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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg-dark: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-lighter: #252542;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-main: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
    50% { transform: translateY(-100px) translateX(50px); opacity: 0.6; }
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 汉堡菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-gradient {
    background: var(--gradient-main);
    color: white;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
}

.btn-light {
    background: white;
    color: var(--bg-dark);
}

.btn-light:hover {
    background: var(--text-secondary);
}

.btn-block {
    width: 100%;
}

.promo-banner {
    background: var(--gradient-main);
    padding: 0.8rem 0;
    text-align: center;
}

.promo-banner .container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

.promo-icon {
    font-size: 1.5rem;
}

.promo-text {
    font-size: 1rem;
}

.promo-text strong {
    font-size: 1.3rem;
    font-weight: 700;
}

.hero {
    padding: 6rem 0 8rem;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.btn-outline-light {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
}

.btn-outline-light:hover {
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

section {
    padding: 5rem 0;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.features {
    background: var(--bg-card);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-dark);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    border: 2px solid var(--border);
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    transform: translateY(-8px);
}

.pricing-card.featured {
    border-color: var(--primary);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-main);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.2rem;
}

.pricing-price .currency {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.pricing-price .amount {
    font-size: 3.5rem;
    font-weight: 800;
}

.pricing-duration {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.cases {
    background: var(--bg-card);
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.certificate-card {
    background: var(--bg-dark);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.certificate-image {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--bg-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.certificate-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.certificate-info {
    padding: 1.5rem;
}

.certificate-info h4 {
    margin-bottom: 0.5rem;
}

.certificate-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: slideUp 0.3s;
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    font-size: 2.5rem;
    color: white;
    cursor: pointer;
}

.modal-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
}

.modal-info {
    text-align: center;
    margin-top: 1rem;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    position: relative;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.process-step h3 {
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.step-line {
    flex: 0.5;
    height: 2px;
    background: var(--border);
    margin-top: 30px;
}

.contact {
    background: var(--bg-card);
}

.contact-content {
    text-align: center;
}

.contact-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
}

.contact-icon {
    font-size: 1.5rem;
}

.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    margin-bottom: 1rem;
}

.footer-col p,
.footer-col a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

.auth-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
}

.auth-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    border: 1px solid var(--border);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group.has-button {
    display: flex;
    gap: 1rem;
}

.form-group.has-button input {
    flex: 1;
}

.form-group.has-button button {
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

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

.login-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.login-tab {
    flex: 1;
    padding: 1rem;
    text-align: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.login-tab.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

.dashboard-container {
    display: flex;
    min-height: calc(100vh - 80px);
}

.sidebar {
    width: 250px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 2rem 0;
}

.sidebar-brand {
    padding: 0 1.5rem 2rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: var(--bg-lighter);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    border-left: 3px solid var(--primary);
}

/* 侧边栏汉堡菜单按钮 */
.sidebar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
}

.sidebar-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    transition: all 0.3s;
}

.sidebar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.sidebar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.sidebar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.dashboard-main {
    flex: 1;
    padding: 2rem;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.dashboard-header h1 {
    font-size: 1.75rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-balance {
    background: var(--bg-card);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.user-balance .amount {
    color: var(--success);
    font-weight: 700;
}

.dashboard-header .user-balance {
    color: var(--text-primary);
}

.dashboard-header .user-balance .amount {
    color: var(--success);
}

.balance-info .user-balance .amount {
    -webkit-text-fill-color: var(--success) !important;
    color: var(--success) !important;
    background: transparent !important;
}


.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.stat-card-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-header h3 {
    font-size: 1.25rem;
}

.order-list {
    list-style: none;
}

.order-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-dark);
    border-radius: 8px;
    margin-bottom: 1rem;
}

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

.order-info h4 {
    margin-bottom: 0.25rem;
}

.order-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.status-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.status-processing {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

.status-completed {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.status-cancelled {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.about-hero {
    padding: 6rem 0;
    text-align: center;
}

.about-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.about-hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.about-section {
    padding: 5rem 0;
}

.about-section h2 {
    font-size: 2.25rem;
    margin-bottom: 2rem;
    text-align: center;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.about-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.about-image {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--bg-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.about-card-content {
    padding: 1.5rem;
    text-align: center;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-content {
    width: 45%;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    background: var(--gradient-main);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.team-card {
    text-align: center;
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: var(--gradient-main);
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.team-card h4 {
    margin-bottom: 0.25rem;
}

.team-card p {
    color: var(--text-muted);
}

.order-form-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem 0;
}

.package-summary {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.package-summary h2 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.5rem;
}

.package-price {
    color: var(--success);
    font-size: 2rem;
}

.balance-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-lighter);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    color: var(--text-primary);
}

.balance-info .user-balance {
    background: transparent;
    padding: 0;
    border: none;
}

.balance-info .user-balance .amount {
    color: var(--success);
    font-size: 1.25rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.articles-container {
    padding: 3rem 0;
}

