/* ============================================================
   一起草 (YiQiCao) - 草地运动与户外野餐生活方式平台
   主样式文件 | yc- 前缀命名规范
   Mobile-First Responsive Design
   ============================================================ */

/* ---------- CSS Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --yc-green: #6B8E23;
  --yc-green-light: #8FBC3A;
  --yc-green-dark: #4A6B10;
  --yc-purple: #9370DB;
  --yc-purple-light: #B39DDB;
  --yc-yellow: #FFD700;
  --yc-yellow-soft: #FFF3B0;
  --yc-white: #FFFDF7;
  --yc-warm-white: #FFF8F0;
  --yc-text: #3A3A2E;
  --yc-text-light: #6B6B5E;
  --yc-border: #E8E4D8;
  --yc-shadow: rgba(107, 142, 35, 0.12);
  --yc-shadow-lg: rgba(107, 142, 35, 0.2);
  --yc-radius: 12px;
  --yc-radius-lg: 20px;
  --yc-transition: 0.3s ease;
  --yc-font-heading: 'Nunito', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --yc-font-body: 'Open Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--yc-font-body);
  color: var(--yc-text);
  background-color: var(--yc-white);
  line-height: 1.8;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--yc-green);
  text-decoration: none;
  transition: color var(--yc-transition);
}

a:hover {
  color: var(--yc-green-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--yc-font-heading);
  color: var(--yc-text);
  line-height: 1.4;
  margin-bottom: 0.6em;
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
  margin-bottom: 1em;
}

/* ---------- Utility Classes ---------- */
.yc-container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px;
}

.yc-section {
  padding: 40px 0;
}

.yc-section-title {
  text-align: center;
  margin-bottom: 32px;
  position: relative;
}

.yc-section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--yc-green), var(--yc-yellow));
  margin: 12px auto 0;
  border-radius: 2px;
}

.yc-btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--yc-transition);
  border: none;
  text-align: center;
}

.yc-btn-primary {
  background: linear-gradient(135deg, var(--yc-green), var(--yc-green-light));
  color: #fff;
  box-shadow: 0 4px 15px var(--yc-shadow);
}

.yc-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--yc-shadow-lg);
  color: #fff;
}

.yc-btn-outline {
  background: transparent;
  color: var(--yc-green);
  border: 2px solid var(--yc-green);
}

.yc-btn-outline:hover {
  background: var(--yc-green);
  color: #fff;
}

.yc-card {
  background: #fff;
  border-radius: var(--yc-radius);
  box-shadow: 0 4px 20px var(--yc-shadow);
  overflow: hidden;
  transition: transform var(--yc-transition), box-shadow var(--yc-transition);
}

.yc-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--yc-shadow-lg);
}

.yc-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--yc-yellow-soft);
  color: var(--yc-green-dark);
  margin: 2px 4px 2px 0;
}

/* ---------- Navigation ---------- */
#yc-header {
  position: relative;
  width: 100%;
  z-index: 100;
  background: rgba(255, 253, 247, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(107, 142, 35, 0.15);
}

.yc-nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  max-width: 1440px;
  margin: 0 auto;
}

.yc-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--yc-font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--yc-green);
}

.yc-logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.yc-nav-links {
  display: none;
  list-style: none;
  gap: 4px;
}

.yc-nav-links li a {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--yc-text);
  transition: all var(--yc-transition);
  white-space: nowrap;
}

.yc-nav-links li a:hover,
.yc-nav-links li a.yc-active {
  color: var(--yc-green);
  background: rgba(107, 142, 35, 0.08);
  transform: scale(1.03);
}

.yc-nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

#yc-search-box {
  display: none;
  padding: 8px 14px;
  border: 2px solid var(--yc-border);
  border-radius: 50px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.8);
  outline: none;
  width: 160px;
  transition: border-color var(--yc-transition);
}

#yc-search-box:focus {
  border-color: var(--yc-green);
}

.yc-share-btn {
  display: none;
  padding: 8px 16px;
  background: var(--yc-purple);
  color: #fff;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.yc-share-btn:hover {
  background: var(--yc-purple-light);
  color: #fff;
}

