:root {
  color-scheme: dark;
  --ink: #f7fbff;
  --muted: #96a8ba;
  --bg: #050b12;
  --panel: #0a131e;
  --panel-2: #0d1926;
  --line: #203246;
  --line-bright: #38546d;
  --cyan: #35ddd2;
  --cyan-soft: #9af8f1;
  --blue: #5d8fff;
  --pink: #ff527e;
  --green: #4be0a4;
  --danger: #ff7791;
  --shadow: 0 30px 90px #0009;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 78% -12%, #274f8a38 0, transparent 34rem),
    radial-gradient(circle at 7% 20%, #13676127 0, transparent 30rem),
    var(--bg);
  color: var(--ink);
  font: 400 1rem/1.68 Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .17;
  background-image:
    linear-gradient(#8fb5d00c 1px, transparent 1px),
    linear-gradient(90deg, #8fb5d00c 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 70%);
}

a { color: inherit; text-decoration: none; }
a, button, input { outline-offset: 4px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--cyan); }
button, input { font: inherit; }
.container { width: min(1180px, calc(100% - 2.5rem)); margin-inline: auto; }
.skip-link { position: fixed; top: -6rem; left: 1rem; z-index: 30; padding: .65rem 1rem; border-radius: .5rem; background: #fff; color: #050b12; }
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid #ffffff10;
  background: #050b12e8;
  backdrop-filter: blur(20px);
}
.site-nav { min-height: 4.75rem; display: flex; align-items: center; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: .72rem; flex: 0 0 auto; }
.brand-mark {
  position: relative;
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  overflow: hidden;
  border-radius: .72rem;
  background: linear-gradient(145deg, var(--cyan) 0 44%, #f0ffff 44% 51%, var(--pink) 51%);
  box-shadow: 0 0 30px #35ddd22e;
}
.brand-mark::after { content: "Y"; color: #061019; font-size: .9rem; font-weight: 950; }
.brand-copy b, .brand-copy small { display: block; }
.brand-copy b { font-size: 1.06rem; letter-spacing: .02em; }
.brand-copy small { margin-top: -.18rem; color: var(--muted); font-size: .67rem; letter-spacing: .04em; }
.nav-links { display: flex; align-items: center; gap: 1.55rem; margin-left: auto; color: #b8c5d0; font-size: .88rem; }
.nav-links a { transition: color .16s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--cyan-soft); }
.auth-actions { display: flex; align-items: center; gap: .65rem; }
.login-link { padding: .6rem .4rem; color: #eaf2f8; font-size: .9rem; font-weight: 750; }
.login-link:hover { color: var(--cyan-soft); }
.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: .65rem 1.05rem;
  border: 1px solid var(--line-bright);
  border-radius: .72rem;
  background: #111d29;
  color: #f8fbff;
  font-weight: 800;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}
.button:hover { transform: translateY(-1px); border-color: #5c7890; background: #162635; }
.button-primary { border-color: transparent; background: linear-gradient(135deg, var(--cyan), var(--blue)); color: #04131a; box-shadow: 0 14px 34px #35ddd225; }
.button-primary:hover { background: linear-gradient(135deg, #67eee6, #86aaff); }
.button-quiet { background: transparent; }

.hero { min-height: calc(100svh - 4.75rem); display: grid; align-items: center; padding: clamp(4.5rem, 10vw, 8rem) 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(19rem, .82fr); gap: clamp(3rem, 9vw, 8rem); align-items: center; }
.eyebrow { display: flex; align-items: center; gap: .7rem; margin: 0 0 1.4rem; color: var(--cyan-soft); font-size: .76rem; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 2.5rem; height: 1px; background: linear-gradient(90deg, var(--cyan), transparent); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { max-width: 11ch; margin: 0; font-size: clamp(3.1rem, 7.8vw, 6.6rem); line-height: .98; letter-spacing: -.065em; }
.hero .lead { max-width: 42rem; margin: 1.7rem 0 0; color: #b9c8d3; font-size: clamp(1.04rem, 2vw, 1.22rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.1rem; }
.fine-print { max-width: 42rem; margin: 1.25rem 0 0; color: #7f94a6; font-size: .79rem; }

