/* 老米智能官网 — 公共样式（渔业科技感，待确认品牌色后全局替换） */
:root{
  --brand:      #143a6e;   /* 深蓝（页面主色）*/
  --brand-deep: #0d2950;
  --aqua:       #2f86d6;   /* 亮蓝（强调色）*/
  --aqua-soft:  #cfe0f2;
  --ink:        oklch(24% 0.03 250);
  --ink-2:      oklch(45% 0.025 250);
  --ink-3:      oklch(60% 0.02 250);
  --line:       oklch(90% 0.015 248);
  --paper:      oklch(98% 0.012 248);
  --paper-2:    oklch(95% 0.02 248);
  --dark:       oklch(20% 0.045 252);
  --dark-2:     oklch(26% 0.05 252);
  --dark-line:  oklch(38% 0.04 250);
  --dark-ink:   oklch(92% 0.015 250);
  --r-sm:6px;--r-md:10px;--r-lg:16px;
  --ease:cubic-bezier(.22,1,.36,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC",system-ui,-apple-system,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{font-family:"Space Grotesk","Noto Sans SC",sans-serif;font-weight:600;letter-spacing:-.02em;line-height:1.15;color:var(--ink);margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
p{margin:0}
.wrap{max-width:var(--container);margin:0 auto;padding:0 clamp(20px,4vw,40px)}
.eyebrow{font-family:"Space Grotesk",sans-serif;font-size:13px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua);display:inline-flex;align-items:center;gap:8px}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--aqua)}

/* btn */
.btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;border:0;font-family:inherit;font-size:15px;font-weight:500;padding:11px 22px;border-radius:var(--r-sm);transition:transform .2s var(--ease),background .2s,border-color .2s,color .2s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-aqua{background:var(--aqua);color:oklch(22% 0.04 255)}
.btn-aqua:hover{background:#1c63ad}
.btn-sm{padding:8px 14px;font-size:13px}

/* nav — 默认透明叠深 hero 用白字，scrolled 后浅背景用深字 */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s var(--ease),border-color .3s;border-bottom:1px solid transparent}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:18px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo img{height:32px;width:auto;display:block}
.logo .logo-dark{display:none;height:60px;width:auto} /* 深色版 logo 默认隐藏，下拉且有该文件时切换显示；深色图字占比小，放大至 60px 使字与浅色版视觉一致 */
.menu{display:flex;align-items:center;gap:24px;flex:1;justify-content:center}
.menu a{font-size:14px;color:rgba(255,255,255,.85);transition:color .2s;white-space:nowrap}
.menu a:hover,.menu a.active{color:#fff}
.menu a.active{font-weight:500}
.nav-cta{display:flex;gap:8px;align-items:center;white-space:nowrap}
.nav-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.4)}
.nav-cta .btn-ghost:hover{border-color:var(--aqua);color:var(--aqua)}
.nav-toggle{display:none;width:40px;height:40px;border:0;background:transparent;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0;border-radius:var(--r-sm)}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;transition:transform .3s var(--ease),opacity .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav.scrolled{background:oklch(98% 0.012 248 / .92);backdrop-filter:blur(12px);border-color:var(--line)}
.has-dark-logo .nav.scrolled .logo .logo-light{display:none}
.has-dark-logo .nav.scrolled .logo .logo-dark{display:block}
.nav.scrolled .menu a{color:var(--ink-2)}
.nav.scrolled .menu a:hover,.nav.scrolled .menu a.active{color:var(--brand)}
.nav.scrolled .nav-cta .btn-ghost{color:var(--ink);border-color:var(--line)}
.nav.scrolled .nav-cta .btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.nav.scrolled .nav-toggle span{background:var(--ink)}
@media(max-width:1100px){.nav-cta .btn-ghost{display:none}}
@media(max-width:980px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .menu{display:none;position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--paper);flex-direction:column;align-items:stretch;gap:0;padding:8px clamp(20px,4vw,40px) 32px;overflow-y:auto;border-top:1px solid var(--line);box-shadow:0 20px 40px -20px oklch(20% 0.04 250 / .3)}
  .menu.open{display:flex}
  .menu.open a{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px;white-space:normal;color:var(--ink-2)}
  .menu.open a:hover,.menu.open a.active{color:var(--brand)}
  .menu.open a:last-child{border-bottom:0}
}

