:root {
  --ink: #1d2a26;
  --muted: #5d6b66;
  --accent: #e25b45;
  --accent-deep: #c94733;
  --leaf: #2f7a62;
  --leaf-soft: #d7efe6;
  --surface: rgba(255, 255, 255, 0.78);
  --line: rgba(47, 122, 98, 0.18);
  --shadow: 0 18px 40px rgba(29, 42, 38, 0.08);
  --radius: 18px;
  --font-display: "Ma Shan Zheng", "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-body: "Noto Serif SC", "Songti SC", serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--font-body);
  background: #eef6f2;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, #c8ebe0 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 100% 0%, #ffe2d8 0%, transparent 50%),
    linear-gradient(160deg, #eef7f3 0%, #f5faf8 45%, #eef3f8 100%);
}

.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(47, 122, 98, 0.12) 1px, transparent 0);
  background-size: 22px 22px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent 85%);
}

.site-header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.4rem 1.25rem 0.5rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.85rem;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--leaf), #3f9a7c);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.35rem;
  box-shadow: 0 8px 18px rgba(47, 122, 98, 0.28);
  animation: pop-in 0.7s ease both;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
}

.brand-tag {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 3rem;
}

.site-footer {
  text-align: center;
  color: var(--muted);
  padding: 1rem 1rem 2rem;
  font-size: 0.9rem;
}

.hero {
  text-align: center;
  padding: 2.2rem 0 1.6rem;
  animation: rise 0.8s ease both;
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.6rem, 10vw, 5.8rem);
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.hero-lead {
  margin: 0.7rem 0 1.4rem;
  font-size: 1.15rem;
  color: var(--muted);
}

.search-bar {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  max-width: 420px;
  margin: 0 auto;
}

.search-bar input {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.85rem 1.1rem;
  font: inherit;
  outline: none;
  box-shadow: var(--shadow);
}

.search-bar input:focus {
  border-color: var(--leaf);
}

.search-bar button,
.primary-btn,
.copy-row button {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  color: #fff;
  font: inherit;
  cursor: pointer;
  box-shadow: 0 10px 20px rgba(226, 91, 69, 0.25);
  transition: transform 0.15s ease, filter 0.15s ease;
}

.search-bar button:hover,
.primary-btn:hover,
.copy-row button:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.meta-line {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.link-panel {
  margin: 0 0 1.6rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem 1.35rem;
  box-shadow: var(--shadow);
  animation: rise 0.75s ease both;
}

.link-panel h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.7rem;
  color: var(--leaf);
}

.link-list {
  display: grid;
  gap: 0.9rem;
}

.link-item {
  padding: 0.9rem 0.95rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(47, 122, 98, 0.12);
}

.link-meta {
  display: grid;
  gap: 0.2rem;
  margin-bottom: 0.65rem;
}

.link-meta strong {
  font-size: 1.05rem;
}

.link-meta span {
  color: var(--muted);
  font-size: 0.9rem;
}

.link-item .copy-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.link-item .copy-row input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  background: #fff;
}

.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--leaf);
  color: var(--leaf);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.copy-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  color: #fff;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}

.word-list-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sent-label {
  margin: 0 0 0.25rem;
  color: var(--leaf);
  font-weight: 700;
  font-size: 0.95rem;
}

@media (max-width: 720px) {
  .word-list-3 {
    grid-template-columns: 1fr;
  }

  .link-item .copy-row {
    flex-wrap: wrap;
  }

  .link-item .copy-row input {
    flex: 1 1 100%;
  }
}

.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: 0.65rem;
}

.char-tile {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  text-decoration: none;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 1.55rem;
  font-weight: 600;
  box-shadow: 0 8px 18px rgba(29, 42, 38, 0.04);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  animation: tile-in 0.45s ease both;
  animation-delay: calc(var(--delay, 0) * 35ms);
}

.char-tile:hover {
  transform: translateY(-3px) scale(1.04);
  border-color: var(--leaf);
  background: #fff;
  color: var(--leaf);
}

.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.8rem;
}

.pager a {
  color: var(--leaf);
  text-decoration: none;
  font-weight: 600;
}

.empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
}

.zi-page {
  max-width: 760px;
  margin: 0 auto;
}

.back-link {
  display: inline-block;
  margin: 0.5rem 0 1rem;
  color: var(--leaf);
  text-decoration: none;
  font-weight: 600;
}

.zi-hero {
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  padding: 2.2rem 1.4rem 1.8rem;
  box-shadow: var(--shadow);
  animation: rise 0.7s ease both;
}

.zi-pinyin {
  margin: 0;
  color: var(--muted);
  letter-spacing: 0.12em;
  font-size: 1.2rem;
}

.zi-char {
  margin: 0.2rem 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(5.5rem, 18vw, 8rem);
  line-height: 1;
  animation: float-soft 4s ease-in-out infinite;
}

.zi-meaning {
  margin: 0 auto;
  max-width: 34em;
  font-size: 1.12rem;
  line-height: 1.7;
}

.zi-tip {
  margin: 1rem auto 0;
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--leaf-soft);
  color: var(--leaf);
  font-size: 0.95rem;
}

.zi-warn {
  margin: 0.9rem 0 0;
  color: var(--accent-deep);
  font-size: 0.9rem;
}

.zi-section {
  margin-top: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  box-shadow: var(--shadow);
  animation: rise 0.75s ease both;
}

.zi-section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--leaf);
}

.word-list,
.sentence-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.word-list li,
.sentence-list li {
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(47, 122, 98, 0.1);
}

.word-list strong {
  font-size: 1.2rem;
  margin-right: 0.5rem;
}

.word-list p,
.sentence-list p {
  margin: 0.35rem 0 0;
  line-height: 1.65;
}

.sentence {
  font-size: 1.08rem;
}

.muted {
  color: var(--muted);
}

.panel-desc {
  margin: -0.3rem 0 1rem;
  color: var(--muted);
}

.field {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.field span {
  font-size: 0.95rem;
  color: var(--muted);
}

.field select,
.copy-row input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  font: inherit;
  background: #fff;
}

.copy-row {
  display: flex;
  gap: 0.5rem;
}

.copy-row button {
  flex-shrink: 0;
}

.result-box {
  margin-top: 1rem;
  padding-top: 0.4rem;
}

#image-preview-link {
  color: var(--leaf);
  font-weight: 600;
}

.status {
  min-height: 1.4em;
  margin: 0.8rem 0 0;
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tile-in {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: scale(0.7) rotate(-8deg);
  }
  to {
    opacity: 1;
    transform: scale(1) rotate(0);
  }
}

@keyframes float-soft {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .char-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  }

  .copy-row {
    flex-direction: column;
  }
}