/* ===== AI 리터러시 랜딩 페이지 (스코프: #landing) ===== */
#landing {
	--al-navy: #002D5A;
	--al-blue: #1264B8;
	--al-blue-mid: #2979D4;
	--al-blue-light: #EBF3FC;
	--al-bg: #F4F7FB;
	--al-surface: #FFFFFF;
	--al-text: #1A2333;
	--al-muted: #5B6B80;
	--al-border: #D8E4F0;
	background: var(--al-bg);
}
#landing .al-wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* HERO */
#landing .al-hero {
	background: var(--al-navy);
	background-image: linear-gradient(120deg, #002D5A 0%, #003D78 100%);
	padding: 72px 0 0;
	overflow: hidden;
}
#landing .al-hero-inner {
	max-width: 1120px; margin: 0 auto; padding: 0 24px;
	display: grid; grid-template-columns: 1fr 360px; gap: 48px; align-items: end;
}
#landing .al-eyebrow {
	font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
	color: #7BB8F0; margin-bottom: 18px;
}
#landing .al-hero h1 {
	font-size: 40px; font-weight: 800; color: #fff; line-height: 1.32;
	word-break: keep-all; letter-spacing: -.01em;
}
#landing .al-hero h1 em { color: #5DB8FF; font-style: normal; }
#landing .al-hero-desc {
	margin-top: 18px; font-size: 16px; color: #A8C8E8; line-height: 1.7; word-break: keep-all;
}
#landing .al-hero-actions {
	margin-top: 34px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
#landing .al-btn-primary {
	background: #fff; color: var(--al-navy); border: none; border-radius: 8px;
	padding: 0 30px; height: 52px; font-size: 16px; font-weight: 700; cursor: pointer;
	white-space: nowrap; transition: transform .15s, box-shadow .15s;
}
#landing .al-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,.2); }
#landing .al-btn-primary:disabled { background: rgba(255,255,255,.3); color: rgba(255,255,255,.6); cursor: default; transform: none; box-shadow: none; }
#landing .al-practice-link {
	font-size: 14px; color: #A8C8E8; cursor: pointer; white-space: nowrap;
}
#landing .al-practice-link u { color: #fff; font-weight: 600; }
#landing .al-practice-link:hover u { color: #5DB8FF; }
#landing .al-hero-meta {
	margin-top: 44px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.12);
	display: flex; gap: 40px; flex-wrap: wrap;
}
#landing .al-hero-meta label {
	display: block; font-size: 16px; color: #7BB8F0; font-weight: 600;
	letter-spacing: .04em; margin-bottom: 5px;
}
#landing .al-hero-meta span { font-size: 18px; color: #D0E8FF; font-weight: 600; }

/* HERO 개념도 (실제 에셋 + 궤도 노드) */
#landing .al-hero-visual { display: flex; justify-content: center; align-items: center; padding-bottom: 24px; }
#landing .al-orbit { position: relative; width: 360px; height: 360px; }
#landing .al-orbit-ring {
	position: absolute; inset: 26px; border-radius: 50%;
	border: 1.5px dashed rgba(255,255,255,.28);
}
#landing .al-core-img {
	position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
	width: 208px; height: 208px; display: block; z-index: 2;
	filter: drop-shadow(0 18px 40px rgba(45,90,220,.45));
	animation: al-float 5s ease-in-out infinite;
}
@keyframes al-float {
	0%, 100% { transform: translate(-50%, -50%); }
	50% { transform: translate(-50%, calc(-50% - 9px)); }
}
@media (prefers-reduced-motion: reduce) {
	#landing .al-core-img { animation: none; }
}
#landing .al-orbit-node {
	position: absolute; z-index: 3;
	background: rgba(255,255,255,.1); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
	border: 1px solid rgba(255,255,255,.28); border-radius: 999px;
	padding: 10px 18px; display: flex; align-items: center; gap: 8px;
	box-shadow: 0 8px 22px rgba(0,10,30,.25);
}
#landing .al-orbit-node i {
	width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0;
}
#landing .al-orbit-node span {
	font-size: 13.5px; font-weight: 600; color: #EAF4FF; white-space: nowrap; letter-spacing: -.01em;
}
#landing .al-orbit-node { width: max-content; margin: 0; }
#landing .al-orbit-node.al-pos-top { top: 2px; left: 50%; transform: translateX(-50%); }
#landing .al-orbit-node.al-pos-left { bottom: 44px; left: -26px; }
#landing .al-orbit-node.al-pos-right { bottom: 44px; right: -26px; }

/* SECTION 공통 */
#landing .al-sec { padding: 68px 0; }
#landing .al-sec + .al-sec { border-top: 1px solid var(--al-border); }
#landing .al-sec-label {
	font-size: 16px; font-weight: 700; letter-spacing: .1em; color: var(--al-blue);
	margin-bottom: 10px; text-transform: uppercase;
}
#landing .al-sec-title {
	font-size: 26px; font-weight: 800; color: var(--al-text); line-height: 1.4; word-break: keep-all;
}
#landing .al-sec-desc {
	margin-top: 12px; font-size: 15px; color: var(--al-muted); line-height: 1.75;
	word-break: keep-all; max-width: 680px;
}

/* 검사 영역 카드 */
#landing .al-domain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 36px; }
#landing .al-domain-card {
	background: var(--al-surface); border: 1px solid var(--al-border); border-radius: 10px; padding: 24px 20px;
	transition: transform .15s, box-shadow .15s;
}
#landing .al-domain-card:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(0,45,90,.08); }
#landing .al-domain-card h6 {
	font-size: 15px; font-weight: 700; color: var(--al-blue); margin-bottom: 14px;
	padding-bottom: 12px; border-bottom: 1px solid var(--al-border);
}
#landing .al-domain-card ul { list-style: none; padding: 0; margin: 0; }
#landing .al-domain-card li {
	font-size: 13.5px; color: var(--al-muted); padding: 5px 0;
	display: flex; align-items: flex-start; gap: 8px; line-height: 1.5;
}
#landing .al-domain-card li::before {
	content: ''; width: 5px; height: 5px; border-radius: 50%;
	background: var(--al-blue-mid); flex-shrink: 0; margin-top: 7px;
}