/* Hamburger Menu */
#yc-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

#yc-hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--yc-text);
  border-radius: 2px;
  transition: all var(--yc-transition);
}

#yc-hamburger.yc-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

#yc-hamburger.yc-open span:nth-child(2) {
  opacity: 0;
}

#yc-hamburger.yc-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
#yc-mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 253, 247, 0.98);
  backdrop-filter: blur(12px);
  padding: 16px;
  border-bottom: 1px solid var(--yc-border);
  box-shadow: 0 8px 30px var(--yc-shadow);
}

#yc-mobile-menu.yc-show {
  display: block;
}

#yc-mobile-menu ul {
  list-style: none;
}

#yc-mobile-menu ul li a {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--yc-text);
  border-radius: 8px;
  transition: all var(--yc-transition);
}

#yc-mobile-menu ul li a:hover {
  background: rgba(107, 142, 35, 0.1);
  color: var(--yc-green);
}

#yc-mobile-search {
  width: 100%;
  padding: 10px 16px;
  border: 2px solid var(--yc-border);
  border-radius: 50px;
  font-size: 0.9rem;
  margin-top: 12px;
  outline: none;
}

/* ---------- Hero Banner ---------- */
#yc-hero {
  position: relative;
  width: 100%;
  height: 80vh;
  min-height: 400px;
  overflow: hidden;
}

.yc-hero-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.yc-hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
}

.yc-hero-slide.yc-active {
  opacity: 1;
}

.yc-hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yc-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.4) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.yc-hero-content h1 {
  color: #fff;
  font-size: 2rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  margin-bottom: 12px;
}

.yc-hero-content p {
  color: rgba(255,255,255,0.9);
  font-size: 1rem;
  text-shadow: 0 1px 10px rgba(0,0,0,0.3);
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.yc-hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}

.yc-hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all var(--yc-transition);
}

.yc-hero-dot.yc-active {
  background: #fff;
  transform: scale(1.3);
}

/* ---------- Video Section ---------- */
#yc-video-section {
  background: var(--yc-warm-white);
}

.yc-video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.yc-video-card {
  position: relative;
  border-radius: var(--yc-radius);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 16 / 9;
}

.yc-video-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--yc-transition);
}

.yc-video-card:hover img {
  transform: scale(1.05);
}

.yc-video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: all var(--yc-transition);
}

.yc-video-play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--yc-green);
  margin-left: 4px;
}

.yc-video-card:hover .yc-video-play-btn {
  transform: translate(-50%, -50%) scale(1.1);
  background: #fff;
}

.yc-video-title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
}

/* Video Modal */
#yc-video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#yc-video-modal.yc-show {
  display: flex;
}

.yc-modal-content {
  position: relative;
  width: 100%;
  max-width: 900px;
  border-radius: var(--yc-radius);
  overflow: hidden;
  background: #000;
}

.yc-modal-content video {
  width: 100%;
  display: block;
}

#yc-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  padding: 4px 12px;
}

/* ---------- Picnic Theme Section ---------- */
#yc-picnic-theme {
  background: #fff;
}

.yc-picnic-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.yc-picnic-image {
  border-radius: var(--yc-radius-lg);
  overflow: hidden;
}

.yc-picnic-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.yc-picnic-info h3 {
  color: var(--yc-green);
  margin-bottom: 12px;
}

.yc-picnic-list {
  list-style: none;
  margin: 16px 0;
}

.yc-picnic-list li {
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
  color: var(--yc-text-light);
}

.yc-picnic-list li::before {
  content: '\2726';
  position: absolute;
  left: 0;
  color: var(--yc-yellow);
}

/* ---------- Equipment Section ---------- */
#yc-equipment {
  background: var(--yc-warm-white);
}

.yc-equip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.yc-equip-card {
  background: #fff;
  border-radius: var(--yc-radius);
  overflow: hidden;
  box-shadow: 0 2px 15px var(--yc-shadow);
  transition: transform var(--yc-transition);
}

