/* 首页门户：沿用官网公共主题，样式限定在首页。 */
.portal-home .portal-hero { padding: 88px 0 0; }
.portal-home .hero-badge { font-size: 16px; letter-spacing: 3px; }
.portal-home .portal-hero h1 { font-size: clamp(38px, 5.1vw, 68px); line-height: 1.22; letter-spacing: 3px; }
.portal-home .hero-sub { font-size: clamp(17px, 2vw, 21px); color: #d7e1fa; margin-top: 24px; }
.portal-home .hero-cta { margin-top: 32px; }
.portal-stats { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin-top: 76px; padding-top: 32px; padding-bottom: 34px; border-top: 1px solid #ffffff30; }
.portal-stat { text-align: center; border-right: 1px solid #ffffff25; }
.portal-stat:last-child { border: 0; }
.portal-stat strong { font-size: clamp(26px, 3vw, 36px); font-variant-numeric: tabular-nums; line-height: 1.3; letter-spacing: -1px; }
.portal-stat span { font-size: 14px; margin-left: 7px; color: #c5d3f5; }
.portal-stat p { color: #c5d3f5; font-size: 14px; margin-top: 8px; }
.portal-home .section-head { margin-bottom: 40px; }
.capability-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.capability-item { padding: 6px 30px; border-left: 1px solid var(--line); }
.capability-item:first-child { border: 0; }
.capability-index { font-size: 14px; color: var(--primary); letter-spacing: 2px; }
.capability-item h3 { margin: 12px 0 8px; font-size: 28px; }
.capability-item p { font-size: 16px; color: var(--muted); }
.portal-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 20px; }
.portal-card { grid-column: span 2; display: flex; flex-direction: column; align-items: flex-start; padding: 30px; min-height: 232px; border: 1px solid var(--line); border-radius: 16px; background: #fff; transition: transform .25s, border-color .25s, box-shadow .25s; }
.portal-card:nth-child(n+4) { grid-column: span 3; }
.portal-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-card); }
.portal-number { font-size: 14px; letter-spacing: 1.4px; color: #63718c; }
.portal-card h3 { font-size: 25px; margin: 16px 0 6px; }
.portal-card p { color: var(--muted); font-size: 16px; }
.portal-link { display: block; margin-top: 25px; color: var(--primary); font-weight: 600; font-size: 16px; }
.learning-feature { display: grid; grid-template-columns: 1fr 1.4fr; overflow: hidden; margin-top: 24px; border: 1px solid #d6def4; border-radius: 22px; background: #f4f7ff; }
.learning-heading { padding: 42px; background: #e9eeff; display: flex; flex-direction: column; align-items: flex-start; }
.learning-label { font-size: 14px; color: #3b38c3; border: 1px solid #bbc4f1; border-radius: 30px; padding: 4px 12px; }
.learning-heading h3 { font-size: clamp(23px, 2.4vw, 30px); line-height: 1.55; margin: 22px 0 28px; }
.learning-heading h3 span { color: #3431b6; }
.learning-heading .btn { margin-top: auto; }
.learning-body { padding: 42px; display: flex; flex-direction: column; justify-content: center; }
.learning-intro { font-size: 18px; line-height: 1.95; }
.learning-highlights { margin-top: 24px; font-size: 16px; line-height: 1.9; color: #3b4770; }
.learning-steps { display: flex; align-items: center; gap: 12px; margin-top: 28px; }
.learning-steps span { padding: 8px 14px; border-radius: 8px; background: #fff; color: #3431b6; font-size: 16px; }
.learning-steps b { color: #7e8aaf; }
.learning-summary { font-size: 14px; color: #586582; margin-top: 16px; }
.learning-coach { background: #f2faf8; border-color: #cce8df; }
.learning-coach .learning-heading { background: #e3f3ec; }
.learning-coach .learning-label { color: #18664d; border-color: #acd6c4; }
.learning-coach .learning-heading h3 span { color: #18664d; }
.learning-coach .btn { background: #18664d; box-shadow: none; }
.portal-partners { text-align: center; background: #f6f7fd; }
.portal-partners h2 { font-size: clamp(28px, 3.5vw, 40px); line-height: 1.55; margin-top: 12px; }
.partner-intro { margin-top: 22px; font-size: 20px; }
.partner-types { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px 28px; margin: 18px 0 30px; color: var(--muted); font-size: 16px; }
.portal-home .portal-closing { padding-bottom: 0; }
.portal-home .portal-closing .hero-cta { margin-top: 26px; }
.portal-manifesto { text-align: center; padding: 54px 0 0; font-size: 17px; line-height: 2; color: #4c5870; }
.portal-manifesto p:first-child { color: #262b50; font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.learning-dialog { margin: auto; padding: 32px; width: min(480px, calc(100% - 32px)); border: 0; border-radius: 20px; box-shadow: var(--shadow-card); }
.learning-dialog::backdrop { background: #0a0d2899; }
.learning-dialog h2 { font-size: 23px; }
.learning-dialog p { margin: 18px 0 24px; color: var(--muted); font-size: 16px; }
.portal-home :is(a, button):focus-visible { outline: 3px solid #1998ff; outline-offset: 5px; }
@media (max-width: 1023px) {
  .capability-item { padding: 6px 18px; }
  .learning-heading, .learning-body { padding: 28px; }
  .learning-steps { gap: 8px; flex-wrap: wrap; }
  .learning-steps span { padding: 6px 10px; }
}
@media (max-width: 768px) {
  .portal-home .portal-hero { padding-top: 56px; }
  .portal-home .hero-badge { font-size: 14px; letter-spacing: 1px; padding: 7px 12px; }
  .portal-home .portal-hero h1 { font-size: clamp(32px, 7vw, 48px); letter-spacing: 1px; }
  .portal-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 44px; gap: 28px 0; }
  .portal-stat:nth-child(even) { border: 0; }
  .portal-stat:last-child { grid-column: 1 / -1; }
  .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 0; }
  .capability-item:nth-child(3) { border: 0; }
  .capability-item h3 { font-size: 24px; }
  .capability-item p { font-size: 15px; }
  .portal-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .portal-card, .portal-card:nth-child(n+4) { grid-column: auto; padding: 22px; }
  .portal-card:last-child { grid-column: 1 / -1; }
  .portal-card h3 { font-size: 22px; }
  .learning-feature { grid-template-columns: 1fr; }
  .learning-heading h3 br { display: none; }
  .learning-heading h3 span { display: block; }
  .portal-manifesto { padding-top: 38px; font-size: 16px; }
  .portal-manifesto p:first-child { font-size: 18px; }
}
@media (max-width: 480px) {
  .portal-home .hero-cta { gap: 12px; }
  .portal-home .hero-cta .btn { width: 100%; max-width: 320px; }
  .portal-grid { grid-template-columns: 1fr; }
  .portal-card { min-height: 200px; }
  .learning-heading, .learning-body { padding: 24px; }
  .capability-item { padding: 4px 12px; }
}
@media (prefers-reduced-motion: reduce) { .portal-card { transition: none; } .portal-card:hover { transform: none; } }