/* ============================================================
   云核智能官网 v2 —— 暗色电影编辑风
   bg #0b0a09 / ink #ece7dd / muted #97917f / amber #e09a3c
   衬线大标题 + mono 眉标 + 全页噪点 + 滚动编排
   ============================================================ */
:root{
  --bg:#0b0a09; --ink:#ece7dd; --muted:#97917f; --amber:#e09a3c;
  --line:rgba(236,231,221,.14); --paper2:#fffdf9; --white:#fff;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --pad:clamp(18px,4.5vw,48px);
  --maxw:1400px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block}
::selection{background:rgba(224,154,60,.35)}
.serif{font-family:var(--serif)}
.mono{font-family:var(--mono)}

/* 全页噪点 */
.noise{position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.05;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* 入场编排 */
@keyframes rise{from{opacity:0;transform:translateY(42px)}to{opacity:1;transform:none}}
.rise{opacity:0;animation:rise 1.1s cubic-bezier(.22,1,.36,1) forwards;animation-delay:var(--d,0s)}
@keyframes framein{from{opacity:0;transform:translateY(24px) scale(1.03)}to{opacity:1;transform:none}}
.hero-frame{opacity:0;animation:framein 1.4s cubic-bezier(.22,1,.36,1) .5s forwards}

/* 滚动浮现 */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .9s cubic-bezier(.22,1,.36,1),transform .9s cubic-bezier(.22,1,.36,1);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* 下划线链接 */
.ul-link{position:relative}
.ul-link::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .45s cubic-bezier(.22,1,.36,1)}
.ul-link:hover::after{transform:scaleX(1);transform-origin:left}

/* 按钮 */
.btn-solid{display:inline-flex;align-items:center;gap:12px;background:var(--ink);color:var(--bg);padding:16px 32px;font-size:14px;font-weight:500;transition:transform .35s cubic-bezier(.22,1,.36,1),background .35s}
.btn-solid:hover{transform:translateY(-2px);background:#fff}
.btn-solid .arr{transition:transform .35s cubic-bezier(.22,1,.36,1)}
.btn-solid:hover .arr{transform:translateX(4px)}

/* 进度条 */
.progress{position:fixed;top:0;left:0;height:2px;background:var(--amber);z-index:99;width:0%}

/* 导航 */
.navv{position:fixed;top:0;left:0;right:0;z-index:95;transition:background .35s,border-color .35s,backdrop-filter .35s;border-bottom:1px solid transparent}
.navv.scrolled{background:rgba(11,10,9,.82);backdrop-filter:blur(12px);border-bottom-color:var(--line)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);height:72px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--serif);font-weight:900;letter-spacing:.18em;font-size:17px}
.brand img{width:24px;height:24px}
.nav-links{display:flex;gap:34px;font-size:14px}
.nav-links a{color:var(--muted);transition:color .3s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{border:1px solid var(--line);padding:9px 20px;font-size:13px;color:var(--ink);transition:.3s}
.nav-cta:hover{border-color:var(--amber);color:var(--amber)}
.burger{display:none;background:none;border:0;color:var(--ink);cursor:pointer;padding:6px}
.mob{display:none}
@media (max-width:860px){
  .nav-links,.nav-cta{display:none}
  .burger{display:block}
  .mob.open{display:block;position:fixed;inset:72px 0 0 0;background:rgba(11,10,9,.97);z-index:94;padding:40px var(--pad)}
  .mob.open a{display:block;font-family:var(--serif);font-size:28px;padding:16px 0;border-bottom:1px solid var(--line);color:var(--ink)}
}

