/* SYHUO 全站共享头部样式 */
.syhuo-navbar {
    background: #fff;
    border-bottom: 2px solid #ff6700;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.syhuo-navbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 56px;
    padding: 0 20px;
    gap: 24px;
}
.syhuo-logo {
    text-decoration: none;
    flex-shrink: 0;
}
.syhuo-logo .logo-text {
    font-size: 22px;
    font-weight: 900;
    color: #ff6700;
    letter-spacing: 1px;
    font-family: 'Arial Black', 'Franklin Gothic Heavy', 'Segoe UI Black', Arial, 'Microsoft YaHei', sans-serif;
}
.syhuo-nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}
.syhuo-nav-item {
    padding: 6px 14px;
    font-size: 14px;
    color: #333;
    text-decoration: none;
    border-radius: 4px;
    transition: background .15s, color .15s;
}
.syhuo-nav-item:hover {
    background: #fff3e6;
    color: #ff6700;
}
.syhuo-nav-item.active {
    background: #ff6700;
    color: #fff;
    font-weight: 500;
}
.syhuo-nav-right {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}
.syhuo-user {
    font-size: 13px;
    color: #555;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: color .15s;
}
.syhuo-user:hover {
    color: #ff6700;
}
.syhuo-logout-btn {
    margin-left: 12px;
    font-size: 13px;
    color: #999;
    text-decoration: none;
    transition: color .15s;
}
.syhuo-logout-btn:hover {
    color: #ff6700;
}
.syhuo-login-btn {
    padding: 5px 16px;
    font-size: 13px;
    color: #ff6700;
    border: 1px solid #ff6700;
    border-radius: 4px;
    text-decoration: none;
    transition: background .15s, color .15s;
}
.syhuo-login-btn:hover {
    background: #ff6700;
    color: #fff;
}
.syhuo-register-btn {
    margin-left: 10px;
    padding: 5px 16px;
    font-size: 13px;
    color: #fff;
    background: #ff6700;
    border: 1px solid #ff6700;
    border-radius: 4px;
    text-decoration: none;
    transition: background .15s, border-color .15s;
}
.syhuo-register-btn:hover {
    background: #e55c00;
    border-color: #e55c00;
}
.syhuo-main {
    min-height: calc(100vh - 56px - 60px);
}
/* 页脚样式 */
.syhuo-footer {
    background: #262626;
    color: #999;
    font-size: 14px;
    border-top: 3px solid #ff6700;
}
.syhuo-footer a {
    color: #999;
    text-decoration: none;
    transition: color .2s ease;
}
.syhuo-footer a:hover {
    color: #ff6700;
}
.sf-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.sf-cols {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding: 44px 0 36px;
}
.sf-brand .sf-logo {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
    line-height: 1;
}
.sf-brand .sf-slogan {
    color: #ff6700;
    font-size: 13px;
    margin-top: 8px;
    letter-spacing: 1px;
}
.sf-brand .sf-desc {
    color: #888;
    font-size: 13px;
    line-height: 1.9;
    margin: 16px 0;
    max-width: 320px;
}
.sf-brand .sf-hotline {
    color: #aaa;
    font-size: 13px;
}
.sf-brand .sf-hotline i {
    color: #ff6700;
    margin-right: 6px;
}
.sf-title {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 18px;
}
.sf-col a {
    display: block;
    font-size: 13px;
    line-height: 2.0;
}
.sf-col a:hover {
    padding-left: 4px;
}
.sf-nav-2col {
    column-count: 2;
    column-gap: 24px;
}
.sf-nav-2col a {
    break-inside: avoid;
}
.sf-bottom {
    border-top: 1px solid #383838;
    padding: 18px 0 22px;
    text-align: center;
    font-size: 12px;
    color: #777;
}
.sf-links {
    margin-bottom: 8px;
}
.sf-links a {
    color: #999;
    margin: 0 6px;
}
.sf-dot {
    color: #555;
    margin: 0 2px;
}
.sf-copyright {
    color: #777;
}
.sf-copyright a {
    color: #888;
    margin-left: 6px;
}
@media (max-width: 992px) {
    .sf-cols {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        padding: 36px 0 28px;
    }
}
@media (max-width: 576px) {
    .sf-cols {
        grid-template-columns: 1fr;
        gap: 26px;
        text-align: center;
    }
    .sf-brand .sf-desc {
        max-width: none;
    }
}
/* 移动端适配 */
@media (max-width: 768px) {
    .syhuo-navbar-inner {
        gap: 12px;
    }
    .syhuo-nav-item {
        padding: 5px 10px;
        font-size: 13px;
    }
    .syhuo-logo .logo-text {
        font-size: 18px;
    }
}