:root {
  --color-ink: #0f172a;
  --color-muted: #475569;
  --color-border: #cbd5e1;
  --color-surface: #f8fafc;
  --color-panel: #ffffff;
  --color-brand: #0369a1;
  --color-brand-dark: #075985;
  --color-brand-soft: #e0f2fe;
  --color-line: #06c755;
  --color-line-dark: #034b21;
  --color-gold: #ca8a04;
  --color-success: #15803d;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --font-heading: "Noto Serif TC", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --shadow-soft: 0 18px 60px rgba(15, 23, 42, 0.12);
  --max-width: 1120px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(203, 213, 225, 0.24) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(180deg, #ffffff 0%, var(--color-surface) 34%, #eef6fb 100%);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.625;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(3, 105, 161, 0.45);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100;
  transform: translateY(-120px);
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 16px;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.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;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid transparent;
  background: rgba(248, 250, 252, 0.84);
  backdrop-filter: blur(18px);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.site-header.is-scrolled {
  border-color: rgba(203, 213, 225, 0.88);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
}

.header-inner,
.section-inner {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  color: var(--color-ink);
  font-weight: 900;
  white-space: nowrap;
}

.wordmark-logo {
  display: block;
  width: clamp(150px, 17vw, 210px);
  height: auto;
}

.wordmark-mark {
  display: block;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
}

.wordmark-mark img {
  display: block;
  width: 100%;
  height: 100%;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.desktop-nav a,
.mobile-nav a {
  border-radius: 999px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
  padding: 9px 13px;
  transition: background 160ms ease, color 160ms ease;
}

.desktop-nav a:hover,
.desktop-nav a.is-active,
.mobile-nav a:hover {
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--color-border);
  padding: 8px 16px 16px;
}

.mobile-nav a {
  display: block;
  margin-top: 4px;
}

.button,
.icon-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.2;
  padding: 12px 18px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover,
.icon-button:hover {
  transform: translateY(-1px);
}

.button:active,
.icon-button:active {
  transform: translateY(0);
}

.button-large {
  min-height: 50px;
  padding-inline: 22px;
}

.button-line {
  background: var(--color-line);
  color: #052e16;
  box-shadow: 0 10px 24px rgba(6, 199, 85, 0.22);
}

.button-line:hover {
  box-shadow: 0 14px 30px rgba(6, 199, 85, 0.28);
}

.button-secondary {
  border-color: rgba(3, 105, 161, 0.4);
  background: #fff;
  color: var(--color-brand-dark);
}

.button-brand {
  background: var(--color-brand);
  color: #fff;
}

.button-ghost {
  border-color: var(--color-border);
  background: #fff;
  color: var(--color-brand-dark);
}

.icon-button {
  width: 44px;
  padding: 0;
  background: #fff;
  border-color: var(--color-border);
}

.menu-toggle {
  display: none;
}

.menu-toggle span[aria-hidden="true"],
.menu-toggle span[aria-hidden="true"]::before,
.menu-toggle span[aria-hidden="true"]::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-ink);
  content: "";
}

.menu-toggle span[aria-hidden="true"]::before {
  transform: translateY(-6px);
}

.menu-toggle span[aria-hidden="true"]::after {
  transform: translateY(4px);
}

.section {
  padding: 88px 0;
}

.hero {
  padding-top: 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--color-brand-dark);
  font-size: 13px;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2 {
  margin: 0;
  font-family: var(--font-heading);
  line-height: 1.2;
}

h1 {
  max-width: 760px;
  font-size: 56px;
}

h2 {
  font-size: 40px;
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.45;
}

.hero-lead,
.section-lead {
  color: var(--color-muted);
  font-size: 18px;
  line-height: 1.75;
}

.hero-lead {
  max-width: 640px;
  margin: 22px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.launch-note {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 620px;
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
}

.launch-note span {
  color: var(--color-brand-dark);
  font-weight: 900;
}

.hero-preview {
  position: relative;
}

.hero-preview.launch-illustration {
  margin: 0;
}

.hero-preview::before {
  position: absolute;
  inset: 28px -10px -18px 22px;
  z-index: -1;
  border: 1px solid rgba(3, 105, 161, 0.22);
  background: rgba(224, 242, 254, 0.58);
  content: "";
}

