:root {
  --bg: #05070d;
  --bg-soft: #080b14;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #e9effc;
  --text-2: #9fadc6;
  --text-3: #6d7b93;
  --brand: #4a90e2;
  --brand-deep: #2f6fd0;
  --cyan: #22d3ee;
  --violet: #7c5cff;
  --grad: linear-gradient(120deg, #4a90e2 0%, #22d3ee 100%);
  --grad-soft: linear-gradient(120deg, rgba(74, 144, 226, 0.18), rgba(34, 211, 238, 0.12));
  --glow: 0 0 0 1px rgba(74, 144, 226, 0.35), 0 18px 60px -18px rgba(74, 144, 226, 0.65);
  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1200px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
}

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(ellipse 90% 62% at 50% -5%, #000 35%, transparent 100%);
  mask-image: radial-gradient(ellipse 90% 62% at 50% -5%, #000 35%, transparent 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background: radial-gradient(900px 500px at 15% -6%, rgba(74, 144, 226, 0.22), transparent 60%),
    radial-gradient(760px 460px at 92% 4%, rgba(34, 211, 238, 0.14), transparent 62%),
    radial-gradient(900px 620px at 50% 108%, rgba(124, 92, 255, 0.12), transparent 60%);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

::selection {
  background: rgba(34, 211, 238, 0.32);
  color: #fff;
}

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

.section {
  padding: 96px 0;
  position: relative;
}

.section.tight {
  padding: 64px 0;
}

.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: rgba(34, 211, 238, 0.08);
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-sub {
  margin-top: 16px;
  color: var(--text-2);
  font-size: 17px;
}

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.grid {
  display: grid;
  gap: 22px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.35s, background 0.35s, box-shadow 0.35s;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 42%);
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  background: var(--surface-2);
  box-shadow: 0 24px 60px -30px rgba(74, 144, 226, 0.7);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  font-size: 19px;
  font-weight: 650;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card p {
  color: var(--text-2);
  font-size: 15px;
}

.icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 18px;
  background: var(--grad-soft);
  border: 1px solid rgba(74, 144, 226, 0.3);
  box-shadow: inset 0 0 24px rgba(74, 144, 226, 0.18);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  border: 1px solid transparent;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s, background 0.25s, border-color 0.25s, opacity 0.25s;
  white-space: nowrap;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--grad);
  color: #041018;
  box-shadow: 0 14px 40px -16px rgba(74, 144, 226, 0.9);
  font-weight: 700;
}

.btn-primary:hover {
  box-shadow: 0 20px 52px -16px rgba(34, 211, 238, 0.95);
}

.btn-secondary {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: rgba(74, 144, 226, 0.6);
  background: rgba(74, 144, 226, 0.14);
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text-2);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-lg {
  padding: 16px 34px;
  font-size: 16px;
  border-radius: 14px;
}

.btn-block {
  width: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(6, 9, 16, 0.78);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
}

.nav-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  box-shadow: 0 6px 20px -8px rgba(74, 144, 226, 0.9);
}

.brand small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 9px 15px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
  transition: color 0.25s, background 0.25s;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-link.active {
  color: var(--text);
  background: var(--surface-2);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions .btn {
  padding: 11px 20px;
  font-size: 14.5px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface);
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  position: relative;
  transition: background 0.25s;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-open .nav-toggle span {
  background: transparent;
}

.nav-open .nav-toggle span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-open .nav-toggle span::after {
  transform: translateY(-6px) rotate(-45deg);
}

.hero {
  padding: 168px 0 96px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 9px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 26px;
}

.hero-badge b {
  color: var(--text);
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.7);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.6);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(34, 211, 238, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(34, 211, 238, 0);
  }
}

.hero-title {
  font-size: clamp(34px, 5.2vw, 60px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.hero-lead {
  font-size: 17.5px;
  color: var(--text-2);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 13.5px;
  color: var(--text-3);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-meta svg {
  width: 15px;
  height: 15px;
  color: var(--cyan);
}

.hero-scenes {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero-scenes span {
  color: var(--text);
}

.hero-scenes span:nth-child(3) {
  color: var(--cyan);
}

.hero-scenes i {
  display: block;
  width: 1px;
  height: 14px;
  background: var(--border-strong);
}

.hero-features {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px 28px;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.hero-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-2);
}

.feat-check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(74, 222, 128, 0.16);
  border: 1px solid rgba(74, 222, 128, 0.4);
  display: grid;
  place-items: center;
  margin-top: 1px;
  position: relative;
}

.feat-check::after {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid #4ade80;
  border-bottom: 2px solid #4ade80;
  transform: rotate(-45deg) translate(1px, -1px);
  border-radius: 1px;
}

