/* ==========================================================================
   Native77 — Landing page
   Hokusai / ukiyo-e inspired, minimal editorial system
   ========================================================================== */

:root {
  --washi: #F3EEE2;
  --paper: #FBF8F1;
  --sumi: #1C1F26;
  --prussian: #1E3A5F;
  --indigo: #0F2440;
  --mist: #8A8F98;
  --hairline: #D9D1BF;
  --vermilion: #C8402F;
  --vermilion-dark: #A6331F;
  --sky: #F1E9D6;            /* matches the dawn sky in voyage.webp */

  --ink-soft: #3A3F4A;
  --on-dark: #EDE7D9;
  --on-dark-soft: #A9B3C2;
  --hairline-dark: rgba(237, 231, 217, 0.18);

  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", monospace, "Noto Sans TC", sans-serif;

  --gutter: 20px;
  --label-col: 0px;
  --max: 1320px;
  --header-h: 60px;
  --section-y: 88px;
  --radius: 2px;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

@media (min-width: 768px) {
  :root { --gutter: 40px; --section-y: 120px; --header-h: 68px; }
}
@media (min-width: 1100px) {
  :root { --gutter: 56px; --label-col: 72px; --section-y: 152px; }
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background-color: var(--washi);
  /* faint paper grain */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .11 0 0 0 0 .12 0 0 0 0 .15 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  color: var(--sumi);
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.02em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 768px) { body { font-size: 18px; } }

img { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
p, h1, h2, h3, ul, ol, dl, dd, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }

::selection { background: var(--prussian); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 12px; top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--sumi);
  color: var(--paper);
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

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

/* ---------- Type ---------- */

/* CJK display lines: each intended line is a <span class="line"> that only
   wraps as a whole unit, and phrases never split mid-word. */
.hero-title,
.h2,
.h3,
.pull-quote p,
.closing-line,
.band-line,
.after-title {
  word-break: keep-all;
  line-break: strict;
  text-wrap: balance;
}
.line { display: inline-block; }

/* Headings shrink to fit their column: --fit is the em-width of the longest
   line (letter-spacing included), measured against the parent container. */
.hero-text,
.wave-text,
.pain-intro,
.bridge-text,
.how-content,
.stories-head,
.trust-head,
.faq-head,
.signup-text,
.band-inner { container-type: inline-size; }

.h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.85rem, 1.2rem + 2.6vw, 3.25rem);
  font-size: min(clamp(1.85rem, 1.2rem + 2.6vw, 3.25rem), 100cqi / var(--fit, 0.01));
  line-height: 1.38;
  letter-spacing: 0.03em;
  color: var(--sumi);
}
#wave-title     { --fit: 11.6; }  /* 客戶不再一頁一頁地逛， */
#pain-title     { --fit: 8; }     /* 但 AI 看不見它。 */
#solution-title { --fit: 9.5; }   /* 也不用養工程團隊。 */
#how-title      { --fit: 9.5; }   /* 從一份 Excel 開始， */
#stories-title  { --fit: 10.9; }  /* 當客戶把需求交給 AI， */
#trust-title    { --fit: 7.5; }   /* 永遠由你作主。 */
#signup-title   { --fit: 8.5; }   /* 在浪潮抵達之前， */
.h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 1.1rem + 1vw, 1.85rem);
  line-height: 1.5;
  letter-spacing: 0.03em;
}

.kicker {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--prussian);
  text-transform: uppercase;
}
.kicker-ink { color: var(--mist); }

.story {
  color: var(--ink-soft);
  max-width: 34em;
}

.small-note {
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- Seal (落款) ---------- */
.seal {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0;
  line-height: 1;
  border-radius: 1px;
  box-shadow: inset 0 0 0 1.5px rgba(251, 248, 241, 0.35);
}
.seal-sm {
  width: 18px; height: 18px; font-size: 9px;
  margin-right: 10px;
  vertical-align: 2px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--vermilion);
  color: var(--paper);
}
.btn-primary:hover { background: var(--vermilion-dark); }
.btn-secondary {
  background: transparent;
  border-color: var(--prussian);
  color: var(--prussian);
}
.btn-secondary:hover { background: var(--prussian); color: var(--paper); }
.btn-sm {
  min-height: 44px;
  padding: 0 18px;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
}
.btn-block { width: 100%; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.cta-row-center { justify-content: center; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--washi);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--hairline); }

