:root {
    --primary-color: #113B7A;
    --secondary-color: #1D5FD1;
    --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
    --card-bg: #10233F;
    --text-main: #F3F8FF;
    --text-secondary: #AFC4E8;
    --border-color: #244D84;
    --deep-navy: #08162B;
    --glow-color: #4FA8FF;
    --gold-color: #F2C14E;
    --divider-color: #1B3357;
    --light-text-on-dark: #F3F8FF;
    --dark-text-on-light: #333333; /* For white/light backgrounds */
    --light-background: #ffffff;
}

.page-support {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--light-text-on-dark); /* Default for sections on deep-navy body */
    background-color: transparent; /* Body handles deep-navy */
}

.page-support__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
    box-sizing: border-box;
}

.page-support__section-title {
    font-size: 38px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
    color: var(--gold-color); /* Use gold for section titles for emphasis */
    line-height: 1.2;
}

.page-support__description-text {
    font-size: 18px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    color: var(--text-secondary);
}

/* Base button styles */
.page-support__btn-primary,
.page-support__btn-secondary,
.page-support__card-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    max-width: 100%; /* Important for mobile */
    box-sizing: border-box; /* Important for mobile */
    white-space: normal; /* Important for mobile */
    word-wrap: break-word; /* Important for mobile */
}

.page-support__btn-primary {
    background: var(--button-gradient);
    color: var(--light-text-on-dark);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-support__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    opacity: 0.9;
}

.page-support__btn-secondary {
    background: transparent;
    color: var(--text-main);
    border: 2px solid var(--secondary-color);
}

.page-support__btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--light-text-on-dark);
}

/* Card button specific */
.page-support__card-button {
    background: var(--secondary-color);
    color: var(--light-text-on-dark);
    border: none;
    margin-top: 15px;
    width: 100%; /* Cards will have 100% width buttons */
}

.page-support__card-button:hover {
    background: var(--primary-color);
    opacity: 0.9;
}

/* Image base styles */
.page-support img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover; /* Default for most images */
}

/* --- Hero Section --- */
.page-support__hero-section {
    position: relative;
    padding-top: 10px; /* Small top padding, body handles --header-offset */
    padding-bottom: 50px;
    background-color: var(--deep-navy); /* Ensure background for image */
}

.page-support__hero-image {
    position: relative;
    width: 100%;
    height: 600px; /* Fixed height for desktop hero */
    overflow: hidden;
}

.page-support__hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.page-support__hero-content {
    max-width: 900px;
    margin: 40px auto 0;
    text-align: center;
    padding: 0 15px;
}

.page-support__main-title {
    font-size: clamp(32px, 4vw, 56px); /* Responsive H1 */
    font-weight: 800;
    color: var(--gold-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.page-support__description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

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

/* --- Introduction Section --- */
.page-support__introduction-section {
    padding: 60px 0;
    background-color: var(--card-bg); /* Darker background */
}

.page-support__text-block {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto 20px;
    text-align: justify;
}
.page-support__text-block:last-child {
    margin-bottom: 0;
}

/* --- Channels Section --- */
.page-support__channels-section {
    padding: 60px 0;
    background-color: var(--deep-navy);
}

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

.page-support__channel-card {
    background-color: var(--card-bg); /* Default dark card background */
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    color: var(--light-text-on-dark);
}

/* Override for light background cards */
.page-support__light-bg {
    background-color: var(--light-background); /* White background */
    color: var(--dark-text-on-light); /* Dark text for contrast */
    border-color: #e0e0e0;
}

.page-support__light-bg .page-support__card-title {
    color: var(--primary-color); /* Primary color for title on light background */
}

.page-support__light-bg .page-support__card-text {
    color: #555; /* Slightly lighter dark text */
}

.page-support__channel-icon {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    object-fit: contain;
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(79, 168, 255, 0.5); /* Glow color */
}

.page-support__channel-card .page-support__card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--gold-color);
}

.page-support__channel-card .page-support__card-text {
    font-size: 16px;
    color: var(--text-secondary);
    flex-grow: 1;
}

/* --- FAQ Section --- */
.page-support__faq-section {
    padding: 60px 0;
    background-color: var(--primary-color); /* Dark section */
}

