/* =========================================================
   KGminer · 产品官网
   Design system: 夜班叙事 / 近黑底 + 珍珠虹彩
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root{
  --ink-0:#05060A;
  --ink-1:#080A0F;
  --ink-2:#0C0F16;
  --ink-3:#11151E;
  --line:rgba(255,255,255,.075);
  --line-strong:rgba(255,255,255,.14);
  --text:#EEF0F4;
  --muted:#9BA4B4;
  --dim:#7E879A;
  --mint:#5FE8C0;
  --ice:#9BD9FF;
  --violet:#B6A8FF;
  --pearl:#F6E7CE;
  --glow:0 0 0 1px rgba(95,232,192,.22), 0 24px 60px -24px rgba(95,232,192,.35);

  --sans:"Inter","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","SF Mono","Cascadia Mono",Consolas,"Courier New",monospace;

  --wrap:1240px;
  --pad:clamp(20px,4vw,40px);
  --sec:clamp(84px,11vw,148px);
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::after{
  content:"";position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.028;
  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)'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.028em;line-height:1.12}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0}
li{list-style:none}
::selection{background:rgba(95,232,192,.28);color:#fff}

:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:4px}
.skip{
  position:fixed;left:16px;top:-60px;z-index:10000;
  padding:10px 16px;border-radius:8px;background:var(--mint);color:#032018;font-weight:600;
  transition:top .2s var(--ease);
}
.skip:focus{top:16px}

/* ---------- 3. Utilities ---------- */
.wrap{width:min(var(--wrap),100% - var(--pad)*2);margin-inline:auto}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.mint{color:var(--mint)}
.grad{
  background:linear-gradient(100deg,var(--mint) 4%,var(--ice) 40%,var(--violet) 72%,var(--pearl) 98%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);margin-bottom:26px;
}
.eyebrow .idx{color:var(--dim)}
.eyebrow .dot{
  width:6px;height:6px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 4px rgba(95,232,192,.13);animation:dotPulse 2.6s ease-in-out infinite;
}
@keyframes dotPulse{0%,100%{box-shadow:0 0 0 4px rgba(95,232,192,.13)}50%{box-shadow:0 0 0 8px rgba(95,232,192,0)}}

/* ---------- 4. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:44px;padding:0 20px;border-radius:999px;
  font-size:14px;font-weight:600;letter-spacing:-.005em;white-space:nowrap;
  border:1px solid transparent;
  transition:transform .32s var(--ease),background .25s,color .25s,border-color .25s,box-shadow .32s;
}
.btn svg{width:16px;height:16px;transition:transform .32s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn--sm{height:36px;padding:0 16px;font-size:13px}
.btn--lg{height:52px;padding:0 28px;font-size:15px}
.btn--primary{
  background:linear-gradient(180deg,#FAF7F0,#E7E1D5);
  color:#0A0D12;
  box-shadow:0 10px 30px -14px rgba(246,231,206,.55), inset 0 1px 0 #fff;
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -14px rgba(246,231,206,.6), inset 0 1px 0 #fff}
.btn--ghost{
  background:rgba(255,255,255,.03);color:var(--text);border-color:var(--line-strong);
  backdrop-filter:blur(8px);
}
.btn--ghost:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.26);transform:translateY(-2px)}

/* ---------- 5. Nav ---------- */
.nav{
  position:fixed;inset:0 0 auto;z-index:900;
  transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  background:rgba(6,8,12,.72);
  border-bottom-color:var(--line);
  backdrop-filter:blur(18px) saturate(150%);
}
.nav__inner{
  width:min(var(--wrap),100% - var(--pad)*2);margin-inline:auto;
  height:72px;display:flex;align-items:center;gap:32px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand__mark{width:26px;height:26px;display:block;filter:drop-shadow(0 0 14px rgba(95,232,192,.35))}
.brand__mark svg{width:100%;height:100%}
.brand__type{font-size:16px;font-weight:600;letter-spacing:.01em}
.nav__links{display:flex;gap:28px;margin-left:auto}
.nav__links a{
  position:relative;font-size:13.5px;color:var(--muted);padding:6px 0;
  transition:color .25s;
}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--mint),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.nav__links a:hover{color:var(--text)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__actions{display:flex;align-items:center;gap:10px;margin-left:12px}
.nav__toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong)}
.nav__toggle span{display:block;width:16px;height:1.5px;background:var(--text);margin:4px auto;transition:transform .3s var(--ease),opacity .2s}
.nav__toggle[aria-expanded="true"] span:first-child{transform:translateY(5.5px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:last-child{transform:translateY(-5.5px) rotate(-45deg)}