.header-inner {
  max-width: calc(var(--max) + var(--gutter) * 2);
  margin: 0 auto;
  height: var(--header-h);
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  text-decoration: none;
  color: var(--sumi);
}
.logo-word {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
}

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; gap: 4px; }
.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--ink-soft);
  position: relative;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 10px;
  height: 1px;
  background: var(--vermilion);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.site-nav a:hover { color: var(--sumi); }
.site-nav a:hover::after,
.site-nav a.is-active::after { transform: scaleX(1); }
.site-nav a.is-active { color: var(--sumi); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav-toggle-bars,
.nav-toggle-bars::before {
  position: absolute;
  left: 12px; right: 12px;
  height: 1.5px;
  background: var(--sumi);
  transition: transform .3s var(--ease);
}
.nav-toggle-bars { top: 18px; }
.nav-toggle-bars::before { content: ""; left: 0; right: 0; top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(-7px) rotate(-90deg); }

@media (max-width: 959px) {
  .header-inner { gap: 12px; }
  .header-actions { margin-left: auto; }
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    margin: 0;
    background: var(--washi);
    border-bottom: 1px solid var(--hairline);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px var(--gutter) 20px;
  }
  .site-nav li + li { border-top: 1px solid var(--hairline); }
  .site-nav a { display: flex; padding: 0; min-height: 52px; font-size: 1rem; }
  .site-nav a::after { display: none; }
}
@media (max-width: 380px) {
  .header-actions .btn-sm { padding: 0 14px; letter-spacing: 0.04em; }
  .logo-word { font-size: 1.08rem; }
}

/* ==========================================================================
   Shared section scaffolding
   ========================================================================== */
.chapter,
.pain-body {
  position: relative;
  max-width: calc(var(--max) + var(--gutter) * 2 + var(--label-col));
  margin: 0 auto;
  padding: var(--section-y) var(--gutter);
  padding-left: calc(var(--gutter) + var(--label-col));
}

/* Chapter label: horizontal on mobile, vertical scroll label on desktop */
.chapter-label {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 36px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.24em;
  color: var(--prussian);
}
.chapter-label span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--vermilion);
}
.chapter-label span::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--vermilion);
}

@media (min-width: 1100px) {
  .chapter-label {
    position: absolute;
    top: var(--section-y);
    left: var(--gutter);
    margin: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 0.95rem;
    letter-spacing: 0.32em;
    padding-left: 18px;
    border-left: 1px solid var(--hairline);
    min-height: 220px;
  }
  .chapter-label span { gap: 14px; }
}

/* Dark (indigo) sections */
.dark {
  background: var(--indigo);
  color: var(--on-dark);
}
.dark .h2, .dark .h3 { color: var(--paper); }
.dark .story { color: var(--on-dark-soft); }
.dark .chapter-label { color: var(--on-dark); border-color: var(--hairline-dark); }
.dark .small-note { color: var(--on-dark-soft); }

/* Seigaiha (青海波) — very faint wave pattern */
.seigaiha { position: relative; isolation: isolate; }
.seigaiha::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' width='80' height='40' viewBox='0 0 80 40'%3E%3Cdefs%3E%3Cg id='w'%3E%3Ccircle r='20' fill='%230F2440'/%3E%3Ccircle r='20'/%3E%3Ccircle r='15'/%3E%3Ccircle r='10'/%3E%3Ccircle r='5'/%3E%3C/g%3E%3C/defs%3E%3Cg fill='none' stroke='%23F3EEE2' stroke-width='1'%3E%3Cuse xlink:href='%23w' x='0' y='0'/%3E%3Cuse xlink:href='%23w' x='40' y='0'/%3E%3Cuse xlink:href='%23w' x='80' y='0'/%3E%3Cuse xlink:href='%23w' x='20' y='20'/%3E%3Cuse xlink:href='%23w' x='60' y='20'/%3E%3Cuse xlink:href='%23w' x='0' y='40'/%3E%3Cuse xlink:href='%23w' x='40' y='40'/%3E%3Cuse xlink:href='%23w' x='80' y='40'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 80px 40px;
  /* fade the pattern toward the top so text stays calm */
  -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0,0,0,.55) 45%, transparent 85%);
          mask-image: linear-gradient(to top, #000 0%, rgba(0,0,0,.55) 45%, transparent 85%);
}

