/**
 * 全站顶部导航
 * 依据：社区整站PC端UI设计规范标准
 */
:root {
    --site-orange: var(--color-primary);
    --site-orange-deep: var(--color-primary-hover);
    --site-orange-soft: var(--color-primary-soft);
    --site-ink: var(--color-ink);
    --site-muted: var(--color-muted);
    --site-surface: var(--color-surface);
    --site-shadow: var(--shadow-card-hover);
    --site-wrap: var(--layout-max);
    --site-header-h: 64px;
    --site-font: var(--font-sans);
    --site-display: var(--font-sans);
}

.site-wrap {
    width: min(100% - (var(--layout-gap-x) * 2), var(--site-wrap));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-line);
    font-family: var(--site-font);
}

.site-header-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: var(--site-header-h);
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    font-family: var(--site-display);
    font-weight: 700;
    font-size: var(--fs-title);
    line-height: var(--lh-title);
    color: var(--site-ink);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}

.site-logo:hover,
.site-logo:focus {
    color: var(--color-primary);
    text-decoration: none;
}

.site-logo-mark {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, var(--color-sage) 0%, var(--color-terracotta) 55%, var(--color-primary-hover) 100%);
    box-shadow: 0 4px 12px rgba(195, 122, 103, 0.28);
    flex-shrink: 0;
}

.site-logo-img {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-md);
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(43, 45, 66, 0.12);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 2px;
    flex-wrap: wrap;
    min-width: 0;
}

.site-nav a {
    position: relative;
    padding: 7px 8px;
    font-size: 13px;
    line-height: var(--lh-aux);
    color: var(--site-muted);
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease);
}

.site-nav a:hover,
.site-nav a:focus {
    color: var(--site-ink);
    background: var(--color-primary-soft);
    text-decoration: none;
}

.site-nav a.is-active {
    color: var(--color-primary);
    font-weight: 600;
}

.site-nav a.is-active::after {
    content: "";
    position: absolute;
    left: 8px;
    right: 8px;
    bottom: 1px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-primary);
    transition: left var(--duration) var(--ease), right var(--duration) var(--ease);
}

.site-utils {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.site-util-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--site-ink);
    text-decoration: none;
    transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.site-util-btn:hover,
.site-util-btn:focus {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    text-decoration: none;
}

.site-util-btn {
    position: relative;
}

.site-util-badge {
    position: absolute;
    top: -2px;
    right: -4px;
    z-index: 2;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: #E25555;
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    line-height: 16px;
    text-align: center;
    box-sizing: border-box;
    pointer-events: none;
    display: none;
}

.site-util-badge.is-on {
    display: inline-block;
}

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

.site-user {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 4px 2px 2px;
    border-radius: var(--radius-md);
    border: 0;
    background: none;
    cursor: pointer;
    color: inherit;
    font: inherit;
    transition: background-color var(--duration) var(--ease);
}

.site-user:hover {
    background: var(--color-primary-soft);
}

.site-user img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-page);
    display: block;
}

.site-user svg {
    color: var(--site-muted);
}

.site-user-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 180px;
    padding: 8px 0;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card-hover);
    border: 1px solid var(--color-line);
    z-index: 1040;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.site-user-dropdown.is-open {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.site-user-dropdown a {
    display: block;
    padding: 9px 16px;
    font-size: var(--fs-aux);
    line-height: var(--lh-aux);
    color: var(--site-ink);
    text-decoration: none;
    transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.site-user-dropdown a:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

.site-user-dropdown hr {
    margin: 6px 0;
    border: 0;
    border-top: 1px solid var(--color-line);
}

.site-login,
.site-register {
    padding: 7px 14px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.site-login {
    color: var(--site-ink);
}

.site-login:hover {
    color: var(--color-primary);
    background: var(--color-primary-soft);
    text-decoration: none;
}

.site-register {
    background: var(--color-primary);
    color: #fff !important;
}

.site-register:hover {
    background: var(--color-primary-hover);
    color: #fff !important;
    text-decoration: none;
}

.site-register:active {
    opacity: 0.9;
}

.site-publish {
    padding: 7px 14px;
    font-size: 13px;
    white-space: nowrap;
}

@media (max-width: 1100px) {
    .site-publish {
        display: none;
    }
}

.site-nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    margin-left: auto;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    border: 0;
    background: none;
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius-md);
}

.site-nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--site-ink);
    border-radius: 2px;
    transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.site-nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.site-nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

body {
    padding-top: 0 !important;
}

body.is-home main.content {
    padding: 0 0 var(--site-footer-h, 74px);
    overflow-x: hidden;
    min-height: calc(100vh - var(--site-header-h));
}

@media (max-width: 1100px) {
    .site-nav a {
        padding: 6px 6px;
        font-size: 12px;
    }
}

@media (max-width: 960px) {
    .site-nav-toggle {
        display: inline-flex;
        order: 2;
    }

    .site-utils {
        order: 3;
    }

    .site-nav {
        display: none;
        position: absolute;
        left: 16px;
        right: 16px;
        top: var(--site-header-h);
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        background: var(--color-surface);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card-hover);
        border: 1px solid var(--color-line);
        max-height: calc(100vh - var(--site-header-h) - 24px);
        overflow-y: auto;
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        padding: 10px 12px;
        font-size: 14px;
    }

    .site-nav a.is-active::after {
        display: none;
    }

    .site-nav a.is-active {
        background: var(--color-primary-soft);
    }

    .site-header-inner {
        position: relative;
        flex-wrap: wrap;
    }

    .site-logo-text {
        max-width: 8em;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}