:root {
  --bg: #0b0e14;
  --bg-alt: #0f1420;
  --surface: rgba(255, 255, 255, 0.028);
  --surface-solid: #131a28;
  --border: rgba(148, 163, 184, 0.16);
  --border-strong: rgba(148, 163, 184, 0.32);
  --text: #e6ebf5;
  --muted: #8b95ab;
  --accent: #6ee7b7;
  --accent2: #818cf8;
  --pink: #f472b6;
  --gradient: linear-gradient(135deg, #6ee7b7 0%, #818cf8 55%, #f472b6 100%);
  --radius: 12px;
  --font: "Noto Sans SC", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(129, 140, 248, 0.32); color: #fff; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 14, 20, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.logo {
  font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.55rem;
  letter-spacing: 0.01em;
}
.logo-icon { width: 24px; height: 24px; border-radius: 6px; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 1.75rem; flex-wrap: wrap; }
.nav a {
  color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px;
  background: var(--accent); transition: right 0.25s ease;
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { right: 0; }
.nav a.active { color: var(--accent); }
.nav a.active::after { right: 0; }

/* ---------- Hero ---------- */
.hero {
  padding: 4.5rem 0 5rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 45% at 18% -10%, rgba(129, 140, 248, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 40% at 100% 30%, rgba(110, 231, 183, 0.05), transparent 70%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 30%, transparent 75%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
}
.eyebrow {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 1.1rem;
}
.hero h1 {
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  line-height: 1.22; margin: 0 0 1.1rem; font-weight: 700;
  letter-spacing: -0.01em;
}
.gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lead { color: var(--muted); font-size: 1.04rem; max-width: 32rem; margin-bottom: 1.75rem; }
.hero-cta { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 2.5rem; }

/* ---------- 按钮（线条风） ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.62rem 1.4rem;
  border-radius: 8px; font-weight: 600; font-size: 0.94rem; text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gradient); color: #0b0e14;
  border: none;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset, 0 4px 20px rgba(110, 231, 183, 0.16);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset, 0 8px 28px rgba(110, 231, 183, 0.24); }
.btn-ghost {
  border: 1px solid var(--border-strong); color: var(--text);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: rgba(110, 231, 183, 0.05); }
/* 置灰禁用按钮（内测中即将上线等场景）：不跳转、hover 无态、指针 not-allowed */
.btn-disabled,
.btn-disabled:hover {
  opacity: 0.5;
  cursor: not-allowed;
  color: var(--muted);
  background: transparent;
  border: 1px dashed var(--border-strong);
  transform: none;
  box-shadow: none;
}

.hero-stats {
  list-style: none; padding: 0; margin: 0;
  display: flex; gap: 0; flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.hero-stats li {
  display: flex; flex-direction: column;
  padding-right: 2rem; margin-right: 2rem;
  border-right: 1px solid var(--border);
}
.hero-stats li:last-child { padding-right: 0; margin-right: 0; border-right: none; }
.hero-stats strong { font-size: 1.35rem; color: var(--accent); letter-spacing: -0.01em; }
.hero-stats span { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }

/* ---------- Hero 右侧：双组轮播 + 3D 双屏动画 ---------- */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 520px;
  margin-left: auto;
  width: 100%;
  --hero-cycle: 7.5s;
}

.hero-carousel {
  position: relative;
  min-height: 380px;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}
.hero-slide.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.hero-slide-title {
  margin: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0 1rem;
}

.hero-scene-3d {
  position: relative;
  width: 100%;
  height: 280px;
  perspective: 920px;
  perspective-origin: 50% 42%;
  transform-style: preserve-3d;
}

.hero-monitor {
  position: absolute;
  width: 248px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(9, 13, 20, 0.82);
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(110, 231, 183, 0.06) inset;
  transform-style: preserve-3d;
  transform-origin: 50% 50%;
  backface-visibility: hidden;
  overflow: hidden;
}

.hero-monitor-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  background: rgba(129, 140, 248, 0.1);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}
.hero-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.hero-dot--pink { background: #f472b6; opacity: 0.75; }
.hero-dot--amber { background: #fbbf24; opacity: 0.55; }
.hero-dot--green { background: #6ee7b7; opacity: 0.55; }
.hero-monitor-title {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.hero-monitor-body {
  min-height: 148px;
  position: relative;
}

