/*
 * UAF Theme — 阿拉斯加大学费尔班克斯分校中文站
 * America's Arctic University — UAF
 * Theme URI: https://uaf.intsch.cn
 * Author: Gobob AI (intsch.cn)
 * Description: UAF 主题 — 蓝+黄双色, 严格对齐 uaf.edu 官网设计语言
 * Version: 1.0.0
 * Tags: multilingual, education, indigenous, arctic
 */

/* ==========================================================================
   设计 token — :root CSS 变量 (UAF 品牌色)
   ========================================================================== */

:root {
  --uaf-blue:        #1a3a6e;
  --uaf-blue-dark:   #0f2447;
  --uaf-blue-light:  #2c4f8b;
  --uaf-yellow:      #FFD500;
  --uaf-yellow-dark: #c9ab00;
  --uaf-white:       #ffffff;
  --uaf-gray-50:     #f5f6f8;
  --uaf-gray-100:    #e8eaee;
  --uaf-gray-200:    #c5c9d1;
  --uaf-gray-700:    #4a4a4a;
  --uaf-gray-900:    #1a1a1a;

  --font-serif:      'Source Serif Pro', 'Noto Serif SC', Georgia, serif;
  --font-sans:       'Source Sans Pro', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-display:    'Rockwell', 'Roboto Slab', 'Source Serif Pro', Georgia, serif;

  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.5rem;   --space-6: 2rem;
  --space-8: 3rem;     --space-10: 4rem;    --space-12: 6rem;
  --space-16: 8rem;    --space-20: 10rem;

  --transition: 180ms ease;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--uaf-gray-900);
  background: var(--uaf-white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; font-family: var(--font-display); }
ul, ol { margin: 0; padding: 0; list-style: none; }


/* ===== Header (官网: 蓝色 + 黄色细线) ===== */
.site-header {
  background: var(--uaf-blue);
  color: var(--uaf-white);
  position: relative;
  border-bottom: 4px solid var(--uaf-yellow);
}
.site-header__top {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  color: var(--uaf-white);
}
.site-brand__mark {
  width: 56px;
  height: 56px;
  background: var(--uaf-yellow);
  color: var(--uaf-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}
.site-brand__text { line-height: 1.1; }
.site-brand__text small {
  display: block;
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--uaf-yellow);
}

.site-header__audience {
  display: flex;
  gap: var(--space-4);
  font-size: 0.875rem;
}
.site-header__audience a {
  color: var(--uaf-white);
  opacity: 0.9;
  transition: opacity var(--transition);
}
.site-header__audience a:hover { opacity: 1; }

.site-nav {
  background: var(--uaf-blue-dark);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.site-nav__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.site-nav__item {
  color: var(--uaf-white);
  padding: var(--space-4) 0;
  font-size: 0.9375rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  border-bottom: 3px solid transparent;
  transition: border-color var(--transition);
}
.site-nav__item:hover, .site-nav__item.is-current {
  border-bottom-color: var(--uaf-yellow);
}


/* ===== Hero (官网: 全屏照片 + 左下黄字) ===== */
.hero {
  position: relative;
  min-height: 70vh;
  background-color: var(--uaf-blue);
  background-image: linear-gradient(135deg, rgba(26,58,110,0.55), rgba(26,58,110,0.75)), url('<?php echo get_template_directory_uri(); ?>/assets/hero.jpg');
  background-size: cover;
  background-position: center;
  color: var(--uaf-white);
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  text-align: left;
  padding: var(--space-16) var(--space-8);
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background-image:
    linear-gradient(0deg, transparent 49%, var(--uaf-yellow) 49%, var(--uaf-yellow) 51%, transparent 51%),
    linear-gradient(90deg, transparent 49%, var(--uaf-yellow) 49%, var(--uaf-yellow) 51%, transparent 51%);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
}
.hero__content { position: relative; z-index: 1; max-width: 48rem; }
.hero__eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--uaf-yellow);
  margin: 0 0 var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: rgba(0,0,0,0.25);
  border-left: 4px solid var(--uaf-yellow);
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  font-style: italic;
  line-height: 1.05;
  color: var(--uaf-yellow);
  margin: 0 0 var(--space-4);
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
  letter-spacing: -0.02em;
}
.hero__subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.125rem, 1.5vw, 1.375rem);
  color: var(--uaf-white);
  margin: 0 0 var(--space-8);
  max-width: 40rem;
}
.hero__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}


