/* TEMPLATE-034：钢蓝雾白观察手册，公共样式与首页 */
:root{
    --j-accent:#36586F;--j-accent-deep:#294454;--j-accent-bright:#C7A56A;
    --j-ink:#1F2D37;--j-ink-2:#2B3F4D;--j-paper:#F3F5F6;--j-surface:#fff;
    --j-line:#D8E0E5;--j-text:#243541;--j-text-2:#596B77;--j-soft:#E7EDF1;
    --j-sans:'PingFang SC','Microsoft YaHei','Noto Sans SC',Arial,sans-serif;
    --j-mono:'SFMono-Regular',Consolas,'Liberation Mono',monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:24px}
body{margin:0;background:var(--j-paper);color:var(--j-text);font:15px/1.8 var(--j-sans)}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease}
a:hover{color:var(--j-accent)}
img{display:block;max-width:100%;height:auto}
ul,ol{list-style:none;margin:0;padding:0}
p{margin:0 0 1em}
h1,h2,h3{margin:0;line-height:1.45;overflow-wrap:anywhere}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
button,input{max-width:100%}
button{border:0}
figure{margin:0}
.container,.j-wrap{width:100%;max-width:1280px;margin-right:auto;margin-left:auto;padding-right:28px;padding-left:28px}
.j-sr-only,.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.j-skip-link{position:fixed;left:16px;top:-80px;padding:12px 18px;background:var(--j-ink);color:#fff;z-index:3000}
.j-skip-link:focus{top:12px;color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--j-accent-bright);outline-offset:4px}
.j-progress{position:fixed;top:0;left:0;width:0;height:3px;z-index:2200;background:var(--j-accent-bright);pointer-events:none}
.j-eyebrow{font-size:12px;letter-spacing:.16em;color:var(--j-accent);margin:0 0 14px}
.j-text-link{display:inline-flex;gap:28px;align-items:center;font-size:13px;font-weight:700;border-bottom:1px solid var(--j-accent);padding-bottom:5px;color:var(--j-accent)}
.j-text-link:hover{color:var(--j-ink)}
.j-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:10px 24px;font-size:14px;font-weight:600;border:1px solid transparent;border-radius:4px;text-align:center}
.j-btn-primary{background:var(--j-accent);border-color:var(--j-accent);color:#fff}
.j-btn-primary:hover{background:var(--j-accent-deep);color:#fff}
.j-btn-ghost,.j-btn-outline{border-color:var(--j-line);color:var(--j-accent);background:var(--j-surface)}
.j-btn-ghost:hover,.j-btn-outline:hover{border-color:var(--j-accent);background:var(--j-soft)}

/* 紧凑横向站头 */
.j-header{background:var(--j-surface);border-bottom:1px solid var(--j-line)}
.j-utility{background:var(--j-ink);color:#CBD5DC;font-size:11px;letter-spacing:.08em}
.j-utility-in{display:flex;justify-content:space-between;gap:12px;padding-top:7px;padding-bottom:7px}
.j-header-date{white-space:nowrap}
.j-header-main{display:flex;align-items:center;gap:30px;min-height:104px;padding-top:20px;padding-bottom:20px}
.j-brand{display:flex;align-items:center;gap:12px;flex:0 1 320px;min-width:0}
.j-brand-mark{display:grid;place-items:center;width:48px;height:54px;flex-shrink:0;background:var(--j-accent);color:#fff;font-size:24px;position:relative}
.j-brand-mark::after{content:'';width:16px;height:3px;position:absolute;bottom:6px;background:var(--j-accent-bright)}
.j-brand-text{min-width:0;display:flex;flex-direction:column;gap:4px}
.j-brand-text strong{font-size:20px;line-height:1.4;color:var(--j-ink);overflow-wrap:anywhere}
.j-brand-text>span{font-size:10px;letter-spacing:.12em;color:var(--j-text-2)}
.j-nav{flex:1;min-width:0}
