/* ===================================================
   一云梯机场 — 暗黑极客风 Cyberpunk / Dark Tech
   =================================================== */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=JetBrains+Mono:wght@300;400;600&family=Rajdhani:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* ─── 变量 ──────────────────────────────────────── */
:root {
  --black:      #06080d;
  --card:       #0e1117;
  --card2:      #111520;
  --terminal:   #070a10;
  --cyan:       #00ffe0;
  --purple:     #bf5fff;
  --blue:       #0095ff;
  --cyan-glow:  0 0 18px rgba(0,255,224,.55);
  --pur-glow:   0 0 18px rgba(191,95,255,.5);
  --blue-glow:  0 0 18px rgba(0,149,255,.5);
  --border-c:   rgba(0,255,224,.18);
  --border-p:   rgba(191,95,255,.22);
  --text1: #dce8f5;
  --text2: #7a8caa;
  --r: 14px;
  --ease: all .3s cubic-bezier(.4,0,.2,1);
}

/* ─── 基础 ──────────────────────────────────────── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:74px}
body{font-family:'Noto Sans SC','Rajdhani',sans-serif;background:var(--black);color:var(--text1);overflow-x:hidden;line-height:1.75}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
::selection{background:rgba(0,255,224,.25)}

/* ─── 粒子背景 Canvas ───────────────────────────── */
#bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none}

/* ─── 网格叠层 ──────────────────────────────────── */
.grid-overlay{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(0,255,224,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,255,224,.035) 1px,transparent 1px);
  background-size:48px 48px;
  animation:gridScroll 25s linear infinite;
}
@keyframes gridScroll{to{background-position:48px 48px}}

/* ─── 导航栏 ────────────────────────────────────── */
.navbar{
  position:fixed;top:0;left:0;right:0;height:70px;z-index:999;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;
  background:rgba(6,8,13,.85);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-c);
}
.nav-logo{display:flex;align-items:center;gap:10px}
.logo-icon{
  width:36px;height:36px;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  display:flex;align-items:center;justify-content:center;
  font-family:'Orbitron';font-weight:900;font-size:16px;color:#fff;
  box-shadow:var(--cyan-glow);
}
.logo-text{font-family:'Orbitron';font-size:18px;font-weight:700;letter-spacing:1px}
.logo-text em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;gap:4px}
.nav-links a{
  padding:7px 14px;border-radius:8px;font-size:14px;
  color:var(--text2);transition:var(--ease);
}
.nav-links a:hover,.nav-links a.active{
  color:var(--cyan);background:rgba(0,255,224,.07);
}
.nav-btn{
  padding:9px 22px;border-radius:22px;font-weight:700;font-size:14px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#06080d;box-shadow:var(--cyan-glow);transition:var(--ease);
}
.nav-btn:hover{transform:translateY(-2px);box-shadow:0 0 28px rgba(0,255,224,.7)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px}
.hamburger span{width:24px;height:2px;background:var(--text2);border-radius:2px;transition:var(--ease)}

/* ─── Hero ──────────────────────────────────────── */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:100px 40px 80px;z-index:1;
}
.hero-wrap{
  max-width:1200px;width:100%;
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
}
/* 光晕球 */
.orb{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.orb-c{width:500px;height:500px;background:rgba(0,255,224,.08);top:-10%;right:-8%}
.orb-p{width:400px;height:400px;background:rgba(191,95,255,.07);bottom:-5%;left:-5%}

.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:20px;margin-bottom:22px;
  background:rgba(0,255,224,.07);border:1px solid var(--border-c);
  font-family:'JetBrains Mono';font-size:12px;color:var(--cyan);
}
.pulse{width:7px;height:7px;border-radius:50%;background:var(--cyan);animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(0,255,224,.5)}50%{opacity:.7;box-shadow:0 0 0 8px rgba(0,255,224,0)}}

