/* ═══════════════════════════════════════════════════════════════
   砚客 · Inkore · landing.css
   Editorial Warm-Ink — 严守云霜 token，衬线大字 + mono 读数
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* ─── 云霜 token · synchronized with MarkaV2/app/src/styles/tokens.css ─── */
  --workspace:        #EFEFEE;
  --card:             #FAFAF9;
  --card-hover:       #E8E8E6;
  --pill-active:      #5A5A52;
  --pill-text:        #FAFAF9;
  --text-1:           #4A4A44;
  --text-2:           #666660;
  --text-3:           #94948C;
  --divider:          rgba(74, 74, 68, 0.10);
  --divider-strong:   rgba(74, 74, 68, 0.18);
  --shadow-card:      0 1px 2px rgba(74, 74, 68, 0.05), 0 6px 18px rgba(74, 74, 68, 0.07);
  --shadow-card-hover:0 4px 6px rgba(74, 74, 68, 0.07), 0 12px 32px rgba(74, 74, 68, 0.12);
  --shadow-window:    0 24px 60px rgba(90, 90, 82, 0.20);
  --shadow-bubble:    0 8px 28px rgba(90, 90, 82, 0.16), 0 2px 6px rgba(90, 90, 82, 0.09);
  --accent:           #90908A;
  --accent-deep:      #6F6F69;
  --titlebar:         #E3E3E1;

  /* hero / surface variations for the landing page (extends product palette) */
  --ink-deep:         #2E2E2A;            /* hero display ink, slightly heavier than text-1 */
  --paper:            #F4F2EC;            /* warmer paper for editor mockup body */
  --paper-deep:       #E8E5DC;            /* paper edge / shadows */
  --ink-mark:         #C58A4A;            /* highlight underline — restrained terracotta */
  --ink-mark-faint:   rgba(197, 138, 74, 0.18);

  /* type */
  --font-serif:       'Noto Serif SC', 'Source Han Serif SC', Georgia, 'Songti SC', serif;
  --font-sans:        'Noto Sans SC', 'PingFang SC', system-ui, sans-serif;
  --font-mono:        'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* spacing scale (Notion-inspired, slightly more generous for editorial feel) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-pill: 999px;

  /* layout */
  --container: 1240px;
  --nav-h: 64px;

  color-scheme: light;
}

/* ─── reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--workspace);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* subtle paper grain via radial gradient */
  background-image:
    radial-gradient(rgba(74, 74, 68, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: 0 0;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }
em, i { font-style: italic; }

/* ─── shared section frame ─────────────────────────────────── */
.section__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

.section__head {
  margin-bottom: clamp(48px, 6vw, 80px);
  max-width: 760px;
}
.section__head--row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: end;
  max-width: 100%;
}
.section__head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  max-width: 720px;
}

.section__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--ink-deep);
  margin-top: var(--s-4);
}
.section__title--center { text-align: center; }
.section__title--single { white-space: nowrap; }

.section__lede {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-2);
  padding-bottom: var(--s-3);
}
/* ─── card meta · mono index + label ───────────────────────── */

.meta-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--accent-deep);
  letter-spacing: 0.08em;
}
.meta-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-3);
}

/* ─── buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 10px 18px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: all 180ms cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--ink-deep);
  color: var(--card);
  border-color: var(--ink-deep);
}
.btn--primary:hover {
  background: #1f1f1c;
  border-color: #1f1f1c;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(46, 46, 42, 0.18);
}
.btn--ghost {
  background: transparent;
  color: var(--text-1);
  border-color: var(--divider-strong);
}
.btn--ghost:hover {
  background: var(--card);
  border-color: var(--text-2);
}
.btn--link {
  padding: 10px 4px;
  color: var(--text-2);
  background: transparent;
}
.btn--link:hover { color: var(--ink-deep); gap: 12px; }
.btn--lg { padding: 14px 22px; font-size: 15px; }
.btn--block { width: 100%; justify-content: center; padding: 14px 18px; }
.btn__chev {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: 0.7;
}

/* ═══════════════════════════════════════════════════════════════
   NAV
   ═══════════════════════════════════════════════════════════════ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(239, 239, 238, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, background-color 200ms ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--divider);
  background: rgba(239, 239, 238, 0.92);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  height: var(--nav-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--s-7);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-deep);
}
.nav__mark { display: inline-flex; color: var(--ink-deep); }
.nav__brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.nav__brand-zh {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-deep);
}
.nav__brand-en {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s-7);
  justify-content: center;
}
.nav__links a {
  font-size: 14px;
  color: var(--text-2);
  position: relative;
  padding: 6px 0;
  transition: color 160ms ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--ink-deep);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}
.nav__links a:hover { color: var(--ink-deep); }
.nav__links a:hover::after { transform: scaleX(1); }

