/* ========================================
   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 - 使用系统字体栈 */
@import url('pk-fonts.css');

/* ---- 全局变量 ---- */
:root {
    --pk-primary: #5D4037;
    --pk-secondary: #A1887F;
    --pk-accent: #D4AF37;
    --pk-text: #F5F5F5;
    --pk-link: #BCAAA4;
    --pk-dark: #3E2723;
    --pk-darker: #2C1A12;
    --pk-card-bg: #4E342E;
    --pk-border: #6D4C41;
    --pk-shadow: rgba(0, 0, 0, 0.4);
    --pk-font-heading: 'Playfair Display', 'Noto Serif SC', 'SimSun', Georgia, serif;
    --pk-font-body: 'Lato', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}

/* ---- 全局重置 ---- */
*,
*::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-darker);
    color: var(--pk-text);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: var(--pk-link);
    text-decoration: none;
    transition: color 0.3s ease;
}

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);
    color: var(--pk-text);
    line-height: 1.3;
}

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

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

.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);
    letter-spacing: -1px;
}

.pk-logo-text {
    font-family: var(--pk-font-heading);
    font-size: 1.3rem;
    color: var(--pk-text);
    font-weight: 700;
}

.sp-logo-text {
    font-family: var(--pk-font-heading);
    font-size: 1.3rem;
    color: var(--pk-text);
    font-weight: 700;
}

.pk-nav-links {
    display: flex;
    list-style: none;
    gap: 0;
}

.pk-nav-links li {
    position: relative;
}

.pk-nav-links a {
    display: block;
    padding: 10px 18px;
    color: var(--pk-text);
    font-family: var(--pk-font-heading);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    position: relative;
    transition: color 0.3s ease;
}

.pk-nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--pk-accent);
    transition: width 0.3s ease;
}

.pk-nav-links a:hover::after,
.pk-nav-links a.pk-active::after {
    width: 70%;
}

.pk-nav-links 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: all 0.3s ease;
}

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

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

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

/* 移动端侧边菜单 */
.pk-mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--pk-dark);
    z-index: 2000;
    transition: right 0.4s 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 a {
    display: block;
    padding: 14px 0;
    color: var(--pk-text);
    font-family: var(--pk-font-heading);
    font-size: 1.1rem;
    border-bottom: 1px solid var(--pk-border);
}

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

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

.pk-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1500;
    display: none;
}

.pk-overlay.pk-open {
    display: block;
}

/* ---- 馆长推荐 (Hero) ---- */
.pk-curator {
    position: relative;
    width: 100%;
    min-height: 70vh;
    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: 800px;
    padding: 40px 24px;
}

.pk-curator-label {
    font-family: var(--pk-font-heading);
    font-size: 0.85rem;
    color: var(--pk-accent);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 16px;
}

.pk-curator-title {
    font-family: var(--pk-font-heading);
    font-size: 2.8rem;
    color: var(--pk-text);
    margin-bottom: 20px;
    line-height: 1.2;
}

.pk-curator-quote {
    font-family: var(--pk-font-heading);
    font-style: italic;
    font-size: 1.15rem;
    color: var(--pk-secondary);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}

/* ---- 通用模块标题 ---- */
.pk-section {
    padding: 60px 24px;
    max-width: 1440px;
    margin: 0 auto;
}

.pk-section-header {
    text-align: center;
    margin-bottom: 40px;
}

.pk-section-subtitle {
    font-family: var(--pk-font-heading);
    font-size: 0.8rem;
    color: var(--pk-accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.pk-section-title {
    font-family: var(--pk-font-heading);
    font-size: 2rem;
    color: var(--pk-text);
    margin-bottom: 12px;
}

.pk-section-desc {
    color: var(--pk-secondary);
    font-size: 0.95rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ---- 新入库影片 (横向滚动) ---- */
.pk-newly-archived {
    background: var(--pk-dark);
    padding: 60px 0;
}

.pk-film-strip {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 0 24px 16px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

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

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

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

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

.pk-film-card:hover {
    transform: translateY(-8px);
}

.pk-film-card img {
    width: 200px;
    height: 300px;
    object-fit: cover;
    border-radius: 4px;
    border: 2px solid var(--pk-border);
}

.pk-film-card-info {
    padding: 10px 4px;
}

.pk-film-card-title {
    font-family: var(--pk-font-heading);
    font-size: 0.9rem;
    color: var(--pk-text);
    margin-bottom: 4px;
}

.pk-film-card-date {
    font-size: 0.78rem;
    color: var(--pk-secondary);
}

/* ---- 热门索引 (翻转卡片) ---- */
.pk-popular-index {
    padding: 60px 24px;
}

.pk-index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1440px;
    margin: 0 auto;
}

.pk-index-card {
    perspective: 1000px;
    height: 360px;
    cursor: pointer;
}

