:root {
    --main-color: #11A84E; /* 主色调 */
    --secondary-color: #22C768; /* 辅助色 */
    --card-bg: #11271B; /* Card B G */
    --background: #08160F; /* 背景 */
    --text-main: #F2FFF6; /* Text Main */
    --text-secondary: #A7D9B8; /* Text Secondary */
    --border: #2E7A4E; /* 边框 */
    --glow: #57E38D; /* Glow */
    --gold: #F2C14E; /* Gold */
    --divider: #1E3A2A; /* Divider */
    --deep-green: #0A4B2C; /* Deep Green */

    --main-color-rgb: 17, 168, 78; /* RGB for main color for rgba usage */
}

.page-blog-mu99-login-guide {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-secondary); /* Default text color, will be overridden by section-specific colors */
    background-color: var(--background); /* Overall page background */
}

.page-blog-mu99-login-guide__hero-section {
    background-color: var(--background);
    position: relative;
    padding: 10px 0 60px 0; /* body handles padding-top from header, this is minimal top padding */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

.page-blog-mu99-login-guide__hero-image-wrapper {
    width: 100%;
    overflow: hidden;
    position: relative;
    height: auto; /* Ensures image aspect ratio is maintained */
    display: flex;
    justify-content: center;
    align-items: center;
}

.page-blog-mu99-login-guide__hero-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
    max-width: 100%; /* Ensure responsiveness */
}

.page-blog-mu99-login-guide__hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: 20px;
    margin-top: -150px; /* Adjust to slightly overlap the image for visual flow */
    background: var(--card-bg); /* Use card background for content block */
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    transform: translateY(-20%); /* Move up slightly */
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__main-title {
    font-size: clamp(2em, 4vw, 3.2em); /* Responsive font size for H1 */
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 15px;
    color: var(--gold);
    text-shadow: 0 0 8px rgba(0, 0, 0, 0.7);
}

.page-blog-mu99-login-guide__hero-description {
    font-size: clamp(1em, 1.5vw, 1.2em);
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-blog-mu99-login-guide__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.page-blog-mu99-login-guide__section-title {
    font-size: clamp(1.8em, 3vw, 2.5em);
    font-weight: 700;
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-main);
}

.page-blog-mu99-login-guide__text-block {
    margin-bottom: 20px;
    font-size: 1.1em;
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__text-block .highlight {
    color: var(--glow);
    font-weight: bold;
}

.page-blog-mu99-login-guide__text-block a {
    color: var(--glow);
    text-decoration: none;
    transition: color 0.3s ease;
}

.page-blog-mu99-login-guide__text-block a:hover {
    color: var(--main-color);
    text-decoration: underline;
}

.page-blog-mu99-login-guide__introduction-section,
.page-blog-mu99-login-guide__login-section,
.page-blog-mu99-login-guide__features-section,
.page-blog-mu99-login-guide__why-choose-section {
    padding: 60px 0;
    background-color: var(--background);
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__registration-section,
.page-blog-mu99-login-guide__troubleshooting-section,
.page-blog-mu99-login-guide__security-section,
.page-blog-mu99-login-guide__faq-section,
.page-blog-mu99-login-guide__call-to-action-section {
    padding: 60px 0;
    background-color: var(--deep-green);
    color: var(--text-secondary);
}

/* Specific text color for titles on dark backgrounds to make them brighter */
.page-blog-mu99-login-guide__registration-section .page-blog-mu99-login-guide__section-title,
.page-blog-mu99-login-guide__troubleshooting-section .page-blog-mu99-login-guide__section-title,
.page-blog-mu99-login-guide__security-section .page-blog-mu99-login-guide__section-title,
.page-blog-mu99-login-guide__faq-section .page-blog-mu99-login-guide__section-title,
.page-blog-mu99-login-guide__call-to-action-section .page-blog-mu99-login-guide__section-title {
    color: var(--gold);
}