.app-mockup {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, rgba(20, 27, 43, 0.95), rgba(9, 12, 20, 0.96));
  box-shadow: 0 50px 120px -40px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(74, 144, 226, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
  transform: perspective(1400px) rotateY(-7deg) rotateX(2deg);
  transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.app-mockup:hover {
  transform: perspective(1400px) rotateY(-2deg) rotateX(0deg);
}

.mock-bar {
  height: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.mock-dots {
  display: flex;
  gap: 7px;
}

.mock-dots i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: block;
}

.mock-dots i:nth-child(1) {
  background: #ff5f57;
}

.mock-dots i:nth-child(2) {
  background: #febc2e;
}

.mock-dots i:nth-child(3) {
  background: #28c840;
}

.mock-title {
  margin-left: 12px;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--mono);
}

.mock-bar-actions {
  margin-left: auto;
  display: flex;
  gap: 7px;
}

.mock-bar-actions span {
  width: 13px;
  height: 3px;
  border-radius: 2px;
  background: var(--text-3);
  opacity: 0.55;
  display: block;
}

.mock-body {
  display: grid;
  grid-template-columns: 168px 1fr;
  min-height: 400px;
}

.mock-side {
  border-right: 1px solid var(--border);
  padding: 16px 12px;
  background: rgba(255, 255, 255, 0.015);
}

.mock-side-label {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--text-3);
  padding: 2px 11px 9px;
}

.mock-side-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-radius: 9px;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 4px;
}

.mock-side-item.active {
  background: rgba(74, 144, 226, 0.16);
  color: var(--text);
  border: 1px solid rgba(74, 144, 226, 0.3);
}

.mock-side-item i {
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--text-3);
  display: block;
}

.mock-side-item.active i {
  background: var(--cyan);
}

.mock-main {
  padding: 18px;
}

.mock-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.mock-toolbar h4 {
  font-size: 14px;
  font-weight: 600;
}

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

.mock-chip {
  font-size: 11.5px;
  color: var(--text-3);
  font-family: var(--mono);
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.mock-btn {
  font-size: 12px;
  font-weight: 700;
  color: #041018;
  padding: 7px 13px;
  border-radius: 9px;
  background: var(--grad);
  box-shadow: 0 8px 22px -8px rgba(74, 144, 226, 0.9);
}

.mock-head {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.8fr 0.7fr;
  gap: 10px;
  padding: 0 13px 9px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-3);
}

.mock-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.8fr 0.7fr;
  gap: 10px;
  align-items: center;
  padding: 11px 13px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  margin-bottom: 9px;
  font-size: 12.5px;
  color: var(--text-2);
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
}

.mock-row:hover {
  border-color: rgba(74, 144, 226, 0.42);
  background: rgba(74, 144, 226, 0.07);
  transform: translateX(3px);
}

.mock-row .name {
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.nm {
  display: flex;
  flex-direction: column;
  line-height: 1.35;
  min-width: 0;
}

.nm b {
  font-weight: 600;
  font-size: 12.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nm small {
  color: var(--text-3);
  font-size: 10.5px;
  font-family: var(--mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.av {
  width: 27px;
  height: 27px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  font-style: normal;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.av-1 { background: linear-gradient(135deg, #4a90e2, #22d3ee); }
.av-2 { background: linear-gradient(135deg, #7c5cff, #4a90e2); }
.av-3 { background: linear-gradient(135deg, #0ea5e9, #34d399); }
.av-4 { background: linear-gradient(135deg, #f59e0b, #f97316); }

.mock-tag {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  font-family: var(--mono);
}

.mock-tag.on {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.12);
  border: 1px solid rgba(74, 222, 128, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 68px;
}

.mock-tag.on::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 9px rgba(74, 222, 128, 0.9);
}

.mock-tag.proxy {
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
}

.mock-statusbar {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 15px;
  padding: 10px 13px;
  border-radius: 10px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  font-size: 11.5px;
  color: var(--text-3);
}

.mock-statusbar i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 10px rgba(74, 222, 128, 0.9);
  flex-shrink: 0;
}

.mock-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.28), transparent 65%);
  filter: blur(20px);
  right: -80px;
  bottom: -110px;
  pointer-events: none;
}

.app-frame {
  position: relative;
}

.app-frame::after {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 144, 226, 0.3), transparent 62%);
  filter: blur(28px);
  top: -90px;
  left: -90px;
  z-index: -1;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.feature-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--text-2);
}

.feature-list svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
  flex-shrink: 0;
  margin-top: 3px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background: var(--bg-soft);
  padding: 30px 24px;
  text-align: center;
}

