:root {
  --bg: #070b16;
  --bg-2: #0b1020;
  --panel: rgba(255, 255, 255, .04);
  --panel-2: rgba(255, 255, 255, .07);
  --line: rgba(255, 255, 255, .1);
  --txt: #e9edf7;
  --dim: #98a4bd;
  --brand: #22d3ee;
  --brand-2: #6366f1;
  --radius: 18px;
  --wrap: 1160px;
  --ease: cubic-bezier(.22, .68, 0, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font: 16px/1.7 "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 背景光晕 ===== */
.glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(680px 420px at 18% -8%, rgba(34, 211, 238, .18), transparent 70%),
    radial-gradient(620px 400px at 88% 4%, rgba(99, 102, 241, .2), transparent 70%);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  color: #05070f;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgba(34, 211, 238, .6); }
.btn-ghost {
  padding: 13px 26px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--txt);
  font: inherit;
  cursor: pointer;
  transition: border-color .25s, background .25s;
}
.btn-ghost:hover { border-color: rgba(34, 211, 238, .5); background: var(--panel-2); }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-block { width: 100%; }

/* ===== 导航 ===== */
.nav {
  position: relative;
  z-index: 50;
  position: sticky;
  top: 0;
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.nav.scrolled {
  background: rgba(7, 11, 22, .82);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.logo-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #05070f;
  font-size: 17px;
}
.logo small { display: block; font-size: 10px; font-weight: 600; letter-spacing: .22em; color: var(--dim); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a:not(.btn) { font-size: 15px; color: var(--dim); transition: color .2s; }
.nav-links a:not(.btn):hover { color: var(--txt); }
.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.menu-btn span { display: block; width: 18px; height: 1.6px; margin: 4px auto; background: var(--txt); border-radius: 2px; transition: transform .25s, opacity .25s; }
.menu-btn.open span:nth-child(1) { transform: translateY(5.6px) rotate(45deg); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: translateY(-5.6px) rotate(-45deg); }

/* ===== 主视觉 ===== */
.hero { position: relative; z-index: 1; padding: 96px 0 80px; text-align: center; }
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--dim);
  font-size: 13px;
}
.hero .badge i {
  width: 7px; height: 7px; border-radius: 50%;
  background: #34d399; box-shadow: 0 0 0 4px rgba(52, 211, 153, .18);
}
.hero h1 {
  margin: 22px auto 0;
  max-width: 900px;
  font-size: clamp(34px, 5.6vw, 60px);
  font-weight: 800;
  letter-spacing: -.03em;
}
.hero h1 span {
  background: linear-gradient(120deg, var(--brand), var(--brand-2) 60%, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.sub {
  margin: 20px auto 0;
  max-width: 640px;
  color: var(--dim);
  font-size: 17px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 34px; }
.hero-note { margin-top: 14px; color: var(--dim); font-size: 13px; }
.plat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 30px;
}
.plat-row span {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--dim);
  font-size: 13px;
}

.stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 56px;
}
.stat {
  padding: 24px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-align: center;
}
.stat b { display: block; font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.stat b em { font-style: normal; background: linear-gradient(120deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--dim); font-size: 13.5px; }

/* ===== 区块通用 ===== */
.section { position: relative; z-index: 1; padding: 92px 0; }
.section.alt { background: linear-gradient(180deg, transparent, rgba(255, 255, 255, .022), transparent); }
.head { text-align: center; margin-bottom: 48px; }
.head .eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.head h2 { font-size: clamp(26px, 3.4vw, 38px); }
.head p { margin: 14px auto 0; max-width: 620px; color: var(--dim); }

.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: transform .3s var(--ease), border-color .3s, background .3s;
}
.card:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, .35); background: var(--panel-2); }
.card .ico {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(34, 211, 238, .18), rgba(99, 102, 241, .18));
  border: 1px solid var(--line);
}
.card .ico svg { width: 22px; height: 22px; fill: none; stroke: var(--brand); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 18px; }
.card p { margin-top: 10px; color: var(--dim); font-size: 14.5px; }

/* 更快 / 更稳 / 更简单 */
.pillars .card { padding: 32px 28px; }
.pillars .card .tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(34, 211, 238, .12);
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}
.pillars ul { margin-top: 16px; }
.pillars li {
  position: relative;
  padding-left: 20px;
  margin-top: 9px;
  color: var(--dim);
  font-size: 14.5px;
}
.pillars li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

/* 场景 */
.scene {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color .3s, transform .3s var(--ease);
}
.scene:hover { border-color: rgba(34, 211, 238, .35); transform: translateY(-4px); }
.scene b { display: block; font-size: 17px; }
.scene p { margin-top: 8px; color: var(--dim); font-size: 14.5px; }

/* 评价 */
.quote {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.quote p { color: var(--txt); font-size: 15px; }
.quote .who { display: flex; align-items: center; gap: 10px; margin-top: 18px; color: var(--dim); font-size: 13.5px; }
.quote .who i {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #05070f; font-style: normal; font-weight: 700;
}

