/* ============================================================
   SHUIERP.COM — 水产业数字底座 · 展示站
   ============================================================ */

:root{
  --bg:#030711;
  --bg-2:#050d1a;
  --panel:rgba(255,255,255,.028);
  --panel-2:rgba(255,255,255,.05);
  --line:rgba(120,180,255,.13);
  --line-2:rgba(120,180,255,.28);
  --cyan:#22d3ee;
  --blue:#3b82f6;
  --mint:#00ffc6;
  --gold:#ffcf6b;
  --txt:#e6f2ff;
  --dim:#8ba6c9;
  --dim-2:#5f789b;
  --radius:18px;
  --maxw:1240px;
  --ease:cubic-bezier(.16,.84,.28,1);
}

*{margin:0;padding:0;box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  background:var(--bg);
  color:var(--txt);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",
              -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"tnum";
}

body::before{
  content:"";position:fixed;inset:0;z-index:1;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  opacity:.035;mix-blend-mode:overlay;
}

img,svg{display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{list-style:none}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:2}
.section{position:relative;padding:130px 0;overflow:hidden}
.section-alt{background:
  radial-gradient(900px 500px at 15% 0%,rgba(34,211,238,.07),transparent 60%),
  radial-gradient(800px 500px at 90% 100%,rgba(59,130,246,.08),transparent 60%),
  var(--bg-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- 渐变文字 ---------- */
.grad{
  background:linear-gradient(100deg,var(--cyan),var(--blue) 45%,var(--mint));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.grad.warn{background:linear-gradient(100deg,#ffcf6b,#ff8a5c);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ============================================================
   LOADER
   ============================================================ */
.loader{
  position:fixed;inset:0;z-index:9999;background:#02060d;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .7s var(--ease),visibility .7s;
}
.loader.hide{opacity:0;visibility:hidden}
.loader-inner{text-align:center}
.loader-mark{display:flex;gap:4px;justify-content:center;font-weight:900;font-size:clamp(26px,5vw,54px);letter-spacing:.04em}
.loader-mark span{
  display:inline-block;opacity:0;transform:translateY(24px);
  background:linear-gradient(180deg,#fff,var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:lmIn .5s var(--ease) forwards;
}
.loader-mark span:nth-child(1){animation-delay:.05s}
.loader-mark span:nth-child(2){animation-delay:.13s}
.loader-mark span:nth-child(3){animation-delay:.21s}
.loader-mark span:nth-child(4){animation-delay:.29s}
.loader-mark span:nth-child(5){animation-delay:.37s;background:linear-gradient(180deg,#fff,var(--mint));-webkit-background-clip:text;background-clip:text}
.loader-mark span:nth-child(6){animation-delay:.45s}
.loader-mark span:nth-child(7){animation-delay:.53s}
.loader-mark span:nth-child(8){animation-delay:.61s}
@keyframes lmIn{to{opacity:1;transform:translateY(0)}}
.loader-bar{width:min(300px,60vw);height:2px;margin:26px auto 14px;background:rgba(255,255,255,.08);overflow:hidden;border-radius:2px}
.loader-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--mint));animation:lbIn 1.4s var(--ease) forwards}
@keyframes lbIn{to{width:100%}}
.loader-tip{font-size:12px;letter-spacing:.28em;color:var(--dim-2)}

