/* ============================================
   Fujisan Travel Guide — 全站样式
   原创设计 · 现代旅游门户风格
   ============================================ */
:root{
  --fuji-blue:#1e5f9e;
  --fuji-deep:#123f6b;
  --sky-top:#8ec9f0;
  --sky-bottom:#e8f4fd;
  --sun:#ffd66b;
  --accent:#e8654a;
  --ink:#1c2733;
  --muted:#5b6b7c;
  --line:#e3eaf2;
  --bg:#f7fafc;
  --card:#ffffff;
  --radius:14px;
  --shadow:0 6px 24px rgba(18,63,107,.10);
  --shadow-lg:0 16px 48px rgba(18,63,107,.16);
  --max:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN",
    "Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--fuji-blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--fuji-deep)}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 顶部工具条 ---------- */
.topbar{background:var(--fuji-deep);color:#cfe3f5;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:38px;flex-wrap:wrap;gap:8px}
.topbar a{color:#cfe3f5}
.topbar a:hover{color:#fff}
.topbar .lang span{opacity:.55;margin:0 6px}
.topbar .lang b{color:#fff;font-weight:600}

/* ---------- 主导航 ---------- */
.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(18,63,107,.06)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;color:var(--fuji-deep);letter-spacing:.3px}
.brand .logo{width:44px;height:44px;flex:0 0 44px}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:2px;text-transform:uppercase}
.menu{display:flex;list-style:none;gap:6px;flex-wrap:wrap}
.menu a{display:block;padding:10px 16px;border-radius:8px;font-weight:600;font-size:15px;color:var(--ink)}
.menu a:hover,.menu a.active{background:#eaf3fb;color:var(--fuji-blue)}
.nav-cta{background:var(--accent)!important;color:#fff!important;padding:11px 22px!important;border-radius:999px!important;font-weight:700!important;box-shadow:0 4px 14px rgba(232,101,74,.32)}
.nav-cta:hover{filter:brightness(1.05)}
.burger{display:none;font-size:26px;background:none;border:0;color:var(--fuji-deep);cursor:pointer}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(180deg,var(--sky-top) 0%,var(--sky-bottom) 100%);overflow:hidden}
.hero .art{position:absolute;inset:0;width:100%;height:100%}
.hero .wrap{position:relative;z-index:2;padding:96px 24px 132px;max-width:var(--max)}
.hero .tag{display:inline-block;background:rgba(255,255,255,.85);color:var(--fuji-blue);font-weight:700;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;padding:7px 16px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.12;color:var(--fuji-deep);font-weight:800;max-width:15ch;letter-spacing:-.5px}
.hero p.lead{margin-top:20px;font-size:clamp(16px,2vw,20px);color:#2b4a68;max-width:52ch;font-weight:500}
.hero .btns{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:15px 32px;border-radius:999px;font-weight:700;font-size:16px;transition:transform .15s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(232,101,74,.35)}
.btn-ghost{background:rgba(255,255,255,.9);color:var(--fuji-deep);border:2px solid #fff}
.hero-stats{position:relative;z-index:2;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);display:grid;grid-template-columns:repeat(4,1fr);max-width:var(--max);margin:-64px auto 0;padding:8px}
.hero-stats .s{text-align:center;padding:22px 12px}
.hero-stats .s b{display:block;font-size:clamp(24px,3vw,34px);color:var(--fuji-blue);font-weight:800}
.hero-stats .s span{font-size:13px;color:var(--muted);font-weight:600}
.hero-stats .s+.s{border-left:1px solid var(--line)}

/* ---------- 区块通用 ---------- */
section.pad{padding:76px 0}
.sec-head{max-width:640px;margin-bottom:44px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{color:var(--accent);font-weight:800;font-size:13px;letter-spacing:2px;text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.6vw,38px);color:var(--fuji-deep);font-weight:800;margin-top:8px;line-height:1.2}
.sec-head p{margin-top:14px;color:var(--muted);font-size:17px}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:26px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card .thumb{aspect-ratio:16/10;position:relative;overflow:hidden;background:#dceaf7}
.card .thumb svg{width:100%;height:100%}
.card .badge{position:absolute;top:12px;left:12px;background:rgba(18,63,107,.9);color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.card .body{padding:22px;flex:1;display:flex;flex-direction:column}
.card h3{font-size:19px;color:var(--fuji-deep);font-weight:700;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px;flex:1}
.card .meta{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted)}
.card .more{font-weight:700;color:var(--accent)}

/* ---------- 季节条 ---------- */
.seasons{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.season{border-radius:var(--radius);padding:30px 24px;color:#fff;position:relative;overflow:hidden;min-height:210px;display:flex;flex-direction:column;justify-content:flex-end}
.season h4{font-size:22px;font-weight:800;margin-bottom:6px}
.season span{font-size:14px;opacity:.92}
.season .kanji{position:absolute;top:12px;right:18px;font-size:64px;font-weight:800;opacity:.22;line-height:1}
.s-spring{background:linear-gradient(150deg,#f78fb3,#e8658f)}
.s-summer{background:linear-gradient(150deg,#2f9e7f,#1e7f8f)}
.s-autumn{background:linear-gradient(150deg,#e8913a,#d1622a)}
.s-winter{background:linear-gradient(150deg,#5b8fd6,#3f6fb5)}