/* Links within dark sections */
.page-blog-mu99-login-guide__registration-section a,
.page-blog-mu99-login-guide__troubleshooting-section a,
.page-blog-mu99-login-guide__security-section a,
.page-blog-mu99-login-guide__faq-section a,
.page-blog-mu99-login-guide__call-to-action-section a {
    color: var(--glow);
}
.page-blog-mu99-login-guide__registration-section a:hover,
.page-blog-mu99-login-guide__troubleshooting-section a:hover,
.page-blog-mu99-login-guide__security-section a:hover,
.page-blog-mu99-login-guide__faq-section a:hover,
.page-blog-mu99-login-guide__call-to-action-section a:hover {
    color: var(--main-color);
}

.page-blog-mu99-login-guide__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.page-blog-mu99-login-guide__btn-primary,
.page-blog-mu99-login-guide__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    max-width: 100%; /* Responsive button */
    box-sizing: border-box; /* Include padding in width */
    white-space: normal; /* Allow text to wrap */
    word-wrap: break-word; /* Break long words */
    text-align: center;
}

.page-blog-mu99-login-guide__btn-primary {
    background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(17, 168, 78, 0.4);
}

.page-blog-mu99-login-guide__btn-primary:hover {
    background: linear-gradient(180deg, #13994A 0%, #2AD16F 100%);
    box-shadow: 0 6px 15px rgba(17, 168, 78, 0.6);
}

.page-blog-mu99-login-guide__btn-secondary {
    background-color: transparent;
    color: var(--glow);
    border: 2px solid var(--glow);
    box-shadow: 0 4px 10px rgba(87, 227, 141, 0.2);
}

.page-blog-mu99-login-guide__btn-secondary:hover {
    background-color: var(--glow);
    color: var(--deep-green);
    box-shadow: 0 6px 15px rgba(87, 227, 141, 0.4);
}

.page-blog-mu99-login-guide__step-by-step {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-blog-mu99-login-guide__step-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-blog-mu99-login-guide__step-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.page-blog-mu99-login-guide__step-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
    object-fit: cover;
    display: block;
    margin-left: auto;
    margin-right: auto;
    min-width: 200px;
    min-height: 200px;
}

.page-blog-mu99-login-guide__step-title {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-main);
}

.page-blog-mu99-login-guide__step-description {
    font-size: 1em;
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__ordered-list,
.page-blog-mu99-login-guide__unordered-list {
    margin-left: 20px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__ordered-list li,
.page-blog-mu99-login-guide__unordered-list li {
    margin-bottom: 10px;
    font-size: 1.1em;
}

.page-blog-mu99-login-guide__ordered-list li strong,
.page-blog-mu99-login-guide__unordered-list li strong {
    color: var(--text-main);
}

.page-blog-mu99-login-guide__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-blog-mu99-login-guide__feature-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-blog-mu99-login-guide__feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.page-blog-mu99-login-guide__feature-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
    object-fit: cover;
    display: block;
    min-width: 200px;
    min-height: 200px;
}

.page-blog-mu99-login-guide__feature-title {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-main);
}

.page-blog-mu99-login-guide__feature-title a {
    color: var(--text-main);
    text-decoration: none;
}

.page-blog-mu99-login-guide__feature-title a:hover {
    color: var(--glow);
    text-decoration: underline;
}

.page-blog-mu99-login-guide__feature-description {
    font-size: 1em;
    color: var(--text-secondary);
}

.page-blog-mu99-login-guide__faq-list {
    margin-top: 40px;
}

.page-blog-mu99-login-guide__faq-item {
    background-color: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    overflow: hidden;
}

.page-blog-mu99-login-guide__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    cursor: pointer;
    font-size: 1.2em;
    font-weight: 600;
    color: var(--text-main);
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--divider);
    transition: background-color 0.3s ease;
    list-style: none; /* For details/summary */
}

.page-blog-mu99-login-guide__faq-question::-webkit-details-marker {
    display: none; /* Hide default marker for Chrome */
}