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

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

.pk-index-card-front,
.pk-index-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--pk-border);
}

.pk-index-card-front {
    background: var(--pk-card-bg);
}

.pk-index-card-front img {
    width: 100%;
    height: 260px;
    object-fit: cover;
}

.pk-index-card-front-info {
    padding: 12px 16px;
}

.pk-index-card-front-title {
    font-family: var(--pk-font-heading);
    font-size: 1rem;
    color: var(--pk-text);
}

.pk-index-card-back {
    background: var(--pk-primary);
    transform: rotateY(180deg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pk-index-card-back h4 {
    font-family: var(--pk-font-heading);
    font-size: 1.1rem;
    color: var(--pk-accent);
    margin-bottom: 12px;
}

.pk-index-card-back p {
    font-size: 0.88rem;
    color: var(--pk-text);
    line-height: 1.6;
    margin-bottom: 12px;
}

.pk-rating {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--pk-accent);
    font-family: var(--pk-font-heading);
    font-size: 1rem;
}

/* ---- 分类检索 ---- */
.pk-category-search {
    background: var(--pk-dark);
    padding: 60px 24px;
}

.pk-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.pk-drawer-tag {
    background: var(--pk-primary);
    border: 1px solid var(--pk-border);
    border-radius: 4px;
    padding: 16px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.pk-drawer-tag::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 8px;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--pk-accent);
    border-radius: 50%;
}

.pk-drawer-tag:hover {
    background: var(--pk-card-bg);
    border-color: var(--pk-accent);
    transform: translateX(4px);
}

.pk-drawer-tag span {
    font-family: var(--pk-font-heading);
    font-size: 0.95rem;
    color: var(--pk-text);
}

/* ---- 主题策展 ---- */
.pk-themed-curation {
    padding: 60px 24px;
}

.pk-shelf {
    max-width: 1200px;
    margin: 0 auto;
}

.pk-shelf-row {
    background: linear-gradient(180deg, var(--pk-primary) 0%, var(--pk-dark) 100%);
    border-radius: 6px;
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--pk-border);
}

.pk-shelf-label {
    font-family: var(--pk-font-heading);
    font-size: 1.1rem;
    color: var(--pk-accent);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--pk-border);
}

.pk-shelf-books {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.pk-book {
    flex: 0 0 120px;
    text-align: center;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.pk-book:hover {
    transform: translateY(-6px);
}

.pk-book-cover {
    width: 120px;
    height: 170px;
    object-fit: cover;
    border-radius: 3px;
    border: 1px solid var(--pk-border);
    box-shadow: 3px 3px 8px var(--pk-shadow);
}

.pk-book-title {
    font-size: 0.8rem;
    color: var(--pk-text);
    margin-top: 8px;
    font-family: var(--pk-font-heading);
}

/* ---- 观影统计 ---- */
.pk-statistics {
    background: var(--pk-dark);
    padding: 60px 24px;
}

.pk-stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.pk-stat-card {
    background: var(--pk-card-bg);
    border: 1px solid var(--pk-border);
    border-radius: 6px;
    padding: 24px;
    text-align: center;
}

.pk-stat-number {
    font-family: var(--pk-font-heading);
    font-size: 2.5rem;
    color: var(--pk-accent);
    margin-bottom: 8px;
}

.pk-stat-label {
    font-size: 0.9rem;
    color: var(--pk-secondary);
}

.pk-stats-image {
    max-width: 100%;
    border-radius: 6px;
    margin-top: 24px;
    border: 1px solid var(--pk-border);
}

/* ---- 荣誉殿堂 ---- */
.pk-hall-of-fame {
    padding: 60px 24px;
}

.pk-fame-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.pk-fame-card {
    background: linear-gradient(135deg, var(--pk-card-bg), var(--pk-primary));
    border: 1px solid var(--pk-accent);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pk-fame-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--pk-shadow);
}

.pk-fame-trophy {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    object-fit: contain;
}

.pk-fame-title {
    font-family: var(--pk-font-heading);
    font-size: 1.05rem;
    color: var(--pk-accent);
    margin-bottom: 8px;
}

.pk-fame-desc {
    font-size: 0.88rem;
    color: var(--pk-secondary);
    line-height: 1.6;
}

/* ---- 社区书单 ---- */
.pk-community {
    background: var(--pk-dark);
    padding: 60px 24px;
}

.pk-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.pk-list-card {
    background: var(--pk-card-bg);
    border: 1px solid var(--pk-border);
    border-radius: 6px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.pk-list-card:hover {
    transform: translateY(-4px);
}

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

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

.pk-list-card-title {
    font-family: var(--pk-font-heading);
    font-size: 1.05rem;
    color: var(--pk-text);
    margin-bottom: 8px;
}

