/* =========================================================
   プラスワイズ様 EC一気通貫運用提案
   Arks Japan株式会社 — Design System
   ========================================================= */

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  color: #1F2937;
  background: #FFFFFF;
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "palt" 1;
}
a { color: #13315C; text-decoration: none; transition: color .2s; }
a:hover { color: #E87722; }
img { max-width: 100%; height: auto; display: block; }

/* ===== Color Tokens =====
   --navy:         #13315C  メイン色（紺）
   --navy-deep:    #0B1F3A  深紺
   --navy-soft:    #1F4A87  ソフト紺
   --orange:       #E87722  アクセント（オレンジ）
   --orange-soft:  #FFB774  柔らかオレンジ
   --orange-bg:    #FFF4E8  オレンジ薄背景
   --green:        #2E8540  サブ：緑
   --green-bg:     #EAF4EC  緑薄背景
   --red:          #C8362F  サブ：赤
   --red-bg:       #FBEAE9  赤薄背景
   --blue:         #1F6FBE  サブ：青
   --blue-bg:      #E8F0FA  青薄背景
   --cream:        #FAF6EE  クリーム背景
   --gray-50:      #F8F9FB
   --gray-100:     #F4F2EE  カード背景
   --gray-200:     #E5E7EB  罫線
   --gray-300:     #D1D5DB  罫線
   --gray-500:     #6B7280  補助テキスト
   --gray-700:     #374151
=========================================================== */

:root {
  --navy: #13315C;
  --navy-deep: #0B1F3A;
  --navy-soft: #1F4A87;
  --orange: #E87722;
  --orange-soft: #FFB774;
  --orange-bg: #FFF4E8;
  --green: #2E8540;
  --green-bg: #EAF4EC;
  --red: #C8362F;
  --red-bg: #FBEAE9;
  --blue: #1F6FBE;
  --blue-bg: #E8F0FA;
  --cream: #FAF6EE;
  --gray-50: #F8F9FB;
  --gray-100: #F4F2EE;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-500: #6B7280;
  --gray-700: #374151;
  --shadow-sm: 0 2px 8px rgba(19, 49, 92, .06);
  --shadow: 0 4px 16px rgba(19, 49, 92, .08);
  --shadow-lg: 0 8px 32px rgba(19, 49, 92, .12);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.sp-only { display: none; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(11, 31, 58, 0.96);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .04em;
}
.brand-sub {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  font-weight: 400;
}
.nav {
  display: flex;
  gap: 24px;
}
.nav a {
  color: rgba(255,255,255,.82);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .02em;
}
.nav a:hover { color: var(--orange-soft); }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 180px 0 140px;
  background: linear-gradient(135deg, #0B1F3A 0%, #13315C 60%, #1F4A87 100%);
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(232,119,34,.18) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255,255,255,.06) 0%, transparent 35%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; max-width: 1100px; }
.hero-meta {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .2em;
  color: rgba(255,255,255,.75);
  padding: 8px 18px;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 999px;
  margin-bottom: 36px;
  font-weight: 500;
}
.hero-title {
  font-weight: 700;
  font-size: clamp(36px, 5.5vw, 64px);
  line-height: 1.25;
  margin: 0 0 32px;
  letter-spacing: .01em;
}
.hero-title .accent { color: var(--orange-soft); }
.hero-sub {
  font-size: clamp(17px, 1.8vw, 22px);
  font-weight: 400;
  color: rgba(255,255,255,.92);
  margin: 0 0 56px;
  line-height: 1.75;
}
.hero-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding: 28px 32px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  margin-bottom: 48px;
}
.info-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.info-label {
  font-size: 11px;
  letter-spacing: .15em;
  color: rgba(255,255,255,.6);
  text-transform: uppercase;
  font-weight: 500;
}
.info-value {
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  letter-spacing: .01em;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 16px 36px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  transition: all .2s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: #D06616; color: #fff; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(232,119,34,.4); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.1); color: #fff; }