.stat-num {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 14px;
  color: var(--text-2);
  margin-top: 6px;
}

.scene {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.scene .icon-badge {
  margin-bottom: 0;
}

.scene h3 {
  font-size: 18px;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
}

.step {
  display: flex;
  gap: 20px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.3s, background 0.3s;
}

.step:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.step-no {
  counter-increment: step;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 17px;
  color: #041018;
  background: var(--grad);
  font-family: var(--mono);
}

.step-no::before {
  content: counter(step, decimal-leading-zero);
}

.step h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.step p {
  color: var(--text-2);
  font-size: 14.5px;
}

pre,
.code {
  font-family: var(--mono);
  font-size: 13.5px;
  background: rgba(3, 6, 12, 0.85);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  color: #cfe3ff;
  line-height: 1.7;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: rgba(74, 144, 226, 0.14);
  border: 1px solid rgba(74, 144, 226, 0.22);
  padding: 2px 7px;
  border-radius: 6px;
  color: #bfe0ff;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.download-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
}

.dl-card {
  flex: 0 1 320px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.35s, box-shadow 0.35s;
}

.dl-card:hover {
  transform: translateY(-6px);
  border-color: rgba(74, 144, 226, 0.5);
  box-shadow: 0 30px 70px -34px rgba(74, 144, 226, 0.85);
}

.dl-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.dl-logo {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;

  flex-shrink: 0;
}

.dl-logo.quark {
  background: linear-gradient(135deg, #4f8cff, #6ea8ff);
  color: #fff;
}

.dl-logo.xunlei {
  background: linear-gradient(135deg, #2f7cff, #0aa7ff);
  color: #fff;
}

.dl-logo.uc {
  background: linear-gradient(135deg, #ff7a3d, #ff9f45);
  color: #fff;
}

.dl-head h3 {
  font-size: 18px;
  margin-bottom: 2px;
}

.dl-head p {
  font-size: 13px;
  color: var(--text-3);
}

.dl-note {
  margin-top: auto;
  font-size: 12.5px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 7px;
}

.version-panel {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
  padding: 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: linear-gradient(150deg, rgba(74, 144, 226, 0.14), rgba(9, 12, 20, 0.6));
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.version-panel h3 {
  font-size: 24px;
  margin-bottom: 14px;
}

.version-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.version-meta div {
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}

.version-meta dt {
  font-size: 12px;
  color: var(--text-3);
  margin-bottom: 5px;
}

.version-meta dd {
  font-size: 15px;
  font-weight: 600;
  font-family: var(--mono);
}

.changelog {
  border-left: 2px solid rgba(74, 144, 226, 0.5);
  padding-left: 20px;
  display: grid;
  gap: 16px;
}

.changelog-item strong {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 13.5px;
}

.changelog-item p {
  color: var(--text-2);
  font-size: 14px;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 13px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.3s, background 0.3s;
}

.faq-item.open {
  border-color: rgba(74, 144, 226, 0.45);
  background: var(--surface-2);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  padding: 21px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.faq-q i {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  font-style: normal;
  font-size: 16px;
  color: var(--cyan);
  transition: transform 0.35s, background 0.35s;
}

.faq-item.open .faq-q i {
  transform: rotate(45deg);
  background: rgba(34, 211, 238, 0.12);
}

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-item.open .faq-a {
  grid-template-rows: 1fr;
}

.faq-a > div {
  overflow: hidden;
}

.faq-a p {
  padding: 0 24px 24px;
  color: var(--text-2);
  font-size: 15px;
}

.faq-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 18px;
}

.faq-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: color 0.25s, border-color 0.25s, background 0.25s, transform 0.25s;
}

.faq-nav a:hover {
  color: var(--text);
  border-color: rgba(74, 144, 226, 0.55);
  background: rgba(74, 144, 226, 0.12);
  transform: translateY(-2px);
}

.faq-cat {
  max-width: 860px;
  margin: 0 auto 52px;
}

.faq-cat:last-child {
  margin-bottom: 0;
}

.faq-cat-title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.faq-cat-no {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
  background: rgba(34, 211, 238, 0.08);
  padding: 4px 11px;
  border-radius: 9px;
}

.cta-band {
  position: relative;
  border-radius: 28px;
  padding: 64px 40px;
  text-align: center;
  overflow: hidden;
  border: 1px solid rgba(74, 144, 226, 0.35);
  background: linear-gradient(140deg, rgba(74, 144, 226, 0.2), rgba(34, 211, 238, 0.12) 45%, rgba(124, 92, 255, 0.16));
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 70% 100% at 50% 0%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 100% at 50% 0%, #000, transparent 75%);
  pointer-events: none;
}