.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

/* ═══════════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════════ */
.hero {
  padding: clamp(80px, 12vw, 140px) 0 clamp(80px, 10vw, 128px);
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* faint vertical hairline grid behind hero for editorial feel */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--divider) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  opacity: 0.4;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.6), rgba(0,0,0,0) 80%);
}

.hero__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 4vw, 64px);
  align-items: center;
  position: relative;
}

.hero__copy {
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}

.hero__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(44px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--ink-deep);
  white-space: nowrap;
}
.hero__period {
  color: var(--ink-mark);
  font-style: normal;
  font-weight: 700;
  margin-left: 0.02em;
}

.hero__lede {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-2);
}
.hero__lede u {
  text-decoration: none;
  background-image: linear-gradient(to top, var(--ink-mark-faint) 38%, transparent 38%);
  padding: 0 2px;
}

.hero__cta {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
  margin-top: var(--s-3);
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-5);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.04em;
  padding-top: var(--s-5);
  border-top: 1px solid var(--divider);
}
.hero__chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--text-3);
  display: inline-block;
}
.dot--ok { background: #6FA47E; }
.dot--soon { background: var(--divider-strong); }

/* ─── editor mockup ─────────────────────────────────────────── */
.mockup {
  position: relative;
  perspective: 1400px;
}
.mockup__frame {
  position: relative;
  background: var(--workspace);
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-window);
  transform: rotate(0.4deg) translateZ(0);
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}
.mockup:hover .mockup__frame {
  transform: rotate(0deg) translateY(-4px);
  border-color: var(--divider-strong);
  box-shadow: var(--shadow-card-hover);
}
.mockup__shadow {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -40px;
  height: 60px;
  background: radial-gradient(ellipse at center, rgba(74,74,68,0.25), transparent 70%);
  filter: blur(20px);
  z-index: -1;
}

/* ── hi-fi replica: real four-zone structure, site tokens, vector icons ── */
.mk-titlebar {
  height: 36px;
  background: none;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  padding: 0 10px;
  gap: var(--s-3);
}
.mk-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: none;
  color: var(--text-3);
  border-radius: var(--r-sm);
}
.mk-crumb {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-3);
}
.mk-crumb-sep { color: var(--divider-strong); }
.mk-crumb-cur { color: var(--text-1); font-weight: 500; }

.mk-body {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 14px;
  padding: 0px 14px;
  min-height: 360px;
}

.mk-sidebar {
  background: var(--card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mk-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 2px;
}
.mk-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--r-sm);
  color: var(--text-3);
}
.mk-tab.is-active {
  background: var(--ink-deep);
  color: var(--card);
}
.mk-search {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--card);
  border-radius: var(--r-pill);
  padding: 7px 12px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  color: var(--text-3);
}
.mk-vault {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-3);
  padding: 2px 2px;
}
.mk-vault-name {
  font-style: italic;
  font-weight: 500;
  color: var(--text-1);
}
.mk-tree {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 1;
}
.mk-file {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-2);
  padding: 6px 8px;
  border-radius: var(--r-sm);
}
.mk-file svg { color: var(--text-3); flex: none; }
.mk-file.is-active {
  background: var(--card);
  color: var(--ink-deep);
  font-weight: 500;
}
.mk-file.is-active svg { color: var(--accent-deep); }
.mk-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-2);
  padding: 10px 4px 2px;
  margin-top: auto;
  border-top: 1px solid var(--divider);
}
.mk-switch svg { color: var(--text-3); }
.mk-switch-chev { margin-left: auto; }

.mk-editor {
  background: var(--card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  padding: 32px 40px;
  overflow: hidden;
}
.mk-doc {
  font-family: var(--font-serif);
  color: var(--text-1);
}
.mk-h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink-deep);
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.mk-p {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-1);
  margin-bottom: 14px;
}
.mk-quote {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--text-2);
  background: var(--workspace);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 12px 18px;
  margin: 0;
}
.mk-caret {
  display: inline-block;
  width: 1.5px;
  height: 1.05em;
  background: var(--ink-deep);
  vertical-align: -0.16em;
  margin-left: 1px;
  animation: mk-caret-blink 1.1s steps(2) infinite;
}
@keyframes mk-caret-blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