.mobile-menu{
  display:none;flex-direction:column;gap:2px;
  padding:8px var(--pad) 22px;
  max-height:calc(100vh - 72px);max-height:calc(100svh - 72px);overflow-y:auto;
  background:rgba(6,8,12,.96);border-bottom:1px solid var(--line);
  backdrop-filter:blur(18px);
}
.mobile-menu a{padding:14px 4px;border-bottom:1px solid var(--line);font-size:15px;color:var(--muted)}
.mobile-menu a:last-child{border-bottom:0}

/* ---------- 6. Hero ---------- */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;
  padding:150px 0 110px;overflow:hidden;
  isolation:isolate;
}
.hero__bg{position:absolute;inset:0;z-index:-1;overflow:hidden;background:radial-gradient(120% 90% at 62% 28%,#0B1018 0%,#070910 52%,#05060A 100%)}
/* CSS 机房场景 */
.scene{position:absolute;inset:0}
.scene__glow{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none}
.scene__glow--mint{
  width:46vw;height:46vw;right:2%;top:4%;
  background:radial-gradient(closest-side,rgba(95,232,192,.38),rgba(95,232,192,0) 70%);
  animation:glowBreath 12s ease-in-out infinite;
}
.scene__glow--violet{
  width:38vw;height:38vw;right:24%;bottom:-6%;
  background:radial-gradient(closest-side,rgba(155,217,255,.26),rgba(182,168,255,0) 72%);
  animation:glowBreath 15s 1.4s ease-in-out infinite;
}
@keyframes glowBreath{0%,100%{opacity:.72;transform:scale(1)}50%{opacity:1;transform:scale(1.08)}}
.scene__horizon{
  position:absolute;left:0;right:0;top:54%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(155,217,255,.35),rgba(95,232,192,.28),transparent);
  box-shadow:0 0 60px 12px rgba(95,232,192,.14);
  opacity:.55;
}
.scene__floor{
  position:absolute;left:-30%;right:-30%;bottom:-14%;height:74%;
  transform:perspective(700px) rotateX(64deg);
  transform-origin:50% 100%;
  background-image:
    linear-gradient(rgba(155,217,255,.18) 1px,transparent 1px),
    linear-gradient(90deg,rgba(95,232,192,.13) 1px,transparent 1px);
  background-size:112px 112px;
  mask-image:linear-gradient(to top,#000 0%,rgba(0,0,0,.55) 42%,transparent 80%);
  -webkit-mask-image:linear-gradient(to top,#000 0%,rgba(0,0,0,.55) 42%,transparent 80%);
  opacity:.6;
}
.scene__rows{position:absolute;left:0;right:0;bottom:8%;height:56%;pointer-events:none}
.scene__rows i{
  position:absolute;left:50%;bottom:calc(var(--y) * 46px);
  width:calc(30% + var(--y) * 46%);
  height:2px;border-radius:2px;transform:translateX(-50%);
  background:linear-gradient(90deg,transparent,rgba(95,232,192,.55) 22%,rgba(200,240,255,.75) 50%,rgba(155,217,255,.5) 78%,transparent);
  filter:blur(.8px);
  opacity:calc(.55 - var(--y) * .08);
  animation:rowPulse 6s calc(var(--y) * -1.1s) ease-in-out infinite;
}
@keyframes rowPulse{0%,100%{opacity:calc(.22 + var(--y) * .02)}50%{opacity:calc(.6 - var(--y) * .07)}}
.hero__veil{
  position:absolute;inset:0;
  background:
    radial-gradient(105% 80% at 14% 42%,rgba(5,6,10,.93) 0%,rgba(5,6,10,.6) 44%,rgba(5,6,10,.18) 72%,rgba(5,6,10,.82) 100%),
    linear-gradient(180deg,rgba(5,6,10,.9) 0%,rgba(5,6,10,.34) 36%,rgba(5,6,10,.66) 76%,var(--ink-0) 100%);
}
.hero__grid{
  position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(120% 90% at 30% 40%,#000 10%,transparent 76%);
  -webkit-mask-image:radial-gradient(120% 90% at 30% 40%,#000 10%,transparent 76%);
}
.hero__inner{position:relative;z-index:2;max-width:680px}
.hero__title{
  font-size:clamp(42px,5.4vw,80px);
  line-height:1.04;letter-spacing:-.045em;margin-bottom:28px;
}
.hero__lead{
  max-width:520px;font-size:clamp(15px,1.15vw,17px);line-height:1.85;color:var(--muted);
}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.hero__stats{
  display:grid;grid-template-columns:repeat(4,auto);gap:0;
  margin-top:62px;padding-top:26px;border-top:1px solid var(--line);
}
.hero__stats > div{padding-right:clamp(18px,2.6vw,38px);margin-right:clamp(18px,2.6vw,38px);border-right:1px solid var(--line)}
.hero__stats > div:last-child{border-right:0;margin-right:0;padding-right:0}
.hero__stats dt{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.hero__stats dd{display:flex;align-items:baseline;gap:5px;font-size:13px;color:var(--muted)}
.hero__stats dd b{font-size:26px;font-weight:500;letter-spacing:-.03em;color:var(--text);font-variant-numeric:tabular-nums;line-height:1}
.hero__stats dd i{font-style:normal;font-size:11px;color:var(--dim)}

