/* ============================================================
   AMK LiveStream — 受注LP（アニメ × ライブ × EC）
   ターゲット: EC・D2C事業者
   ============================================================ */
:root {
  --bg: #07090f;
  --bg2: #0c1018;
  --panel: #11151f;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f2f4f8;
  --muted: #9aa3b5;
  --blue: #2547ff;
  --cyan: #38c8ff;
  --violet: #8a5cff;
  --pink: #ff3d7f;
  --amber: #ffb648;
  --grad: linear-gradient(120deg, #38c8ff 0%, #2547ff 38%, #8a5cff 68%, #ff3d7f 100%);
  --font-en: "Outfit", sans-serif;
  --font-jp: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.en { font-family: var(--font-en); letter-spacing: 0.08em; }
.container { width: min(1080px, 92%); margin: 0 auto; }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ ヘッダー（LP用・ナビ無し） ============ */
.lp-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 12px 0;
  background: rgba(7, 9, 15, 0.85);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.lp-header-inner {
  width: min(1200px, 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 44px; }
.brand-name { font-family: var(--font-en); font-weight: 700; font-size: 0.98rem; letter-spacing: 0.1em; }
.brand-name small { display: block; font-size: 0.56rem; color: var(--muted); letter-spacing: 0.28em; }

/* ============ ボタン ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 40px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: transform 0.3s, opacity 0.3s, background 0.3s;
  cursor: pointer;
}
.btn:hover { transform: translateY(-3px); opacity: 0.9; }
.btn-grad { background: var(--grad); color: #fff; box-shadow: 0 8px 30px rgba(94, 78, 255, 0.4); }
.btn-ghost { border: 1px solid rgba(255, 255, 255, 0.3); }
.btn-sm { padding: 10px 26px; font-size: 0.88rem; }
.btn-lg { padding: 20px 56px; font-size: 1.08rem; }
.btn-note { display: block; margin-top: 12px; font-size: 0.8rem; color: var(--muted); }

/* ============ FV ============ */
.fv {
  position: relative;
  min-height: 92svh;
  display: flex;
  align-items: center;
  padding: 130px 0 80px;
  overflow: hidden;
  isolation: isolate;
}
.fv::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background: url("../assets/art_anime.svg") right -140px center / cover no-repeat;
  opacity: 0.5;
}
.fv::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 65% 80% at 22% 45%, rgba(7, 9, 15, 0.94), rgba(7, 9, 15, 0.55) 70%, rgba(7, 9, 15, 0.3)),
    radial-gradient(ellipse 40% 50% at 88% 90%, rgba(255, 61, 127, 0.2), transparent);
}
.fv-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid rgba(56, 200, 255, 0.45);
  border-radius: 999px;
  padding: 6px 18px;
  margin-bottom: 26px;
}
.fv-title {
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: 0.06em;
}
.fv-title .u-anime { color: var(--cyan); }
.fv-title .u-live { color: var(--pink); }
.fv-lead {
  margin-top: 26px;
  max-width: 640px;
  color: #cdd4e2;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
}
.fv-cta { margin-top: 40px; }
.fv-points { margin-top: 34px; display: flex; gap: 12px 26px; flex-wrap: wrap; }
.fv-points li {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.fv-points li::before {
  content: "✓";
  color: var(--cyan);
  font-weight: 700;
}

/* ============ セクション共通 ============ */
section { padding: 96px 0; position: relative; }
.sec-head { text-align: center; margin-bottom: 54px; }
.sec-en {
  display: block;
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.32em;
  margin-bottom: 12px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sec-title { font-size: clamp(1.5rem, 3.4vw, 2.2rem); font-weight: 900; letter-spacing: 0.08em; line-height: 1.6; }
.sec-lead { margin-top: 18px; color: var(--muted); max-width: 700px; margin-inline: auto; }

/* ============ 課題 ============ */
.problem { background: var(--bg2); }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.problem-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 34px 28px;
  text-align: center;
}
.problem-card .p-icon { font-size: 2rem; display: block; margin-bottom: 14px; }
.problem-card h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: 0.06em; line-height: 1.8; }
.problem-card p { margin-top: 10px; color: var(--muted); font-size: 0.88rem; }
.problem-arrow {
  text-align: center;
  margin-top: 46px;
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}
.problem-arrow .down {
  display: block;
  font-size: 1.8rem;
  margin-top: 8px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ ソリューション（連動ファネル） ============ */
.funnel-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
}
.funnel-step {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 38px 28px 32px;
  overflow: hidden;
}
.funnel-step::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 4px;
}
.funnel-step.f-anime::before { background: linear-gradient(90deg, var(--cyan), var(--blue)); }
.funnel-step.f-live::before { background: linear-gradient(90deg, var(--violet), var(--pink)); }
.funnel-step.f-ec::before { background: linear-gradient(90deg, var(--pink), var(--amber)); }
.funnel-num {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--muted);
}
.funnel-name {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: 0.08em;
  margin: 6px 0 2px;
}
.f-anime .funnel-name { color: var(--cyan); }
.f-live .funnel-name { color: var(--pink); }
.f-ec .funnel-name { color: var(--amber); }
.funnel-role { font-weight: 700; font-size: 0.95rem; letter-spacing: 0.12em; margin-bottom: 14px; }
.funnel-step p { color: var(--muted); font-size: 0.9rem; }
.funnel-joint {
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--violet);
}
.funnel-note {
  margin-top: 40px;
  text-align: center;
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  letter-spacing: 0.1em;
}

