/* ============================================
   片库管家 - 主样式表
   CSS前缀: pk-
   设计风格: 图书馆管理典雅风
   ============================================ */

/* --- Google Fonts 本地化替代 --- */
@font-face {
  font-family: 'Playfair Display';
  font-style: normal;
  font-weight: 400;
  src: local('Playfair Display Regular'), local('PlayfairDisplay-Regular');
  font-display: swap;
}
@font-face {
  font-family: 'Playfair Display';
  font-style: normal;
  font-weight: 700;
  src: local('Playfair Display Bold'), local('PlayfairDisplay-Bold');
  font-display: swap;
}

/* --- CSS Variables --- */
:root {
  --pk-primary: #5D4037;
  --pk-secondary: #A1887F;
  --pk-accent: #D4AF37;
  --pk-text: #F5F5F5;
  --pk-link: #BCAAA4;
  --pk-dark: #3E2723;
  --pk-card-bg: #4E342E;
  --pk-overlay: rgba(62, 39, 35, 0.85);
  --pk-font-heading: 'Playfair Display', 'Noto Serif SC', 'Georgia', serif;
  --pk-font-body: 'Lato', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
  --pk-radius: 4px;
  --pk-shadow: 0 4px 16px rgba(0,0,0,0.3);
  --pk-transition: all 0.3s ease;
}

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

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

body {
  font-family: var(--pk-font-body);
  background-color: var(--pk-dark);
  color: var(--pk-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--pk-link);
  text-decoration: none;
  transition: var(--pk-transition);
}

a:hover {
  color: var(--pk-accent);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--pk-font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--pk-text);
}

/* --- 干扰标签隐藏 --- */
.library-jammer-block {
  display: none !important;
}

/* --- 导航栏 --- */
#pk-header {
  background-color: var(--pk-primary);
  padding: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 2px solid var(--pk-accent);
}

.pk-nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
}

.pk-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.pk-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--pk-accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--pk-font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--pk-dark);
}

.pk-logo-text,
span.sp-logo-text {
  font-family: var(--pk-font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--pk-text);
  letter-spacing: 1px;
}

.pk-nav-list {
  list-style: none;
  display: flex;
  gap: 28px;
  align-items: center;
}

.pk-nav-list li a {
  font-family: var(--pk-font-heading);
  font-size: 15px;
  color: var(--pk-text);
  padding: 8px 0;
  position: relative;
  letter-spacing: 0.5px;
}

.pk-nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--pk-accent);
  transition: width 0.3s ease;
}

.pk-nav-list li a:hover::after,
.pk-nav-list li a.pk-active::after {
  width: 100%;
}

.pk-nav-list li a:hover {
  color: var(--pk-accent);
}

/* 汉堡菜单 */
.pk-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.pk-hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--pk-text);
  transition: var(--pk-transition);
}

/* 移动端侧边菜单 */
.pk-mobile-menu {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  background: var(--pk-primary);
  z-index: 2000;
  transition: right 0.35s ease;
  padding: 60px 24px 24px;
  overflow-y: auto;
  border-left: 2px solid var(--pk-accent);
}

.pk-mobile-menu.pk-open {
  right: 0;
}

.pk-mobile-menu-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--pk-text);
  font-size: 28px;
  cursor: pointer;
}

.pk-mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pk-mobile-nav-list li a {
  font-family: var(--pk-font-heading);
  font-size: 18px;
  color: var(--pk-text);
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.pk-mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 1999;
}

.pk-mobile-overlay.pk-show {
  display: block;
}

/* --- 通用容器 --- */
.pk-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.pk-section {
  padding: 60px 0;
}

.pk-section-title {
  font-family: var(--pk-font-heading);
  font-size: 32px;
  text-align: center;
  margin-bottom: 12px;
  color: var(--pk-accent);
}

.pk-section-subtitle {
  text-align: center;
  font-size: 14px;
  color: var(--pk-secondary);
  margin-bottom: 40px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.pk-section-desc {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 40px;
  color: var(--pk-link);
  font-size: 15px;
  line-height: 1.8;
}

/* --- 馆长推荐 Hero --- */
.pk-curator {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.pk-curator-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(3px) brightness(0.4);
}

