/* ============================================================
   Coolpire 官网设计系统
   色彩:深海军 / 品牌藏青 / 品牌蓝 / 冷却液青 / 纸白
   ============================================================ */
:root{
  --ink:#0B1D33;          /* 深海军(深色区背景) */
  --navy:#1F3864;         /* 品牌藏青 */
  --blue:#2E74B5;         /* 品牌蓝 */
  --coolant:#2FD4C4;      /* 冷却液青(点睛) */
  --coolant-dim:#1C8F86;
  --paper:#F6F8FB;        /* 纸白 */
  --line:#DEE6F0;
  --text:#253142;
  --muted:#5B6B82;
  --white:#FFFFFF;
  --mono:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  --sans:"Microsoft YaHei","微软雅黑","PingFang SC","Noto Sans SC",system-ui,sans-serif;
  --radius:10px;
  --maxw:1180px;
  --shadow:0 10px 30px rgba(11,29,51,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--white);line-height:1.75;font-size:16px}
img,svg,video{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--navy)}
:focus-visible{outline:3px solid var(--coolant);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(11,29,51,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:19px;letter-spacing:.5px}
.brand:hover{color:#fff}
.brand .mark{height:30px;width:auto;flex:none}
.brand small{display:block;font-weight:400;font-size:11px;color:#9FB4CE;letter-spacing:2px;line-height:1.1}
nav.mainnav{display:flex;gap:6px;align-items:center}
nav.mainnav a{color:#C9D6E8;font-size:14.5px;padding:8px 13px;border-radius:6px}
nav.mainnav a:hover{color:#fff;background:rgba(255,255,255,.08)}
nav.mainnav a.active{color:var(--coolant)}
nav.mainnav a.cta{background:var(--coolant);color:var(--ink);font-weight:700;margin-left:8px}
nav.mainnav a.cta:hover{background:#4AE3D4}
.navtoggle{display:none;background:none;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:6px;padding:6px 10px;font-size:18px;cursor:pointer}

/* ---------- Hero(首页) ---------- */
.hero{background:radial-gradient(1100px 520px at 78% 18%,rgba(46,116,181,.35),transparent 60%),linear-gradient(160deg,#0B1D33 0%,#12294A 55%,#0B1D33 100%);color:#fff;overflow:hidden;position:relative}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:84px;padding-bottom:84px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:3px;color:var(--coolant);border:1px solid rgba(47,212,196,.4);padding:5px 14px;border-radius:999px;margin-bottom:22px}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--coolant);animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.28;font-weight:800;letter-spacing:.5px}
.hero h1 em{font-style:normal;color:var(--coolant)}
.hero .sub{margin-top:20px;color:#B8C8DD;font-size:17px;max-width:34em}
.hero .btns{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:8px;font-weight:700;font-size:15.5px;transition:transform .15s,box-shadow .15s;cursor:pointer;border:none}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--coolant);color:var(--ink)}
.btn-primary:hover{background:#4AE3D4;color:var(--ink);box-shadow:0 8px 24px rgba(47,212,196,.35)}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--blue);color:#fff}

/* Hero 右侧:歧管动画 + 读数 */
.rig{position:relative}
.rig .readouts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:16px}
.readout{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:10px 14px}
.readout .k{font-size:11.5px;letter-spacing:1.5px;color:#8FA6C4}
.readout .v{font-family:var(--mono);font-size:20px;color:var(--coolant);font-weight:600}
.readout .v small{font-size:12px;color:#8FA6C4;font-weight:400;margin-left:4px}
.readout .ok{float:right;font-size:11px;color:var(--coolant);border:1px solid rgba(47,212,196,.5);border-radius:4px;padding:0 6px;margin-top:4px}

/* 流体动画 */
.flow{stroke-dasharray:10 14;animation:flow 1.1s linear infinite}
.flow.slow{animation-duration:1.8s}
.flow.rev{animation-direction:reverse}
@keyframes flow{to{stroke-dashoffset:-24}}
.glow{animation:glowp 2.6s ease-in-out infinite}
@keyframes glowp{0%,100%{opacity:.55}50%{opacity:1}}
@media (prefers-reduced-motion:reduce){
  .flow,.glow,.eyebrow::before{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- 通用区块 ---------- */
section.block{padding:78px 0}
section.block.alt{background:var(--paper)}
section.block.dark{background:var(--ink);color:#fff}
.kicker{font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:700;text-transform:uppercase}
.dark .kicker{color:var(--coolant)}
h2.title{font-size:clamp(24px,3vw,34px);color:var(--navy);margin:10px 0 14px;font-weight:800;line-height:1.35}
.dark h2.title{color:#fff}
.lede{color:var(--muted);max-width:46em;font-size:16.5px}
.dark .lede{color:#AABBD3}

/* 指标带 */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:-46px;position:relative;z-index:2;box-shadow:var(--shadow)}
.metric{background:#fff;padding:26px 24px;text-align:center}
.metric .n{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--navy)}
.metric .n span{color:var(--coolant-dim);font-size:18px}
.metric .l{font-size:14px;color:var(--muted);margin-top:4px}

