:root {
  --bg: #f6f3ee;
  --surface: #ffffff;
  --surface-soft: #f3f0ea;
  --surface-alt: #fbfaf7;
  --text: #18212b;
  --text-muted: #5e6a76;
  --text-light: #e8edf3;
  --line: #dde3e7;
  --line-strong: #c9d1d8;
  --brand: #2c4f67;
  --brand-dark: #1d3748;
  --brand-soft: #d9e5ee;
  --accent: #b67a39;
  --danger: #b14934;
  --success: #2f6b45;
  --shadow-soft: 0 10px 24px rgba(16, 24, 32, 0.04);
  --shadow-card: 0 14px 30px rgba(16, 24, 32, 0.05);
  --radius-large: 20px;
  --radius-medium: 16px;
  --radius-small: 12px;
  --shell: min(1160px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #f8f6f1 0%, #f3f5f7 100%);
  color: var(--text);
  font-family: "Noto Sans TC", "IBM Plex Sans", sans-serif;
  line-height: 1.7;
}

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

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

p,
ul,
pre {
  margin: 0;
}

ul {
  padding-left: 1.15rem;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: "Noto Sans TC", "Manrope", sans-serif;
  line-height: 1.14;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.4rem, 4.2vw, 3.8rem);
  font-weight: 900;
}

h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  font-weight: 800;
}

h3 {
  font-size: clamp(1.2rem, 1.6vw, 1.55rem);
  font-weight: 800;
}

.shell {
  width: var(--shell);
  margin: 0 auto;
}

.section {
  padding: 72px 0;
}

.section--light,
.page-hero {
  background: transparent;
}

.stack,
.stack-large {
  display: grid;
  gap: 20px;
}

.stack-large {
  gap: 28px;
}

.section-label,
.site-footer__eyebrow,
.project-preview__type,
.feature-split__index {
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 246, 241, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(24, 33, 43, 0.08);
}

.site-header__inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-mark,
.logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.logo__mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-dark);
  color: #fff;
  font-family: "Manrope", sans-serif;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.logo__wording {
  display: grid;
  gap: 2px;
}

.logo__kicker {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.logo__name {
  font-size: 1rem;
  font-weight: 900;
  color: var(--text);
}

.logo--footer .logo__mark {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.logo--footer .logo__kicker,
.logo--footer .logo__name {
  color: var(--text-light);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav__link {
  position: relative;
  padding: 6px 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--text);
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.language-switch__link {
  min-width: 50px;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.language-switch__link.is-active {
  background: var(--brand-dark);
  color: #fff;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

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

.button--small {
  min-height: 42px;
  padding: 0 16px;
}

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

.button--solid:hover {
  background: #122632;
}

.button--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.hero__grid,
.intro-block,
.two-column,
.closing-cta,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 32px;
  align-items: start;
}

.hero__content,
.hero__visual,
.info-card,
.service-card,
.project-preview,
.contact-card,
.contact-form-card,
.timeline__item,
.project-card,
.closing-cta,
.page-hero__content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-soft);
}

.hero__summary,
.page-hero__content p,
.intro-block__text,
.info-card p,
.service-card p,
.feature-split__copy p,
.project-preview p,
.timeline__item p,
.contact-card p,
.contact-form-card p {
  font-size: 1rem;
}

.closing-cta__list,
.feature-split__list {
  display: grid;
  gap: 10px;
  color: var(--text-muted);
}

.closing-cta__list li::marker,
.feature-split__list li::marker {
  color: var(--accent);
}

.intro-block__text,
.section-summary,
.project-card__meta p:last-child,
.contact-card__address,
.contact-card__note,
.service-card__detail,
.project-card__impact,
.draft-preview pre {
  color: var(--text-muted);
}

.section-heading {
  display: grid;
  gap: 8px;
  max-width: 720px;
  margin-bottom: 24px;
}

.section-heading--compact {
  margin-bottom: 0;
}

.section-heading--narrow {
  max-width: 620px;
}

.section--home-primary {
  padding-top: 56px;
}

.about-intro {
  display: grid;
  gap: 14px;
  max-width: 860px;
}

.about-intro__body {
  max-width: 60ch;
}

.about-intro__body p {
  color: var(--text-muted);
}

.section--about-principles {
  padding-top: 52px;
}

.section--about-details {
  padding-top: 56px;
}

.card-grid,
.service-grid,
.project-preview-grid {
  display: grid;
  gap: 18px;
}

.card-grid--tight {
  gap: 14px;
}

.service-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-preview-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.two-column--balanced {
  grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
  gap: 24px;
}

.info-card,
.service-card,
.project-preview,
.contact-card {
  padding: 24px;
}

.info-card h3,
.service-card h3,
.project-preview h3 {
  margin: 6px 0 10px;
}

.service-card {
  border-top: 3px solid var(--brand-soft);
}

.service-card__meta {
  display: grid;
  gap: 8px;
}

.service-card__label,
.project-card__label,
.draft-preview__label {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
}

.project-preview {
  min-height: 100%;
  padding: 24px;
}

.project-preview--with-image,
.info-card--with-image,
.service-card--with-image {
  overflow: hidden;
}

.project-preview__visual,
.info-card__visual,
.service-card__visual {
  min-height: 180px;
  margin: -24px -24px 18px;
  background-position: center;
  background-size: cover;
}

.project-preview__body {
  display: grid;
  gap: 8px;
}

.project-preview__proof {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}

.project-preview__impact {
  margin-top: 12px;
  color: var(--text);
  font-weight: 600;
}