/* ===== Section base ===== */
.section {
  padding: 120px 0;
}
.section-light { background: #FFFFFF; }
.section-cream { background: var(--cream); }
.section-dark { background: var(--navy-deep); color: #E6EBF2; }
.section-dark a { color: var(--orange-soft); }

.section-head {
  text-align: center;
  margin-bottom: 80px;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--orange);
  font-weight: 700;
  margin-bottom: 18px;
}
.eyebrow-light { color: var(--orange-soft); }
.section-title {
  font-weight: 700;
  font-size: clamp(26px, 3.5vw, 40px);
  line-height: 1.4;
  margin: 0 0 24px;
  color: inherit;
  letter-spacing: .01em;
}
.section-lead {
  font-size: 17px;
  max-width: 780px;
  margin: 0 auto;
  color: inherit;
  opacity: .82;
  line-height: 1.85;
}

/* =========================================================
   Section 2: Challenge Cards
   ========================================================= */
.challenge-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  margin-bottom: 48px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.challenge-head {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 32px 40px;
  background: linear-gradient(90deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: #fff;
}
.challenge-no {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--orange-soft);
  padding-right: 24px;
  border-right: 1px solid rgba(255,255,255,.25);
}
.challenge-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
  line-height: 1.5;
  letter-spacing: .01em;
}
.challenge-body {
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.challenge-text { color: var(--gray-700); }
.lead-text {
  font-size: 17px;
  margin-top: 0;
  line-height: 1.85;
}
.lead-text strong { color: var(--navy); }
.hl {
  background: linear-gradient(transparent 60%, #FFE6CC 60%);
  font-weight: 700;
  padding: 0 2px;
}
.challenge-text p { line-height: 1.85; }

.callout {
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--gray-50);
  border-left: 4px solid var(--navy);
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.8;
}
.callout strong { color: var(--navy); }
.callout-warn {
  background: var(--orange-bg);
  border-left-color: var(--orange);
}
.callout-warn strong { color: var(--orange); }

.dot-list {
  padding-left: 0;
  margin: 18px 0;
  list-style: none;
}
.dot-list li {
  margin-bottom: 12px;
  line-height: 1.85;
  padding-left: 24px;
  position: relative;
}
.dot-list li::before {
  content: "";
  position: absolute;
  left: 6px; top: 12px;
  width: 6px; height: 6px;
  background: var(--orange);
  border-radius: 50%;
}

.numbered-list {
  padding-left: 22px;
  margin: 16px 0;
}
.numbered-list li {
  margin-bottom: 18px;
  line-height: 1.85;
}
.numbered-list li strong { color: var(--orange); }

/* =========================================================
   Figure 1: MakeShop Architecture + 商品マスタ2パターン
   ========================================================= */
.figure-block {
  margin: 32px 0 8px;
  padding: 32px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
}
.figure-block-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .08em;
  margin: 0 0 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--navy);
  display: inline-block;
}

/* Architecture: 3列フロー */
.arch-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 8px;
}
.arch-node {
  background: #fff;
  border: 2px solid var(--navy);
  border-radius: 12px;
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}
.arch-node-label {
  font-size: 11px;
  color: var(--gray-500);
  letter-spacing: .15em;
  margin-bottom: 8px;
  font-weight: 500;
}
.arch-node-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  margin-bottom: 6px;
}
.arch-node-sub {
  font-size: 12px;
  color: var(--gray-500);
  line-height: 1.6;
}
.arch-node-malls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
  padding: 4px 0;
}
.arch-mall {
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  padding: 8px 12px;
  background: var(--gray-50);
  border-radius: 6px;
  border-left: 3px solid var(--orange);
}
.arch-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy-soft);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
}
.arch-arrow span {
  display: inline-block;
  line-height: 1;
}

/* 商品マスタ2パターン */
.master-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}
.master-pattern {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 24px;
  position: relative;
}
.master-pattern-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.master-pattern-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--navy);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  border-radius: 4px;
}
.master-pattern.is-b .master-pattern-tag {
  background: var(--orange);
}
.master-pattern-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
  margin: 0;
}
.master-pattern p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-700);
  margin: 0 0 10px;
}
.master-pattern-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}
.master-pattern-list li {
  font-size: 13px;
  line-height: 1.7;
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
  color: var(--gray-700);
}
.master-pattern-list li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: var(--green);
  font-weight: 700;
}
.figure-caption {
  margin-top: 18px;
  text-align: center;
  font-size: 13px;
  color: var(--gray-500);
}