/* Image frames */
.framed img,
.wave-figure img,
.bridge-figure img,
.how-figure img,
.story-figure img {
  border-radius: var(--radius);
  outline: 1px solid var(--hairline);
  outline-offset: -1px;
}

/* ==========================================================================
   1. Hero
   ========================================================================== */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  max-width: calc(var(--max) + var(--gutter) * 2 + var(--label-col));
  margin: 0 auto;
  padding: 40px 0 0;
}
.hero-text {
  padding: 0 var(--gutter);
  position: relative;
  z-index: 1;
}
.hero-text .kicker { margin-bottom: 28px; }
.hero-title {
  font-family: var(--serif);
  font-weight: 700;
  /* "生意的入口，" = 6 glyphs ≈ 6.24em incl. letter-spacing; 375px → ~42px */
  --fit: 6.5;
  font-size: clamp(2.4rem, 1.2rem + 6vw, 4.6rem);
  font-size: min(clamp(2.4rem, 1.2rem + 6vw, 4.6rem), 100cqi / var(--fit));
  line-height: 1.22;
  letter-spacing: 0.04em;
  color: var(--sumi);
  margin-bottom: 32px;
}
.lead {
  font-size: 1.02rem;
  line-height: 2;
  color: var(--ink-soft);
  margin-bottom: 36px;
  max-width: 32em;
}
.cta-note {
  margin-top: 20px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.hero-figure {
  margin-top: 48px;
}
.hero-figure img {
  width: 100%;
  height: auto;
}

@media (max-width: 479px) {
  .lead br { display: none; }
  .hero .cta-row .btn { flex: 1 1 100%; }
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    min-height: calc(100svh - var(--header-h));
    max-height: 980px;
    padding: 0;
  }
  .hero-text {
    padding: 56px 0 56px calc(var(--gutter) + var(--label-col));
    margin-right: -3vw;  /* let the headline drift over the sky of the print */
  }
  /* text column ≈ 0.45vw − padding: 1100px → ~363px, 1440px → ~515px */
  .hero-title {
    font-size: clamp(3.2rem, 0.2rem + 4.5vw, 4.8rem);
    font-size: min(clamp(3.2rem, 0.2rem + 4.5vw, 4.8rem), 100cqi / var(--fit));
  }
  .hero-figure {
    margin: 0;
    align-self: stretch;
    display: flex;
    align-items: center;
  }
  .hero-figure img {
    width: 100%;
    max-height: calc(100svh - var(--header-h) - 24px);
    object-fit: cover;
    object-position: 30% 50%;
  }
}
@media (min-width: 1440px) {
  .hero-figure img { object-position: center; }
}

/* ==========================================================================
   2. 第一幕｜浪潮
   ========================================================================== */
.wave-split {
  display: grid;
  gap: 40px;
}
.wave-text .h2 { margin-bottom: 28px; }

@media (min-width: 960px) {
  .wave-split {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0 32px;
    align-items: end;
  }
  .wave-figure {
    grid-column: 1 / span 7;
  }
  .wave-text {
    grid-column: 8 / span 5;
    padding-bottom: 8px;
  }
}

/* 昨日 / 今日 */
.then-now {
  margin-top: 72px;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--hairline);
}
.then-now-col { padding: 28px 0; }
.then-now-col + .then-now-col { border-top: 1px solid var(--hairline); }
.then-now-head {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  margin-bottom: 18px;
  color: var(--mist);
}
.is-now .then-now-head { color: var(--prussian); }

.flow-list { counter-reset: step; }
.flow-list li {
  counter-increment: step;
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 8px 0;
  color: var(--mist);
}
.flow-list li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  flex: 0 0 auto;
  width: 22px;
}
.flow-list li + li::after {
  /* thin arrow between steps */
  content: "";
  position: absolute;
  left: 9px;
  top: -6px;
  width: 1px;
  height: 10px;
  background: var(--hairline);
}
.is-now .flow-list li { color: var(--sumi); }
.is-now .flow-list li::before { color: var(--vermilion); }
.is-now .flow-list .muted { font-size: 0.88em; }

@media (min-width: 768px) {
  .then-now {
    grid-template-columns: 1fr 1fr;
  }
  .then-now-col { padding: 36px 48px 36px 0; }
  .then-now-col + .then-now-col {
    border-top: 0;
    border-left: 1px solid var(--hairline);
    padding-left: 48px;
  }
}
@media (min-width: 960px) {
  .then-now { margin-left: 25%; margin-top: 104px; }
}