/* ===== Buttons (官网: 方角黄色) ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 0;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn--primary {
  background: var(--uaf-yellow);
  color: var(--uaf-blue);
  border-color: var(--uaf-yellow);
}
.btn--primary:hover { background: var(--uaf-yellow-dark); border-color: var(--uaf-yellow-dark); }
.btn--secondary {
  background: transparent;
  color: var(--uaf-white);
  border-color: var(--uaf-white);
}
.btn--secondary:hover { background: var(--uaf-white); color: var(--uaf-blue); }
.btn--outline {
  background: transparent;
  color: var(--uaf-blue);
  border-color: var(--uaf-blue);
}
.btn--outline:hover { background: var(--uaf-blue); color: var(--uaf-white); }


/* ===== Section (官网: 白底 + 蓝标题) ===== */
.section {
  width: 100%;
  padding: var(--space-16) var(--space-8);
}
.section--grey { background: var(--uaf-gray-50); }
.section--blue { background: var(--uaf-blue); color: var(--uaf-white); }
.section--yellow { background: var(--uaf-yellow); color: var(--uaf-blue); }
.section__head {
  max-width: 1280px;
  margin: 0 auto var(--space-10);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: flex-end;
  gap: var(--space-6);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--uaf-blue);
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.section--blue .section__title { color: var(--uaf-yellow); }
.section--yellow .section__title { color: var(--uaf-blue); }
.section__sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--uaf-gray-700);
  margin: var(--space-3) 0 0;
  max-width: 40rem;
}
.section--blue .section__sub { color: rgba(255,255,255,0.9); }
.section--yellow .section__sub { color: var(--uaf-blue); }
.section__aside .btn { font-size: 0.875rem; }


/* ===== Stats ===== */
.stats {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}
.stat { display: flex; flex-direction: column; gap: var(--space-2); }
.stat__number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--uaf-yellow);
  line-height: 1;
}
.section--yellow .stat__number { color: var(--uaf-blue); }
.stat__label {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  color: var(--uaf-white);
  letter-spacing: 0.05em;
}


/* ===== Cards ===== */
.card-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--uaf-white);
  border: 1px solid var(--uaf-gray-100);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}
.card:hover {
  border-color: var(--uaf-blue);
  box-shadow: 0 4px 16px rgba(26,58,110,0.12);
  transform: translateY(-2px);
}
.card--blue {
  background: var(--uaf-blue);
  color: var(--uaf-white);
  border-color: var(--uaf-blue);
}
.card--featured { border-top: 4px solid var(--uaf-yellow); }
.card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--uaf-blue);
  background: var(--uaf-yellow);
  padding: var(--space-1) var(--space-3);
  align-self: flex-start;
}
.card--blue .card__tag { background: var(--uaf-yellow); color: var(--uaf-blue); }
.card__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--uaf-blue);
  margin: 0;
  line-height: 1.2;
}
.card--blue .card__title { color: var(--uaf-yellow); }
.card__body {
  font-size: 0.9375rem;
  color: var(--uaf-gray-700);
  line-height: 1.5;
  flex: 1;
}
.card--blue .card__body { color: rgba(255,255,255,0.9); }
.card__cta {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--uaf-blue);
  margin-top: var(--space-3);
}
.card--blue .card__cta { color: var(--uaf-yellow); }


/* ===== Footer ===== */
.site-footer {
  background: var(--uaf-blue);
  color: var(--uaf-white);
  padding: var(--space-12) var(--space-8) var(--space-6);
  border-top: 4px solid var(--uaf-yellow);
}
.site-footer__grid {
  max-width: 1280px;
  margin: 0 auto var(--space-8);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}
.site-footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--uaf-yellow);
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.site-footer__col p,
.site-footer__col li {
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0 0 var(--space-2);
}
.site-footer__col a {
  color: var(--uaf-white);
  text-decoration: underline;
  text-decoration-color: rgba(255,213,0,0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}
.site-footer__col a:hover { text-decoration-color: var(--uaf-yellow); }
.site-footer__address {
  font-style: italic;
  color: rgba(255,255,255,0.85);
}
.site-footer__bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255,255,255,0.15);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.7);
}
.site-footer__legal a { color: var(--uaf-yellow); }