.pk-list-card-meta {
    font-size: 0.82rem;
    color: var(--pk-secondary);
    margin-bottom: 8px;
}

.pk-list-card-desc {
    font-size: 0.88rem;
    color: var(--pk-link);
    line-height: 1.5;
}

/* ---- 订阅更新 ---- */
.pk-subscription {
    padding: 60px 24px;
}

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

.pk-update-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--pk-border);
    align-items: center;
}

.pk-update-date {
    flex: 0 0 80px;
    text-align: center;
    font-family: var(--pk-font-heading);
}

.pk-update-day {
    font-size: 1.8rem;
    color: var(--pk-accent);
    line-height: 1;
}

.pk-update-month {
    font-size: 0.78rem;
    color: var(--pk-secondary);
}

.pk-update-content h4 {
    font-family: var(--pk-font-heading);
    font-size: 1rem;
    color: var(--pk-text);
    margin-bottom: 4px;
}

.pk-update-content p {
    font-size: 0.88rem;
    color: var(--pk-secondary);
}

/* ---- 帮助中心 ---- */
.pk-help-desk {
    background: var(--pk-dark);
    padding: 60px 24px;
}

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

.pk-faq-item {
    border-bottom: 1px solid var(--pk-border);
}

.pk-faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--pk-text);
    font-family: var(--pk-font-heading);
    font-size: 1rem;
    padding: 18px 0;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pk-faq-question:hover {
    color: var(--pk-accent);
}

.pk-faq-arrow {
    transition: transform 0.3s ease;
    font-size: 0.8rem;
    color: var(--pk-accent);
}

.pk-faq-item.pk-open .pk-faq-arrow {
    transform: rotate(180deg);
}

.pk-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.pk-faq-answer p {
    padding: 0 0 18px;
    font-size: 0.9rem;
    color: var(--pk-secondary);
    line-height: 1.7;
}

.pk-faq-item.pk-open .pk-faq-answer {
    max-height: 300px;
}

/* ---- 页脚 ---- */
#pk-footer {
    background: var(--pk-dark);
    border-top: 2px solid var(--pk-accent);
    padding: 48px 24px 24px;
}

.pk-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 32px;
}

.pk-footer-col h4 {
    font-family: var(--pk-font-heading);
    font-size: 1rem;
    color: var(--pk-accent);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--pk-border);
}

.pk-footer-col a {
    display: block;
    padding: 4px 0;
    font-size: 0.88rem;
    color: var(--pk-link);
}

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

.pk-footer-quote {
    font-family: var(--pk-font-heading);
    font-style: italic;
    font-size: 1rem;
    color: var(--pk-secondary);
    line-height: 1.6;
}

.pk-footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--pk-border);
}

.pk-footer-bottom p {
    font-size: 0.82rem;
    color: var(--pk-secondary);
    margin-bottom: 6px;
}

.pk-footer-bottom a {
    color: var(--pk-link);
    font-size: 0.82rem;
}

.pk-honor-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 8px 0;
}

.pk-honor-badge img {
    width: 20px;
    height: 20px;
    display: inline;
}

/* ---- 内页通用 ---- */
.pk-page-hero {
    position: relative;
    min-height: 40vh;
    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(2px) brightness(0.35);
}

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

.pk-page-title {
    font-family: var(--pk-font-heading);
    font-size: 2.4rem;
    color: var(--pk-text);
    margin-bottom: 12px;
}

.pk-page-subtitle {
    font-size: 1rem;
    color: var(--pk-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.pk-content-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px;
}

.pk-content-text {
    font-size: 0.95rem;
    color: var(--pk-text);
    line-height: 1.8;
    margin-bottom: 24px;
}

.pk-content-text p {
    margin-bottom: 16px;
}

/* ---- 影片网格 (内页) ---- */
.pk-movie-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
}

.pk-movie-card {
    background: var(--pk-card-bg);
    border: 1px solid var(--pk-border);
    border-radius: 6px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.pk-movie-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px var(--pk-shadow);
}

.pk-movie-card img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.pk-movie-card-body {
    padding: 12px;
}

.pk-movie-card-name {
    font-family: var(--pk-font-heading);
    font-size: 0.92rem;
    color: var(--pk-text);
    margin-bottom: 4px;
}

.pk-movie-card-meta {
    font-size: 0.78rem;
    color: var(--pk-secondary);
}

/* ---- 书架页面 ---- */
.pk-bookshelf-page {
    padding: 48px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.pk-bookshelf-toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.pk-btn {
    font-family: var(--pk-font-heading);
    padding: 10px 20px;
    border: 1px solid var(--pk-accent);
    background: transparent;
    color: var(--pk-accent);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.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: #C9A030;
}

.pk-search-box {
    display: flex;
    gap: 0;
    flex: 1;
    min-width: 200px;
}

