/* style/game-bai-tien-len.css */

:root {
  --page-primary-color: #017439;
  --page-secondary-color: #FFFFFF;
  --page-text-color-dark: #333333;
  --page-text-color-light: #FFFFFF;
  --page-register-btn-bg: #C30808;
  --page-login-btn-bg: #C30808;
  --page-register-login-font: #FFFF00;
  --page-background-color: #FFFFFF;
}

.page-game-bai-tien-len {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--page-text-color-dark);
  background-color: var(--page-background-color);
}

.page-game-bai-tien-len__container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-game-bai-tien-len__top-section {
  background-color: var(--page-primary-color);
  color: var(--page-text-color-light);
  padding: 10px 0 60px 0;
  text-align: center;
}

.page-game-bai-tien-len__main-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--page-text-color-light);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-game-bai-tien-len__description {
  font-size: 1.1rem;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--page-text-color-light);
}

.page-game-bai-tien-len__cta-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-game-bai-tien-len__btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-game-bai-tien-len__btn--primary {
  background-color: var(--page-register-btn-bg);
  color: var(--page-register-login-font);
  border: 2px solid var(--page-register-btn-bg);
}

.page-game-bai-tien-len__btn--primary:hover {
  background-color: darken(var(--page-register-btn-bg), 10%);
  border-color: darken(var(--page-register-btn-bg), 10%);
}

.page-game-bai-tien-len__btn--secondary {
  background-color: transparent;
  color: var(--page-text-color-light);
  border: 2px solid var(--page-text-color-light);
}

.page-game-bai-tien-len__btn--secondary:hover {
  background-color: var(--page-text-color-light);
  color: var(--page-primary-color);
}

.page-game-bai-tien-len__btn--register {
  background-color: var(--page-register-btn-bg);
  color: var(--page-register-login-font);
  border: 2px solid var(--page-register-btn-bg);
}

.page-game-bai-tien-len__btn--register:hover {
  background-color: darken(var(--page-register-btn-bg), 10%);
  border-color: darken(var(--page-register-btn-bg), 10%);
}

.page-game-bai-tien-len__btn--play {
  background-color: var(--page-primary-color);
  color: var(--page-text-color-light);
  border: 2px solid var(--page-primary-color);
}

.page-game-bai-tien-len__btn--play:hover {
  background-color: darken(var(--page-primary-color), 10%);
  border-color: darken(var(--page-primary-color), 10%);
}

.page-game-bai-tien-len__btn--promo {
  background-color: var(--page-primary-color);
  color: var(--page-text-color-light);
  border: 1px solid var(--page-primary-color);
  padding: 10px 20px;
  font-size: 0.95rem;
}

.page-game-bai-tien-len__btn--promo:hover {
  background-color: darken(var(--page-primary-color), 10%);
  border-color: darken(var(--page-primary-color), 10%);
}

.page-game-bai-tien-len__btn--small {
  padding: 10px 20px;
  font-size: 0.95rem;
}

.page-game-bai-tien-len__btn--centered {
  display: block;
  margin: 30px auto 0 auto;
  width: fit-content;
}

.page-game-bai-tien-len__section {
  padding: 60px 0;
}

.page-game-bai-tien-len__section:nth-of-type(even) {
  background-color: #f9f9f9;
}

.page-game-bai-tien-len__section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--page-primary-color);
  text-align: center;
  margin-bottom: 40px;
}

.page-game-bai-tien-len__section-title--light {
  color: var(--page-text-color-light);
}

.page-game-bai-tien-len__sub-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--page-primary-color);
  margin-top: 30px;
  margin-bottom: 15px;
}

.page-game-bai-tien-len__paragraph {
  font-size: 1.05rem;
  margin-bottom: 20px;
  color: var(--page-text-color-dark);
}

.page-game-bai-tien-len__paragraph--light {
  color: var(--page-text-color-light);
}

.page-game-bai-tien-len__figure {
  margin: 30px auto;
  text-align: center;
  max-width: 680px;
}

.page-game-bai-tien-len__image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-game-bai-tien-len__figcaption {
  font-size: 0.9rem;
  color: #666;
  margin-top: 10px;
}

.page-game-bai-tien-len__list,
.page-game-bai-tien-len__step-list,
.page-game-bai-tien-len__advantage-list {
  list-style: disc;
  margin-left: 25px;
  margin-bottom: 20px;
  color: var(--page-text-color-dark);
}

.page-game-bai-tien-len__list-item,
.page-game-bai-tien-len__step-item,
.page-game-bai-tien-len__advantage-item {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.page-game-bai-tien-len__step-item {
  counter-increment: step-counter;
  position: relative;
  padding-left: 40px;
}