/* HUD */
.hero__hud{
  position:absolute;z-index:2;
  right:max(6vw,calc((100vw - var(--wrap))/2));
  top:52%;transform:translateY(-50%);
  width:330px;
}
.hud{
  background:linear-gradient(165deg,rgba(18,23,32,.94),rgba(9,12,18,.96));
  border:1px solid var(--line-strong);border-radius:18px;
  box-shadow:0 40px 90px -40px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(16px);
}
.hud--main{padding:20px 20px 16px;animation:floatA 9s ease-in-out infinite}
@keyframes floatA{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hud__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.hud__tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
}
.hud__code{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:.1em}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 10px var(--mint);animation:dotPulse 2s infinite}
.pulse--violet{background:var(--violet);box-shadow:0 0 10px var(--violet)}
.pulse--pearl{background:var(--pearl);box-shadow:0 0 10px var(--pearl)}
.hud__rows{display:grid;gap:11px;margin-bottom:18px}
.hud__row{display:flex;align-items:baseline;justify-content:space-between;font-size:12.5px;color:var(--dim)}
.hud__row b{font-weight:500;color:var(--text);font-variant-numeric:tabular-nums;font-family:var(--mono);font-size:13px}
.hud__spark svg{width:100%;height:58px;display:block}
.spark-line{stroke-dasharray:320;stroke-dashoffset:320;animation:draw 2.4s .5s var(--ease) forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.hud__foot{
  display:flex;align-items:baseline;justify-content:space-between;
  margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
  font-size:12px;color:var(--muted);
}
.hud__foot b{font-family:var(--mono);font-size:18px;font-weight:500;color:var(--pearl);letter-spacing:-.02em}
.hud--mini{position:absolute;padding:12px 14px;border-radius:12px;width:max-content}
.hud--mini p{margin-top:6px;font-size:11.5px;color:var(--muted)}
.hud--a{top:-34px;left:-46px;animation:floatB 7s ease-in-out infinite}
.hud--b{bottom:-32px;right:-30px;animation:floatB 8.5s .8s ease-in-out infinite}
@keyframes floatB{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}
.hero__foot{
  position:absolute;left:50%;transform:translateX(-50%);bottom:26px;
  display:flex;align-items:center;gap:14px;width:min(var(--wrap),100% - var(--pad)*2);
}
.hero__line{flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}

