* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Noto Sans JP", "Segoe UI", sans-serif;
}

body {
  color: #1a1a1a;
  line-height: 1.7;
  background: #fff;
}

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

.container {
  width: 1200px;
  max-width: 92%;
  margin: auto;
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid #eee;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: #0b2a4a;
}

nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
}

nav a {
  font-size: 14px;
  font-weight: 500;
  color: #333;
}

/* ===== Hero ===== */
.hero {
  height: 70vh;
  background: url("images/hero.jpg") center/cover no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  margin-top: 72px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11,42,74,0.1), rgba(11,42,74,0));
}

.hero-content {
  position: absolute;
  top: 20%;
  left: 20%;
  color: #fff;
  max-width: 680px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero p {
  font-size: 18px;
}

/* ===== Section ===== */
.section {
  padding: 90px 0;
}

.section-title {
  font-size: 28px;
  color: #0b2a4a;
  margin-bottom: 40px;
  padding-left: 14px;
}

/* ===== Grid ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: #fff;
  border: 1px solid #e6e6e6;
  border-radius: 12px;
  padding: 28px;
  transition: 0.3s;
}

.card:hover {
  box-shadow: 0 18px 40px rgba(0,0,0,0.08);
}

/* ===== Footer ===== */
footer {
  background: #0b2a4a;
  color: #fff;
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
}