:root {
  --navy: #142c46;
  --navy-deep: #0e2136;
  --blue: #1f6198;
  --blue-mid: #2d76ae;
  --blue-light: #5b8fc0;
  --blue-pale: #eef3f8;
  --gray-bg: #e3e3e3;
  --text: #1f2a33;
  --text-light: #ffffff;
  --max-width: 1200px;
  --max-width-tight: 1080px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--text);
  line-height: 1.8;
  background: #ffffff;
}

img {
  max-width: 100%;
  display: block;
}

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

ul, ol {
  list-style: none;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 90px 24px;
}

.section-inner--tight {
  max-width: var(--max-width-tight);
}

.sp-only {
  display: none;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid #e8e8e8;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.site-nav ul {
  display: flex;
  gap: 28px;
}

.site-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.site-nav a:hover {
  color: var(--blue);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--navy);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: var(--navy-deep);
}

.hero-image {
  position: relative;
  width: 100%;
  aspect-ratio: 1672 / 941;
  background:
    linear-gradient(rgba(20, 44, 70, 0.12), rgba(20, 44, 70, 0.12)),
    url("../images/hero.png");
  background-size: cover;
  background-position: center;
}

.hero-copy {
  position: absolute;
  left: 0;
  right: 0;
  top: 30%;
  text-align: center;
  color: var(--text-light);
  font-size: 44px;
  font-weight: 700;
  letter-spacing: 2px;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.55), 0 0 24px rgba(0, 0, 0, 0.35);
  padding: 0 24px;
}

/* ---------- Section titles ---------- */

.section-title {
  text-align: left;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--navy);
  margin-bottom: 56px;
  line-height: 1.25;
}

.section-title--light {
  color: var(--text-light);
}

.section-title--center {
  text-align: center;
}

.section-title-jp {
  display: block;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 3px;
  margin-top: 10px;
  color: var(--text);
}

.section-title--light .section-title-jp {
  color: var(--text-light);
}

/* ---------- Philosophy ---------- */

.philosophy .section-inner {
  padding-bottom: 40px;
}

.philosophy-item {
  background: #ffffff;
}

.philosophy-item--blue {
  background: var(--blue);
}

.philosophy-inner {
  max-width: var(--max-width-tight);
  margin: 0 auto;
  padding: 44px 24px;
  text-align: center;
}

.philosophy-item--blue .philosophy-inner {
  color: var(--text-light);
}

.philosophy-head {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.philosophy-text {
  font-size: 15px;
  line-height: 1.9;
  opacity: 0.95;
}

/* ---------- Business ---------- */

.business .section-inner {
  padding-bottom: 40px;
}

.business-band {
  background: #ffffff;
  border-top: 1px solid #e5e5e5;
  border-bottom: 1px solid #e5e5e5;
}

.business-list {
  max-width: var(--max-width-tight);
  margin: 0 auto;
  padding: 60px 24px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.business-item {
  display: flex;
  gap: 40px;
  align-items: center;
}

.business-thumb {
  flex: 0 0 260px;
  height: 170px;
  background: var(--gray-bg);
  background-size: cover;
  background-position: center;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(20, 44, 70, 0.18);
}

.business-thumb--import {
  background-image: url("../images/business-import.png");
}

.business-thumb--sales {
  background-image: url("../images/business-sales.png");
}

.business-thumb--appliance {
  background-image: url("../images/business-appliance.png");
}

.business-body {
  flex: 1;
  color: var(--text);
}

.business-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  text-align: center;
  margin-bottom: 14px;
  color: var(--navy);
}

.business-text {
  font-size: 15px;
  line-height: 1.9;
  color: #40505d;
}

/* ---------- Message ---------- */

.message {
  background: var(--blue);
  color: var(--text-light);
  text-align: center;
}

.message .section-title {
  margin-bottom: 40px;
}

.message-text {
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 2;
}

.message-text p + p {
  margin-top: 20px;
}

/* ---------- Guidelines ---------- */

.guidelines {
  background: #ffffff;
}

.guidelines-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.guideline-item {
  background: var(--blue);
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 10px 24px rgba(20, 44, 70, 0.18);
}

.guideline-head {
  display: inline-block;
  font-weight: 700;
  font-size: 17px;
  color: var(--text-light);
  padding-bottom: 8px;
  border-bottom: 3px solid rgba(255, 255, 255, 0.55);
  margin-bottom: 18px;
}

.guideline-text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
}

/* ---------- Profile ---------- */

.profile-table {
  width: 100%;
  border-collapse: collapse;
}

.profile-table th,
.profile-table td {
  text-align: left;
  padding: 20px 16px;
  border-bottom: 1px solid #e0e0e0;
  font-size: 15px;
  vertical-align: top;
}

.profile-table th {
  width: 160px;
  color: var(--blue);
  font-weight: 700;
  letter-spacing: 1px;
}

.profile-table td {
  color: var(--text);
}

/* ---------- Contact ---------- */

.contact-form {
  max-width: 660px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 32px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  border: none;
  border-radius: 2px;
  padding: 14px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--navy);
  background: var(--blue-pale);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(20, 44, 70, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--navy);
  outline-offset: 1px;
}

.submit-btn {
  align-self: center;
  min-width: 240px;
  margin-top: 8px;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-light);
  background: var(--blue);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.submit-btn:hover {
  background: var(--navy);
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-status {
  min-height: 1.4em;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
}

.form-status.is-error {
  color: #c0392b;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  font-size: 12px;
  padding: 24px;
}

/* ================= Responsive ================= */

@media (max-width: 900px) {
  .section-inner {
    padding: 64px 20px;
  }

  .section-title {
    font-size: 28px;
  }

  .business-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .business-thumb {
    flex: none;
    width: 100%;
  }

  .business-title {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .sp-only {
    display: inline;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #e8e8e8;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav.is-open {
    max-height: 400px;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding: 14px 24px;
    border-bottom: 1px solid #f0f0f0;
  }

  .hero-copy {
    font-size: 26px;
    letter-spacing: 1px;
  }

  .guidelines-list {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .philosophy-head {
    font-size: 18px;
  }

  .message-sign {
    text-align: center;
    padding: 22px 24px;
  }

  .profile-table th {
    width: 110px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 24px;
  }

  .profile-table th,
  .profile-table td {
    display: block;
    width: 100%;
    padding: 8px 4px;
    border-bottom: none;
  }

  .profile-table tr {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid #e0e0e0;
  }
}