/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0bbf5f;
    --secondary-color: #34a853;
    --dark-bg: #ffffff;
    --darker-bg: #ffffff;
    --text-light: #333333;
    --text-gray: #999;

    --accent-color: #0bbf5f;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 通知横幅 */
.notice-banner {
    background: linear-gradient(135deg, #0bbf5f 0%, #0a9f4f 100%);
    padding: 20px;
    position: relative;
    border-bottom: 3px solid var(--accent-color);
}

.notice-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.notice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.notice-header h3 {
    color: var(--text-light);
    font-size: 1.5em;
}

.close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-light);
    font-size: 2em;
    cursor: pointer;
    padding: 0 15px;
    border-radius: 50%;
    transition: all 0.3s ease;
    line-height: 1;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.notice-list {
    list-style: none;
    margin-bottom: 15px;
}

.notice-list li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    color: var(--text-light);
}

.notice-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 1.5em;
}

.support-contact {
    color: var(--text-light);
    margin-top: 15px;
}

.support-contact a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

.support-contact a:hover {
    text-decoration: underline;
}

.notice-banner.hidden {
    display: none;
}

/* 导航栏 */
.navbar {
    background: #ffffff;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5em;
    color: var(--accent-color);
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

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

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--card-bg);
    list-style: none;
    min-width: 180px;
    padding: 10px 0;
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    margin-top: 10px;
}

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

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
}

.dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-login,
.btn-signup {
    display: none;
    padding: 8px 20px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.btn-login {
    border: 1px solid var(--primary-color);
}

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

.btn-signup {
    background: var(--secondary-color);
}

.btn-signup:hover {
    background: #0a9f4f;
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    transition: all 0.3s ease;
}

/* 主横幅区域 */
.hero-section {
    background: linear-gradient(135deg, rgba(11, 191, 95, 0.1) 0%, rgba(10, 159, 79, 0.1) 100%);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: 0;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 39, 0.6);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-subtitle {
    font-size: 1.2em;
    color: var(--text-gray);
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3.5em;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stats {
    font-size: 1.5em;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 15px 40px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    background: #1557b0;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(26, 115, 232, 0.3);
}

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

.btn-secondary:hover {
    background: #2d8f47;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(52, 168, 83, 0.3);
}

/* 通用区块样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5em;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 愿景和使命 */
.vision-section {
    background: rgba(255, 255, 255, 0.9);
}

.vision-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1em;
    line-height: 1.8;
    color: var(--text-gray);
}

.vision-content p {
    margin-bottom: 20px;
}

/* 服务特点 */
.features-section {
    background: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.feature-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* 关于部分 */
.about-section {
    background: rgba(255, 255, 255, 0.9);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1em;
    line-height: 1.8;
    color: var(--text-gray);
}

/* 常见问题 */
.faq-section {
    background: var(--dark-bg);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.faq-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.faq-item h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.3em;
}

.faq-item p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* 为什么选择我们 */
.why-choose-section {
    background: rgba(255, 255, 255, 0.9);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--secondary-color);
}

.benefit-icon {
    font-size: 3.5em;
    margin-bottom: 20px;
}

.benefit-card h3 {
    font-size: 1.4em;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.benefit-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* 工作流程 */
.how-it-works-section {
    background: var(--dark-bg);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.step-item {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    position: relative;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.step-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: bold;
    color: var(--text-light);
    border: 4px solid var(--darker-bg);
}

.step-icon {
    font-size: 4em;
    margin: 20px 0 15px;
}

.step-item h3 {
    color: var(--accent-color);
    font-size: 1.3em;
}

.how-it-works-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.how-it-works-content p {
    color: var(--text-gray);
    font-size: 1.1em;
    line-height: 1.8;
    margin-bottom: 30px;
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 1.2em;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.contact-info {
    color: var(--text-gray);
    line-height: 1.8;
}

.contact-info p {
    margin-bottom: 15px;
}

.contact-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--dark-bg);
        width: 100%;
        padding: 20px;
        transition: left 0.3s ease;
        border-top: 1px solid var(--border-color);
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2em;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 2em;
    }

    .features-grid,
    .faq-grid,
    .benefits-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 60px 0;
        min-height: 500px;
    }

    .hero-video {
        width: 100%;
        height: 100%;
    }

    section {
        padding: 50px 0;
    }

    .feature-card,
    .benefit-card,
    .step-item {
        padding: 30px 20px;
    }
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.benefit-card,
.step-item,
.faq-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.1) 0%, rgba(52, 168, 83, 0.1) 100%);
    padding: 100px 0 60px;
    text-align: center;
}

.page-title {
    font-size: 3em;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1.3em;
    color: var(--text-gray);
}

