.skill-detail-page{--detail-panel:rgba(2,20,31,.9);--detail-panel-soft:rgba(4,40,52,.58)}
.skill-detail-page main{overflow:hidden}
.skill-detail-hero{display:grid;grid-template-columns:minmax(0,.9fr) minmax(440px,1.1fr);align-items:center;gap:clamp(48px,7vw,110px);min-height:86dvh;padding-top:112px}
.detail-back{display:inline-block;margin-bottom:38px;border-bottom:1px solid var(--line);padding:7px 0;color:var(--faint);font-family:var(--mono);font-size:8px;letter-spacing:.11em}
.detail-back:hover{color:var(--ink)}
.detail-hero-copy h1{max-width:8.5ch;margin-bottom:25px;font-size:clamp(65px,7vw,100px);line-height:.87}
.detail-deck{max-width:34em;margin-bottom:32px;color:var(--muted);font-size:17px;line-height:1.7}
.detail-actions,.source-close-links{display:flex;flex-wrap:wrap;gap:28px}
.detail-actions a,.starter-heading a,.package-copy a,.install-heading a,.source-close-links a{display:inline-block;border-bottom:1px solid var(--accent);padding:8px 0;font-family:var(--mono);font-size:8px;letter-spacing:.11em}
.contract-source{border:1px solid var(--line-strong);background:linear-gradient(145deg,rgba(2,18,29,.98),rgba(8,68,80,.58));box-shadow:0 34px 90px rgba(0,7,14,.25)}
.contract-toolbar,.starter-frame-bar{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:14px 18px;color:var(--faint);font-family:var(--mono);font-size:8px;letter-spacing:.1em}
.contract-source pre{margin:0;padding:clamp(34px,5vw,64px);overflow:auto;color:var(--muted);font-family:var(--mono);font-size:clamp(11px,1.1vw,14px);line-height:2;white-space:pre-wrap}
.contract-source code span,.package-tree span{color:var(--accent)}
.detail-meta{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line);margin-bottom:12vh}
.detail-meta>div{min-height:102px;border-right:1px solid var(--line);padding:22px 20px}
.detail-meta>div:last-child{border-right:0}
.detail-meta dt{margin-bottom:13px;color:var(--faint);font-family:var(--mono);font-size:7px;letter-spacing:.12em}
.detail-meta dd{margin:0;color:var(--ink);font-size:13px;line-height:1.5}
.why-section{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(340px,.7fr);gap:clamp(60px,9vw,140px);align-items:start;padding:3vh 0 14vh}
.why-section>h2{max-width:12ch;margin:0;font-size:clamp(53px,6.4vw,88px);line-height:.91}
.why-rails article{border-bottom:1px solid var(--line);padding:0 0 28px;margin-bottom:28px}
.why-rails article:last-child{margin-bottom:0}
.why-rails h3{margin-bottom:10px;font-family:var(--ui);font-size:19px;font-weight:600;letter-spacing:-.02em}
.why-rails p{max-width:30em;margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.starter-section{padding:4vh 0 14vh}
.starter-heading{display:grid;grid-template-columns:minmax(0,.78fr) minmax(280px,.42fr);column-gap:clamp(52px,9vw,150px);align-items:end;margin-bottom:44px}
.starter-heading .eyebrow{grid-column:1/-1}
.starter-heading h2{max-width:11ch;margin:0;font-size:clamp(52px,6vw,84px);line-height:.91}
.starter-heading>p:not(.eyebrow){margin:0 0 18px;color:var(--muted);font-size:15px;line-height:1.7}
.starter-heading>a{justify-self:start}
.starter-frame{border:1px solid var(--line-strong);background:var(--detail-panel);box-shadow:0 34px 100px rgba(0,7,14,.26)}
.starter-frame iframe{display:block;width:100%;height:min(72vw,760px);min-height:620px;border:0;background:#0d1513}
.state-section{display:grid;grid-template-columns:minmax(300px,.68fr) minmax(0,1.32fr);gap:clamp(52px,8vw,120px);align-items:end;border-top:1px solid var(--line);padding:11vh 0 13vh}
.state-heading h2{max-width:10ch;margin-bottom:22px;font-size:clamp(48px,5.4vw,74px);line-height:.94}
.state-heading p{max-width:34em;margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.state-flow{display:grid;grid-template-columns:repeat(7,minmax(82px,1fr));margin:0;padding:0;overflow:auto;list-style:none}
.state-flow li{position:relative;min-height:112px;border-top:1px solid var(--line-strong);padding:24px 16px 12px 0;color:var(--muted);font-family:var(--mono);font-size:8px;letter-spacing:.08em;white-space:nowrap}
.state-flow li:not(:last-child):after{content:"→";position:absolute;top:19px;right:12px;color:var(--accent)}
.state-flow li:last-child{color:var(--ink)}
.contract-section{display:grid;grid-template-columns:minmax(280px,.62fr) minmax(0,1.38fr);gap:clamp(58px,9vw,140px);align-items:start;padding:3vh 0 14vh}
.contract-heading{position:sticky;top:110px}
