/* Only the three introduction pages load this stylesheet. TOP remains unchanged. */
.intro-header { background: #f8fafce8; border-bottom: 1px solid #dce4e9; }
.intro-header-inner { max-width: 1040px; margin: auto; padding: 22px 28px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.intro-header .brand { display: flex; align-items: center; gap: 10px; }
.intro-header .portal-logo { width: 34px; height: 42px; }
.intro-header .brand-name>span { font-size: 10px; }
.intro-header .brand-name>strong { font-size: 23px; }
.intro-home { font-size: 12px; min-height: 44px; display: flex; align-items: center; gap: 8px; }
.intro-nav { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; max-width: 760px; margin: auto; padding: 0 28px 18px; }
.intro-nav a { border: 1px solid #bfcdd7; background: #fff; border-radius: 9px; padding: 12px 6px; text-align: center; font-size: 14px; line-height: 1.5; }
.intro-nav a[aria-current=page] { background: #eaf1f6; border-color: #9bb1c1; box-shadow: inset 0 -3px #51778f; font-weight: 700; }
main.intro-main { max-width: 800px; margin: 0 auto; padding: 40px 28px 24px; }
.intro-article { padding: 38px 42px; background: #ffffffed; border: 1px solid #dce4e9; border-radius: 12px; }
.intro-status { font-size: 11px; letter-spacing: .12em; color: #51778f; margin-bottom: 12px; }
.intro-article h1 { font-family: var(--serif); font-size: 29px; font-weight: 600; }
.intro-article .intro-lead { margin: 16px 0 20px; font-size: 18px; font-weight: 600; color: #385a70; }
.intro-article p:not(.intro-status):not(.intro-lead) { font-size: 14px; line-height: 2; }
.intro-article section { margin-top: 32px; scroll-margin-top: 24px; }
.intro-article h2 { font-size: 17px; font-weight: 650; padding-left: 12px; border-left: 3px solid #91afc2; margin-bottom: 12px; }
.intro-related { border-top: 1px solid #dce4e9; margin-top: 36px; padding-top: 20px; display: flex; flex-wrap: wrap; gap: 12px 24px; }
.intro-related a { font-size: 13px; min-height: 44px; display: flex; align-items: center; gap: 16px; color: #385a70; }
.intro-footer { max-width: 800px; margin: auto; padding: 0 28px 32px; color: #5a6c79; font-size: 11px; line-height: 1.9; }
.intro-footer p:first-child { letter-spacing: .1em; margin-bottom: 8px; }
@media(max-width:640px) {
 .intro-header-inner { padding: 16px 20px; }
 .intro-nav { padding: 0 16px 14px; gap: 6px; }
 .intro-nav a { font-size: 12px; padding: 12px 4px; }
 main.intro-main { padding: 24px 16px 20px; }
 .intro-article { padding: 26px 22px; }
 .intro-article h1 { font-size: 25px; }
 .intro-article .intro-lead { font-size: 16px; }
 .intro-article p:not(.intro-status):not(.intro-lead) { font-size: 14px; line-height: 1.95; }
 .intro-article h2 { font-size: 16px; }
 .intro-footer { padding: 0 22px 28px; }
}

/* Static service introduction cards; no interactive or promotional controls. */
.service-preview { display: grid; gap: 20px; margin-top: 24px; }
.service-card { padding: 24px; border: 1px solid #d6e1e9; border-radius: 12px; background: linear-gradient(135deg,#f2f7fa,#fff 70%); }
.service-card-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.service-symbol { display: grid; place-items: center; flex: 0 0 48px; height: 48px; background: #e3edf4; color: #41677e; border-radius: 12px; font-size: 28px; line-height: 1; }
.intro-article .service-category { color: #516e81; font-size: 11px !important; letter-spacing: .08em; margin: 0 0 3px; }
.service-card h3 { color: #29495e; font-size: 20px; line-height: 1.5; margin: 0; }
.service-card dl { margin: 18px 0 0; padding-top: 16px; border-top: 1px solid #dce6ec; }
.service-card dt { margin-top: 12px; color: #41677e; font-size: 12px; font-weight: 700; }
.service-card dt:first-child { margin-top: 0; }
.service-card dd { margin: 5px 0 0; font-size: 13px; line-height: 1.9; color: #415461; }
@media(max-width:640px) {
 .service-card { padding: 20px 18px; }
 .service-card h3 { font-size: 19px; }
}