/* hero */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;padding:140px var(--pad) 0;max-width:var(--maxw);margin:0 auto}
.eyebrow{display:flex;align-items:center;gap:14px;font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--amber)}
.eyebrow .rule{height:1px;width:44px;background:var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,4vw,64px);align-items:end;width:100%}
.disp{font-family:var(--serif);font-weight:900;font-size:clamp(2.6rem,5.2vw,4.6rem);line-height:1.14;letter-spacing:.01em;margin:0}
.disp em{font-style:normal;color:var(--amber)}
.hero-sub{color:var(--muted);font-size:15.5px;line-height:1.8;margin:26px 0 0;max-width:44ch}
.hero-acts{display:flex;flex-wrap:wrap;align-items:center;gap:30px;margin-top:40px}
.hero-acts .lnk{color:var(--muted);font-size:14px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:0 24px;margin-top:64px;padding-top:36px;border-top:1px solid var(--line)}
.fact b{display:block;font-family:var(--serif);font-weight:900;font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.16;font-variant-numeric:tabular-nums;white-space:nowrap}
.fact b i{font-style:normal;color:var(--amber);margin-left:1px}
.fact > span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
.hero-right{padding-bottom:64px}
.hero-frame{position:relative;overflow:hidden;border-radius:2px;border:1px solid var(--line)}
.hero-frame img{width:100%;height:clamp(320px,36vw,680px);object-fit:cover;will-change:transform}
.hf-grad{position:absolute;inset:0;background:linear-gradient(to top,rgba(11,10,9,.7),transparent 60%);pointer-events:none}
.hf-tag{position:absolute;top:16px;left:16px;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:rgba(236,231,221,.75)}
.hf-tag2{position:absolute;bottom:16px;right:16px;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--amber)}
.hf-cap{font-family:var(--mono);text-align:right;font-size:10px;letter-spacing:.2em;color:rgba(151,145,127,.6);margin-top:14px}
.scroll-hint{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:none;flex-direction:column;align-items:center;gap:8px;color:var(--muted);animation:shint 2.2s ease-in-out infinite}
@keyframes shint{0%,100%{transform:translateX(-50%) translateY(0);opacity:.5}50%{transform:translateX(-50%) translateY(8px);opacity:1}}
@media (min-width:1024px){.scroll-hint{display:flex}}

/* marquee */
.marquee{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.marquee-track{display:flex;width:max-content;animation:mq 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes mq{to{transform:translateX(-50%)}}
.brand-cell{font-family:var(--serif);font-size:24px;margin:0 40px;animation:breathe 6s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:.45}50%{opacity:.9}}
.mq-note{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--amber);margin:0 64px 0 24px;align-self:center}
.mq-note2{font-family:var(--mono);font-size:11px;letter-spacing:.25em;color:var(--muted);margin:0 64px;align-self:center}

/* 通用区块 */
.sec{padding:clamp(72px,10vw,140px) var(--pad);max-width:var(--maxw);margin:0 auto}
.sec{border-top:1px solid var(--line)}
.sec:not(.bordered){border-top:0}
.sec-head{margin-bottom:clamp(40px,6vw,72px)}
.sec-title{font-family:var(--serif);font-weight:900;font-size:clamp(1.9rem,3.6vw,3.1rem);line-height:1.25;margin:22px 0 0}

/* 服务行 */
.slist{border-top:1px solid var(--line)}
.srow{display:grid;grid-template-columns:80px 1fr 2fr auto;gap:16px 40px;align-items:center;padding:34px 8px;border-bottom:1px solid var(--line);transition:background .4s}
.srow:hover{background:rgba(236,231,221,.035)}
.srow .no{font-family:var(--mono);font-size:14px;color:var(--muted);transition:color .35s}
.srow:hover .no{color:var(--amber)}
.srow .nm{font-family:var(--serif);font-weight:600;font-size:clamp(1.4rem,2.2vw,1.9rem);margin:0;transition:transform .45s cubic-bezier(.22,1,.36,1),color .35s}
.srow:hover .nm{transform:translateX(14px);color:#fff}
.srow .dg{color:var(--muted);font-size:14px;line-height:1.7;margin:0}
.srow .ar{color:var(--amber);opacity:0;transform:translateX(-8px);transition:transform .45s cubic-bezier(.22,1,.36,1),opacity .35s;justify-self:end}
.srow:hover .ar{opacity:1;transform:none}
@media (max-width:860px){
  .srow{grid-template-columns:auto 1fr auto;gap:8px 18px;padding:26px 2px}
  .srow .dg{grid-column:2/4}
}

