:root {
  /* Neutral-first dark palette (less neon, more print-like) */
  --bg: #0f1115;
  --bg-elev: #151922;
  --text: #f2f4f8;
  --muted: rgba(242, 244, 248, 0.66);
  --line: rgba(242, 244, 248, 0.10);
  --line-strong: rgba(242, 244, 248, 0.16);

  /* Single brand accent (kept for consistency across pages) */
  --accent: #4f46e5;
  --accent-2: #4f46e5;

  --shadow: 0 12px 42px rgba(0, 0, 0, 0.52);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35), 0 10px 26px rgba(0, 0, 0, 0.30);
  --focus-ring: 0 0 0 3px rgba(79, 70, 229, 0.26);

  --radius: 14px;
  --radius-sm: 12px;
  --container: 1200px;
  --ease-out: cubic-bezier(0.16, 1, 0.30, 1);
  --dur-1: 140ms;
  --dur-2: 220ms;
  --dur-3: 360ms;
}

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

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  /* Subtle neutral vignette (avoid colored glows) */
  background:
    radial-gradient(1200px 700px at 50% -20%, rgba(255, 255, 255, 0.04), transparent 60%),
    var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  letter-spacing: 0.005em;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  transform: translateY(-140%);
  transition: transform var(--dur-2) var(--ease-out);
  z-index: 9999;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: rgba(15, 17, 21, 0.72);
  backdrop-filter: blur(12px);
}

.site-header.is-elevated {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background-color: rgba(242, 244, 248, 0.06);
  background-image: url("../图标/Web%20App/favicon-32.png");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(242, 244, 248, 0.14);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-name {
  font-weight: 650;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-size: 14px;
  color: rgba(242, 244, 248, 0.86);
  padding: 8px 10px;
  border-radius: 10px;
  transition: background var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

.nav-link:hover {
  background: rgba(242, 244, 248, 0.06);
  color: var(--text);
}

.nav-link[aria-current="page"] {
  background: rgba(242, 244, 248, 0.08);
  border: 1px solid rgba(242, 244, 248, 0.12);
  color: var(--text);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  border-radius: 12px;
  padding: 10px 14px;
  border: 1px solid transparent;
  transition: transform var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
  will-change: transform;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: rgba(242, 244, 248, 0.94);
  color: #0f1115;
  border-color: rgba(242, 244, 248, 0.16);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.34);
}

.btn-primary:hover {
  background: rgba(242, 244, 248, 1);
}

.btn-secondary {
  background: rgba(242, 244, 248, 0.08);
  border-color: rgba(242, 244, 248, 0.14);
}

.btn-secondary:hover {
  background: rgba(242, 244, 248, 0.12);
  border-color: rgba(242, 244, 248, 0.18);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(242, 244, 248, 0.12);
}

.btn-ghost:hover {
  background: rgba(242, 244, 248, 0.06);
  border-color: rgba(242, 244, 248, 0.16);
}

.btn-block {
  width: 100%;
}

.icon-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(242, 244, 248, 0.06);
  border: 1px solid rgba(242, 244, 248, 0.12);
  color: var(--text);
}

.icon-btn:hover {
  background: rgba(242, 244, 248, 0.10);
}

.icon-btn-bars {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  position: relative;
  border-radius: 999px;
}

.icon-btn-bars::before,
.icon-btn-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.icon-btn-bars::before {
  top: -6px;
}

.icon-btn-bars::after {
  top: 6px;
}

.mobile-menu {
  border-bottom: 1px solid var(--line);
  background: rgba(15, 17, 21, 0.92);
  backdrop-filter: blur(18px);
}

.mobile-menu-inner {
  padding: 14px 0 18px;
  display: grid;
  gap: 10px;
}

.mobile-link {
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(242, 244, 248, 0.10);
  background: rgba(242, 244, 248, 0.04);
}

.mobile-link[aria-current="page"] {
  border-color: rgba(242, 244, 248, 0.18);
  background: rgba(242, 244, 248, 0.06);
}

.mobile-cta {
  display: grid;
  gap: 10px;
  margin-top: 6px;
}

.hero {
  padding: 78px 0 46px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
  align-items: center;
}

.eyebrow {
  color: rgba(242, 244, 248, 0.72);
  letter-spacing: 0.04em;
  font-size: 12px;
  margin: 0 0 14px;
}

.hero-title {
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.hero-desc {
  margin: 0 0 22px;
  color: rgba(242, 244, 248, 0.78);
  font-size: 16px;
  max-width: 56ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0;
}

.metric {
  padding: 14px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(242, 244, 248, 0.10);
  background: rgba(242, 244, 248, 0.04);
}

