/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

body {
    background-color: #000;
    color: #fff;
    line-height: 2.2;
}


/* 头部样式 */
/*header {*/
/*    background: linear-gradient(to right, #0a2463, #1e50a2);*/
/*    padding: 20px 0;*/
/*    text-align: center;*/
/*    border-bottom: 1px solid #3a86ff;*/
/*}*/

/*.header-content h1 {*/
/*    font-size: 2.5rem;*/
/*    margin-bottom: 10px;*/
/*    text-shadow: 0 0 10px rgba(58, 134, 255, 0.5);*/
/*}*/

/*.header-content h2 {*/
/*    font-size: 1.8rem;*/
/*    margin-bottom: 20px;*/
/*    color: #3a86ff;*/
/*    text-shadow: 0 0 8px rgba(58, 134, 255, 0.4);*/
/*}*/

/*.header-buttons {*/
/*    display: flex;*/
/*    justify-content: center;*/
/*    gap: 20px;*/
/*}*/

/*.btn {*/
/*    background-color: transparent;*/
/*    border: 1px solid #3a86ff;*/
/*    color: #fff;*/
/*    padding: 8px 20px;*/
/*    border-radius: 20px;*/
/*    cursor: pointer;*/
/*    transition: all 0.3s ease;*/
/*}*/

/*.btn:hover, .btn.active {*/
/*    background-color: #3a86ff;*/
/*    box-shadow: 0 0 10px rgba(58, 134, 255, 0.7);*/
/*}*/

/* 表单校验提示样式 */
.form-text {
    display: block;
    margin-top: 5px;
    font-size: 0.8rem;
    color: #3a86ff;
}

/* 表单校验错误样式 */
.form-group input:invalid,
.form-group textarea:invalid,
.form-group select:invalid {
    border-color: #ff4d4d;
    box-shadow: 0 0 5px rgba(255, 77, 77, 0.5);
}

.form-group input:valid,
.form-group textarea:valid,
.form-group select:valid {
    border-color: #3a86ff;
}

/* 表单校验提示信息样式 */
.form-group input:invalid:focus,
.form-group textarea:invalid:focus,
.form-group select:invalid:focus {
    outline: none;
    border-color: #ff4d4d;
    box-shadow: 0 0 10px rgba(255, 77, 77, 0.7);
}



/* 头部样式 */
header {
    background: linear-gradient(135deg, #0a2463 0%, #1e50a2 50%, #0a2463 100%);
    padding: 20px 0;
    text-align: center;
    border-bottom: 1px solid #3a86ff;
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(58, 134, 255, 0.15) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, rgba(58, 134, 255, 0.15) 0%, transparent 20%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.header-logo {
    position: relative;
    display: inline-block;
    margin-bottom: 10px;
}

.header-logo::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, #3a86ff, transparent);
}

.header-content h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(58, 134, 255, 0.7);
    background: linear-gradient(to right, #fff, #3a86ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-content h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #3a86ff;
    text-shadow: 0 0 10px rgba(58, 134, 255, 0.5);
}

.header-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.btn {
    background-color: transparent;
    border: 1px solid #3a86ff;
    color: #fff;
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(58, 134, 255, 0.3), transparent);
    transition: 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover, .btn.active {
    background-color: rgba(58, 134, 255, 0.2);
    box-shadow: 0 0 15px rgba(58, 134, 255, 0.7);
    transform: translateY(-2px);
}

/* 头部装饰元素 */
.header-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 15px;
}

.tech-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, #3a86ff, transparent);
}

.tech-node {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #3a86ff;
    box-shadow: 0 0 10px rgba(58, 134, 255, 0.8);
    margin: 0 10px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(58, 134, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(58, 134, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(58, 134, 255, 0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.8rem;
    }

    .header-content h2 {
        font-size: 1.4rem;
    }

    .header-buttons {
        flex-wrap: wrap;
    }

    .btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
}


/* 英雄区域 */
/*.hero {*/
/*    height: 600px;*/
/*    display: flex;*/
/*    justify-content: center;*/
/*    align-items: center;*/
/*    !*background: linear-gradient(to bottom, #0a2463, #051937);*!*/
/*    background-image: url("images/bg01.jpg");*/
/*    position: relative;*/
/*    overflow: hidden;*/
/*}*/
/* 英雄区域 */
.hero {
    height: 800px;
    display: flex;
    flex-direction: column; /* 改为列布局 */
    justify-content: center; /* 垂直居中 */
    align-items: center;     /* 水平居中 */
    background-image: url("images/bg03.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    overflow: hidden;
}


