/* Trang Giới thiệu (/gioi-thieu/) — câu chuyện thương hiệu Giao Duyên, theo bản mô phỏng website 2026.
   Markup: page-gioi-thieu.php. Nạp riêng trên trang này (inc/gd-about.php). */

.ga {
  --ga-green: #123a2f;
  --ga-green-2: #1a4a3d;
  --ga-gold: #b98a3e;
  --ga-gold-soft: #d8b26a;
  --ga-wine: #8b2a2a;
  --ga-paper: #faf7f0;
  --ga-cream: #f2ede3;
  --ga-card: #fffdf8;
  --ga-ink: #1b2420;
  --ga-muted: #5d6763;
  --ga-line: rgba(27, 36, 32, .1);
  --ga-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --ga-sans: "Be Vietnam Pro", -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
  background: var(--ga-paper);
  color: var(--ga-ink);
  font-family: var(--ga-sans);
  font-size: 16px;
  line-height: 1.75;
}

.ga *,
.ga *::before,
.ga *::after {
  box-sizing: border-box;
}

.ga p,
.ga ol,
.ga ul,
.ga blockquote,
.ga picture,
.ga figure {
  margin: 0;
}

.ga ol,
.ga ul {
  padding: 0;
  list-style: none;
}

.ga li {
  margin: 0;
}

.ga a {
  text-decoration: none;
}

.ga img {
  display: block;
  max-width: 100%;
  height: auto;
}

.ga h1,
.ga h2,
.ga h3 {
  margin: 0;
  color: var(--ga-ink);
  font-family: var(--ga-serif);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.18;
  text-transform: none;
}

.ga h2 {
  font-size: clamp(30px, 3.4vw, 46px);
}

.ga-wrap {
  width: min(1200px, 100% - 48px);
  margin: 0 auto;
}

.ga-paper {
  background: var(--ga-paper);
}

.ga-cream {
  background: var(--ga-cream);
}

.ga-center {
  text-align: center;
}

.ga-eyebrow {
  margin-bottom: 18px !important;
  color: var(--ga-wine);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1.5;
  text-transform: uppercase;
}

.ga-eyebrow--gold {
  color: var(--ga-gold-soft);
}

.ga h2 + p,
.ga h2 + .ga-model__sub {
  margin-top: 26px;
}

.ga p + p {
  margin-top: 16px;
}

/* Trích dẫn có vạch vàng */
.ga-quote {
  margin-top: 34px !important;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--ga-gold);
  color: var(--ga-green);
  font-family: var(--ga-serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.5;
}

.ga-quote--light {
  color: #f6efe0;
}

/* Nút & liên kết */
.ga-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 34px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}

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

.ga-btn--dark {
  background: var(--ga-green);
  color: #fff !important;
}

.ga-btn--dark:hover {
  background: var(--ga-green-2);
}

.ga-btn--gold {
  background: var(--ga-gold);
  color: var(--ga-green) !important;
}

.ga-btn--gold:hover {
  background: var(--ga-gold-soft);
}

.ga-btn--ghost {
  border-color: var(--ga-gold);
  color: var(--ga-gold-soft) !important;
}

.ga-btn--ghost:hover {
  background: rgba(185, 138, 62, .14);
}

.ga-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  color: var(--ga-green) !important;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid currentColor;
}

.ga-link--light {
  color: var(--ga-gold-soft) !important;
}

/* 01 · Mở đầu ------------------------------------------------------------ */
.ga-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(760px, 92vh);
  padding: 110px 0 70px;
  background: linear-gradient(180deg, rgba(10, 22, 18, .58), rgba(10, 22, 18, .72)), var(--ga-bg) center / cover no-repeat;
  color: #fff;
  text-align: center;
}

.ga-hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ga .ga-hero h1 {
  max-width: 900px;
  color: #fff;
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: 1.14;
}

.ga-hero__lead {
  max-width: 820px;
  margin-top: 28px;
  color: rgba(255, 255, 255, .88);
  font-size: 16px;
}

.ga-hero__pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  width: 100%;
  margin-top: 56px !important;
  text-align: left;
}

.ga-hero__pillars li {
  padding: 24px 26px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 16px;
  background: rgba(255, 255, 255, .09);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.ga-hero__pillars small {
  display: block;
  color: var(--ga-gold-soft);
  font-size: 12px;
  font-weight: 700;
}

