@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&family=Space+Grotesk:wght@500;700&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  --bg: #0a0d0b;          /* 机房深底 */
  --panel: #10150f;       /* 机柜面板 */
  --panel-2: #151b13;
  --phos: #43e97b;        /* 磷光绿 */
  --phos-dim: rgba(67,233,123,.55);
  --amber: #ffb454;       /* 琥珀指示 */
  --amber-dim: rgba(255,180,84,.5);
  --txt: #e6efe6;
  --gray: #8fa08f;
  --gray-d: #556355;
  --hair: rgba(67,233,123,.16);
  --hair-w: rgba(230,239,230,.1);
  --page-pad: max(6vw, calc((100% - 1040px) / 2));
  --page-pad-vw: max(6vw, calc((100vw - 1040px) / 2));
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--txt);
  font-family: 'Noto Sans SC', sans-serif; font-weight: 300;
  overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
::selection { background: var(--phos); color: var(--bg); }
.mono { font-family: 'JetBrains Mono', monospace; }

#progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: var(--phos); z-index: 99; }

/* ── 导航 ─────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px var(--page-pad-vw); transition: background .4s, border-color .4s, padding .4s;
  border-bottom: 1px solid transparent;
}
nav.scrolled { background: rgba(10,13,11,.92); backdrop-filter: blur(10px); border-bottom-color: var(--hair); padding: 11px var(--page-pad-vw); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--txt); }
.brand .led {
  width: 30px; height: 30px; background: var(--panel-2); border: 1px solid var(--phos);
  display: grid; place-items: center; position: relative;
}
.brand .led::before {
  content: ""; width: 8px; height: 8px; background: var(--phos);
  box-shadow: 0 0 8px var(--phos-dim); animation: blink 2.2s steps(1) infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
.brand b { font-weight: 700; font-size: 15px; letter-spacing: .14em; }
.brand small { font-family: 'JetBrains Mono', monospace; font-size: 9.5px; letter-spacing: .24em; color: var(--gray-d); display: block; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--gray); text-decoration: none; font-size: 13px; letter-spacing: .16em; transition: color .25s; }
.nav-links a:hover { color: var(--phos); }
.nav-cta {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .14em;
  border: 1px solid var(--phos); color: var(--phos); padding: 9px 20px;
  text-decoration: none; transition: all .25s;
}
.nav-cta:hover { background: var(--phos); color: var(--bg); box-shadow: 0 0 22px rgba(67,233,123,.35); }

/* ── HERO ─────────────────────────────── */
header { position: relative; min-height: 100vh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; padding: 0 var(--page-pad); }
#rack { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
header::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(0,0,0,.14) 3px 4px);
}
.hero-inner { position: relative; z-index: 3; max-width: 900px; }
.kicker {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .3em;
  color: var(--phos); display: flex; align-items: center; gap: 14px; margin-bottom: 3.4vh;
}
.kicker::before { content: ""; width: 44px; height: 1px; background: var(--phos); }
.status-pill {
  display: inline-flex; align-items: center; gap: 9px; margin-bottom: 2.6vh;
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .2em;
  border: 1px solid var(--hair); padding: 7px 16px; color: var(--gray); background: rgba(16,21,15,.7);
}
.status-pill i { width: 7px; height: 7px; border-radius: 50%; background: var(--phos); box-shadow: 0 0 9px var(--phos-dim); animation: blink 1.6s steps(1) infinite; }

.hero-title {
  font-weight: 900; font-size: clamp(48px, 9vw, 120px);
  line-height: 1.04; letter-spacing: .02em; color: var(--txt);
}
.hero-title .row2 { display: flex; align-items: baseline; gap: .16em; flex-wrap: wrap; }
.hero-title .accent { color: var(--phos); text-shadow: 0 0 32px rgba(67,233,123,.4); }
.hero-title .en {
  font-family: 'Space Grotesk', sans-serif; font-weight: 700;
  font-size: .22em; letter-spacing: .3em; color: var(--gray);
  border: 1px solid var(--hair); padding: .28em .5em; transform: translateY(-.6em);
}
.hero-title .l1 { animation: bootin 1s cubic-bezier(.16,.84,.28,1) both; }
.hero-title .row2 { animation: bootin 1s .15s cubic-bezier(.16,.84,.28,1) both; }
@keyframes bootin { from { opacity: 0; transform: translateY(36px); filter: blur(10px); } to { opacity: 1; transform: none; filter: blur(0); } }

