:root {
    --color-black: #0a0a0a;
    --color-dark-gray: #1a1a1a;
    --color-gray: #2a2a2a;
    --color-light-gray: #8a8a8a;
    --color-gold: #d4af37;
    --color-gold-light: #f4d03f;
    --color-gold-dark: #b8941f;
    --color-white: #ffffff;
    --color-off-white: #f5f5f5;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.6;
}

a {
    color: var(--color-gold);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-gold-light);
}

.navbar {
    background-color: var(--color-dark-gray);
    border-bottom: 2px solid var(--color-gold);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-gold);
    display: flex;
    align-items: center;
}

.navbar-brand img {
    height: 40px;
    width: auto;
    max-height: 40px;
    object-fit: contain;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 30px;
}

.navbar-nav a {
    color: var(--color-white);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--color-gold);
    background-color: var(--color-gray);
}

.navbar-search {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 20px;
}

.navbar-search input[type="text"] {
    padding: 8px 15px;
    border: 1px solid var(--color-gray);
    border-radius: 4px;
    background-color: var(--color-gray);
    color: var(--color-white);
    font-size: 0.9rem;
    min-width: 200px;
    transition: border-color 0.3s ease;
}

.navbar-search input[type="text"]:focus {
    outline: none;
    border-color: var(--color-gold);
}

.navbar-search button {
    padding: 8px 20px;
    background-color: var(--color-gold);
    color: var(--color-black);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.navbar-search button:hover {
    background-color: var(--color-gold-light);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 0.95rem;
}

.btn-gold {
    background-color: var(--color-gold);
    color: var(--color-black);
}

.btn-gold:hover {
    background-color: var(--color-gold-light);
    color: var(--color-black);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-gold);
    color: var(--color-gold);
}

.btn-outline:hover {
    background-color: var(--color-gold);
    color: var(--color-black);
}

.main-container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
    display: flex;
    gap: 30px;
}

.content-wrapper {
    flex: 0 0 80%;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    width: 100%;
}

.sidebar-wrapper {
    flex: 0 0 20%;
}

.hero {
    background: linear-gradient(135deg, var(--color-dark-gray) 0%, var(--color-black) 100%);
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid var(--color-gray);
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--color-gold);
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-light-gray);
}

.article-card {
    background-color: var(--color-dark-gray);
    border-radius: 8px;
    padding: 25px;
    border-left: 3px solid var(--color-gold);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.1);
}

.article-card h2 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.article-card h2 a {
    color: var(--color-white);
}

.article-card h2 a:hover {
    color: var(--color-gold);
}

.article-meta {
    color: var(--color-light-gray);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.article-excerpt {
    color: var(--color-light-gray);
    line-height: 1.8;
}

.sidebar-widget {
    background-color: var(--color-dark-gray);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
}

.sidebar-widget h3 {
    color: var(--color-gold);
    font-size: 1.2rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-gray);
}

.ad-item {
    margin-bottom: 20px;
}

.ad-item:last-child {
    margin-bottom: 0;
}

.ad-item img {
    width: 100%;
    border-radius: 4px;
    margin-bottom: 10px;
}

.ad-item h4 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.ad-item p {
    color: var(--color-light-gray);
    font-size: 0.9rem;
}

.article-detail {
    background-color: var(--color-dark-gray);
    border-radius: 8px;
    padding: 40px;
}

.article-detail h1 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--color-gold);
}

.article-content {
    margin-top: 30px;
    line-height: 1.9;
    font-size: 1.05rem;
}

.article-content img {
    max-width: 100%;
    border-radius: 4px;
    margin: 20px 0;
}

.comment-section {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--color-gray);
}

.comment-section h3 {
    color: var(--color-gold);
    margin-bottom: 25px;
}

.comment-form {
    margin-bottom: 30px;
}

.comment-form textarea {
    width: 100%;
    background-color: var(--color-gray);
    border: 1px solid var(--color-gray);
    color: var(--color-white);
    padding: 15px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--color-gold);
}

.comment-item {
    background-color: var(--color-gray);
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.comment-author {
    color: var(--color-gold);
    font-weight: 600;
    margin-bottom: 8px;
}

.comment-date {
    color: var(--color-light-gray);
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.form-container {
    max-width: 500px;
    margin: 60px auto;
    background-color: var(--color-dark-gray);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--color-gray);
}

.form-container h2 {
    color: var(--color-gold);
    text-align: center;
    margin-bottom: 30px;
}

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

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

.form-group input,
.form-group select {
    width: 100%;
    background-color: var(--color-gray);
    border: 1px solid var(--color-gray);
    color: var(--color-white);
    padding: 12px 15px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-gold);
}

.form-group .btn {
    width: 100%;
    margin-top: 10px;
}

.asset-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.asset-table th,
.asset-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--color-gray);
}

.asset-table th {
    background-color: var(--color-gray);
    color: var(--color-gold);
    font-weight: 600;
}

.asset-table tr:hover {
    background-color: rgba(212, 175, 55, 0.05);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--color-gray);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-gold-dark), var(--color-gold-light));
    transition: width 0.5s ease;
}

.footer {
    background-color: var(--color-dark-gray);
    border-top: 1px solid var(--color-gray);
    padding: 40px 20px;
    margin-top: 60px;
    text-align: center;
}

.footer p {
    color: var(--color-light-gray);
}

.user-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--color-gray);
}

.user-tab {
    padding: 12px 25px;
    background-color: transparent;
    border: none;
    color: var(--color-light-gray);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.user-tab:hover,
.user-tab.active {
    color: var(--color-gold);
    border-bottom-color: var(--color-gold);
}

.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.2);
    border: 1px solid #27ae60;
    color: #27ae60;
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.2);
    border: 1px solid #e74c3c;
    color: #e74c3c;
}

.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 35px;
    height: 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-btn span {
    display: block;
    width: 100%;
    height: 4px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-btn.active span:nth-child(1) {
    transform: translateY(12px) rotate(45deg);
}

.hamburger-btn.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
    transform: translateY(-12px) rotate(-45deg);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-menu {
    position: fixed;
    top: 0;
    left: -30%;
    width: 30%;
    height: 100%;
    background-color: var(--color-dark-gray);
    z-index: 999;
    padding: 80px 30px 30px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    transition: left 0.3s ease;
    overflow-y: auto;
}

.sidebar-menu.active {
    left: 0;
}

.sidebar-nav {
    list-style: none;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--color-gray);
    padding-bottom: 20px;
}

.sidebar-nav li {
    margin-bottom: 15px;
}

.sidebar-nav a {
    display: block;
    color: var(--color-white);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 12px 15px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--color-gold);
    background-color: var(--color-gray);
}

.sidebar-user {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sidebar-user span {
    color: var(--color-light-gray);
    margin-bottom: 5px;
}

@media (max-width: 992px) {
    .navbar-nav,
    .navbar-search,
    .navbar-user {
        display: none;
    }
    
    .hamburger-btn {
        display: flex;
    }
    
    .navbar-container {
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    .sidebar-menu {
        width: 70%;
        left: -70%;
    }
}