/* 寸光 cunguang.cn · 一寸之光
   冷白纸面上，一根液态玻璃光柱折射标题；全站只有一个深色篇章；细线网格，轻字重，极少的字。
   全部系统字体，不加载任何境外资源。 */
:root{
  --bg:#F5F5F7; --bg-2:#EBEBEF; --surface:#FFFFFF;
  --ink:#0B0B0F; --ink-2:#55565E; --ink-3:#8E8F96; --ink-dim:#CFCFD6;
  --line:rgba(11,11,15,.09); --line-2:rgba(11,11,15,.18);
  --blue:#2453FF; --violet:#7B4DFF;
  --glass:rgba(245,245,247,.74);
  --btn:#0B0B0F; --btn-fg:#FFFFFF;
  /* 深色篇章 */
  --nb:#0B0B0E; --nb-ink:#EDEDEF; --nb-ink-2:#A1A1AA; --nb-ink-3:#63636B; --nb-line:rgba(255,255,255,.1);
  --f:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --gut:clamp(20px,4.5vw,64px);
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light;
}
@view-transition{navigation:auto}
::view-transition-old(root){animation:vt-out .3s ease both}
::view-transition-new(root){animation:vt-in .6s var(--ease) both}
@keyframes vt-out{to{opacity:0;filter:blur(10px)}}
@keyframes vt-in{from{opacity:0;filter:blur(14px)}}

*{box-sizing:border-box}
/* hidden 属性必须压过组件里的 display（表单、提交成功面板都靠它切换） */
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f);font-size:1rem;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,p,ul,ol,dl,dd,figure,blockquote{margin:0;padding:0}
h1,h2,h3{font-weight:400;letter-spacing:-.035em;line-height:1.12;text-wrap:balance;font-feature-settings:"palt" 1}
a{color:inherit}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
.wrap{max-width:1440px;margin-inline:auto;padding-inline:var(--gut)}
.eyebrow{font-size:.8125rem;color:var(--ink-3);letter-spacing:.01em}
.pdot{display:inline-block;width:.15em;height:.15em;border-radius:50%;background:var(--violet);margin-left:.06em;vertical-align:.02em}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--btn);color:var(--btn-fg);padding:8px 14px;border-radius:8px}
.skip:focus{left:8px}

/* ── 标志 ── */
.lockup{display:inline-flex;align-items:center;gap:.34em;text-decoration:none;font-size:20px;font-weight:500;letter-spacing:.1em;line-height:1}
.lockup img{width:1.3em;height:1.3em;flex:none}

/* ── 通栏导航 ── */
.nav{position:fixed;z-index:50;top:0;left:0;right:0;padding-top:env(safe-area-inset-top,0px);transition:color .4s;view-transition-name:nav}
.nav-in{height:68px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;border-radius:0;transition:margin .45s var(--ease),width .45s var(--ease),border-radius .45s var(--ease),background .4s,box-shadow .4s,padding .45s var(--ease),height .45s var(--ease)}
.nav.solid .nav-in{margin-top:10px;width:calc(100% - 20px);height:60px;border-radius:18px;padding-inline:max(16px,calc(var(--gut) - 10px));background:var(--glass);-webkit-backdrop-filter:blur(18px) saturate(1.6);backdrop-filter:blur(18px) saturate(1.6);box-shadow:0 0 0 1px var(--line),0 10px 30px rgba(11,11,15,.06)}
.nav.ondark{color:var(--nb-ink)}
.nav.ondark .nav-in{background:rgba(11,11,14,.62);box-shadow:0 0 0 1px var(--nb-line),0 10px 30px rgba(0,0,0,.3)}
.links{display:flex;gap:6px}
.links a{text-decoration:none;font-size:.9375rem;padding:7px 16px;border-radius:99px;opacity:.66;transition:opacity .25s,background .25s}
.links a:hover,.links a[aria-current]{opacity:1}
.links a[aria-current]{background:color-mix(in srgb,currentColor 8%,transparent)}
.nav-r{justify-self:end;display:flex;align-items:center;gap:10px}
.cta-s{text-decoration:none;font-size:.9375rem;padding:8px 18px;border-radius:99px;background:var(--btn);color:var(--btn-fg);transition:transform .25s var(--ease)}
.nav.ondark .cta-s{background:var(--nb-ink);color:var(--nb)}
.cta-s:hover{transform:translateY(-1px)}
.menu{display:none;width:36px;height:36px;border:0;background:none;cursor:pointer;position:relative}
.menu i{position:absolute;left:9px;right:9px;height:1.5px;background:currentColor;transition:transform .3s var(--ease)}
.menu i:first-child{top:14px}.menu i:last-child{top:21px}
.nav.open .menu i:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav.open .menu i:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.mlinks{display:none}
@media (max-width:760px){
  .nav-in{grid-template-columns:1fr auto}.links,.cta-s{display:none}.menu{display:block}
  .nav.open{background:var(--bg);color:var(--ink)}
  .nav.open .nav-in{background:none;box-shadow:none;margin-top:0;width:auto;border-radius:0}
  .mlinks{display:flex;flex-direction:column;max-height:0;overflow:hidden;transition:max-height .5s var(--ease)}
  .nav.open .mlinks{max-height:360px}
  .mlinks a{text-decoration:none;font-size:1.5rem;padding:14px 0;border-top:1px solid var(--line)}
  .mlinks a:last-child{margin-bottom:16px}
}