.hero:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(58, 134, 255, 0.1) 3px, rgba(58, 134, 255, 0.1) 4px);
    pointer-events: none;
}

/*添加报名*/
/* 报名按钮样式 */
.signup-btn {
    margin-top: 30px;
    font-size: 1.2rem;
    padding: 12px 30px;
    background-color: #3a86ff;
    box-shadow: 0 0 15px rgba(58, 134, 255, 0.7);
}

.signup-btn:hover {
    background-color: #2a6ed9;
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(58, 134, 255, 0.9);
}

/* 弹窗样式 */
.signup-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: #0a2463;
    margin: 5% auto;
    padding: 30px;
    border: 1px solid #3a86ff;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 0 30px rgba(58, 134, 255, 0.5);
    max-height: 80vh; /* 添加最大高度 */
    overflow-y: auto;  /* 添加垂直滚动条 */
}

/* 为滚动条添加样式 */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: rgba(5, 25, 55, 0.5);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: #3a86ff;
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: #2a6ed9;
}


.modal-content h2 {
    color: #3a86ff;
    text-align: center;
    margin-bottom: 20px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 10px;
}

.close:hover,
.close:focus {
    color: #3a86ff;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #fff;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #3a86ff;
    border-radius: 5px;
    background-color: rgba(5, 25, 55, 0.8);
    color: #fff;
    font-size: 1rem;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3a86ff;
    box-shadow: 0 0 10px rgba(58, 134, 255, 0.5);
}

.submit-btn {
    width: 100%;
    padding: 12px;
    font-size: 1.1rem;
    background-color: #3a86ff;
    border: none;
    cursor: pointer;
}

.submit-btn:hover {
    background-color: #2a6ed9;
    transform: translateY(-2px);
}

/* 手机验证码样式 */
.phone-verification {
    display: flex;
    gap: 10px;
}

.phone-verification input {
    flex: 1;
}

.verification-btn {
    background-color: #3a86ff;
    border: 1px solid #3a86ff;
    color: white;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    white-space: nowrap;
    font-size: 0.9rem;
}

.verification-btn:hover:not(:disabled) {
    background-color: #2a6ed9;
}

.verification-btn:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}

.verification-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #3a86ff;
    border-radius: 5px;
    background-color: rgba(5, 25, 55, 0.8);
    color: #fff;
    font-size: 1rem;
    box-sizing: border-box;
    margin-top: 10px;
}

.verification-input:focus {
    outline: none;
    border-color: #3a86ff;
    box-shadow: 0 0 10px rgba(58, 134, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .phone-verification {
        flex-direction: column;
    }

    .verification-btn {
        width: 100%;
        padding: 12px;
    }
}


/* 响应式设计 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        padding: 20px;
        margin: 10% auto;
    }

    .signup-btn {
        font-size: 1rem;
        padding: 10px 20px;
    }
}


.ai-animation {
    position: relative;
    width: 200px;
    height: 200px;
    /*margin: 0 auto; !* 水平居中 *!*/
    margin-bottom: 25%;
    display: flex;  /* 添加flex布局 */
    justify-content: center; /* 水平居中 */
    align-items: center;     /* 垂直居中 */
}

.hero-text {
    position: absolute;
    text-align: center;
    /*bottom: 400px;*/
    bottom: 30%;
    width: 100%;
}

.hero-text h2 {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    color: #fff;
    text-shadow: 0 0 15px rgba(58, 134, 255, 0.8);
    margin-bottom: 10px;
}


.hero-text p {
    font-size: 1.5rem;
    color: #3a86ff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.ai-icon {
    width: 200px;
    height: 200px;
    /* 移除 margin: 0 auto 因为父元素已经处理了居中 */
    position: relative;
    animation: glow 3s infinite alternate;
}

.ai-icon:before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background-color: #3a86ff;
    border-radius: 50%;
}

.ai-icon:after {
    content: "";
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    background: radial-gradient(circle at center, #3a86ff 0%, transparent 70%);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(58, 134, 255, 0.8);
}

@keyframes glow {
    0% {
        filter: drop-shadow(0 0 5px rgba(58, 134, 255, 0.5));
        transform: scale(0.95);
    }
    100% {
        filter: drop-shadow(0 0 20px rgba(58, 134, 255, 0.8));
        transform: scale(1.05);
    }
}


