/* ============================================================
 * Screenshot Pro — Landing Page (Spatial Depth / Perspective)
 * 设计令牌借用 packages/shared/styles，落地页在此基础上做空间深度扩展。
 * ============================================================ */

:root {
  --bg: hsl(230 35% 96%);
  --bg-soft: hsl(230 40% 98%);
  --ink: hsl(230 35% 12%);
  --ink-soft: hsl(230 20% 40%);
  --ink-muted: hsl(230 15% 55%);
  --line: hsl(230 30% 88%);
  --line-strong: hsl(230 30% 82%);

  --primary: hsl(239 84% 67%);
  --primary-2: hsl(262 83% 66%);
  --primary-3: hsl(200 90% 60%);

  --accent: hsl(38 100% 50%);
  --danger: hsl(0 84% 60%);
  --green: hsl(142 71% 45%);
  --pink: hsl(335 85% 65%);
  --cyan: hsl(190 90% 55%);

  --card: #ffffff;
  --shadow-soft: 0 14px 28px -12px hsl(230 40% 30% / 0.18);
  --shadow-strong: 0 32px 60px -24px hsl(230 40% 30% / 0.35);
  --shadow-inset: inset 0 1px 0 hsl(0 0% 100% / 0.8);

  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 8px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --grad-primary: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  --grad-warm: linear-gradient(135deg, hsl(38 100% 55%), hsl(22 95% 60%));
  --grad-surface: linear-gradient(180deg, #ffffff 0%, hsl(230 40% 97%) 100%);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Poppins", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.shell {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

code {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.88em;
  background: hsl(230 40% 94%);
  padding: 2px 6px;
  border-radius: 6px;
  color: hsl(239 50% 45%);
}

.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }

/* ============ 背景层（等距网格 + 多层极光 + 暗角） ============ */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.iso-grid {
  position: absolute;
  inset: -10%;
  background-image:
    linear-gradient(hsl(230 40% 85% / 0.5) 1px, transparent 1px),
    linear-gradient(90deg, hsl(230 40% 85% / 0.5) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(900px) rotateX(62deg) rotateZ(45deg) translate(-8%, -12%);
  mask-image: radial-gradient(ellipse at 50% 40%, #000 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 40%, transparent 75%);
  opacity: 0.55;
  animation: grid-drift 22s ease-in-out infinite alternate;
}

@keyframes grid-drift {
  from { transform: perspective(900px) rotateX(62deg) rotateZ(45deg) translate(-8%, -12%); }
  to { transform: perspective(900px) rotateX(62deg) rotateZ(45deg) translate(-4%, -16%); }
}

.grad-aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  mix-blend-mode: multiply;
  animation: aurora-drift 18s ease-in-out infinite alternate;
}
.grad-aurora-1 {
  width: 620px; height: 620px;
  top: -200px; left: -180px;
  background: radial-gradient(circle, hsl(262 85% 70% / 0.55), transparent 60%);
}
.grad-aurora-2 {
  width: 520px; height: 520px;
  top: 140px; right: -160px;
  background: radial-gradient(circle, hsl(200 90% 70% / 0.45), transparent 60%);
  animation-delay: -4s;
}
.grad-aurora-3 {
  width: 720px; height: 720px;
  bottom: -320px; left: 30%;
  background: radial-gradient(circle, hsl(38 100% 70% / 0.35), transparent 60%);
  animation-delay: -8s;
}

@keyframes aurora-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(40px, -30px, 0) scale(1.06); }
}

.grad-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, transparent 40%, hsl(230 40% 95% / 0.7) 100%),
    linear-gradient(180deg, hsl(230 40% 98% / 0) 0%, hsl(230 40% 96% / 0.8) 80%);
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image:
    radial-gradient(circle at 20% 30%, #000 0.5px, transparent 1px),
    radial-gradient(circle at 70% 60%, #000 0.5px, transparent 1px),
    radial-gradient(circle at 40% 80%, #000 0.5px, transparent 1px);
  background-size: 4px 4px, 6px 6px, 5px 5px;
  pointer-events: none;
}

/* ============ 导航 ============ */
.nav {
  position: sticky;
  top: 12px;
  z-index: 50;
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: hsl(230 40% 99% / 0.7);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border: 1px solid hsl(230 30% 90%);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px -16px hsl(230 40% 30% / 0.2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.brand-logo {
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, hsl(239 84% 67% / 0.15), hsl(262 83% 66% / 0.15));
  border: 1px solid hsl(239 84% 67% / 0.25);
  box-shadow: inset 0 1px 0 hsl(0 0% 100% / 0.6), 0 6px 16px -8px hsl(239 84% 60% / 0.35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-title { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }
.brand-sub { font-size: 11px; color: var(--ink-muted); letter-spacing: 0.08em; text-transform: uppercase; }