.pk-curator-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  padding: 40px 24px;
}

.pk-curator-badge {
  display: inline-block;
  background: var(--pk-accent);
  color: var(--pk-dark);
  font-family: var(--pk-font-heading);
  font-size: 12px;
  padding: 4px 16px;
  border-radius: 2px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.pk-curator-content h2 {
  font-size: 36px;
  margin-bottom: 20px;
  line-height: 1.4;
}

.pk-curator-quote {
  font-style: italic;
  font-size: 16px;
  color: var(--pk-link);
  line-height: 1.9;
  border-left: 3px solid var(--pk-accent);
  padding-left: 20px;
  text-align: left;
}

/* --- 影片卡片通用 --- */
.pk-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pk-card {
  background: var(--pk-card-bg);
  border-radius: var(--pk-radius);
  overflow: hidden;
  box-shadow: var(--pk-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(212, 175, 55, 0.15);
}

.pk-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
}

.pk-card-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}

.pk-card-body {
  padding: 16px;
}

.pk-card-title {
  font-family: var(--pk-font-heading);
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--pk-text);
}

.pk-card-meta {
  font-size: 13px;
  color: var(--pk-secondary);
}

.pk-card-rating {
  color: var(--pk-accent);
  font-size: 14px;
  margin-top: 6px;
}

/* --- 新入库影片 滚动横幅 --- */
.pk-newly-archived {
  background: var(--pk-dark);
  overflow: hidden;
}

.pk-film-strip {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 20px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--pk-accent) var(--pk-primary);
  scroll-snap-type: x mandatory;
}

.pk-film-strip::-webkit-scrollbar {
  height: 6px;
}

.pk-film-strip::-webkit-scrollbar-track {
  background: var(--pk-primary);
}

.pk-film-strip::-webkit-scrollbar-thumb {
  background: var(--pk-accent);
  border-radius: 3px;
}

.pk-film-item {
  flex: 0 0 200px;
  scroll-snap-align: start;
  transition: transform 0.3s ease;
}

.pk-film-item:hover {
  transform: scale(1.05);
}

.pk-film-item img {
  border-radius: var(--pk-radius);
  border: 2px solid rgba(212, 175, 55, 0.2);
}

.pk-film-item-title {
  font-size: 14px;
  margin-top: 8px;
  text-align: center;
  color: var(--pk-text);
}

.pk-film-item-date {
  font-size: 12px;
  text-align: center;
  color: var(--pk-secondary);
}

/* --- 热门索引 翻转卡片 --- */
.pk-flip-card {
  perspective: 1000px;
  cursor: pointer;
}

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

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

.pk-flip-front,
.pk-flip-back {
  backface-visibility: hidden;
  border-radius: var(--pk-radius);
  overflow: hidden;
}

.pk-flip-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotateY(180deg);
  background: var(--pk-card-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  border: 1px solid var(--pk-accent);
}

.pk-flip-back h4 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--pk-accent);
}

.pk-flip-back p {
  font-size: 13px;
  color: var(--pk-link);
  line-height: 1.6;
}

/* --- 分类检索 抽屉标签 --- */
.pk-category-search {
  background: linear-gradient(180deg, var(--pk-dark) 0%, var(--pk-primary) 100%);
}

.pk-drawer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.pk-drawer-tag {
  background: var(--pk-card-bg);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 3px;
  padding: 16px 20px;
  text-align: center;
  font-family: var(--pk-font-heading);
  font-size: 15px;
  color: var(--pk-text);
  cursor: pointer;
  transition: var(--pk-transition);
  position: relative;
}

.pk-drawer-tag::before {
  content: '';
  display: block;
  width: 30px;
  height: 3px;
  background: var(--pk-accent);
  margin: 0 auto 10px;
  border-radius: 2px;
}

.pk-drawer-tag:hover {
  background: var(--pk-primary);
  border-color: var(--pk-accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.2);
}

/* --- 主题策展 书架 --- */
.pk-themed-curation {
  position: relative;
}

.pk-shelf-row {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.pk-shelf-item {
  flex: 0 0 160px;
  text-align: center;
}