/* ── 玻璃页头 ── */
.gh{position:relative;overflow:hidden;background:var(--bg)}
.gh canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y}
.hero{height:max(640px,100svh)}
.ph{height:clamp(420px,62svh,620px)}
.gh .t{position:absolute;left:var(--gut);right:var(--gut);font-weight:400;letter-spacing:-.045em;line-height:1.06}
.hero .t{bottom:96px;font-size:clamp(52px,10.5vw,176px)}
.ph .t{bottom:72px;font-size:clamp(46px,8.5vw,140px)}
.gl-on .t{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.gh .copy{position:absolute;right:var(--gut);bottom:96px;width:min(360px,34vw);display:flex;flex-direction:column;gap:22px;animation:rise 1s var(--ease) 1s both}
.ph .copy{bottom:76px;animation-delay:.6s}
.gh .copy p{color:var(--ink-2);font-size:1rem;line-height:1.8;text-wrap:pretty}
.gh .copy p+p{margin-top:-8px}
@keyframes rise{from{opacity:0;transform:translateY(14px)}}
.btns{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-size:.9375rem;padding:12px 20px;border-radius:99px;border:0;cursor:pointer;transition:transform .3s var(--ease),background .3s,box-shadow .3s}
.btn .ar{display:inline-block;transition:transform .3s var(--ease)}
.btn:hover .ar{transform:translateX(4px)}
.btn-p{background:var(--btn);color:var(--btn-fg)}
.btn-l{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-2)}
.btn-l:hover{box-shadow:inset 0 0 0 1px var(--ink)}
.btn[disabled]{opacity:.5;cursor:default}
@media (max-width:900px){
  .hero .t{bottom:230px}.gh .copy{left:var(--gut);right:auto;width:auto;max-width:30em;bottom:48px}
  .ph .t{bottom:150px}.ph .copy{bottom:44px}
}

/* ── 品牌主张 ── */
.state{padding-block:clamp(120px,15vw,220px);border-top:1px solid var(--line)}
.lit{font-size:clamp(1.9rem,1rem + 3.4vw,4.4rem);font-weight:400;letter-spacing:-.045em;line-height:1.3;max-width:16em;font-feature-settings:"palt" 1}
.lit span{color:var(--ink-dim);transition:color .5s}
.lit span.on{color:var(--ink)}
.lit span.b.on{color:var(--blue)}
.lit span.v.on{color:var(--violet)}

/* ── 深色篇章 ── */
.band{background:var(--nb);color:var(--nb-ink);padding-block:clamp(96px,11vw,168px)}
.band .eyebrow{color:var(--nb-ink-3)}
.band-h{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:24px;margin-bottom:clamp(48px,6vw,88px)}
.band-h h2{font-size:clamp(2.2rem,1.3rem + 3.4vw,4.8rem);margin-top:14px;letter-spacing:-.05em}
.band .link{color:var(--nb-ink-2)}
.band .link:hover{color:var(--nb-ink)}
.cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--nb-line);border-left:1px solid var(--nb-line)}
.col{position:relative;display:flex;flex-direction:column;text-decoration:none;border-right:1px solid var(--nb-line);border-bottom:1px solid var(--nb-line);transition:background .4s}
.col:hover{background:rgba(255,255,255,.02)}
.viz{position:relative;aspect-ratio:1/.9;border-bottom:1px solid var(--nb-line);overflow:hidden;background:var(--nb)}
.viz canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.col .tx{padding:28px 28px 32px;display:flex;flex-direction:column;gap:10px;min-height:190px}
.col h3{font-size:clamp(1.5rem,1.15rem + 1vw,2.1rem);display:flex;justify-content:space-between;align-items:center}
.col h3 .ar{font-size:.6em;opacity:0;transform:translateX(-8px);transition:opacity .3s,transform .4s var(--ease)}
.col:hover h3 .ar{opacity:1;transform:none}
.col p{color:var(--nb-ink-2);font-size:.9688rem;max-width:22em}
@media (max-width:900px){.cols{grid-template-columns:1fr}.viz{aspect-ratio:1.5}}

