/* ============================================================
   山海 · Rust 生存服官网样式
   视觉：墨蓝夜色 + 青玉微光 + 鎏金高光（山海意象 × 硬核生存）
   动效：纯 CSS + Canvas，零外部依赖
   ============================================================ */

:root{
  --ink:#06080b;
  --ink-2:#0a0e13;
  --panel:rgba(17,23,30,.74);
  --panel-2:rgba(23,30,39,.78);
  --line:rgba(150,190,200,.10);
  --line-2:rgba(160,200,210,.20);
  --txt:#e6eef2;
  --dim:#93a3ad;
  --dim2:#67757f;
  --jade:#2fd6a8;
  --jade-d:#0f8f70;
  --gold:#f0b429;
  --gold-2:#ffd569;
  --gold-3:#ffe9a8;
  --ember:#ff6a1f;
  --qq:#12b7f5;
  --ok:#43d17a;
  --r:16px;
  --rl:22px;
  --sh:0 26px 64px -24px rgba(0,0,0,.9);
  --fd:"Songti SC","STSong","SimSun","Noto Serif SC",Georgia,serif;
  --fb:"Segoe UI","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  --fm:"JetBrains Mono","Cascadia Mono",Consolas,Menlo,monospace;
  --max:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink);
  color:var(--txt);
  font-family:var(--fb);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(1000px 600px at 80% -10%, rgba(240,180,41,.13), transparent 60%),
    radial-gradient(900px 560px at 12% 4%, rgba(47,214,168,.11), transparent 62%),
    radial-gradient(1200px 700px at 50% 110%, rgba(255,106,31,.07), transparent 65%),
    linear-gradient(180deg,#06080b 0%,#080c11 40%,#06080b 100%);
}

#bgFx{
  position:fixed;inset:0;
  z-index:-1;
  width:100%;height:100%;
  opacity:.5;
  pointer-events:none;
}
.grain{
  position:fixed;inset:0;
  z-index:0;
  pointer-events:none;
  background:radial-gradient(130% 95% at 50% 38%, transparent 52%, rgba(0,0,0,.6) 100%);
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
code{font-family:var(--fm)}
kbd{
  font-family:var(--fm);font-size:.82em;
  padding:.14em .45em;
  border:1px solid var(--line-2);
  border-bottom-width:2px;
  border-radius:6px;
  background:rgba(255,255,255,.05);
}

/* ===================== 顶栏 ===================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;gap:18px;
  padding:14px max(20px,4vw);
  border-bottom:1px solid transparent;
  transition:background .35s,backdrop-filter .35s,border-color .35s,padding .35s;
}
.nav.stuck{
  background:rgba(6,8,11,.84);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
  padding-top:10px;padding-bottom:10px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-seal{
  display:grid;place-items:center;
  width:46px;height:46px;flex:0 0 auto;
  border-radius:12px;
  font-family:var(--fd);
  font-size:17px;
  font-weight:700;
  letter-spacing:1px;
  color:#1a1204;
  background:linear-gradient(140deg,var(--gold-3),var(--gold) 55%,#c98a06);
  box-shadow:0 0 0 1px rgba(255,255,255,.2) inset, 0 10px 26px -12px rgba(240,180,41,.7);
}
.brand-seal.sm{width:38px;height:38px;font-size:14px;border-radius:10px}
.brand-text{font-family:var(--fd);font-size:18px;letter-spacing:2.4px;line-height:1;font-weight:700}
.brand-text em{
  display:block;font-style:normal;font-family:var(--fb);
  font-size:10px;letter-spacing:2.6px;color:var(--dim2);margin-top:6px;font-weight:400;
}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14.5px;color:var(--dim)}
.nav-links a{position:relative;padding:4px 0;transition:color .25s}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--jade),var(--gold));
  transition:right .3s cubic-bezier(.4,0,.2,1);
}
.nav-links a:hover{color:var(--txt)}
.nav-links a:hover::after{right:0}
.nav-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.live{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;padding:6px 12px;border-radius:999px;
  color:var(--jade);background:rgba(47,214,168,.09);
  border:1px solid rgba(47,214,168,.28);
}
.live i{width:7px;height:7px;border-radius:50%;background:var(--jade);animation:pulse 2s infinite}
.live b{font-weight:700;display:inline-block;min-width:1.2em;text-align:center}
.live b.bump{animation:bump .5s cubic-bezier(.34,1.4,.5,1)}

