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

/* Base styles for the page content wrapper */
.page-da-ga {
  font-family: 'Arial', sans-serif;
  color: var(--text-main); /* Ensure contrast with body background */
  background-color: var(--color-deep-navy); /* Base for main content area */
  line-height: 1.6;
}

/* Section styling */
.page-da-ga__section {
  padding: 60px 0;
  text-align: center;
}

.page-da-ga__dark-section {
  background-color: var(--color-deep-navy);
  color: var(--text-main);
}

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

/* Titles */
.page-da-ga__section-title {
  font-size: clamp(28px, 4vw, 42px);
  color: var(--text-main);
  margin-bottom: 30px;
  font-weight: 700;
  line-height: 1.2;
}

.page-da-ga__hero-title {
  font-size: clamp(32px, 5vw, 50px);
  color: var(--gold);
  margin-bottom: 20px;
  font-weight: 800;
  line-height: 1.1;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-da-ga__hero-description {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 30px;
}

.page-da-ga__highlight {
  color: var(--gold);
  font-weight: 600;
}

.page-da-ga__text-block {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 900px;
  margin: 0 auto 20px;
  text-align: left;
}

.page-da-ga__image-content {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 30px auto;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.page-da-ga__hero-buttons,
.page-da-ga__cta-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.page-da-ga__btn-primary,
.page-da-ga__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-da-ga__btn-primary {
  background: var(--button-gradient);
  color: #ffffff;
  border: 2px solid transparent;
}

.page-da-ga__btn-primary:hover {
  background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-da-ga__btn-secondary {
  background: var(--color-deep-navy);
  color: var(--gold);
  border: 2px solid var(--gold);
}

.page-da-ga__btn-secondary:hover {
  background: var(--gold);
  color: var(--color-deep-navy);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* Cards */
.page-da-ga__card {
  background-color: var(--card-bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 25px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-da-ga__card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

/* Hero Section specific */
.page-da-ga__hero-section {
  position: relative;
  padding-top: 10px;
  padding-bottom: 60px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 600px;
}

.page-da-ga__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.page-da-ga__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.5);
}

.page-da-ga__hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  padding: 0 20px;
  text-align: center;
}

/* Features Grid */
.page-da-ga__features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-da-ga__feature-title {
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 15px;
  font-weight: 700;
}

.page-da-ga__feature-description {
  font-size: 16px;
  color: var(--text-secondary);
}

/* List styles */
.page-da-ga__list {
  list-style: none;
  padding: 0;
  margin: 30px auto;
  max-width: 900px;
  text-align: left;
}

.page-da-ga__list-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 15px 20px;
  margin-bottom: 10px;
  font-size: 17px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
}

.page-da-ga__list-item strong {
  color: var(--text-main);
  margin-right: 8px;
}

.page-da-ga__list-item::before {
  content: '✓';
  color: var(--gold);
  font-weight: bold;
  margin-right: 10px;
  font-size: 1.2em;
}

/* Steps Grid (Guide section) */
.page-da-ga__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-da-ga__step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  padding: 30px;
}

.page-da-ga__step-number {
  font-size: 48px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 15px;
  background: linear-gradient(180deg, #F2C14E 0%, #D49D2F 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-da-ga__step-title {
  font-size: 22px;
  color: var(--text-main);
  margin-bottom: 10px;
  font-weight: 700;
}

.page-da-ga__step-description {
  font-size: 16px;
  color: var(--text-secondary);
}

/* Promotions Grid */
.page-da-ga__promos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-da-ga__promo-card {
  padding: 30px;
  text-align: left;
}

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

.page-da-ga__promo-description {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

/* Support Options */
.page-da-ga__support-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-da-ga__support-item {
  padding: 30px;
}

.page-da-ga__support-title {
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 15px;
  font-weight: 700;
}

.page-da-ga__support-description {
  font-size: 16px;
  color: var(--text-secondary);
}

/* FAQ Section */
details.page-da-ga__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--card-bg);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
details.page-da-ga__faq-item summary.page-da-ga__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;
  color: var(--text-main);
}
details.page-da-ga__faq-item summary.page-da-ga__faq-question::-webkit-details-marker {
  display: none;
}
details.page-da-ga__faq-item summary.page-da-ga__faq-question:hover {
  background: rgba(255, 255, 255, 0.05);
}
.page-da-ga__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--text-main);
}
.page-da-ga__faq-toggle {
  font-size: 28px;
  font-weight: bold;
  color: var(--gold);
  flex-shrink: 0;
  margin-left: 20px;
  width: 32px;
  text-align: center;
}
details.page-da-ga__faq-item .page-da-ga__faq-answer {
  padding: 0 25px 25px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 0 0 10px 10px;
  color: var(--text-secondary);
  text-align: left;
}
.page-da-ga__faq-answer p {
  margin: 0;
}

