/* Landing — 蜘蛛流量分化 */
:root {
  --ink: #0b1210;
  --ink-2: #121c18;
  --fog: #d7e6df;
  --mist: #9bb5a8;
  --lime: #b8f24a;
  --lime-dim: #8bc034;
  --teal: #2dd4bf;
  --line: rgba(215, 230, 223, 0.12);
  --glass: rgba(18, 28, 24, 0.72);
  --font-display: "Syne", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.home {
  margin: 0;
  min-height: 100vh;
  color: var(--fog);
  font-family: var(--font-body);
  background: var(--ink);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.home-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 55% at 12% -10%, rgba(45, 212, 191, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 95% 15%, rgba(184, 242, 74, 0.12), transparent 50%),
    radial-gradient(ellipse 60% 40% at 70% 100%, rgba(45, 212, 191, 0.08), transparent 55%),
    linear-gradient(165deg, #0b1210 0%, #101a16 42%, #0a0f0d 100%);
}

.home-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(215, 230, 223, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(215, 230, 223, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
}

.home-bg::after {
  content: "";
  position: absolute;
  width: 48vmax;
  height: 48vmax;
  right: -12vmax;
  top: -8vmax;
  border-radius: 50%;
  border: 1px solid rgba(45, 212, 191, 0.18);
  box-shadow:
    0 0 0 40px rgba(45, 212, 191, 0.04),
    0 0 0 90px rgba(184, 242, 74, 0.03);
  animation: orbit-pulse 14s ease-in-out infinite;
}

@keyframes orbit-pulse {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 1; }
  50% { transform: scale(1.06) rotate(8deg); opacity: 0.75; }
}

.home-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.home-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid transparent;
}

.home-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}

.home-brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background:
    linear-gradient(135deg, var(--lime) 0%, var(--teal) 100%);
  position: relative;
  box-shadow: 0 0 24px rgba(184, 242, 74, 0.25);
}

.home-brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  border-top-color: transparent;
  border-left-color: transparent;
  transform: rotate(35deg);
}

.home-nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.home-hero {
  flex: 1;
  display: grid;
  align-content: center;
  padding: clamp(40px, 8vh, 96px) clamp(20px, 4vw, 56px) clamp(48px, 8vh, 88px);
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
}

.home-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 22px;
  opacity: 0;
  animation: rise 0.8s ease 0.1s forwards;
}

.home-kicker span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 12px var(--lime);
  animation: blink 2.4s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.home-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  max-width: 12ch;
  opacity: 0;
  animation: rise 0.9s ease 0.2s forwards;
}

.home-title em {
  font-style: normal;
  background: linear-gradient(105deg, var(--fog) 10%, var(--teal) 55%, var(--lime) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.home-lead {
  margin: 22px 0 0;
  max-width: 34rem;
  color: var(--mist);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.7;
  opacity: 0;
  animation: rise 0.9s ease 0.35s forwards;
}

.home-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
  opacity: 0;
  animation: rise 0.9s ease 0.5s forwards;
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-home:hover {
  transform: translateY(-1px);
}

.btn-home-primary {
  background: var(--lime);
  color: var(--ink);
  box-shadow: 0 10px 30px rgba(184, 242, 74, 0.22);
}

.btn-home-primary:hover {
  background: #c8ff5e;
  box-shadow: 0 14px 34px rgba(184, 242, 74, 0.3);
}

.btn-home-muted {
  background: transparent;
  color: var(--mist);
  border-color: var(--line);
  cursor: not-allowed;
  opacity: 0.72;
}

.btn-home-muted:hover {
  transform: none;
}

.btn-home-ghost {
  background: rgba(215, 230, 223, 0.04);
  border-color: var(--line);
  color: var(--fog);
}

.btn-home-ghost:hover {
  border-color: rgba(45, 212, 191, 0.45);
  background: rgba(45, 212, 191, 0.08);
}

.home-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--mist);
  opacity: 0;
  animation: rise 0.9s ease 0.65s forwards;
}

.home-note strong {
  color: var(--teal);
  font-weight: 600;
}

.home-visual {
  position: relative;
  margin-top: clamp(36px, 6vh, 64px);
  height: clamp(160px, 22vw, 260px);
  opacity: 0;
  animation: rise 1s ease 0.55s forwards;
}

.web-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.home-section {
  padding: 0 clamp(20px, 4vw, 56px) clamp(56px, 8vh, 96px);
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
}

.home-section h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.home-section p {
  margin: 0;
  max-width: 36rem;
  color: var(--mist);
  line-height: 1.75;
}

.home-footer {
  margin-top: auto;
  padding: 20px clamp(20px, 4vw, 56px) 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  color: var(--mist);
  font-size: 0.82rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .home-nav-actions .btn-home-ghost {
    display: none;
  }

  .home-title {
    max-width: none;
  }
}