/* ============================================================
   SHX 夏恆企業顧問 — Design System
   ============================================================ */

:root {
  /* Brand palette — fresher, lighter sage greens (WCAG-safe with white text) */
  --green-950: #3a594d;
  --green-900: #4a7263;
  --green-800: #5a8576;
  --green-700: #6e9b8a;
  --green-600: #85b09f;
  --green-500: #a0c5b4;

  --gold-600: #b48f43;
  --gold-500: #c9a961;
  --gold-400: #d8bd83;
  --gold-300: #e5d0a4;

  --cream-50:  #f2f6ee;
  --cream-100: #e9efe6;
  --cream-200: #d9e2d6;

  --ink:    #1a2620;
  --muted:  #5d6660;
  --line:   #d8d1c0;
  --white:  #ffffff;

  /* E/S/G pillar accents — lifted, fresher tones */
  --pillar-e: #3d9c6a;
  --pillar-s: #d49654;
  --pillar-g: #3d63a0;

  /* Type */
  --font-serif: "Noto Serif TC", "Cormorant Garamond", "Times New Roman", serif;
  --font-sans:  "Noto Sans TC", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --container: 1240px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius-sm: 6px;
  --radius:    14px;
  --radius-lg: 24px;

  --shadow-sm: 0 2px 10px rgba(10, 42, 28, 0.06);
  --shadow:    0 12px 40px rgba(10, 42, 28, 0.1);
  --shadow-lg: 0 30px 80px rgba(10, 42, 28, 0.18);

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

/* ----- Base ----- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--cream-50);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
img { object-fit: cover; }
a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
button { font: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--green-900);
  letter-spacing: -.01em;
  margin: 0 0 .6em;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1.1em; color: var(--ink); }
.lede { font-size: 1.15rem; color: var(--muted); }

::selection { background: var(--gold-300); color: var(--green-900); }

/* ----- Layout ----- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding: clamp(4rem, 8vw, 7.5rem) 0; }
.section--tight { padding: clamp(3rem, 6vw, 5rem) 0; }
.section--dark {
  background: var(--green-900);
  color: var(--cream-100);
}
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--cream-50); }
.section--dark p { color: rgba(243, 238, 226, .82); }

.section--cream { background: var(--cream-100); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  font-family: var(--font-sans);
  font-size: .8rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold-600);
  font-weight: 600;
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold-500);
}
.section--dark .eyebrow { color: var(--gold-400); }
.section--dark .eyebrow::before { background: var(--gold-400); }

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .95rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .03em;
  transition: all .25s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--gold-500);
  color: var(--ink);
  box-shadow: 0 8px 22px rgba(201, 169, 97, .35);
}
.btn--primary:hover {
  background: var(--gold-400);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(201, 169, 97, .45);
}
.btn--ghost {
  border-color: rgba(255,255,255,.4);
  color: var(--cream-50);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--gold-400);
  color: var(--gold-400);
}
.btn--dark {
  background: var(--green-800);
  color: var(--cream-50);
}
.btn--dark:hover { background: var(--green-700); transform: translateY(-2px); }
.btn--outline {
  border-color: var(--green-800);
  color: var(--green-800);
}
.btn--outline:hover { background: var(--green-800); color: var(--cream-50); }
.btn .arrow {
  display: inline-block;
  transition: transform .25s var(--ease);
}
.btn:hover .arrow { transform: translateX(4px); }

/* ----- Header ----- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(47, 77, 66, .95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(201, 169, 97, .18);
  transition: background .25s var(--ease);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 2rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: .7rem;
}
.logo__mark {
  height: 54px;
  width: auto;
  flex-shrink: 0;
  transition: transform .4s var(--ease);
}
.logo:hover .logo__mark { transform: rotate(-9deg); }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--cream-50);
  transition: color .25s var(--ease);
}
.logo:hover .logo__name { color: var(--gold-400); }
.logo__zh {
  font-size: .68rem;
  letter-spacing: .2em;
  color: var(--gold-400);
  font-weight: 500;
  margin-top: .34rem;
}

.nav { display: flex; align-items: center; gap: 2.2rem; }
.nav a {
  position: relative;
  color: var(--cream-100);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .04em;
  padding: .4rem 0;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1.5px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a:hover { color: var(--gold-400); }
.nav a.is-active { color: var(--gold-400); }

