/* 字体为本站用字子集，改文案后运行 deploy.sh 会重新生成 */
@font-face{font-family:"Noto Sans SC";src:url(fonts/noto-sc.woff2) format("woff2");font-weight:400 600;font-display:swap}
@font-face{font-family:"Outfit";src:url(fonts/outfit.woff2) format("woff2");font-weight:400 600;font-display:swap}
:root{
  --navy:#0B1D3A; --navy-deep:#081630; --navy-raise:#10264A; --navy-line:#1C3054;
  --gold:#C9A66B; --gold-soft:#E2C994;
  --navy-hi:#13294D; --navy-low:#081733; --alt-top:#0A1A36; --alt-bottom:#06122A;
  --navy-hover:#0E2346; --navy-hover-alt:#0B1C3A;
  --line:#2A4270;          /* 装饰性描边 */
  --line-strong:#5873A3;   /* 可交互元素描边，深蓝底上对比度 ≥3:1 */
  --ink:#E9EDF4; --muted:#9AA3B2; --placeholder:#7F8899;
  --radius:4px;
  --sans:"Outfit","Noto Sans SC","PingFang SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--navy);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
img{display:block;max-width:100%}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
section{padding:112px 0}
.alt{background:var(--navy-deep)}
h2{font-size:clamp(26px,2.6vw,34px);font-weight:500;line-height:1.35;letter-spacing:.04em}
h3{font-weight:500;line-height:1.4}
.lead{color:var(--muted);max-width:40em;margin-top:18px}
/* 区块标题：中文标题 + 英文副标 + 金色短线，默认居中 */
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .en{font-size:12px;letter-spacing:.32em;color:var(--muted);margin-top:8px;text-transform:uppercase}
.sec-head .en::after{content:"";display:block;width:36px;height:2px;background:var(--gold);margin:18px auto 0}
.sec-head .lead{margin:20px auto 0;max-width:46em}
.sec-head.left{text-align:left}
.sec-head.left .en::after{margin-left:0}
.sec-head.left .lead{margin-left:0}
.muted{color:var(--muted)}
/* 待填占位：上线前全部替换 */
.todo{background:none;color:var(--gold-soft);border-bottom:1px dashed var(--gold);padding:0 2px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:10px;height:48px;padding:0 26px;border-radius:var(--radius);font:inherit;font-size:15px;font-weight:500;white-space:nowrap;cursor:pointer;border:0;transition:transform .3s cubic-bezier(.16,1,.3,1),background .3s,border-color .3s}
.btn:active{transform:translateY(1px)}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{background:var(--gold-soft)}
.btn-line{border:1px solid var(--line-strong);color:var(--ink);background:none}
.btn-line:hover{border-color:var(--gold)}
.link{color:var(--gold);font-size:15px;display:inline-flex;gap:8px;align-items:center}
.link::after{content:"→";transition:transform .3s}
.link:hover::after{transform:translateX(4px)}

/* 导航 */
.nav{position:fixed;inset:0 0 auto;z-index:10;height:72px;background:rgba(11,29,58,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(28,48,84,.6)}
.nav>.wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{width:34px;height:34px}
.brand b{display:block;font-weight:500;font-size:17px;letter-spacing:.06em;line-height:1.2}
.brand small{display:block;font-size:11px;letter-spacing:1.04em;margin-right:-1.04em;color:var(--muted)}
.nav ul{display:flex;gap:34px;list-style:none;font-size:15px;color:var(--muted)}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--ink)}
.nav ul a[aria-current]{box-shadow:0 1px 0 var(--gold)}
.nav .btn{height:40px;padding:0 20px}
.menu{display:none}

/* 子页面头图 */
.page-hero{padding:168px 0 140px;position:relative;overflow:hidden;border-bottom:1px solid var(--navy-line)}
.page-hero::after{content:"";position:absolute;right:4%;bottom:-40px;width:340px;height:340px;background:url(mark.svg) no-repeat center/contain;opacity:.06;pointer-events:none}
.crumb{font-size:14px;color:var(--muted);margin-bottom:24px}
.crumb a:hover{color:var(--ink)}
.page-hero h1{font-size:clamp(34px,3.6vw,48px);font-weight:500;line-height:1.3;letter-spacing:.06em}
.page-hero .lead{font-size:17px;max-width:44em}
.page-hero .ctas{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap}

/* 通用格子：1px 分隔线的网格 */
.tiles{display:grid;gap:1px;background:var(--navy-line);border:1px solid var(--navy-line)}
.tiles>*{background:var(--navy);padding:36px}
.alt .tiles>*{background:var(--navy-deep)}
.tiles.c2{grid-template-columns:repeat(2,1fr)}
.tiles.c3{grid-template-columns:repeat(3,1fr)}
.tiles.c4{grid-template-columns:repeat(4,1fr)}
.tiles h3{font-size:19px;margin-bottom:12px;padding-top:18px;position:relative}
.tiles h3::before{content:"";position:absolute;left:0;top:0;width:24px;height:2px;background:var(--gold)}
.tiles p{color:var(--muted);font-size:15px}
.tiles .feat{background:linear-gradient(160deg,var(--navy-hi),var(--navy-deep) 75%)}
.tiles .ticks{margin-top:20px;gap:10px;font-size:15px}
.tiles .link{margin-top:24px}