/* =========================================================
   Figure 2: SKU 3パターン
   ========================================================= */
.sku-3pattern {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}
.sku-pattern {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.sku-pattern.is-main {
  border: 2px solid var(--orange);
  background: linear-gradient(180deg, var(--orange-bg) 0%, #fff 30%);
  box-shadow: var(--shadow);
}
.sku-pattern-star {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--orange);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: .08em;
}
.sku-pattern-head {
  text-align: center;
  margin-bottom: 18px;
}
.sku-pattern-no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange);
  margin-bottom: 4px;
}
.sku-pattern-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
  margin: 0;
}
.sku-flow {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}
.sku-flow-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--gray-50);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--gray-700);
}
.sku-flow-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
}
.sku-flow-icon.ai { background: var(--orange); }
.sku-flow-icon.person { background: var(--navy); }
.sku-flow-icon.arks { background: var(--green); }
.sku-flow-arrow {
  text-align: center;
  color: var(--gray-300);
  font-size: 11px;
  line-height: 1;
}
.sku-pattern-bar {
  margin: 6px 0 14px;
}
.sku-pattern-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--gray-500);
  margin-bottom: 4px;
}
.sku-pattern-bar-track {
  display: flex;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  background: var(--gray-100);
}
.sku-pattern-bar-fill {
  height: 100%;
}
.sku-pattern-bar-fill.ai { background: var(--orange); }
.sku-pattern-bar-fill.person { background: var(--navy); }
.sku-pattern-bar-fill.arks { background: var(--green); }
.sku-pattern-target {
  font-size: 12px;
  color: var(--gray-500);
  padding: 10px 12px;
  background: var(--gray-50);
  border-radius: 6px;
  line-height: 1.6;
  text-align: center;
  margin-top: auto;
}
.sku-pattern-target strong {
  color: var(--navy);
  font-weight: 700;
}

/* =========================================================
   Figure 3: 広告データ統合PDCAフロー
   ========================================================= */
.pdca-flow {
  display: grid;
  grid-template-columns: 1fr auto 1.4fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  margin-bottom: 20px;
}
.pdca-col {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px;
  padding: 22px 20px;
}
.pdca-col-label {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange-soft);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}
.pdca-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 500;
  color: #E6EBF2;
  line-height: 1.5;
}
.pdca-item:last-child { margin-bottom: 0; }
.pdca-item-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--orange-soft);
  margin-bottom: 4px;
}
.pdca-item-sub {
  font-size: 12px;
  color: rgba(230,235,242,.7);
  line-height: 1.5;
}
.pdca-process-engine {
  background: linear-gradient(135deg, var(--orange) 0%, #D06616 100%);
  border: none;
  text-align: center;
  padding: 10px 14px;
  font-weight: 700;
  margin-bottom: 14px;
  font-size: 14px;
  color: #fff;
  border-radius: 8px;
}
.pdca-process-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.pdca-process-grid .pdca-item {
  margin-bottom: 0;
  padding: 10px 12px;
  font-size: 12px;
}
.pdca-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange-soft);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}
.pdca-band {
  background: rgba(232,119,34,.12);
  border-left: 3px solid var(--orange);
  padding: 14px 20px;
  border-radius: 6px;
  font-size: 13px;
  color: #E6EBF2;
  line-height: 1.7;
}
.pdca-band strong { color: var(--orange-soft); }

