/* ===========================
   青木商事 共通スタイル
   =========================== */

:root {
  --green: #1f4f3a;       /* security.aokishoji.com 共通ブランドグリーン */
  --green-dark: #163b2a;
  --green-light: #e7efe9;
  --black: #141414;
  --gray-dark: #333333;
  --gray-mid: #60646c;
  --gray-light: #f3f1ec;  /* 暖色系グレー */
  --white: #ffffff;
  --bg: #faf9f6;          /* 暖色系オフホワイト */
  --border: #e7e4dd;
  --max-width: 860px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-dark);
  background: var(--bg);
}

a {
  color: var(--green-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ===========================
   ヘッダー
   =========================== */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 2px solid var(--border);
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

@media (max-width: 768px) {
  .logo-img { height: 32px; }
}

.logo-aoki {
  background: var(--black);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 8px;
  letter-spacing: 0.08em;
}

.logo-shoji {
  background: var(--green);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 8px;
  letter-spacing: 0.08em;
}

nav {
  display: flex;
  align-items: center;
}

nav a {
  font-size: 13px;
  font-weight: 600;
  color: #2f3a3a;
  text-decoration: none;
  white-space: nowrap;
  opacity: .85;
  padding-left: 14px;
  margin-left: 12px;
  border-left: 1px solid var(--border);
}

nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

nav a.active {
  color: var(--green);
  opacity: 1;
}

/* ハンバーガー */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-dark);
  transition: all 0.3s;
}

/* ===========================
   メインコンテンツ共通
   =========================== */

main {
  margin-top: 64px;
}

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

/* ===========================
   セクション共通
   =========================== */

.section {
  padding: 72px 0;
}

.section--gray {
  background: var(--gray-light);
}

.section-label {
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-mid);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--black);
  line-height: 1.5;
  margin-bottom: 24px;
}

.section-title--lg {
  font-size: 30px;
}

.section-lead {
  font-size: 16px;
  color: var(--gray-mid);
  line-height: 1.9;
  margin-bottom: 40px;
}

/* ===========================
   ボタン
   =========================== */

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 10px;
  text-decoration: none;
  transition: opacity 0.2s;
  cursor: pointer;
  border: none;
}

.btn:hover {
  opacity: 0.85;
  text-decoration: none;
}

.btn--green {
  background: var(--green);
  color: var(--white);
}

.btn--outline {
  background: transparent;
  color: var(--green-dark);
  border: 2px solid var(--green);
}

.btn--black {
  background: var(--black);
  color: var(--white);
}

.btn--lg {
  padding: 18px 48px;
  font-size: 16px;
}

/* ===========================
   フッター
   =========================== */

footer {
  background: var(--black);
  color: #aaa;
  padding: 40px 0;
  font-size: 13px;
}

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

.footer-company {
  color: var(--white);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-address {
  margin-bottom: 16px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #aaa;
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--white);
}

.footer-copy {
  border-top: 1px solid #333;
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
}

/* ===========================
   見出しフォント（セリフ体）
   =========================== */

.hero-title,
.page-hero-title {
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
}

/* ===========================
   ダミー画像プレースホルダー
   =========================== */

.img-placeholder {
  background: #e8e8e8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 14px;
  border: 2px dashed #ccc;
}

/* ===========================
   レスポンシブ
   =========================== */

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  nav .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 16px 24px;
    gap: 14px;
    border-bottom: 2px solid var(--border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }

  nav .nav-links.open {
    display: flex;
  }

  nav .nav-links a {
    border-left: none;
    margin-left: 0;
    padding-left: 0;
    font-size: 14px;
  }

  .section-title {
    font-size: 22px;
  }

  .section-title--lg {
    font-size: 26px;
  }

  .section {
    padding: 56px 0;
  }
}