.hero-sub {
  margin-top: 3.4vh; max-width: 600px;
  font-size: clamp(14px, 1.35vw, 16.5px); line-height: 2.1; color: var(--gray);
  animation: bootin .9s .35s cubic-bezier(.2,.7,.2,1) both;
}
.hero-sub em { font-style: normal; color: var(--txt); font-weight: 400; }
.hero-sub b { color: var(--amber); font-weight: 400; }

.hero-cta { display: flex; gap: 16px; margin-top: 4.4vh; flex-wrap: wrap; animation: bootin .9s .5s cubic-bezier(.2,.7,.2,1) both; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 15px 32px;
  border: 1px solid var(--phos); font-family: 'JetBrains Mono', monospace;
  font-size: 13px; letter-spacing: .14em; color: var(--phos); text-decoration: none;
  background: transparent; cursor: pointer; transition: all .25s;
}
.btn svg { transition: transform .25s; }
.btn:hover svg { transform: translateX(4px); }
.btn:active { transform: scale(.97); }
.btn-solid { background: var(--phos); color: var(--bg); font-weight: 700; }
.btn-solid:hover { box-shadow: 0 0 28px rgba(67,233,123,.4); }
.btn-ghost:hover { background: rgba(67,233,123,.1); }

.hero-stats {
  position: absolute; right: var(--page-pad); bottom: 5vh; z-index: 3;
  display: flex; gap: 0; border: 1px solid var(--hair); background: rgba(16,21,15,.75);
  animation: bootin 1s .7s both;
}
.hstat { padding: 16px 24px; border-left: 1px solid var(--hair); }
.hstat:first-child { border-left: none; }
.hstat .v { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 22px; color: var(--phos); font-variant-numeric: tabular-nums; }
.hstat .v.am { color: var(--amber); }
.hstat .k { font-size: 11px; letter-spacing: .2em; color: var(--gray-d); margin-top: 5px; }

.hero-hint {
  position: absolute; left: var(--page-pad); bottom: 5vh; z-index: 3;
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .2em; color: var(--gray-d);
  display: flex; align-items: center; gap: 12px; animation: bootin 1s .8s both;
}
.hero-hint::before { content: ""; width: 26px; height: 1px; background: var(--gray-d); }

/* ── 跑马灯 ───────────────────────────── */
.ticker { border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); overflow: hidden; white-space: nowrap; padding: 13px 0; background: var(--panel); }
.ticker-track { display: inline-block; animation: tick 28s linear infinite; }
.ticker span { font-family: 'Noto Sans SC', sans-serif; font-size: 14px; letter-spacing: .1em; color: var(--gray); margin-right: 3.2em; }
.ticker span i { font-style: normal; color: var(--phos); }
.ticker span .stars { color: #fbbf24; margin-right: 8px; font-size: 12px;}
@keyframes tick { to { transform: translateX(-50%); } }

/* ── 通用 section ─────────────────────── */
.sec { padding: calc(6vw + 7vh) var(--page-pad); }
.sec-head { max-width: 1040px; margin: 0 auto 6.5vh; }
.sec-tag { font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .3em; color: var(--phos); margin-bottom: 20px; display: flex; align-items: center; gap: 14px; }
.sec-tag::before { content: ""; width: 32px; height: 1px; background: var(--phos); }
.sec-title { font-weight: 900; font-size: clamp(30px, 4.4vw, 54px); line-height: 1.32; }
.sec-desc { margin-top: 20px; max-width: 580px; font-size: 14.5px; line-height: 2.1; color: var(--gray); }

/* ── 测速终端 (Why Choose) ─────────────────────────── */
.term {
  max-width: 1040px; margin: 0 auto; border: 1px solid var(--hair); background: var(--panel);
  box-shadow: 0 0 60px rgba(67,233,123,.06), inset 0 0 0 1px rgba(0,0,0,.4);
}
.term-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-bottom: 1px solid var(--hair); background: var(--panel-2);
}
.term-dots { display: flex; gap: 8px; }
.term-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--gray-d); }
.term-dots i:first-child { background: var(--amber); }
.term-dots i:nth-child(2) { background: var(--phos-dim); }
.term-title { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; letter-spacing: .22em; color: var(--gray); }
.term-body {
  padding: 28px 26px; min-height: 200px;
  font-family: 'JetBrains Mono', monospace; font-size: 13.5px; line-height: 2.15;
  color: #b9cdb9; white-space: pre-wrap; word-break: break-all;
}
.term-body .g { color: var(--phos); }
.term-body .a { color: var(--amber); }
.term-body .d { color: var(--gray-d); }
.cursor { display: inline-block; width: 8px; height: 1.1em; background: var(--phos); vertical-align: -2px; animation: blink 1s steps(1) infinite; }

