/* ============================================
   harvard.css — 跃迁培训官网 · Marketing Design System
   风格对齐 marketing/index-campus.html（蓝黄 marketing 主调）
   引用方式：<link rel="stylesheet" href="../shared/styles/harvard.css">
   说明：保留所有 --hv-* 变量名与 class 名，仅替换配色与质感，
         让所有 demo 页面自动继承 marketing 风格，无需改 HTML 结构。
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800&family=Fraunces:ital,opsz,wght@0,9..144,500;0,9..144,600;1,9..144,400;1,9..144,500&family=Noto+Sans+SC:wght@300;400;500;600;700;800&family=Noto+Serif+SC:wght@500;600;700&display=swap');

:root {
  /* ——— Marketing Palette（原 crimson/indigo → blue/ink 映射） ——— */
  --hv-crimson:       #1B4ED8;  /* 原红 → marketing 主蓝 */
  --hv-crimson-dark:  #0A2BA0;  /* 原深红 → 深蓝 */
  --hv-crimson-light: #4A74E4;  /* 原亮红 → 亮蓝 */
  --hv-indigo:        #0B1320;  /* 原深靛 → marketing ink（近黑蓝） */
  --hv-indigo-soft:   #162036;
  --hv-indigo-ink:    #0B1320;

  /* Accent（marketing 点缀色：珊瑚/琥珀/薄荷 + 副蓝） */
  --hv-ivy:         #0FB67C;   /* 原 Harvard ivy → mint 绿 */
  --hv-bluebonnet:  #3A56BA;   /* 保留为副蓝 */
  --hv-saffron:     #FF6547;   /* 原 saffron → coral 橙红 */
  --hv-gold:        #FFB020;   /* 原金 → marketing amber */
  --hv-lemon:       #FFE08A;

  /* Neutrals — marketing cool editorial */
  --hv-text:      #0B1320;     /* 原文本深灰 → ink 深蓝黑 */
  --hv-text-2:    #2C3648;
  --hv-text-3:    #5A6578;
  --hv-ivory:     #FAFBFC;     /* 原 ivory 暖米 → marketing 浅灰蓝 */
  --hv-paper:     #FFFFFF;
  --hv-bone:      #E4E8EE;
  --hv-border:    #E4E8EE;
  --hv-white:     #FFFFFF;

  /* Alpha helpers */
  --hv-crimson-10: rgba(27,78,216,.10);
  --hv-crimson-20: rgba(27,78,216,.20);
  --hv-indigo-06:  rgba(11,19,32,.06);
  --hv-indigo-10:  rgba(11,19,32,.10);
  --hv-ink-white-55: rgba(255,255,255,.55);
  --hv-ink-white-70: rgba(255,255,255,.70);

  /* Space scale (8px) */
  --hv-sp-xs: 4px;  --hv-sp-sm: 8px;  --hv-sp-md: 16px;
  --hv-sp-lg: 24px; --hv-sp-xl: 40px; --hv-sp-2xl: 64px; --hv-sp-3xl: 96px;

  /* Radii — marketing 偏柔和圆润 */
  --hv-r-sm: 8px; --hv-r-md: 12px; --hv-r-lg: 16px; --hv-r-xl: 20px;

  /* Shadows — 柔和更贴近 marketing */
  --hv-shadow-sm: 0 1px 2px rgba(11,19,32,.05), 0 2px 8px rgba(11,19,32,.04);
  --hv-shadow-md: 0 8px 24px -8px rgba(11,19,32,.14);
  --hv-shadow-lg: 0 24px 50px -18px rgba(11,19,32,.18);

  /* Typography — marketing 的 Manrope + Fraunces + Noto SC */
  --hv-serif: 'Fraunces', 'Noto Serif SC', Georgia, 'Songti SC', serif;
  --hv-sans:  'Manrope', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif;

