/* =============================================================
   狄安邁國際有限公司 — DnM Capital
   Design system derived from brand logo + business card:
   deep navy ink · warm gold accent · ivory paper
   ============================================================= */

:root {
  /* Palette — paper / ink / single gold accent */
  --paper: #ffffff; /* clean white base */
  --paper-2: #f5f6f8; /* cool light grey for alt sections */
  --paper-3: #eceef1; /* light fills */
  --ink: #16223c; /* deep navy from the "Dn" wordmark */
  --ink-soft: #2c3a55;
  --ink-mute: #687080;
  --gold: #b08948; /* the warm "M" gold */
  --gold-deep: #8a6a33;
  --gold-soft: #d8be8e; /* lighter gold for dark surfaces */
  --line: rgba(22, 34, 60, 0.11);
  --line-soft: rgba(22, 34, 60, 0.06);

  /* Type */
  --display: 'Fraunces', 'Noto Serif TC', 'Songti TC', serif;
  --serif-tc: 'Noto Serif TC', 'Songti TC', serif;
  --sans:
    'Noto Sans TC', 'PingFang TC', 'Helvetica Neue', system-ui, sans-serif;

  /* Rhythm */
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --maxw: 1280px;
  --section-pad: clamp(5rem, 11vw, 11rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ------------------------------------------------------------- reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}

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

/* ------------------------------------------------------------- layout */
.shell {
  width: min(100% - 2 * var(--gutter), var(--maxw));
  margin-inline: auto;
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}
.eyebrow::before {
  content: '';
  width: 2.4rem;
  height: 1px;
  background: var(--gold);
  display: inline-block;
}

h1,
h2,
h3 {
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.display {
  font-family: var(--serif-tc);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0.02em;
}

/* ------------------------------------------------------------- nav */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.05rem var(--gutter);
  background: #ffffff;
  border-bottom: 1px solid var(--line-soft);
  transition:
    box-shadow 0.4s var(--ease),
    padding 0.4s var(--ease),
    border-color 0.4s var(--ease);
}
.nav.is-scrolled {
  border-bottom-color: transparent;
  box-shadow: 0 6px 24px rgba(22, 34, 60, 0.07);
  padding-block: 0.72rem;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav__brand img {
  height: clamp(26px, 3.2vw, 34px);
  width: auto;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.4vw, 2.75rem);
}
.nav__links a {
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  position: relative;
  padding-block: 0.2rem;
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 0;
  background: var(--gold);
  transition: width 0.35s var(--ease);
}
.nav__links a:hover::after,
.nav__links a.is-active::after {
  width: 100%;
}
.nav__toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.4rem;
}
.nav__toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: 0.3s var(--ease);
}

@media (max-width: 860px) {
  .nav__toggle {
    display: block;
  }
  .nav__links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(78vw, 340px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.75rem;
    padding: 2rem 2.4rem;
    background: var(--paper);
    box-shadow: -20px 0 60px rgba(22, 34, 60, 0.12);
    transform: translateX(100%);
    transition: transform 0.45s var(--ease);
  }
  .nav__links.is-open {
    transform: translateX(0);
  }
  .nav__links a {
    font-size: 1.4rem;
    font-family: var(--serif-tc);
  }
  .nav.is-open .nav__toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav.is-open .nav__toggle span:nth-child(2) {
    opacity: 0;
  }
  .nav.is-open .nav__toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* ------------------------------------------------------------- hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  padding: clamp(6rem, 14vh, 11rem) var(--gutter) clamp(3rem, 7vh, 5rem);
  overflow: hidden;
}
.hero__art {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__art svg,
.hero__art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      180deg,
      rgba(16, 34, 60, 0.34) 0%,
      rgba(16, 34, 60, 0.12) 30%,
      rgba(16, 34, 60, 0.5) 68%,
      rgba(16, 34, 60, 0.9) 100%
    ),
    linear-gradient(
      90deg,
      rgba(16, 34, 60, 0.58) 0%,
      rgba(16, 34, 60, 0.14) 52%,
      rgba(16, 34, 60, 0) 80%
    );
}
.hero__inner {
  position: relative;
  z-index: 2;
  width: min(100%, var(--maxw));
  margin-inline: auto;
  margin-top: 25svh;
}
.hero__eyebrow {
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}
.hero .eyebrow {
  color: var(--gold-soft);
}
.hero .eyebrow::before {
  background: var(--gold-soft);
}
.hero h1 {
  font-family: var(--serif-tc);
  font-size: clamp(1.95rem, 7vw, 5rem);
  letter-spacing: 0.01em;
  line-height: 1.1;
  max-width: 24ch;
  overflow-wrap: break-word;
  color: #fff;
  text-shadow: 0 1px 30px rgba(8, 16, 30, 0.35);
  margin-bottom: 8rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--gold-soft);
}
.hero__lede {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  font-size: clamp(1.05rem, 1.4vw, 1.3rem);
  max-width: 44ch;
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.85;
  text-shadow: 0 1px 18px rgba(8, 16, 30, 0.3);
}
.hero__meta {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  border-top: 1px solid rgba(255, 255, 255, 0.26);
  padding-top: 1.5rem;
}
.hero__meta div {
  min-width: 8rem;
}
.hero__meta dt {
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}
.hero__meta dd {
  font-family: var(--serif-tc);
  font-size: clamp(1.5rem, 4.5vw, 1.9rem);
  font-weight: 600;
  color: #fff;
  margin-top: 0.25rem;
}
.hero__meta dd span {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.55);
}

