/* ============================================================
   総合教育あいおい塾 — Main Stylesheet
   Version: 1.0.0
   Structure:
     01. Custom Properties
     02. Reset & Base
     03. Typography
     04. Layout Utilities
     05. Components (Buttons, Badges, Tags)
     06. Card Components
     07. Header & Navigation
     08. Hero Section
     09. Section Regions
     10. Top Page Sections
     11. Footer
     12. Page: Category
     13. Page: Article
     14. Animations
     15. Responsive
   ============================================================ */

/* ============================================================
   01. Custom Properties
   ============================================================ */
:root {
  /* Brand Colors */
  --c-forest:       #1e3d2f;
  --c-forest-deep:  #122518;
  --c-forest-mid:   #183224;
  --c-forest-light: #2a5242;
  --c-sage:         #4d6e5a;
  --c-sage-light:   #6a8f78;
  --c-gold:         #8c7355;
  --c-gold-light:   #b8966e;
  --c-gold-pale:    #e8d8bb;

  /* Neutral Colors */
  --c-ink:          #1c1c18;
  --c-charcoal:     #3a3a34;
  --c-stone:        #6a6a62;
  --c-sand:         #9a9890;
  --c-pebble:       #c8c4ba;
  --c-cream:        #f7f5f0;
  --c-paper:        #f2ede4;
  --c-linen:        #ebe6da;
  --c-warm-white:   #faf9f6;
  --c-white:        #ffffff;

  /* Semantic */
  --c-border:       #dcd8ce;
  --c-border-light: #ede9e0;
  --c-text:         #1c1c18;
  --c-text-sub:     #4a4a44;
  --c-text-muted:   #6a6a62;
  --c-text-light:   #9a9890;
  --c-bg:           #f7f5f0;
  --c-surface:      #ffffff;

  /* Category Accent Colors */
  --c-kyoto:     #7a2e2e;
  --c-exam:      #2e3a7a;
  --c-study:     #1e5a3a;
  --c-parent:    #3a5a1e;
  --c-ai:        #4a2e7a;
  --c-research:  #3a3040;
  --c-school:    #7a5520;
  --c-exp:       #1e5a55;

  /* Typography */
  --f-serif: 'Noto Serif JP', 'YuMincho', 'Yu Mincho', '游明朝', Georgia, serif;
  --f-sans:  'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', sans-serif;

  /* Font Sizes */
  --fs-xxs:  0.6875rem;
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.25rem;
  --fs-2xl:  1.5rem;
  --fs-3xl:  1.875rem;
  --fs-4xl:  2.25rem;
  --fs-5xl:  3rem;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Layout */
  --max-w:        1200px;
  --max-w-narrow: 860px;
  --gutter:       clamp(1.25rem, 5vw, 3rem);
  --section-py:   clamp(4rem, 8vw, 7rem);

  /* Effects */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.09);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.11);
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Z-index */
  --z-header:  100;
  --z-overlay: 200;
  --z-modal:   300;
}

/* ============================================================
   02. Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-serif);
  line-height: 1.4;
  font-weight: 600;
}

p {
  margin-bottom: 0;
}

/* ============================================================
   03. Typography
   ============================================================ */
.text-serif { font-family: var(--f-serif); }
.text-sans  { font-family: var(--f-sans); }

.text-xxs  { font-size: var(--fs-xxs); }
.text-xs   { font-size: var(--fs-xs); }
.text-sm   { font-size: var(--fs-sm); }
.text-lg   { font-size: var(--fs-lg); }
.text-xl   { font-size: var(--fs-xl); }
.text-2xl  { font-size: var(--fs-2xl); }
.text-muted { color: var(--c-text-muted); }

.section-eyebrow {
  display: block;
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-sage);
  margin-bottom: var(--sp-3);
}

.section-title {
  font-family: var(--f-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.35;
  letter-spacing: 0.03em;
}

.section-title--lg {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
}

.section-lead {
  margin-top: var(--sp-4);
  font-size: var(--fs-base);
  color: var(--c-text-sub);
  line-height: 1.9;
  max-width: 38em;
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-header--flex {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-6);
}

.section-header__text { flex: 1; }

/* ============================================================
   04. Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container--narrow {
  max-width: var(--max-w-narrow);
}

.section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

.section--sm {
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section--dark {
  background-color: var(--c-forest-deep);
  color: var(--c-cream);
}

.section--dark .section-eyebrow { color: var(--c-sage-light); }
.section--dark .section-title   { color: var(--c-cream); }
.section--dark .section-lead    { color: rgba(247,245,240,0.72); }

.section--alt {
  background-color: var(--c-paper);
}

.divider {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 0;
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }

/* ============================================================
   05. Components
   ============================================================ */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.65em 1.6em;
  font-family: var(--f-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--c-forest);
  color: var(--c-white);
  border-color: var(--c-forest);
}
.btn--primary:hover {
  background: var(--c-forest-light);
  border-color: var(--c-forest-light);
}

.btn--outline {
  background: transparent;
  color: var(--c-forest);
  border-color: var(--c-forest);
}
.btn--outline:hover {
  background: var(--c-forest);
  color: var(--c-white);
}

.btn--ghost {
  background: transparent;
  color: var(--c-text-sub);
  border-color: var(--c-border);
}
.btn--ghost:hover {
  border-color: var(--c-stone);
  color: var(--c-ink);
}

.btn--ghost-light {
  background: transparent;
  color: rgba(247,245,240,0.7);
  border-color: rgba(247,245,240,0.3);
}
.btn--ghost-light:hover {
  color: var(--c-cream);
  border-color: rgba(247,245,240,0.6);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-forest);
  letter-spacing: 0.05em;
  transition: var(--transition);
}
.link-more::after {
  content: '→';
  transition: transform var(--transition);
}
.link-more:hover { color: var(--c-forest-light); }
.link-more:hover::after { transform: translateX(3px); }

.link-more--light {
  color: var(--c-gold-light);
}
.link-more--light:hover { color: var(--c-gold-pale); }

/* --- Badges & Tags --- */
.badge {
  display: inline-block;
  padding: 0.2em 0.7em;
  font-family: var(--f-sans);
  font-size: var(--fs-xxs);
  font-weight: 500;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.badge--category {
  background: rgba(30,61,47,0.09);
  color: var(--c-forest);
}
.badge--research {
  background: rgba(58,48,64,0.1);
  color: var(--c-research);
}
.badge--event {
  background: rgba(122,85,32,0.1);
  color: var(--c-school);
}
.badge--type {
  background: var(--c-linen);
  color: var(--c-charcoal);
}

/* on dark backgrounds */
.badge--outline-light {
  background: transparent;
  border: 1px solid rgba(247,245,240,0.3);
  color: rgba(247,245,240,0.8);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

/* ============================================================
   06. Card Components
   ============================================================ */

/* --- Article Card (vertical) --- */
.article-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  flex-shrink: 0;
  line-height: 0;
  background: var(--c-ink);
}
.article-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}
.article-card:hover .article-card__image img {
  transform: scale(1.04);
}

/* Placeholder image styles by category */
.img-ph { width: 100%; height: 100%; min-height: 100%; }
.img-ph--kyoto   { background: linear-gradient(135deg, #2a1515 0%, #4a2020 100%); }
.img-ph--exam    { background: linear-gradient(135deg, #141428 0%, #1e2040 100%); }
.img-ph--study   { background: linear-gradient(135deg, #0d2020 0%, #1a3530 100%); }
.img-ph--parent  { background: linear-gradient(135deg, #142010 0%, #1e3518 100%); }
.img-ph--ai      { background: linear-gradient(135deg, #1a1028 0%, #2a2042 100%); }
.img-ph--research{ background: linear-gradient(135deg, #18141c 0%, #28202e 100%); }
.img-ph--school  { background: linear-gradient(135deg, #1e1608 0%, #302412 100%); }
.img-ph--exp     { background: linear-gradient(135deg, #0e2020 0%, #183030 100%); }
.img-ph--hero    { background: linear-gradient(160deg, #0c1a12 0%, #182d20 35%, #1e3d2f 65%, #111e16 100%); }

.article-card__body {
  padding: var(--sp-3) var(--sp-5) var(--sp-5);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--sp-2);
}

.article-card__category {
  font-family: var(--f-sans);
  font-size: var(--fs-xxs);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--c-forest);
}

.article-card__title {
  font-family: var(--f-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-ink);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}
.article-card:hover .article-card__title { color: var(--c-forest); }

.article-card__excerpt {
  font-size: var(--fs-sm);
  color: var(--c-text-sub);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card__footer {
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.article-card__meta {
  font-size: var(--fs-xs);
  color: var(--c-text-light);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.article-card__meta-sep { color: var(--c-pebble); }

/* --- Article Card (horizontal) --- */
.article-card--h {
  flex-direction: row;
  border-radius: var(--radius-md);
}
.article-card--h .article-card__image {
  width: 180px;
  flex-shrink: 0;
  aspect-ratio: unset;
  height: auto;
  min-height: 140px;
}
.article-card--h .article-card__body {
  padding: var(--sp-5);
}