.page-support__faq-image {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.page-support__faq-list {
    max-width: 900px;
    margin: 0 auto 40px;
}

details.page-support__faq-item {
  margin-bottom: 15px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: var(--card-bg); /* Dark card bg for FAQ */
  color: var(--light-text-on-dark);
}
details.page-support__faq-item summary.page-support__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
details.page-support__faq-item summary.page-support__faq-question::-webkit-details-marker {
  display: none;
}
details.page-support__faq-item summary.page-support__faq-question:hover {
  background: rgba(var(--primary-color), 0.5); /* Lighter dark hover */
}
.page-support__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--gold-color); /* Gold for questions */
}
.page-support__faq-toggle {
  font-size: 28px; /* Larger toggle */
  font-weight: bold;
  color: var(--glow-color); /* Glow color for toggle */
  flex-shrink: 0;
  margin-left: 15px;
  width: 30px;
  text-align: center;
}
details.page-support__faq-item .page-support__faq-answer {
  padding: 0 25px 25px;
  background: var(--deep-navy); /* Deeper navy for answer background */
  border-radius: 0 0 12px 12px;
  color: var(--text-secondary);
  font-size: 16px;
}

.page-support__faq-answer p {
    margin: 0;
}

.page-support__cta-section {
    text-align: center;
    margin-top: 40px;
}

/* --- Issues Section --- */
.page-support__issues-section {
    padding: 60px 0;
    background-color: var(--deep-navy);
}

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

.page-support__issue-card {
    background-color: var(--light-background); /* White background for issues cards */
    color: var(--dark-text-on-light);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #e0e0e0;
}

.page-support__issue-card .page-support__card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color); /* Primary color for title on light background */
}

.page-support__issue-card .page-support__card-text {
    font-size: 16px;
    color: #555;
    flex-grow: 1;
}

/* --- Safety Section --- */
.page-support__safety-section {
    padding: 60px 0;
    background-color: var(--card-bg); /* Darker background */
}

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

.page-support__feature-card {
    background-color: var(--light-background); /* White background for feature cards */
    color: var(--dark-text-on-light);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    border: 1px solid #e0e0e0;
}

.page-support__feature-card .page-support__card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.page-support__feature-card .page-support__card-text {
    font-size: 16px;
    color: #555;
}

/* --- Contact CTA Section --- */
.page-support__contact-cta-section {
    padding: 60px 0;
    background-color: var(--deep-navy); /* Main background */
}

.page-support__contact-cta-section .page-support__container {
    background-color: var(--card-bg); /* Inner container with dark card bg */
    border-radius: 12px;
    padding: 50px 20px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.page-support__contact-cta-section .page-support__section-title {
    color: var(--gold-color);
}

.page-support__contact-cta-section .page-support__description-text {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.page-support__contact-image {
    width: 100%;
    max-width: 700px;
    margin: 0 auto 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 1024px) {
    .page-support__section-title {
        font-size: 34px;
    }
    .page-support__description-text {
        font-size: 17px;
    }
    .page-support__hero-image {
        height: 500px;
    }
    .page-support__main-title {
        font-size: clamp(30px, 4vw, 48px);
    }
    .page-support__description {
        font-size: 18px;
    }
    .page-support__cta-buttons {
        gap: 15px;
    }
    .page-support__btn-primary,
    .page-support__btn-secondary,
    .page-support__card-button {
        padding: 10px 20px;
        font-size: 15px;
    }
    .page-support__text-block {
        font-size: 16px;
    }
    .page-support__channel-card .page-support__card-title,
    .page-support__issue-card .page-support__card-title,
    .page-support__feature-card .page-support__card-title {
        font-size: 20px;
    }
    .page-support__channel-card .page-support__card-text,
    .page-support__issue-card .page-support__card-text,
    .page-support__feature-card .page-support__card-text {
        font-size: 15px;
    }
    details.page-support__faq-item summary.page-support__faq-question {
        padding: 15px 20px;
    }
    .page-support__faq-qtext {
        font-size: 17px;
    }
    .page-support__faq-toggle {
        font-size: 26px;
    }
    details.page-support__faq-item .page-support__faq-answer {
        padding: 0 20px 20px;
    }
}