.ga-hero__pillars b {
  display: block;
  margin: 6px 0 8px;
  color: #fff;
  font-family: var(--ga-serif);
  font-size: 20px;
  line-height: 1.35;
}

.ga-hero__pillars span {
  display: block;
  color: rgba(255, 255, 255, .78);
  font-size: 14px;
  line-height: 1.65;
}

/* 02 · Ảnh + chữ --------------------------------------------------------- */
.ga-split {
  padding: 110px 0;
}

.ga-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.ga-split__text p {
  color: var(--ga-muted);
}

.ga-frame img {
  width: 100%;
  border: 1px solid var(--ga-green);
  border-radius: 18px;
  box-shadow: 0 30px 60px -36px rgba(18, 58, 47, .55);
}

/* 03 · Tên gọi ----------------------------------------------------------- */
.ga-name {
  position: relative;
  padding: 110px 0;
  background: var(--ga-green);
  color: rgba(255, 255, 255, .84);
}

.ga-name::after {
  content: "";
  position: absolute;
  right: -160px;
  bottom: -220px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .04);
  pointer-events: none;
}

.ga-name__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 70px;
  align-items: center;
}

.ga .ga-name h2,
.ga .ga-name h3 {
  color: #fff;
}

.ga-name__card {
  padding: 46px 44px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 22px;
  background: rgba(255, 255, 255, .07);
}

.ga .ga-name__card h3 {
  margin-bottom: 26px;
  font-size: 26px;
  line-height: 1.35;
}

.ga-name__card p {
  font-size: 15px;
}

.ga-name__tag {
  margin-top: 34px !important;
  color: var(--ga-gold-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

/* 04 · Mô hình ----------------------------------------------------------- */
.ga-model {
  padding: 110px 0;
}

.ga-model h2 {
  max-width: 860px;
}

.ga-model__sub {
  color: var(--ga-muted);
}

.ga-model__steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 44px;
  margin: 56px 0 50px !important;
  counter-reset: none;
}

.ga-model__steps li {
  position: relative;
  padding: 30px 28px 34px;
  border-radius: 18px;
  background: var(--ga-card);
  box-shadow: 0 20px 44px -34px rgba(18, 58, 47, .4);
}

.ga-model__steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -36px;
  width: 28px;
  height: 12px;
  background: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 28 12'%3E%3Cpath d='M0 6h26M21 1l5 5-5 5' fill='none' stroke='%23b98a3e' stroke-width='1.6'/%3E%3C/svg%3E");
}

.ga-model__steps small {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ga-gold);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.ga-model__steps b {
  display: block;
  margin: 18px 0 10px;
  color: var(--ga-green);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.ga-model__steps span {
  display: block;
  color: var(--ga-muted);
  font-size: 14px;
  line-height: 1.7;
}

.ga-model__note {
  max-width: 900px;
  margin: 0 auto 36px !important;
  color: var(--ga-muted);
  text-align: center;
}

/* 05 · Sự phù hợp -------------------------------------------------------- */
.ga-fit {
  padding: 110px 0;
}

.ga-fit__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.ga-fit__text p {
  color: var(--ga-muted);
}

.ga-fit__media img {
  width: 100%;
  border-radius: 6px;
}

.ga-fit__cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 48px !important;
}

.ga-fit__cards li {
  padding: 26px 24px;
  border-radius: 12px;
  background: var(--ga-card);
}

.ga-fit__cards li::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin-bottom: 18px;
  background: var(--ga-gold);
}

.ga-fit__cards b {
  display: block;
  color: var(--ga-green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.ga-fit__cards span {
  display: block;
  margin-top: 8px;
  color: var(--ga-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* 06 & 09 · Ảnh nửa trái + bảng xanh ------------------------------------- */
.ga-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 640px;
  background: var(--ga-green);
}

.ga-band--showroom {
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
}

.ga-band__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ga-band__panel {
  align-self: center;
  max-width: 640px;
  padding: 90px 64px;
  color: rgba(255, 255, 255, .84);
}

.ga .ga-band__panel h2 {
  color: #fff;
}

.ga-band__panel p {
  font-size: 15px;
}

.ga-band__panel .ga-btn {
  margin-top: 22px;
}

/* 07 · Trao quyền lựa chọn ----------------------------------------------- */
.ga-choice {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  align-items: center;
  min-height: 700px;
}

