:root {
    --color-bg-primary: #f9fafb;
    --color-bg-secondary: #ffffff;
    --color-text-primary: #111827;
    --color-text-secondary: #4b5563;
    --color-text-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-card-shadow: rgba(0, 0, 0, 0.05);
    --transition-all: all 0.3s ease;
}

.dark {
    --color-bg-primary: #111827;
    --color-bg-secondary: #1f2937;
    --color-text-primary: #f9fafb;
    --color-text-secondary: #e5e7eb;
    --color-text-muted: #9ca3af;
    --color-border: #374151;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: var(--transition-all);
    margin: 0;
    padding: 0;
}

.section-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 16px;
}
@media (min-width: 640px) {
    .section-container {
        padding: 0 24px;
    }
}
@media (min-width: 1024px) {
    .section-container {
        padding: 0 40px;
    }
}

.gradient-text {
    background: linear-gradient(90deg, #3b82f6, #2563eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dark .gradient-text {
    background: linear-gradient(90deg, #60a5fa, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.book-card {
    transition: all 0.3s ease;
    background-color: var(--color-bg-secondary);
    border-radius: 0.375rem;
    overflow: hidden;
}
.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px var(--color-card-shadow);
}

.reading-container {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.custom-shadow {
    box-shadow: 0 4px 20px var(--color-card-shadow);
}

.btn-primary {
    background-color: #3b82f6;
    color: white;
    transition: background-color 0.3s ease;
}
.btn-primary:hover {
    background-color: #2563eb;
}

.btn-secondary {
    border: 1px solid #3b82f6;
    color: #3b82f6;
    transition: all 0.3s ease;
}
.btn-secondary:hover {
    background-color: #eff6ff;
}

.dark .btn-secondary {
    border: 1px solid #3b82f6;
    color: #3b82f6;
}
.dark .btn-secondary:hover {
    background-color: #1f2937;
}

.theme-toggle {
    cursor: pointer;
    transition: var(--transition-all);
}
.theme-toggle:hover {
    color: #3b82f6;
}

/* 深色模式覆盖颜色 */
.dark .bg-white {
    background-color: var(--color-bg-secondary);
}
.dark .text-gray-800 {
    color: var(--color-text-primary);
}
.dark .text-gray-700 {
    color: var(--color-text-secondary);
}
.dark .text-gray-600 {
    color: var(--color-text-muted);
}
.dark .bg-gray-50 {
    background-color: var(--color-bg-primary);
}
.dark .border-gray-200 {
    border-color: var(--color-border);
}
.dark .shadow-sm {
    box-shadow: 0 1px 2px 0 var(--color-card-shadow);
}
.dark .custom-shadow {
    box-shadow: 0 4px 20px var(--color-card-shadow);
}