.nav__cta { margin-left: .6rem; }

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  color: var(--cream-50);
  padding: .5rem;
}

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--green-900);
  color: var(--cream-50);
  overflow: hidden;
  padding: 140px 0 80px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 80% 30%, rgba(201,169,97,.18), transparent 70%),
    radial-gradient(40% 40% at 10% 80%, rgba(40, 116, 79, .35), transparent 60%),
    linear-gradient(135deg, var(--green-950) 0%, var(--green-800) 60%, var(--green-700) 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(201,169,97,.06) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: .5;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero__copy h1 {
  color: var(--cream-50);
  font-size: clamp(2.6rem, 5.4vw, 4.4rem);
  margin-bottom: 1.4rem;
}
.hero__copy h1 .accent {
  color: var(--gold-400);
  font-style: italic;
}
.hero__copy p {
  font-size: 1.15rem;
  color: rgba(243, 238, 226, .85);
  max-width: 540px;
  margin-bottom: 2rem;
}
.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero__visual {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(160deg, rgba(201,169,97,.16), transparent 60%),
    var(--green-800);
  border: 1px solid rgba(201,169,97,.3);
  display: grid;
  place-items: center;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero__visual svg { width: 78%; height: auto; opacity: .92; }
.hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(closest-side at 30% 20%, rgba(201,169,97,.15), transparent 70%);
  pointer-events: none;
}

.hero__stats {
  position: absolute;
  bottom: 40px;
  left: 0;
  right: 0;
  z-index: 1;
}
.hero__stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(201,169,97,.2);
}
.stat__num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--gold-400);
  display: block;
}
.stat__label { font-size: .85rem; color: rgba(243, 238, 226, .85); letter-spacing: .05em; }

/* ----- Cards ----- */
.cards {
  display: grid;
  gap: 1.6rem;
}
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--2 { grid-template-columns: repeat(2, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--cream-200);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  position: relative;
  overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

/* ----- Pillar (E/S/G) cards ----- */
.pillar-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.4rem 2rem;
  border: 1px solid var(--cream-200);
  box-shadow: var(--shadow-sm);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.pillar-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
}
.pillar-card:hover::before { transform: scaleX(1); }
.pillar-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.pillar-card__letter {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  line-height: 1;
  color: var(--accent);
  margin-bottom: .8rem;
  letter-spacing: -.02em;
  font-weight: 600;
}
.pillar-card__title { color: var(--green-900); margin-bottom: .8rem; }
.pillar-card p { color: var(--muted); font-size: .95rem; }
.pillar-card ul { padding-left: 1.1rem; margin: 0 0 1.2rem; }
.pillar-card ul li { font-size: .9rem; margin: .35rem 0; color: var(--ink); }
.pillar-card__tags {
  display: flex; flex-wrap: wrap; gap: .4rem;
  margin-bottom: 1rem;
}
.pillar-card__tag {
  font-size: .72rem;
  letter-spacing: .08em;
  padding: .3rem .65rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-weight: 600;
}
.pillar-card[data-pillar="E"] { --accent: var(--pillar-e); }
.pillar-card[data-pillar="S"] { --accent: var(--pillar-s); }
.pillar-card[data-pillar="G"] { --accent: var(--pillar-g); }

/* ----- Process steps ----- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
  margin-top: 3rem;
  counter-reset: step;
}
.step {
  background: var(--cream-50);
  border: 1px solid var(--cream-200);
  border-radius: var(--radius);
  padding: 2rem 1.6rem;
  position: relative;
  transition: all .4s var(--ease);
}
.step:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
}
.step__num {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--gold-600);
  letter-spacing: .15em;
  text-transform: uppercase;
  font-weight: 700;
  display: block;
  margin-bottom: .6rem;
}
.step__icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--green-800), var(--green-600));
  color: var(--gold-400);
  display: grid; place-items: center;
  margin-bottom: 1.2rem;
}
.step h3 { color: var(--green-900); font-size: 1.15rem; margin-bottom: .6rem; }
.step p { font-size: .92rem; color: var(--muted); margin: 0; }