/* ============ 選ばれる理由 ============ */
.reasons { background: var(--bg2); }
.reason-list { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.reason-item {
  display: flex;
  gap: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 30px 30px;
}
.reason-num {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.9rem;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  flex-shrink: 0;
}
.reason-item h3 { font-size: 1.05rem; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 8px; }
.reason-item p { color: var(--muted); font-size: 0.9rem; }

/* ============ プラン ============ */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
}
.plan-card.featured {
  border: 2px solid transparent;
  background:
    linear-gradient(var(--panel), var(--panel)) padding-box,
    var(--grad) border-box;
  transform: scale(1.03);
}
.plan-tag {
  position: absolute;
  top: -14px; left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  padding: 5px 18px;
  border-radius: 999px;
  white-space: nowrap;
}
.plan-name { font-family: var(--font-en); font-weight: 800; font-size: 1.05rem; letter-spacing: 0.18em; color: var(--muted); }
.plan-title { font-size: 1.2rem; font-weight: 900; letter-spacing: 0.08em; margin: 8px 0 18px; }
.plan-price { font-weight: 900; margin-bottom: 4px; }
.plan-price strong { font-family: var(--font-en); font-size: 2rem; letter-spacing: 0.02em; }
.plan-price span { font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.plan-note { font-size: 0.78rem; color: var(--muted); margin-bottom: 20px; }
.plan-card ul { border-top: 1px solid var(--line); padding-top: 20px; display: grid; gap: 10px; flex-grow: 1; }
.plan-card li {
  font-size: 0.88rem;
  color: #cdd4e2;
  padding-left: 24px;
  position: relative;
}
.plan-card li::before {
  content: "✓";
  position: absolute; left: 0;
  color: var(--cyan);
  font-weight: 700;
}
.plan-disclaimer { margin-top: 30px; text-align: center; color: var(--muted); font-size: 0.82rem; }

/* ============ 活用シーン ============ */
.usecase { background: var(--bg2); }
.usecase-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.usecase-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 34px 28px;
}
.usecase-card .u-icon { font-size: 2rem; display: block; margin-bottom: 14px; }
.usecase-card h3 { font-size: 1.02rem; font-weight: 700; letter-spacing: 0.06em; margin-bottom: 10px; }
.usecase-card p { color: var(--muted); font-size: 0.88rem; }

/* ============ フロー ============ */
.flow-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: step; }
.flow-step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 20px;
  counter-increment: step;
}
.flow-step::before {
  content: "0" counter(step);
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.4rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  margin-bottom: 10px;
}
.flow-step h4 { font-size: 0.92rem; letter-spacing: 0.06em; margin-bottom: 6px; }
.flow-step p { color: var(--muted); font-size: 0.8rem; }

/* ============ FAQ ============ */
.faq { background: var(--bg2); }
.faq-list { max-width: 780px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 22px 56px 22px 26px;
  font-weight: 700;
  font-size: 0.95rem;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: "Q."; color: var(--cyan); font-family: var(--font-en); font-weight: 800; margin-right: 12px; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 24px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-en);
  font-size: 1.3rem;
  color: var(--muted);
  transition: transform 0.3s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item .faq-a {
  padding: 0 26px 24px;
  color: var(--muted);
  font-size: 0.9rem;
}
.faq-item .faq-a::before { content: "A."; color: var(--pink); font-family: var(--font-en); font-weight: 800; margin-right: 12px; }

/* ============ 会社概要（コンパクト） ============ */
.lp-company-table { max-width: 640px; margin: 0 auto; width: 100%; border-collapse: collapse; }
.lp-company-table th, .lp-company-table td {
  text-align: left;
  padding: 14px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
  font-weight: 500;
  vertical-align: top;
}
.lp-company-table th { width: 7em; color: var(--muted); font-weight: 700; white-space: nowrap; }

/* ============ クロージングCTA ============ */
.closing {
  text-align: center;
  background:
    radial-gradient(ellipse 70% 120% at 50% 130%, rgba(255, 61, 127, 0.2), transparent),
    radial-gradient(ellipse 60% 100% at 20% -20%, rgba(37, 71, 255, 0.18), transparent),
    var(--bg2);
  padding: 110px 0;
}
.closing-title { font-size: clamp(1.4rem, 3.2vw, 2.1rem); font-weight: 900; letter-spacing: 0.1em; line-height: 1.8; }
.closing-lead { margin: 18px auto 36px; color: var(--muted); max-width: 640px; }

/* ============ フッター ============ */
.lp-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  text-align: center;
}
.lp-footer .footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 16px; flex-wrap: wrap; }
.lp-footer .footer-links a { font-size: 0.8rem; color: var(--muted); }
.lp-footer .footer-links a:hover { color: var(--text); }
.lp-footer .copyright { color: var(--muted); font-size: 0.72rem; letter-spacing: 0.1em; }

/* ============ 追従CTA（モバイル） ============ */
.sticky-cta {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 90;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: rgba(7, 9, 15, 0.92);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  display: none;
}
.sticky-cta .btn { width: 100%; }

/* ============ Reveal ============ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  section { padding: 72px 0; }
  .problem-grid, .usecase-grid { grid-template-columns: 1fr; }
  .funnel-flow { grid-template-columns: 1fr; }
  .funnel-joint { transform: rotate(90deg); padding: 2px 0; }
  .reason-list { grid-template-columns: 1fr; }
  .plan-grid { grid-template-columns: 1fr; gap: 30px; }
  .plan-card.featured { transform: none; }
  .flow-steps { grid-template-columns: 1fr 1fr; }
  .sticky-cta { display: block; }
  body { padding-bottom: 84px; }
  .fv { min-height: auto; }
}
@media (max-width: 540px) {
  .flow-steps { grid-template-columns: 1fr; }
  .lp-header .btn-sm { padding: 9px 18px; font-size: 0.8rem; }
}