/* 卡片 */
.grid{display:grid;gap:22px;margin-top:38px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card h3{color:var(--navy);font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.card .ic{width:44px;height:44px;border-radius:9px;background:linear-gradient(135deg,var(--navy),var(--blue));display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ic svg{width:24px;height:24px;stroke:var(--coolant);fill:none;stroke-width:1.8}
.dark .card{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.12)}
.dark .card h3{color:#fff}
.dark .card p{color:#AABBD3}

/* 产品卡 */
.prod{display:grid;grid-template-columns:200px 1fr;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:box-shadow .18s,transform .18s}
.prod:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.prod .thumb{background:linear-gradient(160deg,var(--ink),#173156);border-radius:8px;padding:14px;height:170px;display:flex;align-items:center;justify-content:center}
.prod h3{color:var(--navy);font-size:21px}
.prod h3 span{font-family:var(--mono);color:var(--coolant-dim);font-size:15px;display:block;letter-spacing:1px}
.prod p{color:var(--muted);font-size:14.5px;margin:8px 0 14px}
.taglist{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tag{font-size:12.5px;color:var(--blue);background:#EAF2FA;border-radius:5px;padding:3px 10px}
.more{font-weight:700;font-size:14.5px}
.more::after{content:" →"}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:38px;counter-reset:step}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;position:relative}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--mono);font-size:13px;color:var(--coolant-dim);font-weight:700;letter-spacing:1px}
.step h4{color:var(--navy);font-size:16px;margin:6px 0 6px}
.step p{font-size:13.5px;color:var(--muted)}
.dark .step{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.12)}
.dark .step h4{color:#fff}
.dark .step p{color:#AABBD3}
.dark .step::before{color:var(--coolant)}

/* 参数表 */
table.spec{width:100%;border-collapse:collapse;margin-top:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.spec th,table.spec td{padding:13px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
table.spec th{background:var(--navy);color:#fff;font-weight:700;width:220px}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:none}
table.spec td{color:var(--text)}
.footnote{font-size:12.5px;color:var(--muted);margin-top:10px}

/* PLC 报告样机 */
.plc{background:linear-gradient(160deg,#0B1D33,#14304F);border-radius:14px;padding:26px;color:#fff;box-shadow:var(--shadow);max-width:560px}
.plc .bar{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.15);padding-bottom:12px;margin-bottom:16px}
.plc .bar b{font-size:15px;letter-spacing:1px}
.plc .bar span{font-family:var(--mono);font-size:12px;color:#8FA6C4}
.plc table{width:100%;border-collapse:collapse}
.plc td{padding:9px 4px;font-size:13.5px;border-bottom:1px dashed rgba(255,255,255,.12)}
.plc td:first-child{color:#9FB4CE}
.plc td:nth-child(2){font-family:var(--mono);text-align:right}
.plc td:last-child{text-align:right;width:64px}
.pass{color:var(--coolant);font-weight:700;font-size:12.5px;border:1px solid rgba(47,212,196,.5);border-radius:4px;padding:1px 8px}
.plc .stamp{margin-top:16px;display:flex;justify-content:space-between;align-items:center}
.plc .stamp .seal{border:2px solid var(--coolant);color:var(--coolant);font-weight:800;letter-spacing:4px;padding:6px 16px;border-radius:6px;transform:rotate(-4deg);font-size:17px}
.plc .stamp small{color:#8FA6C4;font-family:var(--mono);font-size:11.5px}

/* 下载区 */
.dl{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin-top:14px}
.dl b{color:var(--navy);font-size:15.5px;display:block}
.dl small{color:var(--muted);font-size:13px}
.dl .btn{padding:9px 18px;font-size:14px}

/* 兼容性表 */
table.compat{width:100%;border-collapse:collapse;margin-top:26px;background:#fff;border:1px solid var(--line)}
table.compat th,table.compat td{border:1px solid var(--line);padding:11px 14px;font-size:14px;text-align:center}
table.compat th{background:var(--navy);color:#fff}
table.compat td:first-child{text-align:left;font-weight:700;color:var(--navy)}
.c-ok{color:var(--coolant-dim);font-weight:700}
.c-cond{color:#B07A1E;font-weight:700}

/* FAQ */
details.faq{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin-top:12px}
details.faq summary{cursor:pointer;font-weight:700;color:var(--navy);font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center}
details.faq summary::after{content:"+";font-size:20px;color:var(--blue)}
details.faq[open] summary::after{content:"−"}
details.faq p{margin-top:10px;color:var(--muted);font-size:14.5px}

/* 时间线 */
.timeline{margin-top:34px;border-left:2px solid var(--line);padding-left:28px;display:grid;gap:22px}
.tl{position:relative}
.tl::before{content:"";position:absolute;left:-35px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--coolant);border:3px solid #fff;box-shadow:0 0 0 2px var(--coolant)}
.tl b{color:var(--navy)}
.tl small{font-family:var(--mono);color:var(--coolant-dim);display:block;font-size:12.5px;letter-spacing:1px}
.tl p{color:var(--muted);font-size:14.5px}