@media (max-width: 768px) {
    /* General mobile adjustments */
    .page-support__container {
        padding: 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-support__section-title {
        font-size: 28px;
        margin-bottom: 20px;
    }

    .page-support__description-text {
        font-size: 16px;
        margin-bottom: 30px;
    }

    /* HERO 主图区域 */
    .page-support__hero-section {
        padding-top: 10px;
        padding-bottom: 30px;
    }
    .page-support__hero-image {
        height: 300px;
    }
    .page-support__hero-image img {
        object-fit: contain !important;
        aspect-ratio: unset !important;
    }
    .page-support__hero-content {
        margin-top: 20px;
        padding: 0 10px;
    }
    .page-support__main-title {
        font-size: clamp(28px, 8vw, 40px);
        margin-bottom: 15px;
    }
    .page-support__description {
        font-size: 16px;
        margin-bottom: 20px;
    }
    .page-support__cta-buttons {
        flex-direction: column;
        gap: 10px;
        margin-top: 20px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 15px;
    }
    /* 按钮与按钮容器 */
    .page-support__btn-primary,
    .page-support__btn-secondary,
    .page-support__card-button {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* Introduction Section */
    .page-support__introduction-section,
    .page-support__channels-section,
    .page-support__faq-section,
    .page-support__issues-section,
    .page-support__safety-section,
    .page-support__contact-cta-section {
        padding: 40px 0;
    }
    /* 装饰主标题 + 长文 SEO 区 */
    .page-support__text-block {
        font-size: 15px;
        margin-bottom: 15px;
        padding: 0 10px;
    }

    /* Channels Section */
    .page-support__channel-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    .page-support__channel-card {
        padding: 20px;
    }
    .page-support__channel-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 15px;
    }
    .page-support__channel-card .page-support__card-title {
        font-size: 18px;
    }
    .page-support__channel-card .page-support__card-text {
        font-size: 14px;
    }
    .page-support__card-button {
        padding: 10px 15px;
        font-size: 14px;
    }

    /* FAQ Section */
    .page-support__faq-image {
        margin-bottom: 30px;
        padding: 0 10px;
    }
    .page-support__faq-list {
        margin-bottom: 30px;
    }
    details.page-support__faq-item summary.page-support__faq-question {
        padding: 15px;
    }
    .page-support__faq-qtext {
        font-size: 15px;
    }
    .page-support__faq-toggle {
        font-size: 24px;
        width: 28px;
    }
    details.page-support__faq-item .page-support__faq-answer {
        padding: 0 15px 15px;
        font-size: 14px;
    }
    .page-support__cta-section {
        margin-top: 30px;
    }

    /* Issues Section */
    .page-support__issue-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    .page-support__issue-card {
        padding: 20px;
    }
    .page-support__issue-card .page-support__card-title {
        font-size: 18px;
    }
    .page-support__issue-card .page-support__card-text {
        font-size: 14px;
    }

    /* Safety Section */
    .page-support__safety-features {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    .page-support__feature-card {
        padding: 20px;
    }
    .page-support__feature-card .page-support__card-title {
        font-size: 18px;
    }
    .page-support__feature-card .page-support__card-text {
        font-size: 14px;
    }

    /* Contact CTA Section */
    .page-support__contact-cta-section .page-support__container {
        padding: 30px 15px;
    }
    .page-support__contact-cta-section .page-support__section-title {
        font-size: 26px;
    }
    .page-support__contact-cta-section .page-support__description-text {
        font-size: 15px;
        margin-bottom: 20px;
    }
    .page-support__contact-image {
        margin-bottom: 30px;
        padding: 0 10px;
    }

    /* 通用图片与容器 */
    .page-support img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-support__section,
    .page-support__card,
    .page-support__container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-support__contact-cta-section .page-support__container {
        padding-left: 15px !important;
        padding-right: 15px !important;
    }
}

/* Dark section style */
.page-support__dark-section {
    background-color: var(--card-bg); /* Use card-bg for consistency */
    color: var(--light-text-on-dark);
}
.page-support__dark-section .page-support__section-title {
    color: var(--gold-color);
}
.page-support__dark-section .page-support__description-text,
.page-support__dark-section .page-support__text-block {
    color: var(--text-secondary);
}