/* ── 特性行 ───────────────────────────── */
.feat-list { max-width: 1040px; margin: 0 auto; border-top: 1px solid var(--hair); }
.feat {
  display: grid; grid-template-columns: 70px 240px 1fr auto; gap: 3vw; align-items: center;
  padding: 4.2vh 0; border-bottom: 1px solid var(--hair); transition: background .3s; cursor: default;
}
.feat:hover { background: rgba(67,233,123,.03); }
.feat .no { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--gray-d); letter-spacing: .2em; }
.feat h3 { font-weight: 700; font-size: clamp(19px, 2vw, 25px); letter-spacing: .06em; }
.feat h3 .en { display: block; font-family: 'JetBrains Mono', monospace; font-weight: 400; font-size: 10.5px; letter-spacing: .3em; color: var(--gray-d); margin-top: 7px; }
.feat p { font-size: 13.5px; line-height: 2; color: var(--gray); max-width: 520px; }
.feat .chip {
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .12em;
  color: var(--amber); border: 1px solid rgba(255,180,84,.4); padding: 7px 14px; white-space: nowrap;
}

/* ── 下载网格 ─────────────────────────────── */
.dl-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px;
  max-width: 1040px; margin: 0 auto;
}
.dl-card {
  border: 1px solid var(--hair); background: var(--panel); padding: 30px 24px;
  text-align: center; transition: all .3s;
}
.dl-card:hover {
  background: var(--panel-2); border-color: var(--phos); transform: translateY(-4px);
}
.dl-card h3 {
  font-family: 'JetBrains Mono', monospace; font-size: 18px; color: var(--txt); margin-bottom: 10px;
}
.dl-card p { font-size: 13px; color: var(--gray); margin-bottom: 20px; }
.dl-card .btn { width: 100%; justify-content: center; }

/* ── 价格 ─────────────────────────────── */
#price { background: var(--panel); }
.plans { max-width: 1040px; margin: 0 auto; }
.plan {
  display: grid; grid-template-columns: minmax(200px,1fr) 1.3fr auto auto; gap: 3vw; align-items: center;
  border: 1px solid var(--hair); padding: 34px 38px; margin-bottom: -1px;
  background: var(--bg); transition: transform .3s, box-shadow .3s; position: relative;
}
.plan:hover { transform: translateX(6px); box-shadow: -6px 0 0 var(--phos); }
.plan.hot { border-color: rgba(255,180,84,.5); background: var(--panel-2); }
.plan.hot:hover { box-shadow: -6px 0 0 var(--amber); }
.plan .tag {
  position: absolute; top: -11px; left: 36px;
  font-family: 'JetBrains Mono', monospace; font-size: 10.5px; letter-spacing: .22em;
  background: var(--amber); color: var(--bg); padding: 4px 12px; font-weight: 700;
}
.plan h3 { font-weight: 900; font-size: 26px; letter-spacing: .05em; }
.plan .pn { font-family: 'JetBrains Mono', monospace; font-size: 10.5px; letter-spacing: .26em; color: var(--gray-d); margin-top: 7px; }
.plan ul { list-style: none; }
.plan li {
  font-size: 13px; color: var(--gray); line-height: 2.1;
  display: flex; align-items: baseline; gap: 10px;
}
.plan li::before { content: "▸"; color: var(--phos); font-size: 11px; }
.plan .pnum { text-align: right; }
.plan .pnum .n {
  font-family: 'JetBrains Mono', monospace; font-weight: 700;
  font-size: clamp(30px, 3.4vw, 44px); color: var(--txt); font-variant-numeric: tabular-nums; line-height: 1;
}
.plan .pnum .n small { font-size: .4em; color: var(--gray); letter-spacing: .1em; }
.plan .pnum .per { font-size: 11.5px; letter-spacing: .18em; color: var(--gray); margin-top: 10px; }
.plan .pnum .per b { color: var(--phos); font-weight: 400; }
.plan .buy {
  font-family: 'JetBrains Mono', monospace; font-size: 12.5px; letter-spacing: .14em;
  border: 1px solid var(--phos); color: var(--phos); background: transparent;
  padding: 14px 30px; cursor: pointer; transition: all .25s; white-space: nowrap; text-decoration: none; display: inline-block;
}
.plan .buy:hover { background: var(--phos); color: var(--bg); box-shadow: 0 0 24px rgba(67,233,123,.35); }
.plan.hot .buy { background: var(--amber); border-color: var(--amber); color: var(--bg); font-weight: 700; }
.plan.hot .buy:hover { box-shadow: 0 0 26px rgba(255,180,84,.4); }

