .work-slide {
        min-width: 100%;
        flex-shrink: 0; /* 防止压缩 */
    }

    /* 隐藏移动端滚动指示器 */
    .scroll-indicator {
        display: none;
    }
}

/* ===== 作品轮播展示样式 ===== */
.works-carousel {
    margin: var(--spacing-3xl) 0;
    position: relative;
}

.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.03) 0%, rgba(59, 130, 246, 0.03) 100%);
    border-radius: 15px;
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.carousel-track-container {
    overflow: hidden;
    flex: 1;
    margin: 0 var(--spacing-lg);
    border-radius: 10px;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease;
    gap: var(--spacing-md);
}

.work-slide {
    min-width: 100%;
    width: 100%;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 var(--spacing-lg); /* 桌面端更大内边距 */
    box-sizing: border-box;
}

/* 多图并排展示样式 */
.multi-image .work-slide-group {
    min-width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.work-item-multi {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 300px;
}

.multi-image .work-image {
    max-height: 350px;
    max-width: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-medium) ease;
    cursor: pointer;
}

.work-image {
    max-width: 100%; /* 确保不超出容器 */
    max-height: 400px;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 0;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-medium) ease;
    cursor: pointer;
}

.work-image:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    filter: brightness(1.05);
}

.carousel-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all var(--transition-medium) ease;
    backdrop-filter: blur(10px);
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.carousel-btn:active {
    transform: scale(0.95);
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all var(--transition-medium) ease;
}

.indicator.active {
    background: var(--primary-color);
    transform: scale(1.2);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.6);
    transform: scale(1.1);
}

/* 灯箱效果 */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    animation: lightboxFadeIn 0.3s ease;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    animation: lightboxImageIn 0.4s ease;
}

.lightbox-close {
    position: absolute;
    top: -15px;
    right: -15px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium) ease;
    box-shadow: var(--shadow-lg);
}

.lightbox-close:hover {
    background: white;
    transform: scale(1.1);
}

@keyframes lightboxFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes lightboxImageIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 自动播放动画暂停状态 */
.carousel-container:hover .carousel-track {
    animation-play-state: paused;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .carousel-container {
        padding: var(--spacing-md);
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .work-image {
        max-height: 300px;
    }
    
    .multi-image .work-slide-group {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .multi-image .work-image {
        max-height: 250px;
    }
    
    .work-item-multi {
        max-width: 100%;
    }
    
    .lightbox-close {
        top: -10px;
        right: -10px;
        width: 35px;
        height: 35px;
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .carousel-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .carousel-track-container {
        margin: 0;
        order: 1;
    }
    
    .prev-btn {
        order: 0;
    }
    
    .next-btn {
        order: 2;
    }
    
    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
    
    .work-image {
        max-height: 250px;
        max-width: 95%;
    }
    
    .multi-image .work-slide-group {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .multi-image .work-image {
        max-height: 200px;
    }
}

/* ===== 性能优化 ===== */
.hero-background,
.hero-visual,
.floating-cards {
    will-change: transform;
}

.module-card,
.about-card,
.faculty-card,
.portfolio-item,
.service-item,
.insight-item,
.position-item,
.positions-track,
.work-slide,
.works-carousel,
.carousel-track {
    will-change: transform;
}

/* ===== 可访问性 ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-arrow {
        animation: none;
    }
    
    .floating-cards .card {
        animation: none;
    }
    
    .positions-track {
        animation: none;
    }
}