@keyframes bump{
  0%{transform:scale(1);color:var(--txt)}
  35%{transform:scale(1.45);color:var(--gold-2)}
  100%{transform:scale(1);color:var(--txt)}
}

/* ===================== 按钮 ===================== */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 22px;
  border:1px solid var(--line-2);
  border-radius:12px;
  background:rgba(255,255,255,.04);
  color:var(--txt);
  font-family:var(--fb);font-size:15px;font-weight:600;
  cursor:pointer;overflow:hidden;
  transition:transform .18s, border-color .25s, background .25s, box-shadow .3s;
  -webkit-tap-highlight-color:transparent;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.985)}
.btn .ico{width:18px;height:18px;fill:currentColor;flex:0 0 auto}
.btn-sm{padding:10px 16px;font-size:13.5px}
.btn-block{width:100%}

.btn-gold{
  color:#1a1204;
  border-color:transparent;
  background:linear-gradient(140deg,var(--gold-3),var(--gold) 58%,#d99705);
  box-shadow:0 12px 30px -14px rgba(240,180,41,.75), 0 0 0 1px rgba(255,255,255,.18) inset;
}
.btn-gold:hover{box-shadow:0 16px 40px -12px rgba(240,180,41,.9), 0 0 0 1px rgba(255,255,255,.26) inset}

.btn-line{color:var(--dim);background:rgba(255,255,255,.03)}
.btn-line:hover{color:var(--txt);border-color:var(--jade);background:rgba(47,214,168,.09)}

.btn-qqline{color:var(--qq);border-color:rgba(18,183,245,.35);background:rgba(18,183,245,.07)}
.btn-qqline:hover{color:#c9f1ff;border-color:var(--qq);background:rgba(18,183,245,.16)}

.btn-qq{
  color:#04222e;border-color:transparent;
  background:linear-gradient(140deg,#7fe0ff,var(--qq) 58%,#0a86ba);
  box-shadow:0 12px 30px -14px rgba(18,183,245,.7);
}

/* 主按钮 */
.btn-hero{
  position:relative;
  width:100%;
  margin:18px 0 14px;
  padding:20px 24px;
  gap:16px;
  border:none;border-radius:var(--rl);
  color:#1a1204;
  background:linear-gradient(118deg,var(--gold-3) 0%,var(--gold) 40%,var(--ember) 100%);
  box-shadow:0 24px 54px -24px rgba(240,180,41,.75), 0 0 0 1px rgba(255,255,255,.18) inset;
  overflow:hidden;
  cursor:pointer;
  animation:breathe 4s ease-in-out infinite;
  display:flex;align-items:center;
  font-family:var(--fb);
}
.btn-hero::after{
  content:"";position:absolute;top:0;bottom:0;left:-45%;width:38%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.6),transparent);
  transform:skewX(-18deg);
  animation:sheen 4s ease-in-out infinite;
}
.btn-hero-ico{
  display:grid;place-items:center;
  width:46px;height:46px;flex:0 0 auto;
  border-radius:13px;background:rgba(0,0,0,.2);
}
.btn-hero-ico .ico{width:26px;height:26px}
.btn-hero-txt{display:flex;flex-direction:column;gap:3px;text-align:left;flex:1}
.btn-hero-txt strong{font-size:19px;letter-spacing:.6px}
.btn-hero-txt small{font-size:12.5px;opacity:.75;font-weight:500}
.btn-hero-go{font-size:15px;font-weight:700;white-space:nowrap;transition:transform .3s}
.btn-hero:hover .btn-hero-go{transform:translateX(5px)}

