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

body {
    font-family: 'Inter', sans-serif;
    background: #FFFFFF;
    color: #17191b;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    font-display: swap;
}

.site-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: #FFFFFF;
    border-right: 1px solid rgba(23, 25, 27, 0.08);
    padding: 2rem 1.5rem;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.logo-area {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(23, 25, 27, 0.08);
}

.logo-img {
    max-width: 100%;
    height: auto;
    width: 100%;
    max-height: 44px;
    object-fit: contain;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-link {
    color: #17191b;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.7rem 1rem;
    border-radius: 12px;
    transition: all 0.2s ease;
    letter-spacing: -0.2px;
}

.nav-link:hover {
    background: #313c48;
    color: #FFFFFF;
}

.nav-link.active {
    background: #17191b;
    color: #FFFFFF;
}

.trust-badge {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(23, 25, 27, 0.08);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #6c757d;
}

.badge-line {
    width: 30px;
    height: 2px;
    background: #17191b;
    margin-bottom: 0.75rem;
}

.main-content {
    padding: 2rem 3rem;
    max-width: 1400px;
}

.section {
    margin-bottom: 5rem;
    scroll-margin-top: 2rem;
}

.hero {
    text-align: left;
    margin-bottom: 4rem;
}

.hero-badge {
    display: inline-block;
    background: rgba(49, 60, 72, 0.08);
    color: #313c48;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border-radius: 40px;
    margin-bottom: 1.2rem;
    letter-spacing: 0.3px;
}

h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.2rem;
    letter-spacing: -1px;
    color: #17191b;
}

.accent-text {
    color: #313c48;
    display: inline-block;
}

.hero-sub {
    font-size: 1.2rem;
    color: #4a5568;
    max-width: 650px;
    margin-bottom: 2rem;
    font-weight: 400;
}

.stats-row {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.1);
    padding: 0.6rem 1.2rem;
    border-radius: 60px;
    font-size: 0.9rem;
    font-weight: 500;
}

.stat-num {
    font-weight: 700;
    color: #17191b;
    margin-right: 0.3rem;
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
    color: #17191b;
}

.section-header p {
    color: #5a6874;
    font-size: 1rem;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.2rem;
    margin: 1.5rem 0;
}

.link-card {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.1);
    border-radius: 20px;
    padding: 1.2rem 1.5rem;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
    cursor: pointer;
}

.link-card:hover {
    border-color: #313c48;
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.08);
}

.link-url {
    font-family: 'Inter', monospace;
    font-size: 0.85rem;
    font-weight: 500;
    word-break: break-all;
    color: #17191b;
    background: #f8f9fa;
    padding: 0.5rem 0.8rem;
    border-radius: 12px;
    display: inline-block;
    width: 100%;
}

.link-card:hover .link-url {
    background: #f1f3f5;
}

.link-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.8rem;
    font-size: 0.7rem;
    color: #6c757d;
}

.copy-btn {
    background: none;
    border: 1px solid rgba(23, 25, 27, 0.2);
    border-radius: 30px;
    padding: 0.3rem 0.9rem;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    color: #17191b;
}

.copy-btn:hover {
    background: #313c48;
    border-color: #313c48;
    color: white;
}

.update-note {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: #6c757d;
    padding: 0.8rem 0;
    border-top: 1px solid rgba(23, 25, 27, 0.08);
}

.verification-card {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.1);
    border-radius: 28px;
    padding: 2rem;
}

.input-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.input-group input {
    flex: 1;
    padding: 1rem 1.2rem;
    border: 1px solid rgba(23, 25, 27, 0.2);
    border-radius: 60px;
    font-size: 0.95rem;
    font-family: 'Inter', monospace;
    transition: all 0.2s;
    background: #FFFFFF;
}

.input-group input:focus {
    outline: none;
    border-color: #313c48;
    box-shadow: 0 0 0 3px rgba(49, 60, 72, 0.1);
}

.btn-primary {
    background: #17191b;
    color: white;
    border: none;
    padding: 0 2rem;
    border-radius: 60px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-primary:hover {
    background: #313c48;
    transform: scale(0.98);
}

.validation-result {
    margin-top: 1.2rem;
    padding: 1rem;
    border-radius: 16px;
    font-weight: 500;
    display: none;
}

.validation-result.success {
    display: block;
    background: rgba(49, 60, 72, 0.08);
    border-left: 3px solid #313c48;
    color: #17191b;
}