.nav-links { display: flex; gap: 8px; }
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: 10px;
  text-decoration: none;
  transition: color 0.2s, background 0.2s, transform 0.2s;
}
.nav-links a:hover {
  color: var(--ink);
  background: hsl(230 40% 94%);
  transform: translateY(-1px);
}

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

/* ============ 语言切换 ============ */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: hsl(230 40% 96%);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.lang-btn {
  min-width: 36px;
  height: 28px;
  padding: 0 10px;
  background: transparent;
  border: none;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-muted);
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  font-family: inherit;
}
.lang-btn:hover { color: var(--ink); }
.lang-btn.active {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 2px 6px -1px hsl(239 84% 67% / 0.25), 0 1px 2px hsl(230 40% 30% / 0.08);
}

/* ============ 通用组件增强 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--ease-spring), box-shadow 0.25s, background 0.25s, color 0.25s;
}
.btn-lg { height: 52px; padding: 0 26px; font-size: 15px; border-radius: 14px; }
.btn-sm { height: 36px; padding: 0 14px; font-size: 13px; }

.btn-gradient {
  color: #fff;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  box-shadow: 0 14px 28px -12px hsl(262 84% 60% / 0.6), inset 0 1px 0 hsl(0 0% 100% / 0.25);
}
.btn-gradient:hover { transform: translateY(-2px); box-shadow: 0 22px 42px -14px hsl(262 84% 60% / 0.7), inset 0 1px 0 hsl(0 0% 100% / 0.25); }
.btn-gradient:active { transform: translateY(0) scale(0.98); }

.btn-outline {
  color: var(--ink);
  background: #fff;
  border-color: var(--line-strong);
  box-shadow: 0 2px 0 hsl(230 30% 90%), inset 0 1px 0 hsl(0 0% 100%);
}
.btn-outline:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 10px 24px -12px hsl(239 84% 60% / 0.4);
}

.w-full { width: 100%; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-muted {
  background: hsl(230 40% 94%);
  color: var(--ink-soft);
  border-color: var(--line);
}
.badge-gradient {
  color: #fff;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  box-shadow: 0 6px 14px -6px hsl(262 84% 60% / 0.55);
}
.badge-purple {
  background: hsl(262 84% 66% / 0.12);
  color: hsl(262 70% 48%);
  border-color: hsl(262 84% 66% / 0.3);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-soft);
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 0 0 4px hsl(239 84% 67% / 0.12);
}
.eyebrow.muted { background: hsl(230 40% 98%); border-color: var(--line); }

.grad-text {
  background: linear-gradient(135deg, hsl(239 84% 55%), hsl(262 83% 60%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text-2 {
  background: linear-gradient(135deg, hsl(190 90% 48%), hsl(160 80% 50%));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.kbd {
  display: inline-block;
  padding: 3px 8px;
  min-width: 22px;
  text-align: center;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
}

/* ============ Hero ============ */
.hero { padding: 64px 0 48px; }
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.hero-copy { position: relative; z-index: 2; }

.display {
  font-family: "Oswald", "Poppins", sans-serif;
  font-size: clamp(40px, 5.8vw, 76px);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 20px 0 20px;
  color: var(--ink);
}

.lede {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 36px; }

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  list-style: none;
  padding: 16px;
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  max-width: 560px;
}
.hero-meta li { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hero-meta strong {
  font-family: "Oswald", sans-serif;
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.01em;
}
.hero-meta span { font-size: 12px; color: var(--ink-muted); font-weight: 500; }

/* Hero 三维舞台 */
.hero-stage {
  position: relative;
  height: 520px;
  perspective: 1400px;
}