/* 左文右图 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.photo{aspect-ratio:4/3;border:1px dashed var(--line);border-radius:var(--radius);display:grid;place-items:center;text-align:center;color:var(--muted);font-size:14px;padding:24px;background:repeating-linear-gradient(135deg,transparent 0 14px,rgba(28,48,84,.25) 14px 15px)}
.photo.wide{aspect-ratio:16/7}

/* 勾选列表 */
.ticks{list-style:none;display:grid;gap:14px;margin-top:28px}
.ticks li{padding-left:22px;position:relative}
.ticks li::before{content:"";position:absolute;left:0;top:.75em;width:10px;height:1px;background:var(--gold)}
.ticks.c2{grid-template-columns:1fr 1fr;column-gap:32px}

/* 规格表 */
.table-wrap{overflow-x:auto;border:1px solid var(--navy-line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:640px}
th,td{text-align:left;padding:18px 24px}
th{font-weight:500;color:var(--muted);font-size:13px;letter-spacing:.08em;background:var(--navy-raise)}
tbody tr+tr td{border-top:1px solid var(--navy-line)}
td:first-child{color:var(--ink);font-weight:500}
td{color:var(--muted)}

/* 架构图 */
.arch{display:grid;gap:10px;max-width:1000px;margin:0 auto}
.arch .row{display:grid;grid-template-columns:150px 1fr;border:1px solid var(--navy-line);border-radius:var(--radius);background:var(--navy-raise)}
.arch .row>b{display:flex;align-items:center;padding:20px 24px;font-weight:500;border-right:1px solid var(--navy-line);color:var(--gold)}
.arch .row>div{display:flex;flex-wrap:wrap;gap:10px;padding:16px 20px}
.arch span{border:1px solid var(--line);border-radius:var(--radius);padding:6px 14px;font-size:14px;color:var(--ink)}
.arch .row.hi{border-color:var(--gold)}

/* 流程 */
.flow{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);counter-reset:step}
.flow li{border-top:1px solid var(--navy-line);padding:24px 28px 0 0;counter-increment:step}
.flow li::before{content:"0" counter(step);display:block;font-family:"Outfit";font-size:28px;line-height:1;color:var(--gold);margin-bottom:14px}
.flow b{display:block;font-size:19px;font-weight:500;margin-bottom:10px}
.flow span{color:var(--muted);font-size:15px}

/* FAQ */
.faq{border-top:1px solid var(--navy-line)}
.faq details{border-bottom:1px solid var(--navy-line)}
.faq{max-width:960px;margin:0 auto}
.faq summary{list-style:none;cursor:pointer;padding:22px 40px 22px 0;font-size:17px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:20px;font-size:24px;color:var(--gold);transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--muted);padding:0 0 24px;max-width:48em}

/* 底部转化条 */
.cta-band{padding:96px 0;background:linear-gradient(120deg,var(--navy-hi),var(--navy-deep));border-top:1px solid var(--navy-line)}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,2.4vw,30px)}

/* 表单 */
form{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:grid;gap:8px}
.field .btn{justify-self:start}
.consent{grid-column:span 2;font-size:13px;color:var(--muted)}
.field.full,.form-note{grid-column:span 2}
label{font-size:14px;color:var(--ink)}
input,select,textarea{font:inherit;font-size:15px;color:var(--ink);background:var(--navy);border:1px solid var(--line-strong);border-radius:var(--radius);padding:12px 14px;outline:none;width:100%}
input::placeholder,textarea::placeholder{color:var(--placeholder)}
input:focus,select:focus,textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,166,107,.18)}
textarea{min-height:140px;resize:vertical}
.form-note{font-size:14px;color:var(--gold-soft);min-height:1.5em}

/* 页脚 */
footer{background:var(--navy-deep);border-top:1px solid var(--navy-line);padding:72px 0 32px;font-size:14px;color:var(--muted)}
.foot{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px}
.foot .ft{color:var(--ink);font-weight:500;font-size:15px;margin-bottom:18px}
.foot ul{list-style:none;display:grid;gap:10px}
.foot a:hover{color:var(--ink)}
.foot .brand{margin-bottom:20px}
.foot-bottom{margin-top:56px;padding-top:24px;border-top:1px solid var(--navy-line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px}
.beian{display:flex;gap:24px;flex-wrap:wrap}
.beian a:hover{color:var(--ink)}

/* 滚动入场 */
/* 只有 JS 生效时才先隐藏（<head> 里给 html 加 .js），JS 失效或打印时内容照常显示 */
.reveal{transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.js .reveal:not(.in){opacity:0;transform:translateY(24px)}
@media print{.reveal{opacity:1!important;transform:none!important}.streams,body::after{display:none}}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal:not(.in){opacity:1;transform:none}
  .reveal{transition:none}
  .btn,.link::after,.faq summary::after{transition:none}
  .btn:active,.link:hover::after{transform:none}
}