.signal-panel {
  position: relative;
  min-height: 31rem;
  padding: 1.15rem;
  overflow: hidden;
  border: 1px solid #33516b;
  border-radius: 1.6rem;
  background: linear-gradient(160deg, #0e1c2b, #070e16);
  box-shadow: var(--shadow);
}
.signal-panel::before { content: ""; position: absolute; width: 18rem; height: 18rem; right: -7rem; top: -8rem; border: 1px solid #5d8fff58; border-radius: 50%; box-shadow: 0 0 90px #5d8fff28; }
.signal-head { display: flex; justify-content: space-between; align-items: center; padding: .3rem .35rem 1rem; color: var(--muted); font-size: .75rem; }
.signal-head span:last-child { color: var(--green); }
.signal-stack { display: grid; gap: .75rem; }
.signal-card { padding: 1.05rem; border: 1px solid var(--line); border-radius: 1rem; background: #08111aeb; }
.signal-card small { display: block; color: #7890a3; font-size: .72rem; }
.signal-card strong { display: block; margin-top: .3rem; font-size: 1rem; }
.signal-line { position: relative; height: .42rem; margin-top: 1rem; overflow: hidden; border-radius: 99px; background: #1e2d3a; }
.signal-line i { display: block; width: 72%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--cyan), var(--blue)); }
.signal-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .55rem; margin-top: .75rem; }
.signal-stat { padding: .8rem .65rem; border: 1px solid #1d3041; border-radius: .8rem; background: #0d1925; }
.signal-stat b, .signal-stat span { display: block; }
.signal-stat b { color: var(--cyan-soft); font-size: .9rem; }
.signal-stat span { margin-top: .1rem; color: var(--muted); font-size: .65rem; }

.home-links { padding: 0 0 clamp(5rem, 9vw, 8rem); }
.link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.route-card {
  min-height: 15rem;
  padding: 1.55rem;
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  background: linear-gradient(150deg, #0e1a26, #08111a);
  transition: transform .18s ease, border-color .18s ease;
}
.route-card:hover { transform: translateY(-4px); border-color: #4a718d; }
.route-card .number { color: var(--cyan-soft); font: 800 .78rem/1 ui-monospace, monospace; }
.route-card h2, .route-card h3 { margin: 4.3rem 0 .6rem; font-size: 1.35rem; letter-spacing: -.025em; }
.route-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.route-card .arrow { display: block; margin-top: 1rem; color: #dffefa; font-size: .84rem; font-weight: 800; }

.trust-strip { padding: 2rem 0; border-block: 1px solid #ffffff10; background: #09131ce0; }
.trust-row { display: grid; grid-template-columns: 1.1fr repeat(3, .65fr); gap: 1.5rem; align-items: center; }
.trust-row strong { font-size: 1.05rem; }
.trust-item { color: var(--muted); font-size: .82rem; }
.trust-item b { display: block; color: #dbe8f1; font-size: .86rem; }

.page-hero { padding: clamp(5.5rem, 10vw, 8.5rem) 0 clamp(3.5rem, 7vw, 5.5rem); border-bottom: 1px solid #ffffff0d; }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(17rem, .5fr); gap: 3rem; align-items: end; }
.page-hero h1 { max-width: 13ch; font-size: clamp(2.8rem, 6vw, 5.4rem); }
.page-hero .lead { max-width: 42rem; margin: 1.4rem 0 0; color: #b3c3cf; font-size: 1.08rem; }
.page-note { padding: 1.2rem; border-left: 2px solid var(--cyan); background: #0d1c27; color: #b8c9d4; font-size: .86rem; }
.section { padding: clamp(4.5rem, 8vw, 7rem) 0; }
.section-heading { max-width: 48rem; margin-bottom: 2.4rem; }
.section-heading h2 { margin: 0; font-size: clamp(2rem, 4.6vw, 3.7rem); line-height: 1.08; letter-spacing: -.045em; }
.section-heading p { margin: 1rem 0 0; color: var(--muted); }
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.capability-card { min-height: 17rem; padding: 1.6rem; border: 1px solid var(--line); border-radius: 1.1rem; background: #0a141e; }
.capability-card .tag { color: var(--cyan-soft); font: 800 .72rem/1 ui-monospace, monospace; letter-spacing: .08em; }
.capability-card h2, .capability-card h3 { margin: 3.8rem 0 .65rem; font-size: 1.4rem; }
.capability-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.capability-card ul { margin: .9rem 0 0; padding-left: 1.1rem; color: #a9bbc8; font-size: .86rem; }
.capability-card li + li { margin-top: .35rem; }
.boundary { display: grid; grid-template-columns: .8fr 1.2fr; gap: 2rem; padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid #2f5364; border-radius: 1.25rem; background: linear-gradient(130deg, #0c2229, #0d1724); }
.boundary h2 { margin: 0; font-size: 1.65rem; }
.boundary p { margin: 0; color: #b3c4cf; }

