/* ===== SnowNavi v2 — B-Immersive (沉浸式深色) ===== */
:root{
  --paper:#0B0B0C; --surface:#141416; --ink:#F7F7F5; --soft:#9C9CA1;
  --line:#27272B; --red:#FF1E3C; --header:rgba(11,11,12,.78);
  --ease:cubic-bezier(.2,.7,.2,1);
  /* 统一图片滤镜：默认灰度+压暗，hover 还原彩色 */
  --photo-filter:grayscale(1) brightness(.62) contrast(1.02);
  --photo-filter-on:grayscale(0) brightness(1) contrast(1);
  --maxw:1280px; --narrow:1100px;
  --pad:clamp(18px,4vw,40px);
  --sec:clamp(48px,6vw,96px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{
  font-family:'Hanken Grotesk','Noto Sans SC',sans-serif;
  background:var(--paper); color:var(--ink); overflow-x:hidden; min-height:100vh;
}
::selection{background:var(--red);color:#fff}
a{color:inherit}
img{max-width:100%}
.archivo{font-family:'Archivo','Noto Sans SC',sans-serif}
.mono{font-family:'Space Mono',monospace}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.wrap-narrow{max-width:var(--narrow);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding-top:var(--sec);padding-bottom:var(--sec)}

.kicker{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
h2.title{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:900;font-size:clamp(30px,4.4vw,58px);line-height:1;letter-spacing:-.03em;text-wrap:balance}
.lead{font-size:15px;color:var(--soft);line-height:1.55;text-wrap:pretty}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;border:none;text-decoration:none;border-radius:999px;font-family:'Archivo',sans-serif;font-weight:700;transition:transform .25s var(--ease),background .25s,border-color .25s}
.btn-red{background:var(--red);color:#fff;font-size:15px;padding:15px 32px}
.btn-red:hover{transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:15px;padding:14px 26px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.btn-ghost:hover{border-color:var(--red)}
.btn-dark{background:var(--ink);color:var(--paper);font-size:15px;padding:14px 28px}

/* scroll progress */
#progress-track{position:fixed;top:0;left:0;right:0;width:100%;height:3px;z-index:120;background:transparent}
#progress-bar{height:100%;width:0;background:var(--red);will-change:width}

/* header */
header.site{position:sticky;top:0;z-index:100;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:var(--header);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;background:none;border:none;cursor:pointer;color:inherit}
.brand .tri{display:inline-block;width:0;height:0;border-left:9px solid transparent;border-right:9px solid transparent;border-bottom:16px solid var(--red)}
.brand .word{font-family:'Archivo','Noto Sans SC',sans-serif;font-size:21px;font-weight:800;letter-spacing:-.02em}
.brand .word b{color:var(--red);font-weight:800}
nav.links{display:flex;align-items:center;gap:clamp(14px,2.4vw,30px)}
.snav-link{position:relative;cursor:pointer;font-size:14px;font-weight:600;letter-spacing:.01em;color:var(--ink);text-decoration:none;background:none;border:none;font-family:inherit}
.snav-link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:100%;background:var(--red);transform:scaleX(0);transform-origin:right;transition:transform .35s var(--ease)}
.snav-link:hover::after{transform:scaleX(1);transform-origin:left}
.header-right{display:flex;align-items:center;gap:12px}
.lang-toggle{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-family:'Space Mono',monospace}
.lang-toggle button{border:none;cursor:pointer;font-size:11px;font-weight:700;padding:6px 11px;background:transparent;color:var(--soft);font-family:inherit}
.lang-toggle button.active{background:var(--ink);color:var(--paper)}

/* hero (immersive) */
.hero{position:relative;min-height:88vh;display:flex;align-items:flex-end;overflow:hidden;background:#0b0b0c url('../picture/riding_week.jpg') center/cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,8,9,.55) 0%,rgba(8,8,9,.2) 38%,rgba(8,8,9,.92) 100%)}
.hero-slashes{position:absolute;top:0;right:-60px;height:100%;width:50%;pointer-events:none;opacity:.9}
.hero-slashes i{position:absolute;display:block}
.hero-slashes .s1{top:18%;right:6%;width:380px;height:10px;background:var(--red);transform:rotate(-32deg);opacity:.85}
.hero-slashes .s2{top:30%;right:0;width:300px;height:6px;background:var(--red);transform:rotate(-32deg);opacity:.55}
.hero-slashes .s3{top:44%;right:14%;width:220px;height:4px;background:#fff;transform:rotate(-32deg);opacity:.35}
.hero-inner{position:relative;z-index:2;width:100%;padding-bottom:clamp(48px,6vw,84px)}
.hero-content{max-width:20ch}
.hero h1{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:900;font-size:clamp(44px,7.5vw,104px);line-height:.94;letter-spacing:-.03em;color:#fff;text-wrap:balance}
.hero p{font-size:clamp(16px,1.5vw,19px);line-height:1.6;color:rgba(255,255,255,.72);max-width:46ch;margin:28px 0 32px}
/* 中文标题更紧凑：CJK 无词边界，需放宽容器并收小字号，避免逐字换行 */
html[lang="zh-CN"] .hero-content{max-width:min(94vw,780px)}
html[lang="zh-CN"] .hero h1{font-size:clamp(40px,6.4vw,82px);line-height:1.12;letter-spacing:.01em}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap}