/* 浮动图（桌面 hover 跟随） */
.floatimg{position:fixed;top:0;left:0;width:300px;height:200px;object-fit:cover;border-radius:2px;border:1px solid var(--line);pointer-events:none;z-index:80;opacity:0;transition:opacity .3s;will-change:transform}
@media (max-width:1023px){.floatimg{display:none}}

/* 全幅算力底座 */
.compute{position:relative;min-height:70vh;overflow:hidden;display:flex;align-items:flex-end}
.compute .bgimg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;animation:ken 24s ease-in-out infinite alternate}
@keyframes ken{from{transform:scale(1)}to{transform:scale(1.08)}}
.compute .ov1{position:absolute;inset:0;background:rgba(11,10,9,.55)}
.compute .ov2{position:absolute;inset:0;background:linear-gradient(to bottom,var(--bg),transparent 40%,var(--bg))}
.compute .cin{position:relative;width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad) clamp(48px,7vw,88px)}
.compute .ct{font-family:var(--serif);font-weight:900;font-size:clamp(1.7rem,3.6vw,3.2rem);line-height:1.35;max-width:56ch;margin:22px 0 0}
.compute .cgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:40px;padding-top:32px;border-top:1px solid rgba(236,231,221,.15)}
.compute .cgrid p{margin:0}
.compute .ck{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted)}
.compute .cv{font-size:14px;margin-top:8px !important}
@media (max-width:860px){.compute .cgrid{grid-template-columns:1fr}}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:clamp(48px,6vw,80px);align-items:stretch}
@media (max-width:1023px){.flow{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.flow{grid-template-columns:1fr}}
.step .step-no{font-family:var(--serif);font-weight:900;line-height:1;font-size:clamp(4.5rem,8vw,7rem);color:transparent;-webkit-text-stroke:1px rgba(236,231,221,.28);transition:-webkit-text-stroke-color .5s;margin:0}
.step:hover .step-no{-webkit-text-stroke-color:var(--amber)}
.step h3{font-family:var(--serif);font-size:20px;font-weight:600;margin:22px 0 0}
.step p{color:var(--muted);font-size:14px;line-height:1.75;margin:12px 0 0}
.step .sline{height:1px;background:var(--line);margin-top:auto}
.flow-intro{max-width:300px;color:var(--muted);font-size:14px;line-height:1.75;margin:0}
.flow-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:32px}

/* caps 网格 */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cap{background:var(--bg);padding:26px 22px;transition:background .3s}
.cap:hover{background:rgba(236,231,221,.04)}
.cap i{font-family:var(--mono);font-style:normal;font-size:11px;color:var(--amber)}
.cap b{display:block;margin-top:10px;font-weight:600;font-size:15px}
@media (max-width:1023px){.caps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.caps{grid-template-columns:1fr}}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1.6fr;gap:clamp(32px,5vw,64px)}
@media (max-width:1023px){.faq-grid{grid-template-columns:1fr}}
.faq-item{border-bottom:1px solid var(--line);transition:border-color .4s}
.faq-item.open{border-color:rgba(224,154,60,.4)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;background:none;border:0;color:inherit;text-align:left;padding:26px 0;cursor:pointer}
.faq-q span{font-family:var(--serif);font-size:18px;font-weight:600;color:rgba(236,231,221,.9)}
.faq-chevron{transition:transform .35s ease,color .35s;color:var(--muted);flex:0 0 auto}
.faq-item.open .faq-chevron{transform:rotate(45deg);color:var(--amber)}
.faq-body{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .4s ease,opacity .4s ease}
.faq-item.open .faq-body{grid-template-rows:1fr;opacity:1;padding-bottom:26px}
.faq-body p{overflow:hidden;color:var(--muted);font-size:14px;line-height:1.9;margin:0}