/* —— 第一组：UI 插件双屏 —— */
.hero-monitor--back {
  top: 12px;
  right: 8px;
  transform: rotateY(-68deg) rotateX(6deg) translate3d(0, 0, -48px);
  z-index: 1;
  opacity: 0.7;
}
.hero-monitor--front {
  top: 48px;
  left: 4px;
  transform: rotateY(10deg) rotateX(-5deg) translate3d(0, 0, 48px);
  z-index: 2;
}

.hero-slide--plugin.is-active .hero-monitor--back {
  animation: heroPluginCodeFlip var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
.hero-slide--plugin.is-active .hero-monitor--front {
  animation: heroPluginUiRecede var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
@keyframes heroPluginCodeFlip {
  0%, 36% {
    transform: rotateY(-68deg) rotateX(6deg) translate3d(0, 0, -48px);
  }
  48%, 100% {
    transform: rotateY(8deg) rotateX(-4deg) translate3d(-18px, 22px, 52px);
  }
}
@keyframes heroPluginUiRecede {
  0%, 36% {
    transform: rotateY(10deg) rotateX(-5deg) translate3d(0, 0, 48px);
  }
  48%, 100% {
    transform: rotateY(64deg) rotateX(5deg) translate3d(38px, -16px, -52px);
  }
}

.hero-monitor-body--code {
  padding: 0;
  overflow: hidden;
}
.hero-code-viewport {
  height: 120px;
  overflow: hidden;
  transform: translateZ(0);
  mask-image: linear-gradient(#000 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(#000 70%, transparent 100%);
}
.hero-code-track {
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 0.58rem;
  line-height: 1.55;
  animation: heroCodeScroll 12s linear infinite;
}
.hero-slide--plugin.is-active .hero-code-track {
  animation-play-state: running;
}
.hero-slide--plugin:not(.is-active) .hero-code-track {
  animation-play-state: paused;
}
@keyframes heroCodeScroll {
  0% { transform: translateY(0); }
  100% { transform: translateY(-50%); }
}
.hero-code-line { color: #94a3b8; white-space: nowrap; }
.hero-code-line--dim { color: rgba(148, 163, 184, 0.45); font-style: italic; }
.c-kw { color: #c084fc; }
.c-fn { color: #6ee7b7; }
.c-str { color: #fbbf24; }

.hero-monitor-body--ui {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 12px 14px 14px;
  position: relative;
}
.hero-ui-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}
.hero-ui-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 10px;
  border-radius: 7px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(15, 20, 32, 0.72);
  color: var(--muted);
}
.hero-ui-search-icon {
  flex-shrink: 0;
  color: rgba(110, 231, 183, 0.75);
}
.hero-ui-search-text {
  font-size: 0.62rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: rgba(148, 163, 184, 0.85);
}
.hero-ui-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.hero-ui-chart {
  height: 52px;
  border-radius: 7px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(9, 13, 20, 0.55);
  overflow: hidden;
}
.hero-ui-chart svg {
  display: block;
  width: 100%;
  height: 100%;
}
.hero-ui-btn {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 0.42rem 0.75rem;
  border: none;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  color: #0b0e14;
  background: var(--gradient);
  cursor: default;
  box-shadow: 0 2px 12px rgba(110, 231, 183, 0.25);
}
.hero-slide--plugin.is-active .hero-ui-btn {
  animation: heroBtnClick var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
.hero-slide--plugin.is-active .hero-ui-ripple {
  animation: heroBtnRipple var(--hero-cycle) ease-out forwards;
}
@keyframes heroBtnClick {
  0%, 34% { transform: scale(1); }
  38% { transform: scale(0.96); }
  42%, 100% { transform: scale(1); }
}
@keyframes heroBtnRipple {
  0%, 38% { opacity: 0; transform: scale(0.6); }
  40% { opacity: 0.5; transform: scale(1); }
  48%, 100% { opacity: 0; transform: scale(2.2); }
}
.hero-ui-ripple {
  position: absolute;
  left: 50%;
  bottom: 18px;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: rgba(110, 231, 183, 0.5);
  opacity: 0;
  pointer-events: none;
}

