:root{
    --canvas:#EDE6D2;
    --canvas-deep:#E2D9BE;
    --forest:#232B1E;
    --forest-deep:#161C12;
    --olive:#4F5D3A;
    --olive-deep:#39432A;
    --ember:#C1481E;
    --ember-deep:#9B3714;
    --khaki-line:#B5A97B;
    --ink:#221F17;
    --ink-soft:#5C5645;
    --paper:#F6F1E4;
    --radius-tag: 2px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--canvas);
    color:var(--ink);
    font-family:"Noto Sans JP", sans-serif;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;
    color:var(--forest);
    margin:0;
    line-height:1.4;
  }
  .num{font-family:"Oswald",sans-serif; letter-spacing:0.02em;}
  a{color:inherit; text-decoration:none;}
  ul{margin:0;padding:0;list-style:none;}
  img{max-width:100%; display:block;}
  .wrap{max-width:1080px; margin:0 auto; padding:0 28px;}
  section{position:relative;}

  /* topo pattern */
  .topo-bg{
    background-image:
      repeating-radial-gradient(circle at 15% 30%, transparent 0, transparent 38px, rgba(181,169,123,0.35) 39px, rgba(181,169,123,0.35) 40px, transparent 41px),
      repeating-radial-gradient(circle at 85% 70%, transparent 0, transparent 52px, rgba(181,169,123,0.28) 53px, rgba(181,169,123,0.28) 54px, transparent 55px);
    background-size: 100% 100%;
  }

  .trail-divider{
    height:2px;
    background-image: repeating-linear-gradient(90deg, var(--khaki-line) 0 10px, transparent 10px 18px);
    margin: 0 auto;
    max-width:1080px;
  }

  /* ---------- header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(237,230,210,0.92);
    backdrop-filter: blur(6px);
    border-bottom:1px solid var(--khaki-line);
  }
  .nav-row{
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 28px;
    max-width:1080px; margin:0 auto;
  }
  .logo{
    display:flex; align-items:center; gap:10px;
    font-family:"Zen Kaku Gothic New",sans-serif;
    font-weight:900; font-size:1.25rem; color:var(--forest);
  }
  .logo-mark{
    width:34px;height:34px;flex:none;
  }
  .logo small{
    display:block; font-family:"Oswald",sans-serif; font-size:0.55rem;
    letter-spacing:0.18em; color:var(--ember); font-weight:500;
  }
  nav.links{display:flex; gap:28px; align-items:center;}
  nav.links a{
    font-size:0.92rem; font-weight:500; color:var(--ink-soft);
    padding:4px 0; border-bottom:2px solid transparent;
    transition:border-color .2s, color .2s;
  }
  nav.links a:hover{color:var(--forest); border-color:var(--ember);}
  .btn-entry{
    background:var(--ember); color:var(--paper) !important; font-weight:700;
    padding:10px 20px; border:none; cursor:pointer; font-size:0.9rem;
    clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  }
  .btn-entry:hover{background:var(--ember-deep);}
  .menu-toggle{display:none; background:none; border:none; cursor:pointer; padding:4px;}
  .menu-toggle span{display:block; width:24px; height:2px; background:var(--forest); margin:5px 0;}

  /* ---------- hero ---------- */
  .hero{
    position:relative;
    min-height:88vh;
    display:flex; align-items:center;
    overflow:hidden;
    background:
      linear-gradient(115deg, var(--olive) 0%, var(--olive) 46%, var(--forest-deep) 54%, var(--forest-deep) 100%);
  }
  .hero::before{
    content:"";
    position:absolute; inset:0;
    background-image: repeating-linear-gradient(0deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 34px),
                       repeating-linear-gradient(90deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 34px);
    mix-blend-mode:overlay;
  }
  .hero::after{
    content:"";
    position:absolute; right:6%; top:50%; transform:translateY(-50%);
    width:260px; height:260px; border-radius:50%;
    background: radial-gradient(circle, rgba(193,72,30,0.9) 0%, rgba(193,72,30,0.35) 45%, transparent 72%);
    filter: blur(2px);
  }
  .hero-inner{
    position:relative; z-index:2;
    max-width:1080px; margin:0 auto; padding:100px 28px 80px;
    width:100%;
  }
  .hero-badge{
    display:inline-flex; gap:10px; align-items:center;
    color:var(--canvas); font-size:0.8rem; letter-spacing:0.08em;
    border:1px solid rgba(246,241,228,0.5); padding:6px 14px;
    margin-bottom:28px;
  }
  .hero-badge b{color:var(--ember);}
  .hero h1{
    color:var(--paper);
    font-size:clamp(2.1rem, 5vw, 3.4rem);
    font-weight:900;
    max-width:15ch;
    margin-bottom:22px;
  }
  .hero p.lead{
    color:rgba(246,241,228,0.86);
    font-size:1.05rem;
    max-width:44ch;
    margin-bottom:36px;
  }
  .hero-meta{
    display:flex; flex-wrap:wrap; gap:34px;
    margin-bottom:40px;
  }
  .hero-meta div{color:var(--canvas);}
  .hero-meta span{
    display:block; font-size:0.72rem; letter-spacing:0.1em; color:rgba(246,241,228,0.6); margin-bottom:4px;
  }
  .hero-meta strong{font-size:1.05rem; font-weight:700;}
  .hero-cta{display:flex; gap:16px; flex-wrap:wrap;}
  .btn-ghost{
    border:1px solid rgba(246,241,228,0.55); color:var(--paper);
    padding:13px 26px; font-weight:600; font-size:0.92rem;
  }
  .btn-ghost:hover{border-color:var(--paper); background:rgba(246,241,228,0.08);}
  .btn-primary{
    background:var(--ember); color:var(--paper); font-weight:700;
    padding:13px 30px; font-size:0.92rem; border:none; cursor:pointer;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  }
  .btn-primary:hover{background:var(--ember-deep);}

