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

:root{
  --sky:#3bb1ff;
  --coral:#ff5252;
  --ink:#000;
  --wash:#e8f5ff;
  --line:3px solid #000;
  --hard:6px 6px 0 #000;
  --hard-s:3px 3px 0 #000;
  --display:'Montserrat','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --serif:'Cormorant','Songti SC',Georgia,serif;
  --body:system-ui,-apple-system,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:#fff;
  color:#000;
  font:17px/1.72 var(--body);
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block}
a{color:inherit}
p{margin:0 0 16px}
::selection{background:var(--coral);color:#fff}

:focus-visible{
  outline:3px solid var(--coral);
  outline-offset:2px;
}

/* ---------- 顶部 ---------- */
.masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  background:#fff;
  border-bottom:4px solid #000;
  position:relative;
  z-index:40;
}

.mark{justify-self:start;display:flex}
.logo{
  width:46px;height:46px;
  border:var(--line);
  border-radius:4px;
  background:var(--sky);
  object-fit:cover;
  box-shadow:var(--hard-s);
}
.blip{
  width:46px;height:46px;
  border:var(--line);
  border-radius:4px;
  background:
    linear-gradient(#000,#000) center/100% 3px no-repeat,
    var(--coral);
  box-shadow:var(--hard-s);
}

.brand{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:4px 16px;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(19px,5vw,25px);
  letter-spacing:.05em;
  text-decoration:none;
  background:var(--sky);
  border:var(--line);
  border-radius:4px;
  box-shadow:var(--hard-s);
  transform:rotate(-1.4deg);
  text-align:center;
  white-space:nowrap;
}

.cta{
  justify-self:end;
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:6px 16px;
  font-family:var(--display);
  font-weight:700;
  font-size:16px;
  text-decoration:none;
  background:var(--coral);
  color:#fff;
  border:var(--line);
  border-radius:4px;
  box-shadow:var(--hard-s);
  transition:transform .12s ease, box-shadow .12s ease;
}
.cta:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 #000}
.cta:active{transform:translate(2px,2px);box-shadow:1px 1px 0 #000}

/* ---------- 粘性锚点条 ---------- */
.anchorbar{
  position:sticky;
  top:0;
  z-index:35;
  background:#000;
  border-bottom:4px solid var(--sky);
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:thin;
}
.anchorbar ol{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:6px;
  margin:0;
  padding:9px 14px;
  list-style:none;
  min-width:100%;
}
.anchorbar li{flex:0 0 auto}
.anchorbar a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 12px;
  font-family:var(--display);
  font-weight:600;
  font-size:16px;
  color:#fff;
  text-decoration:none;
  border:2px solid #fff;
  border-radius:4px;
  white-space:nowrap;
  transition:background .12s ease, color .12s ease;
}
.anchorbar a::before{
  content:"";
  width:9px;height:9px;
  margin-right:8px;
  background:var(--coral);
  border:2px solid #000;
  flex:0 0 auto;
}
.anchorbar a:hover{
  background:var(--sky);
  color:#000;
  border-color:#000;
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  overflow:hidden;
  min-height:100svh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:clamp(26px,6vw,60px) clamp(18px,5vw,52px) clamp(34px,7vw,64px);
  background:var(--sky);
  border-bottom:5px solid #000;
}

.ghost{
  position:absolute;
  right:-3%;
  bottom:2%;
  z-index:0;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(88px,26vw,300px);
  line-height:.8;
  letter-spacing:-.05em;
  color:#fff;
  opacity:.5;
  pointer-events:none;
  user-select:none;
  white-space:nowrap;
}

.hero-in{
  position:relative;
  z-index:1;
  width:100%;
  max-width:1160px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:clamp(20px,4vw,34px);
}

.hero h1{
  margin:0;
  align-self:flex-end;
  max-width:22ch;
  text-align:right;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(29px,7vw,62px);
  line-height:1.1;
  letter-spacing:-.02em;
  text-shadow:4px 4px 0 #fff, 8px 8px 0 rgba(0,0,0,.18);
}

.collage{
  align-self:flex-start;
  display:flex;
  align-items:flex-end;
  gap:clamp(10px,3vw,26px);
}
.shot{
  width:clamp(116px,30vw,238px);
  height:clamp(146px,36vw,296px);
  object-fit:cover;
  background:#fff;
  border:4px solid #000;
  border-radius:4px;
  box-shadow:8px 8px 0 #000;
}
.shot-a{transform:rotate(-4deg)}
.shot-b{transform:rotate(5deg);margin-bottom:clamp(16px,5vw,44px)}

/* ---------- 主体 ---------- */
.shell{
  display:grid;
  grid-template-columns:252px minmax(0,1fr);
  gap:clamp(22px,4vw,44px);
  align-items:start;
  max-width:1160px;
  margin:0 auto;
  padding:clamp(28px,5vw,54px) clamp(18px,5vw,38px) 64px;
}

