/* ==========================================================================
   Batchelor Institute Theme — 严格对齐 batchelor.edu.au 真实设计
   2026-10-12

   真实设计系统 (从 batchelor.edu.au/dist/assets/app-*.css 提取):
   - --bi-terracotta:  #cd4326  主色
   - --bi-orange-red:  #df5a48  强调
   - --bi-lime:        #74b900  成功/绿色 accent
   - --bi-navy:        #163345  深色背景
   - --bi-ink:         #434748  正文
   - --bi-grey:        #7b7b7b  次要文字
   - 标题: Amelia-Rounded (商业字体, fallback to rounded sans)
   - 正文: TextaNarrowAlt (商业字体, fallback to system narrow sans)
   - 风格: 大圆角, 圆点纹理背景, 居中布局, 温暖色彩
   ========================================================================== */

:root {
  /* Brand */
  --bi-terracotta:    #cd4326;
  --bi-orange-red:    #df5a48;
  --bi-lime:          #74b900;
  --bi-navy:          #163345;
  --bi-ink:           #434748;
  --bi-grey:          #7b7b7b;
  --bi-grey-50:       #ebebeb;
  --bi-grey-100:      #f5f5f5;
  --bi-white:         #ffffff;
  --bi-black:         #1a1a1a;

  /* Type (commercial fonts with strong fallback chain) */
  --bi-font-heading:  "Amelia-Rounded", "Nunito", "Quicksand", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --bi-font-body:     "TextaNarrowAlt", "Barlow Condensed", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;

  /* Spacing */
  --bi-s-xxs: .25rem; --bi-s-xs: .5rem;  --bi-s-s:  1rem;
  --bi-s-m:  1.5rem; --bi-s-l:  2rem;   --bi-s-xl: 2.5rem;
  --bi-s-xxl: 3rem;  --bi-s-xxxl: 4rem;  --bi-s-xxxxl: 5rem;

  --bi-radius:        8px;
  --bi-radius-lg:     16px;
  --bi-radius-pill:   999px;
  --bi-t:             200ms ease;
  --bi-container:     1320px;
}

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

body {
  margin: 0;
  font-family: var(--bi-font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--bi-ink);
  background: var(--bi-white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--bi-terracotta); text-decoration: none; transition: color var(--bi-t); }
a:hover { color: var(--bi-orange-red); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--bi-s-s);
  font-family: var(--bi-font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--bi-navy);
}
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
p { margin: 0 0 var(--bi-s-s); }
ul, ol { margin: 0 0 var(--bi-s-s); padding-left: 1.5rem; }


/* ===== Site Header (Batchelor: 暗条 + 4 utility 链接 + Enquire/Enrol CTA) ===== */
.site-header {
  background: var(--bi-navy);
  color: var(--bi-white);
  position: relative;
}
.site-header__top {
  background: var(--bi-navy);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.site-header__top-inner {
  max-width: var(--bi-container);
  margin: 0 auto;
  padding: 0.75rem var(--bi-s-s);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bi-s-s);
  flex-wrap: wrap;
}
.site-brand { display: inline-flex; align-items: center; gap: 0.5rem; text-decoration: none; }
.site-brand__img { height: 40px; width: auto; filter: brightness(0) invert(1); }
.site-header__util {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  flex-wrap: wrap;
}
.site-header__util a {
  color: var(--bi-white);
  text-decoration: none;
  font-weight: 500;
}
.site-header__util a:hover { color: var(--bi-orange-red); text-decoration: underline; }
.site-header__cta-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}
.btn--enquire {
  background: transparent;
  color: var(--bi-white);
  border: 1.5px solid var(--bi-white);
  padding: 0.5rem 1.25rem;
  border-radius: var(--bi-radius-pill);
  font-weight: 600;
  text-decoration: none;
}
.btn--enquire:hover { background: var(--bi-white); color: var(--bi-navy); text-decoration: none; }
.site-header__main {
  background: var(--bi-navy);
  border-top: 1px solid rgba(255,255,255,0.08);
}
.site-header__main-inner {
  max-width: var(--bi-container);
  margin: 0 auto;
  padding: 0 var(--bi-s-s);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
}
.site-header__nav-item {
  padding: 0.875rem 1rem;
  color: var(--bi-white);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--bi-radius);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.site-header__nav-item:hover { background: rgba(255,255,255,0.08); color: var(--bi-white); text-decoration: none; }
.site-header__nav-item::after { content: "▾"; font-size: 0.7em; opacity: 0.6; }
.site-header__search {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--bi-white);
  border-radius: 50%;
  text-decoration: none;
  background: rgba(255,255,255,0.1);
  font-size: 1rem;
}
.site-header__search:hover { background: rgba(255,255,255,0.2); color: var(--bi-white); text-decoration: none; }