/* --- Featured Card --- */
.article-card--featured {
  border: none;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: var(--c-ink);
}
.article-card--featured .article-card__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  aspect-ratio: unset;
}
.article-card--featured .article-card__image img {
  height: 100%;
  transition: transform 0.6s ease;
}
.article-card--featured:hover .article-card__image img {
  transform: scale(1.06);
}
.article-card--featured::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12,26,18,0.92) 0%, rgba(12,26,18,0.4) 60%, transparent 100%);
}
.article-card--featured .article-card__body {
  position: relative;
  z-index: 1;
  padding: var(--sp-8);
  background: none;
  justify-content: flex-end;
}
.article-card--featured .article-card__category { color: var(--c-gold-light); }
.article-card--featured .article-card__title    { color: var(--c-cream); font-size: var(--fs-2xl); }
.article-card--featured .article-card__excerpt  { color: rgba(247,245,240,0.72); }
.article-card--featured .article-card__footer   { border-color: rgba(255,255,255,0.15); }
.article-card--featured .article-card__meta     { color: rgba(247,245,240,0.5); }
.article-card--featured .article-card__meta-sep { color: rgba(255,255,255,0.2); }

/* --- Research Card --- */
.research-card {
  padding: var(--sp-8);
  border: 1px solid rgba(247,245,240,0.1);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.04);
  transition: background var(--transition), border-color var(--transition);
}
.research-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(247,245,240,0.18);
}

.research-card__label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.research-card__title {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-cream);
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin-bottom: var(--sp-3);
  transition: color var(--transition);
}
.research-card:hover .research-card__title { color: var(--c-gold-pale); }

.research-card__excerpt {
  font-size: var(--fs-sm);
  color: rgba(247,245,240,0.65);
  line-height: 1.8;
  margin-bottom: var(--sp-5);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.research-card__footer {
  padding-top: var(--sp-4);
  border-top: 1px solid rgba(247,245,240,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.research-card__meta {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.45);
}

/* --- Event Item --- */
.event-item {
  display: flex;
  gap: var(--sp-6);
  align-items: flex-start;
  padding: var(--sp-6) 0;
  border-bottom: 1px solid var(--c-border-light);
  transition: var(--transition);
}
.event-item:first-child { border-top: 1px solid var(--c-border-light); }
.event-item:hover { background: transparent; }

.event-item__date {
  flex-shrink: 0;
  width: 60px;
  text-align: center;
  padding: var(--sp-3) 0;
}
.event-item__month {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-forest);
}
.event-item__day {
  display: block;
  font-family: var(--f-serif);
  font-size: var(--fs-4xl);
  font-weight: 600;
  line-height: 1;
  color: var(--c-ink);
  margin: var(--sp-1) 0;
}
.event-item__dow {
  display: block;
  font-size: var(--fs-xxs);
  color: var(--c-text-muted);
  letter-spacing: 0.08em;
}

.event-item__content { flex: 1; }
.event-item__title {
  font-family: var(--f-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--sp-2);
  transition: color var(--transition);
  line-height: 1.5;
}
.event-item:hover .event-item__title { color: var(--c-forest); }

.event-item__meta {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--sp-4);
}

/* --- Curated Item --- */
.curated-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--sp-6);
  padding: var(--sp-6);
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-left: 3px solid var(--c-forest);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: border-left-color var(--transition), box-shadow var(--transition);
}
.curated-item:hover {
  border-left-color: var(--c-gold);
  box-shadow: var(--shadow-sm);
}

.curated-item__body { min-width: 0; }
.curated-item__label {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--c-forest);
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-2);
}
.curated-item__title {
  font-family: var(--f-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.5;
  margin-bottom: var(--sp-2);
  transition: color var(--transition);
}
.curated-item:hover .curated-item__title { color: var(--c-forest); }
.curated-item__desc {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ============================================================
   07. Header & Navigation
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  transition: background var(--transition-slow), box-shadow var(--transition-slow);
}

.site-header--transparent {
  background: transparent;
}

.site-header--solid {
  background: rgba(18, 37, 24, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 4px 20px rgba(0,0,0,0.18);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  height: 68px;
  padding: 0 var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

/* Logo */
.site-logo {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  transition: opacity var(--transition);
}
.site-logo:hover { opacity: 0.85; }
.site-logo__mark {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-cream);
  letter-spacing: 0.06em;
}
.site-logo__mark span { color: var(--c-gold-light); }
.site-logo__sub {
  font-family: var(--f-sans);
  font-size: 0.6rem;
  font-weight: 400;
  color: rgba(247,245,240,0.5);
  letter-spacing: 0.14em;
}

/* Desktop Nav */
.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}
.site-nav__link {
  display: block;
  padding: 0.4em 0.6em;
  font-size: var(--fs-sm);
  font-weight: 400;
  color: rgba(247,245,240,0.78);
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.site-nav__link:hover {
  color: var(--c-cream);
  background: rgba(255,255,255,0.06);
}

