:root {
  color-scheme: light;
  --bg: #f8faff;
  --surface: #ffffff;
  --surface-soft: #f1f5ff;
  --text: #17233d;
  --text-soft: #66728a;
  --line: #e2e8f4;
  --blue: #2f72f5;
  --blue-dark: #1758d6;
  --blue-soft: #eaf1ff;
  --violet: #7257e8;
  --cyan: #21a9c9;
  --shadow-sm: 0 12px 30px rgba(34, 69, 133, 0.08);
  --shadow-lg: 0 28px 80px rgba(34, 69, 133, 0.16);
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 32px;
  --container: 1160px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1020;
  --surface: #121a2e;
  --surface-soft: #18233d;
  --text: #f3f6ff;
  --text-soft: #a8b3c9;
  --line: #25324d;
  --blue: #5c91ff;
  --blue-dark: #7aa5ff;
  --blue-soft: #18294c;
  --shadow-sm: 0 12px 30px rgba(0, 0, 0, 0.16);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei",
    system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
input {
  font: inherit;
}

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

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--surface);
  transform: translateY(-150%);
}

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

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(145deg, #64a3ff, #256bf0 58%, #5a4fe0);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    0 8px 18px rgba(47, 114, 245, 0.22);
  color: #fff;
  font-size: 17px;
  font-weight: 850;
  place-items: center;
}

.desktop-nav {
  display: flex;
  gap: 34px;
  align-items: center;
}

.desktop-nav a {
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 600;
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}

.desktop-nav a:hover {
  color: var(--blue);
  transform: translateY(-1px);
}

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

.icon-button {
  display: grid;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  place-items: center;
  transition: 0.2s ease;
}

.icon-button:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.icon-button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.moon-icon,
[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="dark"] .moon-icon {
  display: block;
}

.button {
  display: inline-flex;
  justify-content: center;
  gap: 9px;
  align-items: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 13px;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible,
.icon-button:focus-visible,
summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--blue) 35%, transparent);
  outline-offset: 3px;
}

.button svg {
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.button-small {
  min-height: 40px;
  padding: 0 18px;
  border-radius: 11px;
  font-size: 14px;
}

.button-large {
  min-height: 54px;
  padding: 0 28px;
}

.button-primary {
  background: linear-gradient(135deg, #367bf7, #2466e8);
  color: #fff;
  box-shadow: 0 12px 24px rgba(47, 114, 245, 0.24);
}

.button-primary:hover {
  box-shadow: 0 16px 30px rgba(47, 114, 245, 0.32);
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.button-light {
  background: #fff;
  color: #285bb9;
  box-shadow: 0 14px 32px rgba(15, 46, 105, 0.2);
}

.hero {
  position: relative;
  min-height: 690px;
  overflow: hidden;
  padding: 86px 0 78px;
}

.hero::before {
  position: absolute;
  top: 0;
  right: -12%;
  width: 60%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(76, 128, 246, 0.16) 1px, transparent 1px);
  background-size: 24px 24px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-glow-left {
  top: 30px;
  left: -180px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(153, 188, 255, 0.34), transparent 70%);
}

.hero-glow-right {
  right: -180px;
  bottom: -170px;
  width: 540px;
  height: 540px;
  background: radial-gradient(circle, rgba(101, 73, 230, 0.18), transparent 70%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 54px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  margin-bottom: 20px;
  padding: 8px 13px;
  border: 1px solid color-mix(in srgb, var(--blue) 20%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--blue-soft) 80%, transparent);
  color: var(--blue);
  font-size: 13px;
  font-weight: 750;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--blue) 15%, transparent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 5.1vw, 70px);
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.hero h1 span {
  background: linear-gradient(120deg, #286bf0 5%, #6c53e8 90%);
  background-clip: text;
  color: transparent;
}

.hero-description {
  max-width: 540px;
  margin: 25px 0 30px;
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 13px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 26px;
  color: var(--text-soft);
  font-size: 13px;
}

.hero-meta span {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.hero-meta svg {
  width: 17px;
  fill: none;
  stroke: #35a56c;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.5;
}

.hero-visual {
  position: relative;
  min-width: 0;
  padding: 42px 0 34px;
}

.visual-orbit {
  position: absolute;
  border: 1px solid rgba(73, 126, 244, 0.2);
  border-radius: 50%;
}