.pk-shelf-item img {
  border-radius: 3px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.pk-shelf-item-title {
  font-size: 13px;
  margin-top: 8px;
  color: var(--pk-text);
}

/* --- 观影统计 --- */
.pk-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pk-stat-card {
  background: var(--pk-card-bg);
  border-radius: var(--pk-radius);
  padding: 30px 20px;
  text-align: center;
  border: 1px solid rgba(212, 175, 55, 0.15);
}

.pk-stat-number {
  font-family: var(--pk-font-heading);
  font-size: 42px;
  color: var(--pk-accent);
  display: block;
  margin-bottom: 8px;
}

.pk-stat-label {
  font-size: 14px;
  color: var(--pk-secondary);
}

/* --- 荣誉殿堂 --- */
.pk-hall-of-fame {
  background: linear-gradient(180deg, var(--pk-primary) 0%, var(--pk-dark) 100%);
}

.pk-fame-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pk-fame-item {
  text-align: center;
  padding: 30px 20px;
  background: var(--pk-card-bg);
  border-radius: var(--pk-radius);
  border: 1px solid rgba(212, 175, 55, 0.2);
}

.pk-fame-trophy {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--pk-accent);
}

.pk-fame-title {
  font-family: var(--pk-font-heading);
  font-size: 18px;
  color: var(--pk-accent);
  margin-bottom: 8px;
}

.pk-fame-desc {
  font-size: 13px;
  color: var(--pk-link);
  line-height: 1.6;
}

/* --- 社区书单 --- */
.pk-community-lists {
  background: var(--pk-dark);
}

.pk-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pk-list-card {
  background: var(--pk-card-bg);
  border-radius: var(--pk-radius);
  padding: 24px;
  border: 1px solid rgba(212, 175, 55, 0.15);
  transition: var(--pk-transition);
}

.pk-list-card:hover {
  border-color: var(--pk-accent);
}

.pk-list-author {
  font-size: 12px;
  color: var(--pk-secondary);
  margin-bottom: 8px;
}

.pk-list-title {
  font-family: var(--pk-font-heading);
  font-size: 18px;
  color: var(--pk-text);
  margin-bottom: 10px;
}

.pk-list-excerpt {
  font-size: 14px;
  color: var(--pk-link);
  line-height: 1.6;
}

.pk-list-count {
  margin-top: 12px;
  font-size: 13px;
  color: var(--pk-accent);
}

/* --- 订阅更新 --- */
.pk-subscription {
  background: var(--pk-primary);
}

.pk-sub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.pk-sub-item {
  display: flex;
  gap: 16px;
  background: var(--pk-card-bg);
  border-radius: var(--pk-radius);
  padding: 20px;
  border: 1px solid rgba(212, 175, 55, 0.15);
}

.pk-sub-icon {
  flex: 0 0 50px;
  height: 50px;
  background: var(--pk-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--pk-dark);
}

.pk-sub-info h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.pk-sub-info p {
  font-size: 13px;
  color: var(--pk-secondary);
}

/* --- 帮助中心 --- */
.pk-help-desk {
  background: var(--pk-dark);
}

.pk-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.pk-faq-item {
  border-bottom: 1px solid rgba(212, 175, 55, 0.15);
  padding: 20px 0;
}

.pk-faq-question {
  font-family: var(--pk-font-heading);
  font-size: 17px;
  color: var(--pk-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pk-faq-question::after {
  content: '+';
  font-size: 22px;
  color: var(--pk-accent);
  transition: transform 0.3s ease;
}

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

.pk-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  font-size: 14px;
  color: var(--pk-link);
  line-height: 1.8;
}

.pk-faq-answer.pk-show {
  max-height: 300px;
  padding-top: 12px;
}

/* --- 页脚 --- */
#pk-footer {
  background: var(--pk-primary);
  border-top: 2px solid var(--pk-accent);
  padding: 50px 0 0;
}

.pk-footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.pk-footer-col h4 {
  font-family: var(--pk-font-heading);
  font-size: 18px;
  color: var(--pk-accent);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

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

.pk-footer-links li {
  margin-bottom: 10px;
}

.pk-footer-links li a {
  font-size: 14px;
  color: var(--pk-link);
}

.pk-footer-links li a:hover {
  color: var(--pk-accent);
}

.pk-footer-quote {
  font-style: italic;
  font-size: 16px;
  color: var(--pk-link);
  line-height: 1.8;
}