/* Header Actions */
.site-header__actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: none;
  background: transparent;
  color: rgba(247,245,240,0.7);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.header-btn:hover {
  color: var(--c-cream);
  background: rgba(255,255,255,0.08);
}
.header-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.header-btn--menu { display: none; }

/* Mobile Nav Overlay */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.mobile-nav.is-open {
  pointer-events: auto;
  opacity: 1;
}

.mobile-nav__overlay {
  position: absolute;
  inset: 0;
  background: rgba(12,26,18,0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mobile-nav__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 88vw);
  height: 100%;
  background: var(--c-forest-deep);
  padding: var(--sp-6) var(--sp-8);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}
.mobile-nav.is-open .mobile-nav__panel {
  transform: translateX(0);
}

.mobile-nav__close {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
  margin-bottom: var(--sp-10);
  background: none;
  border: none;
  color: rgba(247,245,240,0.6);
  cursor: pointer;
  transition: color var(--transition);
}
.mobile-nav__close:hover { color: var(--c-cream); }
.mobile-nav__close svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.mobile-nav__list { margin-bottom: var(--sp-10); }
.mobile-nav__item { border-bottom: 1px solid rgba(247,245,240,0.08); }
.mobile-nav__link {
  display: block;
  padding: var(--sp-5) 0;
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: rgba(247,245,240,0.85);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.mobile-nav__link:hover { color: var(--c-gold-light); }

.mobile-nav__sub {
  padding: var(--sp-5) 0 var(--sp-6);
  border-top: 1px solid rgba(247,245,240,0.06);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.mobile-nav__sub a {
  font-size: var(--fs-sm);
  color: rgba(247,245,240,0.5);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.mobile-nav__sub a:hover { color: rgba(247,245,240,0.8); }

/* Search Modal */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.search-modal.is-open {
  pointer-events: auto;
  opacity: 1;
}

.search-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(12,26,18,0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.search-modal__box {
  position: relative;
  width: min(640px, 92vw);
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(-16px);
  transition: transform var(--transition-slow);
}
.search-modal.is-open .search-modal__box {
  transform: translateY(0);
}

.search-modal__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--c-border-light);
}
.search-modal__inner svg { width: 20px; height: 20px; color: var(--c-stone); fill: none; stroke: currentColor; stroke-width: 1.8; flex-shrink: 0; }

.search-modal__input {
  flex: 1;
  border: none;
  outline: none;
  font-size: var(--fs-lg);
  color: var(--c-ink);
  background: transparent;
  font-family: var(--f-sans);
}
.search-modal__input::placeholder { color: var(--c-pebble); }

.search-modal__hint {
  padding: var(--sp-4) var(--sp-6);
  font-size: var(--fs-xs);
  color: var(--c-text-light);
}

/* ============================================================
   08. Hero Section
   ============================================================ */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  overflow: hidden;
  background-color: var(--c-forest-deep);
}

/* Replace this with actual Kyoto photography:
   background-image: url('../images/hero-kyoto.jpg');
   background-size: cover;
   background-position: center;
*/
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 65% 45%, rgba(42,82,66,0.35) 0%, transparent 55%),
    radial-gradient(ellipse at 15% 75%, rgba(30,61,47,0.45) 0%, transparent 50%),
    linear-gradient(158deg, #0c1a12 0%, #182d20 35%, #1e3d2f 62%, #111e16 100%);
}

/* Subtle texture overlay */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 60px,
    rgba(30,61,47,0.08) 60px,
    rgba(30,61,47,0.08) 61px
  );
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}

.hero__content { max-width: 560px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.35em 0.9em;
  background: rgba(140,115,85,0.15);
  border: 1px solid rgba(140,115,85,0.3);
  border-radius: 999px;
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--c-gold-light);
  margin-bottom: var(--sp-6);
}
.hero__badge::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--c-gold-light);
  border-radius: 50%;
  flex-shrink: 0;
}

.hero__headline {
  font-family: var(--f-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 600;
  color: var(--c-cream);
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-6);
}

.hero__headline em {
  font-style: normal;
  color: var(--c-gold-light);
}

.hero__lead {
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  color: rgba(247,245,240,0.68);
  line-height: 1.95;
  margin-bottom: var(--sp-8);
  max-width: 36em;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.hero__articles {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  justify-content: center;
}
.hero__article-card {
  display: block;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: var(--sp-4) 0;
  text-decoration: none;
  transition: opacity var(--transition);
}
.hero__article-card:last-child {
  border-bottom: none;
}
.hero__article-card:hover {
  opacity: 0.75;
}
.hero__article-cat {
  font-size: var(--fs-xxs);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.85);
  display: block;
  margin-bottom: var(--sp-1);
}
.hero__article-cat a {
  color: inherit;
  text-decoration: none;
}
.hero__article-title {
  font-family: var(--f-serif);
  font-size: var(--fs-sm);
  color: rgba(247,245,240,0.9);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hero__scroll {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.35);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  animation: scrollBounce 2.5s ease-in-out infinite;
}
.hero__scroll svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; }