.validation-result.error {
    display: block;
    background: rgba(220, 53, 69, 0.05);
    border-left: 3px solid #dc3545;
    color: #b02a37;
}

.verify-tip {
    font-size: 0.75rem;
    color: #6c757d;
    margin-top: 1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
    margin-top: 1rem;
}

.feature-card {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.08);
    border-radius: 24px;
    padding: 1.8rem;
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: #313c48;
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
}

.feature-card p {
    color: #5a6874;
    font-size: 0.9rem;
    line-height: 1.5;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.step {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.08);
    border-radius: 20px;
    padding: 1.5rem;
}

.step-num {
    font-size: 2rem;
    font-weight: 800;
    color: rgba(49, 60, 72, 0.2);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.step p {
    color: #5a6874;
    font-size: 0.85rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.faq-item {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.08);
    border-radius: 20px;
    padding: 1.5rem;
}

.faq-item h3 {
    font-size: 1rem;
    margin-bottom: 0.6rem;
    font-weight: 700;
    color: #17191b;
}

.faq-item p {
    color: #5a6874;
    font-size: 0.85rem;
    line-height: 1.5;
}

.rules-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.rule-card {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.08);
    border-radius: 20px;
    padding: 1.5rem;
}

.rule-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}

.rule-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.rule-card p {
    color: #5a6874;
    font-size: 0.85rem;
}

.guide-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.8rem;
    margin: 2rem 0;
}

.guide-card {
    background: #FFFFFF;
    border: 1px solid rgba(23, 25, 27, 0.08);
    border-radius: 24px;
    padding: 1.8rem;
}

.guide-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.guide-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.guide-card p {
    color: #5a6874;
    font-size: 0.85rem;
    line-height: 1.5;
}

.market-stats {
    background: #f8f9fa;
    border-radius: 28px;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-block {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #6c757d;
    font-weight: 600;
}

.stat-value {
    font-weight: 600;
    color: #17191b;
    font-size: 0.95rem;
    word-break: break-word;
}

.stat-value.online {
    color: #2b8c4a;
    position: relative;
    padding-left: 1.2rem;
}

.stat-value.online::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: #2b8c4a;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(43, 140, 74, 0.2);
}

.seo-article {
    background: #FFFFFF;
    border-radius: 28px;
    padding: 2rem;
    border: 1px solid rgba(23, 25, 27, 0.05);
}

.article-content p {
    margin-bottom: 1.2rem;
    color: #2d3748;
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer {
    border-top: 1px solid rgba(23, 25, 27, 0.08);
    margin-top: 3rem;
    background: #FFFFFF;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.8rem;
    color: #6c757d;
}

.footer-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-links span {
    cursor: default;
    font-weight: 500;
}

.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #17191b;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 60px;
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 10000;
    transform: translateY(150%);
    transition: transform 0.25s ease;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.notification.show {
    transform: translateY(0);
}

@media (max-width: 900px) {
    .site-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: relative;
        height: auto;
        padding: 1.2rem;
        border-right: none;
        border-bottom: 1px solid rgba(23, 25, 27, 0.08);
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 1rem;
    }
    
    .logo-area {
        margin-bottom: 0;
        padding-bottom: 0;
        border-bottom: none;
        flex: 1;
    }
    
    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.3rem;
        flex: 2;
        justify-content: flex-end;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .trust-badge {
        display: none;
    }
    
    .main-content {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .hero-sub {
        font-size: 1rem;
    }
    
    .section {
        margin-bottom: 3rem;
    }
    
    .features-grid, .faq-grid, .rules-container, .steps-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .btn-primary {
        padding: 0.8rem 1.5rem;
        width: 100%;
    }
    
    .footer-inner {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }
    
    .stats-row {
        gap: 0.8rem;
    }
    
    .stat {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }
    
    .verification-card {
        padding: 1.2rem;
    }
    
    .market-stats {
        padding: 1.2rem;
        gap: 1rem;
    }
    
    .seo-article {
        padding: 1.2rem;
    }
}

@media (max-width: 480px) {
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .link-card {
        padding: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.6rem;
    }
    
    .feature-card, .faq-item, .rule-card, .step {
        padding: 1.2rem;
    }
    
    .update-note {
        flex-direction: column;
        gap: 0.5rem;
    }
}