/* HIU4D — 深海潜望 periscope hero + 卡片流. 深鲨蓝 #06131A × 鲨光青 #5ED7E8 */
:root{
  --bg:#06131A;--panel:#0B2230;--panel2:#0E2A3A;--text:#E3F4F9;--muted:#8FB3C2;
  --neon:#5ED7E8;--warn:#FFC857;--bad:#FF5D5D;--ok:#4ADE80;
  --glow:0 0 12px rgba(94,215,232,.4),0 0 26px rgba(94,215,232,.2);
  --grad-panel:linear-gradient(150deg,#0E2A3A 0%,#06131A 100%);
  --font-h:'Orbitron',sans-serif;--font-b:'Commissioner',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-b);line-height:1.7;font-size:16px}
img,svg{max-width:100%;vertical-align:middle}
a{color:var(--neon);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 16px}
.container.narrow{max-width:840px}
.center{text-align:center}
.site-header{position:sticky;top:0;z-index:50;background:rgba(6,19,26,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(94,215,232,.35)}
.header-in{display:flex;align-items:center;gap:14px;min-height:60px}
.brand{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-h);font-weight:700;font-size:1.15rem;color:var(--text);white-space:nowrap}
.brand:hover{text-decoration:none}
.nav-desktop{display:none;margin-left:auto;gap:18px}
.nav-desktop a{color:var(--muted);font-weight:500;font-size:.9rem}
.nav-desktop a:hover{color:var(--neon);text-decoration:none}
.header-cta{display:flex;gap:8px;margin-left:auto}
.nav-desktop+.header-cta{margin-left:0}
.btn{display:inline-block;padding:10px 20px;border-radius:10px;font-family:var(--font-h);font-weight:700;font-size:.85rem;cursor:pointer;border:1px solid transparent;transition:transform .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#5ED7E8,#39A8C4);color:#06131A;box-shadow:var(--glow)}
.btn-secondary{background:transparent;color:var(--neon);border-color:rgba(94,215,232,.55)}
.btn-block{display:block;width:100%;text-align:center}
.pulse{animation:pulse-glow 2s infinite}
@keyframes pulse-glow{0%,100%{box-shadow:0 0 8px rgba(94,215,232,.4)}50%{box-shadow:0 0 22px rgba(94,215,232,.8)}}
.nav-toggle{display:none}
.burger{display:flex;flex-direction:column;gap:4px;cursor:pointer;padding:6px;margin-left:4px}
.burger span{width:22px;height:2px;background:var(--neon);border-radius:2px}
.m-nav{display:none;background:var(--panel);border-bottom:1px solid rgba(94,215,232,.3)}
.m-nav-group{padding:10px 16px}
.m-nav-group h3{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--neon);margin-bottom:6px;font-weight:700}
.m-nav-group a{display:block;padding:6px 0;color:var(--text)}
.nav-toggle:checked~.m-nav{display:block}
/* periscope hero */
.peri-hero{padding:40px 0 10px;background:radial-gradient(80% 60% at 50% 0%,rgba(94,215,232,.12),transparent 70%)}
.peri-wrap{display:flex;flex-direction:column;gap:22px}
.peri-scope{display:flex;flex-direction:column;align-items:center}
.scope-lens{position:relative;width:210px;height:210px;border-radius:50%;overflow:hidden;
  background:radial-gradient(circle at 50% 40%,#12506A 0%,#0A2937 45%,#04121A 100%);
  border:6px solid #0E2A3A;outline:2px solid rgba(94,215,232,.6);box-shadow:var(--glow)}
.sonar{position:absolute;left:50%;top:42%;width:12px;height:12px;border-radius:50%;border:2px solid rgba(94,215,232,.7);transform:translate(-50%,-50%);animation:sonar 3s linear infinite}
.s2{animation-delay:1s}.s3{animation-delay:2s}
@keyframes sonar{from{width:12px;height:12px;opacity:.9}to{width:190px;height:190px;opacity:0}}
.bub{position:absolute;bottom:8px;width:8px;height:8px;border-radius:50%;background:rgba(94,215,232,.5);animation:bub 5s linear infinite}
.b1{left:30%;animation-delay:.3s}.b2{left:58%;width:5px;height:5px;animation-delay:1.8s}.b3{left:74%;width:11px;height:11px;animation-delay:3.2s}
@keyframes bub{from{transform:translateY(0);opacity:.8}to{transform:translateY(-170px);opacity:0}}