.cta-band > * {
  position: relative;
}

.cta-band h2 {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-band p {
  color: var(--text-2);
  max-width: 620px;
  margin: 0 auto 30px;
  font-size: 16.5px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.page-hero {
  padding: 152px 0 60px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.page-hero p {
  color: var(--text-2);
  font-size: 17px;
  max-width: 660px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-3);
  margin-bottom: 22px;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.prose {
  max-width: 820px;
  margin: 0 auto;
}

.prose h2 {
  font-size: clamp(22px, 3vw, 30px);
  margin: 48px 0 16px;
  letter-spacing: -0.02em;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 19px;
  margin: 32px 0 12px;
}

.prose p {
  color: var(--text-2);
  margin-bottom: 16px;
}

.prose ul.plain {
  list-style: disc;
  padding-left: 22px;
  color: var(--text-2);
  margin-bottom: 18px;
  display: grid;
  gap: 8px;
}

.prose a.link {
  color: var(--cyan);
  border-bottom: 1px dashed rgba(34, 211, 238, 0.5);
}

.prose a.link:hover {
  color: #fff;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}

.qr-card img {
  width: 148px;
  height: 148px;
  border-radius: 14px;
  background: #fff;
  padding: 6px;
  flex-shrink: 0;
}

.qr-card h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.qr-card p {
  color: var(--text-2);
  font-size: 14.5px;
}

.notice {
  display: flex;
  gap: 14px;
  padding: 20px 22px;
  border-radius: 14px;
  border: 1px solid rgba(251, 191, 36, 0.3);
  background: rgba(251, 191, 36, 0.08);
  color: #fde68a;
  font-size: 14.5px;
  align-items: flex-start;
}

.notice svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 560px;
}

th,
td {
  text-align: left;
  padding: 15px 18px;
  border-bottom: 1px solid var(--border);
}

th {
  background: rgba(255, 255, 255, 0.03);
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

td {
  color: var(--text-2);
}

tr:last-child td {
  border-bottom: none;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 30px;
  margin-top: 40px;
  background: linear-gradient(180deg, transparent, rgba(74, 144, 226, 0.05));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-2);
  font-size: 14px;
  margin: 16px 0 20px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-col a {
  display: block;
  color: var(--text-2);
  font-size: 14px;
  padding: 6px 0;
  transition: color 0.25s, padding-left 0.25s;
}

.footer-col a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
}

.footer-bottom .disclaimer {
  max-width: 620px;
  font-size: 12.5px;
  line-height: 1.7;
}

.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  border: 1px solid var(--border-strong);
  background: rgba(10, 14, 22, 0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display: grid;
  place-items: center;
  color: var(--text);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s, border-color 0.3s;
  z-index: 90;
}

.to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  border-color: rgba(74, 144, 226, 0.7);
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

html:not(.js-ready) .reveal {
  opacity: 1;
  transform: none;
}

.mt-32 {
  margin-top: 32px;
}

.mt-48 {
  margin-top: 48px;
}

.mb-24 {
  margin-bottom: 24px;
}

.center {
  text-align: center;
}

.muted {
  color: var(--text-2);
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .app-mockup {
    transform: none;
  }

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

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .download-grid {
    flex-direction: column;
    align-items: center;
  }

  .dl-card {
    flex: 0 0 auto;
    width: 100%;
    max-width: 420px;
  }

  .dl-note {
    margin-top: 0;
  }

  .version-panel {
    grid-template-columns: 1fr;
  }

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

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 24px;
    background: rgba(6, 9, 16, 0.97);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-140%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .nav-open .nav-links {
    transform: translateY(0);
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 16px;
  }

  .nav-toggle {
    display: grid;
  }
}

@media (max-width: 760px) {
  .section {
    padding: 68px 0;
  }

  .hero {
    padding: 132px 0 68px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero-features {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px;
    margin-top: 44px;
  }

  .stats {
    gap: 1px;
  }

  .mock-body {
    grid-template-columns: 1fr;
  }

  .mock-side {
    display: none;
  }

  .mock-row {
    grid-template-columns: 1.4fr 0.9fr;
  }

  .mock-row > *:nth-child(3),
  .mock-row > *:nth-child(4),
  .mock-head > *:nth-child(3),
  .mock-head > *:nth-child(4) {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .footer-col h4 {
    margin-bottom: 10px;
  }

  .footer-col a {
    padding: 4px 0;
    font-size: 13.5px;
  }

  .qr-card {
    flex-direction: column;
    text-align: center;
  }

  .cta-band {
    padding: 48px 24px;
  }

  .version-meta {
    grid-template-columns: 1fr;
  }

  .btn-lg {
    width: 100%;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }
}