.metric dt {
  font-size: 12px;
  color: var(--muted);
}

.metric dd {
  margin: 6px 0 0;
  font-size: 14px;
  font-weight: 650;
}

.hero-panel {
  position: relative;
}

.panel-surface {
  position: relative;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(242, 244, 248, 0.12);
  background: rgba(242, 244, 248, 0.04);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.panel-title {
  display: grid;
  gap: 2px;
  margin-bottom: 14px;
}

.panel-kicker {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(242, 244, 248, 0.62);
}

.panel-heading {
  font-size: 18px;
  font-weight: 680;
}

.panel-divider {
  height: 1px;
  background: var(--line);
  margin: 14px 0;
}

.panel-foot {
  display: flex;
  justify-content: flex-end;
}

.panel-glow {
  /* Remove neon glow layer for a more human-designed look */
  display: none;
}

.product-card {
  display: grid;
  gap: 10px;
  padding: 14px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(242, 244, 248, 0.12);
  background: rgba(242, 244, 248, 0.04);
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: rgba(242, 244, 248, 0.18);
  background: rgba(242, 244, 248, 0.06);
}

.product-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.product-name {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge {
  font-size: 12px;
  color: rgba(242, 244, 248, 0.74);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(242, 244, 248, 0.12);
  background: rgba(15, 17, 21, 0.55);
}

.product-desc {
  color: rgba(242, 244, 248, 0.74);
  font-size: 14px;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(242, 244, 248, 0.12);
  background: rgba(242, 244, 248, 0.04);
  color: rgba(242, 244, 248, 0.82);
}

.link {
  color: rgba(242, 244, 248, 0.88);
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.link:hover {
  background: rgba(242, 244, 248, 0.06);
  border-color: rgba(242, 244, 248, 0.10);
}

.section {
  position: relative;
  padding: 56px 0;
  background-image: radial-gradient(1000px 260px at var(--rhythm-x, 18%) 0%, rgba(242, 244, 248, 0.028), transparent 60%);
  background-repeat: no-repeat;
}

main > section {
  position: relative;
}

main > section:nth-of-type(even) {
  --rhythm-x: 82%;
}

main > section + section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(242, 244, 248, 0.10), transparent);
  pointer-events: none;
}

.section-muted {
  background: rgba(242, 244, 248, 0.018);
  background-image: radial-gradient(1100px 300px at var(--rhythm-x, 18%) 0%, rgba(242, 244, 248, 0.032), transparent 62%);
}

/* Optional typewriter effect (opt-in via data attributes) */
[data-typewriter] {
  --tw-caret: rgba(242, 244, 248, 0.52);
}

[data-typewriter].is-typewriting::after {
  content: "";
  display: inline-block;
  width: 0.08em;
  height: 1em;
  margin-left: 0.10em;
  background: var(--tw-caret);
  vertical-align: -0.14em;
  animation: tw-blink 900ms steps(1, end) infinite;
}

@keyframes tw-blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.section-head {
  max-width: 72ch;
  margin-bottom: 26px;
}

.section-title {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.section-desc {
  margin: 0;
  color: rgba(242, 244, 248, 0.74);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.card {
  border-radius: var(--radius);
  border: 1px solid rgba(242, 244, 248, 0.12);
  background: rgba(242, 244, 248, 0.04);
  padding: 18px;
}

.card-tall {
  padding: 22px;
}

.card-title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 680;
  letter-spacing: 0.01em;
}

.card-desc {
  margin: 0;
  color: rgba(242, 244, 248, 0.72);
}

.hr {
  height: 1px;
  background: rgba(242, 244, 248, 0.08);
  margin: 16px 0;
}

.list {
  margin: 0;
  padding-left: 18px;
  color: rgba(242, 244, 248, 0.78);
}

.steps {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.step {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(242, 244, 248, 0.10);
  background: rgba(242, 244, 248, 0.03);
}

.step-no {
  font-size: 22px;
  font-weight: 760;
  letter-spacing: -0.02em;
  color: rgba(242, 244, 248, 0.84);
}

.step-title {
  font-size: 16px;
  font-weight: 680;
}

.step-desc {
  color: rgba(242, 244, 248, 0.70);
  margin-top: 6px;
  font-size: 14px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.section-cta {
  padding: 42px 0 70px;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid rgba(242, 244, 248, 0.14);
  background: rgba(242, 244, 248, 0.03);
  box-shadow: var(--shadow-sm);
}

.cta-title {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.cta-desc {
  margin: 0;
  color: rgba(242, 244, 248, 0.74);
}