  --hv-nav-h: 68px;
}

/* ——— Reset / base ——— */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--hv-sans);
  background: var(--hv-ivory);
  color: var(--hv-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ——— Nav ——— */
.hv-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--hv-nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--hv-sp-xl);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hv-border);
}
.hv-nav-logo { display: flex; align-items: center; gap: 12px; }
.hv-nav-logo img { height: 40px; width: 40px; object-fit: contain; border-radius: 50%; background: #fff; padding: 2px; border: 1px solid var(--hv-border); }
.hv-nav-logo-text { font-family: var(--hv-serif); font-size: 17px; font-weight: 700; color: var(--hv-ink, var(--hv-text)); line-height: 1.2; letter-spacing: .02em; }
.hv-nav-logo-text em { font-style: italic; font-weight: 500; color: var(--hv-crimson); }
.hv-nav-links { display: flex; gap: 4px; }
.hv-nav-links a {
  color: var(--hv-text-2); font-size: 14.5px; font-weight: 500;
  padding: 9px 14px; border-radius: 8px;
  transition: background .2s, color .2s;
}
.hv-nav-links a:hover { background: var(--hv-crimson-10); color: var(--hv-crimson); }
.hv-cta {
  background: var(--hv-crimson); color: #fff;
  font-size: 14px; font-weight: 600;
  padding: 11px 18px; border-radius: 10px;
  transition: background .25s, transform .25s, box-shadow .25s;
  border: 1.5px solid var(--hv-crimson);
}
.hv-cta:hover { background: var(--hv-crimson-dark); border-color: var(--hv-crimson-dark); box-shadow: 0 8px 24px rgba(27,78,216,.24); }
.hv-cta-ghost {
  background: transparent; color: var(--hv-text);
  border: 1.5px solid var(--hv-border);
  font-size: 14px; font-weight: 600;
  padding: 11px 18px; border-radius: 10px;
  transition: all .25s;
}
.hv-cta-ghost:hover { background: var(--hv-text); color: #fff; border-color: var(--hv-text); }

/* ——— Section ——— */
.hv-section { padding: var(--hv-sp-3xl) var(--hv-sp-xl); }
.hv-section-inner { max-width: 1140px; margin: 0 auto; }
.hv-eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: .14em;
  color: var(--hv-crimson); text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-flex; align-items: center; gap: 10px;
}
.hv-eyebrow::before {
  content: ''; width: 28px; height: 1px; background: var(--hv-crimson);
}
.hv-h1 {
  font-family: var(--hv-serif);
  font-size: clamp(32px, 4.4vw, 56px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--hv-indigo);
}
.hv-h1 em { font-style: italic; font-weight: 400; color: var(--hv-crimson); }
.hv-h2 {
  font-family: var(--hv-serif);
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 500; color: var(--hv-indigo);
  line-height: 1.1;
  letter-spacing: -.015em;
}
.hv-h2 em { font-style: italic; font-weight: 400; color: var(--hv-crimson); }
.hv-lead { font-size: 17px; color: var(--hv-text-3); line-height: 1.75; max-width: 640px; }

/* Dark section invert（深色区块：指向 marketing 的深 ink 背景） */
.hv-dark { background: var(--hv-indigo); color: #fff; }
.hv-dark .hv-h2, .hv-dark .hv-h1 { color: #fff; }
.hv-dark .hv-h2 em, .hv-dark .hv-h1 em { color: var(--hv-gold); }
.hv-dark .hv-eyebrow { color: var(--hv-gold); }
.hv-dark .hv-eyebrow::before { background: var(--hv-gold); }
.hv-dark .hv-lead { color: rgba(255,255,255,.7); }

/* ——— Button ——— */
.hv-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--hv-sans); font-size: 15px; font-weight: 600;
  padding: 12px 22px; border-radius: 10px;
  transition: all .25s;
  border: 1.5px solid transparent;
}
.hv-btn-primary { background: var(--hv-crimson); color: #fff; box-shadow: 0 4px 16px rgba(27,78,216,.22); }
.hv-btn-primary:hover { background: var(--hv-crimson-dark); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(27,78,216,.32); }
.hv-btn-outline {
  background: transparent; color: var(--hv-indigo);
  border-color: var(--hv-border);
}
.hv-btn-outline:hover { background: var(--hv-indigo); color: #fff; border-color: var(--hv-indigo); }
.hv-btn-ghost {
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.92);
  border-color: rgba(255,255,255,.22);
}
.hv-btn-ghost:hover { background: rgba(255,255,255,.16); }