/* ===================== HERO ===================== */
.hero{
  position:relative;
  max-width:var(--max);
  margin:0 auto;
  padding:146px 24px 30px;
  text-align:center;
}
.hero-mist{
  position:absolute;top:40px;left:50%;
  width:min(1000px,96vw);height:480px;
  transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(240,180,41,.15),transparent 70%);
  filter:blur(10px);pointer-events:none;
  animation:float 11s ease-in-out infinite;
}
.hero-ridge{
  position:absolute;left:0;right:0;bottom:-1px;height:230px;
  pointer-events:none;overflow:hidden;opacity:.5;
}
.hero-ridge svg{position:absolute;bottom:0;left:0;width:100%;height:100%}
.hero-ridge svg path{fill:rgba(47,214,168,.07)}
.hero-ridge svg.r2{height:70%;opacity:.75}
.hero-ridge svg.r2 path{fill:rgba(240,180,41,.06)}

.eyebrow{
  position:relative;
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;letter-spacing:1.4px;
  color:var(--dim);
  padding:8px 18px;
  border:1px solid var(--line-2);border-radius:999px;
  background:rgba(255,255,255,.03);
  backdrop-filter:blur(8px);
}
.eyebrow b{color:var(--gold-2)}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--jade);animation:pulse 2s infinite}

.hero-title{
  position:relative;
  margin:28px 0 20px;
  line-height:1;
}
.hero-title .cn{
  display:block;
  font-family:var(--fd);
  font-size:clamp(72px,17vw,168px);
  font-weight:700;
  letter-spacing:.14em;
  text-indent:.14em;
  background:linear-gradient(100deg,var(--gold-3) 0%,var(--gold) 34%,var(--ember) 58%,var(--gold-3) 100%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;
  color:transparent;-webkit-text-fill-color:transparent;
  animation:shift 8s ease-in-out infinite;
  filter:drop-shadow(0 12px 40px rgba(240,180,41,.28));
}
.hero-title .en{
  display:block;
  margin-top:14px;
  font-family:var(--fm);
  font-size:clamp(11px,2.4vw,15px);
  letter-spacing:.5em;
  text-indent:.5em;
  color:var(--dim2);
}
.hero-sub{
  position:relative;
  max-width:660px;margin:0 auto 28px;
  color:var(--dim);font-size:16.5px;
}
.hero-sub strong{color:var(--gold-2)}

.connect-box{
  position:relative;
  max-width:700px;margin:0 auto;
  padding:22px;
  border:1px solid var(--line);
  border-radius:calc(var(--rl) + 6px);
  background:linear-gradient(180deg,rgba(20,27,35,.82),rgba(10,14,19,.82));
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  box-shadow:var(--sh);
}
.connect-top{display:grid;gap:9px;margin-bottom:4px}
.ct-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 13px;border-radius:10px;
  background:rgba(255,255,255,.028);
  border:1px solid var(--line);
  text-align:left;flex-wrap:wrap;
}
.ct-k{font-size:12px;letter-spacing:1.6px;color:var(--dim2);text-transform:uppercase;white-space:nowrap}
.ct-v{font-size:13.5px;color:var(--txt);text-align:right}
.ct-v b{color:var(--gold-2)}
.ct-v.ok{color:var(--jade)}
.ct-ip{
  font-size:14px;color:var(--gold-2);
  padding:4px 11px;border-radius:8px;
  background:rgba(240,180,41,.10);
  border:1px solid rgba(240,180,41,.26);
}
.connect-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}

