/* ==========================================================================
   RMIT (Royal Melbourne Institute of Technology) Theme
   严格对齐 rmit.edu.au 真实设计
   2026-10-12 v1

   真实设计系统 (从 rmit.edu.au 提取):
   - 主色: navy   #000054 (深蓝紫)
   - 强调: red    #E60028 (RMIT 红, 手标志)
   - 暗红:  #222160 (深红)
   - 文字:  #333333 on white
   - 字体: sans-serif (Helvetica-like)
   - 风格: 拼贴 hero + 15 学科图标网格 + 大数字 stats
   ========================================================================== */

:root {
  --rmit-red:         #E60028;
  --rmit-red-dark:    #c00020;
  --rmit-red-deeper:  #222160;
  --rmit-navy:        #000054;
  --rmit-ink:         #333333;
  --rmit-grey-50:     #F6F6F6;
  --rmit-grey-100:    #ebebeb;
  --rmit-grey-200:    #d6d6d6;
  --rmit-grey-700:    #666;
  --rmit-white:        #FFFFFF;

  --rmit-font-body:   "Helvetica Neue", "Inter", Arial, -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --rmit-font-heading: var(--rmit-font-body);

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

  --rmit-radius:       4px;
  --rmit-radius-lg:    8px;
  --rmit-t:            200ms ease;
  --rmit-container:    1280px;
}

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

body {
  margin: 0;
  font-family: var(--rmit-font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--rmit-ink);
  background: var(--rmit-white);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--rmit-s-s);
  font-family: var(--rmit-font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--rmit-navy);
}
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: 1.375rem; }
p { margin: 0 0 var(--rmit-s-s); }


/* ===== Site Header (RMIT 真实: navy 顶 + 白主条) ===== */
.site-header {
  background: var(--rmit-white);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header__top {
  background: var(--rmit-navy);
  color: var(--rmit-white);
  font-size: 0.8125rem;
}
.site-header__top-inner {
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: 0.4rem var(--rmit-s-s);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rmit-s-s);
}
.site-header__top-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-header__top a {
  color: var(--rmit-white);
  text-decoration: none;
}
.site-header__top a:hover { color: var(--rmit-red); }
.site-header__top-right {
  display: flex;
  align-items: center;
  gap: var(--rmit-s-m);
}
.site-header__main {
  background: var(--rmit-white);
  border-bottom: 1px solid var(--rmit-grey-100);
}
.site-header__main-inner {
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: var(--rmit-s-s);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rmit-s-s);
  flex-wrap: wrap;
}
.site-brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.site-brand__img { height: 40px; width: auto; }
.site-brand__text {
  font-family: var(--rmit-font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--rmit-red);
  letter-spacing: 0.05em;
  margin-left: 0.5rem;
  text-transform: uppercase;
}
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  flex-wrap: wrap;
}
.site-header__nav-item {
  padding: 0.75rem 1rem;
  color: var(--rmit-ink) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--rmit-radius);
}
.site-header__nav-item:hover {
  color: var(--rmit-red) !important;
  background: var(--rmit-grey-50);
  text-decoration: none;
}
.site-header__search {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--rmit-red);
  color: var(--rmit-white);
  border-radius: 50%;
  text-decoration: none;
  font-size: 1rem;
}
.site-header__search:hover { background: var(--rmit-red-dark); color: var(--rmit-white); }


/* ===== Hero (RMIT 真实: 实景照 + 暗蒙版 + 大字) ===== */
.home-hero {
  position: relative;
  min-height: 540px;
  background: var(--rmit-navy);
  overflow: hidden;
}
.home-hero__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.home-hero__overlay {
  position: relative;
  z-index: 2;
  background: linear-gradient(135deg, rgba(0,0,84,0.7) 0%, rgba(34,33,96,0.5) 100%);
  color: var(--rmit-white);
  padding: var(--rmit-s-xxxxl) var(--rmit-s-s);
  min-height: 540px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: var(--rmit-container);
  margin: 0 auto;
}
.home-hero__eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rmit-red);
  margin: 0 0 var(--rmit-s-s);
  padding: 0.3rem 0.75rem;
  background: rgba(255,255,255,0.15);
  border-radius: var(--rmit-radius);
}
.home-hero__title {
  font-family: var(--rmit-font-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--rmit-white);
  margin: 0 0 var(--rmit-s-m);
  text-transform: none;
  max-width: 32rem;
}
.home-hero__sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.92);
  margin: 0 0 var(--rmit-s-l);
  max-width: 36rem;
  line-height: 1.5;
}
.home-hero__actions { display: flex; gap: var(--rmit-s-s); flex-wrap: wrap; }


