/* ============================================
   墨韵诗词 v2 — Ink-Wash Poetry Website
   Color Palette:
     --ink:        #1a1a1a  (墨黑)
     --rice:       #f5f0e8  (米白)
     --mist:       #e8e2d8  (雾白)
     --stone:      #c8c0b4  (浅灰石)
     --indigo:     #4a6b7a  (黛青)
     --ochre:      #8b6f4e  (赭石)
     --seal:       #b33a3a  (朱砂红)
     --cloud:      #d8d0c4  (云灰)
   ============================================ */

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

:root {
  --ink: #1a1a1a;
  --ink-deep: #111;
  --ink-light: #3a3a3a;
  --ink-faint: #5a5a5a;
  --rice: #f5f0e8;
  --mist: #e8e2d8;
  --stone: #c8c0b4;
  --stone-light: #d8d0c4;
  --indigo: #4a6b7a;
  --indigo-light: #6a8b9a;
  --ochre: #8b6f4e;
  --ochre-light: #a8906e;
  --ochre-faint: #bfa888;
  --seal: #b33a3a;
  --seal-light: #d45555;
  --cloud: #d8d0c4;
  --white: #faf8f4;
  --font-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-calligraphy: 'Ma Shan Zheng', cursive;
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--rice);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 宣纸纹理叠加层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image:
    url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

::selection {
  background-color: var(--indigo);
  color: var(--white);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Focus Styles --- */
.nav-link:focus-visible,
.filter-btn:focus-visible,
.hero-cta:focus-visible,
.modal-close:focus-visible,
.nav-toggle:focus-visible,
.load-more-btn:focus-visible,
.feature-card:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 3px;
}

.nav-search input:focus-visible { outline: none; }
.poem-card:focus-visible,
.author-card:focus-visible { outline: 2px solid var(--seal); outline-offset: -2px; }

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 0.8rem 1.5rem;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background-color: rgba(245, 240, 232, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(200, 192, 180, 0.4);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  text-decoration: none;
  color: var(--ink);
}

.nav-logo {
  font-family: var(--font-calligraphy);
  font-size: 1.75rem;
  letter-spacing: 0.15em;
  color: var(--ink);
}

.nav-sub {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.3em;
}

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

.nav-link {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--ink-light);
  text-decoration: none;
  letter-spacing: 0.1em;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition);
  cursor: pointer;
}

/* 毛笔下划线 */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, var(--ink) 20%, var(--ink) 80%, transparent);
  transition: width 0.4s ease, left 0.4s ease;
}

.nav-link:hover { color: var(--ink); }

/* 当前页朱砂红高亮 */
.nav-link.active {
  color: var(--seal);
}

.nav-link.active::after {
  width: 100%;
  left: 0;
  background: linear-gradient(90deg, transparent, var(--seal) 20%, var(--seal) 80%, transparent);
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--stone-light);
  border-radius: 2rem;
  background-color: rgba(255, 255, 255, 0.5);
  transition: all var(--transition);
}

/* 搜索框聚焦时水墨晕染边框 */
.nav-search:focus-within {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.06), 0 0 12px rgba(26, 26, 26, 0.04);
}

.search-icon {
  width: 16px;
  height: 16px;
  color: var(--ink-faint);
  flex-shrink: 0;
  transition: color var(--transition);
}

.nav-search:focus-within .search-icon { color: var(--ink-light); }

.nav-search input {
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--ink);
  width: 120px;
}

.nav-search input::placeholder { color: var(--ink-faint); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -5px); }

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(180deg, var(--white) 0%, var(--rice) 35%, var(--mist) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.mountains {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 75%;
}

.mist-layer { animation: mist-drift 25s ease-in-out infinite; }
.mist-1 { animation-delay: -5s; }
.mist-2 { animation-delay: -12s; }

@keyframes mist-drift {
  0%, 100% { transform: translateX(0); opacity: 1; }
  50% { transform: translateX(35px); opacity: 0.65; }
}

/* 多层云雾 */
.cloud {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0.1) 60%, transparent 75%);
  filter: blur(25px);
  pointer-events: none;
}

.cloud-1 { width: 450px; height: 130px; top: 22%; left: -5%; animation: cloud-float 38s ease-in-out infinite; }
.cloud-2 { width: 350px; height: 90px; top: 33%; right: -3%; animation: cloud-float 30s ease-in-out infinite reverse; }
.cloud-3 { width: 280px; height: 70px; top: 42%; left: 30%; animation: cloud-float 42s ease-in-out infinite; animation-delay: -15s; }
.cloud-4 { width: 200px; height: 50px; top: 18%; right: 20%; animation: cloud-float 50s ease-in-out infinite reverse; animation-delay: -8s; }