/* ----- Section heading ----- */
.section-head {
  max-width: 760px;
  margin-bottom: 3rem;
}
.section-head--center {
  text-align: center;
  margin-inline: auto;
}
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* ----- Course cards ----- */
.course-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--cream-200);
  display: flex;
  flex-direction: column;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.course-card__cover {
  aspect-ratio: 16/10;
  background:
    linear-gradient(160deg, rgba(255,255,255,.08), transparent 60%),
    linear-gradient(135deg, var(--green-800), var(--green-600));
  position: relative;
  overflow: hidden;
  color: var(--gold-400);
}
.course-card__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(80% 60% at 80% 20%, rgba(201,169,97,.18), transparent 60%),
    linear-gradient(180deg, rgba(10,30,22,.32), transparent 45%);
  z-index: 1;
}
.course-card__cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.course-card__cover-mark {
  position: absolute;
  font-family: var(--font-serif);
  font-size: 7rem;
  line-height: 1;
  bottom: -.4rem;
  right: 1.2rem;
  color: rgba(201,169,97,.22);
  font-weight: 700;
}
.course-card__badges {
  position: absolute;
  top: 1.1rem; left: 1.1rem;
  display: flex; gap: .4rem; flex-wrap: wrap;
  z-index: 2;
  max-width: calc(100% - 6rem);
}
.course-card__icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, .92);
  color: var(--green-800);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 6px 18px rgba(10, 30, 22, .18);
  transition: transform .35s var(--ease), background .35s var(--ease);
}
.course-card:hover .course-card__icon {
  transform: rotate(-6deg) scale(1.06);
  background: var(--gold-400);
  color: var(--green-950);
}
.badge {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .08em;
  padding: .3rem .65rem;
  border-radius: 999px;
  background: var(--gold-500);
  color: var(--ink);
  text-transform: uppercase;
}
.badge--pillar-e { background: var(--pillar-e); color: white; }
.badge--pillar-s { background: var(--pillar-s); color: white; }
.badge--pillar-g { background: var(--pillar-g); color: white; }
.badge--soft {
  background: rgba(250,247,240,.95);
  color: var(--green-800);
}

.course-card__body { padding: 1.8rem; flex-grow: 1; display: flex; flex-direction: column; }
.course-card__body h3 {
  font-size: 1.25rem;
  color: var(--green-900);
  line-height: 1.35;
  margin-bottom: .7rem;
}
.course-card__tagline { color: var(--muted); font-size: .92rem; margin-bottom: 1.2rem; }
.course-card__meta {
  display: flex;
  gap: 1.2rem;
  font-size: .82rem;
  color: var(--muted);
  margin-bottom: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--cream-200);
}
.course-card__meta span { display: inline-flex; align-items: center; gap: .35rem; }
.course-card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--green-800);
  font-weight: 600;
  font-size: .92rem;
  align-self: flex-start;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.course-card__link:hover {
  color: var(--gold-600);
  border-color: var(--gold-500);
}

/* ----- Instructor cards ----- */
.instructor-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--cream-200);
  box-shadow: var(--shadow-sm);
  transition: all .4s var(--ease);
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 0;
}
.instructor-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.instructor-card__photo {
  aspect-ratio: 4/5;
  background-size: cover;
  background-position: center;
  background-color: var(--green-800);
}
.instructor-card__photo--placeholder {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--green-800), var(--green-600));
  color: var(--gold-400);
  font-family: var(--font-serif);
  font-size: 5rem;
}
.instructor-card__body { padding: 2rem 2.2rem; display: flex; flex-direction: column; }
.instructor-card__body h3 { margin-bottom: .35rem; }
.instructor-card__role {
  color: var(--gold-600);
  font-size: .85rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  font-weight: 600;
}
.instructor-card__body p { color: var(--muted); font-size: .95rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1rem 0; }
.tag {
  font-size: .78rem;
  padding: .3rem .7rem;
  border-radius: 999px;
  background: var(--cream-100);
  color: var(--green-800);
  border: 1px solid var(--cream-200);
}