.mk-statusbar {
  height: 30px;
  background: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--text-3);
}
.mk-status-sep { color: var(--divider-strong); }

/* ═══════════════════════════════════════════════════════════════
   FEATURES · six cards
   ═══════════════════════════════════════════════════════════════ */
.features {
  padding: clamp(80px, 10vw, 128px) 0;
  border-top: 1px solid var(--divider);
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.4vw, 32px);
}

.feat-card {
  background: var(--card);
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: clamp(28px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
  position: relative;
}
.feat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--divider-strong);
}
.feat-card--mid { background: #F7F5EE; } /* warmer mid card for editorial rhythm */

.feat-card__illus {
  height: 156px;
  background: var(--workspace);
  border-radius: var(--r-md);
  border: 1px solid var(--divider);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--s-3);
  position: relative;
  overflow: hidden;
}
.feat-card--mid .feat-card__illus { background: #EFEBE0; }

/* 01 edit illustration: text lines + floating bubble */
.feat-card__illus--edit .illus-line {
  height: 6px;
  display: flex;
}
.feat-card__illus--edit .illus-line--lg span { background: var(--ink-deep); }
.feat-card__illus--edit .illus-line--quote {
  border-left: 2px solid var(--accent);
  padding-left: 8px;
  margin-left: -10px;
}
.illus-line span {
  display: block;
  height: 100%;
  background: var(--divider-strong);
  border-radius: 999px;
}
.illus-bubble {
  position: absolute;
  right: 18px;
  bottom: 14px;
  background: var(--ink-deep);
  color: var(--card);
  font-family: var(--font-sans);
  font-size: 10px;
  padding: 4px;
  border-radius: 6px;
  display: inline-flex;
  gap: 1px;
  box-shadow: var(--shadow-bubble);
}
.illus-bubble span {
  padding: 3px 6px;
  border-radius: 3px;
}

/* 02 split writing illustration: two panes */
.feat-card__illus--split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 18px;
}
.split-pane {
  background: var(--card);
  border: 1px solid var(--divider);
  border-radius: 6px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}
.split-pane--active {
  border-color: var(--ink-deep);
  box-shadow: 0 4px 12px rgba(74,74,68,0.08);
}
.split-line {
  height: 5px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.split-line--title {
  width: 58%;
  height: 7px;
  background: var(--accent);
}
.split-line--short { width: 72%; }

/* 03 search illustration: search box + grouped results */
.feat-card__illus--search { padding: 20px; }
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 999px;
  padding: 8px 12px;
  margin-bottom: 8px;
}
.search-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--ink-mark);
}
.search-query {
  width: 60%;
  height: 5px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.search-result {
  display: grid;
  grid-template-columns: 1fr 40px;
  align-items: center;
  gap: 10px;
  padding: 7px 8px;
  border-radius: 6px;
}
.search-result.is-active { background: var(--card); }
.search-result span,
.search-result b {
  height: 5px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.search-result b { background: var(--ink-mark-faint); }

/* 04 snapshot illustration: stacked cards */
.feat-card__illus--snap { padding: 22px; }
.snap-stack {
  position: relative;
  width: 100%;
  height: 100%;
}
.snap-card {
  position: absolute;
  left: 0; right: 0;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 8px rgba(74,74,68,0.06);
}
.snap-card--1 { top: 0; z-index: 3; }
.snap-card--2 { top: 28px; left: 12px; right: 12px; z-index: 2; opacity: 0.85; }
.snap-card--3 { top: 56px; left: 24px; right: 24px; z-index: 1; opacity: 0.6; }
.snap-card.is-current {
  border-color: var(--ink-deep);
  color: var(--ink-deep);
  font-weight: 500;
}
.snap-time::before {
  content: "●";
  color: var(--ink-mark);
  margin-right: 6px;
  font-size: 8px;
}

/* 05 export illustration: pills */
.feat-card__illus--export { padding: 22px; }
.exp-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-content: center;
  height: 100%;
}
.exp-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-1);
  background: var(--card);
  border: 1px solid var(--divider-strong);
  padding: 6px 12px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.exp-pill--ghost {
  background: transparent;
  color: var(--text-3);
  border-style: dashed;
}