/* ── FAQ ─────────────────────────────── */
.faq-list { max-width: 800px; margin: 0 auto; }
details { border-bottom: 1px solid var(--hair); padding: 20px 0; }
summary {
  font-size: 16px; font-weight: 500; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; color: var(--txt);
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: 'JetBrains Mono', monospace; color: var(--phos); font-size: 20px; }
details[open] summary::after { content: "-"; }
details p { margin-top: 15px; font-size: 14px; line-height: 1.8; color: var(--gray); }

/* ── CTA ──────────────────────────────── */
#cta { text-align: center; border-top: 1px solid var(--hair); }
#cta .sec-tag { justify-content: center; }
#cta .sec-title { font-size: clamp(30px, 4.8vw, 60px); }
#cta .sec-desc { margin-left: auto; margin-right: auto; }
#cta .btn { margin-top: 4.5vh; }

footer {
  border-top: 1px solid var(--hair); background: var(--panel);
  padding: 30px var(--page-pad); display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
  font-size: 12px; letter-spacing: .12em; color: var(--gray-d);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--gray); text-decoration: none; transition: color .2s; }
.footer-links a:hover { color: var(--phos); }
footer b { color: var(--gray); font-weight: 400; }
footer .mono { font-family: 'JetBrains Mono', monospace; letter-spacing: .22em; font-size: 10.5px; }
footer .led-mini { display: inline-block; width: 7px; height: 7px; background: var(--phos); box-shadow: 0 0 6px var(--phos-dim); vertical-align: 1px; margin-left: 8px; animation: blink 2.4s steps(1) infinite; }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity .9s, transform .9s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 920px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .hero-stats { position: static; margin-top: 5vh; width: max-content; }
  .hero-hint { display: none; }
  .feat { grid-template-columns: 1fr; gap: 12px; }
  .feat .chip { justify-self: start; }
  .plan { grid-template-columns: 1fr; gap: 18px; }
  .plan .pnum { text-align: left; }
  .term-body { font-size: 12px; padding: 20px 16px; }
  .footer-links { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ���� Article Content �������������������������������������������������������������� */
.breadcrumb { font-family: "JetBrains Mono", monospace; font-size: 12.5px; margin-bottom: 30px; color: var(--gray-d); }
.breadcrumb a { color: var(--phos); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.article-hero { text-align: center; padding: 18vh var(--page-pad) 8vh; background: linear-gradient(180deg, var(--panel-2) 0%, var(--bg) 100%); border-bottom: 1px solid var(--hair); }
.article-hero h1 { font-size: clamp(32px, 4vw, 54px); font-weight: 900; margin-bottom: 20px; color: var(--txt); }
.article-hero p { color: var(--gray); font-size: 16px; max-width: 600px; margin: 0 auto; line-height:1.8; }

.article-body { max-width: 800px; margin: 0 auto; padding: 40px 20px 80px; font-size: 16px; line-height: 1.9; color: var(--txt); }
.article-body h2 { font-size: 26px; margin: 50px 0 20px; color: var(--txt); border-bottom: 1px solid var(--hair); padding-bottom: 10px;}
.article-body h3 { font-size: 20px; margin: 30px 0 15px; color: var(--phos); }
.article-body p { margin-bottom: 20px; color: #c2d1c2; }
.article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 20px; color: #c2d1c2; }
.article-body li { margin-bottom: 10px; }
.article-body a { color: var(--amber); text-decoration: none; border-bottom: 1px solid var(--amber-dim); transition:all .2s; }
.article-body a:hover { color: #fff; border-color: #fff; }
.article-body blockquote { border-left: 4px solid var(--phos); padding-left: 15px; color: var(--gray); margin: 20px 0; font-style: italic; }

/* ���� Hub Grid �������������������������������������������������������������� */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; max-width: 1040px; margin: 0 auto; padding: 60px 20px 100px;}
.hub-card { border: 1px solid var(--hair); background: var(--panel); border-radius: 8px; padding: 30px; transition: all .3s; display: flex; flex-direction: column; text-decoration:none; }
.hub-card:hover { border-color: var(--phos); transform: translateY(-5px); box-shadow: 0 10px 30px rgba(67,233,123,.1); }
.hub-card h3 { font-size: 20px; color: var(--txt); margin-bottom: 15px; line-height:1.5;}
.hub-card p { font-size: 14px; color: var(--gray); flex-grow: 1; margin-bottom: 25px; line-height:1.7;}
.hub-card .btn { align-self: flex-start; }