.showcase-list { display: grid; gap: 1.5rem; }
.showcase-block { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(2rem, 7vw, 6rem); align-items: center; padding: clamp(1.4rem, 4vw, 2.4rem); border: 1px solid var(--line); border-radius: 1.35rem; background: #08111a; }
.showcase-block:nth-child(even) { grid-template-columns: 1.3fr .7fr; }
.showcase-block:nth-child(even) .showcase-copy { order: 2; }
.showcase-copy .tag { color: var(--cyan-soft); font-size: .75rem; font-weight: 850; letter-spacing: .1em; }
.showcase-copy h2 { margin: .8rem 0; font-size: clamp(1.7rem, 3.5vw, 2.7rem); line-height: 1.12; }
.showcase-copy p { margin: 0; color: var(--muted); }
.ui-frame { padding: .8rem; border: 1px solid #365168; border-radius: 1rem; background: #0e1b28; box-shadow: 0 20px 50px #0005; }
.ui-top { display: flex; justify-content: space-between; padding: .3rem .2rem .85rem; color: #8094a5; font-size: .68rem; }
.ui-row { display: grid; grid-template-columns: 1.2fr .8fr .6fr; gap: .5rem; padding: .75rem; border: 1px solid #1f3344; border-radius: .72rem; background: #08121b; font-size: .76rem; }
.ui-row + .ui-row { margin-top: .5rem; }
.ui-row span { color: var(--muted); }
.ui-row b { color: #eaf5fb; }
.ui-pill { justify-self: end; padding: .18rem .48rem; border-radius: 99px; background: #15372f; color: #8ef1c7 !important; font-size: .65rem; }
.ui-fields { display: grid; grid-template-columns: 1fr 1fr; gap: .55rem; }
.ui-field { min-height: 3.2rem; padding: .7rem; border: 1px solid #21384b; border-radius: .65rem; background: #07111a; color: #7f93a4; font-size: .7rem; }
.ui-field.wide { grid-column: 1 / -1; min-height: 5rem; }

.timeline { position: relative; display: grid; gap: 1rem; max-width: 58rem; margin-left: auto; }
.timeline::before { content: ""; position: absolute; top: 2rem; bottom: 2rem; left: 1.55rem; width: 1px; background: linear-gradient(var(--cyan), #365b73, transparent); }
.timeline-step { position: relative; display: grid; grid-template-columns: 3.2rem 1fr; gap: 1rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 1rem; background: #09131d; }
.timeline-step > b { z-index: 1; display: grid; width: 3.1rem; height: 3.1rem; place-items: center; border: 1px solid #3d6d75; border-radius: 50%; background: #0d2830; color: var(--cyan-soft); }
.timeline-step h2, .timeline-step h3 { margin: .15rem 0 .3rem; font-size: 1.15rem; }
.timeline-step p { margin: 0; color: var(--muted); font-size: .9rem; }
.workflow-layout { display: grid; grid-template-columns: .55fr 1.45fr; gap: clamp(2rem, 8vw, 7rem); align-items: start; }
.workflow-intro { position: sticky; top: 7rem; }
.workflow-intro h2 { margin: 0; font-size: 2rem; }
.workflow-intro p { color: var(--muted); }

.security-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.security-card { padding: 1.45rem; border-top: 2px solid #31576c; background: #0a141e; }
.security-card h2, .security-card h3 { margin: .4rem 0 .55rem; font-size: 1.12rem; }
.security-card p { margin: 0; color: var(--muted); font-size: .86rem; }

.cta { padding: clamp(4rem, 8vw, 7rem) 0; }
.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: clamp(1.7rem, 5vw, 3.5rem); border: 1px solid #31576d; border-radius: 1.35rem; background: linear-gradient(120deg, #0b252b, #101b32); }
.cta-panel h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.04em; }
.cta-panel p { margin: .5rem 0 0; color: var(--muted); }

