/* ============================================
   开元棋牌 - 响应式样式
   kp-responsive.css
   ============================================ */

/* --- xl: >= 1280px (Desktop) --- */
@media (max-width: 1279px) {
  .kp-container {
    max-width: 1024px;
  }
  .kp-footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
    gap: 25px;
  }
}

/* --- lg: 1024px - 1279px (Small Laptop) --- */
@media (max-width: 1023px) {
  .kp-container {
    max-width: 768px;
  }
  .kp-hero-content h1 {
    font-size: 2.2rem;
  }
  .kp-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .kp-gallery-grid {
    columns: 3;
  }
  .kp-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
  .kp-board-container {
    grid-template-columns: 1fr;
  }
  .kp-go-board {
    max-width: 100%;
  }
  .kp-nav-links a {
    font-size: 0.82rem;
    padding: 8px 8px;
  }
}

/* --- md: 768px - 1023px (Tablet) --- */
@media (max-width: 767px) {
  .kp-section {
    padding: 50px 0;
  }
  .kp-section-title h2 {
    font-size: 1.6rem;
  }
  .kp-hero-content h1 {
    font-size: 1.8rem;
    letter-spacing: 2px;
  }
  .kp-hero-subtitle {
    font-size: 1rem;
  }
  .kp-grid-2 {
    grid-template-columns: 1fr;
  }
  .kp-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .kp-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .kp-lecture-grid {
    grid-template-columns: 1fr;
  }
  .kp-community-grid {
    grid-template-columns: 1fr;
  }
  .kp-gallery-grid {
    columns: 2;
  }
  .kp-app-features {
    grid-template-columns: repeat(2, 1fr);
  }
  .kp-page-header {
    height: 250px;
  }
  .kp-page-header-content h1 {
    font-size: 1.6rem;
  }
  /* Hamburger Menu */
  .kp-nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, rgba(140,35,35,0.98), rgba(100,20,20,0.98));
    flex-direction: column;
    padding: 20px;
    gap: 5px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
  }
  .kp-nav-links.kp-nav-open {
    display: flex;
  }
  .kp-nav-links a {
    padding: 12px 15px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(230,168,79,0.15);
  }
  .kp-nav-links a::after {
    display: none;
  }
  .kp-hamburger {
    display: flex;
  }
  .kp-btn-app {
    margin-top: 10px;
    text-align: center;
  }
}

/* --- sm: 640px - 767px (Phone Landscape) --- */
@media (max-width: 639px) {
  html {
    font-size: 15px;
  }
  .kp-hero {
    min-height: 500px;
  }
  .kp-hero-content h1 {
    font-size: 1.5rem;
  }
  .kp-hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  .kp-btn-seal, .kp-btn-ghost {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
  .kp-grid-3 {
    grid-template-columns: 1fr;
  }
  .kp-grid-4 {
    grid-template-columns: 1fr;
  }
  .kp-gallery-grid {
    columns: 1;
  }
  .kp-app-features {
    grid-template-columns: 1fr;
  }
  .kp-app-buttons {
    flex-direction: column;
    align-items: center;
  }
  .kp-footer-grid {
    grid-template-columns: 1fr;
  }
  .kp-trust-logos {
    gap: 20px;
  }
  .kp-masters-scroll {
    gap: 15px;
  }
  .kp-master-card {
    min-width: 240px;
  }
}

/* --- xs: < 640px (Phone Portrait) --- */
@media (max-width: 479px) {
  .kp-section {
    padding: 35px 0;
  }
  .kp-section-title {
    margin-bottom: 30px;
  }
  .kp-section-title h2 {
    font-size: 1.4rem;
  }
  .kp-hero-content h1 {
    font-size: 1.3rem;
  }
  .kp-hero-badge {
    font-size: 0.75rem;
    padding: 4px 12px;
  }
  .kp-page-header {
    height: 200px;
  }
  .kp-page-header-content h1 {
    font-size: 1.3rem;
  }
  .kp-content-area h2 {
    font-size: 1.3rem;
  }
  .kp-board-controls {
    justify-content: center;
  }
}