.orbit-one {
  inset: -10% 5% -7%;
  transform: rotate(-13deg);
}

.orbit-two {
  inset: 3% -2% 3% 10%;
  transform: rotate(18deg);
}

.app-card {
  position: relative;
  z-index: 2;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 22px;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow:
    0 34px 80px rgba(44, 78, 145, 0.19),
    0 10px 30px rgba(47, 114, 245, 0.1);
  transform: perspective(1200px) rotateY(-3deg) rotateX(1deg);
  backdrop-filter: blur(20px);
}

[data-theme="dark"] .app-card {
  border-color: rgba(125, 153, 210, 0.2);
}

.app-card-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}

.window-controls {
  display: flex;
  gap: 6px;
}

.window-controls span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #d4dbe8;
}

.window-controls span:first-child {
  background: #ff6b66;
}

.window-controls span:nth-child(2) {
  background: #ffc557;
}

.window-controls span:nth-child(3) {
  background: #45ca72;
}

.app-card-title {
  display: flex;
  gap: 7px;
  align-items: center;
  font-size: 12px;
  font-weight: 750;
}

.mini-brand-mark {
  display: grid;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(145deg, #64a3ff, #286ef2);
  color: #fff;
  font-size: 9px;
  place-items: center;
}

.app-status {
  justify-self: end;
  color: #319366;
  font-size: 10px;
  font-weight: 700;
}

.app-card-body {
  display: grid;
  grid-template-columns: 128px 1fr;
  min-height: 350px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 12px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-soft) 56%, transparent);
}

.sidebar-item {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 10px;
  border-radius: 9px;
  color: var(--text-soft);
  font-size: 10px;
  font-weight: 650;
}

.sidebar-item i {
  width: 8px;
  height: 8px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
}

.sidebar-item.active {
  background: var(--blue-soft);
  color: var(--blue);
}

.workspace {
  min-width: 0;
  padding: 22px;
}

.workspace-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.workspace-head strong {
  display: block;
  font-size: 15px;
}

.workspace-head small,
.document-row small,
.floating-chip small {
  display: block;
  margin-top: 4px;
  color: var(--text-soft);
  font-size: 9px;
}

.workspace-head > span {
  padding: 5px 8px;
  border-radius: 7px;
  background: var(--surface-soft);
  color: var(--text-soft);
  font-size: 9px;
}

.document-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  margin-top: 20px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
}

.document-row.selected {
  border-color: color-mix(in srgb, var(--blue) 36%, var(--line));
  background: color-mix(in srgb, var(--blue-soft) 48%, transparent);
}

.document-row strong {
  display: block;
  overflow: hidden;
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-icon {
  display: grid;
  width: 30px;
  height: 34px;
  border-radius: 6px;
  background: #367bf7;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  place-items: center;
}

.progress-label {
  color: var(--blue);
  font-size: 10px;
  font-weight: 800;
}

.progress-track {
  height: 5px;
  margin-top: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-soft);
}

.progress-track span {
  display: block;
  width: 72%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #3c7ff7, #795ee7);
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
  margin-top: 18px;
}

.format-item {
  display: grid;
  min-width: 0;
  padding: 12px 8px;
  border: 1px solid var(--line);
  border-radius: 11px;
  text-align: center;
  place-items: center;
}

.format-glyph {
  display: grid;
  width: 45px;
  height: 45px;
  border: 1px solid #cfe0ff;
  border-radius: 13px;
  background: linear-gradient(145deg, #f8fbff, #dfeaff);
  box-shadow: 0 8px 18px rgba(47, 114, 245, 0.12);
  color: #3474ee;
  font-size: 17px;
  font-weight: 850;
  place-items: center;
}

.format-item span {
  margin-top: 6px;
  font-size: 9px;
  font-weight: 750;
}

.format-item i {
  margin-top: 3px;
  color: #36a36d;
  font-size: 8px;
  font-style: normal;
}

.workspace-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 18px;
  color: var(--text-soft);
  font-size: 8px;
}

.workspace-footer button {
  padding: 8px 13px;
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font-size: 9px;
  font-weight: 750;
}

.floating-chip {
  position: absolute;
  z-index: 4;
  display: flex;
  gap: 10px;
  align-items: center;
  min-width: 134px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 15px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
  animation: float 4s ease-in-out infinite;
}

.floating-chip strong {
  display: block;
  font-size: 11px;
}

.chip-icon {
  display: grid;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, #e9f1ff, #dbe8ff);
  color: #3474ee;
  font-size: 12px;
  font-weight: 850;
  place-items: center;
}

.chip-icon svg {
  width: 21px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.chip-speed {
  top: 2px;
  right: -20px;
}

.chip-safe {
  bottom: 0;
  left: -26px;
  animation-delay: -1.6s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.trust-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 27px 0;
}