/* ----- Detail / inside page hero ----- */
.page-hero {
  background: var(--green-900);
  color: var(--cream-50);
  padding: 180px 0 90px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(50% 60% at 80% 30%, rgba(201,169,97,.14), transparent 60%),
    linear-gradient(135deg, var(--green-950), var(--green-800));
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(201,169,97,.07) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .4;
}
.page-hero__inner { position: relative; max-width: 820px; }
.page-hero h1 { color: var(--cream-50); margin-bottom: 1rem; }
.page-hero .lede { color: rgba(243,238,226,.82); font-size: 1.2rem; }
.page-hero .breadcrumb {
  display: flex; gap: .55rem; align-items: center;
  font-size: .82rem; color: var(--gold-400);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 1.6rem;
}
.page-hero .breadcrumb a { color: var(--gold-400); opacity: .8; }
.page-hero .breadcrumb a:hover { opacity: 1; }
.page-hero .breadcrumb span { opacity: .5; }

/* ----- Filter chips ----- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-bottom: 3rem;
  align-items: center;
}
.chip {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: .55rem 1.15rem;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 500;
  transition: all .25s var(--ease);
}
.chip:hover { border-color: var(--green-700); color: var(--green-800); }
.chip.is-active {
  background: var(--green-800);
  color: var(--cream-50);
  border-color: var(--green-800);
}

/* ----- Detail page ----- */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 4rem;
  align-items: start;
}
.detail-aside {
  position: sticky;
  top: 110px;
  background: var(--white);
  border: 1px solid var(--cream-200);
  border-radius: var(--radius);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}
.detail-aside h4 {
  color: var(--green-900);
  font-size: 1rem;
  margin-bottom: 1rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--cream-200);
}
.instructor-portrait {
  width: 100%;
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  background-color: var(--green-700);
  margin-bottom: 1.4rem;
  box-shadow: var(--shadow-sm);
}
.detail-aside dl { margin: 0; }
.detail-aside dt {
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold-600);
  margin-top: 1rem;
  margin-bottom: .25rem;
  font-weight: 600;
}
.detail-aside dt:first-child { margin-top: 0; }
.detail-aside dd { margin: 0; color: var(--ink); font-size: .95rem; }
.detail-aside .btn { margin-top: 1.5rem; width: 100%; justify-content: center; }

.detail-content section { margin-bottom: 3rem; }
.detail-content h2 {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  margin-bottom: 1rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--cream-200);
}
.detail-content h2::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--gold-500);
  border-radius: 2px;
  transform: rotate(45deg);
  flex-shrink: 0;
  align-self: center;
}
.detail-content ul { padding-left: 1.2rem; }
.detail-content ul li { margin: .55rem 0; }

.objectives {
  display: grid;
  gap: 1rem;
}
.objective {
  background: var(--white);
  border: 1px solid var(--cream-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 1rem;
  align-items: start;
}
.objective__num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--gold-600);
  font-weight: 700;
}
.objective h4 { color: var(--green-900); margin-bottom: .25rem; }
.objective p { margin: 0; color: var(--muted); font-size: .95rem; }

.sdg-row { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1rem 0; }
.sdg-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: var(--cream-100);
  border: 1px solid var(--cream-200);
  border-radius: 999px;
  padding: .5rem 1rem;
  font-size: .85rem;
  font-weight: 500;
}
.sdg-pill__num {
  background: var(--gold-500);
  color: var(--ink);
  width: 22px; height: 22px;
  display: inline-grid; place-items: center;
  border-radius: 50%;
  font-size: .75rem;
  font-weight: 700;
}

/* ----- Article cards (insights) ----- */
.article-card {
  background: var(--white);
  border: 1px solid var(--cream-200);
  border-radius: var(--radius);
  padding: 2.2rem;
  transition: all .4s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--gold-500);
}
.article-card__meta {
  display: flex; gap: 1rem;
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold-600);
  font-weight: 600;
}
.article-card h3 { color: var(--green-900); font-size: 1.4rem; line-height: 1.35; }
.article-card__excerpt { color: var(--muted); font-size: .95rem; flex-grow: 1; }
.article-card__author { font-size: .9rem; color: var(--ink); padding-top: 1rem; border-top: 1px solid var(--cream-200); }
.article-card__author strong { color: var(--green-900); }

.article-body {
  max-width: 760px;
  margin: 0 auto;
}
.article-body p { font-size: 1.08rem; line-height: 1.85; }
.article-body h2 { margin-top: 2.5rem; }
.article-body blockquote {
  border-left: 3px solid var(--gold-500);
  margin: 2rem 0;
  padding: .5rem 0 .5rem 1.6rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--green-800);
  font-style: italic;
}