/* 移动端 */
@media (max-width:960px){
  .wrap{padding:0 16px}
  section{padding:72px 0}
  .nav ul,.nav>.wrap>.btn{display:none}
  .menu{display:block;position:relative}
  .menu summary{list-style:none;cursor:pointer;padding:8px 0;font-size:15px}
  .menu summary::-webkit-details-marker{display:none}
  .menu[open] ul{display:grid;gap:4px;position:fixed;top:72px;left:0;right:0;background:var(--navy-deep);border-bottom:1px solid var(--navy-line);padding:16px;font-size:17px;color:var(--ink)}
  .menu[open] li a{display:block;padding:10px 0}
  .page-hero{padding:128px 0 64px}
  .tiles.c2,.tiles.c3,.tiles.c4,.split,.ticks.c2,.flow,.foot,form{grid-template-columns:1fr}
  .tiles>*{padding:28px}
  .flow{gap:28px}
  .field.full,.form-note,.consent{grid-column:auto}
  .arch .row{grid-template-columns:1fr}
  .arch .row>b{border-right:0;border-bottom:1px solid var(--navy-line);padding:14px 20px}
}

/* 校徽：红色原色放深蓝底上发暗，垫白色圆底 */
.uni-logo{width:96px;height:96px;background:#fff;border-radius:50%;padding:5px}

/* ===== 背景层次：光晕、颗粒、流线 ===== */
/* 全站极细颗粒，去掉纯色的塑料感 */
body::after{content:"";position:fixed;inset:0;z-index:100;pointer-events:none;opacity:.05;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

main>section{position:relative;isolation:isolate}
/* 普通区块：右上冷光 + 左下一点暖金 */
main>section:not(.alt):not(.hero):not(.page-hero):not(.cta-band){
  background:radial-gradient(60% 55% at 100% 0%,rgba(52,96,168,.16),transparent 70%),
             radial-gradient(45% 45% at 0% 100%,rgba(201,166,107,.05),transparent 70%),var(--navy)}
/* 深色区块：上亮下暗的纵向渐变，顶边一条极淡高光 */
.alt{background:radial-gradient(50% 70% at 0% 0%,rgba(52,96,168,.12),transparent 70%),linear-gradient(180deg,var(--alt-top),var(--alt-bottom));box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}

.page-hero{background:radial-gradient(55% 90% at 88% 100%,rgba(201,166,107,.10),transparent 65%),
  radial-gradient(60% 80% at 15% 0%,rgba(52,96,168,.22),transparent 70%),var(--navy)}
.cta-band{background:radial-gradient(40% 120% at 90% 50%,rgba(201,166,107,.16),transparent 70%),linear-gradient(120deg,var(--navy-hi),var(--alt-bottom))}

/* 格子：顶部一层微光，悬停略亮 */
.tiles>*{background-image:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,0) 45%);transition:background-color .4s}
.tiles>a:hover{background-color:var(--navy-hover)}
.alt .tiles>a:hover{background-color:var(--navy-hover-alt)}

/* 千川：头图底部的横向水流带（main.js 生成） */
.streams{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none;-webkit-mask-image:linear-gradient(180deg,transparent 70%,#000 90%);mask-image:linear-gradient(180deg,transparent 70%,#000 90%)}
@media (max-width:960px){.streams{display:none}}
.streams .ln{fill:none;stroke:rgba(130,160,210,.22);stroke-width:1}
.page-hero .streams{-webkit-mask-image:linear-gradient(180deg,transparent 80%,#000 94%);mask-image:linear-gradient(180deg,transparent 80%,#000 94%)}
.streams .pulse{fill:none;stroke:var(--gold-soft);stroke-width:1.5;stroke-linecap:round;stroke-dasharray:22 978;opacity:.75;animation:stream linear infinite}
@keyframes stream{from{stroke-dashoffset:1000}to{stroke-dashoffset:0}}
@media (prefers-reduced-motion:reduce){.streams .pulse{display:none}}

/* 实景图：压暗、降饱和，底部叠深蓝渐变，让亮色照片融进深色页面 */
.shot{position:relative;border:1px solid var(--navy-line);border-radius:var(--radius);overflow:hidden}
.shot img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;filter:saturate(.95) contrast(1.03)}
.shot::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(200deg,rgba(11,29,58,0) 60%,rgba(11,29,58,.28))}

.mail{color:var(--gold);border-bottom:1px solid rgba(201,166,107,.4)}
.mail:hover{border-color:var(--gold)}

.unis{display:flex;gap:16px;flex:none}

/* 带封面图的格子卡片 */
.tiles>.card{padding:0;display:flex;flex-direction:column}
.card>img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.card>.body{padding:32px 36px 36px}
@media (max-width:960px){.card>.body{padding:24px 28px 28px}}

/* 产品界面图：原比例、不调色，下方注明示意 */
.ui-fig{max-width:1100px;margin:0 auto}
.shot.ui{box-shadow:0 30px 80px rgba(3,10,25,.55)}
.shot.ui img{aspect-ratio:auto;filter:none}
.shot.ui::after{display:none}
.ui-fig figcaption{text-align:center;color:var(--muted);font-size:13px;margin-top:16px}