/* 06 MCP illustration: bounded tool graph */
.feat-card__illus--mcp {
  align-items: center;
  justify-content: center;
}
.mcp-node {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 32px;
  padding: 0 12px;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  z-index: 1;
}
.mcp-node--main {
  min-width: 82px;
  height: 40px;
  background: var(--ink-deep);
  border-color: var(--ink-deep);
  color: var(--card);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.mcp-node:nth-of-type(2) { left: 22px; top: 24px; }
.mcp-node:nth-of-type(3) { right: 22px; top: 24px; }
.mcp-node:nth-of-type(4) { left: 50%; bottom: 22px; transform: translateX(-50%); }
.mcp-link {
  position: absolute;
  height: 1px;
  background: var(--divider-strong);
  transform-origin: left center;
}
.mcp-link--a { width: 72px; left: 74px; top: 52px; transform: rotate(27deg); }
.mcp-link--b { width: 72px; right: 74px; top: 52px; transform: rotate(153deg); }
.mcp-link--c { width: 62px; left: 50%; bottom: 58px; transform: translateX(-50%) rotate(90deg); }

.feat-card__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.feat-card__title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ink-deep);
}

.feat-card__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-2);
}

.feat-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: var(--s-3);
  border-top: 1px solid var(--divider);
}
.feat-card__list li {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-2);
  padding-left: 16px;
  position: relative;
}
.feat-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

/* ═══════════════════════════════════════════════════════════════
   EXPORT · 7 horizontal cards
   ═══════════════════════════════════════════════════════════════ */
.export {
  padding: clamp(80px, 10vw, 128px) 0;
  background: linear-gradient(to bottom, var(--workspace), #ECEBE6);
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}

.exp-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(14px, 1.5vw, 20px);
}
.exp-cards .exp-card:nth-child(4) {
  grid-row: span 2;
}
.exp-cards .exp-card:nth-child(n+5) {
  grid-column: span 1;
}

.exp-card {
  background: var(--card);
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 220px;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  position: relative;
  overflow: hidden;
}
.exp-card:hover {
  transform: translateY(-3px);
  border-color: var(--divider-strong);
  box-shadow: var(--shadow-card);
}

.exp-card--feat {
  background: #2E2E2A;
  color: var(--card);
  border-color: #2E2E2A;
  min-height: calc(440px + clamp(14px, 1.5vw, 20px));
}
.exp-card--feat .exp-card__title,
.exp-card--feat .exp-card__idx { color: var(--card); }
.exp-card--feat .exp-card__desc { color: rgba(250, 250, 249, 0.7); }
.exp-card--feat .exp-card__tag {
  background: rgba(255,255,255,0.08);
  color: rgba(250, 250, 249, 0.8);
  border-color: rgba(255,255,255,0.16);
}

.exp-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.exp-card__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.exp-card__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-2);
  background: var(--workspace);
  border: 1px solid var(--divider);
  padding: 3px 8px;
  border-radius: 999px;
}

.exp-card__title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink-deep);
  letter-spacing: -0.01em;
}
.exp-card__desc {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.65;
}

.exp-card__demo {
  margin-top: auto;
  padding-top: var(--s-4);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
}

/* exp demos */
.demo-doc {
  flex-direction: column;
  align-items: stretch;
  gap: 5px;
  width: 100%;
}
.demo-doc__line {
  height: 4px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.demo-doc__line--title { width: 50%; height: 7px; background: var(--accent); }
.demo-doc__line--short { width: 70%; }

.demo-pdf {
  position: relative;
  height: 80px;
}
.demo-pdf__page {
  position: absolute;
  width: 64px; height: 80px;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 3px;
  left: 50%;
  transform: translateX(-50%) rotate(-3deg);
  background-image:
    linear-gradient(transparent 14px, var(--divider) 14px, var(--divider) 15px, transparent 15px),
    linear-gradient(transparent 24px, var(--divider) 24px, var(--divider) 25px, transparent 25px),
    linear-gradient(transparent 34px, var(--divider) 34px, var(--divider) 35px, transparent 35px),
    linear-gradient(transparent 44px, var(--divider) 44px, var(--divider) 45px, transparent 45px);
}
.demo-pdf__page--back {
  transform: translateX(calc(-50% - 14px)) rotate(-9deg);
  opacity: 0.5;
  z-index: -1;
}

.demo-html {
  flex-direction: column;
  align-items: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
  gap: 4px;
  width: 100%;
}
.demo-html__tag { letter-spacing: 0.02em; }
.demo-html__tag--in { padding-left: 14px; color: var(--accent-deep); }