/* 활용 대상 카드 */
#landing .al-user-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
#landing .al-user-card { background: var(--al-surface); border: 1px solid var(--al-border); border-radius: 10px; overflow: hidden; }
#landing .al-user-head { background: var(--al-blue-light); padding: 20px 22px; display: flex; align-items: center; gap: 12px; }
#landing .al-user-icon {
	width: 40px; height: 40px; border-radius: 9px; background: var(--al-blue);
	display: flex; align-items: center; justify-content: center; font-size: 18px;
}
#landing .al-user-icon-img {
	width: 52px; height: 52px; object-fit: contain; flex-shrink: 0;
}
#landing .al-user-head strong { font-size: 16px; font-weight: 700; color: var(--al-navy); }
#landing .al-user-body { padding: 18px 22px; }
#landing .al-user-body ul { list-style: none; padding: 0; margin: 0; }
#landing .al-user-body li {
	font-size: 13.5px; color: var(--al-muted); line-height: 1.6; padding: 6px 0; display: flex; gap: 8px;
}
#landing .al-user-body li::before { content: '·'; color: var(--al-blue); font-weight: 700; flex-shrink: 0; }

/* 검사 안내 */
#landing .al-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 36px; }
#landing .al-info-block { background: var(--al-surface); border: 1px solid var(--al-border); border-radius: 10px; padding: 24px 26px; }
#landing .al-info-label { font-size: 16px; font-weight: 700; letter-spacing: .06em; color: var(--al-blue); margin-bottom: 12px; }
#landing .al-info-value { font-size: 16px; font-weight: 700; color: var(--al-text); line-height: 1.5; }
#landing .al-info-sub { font-size: 13px; color: var(--al-muted); margin-top: 7px; line-height: 1.6; }
#landing .al-table-wrap { margin-top: 18px; overflow-x: auto; }
#landing .al-table { width: 100%; border-collapse: collapse; font-size: 14px; }
#landing .al-table th, #landing .al-table td {
	padding: 13px 16px; border: 1px solid var(--al-border); text-align: center; font-variant-numeric: tabular-nums;
}
#landing .al-table thead th { background: var(--al-blue-light); font-weight: 700; color: var(--al-navy); font-size: 13px; }
#landing .al-table tbody th { background: var(--al-bg); font-weight: 600; color: var(--al-muted); font-size: 13px; text-align: left; }
#landing .al-table td { color: var(--al-text); font-weight: 500; }
#landing .al-table-note { font-size: 12.5px; color: var(--al-muted); margin-top: 10px; }

/* 응시 방법 스텝 (3단계) */
#landing .al-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 36px; position: relative; max-width: 880px; margin-left: auto; margin-right: auto; }
#landing .al-steps::before {
	content: ''; position: absolute; top: 26px; left: 16.666%; right: 16.666%;
	height: 2px; background: var(--al-border); z-index: 0;
}
#landing .al-step { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 0 10px; position: relative; z-index: 1; }
#landing .al-step-num {
	width: 52px; height: 52px; border-radius: 50%; background: var(--al-navy); color: #fff;
	font-size: 17px; font-weight: 800; display: flex; align-items: center; justify-content: center;
	border: 4px solid var(--al-bg); flex-shrink: 0;
}
#landing .al-step-title { margin-top: 14px; font-size: 15px; font-weight: 700; color: var(--al-text); line-height: 1.4; }
#landing .al-step-desc { margin-top: 7px; font-size: 13px; color: var(--al-muted); line-height: 1.55; }

/* 연습하기 CTA */
#landing .al-cta {
	background: var(--al-navy); background-image: linear-gradient(120deg, #002D5A 0%, #003D78 100%);
	border-radius: 12px; padding: 36px 44px; display: flex; align-items: center;
	justify-content: space-between; gap: 28px; margin-top: 52px; flex-wrap: wrap;
}
#landing .al-cta h4 { font-size: 20px; font-weight: 800; color: #fff; line-height: 1.4; word-break: keep-all; }
#landing .al-cta p { font-size: 14px; color: #A8C8E8; margin-top: 8px; line-height: 1.5; word-break: keep-all; }
#landing .al-cta-btn {
	background: #fff; color: var(--al-navy); border: none; border-radius: 8px;
	padding: 0 32px; height: 52px; font-size: 16px; font-weight: 700; cursor: pointer;
	white-space: nowrap; flex-shrink: 0; transition: transform .15s;
}
#landing .al-cta-btn:hover { transform: translateY(-2px); }
#landing .al-note { font-size: 13px; color: var(--al-muted); margin-top: 18px; line-height: 1.6; }
#landing .al-note a { color: var(--al-blue); text-decoration: underline; font-weight: 600; }

/* 반응형 */
@media (max-width: 900px) {
	#landing .al-hero-inner { grid-template-columns: 1fr; }
	#landing .al-hero-visual { display: none; }
	#landing .al-hero h1 { font-size: 32px; }
	#landing .al-domain-grid { grid-template-columns: repeat(2, 1fr); }
	#landing .al-user-grid { grid-template-columns: 1fr; }
	#landing .al-info-grid { grid-template-columns: 1fr; }
	#landing .al-steps { grid-template-columns: 1fr; gap: 32px 0; }
	#landing .al-steps::before { display: none; }
}