/* ——— Course / Program Card ——— */
.hv-card {
  background: var(--hv-white);
  border: 1px solid var(--hv-border);
  border-radius: var(--hv-r-lg);
  padding: 32px 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s, border-color .3s;
  position: relative; overflow: hidden;
}
.hv-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--hv-crimson); opacity: 0;
  transition: opacity .25s;
}
.hv-card:hover { transform: translateY(-4px); box-shadow: var(--hv-shadow-lg); border-color: transparent; }
.hv-card:hover::before { opacity: 1; }
.hv-card-accent-crimson::before    { background: var(--hv-crimson); }
.hv-card-accent-saffron::before    { background: var(--hv-saffron); }
.hv-card-accent-bluebonnet::before { background: var(--hv-bluebonnet); }
.hv-card-accent-ivy::before        { background: var(--hv-ivy); }

.hv-card-icon {
  width: 64px; height: 64px;
  border-radius: var(--hv-r-md);
  background: var(--hv-crimson-10);
  color: var(--hv-crimson);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  border: 1px solid var(--hv-border);
}
.hv-card-icon img { width: 100%; height: 100%; object-fit: cover; }

.hv-tag {
  display: inline-block;
  font-size: 11.5px; font-weight: 700; letter-spacing: .08em;
  padding: 5px 12px; border-radius: 999px;
  width: fit-content;
  background: var(--hv-crimson-10); color: var(--hv-crimson);
  border: 1px solid var(--hv-crimson-20);
}
.hv-tag-saffron    { background: rgba(255,101,71,.10);  color: var(--hv-saffron);    border-color: rgba(255,101,71,.25); }
.hv-tag-bluebonnet { background: rgba(58,86,186,.10);   color: var(--hv-bluebonnet); border-color: rgba(58,86,186,.25); }
.hv-tag-ivy        { background: rgba(15,182,124,.10);  color: #0A8E5C;              border-color: rgba(15,182,124,.30); }

.hv-card-title {
  font-family: var(--hv-serif);
  font-size: 24px; font-weight: 500; color: var(--hv-indigo);
  letter-spacing: -.01em; line-height: 1.2;
}
.hv-card-desc { font-size: 14.5px; color: var(--hv-text-2); line-height: 1.75; }
.hv-card-points { list-style: none; display: flex; flex-direction: column; gap: 8px; font-size: 14px; color: var(--hv-text-2); margin-top: 4px; }
.hv-card-points li { display: flex; gap: 10px; align-items: flex-start; }
.hv-card-points li::before { content: '✓'; color: var(--hv-ivy); font-weight: 700; font-size: 12px; line-height: 1.6; flex-shrink: 0; }

.hv-enter {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 700; color: var(--hv-crimson);
  margin-top: auto; padding-top: 14px;
  border-top: 1px solid var(--hv-border);
}
.hv-enter .arr { transition: transform .25s; }
.hv-card:hover .hv-enter .arr { transform: translateX(5px); }

/* ——— Footer（保留 marketing 深色底） ——— */
.hv-footer {
  background: var(--hv-indigo);
  padding: 32px var(--hv-sp-xl);
  border-top: 1px solid rgba(255,176,32,.14);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.hv-footer-brand { display: flex; align-items: center; gap: 12px; }
.hv-footer-brand img { height: 36px; width: 36px; border-radius: 50%; object-fit: contain; background: #fff; padding: 2px; }
.hv-footer-brand-name { font-family: var(--hv-serif); font-size: 14px; color: rgba(255,255,255,.75); }
.hv-footer-copy { font-size: 12px; color: rgba(255,255,255,.42); }
.hv-footer-copy a { color: inherit; }
.hv-footer-copy a:hover { color: var(--hv-gold); }

/* ——— Responsive ——— */
@media (max-width: 1024px) {
  .hv-nav-links { display: none; }
  .hv-section { padding: 64px 20px; }
  .hv-nav { padding: 0 20px; }
  .hv-footer { padding: 24px 20px; flex-direction: column; text-align: center; }
}