/* 清档倒计时条 */
.wipe-box{
  position:relative;
  display:flex;align-items:center;gap:14px;
  max-width:700px;margin:0 auto 28px;
  padding:14px 20px;
  border:1px solid rgba(240,180,41,.28);
  border-radius:var(--r);
  background:linear-gradient(120deg,rgba(240,180,41,.10),rgba(17,23,30,.72) 60%);
  text-align:left;
  transition:border-color .3s, box-shadow .3s;
}
.wipe-box.stale{
  border-color:rgba(160,200,210,.26);
  background:linear-gradient(120deg,rgba(47,214,168,.06),rgba(17,23,30,.72) 60%);
}
.wipe-box.stale .wb-text em{color:var(--dim)}
.wb-ico{font-size:21px;line-height:1;flex:0 0 auto}
.wb-text{flex:1;display:flex;flex-direction:column;gap:3px;min-width:0}
.wb-text b{font-size:15px;letter-spacing:.4px;color:var(--gold-2)}
.wb-text small{font-size:12.5px;color:var(--dim)}
.wb-text em{font-style:normal;color:var(--jade);font-weight:700;font-family:var(--fm)}
.wb-tag{
  flex:0 0 auto;
  font-family:var(--fm);font-size:11.5px;letter-spacing:1.2px;
  padding:5px 11px;border-radius:999px;
  color:#1a1204;background:linear-gradient(140deg,var(--gold-3),var(--gold));
}


.hero-facts{
  position:relative;
  list-style:none;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:14px;margin:34px 0 0;padding:0;
}
.hero-facts li{
  padding:16px 18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(180deg,rgba(20,27,35,.6),rgba(10,14,19,.6));
  text-align:left;
  transition:transform .28s,border-color .28s;
}
.hero-facts li:hover{transform:translateY(-4px);border-color:rgba(240,180,41,.36)}
.hero-facts b{display:block;font-family:var(--fd);font-size:19px;color:var(--gold-2);margin-bottom:5px;letter-spacing:1px}
.hero-facts span{font-size:13px;color:var(--dim)}

/* ===================== 区块 ===================== */
.sec{
  position:relative;
  max-width:var(--max);margin:0 auto;
  padding:92px 24px;
  scroll-margin-top:80px;
}
.sec.alt::before{
  content:"";position:absolute;inset:20px -100vw;z-index:-1;
  background:linear-gradient(180deg,rgba(255,255,255,.022),rgba(255,255,255,0));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{
  margin:0 0 12px;
  font-family:var(--fd);
  font-size:clamp(32px,5vw,50px);
  letter-spacing:.1em;
  font-weight:700;
}
.sec-head h2::after{
  content:"";display:block;
  width:70px;height:3px;margin:16px auto 0;border-radius:3px;
  background:linear-gradient(90deg,var(--jade),var(--gold));
}
.sec-head p{margin:0;color:var(--dim);font-size:14.5px}

/* ===================== 服务器信息 ===================== */
.info-wrap{
  display:grid;
  grid-template-columns:1.35fr .9fr;
  gap:22px;
  align-items:start;
}
.info-card{
  padding:8px 26px;
  border:1px solid var(--line);
  border-radius:var(--rl);
  background:linear-gradient(180deg,rgba(20,27,35,.72),rgba(10,14,19,.72));
  box-shadow:var(--sh);
}
.ic-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:15px 0;
  border-bottom:1px dashed var(--line);
  flex-wrap:wrap;
}
.ic-row:last-child{border-bottom:0}
.ic-row span{font-size:13.5px;color:var(--dim2);letter-spacing:.6px}
.ic-row b{font-size:14.5px;font-weight:600;text-align:right}
.ic-row b.ok{color:var(--jade)}
.info-side{display:grid;gap:18px}
.side-card{
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--rl);
  background:linear-gradient(180deg,rgba(20,27,35,.72),rgba(10,14,19,.72));
}
.side-card h3{margin:0 0 14px;font-size:17px;letter-spacing:.6px}
.side-card.qq{border-color:rgba(18,183,245,.28);background:linear-gradient(150deg,rgba(18,183,245,.10),rgba(10,14,19,.8) 60%)}
.side-card.qq p{margin:0 0 14px;color:var(--dim);font-size:13.5px}
.big-ip{
  display:block;text-align:center;
  font-size:16px;letter-spacing:.6px;
  padding:13px;margin-bottom:12px;
  border-radius:11px;
  color:var(--gold-2);
  background:rgba(240,180,41,.09);
  border:1px dashed rgba(240,180,41,.34);
}
.big-ip.qqnum{color:#bfeeff;background:rgba(18,183,245,.10);border-color:rgba(18,183,245,.4);font-size:20px;letter-spacing:3px}
.side-card .btn + .btn{margin-top:10px}
.side-tip{margin:14px 0 0;font-size:12.5px;color:var(--dim2);line-height:1.7}