@keyframes cloud-float {
  0%, 100% { transform: translateX(0) translateY(0); }
  25% { transform: translateX(45px) translateY(-10px); }
  50% { transform: translateX(25px) translateY(6px); }
  75% { transform: translateX(-25px) translateY(-4px); }
}

.ink-dot {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,26,26,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.ink-dot-1 { width: 220px; height: 220px; top: 18%; right: 12%; animation: ink-breathe 18s ease-in-out infinite; }
.ink-dot-2 { width: 160px; height: 160px; bottom: 28%; left: 8%; animation: ink-breathe 20s ease-in-out infinite reverse; }

@keyframes ink-breathe {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 0.35; }
}

/* Hero content — 视觉层级调整 */
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 0 1.5rem;
}

.hero-poem { margin-bottom: 2rem; }

/* 放大诗词正文字号，加深墨色 */
.hero-line {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4.5vw, 2.8rem);
  font-weight: 500;
  letter-spacing: 0.35em;
  line-height: 2.3;
  color: var(--ink-deep);
  opacity: 0;
  transform: translateY(18px);
  animation: poem-appear 0.9s ease forwards;
}

.hero-line-1 { animation-delay: 0.3s; }
.hero-line-2 { animation-delay: 0.6s; }
.hero-line-3 { animation-delay: 0.9s; }
.hero-line-4 { animation-delay: 1.2s; }

@keyframes poem-appear {
  to { opacity: 1; transform: translateY(0); }
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fade-in 0.8s ease 1.5s forwards;
}

/* 缩小诗名、作者字号，用浅赭石色弱化 */
.hero-title {
  font-family: var(--font-calligraphy);
  font-size: 1.05rem;
  color: var(--ochre-light);
  letter-spacing: 0.2em;
}

.hero-divider {
  width: 1px;
  height: 14px;
  background-color: var(--stone-light);
}

.hero-author {
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: var(--ochre);
  letter-spacing: 0.15em;
}

/* 朱砂红填充按钮 + 水墨晕染hover */
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 2.2rem;
  border: 1.5px solid var(--seal);
  border-radius: 2rem;
  background-color: var(--seal);
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.2em;
  cursor: pointer;
  opacity: 0;
  animation: fade-in 0.8s ease 1.8s forwards;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,0.25) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.hero-cta:hover {
  border-color: var(--seal-light);
  background-color: var(--seal-light);
  box-shadow: 0 2px 16px rgba(179, 58, 58, 0.25);
  transform: translateY(-1px);
}

.hero-cta:hover::before { opacity: 1; }

.hero-cta:active { transform: translateY(0) scale(0.98); }

.hero-cta svg { transition: transform var(--transition); }
.hero-cta:hover svg { transform: translateY(2px); }

@keyframes fade-in { to { opacity: 1; } }

/* ============================================
   Corner Decorations — 水墨竹影 + 印章
   ============================================ */
.corner-decor {
  position: fixed;
  z-index: 2;
  pointer-events: none;
  opacity: 0.045;
}

.corner-bamboo-left {
  bottom: 0;
  left: 0;
  width: 80px;
  height: 200px;
}

.corner-bamboo-right {
  top: 80px;
  right: 0;
  width: 60px;
  height: 160px;
  transform: scaleX(-1);
}

.corner-seal-top {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--seal);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-calligraphy);
  font-size: 0.9rem;
  color: var(--seal);
  opacity: 0.12;
  transform: rotate(-5deg);
  pointer-events: none;
}

.corner-seal-bottom {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 2;
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--seal);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-calligraphy);
  font-size: 0.8rem;
  color: var(--seal);
  opacity: 0.1;
  transform: rotate(3deg);
  pointer-events: none;
}

/* ============================================
   Section Common
   ============================================ */
.section {
  padding: 6rem 1.5rem;
  position: relative;
  z-index: 3;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-family: var(--font-calligraphy);
  font-size: clamp(2rem, 5vw, 2.75rem);
  color: var(--ink);
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--ink-faint);
  letter-spacing: 0.15em;
}

.section-line {
  width: 40px;
  height: 1.5px;
  background-color: var(--ochre);
  margin: 1.5rem auto 0;
}

/* ============================================
   Filter Bar
   ============================================ */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.4rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 2rem;
  background: transparent;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink-light);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  color: var(--ink-light);
  border-color: var(--stone-light);
}

.filter-btn.active {
  color: var(--seal);
  border-color: var(--seal);
  background-color: rgba(179, 58, 58, 0.06);
}

.filter-btn:active { transform: scale(0.96); }

/* ============================================
   Poem Grid
   ============================================ */
.poem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.75rem;
}

.poem-card {
  position: relative;
  padding: 2rem;
  background-color: var(--white);
  border: 1px solid rgba(200, 192, 180, 0.45);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
  overflow: hidden;
}

/* 左侧墨线 */
.poem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 2.5px;
  height: 0;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-faint) 100%);
  transition: height var(--transition-slow);
}

