body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f4f6f9;
    color: #334155;
}
.chasm-header {
    position: relative;
    z-index: 10001;
    height: 60px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    background: #ffffff;
}
.chasm-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    position: relative;
}
.chasm-logo {
    float: left;
    padding: 10px 0;
}
.chasm-logo img {
    height: 40px;
    display: block;
}
.chasm-nav {
    float: left;
    list-style: none;
    margin: 0 0 0 30px;
    padding: 0;
}
.chasm-nav-item {
    float: left;
    line-height: 60px;
    margin: 0 15px;
}
.chasm-nav-item a {
    color: #334155;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.3s;
}
.chasm-nav-item a:hover {
    color: #0284c7;
}
.chasm-nav-user {
    float: right;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chasm-nav-user .chasm-nav-item {
    line-height: 60px;
}
.chasm-main {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 15px;
    min-height: calc(100vh - 220px);
}
.chasm-cat-box {
    display: flex;
    gap: 12px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}
.chasm-cat-item {
    background: #ffffff;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    color: #475569;
    font-weight: 500;
    font-size: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    border: 1px solid #e2e8f0;
    transition: all 0.3s;
}
.chasm-cat-item:hover, .chasm-cat-item.active {
    background: #0284c7;
    color: #ffffff;
    border-color: #0284c7;
    transform: translateY(-2px);
}
.chasm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.chasm-card {
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02), 0 2px 4px -1px rgba(0,0,0,0.02);
    display: flex;
    flex-direction: column;
    transition: all 0.3s;
}
.chasm-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.05);
}
.chasm-card-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background: #f8fafc;
    border-bottom: 1px solid #f1f5f9;
}
.chasm-card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    justify-content: space-between;
}
.chasm-card-title {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 8px;
    line-height: 1.4;
}
.chasm-card-desc {
    font-size: 13px;
    color: #64748b;
    margin: 0 0 16px;
    line-height: 1.5;
    height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.chasm-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f1f5f9;
    padding-top: 12px;
    margin-top: auto;
}
.chasm-price {
    font-size: 18px;
    color: #f43f5e;
    font-weight: 700;
}
.chasm-btn {
    background: #0284c7;
    color: #ffffff;
    padding: 8px 18px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.3s;
    border: none;
    cursor: pointer;
    text-align: center;
}
.chasm-btn:hover {
    background: #0369a1;
}
.chasm-btn-disabled {
    background: #cbd5e1;
    color: #94a3b8;
    cursor: not-allowed;
}
.chasm-detail-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}
@media (min-width: 992px) {
    .chasm-detail-layout {
        grid-template-columns: 7fr 3fr;
    }
}
.chasm-detail-left {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 24px;
}
.chasm-detail-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.chasm-detail-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 20px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}
.chasm-form-group {
    margin-bottom: 16px;
}
.chasm-form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: #475569;
}
.chasm-form-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
}
.chasm-form-input:focus {
    border-color: #0284c7;
}
.chasm-detail-title-box {
    background: #1e293b;
    border-radius: 12px;
    padding: 30px;
    color: #ffffff;
    margin-bottom: 30px;
}
.chasm-detail-title-box h1 {
    margin: 0 0 10px;
    font-size: 24px;
    font-weight: 700;
}
.chasm-detail-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: #94a3b8;
}
.chasm-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 40px;
    border-top: 1px solid #e2e8f0;
    padding-top: 30px;
}
.chasm-feature-card {
    background: #ffffff;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    padding: 20px;
    text-align: center;
}
.chasm-feature-card h4 {
    margin: 0 0 8px;
    font-size: 15px;
    color: #1e293b;
    font-weight: 600;
}
.chasm-feature-card p {
    margin: 0;
    font-size: 13px;
    color: #64748b;
    line-height: 1.4;
}
.chasm-footer {
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
    font-size: 13px;
    color: #64748b;
}
.chasm-footer-links {
    margin-bottom: 15px;
}
.chasm-footer-links a {
    color: #475569;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.3s;
}
.chasm-footer-links a:hover {
    color: #0284c7;
}
.chasm-query-box {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 30px;
    max-width: 600px;
    margin: 0 auto;
}
.chasm-query-tabs {
    display: flex;
    border-bottom: 2px solid #e2e8f0;
    margin-bottom: 20px;
}
.chasm-query-tab {
    flex: 1;
    text-align: center;
    padding: 12px;
    font-weight: 500;
    font-size: 14px;
    color: #64748b;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}
.chasm-query-tab.active {
    border-color: #0284c7;
    color: #0284c7;
    font-weight: 600;
}
.chasm-tips {
    background: #fffbeb;
    border: 1px solid #fde68a;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 13px;
    color: #b45309;
    line-height: 1.5;
}