/* ── CSS 변수 ── */
    :root {
      --navy: #1E3A5F; --navy-deep: #152A47;
      --blue: #0070C0; --blue-light: #EBF3FB;
      --orange: #E8520A; --orange-light: #FFF3EE;
      --steel: #4A7FA5; --white: #FFFFFF;
      --gray-50: #F7F9FB; --gray-100: #EEF2F7;
      --gray-300: #C5D2DE; --gray-500: #6B8299;
      --gray-700: #3D556B; --text: #1A2B3C;
      --green: #16A34A; --red: #DC2626; --amber: #D97706;
    }

    /* ── 리셋 & 기본 ── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: 'Noto Sans KR', sans-serif;
      background: var(--gray-50); color: var(--text);
      line-height: 1.7; overflow-x: hidden;
    }

    /* ── 접근성: 포커스 스타일 (WCAG 2.1) ── */
    :focus-visible {
      outline: 3px solid var(--orange);
      outline-offset: 2px;
    }

    /* ── 접근성: 스크린리더 전용 텍스트 ── */
    .sr-only {
      position: absolute; width: 1px; height: 1px;
      padding: 0; margin: -1px; overflow: hidden;
      clip: rect(0,0,0,0); white-space: nowrap; border: 0;
    }

    /* ── Skip Navigation (접근성 WCAG) ── */
    .skip-nav {
      position: absolute; top: -40px; left: 0;
      background: var(--orange); color: white;
      padding: 8px 16px; z-index: 10000;
      font-weight: 700; text-decoration: none;
      border-radius: 0 0 4px 0;
      transition: top 0.2s;
    }
    .skip-nav:focus { top: 0; }

    /* ── Topbar ── */
    .topbar {
      background: var(--navy-deep);
      border-bottom: 1px solid rgba(255,255,255,0.07);
      padding: 12px 40px;
      display: flex; justify-content: space-between; align-items: center;
    }
    .topbar-logo {
      font-family: 'Bebas Neue', sans-serif;
      font-size: 22px; letter-spacing: 0.08em;
      color: white; text-decoration: none;
    }
    .topbar-logo span { color: var(--orange); }
    .topbar-right { font-size: 12px; color: rgba(255,255,255,0.4); }

    /* ── Breadcrumb (SEO + 접근성) ── */
    .breadcrumb-nav {
      background: var(--white);
      border-bottom: 1px solid var(--gray-100);
      padding: 10px 40px;
    }
    .breadcrumb-list {
      list-style: none; display: flex; gap: 0;
      font-size: 12px; color: var(--gray-500);
      flex-wrap: wrap;
    }
    .breadcrumb-list li + li::before {
      content: ' › '; padding: 0 6px;
      color: var(--gray-300);
    }
    .breadcrumb-list a {
      color: var(--blue); text-decoration: none;
    }
    .breadcrumb-list a:hover { text-decoration: underline; }
    .breadcrumb-list [aria-current="page"] { color: var(--gray-700); font-weight: 600; }

    /* ── Hero ── */
    .hero {
      background: var(--navy-deep);
      position: relative; overflow: hidden;
    }
    .hero-grid-bg {
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }
    .hero-gradient {
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse at 70% 50%, rgba(0,112,192,0.25) 0%, transparent 65%),
        radial-gradient(ellipse at 10% 80%, rgba(232,82,10,0.15) 0%, transparent 50%);
      pointer-events: none;
    }
    .hero-inner {
      position: relative; z-index: 2;
      max-width: 1200px; margin: 0 auto;
      padding: 72px 40px 64px;
    }
    .hero-badge {
      display: inline-flex; align-items: center; gap: 8px;
      background: rgba(232,82,10,0.15);
      border: 1px solid rgba(232,82,10,0.4);
      color: #FF8A50; font-size: 11px; font-weight: 700;
      letter-spacing: 0.15em; text-transform: uppercase;
      padding: 6px 14px; border-radius: 2px; margin-bottom: 20px;
    }
    .hero-badge::before {
      content: ''; width: 6px; height: 6px;
      background: #FF8A50; border-radius: 50%;
      animation: pulse 2s ease-in-out infinite;
    }
    @keyframes pulse {
      0%,100%{opacity:1;transform:scale(1)}
      50%{opacity:.4;transform:scale(.8)}
    }