.yc-equip-card:hover {
  transform: translateY(-4px);
}

.yc-equip-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.yc-equip-card-body {
  padding: 12px;
}

.yc-equip-card-body h3 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.yc-equip-card-body p {
  font-size: 0.8rem;
  color: var(--yc-text-light);
  margin-bottom: 0;
}

/* ---------- Destination Ranking ---------- */
#yc-destinations {
  background: #fff;
}

.yc-dest-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.yc-dest-item {
  display: flex;
  gap: 16px;
  background: #fff;
  border-radius: var(--yc-radius);
  box-shadow: 0 2px 15px var(--yc-shadow);
  overflow: hidden;
  transition: transform var(--yc-transition);
}

.yc-dest-item:hover {
  transform: translateX(4px);
}

.yc-dest-rank {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  background: var(--yc-green);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
}

.yc-dest-rank.yc-gold { background: linear-gradient(135deg, #FFD700, #FFA500); }
.yc-dest-rank.yc-silver { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); }
.yc-dest-rank.yc-bronze { background: linear-gradient(135deg, #CD7F32, #A0522D); }

.yc-dest-image {
  width: 100px;
  min-height: 90px;
  flex-shrink: 0;
}

.yc-dest-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yc-dest-info {
  padding: 10px 12px 10px 0;
  flex: 1;
}

.yc-dest-info h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.yc-dest-score {
  color: var(--yc-yellow);
  font-weight: 700;
  font-size: 0.85rem;
}

.yc-dest-desc {
  font-size: 0.8rem;
  color: var(--yc-text-light);
  margin-top: 4px;
  margin-bottom: 0;
}

/* ---------- Photo Wall (Masonry) ---------- */
#yc-photo-wall {
  background: var(--yc-warm-white);
}

.yc-masonry {
  column-count: 2;
  column-gap: 12px;
}

.yc-masonry-item {
  break-inside: avoid;
  margin-bottom: 12px;
  border-radius: var(--yc-radius);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.yc-masonry-item img {
  width: 100%;
  display: block;
  transition: transform var(--yc-transition);
}

.yc-masonry-item:hover img {
  transform: scale(1.05);
}

.yc-masonry-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px;
  background: linear-gradient(transparent, rgba(0,0,0,0.6));
  color: #fff;
  font-size: 0.8rem;
  opacity: 0;
  transition: opacity var(--yc-transition);
}

.yc-masonry-item:hover .yc-masonry-overlay {
  opacity: 1;
}

/* ---------- Knowledge Cards ---------- */
#yc-knowledge {
  background: #fff;
}

.yc-knowledge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.yc-flip-card {
  perspective: 1000px;
  height: 220px;
}

.yc-flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.yc-flip-card:hover .yc-flip-inner {
  transform: rotateY(180deg);
}

.yc-flip-front,
.yc-flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--yc-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
}

.yc-flip-front {
  background: linear-gradient(135deg, #f0f8e8, #e8f5e0);
  border: 2px dashed var(--yc-green);
}

.yc-flip-front img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-bottom: 12px;
}

.yc-flip-back {
  background: var(--yc-green);
  color: #fff;
  transform: rotateY(180deg);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ---------- Activity Calendar ---------- */
#yc-calendar {
  background: var(--yc-warm-white);
}

.yc-timeline {
  position: relative;
  padding-left: 30px;
}

.yc-timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--yc-green), var(--yc-yellow));
  border-radius: 2px;
}

.yc-timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding: 16px;
  background: #fff;
  border-radius: var(--yc-radius);
  box-shadow: 0 2px 10px var(--yc-shadow);
}

.yc-timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--yc-green);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--yc-green);
}

.yc-timeline-date {
  font-size: 0.8rem;
  color: var(--yc-purple);
  font-weight: 700;
  margin-bottom: 4px;
}

.yc-timeline-item h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.yc-timeline-item p {
  font-size: 0.85rem;
  color: var(--yc-text-light);
  margin-bottom: 0;
}

/* ---------- Footer ---------- */
#yc-footer {
  background: linear-gradient(180deg, #2D3B1A, #1A2410);
  color: rgba(255,255,255,0.8);
  padding: 48px 0 0;
}

