/* style-optimized.css - English Version */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --hkbubg-blue: #003366;
    --hkbubg-light-blue: #0055a5;
    --hkbubg-gold: #d4af37;
    --hkbubg-light-gold: #f0e6c5;
    --text-color: #333333;
    --text-light: #666666;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --border-color: #dee2e6;
    --white: #ffffff;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Noto Sans TC', 'Segoe UI', sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background-color: var(--white);
    font-weight: 400;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--hkbubg-blue);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

/* h1:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--hkbubg-blue), var(--hkbubg-light-blue));
    border-radius: 2px;
} */

h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--hkbubg-light-blue);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1.2rem;
}

/* Header Styles */
.header {
    background-color: var(--hkbubg-blue);
    color: var(--white);
    /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); */
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    padding: 15px 0;
}

.logo-placeholder {
    display: flex;
    align-items: center; /* 垂直居中对齐 */
    gap: 25px; /* 控制图片和文字间距 */
    padding: 10px 0px;
}

.university-name {
    height: 50px; /* 固定高度，保持与文字对齐 */
    width: auto; /* 保持图片比例 */
    padding-left: 20px;
}

.site-title {
    font-size: 24px; /* 根据实际需求调整 */
    font-weight: bold;
    /* 其他文字样式 */
}

/* .university-name {
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 1px;
    opacity: 0.9;
    height:100px;
}

.site-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--hkbubg-gold);
    margin-top: 5px;
} */

/* Main Navigation - Fixed to prevent wrapping */
.main-nav {
    background-color: var(--hkbubg-light-blue);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
    white-space: nowrap;
}

.main-nav ul {
    list-style: none;
    display: inline-flex;
    justify-content: flex-start;
    padding: 0;
    margin: 0;
    min-width: max-content;
}

.main-nav li {
    position: relative;
    flex-shrink: 0;
}

.main-nav li a {
    display: block;
    padding: 18px 20px;
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

.main-nav li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--hkbubg-gold);
}

.main-nav li a.active {
    background-color: var(--white);
    color: var(--hkbubg-blue);
    font-weight: 600;
}

.main-nav li a.active:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--hkbubg-gold), #f8d568);
}

/* Main Content Area */
.main-content {
    min-height: 70vh;
    /* padding: 40px 0; */
    background-color: var(--light-gray);
}

.content-section {
    background-color: var(--white);
    border-radius: 10px;
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

/* Card Section Styles */
.card-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.card {
    background: var(--white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 5px solid var(--hkbubg-light-blue);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-top-color: var(--hkbubg-gold);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--hkbubg-light-blue), var(--hkbubg-blue));
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    font-weight: bold;
}

.card h4 {
    color: var(--hkbubg-blue);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.card p {
    color: var(--text-light);
    margin-bottom: 10px;
    flex-grow: 1;
}

/* Footer Styles */
.footer {
    background: linear-gradient(135deg, var(--hkbubg-blue), #002244);
    color: var(--white);
    padding: 60px 0 20px;
}

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

.oirp-section {
    display: flex;
    flex-direction: column;
}

.oirp-logo-placeholder {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--hkbubg-gold), #f8d568);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--hkbubg-blue);
    margin-bottom: 20px;
}

.oirp-text p {
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 5px;
}

.footer-col h4 {
    color: var(--hkbubg-gold);
    margin-bottom: 20px;
    font-size: 1.2rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--hkbubg-gold);
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-col ul li a:hover {
    color: var(--hkbubg-gold);
    padding-left: 5px;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.social-icons span {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    cursor: pointer;
    font-weight: bold;
}

.social-icons span:hover {
    background: var(--hkbubg-gold);
    color: var(--hkbubg-blue);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Policy Page Layout */
.policy-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}

.left-nav {
    background: var(--white);
    border-radius: 10px;
    /* padding: 25px; */
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 205px;
}

.left-nav ul {
    list-style: none;
}

.left-nav ul li {
    margin-bottom: 5px;
}

.left-nav ul li a {
    display: block;
    padding: 12px 10px;
    color: var(--text-color);
    border-radius: 5px;
    transition: var(--transition);
    font-weight: 500;
}

.left-nav ul li a:hover {
    background-color: var(--hkbubg-light-gold);
    color: var(--hkbubg-blue);
    padding-left: 10px;
}

.left-nav ul li a.active {
    background-color: var(--hkbubg-blue);
    color: var(--white);
    /* font-weight: 600; */
}

.left-nav ul ul {
    margin-left: 15px;
    margin-top: 5px;
    border-left: 2px solid var(--medium-gray);
    padding-left: 10px;
}

.left-nav ul ul li a {
    padding: 8px 15px;
    font-size: 0.95rem;
}

.policy-content {
    background: var(--white);
    border-radius: 10px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.view-full-btn {
            background: linear-gradient(135deg, var(--hkbubg-blue), var(--hkbubg-light-blue));
            color: var(--white);
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
        }
        
.view-full-btn:hover {
            background: linear-gradient(135deg, var(--hkbubg-light-blue), var(--hkbubg-blue));
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 51, 102, 0.3);
        }






/* Responsive Design */
@media (max-width: 1024px) {
    .policy-layout {
        grid-template-columns: 1fr;
    }
    
    .left-nav {
        position: static;
    }
}

@media (max-width: 768px) {
    .main-nav ul {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .main-nav li a {
        padding: 15px;
        font-size: 0.9rem;
    }
    
    .card-section {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .content-section {
        padding: 25px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.7rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .content-section {
        padding: 20px;
    }
    
    .policy-content {
        padding: 25px;
    }
    
    .card {
        padding: 20px;
    }
}