@font-face {
  font-family: "Onest";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("assets/fonts/onest-cyrillic.woff2") format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Onest";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("assets/fonts/onest-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --ink: #101a1f;
  --ink-soft: #223039;
  --paper: #f3f4f2;
  --white: #ffffff;
  --red: #e95743;
  --red-dark: #cd3f2e;
  --mist: #dfe4e5;
  --muted: #6d7b82;
  --line: rgba(16, 26, 31, 0.16);
  --max: 1380px;
  --content: 1180px;
  --pad: clamp(1.25rem, 4vw, 4.5rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Onest", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 0.75rem; left: 0.75rem; z-index: 100; padding: 0.65rem 1rem; background: var(--white); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  height: 78px;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 244, 242, 0.92);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; gap: 0.75rem; width: max-content; text-decoration: none; font-weight: 800; letter-spacing: -0.03em; font-size: 1.25rem; }
.brand-mark { width: 2.35rem; height: 2.35rem; display: block; flex: 0 0 auto; }
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.site-nav { display: flex; gap: clamp(1.5rem, 3vw, 3.5rem); }
.site-nav a { text-decoration: none; font-size: 0.86rem; font-weight: 700; letter-spacing: 0.08em; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--red); }
.header-cta { justify-self: end; display: inline-flex; align-items: center; gap: 0.65rem; text-decoration: none; font-weight: 750; font-size: 0.88rem; }
.header-cta svg { width: 1.1rem; fill: none; stroke: currentColor; stroke-width: 1.7; }
.menu-button { display: none; }

.hero {
  max-width: var(--max);
  min-height: min(790px, calc(100vh - 78px));
  margin: 0 auto;
  padding: clamp(4.25rem, 8vw, 8rem) var(--pad) 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(330px, 0.72fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 8rem);
  overflow: hidden;
}
.eyebrow { margin: 0 0 1.4rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.2em; font-size: 0.73rem; font-weight: 800; }
.eyebrow span { color: var(--red); font-family: Georgia, serif; font-size: 0.92rem; letter-spacing: 0.08em; }
h1, h2 { margin: 0; font-weight: 800; letter-spacing: -0.055em; line-height: 0.98; text-wrap: balance; }
h1 { max-width: 920px; font-size: clamp(4rem, 7.8vw, 7.5rem); line-height: 0.88; }
h1 span { display: block; color: var(--red); }
.title-accent { color: var(--red); font-weight: 520; }
.hero-summary { max-width: 680px; margin: 2.2rem 0 0; color: var(--ink); font-size: clamp(1.3rem, 2vw, 1.65rem); font-weight: 700; line-height: 1.35; letter-spacing: -0.025em; }
.hero-lead { max-width: 690px; margin: 1.2rem 0 0; color: var(--muted); font-size: 1rem; line-height: 1.7; }
.hero-actions { margin-top: 2.2rem; display: flex; align-items: center; flex-wrap: wrap; gap: 1.4rem 2rem; }
.button { min-height: 3.45rem; padding: 0.9rem 1.25rem; display: inline-flex; align-items: center; justify-content: center; gap: 1rem; border: 1px solid transparent; text-decoration: none; font-size: 0.9rem; font-weight: 800; letter-spacing: 0.02em; transition: transform 160ms ease, background 160ms ease, border-color 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.6; }
.button-primary { color: var(--white); background: var(--red); }
.button-primary:hover { background: var(--red-dark); }
.text-link { display: inline-flex; gap: 0.65rem; align-items: center; text-underline-offset: 0.35rem; text-decoration-thickness: 1px; font-weight: 750; }
.text-link:hover { color: var(--red); }
.hero-meta { margin-top: 3.4rem; display: flex; flex-wrap: wrap; gap: 0; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700; }
.hero-meta span + span::before { content: "·"; margin: 0 0.9rem; color: var(--red); }