    /* GEO: h1에 주요 키워드를 자연스럽게 포함 */
    .hero-title {
      font-size: clamp(26px, 4vw, 46px);
      font-weight: 900; color: #FFF;
      line-height: 1.25; letter-spacing: -0.02em;
      margin-bottom: 12px;
    }
    .hero-title .accent { color: #FF8A50; }
    .hero-subtitle {
      font-size: 15px; color: rgba(255,255,255,0.55);
      margin-bottom: 32px; max-width: 600px;
    }
    .hero-meta { display: flex; gap: 28px; flex-wrap: wrap; }
    .hero-stat { display: flex; flex-direction: column; }
    .hero-stat-num {
      font-family: 'Bebas Neue', sans-serif;
      font-size: 36px; color: #FFF; line-height: 1; letter-spacing: 0.05em;
    }
    .hero-stat-num span { color: #FF8A50; font-size: 20px; }
    .hero-stat-label { font-size: 11px; color: rgba(255,255,255,0.45); letter-spacing: 0.08em; margin-top: 4px; }
    .hero-divider { width: 1px; background: rgba(255,255,255,0.12); align-self: stretch; margin: 4px 0; }

    /* ── Data Notice (GEO: 신뢰도 명시) ── */
    .data-notice {
      background: #FFFBEB; border: 1px solid rgba(217,119,6,0.3);
      border-radius: 8px; padding: 14px 20px;
      display: flex; gap: 10px; align-items: flex-start;
      max-width: 1200px; margin: 24px auto 0; padding-left: 40px; padding-right: 40px;
    }
    .data-notice-icon { font-size: 16px; flex-shrink: 0; margin-top: 2px; }
    .data-notice p { font-size: 12.5px; color: #92400E; line-height: 1.6; }
    .data-notice strong { font-weight: 700; }

    /* ── 메인 레이아웃 ── */
    .main-layout {
      max-width: 1200px; margin: 0 auto;
      padding: 48px 40px 80px;
      display: grid; grid-template-columns: 260px 1fr;
      gap: 40px; align-items: start;
    }

    /* ── 사이드바 ── */
    .sticky-nav { position: sticky; top: 24px; }
    .nav-label {
      font-size: 10px; font-weight: 700;
      letter-spacing: 0.15em; color: var(--gray-500);
      text-transform: uppercase; padding: 0 12px; margin-bottom: 12px;
    }
    .nav-list {
      list-style: none; background: var(--white);
      border-radius: 10px; border: 1px solid var(--gray-100);
      overflow: hidden; box-shadow: 0 2px 12px rgba(30,58,95,0.06);
    }
    .nav-item a {
      display: flex; align-items: center; gap: 10px;
      padding: 11px 16px; text-decoration: none;
      border-left: 3px solid transparent; transition: all 0.2s;
    }
    .nav-item a:hover { background: var(--gray-50); border-left-color: var(--gray-300); }
    .nav-item.active a { background: var(--blue-light); border-left-color: var(--blue); }
    .nav-city-num {
      font-family: 'Space Mono', monospace; font-size: 10px;
      font-weight: 700; color: var(--orange); width: 20px; flex-shrink: 0;
    }
    .nav-city-icon { font-size: 14px; flex-shrink: 0; }
    .nav-city-text { font-size: 12px; color: var(--gray-700); font-weight: 500; flex: 1; }
    .nav-city-tag {
      font-size: 9px; font-weight: 700; letter-spacing: 0.06em;
      padding: 2px 6px; border-radius: 10px; flex-shrink: 0;
    }
    .tag-red { background: #FEE2E2; color: #DC2626; }
    .tag-amber { background: #FEF3C7; color: #D97706; }
    .tag-blue { background: #DBEAFE; color: #2563EB; }
    .tag-green { background: #DCFCE7; color: #16A34A; }
    .tag-purple { background: #F3E8FF; color: #7C3AED; }
    .nav-separator { height: 1px; background: var(--gray-100); margin: 0 16px; }
    .nav-progress {
      margin-top: 16px; background: var(--white);
      border-radius: 10px; border: 1px solid var(--gray-100);
      padding: 16px; box-shadow: 0 2px 12px rgba(30,58,95,0.06);
    }
    .progress-label {
      display: flex; justify-content: space-between;
      font-size: 11px; color: var(--gray-500); margin-bottom: 10px;
    }
    .progress-bar-bg { height: 6px; background: var(--gray-100); border-radius: 3px; overflow: hidden; }
    .progress-bar-fill {
      height: 100%; background: linear-gradient(90deg, var(--blue), var(--orange));
      border-radius: 3px; transition: width 0.4s ease; width: 0%;
    }

