/* ============================================================
   数航科技 (SHUNAV) — 智慧医院便民服务平台 官网样式
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root{
  --navy:#002878;         /* deep navy — primary */
  --navy-2:#001a54;
  --cyan:#0078A8;         /* cyan/teal — secondary */
  --cyan-2:#00A0D8;
  --green:#00A078;        /* green — accent */
  --green-2:#00C992;
  --ink:#0E1B2C;
  --muted:#4A5A70;
  --line:#E3E8F0;
  --bg:#FFFFFF;
  --bg-alt:#F4F7FB;
  --shadow:0 10px 40px rgba(0,40,120,.10);
  --shadow-sm:0 4px 16px rgba(0,40,120,.07);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
container,.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:13px 28px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--navy));color:#fff;box-shadow:0 8px 24px rgba(0,120,168,.35)}
.btn-primary:hover{box-shadow:0 12px 30px rgba(0,120,168,.45)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.26)}
.btn-block{width:100%;text-align:center}

/* ---------- Eyebrows & heads ---------- */
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:12px}
.section-head{text-align:center;max-width:760px;margin:0 auto 52px}
.section-head h2{font-size:34px;line-height:1.25;font-weight:800;letter-spacing:-.01em;margin-bottom:16px}
.section-head h3{font-size:24px;font-weight:800;margin-top:8px}
.section-head h3,.eyebrow,.brand-sub,.ph-banner,.call-doctor{white-space:nowrap}
.section-desc{color:var(--muted);font-size:16px}
.section-head h3{font-size:24px;font-weight:800;margin-top:8px}
.mt-large{margin-top:72px}

.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}

/* ---------- Header / Nav ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s ease,box-shadow .3s ease,backdrop-filter .3s ease}
.site-header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{width:44px;height:44px;object-fit:contain;border-radius:10px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:19px;font-weight:800;color:var(--navy)}
.site-header.scrolled .brand-name,.site-header.scrolled .brand-sub{color:var(--ink)}
.brand-sub{font-size:11.5px;color:var(--cyan);font-weight:600;letter-spacing:.04em}
.site-header:not(.scrolled) .brand-sub{color:rgba(255,255,255,.85)}
.site-header:not(.scrolled) .brand-name{color:#fff}

.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{flex:1;text-align:center;padding:9px 12px;border-radius:999px;font-size:14px;white-space:nowrap}
.site-header:not(.scrolled) .nav-links a{color:rgba(255,255,255,.92)}
.nav-links a:hover{background:rgba(0,120,168,.10);color:var(--cyan)}
.site-header:not(.scrolled) .nav-links a:hover{background:rgba(255,255,255,.16);color:#fff}
.nav-links a.active{color:var(--cyan);font-weight:700}
.site-header:not(.scrolled) .nav-links a.active{color:#fff}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.3s ease}
.site-header:not(.scrolled) .nav-toggle span{background:#fff}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 55%,#00123d 100%);color:#fff;overflow:hidden;padding:168px 0 110px}
.hero-bg{position:absolute;inset:0;background-image:radial-gradient(circle at 78% 18%,rgba(0,160,120,.28),transparent 38%),radial-gradient(circle at 15% 80%,rgba(0,120,168,.30),transparent 40%);pointer-events:none}
.hero-bg::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(circle at 50% 40%,#000,transparent 80%);mask-image:radial-gradient(circle at 50% 40%,#000,transparent 80%)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{color:var(--cyan-2)}
.hero-copy .eyebrow{color:var(--green-2)}
.hero h1{font-size:56px;line-height:1.08;font-weight:800;letter-spacing:-.02em;margin:6px 0 22px;background:linear-gradient(120deg,#ffffff,#bcdcff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-lede{font-size:18px;color:rgba(255,255,255,.88);max-width:520px;margin-bottom:16px}
.hero-moto{font-size:16px;font-weight:600;color:var(--green-2);margin-bottom:30px;letter-spacing:.03em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-actions .btn-ghost{color:#fff}
.hero-stats{display:flex;gap:36px;margin-top:44px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column}
.stat b{font-size:34px;font-weight:800;color:#fff;line-height:1}
.stat b::after{content:""}
.stat span{font-size:13.5px;color:rgba(255,255,255,.7);margin-top:6px}