/* ============================================================
   09. Section Regions
   ============================================================ */

/* Site Intro */
.site-intro {
  padding: clamp(4rem, 8vw, 7rem) 0;
  background: var(--c-warm-white);
  border-bottom: 1px solid var(--c-border-light);
}
.site-intro__inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}
.site-intro__label {
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--c-sage);
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.site-intro__title {
  font-family: var(--f-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.45;
  letter-spacing: 0.03em;
  margin-bottom: var(--sp-6);
}
.site-intro__body p {
  font-size: var(--fs-base);
  color: var(--c-text-sub);
  line-height: 1.95;
  margin-bottom: var(--sp-4);
}
.site-intro__body p:last-child { margin-bottom: 0; }
.site-intro__pillars {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}
.site-intro__pillar {
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
}
.site-intro__pillar-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--c-forest);
  color: var(--c-cream);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0;
  margin-top: 0.15em;
}
.site-intro__pillar-title {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: var(--fs-lg);
  color: var(--c-ink);
  margin-bottom: var(--sp-1);
}
.site-intro__pillar-desc {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.75;
}

/* Page hero (for inner pages) */
.page-hero {
  padding: calc(68px + 3rem) var(--gutter) 3.5rem;
  background: var(--c-forest-mid);
}
.page-hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.45);
}
.page-hero__breadcrumb a {
  color: rgba(247,245,240,0.5);
  transition: color var(--transition);
}
.page-hero__breadcrumb a:hover { color: rgba(247,245,240,0.8); }
.page-hero__breadcrumb-sep { color: rgba(247,245,240,0.25); }
.page-hero__label {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-gold-light);
  margin-bottom: var(--sp-3);
}
.page-hero__title {
  font-family: var(--f-serif);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  color: var(--c-cream);
  line-height: 1.4;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-4);
}
.page-hero__desc {
  font-size: var(--fs-base);
  color: rgba(247,245,240,0.65);
  line-height: 1.85;
  max-width: 48em;
}

/* ============================================================
   10. Top Page Sections
   ============================================================ */

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}

.category-item {
  padding: var(--sp-6);
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  position: relative;
  overflow: hidden;
}
.category-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-border);
}
.category-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--cat-color, var(--c-forest));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.category-item:hover::before { transform: scaleX(1); }

.category-item--kyoto    { --cat-color: var(--c-kyoto); }
.category-item--exam     { --cat-color: var(--c-exam); }
.category-item--study    { --cat-color: var(--c-study); }
.category-item--parent   { --cat-color: var(--c-parent); }
.category-item--ai       { --cat-color: var(--c-ai); }
.category-item--research { --cat-color: var(--c-research); }
.category-item--school   { --cat-color: var(--c-school); }
.category-item--exp      { --cat-color: var(--c-exp); }

.category-item__num {
  font-size: var(--fs-xs);
  font-weight: 400;
  color: var(--c-text-light);
  letter-spacing: 0.1em;
}
.category-item__title {
  font-family: var(--f-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
  letter-spacing: 0.02em;
}
.category-item__desc {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.65;
  flex: 1;
}
.category-item__count {
  font-size: var(--fs-xs);
  color: var(--c-text-light);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin-top: auto;
}
.category-item__count span {
  font-weight: 600;
  color: var(--c-text-sub);
}

/* Sort Bar (Archive pages) */
.sort-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--c-border-light);
  font-size: var(--fs-sm);
}
.sort-bar__label {
  font-weight: 600;
  color: var(--c-ink);
}
.sort-btn {
  padding: 0.3em 0.8em;
  border-radius: var(--radius-sm);
  color: var(--c-text-sub);
  transition: color var(--transition), background var(--transition);
}
.sort-btn.is-active {
  color: var(--c-forest);
  font-weight: 600;
}
.result-count {
  margin-left: auto;
  color: var(--c-text-muted);
  font-size: var(--fs-xs);
}

/* Featured Section */
.article-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}

/* Latest by Category */
.category-tabs {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin-bottom: var(--sp-8);
  border-bottom: 1px solid var(--c-border-light);
  padding-bottom: 0;
}
.category-tab {
  padding: 0.5em 1.1em;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.category-tab:hover { color: var(--c-forest); }
.category-tab.is-active {
  color: var(--c-forest);
  border-bottom-color: var(--c-forest);
}

.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.article-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

/* Curated Section */
.curated-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
}