    /* ── 내부 링크 박스 (SEO: 내부 링크 구조 강화) ── */
    .related-links {
      background: var(--white); border-radius: 10px;
      border: 1px solid var(--gray-100); padding: 16px;
      margin-top: 16px; box-shadow: 0 2px 12px rgba(30,58,95,0.06);
    }
    .related-links-title {
      font-size: 10px; font-weight: 700; letter-spacing: 0.12em;
      color: var(--gray-500); text-transform: uppercase; margin-bottom: 10px;
    }
    .related-links ul { list-style: none; display: flex; flex-direction: column; gap: 6px; }
    .related-links a {
      font-size: 12px; color: var(--blue); text-decoration: none;
      display: flex; align-items: center; gap: 6px; line-height: 1.4;
    }
    .related-links a:hover { text-decoration: underline; }
    .related-links a::before { content: '→'; color: var(--orange); font-size: 10px; flex-shrink: 0; }

    /* ── 콘텐츠 영역 ── */
    .content-area { display: flex; flex-direction: column; gap: 32px; }

    /* ── 도시 카드 ── */
    .city-card {
      background: var(--white); border-radius: 12px;
      border: 1px solid var(--gray-100); overflow: hidden;
      box-shadow: 0 2px 16px rgba(30,58,95,0.05); transition: box-shadow 0.3s;
    }
    .city-card:hover { box-shadow: 0 8px 32px rgba(30,58,95,0.1); }
    .city-card-header {
      background: var(--navy); padding: 28px 36px;
      display: flex; align-items: flex-start; gap: 20px;
      position: relative; overflow: hidden;
    }
    .city-card-header::after {
      content: ''; position: absolute; right: -20px; top: -20px;
      width: 120px; height: 120px;
      background: rgba(255,255,255,0.03); border-radius: 50%;
      pointer-events: none;
    }
    .city-num-big {
      font-family: 'Bebas Neue', sans-serif; font-size: 80px;
      line-height: 0.85; color: rgba(255,255,255,0.06);
      position: absolute; right: 28px; bottom: -6px;
      letter-spacing: 0.02em; pointer-events: none;
      /* aria-hidden은 HTML에서 처리 */
    }
    .city-badge {
      font-family: 'Space Mono', monospace; font-size: 11px; font-weight: 700;
      color: var(--orange); background: rgba(232,82,10,0.15);
      border: 1px solid rgba(232,82,10,0.3);
      padding: 4px 10px; border-radius: 2px; flex-shrink: 0;
      margin-top: 4px; letter-spacing: 0.08em;
    }
    .city-icon-big { font-size: 36px; flex-shrink: 0; line-height: 1; }
    .city-keyword {
      font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
      color: rgba(255,255,255,0.4); text-transform: uppercase; margin-bottom: 6px;
    }

    /* SEO/GEO: h2 태그에 도시명 + 핵심 키워드 자연 포함 */
    .city-title {
      font-size: 22px; font-weight: 800; color: #FFF;
      line-height: 1.3; letter-spacing: -0.01em;
    }
    .city-title-sub { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }
    .city-card-body { padding: 32px 36px; }

    /* ── 기후 지표 ── */
    .climate-grid {
      display: grid; grid-template-columns: repeat(4, 1fr);
      gap: 10px; margin-bottom: 20px;
    }
    .climate-card {
      background: var(--navy-deep); border-radius: 8px;
      padding: 14px 12px; text-align: center;
    }
    .climate-val {
      font-family: 'Bebas Neue', sans-serif; font-size: 22px;
      color: #FFF; line-height: 1; letter-spacing: 0.05em; margin-bottom: 4px;
    }
    .climate-val span { color: var(--orange); font-size: 13px; }
    .climate-key { font-size: 10px; color: rgba(255,255,255,0.4); letter-spacing: 0.06em; }