/* marquee */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink);overflow:hidden;padding:16px 0}
.marquee-track{display:flex;width:max-content;animation:snav-marquee 26s linear infinite}
.marquee-group{display:flex;align-items:center;gap:34px;padding-right:34px}
.marquee-word{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:17px;color:#0B0B0C;letter-spacing:.01em;text-transform:uppercase;display:inline-flex;align-items:center;gap:34px}
.marquee-word .dot{color:var(--red);font-size:12px}
@keyframes snav-marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{border-left:2px solid var(--red);padding-left:16px}
.stat .n{font-family:'Archivo',sans-serif;font-weight:900;font-size:clamp(28px,3.2vw,46px);line-height:1;letter-spacing:-.02em}
.stat .l{font-size:13px;color:var(--soft);margin-top:8px;font-weight:500}

/* section head */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:44px}

/* course cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.course-card{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;cursor:pointer;color:inherit;text-decoration:none;display:flex;flex-direction:column;transition:transform .4s var(--ease),border-color .3s,box-shadow .4s}
.course-card:hover{transform:translateY(-6px);border-color:var(--red);box-shadow:0 24px 50px rgba(0,0,0,.4)}
.course-card .thumb{position:relative;aspect-ratio:16/11;overflow:hidden;background:#1a1a1a}
.course-card .thumb img{width:100%;height:100%;object-fit:cover;display:block;filter:var(--photo-filter);transition:filter .55s ease,transform .65s var(--ease)}
.course-card:hover .thumb img{filter:var(--photo-filter-on);transform:scale(1.045)}
.tag{position:absolute;top:12px;left:12px;background:var(--red);color:#fff;font-family:'Space Mono',monospace;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:5px 10px;border-radius:999px}
.course-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.course-card h3{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:21px;letter-spacing:-.01em;line-height:1.05}
.course-card .blurb{font-size:13.5px;color:var(--soft);line-height:1.5;flex:1}
.course-card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:6px;padding-top:14px;border-top:1px solid var(--line)}
.course-card .price{font-family:'Space Mono',monospace;font-size:12px;color:var(--ink);font-weight:700}
.course-card .more{font-size:13px;font-weight:700;color:var(--red);display:flex;align-items:center;gap:6px}

/* ski map */
.map-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(28px,5vw,64px);align-items:center}
.map-headline{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:700;font-size:clamp(18px,2vw,24px);color:var(--red);margin-bottom:20px}
.resorts{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.resort{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:8px 14px}
.resort .name{font-weight:700;font-size:13px}
.resort .country{font-size:12px;color:var(--soft)}
.map-figure{position:relative}
.map-figure .corner{position:absolute;width:90px;height:90px}
.map-figure .tl{inset:-10px auto auto -10px;border-top:3px solid var(--red);border-left:3px solid var(--red)}
.map-figure .br{inset:auto -10px -10px auto;border-bottom:3px solid var(--red);border-right:3px solid var(--red)}
.map-figure img{width:100%;display:block;border-radius:6px;border:1px solid var(--line)}

.surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* story timeline */
.timeline{position:relative}
.timeline .spine{position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--line)}
.tl-item{position:relative;padding-left:40px;padding-bottom:38px}
.tl-item .node{position:absolute;left:-7px;top:4px;width:16px;height:16px;border-radius:50%;background:var(--red);border:3px solid var(--paper)}
.tl-item .year{font-family:'Space Mono',monospace;font-weight:700;font-size:13px;letter-spacing:.1em;color:var(--red);margin-bottom:8px}
.tl-item h3{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:clamp(19px,2.2vw,26px);letter-spacing:-.01em;margin-bottom:6px}
.tl-item .place{font-size:12.5px;color:var(--red);font-weight:600;margin-bottom:8px}
.tl-item p{font-size:14.5px;line-height:1.6;color:var(--soft);max-width:60ch}