.section--dark {
  color: var(--text-light);
}

.section--dark .shell {
  padding: 32px;
  background: linear-gradient(180deg, #223745 0%, #1a2c38 100%);
  border-radius: 22px;
}

.section--dark .section-label,
.section--dark .feature-split__index {
  color: #a9c2d3;
}

.section--dark .section-heading h2,
.section--dark .feature-split__copy h3 {
  color: #fff;
}

.section--dark .feature-split__copy p,
.section--dark .feature-split__list {
  color: #d7e3eb;
}

.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 400px);
  gap: 20px;
  align-items: stretch;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.feature-split:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.feature-split:nth-of-type(even) {
  grid-template-columns: minmax(320px, 400px) minmax(0, 1fr);
}

.feature-split:nth-of-type(even) .feature-split__visual {
  order: -1;
}

.feature-split__copy {
  display: grid;
  gap: 12px;
}

.feature-split__visual {
  min-height: 220px;
  border-radius: var(--radius-medium);
  background-size: cover;
  background-position: center;
}

.page-hero {
  padding: 20px 0 8px;
}

.page-hero .section-label {
  margin-bottom: 10px;
}

.page-hero__content {
  padding: 20px 22px;
  display: grid;
  gap: 10px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list span,
.response-promise span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  font-size: 0.84rem;
  font-weight: 700;
}

.tag-list--static {
  margin-top: 18px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline__item {
  padding: 18px;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
}

.timeline__index {
  font-size: 0.84rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: var(--brand);
}

.service-card--detailed ul {
  margin-top: 8px;
}

.project-list {
  display: grid;
  gap: 20px;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  overflow: hidden;
}

.project-card__visual {
  min-height: 280px;
  background-position: center;
  background-size: cover;
}

.project-card__body {
  display: grid;
  gap: 14px;
  padding: 24px;
}

.project-card__meta {
  display: grid;
  gap: 8px;
}

.contact-card {
  background: linear-gradient(180deg, #f7fafc 0%, #eef3f7 100%);
}

.section--services-primary {
  padding-top: 46px;
}

.section--services-secondary,
.section--contact-main {
  padding-top: 52px;
}

.service-grid--slim {
  gap: 14px;
}

.contact-layout--slim {
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  gap: 24px;
}

.contact-card__link {
  font-size: clamp(1.3rem, 2.3vw, 2rem);
  font-family: "Manrope", "Noto Sans TC", sans-serif;
  font-weight: 800;
  word-break: break-word;
}

.contact-form-card {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.contact-form-card__heading {
  display: grid;
  gap: 8px;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field__label {
  font-size: 0.9rem;
  font-weight: 700;
}

.field__control {
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.field__control:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(44, 79, 103, 0.12);
}

.field__control--textarea {
  min-height: 180px;
  resize: vertical;
}

.field__control.is-invalid {
  border-color: rgba(177, 73, 52, 0.8);
  background: #fff8f6;
}

.field__error {
  font-size: 0.85rem;
  color: var(--danger);
}

.form-alert {
  padding: 20px;
  border-radius: 16px;
}

.form-alert h4 {
  margin-bottom: 8px;
}

.form-alert--success {
  border: 1px solid rgba(47, 107, 69, 0.2);
  background: #eef7f0;
}

.draft-preview {
  display: grid;
  gap: 12px;
  padding: 20px;
  border-radius: 16px;
  border: 1px dashed var(--line-strong);
  background: var(--surface-alt);
}

.draft-preview__subject {
  color: var(--text);
}

.draft-preview pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "IBM Plex Sans", sans-serif;
}

.response-promise {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.closing-cta {
  padding: 28px;
}

.closing-cta--home {
  background: linear-gradient(180deg, #ffffff 0%, #f6f4ef 100%);
}

.site-footer {
  padding: 52px 0;
  background: #162733;
  color: var(--text-light);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 24px;
}

.site-footer__brand {
  display: grid;
  gap: 16px;
}

.site-footer__title {
  font-size: clamp(1.6rem, 2.2vw, 2.2rem);
  color: #fff;
}

.site-footer__text,
.site-footer__contact p,
.site-footer__contact a {
  color: #c8d5de;
}

.site-footer__legal {
  color: #9eb6c7;
  font-size: 0.88rem;
}

.site-footer__links,
.site-footer__contact {
  display: grid;
  gap: 10px;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
}

@media (max-width: 980px) {
  .hero__grid,
  .intro-block,
  .two-column,
  .closing-cta,
  .contact-layout,
  .feature-split,
  .project-card,
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .service-grid,
  .project-preview-grid,
  .contact-form__grid {
    grid-template-columns: 1fr;
  }

  .feature-split:nth-of-type(even) {
    grid-template-columns: 1fr;
  }

  .feature-split:nth-of-type(even) .feature-split__visual {
    order: 0;
  }

  .site-nav {
    position: fixed;
    top: 78px;
    right: 24px;
    left: 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 22px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-card);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav .button {
    width: 100%;
  }

  .nav-toggle {
    display: inline-block;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100vw - 32px, 1160px);
  }

  .section,
  .page-hero {
    padding: 56px 0 20px;
  }

  .site-header__inner {
    min-height: 72px;
  }

  .site-nav {
    top: 72px;
    right: 16px;
    left: 16px;
  }

  .info-card,
  .service-card,
  .project-preview,
  .contact-card,
  .contact-form-card,
  .timeline__item,
  .project-card__body,
  .page-hero__content,
  .closing-cta {
    padding: 20px;
  }

  .logo__mark {
    width: 42px;
    height: 42px;
  }

  .logo__kicker {
    font-size: 0.62rem;
  }

  .logo__name {
    font-size: 0.94rem;
  }
}