/* hero */
.hero{position:relative;background:var(--dark);color:var(--dark-ink);overflow:hidden;padding:120px 0 80px}
.hero::before{content:"";position:absolute;inset:0;background-image:var(--hero-bg);background-size:cover;background-position:center;opacity:.3;filter:saturate(.7)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,var(--dark) 0%,oklch(20% 0.045 252 / .85) 45%,oklch(20% 0.045 252 / .2) 100%)}
.hero .wrap{position:relative;z-index:2}
.hero h1{color:#fff;font-size:clamp(32px,5vw,56px);margin:.2em 0 .35em;max-width:18ch}
.hero h1 em{font-style:normal;color:var(--aqua)}
.hero .sub{font-size:clamp(15px,1.3vw,18px);color:oklch(82% 0.012 250);max-width:54ch;margin-bottom:28px}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn-ghost{color:#fff;border-color:oklch(45% 0.03 250)}
.hero .btn-ghost:hover{border-color:var(--aqua);color:var(--aqua)}

/* links-bar */
.links-bar{background:var(--dark-2);border-top:1px solid var(--dark-line);border-bottom:1px solid var(--dark-line);color:var(--dark-ink)}
.links-bar .wrap{display:flex;align-items:center;gap:clamp(16px,3vw,40px);padding:22px 0;flex-wrap:wrap}
.links-bar .lbl{font-family:"Space Grotesk",sans-serif;font-size:13px;letter-spacing:.1em;color:oklch(68% 0.012 250)}
.links-bar .item{display:flex;align-items:center;gap:8px;font-size:15px;color:oklch(90% 0.012 250)}
.links-bar .item .n{font-family:"Space Grotesk",sans-serif;color:var(--aqua);font-weight:600}

/* section */
section{padding:clamp(64px,8vw,100px) 0}
.sec-head{max-width:62ch;margin-bottom:clamp(36px,4vw,52px)}
.sec-head h2{font-size:clamp(24px,3vw,38px);margin:.2em 0 .4em}
.sec-head p{color:var(--ink-2);font-size:clamp(15px,1.2vw,17px)}

/* module grid */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.mod{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--paper);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;display:flex;flex-direction:column}
.mod:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px oklch(20% 0.04 250 / .4);border-color:var(--aqua-soft)}
.mod .pic{height:170px;background-size:cover;background-position:center;position:relative}
.mod .pic::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,oklch(20% 0.045 252 / .5))}
.mod .idx{position:absolute;top:12px;left:12px;z-index:2;font-family:"Space Grotesk",sans-serif;font-size:12px;background:oklch(20% 0.045 252 / .7);color:var(--aqua);padding:4px 10px;border-radius:4px;letter-spacing:.06em}
.mod .body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.mod h3{font-size:18px;margin:0 0 8px;text-align:center}
.mod p{font-size:15px;color:var(--ink-2);flex:1;text-align:center}
@media(max-width:900px){.mod-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.mod-grid{grid-template-columns:1fr}}

/* 首页入口网格 */
.entry-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.entry-cards .card{position:relative;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--paper);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;display:flex;flex-direction:column;min-height:240px}
.entry-cards .card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px oklch(20% 0.04 250 / .4);border-color:var(--aqua)}
.entry-cards .card .pic{height:140px;background-size:cover;background-position:center;position:relative}
.entry-cards .card .pic::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,oklch(20% 0.045 252 / .6))}
.entry-cards .card .body{padding:22px;flex:1;display:flex;flex-direction:column}
.entry-cards .card h3{font-size:19px;margin:0 0 8px}
.entry-cards .card p{font-size:14px;color:var(--ink-2);flex:1;margin-bottom:14px}
.entry-cards .card .go{font-size:14px;color:var(--brand);font-weight:500}
.entry-cards .card.feat{grid-column:span 1}
@media(max-width:900px){.entry-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.entry-cards{grid-template-columns:1fr}}