.hero-art { position: relative; min-height: 480px; display: grid; place-items: center; }
.character-card { position: relative; width: min(100%, 430px); aspect-ratio: 0.83; border: 1px solid var(--line); background: var(--white); display: grid; place-items: center; box-shadow: 22px 24px 0 rgba(16, 26, 31, 0.055); }
.character-card::before, .character-card::after { content: ""; position: absolute; inset: 8%; pointer-events: none; }
.character-card::before { border: 1px dashed rgba(16, 26, 31, 0.14); }
.character-card::after { background: linear-gradient(45deg, transparent calc(50% - .5px), rgba(16,26,31,.08) 50%, transparent calc(50% + .5px)), linear-gradient(-45deg, transparent calc(50% - .5px), rgba(16,26,31,.08) 50%, transparent calc(50% + .5px)); }
.character { position: relative; z-index: 2; transform: translateY(-8%); font-family: KaiTi, STKaiti, "Noto Serif SC", Georgia, serif; font-size: clamp(9rem, 17vw, 13rem); font-weight: 400; line-height: 1; }
.pronunciation { position: absolute; left: 8%; right: 8%; bottom: 8%; z-index: 2; padding-top: 1rem; display: flex; justify-content: space-between; align-items: end; border-top: 1px solid var(--line); }
.pinyin { color: var(--red); font-weight: 800; font-size: 1.2rem; }
.meaning { text-align: right; font-size: 0.73rem; text-transform: uppercase; letter-spacing: 0.14em; font-weight: 750; line-height: 1.5; }
.stroke-note { position: absolute; top: 4%; left: 5%; color: var(--muted); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; }
.seal { position: absolute; left: 0; top: 3%; z-index: 3; width: 4.5rem; height: 4.5rem; display: grid; place-items: center; border: 2px solid var(--red); color: var(--red); font-family: Georgia, serif; font-size: 2rem; transform: rotate(-8deg); }
.vertical-note { position: absolute; right: -1.2rem; top: 8%; color: rgba(16, 26, 31, 0.3); font-family: Georgia, serif; font-size: 0.9rem; letter-spacing: 0.42em; writing-mode: vertical-rl; }

.product-index { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-index a { min-height: 94px; padding: 0 var(--pad); display: grid; grid-template-columns: 5rem 1fr 1fr auto; gap: 1rem; align-items: center; text-decoration: none; border-top: 1px solid var(--line); transition: background 160ms ease, color 160ms ease; }
.product-index a:first-child { border-top: 0; }
.product-index a:hover { background: var(--ink); color: var(--white); }
.index-number { color: var(--red); font-weight: 650; }
.index-name { font-weight: 850; font-size: 1.35rem; letter-spacing: -0.03em; }
.index-copy { color: var(--muted); font-size: 0.91rem; }
.product-index a:hover .index-copy { color: rgba(255,255,255,.65); }
.index-arrow { font-size: 1.4rem; }

.product-section { padding: clamp(5rem, 9vw, 9rem) var(--pad); }
.section-kicker { max-width: var(--content); margin: 0 auto clamp(3rem, 6vw, 6rem); padding-bottom: 1.1rem; display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; font-weight: 800; }
.section-heading { max-width: var(--content); margin: 0 auto; display: grid; grid-template-columns: 1.3fr 0.7fr; align-items: end; gap: 4rem; }
.section-heading h2, .talk-copy h2, .channel-copy h2, .final-cta h2 { font-size: clamp(2.8rem, 5.4vw, 5.5rem); }
.section-heading > p { margin: 0; color: var(--ink-soft); font-size: 1.05rem; line-height: 1.75; }
.product-visual { max-width: var(--max); margin: 4rem auto 0; padding: 0.75rem; overflow: hidden; border: 1px solid var(--line); background: #e2e6e6; box-shadow: 0 1.4rem 3.5rem rgba(16,26,31,.09); }
.window-chrome { height: 42px; padding: 0 1rem; display: flex; align-items: center; gap: 0.45rem; border-bottom: 1px solid var(--line); background: var(--white); }
.window-chrome span { width: 0.62rem; height: 0.62rem; border-radius: 50%; border: 1px solid rgba(16,26,31,.25); }
.window-chrome span:first-child { background: var(--red); border-color: var(--red); }
.window-chrome small { margin-left: auto; color: var(--muted); font-size: 0.66rem; letter-spacing: 0.12em; }
.product-visual-media { overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: thin; scrollbar-color: var(--red) transparent; }
.product-visual img { width: 100%; min-width: 1280px; height: auto; display: block; border: 1px solid rgba(16,26,31,.12); image-rendering: auto; }
.feature-list { max-width: var(--content); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); border-left: 1px solid var(--line); }
.feature-list article { padding: 2.2rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-list article > span { color: var(--red); font-size: 0.7rem; font-weight: 800; }
.feature-list h3 { margin: 2.5rem 0 0.8rem; font-size: 1.12rem; letter-spacing: -0.02em; }
.feature-list p { margin: 0; color: var(--muted); font-size: 0.91rem; line-height: 1.7; }
.download-row { max-width: var(--content); margin: 0 auto; padding: 2rem 0; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); }
.download-row > div { display: flex; flex-direction: column; }
.download-row strong { font-size: 1.1rem; }
.download-row span { color: var(--muted); font-size: 0.8rem; }
.button[aria-busy="true"] { cursor: wait; opacity: 0.72; pointer-events: none; }
.button.download-error { outline: 2px solid currentColor; outline-offset: 3px; }
.button-dark { background: var(--ink); color: var(--white); }
.button-dark:hover { background: var(--red); }