/* Navigation Active State */
.nav-menu a.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
}

.nav-brand a {
    text-decoration: none;
    color: inherit;
}

/* Download Section */
.download-section {
    padding: 80px 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.download-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.download-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

.download-card h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.download-info {
    margin: 20px 0;
    text-align: left;
    color: var(--text-gray);
}

.download-info p {
    margin-bottom: 10px;
}

/* Packages Section */
.packages-section {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.9);
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.package-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
}

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

.package-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--accent-color);
    color: var(--dark-bg);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9em;
}

.package-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.package-header h3 {
    font-size: 2em;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.package-price {
    font-size: 2.5em;
    color: var(--text-light);
    font-weight: bold;
}

.package-price span {
    font-size: 0.4em;
    color: var(--text-gray);
}

.package-features ul {
    list-style: none;
    margin-bottom: 30px;
}

.package-features li {
    padding: 10px 0;
    color: var(--text-gray);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.package-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.package-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

/* Algorithms Section */
.algorithms-section {
    padding: 80px 0;
}

.algorithms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.algorithm-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.algorithm-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.algorithm-card h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.5em;
}

.algorithm-card p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Team Section */
.team-section {
    padding: 80px 0;
    background: var(--dark-bg);
}

.team-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-gray);
    line-height: 1.8;
}

.team-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 30px 0;
}

.team-list li {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Requirements Section */
.requirements-section {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.9);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.requirement-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.requirement-item h3 {
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 1.5em;
}

.requirement-item ul {
    list-style: none;
}

.requirement-item li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-gray);
}

.requirement-item li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* Installation Section */
.installation-section {
    padding: 80px 0;
}

.installation-steps {
    max-width: 800px;
    margin: 0 auto;
}

.install-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    align-items: flex-start;
}

.install-step .step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: bold;
    color: var(--text-light);
}

.step-content {
    flex: 1;
}

.step-content h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: 1.5em;
}

.step-content p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Contact Form Section */
.contact-form-section {
    padding: 80px 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-form-container,
.contact-info-container {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.contact-form-container h2,
.contact-info-container h2 {
    color: var(--accent-color);
    margin-bottom: 30px;
    font-size: 2em;
}

.form-group {
    margin-bottom: 25px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1em;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(11, 191, 95, 0.1);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 2.5em;
    flex-shrink: 0;
}

.contact-text h3 {
    color: var(--accent-color);
    margin-bottom: 8px;
    font-size: 1.3em;
}

.contact-text p {
    color: var(--text-gray);
    line-height: 1.8;
}

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

.contact-text a:hover {
    text-decoration: underline;
}

/* Offices Section */
.offices-section {
    padding: 80px 0;
    background: rgba(26, 31, 58, 0.5);
}

.offices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.office-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.office-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.office-card h3 {
    color: var(--accent-color);
    margin-bottom: 20px;
    font-size: 1.5em;
}

.office-info {
    color: var(--text-gray);
    line-height: 1.8;
}

/* Support Section */
.support-section {
    padding: 80px 0;
}

.support-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.support-content > p {
    color: var(--text-gray);
    font-size: 1.1em;
    line-height: 1.8;
    margin-bottom: 50px;
}

.support-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.support-feature {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.support-feature:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
}

.support-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.support-feature h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
    font-size: 1.3em;
}

.support-feature p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* FAQ Page Accordion */
.faq-page-section {
    background: var(--darker-bg);
}

.faq-accordion {
    max-width: 900px;
    margin: 0 auto;
}

.accordion {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.accordion-item + .accordion-item {
    border-top: 1px solid var(--border-color);
}

.accordion-header {
    margin: 0;
}

.accordion-button {
    width: 100%;
    text-align: left;
    padding: 18px 20px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-light);
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.3s ease, color 0.3s ease;
}

.accordion-button::after {
    content: '+';
    font-size: 1.2em;
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.accordion-button.active {
    background: rgba(11, 191, 95, 0.15);
    color: var(--accent-color);
}

.accordion-button.active::after {
    content: '−';
}

.accordion-collapse {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-collapse.show {
    max-height: 500px; /* enough for typical content */
}

.accordion-body {
    padding: 0 20px 18px 20px;
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 0.95em;
}

@media (max-width: 768px) {
    .faq-accordion {
        margin-top: 30px;
    }
}

/* Responsive Updates */
@media (max-width: 768px) {
    .page-title {
        font-size: 2em;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .requirements-grid {
        grid-template-columns: 1fr;
    }

    .install-step {
        flex-direction: column;
    }

    .packages-grid {
        grid-template-columns: 1fr;
    }

    .package-card.featured {
        transform: scale(1);
    }

    .package-card.featured:hover {
        transform: translateY(-10px);
    }
}