/* 
 * 头部导航样式 - 现代工业风格
 */

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.95);
    border-bottom-color: var(--border-light);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 3rem;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo img {
    height: 32px;
    width: auto;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* 导航 */
.nav-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-list li {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-secondary);
    background: var(--bg-card);
}

.nav-link.active {
    color: var(--accent-primary);
}

.nav-link i {
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

/* 下拉菜单 */
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.dropdown-menu a:hover {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
}

/* 右侧区域 */
.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-auth {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 联系图标 */
.contact-icons {
    display: flex;
    gap: 0.5rem;
}

.contact-item {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.contact-item:hover {
    border-color: var(--border-accent);
    color: var(--accent-primary);
}

.contact-tooltip {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.contact-item:hover .contact-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tooltip-content h4 {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tooltip-content p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin: 0;
}

.tooltip-content .qr-code {
    margin: 0.75rem 0;
    text-align: center;
}

.tooltip-content .qr-code img {
    max-width: 120px;
    border-radius: var(--radius-sm);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-menu-toggle:hover {
    border-color: var(--border-accent);
    color: var(--accent-primary);
}

/* ========== 移动端菜单 ========== */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 85%;
    max-width: 320px;
    height: 100%;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-light);
    z-index: 10001;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-menu-close:hover {
    color: var(--accent-primary);
    border-color: var(--border-accent);
}

.mobile-menu-nav {
    padding: 1rem;
}

.mobile-menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu-item {
    margin-bottom: 0.25rem;
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    font-weight: 500;
}

.mobile-menu-link:hover,
.mobile-menu-link.active {
    background: var(--bg-card);
    color: var(--accent-primary);
}

.mobile-menu-submenu {
    list-style: none;
    padding-left: 1rem;
    margin: 0;
}

.mobile-menu-submenu .mobile-menu-link {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .header .nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .contact-icons {
        display: none;
    }
}

@media (max-width: 640px) {
    .header-content {
        height: 64px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .mobile-menu {
        width: 100%;
        max-width: 100%;
    }
}

/* ========== 登录按钮 ========== */
.header-auth .btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.header-auth .btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.header-auth .btn-ghost {
    color: var(--text-secondary);
    border-color: transparent;
}

.header-auth .btn-ghost:hover {
    color: var(--accent-primary);
    background: var(--bg-card);
}