/* Pull quote */
.pull-quote {
  margin-top: 88px;
  position: relative;
  padding-top: 40px;
}
.pull-quote::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 48px; height: 1px;
  background: var(--vermilion);
}
.pull-quote p {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.4rem, 0.9rem + 2.2vw, 2.5rem);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--prussian);
  max-width: 24em;
}
@media (min-width: 960px) {
  .pull-quote { margin-top: 136px; width: 80%; }
}

/* ==========================================================================
   3. 第二幕｜看不見的店
   ========================================================================== */
.chapter-pain {
  max-width: none;
  padding: 0;
  background: var(--paper);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.bleed-figure {
  max-width: 1600px;
  margin: 0 auto;
}
.bleed-figure img {
  width: 100%;
  aspect-ratio: 1376 / 768;
  object-fit: cover;
}
.bleed-figure figcaption {
  max-width: calc(var(--max) + var(--gutter) * 2 + var(--label-col));
  margin: 0 auto;
  padding: 14px var(--gutter) 0;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-align: right;
}
@media (min-width: 1100px) {
  .bleed-figure img { aspect-ratio: 21 / 9; object-position: 50% 55%; }
}

.pain-intro .h2 { margin-bottom: 28px; }

.pain-list {
  margin-top: 64px;
  border-top: 1px solid var(--hairline);
}
.pain-list li {
  display: grid;
  grid-template-columns: 3.2em 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 26px 0;
  border-bottom: 1px solid var(--hairline);
}
.pain-num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--prussian);
  letter-spacing: 0;
}
.pain-list strong {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--sumi);
  margin-right: 0.2em;
}
.pain-list p { color: var(--ink-soft); }

.closing-line {
  margin-top: 64px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.2rem, 0.95rem + 1.1vw, 1.65rem);
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--sumi);
  padding-left: 20px;
  border-left: 2px solid var(--vermilion);
}

@media (min-width: 960px) {
  .pain-body {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0 32px;
  }
  .pain-intro { grid-column: 1 / span 6; }
  .pain-list { grid-column: 8 / span 5; margin-top: 8px; align-self: start; }
  .closing-line { grid-column: 3 / span 9; margin-top: 104px; }
}

/* ==========================================================================
   4. 第三幕｜架一座橋 (dark)
   ========================================================================== */
.chapter-bridge {
  max-width: none;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.chapter-bridge > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 1100px) {
  .chapter-bridge {
    padding-left: calc(var(--gutter) + var(--label-col));
  }
  .chapter-bridge .chapter-label {
    left: max(var(--gutter), calc((100vw - var(--max) - var(--label-col)) / 2 - 8px));
  }
}

.bridge-head {
  display: grid;
  gap: 48px;
}
.bridge-text .h2 { margin-bottom: 28px; }
.bridge-figure img {
  outline-color: var(--hairline-dark);
}
@media (min-width: 960px) {
  .bridge-head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 64px;
    align-items: center;
  }
  .bridge-figure { margin-right: calc(-1 * var(--gutter)); }
}

/* Flow diagram */
.flow {
  margin-top: 96px;
  display: grid;
  grid-template-columns: 1fr;
  align-items: stretch;
}
.flow-node {
  padding: 24px 24px 26px;
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius);
}
.flow-node.is-core {
  background: var(--paper);
  color: var(--sumi);
  border-color: var(--paper);
}
.flow-kicker {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  color: var(--paper);
}
.is-core .flow-kicker { color: var(--prussian); font-size: 1.25rem; }
.flow-body {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--on-dark-soft);
}
.is-core .flow-body { color: var(--ink-soft); }

.mono-tags {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.mono-tags li {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  line-height: 1;
  padding: 6px 8px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  color: var(--prussian);
}

.flow-arrow {
  position: relative;
  display: block;
  height: 44px;
}
.flow-arrow::before {
  content: "";
  position: absolute;
  left: 50%; top: 6px; bottom: 8px;
  width: 1px;
  background: var(--on-dark-soft);
}
.flow-arrow::after {
  content: "";
  position: absolute;
  left: calc(50% - 4px); bottom: 8px;
  width: 7px; height: 7px;
  border-right: 1px solid var(--on-dark-soft);
  border-bottom: 1px solid var(--on-dark-soft);
  transform: rotate(45deg);
}