.pk-footer-quote cite {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--pk-secondary);
  font-style: normal;
}

.pk-footer-bottom {
  background: var(--pk-dark);
  padding: 20px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--pk-secondary);
  line-height: 2;
}

.pk-footer-bottom a {
  color: var(--pk-link);
}

.pk-footer-honor {
  display: inline-block;
  margin: 8px 0;
  padding: 4px 12px;
  border: 1px solid var(--pk-accent);
  border-radius: 3px;
  font-size: 12px;
  color: var(--pk-accent);
}

/* --- 按钮 --- */
.pk-btn {
  display: inline-block;
  padding: 12px 28px;
  font-family: var(--pk-font-heading);
  font-size: 15px;
  border: 2px solid var(--pk-accent);
  color: var(--pk-accent);
  background: transparent;
  border-radius: var(--pk-radius);
  cursor: pointer;
  transition: var(--pk-transition);
  text-decoration: none;
  letter-spacing: 1px;
}

.pk-btn:hover {
  background: var(--pk-accent);
  color: var(--pk-dark);
}

.pk-btn-primary {
  background: var(--pk-accent);
  color: var(--pk-dark);
}

.pk-btn-primary:hover {
  background: transparent;
  color: var(--pk-accent);
}

/* --- 内页通用 --- */
.pk-page-hero {
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.pk-page-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(4px) brightness(0.35);
}

.pk-page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 24px;
}

.pk-page-hero-content h1 {
  font-size: 38px;
  margin-bottom: 12px;
}

.pk-page-hero-content p {
  font-size: 16px;
  color: var(--pk-link);
  max-width: 600px;
  margin: 0 auto;
}

.pk-page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 24px;
}

/* --- 书架页面 --- */
.pk-bookshelf-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

.pk-shelf-controls {
  display: flex;
  gap: 16px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.pk-shelf-search {
  flex: 1;
  min-width: 200px;
  padding: 12px 16px;
  background: var(--pk-card-bg);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: var(--pk-radius);
  color: var(--pk-text);
  font-size: 14px;
  font-family: var(--pk-font-body);
}

.pk-shelf-search::placeholder {
  color: var(--pk-secondary);
}

.pk-virtual-shelf {
  background: linear-gradient(180deg, #6D4C41 0%, #4E342E 100%);
  border-radius: var(--pk-radius);
  padding: 30px;
  min-height: 400px;
  border: 2px solid rgba(212, 175, 55, 0.2);
}

.pk-shelf-layer {
  background: linear-gradient(180deg, transparent 0%, rgba(93, 64, 55, 0.6) 85%, #5D4037 100%);
  padding: 20px 10px 30px;
  margin-bottom: 10px;
  border-bottom: 6px solid #6D4C41;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  display: flex;
  gap: 12px;
  align-items: flex-end;
  overflow-x: auto;
  min-height: 180px;
}

.pk-book {
  flex: 0 0 auto;
  width: 45px;
  height: 150px;
  border-radius: 2px 4px 4px 2px;
  cursor: pointer;
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  font-size: 11px;
  font-family: var(--pk-font-heading);
  color: var(--pk-text);
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  padding: 8px 4px;
  box-shadow: 2px 2px 6px rgba(0,0,0,0.4);
}

.pk-book:hover {
  transform: translateY(-15px);
}

.pk-book-1 { background: linear-gradient(90deg, #8B4513, #A0522D); }
.pk-book-2 { background: linear-gradient(90deg, #2F4F4F, #3B6363); }
.pk-book-3 { background: linear-gradient(90deg, #800020, #A52A2A); }
.pk-book-4 { background: linear-gradient(90deg, #1B3F8B, #2E5CB8); }
.pk-book-5 { background: linear-gradient(90deg, #556B2F, #6B8E23); }
.pk-book-6 { background: linear-gradient(90deg, #4A0E4E, #7B2D8E); }
.pk-book-7 { background: linear-gradient(90deg, #8B0000, #CD5C5C); }
.pk-book-8 { background: linear-gradient(90deg, #2C3E50, #34495E); }