.hero-title{
  font-family:'Orbitron';font-size:54px;font-weight:900;
  line-height:1.08;margin-bottom:18px;letter-spacing:1px;
}
.grad-c{background:linear-gradient(135deg,var(--cyan) 0%,var(--blue) 60%,var(--purple) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.hero-sub{font-size:16px;color:var(--text2);margin-bottom:22px;max-width:440px;line-height:1.8}

.proto-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.proto-tag{
  padding:4px 12px;border-radius:16px;font-family:'JetBrains Mono';font-size:11px;
  color:var(--cyan);border:1px solid var(--border-c);
  background:rgba(0,255,224,.05);transition:var(--ease);
}
.proto-tag:hover{background:rgba(0,255,224,.12);box-shadow:var(--cyan-glow)}

.hero-btns{display:flex;gap:14px}
.btn-prim{
  padding:13px 30px;border-radius:12px;font-weight:700;font-size:15px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#06080d;border:none;cursor:pointer;transition:var(--ease);
  box-shadow:var(--cyan-glow);
}
.btn-prim:hover{transform:translateY(-3px);box-shadow:0 0 36px rgba(0,255,224,.7)}
.btn-sec{
  padding:13px 30px;border-radius:12px;font-weight:600;font-size:15px;
  background:rgba(255,255,255,.04);color:var(--cyan);
  border:1px solid var(--border-c);cursor:pointer;transition:var(--ease);
}
.btn-sec:hover{background:rgba(0,255,224,.09)}

/* ─── Terminal ──────────────────────────────────── */
.terminal{
  background:var(--terminal);border-radius:var(--r);
  border:1px solid var(--border-c);overflow:hidden;
  box-shadow:0 0 60px rgba(0,255,224,.1),0 0 0 1px rgba(0,255,224,.05);
  animation:termGlow 4s ease-in-out infinite;
}
@keyframes termGlow{
  0%,100%{box-shadow:0 0 40px rgba(0,255,224,.1),0 0 0 1px rgba(0,255,224,.05)}
  50%{box-shadow:0 0 70px rgba(0,255,224,.2),0 0 0 1px rgba(0,255,224,.08)}
}
.term-bar{
  display:flex;align-items:center;gap:7px;
  padding:11px 16px;background:rgba(0,0,0,.35);
  border-bottom:1px solid rgba(0,255,224,.08);
}
.tdot{width:12px;height:12px;border-radius:50%}
.tdot.r{background:#ff5f57}.tdot.y{background:#ffbd2e}.tdot.g{background:#28ca42}
.term-title{margin-left:8px;font-family:'JetBrains Mono';font-size:11px;color:rgba(255,255,255,.4)}
.term-body{
  padding:20px;font-family:'JetBrains Mono';font-size:13px;
  color:rgba(255,255,255,.85);min-height:300px;line-height:2;
  overflow-y:auto;
}
.tl{opacity:0;transform:translateX(-8px);transition:opacity .4s,transform .4s}
.tl.show{opacity:1;transform:none}
.c-prompt{color:var(--cyan)}.c-cmd{color:#fff}.c-ok{color:#28ca42}
.c-info{color:var(--blue)}.c-speed{color:var(--cyan);font-weight:700;text-shadow:var(--cyan-glow)}
.c-warn{color:#ffbd2e}
.cursor{display:inline-block;width:8px;height:15px;background:var(--cyan);animation:blink 1s step-end infinite;vertical-align:middle;margin-left:3px}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* ─── 通用 Section ──────────────────────────────── */
.section{position:relative;z-index:1;padding:100px 40px}
.s-head{text-align:center;margin-bottom:64px}
.s-label{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:20px;
  border:1px solid var(--border-c);background:rgba(0,255,224,.06);
  font-family:'JetBrains Mono';font-size:12px;color:var(--cyan);
  margin-bottom:14px;
}
.s-title{font-family:'Rajdhani';font-size:40px;font-weight:700;margin-bottom:10px}
.s-title .hl{background:linear-gradient(135deg,var(--cyan),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.s-desc{color:var(--text2);max-width:580px;margin:0 auto;font-size:15px}
.wrap{max-width:1200px;margin:0 auto}