.ga-choice__media {
  align-self: stretch;
}

.ga-choice__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ga-choice__card {
  position: relative;
  z-index: 1;
  margin: 60px 48px 60px -90px;
  padding: 60px 56px;
  border-radius: 22px;
  background: var(--ga-card);
  box-shadow: 0 30px 70px -40px rgba(18, 58, 47, .45);
}

.ga-choice__card p {
  color: var(--ga-muted);
  font-size: 15px;
}

/* 08 · Doanh nghiệp ------------------------------------------------------ */
.ga-biz {
  padding: 120px 0;
  background: linear-gradient(90deg, rgba(8, 20, 16, .9), rgba(8, 20, 16, .72) 55%, rgba(8, 20, 16, .62)), var(--ga-bg) center / cover no-repeat;
  color: rgba(255, 255, 255, .84);
}

.ga-biz__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 70px;
  align-items: center;
}

.ga .ga-biz h2 {
  color: #fff;
}

.ga-biz__text p {
  font-size: 15px;
}

.ga-biz__cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.ga-biz__cards li {
  padding: 26px 22px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 14px;
  background: rgba(255, 255, 255, .08);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.ga-biz__cards small {
  color: var(--ga-gold-soft);
  font-size: 12px;
  font-weight: 700;
}

.ga-biz__cards b {
  display: block;
  margin: 10px 0;
  color: #fff;
  font-family: var(--ga-serif);
  font-size: 19px;
  line-height: 1.3;
  text-transform: uppercase;
}

.ga-biz__cards span {
  display: block;
  font-size: 13px;
  line-height: 1.6;
}

/* 10 · Hành trình showroom (kéo ngang) ----------------------------------- */
.ga-tour {
  padding: 110px 0 90px;
}

.ga-tour h2 {
  max-width: 820px;
}

.ga-tour__track {
  display: grid;
  grid-auto-columns: minmax(230px, 1fr);
  grid-auto-flow: column;
  gap: 20px;
  width: min(1200px, 100% - 48px);
  margin: 44px auto 0;
  padding-bottom: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--ga-gold) transparent;
}

.ga-tour__track:focus-visible {
  outline: 2px solid var(--ga-gold);
  outline-offset: 4px;
}

.ga-tour__item {
  scroll-snap-align: start;
  overflow: hidden;
  border-radius: 6px;
  background: var(--ga-card);
}

.ga-tour__item img {
  width: 100%;
  aspect-ratio: 380 / 552;
  object-fit: cover;
}

.ga-tour__item figcaption {
  min-height: 84px;
  padding: 14px 16px 18px;
  color: var(--ga-green);
  font-family: var(--ga-serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.ga-tour__item:first-child figcaption {
  background: var(--ga-green);
  color: #fff;
}

.ga-tour__item figcaption small {
  display: block;
  margin-bottom: 4px;
  color: var(--ga-gold);
  font-family: var(--ga-sans);
  font-size: 11px;
}

.ga-tour__hint {
  margin-top: 18px !important;
  color: var(--ga-muted);
  font-size: 13px;
  text-align: center;
}

/* 11 · Bốn nguyên tắc ---------------------------------------------------- */
.ga-principles {
  padding: 110px 0;
}

.ga-principles h2 {
  max-width: 900px;
}

.ga-principles__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  margin-top: 50px !important;
}

.ga-principles__grid li {
  display: flex;
  gap: 30px;
  padding: 40px 38px;
  border-radius: 18px;
  background: var(--ga-cream);
}

.ga-principles__grid small {
  flex: none;
  color: var(--ga-gold);
  font-family: var(--ga-serif);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.1;
}

.ga .ga-principles__grid h3 {
  color: var(--ga-green);
  font-size: 22px;
}

.ga-principles__grid p {
  margin-top: 14px;
  color: var(--ga-muted);
  font-size: 14px;
}

/* 12 · Giá trị & năng lực ------------------------------------------------ */
.ga-value {
  padding: 110px 0;
  background: var(--ga-green);
  color: rgba(255, 255, 255, .82);
}

.ga-value__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.ga-value__col {
  padding-right: 56px;
}

.ga-value__col + .ga-value__col {
  padding: 0 0 0 56px;
  border-left: 1px solid rgba(255, 255, 255, .14);
}

