/* FS IT 手冊 — 门户首页 */

:root {
  --blue: #0078d4;
  --blue-dark: #004578;
  --blue-soft: #eff6fc;
  --blue-active: #cfe8ff;
  --bg: #f3f2f1;
  --surface: #ffffff;
  --surface-soft: #f3f2f1;
  --surface-alt: #faf9f8;
  --line: #e1dfdd;
  --text: #242424;
  --text-muted: #605e5c;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 2px 4px rgba(0,0,0,.04), 0 12px 28px rgba(15,60,120,.08);
  --font: 'Noto Sans SC', 'Segoe UI', system-ui, sans-serif;
  --logo-frame-bg: #ffffff;
  --logo-frame-border: var(--line);
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes soft-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-10px, 12px) scale(1.06); }
}

@keyframes logo-pop {
  0% { transform: scale(.92); }
  60% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(0, 120, 212, 0.22); }
  70% { box-shadow: 0 0 0 10px rgba(0, 120, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 120, 212, 0); }
}

body.portal-body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(0, 120, 212, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(3, 131, 135, 0.07), transparent 22%),
    linear-gradient(180deg, #fbfbfa 0%, var(--bg) 220px, #f7f6f4 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.portal-header {
  position: sticky;
  top: 0;
  z-index: 30;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(225, 223, 221, 0.8);
  animation: fade-in .45s var(--ease-out) both;
}

.portal-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--logo-frame-bg);
  border: 1px solid var(--logo-frame-border);
  display: block;
  transition: transform .25s var(--ease-spring), box-shadow .25s ease;
}

.brand:hover .brand-mark,
.brand--link:hover .brand-mark {
  transform: scale(1.06) rotate(-2deg);
  box-shadow: 0 6px 16px rgba(15, 60, 120, 0.12);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-series {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.brand-doc {
  font-size: 12px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-left: auto;
}

.portal-main {
  flex: 1 0 auto;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 40px;
}

.portal-hero {
  position: relative;
  margin-bottom: 36px;
  padding: 34px 36px;
  border: 1px solid rgba(225, 223, 221, 0.9);
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0%, rgba(0, 120, 212, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.92));
  box-shadow: 0 12px 34px rgba(15, 60, 120, 0.06);
  overflow: hidden;
  animation: fade-up .55s var(--ease-out) both;
}

.portal-hero::after {
  content: '';
  position: absolute;
  right: -36px;
  top: -36px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 120, 212, 0.12), transparent 68%);
  pointer-events: none;
  animation: soft-float 8s ease-in-out infinite;
}

.portal-hero-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
  animation: fade-up .5s var(--ease-out) .05s both;
}

.portal-hero-title {
  font-size: clamp(32px, 5vw, 42px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 12px;
  animation: fade-up .55s var(--ease-out) .1s both;
}

.portal-hero-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 620px;
  line-height: 1.65;
  animation: fade-up .55s var(--ease-out) .16s both;
}

.portal-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.portal-stat {
  min-width: 120px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(225, 223, 221, 0.9);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 22px rgba(15, 60, 120, 0.05);
  opacity: 0;
  animation: fade-up .5s var(--ease-out) both;
  animation-delay: calc(.22s + var(--stat-i, 0) * .07s);
  transition: transform .25s var(--ease-out), box-shadow .25s ease, border-color .25s ease;
}

.portal-stat:hover {
  transform: translateY(-3px);
  border-color: #c7e0f4;
  box-shadow: 0 12px 26px rgba(15, 60, 120, 0.1);
}

.portal-stat-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.portal-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.portal-section {
  margin-bottom: 22px;
  padding: 18px 20px 20px;
  border: 1px solid rgba(225, 223, 221, 0.86);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 28px rgba(15, 60, 120, 0.04);
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity .55s var(--ease-out),
    transform .55s var(--ease-out),
    box-shadow .25s ease,
    border-color .25s ease;
}

.portal-section.is-inview {
  opacity: 1;
  transform: translateY(0);
}

.portal-section:hover {
  border-color: rgba(199, 224, 244, 0.95);
  box-shadow: 0 14px 32px rgba(15, 60, 120, 0.07);
}

.portal-section-head {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(225, 223, 221, 0.9);
}

.portal-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 4px;
  padding: 0;
  border: none;
}

.portal-section-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

.portal-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

.portal-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 249, 248, 0.96));
  border: 1px solid rgba(225, 223, 221, 0.96);
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(15, 60, 120, 0.05);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity .45s var(--ease-out),
    transform .35s var(--ease-out),
    box-shadow .25s ease,
    border-color .25s ease;
  transition-delay: 0s, 0s, 0s, 0s;
}

.portal-section.is-inview .portal-card {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(var(--card-i, 0) * .06s);
}

.portal-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--card-accent, var(--blue));
  transform: scaleY(0);
  transform-origin: center top;
  transition: transform .3s var(--ease-out);
  border-radius: 0 2px 2px 0;
}

.portal-card:hover {
  transform: translateY(-4px);
  border-color: #c7e0f4;
  box-shadow: 0 16px 32px rgba(15, 60, 120, 0.12);
}

.portal-card:hover::before {
  transform: scaleY(1);
}

.portal-card:active {
  transform: translateY(-1px) scale(.995);
}

.portal-card--draft {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 251, 251, 0.96));
}

.portal-card-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: var(--card-accent, var(--blue));
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  display: grid;
  place-items: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3);
  transition: transform .35s var(--ease-spring), box-shadow .25s ease;
}

.portal-card:hover .portal-card-icon {
  transform: scale(1.08) rotate(-3deg);
  animation: pulse-ring .9s ease;
}

.portal-card-icon--img {
  background: var(--logo-frame-bg);
  border: 1px solid var(--logo-frame-border);
  padding: 5px;
  overflow: hidden;
}

.portal-card-icon--img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: transform .35s var(--ease-spring);
}

.portal-card:hover .portal-card-icon--img img {
  transform: scale(1.08);
}

.portal-card-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.portal-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.35;
  transition: color .2s ease;
}

.portal-card:hover .portal-card-title {
  color: var(--blue-dark);
}

.portal-card-version {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-soft);
  transition: background .2s ease, color .2s ease;
}

.portal-card:hover .portal-card-version {
  background: var(--blue-soft);
  color: var(--blue-dark);
}

.portal-card-arrow {
  align-self: center;
  font-size: 18px;
  color: var(--text-muted);
  transition: transform .3s var(--ease-spring), color .2s ease;
}

.portal-card:hover .portal-card-arrow {
  transform: translateX(5px);
  color: var(--blue);
}

.portal-footer {
  flex-shrink: 0;
  margin-top: auto;
  width: 100%;
  text-align: center;
  padding: 20px 24px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--surface);
  border-top: 1px solid var(--line);
  animation: fade-in .6s var(--ease-out) .3s both;
}

@media (max-width: 640px) {
  .portal-main {
    padding: 28px 16px 28px;
  }

  .portal-hero {
    padding: 24px 20px;
    border-radius: 18px;
  }

  .portal-section {
    padding: 16px;
    border-radius: 16px;
  }

  .portal-cards { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition-duration: .01ms !important;
  }

  .portal-section,
  .portal-card {
    opacity: 1 !important;
    transform: none !important;
  }
}