:root {
    --primary-color: #017439;
    --secondary-color: #FFFFFF;
    --text-color: #333333;
    --light-bg: #f9f9f9;
    --border-color: #e0e0e0;
}

.page-download {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color); /* Default text color for light background */
    background-color: var(--secondary-color); /* Default white background */
}

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

.page-download__section {
    padding: 60px 0;
    text-align: center;
}

.page-download__section-title {
    font-size: 2.5em;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: bold;
}

.page-download__section-description {
    font-size: 1.1em;
    color: #555555;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* HERO Section */
.page-download__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    padding-top: var(--header-offset, 120px); /* Fixed header spacing */
    background: linear-gradient(135deg, var(--primary-color) 0%, #a8e063 100%); /* Green gradient */
    color: var(--secondary-color);
}

.page-download__hero-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
}

.page-download__hero-image {
    width: 100%;
    max-width: 800px; /* Limit image width to prevent it from being too wide */
    margin-bottom: 30px;
}

.page-download__hero-image img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.page-download__hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    width: 100%;
}

.page-download__main-title {
    font-size: 3.5em;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--secondary-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-download__intro-text {
    font-size: 1.3em;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.page-download__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

.page-download__cta-button {
    display: inline-block;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-download__btn-primary {
    background: #C30808; /* Custom color for register/login/download as per instructions */
    color: #FFFF00; /* Custom font color for register/login as per instructions */
    border: 2px solid #C30808;
}

.page-download__btn-primary:hover {
    background: #e02f2f;
    border-color: #e02f2f;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-download__btn-secondary {
    background: var(--secondary-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-download__btn-secondary:hover {
    background: var(--light-bg);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Download Instructions Section */
.page-download__download-instructions {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.page-download__instruction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__instruction-item {
    background: var(--light-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.page-download__instruction-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-download__instruction-icon {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-bottom: 20px;
    border-radius: 8px; /* Added border-radius for consistency */
}

.page-download__instruction-title {
    font-size: 1.4em;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-download__instruction-text {
    font-size: 1em;
    color: #666666;
}

/* App Features Section */
.page-download__app-features {
    background-color: var(--primary-color); /* Dark section background */
    color: var(--secondary-color); /* Light text color */
}

.page-download__app-features .page-download__section-title {
    color: var(--secondary-color); /* Ensure title is white */
}

.page-download__app-features .page-download__section-description {
    color: rgba(255, 255, 255, 0.9);
}

.page-download__features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__feature-card {
    background: rgba(255, 255, 255, 0.1); /* Semi-transparent white background */
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: left;
    transition: transform 0.3s ease, background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.page-download__feature-card:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.2);
}

.page-download__feature-title {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-download__feature-text {
    font-size: 1em;
    color: rgba(255, 255, 255, 0.8);
}

/* QR Section */
.page-download__qr-section {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.page-download__qr-content {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    gap: 40px;
    text-align: left;
}

.page-download__qr-text-block {
    flex: 1;
    max-width: 600px;
}

.page-download__qr-text-block .page-download__section-title {
    text-align: left;
    font-size: 2.2em;
}

.page-download__qr-text-block .page-download__section-description {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.page-download__download-links {
    display: flex;
    gap: 20px;
    margin-top: 30px;
    justify-content: flex-start;
}

.page-download__compatibility-note {
    margin-top: 20px;
    font-size: 0.9em;
    color: #777777;
}

.page-download__qr-code-wrapper {
    flex-shrink: 0;
    background: var(--light-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-download__qr-code {
    width: 250px;
    height: 250px;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* FAQ Section */
.page-download__faq-area {
    background-color: var(--light-bg);
    color: var(--text-color);
}

.page-download__faq-list {
    max-width: 900px;
    margin: 40px auto 0 auto;
    text-align: left;
}

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 8px; /* Slightly larger border-radius */
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); /* subtle shadow */
}

/* FAQ默认状态 - 答案隐藏 */
.page-download__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 20px; /* Adjusted padding */
  opacity: 0;
}