.j-nav-list{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:4px 18px}
.j-nav-item{position:relative}
.j-nav-item>a{display:block;padding:9px 0;font-size:14px;font-weight:600;border-bottom:2px solid transparent}
.j-nav-item>a:hover,.j-nav-item.is-current>a{border-color:var(--j-accent);color:var(--j-accent)}
.j-sub{display:none;position:absolute;z-index:100;left:0;top:100%;width:180px;background:var(--j-surface);border:1px solid var(--j-line);box-shadow:0 12px 30px #1F2D3712;padding:8px}
.j-sub a{display:block;padding:8px 10px;font-size:13px}
.j-sub a:hover{background:var(--j-soft)}
.j-nav-item:hover .j-sub,.j-nav-item:focus-within .j-sub{display:block}
.j-search-jump{display:flex;gap:14px;align-items:center;white-space:nowrap;font-size:13px;border-left:1px solid var(--j-line);padding:10px 0 10px 24px}
.j-burger{display:none;background:none;width:40px;height:40px;padding:9px}
.j-burger span{display:block;height:2px;background:var(--j-ink);margin:5px 0;width:22px}
.j-overlay{position:fixed;inset:0;z-index:850;background:#1F2D3799}

/* 文字导读首屏 */
.j-intro{padding-top:62px;padding-bottom:48px;display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:70px;align-items:end}
.j-intro-copy{min-width:0}
.j-intro h1{font-size:clamp(30px,4vw,53px);letter-spacing:-.02em;font-weight:750;line-height:1.45}
.j-intro h1 span{color:var(--j-accent);font-weight:500}
.j-intro-note{position:relative;padding-left:24px;border-left:2px solid var(--j-accent-bright);min-width:0}
.j-intro-note p{font-size:13px;color:var(--j-text-2);line-height:2}
.j-note-mark{position:absolute;right:8px;top:-28px;font-size:80px;font-weight:700;color:var(--j-line);line-height:1;z-index:-1;opacity:.6}
.j-section-nav{display:flex;align-items:center;gap:32px;flex-wrap:wrap;padding-top:16px;padding-bottom:16px;border-top:1px solid var(--j-line);font-size:12px}
.j-section-nav>a{padding:5px 0;color:var(--j-accent);font-weight:600}
.j-section-nav>span{margin-left:auto;color:var(--j-text-2);font-size:11px}
.j-focus{padding-top:16px}
.j-cover{display:grid;grid-template-columns:100px minmax(0,1fr) minmax(0,.92fr);background:var(--j-surface);border:1px solid var(--j-line);min-height:340px}
.j-cover-date{padding:30px 14px;text-align:center;border-right:1px solid var(--j-line);font-size:11px;color:var(--j-text-2)}
.j-cover-date time{display:block;margin-top:22px}
.j-cover-date strong{display:block;font:400 54px/1.2 var(--j-mono);color:var(--j-accent)}
.j-cover-date time span{display:block;font-size:10px;margin-top:6px}
.j-cover-copy{padding:36px 30px;display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.j-cover-copy h2{font-size:clamp(21px,2.1vw,28px);margin-bottom:18px;line-height:1.55}
.j-cover-desc{font-size:13px;color:var(--j-text-2);line-height:1.9;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:24px}
.j-cover-copy>.j-text-link{margin-top:auto}
.j-cover-media{position:relative;min-width:0;overflow:hidden;background:var(--j-soft)}
.j-cover-media img{width:100%;height:100%;min-height:340px;object-fit:cover;transition:transform .4s ease}
.j-cover-media:hover img{transform:scale(1.03)}
.j-cover-label{position:absolute;bottom:16px;left:16px;padding:6px 12px;background:var(--j-surface);color:var(--j-accent);font-size:11px}

/* 日期式条目流 */
.j-journal{padding-top:34px;padding-bottom:62px}
.j-section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.j-section-head h2{font-size:30px;font-weight:650}