/* ---------- 7. Section frame ---------- */
.section{position:relative;padding:var(--sec) 0}
.section--panel{
  background:linear-gradient(180deg,var(--ink-1),#070910 55%,var(--ink-1));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.shead{max-width:820px;margin-bottom:clamp(48px,6vw,84px)}
.shead__title{font-size:clamp(30px,3.9vw,54px);letter-spacing:-.038em;line-height:1.12}
.shead__lead{margin-top:24px;font-size:clamp(14.5px,1.1vw,16.5px);line-height:1.85;color:var(--muted);max-width:600px}
.shead--split{
  max-width:none;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(32px,5vw,80px);
  align-items:end;
}
.shead--split .shead__lead{margin-top:0;padding-bottom:6px}

/* 定义段（KGMiner 是什么） */
.section--intro{padding-top:clamp(56px,6vw,84px);padding-bottom:clamp(28px,3vw,44px)}
.intro{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,76px);align-items:start}
.intro__title{font-size:clamp(22px,2.5vw,34px);letter-spacing:-.03em;line-height:1.26;color:#E6EAF0}
.intro__body{display:grid;gap:18px;padding-top:4px}
.intro__body p{font-size:14.5px;line-height:1.9;color:var(--muted);max-width:640px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.chips li{
  font-size:12px;letter-spacing:.02em;color:#B3BBC9;
  padding:7px 13px;border:1px solid var(--line);border-radius:999px;
  background:rgba(255,255,255,.02);
}

/* ---------- 8. Compare ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border-top:1px solid var(--line);
}
.compare__col{padding:38px clamp(0px,3vw,44px) 8px;border-right:1px solid var(--line)}
.compare__col:first-child{padding-left:0}
.compare__col:last-child{border-right:0;padding-right:0}
.compare__label{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:30px;color:var(--dim)}
.compare__col--new .compare__label{color:var(--mint)}
.compare__list{display:grid;gap:0}
.compare__list li{
  display:grid;grid-template-columns:34px 1fr;gap:14px;
  padding:20px 0;border-top:1px solid var(--line);
  font-size:14.5px;line-height:1.75;
}
.compare__col--old .compare__list li{color:var(--dim);font-size:14px}
.compare__list li span{font-family:var(--mono);font-size:11px;color:var(--dim);padding-top:5px}
.compare__col--new .compare__list li{color:#DCE0E7}
.compare__col--new .compare__list li span{color:var(--mint)}

/* ---------- 9. Modes ---------- */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.mode{
  display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.008));
  transition:border-color .4s var(--ease),transform .5s var(--ease);
}
.mode:hover{border-color:rgba(255,255,255,.18);transform:translateY(-4px)}
.mode--primary{border-color:rgba(95,232,192,.24);box-shadow:0 40px 90px -60px rgba(95,232,192,.55)}

/* screen mock */
.mode__screen{padding:26px 26px 0;background:linear-gradient(180deg,rgba(95,232,192,.05),transparent 70%)}
.screen{
  border-radius:12px 12px 0 0;overflow:hidden;
  border:1px solid rgba(255,255,255,.12);border-bottom:0;
  background:linear-gradient(150deg,#151A24,#0B0E15 70%);
  box-shadow:0 -1px 0 rgba(255,255,255,.06) inset;
}
.screen__bar{
  display:flex;align-items:center;gap:6px;padding:9px 12px;
  border-bottom:1px solid rgba(255,255,255,.07);
  font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;color:var(--dim)
}
.screen__bar i{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.16)}
.screen__bar span{margin-left:auto}
.screen__body{position:relative;padding:24px 22px 26px;display:flex;justify-content:center}
.screen__card{
  width:min(100%,300px);padding:24px 22px;border-radius:12px;
  background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.08);
  text-align:center;backdrop-filter:blur(4px);
}
.screen__hello{font-size:15px;letter-spacing:.12em;color:var(--text);margin-bottom:18px}
.screen__input{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  height:40px;padding:0 12px;border-radius:8px;
  border:1px solid rgba(255,255,255,.14);background:rgba(0,0,0,.32);
  font-size:11px;color:var(--dim);text-align:left;
}
.caret{width:1px;height:14px;background:var(--mint);animation:blink 1.1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
.screen__btn{
  margin-top:10px;height:40px;display:grid;place-items:center;border-radius:8px;
  background:linear-gradient(180deg,#EDE8DC,#C9C2B2);color:#12151B;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
}
.screen__hint{margin-top:14px;font-size:10px;color:var(--dim)}
.screen__badge{
  position:absolute;right:12px;bottom:10px;
  font-family:var(--mono);font-size:8.5px;letter-spacing:.18em;color:rgba(95,232,192,.55);
  border:1px solid rgba(95,232,192,.2);border-radius:4px;padding:3px 6px;
}