/* ===== Platform Wall ===== */
.platform-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.platform-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary, #a0aec0);
  background: var(--glass, rgba(255,255,255,0.04));
  border: 1px solid var(--glass-border, rgba(255,255,255,0.08));
  transition: all 0.25s ease;
}

.platform-tag:hover {
  color: #4A90E2;
  border-color: #4A90E2;
  background: rgba(74, 144, 226, 0.08);
  transform: translateY(-2px);
}

/* ===== Fingerprint Cloud ===== */
.fp-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: 820px;
  margin: 0 auto;
}

.fp-tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--mono, monospace);
  color: var(--text-secondary, #a0aec0);
  background: rgba(74, 144, 226, 0.06);
  border: 1px solid rgba(74, 144, 226, 0.15);
  transition: all 0.25s ease;
}

.fp-tag:hover {
  color: #fff;
  background: rgba(74, 144, 226, 0.2);
  border-color: #4A90E2;
  box-shadow: 0 0 12px rgba(74, 144, 226, 0.3);
}

/* ===== Compare Cards ===== */
.compare-card {
  padding: 32px;
}

.compare-card.bad {
  border-color: rgba(239, 68, 68, 0.25);
  background: rgba(239, 68, 68, 0.03);
}

.compare-card.good {
  border-color: rgba(74, 222, 128, 0.25);
  background: rgba(74, 222, 128, 0.03);
}

.compare-label {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.compare-card.bad .compare-label { color: #ef4444; }
.compare-card.good .compare-label { color: #4ade80; }

.compare-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.compare-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary, #a0aec0);
}

.compare-card.bad .compare-list li::before {
  content: "✕";
  color: #ef4444;
  font-weight: bold;
  flex-shrink: 0;
}

.compare-card.good .compare-list li::before {
  content: "✓";
  color: #4ade80;
  font-weight: bold;
  flex-shrink: 0;
}

/* ===== Free & Safe Section ===== */
.free-safe { text-align: center; }
.free-safe-head { margin-bottom: 48px; }

.free-safe-card {
  text-align: left;
  padding: 28px;
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.free-safe-card:hover {
  border-color: rgba(74, 144, 226, 0.3);
  transform: translateY(-3px);
}

.free-safe-card .icon-badge { margin-bottom: 16px; }
.free-safe-card h3 { font-size: 18px; margin-bottom: 10px; }
.free-safe-card p { font-size: 14px; line-height: 1.7; color: var(--text-2, #a0aec0); }

/* ===== About Page Layout ===== */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.about-side {
  position: sticky;
  top: 96px;
}

.about-side h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 12px 0 20px;
  letter-spacing: -0.02em;
}

.about-quote {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  padding-left: 16px;
  border-left: 2px solid var(--brand);
}

.about-body p {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-2);
  margin-bottom: 18px;
}

.about-body p:last-child { margin-bottom: 0; }

/* ===== Notice Card ===== */
.notice-card {
  max-width: 860px;
  margin: 0 auto;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}

.notice-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.notice-head .icon-badge { margin-bottom: 0; }

.notice-head h2 {
  font-size: 22px;
  margin: 0 0 4px;
}

.notice-head p {
  margin: 0;
  font-size: 14px;
  color: var(--text-2);
}

.notice-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
  counter-reset: notice;
}

.notice-list li {
  position: relative;
  padding-left: 34px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
  counter-increment: notice;
}

.notice-list li::before {
  content: counter(notice, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--brand);
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-side {
    position: static;
  }
  .notice-card {
    padding: 24px;
  }
}

/* ===== Guide Page Layout ===== */
.split-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.split-side {
  position: sticky;
  top: 96px;
}

.split-side h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 12px 0 20px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.split-quote {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  padding-left: 16px;
  border-left: 2px solid var(--brand);
}

.split-body {
  display: grid;
  gap: 18px;
}

.split-list {
  padding: 28px 28px 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.split-list li {
  font-size: 15px;
  line-height: 1.85;
}

.code-card {
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: border-color 0.3s, background 0.3s;
}

.code-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.code-card h3 {
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.code-card p {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 14px;
  line-height: 1.7;
}

.code-card pre {
  margin: 0;
  font-size: 13px;
}

.guide-steps {
  max-width: 880px;
  margin: 0 auto;
  gap: 20px;
}

@media (max-width: 860px) {
  .split-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .split-side {
    position: static;
  }
  .split-list {
    padding: 22px 22px 22px 18px;
  }
  .code-card {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}