/* css/header.css ==========================================================================
   2. 头部、导航与公共组件 (Hero Header)
   ========================================================================== */
.top-bar {
    background: #f4f4f5;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--muted);
}

.top-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--top-bar-inner-padding, 8px 20px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--top-bar-inner-gap, 16px);
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: var(--top-bar-actions-gap, 12px);
}

.top-bar .top-bar-brand-mobile {
    display: none;
}

.top-bar-login-text {
    display: none;
}


.top-bar-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border);
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    background: #fff;
    text-decoration: none;
    transition: 0.2s;
}

img.top-bar-avatar {
    object-fit: cover;
    background: #fff;
}

.top-bar-avatar:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}
.top-bar-user {
    color: var(--primary);
    font-weight: 600;
}

.top-user-menu {
    position: relative;
}

.top-user-menu__trigger {
    list-style: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.top-user-menu__trigger::-webkit-details-marker {
    display: none;
}

.top-user-menu__panel {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: var(--top-user-menu-min-width, 170px);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 6px;
    z-index: 200;
}

.top-user-menu__item {
    display: block;
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--primary);
    font-weight: 600;
}

.top-user-menu__item:hover {
    background: #f3f4f6;
    color: var(--accent);
}

.top-user-menu__item--danger {
    color: #b42318;
}

.top-bar-icon-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: #fff;
    font-size: var(--top-bar-icon-font-size, inherit);
    font-weight: var(--top-bar-icon-font-weight, inherit);
    transition: 0.2s;
}

.top-bar-icon-link svg {
    width: var(--top-bar-icon-svg-size, 20px);
    height: var(--top-bar-icon-svg-size, 20px);
    fill: currentColor;
}

.top-bar-icon-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    position: sticky;
    top: 0;
    z-index: var(--nav-container-z-index, 99);
    background: var(--nav-container-bg, rgba(255, 255, 255, 0.92));
    backdrop-filter: var(--nav-container-backdrop, blur(10px));
    display: flex;
    flex-direction: var(--nav-container-direction, row);
    align-items: var(--nav-container-align, center);
    justify-content: var(--nav-container-justify, center);
    gap: var(--nav-container-gap, 0);
    padding: var(--nav-container-padding, 12px 22px);
    border-top: var(--nav-container-border-top, 0);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.nav-container .nav-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-width: 0;
}

.nav-container .nav-links .nav-category {
    display: inline-flex;
}

.nav-container .nav-link {
    padding: 10px 12px;
    font-weight: 600;
    border-radius: 8px;
    color: var(--primary);
}

.nav-container .nav-link:hover {
    background: #f3f4f6;
    color: var(--accent);
}

.nav-container .nav-link.is-active {
    color: var(--accent);
    background: rgba(37, 99, 235, 0.12);
    border: 1px solid rgba(37, 99, 235, 0.3);
}

.nav-container .nav-link:focus-visible,
.nav-container .nav-search button:focus-visible,
.nav-container .nav-search input:focus-visible {
    outline: 2px solid rgba(200, 29, 37, 0.55);
    outline-offset: 2px;
}

.nav-container .nav-inner {
    width: 100%;
    max-width: 1200px;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav-container .nav-search {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 280px;
}

.nav-container .nav-search input {
    width: clamp(180px, 20vw, 280px);
    max-width: 100%;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 9px 12px;
    font-size: 0.9rem;
    background: #fff;
}

.nav-container .nav-search input:focus {
    outline: none;
    border-color: rgba(200, 29, 37, 0.5);
    box-shadow: 0 0 0 3px rgba(200, 29, 37, 0.12);
}

.nav-container .nav-search button {
    border: none;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    width: 42px;
    height: 42px;
    padding: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    line-height: 1;
}

.nav-container .nav-search button:hover {
    background: var(--accent-strong);
}

.nav-container .nav-search__icon {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.hero-header {
    background: var(--surface);
    color: var(--primary);
    padding: 28px 0 20px;
    border-bottom: 1px solid var(--border);
}