  /* ---------- section heading ---------- */
  .section-head{
    display:flex; align-items:baseline; gap:16px;
    margin-bottom:42px;
  }
  .section-head .idx{
    font-family:"Oswald",sans-serif; font-size:0.85rem; color:var(--ember); font-weight:600;
  }
  .section-head h2{font-size:1.7rem; font-weight:900;}
  section.pad{padding:88px 0;}

  /* ---------- concept split ---------- */
  .concept-grid{
    display:grid; grid-template-columns:1fr 1fr; gap:0;
    border:1px solid var(--khaki-line);
  }
  .concept-card{
    padding:44px 38px;
    position:relative;
  }
  .concept-card.day{background:var(--paper); color:var(--ink);}
  .concept-card.night{background:var(--forest); color:var(--paper);}
  .concept-card + .concept-card{border-left:1px dashed var(--khaki-line);}
  .concept-tag{
    font-family:"Oswald",sans-serif; font-size:0.75rem; letter-spacing:0.14em;
    margin-bottom:14px; display:inline-block;
  }
  .concept-card.day .concept-tag{color:var(--olive-deep);}
  .concept-card.night .concept-tag{color:var(--ember);}
  .concept-card h3{font-size:1.35rem; margin-bottom:14px;}
  .concept-card.night h3{color:var(--paper);}
  .concept-card p{color:var(--ink-soft); font-size:0.95rem; max-width:36ch;}
  .concept-card.night p{color:rgba(246,241,228,0.78);}

  /* ---------- overview table ---------- */
  .overview-table{width:100%; border-collapse:collapse;}
  .overview-table tr{border-bottom:1px dashed var(--khaki-line);}
  .overview-table tr:first-child{border-top:1px dashed var(--khaki-line);}
  .overview-table th, .overview-table td{
    text-align:left; padding:20px 10px; vertical-align:top;
  }
  .overview-table th{
    width:150px; font-weight:700; color:var(--olive-deep);
    font-family:"Zen Kaku Gothic New",sans-serif; font-size:0.95rem;
  }
  .overview-table td{font-size:0.95rem; color:var(--ink);}

  /* ---------- timeline ---------- */
  .day-tabs{display:flex; gap:10px; margin-bottom:36px;}
  .day-tab{
    padding:10px 22px; border:1px solid var(--olive); background:transparent;
    font-weight:700; font-family:"Zen Kaku Gothic New",sans-serif; cursor:pointer; color:var(--olive-deep);
    font-size:0.92rem;
  }
  .day-tab.active{background:var(--olive); color:var(--paper);}
  .timeline{position:relative; padding-left:26px;}
  .timeline::before{
    content:""; position:absolute; left:5px; top:6px; bottom:6px; width:2px;
    background-image: repeating-linear-gradient(0deg, var(--khaki-line) 0 6px, transparent 6px 11px);
  }
  .t-item{position:relative; padding-bottom:30px;}
  .t-item:last-child{padding-bottom:0;}
  .t-item::before{
    content:""; position:absolute; left:-26px; top:4px; width:11px; height:11px; border-radius:50%;
    background:var(--ember); border:2px solid var(--paper); box-shadow:0 0 0 1px var(--ember);
  }
  .t-time{font-family:"Oswald",sans-serif; font-weight:600; color:var(--olive-deep); font-size:1rem;}
  .t-label{font-weight:700; margin-top:2px;}
  .t-desc{font-size:0.88rem; color:var(--ink-soft); margin-top:4px; max-width:52ch;}
  .day-panel{display:none;}
  .day-panel.active{display:block;}

  /* ---------- news ---------- */
  .news-board{
    background:var(--canvas-deep);
    border:1px solid var(--khaki-line);
    padding:8px;
  }
  .news-item{
    display:grid; grid-template-columns:110px 90px 1fr;
    gap:20px; align-items:start;
    padding:22px 20px;
    background:var(--paper);
  }
  .news-item + .news-item{border-top:1px dashed var(--khaki-line);}
  .news-date{font-family:"Oswald",sans-serif; color:var(--ink-soft); font-size:0.85rem; padding-top:2px;}
  .news-tag{
    align-self:start; font-size:0.72rem; font-weight:700; padding:4px 10px;
    border:1px solid currentColor; text-align:center; width:fit-content;
  }
  .news-tag.info{color:var(--olive-deep);}
  .news-tag.important{color:var(--ember-deep); border-color:var(--ember-deep);}
  .news-title{font-weight:700; margin-bottom:5px;}
  .news-body{font-size:0.88rem; color:var(--ink-soft);}