/* ---------- 光标 & 滚动进度 ---------- */
.cursor-glow{
  position:fixed;top:0;left:0;width:520px;height:520px;margin:-260px 0 0 -260px;
  border-radius:50%;pointer-events:none;z-index:2;opacity:0;
  background:radial-gradient(circle,rgba(34,211,238,.10),rgba(59,130,246,.05) 40%,transparent 70%);
  transition:opacity .4s;mix-blend-mode:screen;
}
@media(hover:hover){.cursor-glow{opacity:1}}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:200;background:rgba(255,255,255,.05)}
.scroll-progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--blue),var(--mint));box-shadow:0 0 12px var(--cyan)}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:fixed;top:0;left:0;right:0;z-index:150;transition:background .4s,backdrop-filter .4s,border-color .4s;border-bottom:1px solid transparent}
.nav.solid{background:rgba(3,7,17,.78);backdrop-filter:blur(18px) saturate(160%);border-bottom-color:var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:16px 28px;display:flex;align-items:center;gap:28px}
.nav-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-drop{
  width:13px;height:13px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);
  background:linear-gradient(140deg,var(--cyan),var(--blue));box-shadow:0 0 16px rgba(34,211,238,.7);
  animation:dropPulse 3s ease-in-out infinite;
}
@keyframes dropPulse{50%{box-shadow:0 0 26px rgba(34,211,238,.95);transform:rotate(-45deg) scale(1.12)}}
.brand-txt{font-weight:800;letter-spacing:.06em;font-size:16px}
.brand-txt b{color:var(--cyan);font-weight:800}
.brand-txt em{font-style:normal;color:var(--dim-2);font-weight:600;font-size:13px}
.brand-txt.big{font-size:22px}
.nav-links{display:flex;gap:30px;margin-left:auto;font-size:14px;color:var(--dim)}
.nav-links a{position:relative;padding:6px 0;transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--cyan);transition:width .35s var(--ease)}
.nav-links a:hover{color:#fff}
.nav-links a:hover::after{width:100%}
.nav-cta{
  padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid var(--line-2);background:rgba(34,211,238,.07);
  transition:background .3s,box-shadow .3s,transform .3s;
}
.nav-cta:hover{background:rgba(34,211,238,.18);box-shadow:0 0 26px rgba(34,211,238,.32)}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle i{display:block;width:22px;height:1.5px;background:var(--txt);transition:.3s}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:120px 0 90px;overflow:hidden;isolation:isolate}
#waterCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-grid{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(rgba(120,180,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,180,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 45%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 45%,#000 20%,transparent 78%);
  animation:gridMove 22s linear infinite;
}
@keyframes gridMove{to{background-position:64px 64px,64px 64px}}
.hero-glow{position:absolute;border-radius:50%;filter:blur(90px);z-index:0;pointer-events:none}
.hero-glow.g1{width:820px;height:820px;top:-260px;left:-200px;background:radial-gradient(circle,rgba(34,211,238,.20),transparent 65%);animation:float1 16s ease-in-out infinite}
.hero-glow.g2{width:760px;height:760px;bottom:-300px;right:-220px;background:radial-gradient(circle,rgba(59,130,246,.22),transparent 65%);animation:float2 20s ease-in-out infinite}
@keyframes float1{50%{transform:translate(80px,60px) scale(1.12)}}
@keyframes float2{50%{transform:translate(-70px,-50px) scale(1.1)}}
.hero-vignette{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse at 50% 40%,transparent 30%,rgba(3,7,17,.55) 75%,#030711 100%)}

.hero-content{position:relative;z-index:5;text-align:center;width:100%;max-width:1100px;padding:0 24px}

.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 20px;border:1px solid var(--line-2);border-radius:999px;
  font-size:13px;letter-spacing:.2em;color:var(--dim);
  background:rgba(255,255,255,.03);backdrop-filter:blur(8px);
}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.7)}}

.hero-domain{
  margin:30px 0 26px;font-weight:900;line-height:1;
  font-size:clamp(2.4rem,11.5vw,9rem);letter-spacing:-.02em;
  display:flex;align-items:baseline;justify-content:center;flex-wrap:nowrap;
  position:relative;
}
.dom-www,.dom-tld{
  font-size:.36em;font-weight:700;color:var(--dim-2);letter-spacing:0;
  align-self:flex-end;padding-bottom:.22em;
}
.dom-name{
  position:relative;
  background:linear-gradient(100deg,#ffffff 0%,var(--cyan) 18%,var(--blue) 38%,#ffffff 50%,var(--mint) 68%,var(--cyan) 88%,#ffffff 100%);
  background-size:280% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shine 7s linear infinite;
}
@keyframes shine{to{background-position:280% 0}}
.dom-name::after{
  content:attr(data-text);position:absolute;left:0;top:0;z-index:-1;
  color:transparent;-webkit-text-stroke:0 transparent;
  background:none;filter:blur(26px);opacity:.85;
  text-shadow:0 0 60px rgba(34,211,238,.75),0 0 120px rgba(59,130,246,.45);
}
.hero-domain::after{
  content:"";position:absolute;left:50%;bottom:-14px;transform:translateX(-50%);
  width:min(620px,80vw);height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--mint),transparent);
  opacity:.65;
}