/* ─── 核心优势 ──────────────────────────────────── */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv-card{
  background:var(--card);border:1px solid var(--border-c);border-radius:var(--r);
  padding:30px 22px;text-align:center;transition:var(--ease);position:relative;overflow:hidden;
}
.adv-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  transform:scaleX(0);transform-origin:left;transition:transform .4s ease;
}
.adv-card:hover::before{transform:scaleX(1)}
.adv-card:hover{transform:translateY(-8px);box-shadow:0 0 30px rgba(0,255,224,.15);border-color:rgba(0,255,224,.4)}
.adv-icon{width:60px;height:60px;margin:0 auto 18px;border-radius:14px;font-size:26px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(0,255,224,.06);border:1px solid var(--border-c);}
.adv-card:hover .adv-icon{box-shadow:var(--cyan-glow)}
.adv-title{font-family:'Rajdhani';font-size:20px;font-weight:700;margin-bottom:8px;color:var(--text1)}
.adv-desc{font-size:13px;color:var(--text2);line-height:1.7}

/* ─── 协议支持列表 ──────────────────────────────── */
.proto-section{background:var(--card2)}
.proto-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proto-card{
  background:var(--card);border-radius:var(--r);padding:28px;
  border:1px solid var(--border-p);transition:var(--ease);
}
.proto-card:hover{border-color:var(--purple);box-shadow:var(--pur-glow);transform:translateY(-5px)}
.proto-name{font-family:'Orbitron';font-size:18px;color:var(--purple);margin-bottom:10px}
.proto-desc{font-size:13px;color:var(--text2);line-height:1.7}

/* ─── BGP 拓扑 ──────────────────────────────────── */
.topo-box{
  background:var(--card);border:1px solid var(--border-c);border-radius:var(--r);
  padding:40px;position:relative;overflow:hidden;margin-top:20px;
}
.topo-box::before{
  content:'';position:absolute;inset:0;
  background-image:linear-gradient(rgba(0,255,224,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(0,255,224,.025) 1px,transparent 1px);
  background-size:28px 28px;pointer-events:none;
}
.topo-title{font-family:'JetBrains Mono';font-size:13px;color:var(--cyan);text-align:center;margin-bottom:32px;letter-spacing:2px}
.topo-row{display:flex;align-items:center;justify-content:center;gap:0}
.topo-node{display:flex;flex-direction:column;align-items:center;gap:8px;position:relative;z-index:2}
.topo-circle{
  width:64px;height:64px;border-radius:50%;
  border:2px solid var(--cyan);
  display:flex;align-items:center;justify-content:center;font-size:20px;
  background:rgba(0,255,224,.06);
  box-shadow:var(--cyan-glow);transition:var(--ease);
}
.topo-circle:hover{transform:scale(1.15);box-shadow:0 0 36px rgba(0,255,224,.7)}
.topo-label{font-family:'JetBrains Mono';font-size:10px;color:var(--text2);text-align:center;white-space:nowrap}
.topo-line{
  flex:1;height:2px;background:linear-gradient(90deg,var(--cyan),var(--purple),var(--cyan));
  position:relative;animation:linePulse 2.5s ease-in-out infinite;
}
@keyframes linePulse{0%,100%{opacity:.4}50%{opacity:1}}
.topo-ms{
  position:absolute;top:-18px;left:50%;transform:translateX(-50%);
  font-family:'JetBrains Mono';font-size:10px;color:var(--cyan);white-space:nowrap;
}