/* =========================================================
   Figure 4: レビュー1ソース → 4活用
   ========================================================= */
.review-uses {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.review-engine {
  background: linear-gradient(135deg, var(--orange) 0%, #D06616 100%);
  color: #fff;
  border-radius: 12px;
  padding: 24px 28px;
  text-align: center;
}
.review-engine-sources {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.review-engine-source {
  background: rgba(255,255,255,.2);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}
.review-engine-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: .02em;
}
.review-engine-sub {
  font-size: 12px;
  opacity: .9;
  line-height: 1.7;
}
.review-engine-axes {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.review-engine-axis {
  background: rgba(0,0,0,.25);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}
.review-arrow-down {
  text-align: center;
  color: rgba(255,255,255,.4);
  font-size: 20px;
  line-height: 1;
}
.section-dark .review-arrow-down { color: rgba(255,255,255,.3); }
.review-uses-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.review-use-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 10px;
  padding: 18px 16px;
  text-align: left;
}
.review-use-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: var(--orange);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 12px;
}
.review-use-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--orange-soft);
  margin-bottom: 6px;
  line-height: 1.5;
}
.review-use-text {
  font-size: 12px;
  color: rgba(230,235,242,.85);
  line-height: 1.7;
}

/* =========================================================
   Section 3: Opportunities
   ========================================================= */
.opportunity-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  padding: 48px 44px;
  margin-bottom: 36px;
  position: relative;
}
.opp-tag {
  position: absolute;
  top: -22px;
  left: 36px;
  background: var(--orange);
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(232,119,34,.4);
}
.opp-title {
  font-size: 24px;
  margin: 0 0 28px 64px;
  color: #fff;
  font-weight: 700;
  line-height: 1.4;
}
.opp-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.opp-text { color: #D6DCE6; }
.opp-text p { line-height: 1.85; }
.opp-text strong { color: var(--orange-soft); }
.note-box {
  margin-top: 20px;
  padding: 18px 22px;
  background: rgba(232,119,34,.12);
  border-left: 3px solid var(--orange);
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.75;
}
.note-box-dark {
  background: rgba(255,255,255,.06);
  border-left-color: var(--orange-soft);
}

/* AIサムネバナー Before/After 比較画像 */
.thumbnail-compare {
  margin: 28px 0 0;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(0,0,0,.18);
}
.thumbnail-compare img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}
.thumbnail-compare figcaption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: #4B5563;
  text-align: center;
}

/* =========================================================
   Section 4: Trial Menu
   ========================================================= */
.trial-categories {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.trial-cat-legend {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-700);
  font-weight: 500;
}
.trial-cat-dot {
  width: 14px; height: 14px;
  border-radius: 4px;
}
.trial-cat-dot.creative { background: var(--blue); }
.trial-cat-dot.data { background: var(--orange); }
.trial-cat-dot.infra { background: var(--gray-500); }

.trial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.trial-item {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 32px 28px;
  transition: transform .2s, box-shadow .2s;
  border-top: 4px solid var(--gray-300);
  position: relative;
  display: flex;
  flex-direction: column;
}
.trial-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.trial-item.cat-creative { border-top-color: var(--blue); }
.trial-item.cat-data { border-top-color: var(--orange); }
.trial-item.cat-infra { border-top-color: var(--gray-500); }
.trial-cat-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: .08em;
  margin-bottom: 14px;
  color: #fff;
  align-self: flex-start;
}
.trial-item.cat-creative .trial-cat-tag { background: var(--blue); }
.trial-item.cat-data .trial-cat-tag { background: var(--orange); }
.trial-item.cat-infra .trial-cat-tag { background: var(--gray-500); }
.trial-num {
  font-weight: 700;
  font-size: 14px;
  color: var(--navy);
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.trial-item h3 {
  font-size: 17px;
  margin: 0 0 14px;
  color: var(--navy);
  line-height: 1.5;
  font-weight: 700;
}
.trial-item p {
  margin: 0;
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.85;
}

/* =========================================================
   Section 5: Preview
   ========================================================= */
.preview-block {
  background: #fff;
  border-radius: 16px;
  padding: 56px 48px;
  margin-bottom: 48px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.preview-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 20px;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 16px;
  line-height: 1.5;
  flex-wrap: wrap;
}
.preview-no {
  background: var(--navy);
  color: #fff;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 6px;
  letter-spacing: .05em;
  font-weight: 700;
}
.preview-text {
  font-size: 16px;
  color: var(--gray-700);
  margin: 0 0 32px;
  line-height: 1.85;
}
.preview-text strong { color: var(--navy); }