/* ── 通用分区 ── */
.sec{padding-block:clamp(96px,11vw,160px)}
.sec.tight{padding-top:0}
.ruled{border-top:1px solid var(--line)}
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:clamp(36px,5vw,64px)}
.head h2{font-size:clamp(2rem,1.2rem + 2.8vw,3.8rem);letter-spacing:-.05em}
.head p{color:var(--ink-2);max-width:26em}
.link{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-size:.9375rem;color:var(--ink-2);transition:color .25s}
.link:hover{color:var(--ink)}
.link .ar{transition:transform .3s var(--ease)}
.link:hover .ar{transform:translateX(4px)}

/* 全球一线对话 */
.mq{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.mq+.mq{margin-top:18px}
.track{display:flex;gap:18px;width:max-content;animation:mq 70s linear infinite}
.mq.rev .track{animation-direction:reverse;animation-duration:84s}
.mq:hover .track{animation-play-state:paused}
.track img{width:120px;height:120px;border-radius:50%;object-fit:cover;object-position:50% 20%;background:#FFFFFF;filter:grayscale(1);transition:filter .5s,transform .5s var(--ease)}
.track img:hover{filter:none;transform:scale(1.06)}
@keyframes mq{to{transform:translateX(-50%)}}
@media (max-width:640px){.track img{width:92px;height:92px}.track{gap:12px}}

/* 全球网络 */
.logos{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line);list-style:none;padding:0;margin:0}
.logos li{height:132px;display:grid;place-items:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .4s}
.logos li:hover{background:var(--surface)}
.logos img{height:auto;filter:grayscale(1) contrast(1.15);opacity:.5;transition:filter .4s,opacity .4s}
.logos li:hover img{filter:none;opacity:1}
@media (max-width:860px){.logos{grid-template-columns:repeat(3,minmax(0,1fr))}.logos li{height:100px}.logos img{transform:scale(.78)}}

/* 新闻列表 */
.news{list-style:none;border-top:1px solid var(--line)}
.news a{display:grid;grid-template-columns:9em minmax(0,1fr) 28px;gap:28px;align-items:baseline;padding:26px 0;border-bottom:1px solid var(--line);text-decoration:none;transition:padding .4s var(--ease)}
.news a:hover{padding-left:12px}
.news .d{color:var(--ink-3);font-size:.875rem;font-variant-numeric:tabular-nums}
.news .t{font-size:clamp(1.1rem,1rem + .5vw,1.45rem);letter-spacing:-.02em;line-height:1.45}
.news .ar{opacity:0;transform:translateX(-10px);transition:opacity .3s,transform .4s var(--ease);color:var(--blue)}
.news a:hover .ar{opacity:1;transform:none}
.year+.year{margin-top:72px}
@media (max-width:640px){.news a{grid-template-columns:minmax(0,1fr);gap:6px;padding:20px 0}.news .ar{display:none}}

/* 联系引导 */
.cta{padding-block:clamp(110px,14vw,200px);border-top:1px solid var(--line)}
.cta-big{display:inline-flex;align-items:baseline;gap:.25em;text-decoration:none;font-size:clamp(3rem,1rem + 7.4vw,8.8rem);font-weight:400;letter-spacing:-.055em;line-height:1.04;background:linear-gradient(90deg,var(--blue),var(--violet)) left bottom/0% 3px no-repeat;padding-bottom:.06em;transition:background-size .8s var(--ease)}
.cta-big:hover{background-size:100% 3px}
.cta-big .ar{font-size:.45em;transition:transform .5s var(--ease)}
.cta-big:hover .ar{transform:translateX(.12em) rotate(-45deg)}
.cta p{margin-top:24px;color:var(--ink-2);max-width:32em}