.hero-sub{font-size:clamp(15px,1.5vw,19px);color:#c3d8f0;max-width:760px;margin:0 auto;line-height:2}
.hero-sub b{color:var(--cyan);font-weight:700}
.hero-sub .dim{color:var(--dim);font-size:.9em}

.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:30px 0 34px}
.tag{
  padding:7px 16px;border-radius:8px;font-size:13px;color:#a9c6e6;
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:.35s var(--ease);
}
.tag:hover{border-color:var(--cyan);color:#fff;background:rgba(34,211,238,.10);transform:translateY(-3px);box-shadow:0 8px 22px rgba(34,211,238,.18)}

.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 34px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .35s var(--ease),box-shadow .35s,background .35s,border-color .35s;
  will-change:transform;
}
.btn .ico{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{
  color:#02121c;background:linear-gradient(100deg,var(--cyan),var(--mint) 60%,#7dd3fc);
  box-shadow:0 10px 34px rgba(34,211,238,.32);
}
.btn-primary:hover{box-shadow:0 16px 46px rgba(34,211,238,.52)}
.btn-ghost{border:1px solid var(--line-2);color:var(--txt);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--cyan);background:rgba(34,211,238,.10);box-shadow:0 10px 30px rgba(34,211,238,.18)}

.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin:56px auto 0;max-width:940px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
}
.stat{padding:22px 16px;background:rgba(4,10,20,.72);backdrop-filter:blur(6px);transition:background .35s}
.stat:hover{background:rgba(34,211,238,.07)}
.stat b{display:inline;font-size:clamp(22px,2.6vw,34px);font-weight:800;color:#fff;font-variant-numeric:tabular-nums}
.stat i{font-style:normal;font-size:13px;color:var(--cyan);margin-left:3px}
.stat span{display:block;font-size:12.5px;color:var(--dim);margin-top:4px;line-height:1.5}

.scroll-hint{position:absolute;left:50%;bottom:34px;transform:translateX(-50%);z-index:5;display:flex;flex-direction:column;align-items:center;gap:8px}
.mouse{width:22px;height:34px;border:1px solid var(--line-2);border-radius:12px;position:relative;display:block}
.mouse i{position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;background:var(--cyan);transform:translateX(-50%);animation:wheel 1.6s infinite}
@keyframes wheel{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}
.hint-txt{font-size:11px;letter-spacing:.24em;color:var(--dim-2)}

/* ============================================================
   SECTION HEAD
   ============================================================ */
.sec-head{max-width:860px;margin-bottom:70px;position:relative}
.sec-idx{
  display:inline-block;font-size:13px;font-weight:800;letter-spacing:.3em;color:var(--cyan);
  padding-bottom:12px;
}
.sec-idx::after{content:"";display:block;width:46px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent);margin-top:10px}
.sec-title{font-size:clamp(30px,4.6vw,58px);line-height:1.22;font-weight:800;letter-spacing:-.01em;margin-bottom:22px}
.sec-desc{font-size:clamp(14px,1.4vw,17px);color:var(--dim);line-height:2}
.sec-desc b{color:#cfe4fb;font-weight:700}

/* ============================================================
   DOMAIN VALUE
   ============================================================ */
.domain-split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}