.yc-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-bottom: 32px;
}

.yc-footer-col h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

.yc-footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--yc-yellow);
}

.yc-footer-col p {
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.yc-footer-links {
  list-style: none;
}

.yc-footer-links li {
  margin-bottom: 8px;
}

.yc-footer-links li a {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  transition: color var(--yc-transition);
}

.yc-footer-links li a:hover {
  color: var(--yc-yellow);
}

.yc-footer-honors {
  list-style: none;
  margin-top: 12px;
}

.yc-footer-honors li {
  padding: 6px 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  gap: 8px;
}

.yc-footer-honors li .yc-honor-icon {
  font-size: 1.1rem;
}

.yc-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
}

.yc-footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 4px;
}

.yc-auth-number {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 1px;
}

/* ---------- Breadcrumb ---------- */
.yc-breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--yc-text-light);
}

.yc-breadcrumb a {
  color: var(--yc-text-light);
}

.yc-breadcrumb a:hover {
  color: var(--yc-green);
}

.yc-breadcrumb span {
  margin: 0 6px;
  color: var(--yc-border);
}

/* ---------- Inner Page Hero ---------- */
.yc-page-hero {
  position: relative;
  height: 300px;
  overflow: hidden;
  margin-bottom: 0;
}

.yc-page-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.yc-page-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.5));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.yc-page-hero-overlay h1 {
  color: #fff;
  text-shadow: 0 2px 15px rgba(0,0,0,0.3);
}

/* ---------- Article Content ---------- */
.yc-article {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 16px;
}

.yc-article h2 {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--yc-border);
}

.yc-article img {
  border-radius: var(--yc-radius);
  margin: 20px 0;
}

.yc-article-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--yc-text-light);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

/* ---------- FAQ Section ---------- */
.yc-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.yc-faq-item {
  border: 1px solid var(--yc-border);
  border-radius: var(--yc-radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.yc-faq-question {
  padding: 16px 20px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fafaf5;
  transition: background var(--yc-transition);
}

.yc-faq-question:hover {
  background: #f0f5e8;
}

.yc-faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--yc-green);
  transition: transform var(--yc-transition);
}

.yc-faq-item.yc-open .yc-faq-question::after {
  transform: rotate(45deg);
}

.yc-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 20px;
}

.yc-faq-item.yc-open .yc-faq-answer {
  max-height: 500px;
  padding: 0 20px 16px;
}

/* ---------- Map / Functional Page ---------- */
.yc-map-container {
  position: relative;
  border-radius: var(--yc-radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.yc-map-container img {
  width: 100%;
}

.yc-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.yc-filter-btn {
  padding: 8px 18px;
  border: 2px solid var(--yc-border);
  border-radius: 50px;
  background: #fff;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--yc-transition);
  color: var(--yc-text);
}

.yc-filter-btn:hover,
.yc-filter-btn.yc-active {
  border-color: var(--yc-green);
  background: var(--yc-green);
  color: #fff;
}

.yc-place-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.yc-place-card {
  background: #fff;
  border-radius: var(--yc-radius);
  box-shadow: 0 2px 15px var(--yc-shadow);
  overflow: hidden;
}

.yc-place-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.yc-place-body {
  padding: 16px;
}

.yc-place-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.yc-place-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.yc-place-actions button {
  flex: 1;
  padding: 8px;
  border-radius: 8px;
  border: 2px solid var(--yc-green);
  background: transparent;
  color: var(--yc-green);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--yc-transition);
}

.yc-place-actions button:hover,
.yc-place-actions button.yc-clicked {
  background: var(--yc-green);
  color: #fff;
}

/* ---------- App Download Page ---------- */
.yc-app-hero {
  text-align: center;
  padding: 48px 16px;
  background: linear-gradient(135deg, #f0f8e8, #e8f0ff);
}

.yc-app-mockup {
  max-width: 280px;
  margin: 0 auto 32px;
  border-radius: var(--yc-radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.yc-app-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}