    /* ── 환경 태그 ── */
    .env-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
    .env-tag {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 11px; font-weight: 700; padding: 5px 12px; border-radius: 20px;
    }
    .env-tag-icon { font-size: 13px; }
    .env-salt { background: #FFF3EE; color: #C44208; border: 1px solid rgba(232,82,10,0.2); }
    .env-heat { background: #FEF3C7; color: #B45309; border: 1px solid rgba(217,119,6,0.2); }
    .env-cold { background: #EFF6FF; color: #1D4ED8; border: 1px solid rgba(59,130,246,0.2); }
    .env-rain { background: #F0FDF4; color: #15803D; border: 1px solid rgba(22,163,74,0.2); }
    .env-bump { background: #F3E8FF; color: #7E22CE; border: 1px solid rgba(126,34,206,0.2); }
    .env-chem { background: #F8F8F8; color: #374151; border: 1px solid rgba(55,65,81,0.2); }
    .env-road { background: #F0F9FF; color: #0369A1; border: 1px solid rgba(3,105,161,0.2); }

    /* ── 랭킹 리스트 (GEO: ordered list 시맨틱 강화) ── */
    .rank-section-title {
      display: flex; align-items: center; gap: 10px;
      font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
      color: var(--steel); text-transform: uppercase; margin-bottom: 14px;
    }
    .rank-section-title::before {
      content: ''; display: block; width: 20px; height: 2px;
      background: var(--steel); border-radius: 1px;
    }
    .rank-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
    .rank-item {
      display: flex; gap: 14px; align-items: flex-start;
      padding: 14px 16px; background: var(--gray-50);
      border-radius: 8px; border: 1px solid var(--gray-100);
      transition: border-color 0.2s, background 0.2s;
    }
    .rank-item:hover { border-color: var(--gray-300); background: var(--white); }
    .rank-item.rank-top3 {
      border-left: 3px solid var(--orange);
      background: var(--orange-light); border-color: rgba(232,82,10,0.15);
    }
    .rank-num {
      font-family: 'Bebas Neue', sans-serif; font-size: 26px;
      line-height: 1; color: var(--gray-300);
      width: 28px; flex-shrink: 0; text-align: center; margin-top: 2px;
    }
    .rank-item.rank-top3 .rank-num { color: var(--orange); }
    .rank-content { flex: 1; }
    .rank-symptom { font-size: 14px; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 4px; }
    .rank-arrow { color: var(--gray-500); font-weight: 400; font-size: 13px; }
    .rank-cause { font-size: 12.5px; color: var(--gray-500); line-height: 1.55; }
    .rank-severity { display: flex; flex-direction: column; gap: 4px; align-items: flex-end; flex-shrink: 0; }
    .severity-dot { width: 8px; height: 8px; border-radius: 50%; }
    .sev-high { background: var(--red); }
    .sev-mid  { background: var(--amber); }
    .sev-low  { background: var(--green); }
    .severity-label { font-size: 9px; font-weight: 700; letter-spacing: 0.08em; color: var(--gray-500); }

    /* ── TIP 박스 ── */
    .tip-box {
      background: linear-gradient(135deg, #EBF3FB 0%, #F0F7FF 100%);
      border: 1px solid rgba(0,112,192,0.2); border-radius: 8px;
      padding: 20px 24px; display: flex; gap: 16px; align-items: flex-start;
    }
    .tip-icon {
      width: 36px; height: 36px; background: var(--navy); border-radius: 6px;
      flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 16px;
    }
    .tip-label {
      font-size: 10px; font-weight: 700; letter-spacing: 0.15em;
      color: var(--blue); text-transform: uppercase; margin-bottom: 6px;
    }
    .tip-text { font-size: 13.5px; color: var(--navy); font-weight: 500; line-height: 1.6; }