/* ─── 节点状态 ──────────────────────────────────── */
.nodes-section{background:var(--card2)}
.nodes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.node-card{
  background:var(--card);border:1px solid var(--border-c);
  border-radius:var(--r);padding:24px;transition:var(--ease);
}
.node-card:hover{border-color:rgba(0,255,224,.4);box-shadow:0 0 25px rgba(0,255,224,.12);transform:translateY(-4px)}
.node-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.node-name{display:flex;align-items:center;gap:10px}
.flag{font-size:24px}
.n-label{font-family:'Rajdhani';font-weight:600;font-size:16px}
.node-status{display:flex;align-items:center;gap:6px;font-family:'JetBrains Mono';font-size:11px;color:var(--text2)}
.sdot{width:8px;height:8px;border-radius:50%;animation:pulse 2s ease-in-out infinite}
.sdot.on{background:#28ca42}.sdot.warn{background:#ffbd2e}.sdot.off{background:#ff5f57}
.node-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.n-stat{background:rgba(0,255,224,.04);border-radius:8px;padding:10px}
.n-stat-lbl{font-family:'JetBrains Mono';font-size:10px;color:var(--text2);text-transform:uppercase;margin-bottom:4px}
.n-stat-val{font-family:'Orbitron';font-size:18px;font-weight:700;color:var(--cyan);text-shadow:var(--cyan-glow)}
.n-stat-val.ok{color:#28ca42;text-shadow:0 0 12px rgba(40,202,66,.5)}
.n-stat-val.med{color:#ffbd2e;text-shadow:0 0 12px rgba(255,189,46,.4)}
.node-bar{}
.nb-head{display:flex;justify-content:space-between;font-family:'JetBrains Mono';font-size:10px;color:var(--text2);margin-bottom:5px}
.nb-track{height:4px;background:rgba(255,255,255,.06);border-radius:2px;overflow:hidden}
.nb-fill{height:100%;background:linear-gradient(90deg,var(--cyan),var(--blue));border-radius:2px;box-shadow:var(--cyan-glow);transition:width 1.8s ease}

/* ─── 套餐价格 ──────────────────────────────────── */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.p-card{
  background:var(--card);border:1px solid var(--border-c);
  border-radius:var(--r);padding:38px 30px;transition:var(--ease);position:relative;overflow:hidden;
}
.p-card:hover{transform:translateY(-8px);box-shadow:0 0 35px rgba(0,255,224,.15)}
.p-card.hot{
  border-color:var(--cyan);
  box-shadow:0 0 40px rgba(0,255,224,.18);
}
.p-card.hot .p-badge{
  position:absolute;top:18px;right:-28px;background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#06080d;font-size:11px;font-weight:700;padding:4px 38px;
  transform:rotate(45deg);
}
.p-tier{font-family:'JetBrains Mono';font-size:11px;color:var(--cyan);letter-spacing:2px;text-transform:uppercase;margin-bottom:6px}
.p-name{font-family:'Orbitron';font-size:22px;font-weight:700;margin-bottom:18px}
.p-price{margin-bottom:24px}
.p-amount{font-family:'Orbitron';font-size:52px;font-weight:900;background:linear-gradient(135deg,var(--cyan),var(--blue));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.p-period{font-size:13px;color:var(--text2)}
.p-features{margin-bottom:30px}
.p-features li{
  padding:8px 0;font-size:13px;color:var(--text2);
  border-bottom:1px solid rgba(255,255,255,.04);
  display:flex;align-items:center;gap:8px;
}
.p-features li::before{content:'✦';color:var(--cyan);font-size:11px}
.p-btn{
  display:block;width:100%;padding:13px;text-align:center;
  border-radius:10px;font-weight:700;font-size:14px;transition:var(--ease);cursor:pointer;border:none;
}
.p-btn.prim{background:linear-gradient(135deg,var(--cyan),var(--blue));color:#06080d;box-shadow:var(--cyan-glow)}
.p-btn.prim:hover{box-shadow:0 0 36px rgba(0,255,224,.7);transform:translateY(-2px)}
.p-btn.outl{background:transparent;color:var(--cyan);border:1px solid var(--border-c)}
.p-btn.outl:hover{background:rgba(0,255,224,.07)}