/* 通用工具类 */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.flex-grow { flex-grow: 1; }
.grid { display: grid; }
.hidden { display: none; }
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.top-2 { top: 0.5rem; }
.top-3 { top: 0.75rem; }
.right-0 { right: 0; }
.right-2 { right: 0.5rem; }
.right-3 { right: 0.75rem; }
.bottom-0 { bottom: 0; }
.bottom-4 { bottom: 1rem; }
.left-0 { left: 0; }
.left-1\/2 { left: 50%; }
.left-3 { left: 0.75rem; }
.transform { transform: translateX(-50%); }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }
.overflow-hidden { overflow: hidden; }
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.text-white { color: white; }
.text-yellow-400 { color: #FBBF24; }
.text-blue-400 { color: #60A5FA; }
.text-blue-500 { color: #3B82F6; }
.text-blue-600 { color: #2563EB; }
.text-blue-700 { color: #1D4ED8; }
.text-gray-50 { color: #F9FAFB; }
.text-gray-400 { color: #9CA3AF; }
.text-gray-500 { color: #6B7280; }
.text-gray-600 { color: #4B5563; }
.text-gray-700 { color: #374151; }
.text-gray-800 { color: #1F2937; }
.text-gray-900 { color: #111827; }
.bg-white { background-color: white; }
.bg-gray-50 { background-color: #F9FAFB; }
.bg-gray-100 { background-color: #F3F4F6; }
.bg-gray-200 { background-color: #E5E7EB; }
.bg-gray-700 { background-color: #374151; }
.bg-gray-800 { background-color: #1F2937; }
.bg-blue-50 { background-color: #EFF6FF; }
.bg-blue-100 { background-color: #DBEAFE; }
.bg-blue-600 { background-color: #2563EB; }
.bg-blue-700 { background-color: #1D4ED8; }
.bg-black\/70 { background-color: rgba(0, 0, 0, 0.7); }
.border-transparent { border-color: transparent; }
.border-gray-100 { border-color: #F3F4F6; }
.border-gray-200 { border-color: #E5E7EB; }
.border-gray-700 { border-color: #374151; }
.border-blue-600 { border-color: #2563EB; }
.border { border-width: 1px; }
.border-t { border-top-width: 1px; }
.border-b { border-bottom-width: 1px; }
.border-b-2 { border-bottom-width: 2px; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.pl-4 { padding-left: 1rem; }
.pl-10 { padding-left: 2.5rem; }
.pr-4 { padding-right: 1rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.m-0 { margin: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-16 { margin-bottom: 4rem; }
.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 0.75rem; }
.ml-4 { margin-left: 1rem; }
.ml-6 { margin-left: 1.5rem; }
.ml-12 { margin-left: 3rem; }
.ml-16 { margin-left: 4rem; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mr-4 { margin-right: 1rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.space-x-2 > * + * { margin-left: 0.5rem; }
.space-x-4 > * + * { margin-left: 1rem; }
.space-x-6 > * + * { margin-left: 1.5rem; }
.space-x-8 > * + * { margin-left: 2rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.w-full { width: 100%; }
.w-2 { width: 0.5rem; }
.w-3 { width: 0.75rem; }
.w-12 { width: 3rem; }
.w-16 { width: 4rem; }
.w-40 { width: 10rem; }
.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-2\/3 { width: 66.666667%; }
.w-1\/4 { width: 25%; }
.w-3\/4 { width: 75%; }
.h-full { height: 100%; }
.h-2 { height: 0.5rem; }
.h-3 { height: 0.75rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-56 { height: 14rem; }
.h-64 { height: 16rem; }
.h-80 { height: 20rem; }
.h-96 { height: 24rem; }
.object-cover { object-fit: cover; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.line-clamp-1 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}
.line-clamp-2 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}
.leading-relaxed { line-height: 1.625; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.opacity-50 { opacity: 0.5; }
.opacity-90 { opacity: 0.9; }
.opacity-0 { opacity: 0; }
.transition-colors { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-opacity { transition-property: opacity; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.duration-300 { transition-duration: 300ms; }

/* 响应式工具类 */
@media (min-width: 640px) {
    .sm\:flex { display: flex; }
    .sm\:block { display: block; }
    .sm\:hidden { display: none; }
    .sm\:text-xs { font-size: 0.75rem; }
    .sm\:text-sm { font-size: 0.875rem; }
    .sm\:text-base { font-size: 1rem; }
    .sm\:text-lg { font-size: 1.125rem; }
    .sm\:text-xl { font-size: 1.25rem; }
    .sm\:text-2xl { font-size: 1.5rem; }
    .sm\:text-3xl { font-size: 1.875rem; }
    .sm\:text-4xl { font-size: 2.25rem; }
    .sm\:w-16 { width: 4rem; }
    .sm\:w-20 { width: 5rem; }
    .sm\:w-24 { width: 6rem; }
    .sm\:w-32 { width: 8rem; }
    .sm\:w-48 { width: 12rem; }
    .sm\:w-auto { width: auto; }
    .sm\:h-3 { height: 0.75rem; }
    .sm\:h-16 { height: 4rem; }
    .sm\:h-20 { height: 5rem; }
    .sm\:h-24 { height: 6rem; }
    .sm\:h-28 { height: 7rem; }
    .sm\:h-56 { height: 14rem; }
    .sm\:h-64 { height: 16rem; }
    .sm\:h-80 { height: 20rem; }
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .sm\:px-4 { padding-left: 1rem; padding-right: 1rem; }
    .sm\:px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
    .sm\:px-8 { padding-left: 2rem; padding-right: 2rem; }
    .sm\:py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
    .sm\:py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
    .sm\:py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
    .sm\:py-12 { padding-top: 3rem; padding-bottom: 3rem; }
    .sm\:p-4 { padding: 1rem; }
    .sm\:p-6 { padding: 1.5rem; }
    .sm\:p-8 { padding: 2rem; }
    .sm\:mb-4 { margin-bottom: 1rem; }
    .sm\:mb-6 { margin-bottom: 1.5rem; }
    .sm\:mb-8 { margin-bottom: 2rem; }
    .sm\:mb-10 { margin-bottom: 2.5rem; }
    .sm\:mb-16 { margin-bottom: 4rem; }
    .sm\:mt-3 { margin-top: 0.75rem; }
    .sm\:mt-4 { margin-top: 1rem; }
    .sm\:ml-4 { margin-left: 1rem; }
    .sm\:mr-6 { margin-right: 1.5rem; }
    .sm\:gap-4 { gap: 1rem; }
    .sm\:gap-6 { gap: 1.5rem; }
    .sm\:gap-8 { gap: 2rem; }
    .sm\:space-x-2 > * + * { margin-left: 0.5rem; }
    .sm\:space-x-8 > * + * { margin-left: 2rem; }
    .sm\:space-y-4 > * + * { margin-top: 1rem; }
}