    /* ── 요약 테이블 ── */
    .summary-card {
      background: var(--white); border-radius: 12px;
      border: 1px solid var(--gray-100); overflow: hidden;
      box-shadow: 0 2px 16px rgba(30,58,95,0.05);
    }
    .summary-header { padding: 28px 36px 0; }
    .summary-eyebrow {
      font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
      color: var(--gray-500); text-transform: uppercase; margin-bottom: 8px;
    }
    /* GEO: h2 섹션 제목에 검색 의도 반영 키워드 포함 */
    .summary-title {
      font-size: 24px; font-weight: 900; color: var(--navy);
      letter-spacing: -0.02em; margin-bottom: 6px;
    }
    .summary-desc { font-size: 13px; color: var(--gray-500); margin-bottom: 24px; }
    .summary-table {
      width: 100%; border-collapse: collapse;
    }
    .summary-table thead tr { background: var(--navy); }
    .summary-table thead th {
      padding: 12px 18px; text-align: left;
      font-size: 11px; font-weight: 700; letter-spacing: 0.1em;
      color: rgba(255,255,255,0.5); text-transform: uppercase;
    }
    .summary-table tbody tr { border-bottom: 1px solid var(--gray-100); transition: background 0.2s; }
    .summary-table tbody tr:last-child { border-bottom: none; }
    .summary-table tbody tr:hover { background: var(--blue-light); }
    .summary-table tbody tr:nth-child(even) { background: var(--gray-50); }
    .summary-table tbody tr:nth-child(even):hover { background: var(--blue-light); }
    .summary-table td { padding: 13px 18px; font-size: 13px; vertical-align: middle; }
    .td-city { font-weight: 700; color: var(--navy); font-size: 14px; }
    .td-city-icon { font-size: 16px; margin-right: 6px; }
    .td-top { font-weight: 600; color: var(--text); }
    .td-env { color: var(--gray-500); font-size: 12px; }
    .td-cta { font-size: 11px; font-weight: 700; color: var(--orange); letter-spacing: 0.06em; }

    /* ── FAQ 섹션 (AEO 핵심) ── */
    .faq-card {
      background: var(--white); border-radius: 12px;
      border: 1px solid var(--gray-100); overflow: hidden;
      box-shadow: 0 2px 16px rgba(30,58,95,0.05);
    }
    .faq-header { background: var(--navy); padding: 28px 36px; }
    .faq-eyebrow {
      font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
      color: rgba(255,255,255,0.4); text-transform: uppercase; margin-bottom: 8px;
    }
    /* AEO: FAQ 헤더 — "자주 묻는 질문" 명시적 레이블 */
    .faq-title { font-size: 22px; font-weight: 800; color: #FFF; }
    .faq-subtitle { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }
    .faq-body { padding: 8px 0; }
    .faq-item { border-bottom: 1px solid var(--gray-100); }
    .faq-item:last-child { border-bottom: none; }
    .faq-question {
      width: 100%; text-align: left; background: none;
      border: none; cursor: pointer; padding: 20px 36px;
      display: flex; align-items: center; gap: 16px;
      transition: background 0.2s;
    }
    .faq-question:hover { background: var(--gray-50); }
    .faq-q-icon {
      width: 28px; height: 28px; background: var(--orange-light);
      border: 1.5px solid rgba(232,82,10,0.3); border-radius: 6px;
      display: flex; align-items: center; justify-content: center;
      font-family: 'Space Mono', monospace; font-size: 12px;
      font-weight: 700; color: var(--orange); flex-shrink: 0;
    }
    .faq-q-text {
      font-size: 14px; font-weight: 700; color: var(--text);
      text-align: left; flex: 1; line-height: 1.45;
    }
    .faq-q-arrow {
      font-size: 16px; color: var(--gray-500);
      transition: transform 0.3s; flex-shrink: 0;
    }
    .faq-item.open .faq-q-arrow { transform: rotate(180deg); }
    .faq-answer {
      display: none; padding: 0 36px 20px 80px;
    }
    .faq-item.open .faq-answer { display: block; }
    /* AEO: 답변 텍스트 — 명확한 단락으로 AI 인용 최적화 */
    .faq-a-text {
      font-size: 14px; color: var(--gray-700); line-height: 1.75;
      border-left: 3px solid var(--blue-light); padding-left: 16px;
    }