.poem-card:hover {
  box-shadow: 0 6px 24px rgba(26, 26, 26, 0.07);
  transform: translateY(-3px);
}

.poem-card:hover::before { height: 100%; }
.poem-card:active { transform: translateY(-1px); }

.poem-card-dynasty {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--indigo);
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
}

.poem-card-title {
  font-family: var(--font-calligraphy);
  font-size: 1.3rem;
  color: var(--ink-deep);
  letter-spacing: 0.15em;
  margin-bottom: 0.35rem;
}

.poem-card-author {
  font-family: var(--font-serif);
  font-size: 0.78rem;
  color: var(--ochre);
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.poem-card-excerpt {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--ink);
  line-height: 2;
  letter-spacing: 0.06em;
  opacity: 0.7;
}

.poem-card-tag {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.2rem 0.75rem;
  border: 1px solid var(--stone-light);
  border-radius: 2px;
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

/* ============================================
   Featured Sections — 每日诗词 / 热门 / 朝代精选
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  position: relative;
  padding: 2rem 2rem 1.75rem;
  background-color: var(--white);
  border: 1px solid rgba(200, 192, 180, 0.4);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at 100% 100%, rgba(200,192,180,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.feature-card:hover {
  box-shadow: 0 4px 20px rgba(26, 26, 26, 0.06);
  transform: translateY(-2px);
}

.feature-card:active { transform: translateY(0); }

.feature-card-label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: var(--seal);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.feature-card-title {
  font-family: var(--font-calligraphy);
  font-size: 1.2rem;
  color: var(--ink-deep);
  letter-spacing: 0.15em;
  margin-bottom: 0.25rem;
}

.feature-card-author {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  color: var(--ochre);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.feature-card-poem {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--ink);
  letter-spacing: 0.05em;
  line-height: 2.2;
  opacity: 0.75;
}

/* 每日诗词特殊卡片 */
.daily-card {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, var(--white) 0%, rgba(245,240,232,0.5) 100%);
  border: 1px solid rgba(200, 192, 180, 0.5);
}

.daily-card .feature-card-poem {
  font-size: 1.1rem;
  line-height: 2.5;
  letter-spacing: 0.12em;
  opacity: 0.85;
}

/* ============================================
   Load More
   ============================================ */
.load-more {
  text-align: center;
  margin-top: 2.5rem;
}

.load-more-btn {
  padding: 0.6rem 2.5rem;
  border: 1px solid var(--stone);
  border-radius: 2rem;
  background: transparent;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink-light);
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all var(--transition);
}

.load-more-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
  background-color: rgba(26, 26, 26, 0.03);
}

.load-more-btn:active { transform: scale(0.97); }
.load-more-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ============================================
   Loading Skeleton
   ============================================ */
.skeleton-card {
  padding: 2rem;
  background-color: var(--white);
  border: 1px solid rgba(200, 192, 180, 0.3);
  border-radius: 2px;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-line {
  height: 1em;
  background: linear-gradient(90deg, var(--stone-light) 25%, var(--mist) 50%, var(--stone-light) 75%);
  background-size: 200% 100%;
  border-radius: 2px;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.skeleton-line.short { width: 40%; height: 0.7em; margin-top: 1rem; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.long { width: 90%; }

@keyframes skeleton-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.7; } }
@keyframes skeleton-shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ============================================
   Author Grid
   ============================================ */
.author-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

.author-card {
  text-align: center;
  padding: 2.5rem 1.5rem 2rem;
  background-color: var(--white);
  border: 1px solid rgba(200, 192, 180, 0.4);
  border-radius: 2px;
  transition: all var(--transition);
}

.author-card:hover {
  box-shadow: 0 4px 20px rgba(26, 26, 26, 0.06);
  transform: translateY(-2px);
}

.author-card:active { transform: translateY(0); }

.author-avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--stone-light) 0%, var(--mist) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-calligraphy);
  font-size: 1.75rem;
  color: var(--ink);
  border: 2px solid var(--stone-light);
}

.author-name {
  font-family: var(--font-calligraphy);
  font-size: 1.2rem;
  color: var(--ink);
  letter-spacing: 0.2em;
  margin-bottom: 0.25rem;
}

.author-dynasty {
  font-size: 0.75rem;
  color: var(--indigo);
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.author-count {
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}

/* ============================================
   Dynasty Timeline
   ============================================ */
.dynasty-timeline {
  position: relative;
  padding-left: 2rem;
}

.dynasty-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--stone-light), var(--mist), var(--stone-light));
}

.dynasty-item {
  position: relative;
  padding: 1.25rem 0 1.25rem 2rem;
  border-bottom: 1px solid rgba(200, 192, 180, 0.25);
  transition: all var(--transition);
}

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

.dynasty-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 1.65rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--rice);
  border: 1.5px solid var(--stone);
  transition: all var(--transition);
}