/* scroll cue */
.scrollcue {
  position: absolute;
  right: var(--gutter);
  bottom: clamp(3rem, 7vh, 5rem);
  z-index: 2;
  writing-mode: vertical-rl;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.scrollcue::after {
  content: '';
  width: 1px;
  height: 4rem;
  background: linear-gradient(var(--gold), transparent);
}
@media (max-width: 860px) {
  .scrollcue {
    display: none;
  }
}

/* ------------------------------------------------------------- section frame */
.section {
  padding-block: var(--section-pad);
  position: relative;
}
.section--alt {
  background: var(--paper-2);
}
.section__head {
  max-width: 60ch;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}
.section__head h2 {
  font-family: var(--serif-tc);
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  margin-top: 1.25rem;
  letter-spacing: 0.01em;
  line-height: 1.2;
}
.section__index {
  font-family: var(--display) !important;
  font-size: 1.5rem !important;
  color: var(--gold-deep) !important;
  font-weight: 600 !important;
  letter-spacing: 0.05em !important;
}
.section__head--full {
  max-width: none;
}
.section__head--full p {
  max-width: 70ch;
}

/* full-width divider */
.rule {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: clamp(3rem, 6vw, 5rem) 0;
}

/* ------------------------------------------------------------- reasons / thesis grid */
.reasons {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  display: grid;
  gap: clamp(1.75rem, 3.5vw, 2.75rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}
.reason {
  border-top: 1px solid rgba(22, 34, 60, 0.22);
  padding-top: 1.25rem;
}
.reason__num {
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold-deep);
}
.reason h3 {
  font-family: var(--serif-tc);
  font-size: 1.3rem;
  line-height: 1.4;
  margin: 0.8rem 0 0.6rem;
}
.reason p {
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------- stats */
.stats {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}
.stat {
  border-top: 2px solid var(--gold);
  padding-top: 1.25rem;
}
.stat__num {
  font-family: var(--serif-tc);
  font-weight: 600;
  font-size: clamp(2.8rem, 6vw, 4.4rem);
  line-height: 1;
  color: var(--gold-deep);
  letter-spacing: 0.01em;
}
.stat__num small {
  font-size: 0.32em;
  font-weight: 600;
  margin-left: 0.2em;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.stat__label {
  margin-top: 1.1rem;
  color: var(--ink-soft);
  font-size: 0.97rem;
  line-height: 1.75;
  max-width: 32ch;
}

/* ------------------------------------------------------------- about */
.about__lede p {
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  line-height: 1.9;
  color: var(--ink-soft);
}
.about__lede p + p {
  margin-top: 1.5rem;
}
.about__lede strong {
  color: var(--ink);
  font-weight: 600;
}