.hero-ui-cursor {
  position: absolute;
  left: 78%;
  top: 12%;
  z-index: 4;
  width: 20px;
  height: 28px;
  opacity: 0;
  pointer-events: none;
  transform-origin: 0 0;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}
.hero-slide--plugin.is-active .hero-ui-cursor {
  animation: heroUiCursor var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
@keyframes heroUiCursor {
  0%, 16% {
    opacity: 0;
    left: 78%;
    top: 12%;
    transform: scale(1);
  }
  20% {
    opacity: 1;
    left: 78%;
    top: 12%;
    transform: scale(1);
  }
  28%, 33% {
    opacity: 1;
    left: 50%;
    top: 82%;
    transform: scale(1);
  }
  37% {
    opacity: 1;
    left: 50%;
    top: 82%;
    transform: scale(0.82);
  }
  39% {
    opacity: 1;
    left: 50%;
    top: 82%;
    transform: scale(1);
  }
  43%, 100% {
    opacity: 0;
    left: 50%;
    top: 82%;
    transform: scale(1);
  }
}

/* —— 第二组：录轨回放双屏 —— */
.hero-scene-trace {
  height: 280px;
}

.hero-monitor--record {
  top: 20px;
  left: 12px;
  transform: rotateY(4deg) rotateX(-2deg) translateZ(30px);
  z-index: 2;
}
.hero-monitor--replay {
  top: 8px;
  right: 4px;
  transform: rotateY(-72deg) rotateX(6deg) translateZ(-40px);
  z-index: 1;
  opacity: 0.55;
}

.hero-slide--trace.is-active .hero-monitor--record {
  animation: heroRecordShift var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
.hero-slide--trace.is-active .hero-monitor--replay {
  animation: heroReplayFlip var(--hero-cycle) cubic-bezier(0.45, 0, 0.55, 1) forwards;
}
@keyframes heroRecordShift {
  0%, 36% {
    transform: rotateY(4deg) rotateX(-2deg) translate3d(0, 0, 30px);
  }
  48%, 100% {
    transform: rotateY(-6deg) rotateX(4deg) translate3d(-8px, 6px, -30px);
  }
}
@keyframes heroReplayFlip {
  0%, 36% {
    transform: rotateY(-72deg) rotateX(6deg) translate3d(0, 0, -40px);
  }
  48%, 100% {
    transform: rotateY(8deg) rotateX(-4deg) translate3d(-60px, 28px, 50px);
  }
}

.hero-monitor-body--trace {
  padding: 8px;
}
.hero-trace-svg,
.hero-replay-svg {
  display: block;
  width: 100%;
  height: auto;
}

.hero-trace-path-draw,
.hero-replay-path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

.hero-record-cursor,
.hero-ai-cursor {
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.hero-trace-cursor {
  opacity: 0;
}
.hero-slide--trace.is-active .hero-trace-cursor {
  animation: heroCursorVisible var(--hero-cycle) linear forwards;
}
@keyframes heroCursorVisible {
  0%, 5% { opacity: 0; }
  6%, 36% { opacity: 1; }
  36%, 100% { opacity: 0; }
}

.hero-ai-drawer {
  opacity: 0;
  pointer-events: none;
}
.hero-slide--trace.is-active .hero-ai-drawer {
  animation: heroAiDrawerVisible var(--hero-cycle) linear forwards;
}
@keyframes heroAiDrawerVisible {
  0%, 47% { opacity: 0; }
  48%, 100% { opacity: 1; }
}

.hero-rec-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #f472b6;
  opacity: 0;
}
.hero-slide--trace.is-active .hero-rec-badge {
  animation: heroRecBlink var(--hero-cycle) linear forwards;
}
@keyframes heroRecBlink {
  0%, 5% { opacity: 0; }
  6%, 36% { opacity: 1; }
  36%, 100% { opacity: 0; }
}

/* 轮播指示点 */
.hero-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}
.hero-carousel-dot {
  width: 28px;
  height: 4px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.25);
  cursor: pointer;
  transition: background 0.3s, width 0.3s;
}
.hero-carousel-dot.is-active {
  width: 40px;
  background: var(--gradient);
}
.hero-carousel-dot:hover:not(.is-active) {
  background: rgba(148, 163, 184, 0.45);
}