.auth-page { min-height: 100svh; display: grid; grid-template-rows: auto 1fr auto; }
.auth-main { display: grid; place-items: center; padding: 3.5rem 0 5rem; }
.auth-shell { width: min(31rem, calc(100% - 2rem)); }
.auth-heading { margin-bottom: 1.4rem; text-align: center; }
.auth-heading h1 { max-width: none; font-size: clamp(2.15rem, 6vw, 3.3rem); line-height: 1.05; }
.auth-heading p { margin: .8rem 0 0; color: var(--muted); }
.auth-card { padding: clamp(1.3rem, 5vw, 2rem); border: 1px solid var(--line-bright); border-radius: 1.2rem; background: #0b1520f2; box-shadow: var(--shadow); }
.auth-form { display: grid; gap: 1rem; }
.field label, .field-label { display: block; margin-bottom: .4rem; color: #dce6ed; font-size: .86rem; font-weight: 700; }
.field input {
  width: 100%;
  min-height: 3.15rem;
  padding: .72rem .82rem;
  border: 1px solid #2a4053;
  border-radius: .68rem;
  background: #060e16;
  color: var(--ink);
}
.field input:focus { border-color: var(--cyan); }
.field small { display: block; margin-top: .35rem; color: #73899c; font-size: .72rem; }
.password-wrap { position: relative; }
.password-wrap input { padding-right: 4.2rem; }
.password-toggle { position: absolute; right: .4rem; top: .42rem; min-height: 2.3rem; border: 0; background: transparent; color: #91a6b7; cursor: pointer; }
.check-row { display: grid; grid-template-columns: auto 1fr; gap: .6rem; align-items: start; color: #aebfca; font-size: .78rem; }
.check-row input { width: 1rem; height: 1rem; margin-top: .22rem; accent-color: var(--cyan); }
.check-row a { color: var(--cyan-soft); text-decoration: underline; }
.auth-submit { width: 100%; margin-top: .2rem; }
.auth-message { display: none; padding: .75rem .85rem; border: 1px solid #ff71855f; border-radius: .7rem; background: #ff527e12; color: #ffacba; font-size: .82rem; }
.auth-message.show { display: block; }
.auth-message.success { border-color: #4be0a455; background: #4be0a412; color: #9af0ca; }
.auth-switch { margin: 1rem 0 0; color: var(--muted); text-align: center; font-size: .82rem; }
.auth-switch a { color: var(--cyan-soft); font-weight: 800; }
.auth-trust { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); color: #7f94a6; font-size: .74rem; }
.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

.site-footer { padding: 3.2rem 0; border-top: 1px solid #ffffff0d; color: #7f92a3; font-size: .76rem; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 2.5rem; }
.footer-brand p { max-width: 29rem; margin: .8rem 0 0; }
.footer-title { margin-bottom: .7rem; color: #dce7ee; font-size: .82rem; font-weight: 800; }
.footer-links { display: grid; gap: .45rem; }
.footer-links a:hover { color: var(--cyan-soft); }
.footer-legal { grid-column: 1 / -1; padding-top: 1.4rem; border-top: 1px solid #ffffff0d; color: #6f8292; }

@media (max-width: 920px) {
  .site-nav { flex-wrap: wrap; gap: .65rem 1rem; padding-block: .55rem; }
  .nav-links {
    order: 3;
    display: flex;
    width: 100%;
    margin-left: 0;
    padding: .35rem 0 .45rem;
    gap: 1.2rem;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: thin;
  }
  .hero-grid, .page-hero-grid, .workflow-layout, .boundary { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .signal-panel { max-width: 42rem; min-height: 27rem; }
  .workflow-intro { position: static; }
  .showcase-block, .showcase-block:nth-child(even) { grid-template-columns: 1fr; }
  .showcase-block:nth-child(even) .showcase-copy { order: initial; }
  .trust-row { grid-template-columns: 1fr 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 1.35rem, 1180px); }
  .site-nav { min-height: 4.2rem; gap: .7rem; }
  .brand-copy small { display: none; }
  .auth-actions { margin-left: auto; gap: .35rem; }
  .login-link { padding-inline: .3rem; font-size: .82rem; }
  .auth-actions .button { min-height: 2.35rem; padding: .48rem .72rem; font-size: .8rem; }
  .hero { padding: 4.6rem 0; }
  .hero-grid { gap: 2.5rem; }
  h1 { font-size: clamp(2.8rem, 16vw, 4.5rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .signal-panel { min-height: auto; }
  .signal-stats { grid-template-columns: 1fr; }
  .link-grid, .capability-grid { grid-template-columns: 1fr; }
  .route-card { min-height: 12rem; }
  .route-card h2, .route-card h3 { margin-top: 2.7rem; }
  .trust-row { grid-template-columns: 1fr; }
  .ui-fields { grid-template-columns: 1fr; }
  .ui-field.wide { grid-column: auto; }
  .ui-row { grid-template-columns: 1fr; }
  .ui-pill { justify-self: start; }
  .cta-panel { align-items: stretch; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-legal { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}