:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f1f5f9;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.375rem;
    font-weight: 700;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--bg-gradient);
    border-radius: 1px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
}

main {
    padding: 2rem 0;
    max-width: 1200px;
    margin: 0 auto;
    min-height: calc(100vh - 140px);
}

footer {
    background: #1e293b;
    color: #94a3b8;
    text-align: center;
    padding: 2rem 1.5rem;
    margin-top: 3rem;
}

footer p {
    font-size: 0.875rem;
}

.hero {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--bg-gradient);
    color: #fff;
    border-radius: var(--radius-xl);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: float 6s ease-in-out infinite;
}

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

.hero h1 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.hero p {
    opacity: 0.9;
    font-size: 1.125rem;
    position: relative;
    z-index: 1;
}

.section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text);
}

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

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.user-info-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.user-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
}

.user-info-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius-md);
}

.user-info-item .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.user-info-item .value {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-info-item .value.green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.score-lines {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.score-line-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.score-line-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.score-line-card .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.score-line-card .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.recommend-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--border);
    background: var(--card-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-secondary);
}

.tab-btn:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--bg-gradient);
    color: #fff;
    border-color: transparent;
}

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

.school-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.school-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.school-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.school-card-header h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text);
}

.school-score {
    text-align: right;
    flex-shrink: 0;
}

.school-score .score {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--primary);
}

.school-score .rank {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.school-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag {
    padding: 0.25rem 0.625rem;
    background: var(--bg);
    border-radius: 9999px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.tag.primary {
    background: #e0e7ff;
    color: var(--primary-dark);
}

.tag.success {
    background: #d1fae5;
    color: var(--success);
}

.tag.warning {
    background: #fef3c7;
    color: var(--warning);
}

.tag.danger {
    background: #fee2e2;
    color: var(--danger);
}

.tag.secondary {
    background: #ede9fe;
    color: var(--secondary-dark);
}

.school-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.school-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.chart-container {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.chart-canvas {
    width: 100%;
    height: 300px;
    position: relative;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.query-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.query-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-group select,
.form-group input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: var(--transition);
    background: var(--card-bg);
    color: var(--text);
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--bg-gradient);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.query-result {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
}

.query-result .result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.query-result .result-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.major-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.major-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.major-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.major-card .category {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.major-card .info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.major-card .info span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.major-card .major-desc {
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.major-card .major-section {
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.major-card .major-section strong {
    color: var(--text);
    display: block;
    margin-bottom: 0.375rem;
}

.major-card .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag.hot {
    background: linear-gradient(135deg, #ff6b6b, #ee5a5a);
    color: white;
    border-color: transparent;
}

.tag.cold {
    background: linear-gradient(135deg, #74b9ff, #0984e3);
    color: white;
    border-color: transparent;
}

.tag.ranking {
    background: linear-gradient(135deg, #fdcb6e, #f39c12);
    color: white;
    border-color: transparent;
    font-weight: 600;
}

.tag.small {
    font-size: 0.6875rem;
    padding: 0.125rem 0.5rem;
}

.filter-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-bar .form-group {
    flex: 1;
    min-width: 150px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--primary-dark);
    transform: translateX(-2px);
}

.school-detail-header {
    background: var(--bg-gradient);
    color: #fff;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.school-detail-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
}

.school-detail-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.school-detail-header .meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.school-detail-header .meta span {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.detail-item {
    background: var(--bg);
    padding: 1rem;
    border-radius: var(--radius-md);
}

.detail-item .label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.detail-item .value {
    font-weight: 600;
    color: var(--text);
}

.detail-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.detail-section h2 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.score-table {
    width: 100%;
    border-collapse: collapse;
}

.score-table th,
.score-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.score-table th {
    background: var(--bg);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.score-table tr:hover td {
    background: var(--bg);
}

.score-table tr:last-child td {
    border-bottom: none;
}

.advantage-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.advantage-tags .tag {
    padding: 0.5rem 0.875rem;
    background: #e0e7ff;
    color: var(--primary-dark);
    font-size: 0.875rem;
}

.disclaimer {
    background: #fef3c7;
    border-left: 4px solid var(--warning);
    padding: 1rem 1.25rem;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-top: 2rem;
    font-size: 0.875rem;
    color: #92400e;
}

.disclaimer strong {
    display: block;
    margin-bottom: 0.25rem;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: var(--transition);
}

.tab:hover {
    color: var(--primary);
}

.tab.active {
    color: var(--primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.compare-table th {
    background: var(--bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.compare-table tr:last-child td {
    border-bottom: none;
}

.compare-table td:first-child {
    text-align: left;
    font-weight: 500;
    color: var(--text-secondary);
}

.school-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.school-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.school-links a:hover {
    color: var(--primary-dark);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--border);
        gap: 0.75rem;
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero {
        padding: 2rem 1.5rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .recommend-grid {
        grid-template-columns: 1fr;
    }

    .major-grid {
        grid-template-columns: 1fr;
    }

    .user-info-card {
        grid-template-columns: repeat(2, 1fr);
        padding: 1.5rem;
    }

    .user-info-item .value {
        font-size: 1.375rem;
    }

    .school-detail-header {
        padding: 1.5rem;
    }

    .school-detail-header h1 {
        font-size: 1.375rem;
    }

    .query-form {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
    }

    .filter-bar .form-group {
        width: 100%;
    }

    .score-table {
        font-size: 0.8125rem;
    }

    .score-table th,
    .score-table td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    nav {
        padding: 0.75rem 1rem;
    }

    main {
        padding: 1.5rem 0;
    }

    .user-info-card {
        grid-template-columns: 1fr;
    }

    .score-lines {
        grid-template-columns: 1fr 1fr;
    }

    .section-title {
        font-size: 1.125rem;
    }
}