/* Hero phone card */
.hero-card{display:flex;justify-content:center}
.phone-frame{position:relative;width:256px;background:linear-gradient(160deg,#0d3a7a,#00205c);border-radius:38px;padding:14px;box-shadow:0 30px 70px rgba(0,0,0,.35),inset 0 0 0 2px rgba(255,255,255,.12)}
.phone-notch{position:absolute;top:14px;left:50%;transform:translateX(-50%);width:96px;height:20px;background:#00205c;border-radius:0 0 14px 14px;z-index:3}
.phone-screen{border-radius:26px;overflow:hidden;background:var(--bg-alt);min-height:420px}
.ph-top{background:linear-gradient(135deg,var(--cyan),var(--navy));color:#fff;padding:26px 20px 16px;font-weight:700;font-size:17px}
.ph-banner{margin:14px 16px 0;background:linear-gradient(120deg,var(--green),var(--green-2));color:#fff;font-size:13px;font-weight:600;padding:10px 14px;border-radius:10px}
.ph-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px 8px;padding:20px 14px}
.ph-app{display:flex;flex-direction:column;align-items:center;gap:7px;text-align:center}
.ph-app i{font-size:12px;color:var(--muted);font-style:normal}
.ph-ic{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:17px;font-weight:800;color:#fff;box-shadow:var(--shadow-sm)}
.ic-1{background:linear-gradient(135deg,#3aa0ff,#1a6bd6)}
.ic-2{background:linear-gradient(135deg,#00C992,#00A078)}
.ic-3{background:linear-gradient(135deg,#00A0D8,#0078A8)}
.ic-4{background:linear-gradient(135deg,#0078A8,#005088)}
.ic-5{background:linear-gradient(135deg,#00A078,#00805f)}
.ic-6{background:linear-gradient(135deg,#1a6bd6,#0040a0)}
.ic-7{background:linear-gradient(135deg,#00C992,#0088ff)}
.ic-8{background:linear-gradient(135deg,#0078A8,#00A078)}

/* ---------- Audience grid ---------- */
.audience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.audience-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.audience-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.aud-ic{font-size:30px;margin-bottom:12px}
.audience-card h4{font-size:18px;font-weight:700;margin-bottom:6px;color:var(--navy)}
.audience-card p{color:var(--muted);font-size:14px}

/* ---------- Pain table ---------- */
.pain-table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--line);margin-top:8px}
.pain-table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px}
.pain-table thead th{background:linear-gradient(135deg,var(--navy),var(--cyan));color:#fff;padding:15px 18px;text-align:left;font-weight:600;white-space:nowrap}
.pain-table tbody td{padding:14px 18px;border-top:1px solid var(--line);vertical-align:top}
.pain-table tbody tr:nth-child(even){background:var(--bg-alt)}
.pain-table tbody tr:hover{background:#EAF3FB}
.pain-table td:first-child{font-weight:700;color:var(--navy);white-space:nowrap}

/* ---------- Module grid ---------- */
.module-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.module-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;position:relative;overflow:hidden}
.module-card::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--cyan),var(--green));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.module-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.module-card:hover::after{transform:scaleX(1)}
.m-ic{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;font-size:22px;margin-bottom:16px;color:#fff;box-shadow:var(--shadow-sm)}
.module-card h4{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.module-card p{color:var(--muted);font-size:13.8px;line-height:1.6}

/* ---------- Timeline (scenarios) ---------- */
.timeline{position:relative;max-width:820px;margin:0 auto}
.timeline::before{content:"";position:absolute;left:27px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--cyan),var(--green))}
.tl-item{position:relative;padding:0 0 30px 76px}
.tl-item:last-child{padding-bottom:0}
.tl-mark{position:absolute;left:0;top:2px;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--navy));color:#fff;display:grid;place-items:center;font-size:22px;font-weight:800;box-shadow:0 6px 18px rgba(0,120,168,.35)}
.tl-body h4{font-size:19px;font-weight:700;color:var(--navy);margin-bottom:8px}
.tl-body p{color:var(--muted);font-size:14.5px}
.flow{font-size:13.5px;font-weight:600;color:var(--cyan);background:var(--bg-alt);border:1px solid var(--line);border-radius:8px;padding:9px 12px;margin:10px 0;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.flow > *{white-space:nowrap}

/* ---------- Architecture ---------- */
.arch-wrap{max-width:760px;margin:0 auto 52px}
.arch-layer{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-sm);text-align:center}
.arch-layer:not(:last-child){margin-bottom:0}
.arch-arrow{text-align:center;color:var(--cyan);font-size:20px;font-weight:700;margin:6px 0}
.arch-label{font-size:17px;font-weight:800;color:var(--navy);margin-bottom:14px}
.arch-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.arch-tags span,.arch-grid span{font-size:13px;font-weight:600;color:var(--cyan);background:#E8F3FB;border:1px solid #D3E9F7;padding:5px 12px;border-radius:999px}
.arch-integration{background:var(--bg-alt)}
.arch-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:6px}
.arch-node{display:flex;flex-direction:column;align-items:flex-start;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.arch-node b{font-size:15px;color:var(--navy);font-weight:800}
.arch-node span{font-size:12px;margin-top:4px;white-space:nowrap}