/* ===== Buttons (RMIT 真实: 圆角小, 红实心 / 白描边) ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  font-family: var(--rmit-font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--rmit-radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--rmit-t);
  text-decoration: none;
  line-height: 1.2;
}
.btn--primary {
  background: var(--rmit-red);
  color: var(--rmit-white);
  border-color: var(--rmit-red);
}
.btn--primary:hover { background: var(--rmit-red-dark); border-color: var(--rmit-red-dark); color: var(--rmit-white); text-decoration: none; }
.btn--secondary {
  background: var(--rmit-navy);
  color: var(--rmit-white);
  border-color: var(--rmit-navy);
}
.btn--secondary:hover { background: var(--rmit-red-deeper); border-color: var(--rmit-red-deeper); color: var(--rmit-white); text-decoration: none; }
.btn--outline {
  background: transparent;
  color: var(--rmit-navy);
  border-color: var(--rmit-navy);
}
.btn--outline:hover { background: var(--rmit-navy); color: var(--rmit-white); text-decoration: none; }
.btn--white {
  background: var(--rmit-white);
  color: var(--rmit-navy);
  border-color: var(--rmit-white);
}
.btn--white:hover { background: var(--rmit-grey-50); color: var(--rmit-navy); text-decoration: none; }


/* ===== Sections ===== */
.section {
  width: 100%;
  padding: var(--rmit-s-xxxxl) var(--rmit-s-s);
}
.section--white { background: var(--rmit-white); }
.section--grey { background: var(--rmit-grey-50; }
.section--red { background: var(--rmit-red); color: var(--rmit-white); }
.section--red h1, .section--red h2, .section--red h3 { color: var(--rmit-white); }
.section--navy { background: var(--rmit-navy); color: var(--rmit-white); }
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--rmit-white); }
.section__container { max-width: var(--rmit-container); margin: 0 auto; }
.section__head { margin-bottom: var(--rmit-s-xl); }
.section__head--center { text-align: center; }
.section__title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--rmit-navy);
  margin: 0 0 var(--rmit-s-s);
}
.section--navy .section__title { color: var(--rmit-white); }
.section__sub {
  font-size: 1.0625rem;
  color: var(--rmit-ink);
  max-width: 48rem;
  margin: 0;
}
.section--navy .section__sub { color: rgba(255,255,255,0.9); }


/* ===== 学科 3 列 5 行网格 (RMIT 真实) ===== */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--rmit-s-s);
  background: var(--rmit-white);
  border: 1px solid var(--rmit-grey-200);
  border-radius: var(--rmit-radius);
  padding: var(--rmit-s-l);
  max-width: var(--rmit-container);
  margin: -2.5rem auto 0;
  position: relative;
  z-index: 5;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.subject-item {
  display: flex;
  align-items: center;
  gap: var(--rmit-s-s);
  padding: 0.5rem 0.75rem;
  text-decoration: none;
  color: var(--rmit-navy);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--rmit-radius);
  transition: background var(--rmit-t);
}
.subject-item:hover { background: var(--rmit-grey-50); color: var(--rmit-navy); text-decoration: none; }
.subject-item__icon {
  width: 32px; height: 32px;
  background: var(--rmit-red);
  color: var(--rmit-white);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
}
.subject-item__name { color: var(--rmit-navy); }


/* ===== 3 列大数字 stats (RMIT 真实) ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--rmit-s-xl);
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: var(--rmit-s-xxl) var(--rmit-s-s);
  text-align: center;
}
.stat__num {
  font-family: var(--rmit-font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--rmit-red);
  line-height: 1;
  margin: 0 0 0.5rem;
}
.stat__label {
  font-size: 0.9375rem;
  color: var(--rmit-ink);
  margin: 0;
  font-weight: 500;
}
.stat__source {
  font-size: 0.75rem;
  color: var(--rmit-grey-700);
  margin: 0.5rem 0 0;
}


/* ===== 路径/转移 cards (2 张并排) ===== */
.path-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--rmit-s-m);
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: 0 var(--rmit-s-s);
}
.path-card {
  position: relative;
  display: block;
  border-radius: var(--rmit-radius);
  overflow: hidden;
  text-decoration: none;
  background: var(--rmit-grey-50);
  aspect-ratio: 4/3;
}
.path-card img {
  width: 100%; height: 100%; object-fit: cover;
}
.path-card__overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 100%);
  color: var(--rmit-white);
  padding: var(--rmit-s-l);
}
.path-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
}
.path-card__body {
  font-size: 0.875rem;
  opacity: 0.9;
  margin: 0;
}


/* ===== 红条 Apply CTA (RMIT 真实) ===== */
.apply-cta {
  background: var(--rmit-red);
  color: var(--rmit-white);
  padding: var(--rmit-s-l) var(--rmit-s-s);
}
.apply-cta__inner {
  max-width: var(--rmit-container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rmit-s-m);
  flex-wrap: wrap;
}
.apply-cta__text {
  font-family: var(--rmit-font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--rmit-white);
  margin: 0;
}
.apply-cta__body {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.95);
  margin: 0.5rem 0 0;
}