/* Global image rules for content area */
.page-da-ga img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* === Responsive Styles === */
@media (max-width: 1024px) {
  .page-da-ga__section {
    padding: 50px 0;
  }
  .page-da-ga__container {
    padding: 0 15px;
  }
  .page-da-ga__section-title {
    font-size: clamp(24px, 3.5vw, 38px);
  }
  .page-da-ga__hero-title {
    font-size: clamp(28px, 4.5vw, 45px);
  }
  .page-da-ga__hero-description {
    font-size: 17px;
  }
  .page-da-ga__features-grid,
  .page-da-ga__steps-grid,
  .page-da-ga__promos-grid,
  .page-da-ga__support-options {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
  }
  .page-da-ga__btn-primary,
  .page-da-ga__btn-secondary {
    padding: 12px 25px;
    font-size: 16px;
  }
  .page-da-ga__card {
    padding: 20px;
  }
  .page-da-ga__feature-title,
  .page-da-ga__step-title,
  .page-da-ga__promo-title,
  .page-da-ga__support-title {
    font-size: 20px;
  }
  .page-da-ga__step-number {
    font-size: 40px;
  }
  .page-da-ga__text-block,
  .page-da-ga__feature-description,
  .page-da-ga__list-item,
  .page-da-ga__step-description,
  .page-da-ga__promo-description,
  .page-da-ga__support-description {
    font-size: 15px;
  }
  details.page-da-ga__faq-item summary.page-da-ga__faq-question {
    padding: 15px 20px;
  }
  .page-da-ga__faq-qtext {
    font-size: 17px;
  }
  .page-da-ga__faq-toggle {
    font-size: 24px;
    margin-left: 15px;
    width: 28px;
  }
  details.page-da-ga__faq-item .page-da-ga__faq-answer {
    padding: 0 20px 20px;
  }
}

@media (max-width: 849px) {
  /* HERO 主图区域: object-fit:contain !important; aspect-ratio:unset; 禁止 cover 裁切两侧 */
  .page-da-ga__hero-image img {
    object-fit: contain !important;
    aspect-ratio: unset !important;
  }
}

@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-da-ga__hero-section {
    padding-top: 10px; /* Small top padding, body handles header offset */
    padding-bottom: 40px;
    min-height: auto;
  }
  .page-da-ga__hero-title {
    font-size: clamp(26px, 8vw, 36px);
  }
  .page-da-ga__hero-description {
    font-size: 15px;
    margin-bottom: 20px;
  }
  .page-da-ga__hero-buttons,
  .page-da-ga__cta-container {
    flex-direction: column;
    gap: 15px;
    margin-top: 25px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
  }

  /* 按钮与按钮容器 */
  .page-da-ga__btn-primary,
  .page-da-ga__btn-secondary,
  .page-da-ga a[class*="button"],
  .page-da-ga a[class*="btn"] {
    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;
  }

  /* 按钮容器移动端适配 */
  .page-da-ga__cta-buttons,
  .page-da-ga__button-group,
  .page-da-ga__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

  /* 通用图片与容器 */
  .page-da-ga img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-da-ga__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-da-ga__section {
    padding: 40px 0;
  }
  .page-da-ga__section-title {
    font-size: clamp(22px, 7vw, 30px);
    margin-bottom: 25px;
  }
  .page-da-ga__text-block {
    font-size: 15px;
  }
  .page-da-ga__features-grid,
  .page-da-ga__steps-grid,
  .page-da-ga__promos-grid,
  .page-da-ga__support-options {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-da-ga__card {
    padding: 20px;
  }
  .page-da-ga__list {
    margin: 20px auto;
  }
  .page-da-ga__list-item {
    font-size: 15px;
    padding: 12px 15px;
  }
  .page-da-ga__image-content {
    margin: 20px auto;
  }

  /* FAQ Section */
  details.page-da-ga__faq-item summary.page-da-ga__faq-question {
    padding: 15px;
  }
  .page-da-ga__faq-qtext {
    font-size: 15px;
  }
  .page-da-ga__faq-toggle {
    font-size: 20px;
    margin-left: 10px;
    width: 24px;
  }
  details.page-da-ga__faq-item .page-da-ga__faq-answer {
    padding: 0 15px 15px;
  }
}