.domain-card{
  position:relative;padding:38px 30px;border-radius:24px;overflow:hidden;
  border:1px solid var(--line-2);
  background:linear-gradient(160deg,rgba(34,211,238,.09),rgba(5,13,26,.9) 55%);
  box-shadow:0 30px 80px rgba(0,0,0,.5);
  transition:transform .5s var(--ease);
}
.domain-card:hover{transform:translateY(-6px)}
.dc-glow{position:absolute;width:400px;height:400px;top:-180px;right:-160px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.35),transparent 65%);filter:blur(50px);animation:float1 14s ease-in-out infinite}
.dc-line{position:absolute;inset:0;background-image:repeating-linear-gradient(0deg,transparent,transparent 3px,rgba(120,180,255,.045) 4px);pointer-events:none}
.dc-url{position:relative;font-weight:900;font-size:clamp(26px,3.6vw,46px);letter-spacing:-.01em;display:flex;align-items:baseline;gap:2px;flex-wrap:wrap}
.dc-url .u1,.dc-url .u3{font-size:.42em;color:var(--dim-2);font-weight:700}
.dc-url .u2{
  background:linear-gradient(100deg,#fff,var(--cyan) 30%,var(--mint) 60%,#fff);
  background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shine 6s linear infinite;
}
.dc-sub{margin-top:14px;color:#bcd6f2;font-size:15px;letter-spacing:.08em}
.dc-meta{display:flex;gap:8px;margin-top:24px;flex-wrap:wrap}
.dc-meta span{
  font-size:12px;color:var(--dim);padding:5px 12px;border-radius:6px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}

.domain-letters{display:flex;gap:8px;margin-top:22px;flex-wrap:wrap}
.dl{
  flex:1;min-width:64px;padding:14px 6px;border-radius:14px;text-align:center;
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:.4s var(--ease);cursor:default;
}
.dl:hover{transform:translateY(-8px);border-color:var(--cyan);background:rgba(34,211,238,.10);box-shadow:0 14px 34px rgba(34,211,238,.20)}
.dl b{display:block;font-size:22px;font-weight:900;color:#fff;line-height:1.2}
.dl span{display:block;font-size:10px;color:var(--dim-2);margin-top:6px;line-height:1.45;letter-spacing:.04em}
.dl.alt:hover{border-color:var(--mint);background:rgba(0,255,198,.10);box-shadow:0 14px 34px rgba(0,255,198,.18)}
.dl.sep{flex:0 0 auto;min-width:26px;padding:14px 0;border:0;background:none;
  display:flex;align-items:center;justify-content:center}
.dl.sep b{font-size:20px;color:var(--dim-2)}
.dl.sep:hover{transform:none;box-shadow:none;background:none;border:0}

.value-list{display:flex;flex-direction:column;gap:2px}
.value-list li{
  display:flex;gap:20px;padding:20px 22px;border-radius:14px;
  border:1px solid transparent;transition:.4s var(--ease);
}
.value-list li:hover{border-color:var(--line);background:rgba(255,255,255,.03);transform:translateX(8px)}
.vl-n{font-size:12px;font-weight:800;color:var(--cyan);opacity:.6;letter-spacing:.1em;padding-top:4px;flex-shrink:0}
.value-list h3{font-size:17px;font-weight:700;margin-bottom:4px}
.value-list p{font-size:14px;color:var(--dim);line-height:1.8}

/* ============================================================
   TRACKS
   ============================================================ */
.track-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.track{
  position:relative;padding:34px 28px 30px;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  transition:transform .5s var(--ease),border-color .4s,box-shadow .4s;
}
.track::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .45s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(34,211,238,.14),transparent 60%);
}
.track:hover{transform:translateY(-10px);border-color:var(--line-2);box-shadow:0 26px 60px rgba(0,0,0,.45)}
.track:hover::before{opacity:1}
.tr-ico{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-2);background:rgba(34,211,238,.08);margin-bottom:20px}
.tr-ico svg{width:30px;height:30px;fill:none;stroke:var(--cyan);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.track h3{font-size:21px;font-weight:800;margin-bottom:12px}
.track h3 em{font-style:normal;font-size:13px;color:var(--mint);margin-left:8px;font-weight:600;
  padding:3px 9px;border-radius:6px;background:rgba(0,255,198,.10);vertical-align:middle}
.track p{font-size:14.5px;color:var(--dim);line-height:1.9;min-height:82px}
.tr-list{margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}
.tr-list li{font-size:13.5px;color:var(--dim-2);padding:5px 0 5px 16px;position:relative}
.tr-list li::before{content:"";position:absolute;left:0;top:13px;width:5px;height:5px;border-radius:50%;background:var(--cyan);opacity:.6}