/* 页脚 */
.foot{border-top:1px solid var(--line);padding-block:clamp(56px,7vw,96px) calc(28px + env(safe-area-inset-bottom,0px))}
.foot-top{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:28px}
.foot-b{display:flex;flex-direction:column;align-items:flex-start;gap:20px}
.foot-s{font-size:clamp(1.25rem,1rem + 1vw,1.75rem);letter-spacing:-.03em;line-height:1.3;color:var(--ink-2)}
.foot-n{display:flex;gap:6px;flex-wrap:wrap}
.foot-n a{text-decoration:none;font-size:.9375rem;color:var(--ink-2);padding:7px 14px;border-radius:99px;transition:background .25s,color .25s}
.foot-n a:hover{color:var(--ink);background:var(--bg-2)}
.legal{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 32px;margin-top:clamp(40px,5vw,64px);padding-top:20px;border-top:1px solid var(--line);font-size:.8125rem;color:var(--ink-3)}
.legal div{display:flex;flex-wrap:wrap;gap:6px 22px}
.legal a{text-decoration:none}
.legal a:hover{color:var(--ink)}
.ba{display:inline-flex;align-items:center;gap:6px}
.ba img{width:14px;height:auto}

/* ── 业务页 ── */
.biz{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px;row-gap:28px;align-items:center;padding-block:clamp(48px,6vw,96px);border-top:1px solid var(--line)}
.biz:first-child{border-top:0}
.biz .art{grid-column:1/span 6;position:relative;aspect-ratio:1.2;border-radius:6px;overflow:hidden;background:var(--nb)}
.biz .art canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.biz .txt{grid-column:8/span 5;display:flex;flex-direction:column;gap:16px}
.biz:nth-child(even) .art{grid-column:7/span 6;order:2}
.biz:nth-child(even) .txt{grid-column:1/span 5}
.biz h2{font-size:clamp(2rem,1.3rem + 2.4vw,3.6rem);letter-spacing:-.05em}
.biz p{color:var(--ink-2);font-size:1.0625rem;line-height:1.85}
@media (max-width:860px){.biz .art,.biz .txt,.biz:nth-child(even) .art,.biz:nth-child(even) .txt{grid-column:1/-1;order:0}}
.quote{margin-block:clamp(40px,6vw,80px) clamp(96px,10vw,140px);padding-top:32px;border-top:1px solid var(--line);display:grid;gap:28px}
.quote blockquote{font-size:clamp(1.3rem,1.05rem + 1vw,2.1rem);letter-spacing:-.03em;line-height:1.5;min-height:3.1em;max-width:30em;transition:opacity .5s,filter .5s}
.quote.swap blockquote,.quote.swap .who{opacity:0;filter:blur(8px)}
.quote .row{display:flex;justify-content:space-between;align-items:center;gap:16px}
.quote .who{color:var(--ink-3);transition:opacity .5s,filter .5s}
.qd{display:flex;gap:8px}
.qd button{width:26px;height:3px;border:0;border-radius:99px;background:var(--line-2);cursor:pointer;padding:0;transition:background .3s,width .4s var(--ease)}
.qd button.on{background:var(--ink);width:44px}

/* ── 关于页 ── */
.name{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px;row-gap:40px;align-items:center}
.name .mkbig{grid-column:1/span 5;aspect-ratio:1;display:grid;place-items:center;border:1px solid var(--line)}
.name .mkbig img{width:44%;height:44%}
.name .txt{grid-column:7/span 6;display:flex;flex-direction:column;gap:18px}
.name h2{font-size:clamp(2.4rem,1.4rem + 3.2vw,4.6rem);letter-spacing:-.055em;line-height:1.14}
.name p{color:var(--ink-2);max-width:30em}
@media (max-width:860px){.name .mkbig,.name .txt{grid-column:1/-1}.name .mkbig{max-width:420px}}