@media (min-width: 960px) {
  .flow {
    grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1.35fr) 72px minmax(0, 1fr);
    align-items: center;
  }
  .flow-node { padding: 30px 28px 32px; }
  .flow-node.is-core { padding: 36px 32px; }
  .flow-arrow { height: 1px; }
  .flow-arrow::before {
    left: 10px; right: 12px; top: 0; bottom: auto;
    width: auto; height: 1px;
  }
  .flow-arrow::after {
    left: auto; right: 12px; top: -3.5px; bottom: auto;
    transform: rotate(-45deg);
  }
}

/* Capabilities — editorial list, two columns */
.capabilities {
  margin-top: 104px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 56px;
}
.cap {
  padding: 26px 0 28px;
  border-top: 1px solid var(--hairline-dark);
}
.cap dt {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.cap dt::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--vermilion);
  flex: 0 0 auto;
}
.cap dd {
  color: var(--on-dark-soft);
  font-size: 0.98rem;
  padding-left: 18px;
}
@media (min-width: 768px) {
  .capabilities { grid-template-columns: 1fr 1fr; }
  /* stagger the right column for an asymmetric rhythm */
  .cap:nth-child(even) { transform: translateY(48px); }
  .capabilities { padding-bottom: 48px; }
}
@media (min-width: 1100px) {
  .capabilities { padding-left: 16.66%; }
}

.tagline {
  margin-top: 96px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.1rem, 0.9rem + 1vw, 1.5rem);
  letter-spacing: 0.12em;
  color: var(--paper);
  text-align: right;
}

/* ==========================================================================
   5. 四步導入
   ========================================================================== */
.how-grid {
  display: grid;
  gap: 48px;
}
.how-content .h2 { margin-bottom: 48px; }

.timeline {
  position: relative;
  margin-bottom: 40px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 12px; bottom: 12px;
  width: 1px;
  background: var(--hairline);
}
.step {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 0 0 40px;
}
.step:last-child { padding-bottom: 0; }
.step-num {
  position: relative;
  display: grid;
  place-items: center;
  width: 48px; height: 48px;
  background: var(--washi);
  border: 1px solid var(--hairline);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--prussian);
}
.step-num::after {
  content: "";
  position: absolute;
  top: 2px; right: 2px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--vermilion);
}
.step-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.06em;
  margin: 6px 0 6px;
}
.step p { color: var(--ink-soft); }

@media (min-width: 960px) {
  .how-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 80px;
    align-items: start;
  }
  .how-media {
    position: sticky;
    top: calc(var(--header-h) + 40px);
  }
  .how-figure img {
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: 66% 50%;   /* keep the lantern spirit and the owner's seal */
  }
  .how-content { padding-top: 24px; }
}

/* ==========================================================================
   6. 使用情境
   ========================================================================== */
.stories-head { margin-bottom: 72px; }
@media (min-width: 960px) {
  .stories-head { margin-left: 33%; margin-bottom: 112px; }
}

.story-block {
  display: grid;
  gap: 32px;
  margin-bottom: 96px;
}
.story-text p { color: var(--ink-soft); }
.story-text .h3 { margin-bottom: 18px; }
.story-index {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: var(--vermilion);
  margin-bottom: 12px;
}
.tag {
  display: inline-block;
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--prussian) !important;
}

@media (min-width: 960px) {
  .story-block {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0 32px;
    align-items: center;
    margin-bottom: 144px;
  }
  .story-figure { grid-column: 1 / span 8; }
  .story-text { grid-column: 9 / span 4; }
  .story-block.is-flipped .story-figure { grid-column: 5 / span 8; grid-row: 1; }
  .story-block.is-flipped .story-text { grid-column: 1 / span 4; grid-row: 1; }
  .story-block:not(.is-flipped) .story-figure {
    margin-left: calc(-1 * var(--label-col) * 0.5);
  }
  .story-block.is-flipped .story-figure { margin-right: calc(-1 * var(--gutter) * 0.5); }
}

.story-text-only {
  margin-bottom: 0;
  padding: 56px 28px 64px;
  border-radius: var(--radius);
}
.story-text-only .story-text p { color: var(--on-dark-soft); }
.story-text-only .story-text .small-note { margin-top: 18px; }
.story-text-only .tag {
  border-top-color: var(--hairline-dark);
  color: var(--on-dark) !important;
}
@media (min-width: 960px) {
  .story-text-only {
    display: block;
    margin-left: 25%;
    padding: 96px 8% 104px;
  }
  .story-text-only .story-text { max-width: 36em; }
}