/* 入口区（小程序码等） */
.entry{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.entry-card-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:36px;display:flex;flex-direction:column;gap:14px}
.entry-card-box h3{font-size:22px}
.entry-card-box p{color:var(--ink-2);font-size:15px}
.qr-row{display:flex;align-items:center;gap:20px;margin-top:8px}
.qr-box{width:120px;height:120px;border:1px dashed var(--ink-3);border-radius:var(--r-sm);display:grid;place-items:center;background:oklch(96% 0.012 248);color:var(--ink-3);font-size:12px;text-align:center;padding:8px}
.qr-box.placeholder{background:repeating-linear-gradient(45deg,var(--paper-2),var(--paper-2) 8px,oklch(94% 0.012 248) 8px,oklch(94% 0.012 248) 16px)}
.qr-box.real{border-style:solid;border-color:var(--line);background:#fff;padding:6px;object-fit:contain}
.qr-meta{font-size:13px;color:var(--ink-3);line-height:1.6}
.qr-meta b{display:block;color:var(--ink);font-size:15px;font-family:"Space Grotesk",sans-serif}
@media(max-width:760px){.entry-grid{grid-template-columns:1fr}}

/* 占位区 */
.placeholder-block{border:1px dashed var(--line);border-radius:var(--r-md);padding:clamp(40px,6vw,72px);text-align:center;background:var(--paper-2);color:var(--ink-3)}
.placeholder-block h3{color:var(--ink-2);font-size:20px;margin-bottom:10px}
.placeholder-block p{font-size:14px;max-width:48ch;margin:0 auto}

/* 关于我们 — 公司简介 */
.about-body{display:grid;grid-template-columns:300px 1fr;gap:clamp(24px,4vw,56px);align-items:start}
.honors{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.honors li{position:relative;padding:12px 14px 12px 38px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--paper);font-size:14px;color:var(--ink-2);line-height:1.5}
.honors li::before{content:"";position:absolute;left:14px;top:50%;transform:translateY(-50%);width:11px;height:11px;border-radius:3px;background:var(--aqua)}
.about-text p{font-size:clamp(15px,1.2vw,17px);line-height:1.9;color:var(--ink-2);margin:0 0 18px}
.about-text p:last-child{margin-bottom:0}
.about-text b{color:var(--ink)}
@media(max-width:760px){.about-body{grid-template-columns:1fr}}

/* CTA */
.cta{background:var(--brand);color:#fff;text-align:center}
.cta .wrap{padding:clamp(56px,7vw,84px) clamp(20px,4vw,40px)}
.cta h2{color:#fff;font-size:clamp(24px,3.2vw,38px);margin:.2em auto .4em;max-width:20ch}
.cta p{color:oklch(94% 0.02 250);max-width:48ch;margin:0 auto 28px}
.cta .btn-ghost{color:#fff;border-color:oklch(88% 0.04 250)}
.cta .btn-ghost:hover{border-color:#fff}

/* footer */
footer{background:var(--dark);color:oklch(72% 0.012 250);padding:40px 0 28px}
footer .wrap{display:flex;justify-content:space-between;gap:clamp(32px,5vw,72px);flex-wrap:wrap;align-items:flex-start}
footer .logo{color:#fff;display:inline-block;margin-bottom:14px}
footer .f-about{flex:1 1 260px;max-width:380px}
footer .f-intro{font-size:13px;line-height:1.85;color:oklch(72% 0.012 250);margin:0}
footer .f-links{display:flex;gap:clamp(22px,3vw,48px);flex-wrap:wrap}
footer .f-col{display:flex;flex-direction:column;gap:10px;min-width:78px}
footer .f-col-h{font-family:"Space Grotesk",sans-serif;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:oklch(54% 0.012 250);margin-bottom:2px}
footer .f-col a{font-size:14px;color:oklch(82% 0.012 250);transition:color .2s}
footer .f-col a:hover{color:#fff}
footer .f-col a.f-feat{color:#fff;font-weight:600}
footer .f-line{font-size:14px;color:oklch(82% 0.012 250);transition:color .2s}
footer .f-line .k{color:oklch(54% 0.012 250);margin-right:8px}
footer .f-line:hover{color:#fff}
@media(max-width:640px){footer .f-about{max-width:none;flex-basis:100%}footer .f-links{width:100%;justify-content:space-between}}
footer .copy{width:100%;border-top:1px solid var(--dark-line);margin-top:20px;padding-top:18px;font-size:13px;color:oklch(58% 0.012 250);line-height:1.8}
footer .copy a{color:oklch(72% 0.012 250)}
footer .copy a:hover{color:#fff}

