:root {
  --Primary-Color: #113B7A;
  --Auxiliary-Color: #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;
  --Deep-Navy: #08162B; /* This is the body background */

  /* RGB values for transparent backgrounds */
  --Primary-Color-rgb: 17, 59, 122;
  --Deep-Navy-rgb: 8, 22, 43;
}

/* Base styles for the login page */
.page-login {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--Text-Main); /* Using custom color */
  background-color: var(--Deep-Navy); /* Body background from shared */
}

/* Hero Section */
.page-login__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
  text-align: center;
}

.page-login__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.page-login__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Cover for desktop */
  display: block;
}

.page-login__hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 20px;
  box-sizing: border-box;
}

.page-login__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  width: 100%; /* Ensure container takes full width on smaller screens */
  box-sizing: border-box;
}

.page-login__main-title {
  font-size: clamp(2.2em, 4vw, 3.5em); /* Use clamp for H1 */
  font-weight: 700;
  color: var(--Text-Main);
  margin-bottom: 15px;
  max-width: 900px;
  line-height: 1.2;
}

.page-login__tagline {
  font-size: 1.1em;
  color: var(--Text-Secondary);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.page-login__form-wrapper {
  background: var(--Card-BG);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  max-width: 450px;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
  border: 1px solid var(--Border);
}

.page-login__form-title {
  font-size: 2em;
  color: var(--Text-Main);
  margin-bottom: 25px;
  text-align: center;
}

.page-login__form-group {
  margin-bottom: 20px;
}

.page-login__form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--Text-Secondary);
  font-weight: 600;
}

.page-login__form-input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--Border);
  border-radius: 5px;
  background-color: var(--Deep-Navy);
  color: var(--Text-Main);
  font-size: 1em;
  box-sizing: border-box;
}

.page-login__form-input::placeholder {
  color: var(--Text-Secondary);
  opacity: 0.7;
}

.page-login__form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  font-size: 0.95em;
}

.page-login__remember-me {
  color: var(--Text-Secondary);
  display: flex;
  align-items: center;
}

.page-login__remember-me input {
  margin-right: 8px;
  accent-color: var(--Auxiliary-Color);
}

.page-login__forgot-password-link {
  color: var(--Auxiliary-Color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-login__forgot-password-link:hover {
  color: var(--Glow);
}

/* Buttons */
.page-login__btn-primary {
  display: block;
  width: 100%;
  padding: 14px 25px;
  border: none;
  border-radius: 5px;
  background: var(--Button-Gradient);
  color: #ffffff;
  font-size: 1.1em;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.3s ease, transform 0.2s ease;
  box-sizing: border-box;
  max-width: 100%; /* Ensure responsive button */
  white-space: normal; /* Allow text wrap */
  word-wrap: break-word; /* Allow text wrap */
}

.page-login__btn-primary:hover {
  background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
  transform: translateY(-2px);
}

.page-login__btn-secondary {
  display: inline-block; /* For contact support button */
  padding: 12px 20px;
  border-radius: 5px;
  background: transparent;
  border: 2px solid var(--Primary-Color);
  color: var(--Primary-Color);
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.3s ease, color 0.3s ease;
  box-sizing: border-box;
  max-width: 100%; /* Ensure responsive button */
  white-space: normal; /* Allow text wrap */
  word-wrap: break-word; /* Allow text wrap */
}

.page-login__btn-secondary:hover {
  background-color: var(--Primary-Color);
  color: #ffffff;
}

.page-login__login-button {
  margin-bottom: 20px;
}

.page-login__register-prompt {
  color: var(--Text-Secondary);
  text-align: center;
  margin-top: 20px;
  font-size: 0.95em;
}

.page-login__register-link {
  color: var(--Gold);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.page-login__register-link:hover {
  color: var(--Glow);
}

.page-login__social-login {
  text-align: center;
  margin-top: 25px;
  border-top: 1px solid var(--Divider);
  padding-top: 25px;
}

.page-login__social-login p {
  color: var(--Text-Secondary);
  margin-bottom: 15px;
}

.page-login__social-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.page-login__social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 600;
  transition: background-color 0.3s ease;
  min-width: 120px;
  box-sizing: border-box;
}

.page-login__social-btn--facebook {
  background-color: #3b5998;
}

.page-login__social-btn--facebook:hover {
  background-color: #2d4373;
}

.page-login__social-btn--google {
  background-color: #dd4b39;
}

.page-login__social-btn--google:hover {
  background-color: #c23321;
}

/* Advantages Section */
.page-login__advantages-section {
  padding: 80px 0;
  background-color: var(--Primary-Color);
  color: var(--Text-Main);
  text-align: center;
}

.page-login__section-title {
  font-size: clamp(1.8em, 3vw, 2.8em);
  color: var(--Text-Main);
  margin-bottom: 20px;
  font-weight: 700;
}

.page-login__section-description {
  font-size: 1.1em;
  color: var(--Text-Secondary);
  max-width: 800px;
  margin: 0 auto 50px;
}

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

.page-login__advantage-card {
  background: var(--Card-BG);
  padding: 30px;
  border-radius: 10px;
  border: 1px solid var(--Border);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-login__advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-login__advantage-card img {
  width: 250px;
  height: 250px;
  object-fit: contain;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  min-width: 200px; /* Enforce min image size */
  min-height: 200px; /* Enforce min image size */
}

.page-login__advantage-title {
  font-size: 1.5em;
  color: var(--Gold);
  margin-bottom: 15px;
}