/* ===== Page Hero (内页) ===== */
.page-hero {
  background: var(--uaf-blue);
  color: var(--uaf-white);
  padding: var(--space-12) var(--space-8);
  border-bottom: 4px solid var(--uaf-yellow);
}
.page-hero--yellow { background: var(--uaf-yellow); color: var(--uaf-blue); }
.page-hero--gradient { background: linear-gradient(180deg, var(--uaf-blue) 0%, var(--uaf-blue-dark) 100%); }
.page-hero__inner { max-width: 1280px; margin: 0 auto; }
.page-hero__breadcrumb {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 var(--space-4);
  color: rgba(255,255,255,0.7);
}
.page-hero--yellow .page-hero__breadcrumb { color: var(--uaf-blue); }
.page-hero__breadcrumb a { color: var(--uaf-yellow); }
.page-hero--yellow .page-hero__breadcrumb a { color: var(--uaf-blue); }
.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--uaf-yellow);
  margin: 0 0 var(--space-3);
  line-height: 1.1;
}
.page-hero--yellow .page-hero__title { color: var(--uaf-blue); }
.page-hero__sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  max-width: 40rem;
  margin: 0;
}
.page-hero--yellow .page-hero__sub { color: var(--uaf-blue); }


/* ===== Content ===== */
.page-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-8);
}
.prose {
  max-width: 56rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--uaf-gray-900);
}
.prose h2 {
  font-family: var(--font-display);
  font-size: 1.875rem;
  color: var(--uaf-blue);
  margin: var(--space-8) 0 var(--space-3);
}
.prose h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--uaf-blue);
  margin: var(--space-6) 0 var(--space-2);
}
.prose p { margin: 0 0 var(--space-4); }
.prose a { color: var(--uaf-blue); text-decoration: underline; text-decoration-color: var(--uaf-yellow); text-underline-offset: 3px; }
.prose ul, .prose ol { margin: 0 0 var(--space-4) var(--space-6); }
.prose li { margin: 0 0 var(--space-2); }
.prose blockquote {
  border-left: 4px solid var(--uaf-yellow);
  padding: var(--space-3) var(--space-5);
  margin: var(--space-5) 0;
  font-style: italic;
  color: var(--uaf-gray-700);
  background: var(--uaf-gray-50);
}


/* ===== WP required: align wide + post content ===== */
.alignwide { max-width: 1280px; margin-left: auto; margin-right: auto; }
.alignfull { max-width: 100%; width: 100%; }
.entry-content { margin: 0 auto; }


/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .site-header__top { flex-wrap: wrap; gap: var(--space-3); }
  .site-nav__inner { flex-wrap: wrap; gap: var(--space-3); }
  .site-nav__item { font-size: 0.875rem; padding: var(--space-3) 0; }
  .hero { min-height: 60vh; padding: var(--space-12) var(--space-5); }
  .section__head { grid-template-columns: 1fr; gap: var(--space-3); }
  .card-grid, .card-grid--2, .card-grid--4 { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: var(--space-5); }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .site-header__top { padding: var(--space-2) var(--space-4); flex-direction: column; align-items: flex-start; }
  .site-brand { font-size: 1rem; }
  .site-brand__mark { width: 44px; height: 44px; font-size: 1.25rem; }
  .site-header__audience { font-size: 0.75rem; flex-wrap: wrap; gap: var(--space-2); }
  .site-nav__inner { overflow-x: auto; flex-wrap: nowrap; }
  .site-nav__item { white-space: nowrap; font-size: 0.8125rem; }
  .hero { min-height: 80vh; padding: var(--space-10) var(--space-4); }
  .hero::after { width: 120px; height: 120px; background-size: 30px 30px; }
  .hero__actions { flex-direction: column; width: 100%; }
  .hero__actions .btn { width: 100%; }
  .section { padding: var(--space-10) var(--space-4); }
  .card-grid, .card-grid--2, .card-grid--4 { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
}


/* ==========================================================================
   站群内链区 (footer__network)
   2026-10-11
   ========================================================================== */

.site-footer__network {
  max-width: 96rem;
  margin: var(--space-6) auto 0;
  padding: var(--space-5) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
}
.site-footer__network-label {
  font-family: var(--font-cocon);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--uaf-yellow);
  margin: 0;
  flex-shrink: 0;
}
.site-footer__network-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-footer__network-list li {
  font-family: var(--font-cocon);
  font-size: var(--text-xs);
  color: var(--uaf-whalebone);
}
.site-footer__network-list a {
  color: var(--uaf-whalebone);
  text-decoration: underline;
  text-decoration-color: rgba(255, 213, 0, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition);
}
.site-footer__network-list a:hover { text-decoration-color: var(--uaf-yellow); }

@media (max-width: 640px) {
  .site-footer__network { flex-direction: column; align-items: flex-start; }
}