* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&family=Ma+Shan+Zheng&display=swap');

:root {
    --ink-dark: #1a1a1a;
    --ink-medium: #3d3d3d;
    --ink-light: #666666;
    --paper: #f5f0e6;
    --paper-light: #faf8f3;
    --accent: #8b4513;
    --accent-light: #c4a078;
}

body {
    font-family: 'Noto Serif SC', serif;
    background: linear-gradient(135deg, #f5f0e6 0%, #e8e0d0 50%, #f5f0e6 100%);
    color: var(--ink-dark);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(ellipse at 20% 30%, rgba(0,0,0,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(0,0,0,0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(245, 240, 230, 0.7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 2rem;
    color: var(--ink-dark);
    letter-spacing: 0.2em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--ink-medium);
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--ink-dark);
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 10;
}

.hero-title {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 8rem;
    color: var(--ink-dark);
    margin-bottom: 1rem;
    text-shadow: 4px 4px 8px rgba(0,0,0,0.1);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--ink-light);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-divider {
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--ink-light), transparent);
    margin: 0 auto 3rem;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 3rem;
    font-size: 1.2rem;
    color: var(--paper);
    background: var(--ink-dark);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.6s both;
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.ink-splash {
    position: absolute;
    border-radius: 50%;
    opacity: 0.05;
    filter: blur(40px);
}

.splash-1 {
    width: 500px;
    height: 500px;
    background: var(--ink-dark);
    top: -100px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.splash-2 {
    width: 400px;
    height: 400px;
    background: var(--ink-medium);
    bottom: -50px;
    left: -50px;
    animation: float 10s ease-in-out infinite reverse;
}

.splash-3 {
    width: 300px;
    height: 300px;
    background: var(--ink-light);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float 12s ease-in-out infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(30px, -30px);
    }
}

.features-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem 8rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    padding: 3rem 2rem;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s ease;
    border: 1px solid rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent, rgba(0,0,0,0.03));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 3rem;
    color: var(--ink-dark);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--ink-dark);
}

.feature-card p {
    color: var(--ink-light);
}

.seo-links-section {
    padding: 0 2rem 5rem;
}

.seo-links-container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.62);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.seo-links-container h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--ink-dark);
}

.seo-links-intro {
    color: var(--ink-light);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.seo-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.85rem 1.5rem;
}

.seo-links-grid a {
    color: var(--ink-medium);
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: rgba(245, 240, 230, 0.75);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.seo-links-grid a:hover {
    color: var(--ink-dark);
    background: rgba(255, 255, 255, 0.92);
    transform: translateY(-2px);
}

.footer {
    text-align: center;
    padding: 2rem;
    color: var(--ink-light);
    background: rgba(0,0,0,0.02);
}

.category-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.category-search {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.category-search-row {
    width: 100%;
    max-width: 900px;
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.62);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 12px;
    padding: 1rem 1.2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.category-search-input,
.category-search-select {
    height: 44px;
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: rgba(245, 240, 230, 0.85);
    font-family: 'Noto Serif SC', serif;
    color: var(--ink-dark);
    font-size: 1rem;
    outline: none;
    padding: 0 0.9rem;
}

.category-search-input {
    flex: 1;
    min-width: 220px;
}

.category-search-select {
    min-width: 140px;
    cursor: pointer;
}

.category-search-input:focus,
.category-search-select:focus {
    border-color: rgba(0, 0, 0, 0.35);
}

.category-search-btn {
    height: 44px;
    padding: 0 1.2rem;
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: var(--ink-dark);
    color: var(--paper);
    cursor: pointer;
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.category-search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.16);
}

.category-search-btn.secondary {
    background: rgba(255, 255, 255, 0.5);
    color: var(--ink-medium);
}

.category-search-btn.secondary:hover {
    color: var(--ink-dark);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.10);
}

.poems-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--ink-light);
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.page-title {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 3rem;
    text-align: center;
    margin-bottom: 2rem;
}

.contact-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.contact-hero {
    text-align: center;
    margin-bottom: 3rem;
}

.contact-eyebrow {
    display: inline-block;
    padding: 0.35rem 1rem;
    margin-bottom: 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(0, 0, 0, 0.08);
    color: var(--ink-light);
    font-size: 0.95rem;
    letter-spacing: 0.08em;
}

.contact-intro {
    max-width: 760px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 2;
    color: var(--ink-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-card,
.contact-notice {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 12px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
}

.contact-card {
    padding: 2rem;
}

.contact-card h2,
.contact-notice h2 {
    margin-bottom: 1rem;
    font-size: 1.35rem;
    color: var(--ink-dark);
}