/* ===== Hero (Batchelor 真实: 红橙渐变 + 大字白标题 + 圆点纹理 + 右半实景照) ===== */
.home-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 540px;
  background: linear-gradient(135deg, var(--bi-terracotta) 0%, var(--bi-orange-red) 100%);
  color: var(--bi-white);
  overflow: hidden;
}
.home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.12) 1.5px, transparent 1.5px);
  background-size: 14px 14px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 1;
}
.home-hero__image {
  position: absolute;
  inset: 0 0 0 50%;
  width: 50%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.home-hero__overlay {
  position: relative;
  z-index: 2;
  padding: var(--bi-s-xxxxl) var(--bi-s-xxl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  grid-column: 1;
}
.home-hero__eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bi-white);
  margin: 0 0 var(--bi-s-s);
  padding: 0.4rem 0.75rem;
  background: rgba(0,0,0,0.2);
  border-radius: var(--bi-radius);
}
.home-hero__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--bi-white);
  margin: 0 0 var(--bi-s-m);
}
.home-hero__sub {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.95);
  max-width: 28rem;
  margin: 0 0 var(--bi-s-l);
  line-height: 1.5;
}
.home-hero__actions { display: flex; gap: var(--bi-s-s); flex-wrap: wrap; }


/* ===== Buttons (Batchelor: 圆角大, dark + 描边) ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--bi-font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--bi-radius-pill);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--bi-t);
  text-decoration: none;
  line-height: 1.2;
}
.btn--primary {
  background: var(--bi-navy);
  color: var(--bi-white);
  border-color: var(--bi-navy);
}
.btn--primary:hover { background: #0e2230; color: var(--bi-white); text-decoration: none; }
.btn--secondary {
  background: var(--bi-terracotta);
  color: var(--bi-white);
  border-color: var(--bi-terracotta);
}
.btn--secondary:hover { background: var(--bi-orange-red); border-color: var(--bi-orange-red); color: var(--bi-white); text-decoration: none; }
.btn--outline {
  background: transparent;
  color: var(--bi-white);
  border-color: var(--bi-white);
}
.btn--outline:hover { background: var(--bi-white); color: var(--bi-terracotta); text-decoration: none; }
.btn--ghost {
  background: transparent;
  color: var(--bi-terracotta);
  border-color: var(--bi-terracotta);
}
.btn--ghost:hover { background: var(--bi-terracotta); color: var(--bi-white); text-decoration: none; }


/* ===== Sections ===== */
.section {
  width: 100%;
  padding: var(--bi-s-xxxxl) var(--bi-s-s);
}
.section--white { background: var(--bi-white); }
.section--grey { background: var(--bi-grey-100); }
.section--navy { background: var(--bi-navy); color: var(--bi-white); }
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--bi-white); }
.section__container { max-width: var(--bi-container); margin: 0 auto; }
.section__head { margin-bottom: var(--bi-s-xl); }
.section__head--center { text-align: center; }
.section__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--bi-navy);
  margin: 0 0 var(--bi-s-s);
}
.section--navy .section__title { color: var(--bi-white); }
.section__sub {
  font-size: 1.0625rem;
  color: var(--bi-grey);
  max-width: 48rem;
  margin: 0;
}
.section--navy .section__sub { color: rgba(255,255,255,0.85); }


