/**
 * 自定义页头
 * 独立于 DZ common/header 的 BlokeAI 导航
 */

.blk-header {
    position: sticky;
    top: 0;
    z-index: 100; /* sticky header 保持在内容上方，nav 在移动端会移到 body 下独立控制层级 */
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--blk-border);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
    transition: background var(--blk-transition-slow), box-shadow var(--blk-transition-slow);
}

.blk-header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

/* Logo */
.blk-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.blk-logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

/* Logo 图片（仅图形） */
.blk-logo img {
    height: 40px;
    width: auto;
    max-width: 48px;
    object-fit: contain;
}

/* Logo 文字 */
.blk-logo-text {
    font-size: 21px;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.blk-logo-text .text-gradient {
    background: linear-gradient(135deg, #FF4D00 0%, #FF6A2B 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Nav */
.blk-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.blk-nav-item {
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--blk-text-gray);
    text-decoration: none;
    border-radius: var(--blk-radius-md);
    transition: all var(--blk-transition);
    position: relative;
}

.blk-nav-item:hover {
    color: var(--blk-primary);
    background: var(--blk-primary-bg);
}

.blk-nav-item.blk-active {
    color: var(--blk-primary);
    background: var(--blk-primary-bg);
}

.blk-nav-item.blk-active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 3px;
    background: var(--blk-primary);
    border-radius: 2px;
}

/* 导航主转化按钮：下载启航 Code */
.blk-nav-item.blk-nav-cta {
    background: var(--blk-primary-gradient);
    color: #fff !important;
    font-weight: 600;
    padding: 9px 20px;
    margin-left: 10px;
    border-radius: var(--blk-radius-md);
    box-shadow: 0 2px 8px var(--blk-primary-shadow);
}

.blk-nav-item.blk-nav-cta:hover {
    color: #fff;
    background: linear-gradient(135deg, #E03D00, #FF4D00);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(232, 96, 10, 0.35);
}

.blk-nav-item.blk-nav-cta::after {
    display: none;
}

/* User Area */
.blk-user {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.blk-btn-login {
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--blk-primary);
    background: var(--blk-primary-bg);
    border: 1px solid var(--blk-primary-border);
    border-radius: var(--blk-radius-md);
    text-decoration: none;
    transition: all var(--blk-transition);
}

.blk-btn-login:hover {
    background: rgba(232, 96, 10, 0.15);
    border-color: rgba(232, 96, 10, 0.3);
}

.blk-btn-register {
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--blk-primary-gradient);
    border: none;
    border-radius: var(--blk-radius-md);
    text-decoration: none;
    transition: all var(--blk-transition);
    box-shadow: 0 2px 8px var(--blk-primary-shadow);
}

.blk-btn-register:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(232, 96, 10, 0.35);
}

/* User Dropdown */
.blk-user-dropdown {
    position: relative;
    cursor: pointer;
}

.blk-user-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px 6px 6px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.02);
    transition: background var(--blk-transition);
}

.blk-user-trigger:hover {
    background: rgba(0, 0, 0, 0.04);
}

.blk-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
    border: 2px solid rgba(232, 96, 10, 0.2);
}

.blk-username {
    font-size: 14px;
    font-weight: 500;
    color: var(--blk-text-dark);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.blk-arrow {
    font-size: 10px;
    color: var(--blk-text-light);
    margin-left: 2px;
}

.blk-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #fff;
    border-radius: var(--blk-radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    min-width: 200px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--blk-transition);
    z-index: 1001;
}

.blk-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.blk-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--blk-text-dark);
    text-decoration: none;
    transition: background 0.15s;
}

.blk-dropdown-item:hover {
    background: var(--blk-primary-bg);
    color: var(--blk-primary);
}

.blk-dropdown-icon {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.blk-dropdown-divider {
    height: 1px;
    background: rgba(0, 0, 0, 0.06);
    margin: 6px 12px;
}