/* ai viz */
.mode__viz{
  padding:26px 26px 0;min-height:238px;display:grid;place-items:center;
  background:radial-gradient(80% 80% at 50% 0%,rgba(182,168,255,.08),transparent 70%);
}
.ai{width:100%;max-width:360px;display:grid;gap:22px}
.ai__ring{position:relative;width:74px;height:74px;margin-inline:auto;display:grid;place-items:center}
.ai__ring::before,.ai__ring::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(182,168,255,.4);
  animation:ring 4s linear infinite;
}
.ai__ring::after{inset:10px;border-color:rgba(95,232,192,.35);animation-duration:6s;animation-direction:reverse}
@keyframes ring{to{transform:rotate(360deg)}}
.ai__core{
  font-family:var(--mono);font-size:15px;letter-spacing:.06em;color:var(--ice);
  text-shadow:0 0 18px rgba(155,217,255,.6);
}
.ai__bars{display:grid;gap:9px}
.ai__bar{display:grid;grid-template-columns:64px 1fr 42px;align-items:center;gap:10px;font-size:10.5px;color:var(--dim)}
.ai__bar i{
  display:block;height:3px;border-radius:2px;
  background:linear-gradient(90deg,var(--mint),var(--ice));
  width:var(--w);opacity:.85;
}
.ai__bar em{font-style:normal;font-family:var(--mono);font-size:9.5px;color:var(--muted);text-align:right}

.mode__body{padding:28px 30px 34px}
.mode__tag{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--dim);text-transform:uppercase;margin-bottom:12px}
.mode__body h3{font-size:clamp(21px,1.8vw,26px);margin-bottom:14px}
.mode__desc{font-size:14.5px;line-height:1.85;color:var(--muted)}
.ticks{margin-top:20px;display:grid;gap:9px}
.ticks li{position:relative;padding-left:20px;font-size:13px;color:#C7CCD6}
.ticks li::before{
  content:"";position:absolute;left:0;top:8px;width:8px;height:8px;
  border-left:1.4px solid var(--mint);border-bottom:1.4px solid var(--mint);
  transform:rotate(-45deg);border-radius:1px;
}

/* ---------- 10. Capabilities ---------- */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px}
.cap{
  padding:30px 0 34px;border-top:1px solid var(--line);
  transition:border-color .4s var(--ease);
}
.cap__no{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--dim);display:block;margin-bottom:22px}
.cap h3{font-size:18.5px;margin-bottom:12px;letter-spacing:-.02em}
.cap p{font-size:13.8px;line-height:1.8;color:var(--muted)}
.cap:hover{border-top-color:rgba(95,232,192,.45)}
.cap:hover .cap__no{color:var(--mint)}

/* ---------- 12. Steps ---------- */
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px;
  counter-reset:step;border-top:1px solid var(--line);padding-top:0;
}
.step{position:relative;padding:38px 0 0}
.step::before{
  content:"";position:absolute;top:-1px;left:0;width:0;height:1px;background:var(--mint);
  transition:width .9s var(--ease);
}
.step:hover::before{width:100%}
.step__no{
  font-family:var(--mono);font-size:44px;line-height:1;font-weight:400;letter-spacing:-.04em;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.22);
  display:block;margin-bottom:22px;
}
.step h3{font-size:19px;margin-bottom:12px}
.step p{font-size:13.8px;line-height:1.8;color:var(--muted)}
.step__meta{margin-top:18px;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--mint);text-transform:uppercase}