/* --- APP下载页 --- */
.pk-app-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.pk-app-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.3);
}

.pk-app-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 600px;
  padding: 40px 24px;
}

.pk-app-content h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.pk-app-content p {
  font-size: 16px;
  color: var(--pk-link);
  margin-bottom: 30px;
  line-height: 1.8;
}

.pk-qr-placeholder {
  width: 200px;
  height: 200px;
  background: var(--pk-text);
  margin: 0 auto 30px;
  border-radius: var(--pk-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pk-dark);
  font-size: 14px;
  font-family: var(--pk-font-body);
}

.pk-app-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.pk-brass-btn {
  display: inline-block;
  padding: 14px 30px;
  background: linear-gradient(135deg, #D4AF37, #B8860B);
  color: var(--pk-dark);
  font-family: var(--pk-font-heading);
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--pk-radius);
  text-decoration: none;
  border: 2px solid #D4AF37;
  transition: var(--pk-transition);
  letter-spacing: 1px;
}

.pk-brass-btn:hover {
  background: transparent;
  color: var(--pk-accent);
}

/* --- 响应式断点 --- */
/* 1440px */
@media (max-width: 1440px) {
  .pk-container { max-width: 1200px; }
}

/* 1024px */
@media (max-width: 1024px) {
  .pk-card-grid { grid-template-columns: repeat(3, 1fr); }
  .pk-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .pk-fame-grid { grid-template-columns: repeat(2, 1fr); }
  .pk-footer-grid { grid-template-columns: repeat(2, 1fr); }
  .pk-sub-grid { grid-template-columns: 1fr; }
}

/* 768px */
@media (max-width: 768px) {
  .pk-nav-list { display: none; }
  .pk-hamburger { display: flex; }
  
  .pk-card-grid { grid-template-columns: repeat(2, 1fr); }
  .pk-list-grid { grid-template-columns: 1fr; }
  .pk-fame-grid { grid-template-columns: 1fr; }
  .pk-footer-grid { grid-template-columns: 1fr; }
  
  .pk-curator-content h2 { font-size: 28px; }
  .pk-section-title { font-size: 26px; }
  .pk-page-hero-content h1 { font-size: 30px; }
  
  .pk-section { padding: 40px 0; }
}

/* 360px */
@media (max-width: 480px) {
  html { font-size: 14px; }
  
  .pk-card-grid { grid-template-columns: 1fr; }
  .pk-stats-grid { grid-template-columns: 1fr; }
  .pk-drawer-grid { grid-template-columns: repeat(2, 1fr); }
  
  .pk-curator { min-height: 400px; }
  .pk-curator-content h2 { font-size: 24px; }
  
  .pk-nav-inner { padding: 10px 16px; }
  .pk-logo-text,
  span.sp-logo-text { font-size: 18px; }
  
  .pk-app-buttons { flex-direction: column; align-items: center; }
}

/* --- Contact Form Styles --- */
.pk-contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.pk-form-group {
  margin-bottom: 20px;
}

.pk-form-label {
  display: block;
  font-family: var(--pk-font-heading);
  font-size: 14px;
  color: var(--pk-accent);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.pk-form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--pk-card-bg);
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: var(--pk-radius);
  color: var(--pk-text);
  font-family: var(--pk-font-body);
  font-size: 15px;
  transition: var(--pk-transition);
}

.pk-form-input:focus {
  outline: none;
  border-color: var(--pk-accent);
  box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.15);
}

.pk-form-input::placeholder {
  color: var(--pk-secondary);
}

.pk-form-textarea {
  resize: vertical;
  min-height: 120px;
}

select.pk-form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23D4AF37' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}

select.pk-form-input option {
  background: var(--pk-card-bg);
  color: var(--pk-text);
}

/* --- Button Variants --- */
.pk-btn-large {
  padding: 14px 32px;
  font-size: 16px;
}

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

.pk-btn-outline:hover {
  background: var(--pk-accent);
  color: var(--pk-dark);
}

/* --- APP Hero --- */
.pk-app-hero {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.pk-app-hero .pk-page-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.pk-app-hero .pk-page-hero-content {
  position: relative;
  z-index: 1;
}