.yc-app-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--yc-radius);
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--yc-transition);
  min-width: 220px;
  justify-content: center;
}

.yc-app-btn-ios {
  background: linear-gradient(135deg, var(--yc-green), var(--yc-green-light));
  color: #fff;
}

.yc-app-btn-android {
  background: linear-gradient(135deg, var(--yc-purple), var(--yc-purple-light));
  color: #fff;
}

.yc-app-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--yc-shadow-lg);
  color: #fff;
}

.yc-app-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 48px;
}

.yc-app-feature {
  text-align: center;
  padding: 24px;
  background: #fff;
  border-radius: var(--yc-radius);
  box-shadow: 0 2px 15px var(--yc-shadow);
}

.yc-app-feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--yc-green), var(--yc-yellow));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
}

/* ---------- Toast Notification ---------- */
#yc-toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--yc-green);
  color: #fff;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 20px var(--yc-shadow-lg);
  z-index: 2000;
  opacity: 0;
  transition: all 0.4s ease;
  white-space: nowrap;
}

#yc-toast.yc-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---------- Partners Section ---------- */
.yc-partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}

.yc-partners-grid img {
  width: 100px;
  height: 50px;
  object-fit: contain;
  filter: grayscale(50%);
  opacity: 0.7;
  transition: all var(--yc-transition);
}

.yc-partners-grid img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* ---------- Platform Statement ---------- */
.yc-statement {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 20px;
}

.yc-statement blockquote {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--yc-green-dark);
  border-left: 4px solid var(--yc-yellow);
  padding-left: 20px;
  margin: 20px 0;
  text-align: left;
}

/* ============================================================
   Responsive Breakpoints (Mobile-First)
   320px (base) -> 768px -> 1024px -> 1440px
   ============================================================ */

/* Tablet (768px+) */
@media (min-width: 768px) {
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.8rem; }
  h3 { font-size: 1.4rem; }

  .yc-container { padding: 0 24px; }
  .yc-section { padding: 60px 0; }

  #yc-hero { height: 85vh; }

  .yc-hero-content h1 { font-size: 2.8rem; }
  .yc-hero-content p { font-size: 1.15rem; }

  .yc-video-grid { grid-template-columns: repeat(3, 1fr); }

  .yc-picnic-layout { flex-direction: row; align-items: center; }
  .yc-picnic-image { flex: 1; }
  .yc-picnic-image img { height: 350px; }
  .yc-picnic-info { flex: 1; }

  .yc-equip-grid { grid-template-columns: repeat(4, 1fr); }

  .yc-masonry { column-count: 3; }

  .yc-knowledge-grid { grid-template-columns: repeat(3, 1fr); }

  .yc-footer-grid { grid-template-columns: repeat(2, 1fr); }

  .yc-place-grid { grid-template-columns: repeat(2, 1fr); }

  .yc-app-buttons { flex-direction: row; justify-content: center; }
  .yc-app-features { grid-template-columns: repeat(2, 1fr); }

  .yc-page-hero { height: 350px; }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  .yc-nav-links {
    display: flex;
  }

  #yc-hamburger {
    display: none;
  }

  #yc-search-box {
    display: block;
  }

  .yc-share-btn {
    display: inline-block;
  }

  #yc-hero { height: 90vh; }

  .yc-hero-content h1 { font-size: 3.2rem; }

  .yc-masonry { column-count: 4; }

  .yc-footer-grid { grid-template-columns: repeat(4, 1fr); }

  .yc-app-features { grid-template-columns: repeat(4, 1fr); }

  .yc-page-hero { height: 400px; }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
  .yc-container { padding: 0 40px; }

  h1 { font-size: 2.8rem; }

  .yc-hero-content h1 { font-size: 3.6rem; }

  .yc-equip-grid { gap: 24px; }
  .yc-video-grid { gap: 24px; }
}

/* ---------- Print Styles ---------- */
@media print {
  #yc-header, #yc-footer, .yc-hero-dots, .yc-video-play-btn { display: none; }
  body { color: #000; background: #fff; }
}