/* ---------- PAIN ---------- */
.pain{margin-top:70px}
.pain-head{display:flex;align-items:center;gap:20px;justify-content:center;margin-bottom:32px}
.pill{padding:9px 26px;border-radius:999px;font-size:14px;font-weight:700;letter-spacing:.1em}
.pill-bad{color:#ff9b9b;border:1px solid rgba(255,120,120,.3);background:rgba(255,90,90,.07)}
.pill-good{color:var(--mint);border:1px solid rgba(0,255,198,.32);background:rgba(0,255,198,.08);box-shadow:0 0 26px rgba(0,255,198,.15)}
.arrow svg{width:60px;height:12px;fill:none;stroke:var(--cyan);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;
  animation:arrowMove 2s ease-in-out infinite}
@keyframes arrowMove{50%{transform:translateX(8px)}}
.pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pain-col{padding:32px 30px;border-radius:20px;border:1px solid var(--line);background:rgba(255,255,255,.02)}
.pain-col.bad{background:linear-gradient(180deg,rgba(255,90,90,.05),transparent 60%)}
.pain-col.good{background:linear-gradient(180deg,rgba(0,255,198,.06),transparent 60%);border-color:rgba(0,255,198,.22)}
.pain-col h4{font-size:17px;font-weight:800;margin-bottom:16px}
.pain-col.bad h4{color:#ff9b9b}
.pain-col.good h4{color:var(--mint)}
.pain-col ul li{font-size:14.5px;color:var(--dim);padding:9px 0 9px 26px;position:relative;border-bottom:1px solid rgba(255,255,255,.04)}
.pain-col ul li:last-child{border:0}
.pain-col ul li::before{position:absolute;left:0;font-weight:800}
.pain-col.bad ul li::before{content:"×";color:#ff7a7a}
.pain-col.good ul li::before{content:"✓";color:var(--mint)}
.data-note{margin-top:36px;font-size:12px;color:var(--dim-2);text-align:center}

/* ============================================================
   LOOP
   ============================================================ */
.loop-stage{display:grid;grid-template-columns:1.15fr 1fr;gap:50px;align-items:center}
.loop-ring{position:relative;width:100%;aspect-ratio:1/1;max-width:640px;margin:0 auto}
.loop-svg{width:100%;height:100%;overflow:visible}

.orbit-base{fill:none;stroke:rgba(120,180,255,.14);stroke-width:1.5}
.orbit-dash{fill:none;stroke:rgba(34,211,238,.16);stroke-width:1;stroke-dasharray:3 9;animation:spin 40s linear infinite;transform-origin:450px 450px}
.orbit-flow{fill:none;stroke:url(#ringGrad);stroke-width:2.5;stroke-linecap:round;
  stroke-dasharray:190 1430;animation:spin 9s linear infinite;transform-origin:450px 450px;
  filter:url(#softGlow)}
.orbit-flow2{fill:none;stroke:url(#ringGrad);stroke-width:2;stroke-linecap:round;opacity:.55;
  stroke-dasharray:120 1500;stroke-dashoffset:-600;animation:spin 9s linear infinite;transform-origin:450px 450px}
@keyframes spin{to{transform:rotate(360deg)}}