.contract-heading h2{max-width:9ch;margin-bottom:22px;font-size:clamp(50px,5.6vw,78px);line-height:.92}
.contract-heading p{max-width:31em;margin:0;color:var(--muted);font-size:14px;line-height:1.72}
.contract-rows{margin:0;border-top:1px solid var(--line-strong)}
.contract-rows>div{display:grid;grid-template-columns:150px minmax(0,1fr);gap:24px;border-bottom:1px solid var(--line);padding:25px 0}
.contract-rows dt{font-family:var(--display);font-size:26px;letter-spacing:-.04em}
.contract-rows dd{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.package-section{display:grid;grid-template-columns:minmax(280px,.7fr) minmax(0,1.3fr);gap:clamp(58px,9vw,140px);align-items:center;border-top:1px solid var(--line);padding:12vh 0 14vh}
.package-copy h2{max-width:9ch;margin-bottom:22px;font-size:clamp(52px,5.8vw,80px);line-height:.92}
.package-copy p{max-width:31em;margin-bottom:26px;color:var(--muted);font-size:14px;line-height:1.72}
.package-tree{margin:0;border:1px solid var(--line-strong);padding:clamp(28px,4vw,48px);overflow:auto;background:linear-gradient(145deg,rgba(2,18,29,.96),rgba(7,57,70,.56));color:var(--muted);font-family:var(--mono);font-size:clamp(10px,1.1vw,13px);line-height:2;white-space:pre}
.install-section{border-top:1px solid var(--line);padding:12vh 0 14vh}
.install-heading{max-width:780px;margin-bottom:54px}
.install-heading h2{max-width:11ch;margin-bottom:24px;font-size:clamp(52px,6vw,84px);line-height:.92}
.install-heading>p:not(.eyebrow){max-width:48em;margin-bottom:22px;color:var(--muted);font-size:15px;line-height:1.72}
.install-methods{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:1px;background:var(--line)}
.install-methods article{min-width:0;padding:clamp(28px,4vw,46px);background:var(--detail-panel)}
.install-methods h3{margin-bottom:14px;font-family:var(--ui);font-size:21px;font-weight:600;letter-spacing:-.02em}
.install-methods p{max-width:42em;color:var(--muted);font-size:13px;line-height:1.7}
.install-methods pre{margin:26px 0 20px;padding:22px;overflow:auto;background:rgba(0,9,15,.62);color:var(--ink);font-family:var(--mono);font-size:10px;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere}
.install-methods button{min-height:44px;border-bottom:1px solid var(--accent);padding:8px 0;background:transparent;color:var(--ink);cursor:pointer;font-family:var(--mono);font-size:8px;letter-spacing:.11em}
.install-methods button:active{transform:translateY(1px)}
.copy-status{min-height:22px;margin:12px 0 0!important;color:var(--accent)!important;font-family:var(--mono);font-size:8px!important;letter-spacing:.08em}
.evidence-section{display:grid;grid-template-columns:minmax(260px,.58fr) minmax(0,1.42fr);gap:clamp(50px,8vw,120px);border-top:1px solid var(--line);padding:12vh 0 14vh}
.evidence-copy h2{max-width:9ch;margin-bottom:22px;font-size:clamp(50px,5.6vw,78px);line-height:.92}
.evidence-copy p{max-width:30em;color:var(--muted);font-size:14px;line-height:1.72}
.evidence-numbers{display:grid;grid-template-columns:repeat(3,1fr);align-self:start;margin:0;border-top:1px solid var(--line-strong)}
.evidence-numbers>div{padding:24px 16px 24px 0}
.evidence-numbers dt{margin-bottom:6px;font-family:var(--display);font-size:clamp(54px,6vw,82px);line-height:1}
.evidence-numbers dd{max-width:15em;margin:0;color:var(--muted);font-size:12px;line-height:1.55}
.limits{grid-column:2;border-left:1px solid var(--line-strong);padding-left:32px}
.limits h3{margin-bottom:21px;font-family:var(--ui);font-size:18px;font-weight:600;letter-spacing:-.01em}
.limits ul{margin:0;padding:0;list-style:none}
.limits li{position:relative;max-width:52em;margin-bottom:13px;padding-left:18px;color:var(--muted);font-size:13px;line-height:1.65}
.limits li:before{content:"+";position:absolute;left:0;color:var(--accent);font-family:var(--mono)}
.source-close{border-top:1px solid var(--line);padding:10vh 0 12vh}
.source-close>p{margin-bottom:18px;color:var(--accent);font-family:var(--mono);font-size:8px;letter-spacing:.11em}
.source-close h2{max-width:15ch;margin-bottom:30px;font-size:clamp(48px,5.5vw,76px);line-height:.94}