/* CTA */
.cta{position:relative;overflow:hidden;border-top:1px solid var(--line);text-align:center}
.cta .bgimg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6}
.cta .ov{position:absolute;inset:0;background:linear-gradient(to bottom,var(--bg),rgba(11,10,9,.4) 50%,var(--bg))}
.cta .cin{position:relative;max-width:760px;margin:0 auto;padding:clamp(96px,14vw,180px) var(--pad)}
.cta .dis{font-family:var(--serif);font-weight:900;font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.2;margin:28px 0 0}
.cta .csub{color:var(--muted);font-size:14px;line-height:1.9;margin:28px 0 0}
.cta .acts{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:30px;margin-top:48px}

/* footer */
.foot{border-top:1px solid var(--line)}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:clamp(48px,7vw,72px) var(--pad) 40px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot h4{font-family:var(--mono);font-size:10px;letter-spacing:.25em;color:var(--muted);font-weight:500;margin:0 0 18px;text-transform:uppercase}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin-bottom:12px}
.foot li a,.foot li span{color:var(--muted);font-size:14px;transition:color .3s}
.foot li a:hover{color:var(--ink)}
.foot-brand p{color:var(--muted);font-size:14px;line-height:1.8;margin:18px 0 0}
.foot-brand .brand{font-size:18px}
.foot-bar{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:56px;padding-top:28px;font-size:12px;color:rgba(151,145,127,.7)}
.foot-bar a{transition:color .3s}
.foot-bar a:hover{color:var(--ink)}
.foot-bar img{display:inline;vertical-align:-2px;margin-right:4px}

/* 浮动客服位 */
@media (prefers-reduced-motion:reduce){*{animation:none !important;transition:none !important}.reveal{opacity:1;transform:none}.rise{opacity:1}}


/* ===== 预约咨询留资弹窗 ===== */
.lm{position:fixed;inset:0;z-index:120;background:rgba(11,10,9,.8);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;visibility:hidden;transition:opacity .35s,visibility .35s}
.lm.open{opacity:1;visibility:visible}
.lm-panel{position:relative;width:100%;max-width:460px;background:#151310;border:1px solid var(--line);border-radius:2px;padding:clamp(26px,4vw,42px);transform:translateY(18px);transition:transform .45s cubic-bezier(.22,1,.36,1);max-height:88vh;overflow:auto}
.lm.open .lm-panel{transform:none}
.lm-close{position:absolute;top:12px;right:12px;background:none;border:0;color:var(--muted);cursor:pointer;padding:8px;line-height:0;transition:color .3s}
.lm-close:hover{color:var(--ink)}
.lm-eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--amber);margin:0}
.lm-title{font-family:var(--serif);font-weight:900;font-size:clamp(1.45rem,3vw,1.85rem);margin:14px 0 6px;line-height:1.3}
.lm-sub{color:var(--muted);font-size:13px;margin:0 0 28px}
.lm-f{display:block;margin-bottom:22px}
.lm-f>span{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted);margin-bottom:7px}
.lm-f>span i{font-style:normal;color:var(--amber);margin-left:6px;font-size:9px}
.lm-f input,.lm-f textarea{width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);color:var(--ink);font-family:var(--sans);font-size:15px;padding:8px 0;outline:none;transition:border-color .3s;resize:vertical;line-height:1.7}
.lm-f input:focus,.lm-f textarea:focus{border-bottom-color:var(--amber)}
.lm-f ::placeholder{color:rgba(151,145,127,.45)}
.lm-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.lm-err{display:none;color:#e0736c;font-size:13px;margin:0 0 16px}
.lm-submit{width:100%;justify-content:center;margin-top:6px}
.lm-note{color:rgba(151,145,127,.65);font-size:11px;text-align:center;margin:16px 0 0}
.lm-ok{display:none;text-align:center;padding:24px 0 8px}
.lm-ok .serif{font-size:22px;font-weight:900;margin:0 0 10px;color:var(--ink)}
.lm-ok>p{color:var(--muted);font-size:14px;margin:0}
.lm-back{margin-top:26px;background:none;border:1px solid var(--line);color:var(--muted);padding:10px 26px;font-size:13px;cursor:pointer;transition:.3s}
.lm-back:hover{color:var(--ink);border-color:var(--ink)}

.step{display:flex;flex-direction:column}
.step .sline{min-height:1px}