/* ==========================================================================
   7. 信任
   ========================================================================== */
.chapter-trust { border-top: 1px solid var(--hairline); }
.trust-grid { display: grid; gap: 56px; }

.principles {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--hairline);
}
.principle {
  padding: 28px 0 32px;
  border-bottom: 1px solid var(--hairline);
}
.principle dt {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.principle dd { color: var(--ink-soft); font-size: 0.98rem; }

@media (min-width: 768px) {
  .principles { grid-template-columns: 1fr 1fr; }
  .principle { padding: 36px 40px 40px 0; }
  .principle:nth-child(even) {
    padding-left: 40px;
    padding-right: 0;
    border-left: 1px solid var(--hairline);
  }
}
@media (min-width: 960px) {
  .trust-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 80px;
    align-items: start;
  }
  .trust-head { position: sticky; top: 120px; align-self: start; }
}

/* ==========================================================================
   8. Band
   ========================================================================== */
.band {
  background: var(--prussian);
  color: var(--paper);
}
.band-inner {
  max-width: calc(var(--max) + var(--gutter) * 2 + var(--label-col));
  margin: 0 auto;
  padding: 96px var(--gutter);
  padding-left: calc(var(--gutter) + var(--label-col));
}
.band-line {
  font-family: var(--serif);
  font-weight: 700;
  --fit: 15.8;  /* Native77 不是另一個購物平台， */
  font-size: clamp(1.6rem, 1rem + 2.8vw, 3rem);
  font-size: min(clamp(1.6rem, 1rem + 2.8vw, 3rem), 100cqi / var(--fit));
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.band-sub {
  max-width: 34em;
  color: #C9D3E0;
}
@media (min-width: 960px) {
  .band-inner { padding-top: 128px; padding-bottom: 128px; }
  .band-sub { margin-left: 40%; }
}

/* ==========================================================================
   9. FAQ
   ========================================================================== */
.faq-grid { display: grid; gap: 40px; }
.faq-head .kicker { margin-bottom: 14px; }

.faq-list { border-top: 1px solid var(--hairline); }
.faq-list details { border-bottom: 1px solid var(--hairline); }
.faq-list summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72px;
  padding: 18px 48px 18px 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.12rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before,
.faq-list summary::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--prussian);
  transition: transform .3s var(--ease);
}
.faq-list summary::after { transform: rotate(90deg); }
.faq-list details[open] summary::after { transform: rotate(0deg); }
.faq-list summary:hover { color: var(--prussian); }
.faq-list details p {
  padding: 0 48px 28px 0;
  color: var(--ink-soft);
  max-width: 40em;
}

@media (min-width: 960px) {
  .faq-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 80px;
    align-items: start;
  }
  .faq-head { position: sticky; top: 120px; align-self: start; }
}

/* ==========================================================================
   10. Final CTA
   ========================================================================== */
.signup {
  background: var(--sky);
  position: relative;
}
.signup-sky {
  position: relative;
  z-index: 1;
  padding: 96px var(--gutter) 24px;
  text-align: center;
}
.signup-text {
  max-width: 760px;
  margin: 0 auto;
}
.signup-title { margin-bottom: 22px; }
.signup-sub {
  color: var(--ink-soft);
  max-width: 30em;
  margin: 0 auto 36px;
}

.signup-figure {
  /* the print's sky dissolves into the section background */
  margin-top: -24px;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 22%);
          mask-image: linear-gradient(to bottom, transparent 0%, #000 22%);
}
.signup-figure img {
  width: 100%;
  aspect-ratio: 1376 / 768;
  object-fit: cover;
}
@media (min-width: 1100px) {
  .signup-sky { padding-top: 136px; }
  .signup-figure { margin-top: -120px; }
  .signup-figure img { aspect-ratio: 16 / 7; object-position: 50% 70%; }
}