.sub-block { margin-top: 40px; }
.sub-block:first-child { margin-top: 0; }
.sub-block-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 18px;
  padding: 10px 16px;
  background: var(--gray-50);
  border-left: 4px solid var(--orange);
  border-radius: 0 6px 6px 0;
  line-height: 1.5;
}
.sub-block-sub {
  font-size: 14px;
  color: var(--gray-500);
  margin: -10px 0 18px;
}

/* 商品マスタテーブル */
.master-table-wrap {
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  overflow: hidden;
}
.master-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.master-table thead th {
  background: var(--navy);
  color: #fff;
  text-align: left;
  padding: 14px 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}
.master-table thead th:last-child {
  width: 88px;
  text-align: center;
}
.master-table tbody td {
  padding: 12px 18px;
  border-top: 1px solid var(--gray-200);
  line-height: 1.7;
  vertical-align: top;
  color: var(--gray-700);
}
.master-table tbody tr:nth-child(even) { background: var(--gray-50); }
.master-table tbody td:first-child {
  font-weight: 700;
  color: var(--navy);
  white-space: nowrap;
  width: 220px;
}
.master-table tbody td.ai-col {
  text-align: center;
  color: var(--gray-300);
}
.ai-badge {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: .04em;
}

/* 8チャネル fanout */
.fanout-layout {
  display: grid;
  grid-template-columns: 220px 80px 1fr;
  gap: 16px;
  align-items: center;
}
.fanout-source {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.fanout-source-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .08em;
  text-align: center;
}
.fanout-source-card {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: #fff;
  border-radius: 10px;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.fsc-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.fsc-row:last-child { border-bottom: none; }
.fsc-k {
  color: rgba(255,255,255,.6);
  font-weight: 500;
}
.fsc-v {
  color: #fff;
  font-weight: 700;
}
.fanout-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--orange);
}
.fanout-arrow-label {
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  letter-spacing: .04em;
  line-height: 1.4;
}
.fanout-arrow-mark {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}
.fanout-targets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.fanout-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 12px 12px;
  transition: border-color .2s, box-shadow .2s;
}
.fanout-card:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow-sm);
}
.fanout-card-head {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
  line-height: 1.4;
}
.fanout-card-sub {
  font-size: 11px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Footer band */
.footer-band {
  margin-top: 22px;
  padding: 16px 22px;
  background: var(--navy);
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.75;
  text-align: center;
}
.footer-band-orange {
  background: var(--orange);
}

/* 4モール mall-grid */
.mall-grid {
  display: grid;
  gap: 16px;
}
.mall-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.mall-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px 18px;
  border-top: 4px solid var(--gray-300);
}
.mall-card.mall-rakuten { border-top-color: #BF0000; }
.mall-card.mall-amazon { border-top-color: #FF9900; }
.mall-card.mall-yahoo { border-top-color: #6E2BAB; }
.mall-card.mall-tiktok { border-top-color: #000000; }
.mall-card-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.mall-card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  background: var(--gray-100);
  color: var(--gray-700);
  border-radius: 4px;
  margin-bottom: 14px;
  letter-spacing: .04em;
}
.mall-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mall-card-list li {
  font-size: 13px;
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
  color: var(--gray-700);
}
.mall-card-list li::before {
  content: "•";
  color: var(--orange);
  font-weight: 700;
  position: absolute;
  left: 4px;
}

/* タイトルサンプル */
.title-sample {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 14px;
}
.title-sample-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.title-sample-mall {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}
.title-sample-count {
  font-size: 12px;
  color: var(--gray-500);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.title-sample-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-700);
  padding: 14px 16px;
  background: #fff;
  border-radius: 6px;
  border: 1px solid var(--gray-200);
  margin-bottom: 12px;
}
.title-sample-point {
  font-size: 12px;
  color: var(--gray-500);
  line-height: 1.65;
  display: flex;
  gap: 6px;
  align-items: flex-start;
}
.title-sample-point::before {
  content: "POINT";
  flex-shrink: 0;
  font-weight: 700;
  background: var(--orange);
  color: #fff;
  padding: 2px 6px;
  font-size: 10px;
  border-radius: 3px;
  letter-spacing: .04em;
  line-height: 1.4;
}
.char-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}
.char-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green) 0%, #4FA664 100%);
  border-radius: 3px;
}