.cta-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-footer {
  border-top: 1px solid rgba(242, 244, 248, 0.10);
  background: rgba(21, 25, 34, 0.42);
  padding: 36px 0 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 18px;
  align-items: start;
}

.brand-inline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.footer-desc {
  margin: 0;
  color: rgba(242, 244, 248, 0.68);
  max-width: 42ch;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-content: start;
}

.footer-links-group {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.footer-links-title {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(242, 244, 248, 0.62);
  margin-bottom: 2px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  color: rgba(242, 244, 248, 0.78);
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

.footer-link:hover {
  color: var(--text);
  background: rgba(242, 244, 248, 0.06);
  border-color: rgba(242, 244, 248, 0.10);
}

.footer-link[aria-current="page"] {
  background: rgba(242, 244, 248, 0.08);
  border-color: rgba(242, 244, 248, 0.12);
  color: var(--text);
}

.footer-meta-title {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(242, 244, 248, 0.62);
  margin-bottom: 10px;
}

.footer-meta-item {
  color: rgba(242, 244, 248, 0.72);
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-bottom {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid rgba(242, 244, 248, 0.06);
  color: rgba(242, 244, 248, 0.56);
  font-size: 13px;
}

.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-label {
  font-size: 12px;
  color: rgba(242, 244, 248, 0.74);
  letter-spacing: 0.02em;
}

.input,
.textarea {
  width: 100%;
  color: var(--text);
  background: rgba(15, 17, 21, 0.70);
  border: 1px solid rgba(242, 244, 248, 0.12);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
  transition: border-color var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}

.textarea {
  resize: vertical;
  min-height: 120px;
}

.input:focus,
.textarea:focus {
  border-color: rgba(79, 70, 229, 0.55);
  background: rgba(15, 17, 21, 0.82);
}

.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: rgba(242, 244, 248, 0.72);
  font-size: 13px;
  line-height: 1.4;
}

.check-input {
  margin-top: 2px;
  accent-color: var(--accent);
}

.link-inline {
  color: rgba(242, 244, 248, 0.88);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.link-inline:hover {
  color: var(--text);
}

.form-note {
  margin: 0;
  color: rgba(242, 244, 248, 0.56);
  font-size: 12px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
}

/* When anime.js drives motion, avoid double transitions fighting each other. */
html.has-anime [data-reveal].is-visible {
  transition: none;
}

html.has-anime .btn {
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

html.has-anime .btn:active {
  transform: none;
}

html.has-anime .product-card {
  transition: border-color var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}

html.has-anime .product-card:hover {
  transform: none;
}

/* Native View Transitions (MPA) where supported; keeps motion subtle and hardware-accelerated. */
@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 220ms;
  animation-timing-function: cubic-bezier(0.16, 1, 0.30, 1);
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
  @view-transition {
    navigation: none;
  }
  [data-typewriter].is-typewriting::after {
    animation: none;
    opacity: 0;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
  [data-reveal].is-visible {
    transition: none;
  }
  .btn,
  .product-card {
    transition: none;
  }
}

@media (max-width: 920px) {
  /* Header: keep one clear action + menu to avoid cramped “模板式”三按钮布局 */
  .header-inner {
    padding: 10px 0;
    gap: 12px;
  }
  .brand {
    min-width: 0;
    gap: 10px;
  }
  .brand-mark {
    width: 30px;
    height: 30px;
    border-radius: 10px;
  }
  .brand-sub {
    display: none;
  }
  .brand-name {
    font-size: 14px;
    letter-spacing: 0.01em;
  }
  .header-actions {
    gap: 8px;
  }
  .header-actions .btn {
    padding: 9px 10px;
    border-radius: 10px;
    font-size: 13px;
  }
  .header-actions .btn-ghost {
    display: none;
  }
  .icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }
  .nav {
    display: none;
  }
  .icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-menu-inner {
    gap: 8px;
    padding: 10px 0 14px;
  }
  .mobile-link {
    padding: 12px 2px;
    border-radius: 0;
    border: 0;
    background: transparent;
    border-bottom: 1px solid rgba(242, 244, 248, 0.08);
  }
  .mobile-link[aria-current="page"] {
    background: transparent;
    border-bottom-color: rgba(242, 244, 248, 0.14);
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .hero {
    padding-top: 54px;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-links {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions {
    width: 100%;
    justify-content: flex-start;
  }
}

/* Ultra-small phones: keep header minimal (brand + menu), move CTA into the menu */
@media (max-width: 520px) {
  .header-actions .btn-primary {
    display: none;
  }
}