.hantalk { color: var(--white); background: var(--ink); }
.section-kicker.light { color: rgba(255,255,255,.5); border-color: rgba(255,255,255,.17); }
.talk-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1fr minmax(360px, .62fr); align-items: center; gap: clamp(4rem, 10vw, 10rem); }
.talk-copy .eyebrow { color: rgba(255,255,255,.5); }
.button-paper { margin-top: 2.3rem; color: var(--ink); background: var(--paper); }
.button-paper:hover { color: var(--white); background: var(--red); }
.phone { width: min(100%, 430px); justify-self: end; overflow: hidden; border: 8px solid #243239; border-radius: 2rem; color: var(--ink); background: #e8eeef; box-shadow: 0 2rem 5rem rgba(0,0,0,.3); }
.phone-top { min-height: 76px; padding: 0.85rem 1rem; display: flex; align-items: center; gap: 0.8rem; border-bottom: 1px solid rgba(16,26,31,.1); background: var(--white); }
.bot-avatar { width: 2.6rem; height: 2.6rem; flex: 0 0 2.6rem; display: block; border-radius: 50%; object-fit: cover; }
.phone-top div { display: flex; flex-direction: column; }
.phone-top strong { line-height: 1.2; }
.phone-top small { color: var(--muted); }
.more { margin-left: auto; font-weight: 800; letter-spacing: 0.15em; }
.chat { min-height: 510px; padding: 1rem; display: flex; flex-direction: column; justify-content: flex-end; gap: 0.65rem; background: radial-gradient(circle at center, rgba(255,255,255,.5) 0 1px, transparent 1px) 0 0 / 18px 18px, #e5ebec; }
.message { position: relative; width: fit-content; max-width: 88%; padding: 0.72rem 0.85rem 1.25rem; border-radius: 0.9rem; font-size: 0.95rem; line-height: 1.45; box-shadow: 0 2px 3px rgba(16,26,31,.08); }
.message time { position: absolute; right: 0.55rem; bottom: 0.25rem; color: var(--muted); font-size: 0.58rem; }
.message-user { align-self: flex-end; background: #d9f2d0; border-bottom-right-radius: 0.25rem; }
.message-bot { background: var(--white); border-bottom-left-radius: 0.25rem; }
.spoiler { width: 100%; margin-top: 0.55rem; padding: 0.5rem 0; border: 0; border-top: 1px solid rgba(16,26,31,.1); color: var(--ink-soft); background: transparent; text-align: left; cursor: pointer; font-size: 0.73rem; }
.spoiler-content { display: none; color: var(--ink-soft); }
.spoiler[aria-expanded="true"] .spoiler-label { display: none; }
.spoiler[aria-expanded="true"] .spoiler-content { display: block; }
.phone-input { margin: 0.6rem; padding: 0.65rem 0.75rem; display: flex; justify-content: space-between; align-items: center; border-radius: 1rem; color: var(--muted); background: var(--white); font-size: 0.85rem; }
.phone-input i { width: 1.8rem; height: 1.8rem; display: grid; place-items: center; border-radius: 50%; color: var(--white); background: var(--red); font-style: normal; }
.talk-features { max-width: var(--max); margin: 6rem auto 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.16); }
.talk-features > div { min-height: 145px; padding: 1.8rem; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid rgba(255,255,255,.16); }
.talk-features > div:last-child { border-right: 0; }
.talk-features strong { color: var(--red); font-size: 1.15rem; }
.talk-features span { color: rgba(255,255,255,.62); font-size: 0.83rem; line-height: 1.5; }

.channel-section { max-width: var(--max); margin: 0 auto; padding: clamp(5rem, 10vw, 10rem) var(--pad); display: grid; grid-template-columns: .25fr 1fr .75fr; gap: clamp(2rem, 6vw, 7rem); align-items: center; }
.channel-mark { color: var(--red); font-family: KaiTi, STKaiti, Georgia, serif; font-size: clamp(6rem, 12vw, 11rem); opacity: 0.28; }
.channel-copy > p:not(.eyebrow) { max-width: 650px; margin: 2rem 0; color: var(--muted); font-size: 1.03rem; line-height: 1.75; }
.channel-card { position: relative; padding: 3rem 2.5rem; border-top: 4px solid var(--red); background: var(--white); box-shadow: 1.2rem 1.2rem 0 rgba(16,26,31,.06); color: inherit; text-decoration: none; transition: transform 160ms ease; }
.channel-card:hover { transform: translateY(-3px); }
.channel-card p { margin: 0; font-family: inherit; font-size: clamp(1.4rem, 2.2vw, 2rem); font-weight: 650; line-height: 1.35; letter-spacing: -0.025em; }
.quote-mark { position: absolute; right: 1.2rem; top: -1rem; color: var(--red); font-family: Georgia, serif; font-size: 5rem; line-height: 1; }
.channel-handle { display: block; margin-top: 2.5rem; color: var(--muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; font-weight: 800; }