.trust-grid div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  border-right: 1px solid var(--line);
}

.trust-grid div:last-child {
  border-right: 0;
}

.trust-grid strong {
  font-size: 18px;
}

.trust-grid span {
  color: var(--text-soft);
  font-size: 12px;
}

.section {
  padding: 108px 0;
}

.section-heading {
  max-width: 570px;
}

.section-heading.centered {
  margin: 0 auto 54px;
  text-align: center;
}

.section-label {
  display: inline-block;
  margin-bottom: 13px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.section-heading h2,
.privacy-copy h2,
.support-card h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.045em;
}

.section-heading p,
.privacy-copy p {
  margin: 17px 0 0;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.85;
}

.features-section {
  background: var(--surface);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  position: relative;
  overflow: hidden;
  min-height: 310px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--blue) 26%, var(--line));
  box-shadow: var(--shadow-sm);
  transform: translateY(-5px);
}

.feature-card-large {
  display: grid;
  grid-column: span 2;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  background:
    radial-gradient(circle at 80% 30%, rgba(67, 121, 241, 0.16), transparent 36%),
    var(--bg);
}

.feature-art {
  display: grid;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(110, 159, 255, 0.42);
  border-radius: 52px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(211, 228, 255, 0.92)),
    var(--blue-soft);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 28px 46px rgba(55, 105, 205, 0.2);
  color: var(--blue);
  font-size: 72px;
  font-weight: 850;
  place-items: center;
  transform: rotate(4deg);
}

.feature-card-large > .feature-art {
  width: 210px;
  justify-self: center;
}

.feature-card-wide {
  display: grid;
  grid-column: span 2;
  grid-template-columns: 1.3fr 0.7fr;
  align-items: center;
  background:
    radial-gradient(circle at 82% 50%, rgba(103, 82, 230, 0.18), transparent 32%),
    var(--bg);
}

.feature-card-wide > .feature-art {
  width: 190px;
  justify-self: center;
  color: var(--violet);
  transform: rotate(-4deg);
}

.feature-number {
  color: var(--blue);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.1em;
}

.feature-card h3 {
  margin: 18px 0 10px;
  font-size: 22px;
  letter-spacing: -0.025em;
}

.feature-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.feature-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 20px 0 0;
  padding: 0;
  color: var(--text-soft);
  font-size: 12px;
  list-style: none;
}

.feature-card li::before {
  margin-right: 6px;
  color: #36a36d;
  content: "✓";
  font-weight: 800;
}

.feature-icon {
  display: grid;
  width: 92px;
  height: 92px;
  margin-top: 20px;
  border-radius: 25px;
  place-items: center;
}

.feature-icon span {
  color: var(--blue);
  font-size: 34px;
  font-weight: 850;
}

.soft-violet span {
  color: var(--violet);
}

.soft-cyan span {
  color: var(--cyan);
}

.soft-blue {
  background: #e9f1ff;
}

.soft-violet {
  background: #f0edff;
}

.soft-cyan {
  background: #e7f8fb;
}

.mini-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.mini-tags span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 11px;
  font-weight: 650;
}

.workflow-section {
  padding-top: 100px;
}

.workflow-grid {
  display: grid;
  grid-template-columns: 1fr 100px 1fr 100px 1fr;
  align-items: start;
}

.workflow-grid article {
  text-align: center;
}

.workflow-grid article > span {
  display: grid;
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border: 8px solid var(--blue-soft);
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 850;
  place-items: center;
}

.workflow-grid h3 {
  margin: 18px 0 8px;
  font-size: 18px;
}

.workflow-grid p {
  margin: 0 auto;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.7;
}

.workflow-line {
  height: 1px;
  margin-top: 28px;
  background: linear-gradient(90deg, var(--line), var(--blue), var(--line));
}

.audience-section {
  background: var(--surface);
}

.audience-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 90px;
  align-items: center;
}

.text-link {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  margin-top: 28px;
  color: var(--blue);
  font-weight: 750;
}

.text-link svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  transition: transform 0.2s ease;
}

.text-link:hover svg {
  transform: translateX(4px);
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.audience-list article {
  display: flex;
  gap: 15px;
  align-items: center;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--bg);
  transition: transform 0.2s ease;
}

.audience-list article:hover {
  transform: translateY(-3px);
}

.audience-icon {
  display: grid;
  flex: 0 0 auto;
  width: 45px;
  height: 45px;
  border-radius: 13px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 14px;
  font-weight: 850;
  place-items: center;
}