/* ─── 用户评价 ──────────────────────────────────── */
.reviews-section{background:var(--card2)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.r-card{
  background:var(--card);border:1px solid var(--border-c);
  border-radius:var(--r);padding:28px;transition:var(--ease);
}
.r-card:hover{border-color:rgba(0,255,224,.38);transform:translateY(-5px);box-shadow:0 0 25px rgba(0,255,224,.1)}
.r-stars{color:#ffd86e;letter-spacing:3px;margin-bottom:14px;font-size:15px}
.r-text{font-size:14px;color:var(--text2);line-height:1.85;margin-bottom:18px}
.r-author{display:flex;align-items:center;gap:12px}
.r-avatar{
  width:40px;height:40px;border-radius:50%;
  background:linear-gradient(135deg,var(--cyan),var(--purple));
  display:flex;align-items:center;justify-content:center;
  color:#06080d;font-weight:700;font-size:16px;
}
.r-name{font-weight:600;font-size:13px}
.r-date{font-size:11px;color:var(--text2)}

/* ─── FAQ ───────────────────────────────────────── */
.faq-list{max-width:780px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--border-c);
  border-radius:var(--r);margin-bottom:12px;overflow:hidden;transition:var(--ease);
}
.faq-item:hover,.faq-item.open{border-color:rgba(0,255,224,.38)}
.faq-item.open{box-shadow:0 0 20px rgba(0,255,224,.08)}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 22px;cursor:pointer;font-weight:600;font-size:15px;
  transition:var(--ease);
}
.faq-q:hover{color:var(--cyan)}
.faq-icon{
  width:26px;height:26px;border-radius:50%;border:1px solid var(--border-c);
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan);font-size:18px;flex-shrink:0;transition:var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--cyan);color:#06080d;border-color:var(--cyan)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s ease}
.faq-item.open .faq-a{max-height:220px}
.faq-a-in{padding:0 22px 18px;font-size:14px;color:var(--text2);line-height:1.85}

/* ─── 知识库 ────────────────────────────────────── */
.kb-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.kb-card{
  background:var(--card);border:1px solid var(--border-c);
  border-radius:var(--r);padding:22px;transition:var(--ease);
  display:block;color:inherit;position:relative;overflow:hidden;
}
.kb-card::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--cyan),var(--purple));transform:scaleX(0);transform-origin:left;transition:transform .35s ease}
.kb-card:hover::after{transform:scaleX(1)}
.kb-card:hover{border-color:rgba(0,255,224,.4);transform:translateY(-6px);box-shadow:0 0 28px rgba(0,255,224,.12)}
.kb-tag{display:inline-block;padding:3px 10px;background:rgba(0,255,224,.08);color:var(--cyan);font-size:11px;border-radius:12px;margin-bottom:10px;font-family:'JetBrains Mono'}
.kb-title{font-family:'Rajdhani';font-size:16px;font-weight:700;margin-bottom:7px;line-height:1.4}
.kb-desc{font-size:12px;color:var(--text2);line-height:1.65;margin-bottom:14px}
.kb-foot{display:flex;justify-content:space-between;font-size:11px;color:var(--text2)}
.kb-more{color:var(--cyan);font-weight:600}

/* ─── Footer ────────────────────────────────────── */
.footer{
  background:#04060b;color:var(--text2);
  padding:60px 40px 28px;border-top:1px solid var(--border-c);
  position:relative;z-index:1;
}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.f-brand .logo-text{font-size:16px;margin-bottom:12px}
.f-desc{font-size:13px;line-height:1.85;margin-bottom:16px}
.f-col h4{font-family:'Rajdhani';font-size:15px;font-weight:700;color:var(--text1);margin-bottom:14px}
.f-col a{display:block;font-size:13px;padding:4px 0;color:var(--text2);transition:var(--ease)}
.f-col a:hover{color:var(--cyan);padding-left:5px}
.f-bottom{max-width:1200px;margin:0 auto;padding-top:22px;border-top:1px solid rgba(255,255,255,.05);display:flex;justify-content:space-between;font-size:12px}
.f-bottom a{color:var(--cyan)}