/* 重要文本高亮特效 */
.highlight-text {
    position: relative;
    display: inline-block;
    color: #3a86ff;
    font-weight: bold;
    padding: 5px 10px;
    margin: 5px 0;
    background: linear-gradient(to right, rgba(58, 134, 255, 0.1), rgba(58, 134, 255, 0.3), rgba(58, 134, 255, 0.1));
    border-radius: 5px;
    /*animation: textGlow 3s ease-in-out infinite alternate;*/
    /*text-shadow: 0 0 5px rgba(58, 134, 255, 0.5);*/
    /*transition: all 0.3s ease;*/
}

/*.highlight-text::before {*/
/*    content: "";*/
/*    position: absolute;*/
/*    top: 0;*/
/*    left: 0;*/
/*    width: 100%;*/
/*    height: 100%;*/
/*    background: linear-gradient(90deg, transparent, rgba(58, 134, 255, 0.2), transparent);*/
/*    animation: shine 3s infinite;*/
/*    border-radius: 5px;*/
/*}*/

.highlight-text:hover {
    transform: scale(1.02);
    text-shadow: 0 0 10px rgba(58, 134, 255, 0.8);
    background: linear-gradient(to right, rgba(58, 134, 255, 0.2), rgba(58, 134, 255, 0.4), rgba(58, 134, 255, 0.2));
}

@keyframes textGlow {
    0% {
        box-shadow: 0 0 5px rgba(58, 134, 255, 0.3);
    }
    100% {
        box-shadow: 0 0 15px rgba(58, 134, 255, 0.6);
    }
}

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

/* 为不同行添加延迟效果 */
.highlight-text:nth-child(1) {
    animation-delay: 0s;
}

.highlight-text:nth-child(2) {
    animation-delay: 0.5s;
}

.highlight-text:nth-child(3) {
    animation-delay: 1s;
}


/* 组织机构区域 */
.sponsors {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
}

.org-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.org-group {
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 20px;
}

.org-group h3 {
    color: #3a86ff;
    margin-bottom: 15px;
    font-size: 1.3rem;
    text-align: center;
}

.org-group p {
    line-height: 1.8;
    text-align: justify;
}

/* 通用部分标题样式 */
.section-title {
    color: #3a86ff;
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.section-title::before,
.section-title::after {
    content: "";
    height: 1px;
    background: linear-gradient(to right, transparent, #3a86ff, transparent);
    flex: 1;
    margin: 0 15px;
}

.ai-icon::before {
    content: "🔷";
    margin-right: 10px;
    color: #3a86ff;
}

/* 赛事简介 */
.competition-intro {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
}

.intro-content {
    display: flex;
    gap: 30px;
}

.intro-text {
    flex: 2;
    padding: 20px;
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
}

.intro-info {
    flex: 1;
    padding: 20px;
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
}

.info-item h3 {
    color: #3a86ff;
    margin-bottom: 10px;
}

/* 赛道设置 */
.competition-tracks {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
    position: relative;
}

.competition-tracks::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(58, 134, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.tracks-container {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.track-card {
    flex: 1;
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(58, 134, 255, 0.2) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.track-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(58, 134, 255, 0.3);
}

.track-card:hover::before {
    opacity: 1;
}

.track-img {
    width: 100%;
    height: 150px;
    background-color: #0a2463;
    border-radius: 5px;
    margin-bottom: 15px;
    position: relative;
    overflow: hidden;
}

.ai-track1::before, .ai-track2::before, .ai-track3::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #3a86ff, transparent);
    opacity: 0.7;
}

.ai-track3::before {
    background: linear-gradient(135deg, #3a86ff, transparent);
}

.track-card h3 {
    color: #3a86ff;
    margin-bottom: 10px;
}

/* 赛程安排 */
.competition-schedule {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
}

.schedule-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.schedule-item {
    display: flex;
    gap: 20px;
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 15px;
    position: relative;
    overflow: hidden;
}

.schedule-item::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background-color: #3a86ff;
    box-shadow: 0 0 10px rgba(58, 134, 255, 0.7);
}

.schedule-date {
    flex: 0 0 150px;
    font-weight: bold;
    color: #3a86ff;
}

.schedule-content h3 {
    color: #3a86ff;
    margin-bottom: 5px;
}

/* 参赛规则 */
.competition-rules {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
    position: relative;
}

.competition-rules::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, #3a86ff, transparent);
}

.rules-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.rule-item {
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.rule-item::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 30px 30px 0;
    border-color: transparent #3a86ff transparent transparent;
}

.rule-item h3 {
    color: #3a86ff;
    margin-bottom: 10px;
}

/* 奖项设置 */
.competition-awards {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
}

.awards-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.award-item {
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 20px;
}