.audience-list h3 {
  margin: 0 0 5px;
  font-size: 15px;
}

.audience-list p {
  margin: 0;
  color: var(--text-soft);
  font-size: 11px;
  line-height: 1.55;
}

.privacy-section {
  padding-bottom: 72px;
}

.privacy-card {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 60px;
  align-items: center;
  min-height: 390px;
  padding: 58px 76px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 15% 20%, rgba(125, 164, 255, 0.45), transparent 24%),
    linear-gradient(135deg, #1f5bd0, #375ee2 55%, #644bd6);
  color: #fff;
  box-shadow: 0 30px 70px rgba(39, 82, 186, 0.25);
}

.privacy-visual {
  display: grid;
  place-items: center;
}

.privacy-ring {
  display: grid;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  box-shadow:
    0 0 0 28px rgba(255, 255, 255, 0.06),
    0 0 0 56px rgba(255, 255, 255, 0.03);
  place-items: center;
}

.privacy-ring svg {
  width: 82px;
  fill: none;
  stroke: #fff;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.3;
}

.section-label.light {
  color: #cdddff;
}

.privacy-copy p {
  color: rgba(255, 255, 255, 0.78);
}

.privacy-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 25px;
}

.privacy-points span {
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: 700;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 400px));
  gap: 22px;
  justify-content: center;
}

.download-card {
  position: relative;
  padding: 35px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

.download-card:hover,
.download-card.recommended {
  border-color: color-mix(in srgb, var(--blue) 45%, var(--line));
  box-shadow: 0 22px 55px rgba(47, 114, 245, 0.16);
  transform: translateY(-5px);
}

.recommended-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 10px;
  font-weight: 800;
}

.platform-icon {
  display: grid;
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 21px;
  background: var(--blue-soft);
  color: var(--blue);
  place-items: center;
}

.apple-icon svg {
  width: 38px;
  fill: currentColor;
}

.windows-icon {
  grid-template-columns: repeat(2, 16px);
  grid-template-rows: repeat(2, 16px);
  gap: 3px;
}

.windows-icon span {
  display: block;
  width: 16px;
  height: 16px;
  background: currentColor;
}

.download-card h3 {
  margin: 0 0 8px;
  font-size: 24px;
}

.download-card > p {
  min-height: 46px;
  margin: 0 auto;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.7;
}

.download-meta {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 22px 0;
  color: var(--text-soft);
  font-size: 11px;
}

.download-meta span + span::before {
  margin-right: 12px;
  content: "·";
}

.platform-button {
  width: 100%;
}

.download-note {
  max-width: 700px;
  margin: 24px auto 0;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
}

.faq-section {
  background: var(--surface);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 88px;
  align-items: start;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 22px 0;
  font-size: 15px;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary span {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface-soft);
}

.faq-list summary span::before,
.faq-list summary span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--text-soft);
  content: "";
  transform: translate(-50%, -50%);
}

.faq-list summary span::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.2s ease;
}

.faq-list details[open] summary span::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-list details p {
  margin: -8px 0 22px;
  padding-right: 44px;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.75;
}

.support-section {
  padding: 60px 0 96px;
  background: var(--surface);
}

.support-card {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: center;
  padding: 48px 58px;
  border-radius: 26px;
  background: linear-gradient(120deg, #2e70ef, #6851df);
  color: #fff;
  box-shadow: 0 26px 60px rgba(58, 87, 196, 0.22);
}

.support-card h2 {
  font-size: 31px;
}

.support-card p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.support-heart {
  display: inline-grid;
  width: 30px;
  height: 30px;
  margin-bottom: 14px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 13px;
  place-items: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 50px;
  padding: 58px 0 44px;
}

.footer-brand p {
  max-width: 300px;
  margin: 15px 0 0;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.footer-links div {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links strong {
  margin-bottom: 3px;
  font-size: 13px;
}

.footer-links a,
.footer-links button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text-soft);
  font-size: 12px;
  text-align: left;
  cursor: pointer;
}

.footer-links a:hover,
.footer-links button:hover {
  color: var(--blue);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding: 21px 0 28px;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 11px;
}

.modal {
  width: min(calc(100% - 32px), 560px);
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.modal::backdrop {
  background: rgba(10, 18, 38, 0.55);
  backdrop-filter: blur(5px);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 18px;
  display: grid;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 9px;
  background: var(--surface-soft);
  color: var(--text-soft);
  font-size: 22px;
  cursor: pointer;
  place-items: center;
}

.modal-icon {
  display: grid;
  width: 54px;
  height: 54px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: #fff0f3;
  color: #e65470;
  place-items: center;
}