/* ─── 文章页 ────────────────────────────────────── */
.article-wrap{max-width:820px;margin:0 auto;padding:40px 20px}
.art-back{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:13px;margin-bottom:28px}
.art-back:hover{text-decoration:underline}
.art-tag{display:inline-block;padding:3px 10px;background:rgba(0,255,224,.08);color:var(--cyan);font-size:11px;border-radius:12px;margin-bottom:14px;font-family:'JetBrains Mono'}
.art-title{font-family:'Rajdhani';font-size:36px;font-weight:700;margin-bottom:12px;line-height:1.2}
.art-meta{font-size:12px;color:var(--text2);margin-bottom:30px;font-family:'JetBrains Mono'}
.art-body h2{font-family:'Rajdhani';font-size:24px;font-weight:700;margin:32px 0 14px;padding-left:14px;border-left:3px solid var(--cyan);color:var(--text1)}
.art-body h3{font-size:18px;font-weight:600;margin:22px 0 10px;color:var(--text1)}
.art-body p{font-size:14px;color:var(--text2);margin-bottom:14px;line-height:1.9}
.art-body ul,.art-body ol{margin:14px 0;padding-left:20px}
.art-body li{font-size:14px;color:var(--text2);margin-bottom:7px;line-height:1.8}
.art-body code{background:rgba(0,255,224,.07);color:var(--cyan);padding:2px 7px;border-radius:4px;font-family:'JetBrains Mono';font-size:12px}
.art-body pre{background:var(--terminal);border:1px solid var(--border-c);border-radius:10px;padding:20px;margin:18px 0;overflow-x:auto;font-family:'JetBrains Mono';font-size:12px;color:var(--cyan);line-height:1.75}
.art-body .tip-box{background:rgba(0,255,224,.04);border:1px solid var(--border-c);border-radius:10px;padding:18px;margin:18px 0}
.art-body .tip-box h4{color:var(--cyan);font-size:14px;margin-bottom:8px}
.art-related{margin-top:48px;padding-top:30px;border-top:1px solid var(--border-c)}
.art-related h3{font-family:'Rajdhani';font-size:22px;font-weight:700;margin-bottom:16px}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rel-link{
  display:block;padding:14px 16px;background:var(--card);
  border:1px solid var(--border-c);border-radius:10px;
  font-size:13px;font-weight:600;color:var(--text1);transition:var(--ease);
}
.rel-link:hover{border-color:var(--cyan);color:var(--cyan);transform:translateX(4px)}

/* ─── 滚动动画 ──────────────────────────────────── */
.fade{opacity:0;transform:translateY(28px);transition:opacity .65s ease,transform .65s ease}
.fade.in{opacity:1;transform:none}
.fd1{transition-delay:.1s}.fd2{transition-delay:.2s}.fd3{transition-delay:.3s}.fd4{transition-delay:.4s}

/* ─── 滚动条 ────────────────────────────────────── */
::-webkit-scrollbar{width:7px}
::-webkit-scrollbar-track{background:var(--black)}
::-webkit-scrollbar-thumb{background:rgba(0,255,224,.25);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(0,255,224,.45)}

/* ─── 响应式 ────────────────────────────────────── */
@media(max-width:1100px){
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .kb-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .hero-wrap{grid-template-columns:1fr}
  .pricing-grid,.reviews-grid,.nodes-grid,.proto-grid{grid-template-columns:1fr}
  .topo-row{flex-direction:column;gap:18px}
  .topo-line{width:2px;height:40px;background:linear-gradient(180deg,var(--cyan),var(--purple))}
}
@media(max-width:700px){
  .navbar{padding:0 18px}
  .nav-links{display:none;position:fixed;top:70px;left:0;right:0;background:rgba(6,8,13,.97);flex-direction:column;padding:18px;gap:4px;border-bottom:1px solid var(--border-c)}
  .nav-links.open{display:flex}
  .hamburger{display:flex}
  .section{padding:70px 20px}
  .hero{padding:100px 20px 70px}
  .hero-title{font-size:34px}
  .s-title{font-size:28px}
  .adv-grid,.kb-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .f-bottom{flex-direction:column;gap:8px;text-align:center}
}