.dynasty-item:hover::before {
  background-color: var(--seal);
  border-color: var(--seal);
}

.dynasty-item:hover { padding-left: 2.5rem; }

.dynasty-name {
  font-family: var(--font-calligraphy);
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: 0.2em;
  margin-bottom: 0.25rem;
}

.dynasty-period {
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: var(--ochre);
  letter-spacing: 0.1em;
  margin-bottom: 0.35rem;
}

.dynasty-desc {
  font-size: 0.85rem;
  color: var(--ink-faint);
  line-height: 1.6;
  letter-spacing: 0.03em;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 4rem 1.5rem;
  text-align: center;
  border-top: 1px solid rgba(200, 192, 180, 0.4);
  background-color: var(--white);
  position: relative;
  z-index: 3;
}

.footer-inner {
  max-width: 600px;
  margin: 0 auto;
}

.footer-seal {
  width: 52px;
  height: 52px;
  margin: 0 auto 1.5rem;
  border: 2px solid var(--seal);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-calligraphy);
  font-size: 1.5rem;
  color: var(--seal);
  transform: rotate(-3deg);
  opacity: 0.8;
  transition: opacity var(--transition), transform var(--transition);
}

.footer-seal:hover { opacity: 1; transform: rotate(0deg); }

.footer-text {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  margin-bottom: 0.35rem;
}

.footer-sub {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}

/* ============================================
   Modal — 增强详情页
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: rgba(26, 26, 26, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: relative;
  max-width: 680px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  background-color: var(--white);
  border: 1px solid rgba(200, 192, 180, 0.4);
  border-radius: 2px;
  padding: 3rem 2.75rem;
  transform: translateY(24px) scale(0.97);
  transition: transform var(--transition);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

/* 右上角水墨晕染装饰 */
.modal::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle at 100% 0%, rgba(200,192,180,0.18) 0%, transparent 65%);
  pointer-events: none;
  border-radius: 0 0 0 100%;
}

.modal::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle at 0% 100%, rgba(200,192,180,0.1) 0%, transparent 65%);
  pointer-events: none;
  border-radius: 100% 0 0 0;
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--stone);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition);
  z-index: 2;
}

.modal-close:hover {
  color: var(--ink);
  background-color: rgba(200, 192, 180, 0.2);
}

.modal-dynasty {
  font-size: 0.7rem;
  color: var(--indigo);
  letter-spacing: 0.25em;
  margin-bottom: 0.75rem;
}

.modal-title {
  font-family: var(--font-calligraphy);
  font-size: 2rem;
  color: var(--ink-deep);
  letter-spacing: 0.2em;
  margin-bottom: 0.35rem;
}

.modal-author {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ochre);
  letter-spacing: 0.15em;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(200, 192, 180, 0.3);
}

.modal-poem {
  text-align: center;
  margin-bottom: 2rem;
  padding: 0.5rem 0;
}

/* 放大诗词正文字号 */
.modal-poem-line {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--ink-deep);
  letter-spacing: 0.18em;
  line-height: 2.6;
}

/* 注释/译文/赏析区块 */
.modal-section {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink-faint);
  line-height: 1.9;
  letter-spacing: 0.03em;
  padding: 1.25rem 1.5rem;
  background-color: rgba(232, 226, 216, 0.25);
  border-radius: 2px;
  margin-bottom: 1rem;
  border-left: 2px solid var(--stone-light);
}

.modal-section-title {
  font-weight: 600;
  color: var(--ink-light);
  margin-bottom: 0.5rem;
  font-size: 0.82rem;
  letter-spacing: 0.15em;
}

/* ============================================
   Scroll Reveal — 渐入效果
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: rgba(245, 240, 232, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid rgba(200, 192, 180, 0.3);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-search input { width: 160px; }

  .hero { min-height: 100svh; }
  .hero-line { letter-spacing: 0.2em; }

  .section { padding: 4rem 1.25rem; }
  .poem-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .feature-grid { grid-template-columns: 1fr; }

  .author-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }

  .modal { padding: 2rem 1.5rem; max-height: 90vh; }
  .modal-title { font-size: 1.5rem; }
  .modal-poem-line { font-size: 1.1rem; }

  .corner-bamboo-left,
  .corner-bamboo-right,
  .corner-seal-top,
  .corner-seal-bottom { display: none; }
}

@media (max-width: 480px) {
  .author-grid { grid-template-columns: 1fr; }
  .hero-line { font-size: 1.3rem; line-height: 2.4; }
  .filter-bar { gap: 0.35rem; }
  .filter-btn { padding: 0.35rem 0.9rem; font-size: 0.8rem; }
  .daily-card { padding: 2rem 1.5rem; }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--rice); }
::-webkit-scrollbar-thumb { background: var(--stone-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--stone); }