/* ================================
   全局顶部导航栏样式
   ================================ */

.global-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #4f58c4 0%, #6974d9 100%);
    padding: 10px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 14px 28px rgba(58, 66, 160, 0.15);
}

body.has-global-nav {
    padding-top: 62px;
}

.global-nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: #ffffff;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.4px;
    transition: opacity 0.3s ease;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.16);
    font-size: 15px;
}

.logo-text {
    font-weight: 700;
}

.global-nav-logo:hover {
    opacity: 0.92;
}

.global-nav-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.global-nav-dropdown {
    position: relative;
}

.global-nav-dropdown-btn {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.global-nav-dropdown-btn:hover {
    background: rgba(255, 255, 255, 0.22);
}

.global-nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 14px 35px rgba(36, 38, 94, 0.18);
    min-width: 200px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

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

.global-nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: #313752;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.22s ease;
}

.global-nav-dropdown-item:hover {
    background: #f2f4ff;
}

.global-nav-dropdown-item.current {
    background: linear-gradient(135deg, #5560da 0%, #7380ff 100%);
    color: #ffffff;
    font-weight: 600;
}

.global-nav-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 6px;
    transition: all 0.25s ease;
}

.global-nav-link:hover {
    background: rgba(255, 255, 255, 0.16);
    color: #ffffff;
}

.subtle-link {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.subtle-link:hover {
    background: rgba(255, 255, 255, 0.14);
}

.global-nav-buttons,
.global-nav-user-menu {
    display: flex;
    gap: 10px;
    align-items: center;
}

.global-nav-btn {
    padding: 6px 16px;
    border-radius: 18px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    text-decoration: none;
    border: none;
    white-space: nowrap;
}

.global-nav-btn-login {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.28);
}

.global-nav-btn-login:hover {
    background: rgba(255, 255, 255, 0.26);
}

.global-nav-btn-register {
    background: #ffffff;
    color: #5e6ae0;
    border: 1px solid #ffffff;
}

.global-nav-btn-register:hover {
    background: #f5f6ff;
}

.global-nav-btn-outline {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.28);
}

.global-nav-btn-outline:hover {
    background: rgba(255, 255, 255, 0.24);
}

.global-nav-btn-vip {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: none;
}

.global-nav-btn-vip:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.global-nav-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    cursor: pointer;
    color: #5c66d0;
    font-weight: 600;
}

.global-nav-user-name {
    color: #ffffff;
    font-weight: 500;
    font-size: 14px;
}

.global-nav-btn-logout {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.24);
    padding: 6px 14px;
    font-size: 13px;
}

.global-nav-btn-logout:hover {
    background: rgba(255, 255, 255, 0.18);
}

@media (max-width: 768px) {
    .global-nav {
        padding: 10px 16px;
    }

    .global-nav-logo {
        font-size: 16px;
    }

    .global-nav-dropdown-menu {
        right: 0;
        left: auto;
        min-width: 180px;
    }

    .global-nav-buttons {
        gap: 6px;
    }

    .global-nav-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .global-nav-user-name {
        display: none;
    }
}

@media (max-width: 480px) {
    .global-nav-btn {
        padding: 5px 10px;
        font-size: 12px;
    }

    .global-nav-user-avatar {
        width: 30px;
        height: 30px;
        font-size: 13px;
    }
}