.award-item h3 {
    color: #3a86ff;
    margin-bottom: 10px;
}

/* 咨询渠道 */
.contact-info {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
}

.contact-container {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.contact-column {
    flex: 1;
    max-width: 600px;
    background-color: rgba(10, 36, 99, 0.8);
    border: 1px solid #3a86ff;
    border-radius: 5px;
    padding: 20px;
    text-align: center;
}

.contact-column h3 {
    color: #3a86ff;
    margin-bottom: 10px;
}

/* 页脚 */
footer {
    padding: 50px 10%;
    background-color: #051937;
}

.footer-content {
    text-align: center;
}

.footer-slogan {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #fff;
    text-shadow: 0 0 10px rgba(58, 134, 255, 0.5);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-row {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.9rem;
    color: #aaa;
}

.footer-btn {
    margin-top: 20px;
}

/* 联系我们弹窗样式 */
.contact-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.contact-modal .modal-content {
    background-color: #0a2463;
    margin: 15% auto;
    padding: 30px;
    border: 1px solid #3a86ff;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 0 30px rgba(58, 134, 255, 0.5);
    text-align: center;
}

.contact-modal .modal-content h2 {
    color: #3a86ff;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.contact-info-content {
    color: #fff;
    line-height: 1.8;
}

.contact-info-content p {
    margin: 10px 0;
}

.contact-info-content p:first-child {
    margin-bottom: 15px;
}

/* 重用已有样式 */
.contact-modal .close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 10px;
}

.contact-modal .close:hover,
.contact-modal .close:focus {
    color: #3a86ff;
}



/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 添加科技感元素 */
.ai-track1::after, .ai-track2::after, .ai-track3::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(to right, transparent, #3a86ff, transparent);
    animation: scanLine 2s infinite linear;
}

.ai-track3::after {
    animation-delay: 0.7s;
}

@keyframes scanLine {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(100%);
        opacity: 0;
    }
}

/* 添加科技感背景 */
.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(58, 134, 255, 0.15) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, rgba(58, 134, 255, 0.15) 0%, transparent 20%);
    pointer-events: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .intro-content, .tracks-container, .contact-container {
        flex-direction: column;
    }

    .header-content h1 {
        font-size: 1.8rem;
    }

    .header-content h2 {
        font-size: 1.4rem;
    }

    .header-buttons {
        flex-wrap: wrap;
    }

    .schedule-item {
        flex-direction: column;
    }

    .schedule-date {
        flex: 0 0 auto;
        margin-bottom: 10px;
    }

    .contact-row {
        flex-direction: column;
        align-items: center;
    }

    .org-group p {
        font-size: 0.9rem;
    }

    .award-item h3 {
        font-size: 1.1rem;
    }
}


/* 响应式设计优化 */

/* 大屏幕设备 */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* 中等屏幕设备 */
@media (max-width: 992px) {
    .header-content h1 {
        font-size: 2.2rem;
    }

    .header-content h2 {
        font-size: 1.6rem;
    }

    .hero {
        height: 600px;
    }

    .hero-text h2 {
        font-size: 3rem;
    }

    .intro-content,
    .tracks-container,
    .schedule-container,
    .rules-container,
    .awards-container,
    .contact-container {
        flex-direction: column;
    }

    .intro-text,
    .intro-info {
        width: 100%;
    }

    .track-card {
        margin-bottom: 20px;
    }

    .tracks-container {
        gap: 20px;
    }
}

/* 小屏幕设备（平板） */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.8rem;
    }

    .header-content h2 {
        font-size: 1.4rem;
    }

    .header-buttons {
        flex-wrap: wrap;
        gap: 10px;
    }

    .btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }

    .hero {
        height: 500px;
    }

    .hero-text h2 {
        font-size: 2rem;
    }

    .ai-icon {
        width: 150px;
        height: 150px;
    }

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

    .org-group p {
        font-size: 0.9rem;
    }

    .track-card h3 {
        font-size: 1.1rem;
    }

    .schedule-item {
        flex-direction: column;
    }

    .schedule-date {
        flex: 0 0 auto;
        margin-bottom: 10px;
    }

    .contact-row {
        flex-direction: column;
        align-items: center;
    }

    .award-item h3 {
        font-size: 1.1rem;
    }

    .modal-content {
        width: 95%;
        padding: 20px;
        margin: 10% auto;
    }

    .contact-modal .modal-content {
        margin: 20% auto;
    }
}

/* 超小屏幕设备（手机） */
@media (max-width: 480px) {
    header {
        padding: 15px 0;
    }