.signup-form-wrap {
  display: flow-root;   /* stop the form's negative margin collapsing into the wrap */
  background: var(--indigo);
  padding: 0 var(--gutter) 96px;
}
.signup-form {
  position: relative;
  max-width: 560px;
  margin: -40px auto 0;
  background: var(--paper);
  padding: 32px 22px 28px;
  border-radius: var(--radius);
  box-shadow: 0 0 0 1px var(--hairline), 0 24px 60px -30px rgba(15, 36, 64, .55);
}
@media (min-width: 768px) {
  .signup-form { padding: 44px 44px 40px; margin-top: -120px; }
}
@media (min-width: 1100px) {
  .signup-form-wrap { padding-bottom: 128px; }
  .signup-form { margin-top: -200px; }
}

/* 申請之後 — fills the indigo half beside the form on desktop */
.signup-after {
  max-width: 560px;
  margin: 64px auto 0;
  color: var(--on-dark);
}
.after-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--on-dark-soft);
}
.after-label::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--vermilion);
}
.after-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 1rem + 1.2vw, 2rem);
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--paper);
  margin-bottom: 32px;
}
.after-steps { border-top: 1px solid var(--hairline-dark); }
.after-steps li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline-dark);
  color: var(--on-dark);
}
.after-num {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border: 1px solid var(--hairline-dark);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--paper);
}
.after-note {
  margin-top: 24px;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

@media (min-width: 1200px) {
  .signup-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 560px;
    gap: 0 80px;
    align-items: start;
    max-width: calc(var(--max) + var(--label-col));
    margin: 0 auto;
    padding-left: var(--label-col);
  }
  .signup-form { grid-column: 2; grid-row: 1; margin: -200px 0 0; max-width: none; }
  .signup-after { grid-column: 1; grid-row: 1; max-width: 36em; margin: 0; padding-top: 88px; }
}

.form-kicker {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hairline);
}

.field {
  margin: 0 0 20px;
  padding: 0;
  border: 0;
  min-width: 0;
}
.field label,
.field legend {
  display: block;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-bottom: 6px;
  padding: 0;
}
.field-row { display: grid; gap: 0 16px; }
@media (min-width: 560px) { .field-row { grid-template-columns: 1fr 1fr; } }

.field input[type="text"],
.field input[type="email"],
.field select {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  background: var(--washi);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-size: 1rem;
  letter-spacing: 0.02em;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
  -webkit-appearance: none;
          appearance: none;
}
.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--prussian);
  background: var(--paper);
  box-shadow: 0 0 0 1px var(--prussian);
}
.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: 18px; top: 50%;
  width: 7px; height: 7px;
  border-right: 1px solid var(--sumi);
  border-bottom: 1px solid var(--sumi);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
.field select { padding-right: 44px; cursor: pointer; }

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.check {
  position: relative;
  display: inline-flex;
  cursor: pointer;
}
.check input {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
}
.check span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px 0 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--washi);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.check span::before {
  content: "";
  width: 12px; height: 12px;
  border: 1px solid var(--mist);
  border-radius: 1px;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}
.check input:checked + span {
  border-color: var(--prussian);
  background: var(--paper);
}
.check input:checked + span::before {
  background: var(--vermilion);
  border-color: var(--vermilion);
}
.check input:focus-visible + span {
  outline: 2px solid var(--vermilion);
  outline-offset: 2px;
}

.signup-form .btn-block { margin-top: 8px; }

.form-message {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 2px solid var(--vermilion);
  background: var(--washi);
  font-size: 0.95rem;
  line-height: 1.75;
}
.form-message[hidden] { display: none; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--indigo);
  color: var(--on-dark-soft);
  border-top: 1px solid var(--hairline-dark);
}
.footer-inner {
  max-width: calc(var(--max) + var(--gutter) * 2 + var(--label-col));
  margin: 0 auto;
  padding: 56px var(--gutter) 48px;
  padding-left: calc(var(--gutter) + var(--label-col));
  display: grid;
  gap: 28px;
  font-size: 0.88rem;
}
.site-footer .logo { color: var(--paper); }
.footer-brand p { margin-top: 6px; letter-spacing: 0.08em; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0 24px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
  letter-spacing: 0.1em;
}
.footer-links a:hover { color: var(--paper); }
.footer-credit { margin-top: 4px; font-size: 0.8rem; opacity: .8; }

@media (min-width: 960px) {
  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    align-items: start;
  }
  .footer-meta { text-align: right; }
}

/* ==========================================================================
   Reveal on scroll
   ========================================================================== */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js .reveal,
  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn, .site-nav a::after, .faq-list summary::after { transition: none; }
}