/* ----- Form ----- */
.form-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-info {
  background: var(--green-900);
  color: var(--cream-50);
  border-radius: var(--radius);
  padding: 2.4rem;
  position: sticky;
  top: 110px;
}
.contact-info h3 { color: var(--cream-50); margin-bottom: 1.6rem; }
.contact-info__group { margin-bottom: 1.8rem; }
.contact-info__label {
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: .4rem;
  font-weight: 600;
}
.contact-info__value { color: var(--cream-100); font-size: .95rem; line-height: 1.55; }
.contact-info hr {
  border: 0;
  border-top: 1px solid rgba(201,169,97,.2);
  margin: 1.8rem 0;
}
.contact-info__channels { display: flex; flex-direction: column; gap: .6rem; }
.contact-info__channels a {
  color: var(--cream-100);
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .95rem;
}
.contact-info__channels a:hover { color: var(--gold-400); }

.form {
  background: var(--white);
  border: 1px solid var(--cream-200);
  border-radius: var(--radius);
  padding: 2.6rem;
  box-shadow: var(--shadow-sm);
}
.form__group { margin-bottom: 1.5rem; }
.form__group--inline { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form__legend {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--green-900);
  margin-bottom: 1.2rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--cream-200);
  display: flex;
  align-items: baseline;
  gap: .8rem;
}
.form__legend span {
  font-family: var(--font-sans);
  font-size: .75rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--gold-600);
  font-weight: 600;
}
.form__label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--green-900);
  margin-bottom: .4rem;
}
.form__label .req { color: #c54545; }
.form__input, .form__textarea, .form__select {
  width: 100%;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .95rem;
  color: var(--ink);
  background: var(--cream-50);
  transition: all .2s var(--ease);
}
.form__input:focus, .form__textarea:focus, .form__select:focus {
  outline: none;
  border-color: var(--gold-500);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(201,169,97,.18);
}
.form__textarea { min-height: 120px; resize: vertical; }

.checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: .5rem; }
.check {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .65rem .9rem;
  background: var(--cream-50);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  cursor: pointer;
  transition: all .2s var(--ease);
}
.check:hover { border-color: var(--gold-500); }
.check input { accent-color: var(--green-700); }
.check input:checked + span { color: var(--green-800); font-weight: 600; }

.radio-row { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.radio { display: flex; align-items: center; gap: .4rem; font-size: .92rem; cursor: pointer; }
.radio input { accent-color: var(--green-700); }

.form__submit { width: 100%; justify-content: center; margin-top: 1rem; padding: 1.1rem; font-size: 1.05rem; }
.form__notice {
  font-size: .8rem;
  color: var(--muted);
  text-align: center;
  margin-top: 1rem;
}

/* ----- Form validation states ----- */
.form__required-note {
  font-size: .85rem;
  color: var(--muted);
  margin: 0 0 1.6rem;
}
.form__required-note .req { color: #c54545; font-weight: 700; }
.form__error {
  display: none;
  color: #c54545;
  font-size: .82rem;
  font-weight: 600;
  margin: .45rem 0 0;
}
.has-error .form__error { display: block; }
.has-error .form__input,
.has-error .form__select,
.has-error .form__textarea {
  border-color: #c54545;
  background: #fdf4f3;
  box-shadow: 0 0 0 3px rgba(197, 69, 69, .15);
}
.has-error .form__label { color: #c54545; }
.has-error .checks,
.has-error .radio-row {
  outline: 2px solid #c54545;
  outline-offset: 5px;
  border-radius: var(--radius-sm);
}

/* ----- Footer ----- */
.site-footer {
  background: var(--green-950);
  color: var(--cream-100);
  padding: 5rem 0 2rem;
  border-top: 1px solid rgba(201,169,97,.2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(201,169,97,.12);
}
.footer-brand p {
  color: rgba(243,238,226,.7);
  font-size: .92rem;
  max-width: 320px;
  margin-top: 1.4rem;
}
.footer-col h5 {
  font-family: var(--font-sans);
  font-size: .8rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--gold-400);
  margin: 0 0 1.2rem;
  font-weight: 600;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin: .6rem 0; }
.footer-col a {
  color: rgba(243,238,226,.75);
  font-size: .92rem;
}
.footer-col a:hover { color: var(--gold-400); }
.footer-col p { color: rgba(243,238,226,.75); font-size: .92rem; margin: .5rem 0; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  font-size: .82rem;
  color: rgba(243,238,226,.72);
}