.demo-long {
  width: 100%;
  display: flex;
  justify-content: center;
}
.demo-long__sheet {
  width: 100%;
  height: 220px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 6px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}
.demo-long__sheet span {
  height: 5px;
  background: rgba(255,255,255,0.3);
  border-radius: 999px;
}
.demo-long__sheet span:nth-child(1) { width: 70%; height: 8px; background: rgba(255,255,255,0.7); }
.demo-long__sheet span:nth-child(2) { width: 100%; }
.demo-long__sheet span:nth-child(3) { width: 92%; }
.demo-long__sheet span:nth-child(4) { width: 60%; }

.demo-wx {
  display: flex;
  justify-content: center;
}
.demo-wx__phone {
  width: 80px; height: 96px;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 10px 10px 4px 4px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  box-shadow: 0 4px 12px rgba(74,74,68,0.08);
}
.demo-wx__phone::before {
  content: "";
  position: absolute;
  top: 4px; left: 50%;
  transform: translateX(-50%);
  width: 18px; height: 2px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.demo-wx__phone span {
  height: 4px;
  background: var(--divider-strong);
  border-radius: 999px;
}
.demo-wx__phone span:nth-child(1) { width: 60%; height: 6px; background: var(--accent); margin-top: 6px; }
.demo-wx__phone span:nth-child(2) { width: 100%; }
.demo-wx__phone span:nth-child(3) { width: 80%; }

.demo-xhs {
  gap: 6px;
}
.demo-xhs__card {
  width: 38px; height: 50px;
  background: var(--card);
  border: 1px solid var(--divider-strong);
  border-radius: 4px;
  display: inline-block;
  background-image:
    linear-gradient(transparent 8px, var(--divider) 8px, var(--divider) 9px, transparent 9px),
    linear-gradient(transparent 14px, var(--divider) 14px, var(--divider) 15px, transparent 15px),
    linear-gradient(transparent 20px, var(--divider) 20px, var(--divider) 21px, transparent 21px);
}
.demo-xhs__card:nth-child(2) { transform: translateY(-4px); }

.demo-text {
  flex-direction: column;
  align-items: stretch;
  gap: 5px;
  width: 100%;
}
.demo-text__line {
  height: 4px;
  background: var(--divider-strong);
  border-radius: 999px;
  width: 100%;
}
.demo-text__line:nth-of-type(2) { width: 78%; }
.demo-text__emoji {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mark);
  letter-spacing: 0.4em;
  text-align: left;
  padding: 4px 0;
}

/* ═══════════════════════════════════════════════════════════════
   EDITIONS · desktop vs web
   ═══════════════════════════════════════════════════════════════ */
.editions {
  padding: clamp(80px, 10vw, 128px) 0;
}

.ed-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 2.4vw, 32px);
}

.ed-card {
  background: var(--card);
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: clamp(36px, 4vw, 56px);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  position: relative;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.ed-card:hover {
  border-color: var(--divider-strong);
  box-shadow: var(--shadow-card);
}

.ed-card--desktop {
  background: #2E2E2A;
  border-color: #2E2E2A;
  color: var(--card);
}
.ed-card--desktop .ed-card__title { color: var(--card); }
.ed-card--desktop .ed-card__sub,
.ed-card--desktop .ed-card__foot { color: rgba(250, 250, 249, 0.55); }
.ed-card--desktop .ed-card__feats li { color: rgba(250, 250, 249, 0.85); }
.ed-card--desktop .ed-card__feats { border-color: rgba(255,255,255,0.1); }
.ed-card--desktop .tick { color: var(--ink-mark); }
.ed-card--desktop .meta-num,
.ed-card--desktop .meta-label { color: rgba(250, 250, 249, 0.5); }
.ed-card--desktop .btn--primary {
  background: var(--card);
  color: var(--ink-deep);
  border-color: var(--card);
}
.ed-card--desktop .btn--primary:hover {
  background: #ffffff;
  box-shadow: 0 6px 16px rgba(0,0,0,0.3);
}

.ed-card__corner {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ed-card__title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink-deep);
}
.ed-card__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.ed-card__feats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--s-4) 0;
  margin: var(--s-3) 0;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  flex: 1;
}
.ed-card__feats li {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--text-1);
  display: inline-flex;
  gap: 12px;
  align-items: flex-start;
}
.tick {
  color: var(--accent);
  font-size: 9px;
  line-height: 1.8;
  flex-shrink: 0;
}

.ed-card__foot {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-align: center;
  padding-top: 4px;
}