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
}
.faq-item + .faq-item { margin-top: 12px; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 0;
  background: none;
  color: var(--txt);
  font: inherit;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.faq-q i {
  flex: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line);
  position: relative;
  transition: transform .3s var(--ease), background .3s;
}
.faq-q i::before, .faq-q i::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  background: var(--dim); transition: opacity .3s;
}
.faq-q i::before { width: 10px; height: 1.6px; }
.faq-q i::after { width: 1.6px; height: 10px; }
.faq-item.open .faq-q i { background: rgba(34, 211, 238, .15); transform: rotate(180deg); }
.faq-item.open .faq-q i::after { opacity: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s var(--ease); }
.faq-a div { padding: 0 20px 18px; color: var(--dim); font-size: 14.5px; }

/* CTA */
.cta-band {
  position: relative;
  z-index: 1;
  margin: 0 auto;
  max-width: var(--wrap);
  padding: 52px 32px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(34, 211, 238, .12), rgba(99, 102, 241, .16));
  text-align: center;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); }
.cta-band p { margin: 12px auto 26px; max-width: 520px; color: var(--dim); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ===== 页脚 ===== */
.footer { position: relative; z-index: 1; padding: 56px 0 40px; border-top: 1px solid var(--line); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between; }
.footer h4 { font-size: 14px; margin-bottom: 12px; }
.footer ul li { margin-top: 8px; }
.footer ul a { color: var(--dim); font-size: 14px; transition: color .2s; }
.footer ul a:hover { color: var(--txt); }
.footer-bottom {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 13px;
  text-align: center;
}

/* ===== 下载页 ===== */
.page-hero { position: relative; z-index: 1; padding: 72px 0 40px; text-align: center; }
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); }
.page-hero p { margin: 14px auto 0; max-width: 560px; color: var(--dim); }

.detect {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 22px;
  border: 1px solid rgba(34, 211, 238, .3);
  border-radius: 16px;
  background: rgba(34, 211, 238, .07);
  font-size: 14.5px;
}
.detect b { color: var(--brand); }

.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dl-card {
  display: flex;
  flex-direction: column;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: transform .3s var(--ease), border-color .3s;
}
.dl-card:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, .4); }
.dl-card.recommend { border-color: rgba(34, 211, 238, .45); background: rgba(34, 211, 238, .06); }
.dl-top { display: flex; align-items: center; gap: 12px; }
.dl-top .ico {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--panel-2); border: 1px solid var(--line);
}
.dl-top .ico svg { width: 21px; height: 21px; fill: none; stroke: var(--txt); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.dl-card h3 { font-size: 17px; }
.dl-card .meta { margin-top: 4px; color: var(--dim); font-size: 13px; }
.dl-card dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 18px 0 22px; font-size: 13.5px; }
.dl-card dt { color: var(--dim); }
.dl-card dd { margin: 0; text-align: right; }
.dl-card .btn { margin-top: auto; }

.table-wrap {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--dim); font-weight: 600; font-size: 13px; letter-spacing: .04em; }
tr:last-child td { border-bottom: 0; }
td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; color: var(--dim); }
.copy {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: none;
  color: var(--dim);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}
.copy:hover { color: var(--txt); border-color: rgba(34, 211, 238, .4); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.step { position: relative; padding: 26px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.step::before {
  counter-increment: s;
  content: "0" counter(s);
  display: block;
  margin-bottom: 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
}
.step b { display: block; font-size: 17px; }
.step p { margin-top: 8px; color: var(--dim); font-size: 14.5px; }

.notice {
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: 12px;
  background: var(--panel);
  color: var(--dim);
  font-size: 14px;
}

/* ===== 404 ===== */
.err-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 24px;
}
.err-code {
  font-size: clamp(96px, 22vw, 180px);
  font-weight: 800;
  line-height: .9;
  letter-spacing: -.05em;
  background: linear-gradient(120deg, var(--brand), var(--brand-2) 60%, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.err-wrap h1 { margin-top: 14px; font-size: clamp(22px, 3vw, 30px); }
.err-wrap p { margin: 14px auto 30px; max-width: 460px; color: var(--dim); }
.err-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.err-links { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin-top: 40px; }
.err-links a { color: var(--dim); font-size: 14px; transition: color .2s; }
.err-links a:hover { color: var(--brand); }

/* ===== 动画 ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translate(-50%, 16px);
  padding: 12px 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 16, 32, .95);
  backdrop-filter: blur(10px);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s var(--ease);
  z-index: 99;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .grid-3, .grid-4, .dl-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 780px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(9, 12, 26, .97);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .25s, transform .25s var(--ease), visibility .25s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a:not(.btn) { padding: 11px 8px; font-size: 16px; }
  .nav-links .btn { margin-top: 8px; }
  .menu-btn { display: block; }
  .section { padding: 72px 0; }
  .grid-3, .grid-4, .grid-2, .dl-grid, .steps { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
}

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