/* ------------------------------------------------------------- portfolio */
.portfolio__list {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}
.company {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  grid-template-columns: 1fr;
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}
.company:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
@media (min-width: 880px) {
  .company {
    grid-template-columns: 0.9fr 1.1fr;
  }
  .company:nth-child(even) .company__media {
    order: 2;
  }
}
.company__media {
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  background: var(--paper);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.75rem, 5vw, 3.75rem);
  transition: border-color 0.4s var(--ease);
}
.company:hover .company__media {
  border-color: rgba(176, 137, 72, 0.5);
}
.company__media img {
  max-width: 78%;
  max-height: 52%;
  width: auto;
  height: auto;
  object-fit: contain;
}
.company__body {
}
.company__tag {
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.company__name {
  font-family: var(--serif-tc);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin: 0.75rem 0 0.35rem;
}
.company__en {
  font-family: var(--display);
  font-size: 0.95rem;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.company__desc {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  line-height: 1.85;
}
.company__facts {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.25rem;
}
.company__facts div {
}
.company__facts dt {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.company__facts dd {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  margin-top: 0.15rem;
}

/* ------------------------------------------------------------- contact */
.contact {
  background: var(--ink);
  color: var(--paper);
}
.contact .eyebrow {
  color: var(--gold-soft);
}
.contact .eyebrow::before {
  background: var(--gold-soft);
}
.contact__grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 5rem);
  grid-template-columns: 1fr;
}
@media (min-width: 920px) {
  .contact__grid {
    grid-template-columns: 0.85fr 1.15fr;
  }
}
.contact h2 {
  font-family: var(--serif-tc);
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  color: var(--paper);
  margin-top: 1.25rem;
}
.contact__intro {
  margin-top: 1.5rem;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.85;
  max-width: 40ch;
}
.contact__details {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.4rem;
}
.contact__details a,
.contact__details p {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.contact__details dt,
.contact__details .lbl {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-soft);
}
.contact__details .val {
  font-family: var(--display);
  font-size: 1.15rem;
  color: var(--paper);
}
.contact__details a:hover .val {
  color: var(--gold-soft);
}

/* form */
.form {
  display: grid;
  gap: 1.5rem;
}
.form__row {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 560px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}
.field {
  position: relative;
  display: flex;
  flex-direction: column;
}
.field label {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.6rem;
}
.field input,
.field textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 1.02rem;
  padding: 0.6rem 0;
  transition: border-color 0.3s var(--ease);
}
.field textarea {
  resize: vertical;
  min-height: 6rem;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold-soft);
}
.field input::placeholder,
.field textarea::placeholder {
  color: rgba(255, 255, 255, 0.32);
}
.field .err {
  font-size: 0.78rem;
  color: #e9a86a;
  margin-top: 0.5rem;
  min-height: 1rem;
  opacity: 0;
  transition: opacity 0.2s;
}
.field.is-invalid input,
.field.is-invalid textarea {
  border-color: #e9a86a;
}
.field.is-invalid .err {
  opacity: 1;
}

.btn {
  justify-self: start;
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  background: var(--gold);
  color: var(--ink);
  border: 0;
  padding: 0.95rem 2.1rem;
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
  transition:
    transform 0.3s var(--ease),
    background 0.3s var(--ease);
}
.btn:hover {
  background: var(--gold-soft);
  transform: translateY(-2px);
}
.btn svg {
  width: 1.1rem;
  height: 1.1rem;
}
.form__status {
  font-size: 0.92rem;
  color: var(--gold-soft);
  min-height: 1.4rem;
}

/* ------------------------------------------------------------- footer */
.footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.6);
  padding-bottom: 3rem;
}
.footer__inner {
  width: min(100%, var(--maxw));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  align-items: center;
}
.footer__brand {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}
.footer__brand .fm-mark {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.6rem;
  color: var(--gold-soft);
  letter-spacing: 0.01em;
}
.footer__brand .fm-name {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.82);
  letter-spacing: 0.08em;
}
.nav__brand img {
  max-width: 58vw;
}
.footer small {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

/* ------------------------------------------------------------- reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 1s var(--ease),
    transform 1s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.reveal[data-d='1'] {
  transition-delay: 0.1s;
}
.reveal[data-d='2'] {
  transition-delay: 0.2s;
}
.reveal[data-d='3'] {
  transition-delay: 0.3s;
}