/* ---------- 特色/图标 ---------- */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow)}
.feature .ic{width:56px;height:56px;border-radius:14px;background:#eaf3fb;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feature h3{font-size:18px;color:var(--fuji-deep);font-weight:700;margin-bottom:8px}
.feature p{color:var(--muted);font-size:15px}

/* ---------- 信息/提示条 ---------- */
.notice{background:linear-gradient(135deg,#fff6e6,#ffefdb);border:1px solid #ffe0b0;border-left:5px solid var(--sun);border-radius:12px;padding:22px 26px;display:flex;gap:16px;align-items:flex-start}
.notice .ic{font-size:26px}
.notice h4{color:#a4610a;font-size:16px;margin-bottom:4px}
.notice p{color:#7a5a2a;font-size:15px}

/* ---------- 数据表 ---------- */
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);font-size:15px}
.table th{background:var(--fuji-blue);color:#fff;text-align:left;padding:15px 18px;font-weight:700;font-size:14px}
.table td{padding:14px 18px;border-top:1px solid var(--line)}
.table tr:nth-child(even) td{background:#f9fbfd}
.table td b{color:var(--fuji-deep)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;position:relative;box-shadow:var(--shadow)}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-18px;left:22px;width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(232,101,74,.4)}
.step h4{margin-top:8px;font-size:17px;color:var(--fuji-deep);font-weight:700;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(135deg,var(--fuji-blue),var(--fuji-deep));border-radius:20px;padding:56px 48px;color:#fff;text-align:center;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;right:-60px;bottom:-80px;width:320px;height:320px;border-radius:50%;background:rgba(255,255,255,.06)}
.cta h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:14px}
.cta p{opacity:.9;font-size:17px;max-width:60ch;margin:0 auto 28px}
.cta .btn-primary{background:#fff;color:var(--fuji-deep);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* ---------- 页脚 ---------- */
footer{background:#0f2f52;color:#b8cde3;margin-top:76px}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:60px 0 40px}
footer h5{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.5px}
footer ul{list-style:none}
footer li{margin-bottom:11px}
footer a{color:#b8cde3;font-size:14px}
footer a:hover{color:#fff}
footer .about{font-size:14px;color:#93aecb;line-height:1.8}
footer .about .brand{color:#fff;font-size:19px;margin-bottom:14px}
footer .about .brand small{color:#7f9cbd}
footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#8ba8c6}
footer .bottom a{color:#8ba8c6}

/* ---------- 内页 banner ---------- */
.page-hero{background:linear-gradient(135deg,var(--fuji-blue),var(--fuji-deep));color:#fff;padding:64px 0 56px;position:relative;overflow:hidden}
.page-hero h1{font-size:clamp(28px,4vw,44px);font-weight:800}
.page-hero .crumb{font-size:14px;opacity:.85;margin-bottom:14px}
.page-hero .crumb a{color:#cfe3f5}
.page-hero p{margin-top:14px;opacity:.9;font-size:17px;max-width:60ch}

/* ---------- 文章正文 ---------- */
.prose{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:44px;box-shadow:var(--shadow);font-size:16.5px;color:#2c3a49}
.prose h2{font-size:26px;color:var(--fuji-deep);margin:34px 0 14px;font-weight:800;padding-bottom:10px;border-bottom:2px solid var(--line)}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:20px;color:var(--fuji-blue);margin:26px 0 10px;font-weight:700}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{margin-bottom:9px}
.prose blockquote{background:#eaf3fb;border-left:4px solid var(--fuji-blue);padding:16px 22px;border-radius:0 10px 10px 0;margin:20px 0;color:#2b4a68}

/* ---------- 表单 ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.field{margin-bottom:20px}
.field label{display:block;font-weight:700;font-size:14px;margin-bottom:7px;color:var(--fuji-deep)}
.field input,.field select,.field textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fbfdff;transition:border .2s}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--fuji-blue);box-shadow:0 0 0 3px rgba(30,95,158,.12)}
.field textarea{min-height:150px;resize:vertical}

/* ---------- FAQ ---------- */
.faq{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:700;font-size:16.5px;color:var(--fuji-deep);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:26px;color:var(--accent);font-weight:400;transition:transform .2s}
.faq[open] summary::after{transform:rotate(45deg)}
.faq .ans{padding:0 24px 22px;color:var(--muted);font-size:15.5px}

/* ---------- 图库 ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gallery .gi{border-radius:12px;overflow:hidden;aspect-ratio:4/3;position:relative;box-shadow:var(--shadow)}
.gallery .gi svg{width:100%;height:100%;transition:transform .4s}
.gallery .gi:hover svg{transform:scale(1.06)}
.gallery .gi figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;color:#fff;font-size:14px;font-weight:600;background:linear-gradient(transparent,rgba(0,0,0,.65))}

/* ---------- reveal 动画 ---------- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .seasons{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .hero-stats .s:nth-child(3){border-left:0}
  footer .cols{grid-template-columns:1fr 1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:680px){
  .menu{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .menu.open{display:flex}
  .burger{display:block}
  .g3,.g4,.g2,.seasons,.steps,.gallery{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .prose,.form,.cta{padding:26px 22px}
  .topbar .wrap{justify-content:center}
}