/* Sitemap Navigation */
.sitemap-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}
.sitemap-col__title {
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--c-ink);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--sp-4);
  letter-spacing: 0.03em;
}
.sitemap-col__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.sitemap-col__link {
  font-size: var(--fs-sm);
  color: var(--c-text-sub);
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.sitemap-col__link::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--c-pebble);
  border-radius: 50%;
  flex-shrink: 0;
  transition: background var(--transition);
}
.sitemap-col__link:hover { color: var(--c-forest); }
.sitemap-col__link:hover::before { background: var(--c-forest); }

/* About / Policy Section */
.about-section {
  background: var(--c-paper);
  border-top: 1px solid var(--c-border-light);
  border-bottom: 1px solid var(--c-border-light);
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}
.about-block__title {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--sp-4);
  letter-spacing: 0.03em;
}
.about-block__body {
  font-size: var(--fs-sm);
  color: var(--c-text-sub);
  line-height: 1.9;
}
.about-block__body p { margin-bottom: var(--sp-3); }
.about-block__body p:last-child { margin-bottom: 0; }

/* ============================================================
   11. Footer
   ============================================================ */
.site-footer {
  background: var(--c-forest-deep);
  color: rgba(247,245,240,0.65);
}

.site-footer__main {
  padding: clamp(3.5rem, 7vw, 6rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr 1fr;
  gap: var(--sp-8);
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}
.footer-logo__mark {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-cream);
  letter-spacing: 0.06em;
}
.footer-logo__mark span { color: var(--c-gold-light); }
.footer-logo__sub {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.35);
  letter-spacing: 0.12em;
}
.footer-about {
  font-size: var(--fs-sm);
  color: rgba(247,245,240,0.5);
  line-height: 1.85;
  margin-bottom: var(--sp-6);
}
.footer-aioijuku {
  padding: var(--sp-5);
  border: 1px solid rgba(140,115,85,0.2);
  border-radius: var(--radius-md);
  background: rgba(140,115,85,0.05);
}
.footer-aioijuku__label {
  font-size: var(--fs-xxs);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--c-gold-light);
  margin-bottom: var(--sp-2);
}
.footer-aioijuku__name {
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--c-cream);
  margin-bottom: var(--sp-2);
}
.footer-aioijuku__desc {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.4);
  line-height: 1.7;
}

.footer-col__title {
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247,245,240,0.4);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid rgba(247,245,240,0.07);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.footer-col__link {
  font-size: var(--fs-sm);
  color: rgba(247,245,240,0.55);
  transition: color var(--transition);
  line-height: 1.5;
}
.footer-col__link:hover { color: var(--c-cream); }

.site-footer__bottom {
  border-top: 1px solid rgba(247,245,240,0.07);
  padding: var(--sp-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}
.footer-bottom__links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.footer-bottom__links a {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.35);
  transition: color var(--transition);
}
.footer-bottom__links a:hover { color: rgba(247,245,240,0.6); }
.footer-bottom__copy {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.28);
  letter-spacing: 0.04em;
}

/* ============================================================
   12. Page: Category
   ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-6);
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-8);
  flex-wrap: wrap;
}
.filter-bar__label {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  white-space: nowrap;
}
.filter-bar__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  flex: 1;
}
.filter-tag {
  padding: 0.3em 0.85em;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--c-text-sub);
  background: var(--c-paper);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.filter-tag:hover, .filter-tag.is-active {
  background: var(--c-forest);
  color: var(--c-white);
  border-color: var(--c-forest);
}

.article-grid-full {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-7);
  margin-bottom: var(--sp-12);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
}
.pagination__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-text-sub);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}
.pagination__btn:hover, .pagination__btn.is-active {
  background: var(--c-forest);
  color: var(--c-white);
  border-color: var(--c-forest);
}

/* ============================================================
   13. Page: Article
   ============================================================ */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-16);
}

.article__header { margin-bottom: var(--sp-8); }
.article__category {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}
.article__title {
  font-family: var(--f-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.45;
  letter-spacing: 0.03em;
  margin-bottom: var(--sp-5);
}
.article__summary {
  padding: var(--sp-5) var(--sp-6);
  background: var(--c-paper);
  border-left: 3px solid var(--c-forest);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: var(--fs-base);
  color: var(--c-text-sub);
  line-height: 1.85;
  margin-bottom: var(--sp-6);
}
.article__meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) 0;
  border-top: 1px solid var(--c-border-light);
  border-bottom: 1px solid var(--c-border-light);
  flex-wrap: wrap;
  gap: var(--sp-4);
}
.article__meta-author {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.article__author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-linen);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-serif);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--c-forest);
  flex-shrink: 0;
}
.article__author-name {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-ink);
}
.article__author-title {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
}
.article__meta-info {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  font-size: var(--fs-xs);
  color: var(--c-text-light);
}