/* 认证路线 */
.cert{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-top:14px}
.cert .st{flex:none;font-size:12px;font-weight:700;border-radius:5px;padding:3px 10px;margin-top:3px}
.st.doing{background:#E6F7F5;color:var(--coolant-dim)}
.st.plan{background:#EAF2FA;color:var(--blue)}
.cert b{color:var(--navy)}
.cert p{color:var(--muted);font-size:14px}

/* CTA 带 */
.ctaband{background:linear-gradient(120deg,var(--navy),var(--blue));border-radius:16px;color:#fff;padding:48px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.ctaband h2{font-size:26px;font-weight:800}
.ctaband p{color:#D5E3F3;margin-top:6px;font-size:15px}

/* 页脚 */
footer{background:var(--ink);color:#8FA6C4;padding:56px 0 30px;font-size:14px}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:36px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer a{color:#8FA6C4;display:block;margin-bottom:8px}
footer a:hover{color:var(--coolant)}
footer .legal{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#5F7391}

/* 内页 hero */
.subhero{background:linear-gradient(150deg,#0B1D33,#1A3A63);color:#fff;padding:66px 0}
.subhero .crumb{font-size:13px;color:#8FA6C4;margin-bottom:14px}
.subhero .crumb a{color:#8FA6C4}
.subhero h1{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.subhero h1 span{font-family:var(--mono);color:var(--coolant);font-size:.55em;display:block;letter-spacing:2px;margin-bottom:8px}
.subhero p{color:#B8C8DD;margin-top:14px;max-width:44em;font-size:16px}

/* 场景条 */
.scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px}
.scene{border-radius:var(--radius);padding:26px;background:linear-gradient(160deg,#12294A,#1F3864);color:#fff}
.scene h3{font-size:17px;color:#fff;margin-bottom:8px}
.scene h3::before{content:"▸ ";color:var(--coolant)}
.scene p{color:#AABBD3;font-size:14px}

/* 视频位 */
.videobox{border-radius:16px;overflow:hidden;box-shadow:var(--shadow);background:#000;margin-top:38px}
.videobox video{width:100%}

/* 响应式 */
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;padding-top:56px;padding-bottom:56px}
  .metrics{grid-template-columns:repeat(2,1fr);margin-top:-30px}
  .grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scenes{grid-template-columns:1fr}
  footer .cols{grid-template-columns:1fr 1fr}
  .prod{grid-template-columns:1fr}
  nav.mainnav{position:fixed;inset:64px 0 auto 0;background:var(--ink);flex-direction:column;align-items:stretch;padding:14px 20px 22px;display:none;border-bottom:1px solid rgba(255,255,255,.1)}
  nav.mainnav.open{display:flex}
  nav.mainnav a{padding:12px}
  .navtoggle{display:block}
}
@media (max-width:600px){
  .grid.c2,.grid.c3,.grid.c4,.steps,.metrics{grid-template-columns:1fr}
  footer .cols{grid-template-columns:1fr}
  table.spec th{width:130px}
  .ctaband{padding:32px}
}

/* 首屏设备展台 */
.devstage{background:linear-gradient(178deg,#FAFBFC,#E8EAEF);border-radius:16px;
  box-shadow:0 22px 50px rgba(0,0,0,.45),0 0 0 1px rgba(47,212,196,.28),0 0 34px rgba(47,212,196,.12);
  display:flex;justify-content:center;padding:14px 10px}
.devstage img{height:330px;width:auto}
/* 三个关键时刻 */
.moment{background:#fff;border:1.5px solid rgba(46,116,181,.35);border-radius:var(--radius);
  padding:28px 24px;text-align:center;transition:transform .18s,box-shadow .18s}
.moment:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.moment .mw{font-size:30px;font-weight:800;color:var(--coolant-dim);letter-spacing:6px;margin-right:-6px}
.moment .mt{margin-top:12px;font-size:15.5px;font-weight:700;color:var(--navy);
  border-bottom:1px solid var(--line);display:inline-block;padding-bottom:8px}
.moment p{margin-top:12px;font-size:13.5px;color:var(--muted);line-height:1.85;text-align:left}
@media (max-width:600px){.devstage img{height:250px}}

/* 应用场景照片墙 */
.photogrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px}
.photogrid figure{border-radius:var(--radius);overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:0 6px 20px rgba(11,29,51,.08);
  transition:transform .18s,box-shadow .18s}
.photogrid figure:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.photogrid img{width:100%;height:190px;object-fit:cover;display:block}
.photogrid figcaption{padding:16px 18px;font-size:13.5px;color:var(--muted);line-height:1.8}
.photogrid figcaption b{display:block;color:var(--navy);font-size:15px;margin-bottom:4px}
@media (max-width:960px){.photogrid{grid-template-columns:1fr}}