* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    background-color: #f4f6f9;
    line-height: 1.6;
    padding: 1rem 1rem;
    min-height: 100vh;
}
a {
    color: #0d6efd;
    text-decoration: none;
}

/* 页面容器 */
.container {
    max-width: 1500px;
    margin: 0 auto;
}

/* 深色页眉 */
.hero {
    background: linear-gradient(135deg, #1a1a40, #3a0ca3);
    color: #fff;
    text-align: center;
    padding: 20px 0 15px 0;
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: 0 6px 12px rgba(58, 12, 163, 0.5);
}

.hero h1 {
    font-size: 35px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 4px;
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.hero .organizer {
    font-size: 20px;
    font-weight: 400;
    color: #ced4da;
}

/* 卡片区域 */
.rule-section {
    background-color: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    padding: 20px 30px;
    margin-bottom: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid rgba(255,255,255,0.5);
}
.rule-section:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 20px rgba(13,110,253,0.08);
}

.rule-section h2 {
    font-size: 24px;
    font-weight: 600;
    color: #0b2b4a;
    margin-bottom: 14px;
    padding-left: 20px;
    border-left: 6px solid #0d6efd;
    line-height: 1.3;
}
.rule-section p {
    margin-bottom: 3px;
    color: #2d3e53;
    font-size: 1rem;
}

/* 子区块标题 */
.sub-title {
    font-weight: 650;
    font-size: 18px;
    color: #0a4b7a;
    margin-top: 14px;
    margin-bottom: 8px;
    border-bottom: 1px solid #e6ecf0;
}
/* 缩进块 */
.sub-block {
    margin-left: 3px;
    padding-left: 16px;
    border-left: 3px solid #dee2e6;
    margin-bottom: 14px;
}

/* 列表项 */
.list-item {
    padding-left: 24px;
    margin-bottom: 4px;
    color: #2c3e50;
}

/* 文档链接块 */
.doc-link {
    background-color: #f1f6fd;
    padding: 14px 24px;
    border-radius: 14px;
    border-left: 6px solid #0d6efd;
    margin-top: 12px;
    margin-bottom: 8px;
}
.doc-link a {
    color: #0a58ca;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid rgba(13,110,253,0.3);
    transition: border-color 0.15s;
}
.doc-link a:hover {
    border-bottom-color: #0d6efd;
}
iframe {
    width: 100%;
    height: 100vh;
    margin-top: 5px;
    border: none;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.highlight {
    background: #e9ecef;
    padding: 3px 8px;
    border-radius: 8px;
    font-weight: 550;
    color: #0d3e6b;
}

/* 强标签 */
.strong-label {
    font-weight: 700;
    color: #0b5e8a;
    background: #e8f1fe;
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 16px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .wrapper {
        padding: 8px;
    }

    .hero h1 {
        font-size: 26px;
    }
    .hero .organizer {
        font-size: 16px;
    }

    .rule-section {
        padding: 16px 20px;
    }
    .rule-section h2 {
        font-size: 20px;
    }

    .doc-link {
        padding: 12px 10px;
        border-left: 4px solid #0d6efd;
    }
}