/* ===================== Rust 是什么 ===================== */
.about{display:grid;grid-template-columns:1.15fr 1fr;gap:34px;align-items:start}
.about-text p{margin:0 0 16px;color:var(--dim);font-size:15.5px}
.about-text p strong{color:var(--txt)}
.about-text .lead{font-size:17px;color:var(--txt);line-height:1.85}
.about-text .hl{
  padding:18px 20px;
  border-left:3px solid var(--gold);
  border-radius:0 12px 12px 0;
  background:rgba(240,180,41,.07);
  color:var(--txt)!important;
}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ac{
  padding:20px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(180deg,rgba(20,27,35,.66),rgba(10,14,19,.66));
  transition:transform .28s,border-color .28s,box-shadow .3s;
}
.ac:hover{transform:translateY(-5px);border-color:rgba(47,214,168,.4);box-shadow:0 24px 50px -30px rgba(47,214,168,.6)}
.ac-ico{font-size:24px;display:block;margin-bottom:10px}
.ac h4{margin:0 0 6px;font-size:15.5px;color:var(--gold-2)}
.ac p{margin:0;font-size:13.5px;color:var(--dim)}

/* ===================== 特色 ===================== */
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px}
.feat{
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--rl);
  background:linear-gradient(180deg,rgba(20,27,35,.7),rgba(10,14,19,.7));
  transition:transform .28s,border-color .28s,box-shadow .3s;
}
.feat:hover{transform:translateY(-5px);border-color:rgba(240,180,41,.4);box-shadow:0 26px 54px -30px rgba(240,180,41,.55)}
.f-ico{
  display:grid;place-items:center;
  width:46px;height:46px;margin-bottom:14px;
  border-radius:13px;font-size:21px;
  background:rgba(47,214,168,.09);
  border:1px solid rgba(47,214,168,.22);
}
.feat h3{margin:0 0 8px;font-size:16.5px;letter-spacing:.4px}
.feat p{margin:0;color:var(--dim);font-size:14px}
.feat code{color:var(--gold-2);font-size:13px}

/* ===================== 步骤 ===================== */
.steps{
  list-style:none;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(255px,1fr));
  gap:20px;margin:0 0 30px;padding:0;
}
.steps li{
  position:relative;
  padding:30px 24px 24px;
  border:1px solid var(--line);
  border-radius:var(--rl);
  background:linear-gradient(180deg,rgba(20,27,35,.66),rgba(10,14,19,.66));
  transition:transform .28s,border-color .28s;
}
.steps li:hover{transform:translateY(-5px);border-color:rgba(47,214,168,.4)}
.steps .n{
  position:absolute;top:-14px;left:20px;
  font-family:var(--fm);font-size:26px;font-weight:700;
  color:var(--gold);opacity:.95;
  text-shadow:0 8px 26px rgba(240,180,41,.6);
}
.steps h3{margin:14px 0 8px;font-size:16.5px}
.steps p{margin:0;color:var(--dim);font-size:14px}
.steps strong{color:var(--gold-2)}
.steps a{color:var(--jade);text-decoration:underline;text-underline-offset:3px}

.manual{
  padding:26px;
  border:1px dashed var(--line-2);
  border-radius:var(--rl);
  background:rgba(255,255,255,.02);
  text-align:center;
}
.manual h4{margin:0 0 18px;font-size:16px;color:var(--gold-2);letter-spacing:.5px}
.manual-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:12px;margin-bottom:18px;
}
.manual-grid div{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:11px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  font-size:13.5px;color:var(--dim);text-align:left;
}
.manual-grid span{
  display:grid;place-items:center;
  width:24px;height:24px;flex:0 0 auto;
  border-radius:7px;font-size:12.5px;font-weight:700;
  color:#1a1204;background:var(--gold);
}
.manual-cmd{
  display:block;margin:0 auto 16px;
  padding:15px;max-width:520px;
  font-size:15.5px;letter-spacing:.5px;
  color:var(--jade);
  border-radius:12px;
  background:rgba(47,214,168,.08);
  border:1px solid rgba(47,214,168,.3);
  overflow-x:auto;
}

