/* 全局样式 */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --dark-secondary: #1e293b;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    padding-top: 76px;
    overflow-x: hidden;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-secondary) 100%) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    font-weight: 500;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero 区域 */
.hero-section {
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=futuristic%20AI%20technology%20background%2C%20digital%20art%2C%20purple%20and%20blue%20gradient%2C%20creative%20visuals%2C%20high%20quality&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 100%);
    z-index: 0;
}

.hero-section .hero-pattern {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.05) 75%, transparent 75%, transparent);
    background-size: 50px 50px;
    animation: move 20s linear infinite;
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
    padding: 4rem 0;
}

@keyframes move {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-gradient:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
}

/* 特性卡片 */
.feature-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.feature-description {
    color: var(--text-muted);
    line-height: 1.8;
}

/* 作品展示 */
.work-card {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

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

.work-img {
    height: 250px;
    object-fit: cover;
    width: 100%;
}

.work-overlay {
    padding: 1.5rem;
    background: white;
}

.work-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark-bg);
}

.work-category {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.work-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 统计数字 */
.stat-card {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

.footer h5 {
    color: var(--text-light);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.footer a {
    transition: all 0.3s ease;
    text-decoration: none;
}

.footer a:hover {
    color: var(--primary-color) !important;
}

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

.animate-on-scroll {
    animation: fadeInUp 0.8s ease forwards;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .feature-card {
        margin-bottom: 2rem;
    }
}

/* 关于我们页面 */
.about-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.team-card {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

/* 联系表单 */
.contact-form {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-control {
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    border: 2px solid #e2e8f0;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 服务卡片 */
.service-card {
    background: linear-gradient(135deg, var(--dark-bg), var(--dark-secondary));
    color: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.service-description {
    color: var(--text-muted);
    line-height: 1.8;
}

/* 宣传大使样式 */
.ambassador-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.ambassador-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 50%;
    height: 200%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    transform: rotate(15deg);
    z-index: 0;
}

.ambassador-section .container {
    position: relative;
    z-index: 1;
}

.ambassador-img {
    max-height: 650px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
    border: 6px solid rgba(255,255,255,0.9);
    transition: all 0.4s ease;
    transform: perspective(1000px) rotateY(5deg);
}

.ambassador-img:hover {
    transform: perspective(1000px) rotateY(0deg) translateY(-15px);
    box-shadow: 0 35px 60px rgba(0,0,0,0.35);
}

.ambassador-quote {
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.6;
    color: var(--dark-bg);
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 2rem 0;
    position: relative;
}

.ambassador-quote::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: -15px;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.ambassador-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* 图片墙样式 */
.gallery-section {
    padding: 5rem 0;
    background: var(--dark-bg);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: all 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.8) 100%);
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: all 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-title {
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
}

.gallery-category {
    color: var(--accent-color);
    font-size: 0.9rem;
}

/* 短视频展示 */
.video-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.video-thumbnail {
    position: relative;
    height: 280px;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

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

.video-card:hover .video-thumbnail img {
    transform: scale(1.1);
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.video-card:hover .video-play-btn {
    background: var(--primary-color);
    color: white;
    transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
    padding: 1.5rem;
    background: white;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark-bg);
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}