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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7fc;
    color: #333;
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 1px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-links li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: background 0.3s;
}

.nav-links li a:hover {
    background: rgba(255,255,255,0.2);
}

.hamburger {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

.hero {
    text-align: center;
    padding: 4rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.search-bar {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    max-width: 600px;
    margin: 0 auto;
}

.search-bar input {
    width: 80%;
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 30px;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.search-bar button {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 30px;
    background: #ff6b6b;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.search-bar button:hover {
    background: #ee5a24;
}

.price-calculator-section {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.price-calculator-section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2a5298;
}

.calculator {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.calc-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.calc-row label {
    min-width: 120px;
    font-weight: 600;
}

.calc-row select {
    flex: 1;
    padding: 0.6rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

.btn-primary {
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    align-self: center;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102,126,234,0.4);
}

.calc-result {
    text-align: center;
    font-size: 1.3rem;
    padding: 1rem;
    background: #e8f5e9;
    border-radius: 12px;
    margin-top: 1rem;
}

.institutions {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.institutions h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2a5298;
}

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-bar select {
    padding: 0.6rem 1.2rem;
    border: 1px solid #ddd;
    border-radius: 25px;
    font-size: 1rem;
    background: white;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: white;
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #eef;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.12);
}

.card h3 {
    margin-bottom: 0.8rem;
    color: #1e3c72;
}

.card p {
    margin: 0.3rem 0;
}

.stars {
    color: #f39c12;
}

.user-reviews {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.user-reviews h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2a5298;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.review-card {
    background: white;
    padding: 1.2rem;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    border-left: 4px solid #667eea;
}

.review-card p {
    margin: 0.3rem 0;
}

.review-card small {
    color: #999;
}

footer {
    background: #1e3c72;
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
}

footer a {
    color: #ffb347;
    text-decoration: none;
}

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

.admin-main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.admin-section {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    margin-bottom: 2rem;
}

.admin-section h2, .admin-section h3 {
    color: #2a5298;
    margin-bottom: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

table th, table td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th {
    background: #f0f4ff;
}

form input, form textarea, form select {
    width: 100%;
    padding: 0.6rem;
    margin: 0.3rem 0 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

form button {
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
}

.error {
    color: #e74c3c;
}

.success {
    color: #27ae60;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

/* 内页通用 */
.page-header {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.page-header h1 {
    font-size: 2.2rem;
}

.page-content {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.faq-item {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.faq-item h3 {
    color: #1e3c72;
    margin-bottom: 0.5rem;
}

.tips-list {
    list-style: none;
    padding: 0;
}

.tips-list li {
    background: white;
    padding: 1.2rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border-left: 4px solid #27ae60;
}

.chart-container {
    max-width: 700px;
    margin: 2rem auto;
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.compare-table {
    width: 100%;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.compare-table th, .compare-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.compare-table th {
    background: #667eea;
    color: white;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #1e3c72;
        position: absolute;
        top: 70px;
        left: 0;
        padding: 1rem;
    }
    .nav-links.active {
        display: flex;
    }
    .hamburger {
        display: block;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
}