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

:root {
    --primary: #1a5276;
    --primary-light: #2e86c1;
    --primary-dark: #154360;
    --accent: #e74c3c;
    --accent-dark: #c0392b;
    --success: #27ae60;
    --warning: #f39c12;
    --error: #e74c3c;
    --bg: #f9fafb;
    --bg-white: #ffffff;
    --bg-light: #f0f4f8;
    --text: #2c3e50;
    --text-light: #5d6d7e;
    --text-muted: #95a5a6;
    --border: #e0e6ed;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
    --radius: 10px;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Header */
.site-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    max-width: 900px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 8px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-area img {
    height: 38px;
    width: auto;
}

.site-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.site-name span {
    color: var(--accent);
}

.main-nav {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
    text-decoration: none;
}

.main-nav a:hover {
    background: var(--bg-light);
    color: var(--primary);
    text-decoration: none;
}

.main-nav a.active {
    background: var(--primary);
    color: #fff;
}

/* Download button */
.btn-download {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(231,76,60,0.35);
    letter-spacing: 0.3px;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231,76,60,0.45);
    color: #fff;
    text-decoration: none;
}

.btn-download:active {
    transform: translateY(0);
}

.btn-download-lg {
    padding: 18px 48px;
    font-size: 22px;
}

.download-banner {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    margin: 20px 0;
    box-shadow: var(--shadow);
}

.download-banner h2 {
    font-size: 20px;
    margin-bottom: 6px;
    color: var(--primary);
}

.download-banner p {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 16px;
}

/* Page hero */
.page-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.page-hero h1 {
    font-size: 28px;
    line-height: 1.3;
    margin-bottom: 8px;
    font-weight: 700;
}

.page-hero p {
    font-size: 15px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

/* Content */
.content-area {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 28px 24px;
    margin: 24px 0;
    box-shadow: var(--shadow);
}

.content-area h1 {
    font-size: 26px;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.content-area h2 {
    font-size: 22px;
    color: var(--primary);
    margin: 28px 0 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--bg-light);
    line-height: 1.3;
}

.content-area h3 {
    font-size: 18px;
    color: var(--primary-dark);
    margin: 20px 0 8px;
    line-height: 1.3;
}

.content-area h4 {
    font-size: 16px;
    color: var(--text);
    margin: 16px 0 6px;
}

.content-area p {
    margin-bottom: 14px;
    color: var(--text);
}

.content-area ul,
.content-area ol {
    margin: 12px 0 16px 20px;
}

.content-area li {
    margin-bottom: 8px;
    color: var(--text);
}

.content-area strong {
    color: var(--text);
    font-weight: 600;
}

.content-area img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 16px 0;
    display: block;
}

/* Info table */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.info-table th {
    background: var(--primary);
    color: #fff;
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
}

.info-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-white);
}

.info-table tr:nth-child(even) td {
    background: var(--bg-light);
}

.info-table tr:last-child td {
    border-bottom: none;
}

/* FAQ */
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    background: var(--bg-white);
}

.faq-question {
    display: block;
    width: 100%;
    text-align: left;
    background: var(--bg-light);
    border: none;
    padding: 16px 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
}

.faq-question:hover {
    background: #e8edf3;
}

.faq-answer {
    display: none;
    padding: 16px 20px;
    color: var(--text);
    line-height: 1.6;
}

.faq-answer p {
    margin-bottom: 8px;
}

.faq-answer.open {
    display: block;
}

.faq-question.open {
    background: var(--primary);
    color: #fff;
}

/* Feature cards */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.feature-card {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
    transition: box-shadow 0.3s;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
}

.feature-card h3 {
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 17px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

/* Steps */
.step-list {
    counter-reset: step;
    list-style: none;
    margin: 20px 0;
    padding: 0;
}

.step-list li {
    counter-increment: step;
    position: relative;
    padding: 14px 16px 14px 56px;
    margin-bottom: 10px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--primary-light);
}

.step-list li::before {
    content: counter(step);
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

/* Callout */
.callout {
    background: #eaf4fb;
    border-left: 4px solid var(--primary-light);
    padding: 16px 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.callout p {
    margin: 0;
    color: var(--text);
}

.callout-warning {
    background: #fef5e7;
    border-left-color: var(--warning);
}

/* Conclusion */
.conclusion {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 24px;
    margin: 24px 0;
    border: 1px solid var(--border);
}

.conclusion h2 {
    margin-top: 0;
}

/* Footer */
.site-footer {
    background: var(--primary-dark);
    color: #c8d6e5;
    padding: 30px 0 20px;
    margin-top: 40px;
}

.footer-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    margin-bottom: 16px;
}

.footer-links a {
    color: #aeb6bf;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer-copy {
    text-align: center;
    font-size: 13px;
    color: #8395a7;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 16px;
}

.footer-disclaimer {
    text-align: center;
    font-size: 12px;
    color: #7f8c8d;
    margin-top: 8px;
}

/* Breadcrumb */
.breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    padding: 12px 0;
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb span {
    margin: 0 6px;
    color: var(--text-muted);
}

/* Contact form */
.contact-form {
    max-width: 600px;
    margin: 20px 0;
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text);
    font-size: 14px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    margin-bottom: 14px;
    background: var(--bg-white);
    transition: border-color 0.2s;
}

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

.contact-form button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
}

.contact-form button:hover {
    background: var(--primary-dark);
}

.contact-info {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 20px;
    margin: 20px 0;
}

.contact-info p {
    margin-bottom: 6px;
}

/* Hero image */
.hero-image {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius);
    margin: 16px auto;
    display: block;
    box-shadow: var(--shadow-lg);
}

/* Responsive */
@media (max-width: 600px) {
    .header-inner {
        justify-content: center;
        text-align: center;
    }

    .main-nav {
        justify-content: center;
        gap: 2px;
    }

    .main-nav a {
        padding: 6px 8px;
        font-size: 13px;
    }

    .page-hero h1 {
        font-size: 22px;
    }

    .content-area {
        padding: 20px 16px;
    }

    .content-area h1 {
        font-size: 22px;
    }

    .content-area h2 {
        font-size: 19px;
    }

    .content-area h3 {
        font-size: 17px;
    }

    .btn-download {
        padding: 12px 24px;
        font-size: 16px;
    }

    .btn-download-lg {
        padding: 14px 32px;
        font-size: 18px;
    }

    .info-table {
        font-size: 13px;
    }

    .info-table th,
    .info-table td {
        padding: 8px 10px;
    }

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

    .site-name {
        font-size: 20px;
    }

    .logo-area img {
        height: 32px;
    }
}

@media (max-width: 380px) {
    .main-nav a {
        padding: 5px 6px;
        font-size: 12px;
    }
}