/* FAQ展开状态 - 🚨 使用!important和足够大的max-height确保一定能展开 */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 Use !important to ensure priority, value large enough to contain any content */
  padding: 20px !important; /* Adjusted padding */
  opacity: 1;
  background: var(--secondary-color);
  border-radius: 0 0 8px 8px; /* Match item border-radius */
  border-top: 1px solid var(--border-color); /* Separator */
}

/* 问题样式 */
.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: var(--secondary-color);
  border: 1px solid var(--border-color);
  border-radius: 8px; /* Match item border-radius */
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-download__faq-question:hover {
  background: #f5f5f5;
  border-color: #d0d0d0;
}

.page-download__faq-question:active {
  background: #eeeeee;
}

/* 问题标题样式 */
.page-download__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 1.1em; /* Adjusted font size */
  font-weight: 600;
  line-height: 1.5;
  color: var(--primary-color); /* Use primary color for questions */
  pointer-events: none; /* Prevent h3 tag from blocking click events */
}

/* 切换图标 */
.page-download__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  line-height: 1;
  color: #666;
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* Prevent icon from blocking click events */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-download__faq-item.active .page-download__faq-toggle {
  color: var(--primary-color); /* Active toggle color */
  transform: rotate(45deg); /* Rotate for 'x' effect, or change to '-' in JS */
}

/* Responsive Design */
@media (max-width: 1024px) {
    .page-download__main-title {
        font-size: 2.8em;
    }
    .page-download__hero-image {
        max-width: 700px;
    }
    .page-download__section-title {
        font-size: 2em;
    }
    .page-download__qr-content {
        flex-direction: column;
        text-align: center;
    }
    .page-download__qr-text-block .page-download__section-title,
    .page-download__qr-text-block .page-download__section-description {
        text-align: center;
    }
    .page-download__download-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .page-download__hero-section {
        padding-top: var(--header-offset, 120px) !important; /* Mobile fixed header spacing */
        padding-bottom: 40px;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-download__hero-image img {
        border-radius: 8px;
    }
    .page-download__main-title {
        font-size: 2em;
    }
    .page-download__intro-text {
        font-size: 1em;
    }
    .page-download__cta-buttons {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        padding: 0 15px; /* Add padding to container */
        box-sizing: border-box;
    }
    .page-download__cta-button {
        padding: 12px 25px;
        font-size: 1em;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    .page-download__section {
        padding: 40px 0;
    }
    .page-download__section-title {
        font-size: 1.8em;
    }
    .page-download__section-description {
        font-size: 0.95em;
        margin-bottom: 30px;
    }
    .page-download__container {
        padding: 0 15px;
    }
    .page-download__instruction-grid,
    .page-download__features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-download__instruction-item,
    .page-download__feature-card {
        padding: 25px;
    }
    .page-download__instruction-icon {
        width: 80px;
        height: 80px;
    }
    .page-download__qr-code-wrapper {
        width: 100%;
        max-width: 300px; /* Limit QR code wrapper size */
        margin: 0 auto;
    }
    .page-download__qr-code {
        width: 100%;
        height: auto;
    }

    /* Mobile FAQ */
    .page-download__faq-question {
        padding: 15px;
        flex-wrap: wrap;
    }
    .page-download__faq-question h3 {
        font-size: 1em;
        margin-bottom: 0;
        width: calc(100% - 40px);
    }
    .page-download__faq-toggle {
        margin-left: 10px;
        width: 24px;
        height: 24px;
        font-size: 20px;
    }
    .page-download__faq-answer {
        padding: 0 15px;
    }
    .page-download__faq-item.active .page-download__faq-answer {
        padding: 15px !important;
    }

    /* All images responsive */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
    }
    .page-download__section,
    .page-download__card,
    .page-download__container,
    .page-download__hero-container,
    .page-download__instruction-item,
    .page-download__feature-card,
    .page-download__faq-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-download__qr-content {
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-download__download-links {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
}