/* team */
.team-group{margin-bottom:clamp(36px,4vw,56px)}
.team-group .gh{display:flex;align-items:center;gap:16px;margin-bottom:24px}
.team-group .gh .label{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:clamp(16px,1.8vw,20px);letter-spacing:-.01em}
.team-group .gh .rule{flex:1;height:1px;background:var(--line)}
.team-group .gh .count{font-family:'Space Mono',monospace;font-size:12px;font-weight:700;color:var(--soft)}
.team-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(244px,1fr));gap:18px}
.tcard{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;transition:transform .45s var(--ease),border-color .35s,box-shadow .45s}
.tcard:hover{transform:translateY(-6px);border-color:var(--red);box-shadow:0 22px 48px rgba(0,0,0,.45)}
.tcard .photo{position:relative;aspect-ratio:4/5;overflow:hidden;background:#1a1a1a}
.tcard .photo img{width:100%;height:100%;object-fit:cover;display:block;filter:var(--photo-filter);transition:filter .55s ease,transform .65s var(--ease)}
.tcard:hover .photo img{filter:var(--photo-filter-on);transform:scale(1.045)}
.tcard .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.tcard h3{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:20px;letter-spacing:-.01em;line-height:1.1}
.tcard .bio{font-size:13.5px;color:var(--soft);line-height:1.55;flex:1}
.socials{display:flex;flex-wrap:wrap;gap:7px;margin-top:6px;padding-top:14px;border-top:1px solid var(--line)}
.social{text-decoration:none;color:var(--soft);border:1px solid var(--line);border-radius:999px;padding:5px 11px;font-family:'Space Mono',monospace;font-size:10.5px;font-weight:700;letter-spacing:.04em;transition:border-color .25s,color .25s}
.social:hover{border-color:var(--red);color:var(--red)}

/* partners */
.partner-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.partner{border:1px solid var(--line);border-radius:8px;padding:26px;display:flex;flex-direction:column;gap:16px}
.partner .logo{background:#fff;border-radius:6px;height:72px;display:flex;align-items:center;padding:0 18px;width:fit-content}
.partner .logo img{max-height:44px;max-width:180px;display:block}
.partner h3{font-family:'Archivo',sans-serif;font-weight:800;font-size:20px}
.partner p{font-size:14px;line-height:1.6;color:var(--soft);flex:1}
.partner a.visit{font-size:13px;font-weight:700;color:var(--red);text-decoration:none}

/* contact */
.contact{text-align:center}
.contact h2{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:900;font-size:clamp(36px,6vw,84px);line-height:.98;letter-spacing:-.03em;text-wrap:balance}
.contact p{max-width:52ch;margin:22px auto 34px;font-size:16.5px;line-height:1.6;color:var(--soft)}
.contact .pills{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.contact .pill{border:1px solid var(--line);border-radius:999px;padding:9px 18px;font-size:13px;font-weight:600;color:var(--soft)}

/* footer */
footer.site{background:var(--ink);color:var(--paper)}
footer.site .row{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-top:48px;padding-bottom:48px}
footer.site .tagline{font-size:13.5px;opacity:.7;max-width:40ch;text-align:center}
footer.site .rights{font-family:'Space Mono',monospace;font-size:11px;opacity:.55}

/* reveal animation */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].in{opacity:1;transform:none}
.no-js [data-reveal]{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  .marquee-track{animation:none}
  html{scroll-behavior:auto}
}

/* ===== course detail (course.html) ===== */
.detail-hero{position:relative;min-height:56vh;display:flex;align-items:flex-end;overflow:hidden;background:#0b0b0c center/cover}
.detail-hero .hero-overlay{background:linear-gradient(180deg,rgba(8,8,9,.5) 0%,rgba(8,8,9,.35) 40%,rgba(8,8,9,.94) 100%)}
.detail-hero .inner{position:relative;z-index:2;width:100%;padding-bottom:clamp(36px,5vw,64px)}
.detail-hero h1{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:900;font-size:clamp(34px,6vw,82px);line-height:.96;letter-spacing:-.03em;color:#fff;text-wrap:balance;max-width:20ch}
html[lang="zh-CN"] .detail-hero h1{font-size:clamp(30px,4.6vw,58px);line-height:1.14;letter-spacing:.01em;max-width:min(92vw,720px)}
.detail-hero .desc{font-size:clamp(15px,1.5vw,18px);line-height:1.6;color:rgba(255,255,255,.75);max-width:60ch;margin-top:20px}
.back-link{background:none;border:none;cursor:pointer;color:var(--soft);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:7px;font-family:inherit;text-decoration:none}
.back-link:hover{color:var(--red)}
.sub-list{display:flex;flex-direction:column;gap:18px}
.sub-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:grid;grid-template-columns:300px 1fr}
.sub-card .img{position:relative;background:#1a1a1a;min-height:200px}
.sub-card .img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.sub-card .body{padding:24px 26px;display:flex;flex-direction:column;gap:12px}
.sub-card h3{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:clamp(20px,2.4vw,28px);letter-spacing:-.01em}
.sub-meta{display:flex;flex-wrap:wrap;gap:18px}
.sub-meta .item{display:flex;flex-direction:column;gap:4px}
.sub-meta .k{font-family:'Space Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--soft)}
.sub-meta .v{font-family:'Archivo',sans-serif;font-weight:700;font-size:15px}
.sub-card .sub-desc{font-size:14.5px;line-height:1.7;color:var(--soft);white-space:pre-wrap;text-wrap:pretty}
.sub-card .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.pdf-link{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;padding:11px 20px;font-size:13px;font-weight:700;color:var(--ink);text-decoration:none}
.pdf-link:hover{border-color:var(--red);color:var(--red)}

