:root {
    --primary-blue: #003366;
    --accent-gold: #D4AF37;
    --light-gold: #E6C567;
    --dark-gray: #212529;
    --medium-gray: #495057;
    --light-gray: #f8f9fa;
    --text-color: #343a40;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #ffffff;
    color: var(--text-color);
    line-height: 1.6;
    font-family: 'Roboto', sans-serif;
}

h1,
h2,
h3,
h4,
h5 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    background: white;
    z-index: 1000;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text h1 {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
    letter-spacing: -0.5px;
}

.logo-text span {
    font-size: 11px;
    letter-spacing: 1.5px;
    color: var(--medium-gray);
    font-weight: 500;
}

.language-selector {
    margin-left: 20px;
    font-size: 14px;
    color: var(--medium-gray);
    cursor: pointer;
    position: relative;
    padding: 5px 10px;
    border-radius: 4px;
    transition: var(--transition);
}

.language-selector:hover {
    background: var(--light-gray);
}

.search-bar {
    flex: 1;
    max-width: 500px;
    margin: 0 20px;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid #e0e0e0;
    border-radius: 30px;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.search-bar i {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--medium-gray);
}

.cart-icon {
    position: relative;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.cart-icon:hover {
    background: var(--light-gray);
}

.cart-icon i {
    font-size: 22px;
    color: var(--dark-gray);
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent-gold);
    color: white;
    font-size: 11px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Navigation */
nav {
    display: flex;
    align-items: center;
    padding: 10px 0;
    border-top: 1px solid #eee;
    position: relative;
}

.categories-btn {
    background: var(--primary-blue);
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    margin-right: 30px;
    position: relative;
    z-index: 100;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 51, 102, 0.15);
}

.categories-btn:hover {
    background: #002244;
    transform: translateY(-2px);
}

.categories-btn i {
    margin-right: 10px;
}

.categories-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 280px;
    background: white;
    box-shadow: var(--card-shadow);
    border-radius: 8px;
    padding: 15px 0;
    display: none;
    z-index: 999;
    border: 1px solid #f0f0f0;
}

.categories-btn:hover .categories-dropdown {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-item {
    position: relative;
}

.category-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 15px;
}

.category-link:hover {
    background: var(--light-gray);
    color: var(--primary-blue);
}

.category-link i {
    font-size: 12px;
    color: #999;
}

.sub-category {
    position: absolute;
    left: 100%;
    top: 0;
    width: 240px;
    background: white;
    box-shadow: var(--card-shadow);
    border-radius: 8px;
    padding: 15px 0;
    display: none;
    border: 1px solid #f0f0f0;
     /* 添加滚动功能 */
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
}

.category-item:hover .sub-category {
    display: block;
    animation: fadeIn 0.3s ease;
}

.sub-category-link {
    display: block;
    padding: 12px 24px;
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 14px;
}

.sub-category-link:hover {
    background: var(--light-gray);
    color: var(--primary-blue);
}

/* 自定义滚动条样式 */
.sub-category::-webkit-scrollbar {
    width: 6px;
}

.sub-category::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 0 4px 4px 0;
}

.sub-category::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.sub-category::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}


.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    margin-right: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
}

/* 修改：添加选中状态样式 */
.nav-menu a.active {
    color: var(--primary-blue);
}

.nav-menu a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: var(--transition);
}

.nav-menu a:hover:after,
.nav-menu a.active:after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--primary-blue);
}


/* Footer */
footer {
    background: var(--primary-blue);
    color: white;
    padding: 70px 0 30px;
    position: relative;
}

footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--accent-gold);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 20px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.footer-column h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background: var(--accent-gold);
    border-radius: 2px;
}

.footer-column p {
    color: #c2d1e5;
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 15px;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 14px;
}

.footer-column a {
    color: #c2d1e5;
    text-decoration: none;
    transition: var(--transition);
    font-size: 15px;
    display: flex;
    align-items: center;
}

.footer-column a i {
    margin-right: 10px;
    width: 20px;
    color: var(--accent-gold);
}

.footer-column a:hover {
    color: white;
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 15px;
    color: #a3b4cc;
}

/* 新增登录注册样式 */
.auth-container {
    position: relative;
    margin-left: 20px;
}

.auth-btn {
    background: transparent;
    border: none;
    color: var(--dark-gray);
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    padding: 8px 15px;
    border-radius: 6px;
    display: flex;
    align-items: center;
}

.auth-btn:hover {
    background: var(--light-gray);
    color: var(--primary-blue);
}

.auth-btn i {
    margin-right: 8px;
    font-size: 16px;
}

.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.auth-modal.active {
    opacity: 1;
    visibility: visible;
}

.auth-content {
    background: white;
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    transform: translateY(30px);
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.auth-modal.active .auth-content {
    transform: translateY(0);
}

.auth-tabs {
    display: flex;
    background: var(--light-gray);
}

.auth-tab {
    flex: 1;
    text-align: center;
    padding: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.auth-tab.active {
    color: var(--primary-blue);
    border-bottom: 3px solid var(--accent-gold);
    background: white;
}

.auth-form {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-gray);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 15px;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.auth-submit {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 14px;
    width: 100%;
    border-radius: 6px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.auth-submit:hover {
    background: #002244;
    transform: translateY(-2px);
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.auth-footer a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.close-auth {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
}

.user-profile {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-right: 8px;
}

.user-name {
    font-weight: 500;
    color: var(--dark-gray);
    font-size: 15px;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    box-shadow: var(--card-shadow);
    border-radius: 6px;
    width: 200px;
    padding: 10px 0;
    display: none;
    z-index: 100;
    border: 1px solid #f0f0f0;
}

.user-profile:hover .user-dropdown {
    display: block;
}

.dropdown-item {
    padding: 10px 20px;
    color: var(--dark-gray);
    text-decoration: none;
    display: block;
    transition: var(--transition);
    font-size: 15px;
}

.dropdown-item:hover {
    background: var(--light-gray);
    color: var(--primary-blue);
}

.dropdown-item i {
    margin-right: 10px;
    width: 18px;
    text-align: center;
}

.auth-error {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 5px;
    display: none;
}