/* ===== Base ===== */
:root{
  --bg: #ffffff;
  --text: #0b1020;
  --muted: #5b6477;
  --line: rgba(15,23,42,.12);

  --brand: #2563eb;
  --brand2: #0ea5e9;
  --accent: #7c3aed;

  --alt: #f6f7fb;

  --radius: 16px;
  --shadow: 0 14px 34px rgba(0,0,0,.10);
  --container: 1100px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

.container{
  width: min(var(--container), 92%);
  margin: 0 auto;
}

/* ===== Header ===== */
.header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
}

.logo{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}
.logo__mark{
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff;
  letter-spacing: .08em;
  font-size: 13px;
}
.logo__text{ font-size: 15px; }

.nav{
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  color: var(--muted);
}
.nav a{ color: var(--muted); }
.nav a:hover{ color: var(--text); text-decoration: none; }

/* ===== Buttons ===== */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: white;
  font-weight: 800;
  box-shadow: 0 12px 22px rgba(37,99,235,.18);
}
.btn:hover{ filter: brightness(1.03); text-decoration: none; }
.btn--ghost{
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,.25);
  box-shadow: none;
}
.btn--small{ padding: 10px 14px; }

/* ===== Hero ===== */
.hero{
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  color: #fff;
}

.hero__bg{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 600px at 10% 12%, rgba(124,58,237,.28), transparent 48%),
    radial-gradient(900px 520px at 88% 28%, rgba(14,165,233,.26), transparent 52%),
    radial-gradient(900px 520px at 70% 85%, rgba(37,99,235,.22), transparent 55%),
    linear-gradient(135deg, #0b1226, #050816);
  transform: scale(1.04);
}

/* “粒(=IPの点)” を散らす */
.hero__bg::after{
  content: "";
  position: absolute;
  inset: -60px;
  background:
    radial-gradient(circle at 20% 25%, rgba(255,255,255,.16) 0 2px, transparent 3px),
    radial-gradient(circle at 55% 18%, rgba(255,255,255,.12) 0 2px, transparent 3px),
    radial-gradient(circle at 78% 38%, rgba(255,255,255,.10) 0 2px, transparent 3px),
    radial-gradient(circle at 35% 70%, rgba(255,255,255,.10) 0 2px, transparent 3px),
    radial-gradient(circle at 70% 78%, rgba(255,255,255,.12) 0 2px, transparent 3px);
  opacity: .9;
  filter: blur(.2px);
}

.hero__inner{
  position: relative;
  padding: 78px 0 56px;
  max-width: 860px;
}

.badge{
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.86);
  font-size: 13px;
  margin: 0 0 12px;
}

.hero h1{
  margin: 0 0 10px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero__lead{
  margin: 0 0 22px;
  color: rgba(230,235,255,.88);
  font-size: 16px;
}

.hero__actions{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

/* 小さな特徴ブロック */
.hero__stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat{
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  border-radius: 14px;
  padding: 12px 12px;
  backdrop-filter: blur(8px);
}
.stat__num{
  font-weight: 900;
  letter-spacing: .12em;
  color: rgba(255,255,255,.85);
  font-size: 12px;
}
.stat__label{
  margin-top: 4px;
  font-weight: 800;
  color: rgba(255,255,255,.92);
}

/* ===== Sections ===== */
.section{
  padding: 72px 0;
}
.section--alt{
  background:
    radial-gradient(600px 320px at 0% 0%, rgba(37,99,235,.10), transparent 55%),
    radial-gradient(520px 280px at 100% 10%, rgba(124,58,237,.08), transparent 55%),
    var(--alt);
}

.section__title{
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: -0.01em;
}
.section__text{
  margin: 0 0 18px;
  color: var(--muted);
}
.section__text--center{
  text-align: center;
  max-width: 720px;
  margin: 0 auto 26px;
}

.grid-2{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 26px;
  align-items: center;
}

/* ===== Checklist ===== */
.checklist{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.checklist li{
  padding-left: 28px;
  position: relative;
}
.checklist li::before{
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(37,99,235,.12);
  color: var(--brand);
  font-weight: 900;
}

/* ===== Design Boxes (photo-less “image”) ===== */
.design-box{
  position: relative;
  height: 280px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  background: #fff;
}

/* About: “層”と“流れ” */
.design-box--about{
  background:
    radial-gradient(220px 180px at 20% 30%, rgba(37,99,235,.18), transparent 60%),
    radial-gradient(220px 180px at 70% 60%, rgba(14,165,233,.16), transparent 60%),
    linear-gradient(135deg, rgba(124,58,237,.12), transparent 55%),
    repeating-linear-gradient(
      45deg,
      rgba(15,23,42,.06),
      rgba(15,23,42,.06) 2px,
      transparent 2px,
      transparent 10px
    );
}