.stage-platform {
  position: absolute;
  left: 50%;
  top: 72%;
  transform: translate(-50%, -50%) rotateX(60deg) rotateZ(-20deg);
  width: 520px;
  height: 520px;
  transform-style: preserve-3d;
}
.platform-top {
  position: absolute;
  inset: 0;
  border-radius: 32px;
  background:
    linear-gradient(135deg, hsl(239 84% 67% / 0.06), hsl(262 83% 66% / 0.12)),
    repeating-linear-gradient(45deg, hsl(230 30% 85% / 0.4) 0 2px, transparent 2px 32px),
    repeating-linear-gradient(-45deg, hsl(230 30% 85% / 0.4) 0 2px, transparent 2px 32px);
  border: 1px solid hsl(230 30% 85%);
  box-shadow: 0 40px 80px -20px hsl(239 84% 60% / 0.3);
}
.platform-left,
.platform-right {
  position: absolute;
  background: linear-gradient(180deg, hsl(230 40% 92%), hsl(230 40% 82%));
}
.platform-left {
  left: 0; top: 0; bottom: 0; width: 24px;
  transform-origin: right center;
  transform: rotateY(-90deg);
  border-radius: 8px 0 0 8px;
}
.platform-right {
  right: 0; top: 0; bottom: 0; width: 24px;
  transform-origin: left center;
  transform: rotateY(90deg);
  border-radius: 0 8px 8px 0;
}

/* 等距窗口 */
.iso-window {
  position: absolute;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-strong), inset 0 1px 0 hsl(0 0% 100% / 0.8);
  overflow: hidden;
  transform-style: preserve-3d;
}

.iso-window-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: linear-gradient(180deg, hsl(230 40% 98%), hsl(230 40% 95%));
  border-bottom: 1px solid var(--line);
}
.iso-window-top.compact { padding: 10px 12px; }
.iso-window-top .dot-r,
.iso-window-top .dot-y,
.iso-window-top .dot-g {
  width: 11px; height: 11px; border-radius: 50%;
  box-shadow: inset 0 -1px 0 hsl(0 0% 0% / 0.15);
}
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.iso-window-top .title {
  margin-left: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.iso-window-top .spacer { flex: 1; }

.iso-window-body {
  padding: 16px;
  background: linear-gradient(180deg, #fff 0%, hsl(230 40% 98%) 100%);
}
.iso-window-body.compact { padding: 12px; }

.editor-toolbar {
  display: flex;
  gap: 6px;
  padding: 6px;
  background: hsl(230 40% 97%);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 12px;
}
.editor-toolbar span {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: inset 0 -1px 0 hsl(0 0% 0% / 0.04);
}
.editor-toolbar span:nth-child(2n) { background: linear-gradient(135deg, hsl(239 84% 67% / 0.15), hsl(262 83% 66% / 0.15)); }
.editor-toolbar span:nth-child(3n) { background: hsl(142 71% 45% / 0.12); }

.editor-canvas-area {
  padding: 12px;
  background: linear-gradient(135deg, hsl(230 40% 99%), hsl(230 40% 96%));
  border: 1px dashed var(--line);
  border-radius: 12px;
}
.mini-canvas {
  position: relative;
  height: 180px;
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--line);
  overflow: hidden;
}
.mini-bar {
  position: absolute;
  left: 20px; right: 20px;
  height: 12px;
  border-radius: 6px;
  background: hsl(230 30% 88%);
}
.bar-a { top: 30px; width: 60%; }
.bar-b { top: 60px; width: 40%; background: linear-gradient(90deg, var(--primary), var(--primary-2)); box-shadow: 0 8px 20px -8px hsl(262 84% 60% / 0.4); }
.bar-c { top: 90px; width: 75%; background: hsl(190 70% 80%); }
.bar-b, .bar-c { animation: bar-slide 4s var(--ease-out) infinite; }
@keyframes bar-slide {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(12px); }
}

.mini-arrow {
  position: absolute;
  left: 46px; top: 110px;
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, hsl(142 71% 45%), hsl(160 70% 50%));
  box-shadow: 0 10px 18px -10px hsl(142 71% 45% / 0.6);
}
.mini-arrow::after {
  content: "";
  position: absolute;
  right: -6px; top: -6px;
  width: 0; height: 0;
  border: 8px solid transparent;
  border-left-color: hsl(160 70% 50%);
}

.mini-badge {
  position: absolute;
  right: 14px; bottom: 14px;
  padding: 8px 14px;
  border-radius: 10px;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  box-shadow: 0 12px 24px -10px hsl(262 84% 60% / 0.6), inset 0 1px 0 hsl(0 0% 100% / 0.25);
  transform: rotate(-4deg);
}
.mini-badge .kbd {
  background: hsl(0 0% 100% / 0.18);
  border-color: hsl(0 0% 100% / 0.3);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
}

.iso-window-main {
  left: 52%;
  top: 6%;
  width: 380px;
  transform: translate(-50%, 0) rotateY(-14deg) rotateX(10deg) rotateZ(-2deg) translateZ(40px);
  animation: window-float 7s ease-in-out infinite;
}
@keyframes window-float {
  0%, 100% { transform: translate(-50%, 0) rotateY(-14deg) rotateX(10deg) rotateZ(-2deg) translateZ(40px) translateY(0); }
  50% { transform: translate(-50%, 0) rotateY(-14deg) rotateX(10deg) rotateZ(-2deg) translateZ(40px) translateY(-10px); }
}