.contact-card p,
.contact-notice p {
    color: var(--ink-light);
    line-height: 1.95;
    margin-bottom: 1rem;
}

.contact-card p:last-child,
.contact-notice p:last-child {
    margin-bottom: 0;
}

.contact-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(139, 69, 19, 0.35);
}

.contact-link:hover {
    color: var(--ink-dark);
    border-bottom-color: var(--ink-dark);
}

.contact-notice {
    padding: 2rem 2.2rem;
}

.nav-mine-badge {
    display: inline-block;
    margin-left: 0.4rem;
    padding: 0.1rem 0.35rem;
    border-radius: 999px;
    background: rgba(26, 26, 26, 0.12);
    font-size: 0.72rem;
    vertical-align: middle;
}

.auth-modal {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.2rem;
    background: rgba(26, 26, 26, 0.36);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.auth-modal.visible {
    opacity: 1;
    visibility: visible;
}

.auth-panel,
.mine-panel {
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(0, 0, 0, 0.07);
    border-radius: 8px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.16);
}

.auth-panel {
    width: min(440px, 100%);
    position: relative;
    padding: 2.2rem;
}

.auth-close {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(245, 240, 230, 0.85);
    color: var(--ink-medium);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
}

.auth-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-eyebrow {
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.auth-header h2,
.mine-panel h2 {
    color: var(--ink-dark);
    margin-bottom: 0.7rem;
}

.auth-header p,
.mine-panel p {
    color: var(--ink-light);
    line-height: 1.8;
}

.auth-form,
.profile-field {
    display: grid;
    gap: 0.8rem;
}

.auth-form label,
.profile-field {
    color: var(--ink-medium);
}

.auth-form input,
.profile-field input {
    width: 100%;
    height: 44px;
    margin-top: 0.4rem;
    padding: 0 0.9rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: rgba(245, 240, 230, 0.88);
    color: var(--ink-dark);
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    outline: none;
}

.auth-actions,
.profile-actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.primary-btn,
.secondary-btn,
.text-btn {
    min-height: 44px;
    border-radius: 8px;
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.25s ease;
}

.primary-btn,
.secondary-btn {
    padding: 0 1.2rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
}

.primary-btn {
    background: var(--ink-dark);
    color: var(--paper);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.55);
    color: var(--ink-medium);
}

.text-btn {
    width: 100%;
    margin-top: 1rem;
    border: none;
    background: transparent;
    color: var(--accent);
}

.primary-btn:hover,
.secondary-btn:hover,
.text-btn:hover {
    transform: translateY(-2px);
}

.auth-message {
    min-height: 1.4rem;
    margin-top: 0.8rem;
    color: var(--ink-light);
    text-align: center;
}

.auth-message.error {
    color: #9d2d20;
}

.mine-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.mine-hero {
    text-align: center;
    margin-bottom: 2rem;
}

.mine-panel {
    padding: 2rem;
}

.mine-layout {
    display: grid;
    grid-template-columns: minmax(260px, 320px) 1fr;
    gap: 1.5rem;
    align-items: start;
}

.profile-panel {
    display: grid;
    gap: 1.2rem;
}

.avatar-preview {
    width: 112px;
    height: 112px;
    margin: 0 auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(26, 26, 26, 0.88);
    background-size: cover;
    background-position: center;
    color: var(--paper);
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 3rem;
}

.avatar-upload {
    text-align: center;
    color: var(--accent);
    cursor: pointer;
}

.avatar-upload input {
    display: none;
}

.profile-meta {
    display: grid;
    gap: 0.25rem;
    color: var(--ink-light);
    overflow-wrap: anywhere;
}

.profile-meta strong {
    color: var(--ink-dark);
    font-weight: 600;
}

.favorites-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.favorites-header span {
    color: var(--ink-light);
}

.favorites-list {
    display: grid;
    gap: 1rem;
}

.favorite-card,
.mine-empty {
    padding: 1.2rem;
    border-radius: 8px;
    background: rgba(245, 240, 230, 0.62);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.favorite-line {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 1.6rem;
    color: var(--ink-dark);
    margin-bottom: 0.5rem;
}

.favorite-title {
    display: inline-block;
    margin-bottom: 0.7rem;
    color: var(--accent);
    text-decoration: none;
}

.favorite-title:hover {
    color: var(--ink-dark);
}

.favorite-card p {
    color: var(--ink-light);
    line-height: 1.9;
    margin-bottom: 1rem;
}