.integration-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.integ-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .25s ease,box-shadow .25s ease}
.integ-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.integ-card h4{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:10px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.integ-card h4::before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--green))}
.integ-card p{color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- Security grid ---------- */
.security-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sec-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.sec-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.sec-ic{font-size:32px;margin-bottom:14px}
.sec-card h4{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:10px}
.sec-card p{color:var(--muted);font-size:13.8px;line-height:1.7}

/* ---------- Steps (implementation) ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:64px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.step-no{font-size:44px;font-weight:800;line-height:1;background:linear-gradient(135deg,var(--cyan),var(--green));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block;margin-bottom:8px}
.step h4{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:8px}
.step p{color:var(--muted);font-size:13.8px}

.future-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.future-item{display:flex;flex-direction:column;align-items:flex-start;background:var(--bg-alt);border:1px solid var(--line);border-radius:14px;padding:20px 22px;transition:transform .2s ease,box-shadow .2s ease}
.future-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.fut-ic{font-size:24px;margin-bottom:10px}
.future-item b{font-size:15px;font-weight:700;color:var(--navy);margin-bottom:4px}
.future-item p{font-size:12.8px;color:var(--muted)}

/* ---------- Queue Calling ---------- */
.bw{white-space:nowrap}

/* Prevent awkward wrapping around Chinese separators */
.eyebrow,.section-head h2,.section-head h3,.hero-moto,.ph-banner,.brand-sub,.call-doctor,.flow > *,.contact-list span,.arch-node span,.integ-card h4,.qsc-card h4,.qsc-card p,.step p,.sec-card p,.module-card p,.tl-body p,.integ-card p,td{hyphens:none}

.section-queue{background:var(--bg-alt)}
.queue-scenarios{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:52px}
.qsc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.qsc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.qsc-ic{font-size:36px;margin-bottom:14px}
.qsc-card h4{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:10px;line-height:1.4;white-space:normal}
.qsc-card p{color:var(--muted);font-size:14px;line-height:1.65}

.queue-split{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:center}
.queue-visual{display:flex;justify-content:center}
.call-screen{width:340px;background:linear-gradient(160deg,var(--navy),var(--navy-2));border-radius:18px;padding:22px;color:#fff;box-shadow:var(--shadow)}
.call-status{text-align:center;font-size:13px;font-weight:600;color:var(--green-2);margin-bottom:16px;display:flex;align-items:center;justify-content:center;gap:8px}
.call-status::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--green-2);display:inline-block;animation:qpulse 1.6s ease-in-out infinite}
@keyframes qpulse{0%,100%{opacity:1}50%{opacity:.3}}
.call-current{text-align:center;background:rgba(255,255,255,.1);border-radius:14px;padding:18px;margin-bottom:14px}
.call-current-label{font-size:13px;color:rgba(255,255,255,.75)}
.call-ticket{font-size:56px;font-weight:800;line-height:1.1;margin:6px 0;background:linear-gradient(120deg,#fff,#bcdcff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.call-doctor{font-size:14px;color:var(--cyan-2);font-weight:600}
.call-message{text-align:center;font-size:15px;font-weight:600;margin-bottom:16px;color:#fff}
.call-wait-title{font-size:12px;color:rgba(255,255,255,.65);margin-bottom:8px}
.call-wait ul{list-style:none}
.call-wait li{display:flex;justify-content:space-between;background:rgba(255,255,255,.08);border-radius:8px;padding:9px 14px;margin-bottom:6px;font-size:13px}
.wticket{font-weight:800;color:#fff}
.wroom{color:var(--cyan-2)}

.queue-info h3{font-size:24px;font-weight:800;color:var(--navy);margin-bottom:12px;line-height:1.3}
.queue-info>p{color:var(--muted);font-size:15px;margin-bottom:24px}
.queue-features{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.qf-item{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.qf-item .qf-body{flex:1;min-width:0}
.qf-item h4{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:4px;line-height:1.4;white-space:normal}
.qf-item p{font-size:12.8px;color:var(--muted);line-height:1.55}

.queue-flow{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:48px}
.qflow-step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-sm)}
.qflow-step b{font-size:22px;font-weight:800;background:linear-gradient(135deg,var(--cyan),var(--green));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.qflow-step span{font-size:14px;font-weight:600;color:var(--ink)}
.qflow-arrow{font-size:22px;color:var(--cyan);font-weight:800}