.core-bg{stroke:rgba(120,180,255,.12);stroke-width:1}
.core-ring{fill:none;stroke:rgba(34,211,238,.35);stroke-width:1.5;stroke-dasharray:6 10;animation:spin 26s linear infinite reverse;transform-origin:450px 450px}
.core-ring2{fill:none;stroke:rgba(0,255,198,.20);stroke-width:1;stroke-dasharray:2 14;animation:spin 18s linear infinite;transform-origin:450px 450px}
.core-t1,.core-t2{text-anchor:middle;font-weight:900;fill:#fff;letter-spacing:.06em}
.core-t1{font-size:34px}
.core-t2{font-size:34px;fill:var(--cyan)}
.core-t3{text-anchor:middle;font-size:13px;fill:var(--dim-2);letter-spacing:.24em}

.node-bg{fill:rgba(6,16,30,.92);stroke:rgba(120,180,255,.18);stroke-width:1.5;transition:stroke .4s,fill .4s}
.node-ring{fill:none;stroke:var(--cyan);stroke-width:2;opacity:0;
  transform-box:fill-box;transform-origin:center;transition:opacity .4s}
.node-ico{fill:none;stroke:rgba(190,220,245,.75);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;transition:stroke .4s}
.node .node-ring{animation:none}
.node.active .node-bg{fill:rgba(34,211,238,.16);stroke:var(--cyan)}
.node.active .node-ring{opacity:1;animation:nodePulse 1.6s ease-out infinite}
.node.active .node-ico{stroke:#fff}
.node{cursor:pointer}
@keyframes nodePulse{0%{transform:scale(1);opacity:.9}100%{transform:scale(1.35);opacity:0}}

.loop-labels{position:absolute;inset:0}
.lb{
  position:absolute;transform:translate(-50%,-50%);
  width:clamp(112px,25%,158px);padding:9px 10px;border-radius:12px;text-align:center;
  border:1px solid var(--line);background:rgba(4,11,22,.72);backdrop-filter:blur(8px);
  transition:.4s var(--ease);
}
.lb i{display:block;font-style:normal;font-size:10px;font-weight:800;letter-spacing:.2em;color:var(--cyan);opacity:.7}
.lb b{display:block;font-size:14px;font-weight:700;margin:2px 0 2px;white-space:nowrap}
.lb span{display:block;font-size:10.5px;color:var(--dim-2);line-height:1.45;white-space:nowrap}
.lb:hover,.lb.active{border-color:var(--cyan);background:rgba(34,211,238,.12);box-shadow:0 0 30px rgba(34,211,238,.25);transform:translate(-50%,-50%) scale(1.06)}
.lb.active b{color:#fff}
.lb-1{left:50%;top:calc(17.11% - 44px)}
.lb-2{left:calc(78.48% + 38px);top:calc(33.56% - 22px)}
.lb-3{left:calc(78.48% + 38px);top:calc(66.44% + 22px)}
.lb-4{left:50%;top:calc(82.89% + 44px)}
.lb-5{left:calc(21.52% - 38px);top:calc(66.44% + 22px)}
.lb-6{left:calc(21.52% - 38px);top:calc(33.56% - 22px)}

.loop-detail{position:relative;min-height:310px}
.ld-item{
  position:absolute;inset:0;opacity:0;transform:translateY(22px);pointer-events:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  padding:32px;border-radius:20px;border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(34,211,238,.06),rgba(255,255,255,.015));
}
.ld-item.is-active{opacity:1;transform:translateY(0);pointer-events:auto;position:relative}
.ld-h{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.ld-h i{font-style:normal;font-size:12px;font-weight:800;letter-spacing:.16em;color:#02121c;
  background:linear-gradient(100deg,var(--cyan),var(--mint));padding:4px 10px;border-radius:6px}
.ld-h h3{font-size:24px;font-weight:800}
.ld-item p{font-size:15px;color:var(--dim);line-height:2}
.ld-tags{display:flex;gap:8px;margin-top:20px;flex-wrap:wrap}
.ld-tags span{font-size:12px;color:var(--cyan);padding:5px 12px;border-radius:6px;border:1px solid rgba(34,211,238,.28);background:rgba(34,211,238,.07)}