.j-section-head .j-eyebrow{margin-bottom:8px}
.j-journal-list{border-top:1px solid var(--j-line)}
.j-entry{display:grid;grid-template-columns:112px minmax(0,1fr) 210px;gap:30px;border-bottom:1px solid var(--j-line);padding:28px 0;align-items:center}
.j-entry-date{display:flex;flex-direction:column;gap:6px;align-self:start;color:var(--j-text-2)}
.j-entry-date strong{font:400 27px/1.2 var(--j-mono);color:var(--j-accent)}
.j-entry-date span{font-size:11px}
.j-entry-copy{min-width:0}
.j-entry-copy h3{font-size:20px;line-height:1.6;margin-bottom:9px}
.j-entry-copy>p{font-size:13px;color:var(--j-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px}
.j-entry-link{font-size:11px;color:var(--j-accent);display:inline-flex;gap:18px;align-items:center}
.j-entry-media{overflow:hidden;display:block;background:var(--j-soft)}
.j-entry-media img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;transition:transform .4s ease}
.j-entry-media:hover img{transform:scale(1.04)}

/* 通栏热读榜 */
.j-popular{background:var(--j-accent);color:#fff;padding:54px 0 60px}
.j-popular .j-eyebrow{color:#E1E8ED}
.j-popular-note{font-size:12px;color:#D5E0E8}
.j-rank-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:reading;gap:0}
.j-rank-item{border-left:1px solid #ffffff36;padding:0 28px;counter-increment:reading}
.j-rank-item:first-child{padding-left:0;border-left:0}
.j-rank-item:last-child{padding-right:0}
.j-rank-item>a{display:flex;flex-direction:column;height:100%;color:#fff}
.j-rank-no{color:var(--j-accent-bright);font:400 40px/1.2 var(--j-mono);margin-bottom:18px}
.j-rank-no::before{content:counter(reading,decimal-leading-zero)}
.j-rank-item h3{font-size:17px;font-weight:500;line-height:1.8;margin-bottom:24px}
.j-rank-item a:hover h3{text-decoration:underline;text-underline-offset:5px}
.j-rank-meta{font-size:11px;color:#DBE5EC;display:flex;justify-content:space-between;margin-top:auto}

/* 专题导览与翻阅区 */
.j-topics{display:grid;grid-template-columns:280px minmax(0,1fr);gap:66px;padding-top:70px;padding-bottom:62px;align-items:center}
.j-topics-intro h2{font-size:32px;margin-bottom:18px;font-weight:600}
.j-topics-intro>p:not(.j-eyebrow){font-size:13px;color:var(--j-text-2)}
.j-topics-body{min-width:0;padding:36px;background:var(--j-surface);border-left:3px solid var(--j-accent-bright)}
.j-reading-end{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:60px;align-items:start;padding-top:25px;padding-bottom:26px;border-top:1px solid var(--j-line)}
.j-quickreads{min-width:0}
.j-quickreads .j-section-head{margin-bottom:12px}
.j-reading-end .j-ad{margin:0;width:100%}
.j-ad{display:grid;place-items:center;border:1px dashed var(--j-line);background:var(--j-soft);color:var(--j-text-2);font-size:12px;line-height:1.8;text-align:center}
.j-ad span{padding:20px;max-width:100%;overflow-wrap:anywhere}
.j-ad--wide{width:calc(100% - 56px);max-width:1224px;min-height:112px;margin:32px auto}
.j-ad--square{min-height:250px;margin:20px 0}

/* 阅读页脚 */
.j-footer{margin-top:64px;background:var(--j-surface);border-top:1px solid var(--j-line)}
.j-footer-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:70px;align-items:center;padding-top:56px;padding-bottom:48px}
.j-footer-intro h2{font-size:30px;font-weight:600;margin-bottom:16px}
.j-footer-intro>p:last-child{color:var(--j-text-2);font-size:13px;margin:0}