/* ── 新闻内容页 ── */
.art-v{padding-block:128px clamp(64px,8vw,120px)}
.back{text-decoration:none;color:var(--ink-3);font-size:.9375rem}
.back:hover{color:var(--ink)}
.art-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px;row-gap:28px;margin-top:clamp(12px,2vw,24px)}
.art-meta{grid-column:1/span 3;align-self:start;position:sticky;top:104px;display:flex;flex-direction:column;gap:14px;padding-top:14px;border-top:1px solid var(--line-2)}
.art-meta time{font-size:.9375rem;color:var(--ink-2);font-variant-numeric:tabular-nums}
.art-main{grid-column:4/span 8;min-width:0}
.art-main h1{font-size:clamp(2rem,1.2rem + 2.8vw,3.8rem);letter-spacing:-.045em;line-height:1.16}
.art-main .body{margin-top:clamp(32px,4vw,56px);max-width:40em;display:flex;flex-direction:column;gap:24px;font-size:1.0625rem;line-height:2;color:var(--ink-2)}
.art-main .body [style]{color:inherit!important;background:none!important}
.art-main .body p:empty,.art-main .body p:has(> br:only-child){display:none}
.art-main .body > p:first-of-type{font-size:1.25rem;line-height:1.85;color:var(--ink)}
.art-main .body img{border-radius:6px;height:auto}
.art-main .body a{color:var(--blue)}
.art-main .body h2,.art-main .body h3{color:var(--ink);font-size:1.375rem;margin-top:12px}
.art-pn{display:grid;grid-template-columns:1fr 1fr;margin-top:clamp(64px,8vw,112px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.art-pn a{display:flex;flex-direction:column;gap:10px;padding:28px 0;text-decoration:none;min-width:0}
.art-pn>:nth-child(2){border-left:1px solid var(--line);padding-left:28px;text-align:right;align-items:flex-end}
.art-pn small{color:var(--ink-3);font-size:.8125rem}
.art-pn .t{font-size:clamp(1.1rem,1rem + .6vw,1.5rem);letter-spacing:-.02em;line-height:1.4}
.art-pn a:hover .t{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.art-more{margin-top:clamp(72px,9vw,128px)}
@media (max-width:860px){.art-meta{grid-column:1/-1;position:static;flex-direction:row;justify-content:space-between;flex-wrap:wrap;gap:12px 32px}.art-main{grid-column:1/-1}.art-pn{grid-template-columns:1fr}.art-pn>:nth-child(2){border-left:0;border-top:1px solid var(--line);padding-left:0;text-align:left;align-items:flex-start}}

/* ── 联系页 ── */
.ct{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px;row-gap:48px}
.ct form,.ct .ok{grid-column:1/span 7}
.ct aside{grid-column:9/span 4;display:flex;flex-direction:column;gap:26px}
.ct aside div{display:flex;flex-direction:column;gap:4px;padding-top:14px;border-top:1px solid var(--line)}
.ct aside b{font-weight:400;font-size:.8125rem;color:var(--ink-3)}
.ct aside span{font-size:1.0625rem}
@media (max-width:860px){.ct form,.ct .ok,.ct aside{grid-column:1/-1}}
.ct form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
fieldset{grid-column:1/-1;border:0;margin:0 0 8px;padding:0;min-width:0}
legend,.f label{font-size:.8125rem;color:var(--ink-3);padding:0;margin-bottom:10px}
.f{display:flex;flex-direction:column;min-width:0}
.f.full{grid-column:1/-1}
.f label{margin-bottom:8px}
.f input,.f textarea{font:inherit;font-size:1rem;padding:14px 0;border:0;border-bottom:1px solid var(--line-2);border-radius:0;background:transparent;color:var(--ink);width:100%;transition:border-color .25s}
.f input:focus,.f textarea:focus{outline:none;border-bottom-color:var(--blue)}
.f textarea{min-height:120px;resize:vertical}
.tp{display:flex;flex-wrap:wrap;gap:8px}
.tp input{position:absolute;opacity:0;pointer-events:none}
.tp label{font-size:.9375rem;color:var(--ink);padding:8px 16px;border-radius:99px;box-shadow:inset 0 0 0 1px var(--line-2);cursor:pointer;margin:0;transition:background .25s,color .25s,box-shadow .25s}
.tp input:checked+label{background:var(--btn);color:var(--btn-fg);box-shadow:none}
.tp input:focus-visible+label{outline:2px solid var(--blue);outline-offset:2px}
.submit{grid-column:1/-1;display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:8px}
.submit .note{font-size:.8125rem;color:var(--ink-3)}
.msg{font-size:.875rem;color:var(--violet)}
.ok{padding-top:8px;display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.ok h3{font-size:2rem}
.ok p{color:var(--ink-2)}
.cpbtn{border:0;background:none;padding:0;font-size:.8125rem;cursor:pointer;color:var(--ink-3);text-decoration:underline;text-underline-offset:3px;align-self:flex-start}
@media (max-width:560px){.ct form{grid-template-columns:1fr}}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none!important;transition:none!important}}