.favorite-remove {
    min-height: 38px;
}

.mine-empty {
    color: var(--ink-light);
    line-height: 1.8;
}

.yanyu-toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    z-index: 3500;
    padding: 0.8rem 1.2rem;
    border-radius: 999px;
    background: rgba(26, 26, 26, 0.92);
    color: var(--paper);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
    opacity: 0;
    transform: translate(-50%, 12px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.yanyu-toast.visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: rgba(255,255,255,0.5);
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    color: var(--ink-medium);
    transition: all 0.3s ease;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--ink-dark);
    color: var(--paper);
}

.poems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.poem-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.4s ease;
    border: 1px solid rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

.poem-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--ink-dark), var(--ink-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.poem-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.poem-card:hover::after {
    transform: scaleX(1);
}

.poem-card h3 {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--ink-dark);
}

.poem-preview {
    font-size: 1rem;
    color: var(--ink-light);
    line-height: 1.8;
}

.poem-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 120px 2rem 4rem;
}

.back-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: rgba(255,255,255,0.6);
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    color: var(--ink-medium);
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: var(--ink-dark);
    color: var(--paper);
}

.poem-container {
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(15px);
    padding: 4rem;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}

.poem-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.poem-title {
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
}

.poem-category {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--ink-dark);
    color: var(--paper);
    border-radius: 20px;
    font-size: 0.9rem;
}

.poem-content {
    font-size: 1.3rem;
    line-height: 2.5;
    text-align: center;
    margin-bottom: 3rem;
    font-family: 'Ma Shan Zheng', cursive;
}

.poem-line {
    cursor: pointer;
    padding: 0.5rem 1.5rem;
    margin: 0.3rem 0;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: block;
    text-align: center;
}

.poem-line:hover {
    background: rgba(0,0,0,0.08);
    transform: scale(1.02);
    color: var(--ink-dark);
}

.poem-line.empty-line {
    height: 1.5rem;
    padding: 0;
    margin: 0;
    cursor: default;
}

.poem-line.empty-line:hover {
    background: transparent;
    transform: none;
}

.poem-notes,
.poem-appreciation {
    background: rgba(245,240,230,0.5);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.poem-notes h3,
.poem-appreciation h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--ink-dark);
}

.note-item {
    padding: 0.8rem 0;
    border-bottom: 1px dashed rgba(0,0,0,0.1);
}

.note-item:last-child {
    border-bottom: none;
}

.note-word {
    font-weight: 600;
    color: var(--ink-dark);
}

.note-explanation {
    color: var(--ink-light);
    margin-top: 0.3rem;
}

.tooltip {
    position: fixed;
    background: var(--ink-dark);
    color: var(--paper);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    max-width: 300px;
    max-height: 60vh;
    overflow-y: auto;
    line-height: 1.7;
    z-index: 2000;
    pointer-events: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    animation: fadeIn 0.3s ease;
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--ink-dark);
}

.tooltip.tooltip-bottom::after {
    bottom: auto;
    top: -10px;
    border-top: none;
    border-bottom: 10px solid var(--ink-dark);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.poem-image {
    width: 100%;
    height: 300px;
    margin-bottom: 2rem;
    border-radius: 8px;
    background-size: cover;
    background-position: center;
    filter: grayscale(30%);
}

.back-to-top-btn {
    position: fixed;
    right: 32px;
    bottom: 32px;
    z-index: 1500;
    padding: 0.85rem 1.2rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 999px;
    background: rgba(245, 240, 230, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    color: var(--ink-dark);
    font-family: 'Noto Serif SC', serif;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background 0.3s ease;
}

.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-btn:hover {
    background: rgba(26, 26, 26, 0.92);
    color: var(--paper);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: flex-end;
    }
    
    .poem-container {
        padding: 2rem;
    }
    
    .poem-content {
        font-size: 1.1rem;
    }

    .category-search-row {
        padding: 0.9rem 0.9rem;
    }

    .category-search-input {
        min-width: 100%;
    }

    .seo-links-section {
        padding: 0 1rem 3rem;
    }

    .seo-links-container {
        padding: 1.5rem 1rem;
    }

    .contact-page {
        padding: 110px 1rem 3rem;
    }

    .auth-panel {
        padding: 1.6rem;
    }

    .mine-page {
        padding: 110px 1rem 3rem;
    }

    .mine-layout {
        grid-template-columns: 1fr;
    }

    .mine-panel {
        padding: 1.4rem;
    }

    .favorites-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .favorite-line {
        font-size: 1.35rem;
    }

    .contact-card,
    .contact-notice {
        padding: 1.5rem;
    }

    .back-to-top-btn {
        right: 16px;
        bottom: 20px;
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }
}