.deploy__note{
  margin-top:clamp(48px,6vw,74px);padding:clamp(24px,3vw,36px);
  border:1px solid var(--line);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:linear-gradient(90deg,rgba(255,255,255,.03),rgba(255,255,255,0));
}
.deploy__note h4{font-size:16px;margin-bottom:8px}
.deploy__note p{font-size:13.5px;color:var(--muted);max-width:520px}
.deploy__chips{display:flex;flex-wrap:wrap;gap:8px}
.deploy__chips span{
  padding:7px 13px;border-radius:999px;border:1px solid var(--line-strong);
  font-size:11.5px;color:var(--muted);background:rgba(255,255,255,.02);
}

/* ---------- 14. Safety ---------- */
.safety{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(36px,6vw,90px);align-items:start}
.safety__copy .shead__lead{max-width:440px}
.safety__list{display:grid;gap:0;border-top:1px solid var(--line)}
.safety__list li{padding:26px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:minmax(0,1fr);gap:8px}
.safety__list h4{font-size:16px;letter-spacing:-.015em}
.safety__list p{font-size:13.5px;line-height:1.8;color:var(--muted);max-width:520px}
.specs{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px;
  margin-top:clamp(46px,6vw,80px);border-top:1px solid var(--line);
}
.spec{padding:22px 0;border-bottom:1px solid var(--line)}
.spec span{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.spec b{font-size:13.5px;font-weight:500;color:#D9DEE6}

/* 风险提示 */
.risk{
  display:grid;grid-template-columns:auto 1fr;gap:14px 22px;align-items:start;
  margin-top:clamp(26px,4vw,42px);padding:22px 24px;
  border:1px solid rgba(233,200,155,.20);border-radius:var(--r-md);
  background:linear-gradient(180deg,rgba(233,200,155,.06),rgba(233,200,155,.015));
}
.risk__tag{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;white-space:nowrap;
  color:#E9C89B;border:1px solid rgba(233,200,155,.38);border-radius:999px;padding:4px 10px;
}
.risk p{font-size:13px;line-height:1.85;color:#B7BECB}
.risk b{color:#EBCBA0;font-weight:600}

/* ---------- 15. FAQ ---------- */
.section--faq{border-top:1px solid var(--line)}
.faq__grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(36px,6vw,90px);align-items:start}
.faq__grid header{position:sticky;top:110px}
.faq__grid .shead__lead{max-width:380px;margin-top:22px}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 2px;cursor:pointer;list-style:none;
  font-size:15.5px;font-weight:500;letter-spacing:-.012em;color:#E4E7ED;
  transition:color .25s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--mint)}
.faq summary::after{
  content:"";flex:none;width:11px;height:11px;margin-right:4px;
  border-right:1.4px solid var(--dim);border-bottom:1.4px solid var(--dim);
  transform:rotate(45deg) translateY(-3px);transition:transform .35s var(--ease),border-color .25s;
}
.faq details[open] summary::after{transform:rotate(225deg) translateY(-3px);border-color:var(--mint)}
.faq details[open] summary{color:#fff}
.faq__body{padding:0 40px 26px 2px;font-size:13.8px;line-height:1.9;color:var(--muted);animation:fadeIn .4s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 16. Final CTA ---------- */
.cta-final{
  position:relative;overflow:hidden;text-align:center;
  padding:clamp(100px,13vw,170px) 0;
  border-top:1px solid var(--line);
}
.cta-final__glow{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(1000px,110vw);height:min(720px,80vw);pointer-events:none;
  background:radial-gradient(closest-side,rgba(95,232,192,.16),rgba(155,217,255,.07) 45%,transparent 72%);
  filter:blur(12px);
}
.cta-final__inner{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
.cta-final h2{font-size:clamp(34px,5.2vw,68px);letter-spacing:-.045em;line-height:1.1}
.cta-final__lead{margin-top:24px;max-width:540px;font-size:15px;line-height:1.85;color:var(--muted)}
.cta-final__actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:36px}
.cta-final__meta{margin-top:40px;font-size:11.5px;color:var(--dim);letter-spacing:.02em}