/* 効果カード */
.effect-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.effect-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 24px 22px;
  text-align: center;
}
.effect-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  background: var(--navy);
  color: #fff;
  border-radius: 50%;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 14px;
}
.effect-head {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
  line-height: 1.5;
}
.effect-text {
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.75;
}

/* 3stepフロー */
.flow-3step {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 24px;
}
.flow-3step-label {
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .08em;
  margin-bottom: 18px;
}
.flow-3step-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
}
.flow-3step-item {
  flex: 1;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}
.flow-3step-no {
  font-size: 11px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .12em;
}
.flow-3step-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
}
.flow-3step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange);
  font-size: 18px;
  font-weight: 700;
}

/* KPI row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}
.kpi-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 18px 20px;
  text-align: center;
}
.kpi-label {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gray-500);
  margin-bottom: 8px;
  font-weight: 700;
}
.kpi-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
  line-height: 1.2;
}
.kpi-unit { font-size: 16px; color: var(--orange); margin-left: 2px; }
.kpi-sub {
  font-size: 11px;
  color: var(--gray-500);
  line-height: 1.5;
}

/* レビュー2カラム */
.review-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.review-col {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 22px 24px;
}
.review-col-good {
  background: var(--green-bg);
  border-color: #C7E2CB;
}
.review-col-good .review-col-head { color: var(--green); }
.review-col-bad {
  background: var(--red-bg);
  border-color: #F0CECB;
}
.review-col-bad .review-col-head { color: var(--red); }
.review-col-head {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--navy);
}
.review-list {
  list-style: none;
  counter-reset: rev;
  padding: 0;
  margin: 0;
}
.review-list li {
  counter-increment: rev;
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--gray-200);
  align-items: start;
  font-size: 14px;
  line-height: 1.7;
}
.review-list li::before {
  content: counter(rev);
  background: #fff;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  border-radius: 50%;
  width: 24px; height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}
.review-col-good .review-list li::before {
  background: var(--green); color: #fff; border-color: var(--green);
}
.review-col-bad .review-list li::before {
  background: var(--red); color: #fff; border-color: var(--red);
}
.review-list li:last-child { border-bottom: none; }
.review-text {
  color: var(--gray-700);
  font-weight: 500;
}
.review-count {
  font-size: 12px;
  color: var(--gray-500);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.review-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 4px;
  flex-wrap: wrap;
}
.next-action {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  background: var(--orange);
  color: #fff;
  border-radius: 3px;
  letter-spacing: .04em;
}

/* Voice / FAQ */
.voice-list, .faq-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.voice-list li {
  background: var(--orange-bg);
  border-left: 3px solid var(--orange);
  padding: 14px 16px;
  border-radius: 0 6px 6px 0;
}
.voice-source {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 700;
}
.voice-mall {
  background: var(--navy);
  color: #fff;
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: .04em;
}
.voice-star {
  color: var(--orange);
  letter-spacing: .04em;
}
.voice-quote {
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: 6px;
  font-weight: 500;
}
.voice-arrow {
  font-size: 11px;
  color: var(--orange);
  font-weight: 700;
  margin-bottom: 4px;
}
.voice-copy {
  font-size: 14px;
  color: var(--navy);
  font-weight: 700;
  background: #fff;
  padding: 8px 12px;
  border-radius: 4px;
  line-height: 1.6;
}
.faq-list li {
  background: var(--blue-bg);
  border-left: 3px solid var(--blue);
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
}
.faq-q, .faq-a {
  font-size: 13px;
  line-height: 1.7;
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 8px;
  align-items: start;
}
.faq-q { color: var(--navy); font-weight: 700; margin-bottom: 4px; }
.faq-a { color: var(--gray-700); }
.faq-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.faq-q .faq-mark { background: var(--blue); }
.faq-a .faq-mark { background: var(--gray-500); }

