/* ===== 导航栏样式 ===== */
.navbar {
    background-color: #F5F7FA;
    box-shadow: none;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    width: 140px;
    height: 50px;
    transition: var(--transition);
}

.logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo:hover {
    opacity: 0.85;
}

/* 隐藏文本logo，作为fallback */
.logo .logo-cn,
.logo .logo-en {
    display: none;
}

/* 导航菜单 */
.nav-menu {
    flex: 1;
    margin: 0 40px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: 8px;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--brand-color);
    background-color: rgba(114, 112, 83, 0.08);
}

.dropdown-icon {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.nav-item:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--bg-white);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    padding: 8px 0;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background-color: var(--bg-light);
    color: var(--brand-color);
    padding-left: 24px;
}

/* 导航操作区 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.consult-btn {
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 700;
    color: white;
    background: #303133;
    border: 2px solid #303133;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(48, 49, 51, 0.2);
    letter-spacing: 0.5px;
}

.consult-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(48, 49, 51, 0.3);
    background: #4a4a4a;
}

/* 按钮在页面头部等增强效果 */
.page-header .consult-btn,
.hero-section .consult-btn {
    box-shadow: 0 4px 16px rgba(48, 49, 51, 0.25);
}

.page-header .consult-btn:hover,
.hero-section .consult-btn:hover {
    box-shadow: 0 6px 20px rgba(48, 49, 51, 0.35);
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    z-index: 999;
}

.mobile-menu.active {
    display: block;
}

.mobile-nav-list {
    padding: 16px;
}

.mobile-nav-list > li {
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-list > li:last-child {
    border-bottom: none;
}

.mobile-nav-list > li > a,
.mobile-nav-list > li > span {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.mobile-nav-list > li > span {
    cursor: pointer;
    position: relative;
}

.mobile-has-submenu {
    position: relative;
}

.mobile-submenu {
    display: none;
    background-color: var(--bg-light);
    border-radius: 4px;
    margin: 8px 0;
    overflow: hidden;
}

.mobile-has-submenu.active .mobile-submenu {
    display: block;
}

.mobile-submenu li {
    border-bottom: 1px solid var(--border-color);
}

.mobile-submenu li:last-child {
    border-bottom: none;
}

.mobile-submenu a {
    display: block;
    padding: 12px 16px 12px 32px;
    font-size: 14px;
    color: var(--text-secondary);
}

.mobile-submenu a:hover {
    color: var(--primary-color);
    background-color: rgba(48, 49, 51, 0.08);
}

/* 响应式 */
@media (max-width: 1024px) {
    .nav-menu {
        margin: 0 20px;
    }

    .nav-link {
        padding: 8px 12px;
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        height: 60px;
    }

    .logo-cn {
        font-size: 18px;
    }

    .logo-en {
        font-size: 11px;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .consult-btn {
        display: none;
    }

    .mobile-menu {
        top: 60px;
    }
}

@media (max-width: 480px) {
    .logo-cn {
        font-size: 16px;
    }

    .logo-en {
        font-size: 10px;
    }
}