.cross-h{position:absolute;left:8%;right:8%;top:50%;height:1px;background:rgba(94,215,232,.35)}
.cross-v{position:absolute;top:8%;bottom:8%;left:50%;width:1px;background:rgba(94,215,232,.35)}
.scope-stem{width:14px;height:34px;background:linear-gradient(#0E2A3A,#06131A);border:1px solid rgba(94,215,232,.5);border-top:none;border-radius:0 0 6px 6px}
.peri-copy{text-align:center}
.peri-copy h1{font-family:var(--font-h);font-size:clamp(2.3rem,7vw,3.8rem);letter-spacing:.08em;text-shadow:var(--glow)}
.hero-sub{max-width:640px;margin:12px auto 20px;color:var(--muted)}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.gauge-card{background:var(--grad-panel);border:1px solid rgba(94,215,232,.4);border-radius:14px;padding:16px 18px;box-shadow:var(--glow)}
.gauge-title{font-family:var(--font-h);font-size:.8rem;letter-spacing:.14em;color:var(--neon);text-transform:uppercase;margin-bottom:12px}
.gauge-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.g-lev{font-family:var(--font-h);font-size:.75rem;width:46px;flex:none}
.l-ok{color:var(--ok)}.l-warn{color:var(--warn)}.l-bad{color:var(--bad)}
.g-track{width:70px;height:8px;border-radius:99px;background:rgba(94,215,232,.12);overflow:hidden;display:flex;align-items:flex-end}
.g-track i{display:block;width:100%;background:linear-gradient(180deg,#5ED7E8,#2E8FA8);border-radius:99px}
.g-lab{font-size:.82rem;color:var(--muted)}
.section{padding:38px 0}
.section-alt{background:rgba(11,34,48,.55)}
.sec-title{font-family:var(--font-h);font-size:1.4rem;margin-bottom:18px;text-align:center}
.sec-sub{color:var(--muted);text-align:center;margin:-10px 0 18px;font-size:.95rem}
.grid-3,.grid-4{display:grid;gap:16px;grid-template-columns:1fr;margin-bottom:8px}
.glow-card{display:block;background:var(--grad-panel);border:1px solid rgba(94,215,232,.35);border-radius:14px;padding:18px;color:var(--text);transition:border-color .15s,box-shadow .15s}
.glow-card:hover{border-color:var(--neon);box-shadow:var(--glow);text-decoration:none}
.glow-card h3{font-family:var(--font-h);font-size:1rem;margin-bottom:6px;color:var(--neon)}
.glow-card p{color:var(--muted);font-size:.92rem}
.nc-icon{font-size:1.5rem;display:block;margin-bottom:8px}
/* 追损预警信号分级卡 */
.depth-zones{display:grid;gap:14px;margin:16px 0}
.dz{border-radius:14px;padding:16px 18px;border:1px solid;position:relative;overflow:hidden}
.dz::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px}
.dz-green{background:rgba(74,222,128,.07);border-color:rgba(74,222,128,.5)}
.dz-green::before{background:var(--ok)}
.dz-yellow{background:rgba(255,200,87,.07);border-color:rgba(255,200,87,.5)}
.dz-yellow::before{background:var(--warn)}
.dz-red{background:rgba(255,93,93,.07);border-color:rgba(255,93,93,.55)}
.dz-red::before{background:var(--bad)}
.dz-head{display:flex;align-items:baseline;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.dz-depth{font-family:var(--font-h);font-size:.72rem;letter-spacing:.1em;padding:2px 10px;border-radius:99px;border:1px solid currentColor}
.dz-green .dz-depth{color:var(--ok)}.dz-yellow .dz-depth{color:var(--warn)}.dz-red .dz-depth{color:var(--bad)}
.dz-head h3{font-family:var(--font-h);font-size:.98rem}
.dz p,.dz ul{color:var(--muted);font-size:.93rem}
.dz ul{margin-left:18px}
.dz li{margin-bottom:5px}
.dz strong{color:var(--text)}
/* flow ilustrasi */
.flow{margin:16px 0;padding:20px;display:block}
.flow>*{border-radius:10px;padding:11px 14px;margin-bottom:9px;font-size:.95rem;background:rgba(6,19,26,.55);border:1px solid rgba(94,215,232,.35)}
.flow-step strong{color:var(--neon)}
.flow-end{border:1px dashed rgba(94,215,232,.5);color:var(--muted)}
.prose .note{color:var(--muted);font-size:.9rem}