.articles-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.filter-tabs {
    display: flex;
    gap: 0.5rem;
}

.filter-tab {
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.article-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.article-card:hover {
    transform: translateY(-4px);
}

.article-cover {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--bg-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.article-content {
    padding: 1.5rem;
}

.article-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-lighter);
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.article-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.article-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.article-detail-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 0;
}

.article-detail-header {
    margin-bottom: 2rem;
}

.article-detail-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.article-detail-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-detail-content h2 {
    margin: 2rem 0 1rem;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
}

.pagination-btn:hover,
.pagination-btn.active {
    background: var(--primary);
    border-color: var(--primary);
}

@media (max-width: 1024px) {
    .feature-grid,
    .pricing-grid,
    .certificate-grid,
    .team-grid,
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: var(--bg-card);
        flex-direction: column;
        justify-content: center;
        gap: 1rem;
        padding: 2rem;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        width: 100%;
        padding: 1rem 1.5rem;
        font-size: 1.1rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-cta {
        flex-direction: column;
    }
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    .feature-grid,
    .pricing-grid,
    .certificate-grid,
    .about-grid,
    .team-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }
    .pricing-card.featured {
        transform: none;
    }
    .process-steps {
        flex-direction: column;
    }
    .step-line {
        display: none;
    }
    .contact-info {
        flex-direction: column;
        gap: 1.5rem;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .dashboard-container {
        flex-direction: column;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .timeline::before {
        left: 20px;
    }
    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px !important;
    }
    .timeline-year {
        left: 20px;
        transform: none;
    }

    /* 侧边栏移动端样式 */
    .sidebar-toggle {
        display: flex;
    }

    .sidebar {
        position: fixed;
        left: -250px;
        top: 0;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
        padding-top: 4rem;
    }

    .sidebar.active {
        left: 0;
    }

    .dashboard-container.sidebar-overlay::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    /* 余额明细列表 */
    .balance-history-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--border);
    }

    .balance-history-item:last-child {
        border-bottom: none;
    }

    .history-info {
        display: flex;
        gap: 1rem;
        align-items: center;
    }

    .history-icon {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem;
    }

    .history-icon.recharge {
        background: rgba(16, 185, 129, 0.2);
    }

    .history-icon.order-payment {
        background: rgba(239, 68, 68, 0.2);
    }

    .history-icon.refund {
        background: rgba(59, 130, 246, 0.2);
    }

    .history-details h4 {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }

    .history-details p {
        font-size: 0.875rem;
        color: var(--text-secondary);
    }

    .history-amount {
        text-align: right;
    }

    .history-amount .amount {
        font-size: 1.25rem;
        font-weight: 600;
    }

    .history-amount .amount.positive {
        color: var(--success);
    }

    .history-amount .amount.negative {
        color: var(--danger);
    }

    .history-amount .balance {
        font-size: 0.875rem;
        color: var(--text-secondary);
    }

    .empty-state {
        text-align: center;
        padding: 3rem 1rem;
        color: var(--text-secondary);
    }

    .empty-state svg {
        margin-bottom: 1rem;
        opacity: 0.5;
    }
}

/* 浮动客服按钮 */
.contact-float {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.contact-float.collapsed .contact-float-item.service-item {
    display: none;
}

.contact-float-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-float-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--gradient-main);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    transition: all 0.3s;
    position: relative;
    flex-shrink: 0;
}

.contact-float-btn.toggle-btn {
    background: var(--bg-card);
    border: 2px solid var(--border);
    padding: 0;
}

.contact-float-btn.toggle-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--text-muted);
    transition: transform 0.3s;
}

.contact-float-btn.toggle-btn:hover svg {
    fill: var(--primary);
}

.contact-float.collapsed .contact-float-btn.toggle-btn svg {
    transform: rotate(180deg);
}

.contact-float.collapsed .contact-float-btn.toggle-btn .arrow-icon {
    transform: rotate(180deg);
}

.contact-float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.contact-float-btn.toggle-btn:hover {
    border-color: var(--primary);
}

.contact-float-btn .tooltip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.contact-float-btn:hover .tooltip {
    opacity: 1;
    visibility: visible;
}

/* 客服二维码弹窗 */
.contact-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s;
}

.contact-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    max-width: 360px;
    width: 90%;
    text-align: center;
    border: 1px solid var(--border);
    animation: slideUp 0.3s;
}

.contact-modal-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 1.8rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s;
    line-height: 1;
}

.contact-modal-close:hover {
    color: var(--text-primary);
}

.contact-modal-title {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-modal-qrcode {
    width: 220px;
    height: 220px;
    margin: 0 auto 1rem;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.contact-modal-qrcode img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.contact-modal-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .contact-float {
        right: 10px;
    }
    .contact-float-btn {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
    }
    .contact-float-btn .tooltip {
        display: none;
    }
}