.article__hero-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--sp-10);
}
.article__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Article Body */
.article-body {
  font-size: var(--fs-base);
  color: var(--c-text);
  line-height: 1.95;
  letter-spacing: 0.015em;
}
.article-body p { margin-bottom: 1.5em; }
.article-body p:last-child { margin-bottom: 0; }
.article-body h2 {
  font-family: var(--f-serif);
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--c-ink);
  margin: 2.5em 0 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--c-border);
  line-height: 1.4;
  letter-spacing: 0.03em;
}
.article-body h3 {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-ink);
  margin: 2em 0 0.6em;
  padding-left: var(--sp-4);
  border-left: 3px solid var(--c-forest);
  line-height: 1.5;
}
.article-body ul, .article-body ol {
  list-style: disc;
  padding-left: 1.8em;
  margin-bottom: 1.5em;
}
.article-body ul li, .article-body ol li {
  margin-bottom: 0.5em;
  padding-left: 0.3em;
}
.article-body ol { list-style: decimal; }
.article-body blockquote {
  margin: 2em 0;
  padding: var(--sp-5) var(--sp-6);
  background: var(--c-paper);
  border-left: 4px solid var(--c-gold);
  font-style: italic;
  color: var(--c-text-sub);
}
.article-body strong { font-weight: 600; color: var(--c-ink); }
.article-body a {
  color: var(--c-forest);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: color var(--transition);
}
.article-body a:hover { color: var(--c-forest-light); }

/* Article Tags */
.article__tags {
  margin-top: var(--sp-10);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-border-light);
}
.article__tags-title {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  margin-bottom: var(--sp-3);
}

/* Related Articles */
.article-related {
  margin-top: var(--sp-12);
  padding-top: var(--sp-8);
  border-top: 2px solid var(--c-border-light);
}
.article-related__title {
  font-family: var(--f-serif);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: var(--sp-6);
  letter-spacing: 0.03em;
}
.article-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

/* Sidebar */
.article-sidebar { position: sticky; top: 88px; }
.sidebar-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--sp-5);
}
.sidebar-block__title {
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  background: var(--c-paper);
  border-bottom: 1px solid var(--c-border-light);
}
.toc-list {
  padding: var(--sp-4) var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.toc-item a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--c-text-sub);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  line-height: 1.55;
  border-left: 2px solid transparent;
}
.toc-item a:hover, .toc-item.is-active a {
  color: var(--c-forest);
  background: rgba(30,61,47,0.05);
  border-left-color: var(--c-forest);
}
.toc-item--h3 a {
  padding-left: var(--sp-6);
  font-size: var(--fs-xs);
}

/* ============================================================
   14. Animations
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

.js-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-reveal-delay-1 { transition-delay: 0.1s; }
.js-reveal-delay-2 { transition-delay: 0.2s; }
.js-reveal-delay-3 { transition-delay: 0.3s; }

.hero__badge, .hero__headline, .hero__lead, .hero__actions {
  animation: fadeUp 0.8s ease both;
}
.hero__badge    { animation-delay: 0.1s; }
.hero__headline { animation-delay: 0.25s; }
.hero__lead     { animation-delay: 0.4s; }
.hero__actions  { animation-delay: 0.55s; }

/* ============================================================
   15. Responsive
   ============================================================ */

/* Tablet (≤ 1100px) */
@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
  .footer-grid .footer-col:last-child { grid-column: 2; }
}

/* Tablet (≤ 960px) */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__articles { display: none; }
  .hero__content { max-width: 100%; }

  .site-intro__inner { grid-template-columns: 1fr; gap: var(--sp-10); }
  .about-inner { grid-template-columns: 1fr; gap: var(--sp-8); }

  .category-grid { grid-template-columns: repeat(2, 1fr); }

  .article-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .article-grid-full { grid-template-columns: repeat(2, 1fr); }
  .curated-grid { grid-template-columns: 1fr; }
  .sitemap-nav-grid { grid-template-columns: repeat(2, 1fr); }

  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .article-related__grid { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-8); }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
  :root { --gutter: 1.25rem; }

  .site-nav { display: none; }
  .header-btn--menu { display: flex; }

  .article-card--h {
    flex-direction: column;
  }
  .article-card--h .article-card__image {
    width: 100%;
    height: 180px;
  }

  .category-grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-3); }
  .article-grid-3 { grid-template-columns: 1fr; }
  .article-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .article-grid-full { grid-template-columns: 1fr; }
  .article-related__grid { grid-template-columns: 1fr; }

  .category-tabs {
    gap: var(--sp-1);
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--sp-1);
  }