/* ---------- 左栏 ---------- */
.rail{
  position:sticky;
  top:78px;
  padding:16px;
  background:var(--wash);
  border:var(--line);
  border-radius:4px;
  box-shadow:5px 5px 0 var(--coral);
}
.rail h2{
  margin:0 0 8px;
  font-family:var(--display);
  font-weight:700;
  font-size:20px;
  letter-spacing:.04em;
}
.rail .subtitle{
  margin:0 0 16px;
  padding-top:10px;
  border-top:2px dashed #000;
  font-size:16px;
  line-height:1.6;
}
.rail-nav ol{
  display:grid;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.rail-nav a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:6px 10px;
  font-weight:600;
  font-size:16px;
  text-decoration:none;
  background:#fff;
  border:2px solid #000;
  border-radius:4px;
  box-shadow:2px 2px 0 #000;
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.rail-nav a:hover{
  background:var(--coral);
  color:#fff;
  transform:translate(-2px,-2px);
  box-shadow:4px 4px 0 #000;
}

/* ---------- 正文 ---------- */
.prose{min-width:0;max-width:74ch}

.content{counter-reset:sec}
.content > section{
  counter-increment:sec;
  padding-top:34px;
  margin-top:34px;
  border-top:3px solid #000;
  scroll-margin-top:86px;
}
.content > section:first-child{
  padding-top:0;
  margin-top:0;
  border-top:0;
}
.content > section::before{
  content:counter(sec,decimal-leading-zero);
  display:block;
  width:max-content;
  margin-bottom:12px;
  padding:2px 9px;
  font-family:var(--display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.16em;
  color:#fff;
  background:#000;
  border-radius:4px;
}

.content h2{
  margin:0 0 14px;
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(23px,4.4vw,33px);
  line-height:1.22;
  letter-spacing:-.01em;
}
.content h3{
  margin:26px 0 10px;
  font-family:var(--display);
  font-weight:700;
  font-size:20px;
  line-height:1.35;
  padding-left:12px;
  border-left:7px solid var(--coral);
}
.content h2 + p,
.content p.subtitle,
.content p.lead,
.content p.desc{
  font-size:18px;
  line-height:1.7;
  padding-left:14px;
  border-left:7px solid var(--sky);
  margin-bottom:18px;
}

.content a{
  font-weight:600;
  text-decoration:underline;
  text-decoration-thickness:3px;
  text-decoration-color:var(--coral);
  text-underline-offset:3px;
}
.content a:hover{background:var(--sky)}

.content ul,
.content ol{margin:0 0 18px;padding-left:22px}
.content li{margin-bottom:8px}
.content ul li::marker{color:var(--coral)}
.content ol li::marker{font-weight:700}

.content strong{box-shadow:inset 0 -10px 0 rgba(59,177,255,.55)}

.content blockquote{
  margin:0 0 20px;
  padding:14px 18px;
  background:var(--wash);
  border:var(--line);
  border-left-width:8px;
  border-left-color:var(--coral);
  border-radius:4px;
}
.content blockquote p:last-child{margin-bottom:0}

.content img{
  margin:8px 0 20px;
  border:var(--line);
  border-radius:4px;
  box-shadow:var(--hard-s);
}

.content hr{
  border:0;
  border-top:3px dashed #000;
  margin:26px 0;
}

.content table{
  width:100%;
  margin:0 0 20px;
  border-collapse:collapse;
  font-size:16px;
}
.content th,
.content td{
  border:2px solid #000;
  padding:8px 10px;
  text-align:left;
}
.content th{background:var(--sky)}

.content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:15px;
  padding:1px 5px;
  background:var(--wash);
  border:2px solid #000;
  border-radius:4px;
}
.content pre{
  overflow-x:auto;
  padding:14px;
  background:var(--wash);
  border:var(--line);
  border-radius:4px;
  margin-bottom:20px;
}
.content pre code{border:0;padding:0;background:none}

/* ---------- 页脚 ---------- */
.foot{
  background:#000;
  color:#fff;
  text-align:center;
  padding:26px 18px 30px;
  border-top:5px solid var(--sky);
}
.foot p{
  margin:0 0 6px;
  font-weight:600;
  font-size:16px;
}
.foot a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 6px;
  color:#fff;
  text-decoration:none;
  border-bottom:3px solid var(--coral);
}
.foot a:hover{background:var(--coral)}
.foot small{
  display:block;
  font-size:16px;
  color:#9fd8ff;
  letter-spacing:.04em;
}

/* ---------- 窄屏 ---------- */
@media (max-width:860px){
  .shell{
    grid-template-columns:minmax(0,1fr);
    padding-top:26px;
  }
  .rail{position:static;box-shadow:4px 4px 0 var(--coral)}
  .rail-nav ol{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rail .subtitle{margin-bottom:14px}
  .anchorbar ol{
    justify-content:flex-start;
    width:max-content;
    min-width:0;
    gap:8px;
  }
  .hero h1{align-self:flex-start;text-align:left;max-width:100%}
  .ghost{opacity:.4}
}

@media (max-width:420px){
  .masthead{padding:8px 12px;gap:8px}
  .cta{padding:6px 12px;font-size:15px}
  .rail-nav ol{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    transition:none!important;
    animation:none!important;
  }
  .shot,.brand{transform:none}
}

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