@media(max-width:980px){.skill-detail-hero{grid-template-columns:minmax(0,.78fr) minmax(380px,1.22fr);gap:36px}.detail-hero-copy h1{font-size:clamp(58px,8vw,78px)}.why-section,.state-section,.contract-section,.package-section,.evidence-section{grid-template-columns:1fr}.why-section{gap:54px}.why-rails{max-width:720px}.starter-heading{grid-template-columns:1fr}.starter-heading>p:not(.eyebrow){margin-top:24px}.state-section{align-items:start}.state-flow{margin-top:24px}.contract-heading{position:relative;top:0}.contract-rows{max-width:760px}.package-tree{width:100%}.limits{grid-column:1}.detail-meta{grid-template-columns:repeat(2,1fr)}.detail-meta>div:nth-child(2){border-right:0}.detail-meta>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media(max-width:680px){.skill-detail-hero{display:block;min-height:auto;padding-top:102px;padding-bottom:74px}.detail-back{margin-bottom:30px}.detail-hero-copy h1{max-width:9ch;font-size:clamp(54px,15vw,66px)}.detail-deck{font-size:15px}.contract-source{margin-top:48px}.contract-source pre{padding:31px 20px;font-size:10px}.detail-meta{grid-template-columns:1fr;margin-bottom:82px}.detail-meta>div{min-height:0;border-right:0;border-bottom:1px solid var(--line);padding:18px 0}.detail-meta>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.detail-meta>div:last-child{border-bottom:0}.why-section{padding-bottom:96px}.why-section>h2{font-size:49px}.why-rails h3{font-size:18px}.starter-section{padding-bottom:96px}.starter-heading h2,.install-heading h2{font-size:49px}.starter-frame{margin-inline:-12px}.starter-frame-bar{padding:12px;font-size:7px}.starter-frame iframe{height:760px;min-height:0}.state-section{padding:82px 0 92px}.state-heading h2,.contract-heading h2,.package-copy h2,.evidence-copy h2{font-size:47px}.state-flow{grid-template-columns:repeat(7,112px);padding-bottom:10px}.state-flow li{min-height:92px}.contract-section{gap:46px;padding-bottom:96px}.contract-rows>div{grid-template-columns:1fr;gap:9px;padding:21px 0}.contract-rows dt{font-size:23px}.package-section{gap:46px;padding:90px 0 96px}.package-tree{padding:22px 18px;font-size:9px}.install-section{padding:90px 0 96px}.install-heading{margin-bottom:38px}.install-methods{grid-template-columns:1fr}.install-methods article{padding:28px 22px}.evidence-section{gap:44px;padding:90px 0 96px}.evidence-numbers{grid-template-columns:1fr}.evidence-numbers>div{display:grid;grid-template-columns:90px 1fr;align-items:center;border-bottom:1px solid var(--line);padding:17px 0}.evidence-numbers dt{margin:0;font-size:56px}.limits{padding-left:22px}.source-close{padding:80px 0 92px}.source-close h2{font-size:46px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Keep the detail page editorial without turning every section into a billboard. */
.detail-hero-copy h1{max-width:13ch;font-size:clamp(52px,5.6vw,76px);line-height:.94}
.why-section>h2,.starter-heading h2,.install-heading h2{max-width:18ch;font-size:clamp(40px,4.3vw,56px);line-height:1.03}
.state-heading h2,.contract-heading h2,.package-copy h2,.evidence-copy h2{max-width:16ch;font-size:clamp(38px,4vw,52px);line-height:1.05}
.source-close h2{max-width:20ch;font-size:clamp(38px,4vw,54px);line-height:1.05}
html[lang="zh-CN"] .skill-detail-page h1,html[lang="zh-CN"] .skill-detail-page h2{max-width:none;font-family:var(--ui);font-weight:600;letter-spacing:-.04em;line-height:1.14}
html[lang="zh-CN"] .detail-hero-copy h1{font-size:clamp(44px,4.8vw,62px)}
html[lang="zh-CN"] .why-section>h2,html[lang="zh-CN"] .starter-heading h2,html[lang="zh-CN"] .install-heading h2,html[lang="zh-CN"] .state-heading h2,html[lang="zh-CN"] .contract-heading h2,html[lang="zh-CN"] .package-copy h2,html[lang="zh-CN"] .evidence-copy h2{font-size:clamp(34px,3.4vw,44px)}
@media(max-width:900px) and (min-width:681px){
  .skill-detail-hero{grid-template-columns:1fr;align-items:start;gap:48px}
  .detail-hero-copy h1{max-width:18ch;font-size:50px}
  .contract-source{max-width:720px}
}
@media(max-width:680px){
  .detail-hero-copy h1{max-width:14ch;font-size:42px;line-height:1.02}
  .why-section>h2,.starter-heading h2,.install-heading h2,.state-heading h2,.contract-heading h2,.package-copy h2,.evidence-copy h2,.source-close h2{max-width:17ch;font-size:32px;line-height:1.12}
  html[lang="zh-CN"] .detail-hero-copy h1{max-width:none;font-size:36px;line-height:1.16}
  html[lang="zh-CN"] .why-section>h2,html[lang="zh-CN"] .starter-heading h2,html[lang="zh-CN"] .install-heading h2,html[lang="zh-CN"] .state-heading h2,html[lang="zh-CN"] .contract-heading h2,html[lang="zh-CN"] .package-copy h2,html[lang="zh-CN"] .evidence-copy h2,html[lang="zh-CN"] .source-close h2{max-width:none;font-size:30px;line-height:1.2}
}