    /* ── HowTo 섹션 (AEO) ── */
    .howto-card {
      background: var(--white); border-radius: 12px;
      border: 1px solid var(--gray-100); overflow: hidden;
      box-shadow: 0 2px 16px rgba(30,58,95,0.05);
    }
    .howto-header {
      background: linear-gradient(135deg, var(--navy), var(--steel));
      padding: 28px 36px;
    }
    .howto-eyebrow {
      font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
      color: rgba(255,255,255,0.4); text-transform: uppercase; margin-bottom: 8px;
    }
    .howto-title { font-size: 22px; font-weight: 800; color: #FFF; }
    .howto-subtitle { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }
    .howto-body { padding: 28px 36px; }
    .howto-steps { list-style: none; display: flex; flex-direction: column; gap: 16px; }
    .howto-step {
      display: flex; gap: 20px; align-items: flex-start;
      padding: 18px 20px; border-radius: 8px; background: var(--gray-50);
      border: 1px solid var(--gray-100);
    }
    .step-num {
      width: 36px; height: 36px; background: var(--orange);
      border-radius: 50%; display: flex; align-items: center; justify-content: center;
      font-family: 'Bebas Neue', sans-serif; font-size: 18px; color: white; flex-shrink: 0;
    }
    .step-content {}
    .step-title { font-size: 14px; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
    .step-desc { font-size: 13.5px; color: var(--gray-700); line-height: 1.65; }

    /* ── 포뮬라 섹션 ── */
    .formula-section {
      background: var(--navy-deep); border-radius: 16px;
      padding: 56px 48px; text-align: center; position: relative; overflow: hidden;
    }
    .formula-section::before {
      content: ''; position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
      background-size: 40px 40px; pointer-events: none;
    }
    .formula-section > * { position: relative; z-index: 1; }
    .formula-eyebrow {
      font-size: 11px; font-weight: 700; letter-spacing: 0.2em;
      color: var(--orange); text-transform: uppercase; margin-bottom: 16px;
    }
    .formula-title {
      font-size: clamp(20px, 3vw, 32px); font-weight: 900; color: white;
      margin-bottom: 32px; letter-spacing: -0.02em; line-height: 1.3;
    }
    .formula-eq {
      display: flex; align-items: center; justify-content: center;
      gap: 16px; flex-wrap: wrap; margin-bottom: 36px;
    }
    .formula-item {
      background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
      border-radius: 8px; padding: 20px 24px; text-align: center; min-width: 120px;
    }
    .formula-item-icon { font-size: 28px; margin-bottom: 8px; }
    .formula-item-name { font-size: 13px; font-weight: 700; color: white; margin-bottom: 4px; }
    .formula-item-desc { font-size: 11px; color: rgba(255,255,255,0.4); }
    .formula-op { font-family: 'Bebas Neue', sans-serif; font-size: 48px; color: rgba(255,255,255,0.2); }
    .formula-result {
      background: linear-gradient(135deg, var(--orange), #FF9B50);
      border-radius: 8px; padding: 20px 36px;
    }
    .formula-result-label {
      font-size: 11px; font-weight: 700; letter-spacing: 0.1em;
      color: rgba(255,255,255,0.7); text-transform: uppercase; margin-bottom: 6px;
    }
    .formula-result-value { font-size: 24px; font-weight: 900; color: white; }
    .formula-note { font-size: 14px; color: rgba(255,255,255,0.45); max-width: 480px; margin: 0 auto; line-height: 1.7; }

    /* ── CTA ── */
    .cta-section {
      background: var(--white); border-radius: 16px;
      border: 1px solid var(--gray-100); padding: 48px;
      display: grid; grid-template-columns: 1fr auto;
      gap: 40px; align-items: center;
      box-shadow: 0 2px 16px rgba(30,58,95,0.05);
    }
    .cta-title { font-size: 22px; font-weight: 900; color: var(--navy); margin-bottom: 8px; letter-spacing: -0.02em; }
    .cta-desc { font-size: 14px; color: var(--gray-500); line-height: 1.7; max-width: 480px; }
    .cta-actions { display: flex; flex-direction: column; gap: 12px; align-items: flex-end; }
    .btn-primary {
      display: inline-flex; align-items: center; gap: 8px;
      background: var(--orange); color: white;
      font-size: 14px; font-weight: 700; padding: 14px 28px;
      border-radius: 6px; text-decoration: none; transition: all 0.2s;
      white-space: nowrap; border: none; cursor: pointer;
    }
    .btn-primary:hover { background: #C44208; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232,82,10,0.3); }
    .btn-secondary {
      display: inline-flex; align-items: center; gap: 8px;
      background: transparent; color: var(--navy);
      font-size: 13px; font-weight: 600; padding: 10px 20px;
      border-radius: 6px; border: 1.5px solid var(--gray-300);
      text-decoration: none; transition: all 0.2s; white-space: nowrap; cursor: pointer;
    }
    .btn-secondary:hover { border-color: var(--navy); background: var(--gray-50); }

