@import url('https://fonts.googleapis.com/css2?family=Newsreader:wght@400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

:root{
  --neon:#87ff71;
  --sun:#ffce5c;
  --ink:#192617;
  --cream:#f4f9ee;
  --rail:270px;
  --shadow:0 18px 36px rgba(0,0,0,.4);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  overflow-x:hidden;
  background-color:var(--ink);
  background-image:radial-gradient(rgba(135,255,113,.15) 1.5px,transparent 1.6px);
  background-size:26px 26px;
  color:var(--cream);
  font-family:Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.66;
  -webkit-text-size-adjust:100%;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3,h4{font-family:Newsreader,Georgia,"Songti SC",serif;font-weight:700;line-height:1.2}
:focus-visible{outline:3px solid var(--sun);outline-offset:3px}

.skip{
  position:absolute;left:-9999px;top:0;z-index:90;
  background:var(--sun);color:var(--ink);
  padding:12px 18px;text-decoration:none;font-weight:700;
}
.skip:focus{left:10px;top:10px}

.wrap{
  max-width:1380px;
  margin:0 auto;
  padding:0 clamp(14px,3vw,44px) 16px;
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  grid-template-areas:"rail hero" "rail stage";
  column-gap:clamp(18px,3vw,46px);
  align-items:start;
}

/* ---------- 左侧竖排导航 ---------- */
.rail{
  grid-area:rail;
  position:sticky;
  top:0;
  align-self:start;
  max-height:100vh;
  overflow:auto;
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:24px 18px 28px 0;
  border-right:3px dashed rgba(135,255,113,.45);
}

.brand{
  display:flex;align-items:center;gap:10px;
  min-height:44px;text-decoration:none;
}
.mark{
  width:26px;height:26px;flex:none;
  background:var(--neon);
  clip-path:polygon(50% 0,100% 100%,0 100%);
  transform:rotate(-14deg);
}
.brand-name{
  font-family:Newsreader,Georgia,serif;
  font-size:19px;font-weight:700;letter-spacing:.02em;
  color:var(--neon);
}

.menu ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.menu a{
  display:flex;align-items:center;
  min-height:44px;
  padding:10px 16px;
  border:2px solid rgba(135,255,113,.5);
  border-radius:999px;
  text-decoration:none;
  font-size:15px;
  letter-spacing:.04em;
  color:var(--cream);
  transition:background .18s ease,color .18s ease,transform .18s ease;
}
.menu a:hover,.menu a:focus-visible{
  background:var(--neon);
  color:var(--ink);
  transform:translateX(4px);
}

.cta{
  margin-top:auto;
  display:flex;align-items:center;justify-content:center;
  min-height:46px;
  padding:10px 16px;
  background:var(--sun);
  color:var(--ink);
  border:2px solid var(--ink);
  text-decoration:none;
  font-weight:700;font-size:15px;letter-spacing:.08em;
  transform:skewX(-9deg);
  box-shadow:6px 6px 0 var(--neon);
}
.cta:hover,.cta:focus-visible{background:var(--neon);box-shadow:6px 6px 0 var(--sun)}

/* ---------- 首屏 ---------- */
.hero{
  grid-area:hero;
  position:relative;
  overflow:hidden;
  margin-top:24px;
  min-height:45vh;
  padding:26px clamp(16px,3vw,34px);
  display:grid;
  grid-template-columns:1fr 1.1fr;
  align-items:center;
  gap:clamp(16px,3vw,32px);
  background:linear-gradient(103deg,var(--neon) 0 49.6%,var(--ink) 50%);
  box-shadow:var(--shadow);
}
.hero::before{
  content:"";
  position:absolute;right:-46px;top:-56px;
  width:180px;height:180px;
  background:var(--sun);opacity:.9;
  clip-path:polygon(50% 0,100% 38%,82% 100%,18% 100%,0 38%);
  transform:rotate(16deg);
}
.hero::after{
  content:"";
  position:absolute;left:0;bottom:0;
  width:100%;height:10px;
  background:repeating-linear-gradient(90deg,var(--sun) 0 14px,transparent 14px 28px);
}
.hero-copy{position:relative;z-index:1;text-align:center}
.hero-copy h1{
  font-size:clamp(30px,4.6vw,56px);
  margin:0 0 12px;
  color:var(--cream);
  letter-spacing:.01em;
}
.hero-desc{margin:0;font-size:16px;line-height:1.6;color:#c6dcbd}

.hero-art{
  position:relative;z-index:1;
  margin:0;
  height:clamp(210px,40vh,330px);
  overflow:hidden;
  background:#213019;
  clip-path:polygon(0 0,100% 0,100% 88%,88% 100%,0 100%);
}
.hero-art .shot{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  opacity:0;
  transition:opacity .9s ease;
}
.hero-art .shot.is-on{opacity:1}

.hero-art.deco{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
  place-items:center;
  padding:16px;
}
.hero-art.deco span{width:100%;aspect-ratio:1;background:var(--sun)}
.hero-art.deco span:nth-child(1){background:var(--neon);clip-path:polygon(50% 0,100% 100%,0 100%)}
.hero-art.deco span:nth-child(2){border-radius:50%}
.hero-art.deco span:nth-child(3){background:var(--cream);clip-path:polygon(0 0,100% 0,50% 100%)}