/* 走るライン＝発信 */
.design-box--about::after{
  content: "";
  position: absolute;
  inset: -40px;
  background:
    linear-gradient(90deg, transparent 0 40%, rgba(37,99,235,.18) 50%, transparent 60%),
    linear-gradient(90deg, transparent 0 55%, rgba(14,165,233,.14) 62%, transparent 70%),
    linear-gradient(90deg, transparent 0 20%, rgba(124,58,237,.12) 30%, transparent 40%);
  transform: rotate(-12deg);
  opacity: .9;
}

/* Company: “格子”と“ノード” */
.design-box--company{
  background:
    radial-gradient(circle at 22% 32%, rgba(37,99,235,.22) 0 6px, transparent 7px),
    radial-gradient(circle at 48% 52%, rgba(14,165,233,.20) 0 6px, transparent 7px),
    radial-gradient(circle at 76% 35%, rgba(124,58,237,.18) 0 6px, transparent 7px),
    radial-gradient(circle at 70% 78%, rgba(37,99,235,.16) 0 6px, transparent 7px),
    repeating-linear-gradient(
      0deg,
      rgba(15,23,42,.06) 0 1px,
      transparent 1px 18px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(15,23,42,.06) 0 1px,
      transparent 1px 18px
    ),
    linear-gradient(135deg, rgba(14,165,233,.10), rgba(124,58,237,.08));
}

.design-box::before{
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 14px;
  border: 1px solid rgba(15,23,42,.10);
  background: rgba(255,255,255,.45);
}

/* ===== Cards ===== */
.cards{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card{
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.card__top{
  height: 150px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

/* それぞれ雰囲気を変える */
.card__top--ip{
  background:
    radial-gradient(220px 140px at 30% 40%, rgba(37,99,235,.30), transparent 60%),
    linear-gradient(135deg, #0b1226, #050816);
}
.card__top--dist{
  background:
    radial-gradient(220px 140px at 70% 35%, rgba(14,165,233,.30), transparent 60%),
    linear-gradient(135deg, #0b1226, #050816);
}
.card__top--global{
  background:
    radial-gradient(220px 140px at 55% 65%, rgba(124,58,237,.30), transparent 60%),
    linear-gradient(135deg, #0b1226, #050816);
}

.card__top::after{
  content: "";
  position: absolute;
  inset: -30px;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(255,255,255,.10) 0 2px,
      transparent 2px 10px
    );
  opacity: .55;
  transform: rotate(10deg);
}

.card__icon{
  width: 84px;
  height: 84px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-weight: 900;
  letter-spacing: .18em;
  color: #fff;
  border: 1px solid rgba(255,255,255,.20);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
}

.card__body{
  padding: 16px 16px 18px;
}
.card h3{
  margin: 0 0 6px;
  font-size: 18px;
}
.card p{
  margin: 0 0 10px;
  color: var(--muted);
}
.card ul{
  margin: 0;
  padding-left: 18px;
  color: #2b3447;
}

/* ===== Definition List ===== */
.dl{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.dl__row{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}
.dl__row:first-child{ border-top: 0; }
.dl dt{
  color: var(--muted);
  font-weight: 800;
}
.dl dd{ margin: 0; }

/* ===== Contact ===== */
.contact{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: start;
}
.contact__meta p{ margin: 0 0 6px; color: #2b3447; }

.contact__badge{
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background:
    radial-gradient(260px 120px at 20% 20%, rgba(37,99,235,.10), transparent 60%),
    rgba(255,255,255,.8);
}
.contact__badge span{
  display: inline-block;
  font-weight: 900;
  letter-spacing: .12em;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.contact__badge p{
  margin: 0;
  color: #2b3447;
  font-size: 14px;
}

/* ===== Form ===== */
.form{
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.form label{
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  font-weight: 800;
  font-size: 14px;
}
.form input,
.form textarea{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font: inherit;
  outline: none;
}
.form input:focus,
.form textarea:focus{
  border-color: rgba(37,99,235,.55);
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}
.form__note{
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--muted);
}

/* ===== Footer ===== */
.footer{
  border-top: 1px solid var(--line);
  padding: 20px 0;
  background: #fff;
}
.footer__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
}
.to-top{
  color: var(--muted);
  font-size: 14px;
}

/* ===== Responsive ===== */
@media (max-width: 900px){
  .cards{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .contact{ grid-template-columns: 1fr; }
  .dl__row{ grid-template-columns: 120px 1fr; }
  .hero__stats{ grid-template-columns: 1fr; }
}

@media (max-width: 520px){
  .nav{ display: none; } /* 必要ならハンバーガーに */
  .hero__inner{ padding: 62px 0 44px; }
}