.launch-illustration img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(148, 163, 184, 0.55);
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
}

.chat-panel,
.phone-demo,
.material-card,
.review-grid article,
.review-steps li,
.quality-panel,
.signup-panel,
.disclaimer,
.accordion details {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-panel);
}

.chat-panel {
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
  background: #f8fafc;
  padding: 16px;
}

.chat-avatar {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--color-brand);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 900;
}

.chat-header strong,
.chat-header span {
  display: block;
}

.chat-header span {
  color: var(--color-muted);
  font-size: 13px;
}

.chat-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
}

.bubble {
  max-width: 86%;
  margin: 0;
  border-radius: 16px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
}

.bubble-user {
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  background: var(--color-line);
  color: #052e16;
  font-weight: 700;
}

.bubble-bot {
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  background: #eef2f7;
  color: var(--color-ink);
}

.bubble-short {
  min-width: 72px;
  text-align: center;
}

.viewer-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 4px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  padding: 16px;
}

.viewer-card h2 {
  margin: 8px 0 4px;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.45;
}

.viewer-card p {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.viewer-card a,
.text-link {
  color: var(--color-brand-dark);
  font-weight: 900;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  line-height: 1.2;
  padding: 6px 10px;
}

.badge-review {
  background: #fef3c7;
  color: #854d0e;
}

.badge-draft {
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
}

.badge-published {
  background: #dcfce7;
  color: #166534;
}

.split-section,
.review-layout,
.line-demo,
.faq-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.reason-grid,
.benefit-grid {
  display: grid;
  gap: 24px;
}

.reason-grid article {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

.benefit-grid {
  grid-template-columns: repeat(4, 1fr);
}

.benefit-grid article {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-panel);
  padding: 20px;
}

.reason-grid p,
.benefit-grid p,
.review-grid p,
.material-card p,
.quality-panel p,
.disclaimer p,
.accordion p {
  margin: 0;
  color: var(--color-muted);
}

.section-muted {
  border-block: 1px solid rgba(203, 213, 225, 0.7);
  background: rgba(241, 245, 249, 0.68);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-heading-row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.workflow-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: workflow;
}

.workflow-list li {
  display: flex;
  gap: 14px;
  min-height: 160px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  padding: 18px;
}

.workflow-list span {
  display: grid;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 999px;
  background: var(--color-brand);
  color: #fff;
  font-weight: 900;
}

.workflow-list p {
  margin: 0;
  color: var(--color-muted);
}

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

.material-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 20px;
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.material-card h3 {
  margin-top: 18px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
}

.chip-row span {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: #f8fafc;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 9px;
}

.meta-list {
  display: grid;
  gap: 8px;
  margin: auto 0 20px;
}

.meta-list div {
  min-width: 0;
}

.meta-list dt {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 900;
}

.meta-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.review-layout {
  align-items: center;
}

.review-visual {
  max-width: 520px;
  margin: 0;
  justify-self: end;
}

.review-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(148, 163, 184, 0.55);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.review-grid article {
  padding: 18px;
}

.review-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.review-steps li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 72px;
  color: var(--color-ink);
  font-weight: 900;
  padding: 14px;
}

.review-steps span {
  display: grid;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 999px;
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
  font-size: 13px;
}

.quality-panel {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 28px;
  margin-top: 36px;
  padding: 22px;
}

.signup-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  margin-top: 18px;
  padding: 22px;
}

.signup-panel p {
  margin: 0 0 18px;
  color: var(--color-muted);
}

.signup-form {
  display: grid;
  gap: 12px;
}

.signup-form label {
  display: grid;
  gap: 6px;
}

.signup-form label span,
.form-note {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 900;
}

.signup-form input,
.signup-form select,
.signup-form textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--color-ink);
  font: inherit;
  font-size: 15px;
  padding: 10px 12px;
}

.signup-form textarea {
  min-height: 92px;
  resize: vertical;
}

.signup-form input::placeholder,
.signup-form textarea::placeholder {
  color: #94a3b8;
}

.signup-form button {
  width: fit-content;
}

.form-note {
  margin: 0;
  line-height: 1.5;
}

.form-success {
  border: 1px solid rgba(21, 128, 61, 0.3);
  border-radius: 8px;
  background: #f0fdf4;
  color: #14532d;
  padding: 16px;
}