.page-head{padding-top:22px}
.page-head h1,.prose h1{font-family:var(--font-h);font-size:clamp(1.5rem,4.5vw,2.1rem)}
.prose h2{font-family:var(--font-h);font-size:1.25rem;margin:26px 0 10px}
.prose h3{font-size:1.05rem;font-weight:700;margin:20px 0 8px;color:var(--neon)}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 14px 22px}
.prose li{margin-bottom:6px}
.steps li{margin-bottom:10px}
.steps li strong{color:var(--neon)}
.quick-form{display:grid;gap:8px;max-width:360px;margin:12px 0}
.quick-form label{font-size:.85rem;color:var(--muted)}
.quick-form input{background:#06131A;border:1px solid rgba(94,215,232,.4);border-radius:8px;padding:10px 12px;color:var(--text);font-family:var(--font-b)}
.quick-form input:focus{outline:none;border-color:var(--neon)}
.kamus-grid{display:grid;gap:10px;margin:14px 0}
.kamus-item{background:var(--grad-panel);border:1px solid rgba(94,215,232,.3);border-radius:10px;overflow:hidden}
.kamus-item summary{cursor:pointer;padding:13px 16px;font-weight:700;list-style:none;position:relative}
.kamus-item summary::-webkit-details-marker{display:none}
.kamus-item summary::after{content:"+";position:absolute;right:16px;color:var(--neon)}
.kamus-item[open] summary::after{content:"−"}
.kamus-item p{padding:0 16px 14px;color:var(--muted);font-size:.95rem}
.err-wrap{padding:70px 16px}
.err-code{font-family:var(--font-h);font-size:5rem;color:var(--neon);text-shadow:var(--glow)}
.err-wrap .btn{margin:18px 0}
.crumbs{padding:12px 0 0;font-size:.82rem;color:var(--muted)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--neon)}
.site-footer{background:var(--panel);border-top:1px solid rgba(94,215,232,.35);padding:36px 0 92px;margin-top:30px}
.foot-grid{display:grid;gap:24px;grid-template-columns:1fr}
.foot-brand p{color:var(--muted);font-size:.9rem;margin:10px 0}
.foot-col h3{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--neon);margin-bottom:8px;font-weight:700}
.foot-col a{display:block;color:var(--muted);padding:3px 0;font-size:.92rem}
.foot-col a:hover{color:var(--neon);text-decoration:none}
.pill-18{display:inline-block;border:1px solid var(--neon);color:var(--neon);border-radius:999px;padding:2px 12px;font-weight:700;font-size:.85rem}
.foot-bottom{margin-top:24px;padding-top:16px;border-top:1px solid rgba(94,215,232,.25);color:var(--muted);font-size:.85rem}
.float-cta{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(6,19,26,.92);backdrop-filter:blur(8px);border-top:1px solid rgba(94,215,232,.4)}
.float-cta-in{display:flex;align-items:center;justify-content:center;gap:12px;max-width:calc(100vw - 24px)}
.float-jackpot{font-family:var(--font-h);font-weight:700;color:var(--neon);font-size:1rem;letter-spacing:.02em;white-space:nowrap;text-shadow:0 0 10px rgba(94,215,232,.45)}
.float-cta .btn{animation:cta-blink 1.6s ease-in-out infinite}
@keyframes cta-blink{0%,100%{box-shadow:0 0 8px rgba(94,215,232,.45),0 0 18px rgba(94,215,232,.18);transform:scale(1)}50%{box-shadow:0 0 20px rgba(94,215,232,.9),0 0 36px rgba(94,215,232,.45);transform:scale(1.04)}}
@media (min-width:768px){
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .peri-wrap{flex-direction:row;flex-wrap:wrap;align-items:center;gap:36px}
  .peri-copy{flex:1;min-width:260px;text-align:left}
  .hero-cta{justify-content:flex-start}
  .gauge-card{width:300px;flex:none}
  .foot-grid{grid-template-columns:2fr 1fr 1fr 1fr}
}
@media (min-width:1024px){
  .grid-4{grid-template-columns:repeat(4,1fr)}
  .nav-desktop{display:flex}
  .header-cta{margin-left:0}
  .burger{display:none}
  .m-nav{display:none!important}
}
@media (prefers-reduced-motion:reduce){.pulse,.sonar,.bub,.float-cta .btn{animation:none}}