/* ----- Animations ----- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in.delay-1 { transition-delay: .12s; }
.fade-in.delay-2 { transition-delay: .24s; }
.fade-in.delay-3 { transition-delay: .36s; }

/* ----- Responsive ----- */
@media (max-width: 980px) {
  .hero { padding: 120px 0 60px; min-height: auto; }
  .hero__inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero__visual { max-width: 380px; margin: 0 auto; }
  .hero__stats { position: static; }
  .hero__stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-top: 3rem; }

  .cards--3, .cards--4 { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }

  .detail-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .detail-aside { position: static; }

  .form-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-info { position: static; }

  .instructor-card { grid-template-columns: 1fr; }
  .instructor-card__photo { aspect-ratio: 16/10; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }

  .menu-toggle { display: block; }
  .nav {
    position: fixed;
    inset: 78px 0 0 0;
    background: var(--green-950);
    flex-direction: column;
    padding: 2.4rem var(--gutter);
    align-items: stretch;
    gap: 1.4rem;
    transform: translateX(100%);
    transition: transform .35s var(--ease);
    overflow-y: auto;
  }
  .nav.is-open { transform: translateX(0); }
  .nav a { font-size: 1.1rem; padding: .8rem 0; border-bottom: 1px solid rgba(201,169,97,.1); }
  .nav__cta { margin-left: 0; margin-top: 1rem; text-align: center; }

  .form__group--inline { grid-template-columns: 1fr; }
  .checks { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 15px; line-height: 1.65; }
  h1 { font-size: clamp(1.85rem, 7.2vw, 2.4rem); }
  h2 { font-size: clamp(1.45rem, 5.4vw, 1.9rem); }
  h3 { font-size: clamp(1.15rem, 4.2vw, 1.35rem); }
  .lede { font-size: 1rem; }

  .cards--3, .cards--4, .cards--2 { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form { padding: 1.5rem 1.25rem; }
  .form__group { margin-bottom: 1.2rem; }
  .check { font-size: .88rem; padding: .6rem .8rem; }

  .page-hero { padding: 140px 0 60px; }
  .section { padding: 3rem 0; }

  .course-card__body { padding: 1.4rem; }
  .course-card__body h3 { font-size: 1.1rem; }
  .course-card__icon { width: 40px; height: 40px; border-radius: 12px; top: .8rem; right: .8rem; }
  .course-card__icon svg { width: 22px; height: 22px; }
  .course-card__meta { gap: .9rem; flex-wrap: wrap; }

  .badge { font-size: .65rem; padding: .25rem .55rem; }

  .objective { grid-template-columns: 32px 1fr; padding: 1.1rem; gap: .8rem; }
  .objective__num { font-size: 1.25rem; }

  .sdg-row { gap: .45rem; }
  .sdg-pill { font-size: .78rem; padding: .4rem .8rem; }

  .filter-bar { gap: .5rem; margin-bottom: 2rem; }
  .chip { font-size: .82rem; padding: .45rem .9rem; }

  .contact-info { padding: 1.8rem 1.4rem; }

  .article-card { padding: 1.6rem; }

  .site-footer { padding: 3.5rem 0 1.6rem; }
  .footer-grid { padding-bottom: 2rem; gap: 1.6rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .breadcrumb { font-size: .72rem; flex-wrap: wrap; }
}
@media (max-width: 460px) {
  :root { --gutter: 1.1rem; }
  .logo__mark { height: 40px; }
  .logo__name { font-size: 1.18rem; letter-spacing: .16em; }
  .logo__zh { font-size: .58rem; letter-spacing: .12em; }
  .site-header__inner { height: 68px; gap: .8rem; }
  .nav { inset: 68px 0 0 0; }

  .btn { padding: .8rem 1.3rem; font-size: .9rem; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }

  .form__legend { font-size: 1.05rem; }
  .form__input, .form__textarea, .form__select { font-size: .9rem; padding: .75rem .9rem; }

  .course-card__cover { aspect-ratio: 16/9; }
  .course-card__badges { gap: .3rem; max-width: calc(100% - 5rem); }

  .instructor-card__body { padding: 1.4rem; }
  .instructor-card__photo--placeholder { font-size: 3.5rem; }
}