.final-cta { position: relative; min-height: 630px; padding: 7rem var(--pad); display: flex; flex-direction: column; align-items: center; justify-content: center; overflow: hidden; color: var(--white); background: var(--ink-soft); text-align: center; }
.final-cta .eyebrow { color: rgba(255,255,255,.54); }
.final-cta .hero-actions { justify-content: center; }
.button-outline { color: var(--white); border-color: rgba(255,255,255,.55); }
.button-outline:hover { border-color: var(--white); background: var(--white); color: var(--ink); }
.final-character { position: absolute; right: 3vw; top: 50%; transform: translateY(-50%); color: rgba(255,255,255,.035); font-family: Georgia, serif; font-size: clamp(14rem, 30vw, 36rem); line-height: 1; white-space: nowrap; pointer-events: none; }
.final-cta > *:not(.final-character) { position: relative; z-index: 2; }

.site-footer { min-height: 150px; padding: 2.5rem var(--pad); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; background: var(--ink); color: var(--white); }
.site-footer p { color: rgba(255,255,255,.45); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; }
.site-footer > div { justify-self: end; display: flex; gap: 1.5rem; }
.site-footer > div a { color: rgba(255,255,255,.68); font-size: 0.78rem; text-underline-offset: 0.3rem; }

:focus-visible { outline: 3px solid #1976d2; outline-offset: 4px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .header-cta { display: none; }
  .menu-button { position: relative; z-index: 2; width: 2.8rem; height: 2.8rem; padding: 0.7rem; display: flex; flex-direction: column; justify-content: center; gap: 0.45rem; border: 0; background: transparent; cursor: pointer; }
  .menu-button span:not(.sr-only) { display: block; width: 100%; height: 2px; background: var(--ink); transition: transform 160ms ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 77px 0 auto; padding: 2rem var(--pad); display: none; flex-direction: column; gap: 1.4rem; border-bottom: 1px solid var(--line); background: var(--paper); }
  .site-nav.open { display: flex; }
  .hero { grid-template-columns: 1fr; }
  .hero-art { min-height: 420px; }
  .character-card { max-width: 390px; }
  .section-heading { grid-template-columns: 1fr; gap: 2rem; }
  .talk-grid { grid-template-columns: 1fr; }
  .phone { justify-self: center; }
  .talk-features { grid-template-columns: repeat(3, 1fr); }
  .channel-section { grid-template-columns: .25fr 1fr; }
  .channel-card { grid-column: 2; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .site-footer p { display: none; }
}

@media (max-width: 680px) {
  :root { --pad: 1.2rem; }
  .site-header { height: 68px; }
  .site-nav { inset-block-start: 67px; }
  .hero { min-height: auto; padding-top: 4rem; padding-bottom: 3.5rem; gap: 3rem; }
  h1 { font-size: clamp(3.1rem, 14.5vw, 4.5rem); line-height: 0.9; }
  .hero-summary { margin-top: 1.6rem; }
  .hero-art { min-height: 380px; }
  .character-card { width: 88%; box-shadow: 12px 14px 0 rgba(16,26,31,.055); }
  .seal { left: 1%; width: 3.6rem; height: 3.6rem; }
  .vertical-note { right: 0; }
  .product-index a { min-height: 84px; grid-template-columns: 2.5rem 1fr auto; }
  .index-copy { display: none; }
  .index-name { font-size: 1.15rem; }
  .section-heading h2, .talk-copy h2, .channel-copy h2, .final-cta h2 { font-size: clamp(2.65rem, 13vw, 4rem); }
  .product-visual { margin-top: 3rem; }
  .window-chrome { height: 34px; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-list article { padding: 1.5rem 1rem 1.8rem; }
  .feature-list h3 { margin-top: 1.5rem; }
  .download-row { align-items: stretch; flex-direction: column; gap: 1.4rem; }
  .talk-grid { gap: 3rem; }
  .phone { border-width: 5px; border-radius: 1.6rem; }
  .chat { min-height: 470px; }
  .talk-features { margin-top: 4rem; grid-template-columns: 1fr; }
  .talk-features > div { min-height: 115px; padding: 1.3rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.16); }
  .channel-section { display: block; }
  .channel-mark { margin-bottom: -2rem; }
  .channel-card { margin-top: 3rem; padding: 2.25rem 1.5rem; }
  .final-cta { min-height: 580px; align-items: stretch; text-align: left; }
  .final-cta .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .site-footer { display: flex; flex-direction: column; align-items: flex-start; }
  .site-footer > div { flex-direction: column; gap: 0.6rem; }
}