    /* ── 모바일 네비 ── */
    .mobile-nav {
      display: none; overflow-x: auto;
      background: var(--white); border-bottom: 1px solid var(--gray-100);
      padding: 12px 20px; gap: 8px;
      -webkit-overflow-scrolling: touch; scrollbar-width: none;
      position: sticky; top: 0; z-index: 100;
      box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    }
    .mobile-nav::-webkit-scrollbar { display: none; }
    .mobile-nav-item {
      flex-shrink: 0; font-size: 11px; font-weight: 700;
      padding: 6px 14px; border-radius: 20px;
      border: 1.5px solid var(--gray-300); color: var(--gray-500);
      text-decoration: none; white-space: nowrap; transition: all 0.2s;
    }
    .mobile-nav-item.active { background: var(--navy); border-color: var(--navy); color: white; }

    /* ── 푸터 ── */
    .site-footer {
      background: var(--navy-deep); padding: 40px;
      text-align: center;
    }
    .footer-logo {
      font-family: 'Bebas Neue', sans-serif; font-size: 20px;
      color: white; letter-spacing: 0.08em; text-decoration: none;
      display: inline-block; margin-bottom: 12px;
    }
    .footer-logo span { color: var(--orange); }
    .footer-links { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
    .footer-links a { font-size: 12px; color: rgba(255,255,255,0.4); text-decoration: none; }
    .footer-links a:hover { color: rgba(255,255,255,0.7); text-decoration: underline; }
    .footer-copy { font-size: 11px; color: rgba(255,255,255,0.25); line-height: 1.7; }

    /* ── Scroll reveal ── */
    .reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* ── 반응형 (모바일 우선) ── */
    @media (max-width: 900px) {
      .topbar, .breadcrumb-nav { padding-left: 20px; padding-right: 20px; }
      .hero-inner { padding: 48px 20px 40px; }
      .data-notice { padding: 14px 20px; margin: 20px; }
      .mobile-nav { display: flex; }
      .main-layout { grid-template-columns: 1fr; padding: 24px 20px 60px; }
      .sticky-nav { display: none; }
      .city-card-header, .faq-header, .howto-header { padding: 22px 22px; }
      .city-card-body, .howto-body { padding: 22px; }
      .climate-grid { grid-template-columns: repeat(2, 1fr); }
      .cta-section { grid-template-columns: 1fr; padding: 28px 22px; text-align: center; }
      .cta-actions { align-items: center; }
      .formula-section { padding: 36px 22px; }
      .summary-header { padding: 22px 22px 0; }
      .summary-table { font-size: 11px; }
      .summary-table td, .summary-table th { padding: 10px 12px; }
      /* 모바일에서 4번째 열 숨김 */
      .summary-table td:last-child,
      .summary-table th:last-child { display: none; }
      .faq-question { padding: 16px 22px; }
      .faq-answer { padding: 0 22px 16px 22px; }
      .site-footer { padding: 28px 20px; }
    }

    /* ── 고대비 모드 지원 (접근성) ── */
    @media (prefers-contrast: high) {
      .rank-item { border-color: var(--gray-700); }
      .env-tag { border-width: 2px; }
    }