  /* ---------- gear checklist ---------- */
  .gear-grid{display:grid; grid-template-columns:1fr 1fr; gap:40px;}
  .gear-col h4{
    font-size:1.05rem; margin-bottom:18px; display:flex; align-items:center; gap:10px;
  }
  .gear-col h4::before{content:""; width:8px; height:8px; background:var(--ember); display:inline-block;}
  .gear-list li{
    display:flex; justify-content:space-between; gap:12px;
    padding:12px 0; border-bottom:1px dashed var(--khaki-line);
    font-size:0.92rem;
  }
  .gear-list li span.req{
    font-size:0.7rem; font-weight:700; color:var(--ember-deep); border:1px solid var(--ember-deep);
    padding:2px 8px; flex:none; height:fit-content;
  }

  /* ---------- rules ---------- */
  .rules-list{display:grid; gap:0; border-top:1px dashed var(--khaki-line);}
  .rule-item{
    display:grid; grid-template-columns:44px 1fr; gap:18px;
    padding:22px 0; border-bottom:1px dashed var(--khaki-line);
  }
  .rule-num{font-family:"Oswald",sans-serif; font-size:1.4rem; color:var(--khaki-line); font-weight:600;}
  .rule-item h4{font-size:1rem; margin-bottom:6px;}
  .rule-item p{font-size:0.88rem; color:var(--ink-soft); margin:0;}

  /* ---------- access ---------- */
  .access-grid{display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center;}
  .map-box{
    aspect-ratio:4/3; background:var(--forest); position:relative; overflow:hidden;
    border:1px solid var(--khaki-line);
  }
  .map-box svg, .map-box iframe{position:absolute; inset:0; width:100%; height:100%; display:block;}
  .access-detail dt{font-size:0.78rem; color:var(--olive-deep); font-weight:700; margin-top:18px;}
  .access-detail dt:first-child{margin-top:0;}
  .access-detail dd{margin:6px 0 0; font-size:0.92rem; color:var(--ink);}

  /* ---------- faq ---------- */
  .faq-item{border-bottom:1px dashed var(--khaki-line);}
  .faq-q{
    width:100%; text-align:left; background:none; border:none; cursor:pointer;
    padding:22px 4px; display:flex; justify-content:space-between; gap:20px;
    font-family:"Zen Kaku Gothic New",sans-serif; font-weight:700; font-size:1rem; color:var(--forest);
  }
  .faq-q .q-mark{font-family:"Oswald",sans-serif; color:var(--ember); flex:none;}
  .faq-plus{font-size:1.3rem; color:var(--ember); flex:none; transition:transform .25s;}
  .faq-item.open .faq-plus{transform:rotate(45deg);}
  .faq-a{max-height:0; overflow:hidden; transition:max-height .3s ease;}
  .faq-a p{padding:0 4px 22px; font-size:0.92rem; color:var(--ink-soft); max-width:60ch;}

  /* ---------- final cta ---------- */
  .final-cta{
    background:var(--forest); color:var(--paper); text-align:center; padding:100px 28px;
    position:relative; overflow:hidden;
  }
  .final-cta::before{
    content:""; position:absolute; inset:0;
    background-image: repeating-radial-gradient(circle at 50% 120%, transparent 0, transparent 60px, rgba(193,72,30,0.18) 61px, rgba(193,72,30,0.18) 62px, transparent 63px);
  }
  .final-cta h2{
    position:relative; color:var(--paper); font-size:clamp(1.6rem,4vw,2.4rem); font-weight:900;
    max-width:20ch; margin:0 auto 18px;
  }
  .final-cta p{position:relative; color:rgba(246,241,228,0.75); margin-bottom:36px;}

  footer{background:var(--forest-deep); color:rgba(246,241,228,0.65); padding:50px 28px 28px; font-size:0.85rem;}
  .footer-row{display:flex; justify-content:space-between; flex-wrap:wrap; gap:20px; max-width:1080px; margin:0 auto 30px;}
  .footer-logo{font-family:"Zen Kaku Gothic New",sans-serif; font-weight:900; color:var(--paper); font-size:1.1rem;}
  .footer-links{display:flex; gap:22px; flex-wrap:wrap;}
  .footer-links a:hover{color:var(--ember);}
  .footer-bottom{max-width:1080px; margin:0 auto; border-top:1px solid rgba(246,241,228,0.15); padding-top:20px; font-size:0.78rem;}

  @media (max-width:820px){
    nav.links{display:none;}
    .menu-toggle{display:block;}
    .concept-grid{grid-template-columns:1fr;}
    .concept-card + .concept-card{border-left:none; border-top:1px dashed var(--khaki-line);}
    .gear-grid{grid-template-columns:1fr;}
    .access-grid{grid-template-columns:1fr;}
    .news-item{grid-template-columns:1fr; gap:8px;}
  }