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

body {
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    background: #000000;
    color: #e8e0c8;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

#header {
    position: relative;
    height: 52vh;
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

/*背景スライド*/
#header .header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;

    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    z-index: -2;
}

#header .header-bg.active {
    opacity: 1;
}

#header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: -1;
}

/*タイトル*/
#header h1 {
    font-size: clamp(28px, 4.5vw, 48px);
    letter-spacing: 2px;
    font-weight: 700;
    text-shadow: 0 4px 30px rgba(212,180,106,0.4);
    color: #d4b46a;
}

#menu {
    background: rgba(10,10,12,0.95);
    border-bottom: 1px solid rgba(212,180,106,0.25);
    display: flex;
    gap: 26px;
    justify-content: center;
    padding: 14px 10px;
    position: sticky;
    top: 0;
    z-index: 60;
}

#menu a {
    color: #d4b46a;
    text-decoration: none;
    font-weight: 600;
    transition: 250ms;
}

#menu a:hover {
    color: #fff;
    text-shadow: 0 0 12px rgba(212,180,106,0.9);
}

.box {
    max-width: 900px;
    margin: 46px auto;
    padding: 26px 24px;

    background: linear-gradient(170deg, rgba(32,32,36,0.5), rgba(15,10,8,0.55));
    border: 1px solid rgba(212,180,106,0.25);

    border-radius: 8px;
    box-shadow: 0 4px 22px rgba(0,0,0,0.6);
}

.box h2 {
    color: #d4b46a;
    margin-bottom: 10px;
    font-size: 22px;
    border-left: 4px solid #d4b46a;
    padding-left: 12px;
    letter-spacing: 1px;
}

.example-img {
    width: 100%;
    max-width: 440px;
    display: block;
    margin: 18px 0;
    border-radius: 4px;
    border: 1px solid rgba(212,180,106,0.25);
    box-shadow: 0 8px 28px rgba(0,0,0,0.75);
    transition: 250ms;
}

.example-img:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 36px rgba(212,180,106,0.4);
}

.bo-ru-img {
    width: 100%;
    display: block;
    border: 1px solid rgba(212,180,106,0.25);
    margin-top: 30px;
}

.fadein {
    opacity: 0;
    transform: translateY(24px);
    transition: all 0.8s ease-out;
}

.fadein.active {
    opacity: 1;
    transform: translateY(0);
}

.yellowheart-img {
    width: 100%;
    /* セクション幅に合わす */
    max-width: 900px;
    height: auto;
    display: block;
    margin: 24px auto;
  
    /* 高級 */
    background: #000;
    padding: 10px;
    border: 1px solid rgba(212,180,106,0.35);
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
  }
.cue {
    background: radial-gradient(
        ellipse at center,
        rgba(40,40,40,0.9) 0%,
        rgba(15,15,15,0.95) 55%,
        rgba(5,5,5,1) 100%
    );
  
    padding: 24px 20px;
    margin-top: 20px;
  
    border: 1px solid rgba(212,180,106,0.35);
    box-shadow:
      inset 0 0 40px rgba(0,0,0,0.9),
      0 12px 36px rgba(0,0,0,0.8);
  
    border-radius: 6px;
  }

  .yellowheart-img {
    width: 100%;
    max-width: 900px;
    height: auto;
    display: block;
    margin: 0 auto;
  
    background: transparent;
  }

.cue-item {
    margin: 40px 0 70px;
    text-align: center;
  }

  .cue-item img {
    width: 100%;
    max-width: 1100px;
    height: auto;
    display: block;
    margin: 0 auto;
  }

  .cue-label {
    display: inline-block;
    margin-top: 18px;
    padding: 10px 28px;
  
    border: 1px solid rgba(212,180,106,0.7);
    color: #d4b46a;
  
    font-size: 14px;
    letter-spacing: 1px;
    background: #000000;
  
    box-shadow:
      inset 0 0 18px rgba(0,0,0,0.8),
      0 0 12px rgba(212,180,106,0.25);
  }
  .kansou-link {
    text-align: center;
    margin: 60px 0 40px;
    font-size: 16px;
    color: #ccc;
}

.kansou-link a {
    color: #d4b46a;
    font-weight: 700;
    text-decoration: none;
    padding: 4px 10px;
    border-bottom: 1px solid rgba(212,180,106,0.6);
    transition: all 0.25s ease;
}

.kansou-link a:hover {
    color: #fff;
    text-shadow: 0 0 10px rgba(212,180,106,0.9);
    border-bottom-color: #d4b46a;
}