/* ===== registration modal ===== */
.reg-mask{position:fixed;inset:0;z-index:200;background:rgba(8,8,9,.6);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px}
.reg-mask[hidden]{display:none}
.reg-dialog{background:var(--surface);color:var(--ink);width:100%;max-width:540px;border-radius:14px;overflow:hidden;box-shadow:0 40px 120px rgba(0,0,0,.6);border:1px solid var(--line)}
.reg-head{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--line)}
.reg-head .k{font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.reg-head .name{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:18px;margin-top:2px}
.reg-close{background:none;border:none;cursor:pointer;font-size:22px;color:var(--soft);line-height:1}
.reg-steps{display:flex;gap:6px;padding:18px 24px 4px}
.reg-steps .st{flex:1;display:flex;flex-direction:column;gap:7px}
.reg-steps .bar{height:4px;border-radius:2px;background:var(--line)}
.reg-steps .st.done .bar,.reg-steps .st.active .bar{background:var(--red)}
.reg-steps .lbl{font-size:10.5px;font-weight:700;letter-spacing:.04em;color:var(--soft);font-family:'Space Mono',monospace}
.reg-steps .st.active .lbl{color:var(--red)}
.reg-body{padding:22px 24px 26px}
.reg-body .q{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:18px;margin-bottom:16px}
.lvl-opts{display:flex;flex-direction:column;gap:10px}
.lvl-opt{text-align:left;cursor:pointer;border:1.5px solid var(--line);background:var(--surface);color:inherit;border-radius:10px;padding:14px 16px;font-size:15px;font-weight:600;display:flex;align-items:center;justify-content:space-between;font-family:inherit}
.lvl-opt.sel{border-color:var(--red);background:rgba(255,30,60,.12)}
.lvl-opt .chk{color:var(--red);font-weight:800}
.reg-field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.reg-field span{font-size:12px;font-weight:700;color:var(--soft);font-family:'Space Mono',monospace;letter-spacing:.04em}
.reg-field input{border:1.5px solid var(--line);background:var(--paper);color:inherit;border-radius:10px;padding:13px 14px;font-size:15px;font-family:inherit;outline:none}
.reg-field input:focus{border-color:var(--red)}
.reg-review{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.reg-review .r{display:flex;justify-content:space-between;padding:13px 16px;border-bottom:1px solid var(--line)}
.reg-review .r:last-child{border-bottom:none}
.reg-review .r .lk{color:var(--soft);font-size:14px}
.reg-review .r .rv{font-weight:700;font-size:14px}
.reg-done{text-align:center;padding:14px 0}
.reg-done .check{width:60px;height:60px;border-radius:50%;background:var(--red);color:#fff;display:flex;align-items:center;justify-content:center;font-size:30px;margin:0 auto 18px}
.reg-done .t{font-family:'Archivo','Noto Sans SC',sans-serif;font-weight:800;font-size:22px;margin-bottom:10px}
.reg-done p{font-size:14.5px;line-height:1.6;color:var(--soft);max-width:36ch;margin:0 auto}
.reg-foot{display:flex;gap:10px;padding:0 24px 24px}
.reg-foot .btn-back{flex:0 0 auto;background:none;border:1.5px solid var(--line);color:inherit;cursor:pointer;font-weight:700;font-size:14px;padding:13px 22px;border-radius:999px;font-family:'Archivo',sans-serif}
.reg-foot .btn-next{flex:1;background:var(--red);color:#fff;border:none;cursor:pointer;font-family:'Archivo',sans-serif;font-weight:700;font-size:15px;padding:14px 22px;border-radius:999px}
.reg-foot .btn-next:disabled{opacity:.45;cursor:not-allowed}

/* responsive */
@media (max-width:900px){
  .map-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .partner-grid{grid-template-columns:1fr}
  .sub-card{grid-template-columns:1fr}
  .sub-card .img{min-height:200px;aspect-ratio:16/9}
}
@media (max-width:768px){
  nav.links{display:none}
  .hero-content{max-width:none}
  .sec-head{flex-direction:column;align-items:flex-start}
}