/* form */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:680px}
.form-grid .full{grid-column:span 2}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:13px;color:var(--ink-2);font-weight:500}
.field input,.field textarea,.field select{padding:10px 14px;border:1px solid var(--line);border-radius:var(--r-sm);font-family:inherit;font-size:15px;background:var(--paper);color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand)}
.field textarea{min-height:120px;resize:vertical}
@media(max-width:560px){.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:span 1}}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 智慧渔场 — 产品体系总览图 + 模块详情折叠 */
.overview{padding:56px 0 12px}
.overview .ov-img{width:100%;border-radius:14px;box-shadow:0 12px 34px rgba(13,41,80,.14);display:block;background:var(--paper-2)}
.overview .ov-cap{color:var(--ink-3);font-size:16px;margin-top:18px;line-height:1.9;text-align:center;max-width:none}
.mod{position:relative}
.mod.expanded{overflow:visible;z-index:30}
.mod .body .detail-btn{margin-top:14px;align-self:center;font-size:13px;color:var(--aqua);background:oklch(97% 0.025 250);border:1px solid var(--aqua-soft);padding:7px 16px;border-radius:8px;cursor:pointer;transition:.2s var(--ease)}
.mod .body .detail-btn:hover{background:var(--aqua);color:#fff;border-color:var(--aqua)}
.mod .mod-full{position:absolute;top:100%;left:0;right:0;z-index:30;max-height:0;overflow:hidden;opacity:0;visibility:hidden;pointer-events:none;transition:max-height .4s var(--ease),opacity .3s var(--ease),visibility 0s .4s}
.mod.expanded .mod-full{max-height:560px;opacity:1;visibility:visible;pointer-events:auto;overflow:auto;background:var(--paper);border:1px solid var(--aqua-soft);border-top:none;border-radius:0 0 var(--r-md) var(--r-md);box-shadow:0 26px 46px -20px oklch(20% 0.06 252/.5);padding:16px 22px 22px;transition:max-height .4s var(--ease),opacity .3s var(--ease),visibility 0s 0s}
.mod .mod-full p{font-size:13px;color:var(--ink-2);line-height:1.85;margin:0}

/* 二级页面 — 模块详情（智慧渔场十大能力模块） */
.sub-body{max-width:74ch}
.sub-body>p{font-size:clamp(15px,1.2vw,17px);line-height:1.95;color:var(--ink-2);margin:0 0 18px}
.sub-list{list-style:none;margin:10px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.sub-list li{position:relative;padding:14px 16px 14px 42px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--paper);font-size:14px;color:var(--ink-2);line-height:1.6}
.sub-list li::before{content:"";position:absolute;left:16px;top:50%;transform:translateY(-50%);width:12px;height:12px;border-radius:4px;background:var(--aqua)}
@media(max-width:640px){.sub-list{grid-template-columns:1fr}}
.related{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.mod .mod-full .detail-link{display:inline-block;margin-top:12px;color:var(--brand);font-weight:500;font-size:13px}
.mod .mod-full .detail-link:hover{color:var(--aqua)}

/* 关于我们 — 地图组件 */
.map-sec{padding:64px 0}
.map-box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:0 12px 34px rgba(13,41,80,.10)}
.map-box iframe{display:block;width:100%;height:420px;border:0}
.map-actions{display:flex;flex-wrap:wrap;gap:12px;padding:18px 20px 6px}
.map-actions .btn{margin:0}
.map-note{margin:0;padding:0 20px 18px;color:var(--ink-3);font-size:13px;line-height:1.7}
@media(max-width:640px){.map-box iframe{height:320px}}