.ga .ga-value h2 {
  color: #fff;
  font-size: clamp(28px, 3vw, 40px);
}

.ga-value__col p {
  font-size: 15px;
}

.ga-value__rows {
  display: grid;
  gap: 14px;
  margin-top: 34px !important;
}

.ga-value__rows li {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 22px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .07);
  font-size: 14px;
}

.ga-value__rows b {
  color: var(--ga-gold-soft);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* 13 · Tầm nhìn ---------------------------------------------------------- */
.ga-vision {
  padding: 110px 0 90px;
}

.ga-vision__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, .8fr);
  gap: 64px;
  align-items: center;
}

.ga-vision__grid p {
  color: var(--ga-muted);
}

.ga-vision__card {
  padding: 44px 36px;
  border-radius: 22px;
  background: var(--ga-green);
  text-align: center;
}

.ga .ga-vision__card p {
  color: rgba(255, 255, 255, .8);
  font-size: 13px;
}

.ga .ga-vision__card .ga-vision__motto {
  margin-bottom: 14px;
  color: #fff;
  font-family: var(--ga-serif);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  text-transform: uppercase;
}

/* 14 · Lời mời ----------------------------------------------------------- */
.ga-cta {
  padding: 90px 0;
  background: var(--ga-green);
  color: rgba(255, 255, 255, .82);
}

.ga-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 60px;
  align-items: center;
}

.ga .ga-cta h2 {
  color: #fff;
  font-size: clamp(28px, 3vw, 40px);
}

.ga-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.ga-cta__features {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.ga-cta__features b {
  display: block;
  margin-bottom: 8px;
  color: var(--ga-gold-soft);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.ga-cta__features span {
  display: block;
  font-size: 13px;
  line-height: 1.6;
}

/* Hiện dần khi cuộn ------------------------------------------------------ */
.ga-js .ga-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
}

.ga-js .ga-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Màn hình vừa & nhỏ ----------------------------------------------------- */
@media (max-width: 1100px) {
  .ga-model__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ga-model__steps li::after {
    display: none;
  }

  .ga-fit__cards,
  .ga-cta__features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ga-biz__grid,
  .ga-cta__grid,
  .ga-vision__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 44px;
  }
}

@media (max-width: 849px) {
  .ga {
    font-size: 15px;
  }

  .ga-wrap,
  .ga-tour__track {
    width: calc(100% - 32px);
  }

  .ga-hero {
    min-height: 0;
    padding: 90px 0 56px;
  }

  .ga-hero__pillars,
  .ga-split__grid,
  .ga-name__grid,
  .ga-fit__grid,
  .ga-principles__grid,
  .ga-value__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ga-hero__pillars {
    gap: 14px;
    margin-top: 40px !important;
  }

  .ga-split,
  .ga-name,
  .ga-model,
  .ga-fit,
  .ga-principles,
  .ga-value,
  .ga-vision,
  .ga-tour {
    padding: 72px 0;
  }

  .ga-split__grid,
  .ga-name__grid,
  .ga-fit__grid {
    gap: 40px;
  }

  .ga-name__card,
  .ga-choice__card {
    padding: 34px 26px;
  }

  .ga-model__steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .ga-band,
  .ga-band--showroom,
  .ga-choice {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }

  .ga-band__media img,
  .ga-choice__media img {
    max-height: 440px;
  }

  .ga-band__panel {
    max-width: none;
    padding: 56px 20px 64px;
  }

  .ga-choice__card {
    margin: -60px 16px 56px;
  }

  .ga-biz {
    padding: 80px 0;
  }

  .ga-biz__cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .ga-principles__grid li {
    gap: 18px;
    padding: 28px 24px;
  }

  .ga-value__col,
  .ga-value__col + .ga-value__col {
    padding: 0;
    border: 0;
  }

  .ga-value__col + .ga-value__col {
    margin-top: 56px;
    padding-top: 56px;
    border-top: 1px solid rgba(255, 255, 255, .14);
  }

  .ga-value__rows li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .ga-quote {
    font-size: 18px;
  }
}

@media (max-width: 520px) {
  .ga-fit__cards,
  .ga-cta__features {
    grid-template-columns: minmax(0, 1fr);
  }

  .ga-tour__track {
    grid-auto-columns: 72%;
  }
}