/* 全局样式和变量 */
:root {
    --primary-color: #3f9fff;
    --secondary-color: #7c4dff;
    --accent-color: #00d6ff;
    --dark-color: #0a1929;
    --light-color: #f8fbff;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
nav {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

nav.scrolled {
    background-color: rgba(255, 255, 255, 1);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.search-container {
    display: flex;
    align-items: center;
    background-color: #f5f7fa;
    border-radius: 30px;
    padding: 8px 15px;
    transition: var(--transition);
}

.search-container:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.search-container input {
    border: none;
    background: transparent;
    outline: none;
    padding: 5px 10px;
    width: 200px;
}

.search-container button {
    border: none;
    background: transparent;
    color: var(--text-lighter);
    cursor: pointer;
    transition: var(--transition);
}

.search-container button:hover {
    color: var(--primary-color);
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fbff 0%, #e6f0ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(63, 159, 255, 0.15) 0%, rgba(124, 77, 255, 0.05) 50%, transparent 70%);
    z-index: 0;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--dark-color);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 80%;
}

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

.primary-btn,
.secondary-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 10px 20px rgba(63, 159, 255, 0.3);
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(63, 159, 255, 0.4);
}

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

.secondary-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.hero-image {
    flex: 1;
    text-align: right;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

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

/* 通用内容区域样式 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    display: flex;
    align-items: center;
}

.section-header h2 i {
    margin-right: 15px;
    color: var(--primary-color);
}

.view-all {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.view-all:hover {
    transform: translateX(5px);
}

.view-all i {
    margin-left: 5px;
}

/* 新闻区域样式 */
.news-section {
    padding: 80px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.news-image {
    height: 200px;
    overflow: hidden;
}

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

.news-card:hover .news-image img {
    transform: scale(1.1);
}

.news-content {
    padding: 25px;
}

.category {
    display: inline-block;
    padding: 5px 15px;
    background-color: #e6f0ff;
    color: var(--primary-color);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.news-content h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.news-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.news-footer span {
    color: var(--text-lighter);
    font-size: 0.9rem;
}

.news-footer a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.news-footer a:hover {
    text-decoration: underline;
}

/* 技术前沿区域样式 */
.tech-section {
    padding: 80px 0;
    background-color: var(--dark-color);
    color: white;
}

.tech-section .section-header h2 {
    color: white;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.tech-card {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transform: rotate(45deg);
    opacity: 0;
    transition: var(--transition);
}

.tech-card:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-10px);
}

.tech-card:hover::before {
    opacity: 1;
    animation: shine 1.5s;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.tech-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.learn-more {
    display: inline-block;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.learn-more::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.learn-more:hover::after {
    width: 100%;
}

/* 教程区域样式 */
.tutorials-section {
    padding: 80px 0;
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.tutorial-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

.tutorial-card:hover .tutorial-image img {
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 30px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
}

.video-duration i {
    margin-right: 5px;
}

.tutorial-content {
    padding: 25px;
}

.tutorial-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.tutorial-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.tutorial-meta {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-lighter);
}

.tutorial-meta i {
    margin-right: 5px;
}

/* 社区活动区域样式 */
.community-section {
    padding: 80px 0;
    background-color: #f5f7fa;
}

.events-calendar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.event-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    display: flex;
    gap: 30px;
    padding: 30px;
    transition: var(--transition);
}

.event-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.event-date {
    min-width: 100px;
    height: 100px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
}

.event-date .month {
    font-size: 0.9rem;
}

.event-date .day {
    font-size: 2.5rem;
}

.event-details h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.event-details p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.event-meta {
    display: flex;
    gap: 30px;
    margin-bottom: 20px;
}

.event-meta i {
    margin-right: 10px;
    color: var(--primary-color);
}

.register-btn {
    padding: 10px 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.register-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* 订阅区域样式 */
.subscribe-section {
    padding: 80px 0;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
}

.subscribe-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.subscribe-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.subscribe-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.subscribe-form {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    max-width: 600px;
    margin: 0 auto 20px;
}

.subscribe-form input {
    flex: 1;
    padding: 15px 30px;
    border: none;
    border-radius: 30px;
    outline: none;
    font-size: 1rem;
}

.subscribe-form button {
    padding: 15px 30px;
    background-color: var(--dark-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.subscribe-form button:hover {
    background-color: #1a293e;
    transform: translateY(-3px);
}

.privacy-note {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
    color: var(--primary-color);
}

.footer-links h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

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

.footer-links ul li {
    margin-bottom: 15px;
}

.footer-links ul li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-social h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-content h1 {
        font-size: 3rem;
    }
}

@media (max-width: 992px) {
    .hero .container {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .hero-content {
        width: 100%;
    }
    
    .hero-content p {
        max-width: 100%;
    }
    
    .hero-image {
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .search-container {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .news-grid,
    .tech-grid,
    .tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .event-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .event-meta {
        flex-direction: column;
        gap: 10px;
        justify-content: center;
    }
    
    .subscribe-form {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}