.hero-feature-cards {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  width: 100%;
}
.hero-feature-card {
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(9, 13, 20, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 0.35s, background 0.35s, box-shadow 0.35s, opacity 0.85s;
  opacity: 0.45;
}
.hero-feature-card.active {
  opacity: 1;
  border-color: rgba(110, 231, 183, 0.45);
  background: rgba(110, 231, 183, 0.06);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}
.hero-feature-card[data-hero-feature="trace"].active {
  border-color: rgba(129, 140, 248, 0.45);
  background: rgba(129, 140, 248, 0.06);
}
.hero-feature-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
}
.hero-feature-tag--trace { color: var(--accent2); }
.hero-feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.hero-feature-card p {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}
.hero-feature-card code {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: rgba(110, 231, 183, 0.85);
  word-break: break-all;
}

@media (max-width: 900px) {
  .hero-visual { margin-left: 0; margin-right: auto; }
  .hero-scene-3d { height: 260px; }
  .hero-monitor { width: 220px; }
  .hero-slide--trace.is-active .hero-monitor--replay {
    animation-name: heroReplayFlipMobile;
  }
}
@keyframes heroReplayFlipMobile {
  0%, 36% {
    transform: rotateY(-72deg) rotateX(6deg) translate3d(0, 0, -40px);
  }
  48%, 100% {
    transform: rotateY(8deg) rotateX(-4deg) translate3d(-40px, 24px, 50px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide,
  .hero-monitor,
  .hero-code-track,
  .hero-ui-btn,
  .hero-ui-ripple,
  .hero-ui-cursor,
  .hero-trace-path-draw,
  .hero-replay-path,
  .hero-trace-cursor,
  .hero-ai-drawer,
  .hero-rec-badge {
    animation: none !important;
  }
  .hero-trace-path-draw,
  .hero-replay-path { stroke-dashoffset: 0; }
  .hero-trace-cursor,
  .hero-rec-badge { opacity: 1; }
  .hero-ai-drawer { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

/* 保留 flow-step 供其它页复用 */
.flow-step {
  padding: 0.32rem 0.75rem; font-size: 0.73rem;
  border: 1px solid var(--border); border-radius: 999px;
  color: var(--muted); transition: all 0.3s;
  letter-spacing: 0.01em;
}
.flow-step.active {
  border-color: var(--accent); color: var(--accent);
  background: rgba(110, 231, 183, 0.08);
}

/* Companion 浮层控件（深色细线毛玻璃） */
.companion-shell {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 330px;
  margin-left: auto;
  margin-right: auto;
  padding: 14px;
  border-radius: 14px;
  background: rgba(9, 13, 20, 0.55);
  border: 1px solid var(--border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.companion-tool-row {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
}
/* 图标悬浮介绍 */
.tip { position: relative; display: inline-flex; }
.tip-pop {
  position: absolute;
  bottom: calc(100% + 11px);
  left: 50%;
  transform: translate(-50%, 5px);
  min-width: 148px;
  max-width: 220px;
  padding: 0.55rem 0.8rem;
  background: rgba(10, 14, 22, 0.94);
  border: 1px solid rgba(110, 231, 183, 0.28);
  border-radius: 9px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 60;
  text-align: left;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}
.tip-pop::after {
  content: ""; position: absolute; top: 100%; left: 50%;
  margin-left: -5px;
  border: 5px solid transparent;
  border-top-color: rgba(10, 14, 22, 0.94);
}
.tip-title {
  display: block;
  font-size: 11px; font-weight: 700; color: var(--accent);
  letter-spacing: 0.02em; margin-bottom: 2px;
  white-space: nowrap;
}
.tip-desc {
  display: block;
  font-size: 10.5px; line-height: 1.5; color: var(--muted);
}
.tip:hover .tip-pop,
.tip:focus-within .tip-pop {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
.icon-btn {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: rgba(255, 255, 255, 0.68);
  cursor: pointer;
  transition: all 0.18s;
}
.icon-btn:hover { border-color: rgba(110, 231, 183, 0.6); color: var(--accent); background: rgba(110, 231, 183, 0.06); transform: translateY(-1px); }
.workspace-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  width: 100%;
}
.workspace-bar > .tip {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
}
.workspace-btn {
  flex: 1;
  min-width: 0;
  max-width: 96px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 7px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: rgba(255, 255, 255, 0.68);
  font-size: 10px;
  cursor: pointer;
  transition: all 0.18s;
}
.workspace-btn:hover { border-color: rgba(110, 231, 183, 0.55); color: var(--accent); transform: translateY(-1px); }
.workspace-btn-icon { font-size: 11px; line-height: 1; }
.workspace-btn-label {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.workspace-tools {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  margin-left: auto;
}
.workspace-tool-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: rgba(255, 255, 255, 0.68);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s;
}
.workspace-tool-btn:hover { border-color: rgba(110, 231, 183, 0.55); color: var(--accent); background: rgba(110, 231, 183, 0.06); transform: translateY(-1px); }
.input-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  width: 100%;
  padding: 4px 4px 4px 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-strong);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.input-bar:focus-within {
  border-color: rgba(110, 231, 183, 0.6);
  box-shadow: 0 0 0 3px rgba(110, 231, 183, 0.12);
  background: rgba(255, 255, 255, 0.09);
}
.input-bar input {
  flex: 1;
  min-width: 0;
  height: 26px;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, 0.94);
  padding: 0 4px;
  font-size: 12px;
  outline: none;
  font-family: var(--font);
  caret-color: var(--accent);
}
.input-bar input::placeholder { color: rgba(255, 255, 255, 0.42); }
.mic-btn { color: #fbbf24; }
.mic-btn:hover { border-color: rgba(251, 191, 36, 0.6); color: #fbbf24; background: rgba(251, 191, 36, 0.06); transform: translateY(-1px); }
.send-btn { color: var(--accent); }
.send-btn:hover { border-color: rgba(110, 231, 183, 0.6); color: var(--accent); background: rgba(110, 231, 183, 0.06); transform: translateY(-1px); }