.blk-dropdown-item.logout {
    color: #e17055;
}

.blk-dropdown-item.logout:hover {
    background: rgba(225, 112, 85, 0.06);
}



.blk-dropdown-badge {
    background: #ef4444;
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 10px;
    margin-left: auto;
    min-width: 18px;
    text-align: center;
}

/* 移动端汉堡菜单按钮（桌面端默认隐藏） */
.blk-mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1002;
}

.blk-mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--blk-text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 响应式 */
@media (max-width: 768px) {
    .blk-header-inner {
        padding: 0 16px;
        height: 56px;
    }
    
    /* 移动端显示汉堡菜单按钮 */
    .blk-mobile-menu-btn {
        display: flex;
    }
    
    .blk-mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .blk-mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .blk-mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .blk-nav {
        position: fixed !important;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: stretch;
        padding: 20px 16px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 9999 !important;
    }
    
    .blk-nav.open {
        display: flex !important;
        transform: translateX(0) !important;
        z-index: 9999 !important;
    }
    
    .blk-nav-item {
        padding: 14px 16px;
        font-size: 16px;
        border-radius: 10px;
        text-align: center;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .blk-btn-login,
    .blk-btn-register {
        padding: 6px 14px;
        font-size: 13px;
    }
    
    .blk-username {
        max-width: 60px;
    }
    
    /* 移动端登录面板 - 默认隐藏，JS控制显示 */
    .blk-mobile-login {
        display: none;
    }
    
    .blk-mobile-login.is-visible {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        display: flex !important;
        align-items: center;
        justify-content: center;
        z-index: 10001;
        padding: 16px;
    }
    
    .blk-mobile-login-inner {
        background: #fff;
        border-radius: 16px;
        padding: 32px 24px;
        width: 100%;
        max-width: 360px;
        box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    }
    
    .blk-mobile-login-inner h3 {
        font-size: 20px;
        font-weight: 700;
        color: #0F172A;
        margin: 0 0 24px;
        text-align: center;
    }
    
    .blk-mobile-input {
        display: block;
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
        border: 1px solid #e2e8f0;
        border-radius: 10px;
        margin-bottom: 12px;
        box-sizing: border-box;
        outline: none;
        transition: border-color 0.2s;
    }
    
    .blk-mobile-input:focus {
        border-color: #FF4D00;
        box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.1);
    }
    
    .blk-mobile-submit {
        display: block;
        width: 100%;
        padding: 14px;
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        background: linear-gradient(135deg, #FF4D00, #FF6A2B);
        border: none;
        border-radius: 10px;
        cursor: pointer;
        margin-top: 8px;
        transition: transform 0.2s, box-shadow 0.2s;
    }
    
    .blk-mobile-submit:active {
        transform: scale(0.98);
    }
    
    .blk-mobile-login-links {
        text-align: center;
        margin-top: 16px;
        font-size: 14px;
    }
    
    .blk-mobile-login-links a {
        color: #FF4D00;
        text-decoration: none;
    }
    
    .blk-mobile-login-links span {
        color: #ccc;
        margin: 0 8px;
    }
}

/* 顶部用户区充值入口 */
.blk-user-recharge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    margin-right: 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--blk-primary);
    background: var(--blk-primary-bg);
    border: 1px solid var(--blk-primary-border);
    border-radius: var(--blk-radius-md);
    text-decoration: none;
    white-space: nowrap;
    transition: background .2s, border-color .2s;
}
.blk-user-recharge:hover {
    background: rgba(232, 96, 10, 0.15);
    border-color: rgba(232, 96, 10, 0.3);
}
@media (max-width: 768px) {
    .blk-user-recharge { padding: 5px 9px; font-size: 12px; margin-right: 6px; }
    .blk-nav-item.blk-nav-cta { text-align: center; margin: 8px 16px 4px; border-radius: 10px; }
}

/* 下拉菜单图标（统一线性 SVG） */
.blk-dropdown-icon svg {
    display: block;
    width: 15px;
    height: 15px;
    margin: 2px auto 0;
}