.j-footer-search{min-width:0}
.j-footer-search>label{display:block;font-size:13px;margin-bottom:12px;font-weight:600}
.j-footer-search .j-search-form{margin-bottom:24px}
.j-footer-search .j-search-form button{border-radius:0}
.j-footer-links{display:flex;gap:12px 24px;flex-wrap:wrap;font-size:12px;color:var(--j-text-2)}
.j-footer-bottom{background:var(--j-ink);color:#D2DDE4}
.j-footer-meta{display:flex;align-items:center;justify-content:space-between;gap:12px 26px;flex-wrap:wrap;padding-top:18px;padding-bottom:18px;font-size:11px}
.j-footer-meta a:hover{color:#fff}

/* 浮动工具 */
.j-float{position:fixed;right:14px;bottom:18px;z-index:800;display:flex;flex-direction:column;gap:5px}
.j-float-item{position:relative;display:grid;place-items:center;width:42px;height:42px;color:var(--j-accent);border:1px solid var(--j-line);background:var(--j-surface);border-radius:4px}
.j-float-item:hover{background:var(--j-accent);color:#fff}
.j-float-top{background:var(--j-ink);color:#fff;font-size:9px;line-height:1;gap:3px;padding:5px 0;grid-template-rows:1fr auto}
.j-float-pop{position:absolute;right:50px;top:50%;transform:translateY(-50%);background:var(--j-ink);color:#fff;padding:8px 12px;white-space:nowrap;font-size:12px;visibility:hidden;opacity:0;border-radius:4px}
.j-float-item:hover .j-float-pop,.j-float-item:focus .j-float-pop{visibility:visible;opacity:1}
.j-float-qr{text-align:center;line-height:1.8}

@media(max-width:1100px){
    .j-header-main{gap:20px}.j-brand{flex-basis:280px}.j-nav-list{gap:4px 14px}
    .j-intro{gap:32px}.j-cover{grid-template-columns:80px minmax(0,1fr) minmax(0,.85fr)}
    .j-cover-copy{padding:26px 24px}.j-cover-date{padding:26px 8px}
    .j-cover-date strong{font-size:44px}.j-entry{grid-template-columns:90px minmax(0,1fr) 180px;gap:24px}
}
@media(max-width:860px){
    .j-header-main{min-height:86px}.j-brand{flex:1}.j-search-jump{margin-left:auto}.j-burger{display:block;position:relative;z-index:1000}
    .j-nav{position:fixed;inset:0 0 0 auto;width:min(380px,100%);z-index:900;background:var(--j-surface);display:none;padding:84px 30px 30px;overflow:auto}
    .j-nav-list{display:block}.j-nav-item>a{font-size:18px;padding:14px 0;border-bottom:1px solid var(--j-line)}
    .j-sub{display:block;position:static;box-shadow:none;width:auto;border:0;background:var(--j-soft);padding:4px 14px}.j-sub a{padding:8px 0}
    body.j-nav-open .j-nav{display:block}body.j-nav-open{overflow:hidden}
    body.j-nav-open .j-burger{position:fixed;right:20px;top:20px}
    body.j-nav-open .j-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    body.j-nav-open .j-burger span:nth-child(2){opacity:0}
    body.j-nav-open .j-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
    body.j-nav-open .j-float{display:none}
    .j-intro{padding-top:42px;padding-bottom:34px}.j-intro-note{padding-left:18px}.j-intro h1{font-size:34px}
    .j-section-nav{gap:22px}.j-section-nav>span{display:none}
    .j-cover{grid-template-columns:82px minmax(0,1fr)}.j-cover-copy{padding:26px}
    .j-cover-media{grid-column:1/-1;max-height:380px}.j-cover-media img{min-height:0;aspect-ratio:2/1;height:auto}
    .j-entry{grid-template-columns:76px minmax(0,1fr) 150px;gap:20px}.j-entry-copy h3{font-size:18px}
    .j-rank-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 0}.j-rank-item:nth-child(3){padding-left:0;border-left:0}
