:root {
  color-scheme: light;
  --ink: #18201b;
  --muted: #647066;
  --paper: #fffaf0;
  --paper-strong: #fff4dc;
  --line: rgba(45, 55, 47, 0.14);
  --green: #235947;
  --green-strong: #153f34;
  --red: #a33d2f;
  --gold: #c28a34;
  --blue: #2b6478;
  --white: #fffdf8;
  --shadow: 0 22px 70px rgba(36, 42, 34, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 8%, rgba(194, 138, 52, 0.16), transparent 28rem),
    radial-gradient(circle at 84% 16%, rgba(43, 100, 120, 0.14), transparent 24rem),
    linear-gradient(180deg, #fff8ea 0%, #f7edda 46%, #efe4cf 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(24, 32, 27, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 32, 27, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 240, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 8px 24px rgba(21, 63, 52, 0.18);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover {
  color: var(--green);
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.96fr);
  gap: 56px;
  align-items: center;
  padding: 64px 0 40px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--red);
  font-size: 14px;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.94;
  letter-spacing: 0;
}

.hero-subtitle {
  margin: 22px 0 0;
  max-width: 660px;
  font-size: clamp(20px, 3vw, 34px);
  line-height: 1.18;
  font-weight: 760;
  color: #27342c;
}

.hero-copy {
  margin: 20px 0 0;
  max-width: 620px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-weight: 800;
  font-size: 14px;
}

.button.primary {
  background: var(--green);
  color: white;
  border-color: var(--green);
  box-shadow: 0 12px 28px rgba(21, 63, 52, 0.22);
}

.button.secondary {
  background: rgba(255, 253, 248, 0.72);
  color: var(--green-strong);
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 22px 24px auto auto;
  width: 76%;
  height: 80%;
  background: linear-gradient(140deg, rgba(35, 89, 71, 0.18), rgba(194, 138, 52, 0.16));
  border-radius: 8px;
  transform: rotate(3deg);
  filter: blur(1px);
}

.app-card {
  position: relative;
  margin: 0 auto;
  width: min(430px, 100%);
  background: var(--white);
  border: 1px solid rgba(45, 55, 47, 0.18);
  border-radius: 28px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.app-top {
  padding: 22px;
  color: white;
  background:
    linear-gradient(135deg, rgba(21, 63, 52, 0.96), rgba(43, 100, 120, 0.9)),
    url("app-icon.svg");
  background-size: cover;
}

.app-top-row,
.app-stage-head,
.stroke-demo-head,
.stage-line,
.tile-pool,
.stroke-options {
  display: flex;
  align-items: center;
}

.app-top-row {
  justify-content: space-between;
  gap: 14px;
}

.app-icon {
  width: 62px;
  height: 62px;
  border-radius: 16px;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
}

.pill {
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-size: 12px;
  font-weight: 800;
}

.app-title {
  margin: 22px 0 8px;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 34px;
  font-weight: 900;
}

.app-caption {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.6;
}

.stage-panel {
  padding: 20px;
}

.app-stage-head,
.stroke-demo-head {
  justify-content: space-between;
  margin-bottom: 16px;
}

.app-stage-head strong,
.stroke-demo-head strong {
  font-size: 15px;
}

.progress {
  color: var(--red);
  font-size: 13px;
  font-weight: 850;
}

.stage-line {
  gap: 8px;
  margin: 9px 0;
}

.target {
  flex: 1;
  padding: 12px 10px;
  border: 1px solid rgba(35, 89, 71, 0.16);
  border-radius: 8px;
  background: #fff7e7;
  text-align: center;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 22px;
  font-weight: 850;
}

.target.done {
  color: var(--green);
  background: #edf7ef;
}

.stroke-demo {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.glyph-preview {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 2px solid rgba(99, 72, 39, 0.34);
  border-radius: 12px;
  background:
    linear-gradient(rgba(99, 72, 39, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 72, 39, 0.12) 1px, transparent 1px),
    #fff8e8;
  background-size: 50% 50%;
  color: var(--green-strong);
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 86px;
  font-weight: 900;
}

.stroke-status {
  display: grid;
  gap: 12px;
}

.stroke-status small {
  color: var(--muted);
  font-weight: 750;
}

.stroke-progress-bar {
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(35, 89, 71, 0.12);
}

.stroke-progress-bar span {
  display: block;
  width: 50%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--gold));
}

.stroke-options {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  padding: 14px;
  border: 1px dashed rgba(35, 89, 71, 0.2);
  border-radius: 12px;
  background: rgba(255, 247, 231, 0.72);
}

.stroke-chip {
  width: 58px;
  height: 50px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(35, 89, 71, 0.15);
  border-radius: 12px;
  background: white;
  color: var(--green-strong);
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 30px;
  font-weight: 900;
}

.stroke-chip.done {
  opacity: 0.48;
  background: rgba(35, 89, 71, 0.10);
}

.stroke-chip.active {
  border-color: rgba(163, 61, 47, 0.42);
  background: rgba(163, 61, 47, 0.12);
  color: var(--red);
}

.tile-pool {
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 118px;
  margin-top: 20px;
  padding: 14px;
  border: 1px dashed rgba(35, 89, 71, 0.2);
  border-radius: 12px;
  background: rgba(255, 247, 231, 0.72);
}

.tile {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--green);
  color: white;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 22px;
  font-weight: 850;
  box-shadow: 0 8px 20px rgba(21, 63, 52, 0.18);
}

.section {
  padding: 72px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section h2,
.doc h1,
.doc h2 {
  margin: 0;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  letter-spacing: 0;
}