    .header-content h1 {
        font-size: 1.5rem;
    }

    .header-content h2 {
        font-size: 1.2rem;
    }

    .hero {
        height: 400px;
    }

    .hero-text h2 {
        font-size: 1.5rem;
    }

    .ai-icon {
        width: 120px;
        height: 120px;
    }

    .signup-btn {
        font-size: 1rem;
        padding: 10px 20px;
    }

    section {
        padding: 30px 5%;
    }

    .sponsors {
        padding: 30px 5%;
    }

    .section-title {
        font-size: 1.3rem;
    }

    .org-container {
        gap: 20px;
    }

    .org-group {
        padding: 15px;
    }

    .track-card {
        padding: 15px;
    }

    .schedule-item {
        padding: 12px;
    }

    .rule-item,
    .award-item {
        padding: 15px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* 防止iOS缩放 */
    }

    .form-text {
        font-size: 0.7rem;
    }

    footer {
        padding: 30px 5%;
    }

    .footer-slogan {
        font-size: 1rem;
    }
}

/* 移动端特殊优化 */
@media (max-width: 480px) {
    .modal-content h2 {
        font-size: 1.3rem;
    }

    .contact-modal .modal-content h2 {
        font-size: 1.5rem;
    }

    .form-group {
        margin-bottom: 15px;
    }

    .submit-btn {
        padding: 10px;
        font-size: 1rem;
    }

    .track-img {
        height: 120px;
    }
}

/* 横屏手机优化 */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        height: 350px;
    }

    .modal-content {
        max-height: 90vh;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    * {
        box-sizing: border-box;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        background-color: transparent;
    }

    .btn:active {
        background-color: #3a86ff;
        box-shadow: 0 0 10px rgba(58, 134, 255, 0.7);
    }

    .track-card:hover {
        transform: none;
        box-shadow: none;
    }

    .track-card:active {
        transform: translateY(-5px);
        box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
    }
}
/* 超小屏幕设备（手机） */
@media (max-width: 480px) {
    .hero {
        height: 400px;
    }

    .ai-animation {
        width: 150px;
        height: 150px;
    }

    .ai-icon {
        width: 150px;
        height: 150px;
    }

    .hero-text {
        bottom: 25%;
    }
}

/* 横屏手机优化 */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        height: 350px;
    }

    .ai-animation {
        width: 150px;
        height: 150px;
    }

    .ai-icon {
        width: 150px;
        height: 150px;
    }
}

/* 大赛口号弹幕区域样式 */
.competition-slogan {
    padding: 50px 10%;
    background-color: #051937;
    border-bottom: 1px solid #3a86ff;
    position: relative;
    overflow: hidden;
}

.competition-slogan::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at center, rgba(58, 134, 255, 0.1) 0%, transparent 70%),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(58, 134, 255, 0.05) 3px, rgba(58, 134, 255, 0.05) 4px);
    pointer-events: none;
}

.slogan-container {

    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.slogan-header {
    text-align: center;
    margin-bottom: 30px;
}

.barrage-container {
    position: relative;
    height: 150px;
    overflow: hidden;
    border: 1px solid rgba(58, 134, 255, 0.3);
    border-radius: 10px;
    background: rgba(5, 25, 55, 0.6);
    box-shadow: 0 0 20px rgba(58, 134, 255, 0.2);
}

.barrage-item {
    position: absolute;
    white-space: nowrap;
    color: #fff;
    font-weight: bold;
    text-shadow: 0 0 5px rgba(58, 134, 255, 0.8);
    padding: 8px 15px;
    border-radius: 20px;
    background: rgba(58, 134, 255, 0.15);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(58, 134, 255, 0.3);
    animation: barrageMove linear forwards;
    cursor: default;
    transition: all 0.3s ease;
}

.barrage-item:hover {
    transform: scale(1.05);
    z-index: 100;
    box-shadow: 0 0 15px rgba(58, 134, 255, 0.8);
    background: rgba(58, 134, 255, 0.3);
}

.barrage-item.special {
    color: #3a86ff;
    text-shadow: 0 0 10px rgba(58, 134, 255, 1);
    background: rgba(58, 134, 255, 0.25);
    border: 1px solid rgba(58, 134, 255, 0.6);
}

@keyframes barrageMove {
    from {
        transform: translateX(100vw);
    }
    to {
        transform: translateX(-100%);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .competition-slogan {
        padding: 30px 5%;
    }

    .barrage-container {
        height: 250px;
    }

    .barrage-item {
        font-size: 0.9rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .barrage-container {
        height: 200px;
    }

    .barrage-item {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
}