    .j-topics{grid-template-columns:220px minmax(0,1fr);gap:28px}.j-topics-body{padding:24px}
    .j-reading-end{gap:28px;grid-template-columns:minmax(0,1fr) 260px}.j-footer-top{gap:32px}
}
@media(max-width:640px){
    .j-utility-in>span:first-child{display:none}.j-utility-in{justify-content:center}
    .j-intro{grid-template-columns:minmax(0,1fr);gap:26px}.j-intro h1{font-size:36px}
    .j-intro-note{max-width:100%}.j-note-mark{right:10px;top:4px}
    .j-entry{grid-template-columns:minmax(0,1fr) 118px;gap:12px 20px}.j-entry-date{grid-column:1/-1;flex-direction:row;align-items:center;gap:12px}
    .j-entry-date strong{font-size:20px}.j-entry-copy h3{font-size:16px}.j-entry-copy>p{-webkit-line-clamp:2;font-size:12px}.j-entry-media{align-self:start}
    .j-topics{grid-template-columns:minmax(0,1fr);gap:26px;padding-top:45px;padding-bottom:40px}.j-topics-intro h2{font-size:28px}
    .j-topics-intro h2 br{display:none}.j-topics-intro p br{display:none}
    .j-reading-end{grid-template-columns:minmax(0,1fr);gap:24px}.j-reading-end .j-ad{max-width:100%}
    .j-footer-top{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:36px;padding-bottom:32px}
    .j-footer-intro h2{font-size:27px}.j-section-head h2{font-size:26px}
}
@media(max-width:480px){
    .container,.j-wrap{padding-left:18px;padding-right:18px}.j-header-main{gap:10px}
    .j-brand-mark{width:36px;height:44px;font-size:20px}.j-brand{gap:9px}.j-brand-text strong{font-size:15px}.j-brand-text>span{font-size:9px;letter-spacing:0}
    .j-search-jump{display:none}.j-burger{flex-shrink:0}.j-intro h1{font-size:29px}
    .j-intro .j-eyebrow{font-size:11px;letter-spacing:.04em}.j-section-nav{gap:18px;font-size:11px}
    .j-cover{grid-template-columns:minmax(0,1fr)}.j-cover-date{padding:12px 18px;text-align:left;border-right:0;border-bottom:1px solid var(--j-line);display:flex;align-items:center;justify-content:space-between;gap:14px}
    .j-cover-date time{display:flex;margin:0;align-items:center;gap:10px}.j-cover-date strong{font-size:27px}.j-cover-date time span{margin:0}
    .j-cover-copy{padding:22px 18px}.j-cover-copy h2{font-size:21px}.j-cover-desc{-webkit-line-clamp:2}
    .j-cover-media img{aspect-ratio:3/2}.j-cover-label{font-size:10px;bottom:12px;left:12px}
    .j-entry{grid-template-columns:minmax(0,1fr) 94px;gap:12px 14px}.j-entry-copy h3{font-size:15px}.j-entry-copy>p{display:none}
    .j-entry-link{font-size:10px}.j-entry-media img{aspect-ratio:1/1}.j-journal{padding-top:20px;padding-bottom:40px}
    .j-section-head{gap:12px;margin-bottom:20px}.j-text-link{gap:14px;font-size:12px}
    .j-popular{padding:38px 0}.j-rank-list{grid-template-columns:minmax(0,1fr);gap:0}
    .j-rank-item,.j-rank-item:first-child,.j-rank-item:nth-child(3){border-left:0;border-top:1px solid #ffffff36;padding:20px 0}
    .j-rank-item>a{display:grid;grid-template-columns:42px minmax(0,1fr);gap:8px 14px}
    .j-rank-no{font-size:27px;margin:0;grid-row:1/3}.j-rank-item h3{font-size:16px;margin:0}.j-rank-meta{grid-column:2}
    .j-topics-body{padding:20px 16px}.j-ad--wide{width:calc(100% - 36px);margin:24px auto;min-height:90px}
    .j-float{right:8px;bottom:10px;gap:4px}.j-float-item{width:36px;height:36px}.j-footer-meta{font-size:10px;justify-content:flex-start}
}
@media(prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}
}