.form-success strong {
  display: block;
  margin-bottom: 6px;
  font-weight: 900;
}

.form-success p {
  margin: 0 0 10px;
  color: #166534;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--color-ink);
  font-weight: 700;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 3px;
  display: grid;
  width: 18px;
  height: 18px;
  place-items: center;
  border-radius: 999px;
  background: #dcfce7;
  color: var(--color-success);
  content: "✓";
  font-size: 12px;
}

.phone-demo {
  display: flex;
  max-width: 390px;
  flex-direction: column;
  gap: 12px;
  justify-self: end;
  padding: 16px;
  box-shadow: var(--shadow-soft);
}

.phone-top {
  border-bottom: 1px solid var(--color-border);
  margin: -16px -16px 4px;
  padding: 14px 16px;
  font-weight: 900;
}

.disclaimer {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 18px;
  margin-bottom: 36px;
  padding: 20px;
  border-color: rgba(202, 138, 4, 0.4);
  background: #fffbeb;
}

.disclaimer strong {
  color: #854d0e;
}

.accordion {
  display: grid;
  gap: 12px;
}

.accordion details {
  padding: 0;
  overflow: hidden;
}

.accordion summary {
  cursor: pointer;
  font-weight: 900;
  padding: 18px 20px;
}

.accordion summary::marker {
  color: var(--color-brand);
}

.accordion details p {
  border-top: 1px solid var(--color-border);
  padding: 0 20px 20px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;
  max-width: min(420px, calc(100vw - 36px));
  border: 1px solid rgba(202, 138, 4, 0.4);
  border-radius: 8px;
  background: #fffbeb;
  box-shadow: var(--shadow-soft);
  color: #713f12;
  font-weight: 700;
  padding: 14px 16px;
}

.mobile-sticky-cta {
  display: none;
}

@media (max-width: 1023px) {
  .desktop-nav,
  .header-actions > .button-line {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mobile-nav {
    display: block;
  }

  .hero-grid,
  .split-section,
  .review-layout,
  .line-demo,
  .faq-layout,
  .quality-panel,
  .signup-panel {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 34px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 32px;
  }

  .benefit-grid,
  .material-grid {
    grid-template-columns: 1fr 1fr;
  }

  .workflow-list {
    grid-template-columns: 1fr 1fr;
  }

  .phone-demo {
    justify-self: start;
  }

  .review-visual {
    justify-self: start;
  }

  .review-steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .header-inner,
  .section-inner {
    width: min(100% - 28px, var(--max-width));
  }

  .header-inner {
    min-height: 64px;
  }

  .wordmark-logo {
    width: 152px;
  }

  .section {
    padding: 58px 0;
  }

  .hero {
    padding-top: 42px;
  }

  h1 {
    font-size: 36px;
    line-height: 1.22;
  }

  h2 {
    font-size: 28px;
  }

  h3 {
    font-size: 18px;
  }

  .hero-lead,
  .section-lead {
    font-size: 16px;
  }

  .hero-actions,
  .card-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .benefit-grid,
  .workflow-list,
  .material-grid,
  .review-grid,
  .review-steps,
  .check-list {
    grid-template-columns: 1fr;
  }

  .workflow-list li {
    min-height: auto;
  }

  .section-heading-row {
    display: block;
  }

  .section-heading-row .text-link {
    display: inline-flex;
    margin-top: 14px;
  }

  .viewer-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-preview::before {
    inset: 18px 0 -10px 12px;
  }

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

  .mobile-sticky-cta {
    position: fixed;
    right: 14px;
    bottom: 14px;
    left: 14px;
    z-index: 40;
    display: block;
    opacity: 0;
    pointer-events: none;
    transform: translateY(18px);
    transition: opacity 160ms ease, transform 160ms ease;
  }

  .mobile-sticky-cta.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .mobile-sticky-cta .button {
    width: 100%;
  }
}

@media (max-width: 380px) {
  h1 {
    font-size: 32px;
  }

  .button {
    padding-inline: 14px;
  }

  .wordmark-mark {
    width: 34px;
    height: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}