.section h2 {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.04;
}

.section-head p,
.feature p,
.mode p,
.update-card p,
.doc p,
.doc li {
  color: var(--muted);
  line-height: 1.72;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature,
.mode,
.update-card,
.privacy-summary {
  background: rgba(255, 253, 248, 0.68);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 14px 38px rgba(36, 42, 34, 0.08);
}

.feature-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  margin-bottom: 18px;
  background: var(--green);
  color: white;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 24px;
  font-weight: 900;
}

.feature h3,
.mode h3,
.update-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.feature p,
.mode p,
.update-card p {
  margin: 0;
}

.update-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.update-kicker {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 6px 9px;
  border-radius: 999px;
  background: rgba(35, 89, 71, 0.10);
  color: var(--green-strong);
  font-size: 12px;
  font-weight: 850;
}

.modes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mode {
  min-height: 252px;
  display: flex;
  flex-direction: column;
}

.mode-label {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 8px;
  color: white;
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 30px;
  font-weight: 900;
}

.mode:nth-child(1) .mode-label {
  background: var(--blue);
}

.mode:nth-child(2) .mode-label {
  background: var(--red);
}

.mode:nth-child(3) .mode-label {
  background: var(--green);
}

.mode small {
  margin-top: auto;
  color: var(--gold);
  font-weight: 850;
}

.screenshot-band {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 28px;
  align-items: center;
  padding: 34px;
  border-radius: 8px;
  background: rgba(21, 63, 52, 0.92);
  color: white;
  overflow: hidden;
}

.screenshot-band h2 {
  color: white;
}

.screenshot-band p {
  color: rgba(255, 255, 255, 0.76);
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.mini-screen {
  min-height: 210px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: #fff8e8;
  color: var(--ink);
  padding: 16px;
}

.mini-screen strong {
  display: block;
  margin-bottom: 12px;
  color: var(--green-strong);
}

.mini-glyph {
  height: 82px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  border: 1px solid rgba(35, 89, 71, 0.14);
  border-radius: 8px;
  background: rgba(35, 89, 71, 0.08);
  color: var(--green-strong);
  font-family: ui-serif, "Songti SC", "STSong", Georgia, serif;
  font-size: 58px;
  font-weight: 900;
}

.mini-row {
  display: flex;
  gap: 7px;
  margin: 8px 0;
}

.mini-block {
  flex: 1;
  height: 36px;
  border-radius: 7px;
  background: rgba(35, 89, 71, 0.16);
}

.mini-block.red {
  background: rgba(163, 61, 47, 0.2);
}

.mini-block.gold {
  background: rgba(194, 138, 52, 0.24);
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 42px;
  padding: 32px 0;
  color: var(--muted);
}

.footer-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
}

.doc {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 80px;
}

.doc h1 {
  font-size: clamp(40px, 7vw, 68px);
}

.doc h2 {
  margin-top: 36px;
  font-size: 28px;
}

.doc code {
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(35, 89, 71, 0.09);
  color: var(--green-strong);
}

.privacy-summary {
  margin: 28px 0;
}

@media (max-width: 860px) {
  .nav {
    min-height: 62px;
  }

  .nav-links {
    gap: 12px;
    font-size: 13px;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 46px;
  }

  .hero-visual {
    min-height: auto;
  }

  .feature-grid,
  .update-grid,
  .modes,
  .screenshot-band {
    grid-template-columns: 1fr;
  }

  .screen-grid {
    grid-template-columns: 1fr;
  }

  .screenshot-band {
    padding: 24px;
  }
}

@media (max-width: 560px) {
  .nav {
    width: min(100% - 24px, 1120px);
    flex-wrap: wrap;
    padding: 8px 0;
    row-gap: 6px;
  }

  .nav-links {
    flex-wrap: wrap;
    row-gap: 6px;
  }

  .lang-select {
    max-width: 126px;
    padding: 6px 26px 6px 11px;
    font-size: 12px;
  }

  .brand span {
    display: none;
  }

  .page,
  .footer-inner,
  .doc {
    width: min(100% - 24px, 1120px);
  }

  .nav-links {
    gap: 10px;
  }

  .nav-links a[href*="github"] {
    display: none;
  }

  .hero {
    padding-top: 34px;
  }

  .actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .app-card {
    border-radius: 20px;
  }

  .stroke-demo,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .glyph-preview {
    max-width: 180px;
    margin: 0 auto;
  }
}

/* App Store 下载徽章 */
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-height: 48px;
  padding: 6px 18px 6px 13px;
  border-radius: 12px;
  background: #0f1512;
  color: #ffffff;
  line-height: 1.16;
  transition: transform 0.16s ease, opacity 0.16s ease;
}

.store-badge:hover {
  transform: translateY(-2px);
  opacity: 0.94;
}

.store-badge-icon {
  width: 25px;
  height: 25px;
  flex: none;
  fill: currentColor;
}

.store-badge-text {
  display: grid;
  text-align: left;
}

.store-badge-line {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  opacity: 0.8;
}

.store-badge-name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.screenshot-band .store-badge {
  background: #ffffff;
  color: #101410;
}

/* 语言切换器 */
.lang-switch {
  display: inline-flex;
  align-items: center;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  max-width: 150px;
  padding: 7px 28px 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: rgba(255, 253, 248, 0.82);
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.4 6 6.4l5-5' fill='none' stroke='%23235947' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 11px center;
  background-size: 10px 7px;
  color: var(--green-strong);
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.2;
  cursor: pointer;
}

.lang-select:hover {
  border-color: rgba(35, 89, 71, 0.42);
}

.lang-select:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}