.loop-foot{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:60px}
.lf-item{padding:24px;border-radius:16px;border:1px solid var(--line);background:var(--panel);text-align:center}
.lf-item b{display:block;font-size:18px;font-weight:800;color:var(--cyan);letter-spacing:.1em;margin-bottom:8px}
.lf-item span{font-size:13.5px;color:var(--dim);line-height:1.8}

/* ============================================================
   MODULES
   ============================================================ */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.mod{
  position:relative;padding:32px 28px 34px;border-radius:18px;overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  transition:transform .45s var(--ease),border-color .4s,box-shadow .4s;
  transform-style:preserve-3d;
}
.mod::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .4s;pointer-events:none;
  background:radial-gradient(380px circle at var(--mx,50%) var(--my,50%),rgba(34,211,238,.16),transparent 62%);
}
.mod:hover{border-color:var(--line-2);box-shadow:0 24px 60px rgba(0,0,0,.45)}
.mod:hover::before{opacity:1}
.mod-n{font-size:11px;font-weight:800;letter-spacing:.2em;color:var(--dim-2)}
.mod h3{font-size:20px;font-weight:800;margin:12px 0 10px;transform:translateZ(30px)}
.mod p{font-size:14px;color:var(--dim);line-height:1.9;transform:translateZ(18px)}
.mod-line{position:absolute;left:0;bottom:0;height:2px;width:0;background:linear-gradient(90deg,var(--cyan),var(--mint));transition:width .6s var(--ease)}
.mod:hover .mod-line{width:100%}
.mod-hero{background:linear-gradient(160deg,rgba(34,211,238,.10),rgba(255,255,255,.02));border-color:rgba(34,211,238,.28)}

/* ============================================================
   TECH
   ============================================================ */
.tech-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;position:relative}
.tf-item{
  position:relative;padding:26px 24px;border-radius:16px;
  border:1px solid var(--line);background:var(--panel);overflow:hidden;
  transition:.4s var(--ease);
}
.tf-item::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--cyan),transparent);transform:scaleY(0);transform-origin:top;transition:transform .5s var(--ease);
}
.tf-item:hover{transform:translateY(-6px);border-color:var(--line-2);background:var(--panel-2)}
.tf-item:hover::after{transform:scaleY(1)}
.tf-i{display:block;font-size:11px;font-weight:800;letter-spacing:.2em;color:var(--cyan);opacity:.7;margin-bottom:10px}
.tf-item b{display:block;font-size:17px;font-weight:700;margin-bottom:6px}
.tf-item em{font-style:normal;font-size:13px;color:var(--dim);line-height:1.8}

.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.kpi{padding:28px 20px;border-radius:16px;text-align:center;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(34,211,238,.05),transparent)}
.kpi b{display:block;font-size:clamp(26px,3.4vw,40px);font-weight:900;color:#fff;font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.kpi span{font-size:13px;color:var(--dim)}