/* ---------- 区块 ---------- */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 {
  font-size: 1.65rem; margin: 0 0 0.6rem;
  display: flex; align-items: center; gap: 0.7rem;
  letter-spacing: -0.01em;
}
.section h2::before {
  content: ""; width: 3px; height: 1.1em; border-radius: 2px;
  background: var(--gradient);
}
.section-desc { color: var(--muted); margin-bottom: 2.25rem; }

/* ---------- 功能卡片（细线风格） ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem 1.5rem;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.card::before {
  content: ""; position: absolute; left: 1.5rem; right: 1.5rem; top: 0; height: 1px;
  background: var(--gradient); opacity: 0; transition: opacity 0.25s ease;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.04);
}
.card:hover::before { opacity: 1; }
.card h3 { margin: 0 0 0.7rem; font-size: 1.05rem; }
.card p { color: var(--muted); font-size: 0.92rem; margin: 0 0 1rem; line-height: 1.65; }
.card code {
  display: block; font-family: var(--mono); font-size: 0.7rem;
  color: var(--accent2); background: rgba(10, 14, 20, 0.6);
  padding: 0.7rem 0.8rem; border-radius: 6px; overflow-x: auto;
  border: 1px solid rgba(129, 140, 248, 0.12);
}

/* ---------- 架构图 ---------- */
.arch-diagram {
  font-family: var(--mono); font-size: 0.72rem; line-height: 1.5;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem; overflow-x: auto;
  color: var(--muted);
  transition: border-color 0.25s ease;
}
.arch-diagram:hover { border-color: var(--border-strong); }

/* ---------- 步骤 ---------- */
.steps { padding-left: 1.3rem; }
.steps li { margin-bottom: 2rem; padding-left: 0.3rem; }
.steps li::marker { color: var(--accent); font-weight: 700; }
.steps h3 { margin: 0 0 0.5rem; font-size: 1.02rem; }
.steps h4 { margin: 0 0 0.35rem; font-size: 0.98rem; }
.steps p { color: var(--muted); margin: 0.5rem 0; }

pre {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 1rem; overflow-x: auto;
  line-height: 1.6;
}
pre code { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); }
code { font-family: var(--mono); font-size: 0.85em; color: var(--accent2); }
.more-docs { margin-top: 2rem; color: var(--muted); }
.more-docs a { color: var(--accent); text-decoration: none; }
.more-docs a:hover { text-decoration: underline; }

/* ---------- CTA ---------- */
.cta-section { padding-bottom: 5rem; }
.cta-box {
  position: relative;
  text-align: center; padding: 3.5rem 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
}
.cta-box::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% -20%, rgba(129, 140, 248, 0.10), transparent 70%);
  pointer-events: none;
}
.cta-box h2 { margin-bottom: 0.5rem; justify-content: center; }
.cta-box h2::before { display: none; }
.cta-box p { color: var(--muted); margin-bottom: 1.75rem; position: relative; }
.cta-box .hero-cta { justify-content: center; position: relative; }

