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

:root {
    --primary-color: #2563eb;
    --secondary-color: #0ea5e9;
    --accent-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #64748b;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft JhengHei', 'PingFang TC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

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

/* Header & Navigation */
header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 15px 0;
}

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

.logo h1 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 0;
}

.logo .tagline {
    font-size: 12px;
    color: var(--gray-color);
    margin-top: -5px;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
    padding: 5px 0;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.hero h2 {
    font-size: 42px;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

/* Sections */
section {
    padding: 60px 0;
}

.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark-color);
    font-weight: 700;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.category-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.category-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--dark-color);
}

.category-card p {
    color: var(--gray-color);
    margin-bottom: 15px;
    line-height: 1.6;
}

.card-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.card-link:hover {
    color: var(--secondary-color);
}

/* Companies Section */
.companies-section {
    background: var(--white);
}

.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.company-card {
    background: var(--light-color);
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s;
    text-decoration: none;
    color: var(--dark-color);
    border: 2px solid #e2e8f0;
}

.company-card:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.company-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.company-card p {
    font-size: 14px;
    opacity: 0.8;
}

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

/* Quick Guide */
.quick-guide {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.step {
    text-align: center;
    padding: 20px;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark-color);
}

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

/* SEO Content Section */
.seo-content {
    background: var(--white);
}

.seo-content h2 {
    font-size: 32px;
    margin-bottom: 25px;
    color: var(--dark-color);
    text-align: left;
}

.seo-content h3 {
    font-size: 24px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.content-wrapper p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: var(--dark-color);
    font-size: 16px;
}

/* Breadcrumbs */
.breadcrumbs {
    padding: 15px 0;
    background: var(--light-color);
}

.breadcrumbs ul {
    list-style: none;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

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

/* Content Page Styles */
.content-page {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.content-page h1 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.content-page h2 {
    font-size: 28px;
    margin-top: 35px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.content-page h3 {
    font-size: 22px;
    margin-top: 25px;
    margin-bottom: 12px;
    color: var(--dark-color);
}

.content-page p {
    margin-bottom: 18px;
    line-height: 1.8;
}

.content-page ul,
.content-page ol {
    margin-left: 30px;
    margin-bottom: 20px;
}

.content-page li {
    margin-bottom: 10px;
    line-height: 1.6;
}

.highlight-box {
    background: #fef3c7;
    border-left: 4px solid var(--accent-color);
    padding: 20px;
    margin: 25px 0;
    border-radius: 4px;
}

.info-box {
    background: #dbeafe;
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    margin: 25px 0;
    border-radius: 4px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    box-shadow: var(--shadow);
}

.comparison-table th,
.comparison-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.comparison-table tr:hover {
    background: var(--light-color);
}

/* Footer */
footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--white);
}

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

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

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-section p {
    color: #cbd5e1;
    font-size: 14px;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid #475569;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #94a3b8;
}

/* Blog Styles */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.blog-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-card-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 15px;
}

.blog-category {
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.blog-card h2 {
    font-size: 20px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-card h2 a {
    color: var(--dark-color);
    text-decoration: none;
    transition: color 0.3s;
}

.blog-card h2 a:hover {
    color: var(--primary-color);
}

.blog-excerpt {
    color: var(--gray-color);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 15px;
    flex-grow: 1;
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.blog-tags .tag {
    background: var(--light-color);
    color: var(--gray-color);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 12px;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: gap 0.3s;
}

.read-more:hover {
    gap: 5px;
}

.section-intro {
    font-size: 18px;
    color: var(--gray-color);
    margin-top: 10px;
    margin-bottom: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        gap: 15px;
        font-size: 14px;
    }

    .categories-grid,
    .companies-grid {
        grid-template-columns: 1fr;
    }

    .content-page {
        padding: 25px 20px;
    }

    .content-page h1 {
        font-size: 28px;
    }

    .section-title {
        font-size: 26px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 0;
    }

    .hero h2 {
        font-size: 26px;
    }

    section {
        padding: 40px 0;
    }
}