.page-blog-mu99-login-guide__faq-question:hover {
    background-color: rgba(var(--main-color-rgb), 0.1);
}

.page-blog-mu99-login-guide__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    margin-left: 15px;
    color: var(--glow);
    transition: transform 0.3s ease;
}

.page-blog-mu99-login-guide__faq-item[open] .page-blog-mu99-login-guide__faq-toggle {
    transform: rotate(45deg);
}

.page-blog-mu99-login-guide__faq-answer {
    padding: 15px 25px 20px 25px;
    font-size: 1em;
    color: var(--text-secondary);
    background-color: var(--background);
    border-top: none;
}

.page-blog-mu99-login-guide__faq-answer p {
    margin-bottom: 0;
}

.page-blog-mu99-login-guide__faq-answer a {
    color: var(--glow);
    text-decoration: none;
}

.page-blog-mu99-login-guide__faq-answer a:hover {
    text-decoration: underline;
}

/* Base styles for image, video and button responsiveness */
.page-blog-mu99-login-guide img {
    max-width: 100%;
    height: auto;
    display: block;
}

.page-blog-mu99-login-guide video {
    max-width: 100%;
    width: 100%;
    height: auto;
    display: block;
}

.page-blog-mu99-login-guide__cta-button,
.page-blog-mu99-login-guide__btn-primary,
.page-blog-mu99-login-guide__btn-secondary,
.page-blog-mu99-login-guide a[class*="button"],
.page-blog-mu99-login-guide a[class*="btn"] {
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-blog-mu99-login-guide__cta-buttons,
.page-blog-mu99-login-guide__button-group,
.page-blog-mu99-login-guide__btn-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

/* Mobile responsive styles */
@media (max-width: 768px) {
    .page-blog-mu99-login-guide {
        font-size: 16px;
        line-height: 1.6;
    }

    .page-blog-mu99-login-guide__hero-content {
        margin-top: -100px;
        transform: translateY(-10%);
        padding: 15px;
    }

    .page-blog-mu99-login-guide__main-title {
        font-size: 2em;
    }

    .page-blog-mu99-login-guide__hero-description {
        font-size: 1em;
    }

    .page-blog-mu99-login-guide__section-title {
        font-size: 1.8em;
    }

    .page-blog-mu99-login-guide__container {
        padding: 0 15px;
    }

    .page-blog-mu99-login-guide__hero-section,
    .page-blog-mu99-login-guide__introduction-section,
    .page-blog-mu99-login-guide__registration-section,
    .page-blog-mu99-login-guide__login-section,
    .page-blog-mu99-login-guide__troubleshooting-section,
    .page-blog-mu99-login-guide__features-section,
    .page-blog-mu99-login-guide__security-section,
    .page-blog-mu99-login-guide__why-choose-section,
    .page-blog-mu99-login-guide__faq-section,
    .page-blog-mu99-login-guide__call-to-action-section {
        padding: 40px 0;
    }

    /* Images responsiveness */
    .page-blog-mu99-login-guide img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Video responsiveness */
    .page-blog-mu99-login-guide video {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Button responsiveness */
    .page-blog-mu99-login-guide__cta-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .page-blog-mu99-login-guide__btn-primary,
    .page-blog-mu99-login-guide__btn-secondary,
    .page-blog-mu99-login-guide a[class*="button"],
    .page-blog-mu99-login-guide a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        padding: 12px 20px !important;
        font-size: 1em !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    .page-blog-mu99-login-guide__step-by-step,
    .page-blog-mu99-login-guide__feature-grid {
        grid-template-columns: 1fr;
    }

    .page-blog-mu99-login-guide__step-card,
    .page-blog-mu99-login-guide__feature-card {
        padding: 20px;
    }

    .page-blog-mu99-login-guide__faq-question {
        padding: 15px 20px;
        font-size: 1.1em;
    }

    .page-blog-mu99-login-guide__faq-answer {
        padding: 10px 20px 15px 20px;
    }
}