.page-game-bai-tien-len__step-item::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  background-color: var(--page-primary-color);
  color: var(--page-text-color-light);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.page-game-bai-tien-len__step-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--page-primary-color);
  margin-top: 0;
  margin-bottom: 10px;
}

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

.page-game-bai-tien-len__promo-card {
  background-color: var(--page-secondary-color);
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  padding: 30px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

.page-game-bai-tien-len__promo-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--page-primary-color);
  margin-top: 0;
  margin-bottom: 15px;
}

.page-game-bai-tien-len__promo-description {
  font-size: 1rem;
  color: var(--page-text-color-dark);
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-game-bai-tien-len__advantage-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--page-primary-color);
  margin-top: 0;
  margin-bottom: 10px;
}

.page-game-bai-tien-len__advantage-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  list-style: none;
  margin-left: 0;
  padding-left: 0;
}

.page-game-bai-tien-len__advantage-item {
  background-color: var(--page-secondary-color);
  border-radius: 10px;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.05);
  padding: 25px;
  text-align: left;
}

.page-game-bai-tien-len__faq-section {
  background-color: #f9f9f9;
}

.page-game-bai-tien-len__faq-list {
  margin-top: 40px;
}

.page-game-bai-tien-len__faq-item {
  background-color: var(--page-secondary-color);
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.page-game-bai-tien-len__faq-question {
  padding: 18px 25px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--page-primary-color);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #eee;
}

.page-game-bai-tien-len__faq-question.active {
  border-bottom: none;
}

.page-game-bai-tien-len__faq-toggle {
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.3s ease;
}

.page-game-bai-tien-len__faq-question.active .page-game-bai-tien-len__faq-toggle {
  transform: rotate(45deg);
}

.page-game-bai-tien-len__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
  padding: 0 25px;
}

.page-game-bai-tien-len__faq-answer.active {
  max-height: 2000px; /* Large enough to accommodate content */
  padding: 15px 25px 25px 25px;
}

.page-game-bai-tien-len__cta-bottom .page-game-bai-tien-len__container {
  background-color: var(--page-primary-color);
  color: var(--page-text-color-light);
  padding: 50px 20px;
  border-radius: 10px;
  text-align: center;
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
  .page-game-bai-tien-len {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-game-bai-tien-len__container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 顶区标题 + 双 CTA */
  .page-game-bai-tien-len__top-section {
    padding: 10px 0 40px 0 !important;
  }

  .page-game-bai-tien-len__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 15px;
  }

  .page-game-bai-tien-len__description {
    font-size: 1rem;
    margin-bottom: 25px;
  }

  .page-game-bai-tien-len__cta-buttons {
    flex-direction: column;
    gap: 10px;
  }

  .page-game-bai-tien-len__btn {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 12px 20px;
    font-size: 0.95rem;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-game-bai-tien-len__btn--centered {
    width: 100% !important;
  }

  /* 单栏长文容器 */
  .page-game-bai-tien-len__section {
    padding: 40px 0;
  }

  .page-game-bai-tien-len__section-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
  }

  .page-game-bai-tien-len__sub-title {
    font-size: 1.4rem;
    margin-top: 25px;
    margin-bottom: 10px;
  }

  .page-game-bai-tien-len__paragraph,
  .page-game-bai-tien-len__list-item,
  .page-game-bai-tien-len__step-item,
  .page-game-bai-tien-len__advantage-item,
  .page-game-bai-tien-len__promo-description {
    font-size: 1rem;
  }

  /* 通用图片与 figure */
  .page-game-bai-tien-len img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }

  .page-game-bai-tien-len__figure {
    margin: 20px auto;
  }

  /* 按钮与按钮容器 (已包含在 .page-game-bai-tien-len__btn 和 .page-game-bai-tien-len__cta-buttons) */
  .page-game-bai-tien-len__promo-grid,
  .page-game-bai-tien-len__advantage-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-game-bai-tien-len__promo-card,
  .page-game-bai-tien-len__advantage-item {
    padding: 20px;
  }

  .page-game-bai-tien-len__promo-title {
    font-size: 1.3rem;
  }

  /* 注册教程与 FAQ 区块 */
  .page-game-bai-tien-len__step-item {
    padding-left: 35px;
  }

  .page-game-bai-tien-len__step-item::before {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }

  .page-game-bai-tien-len__step-title {
    font-size: 1.2rem;
  }

  .page-game-bai-tien-len__faq-question {
    padding: 15px 20px;
    font-size: 1.05rem;
  }

  .page-game-bai-tien-len__faq-answer.active {
    padding: 10px 20px 20px 20px;
  }

  .page-game-bai-tien-len__cta-bottom .page-game-bai-tien-len__container {
    padding: 40px 15px;
  }
}