/* ═══════════════════════════════════════════════════════════════
   DOWNLOAD
   ═══════════════════════════════════════════════════════════════ */
.download {
  padding: clamp(80px, 10vw, 128px) 0 clamp(96px, 12vw, 144px);
  background: var(--card);
  border-top: 1px solid var(--divider);
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 24px);
  max-width: 1080px;
  margin: 0 auto;
}

.dl-card {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  background: var(--workspace);
  border: 1px solid var(--divider);
  border-radius: var(--r-lg);
  padding: 24px;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.dl-card:hover {
  transform: translateY(-2px);
  border-color: var(--divider-strong);
  box-shadow: var(--shadow-card);
}
.dl-card--primary {
  background: var(--ink-deep);
  border-color: var(--ink-deep);
  color: var(--card);
}
.dl-card--primary:hover {
  box-shadow: 0 12px 28px rgba(46, 46, 42, 0.28);
}
.dl-card--primary .dl-card__plat,
.dl-card--primary .dl-card__hint { color: rgba(250, 250, 249, 0.6); }
.dl-card--primary .dl-card__name { color: var(--card); }
.dl-card--soon {
  cursor: not-allowed;
  opacity: 0.7;
}

.dl-card__icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: rgba(0,0,0,0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-1);
  flex-shrink: 0;
}
.dl-card--primary .dl-card__icon {
  background: rgba(255,255,255,0.08);
  color: var(--card);
}

.dl-card__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}
.dl-card__plat {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-3);
}
.dl-card__name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink-deep);
}
.dl-card__hint {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-3);
}
.dl-card__cta {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-2);
  flex-shrink: 0;
}
.dl-card--primary .dl-card__cta { color: var(--card); }
.dl-card__cta--soon {
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.12em;
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════ */
.footer {
  background: var(--workspace);
  border-top: 1px solid var(--divider);
  padding-top: clamp(64px, 8vw, 96px);
}
.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 2fr;
  gap: clamp(40px, 6vw, 96px);
}

.footer__brand { display: flex; flex-direction: column; gap: var(--s-3); }
.footer__mark { color: var(--ink-deep); }
.footer__name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink-deep);
  letter-spacing: 0.02em;
}
.footer__name-en {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-left: 4px;
}
.footer__tag {
  font-size: 14px;
  color: var(--text-2);
  max-width: 280px;
  line-height: 1.7;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-7);
}
.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-3);
  margin-bottom: 8px;
}
.footer__col a {
  font-size: 14px;
  color: var(--text-1);
  transition: color 160ms ease;
}
.footer__col a:hover { color: var(--ink-deep); text-decoration: underline; text-underline-offset: 4px; }

.footer__base {
  max-width: var(--container);
  margin: 0 auto;
  margin-top: clamp(48px, 6vw, 80px);
  padding: 24px clamp(20px, 4vw, 48px);
  border-top: 1px solid var(--divider);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-3);
}
.footer__sep { color: var(--divider-strong); }

/* ═══════════════════════════════════════════════════════════════
   ENTRANCE ANIMATION (hero only — keep restrained)
   ═══════════════════════════════════════════════════════════════ */
.hero__copy > * {
  opacity: 0;
  transform: translateY(12px);
  animation: rise 700ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.hero__copy > *:nth-child(1) { animation-delay: 60ms; }
.hero__copy > *:nth-child(2) { animation-delay: 140ms; }
.hero__copy > *:nth-child(3) { animation-delay: 220ms; }
.hero__copy > *:nth-child(4) { animation-delay: 300ms; }
.hero__copy > *:nth-child(5) { animation-delay: 380ms; }
.mockup__frame {
  opacity: 0;
  animation: rise 900ms 280ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    transition-duration: 0s !important;
  }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1080px) {
  .exp-cards { grid-template-columns: repeat(3, 1fr); }
  .exp-cards .exp-card:nth-child(4) { grid-row: span 1; }
  .exp-card--feat { min-height: 220px; }
}

@media (max-width: 920px) {
  .hero__inner { grid-template-columns: 1fr; gap: var(--s-8); }
  .mockup { max-width: 640px; margin: 0 auto; width: 100%; }
  .feat-grid { grid-template-columns: 1fr; }
  .ed-grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .section__head--row { grid-template-columns: 1fr; }
  .nav__links { display: none; }
}

@media (max-width: 720px) {
  .exp-cards { grid-template-columns: repeat(2, 1fr); }
  .dl-grid { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
  .nav__cta .btn--ghost { display: none; }
  .hero__title { font-size: 44px; }
}

@media (max-width: 480px) {
  .exp-cards { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr; }
}