@media (min-width: 768px) {
    .md\:flex { display: flex; }
    .md\:block { display: block; }
    .md\:hidden { display: none; }
    .md\:flex-row { flex-direction: row; }
    .md\:justify-start { justify-content: flex-start; }
    .md\:text-left { text-align: left; }
    .md\:text-lg { font-size: 1.125rem; }
    .md\:text-xl { font-size: 1.25rem; }
    .md\:text-2xl { font-size: 1.5rem; }
    .md\:text-4xl { font-size: 2.25rem; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:w-64 { width: 16rem; }
    .md\:w-auto { width: auto; }
    .md\:mx-0 { margin-left: 0; margin-right: 0; }
    .md\:ml-12 { margin-left: 3rem; }
    .md\:ml-16 { margin-left: 4rem; }
    .md\:mb-0 { margin-bottom: 0; }
    .md\:h-96 { height: 24rem; }
    .md\:p-12 { padding: 3rem; }
}

@media (min-width: 1024px) {
    .lg\:flex-row { flex-direction: row; }
    .lg\:block { display: block; }
    .lg\:hidden { display: none; }
    .lg\:w-1\/4 { width: 25%; }
    .lg\:w-3\/4 { width: 75%; }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .lg\:mb-0 { margin-bottom: 0; }
    .lg\:mt-0 { margin-top: 0; }
    .lg\:pb-12 { padding-bottom: 3rem; }
    .lg\:pr-8 { padding-right: 2rem; }
    .lg\:pr-12 { padding-right: 3rem; }
}

@media (min-width: 1280px) {
    .xl\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .xl\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* 添加JS支持的样式 */
.mobile-menu, .mobile-search {
    transition: opacity 0.3s ease;
}

/* 最近阅读表格样式 */
.reading-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 0.5rem;
    overflow: hidden;
}

.reading-table th {
    font-weight: 500;
    text-align: left;
    padding: 0.75rem 1rem;
    background-color: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.reading-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.reading-table tr:last-child td {
    border-bottom: none;
}

.reading-table tr:hover td {
    background-color: #f9fafb;
}

/* 美化书架页面按钮 */
.bookshelf-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.bookshelf-btn-primary {
    background-color: #3b82f6;
    color: white;
}

.bookshelf-btn-primary:hover {
    background-color: #2563eb;
}

.bookshelf-btn-secondary {
    background-color: white;
    color: #4b5563;
    border: 1px solid #e5e7eb;
}

.bookshelf-btn-secondary:hover {
    background-color: #f9fafb;
}

.bookshelf-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
}

/* 进度条样式 */
.progress-bar {
    height: 0.25rem;
    background-color: #e5e7eb;
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: #3b82f6;
    border-radius: 9999px;
}

.dark .reading-table th {
    background-color: #1f2937;
    border-bottom: 1px solid #374151;
}

.dark .reading-table td {
    border-bottom: 1px solid #374151;
}

.dark .reading-table tr:hover td {
    background-color: #1f2937;
}

.dark .bookshelf-btn-secondary {
    background-color: #1f2937;
    color: #e5e7eb;
    border-color: #374151;
}

.dark .bookshelf-btn-secondary:hover {
    background-color: #111827;
}

.dark .progress-bar {
    background-color: #374151;
}

/* Dark mode form inputs */
.dark input::placeholder,
.dark textarea::placeholder {
    color: #9ca3af;
    opacity: 1;
}

.dark input,
.dark textarea,
.dark select {
    background-color: #374151;
    border-color: #4b5563;
    color: #f9fafb;
}

/* Dark mode headings and labels */
.dark h1,
.dark h2,
.dark h3,
.dark h4,
.dark h5,
.dark h6,
.dark label {
    color: #f9fafb;
}

/* Dark mode button text override - ensure theme toggle is visible */
.dark button {
    color: #f9fafb;
}

.dark button.bg-blue-600 {
    color: #ffffff;
}