/* ===== Category Cards (Batchelor 真实: 4 个彩色圆角方块, 居中文字) ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--bi-s-m);
}
.category-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 280px;
  padding: var(--bi-s-l);
  border-radius: var(--bi-radius-lg);
  color: var(--bi-white);
  text-decoration: none;
  overflow: hidden;
  transition: transform var(--bi-t);
}
.category-card:hover { transform: translateY(-4px); text-decoration: none; color: var(--bi-white); }
.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.18) 1.5px, transparent 1.5px);
  background-size: 12px 12px;
  opacity: 0.6;
  pointer-events: none;
}
.category-card--terracotta { background: var(--bi-terracotta); }
.category-card--navy { background: var(--bi-navy); }
.category-card--orange { background: var(--bi-orange-red); }
.category-card--lime { background: var(--bi-lime); color: var(--bi-navy); }
.category-card--lime:hover { color: var(--bi-navy); }
.category-card__title {
  font-family: var(--bi-font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.25;
  color: inherit;
  margin: 0 0 var(--bi-s-m);
  position: relative;
  z-index: 1;
}
.category-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  position: relative;
  z-index: 1;
}


/* ===== Mission Pillars (Batchelor 真实: 3-col, 数字 + 标题 + 描述) ===== */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bi-s-xl);
}
.pillar__title {
  font-family: var(--bi-font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bi-terracotta);
  margin: 0 0 var(--bi-s-s);
}
.pillar__body {
  font-size: 0.9375rem;
  color: var(--bi-ink);
  line-height: 1.6;
  margin: 0;
}


/* ===== Feature Cards (通用 3-col) ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bi-s-m);
}
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--bi-white);
  border: 1px solid var(--bi-grey-50);
  border-radius: var(--bi-radius);
  padding: var(--bi-s-m);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: all var(--bi-t);
}
.card:hover { border-color: var(--bi-terracotta); box-shadow: 0 4px 12px rgba(205,67,38,0.1); color: inherit; text-decoration: none; }
.card__title {
  font-family: var(--bi-font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--bi-navy);
  margin: 0 0 0.5rem;
}
.card__body { font-size: 0.9375rem; color: var(--bi-ink); line-height: 1.5; flex: 1; margin: 0; }
.card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: var(--bi-s-s);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--bi-terracotta);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.card__cta:hover { color: var(--bi-orange-red); }


/* ===== Event Strip (深红) ===== */
.event-strip {
  background: var(--bi-terracotta);
  color: var(--bi-white);
  padding: var(--bi-s-l) var(--bi-s-s);
}
.event-strip__inner {
  max-width: var(--bi-container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bi-s-m);
  flex-wrap: wrap;
}
.event-strip__title {
  font-family: var(--bi-font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bi-white);
  margin: 0;
}
.event-strip__link { color: var(--bi-white); text-decoration: underline; font-weight: 700; }
.event-strip__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bi-white);
  color: var(--bi-terracotta);
  border-radius: 50%;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
}
.event-strip__arrow:hover { background: var(--bi-navy); color: var(--bi-white); }


/* ===== Page Hero (内页) ===== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, var(--bi-terracotta) 0%, var(--bi-orange-red) 100%);
  color: var(--bi-white);
  padding: var(--bi-s-xxxxl) var(--bi-s-s);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.12) 1.5px, transparent 1.5px);
  background-size: 14px 14px;
  opacity: 0.5;
  pointer-events: none;
}
.page-hero__container { max-width: var(--bi-container); margin: 0 auto; position: relative; z-index: 1; }
.page-hero__breadcrumb {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.85);
  margin: 0 0 var(--bi-s-s);
}
.page-hero__breadcrumb a { color: var(--bi-white); text-decoration: underline; }
.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--bi-white);
  margin: 0 0 var(--bi-s-s);
  line-height: 1.15;
}
.page-hero__sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.95);
  max-width: 48rem;
  margin: 0;
}


