/* IA V2.2 — Student Layout Foundation
   学生端统一页面壳：禁止各页自定 max-width / 左右 margin / 主内容宽度。
*/

:root {
  --student-page-max: 1280px;
  --student-page-pad-y: 24px;
  --student-page-pad-x: 48px;
  --student-card-glass: rgba(255, 255, 255, 0.18);
  --student-card-border: rgba(255, 255, 255, 0.35);
  --student-card-blur: blur(28px) saturate(1.3);
  --student-card-radius: 24px;
  --student-card-shadow:
    0 14px 36px rgba(62, 36, 18, 0.08),
    0 1px 0 rgba(255, 255, 255, 0.5) inset;
  --student-ink: #2a1c12;
  --student-muted: rgba(62, 36, 18, 0.6);
  --student-accent: #f58220;
}

.student-page {
  width: 100%;
  box-sizing: border-box;
  color: var(--student-ink);
}

.student-page-container {
  width: 100%;
  max-width: var(--student-page-max);
  margin-left: auto;
  margin-right: auto;
  padding: var(--student-page-pad-y) var(--student-page-pad-x);
  box-sizing: border-box;
}

.student-page-header {
  margin: 0 0 20px;
}

.student-page-header__eyebrow {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
}

.student-page-header__eyebrow a {
  color: var(--student-muted);
  text-decoration: none;
}

.student-page-header__eyebrow a:hover,
.student-page-header__eyebrow a:focus-visible {
  color: var(--student-accent);
}

.student-page-header__title {
  margin: 0 0 8px;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.student-page-header__lead {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 650;
  color: var(--student-muted);
  line-height: 1.45;
}

.student-page-header__meta {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--student-muted);
}

.student-page-header__meta strong {
  color: var(--student-ink);
  font-weight: 850;
}

.student-card {
  box-sizing: border-box;
  width: 100%;
  padding: 18px 20px;
  border-radius: var(--student-card-radius);
  background: var(--student-card-glass);
  -webkit-backdrop-filter: var(--student-card-blur);
  backdrop-filter: var(--student-card-blur);
  border: 1px solid var(--student-card-border);
  box-shadow: var(--student-card-shadow);
}

.student-page--center .student-page-container {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

@media (max-width: 720px) {
  :root {
    --student-page-pad-y: 16px;
    --student-page-pad-x: 16px;
  }

  .student-page-header__title {
    font-size: 28px;
  }
}