.windows-modal-icon {
  background: var(--blue-soft);
  color: var(--blue);
}

.modal h2 {
  margin: 0;
  font-size: 25px;
}

.modal > p {
  margin: 12px auto 22px;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.7;
}

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

.donate-code {
  overflow: hidden;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.donate-code-head {
  display: flex;
  justify-content: center;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.payment-mark {
  display: grid;
  width: 27px;
  height: 27px;
  border-radius: 8px;
  color: #fff;
  font-size: 13px;
  font-weight: 850;
  place-items: center;
}

.wechat-code .payment-mark {
  background: #07c160;
}

.alipay-code .payment-mark {
  background: #1677ff;
}

.donate-code-head strong {
  font-size: 13px;
}

.donate-code img {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 11px;
  background: #fff;
  object-fit: cover;
}

.wechat-code img {
  object-position: center 36%;
}

.alipay-code img {
  object-position: center 44%;
}

.donate-code small {
  display: block;
  margin-top: 10px;
  color: var(--text-soft);
}

.modal-note {
  display: block;
  margin-top: 18px;
  color: var(--text-soft);
}

.compact-modal {
  max-width: 420px;
}

.compact-modal .button {
  width: 100%;
}

.toast {
  position: fixed;
  z-index: 100;
  right: 24px;
  bottom: 24px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  color: var(--text);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: 0.25s ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .desktop-nav {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-description {
    margin-right: auto;
    margin-left: auto;
  }

  .hero-actions,
  .hero-meta {
    justify-content: center;
  }

  .hero-visual {
    width: min(100%, 690px);
    margin: 10px auto 0;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-card-large,
  .feature-card-wide {
    grid-column: span 2;
  }

  .feature-card:not(.feature-card-large, .feature-card-wide) {
    min-height: 300px;
  }

  .audience-grid,
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .audience-grid .section-heading,
  .faq-layout .section-heading {
    max-width: 680px;
  }

  .privacy-card {
    grid-template-columns: 0.6fr 1.4fr;
    padding: 52px;
  }

  .footer-links {
    gap: 45px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-wrap {
    height: 64px;
  }

  .nav-actions .button {
    display: none;
  }

  .brand {
    font-size: 18px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .hero {
    min-height: 0;
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 43px;
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-meta {
    gap: 10px 16px;
  }

  .hero-visual {
    padding: 35px 0 26px;
  }

  .app-card {
    transform: none;
  }

  .app-card-body {
    grid-template-columns: 86px 1fr;
    min-height: 310px;
  }

  .sidebar {
    padding: 12px 7px;
  }

  .sidebar-item {
    gap: 5px;
    padding: 8px 5px;
    font-size: 8px;
  }

  .workspace {
    padding: 14px;
  }

  .workspace-head small,
  .workspace-head > span,
  .workspace-footer > span {
    display: none;
  }

  .document-row {
    margin-top: 14px;
  }

  .format-grid {
    gap: 5px;
  }

  .format-item {
    padding: 8px 3px;
  }

  .format-glyph {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    font-size: 13px;
  }

  .floating-chip {
    display: none;
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px 0;
  }

  .trust-grid div:nth-child(2) {
    border-right: 0;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading.centered {
    margin-bottom: 38px;
  }

  .section-heading h2,
  .privacy-copy h2 {
    font-size: 34px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .feature-card-large,
  .feature-card-wide {
    grid-column: span 1;
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 26px;
  }

  .feature-card-large > .feature-art,
  .feature-card-wide > .feature-art {
    width: 150px;
    height: 150px;
    margin-top: 20px;
    border-radius: 42px;
    font-size: 56px;
  }

  .workflow-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .workflow-line {
    display: none;
  }

  .audience-list {
    grid-template-columns: 1fr;
  }

  .privacy-section {
    padding-bottom: 42px;
  }

  .privacy-card {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 45px 28px;
    text-align: center;
  }

  .privacy-ring {
    width: 130px;
    height: 130px;
  }

  .privacy-ring svg {
    width: 58px;
  }

  .privacy-points {
    justify-content: center;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }

  .support-card {
    flex-direction: column;
    align-items: stretch;
    padding: 38px 28px;
    text-align: center;
  }

  .support-card h2 {
    font-size: 28px;
  }

  .footer-main {
    flex-direction: column;
  }

  .footer-links {
    justify-content: space-between;
    gap: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }

  .modal {
    padding: 32px 20px 24px;
  }

  .donate-methods {
    grid-template-columns: 1fr;
  }

  .donate-code img {
    aspect-ratio: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}