.page-login__advantage-text {
  color: var(--Text-Secondary);
  font-size: 0.95em;
}

/* Troubleshooting Section */
.page-login__troubleshooting-section {
  padding: 80px 0;
  background-color: var(--Deep-Navy);
  color: var(--Text-Main);
  text-align: center;
}

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

.page-login__step-card {
  background: var(--Card-BG);
  padding: 30px;
  border-radius: 10px;
  border: 1px solid var(--Border);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  text-align: left;
}

.page-login__step-title {
  font-size: 1.4em;
  color: var(--Gold);
  margin-bottom: 15px;
}

.page-login__step-text {
  color: var(--Text-Secondary);
  font-size: 0.95em;
  margin-bottom: 20px;
}

.page-login__contact-support-btn {
  margin-top: 15px;
  display: inline-block;
}

/* CTA Section */
.page-login__cta-section {
  padding: 80px 0;
  background-color: var(--Primary-Color);
  text-align: center;
  color: var(--Text-Main);
}

.page-login__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
}

.page-login__large-button {
  padding: 16px 35px;
  font-size: 1.2em;
  min-width: 200px;
  max-width: 100%; /* Ensure responsive button */
  box-sizing: border-box;
}

/* FAQ Section */
.page-login__faq-section {
  padding: 80px 0;
  background-color: var(--Deep-Navy);
  color: var(--Text-Main);
}

.page-login__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

details.page-login__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid var(--Border);
  overflow: hidden;
  background: var(--Card-BG);
}
details.page-login__faq-item summary.page-login__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
details.page-login__faq-item summary.page-login__faq-question::-webkit-details-marker {
  display: none;
}
details.page-login__faq-item summary.page-login__faq-question:hover {
  background: rgba(var(--Primary-Color-rgb), 0.1);
}
.page-login__faq-qtext {
  flex: 1;
  font-size: 1.1em;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--Text-Main);
}
.page-login__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--Auxiliary-Color);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-login__faq-item .page-login__faq-answer {
  padding: 0 20px 20px;
  background: rgba(var(--Deep-Navy-rgb), 0.5);
  border-radius: 0 0 5px 5px;
  color: var(--Text-Secondary);
}
.page-login__faq-answer p {
  margin: 0;
  font-size: 0.95em;
}

/* --- Responsive Styles --- */
/* Media query for tablets and smaller desktops */
@media (max-width: 1024px) {
  .page-login__form-wrapper {
    padding: 30px;
  }

  .page-login__section-title {
    font-size: clamp(1.6em, 2.5vw, 2.2em);
  }

  .page-login__advantages-grid,
  .page-login__troubleshooting-steps {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .page-login__large-button {
    padding: 14px 25px;
    font-size: 1.1em;
  }
}

/* Media query for mobile devices */
@media (max-width: 768px) {
  /* HERO 主图区域 */
  .page-login__hero-section {
    min-height: auto;
    padding-top: 10px !important;
    padding-bottom: 40px;
  }

  .page-login__hero-image img {
    object-fit: contain !important;
    aspect-ratio: unset !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-login__hero-content {
    padding: 15px;
  }

  .page-login__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em);
    margin-bottom: 10px;
    padding: 0 10px;
    box-sizing: border-box;
  }

  .page-login__tagline {
    font-size: 1em;
    margin-bottom: 20px;
    padding: 0 10px;
    box-sizing: border-box;
  }

  .page-login__form-wrapper {
    padding: 20px;
    max-width: 100%;
    margin: 0 auto;
  }

  .page-login__form-title {
    font-size: 1.8em;
    margin-bottom: 20px;
  }

  .page-login__form-input {
    padding: 10px 12px;
  }

  .page-login__form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
  }

  .page-login__social-buttons {
    flex-direction: column;
    gap: 10px;
  }

  .page-login__social-btn {
    width: 100%;
    min-width: unset;
  }

  /* 通用图片与容器 */
  .page-login img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-login__section,
  .page-login__card,
  .page-login__container,
  .page-login__advantages-section,
  .page-login__troubleshooting-section,
  .page-login__cta-section,
  .page-login__faq-section {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
  }

  /* 按钮与按钮容器 */
  .page-login__cta-button,
  .page-login__btn-primary,
  .page-login__btn-secondary,
  .page-login a[class*="button"],
  .page-login 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 !important;
    padding-right: 15px !important;
  }

  .page-login__cta-buttons,
  .page-login__button-group,
  .page-login__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
    flex-wrap: wrap !important;
    gap: 10px;
    flex-direction: column; /* Stack buttons vertically on mobile */
  }

  /* 装饰主标题 + 长文 SEO 区 */
  .page-login__section-title {
    font-size: clamp(1.5em, 6vw, 2em);
    text-align: center;
    padding: 0 10px;
    box-sizing: border-box;
  }
  .page-login__section-description {
    font-size: 0.95em;
    padding: 0 10px;
    box-sizing: border-box;
  }
  .page-login__advantages-grid,
  .page-login__troubleshooting-steps {
    grid-template-columns: 1fr; /* Stack cards vertically */
  }
  .page-login__advantage-card,
  .page-login__step-card {
    padding: 20px;
  }
  .page-login__advantage-card img {
    min-width: 200px !important;
    min-height: 200px !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-login__faq-list {
    padding: 0 10px;
  }
  details.page-login__faq-item summary.page-login__faq-question { padding: 15px; }
  .page-login__faq-qtext { font-size: 1em; }
  .page-login__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
  }
  details.page-login__faq-item .page-login__faq-answer {
    padding: 0 15px 15px;
  }
}