  .footer-grid { grid-template-columns: 1fr; }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-4);
  }

  .article-layout { padding-top: var(--sp-6); padding-bottom: var(--sp-10); }
  .article__meta-bar { flex-direction: column; align-items: flex-start; }

  .filter-bar { flex-direction: column; align-items: flex-start; }

  .section-header--flex {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Small mobile (≤ 480px) */
@media (max-width: 480px) {
  .hero__headline { font-size: 1.75rem; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .category-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
  .sitemap-nav-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   CTA Components — team-aioi.com 送客導線
   ============================================================ */

/* --- Accent Button --- */
.btn--accent {
  background: #c97b2a;
  color: #fff;
  border-color: #c97b2a;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.btn--accent:hover {
  background: #b56820;
  border-color: #b56820;
  color: #fff;
}

/* --- Header CTA Button --- */
.site-header__cta {
  margin-left: var(--sp-1);
}
.site-header__cta.btn--accent {
  font-size: var(--fs-xs);
  padding: 0.55em 1.1em;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

/* --- Mobile Nav CTA --- */
.mobile-nav__cta {
  padding: var(--sp-5) 0 var(--sp-2);
}
.mobile-nav__cta .btn--accent {
  display: block;
  width: 100%;
  text-align: center;
  justify-content: center;
  padding: 0.85em 1rem;
  font-size: var(--fs-sm);
  border-radius: var(--radius-md);
  white-space: normal;
  word-break: keep-all;
}

/* --- CTA Banner (target segmentation) --- */
.cta-banner {
  background: linear-gradient(135deg, var(--c-forest-deep) 0%, var(--c-forest-mid) 65%, #1c3e2c 100%);
  color: var(--c-cream);
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}
.cta-banner__inner {
  text-align: center;
}
.cta-banner__eyebrow {
  display: block;
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold-light);
  margin-bottom: var(--sp-4);
}
.cta-banner__headline {
  font-family: var(--f-serif);
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  font-weight: 600;
  color: var(--c-cream);
  line-height: 1.6;
  margin-bottom: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0.04em;
}
.cta-banner__actions {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--sp-5);
  flex-wrap: wrap;
}
.cta-banner__btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  padding: 1.1em 2.2em;
  min-width: 260px;
  border-radius: var(--radius-md);
  font-family: var(--f-sans);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}
.cta-banner__btn-label {
  font-size: var(--fs-xs);
  font-weight: 400;
  opacity: 0.72;
  letter-spacing: 0.08em;
}
.cta-banner__btn-text {
  font-size: var(--fs-base);
}
.cta-banner__btn--kids {
  background: rgba(255,255,255,0.1);
  color: var(--c-cream);
  border: 1.5px solid rgba(255,255,255,0.32);
}
.cta-banner__btn--kids:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.55);
  color: #fff;
}
.cta-banner__btn--adults {
  background: #c97b2a;
  color: #fff;
  border: 1.5px solid #c97b2a;
}
.cta-banner__btn--adults:hover {
  background: #b56820;
  border-color: #b56820;
}

/* --- Footer Team Aioi Link --- */
.footer-aioi-link {
  margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.footer-aioi-link__text {
  font-size: var(--fs-xs);
  color: rgba(247,245,240,0.52);
  line-height: 1.75;
  margin-bottom: var(--sp-3);
}
.btn--outline-light {
  background: transparent;
  color: var(--c-gold-light);
  border-color: rgba(184,150,110,0.55);
  font-size: var(--fs-xs);
}
.btn--outline-light:hover {
  background: var(--c-gold-light);
  border-color: var(--c-gold-light);
  color: var(--c-forest-deep);
}

/* --- Article End CTA Box --- */
.article-cta-box {
  background: linear-gradient(135deg, var(--c-forest-deep) 0%, #1c3e2c 100%);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3rem) clamp(1.5rem, 4vw, 2.5rem);
  color: var(--c-cream);
  margin: clamp(2.5rem, 6vw, 4rem) 0;
  text-align: center;
}
.article-cta-box__eyebrow {
  display: block;
  font-family: var(--f-sans);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold-light);
  margin-bottom: var(--sp-3);
}
.article-cta-box__title {
  font-family: var(--f-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  font-weight: 600;
  color: var(--c-cream);
  line-height: 1.6;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}
.article-cta-box__actions {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--sp-4);
  flex-wrap: wrap;
}
.article-cta-box__actions .cta-banner__btn {
  min-width: 220px;
}

/* Responsive: CTA components on small screens */
@media (max-width: 600px) {
  .site-header__cta { display: none; }

  .cta-banner__actions,
  .article-cta-box__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-banner__btn,
  .article-cta-box__actions .cta-banner__btn {
    min-width: auto;
    width: 100%;
  }
}