/* ---------- 17. Footer ---------- */
.footer{border-top:1px solid var(--line);background:var(--ink-1);padding:64px 0 30px}
.footer__inner{display:flex;justify-content:space-between;gap:60px;flex-wrap:wrap}
.footer__brand{max-width:340px}
.footer__brand p{margin-top:18px;font-size:13px;line-height:1.8;color:var(--dim)}
.footer__links{display:flex;gap:clamp(30px,6vw,80px)}
.footer__links h4{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin-bottom:18px;font-weight:400}
.footer__links a{display:block;font-size:13.5px;color:var(--muted);padding:6px 0;transition:color .25s}
.footer__links a:hover{color:var(--mint)}
.footer__bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  font-size:11.5px;color:var(--dim);
}
.footer__disc{max-width:520px;line-height:1.7}

/* ---------- 18. Reveal ---------- */
[data-reveal]{
  opacity:0;transform:translateY(22px);
  transition:opacity .9s var(--ease),transform .9s var(--ease);
  transition-delay:calc(var(--d,0) * 90ms);
}
[data-reveal].is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
}

/* ---------- 19. Responsive ---------- */
@media (max-width:1180px){
  .hero__hud{width:300px;right:4vw}
}
@media (max-width:1080px){
  .hero__hud{display:none}
  .hero__inner{max-width:760px}
  .nav__links{gap:20px}
  .caps{gap:0 28px}
  .steps{gap:0 30px}
}
@media (max-width:920px){
  .shead--split{grid-template-columns:1fr;align-items:start;gap:22px}
  .shead--split .shead__lead{margin-top:0}
  .intro{grid-template-columns:1fr;gap:20px}
  .compare{grid-template-columns:1fr}
  .compare__col{border-right:0;padding-inline:0;border-bottom:1px solid var(--line);padding-bottom:34px}
  .compare__col:last-child{border-bottom:0;padding-top:34px}
  .mode-grid{grid-template-columns:1fr}
  .caps{grid-template-columns:1fr 1fr}
  .calc{grid-template-columns:1fr}
  .calc__form{border-right:0;border-bottom:1px solid var(--line)}
  .steps{grid-template-columns:1fr;gap:0}
  .step{padding:30px 0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .step__no{font-size:32px;margin-bottom:14px}
  .settle{grid-template-columns:1fr}
  .safety{grid-template-columns:1fr}
  .specs{grid-template-columns:1fr 1fr}
  .faq__grid{grid-template-columns:1fr}
  .faq__grid header{position:static}
}
@media (max-width:760px){
  .nav__links{display:none}
  .nav__toggle{display:block}
  .nav__actions{margin-left:auto;gap:8px}
  .nav__actions .btn--ghost{display:none}
  .mobile-menu.is-open{display:flex}
  .hero{min-height:auto;padding:130px 0 90px}
  .hero__stats{grid-template-columns:1fr 1fr;gap:18px;margin-top:44px}
  .hero__stats > div{border-right:0;margin-right:0;padding-right:0;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .hero__stats > div:nth-child(3),.hero__stats > div:nth-child(4){border-bottom:0;padding-bottom:0}
  .hero__foot{display:none}
  .caps{grid-template-columns:1fr}
  .cap{padding:24px 0}
  .risk{grid-template-columns:1fr;gap:12px;padding:20px}
  .footer__links{flex-wrap:wrap;gap:30px 44px}
  .footer__bottom{flex-direction:column;gap:10px}
}
@media (max-width:520px){
  .btn--lg{height:48px;padding:0 22px;font-size:14px}
  .hero__cta{flex-direction:column;align-items:stretch}
  .hero__cta .btn{width:100%}
  .specs{grid-template-columns:1fr}
  .deploy__note{flex-direction:column;align-items:flex-start}
}

/* ---------- 20. Sub pages ---------- */
.subhero{
  position:relative;overflow:hidden;
  padding:152px 0 clamp(58px,7vw,92px);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(85% 120% at 82% -10%,rgba(95,232,192,.13),transparent 60%),
    radial-gradient(70% 100% at 4% 0%,rgba(155,217,255,.08),transparent 62%),
    linear-gradient(180deg,#070A11,#05060A);
}
.subhero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(90% 80% at 70% 0%,#000 5%,transparent 72%);
  -webkit-mask-image:radial-gradient(90% 80% at 70% 0%,#000 5%,transparent 72%);
}
.subhero .wrap{position:relative;z-index:1}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--dim);margin-bottom:32px;
}
.crumb a{color:var(--muted);transition:color .25s}
.crumb a:hover{color:var(--mint)}
.crumb i{font-style:normal;color:rgba(255,255,255,.2)}
.subhero h1{
  font-size:clamp(32px,4.4vw,60px);line-height:1.1;letter-spacing:-.042em;
  margin-bottom:24px;max-width:920px;
}
.subhero__lead{max-width:680px;font-size:clamp(14.5px,1.1vw,16.5px);line-height:1.9;color:var(--muted)}
.subhero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.subhero .chips{margin-top:34px}