/* ===== Content (prose) ===== */
.page-content {
  max-width: var(--bi-container);
  margin: 0 auto;
  padding: var(--bi-s-xxxxl) var(--bi-s-s);
}
.prose {
  max-width: 56rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--bi-ink);
}
.prose h2 {
  font-size: 1.75rem;
  color: var(--bi-navy);
  margin: var(--bi-s-xl) 0 var(--bi-s-s);
  font-family: var(--bi-font-heading);
}
.prose h3 {
  font-size: 1.25rem;
  color: var(--bi-navy);
  margin: var(--bi-s-l) 0 var(--bi-s-xs);
  font-family: var(--bi-font-heading);
}
.prose a { color: var(--bi-terracotta); text-decoration: underline; }
.prose ul, .prose ol { margin: 0 0 var(--bi-s-s); padding-left: 1.5rem; }
.prose blockquote {
  border-left: 4px solid var(--bi-terracotta);
  padding: 0.5rem var(--bi-s-m);
  margin: var(--bi-s-m) 0;
  background: var(--bi-grey-100);
  font-style: italic;
}


/* ===== Stats ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--bi-s-l);
  text-align: center;
}
.stat__num {
  font-family: var(--bi-font-heading);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--bi-terracotta);
  line-height: 1;
  margin: 0 0 var(--bi-s-xs);
}
.stat__label {
  font-size: 0.9375rem;
  color: var(--bi-grey);
  margin: 0;
}


/* ===== Footer (Batchelor: 深色 + 4 列) ===== */
.site-footer {
  background: var(--bi-navy);
  color: var(--bi-white);
  padding: var(--bi-s-xxxxl) var(--bi-s-s) var(--bi-s-l);
}
.site-footer__grid {
  max-width: var(--bi-container);
  margin: 0 auto var(--bi-s-xl);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--bi-s-l);
}
.site-footer__col h4 {
  font-family: var(--bi-font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--bi-white);
  margin: 0 0 var(--bi-s-s);
}
.site-footer__col p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.75);
  margin: 0 0 var(--bi-s-xs);
  line-height: 1.5;
}
.site-footer__col ul { list-style: none; padding: 0; margin: 0; }
.site-footer__col li { margin: 0 0 var(--bi-s-xs); }
.site-footer__col a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.875rem;
}
.site-footer__col a:hover { color: var(--bi-orange-red); text-decoration: underline; }
.site-footer__network {
  max-width: var(--bi-container);
  margin: 0 auto var(--bi-s-l);
  padding: var(--bi-s-m) 0;
  border-top: 1px solid rgba(255,255,255,0.15);
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.site-footer__network-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.1em;
  margin: 0 0 var(--bi-s-xs);
}
.site-footer__network ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--bi-s-xs) var(--bi-s-m);
}
.site-footer__network a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.8125rem;
}
.site-footer__network a:hover { color: var(--bi-orange-red); text-decoration: underline; }
.site-footer__bottom {
  max-width: var(--bi-container);
  margin: 0 auto;
  padding-top: var(--bi-s-l);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--bi-s-s);
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.7);
}
.site-footer__bottom a { color: rgba(255,255,255,0.85); text-decoration: underline; }


/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .site-header__nav { display: none; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid, .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .pillars { grid-template-columns: 1fr; gap: var(--bi-s-l); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
  .home-hero { grid-template-columns: 1fr; min-height: 440px; }
  .home-hero__image { position: relative; inset: auto; width: 100%; height: 240px; }
  .home-hero__overlay { padding: var(--bi-s-l); }
}
@media (max-width: 640px) {
  .site-header__top-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .site-header__util { gap: 0.75rem; }
  .category-grid, .card-grid, .card-grid--2, .card-grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .section { padding: var(--bi-s-xl) var(--bi-s-s); }
  .home-hero__title { font-size: 1.875rem; }
  .event-strip__inner { flex-direction: column; align-items: flex-start; }
}