/* ---------- Contact ---------- */
.contact{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.contact .eyebrow{color:var(--green-2)}
.contact .section-head{margin-bottom:44px}
.contact .section-head h2{color:#fff}
.contact .section-desc{color:rgba(255,255,255,.8)}
.contact-card{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:24px;padding:44px;backdrop-filter:blur(8px)}
.contact-text h2{font-size:30px;font-weight:800;margin-bottom:16px;line-height:1.25}
.contact-text>p{color:rgba(255,255,255,.82);margin-bottom:24px}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.contact-list li{display:flex;gap:14px}
.contact-list b{min-width:76px;color:var(--green-2);font-weight:700;white-space:nowrap}
.contact-list span{color:rgba(255,255,255,.9)}
.contact-form{background:#fff;border-radius:18px;padding:30px;color:var(--ink);box-shadow:var(--shadow)}
.contact-form h4{font-size:19px;font-weight:800;color:var(--navy);margin-bottom:18px}
.f-row{display:flex;gap:12px;margin-bottom:12px}
.contact-form label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:600;flex:1}
.contact-form input{border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-size:14px;font-family:inherit;outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.contact-form input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,120,168,.14)}
.btn-block{margin-top:8px}
.form-tip{font-size:12px;color:var(--muted);margin-top:12px;text-align:center}

/* ---------- Footer ---------- */
.site-footer{background:#001224;color:rgba(255,255,255,.72);padding:60px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1.4fr;gap:40px;padding-bottom:40px}
.footer-brand{display:flex;flex-direction:column}
.footer-logo{width:56px;height:56px;object-fit:contain;border-radius:12px;margin-bottom:14px;background:#fff;padding:4px}
.footer-name{font-size:20px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-desc{font-size:13.8px;max-width:380px;line-height:1.7}
.footer-contact{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:9px;font-size:13px}
.footer-contact li{color:rgba(255,255,255,.72)}
.footer-cols{display:flex;gap:48px}
.footer-col h5{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col a{display:block;font-size:13.5px;margin-bottom:10px;color:rgba(255,255,255,.62);transition:color .2s ease}
.footer-col a:hover{color:var(--green-2)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom .container{text-align:center}

/* ---------- Back to top ---------- */
.back-to-top{position:fixed;bottom:28px;right:28px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--navy));color:#fff;display:none;place-items:center;font-size:20px;cursor:pointer;box-shadow:var(--shadow);z-index:90;border:0;transition:transform .2s ease}
.back-to-top:hover{transform:translateY(-3px)}
.back-to-top.show{display:grid}

/* ---------- Reveal on scroll (handled in JS) ---------- */

/* ---------- Responsive ---------- */
@media(max-width:1100px){
  /* 联系区：两栏在 ~1000-1200px 之间过挤，提前折成单栏，表单不再被顶到最右 */
  .contact-card{grid-template-columns:1fr;gap:40px}
}
@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero h1{font-size:42px}
  .hero-card{order:-1}
  .audience-grid,.security-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .module-grid{grid-template-columns:repeat(2,1fr)}
  .integration-cards{grid-template-columns:1fr}
  .future-grid{grid-template-columns:repeat(2,1fr)}
  .queue-scenarios,.queue-split,.queue-features{grid-template-columns:1fr}
  .contact-card{grid-template-columns:1fr;gap:32px;padding:32px}
  .footer-inner{grid-template-columns:1fr}
  .footer-cols{gap:28px}
}
@media(max-width:640px){
  .nav-toggle{flex-direction:column;display:flex}
  .nav-links{position:fixed;inset:64px 0 auto 0;flex-direction:column;background:#fff;padding:16px 20px 24px;gap:4px;box-shadow:var(--shadow);transform:translateY(-140%);transition:transform .3s ease;border-bottom-left-radius:18px;border-bottom-right-radius:18px}
  .nav-links.open{transform:none}
  .nav-links a{color:var(--ink)!important;width:100%}
  .nav-links a.active{color:var(--cyan)!important}
  .hero{padding:130px 0 80px}
  .hero h1{font-size:36px}
  .hero-lede{font-size:16px}
  .hero-moto{font-size:14px}
  .hero-stats{gap:24px}
  .stat b{font-size:28px}
  .section{padding:64px 0}
  .section-head h2{font-size:27px}
  .audience-grid,.security-grid,.steps,.module-grid,.future-grid,.arch-grid{grid-template-columns:1fr}
  .call-screen{width:100%}
  .f-row{flex-direction:column}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%;text-align:center}
  .footer-cols{gap:22px}
  .contact-card{padding:24px}
}