.guide{display:grid;grid-template-columns:212px 1fr;gap:clamp(30px,5vw,72px);align-items:start}
.toc{position:sticky;top:104px;display:grid;gap:2px}
.toc__title{
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);margin-bottom:10px;
}
.toc a{
  font-size:13px;line-height:1.55;color:var(--muted);
  padding:7px 0 7px 13px;border-left:1px solid var(--line);
  transition:color .25s,border-color .25s;
}
.toc a:hover{color:var(--text);border-left-color:var(--mint)}

.prose{max-width:780px;min-width:0}
.prose h2{
  font-size:clamp(21px,2.4vw,29px);letter-spacing:-.03em;line-height:1.25;
  margin:clamp(42px,5vw,60px) 0 16px;scroll-margin-top:104px;
}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:15.5px;margin-bottom:7px;color:#E6EAF0}
.prose p{font-size:15px;line-height:1.95;color:var(--muted);margin-bottom:16px}
.prose a{color:var(--mint);border-bottom:1px solid rgba(95,232,192,.32)}
.prose b,.prose strong{color:#E6EAF0;font-weight:600}
.prose .ul{display:grid;gap:9px;margin:0 0 20px}
.prose .ul li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.85;color:var(--muted)}
.prose .ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;border-radius:50%;
  background:var(--mint);opacity:.75;
}

.points{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:26px 0 30px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.points li{background:var(--ink-1);padding:24px 22px}
.points li h3{font-size:15px;margin-bottom:8px;color:#EDF0F5}
.points li p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0}

.tbl{width:100%;border-collapse:collapse;margin:24px 0 28px;font-size:13.5px}
.tbl th,.tbl td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--dim);font-weight:500;border-bottom-color:var(--line-strong);
}
.tbl td{color:var(--muted);line-height:1.75}
.tbl td:first-child{color:#DDE2EA;white-space:nowrap}
.tbl tr:last-child td{border-bottom:0}

.note{
  display:flex;gap:14px;margin:24px 0 28px;padding:18px 20px;
  border-left:2px solid var(--mint);border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(95,232,192,.045);
  font-size:13.5px;line-height:1.85;color:#B7BECB;
}
.note b{color:var(--mint)}
.note--warn{border-left-color:#E9C89B;background:rgba(233,200,155,.055)}
.note--warn b{color:#EBCBA0}

.section--related{
  border-top:1px solid var(--line);
  padding-top:clamp(56px,7vw,84px);padding-bottom:clamp(56px,7vw,84px);
}
.related{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:28px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.related a{display:flex;flex-direction:column;background:var(--ink-1);padding:24px 22px;transition:background .3s var(--ease)}
.related a:hover{background:var(--ink-2)}
.related span{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.related h3{font-size:15px;margin:11px 0 8px;color:#E8ECF2}
.related p{font-size:13px;line-height:1.8;color:var(--muted)}
.related em{margin-top:auto;padding-top:16px;font-style:normal;font-size:12px;color:var(--mint)}

@media (max-width:920px){
  .guide{grid-template-columns:1fr}
  .toc{position:static;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:6px}
  .toc__title{width:100%;margin-bottom:2px}
  .toc a{border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:12px}
  .related{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .subhero{padding:118px 0 54px}
  .subhero__actions .btn{width:100%}
  .subhero__actions{flex-direction:column;align-items:stretch}
  .points{grid-template-columns:1fr}
  .related{grid-template-columns:1fr}
  .tbl{display:block;overflow-x:auto;white-space:nowrap}
  .tbl td:first-child{white-space:normal}
}