/* ---------- 二级页面：安装教程 ---------- */
.inline-link { color: var(--accent); text-decoration: none; }
.inline-link:hover { text-decoration: underline; }

.page-hero {
  padding: 3.5rem 0 2.75rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 45% at 15% -10%, rgba(129, 140, 248, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 40% at 100% 30%, rgba(110, 231, 183, 0.05), transparent 70%);
}
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.6rem); margin: 0 0 0.75rem; letter-spacing: -0.01em; }
.page-hero .lead { color: var(--muted); max-width: 40rem; margin-bottom: 1.75rem; }
.page-toc { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.toc-chip {
  display: inline-flex; align-items: center;
  padding: 0.42rem 1.05rem; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted);
  text-decoration: none; font-size: 0.84rem; font-weight: 500;
  transition: all 0.2s;
  background: transparent;
}
.toc-chip:hover { border-color: var(--accent); color: var(--accent); background: rgba(110, 231, 183, 0.05); }

.doc-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3.5rem;
  align-items: start;
}
@media (max-width: 900px) {
  .doc-grid { grid-template-columns: 1fr; gap: 2rem; }
}
.doc-side {
  position: sticky; top: 84px;
  padding-right: 1.5rem; border-right: 1px solid var(--border);
}
@media (max-width: 900px) {
  .doc-side { position: static; border-right: none; padding-right: 0; }
}
.doc-side h2 {
  font-size: 1.4rem; margin: 0.75rem 0;
  display: flex; align-items: center; gap: 0.6rem;
}
.doc-side h2::before { content: ""; width: 3px; height: 1em; border-radius: 2px; background: var(--gradient); }
.doc-note { color: var(--muted); font-size: 0.9rem; margin: 0; }
.step-badge {
  display: inline-block;
  padding: 0.22rem 0.75rem; border-radius: 999px;
  border: 1px solid rgba(110, 231, 183, 0.35); color: var(--accent);
  background: transparent;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em;
}
.step-badge-accent { border-color: rgba(129, 140, 248, 0.4); color: var(--accent2); }
.doc-body { min-width: 0; }
.doc-body h3 { font-size: 1.15rem; margin: 1.75rem 0 0.75rem; }
.doc-body h4 { font-size: 1rem; margin: 0 0 0.35rem; }
.doc-body .steps p { margin: 0 0 0.5rem; }
.doc-body pre { margin: 0.75rem 0 1rem; }
.doc-body .hint { color: var(--muted); font-size: 0.9rem; }

.perm-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.3rem 1.5rem; margin-bottom: 1.25rem;
  transition: border-color 0.25s ease;
}
.perm-card:hover { border-color: var(--border-strong); }
.perm-head { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 0.75rem; }
.perm-icon {
  flex-shrink: 0; font-size: 1.3rem;
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); background: transparent;
}
.perm-head h3 { margin: 0 0 0.25rem; }
.perm-purpose { color: var(--muted); font-size: 0.9rem; margin: 0; }
.perm-tag {
  flex-shrink: 0; margin-left: auto;
  padding: 0.18rem 0.65rem; border-radius: 999px;
  font-size: 0.7rem; font-weight: 600;
  border: 1px solid rgba(110, 231, 183, 0.35); color: var(--accent);
}
.perm-steps { padding-left: 1.1rem; margin: 0; }
.perm-steps li { color: var(--muted); font-size: 0.92rem; margin-bottom: 0.4rem; }
.perm-steps code { font-size: 0.85em; }

.faq-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.95rem 1.3rem; margin-bottom: 0.85rem;
  transition: border-color 0.25s ease;
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-item summary {
  cursor: pointer; font-weight: 600; font-size: 0.97rem;
  list-style: none; display: flex; align-items: center; gap: 0.6rem;
  color: var(--text);
}
.faq-item summary::before {
  content: "+"; color: var(--accent); font-size: 1.05rem;
  transition: transform 0.25s ease; display: inline-block; line-height: 1;
}
.faq-item[open] summary::before { transform: rotate(45deg); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p { color: var(--muted); font-size: 0.92rem; margin: 0.75rem 0 0 1.4rem; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0; text-align: center;
  color: var(--muted); font-size: 0.84rem;
}
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .hero-stats li { padding-right: 1.2rem; margin-right: 1.2rem; }
  .nav { gap: 1.1rem; }
}