/* ===================== FAQ ===================== */
.faq{max-width:840px;margin:0 auto;display:grid;gap:12px}
.faq details{
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(255,255,255,.025);
  overflow:hidden;
  transition:border-color .28s,background .28s;
}
.faq details[open]{border-color:rgba(240,180,41,.4);background:rgba(240,180,41,.05)}
.faq summary{
  position:relative;
  padding:18px 56px 18px 22px;
  cursor:pointer;font-weight:600;font-size:15.5px;
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:22px;top:50%;
  transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--gold-2);
  transition:transform .3s;
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq p{margin:0;padding:0 22px 20px;color:var(--dim);font-size:14.5px}
.faq b{color:var(--gold-2)}
.faq code{color:var(--jade)}

/* ===================== QQ ===================== */
.qq-sec{padding-top:30px}
.qq-banner{
  display:flex;align-items:center;justify-content:space-between;
  gap:26px;flex-wrap:wrap;
  padding:30px 34px;
  border-radius:calc(var(--rl) + 6px);
  border:1px solid rgba(18,183,245,.3);
  background:linear-gradient(120deg,rgba(18,183,245,.13),rgba(20,27,35,.82) 55%);
  box-shadow:0 30px 70px -36px rgba(18,183,245,.6);
}
.qb-left{display:flex;align-items:center;gap:20px}
.qb-badge{
  display:grid;place-items:center;
  width:62px;height:62px;flex:0 0 auto;
  border-radius:18px;
  font-family:var(--fm);font-size:20px;font-weight:700;
  color:#04222e;
  background:linear-gradient(140deg,#7fe0ff,var(--qq));
  box-shadow:0 16px 36px -16px rgba(18,183,245,.85);
}
.qb-left h2{margin:0 0 6px;font-family:var(--fd);font-size:28px;letter-spacing:.1em}
.qb-left p{margin:0;color:var(--dim);font-size:14px}
.qb-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.qb-num{
  font-size:22px;letter-spacing:3px;color:#bfeeff;
  padding:11px 18px;border-radius:11px;
  background:rgba(18,183,245,.12);
  border:1px dashed rgba(18,183,245,.45);
}

/* ===================== 页脚 ===================== */
.foot{
  max-width:var(--max);margin:0 auto;
  padding:54px 24px 42px;
  border-top:1px solid var(--line);
}
.foot-top{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-bottom:26px;
}
.ft-brand{display:flex;align-items:center;gap:14px}
.ft-brand strong{display:block;font-size:15px}
.ft-brand span{display:block;font-size:12.5px;color:var(--dim2);font-family:var(--fm);margin-top:3px}
.ft-links{display:flex;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--dim)}
.ft-links a:hover{color:var(--gold-2)}
.ft-note{margin:0;color:var(--dim2);font-size:12.5px;line-height:2}