/* ===== 4 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--rmit-s-m);
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: 0 var(--rmit-s-s);
}
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--rmit-white);
  border: 1px solid var(--rmit-grey-200);
  border-radius: var(--rmit-radius);
  padding: var(--rmit-s-m);
  text-decoration: none;
  color: var(--rmit-ink);
  transition: all var(--rmit-t);
}
.card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,84,0.08); color: var(--rmit-ink); text-decoration: none; }
.card__icon {
  width: 48px; height: 48px;
  background: var(--rmit-red);
  color: var(--rmit-white);
  border-radius: var(--rmit-radius);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
  margin-bottom: var(--rmit-s-s);
}
.card__title {
  font-family: var(--rmit-font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--rmit-navy);
  margin: 0 0 0.5rem;
}
.card__body {
  font-size: 0.875rem;
  color: var(--rmit-ink);
  line-height: 1.5;
  margin: 0;
}


/* ===== News 3-col ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--rmit-s-m);
}
.news-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--rmit-ink);
  background: var(--rmit-white);
  border: 1px solid var(--rmit-grey-200);
  border-radius: var(--rmit-radius);
  overflow: hidden;
  transition: all var(--rmit-t);
}
.news-card:hover { transform: translateY(-2px); color: var(--rmit-ink); text-decoration: none; }
.news-card__media {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: var(--rmit-grey-50);
}
.news-card__body { padding: var(--rmit-s-m); }
.news-card__date {
  font-size: 0.75rem;
  color: var(--rmit-red);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 0.5rem;
}
.news-card__title {
  font-family: var(--rmit-font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--rmit-navy);
  line-height: 1.3;
  margin: 0 0 var(--rmit-s-s);
}
.news-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--rmit-red);
  text-decoration: underline;
  text-underline-offset: 3px;
  margin-top: auto;
}


/* ===== Page Hero (内页) ===== */
.page-hero {
  background: var(--rmit-navy);
  color: var(--rmit-white);
  padding: var(--rmit-s-xl) var(--rmit-s-s);
}
.page-hero__container { max-width: var(--rmit-container); margin: 0 auto; }
.page-hero__breadcrumb {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  margin: 0 0 var(--rmit-s-s);
}
.page-hero__breadcrumb a { color: var(--rmit-white); }
.page-hero__title {
  font-family: var(--rmit-font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--rmit-white);
  margin: 0 0 var(--rmit-s-s);
}
.page-hero__sub {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.88);
  max-width: 48rem;
  margin: 0;
}


/* ===== Content (prose) ===== */
.page-content {
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding: var(--rmit-s-xxxxl) var(--rmit-s-s);
}
.prose {
  max-width: 56rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--rmit-ink);
}
.prose h2 {
  font-size: 1.625rem;
  color: var(--rmit-navy);
  margin: var(--rmit-s-xl) 0 var(--rmit-s-s);
  border-bottom: 3px solid var(--rmit-red);
  padding-bottom: 0.5rem;
  display: inline-block;
}
.prose h3 { font-size: 1.25rem; color: var(--rmit-navy); margin: var(--rmit-s-l) 0 var(--rmit-s-xs); }
.prose a { color: var(--rmit-navy); text-decoration: underline; }
.prose blockquote {
  border-left: 4px solid var(--rmit-red);
  padding: 0.5rem var(--rmit-s-m);
  margin: var(--rmit-s-m) 0;
  background: var(--rmit-grey-50);
  font-style: italic;
}


/* ===== Footer (RMIT 真实: navy + 4 列) ===== */
.site-footer {
  background: var(--rmit-navy);
  color: var(--rmit-white);
  padding: var(--rmit-s-xxxxl) var(--rmit-s-s) var(--rmit-s-l);
}
.site-footer__grid {
  max-width: var(--rmit-container);
  margin: 0 auto var(--rmit-s-xl);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--rmit-s-l);
}
.site-footer__col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--rmit-white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 var(--rmit-s-s);
}
.site-footer__col p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.85);
  margin: 0 0 var(--rmit-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(--rmit-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(--rmit-red); text-decoration: underline; }
.site-footer__network {
  max-width: var(--rmit-container);
  margin: 0 auto var(--rmit-s-l);
  padding: var(--rmit-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(--rmit-s-xs);
}
.site-footer__network ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--rmit-s-xs) var(--rmit-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(--rmit-red); text-decoration: underline; }
.site-footer__bottom {
  max-width: var(--rmit-container);
  margin: 0 auto;
  padding-top: var(--rmit-s-l);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--rmit-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) {
  .subject-grid { grid-template-columns: repeat(2, 1fr); }
  .path-grid { grid-template-columns: 1fr; }
  .card-grid, .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .news-grid, .stats-row { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .site-header__top-inner { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .site-header__main-inner { padding: 0.5rem var(--rmit-s-s); }
  .subject-grid, .card-grid, .card-grid--4, .news-grid, .stats-row, .site-footer__grid { grid-template-columns: 1fr; }
  .section { padding: var(--rmit-s-xl) var(--rmit-s-s); }
  .home-hero__title { font-size: 2rem; }
  .apply-cta__inner { flex-direction: column; align-items: flex-start; }
}