/* =========================================================
   Section 6: Checklist
   ========================================================= */
.checklist {
  list-style: none;
  padding: 0;
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 22px 26px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  font-size: 15px;
  line-height: 1.75;
  transition: background .2s;
}
.checklist li:hover { background: rgba(255,255,255,.08); }
.check {
  flex-shrink: 0;
  color: var(--orange-soft);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border: 2px solid var(--orange-soft);
  border-radius: 4px;
}

/* =========================================================
   Section 7: Contact
   ========================================================= */
.contact-card {
  max-width: 760px;
  margin: 0 auto;
  background: linear-gradient(135deg, #fff 0%, var(--cream) 100%);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 56px 48px;
  box-shadow: var(--shadow);
}
.contact-company {
  text-align: center;
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--gray-200);
}
.contact-logo {
  font-weight: 700;
  font-size: 26px;
  color: var(--navy);
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.contact-company-name {
  font-size: 14px;
  color: var(--gray-500);
}
.contact-rows {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  align-items: baseline;
  font-size: 15px;
}
.contact-label {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray-500);
  font-weight: 700;
}
.contact-value {
  color: var(--gray-700);
  font-weight: 500;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,.5);
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1023px) {
  .nav { display: none; }
  .section { padding: 96px 0; }
  .container { padding: 0 24px; }
  .arch-flow {
    grid-template-columns: 1fr;
  }
  .arch-arrow { transform: rotate(90deg); }
  .sku-3pattern {
    grid-template-columns: 1fr;
  }
  .pdca-flow {
    grid-template-columns: 1fr;
  }
  .pdca-arrow { transform: rotate(90deg); }
  .review-uses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .fanout-layout {
    grid-template-columns: 1fr;
  }
  .fanout-arrow { transform: rotate(90deg); padding: 16px 0; }
  .fanout-targets { grid-template-columns: repeat(2, 1fr); }
  .mall-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .effect-grid { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .review-2col { grid-template-columns: 1fr; }
  .master-2col { grid-template-columns: 1fr; }
  .preview-block { padding: 40px 32px; }
  .flow-3step-row { flex-direction: column; }
  .flow-3step-arrow { transform: rotate(90deg); padding: 4px 0; }
}

@media (max-width: 767px) {
  .sp-only { display: inline; }
  .section { padding: 72px 0; }
  .hero { padding: 140px 0 90px; }
  .container { padding: 0 20px; }
  .hero-title { font-size: 32px; }
  .section-head { margin-bottom: 56px; }
  .section-title { font-size: 24px; }
  .section-lead { font-size: 15px; }
  .challenge-head { flex-direction: column; align-items: flex-start; gap: 10px; padding: 24px 24px; }
  .challenge-no { border-right: none; padding-right: 0; padding-bottom: 4px; }
  .challenge-body { padding: 28px 24px; }
  .challenge-title { font-size: 18px; }
  .opportunity-card { padding: 40px 24px; }
  .opp-title { margin-left: 0; margin-top: 16px; font-size: 20px; }
  .opp-tag { left: 24px; }
  .preview-block { padding: 32px 24px; }
  .preview-title { font-size: 18px; }
  .preview-no { font-size: 12px; }
  .contact-card { padding: 36px 24px; }
  .contact-row { grid-template-columns: 1fr; gap: 4px; }
  .contact-label { font-size: 11px; }
  .header-inner { padding: 14px 20px; }
  .brand-sub { display: none; }
  .fanout-targets { grid-template-columns: 1fr; }
  .review-uses-grid { grid-template-columns: 1fr; }
  .mall-grid-4 { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: 1fr 1fr; }
  .master-table thead th, .master-table tbody td { padding: 10px 12px; font-size: 13px; }
  .master-table tbody td:first-child { width: 130px; }
  .figure-block { padding: 24px 18px; }
}