.iso-window-side {
  left: 4%;
  top: 42%;
  width: 220px;
  transform: rotateY(18deg) rotateX(10deg) rotateZ(3deg);
  animation: window-float-slow 9s ease-in-out infinite;
}
@keyframes window-float-slow {
  0%, 100% { transform: rotateY(18deg) rotateX(10deg) rotateZ(3deg) translateY(0); }
  50% { transform: rotateY(18deg) rotateX(10deg) rotateZ(3deg) translateY(-8px); }
}

.rec-line {
  height: 18px;
  border-radius: 6px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, hsl(239 84% 67% / 0.18), hsl(239 84% 67% / 0.55));
  position: relative;
  overflow: hidden;
}
.rec-line.alt { background: linear-gradient(90deg, hsl(262 83% 66% / 0.18), hsl(262 83% 66% / 0.55)); width: 80%; }
.rec-line.alt2 { background: linear-gradient(90deg, hsl(142 71% 45% / 0.18), hsl(142 71% 45% / 0.55)); width: 60%; }

.rec-dot {
  position: absolute;
  right: 14px; bottom: 14px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: hsl(0 84% 60%);
  box-shadow: 0 0 0 4px hsl(0 84% 60% / 0.2);
  animation: rec-pulse 1.6s ease-in-out infinite;
}
@keyframes rec-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 4px hsl(0 84% 60% / 0.2); }
  50% { opacity: 0.7; box-shadow: 0 0 0 8px hsl(0 84% 60% / 0.1); }
}
.rec-time {
  position: absolute;
  left: 14px; bottom: 14px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-soft);
}

/* 漂浮小卡片 */
.floating-card {
  position: absolute;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-strong);
  min-width: 140px;
  animation: float-card 6s ease-in-out infinite;
}
.f-card-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.f-card-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 2px;
}

.f-card-1 {
  top: 10px; right: 0;
  transform: rotate(4deg);
  animation-delay: -1s;
}
.f-card-2 {
  bottom: 80px; right: -20px;
  transform: rotate(-3deg);
  animation-delay: -3s;
}
.f-card-3 {
  bottom: 10px; left: 20px;
  transform: rotate(-6deg);
  animation-delay: -2s;
}
.f-card-1 .f-card-label { color: hsl(239 84% 55%); }
.f-card-2 .f-card-label { color: hsl(262 70% 50%); }
.f-card-3 .f-card-label { color: hsl(38 100% 50%); }

@keyframes float-card {
  0%, 100% { transform: translateY(0) rotate(var(--r, 0deg)); }
  50% { transform: translateY(-12px) rotate(var(--r, 0deg)); }
}

/* Logo 墙 */
.logo-wall {
  margin-top: 80px;
  padding: 20px 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}
.logo-wall-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding-right: 24px;
  border-right: 1px solid var(--line);
}
.logo-wall-item {
  font-family: "Oswald", sans-serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  opacity: 0.75;
  transition: color 0.2s, opacity 0.2s, transform 0.2s;
}
.logo-wall-item:hover { color: var(--primary); opacity: 1; transform: translateY(-1px); }

/* ============ Section 头 ============ */
.section-head {
  max-width: 760px;
  margin: 120px 0 56px;
}
.section-head.center { margin-inline: auto; text-align: center; }
.section-title {
  font-family: "Oswald", "Poppins", sans-serif;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 18px 0 14px;
}
.section-desc {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.7;
  max-width: 600px;
}
.section-head.center .section-desc { margin-inline: auto; }

/* ============ Feature 网格 ============ */
.features { padding-bottom: 40px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  position: relative;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s, border-color 0.3s;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, hsl(239 84% 67% / 0.04) 100%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-strong);
  border-color: hsl(239 84% 67% / 0.35);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  color: #fff;
  box-shadow: inset 0 1px 0 hsl(0 0% 100% / 0.25), 0 10px 22px -8px currentColor;
}
.icon-blue { background: linear-gradient(135deg, hsl(220 90% 60%), hsl(210 90% 55%)); color: hsl(210 90% 55% / 0.65); }
.icon-purple { background: linear-gradient(135deg, hsl(262 84% 66%), hsl(244 84% 60%)); color: hsl(262 84% 66% / 0.6); }
.icon-green { background: linear-gradient(135deg, hsl(142 71% 45%), hsl(160 70% 48%)); color: hsl(142 71% 45% / 0.55); }
.icon-accent { background: linear-gradient(135deg, hsl(38 100% 55%), hsl(22 95% 58%)); color: hsl(38 100% 55% / 0.6); }
.icon-pink { background: linear-gradient(135deg, hsl(335 85% 65%), hsl(320 80% 60%)); color: hsl(335 85% 65% / 0.55); }
.icon-cyan { background: linear-gradient(135deg, hsl(190 90% 55%), hsl(170 85% 48%)); color: hsl(190 90% 55% / 0.55); }
.feature-icon svg { color: #fff; }