/* ---------- 正文 ---------- */
.stage{grid-area:stage;padding-bottom:10px}

.sheet{
  background:#eef5e6;
  color:var(--ink);
  border:3px solid var(--ink);
  box-shadow:var(--shadow);
  padding:clamp(20px,3vw,42px);
}

.lede{
  margin:0 0 24px;
  padding-bottom:16px;
  border-bottom:3px dotted rgba(25,38,23,.35);
}
.lede h2{margin:0;font-size:clamp(22px,2.6vw,30px);color:var(--ink)}

.lede small,
.sheet div>small{
  display:block;
  font-family:Roboto,Arial,sans-serif;
  font-weight:700;
  font-size:12px;
  letter-spacing:.26em;
  color:#3d6b34;
  margin:0 0 6px;
}

.sheet div{
  position:relative;
  background:#fff;
  border:2px solid var(--ink);
  box-shadow:0 14px 28px rgba(25,38,23,.16);
  padding:clamp(18px,2.4vw,30px);
  margin:0 0 26px;
  scroll-margin-top:24px;
}
.sheet div::before{
  content:"";
  position:absolute;left:-2px;top:-2px;
  width:70px;height:10px;
  background:var(--sun);
  clip-path:polygon(0 0,100% 0,93% 100%,0 100%);
}
.sheet div:nth-of-type(even)::before{background:var(--neon)}
.sheet div:last-of-type{margin-bottom:0}

.sheet h2{font-size:clamp(23px,3vw,32px);margin:0 0 .5em;color:#152312}
.sheet h3{font-size:19px;margin:1.3em 0 .45em;color:#1d3120}
.sheet p{margin:0 0 1em}
.sheet p:last-child{margin-bottom:0}
.sheet ul,.sheet ol{margin:0 0 1em;padding-left:1.3em}
.sheet li{margin:.35em 0}
.sheet strong{color:#12331a}
.sheet a{
  color:#1d6b2d;
  text-decoration:underline;
  text-decoration-style:dashed;
  text-underline-offset:3px;
}
.sheet a:hover{background:rgba(135,255,113,.45)}
.sheet img{max-width:100%;height:auto;margin:.6em 0;border:2px solid var(--ink)}
.sheet blockquote{
  margin:1em 0;
  padding:.6em 1em;
  border-left:6px solid var(--sun);
  background:#f6fbef;
}

/* ---------- 页脚 ---------- */
footer{
  margin-top:56px;
  padding:46px 20px 42px;
  text-align:center;
  border-top:3px dashed rgba(135,255,113,.45);
}
footer p{margin:0}
.mega{
  display:block;
  font-family:Newsreader,Georgia,serif;
  font-weight:700;
  font-size:clamp(34px,11vw,118px);
  line-height:.92;
  letter-spacing:-.01em;
  color:var(--neon);
  word-break:break-word;
}
.foot-copy{display:block;margin-top:12px;font-size:13px;letter-spacing:.22em;color:#a7c29d}
.foot-note{display:block;margin-top:6px;font-size:12px;letter-spacing:.18em;color:#7e9578}

/* ---------- 进场 ---------- */
.rv{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.rv.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .rv{opacity:1 !important;transform:none !important}
}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .wrap{
    grid-template-columns:minmax(0,1fr);
    grid-template-areas:"rail" "hero" "stage";
    padding:0 14px 12px;
    column-gap:0;
  }
  .rail{
    position:sticky;top:0;z-index:40;
    flex-direction:row;
    align-items:center;
    flex-wrap:nowrap;
    gap:10px;
    max-height:none;
    overflow:visible;
    padding:8px 0;
    border-right:0;
    border-bottom:3px dashed rgba(135,255,113,.45);
    background:var(--ink);
    box-shadow:0 8px 18px rgba(0,0,0,.45);
  }
  .brand{flex:none}
  .brand-name{font-size:16px}
  .menu{flex:1 1 auto;min-width:0;overflow-x:auto;padding-bottom:2px}
  .menu ul{flex-direction:row;gap:8px}
  .menu a{white-space:nowrap;font-size:14px;padding:8px 13px}
  .cta{
    flex:none;margin-top:0;
    min-height:44px;
    padding:8px 13px;
    font-size:14px;
    box-shadow:4px 4px 0 var(--neon);
  }
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    margin-top:16px;
    padding:20px 16px 22px;
    gap:18px;
    background:var(--neon);
  }
  .hero-copy{order:1}
  .hero-copy h1{color:var(--ink);font-size:clamp(26px,7.6vw,38px)}
  .hero-desc{color:#20331c}
  .hero-art{order:2;height:220px}
  .hero::before{right:-58px;top:-64px;opacity:.85}
  .sheet{padding:16px}
  .sheet div{padding:18px 15px;scroll-margin-top:88px}
  .lede{margin-bottom:18px}
}

button[aria-expanded]{min-width:44px;min-height:44px}