:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --text-dark: #333333;
  --text-light: #FFFFFF;
  --button-login: #EA7C07;
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark); /* Default text color for light background */
  background-color: var(--secondary-color); /* Matches body background assumption */
}

.page-khuyen-mai__container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
  box-sizing: border-box;
}

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  font-weight: 700;
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-khuyen-mai__section-description {
  font-size: 1.1em;
  color: var(--text-dark);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

/* HERO 双栏 */
.page-khuyen-mai__hero-section {
  background-color: var(--secondary-color); /* Light background for hero */
  padding-top: 10px; /* Small top padding as required, assuming shared.css handles body padding */
  padding-bottom: 60px;
}

.page-khuyen-mai__hero-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 40px;
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
}

.page-khuyen-mai__hero-content {
  flex: 1 1 50%;
  min-width: 300px;
  color: var(--text-dark);
}

.page-khuyen-mai__hero-title {
  font-size: clamp(2em, 4vw, 3.5em); /* H1 font size clamp */
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-khuyen-mai__hero-description {
  font-size: 1.15em;
  margin-bottom: 30px;
  color: var(--text-dark);
}

.page-khuyen-mai__hero-cta-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap; /* Ensure buttons wrap on smaller screens */
}

.page-khuyen-mai__hero-image {
  flex: 1 1 40%;
  min-width: 300px;
  text-align: center;
}

.page-khuyen-mai__hero-side-image {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* 按钮与按钮容器 */
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  text-align: center;
  max-width: 100%; /* Important for mobile */
  box-sizing: border-box; /* Important for mobile */
  white-space: normal; /* Allow text wrap */
  word-wrap: break-word; /* Allow text wrap */
}

.page-khuyen-mai__btn-primary {
  background-color: var(--primary-color);
  color: var(--text-light);
  border: 2px solid var(--primary-color);
}

.page-khuyen-mai__btn-primary:hover {
  background-color: #1e87b7; /* Darker shade of primary */
  border-color: #1e87b7;
  transform: translateY(-2px);
}

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

.page-khuyen-mai__btn-secondary:hover {
  background-color: var(--primary-color);
  color: var(--text-light);
  transform: translateY(-2px);
}

/* 促销排版 */
.page-khuyen-mai__promo-section {
  padding: 60px 0;
  background-color: var(--secondary-color);
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--secondary-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__promo-media {
  height: 200px;
  overflow: hidden;
}

.page-khuyen-mai__promo-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-khuyen-mai__promo-content {
  padding: 25px;
}

.page-khuyen-mai__promo-title {
  font-size: 1.5em;
  font-weight: 600;
  margin-bottom: 15px;
  line-height: 1.3;
}

.page-khuyen-mai__promo-title a {
  color: var(--primary-color);
  text-decoration: none;
}

.page-khuyen-mai__promo-title a:hover {
  text-decoration: underline;
}

.page-khuyen-mai__promo-text {
  font-size: 1em;
  color: var(--text-dark);
  margin-bottom: 20px;
}

/* 教程长文排版 */
.page-khuyen-mai__guide-section {
  padding: 60px 0;
  background-color: var(--primary-color); /* Dark background */
  color: var(--text-light); /* Light text for dark background */
}

.page-khuyen-mai__guide-section .page-khuyen-mai__section-title {
  color: var(--text-light);
}

.page-khuyen-mai__guide-section .page-khuyen-mai__section-description {
  color: var(--text-light);
}

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

.page-khuyen-mai__guide-step {
  text-align: center;
  padding: 25px;
  background-color: rgba(255, 255, 255, 0.1); /* Slightly transparent white for cards */
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}