.pk-search-input {
    flex: 1;
    padding: 10px 16px;
    background: var(--pk-card-bg);
    border: 1px solid var(--pk-border);
    border-right: none;
    color: var(--pk-text);
    font-family: var(--pk-font-body);
    font-size: 0.9rem;
    border-radius: 4px 0 0 4px;
    outline: none;
}

.pk-search-input:focus {
    border-color: var(--pk-accent);
}

.pk-search-btn {
    padding: 10px 16px;
    background: var(--pk-accent);
    border: 1px solid var(--pk-accent);
    color: var(--pk-dark);
    cursor: pointer;
    border-radius: 0 4px 4px 0;
    font-family: var(--pk-font-heading);
    font-size: 0.9rem;
}

.pk-virtual-shelf {
    background: linear-gradient(180deg, var(--pk-primary) 0%, var(--pk-dark) 100%);
    border: 2px solid var(--pk-border);
    border-radius: 8px;
    padding: 24px;
    min-height: 400px;
}

.pk-shelf-category {
    margin-bottom: 32px;
}

.pk-shelf-category-title {
    font-family: var(--pk-font-heading);
    font-size: 1.1rem;
    color: var(--pk-accent);
    margin-bottom: 16px;
    padding: 8px 16px;
    background: var(--pk-dark);
    border-radius: 4px;
    display: inline-block;
}

.pk-shelf-row-books {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    padding: 12px 0;
    border-bottom: 3px solid var(--pk-border);
    min-height: 160px;
}

.pk-shelf-book {
    width: 40px;
    height: 140px;
    border-radius: 2px;
    cursor: pointer;
    position: relative;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    font-size: 0.7rem;
    color: var(--pk-text);
    font-family: var(--pk-font-heading);
    padding: 8px 2px;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.pk-shelf-book:hover {
    transform: translateY(-10px);
}

.pk-shelf-book:nth-child(6n+1) { background: #8D6E63; }
.pk-shelf-book:nth-child(6n+2) { background: #5D4037; }
.pk-shelf-book:nth-child(6n+3) { background: #795548; }
.pk-shelf-book:nth-child(6n+4) { background: #6D4C41; }
.pk-shelf-book:nth-child(6n+5) { background: #4E342E; }
.pk-shelf-book:nth-child(6n) { background: #3E2723; border: 1px solid var(--pk-border); }

/* ---- APP下载页 ---- */
.pk-app-page {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
    text-align: center;
}

.pk-app-title {
    font-family: var(--pk-font-heading);
    font-size: 2.4rem;
    color: var(--pk-text);
    margin-bottom: 16px;
}

.pk-app-subtitle {
    font-size: 1rem;
    color: var(--pk-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.pk-app-image {
    max-width: 600px;
    width: 100%;
    border-radius: 8px;
    margin-bottom: 32px;
    border: 2px solid var(--pk-border);
}

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

.pk-app-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--pk-accent), #C9A030);
    color: var(--pk-dark);
    font-family: var(--pk-font-heading);
    font-size: 1rem;
    border-radius: 6px;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid var(--pk-accent);
}

.pk-app-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(212, 175, 55, 0.3);
    color: var(--pk-dark);
}

/* ---- 响应式断点 ---- */

/* 1440px */
@media (max-width: 1440px) {
    .pk-curator-title {
        font-size: 2.4rem;
    }
}

/* 1024px */
@media (max-width: 1024px) {
    .pk-nav-links {
        display: none;
    }

    .pk-hamburger {
        display: flex;
    }

    .pk-footer-inner {
        grid-template-columns: 1fr 1fr;
    }

    .pk-curator-title {
        font-size: 2rem;
    }

    .pk-stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 768px */
@media (max-width: 768px) {
    .pk-footer-inner {
        grid-template-columns: 1fr;
    }

    .pk-curator {
        min-height: 50vh;
    }

    .pk-curator-title {
        font-size: 1.6rem;
    }

    .pk-section-title {
        font-size: 1.6rem;
    }

    .pk-page-title {
        font-size: 1.8rem;
    }

    .pk-index-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    .pk-fame-grid {
        grid-template-columns: 1fr;
    }

    .pk-list-grid {
        grid-template-columns: 1fr;
    }

    .pk-movie-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .pk-app-title {
        font-size: 1.8rem;
    }
}

/* 360px */
@media (max-width: 360px) {
    html {
        font-size: 14px;
    }

    .pk-nav-inner {
        padding: 10px 12px;
    }

    .pk-curator-title {
        font-size: 1.3rem;
    }

    .pk-section {
        padding: 40px 12px;
    }

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

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

    .pk-movie-card img {
        height: 200px;
    }

    .pk-bookshelf-toolbar {
        flex-direction: column;
    }
}