/* ============================================================
   OFFER
   ============================================================ */
.offer{position:relative;padding:150px 0;overflow:hidden;border-top:1px solid var(--line)}
.offer-bg{position:absolute;inset:0;
  background:
    radial-gradient(700px 400px at 50% 0%,rgba(34,211,238,.16),transparent 65%),
    radial-gradient(600px 400px at 20% 100%,rgba(59,130,246,.14),transparent 65%),
    radial-gradient(600px 400px at 85% 60%,rgba(0,255,198,.10),transparent 65%);
  animation:offerBreath 9s ease-in-out infinite}
@keyframes offerBreath{50%{opacity:.6;transform:scale(1.06)}}
.offer-box{
  position:relative;text-align:center;padding:64px 40px;border-radius:28px;
  border:1px solid var(--line-2);background:rgba(4,10,20,.55);backdrop-filter:blur(20px);
  box-shadow:0 40px 100px rgba(0,0,0,.5);overflow:hidden;
}
.offer-box::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,180,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(circle at 50% 30%,#000,transparent 70%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 70%)}
.offer-tag{display:inline-block;font-size:12px;letter-spacing:.28em;color:var(--gold);
  padding:7px 18px;border:1px solid rgba(255,207,107,.35);border-radius:999px;background:rgba(255,207,107,.07)}
.offer-domain{
  margin:34px 0 26px;font-weight:900;line-height:1;
  font-size:clamp(2rem,9vw,7rem);letter-spacing:-.02em;
  display:flex;align-items:baseline;justify-content:center;flex-wrap:wrap;
}
.offer-domain span{font-size:.34em;color:var(--dim-2);font-weight:700;padding:0 .06em}
.offer-domain b{
  position:relative;
  background:linear-gradient(100deg,#fff,var(--cyan) 22%,var(--blue) 42%,#fff 52%,var(--mint) 72%,var(--cyan) 92%,#fff);
  background-size:280% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shine 6s linear infinite;
}
.offer-sub{font-size:clamp(14px,1.4vw,17px);color:var(--dim);line-height:2;max-width:680px;margin:0 auto}
.offer-modes{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:44px auto 40px;max-width:900px}
.om{padding:20px 14px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.025);transition:.4s var(--ease)}
.om:hover{border-color:var(--cyan);background:rgba(34,211,238,.10);transform:translateY(-6px);box-shadow:0 14px 34px rgba(34,211,238,.16)}
.om b{display:block;font-size:16px;font-weight:700;margin-bottom:5px}
.om span{font-size:12.5px;color:var(--dim-2)}
.offer-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{border-top:1px solid var(--line);padding:56px 0 40px;background:#02060d}
.ft-top{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;padding-bottom:30px;border-bottom:1px solid var(--line)}
.ft-brand p{font-size:13px;color:var(--dim-2);margin-top:10px}
.ft-links{display:flex;gap:22px;flex-wrap:wrap;font-size:13.5px;color:var(--dim)}
.ft-links a:hover{color:var(--cyan)}
.ft-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:12px;color:var(--dim-2)}

/* ============================================================
   REVEAL
   ============================================================ */
.reveal{opacity:0;transform:translateY(44px);transition:opacity .9s var(--ease),transform .9s var(--ease);transition-delay:calc(var(--d,0) * 70ms)}
.reveal.is-in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1024px){
  .domain-split{grid-template-columns:1fr;gap:44px}
  .loop-stage{grid-template-columns:1fr;gap:40px}
  .loop-ring{max-width:620px}
  .track-row,.mod-grid,.tech-flow{grid-template-columns:1fr 1fr}
  .loop-foot{grid-template-columns:1fr}
}
@media(max-width:860px){
  .nav-links{
    position:fixed;top:64px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(3,7,17,.96);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    padding:12px 28px 22px;transform:translateY(-14px);opacity:0;pointer-events:none;transition:.35s var(--ease);
  }
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.05)}
  .nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .section{padding:90px 0}
  .hero-stats{grid-template-columns:1fr 1fr}
  .kpi-row{grid-template-columns:1fr 1fr}
  .offer-modes{grid-template-columns:1fr 1fr}
  .pain-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  .track-row,.mod-grid,.tech-flow{grid-template-columns:1fr}
  .hero-domain{flex-wrap:wrap;gap:2px}
  .hero-actions .btn{width:100%;justify-content:center}
  .domain-letters{gap:6px}
  .dl{min-width:52px;padding:12px 4px}
  .dl b{font-size:18px}
  .dl span{font-size:9px}
  /* 闭环：小屏改为纵向列表 */
  .loop-ring{max-width:100%}
  .loop-labels{display:none}
  .loop-detail{min-height:0;display:flex;flex-direction:column;gap:14px}
  .ld-item{position:relative;inset:auto;opacity:1;transform:none;pointer-events:auto;padding:24px}
  .ld-h h3{font-size:20px}
  .ft-top{flex-direction:column;align-items:flex-start}
}