/* Shared styles for case-study pages (/move, /nextjune, ...).
   Extracted from the first one so the next page is content, not CSS. */
:root{
  --night:#090d16; --text:#f1f5f9; --muted:#94a3b8; --cyan:#34d6e5;
  --line:rgba(148,163,184,.16); --panel:rgba(148,163,184,.05);
  --font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","PingFang SC","Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; color:var(--text);
  background:
    radial-gradient(circle at 78% 12%, rgba(99,102,241,.10), transparent 32%),
    radial-gradient(circle at 92% 68%, rgba(6,182,212,.06), transparent 26%),
    var(--night);
  font-family:var(--font-sans); font-size:17px; line-height:1.7;
  letter-spacing:-.01em; -webkit-font-smoothing:antialiased;
}
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; opacity:.34; z-index:0;
  background-image:
    radial-gradient(circle at 11% 18%,#fff 0 1px,transparent 1.5px),
    radial-gradient(circle at 24% 74%,#fff 0 1px,transparent 1.5px),
    radial-gradient(circle at 42% 12%,#fff 0 .8px,transparent 1.3px),
    radial-gradient(circle at 63% 82%,#fff 0 1px,transparent 1.5px),
    radial-gradient(circle at 92% 13%,#fff 0 .8px,transparent 1.3px);
}

/* ---- 语言切换：两套完整 DOM，CSS 决定显示哪套 ---- */
body[data-lang="en"] .lang-zh{display:none}
body[data-lang="zh"] .lang-en{display:none}
body[data-lang="zh"]{letter-spacing:0; line-height:1.85}

.topbar{
  position:sticky; top:0; z-index:10;
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; padding:14px clamp(20px,5vw,48px);
  background:rgba(9,13,22,.72); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar a.home{
  color:var(--muted); text-decoration:none; font-size:13px;
  display:inline-flex; align-items:center; gap:8px; transition:color .2s;
}
.topbar a.home:hover{color:var(--text)}
.langtoggle{
  background:none; border:1px solid var(--line); border-radius:100px;
  color:var(--muted); font-family:var(--font-sans); font-size:12px;
  padding:5px 14px; cursor:pointer; transition:all .2s; letter-spacing:.04em;
}
.langtoggle:hover{border-color:rgba(52,214,229,.45); color:var(--cyan)}
.langtoggle:focus-visible{outline:2px solid var(--cyan); outline-offset:2px}

main{position:relative; z-index:1; padding:0 clamp(20px,5vw,48px) 100px}
article{max-width:720px; margin:0 auto}

.eyebrow{
  margin:64px 0 22px; color:var(--muted);
  font:600 10px/1 var(--font-mono); letter-spacing:.2em;
  display:flex; align-items:center; gap:10px;
}
.eyebrow::before{content:""; width:20px; height:1px; background:var(--cyan); opacity:.7}

h1{
  margin:0 0 20px; font-size:clamp(38px,7vw,60px); line-height:1.05;
  letter-spacing:-.035em; font-weight:700;
}
.lede{margin:0 0 34px; font-size:clamp(18px,2.4vw,21px); color:#cbd5e1; line-height:1.6; max-width:38em}

.focus{
  margin:-18px 0 30px; color:#a5f3fc;
  font:600 11px/1.7 var(--font-mono); letter-spacing:.07em;
}

.actions{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:22px}
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 20px; border-radius:100px; font-size:14px; font-weight:600;
  text-decoration:none; transition:all .22s cubic-bezier(.16,1,.3,1);
}
.btn-primary{background:var(--cyan); color:#06202a}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 8px 26px rgba(52,214,229,.28)}
.btn-ghost{border:1px solid var(--line); color:var(--muted)}
.btn-ghost:hover{border-color:rgba(52,214,229,.45); color:var(--cyan)}

.meta{
  margin:0 0 8px; color:var(--muted); font:500 11px/1.9 var(--font-mono);
  letter-spacing:.08em; text-transform:uppercase;
}

hr.rule{border:0; border-top:1px solid var(--line); margin:56px 0}

h2{
  margin:0 0 6px; font-size:12px; font-family:var(--font-mono);
  font-weight:600; letter-spacing:.2em; color:var(--cyan); text-transform:uppercase;
}
.section-intro{margin:0 0 30px; font-size:clamp(21px,3vw,26px); line-height:1.4; letter-spacing:-.02em; font-weight:600}
p{margin:0 0 18px; color:#cbd5e1}
strong{color:var(--text); font-weight:600}
code{
  font-family:var(--font-mono); font-size:.86em;
  background:rgba(148,163,184,.12); padding:2px 6px; border-radius:5px; color:#a5f3fc;
}
em{color:var(--text); font-style:italic}

blockquote{
  margin:0 0 26px; padding:18px 22px; border-left:2px solid var(--cyan);
  background:var(--panel); border-radius:0 10px 10px 0;
  color:#cbd5e1; font-size:.97em;
}
blockquote p:last-child{margin:0}

ul.spec{list-style:none; padding:0; margin:0 0 26px}
ul.spec li{
  position:relative; padding:0 0 0 22px; margin-bottom:11px; color:#cbd5e1; font-size:.97em;
}
ul.spec li::before{
  content:"–"; position:absolute; left:2px; color:var(--cyan); opacity:.75;
}

.decision{
  border:1px solid var(--line); border-radius:14px;
  padding:26px 28px; margin-bottom:16px; background:var(--panel);
}
.decision .tag{
  display:inline-block; margin-bottom:12px; padding:3px 10px; border-radius:100px;
  font:600 10px/1.7 var(--font-mono); letter-spacing:.13em; text-transform:uppercase;
  background:rgba(52,214,229,.11); color:var(--cyan); border:1px solid rgba(52,214,229,.22);
}
.decision h3{margin:0 0 12px; font-size:20px; line-height:1.35; letter-spacing:-.02em; font-weight:650}
.decision p:last-child{margin-bottom:0}

/* 「怎么做出来的」这一节刻意不给边框——
   一旦包成卡片就会读起来像免责声明框。
   脚注级别的篇幅，正文级别的质量。 */
.build-note{margin-bottom:8px}
.build-note h2{margin-bottom:18px}
.build-note p{font-size:.95em; color:#b6c2d1}
.build-note p:last-child{margin-bottom:0}

.close{
  margin-top:40px; padding:26px 28px; border:1px solid var(--line);
  border-radius:14px; background:var(--panel);
}
.close p:last-child{margin-bottom:0}
.close .actions{margin:22px 0 0}

.foot{
  max-width:720px; margin:64px auto 0; padding-top:26px;
  border-top:1px solid var(--line); color:var(--muted); font-size:13px;
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
}
.foot a{color:var(--muted); text-decoration:none; transition:color .2s}
.foot a:hover{color:var(--cyan)}

@media (max-width:640px){
  body{font-size:16px}
  .eyebrow{margin-top:44px}
  .decision{padding:22px 20px}
  .close{padding:22px 20px}
}

/* ---- Figures ---------------------------------------------------------------
   Screenshots of a product nobody can log into do a lot of work, so they get
   room. The caption carries the point; the image is evidence for it. */
figure{margin:0 0 30px}
figure img{
  display:block; width:100%; height:auto; border-radius:12px;
  border:1px solid var(--line); background:var(--panel);
}
figcaption{
  margin-top:10px; font-size:.84em; line-height:1.6; color:var(--muted);
}
figcaption b{color:#cbd5e1; font-weight:600}
.decision figure{margin-top:22px}
.decision figure:last-child{margin-bottom:0}