/* ========== 统一导航栏样式 ========== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
    --nav-primary: #4F46E5;
    --nav-primary-light: #818CF8;
    --nav-primary-dark: #3730A3;
    --nav-accent: #F59E0B;
    --nav-dark: #111827;
    --nav-gray-50: #F9FAFB;
    --nav-gray-100: #F3F4F6;
    --nav-gray-600: #4B5563;
    --nav-gray-700: #374151;
}

/* 导航栏容器 */
.navbar-custom {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    padding: 14px 0;
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}

/* Flex布局辅助类 */
.navbar-custom .d-flex {
    display: flex;
}

.navbar-custom .justify-content-between {
    justify-content: space-between;
}

.navbar-custom .align-items-center {
    align-items: center;
}

.navbar-custom.scrolled {
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.navbar-custom .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 品牌Logo */
.navbar-custom .brand {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--nav-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.5px;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.navbar-custom .brand:hover {
    transform: scale(1.02);
}

.brand-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--nav-primary), var(--nav-primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(79,70,229,0.3);
    transition: transform 0.3s;
}

.navbar-custom .brand:hover .brand-icon {
    transform: rotate(-10deg) scale(1.05);
}

/* 导航链接容器 */
.navbar-custom .nav-links {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: nowrap;
    flex-shrink: 0;
}

/* 导航链接 */
.navbar-custom .nav-links a {
    color: var(--nav-gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 8px 16px;
    border-radius: 10px;
    transition: all 0.25s ease;
    position: relative;
    white-space: nowrap;
}

.navbar-custom .nav-links a:hover {
    color: var(--nav-primary);
    background: rgba(79,70,229,0.05);
}

.navbar-custom .nav-links a.active {
    color: var(--nav-primary);
    background: rgba(79,70,229,0.1);
    font-weight: 600;
}

/* VIP链接特殊样式 */
.navbar-custom .nav-links .nav-vip {
    color: var(--nav-accent) !important;
    font-weight: 600;
}

.navbar-custom .nav-links .nav-vip:hover {
    background: rgba(245,158,11,0.08);
}

/* 登录按钮 */
.navbar-custom .nav-btn {
    background: linear-gradient(135deg, var(--nav-primary), var(--nav-primary-light)) !important;
    color: white !important;
    padding: 10px 24px !important;
    border-radius: 12px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 14px rgba(79,70,229,0.35);
    transition: all 0.3s !important;
}

.navbar-custom .nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79,70,229,0.4) !important;
}

/* 用户下拉菜单 */
.navbar-custom .nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--nav-gray-700);
    font-weight: 500;
    font-size: 0.92rem;
    padding: 8px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
}

.navbar-custom .nav-user:hover {
    color: var(--nav-primary);
    background: rgba(79,70,229,0.05);
}

.navbar-custom .nav-user i {
    font-size: 1.2rem;
}

/* 用户下拉菜单展开 */
.nav-user-dropdown {
    position: relative;
}

.nav-user-dropdown .dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: white;
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    border: 1px solid rgba(0,0,0,0.06);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.25s ease;
    z-index: 1001;
}

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

.nav-user-dropdown .dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--nav-gray-700);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.nav-user-dropdown .dropdown-menu a:hover {
    background: rgba(79,70,229,0.05);
    color: var(--nav-primary);
}

.nav-user-dropdown .dropdown-menu a.text-danger {
    color: #EF4444;
}

.nav-user-dropdown .dropdown-menu a.text-danger:hover {
    background: rgba(239,68,68,0.05);
}

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

/* 移动端菜单按钮 */
.navbar-custom .navbar-toggler {
    display: none;
    border: none;
    padding: 8px;
    background: rgba(79,70,229,0.08);
    border-radius: 10px;
    transition: all 0.3s;
}

.navbar-custom .navbar-toggler:hover {
    background: rgba(79,70,229,0.15);
}

.navbar-custom .navbar-toggler-icon {
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(79, 70, 229, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* 搜索按钮 */
.nav-search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: none;
    background: rgba(79,70,229,0.06);
    color: var(--nav-gray-600);
    cursor: pointer;
    transition: all 0.25s ease;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.nav-search-btn:hover {
    background: rgba(79,70,229,0.12);
    color: var(--nav-primary);
}

/* 搜索面板 */
.nav-search-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.45);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 80px;
}
.nav-search-panel.active {
    opacity: 1;
    visibility: visible;
}
.nav-search-box {
    background: #fff;
    border-radius: 16px;
    width: 680px;
    max-width: 90vw;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    overflow: hidden;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}
.nav-search-panel.active .nav-search-box {
    transform: translateY(0);
}
.nav-search-input-wrap {
    display: flex;
    align-items: center;
    padding: 20px 24px;
    gap: 12px;
    border-bottom: 1px solid #f0f0f0;
}
.nav-search-input-wrap i {
    font-size: 20px;
    color: #999;
    flex-shrink: 0;
}
.nav-search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    color: #333;
    background: transparent;
}
.nav-search-input::placeholder {
    color: #bbb;
}
.nav-search-submit {
    padding: 8px 24px;
    background: linear-gradient(135deg, var(--nav-primary), var(--nav-primary-light));
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
    flex-shrink: 0;
}
.nav-search-submit:hover { opacity: 0.9; }
.nav-search-hot {
    padding: 16px 24px;
}
.nav-search-hot h4 {
    font-size: 13px;
    color: #999;
    margin-bottom: 10px;
    font-weight: 500;
}
.nav-search-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.nav-search-tags a {
    display: inline-block;
    padding: 5px 14px;
    background: #f5f5f5;
    border-radius: 20px;
    font-size: 13px;
    color: #666;
    transition: all 0.2s;
}
.nav-search-tags a:hover {
    background: rgba(79,70,229,0.08);
    color: var(--nav-primary);
}
.nav-search-close {
    position: absolute;
    top: 20px;
    right: 24px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.9);
    color: #666;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.nav-search-close:hover {
    background: #fff;
    color: #333;
}

/* 响应式 */
@media (max-width: 992px) {
    .navbar-custom .navbar-toggler {
        display: block;
    }

    .navbar-custom .nav-links {
        display: none;
    }

    .navbar-custom.show .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: 16px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        border-radius: 0 0 20px 20px;
        gap: 4px;
    }

    .navbar-custom .nav-links a {
        padding: 12px 16px;
        width: 100%;
    }

    .navbar-custom .nav-btn {
        margin-top: 8px;
        text-align: center;
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .navbar-custom {
        padding: 12px 0;
    }

    .navbar-custom .brand {
        font-size: 1.15rem;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}