/* ===================== 弹层 / Toast ===================== */
.modal{
  position:fixed;inset:0;z-index:200;
  display:grid;place-items:center;padding:20px;
  background:rgba(3,5,7,.8);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;
  transition:opacity .28s,visibility .28s;
}
.modal.open{opacity:1;visibility:visible}
.modal-card{
  position:relative;
  width:min(520px,100%);
  padding:34px 30px 28px;
  text-align:center;
  border:1px solid var(--line-2);
  border-radius:calc(var(--rl) + 6px);
  background:linear-gradient(180deg,rgba(23,30,39,.97),rgba(10,14,19,.97));
  box-shadow:var(--sh);
  transform:translateY(18px) scale(.97);
  transition:transform .34s cubic-bezier(.34,1.4,.5,1);
}
.modal.open .modal-card{transform:none}
.modal-x{
  position:absolute;top:12px;right:14px;
  width:34px;height:34px;border:0;border-radius:9px;
  background:rgba(255,255,255,.05);color:var(--dim);
  font-size:15px;cursor:pointer;transition:background .2s,color .2s;
}
.modal-x:hover{background:rgba(255,255,255,.12);color:var(--txt)}
.modal-card h3{margin:18px 0 8px;font-size:20px}
.modal-card p{margin:0 0 16px;color:var(--dim);font-size:14.5px}
.modal-card p strong{color:var(--gold-2)}
.loader{display:flex;justify-content:center;gap:9px;height:34px;align-items:center}
.loader span{
  width:11px;height:11px;border-radius:50%;background:var(--gold);
  animation:bounce 1.1s ease-in-out infinite;
}
.loader span:nth-child(2){animation-delay:.14s;background:var(--gold-2)}
.loader span:nth-child(3){animation-delay:.28s;background:var(--gold-3)}
.modal-ip{
  display:block;
  margin:0 0 18px;padding:12px;
  border-radius:11px;font-size:14.5px;
  color:var(--gold-2);
  background:rgba(240,180,41,.08);
  border:1px solid rgba(240,180,41,.26);
}
.modal-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.modal-tip{margin:20px 0 0!important;font-size:13px!important;color:var(--dim2)!important}
.modal-tip a{color:var(--qq)}
.modal-tip a:hover{text-decoration:underline}

.toast{
  position:fixed;left:50%;bottom:34px;z-index:300;
  transform:translate(-50%,26px);
  padding:13px 22px;border-radius:11px;
  border:1px solid rgba(240,180,41,.42);
  background:rgba(17,23,30,.97);
  color:var(--txt);font-size:14px;
  box-shadow:var(--sh);
  opacity:0;visibility:hidden;
  transition:opacity .26s,transform .3s cubic-bezier(.34,1.4,.5,1),visibility .26s;
}
.toast.on{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ===================== 进场 / 关键帧 ===================== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .75s ease,transform .75s cubic-bezier(.22,.7,.24,1)}
.reveal.in{opacity:1;transform:none}

@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(47,214,168,.55)}
  70%{box-shadow:0 0 0 12px rgba(47,214,168,0)}
  100%{box-shadow:0 0 0 0 rgba(47,214,168,0)}
}
@keyframes breathe{
  0%,100%{box-shadow:0 24px 54px -24px rgba(240,180,41,.75),0 0 0 1px rgba(255,255,255,.18) inset}
  50%{box-shadow:0 28px 68px -20px rgba(255,106,31,.85),0 0 0 1px rgba(255,255,255,.28) inset}
}
@keyframes sheen{0%{left:-45%}55%{left:115%}100%{left:115%}}
@keyframes shift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
@keyframes float{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-20px)}}
@keyframes bounce{0%,100%{transform:translateY(0);opacity:.55}50%{transform:translateY(-11px);opacity:1}}

/* ===================== 响应式 ===================== */
@media (max-width:1040px){
  .nav-links{display:none}
  .info-wrap{grid-template-columns:1fr}
  .about{grid-template-columns:1fr}
}
@media (max-width:720px){
  .hero{padding-top:116px}
  .nav{padding:12px 16px;gap:10px}
  .live{display:none}
  .connect-box{padding:16px}
  .ct-row{justify-content:flex-start}
  .ct-v{text-align:left}
  .btn-hero{padding:17px 16px;gap:12px}
  .btn-hero-txt strong{font-size:16px}
  .btn-hero-txt small{font-size:11.5px}
  .btn-hero-go{display:none}
  .connect-btns .btn{flex:1 1 46%}
  .sec{padding:68px 18px}
  .about-cards{grid-template-columns:1fr}
  .qq-banner{padding:24px}
  .qb-right{width:100%}
  .qb-num{width:100%;text-align:center}
  .qb-right .btn{flex:1 1 46%}
  .hero-ridge{height:150px}
  .wipe-box{padding:13px 15px;gap:11px}
  .wb-tag{display:none}
  .wb-text b{font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}