/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #1e40af;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #1e40af;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-subtitle a {
    color: #fbbf24;
    text-decoration: none;
    font-weight: 600;
}

.hero-subtitle a:hover {
    text-decoration: underline;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 150px;
}

.btn-primary {
    background: #fbbf24;
    color: #1f2937;
}

.btn-primary:hover {
    background: #f59e0b;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(251, 191, 36, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #1f2937;
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Sections */
.section {
    padding: 80px 0;
}

.bg-light {
    background-color: #f8fafc;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: #1f2937;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Modules Grid */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.module-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.module-card:hover {
    transform: translateY(-5px);
}

.module-image {
    height: 200px;
    background: linear-gradient(45deg, #1e40af, #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
}

.module-content {
    padding: 25px;
}

.module-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.module-content p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* Keywords Content */
.keywords-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.keyword-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #1e40af;
}

.keyword-item h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.keyword-item p {
    color: #6b7280;
    line-height: 1.7;
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    margin-top: 50px;
}

.faq-item {
    background: white;
    margin-bottom: 20px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 20px 25px;
    background: #f8fafc;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: #1f2937;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: #e2e8f0;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer.active {
    padding: 20px 25px;
    max-height: 500px;
}

.faq-answer p {
    color: #6b7280;
    line-height: 1.6;
}

/* About Content */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    margin-top: 50px;
}

.about-section {
    background: white;
    padding: 40px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.about-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1f2937;
}

.about-section p {
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 15px;
}

/* Contact */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.contact-item p {
    color: #6b7280;
    margin-bottom: 10px;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f8fafc;
    transition: all 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fbbf24;
}

.footer-section p {
    color: #d1d5db;
    line-height: 1.6;
    margin-bottom: 10px;
}

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

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

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #fbbf24;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

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

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

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

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

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

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 25px;
        min-width: 120px;
    }

    .section {
        padding: 60px 0;
    }

    .feature-card {
        padding: 30px 20px;
    }

    .module-content {
        padding: 20px;
    }

    .keyword-item {
        padding: 25px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-animate.animate {
    opacity: 1;
    transform: translateY(0);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Privacy Content */
.privacy-content {
    max-width: 900px;
    margin: 0 auto;
}

.privacy-section {
    background: white;
    padding: 40px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.privacy-section h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1f2937;
}

.privacy-section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 25px 0 15px;
    color: #1f2937;
}

.privacy-section p {
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 15px;
}

.privacy-section ul {
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 15px;
    padding-left: 20px;
}

.privacy-section ul li {
    margin-bottom: 8px;
}

/* Values Grid */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.value-item {
    background: #f8fafc;
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    border-left: 4px solid #1e40af;
}

.value-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.value-item p {
    color: #6b7280;
    line-height: 1.6;
}

/* Features List */
.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.feature-item {
    background: #f8fafc;
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid #3b82f6;
}

.feature-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.feature-item p {
    color: #6b7280;
    line-height: 1.6;
}

/* Responsive adjustments for new pages */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .privacy-section {
        padding: 25px;
    }
    
    .privacy-section h2 {
        font-size: 1.5rem;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .features-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .privacy-section {
        padding: 20px;
    }
    
    .privacy-section h2 {
        font-size: 1.3rem;
    }
    
    .value-item,
    .feature-item {
        padding: 20px;
    }
}

/* Contact Page Styles */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.contact-info h2,
.contact-form-section h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1f2937;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.contact-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-icon {
    color: #1e40af;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1f2937;
}

.contact-details p {
    color: #6b7280;
    margin-bottom: 5px;
    line-height: 1.5;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: #1f2937;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1e40af;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.faq-section {
    margin-top: 50px;
}

.faq-section h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1f2937;
    text-align: center;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.faq-grid .faq-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq-grid .faq-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1f2937;
}

.faq-grid .faq-item p {
    color: #6b7280;
    line-height: 1.6;
}

/* Responsive adjustments for contact page */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 25px;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .contact-item {
        padding: 20px;
        flex-direction: column;
        text-align: center;
    }
    
    .contact-form {
        padding: 20px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
    }
}

/* 联系卡片美化 */
.contact-content-centered {
    justify-content: center;
    display: flex;
}
.contact-info {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}
.contact-card-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-top: 32px;
}
.contact-card {
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.07);
    padding: 28px 32px;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 18px;
    font-size: 1.1rem;
    text-align: left;
}
.contact-label {
    font-weight: 600;
    min-width: 90px;
    color: #1f2937;
}
.contact-value a {
    color: #475569;
    text-decoration: none;
    transition: color 0.2s;
}
.contact-value a:hover {
    color: #1e40af;
    text-decoration: underline;
}
.contact-socials {
    display: flex;
    gap: 14px;
    align-items: center;
}
.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #f3f4f6;
    border-radius: 50%;
    width: 38px;
    height: 38px;
    transition: background 0.2s;
}
.social-icon:hover {
    background: #e0e7ef;
}
@media (max-width: 600px) {
    .contact-info {
        max-width: 100%;
    }
    .contact-card {
        padding: 18px 12px;
        font-size: 1rem;
    }
}

/* 首页 Hubungi Kami 模块优化 */
.home-contact-section {
    max-width: 540px;
    margin: 48px auto 64px auto;
    background: #f8fafc;
    border-radius: 18px;
    box-shadow: 0 6px 32px rgba(30,64,175,0.07);
    padding: 48px 32px 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.home-contact-section h2 {
    font-size: 2.4rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 36px;
    text-align: center;
}
.home-contact-card-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.home-contact-card {
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.07);
    padding: 22px 28px;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    font-size: 1.08rem;
    text-align: left;
}
.home-contact-label {
    font-weight: 600;
    min-width: 90px;
    color: #1f2937;
}
.home-contact-value a {
    color: #475569;
    text-decoration: none;
    transition: color 0.2s;
}
.home-contact-value a:hover {
    color: #1e40af;
    text-decoration: underline;
}
.home-contact-socials {
    display: flex;
    gap: 14px;
    align-items: center;
}
.home-social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #f3f4f6;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    transition: background 0.2s;
}
.home-social-icon:hover {
    background: #e0e7ef;
}
@media (max-width: 700px) {
    .home-contact-section {
        max-width: 98vw;
        padding: 32px 8px 28px 8px;
    }
    .home-contact-card {
        padding: 16px 10px;
        font-size: 1rem;
    }
    .home-contact-section h2 {
        font-size: 2rem;
    }
}