    /* ── 애니메이션 축소 모드 지원 (접근성) ── */
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
  
body{font-family:'Noto Sans KR','Malgun Gothic',Arial,sans-serif}.reveal{opacity:1;transform:none}.city-card-body p{font-size:16px;line-height:1.95;margin-bottom:16px}.city-card-body p:last-child{margin-bottom:0}.hero-subtitle,.hero-stat-label,.city-keyword,.city-title-sub,.footer-copy,.topbar-right,.footer-links a{color:rgba(255,255,255,.76)}.nav-label{font-size:12px}.nav-city-text{font-size:14px}.nav-city-tag{font-size:12px}.city-card-body h3{font-size:18px;color:var(--navy);margin:24px 0 12px}.city-card-body h3:first-child{margin-top:0}.city-title{font-size:23px}.summary-table{font-size:14px}.summary-table th{font-size:14px}.summary-table td:last-child,.summary-table th:last-child{display:table-cell}.table-scroll{overflow-x:auto}.summary-table{min-width:500px}.card-link{color:var(--navy);text-decoration:none;font-weight:700;font-size:17px;line-height:1.6}.card-link:hover{text-decoration:underline;color:var(--blue)}.article-list{list-style:none;display:grid;gap:16px}.article-list li{border:1px solid var(--gray-100);background:var(--gray-50);border-radius:8px;padding:20px}.article-list .excerpt{color:var(--gray-700);font-size:14px;margin:8px 0 12px}.article-list .read-more{color:var(--blue);font-size:14px;font-weight:700}.article-tag{display:inline-block;font-size:12px;color:var(--steel);margin-bottom:6px}.readtime{font-size:13px;color:var(--gray-500)}.faq-item summary{cursor:pointer;list-style:none;padding:20px 28px;font-size:16px;font-weight:700;color:var(--navy)}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:'＋';float:right;color:var(--orange)}.faq-item[open] summary::after{content:'−'}.faq-item .answer{padding:0 28px 24px;font-size:16px;color:var(--gray-700);line-height:1.9}.source-links{list-style:none}.source-links li{margin:8px 0}.source-links a{font-size:14px;color:var(--blue);overflow-wrap:anywhere}.tip-box p{font-size:14px}.notice-plain{font-size:14px;color:var(--gray-700);margin:0}.subtitle-small{font-size:14px;color:var(--gray-500)}.filter-input{width:100%;padding:13px 15px;border:1px solid var(--gray-300);border-radius:6px;font:inherit}.search-status{font-size:14px;color:var(--gray-500);margin-top:10px}.brand-links{display:flex;flex-wrap:wrap;gap:8px}.brand-links a{padding:8px 12px;background:var(--blue-light);border-radius:6px;color:var(--navy);font-size:14px;text-decoration:none}.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:rgba(255,255,255,.75);font-size:14px;margin-top:20px}.footer-logo{font-family:Arial,sans-serif;font-weight:900}.topbar-logo{font-family:Arial,sans-serif;font-weight:900}.hero-stat-num{font-family:Arial,sans-serif;font-weight:800}.hero-title{overflow-wrap:anywhere}.cta-desc{font-size:16px}.faq-subtitle,.howto-subtitle{color:rgba(255,255,255,.76)}.content-area{min-width:0}section[id]{scroll-margin-top:90px}[hidden]{display:none!important}.read-more{text-decoration:none}.key-answer{font-size:18px!important;color:var(--navy);font-weight:600}.related-list{list-style:none;display:grid;gap:12px}.related-list a{font-size:16px;color:var(--blue)}.mobile-nav-item{font-size:13px}.nav-item a{padding:10px 14px}.nav-item a.active{background:var(--blue-light);border-left-color:var(--blue)}.related-links-title,.progress-label{font-size:13px}.related-links a{font-size:14px}.hero-badge{font-size:12px}.data-notice p{font-size:14px}.tip-label{font-size:12px}.city-badge{font-size:12px}.brand-number{font-size:13px;color:var(--gray-500)}@media(max-width:900px){.summary-table{font-size:13px}.hero-title{font-size:29px}.hero-inner{padding-top:42px}.city-card-body{padding:22px}.article-list li{padding:16px}.topbar-right{max-width:180px;text-align:right}.city-num-big{display:none}.faq-item summary{padding:18px 22px}.faq-item .answer{padding:0 22px 20px}.hero-subtitle{font-size:15px}.main-layout{gap:24px}.hero-meta{gap:20px}}@media print{.sticky-nav,.mobile-nav,.cta-section{display:none}.main-layout{display:block}.hero{background:white}.hero-title{color:var(--navy)}.city-card{break-inside:avoid}}