.feature-card h3 {
  font-family: "Oswald", sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.feature-card p { color: var(--ink-soft); font-size: 14.5px; line-height: 1.7; margin: 0 0 16px; }

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-soft);
  font-weight: 500;
}
.tick {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, hsl(142 71% 45%), hsl(160 70% 50%));
  box-shadow: inset 0 1px 0 hsl(0 0% 100% / 0.25);
  position: relative;
  flex-shrink: 0;
}
.tick::after {
  content: "";
  position: absolute;
  left: 5px; top: 2px;
  width: 5px; height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* 等距倾斜（鼠标跟随） */
.iso-tilt {
  transform-style: preserve-3d;
  transform: perspective(900px) rotateX(4deg) rotateY(-4deg);
  transition: transform 0.4s var(--ease-spring), box-shadow 0.4s;
}
.iso-tilt:hover {
  transform: perspective(900px) rotateX(0deg) rotateY(0deg) translateY(-6px);
}

/* ============ Workflow 三维步骤 ============ */
.workflow { padding-bottom: 40px; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin-top: 20px;
}

.step {
  position: relative;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  text-align: center;
}
.step h3 {
  font-family: "Oswald", sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin: 24px 0 8px;
}
.step p { color: var(--ink-soft); font-size: 14.5px; line-height: 1.7; margin: 0; }

.step-iso {
  position: relative;
  height: 160px;
  perspective: 800px;
  display: grid;
  place-items: center;
}
.iso-body {
  position: relative;
  width: 140px;
  height: 90px;
  transform-style: preserve-3d;
  transform: rotateX(60deg) rotateZ(-20deg);
  animation: iso-bob 6s ease-in-out infinite;
}
.iso-2 .iso-body { animation-delay: -1.5s; }
.iso-3 .iso-body { animation-delay: -3s; }

@keyframes iso-bob {
  0%, 100% { transform: rotateX(60deg) rotateZ(-20deg) translateY(0); }
  50% { transform: rotateX(60deg) rotateZ(-20deg) translateY(-8px); }
}

.iso-rect {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  box-shadow: 0 20px 40px -16px hsl(262 84% 60% / 0.55), inset 0 1px 0 hsl(0 0% 100% / 0.25);
}
.iso-2 .iso-rect { background: linear-gradient(135deg, hsl(190 90% 55%), hsl(160 70% 50%)); box-shadow: 0 20px 40px -16px hsl(160 70% 50% / 0.55), inset 0 1px 0 hsl(0 0% 100% / 0.25); }
.iso-3 .iso-rect { background: linear-gradient(135deg, hsl(38 100% 55%), hsl(22 95% 58%)); box-shadow: 0 20px 40px -16px hsl(22 95% 58% / 0.55), inset 0 1px 0 hsl(0 0% 100% / 0.25); }

.iso-side-l,
.iso-side-r {
  position: absolute;
  left: 0; right: 0;
  height: 40px;
  background: linear-gradient(180deg, hsl(239 84% 55%), hsl(239 84% 40%));
  transform-origin: top center;
  transform: rotateX(-90deg);
  top: 0;
  border-radius: 0 0 8px 8px;
  filter: brightness(0.85);
}
.iso-side-r {
  transform-origin: left center;
  transform: rotateY(90deg);
  left: auto; right: 0;
  top: 0; bottom: 0;
  height: auto;
  width: 40px;
  filter: brightness(0.92);
}
.iso-2 .iso-side-l, .iso-2 .iso-side-r { background: linear-gradient(180deg, hsl(190 80% 48%), hsl(190 80% 38%)); }
.iso-3 .iso-side-l, .iso-3 .iso-side-r { background: linear-gradient(180deg, hsl(22 95% 50%), hsl(22 95% 38%)); }

.iso-badge {
  position: absolute;
  right: -16px; top: -16px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-strong);
  display: grid;
  place-items: center;
  font-family: "Oswald", sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  transform: translateZ(40px);
}

/* ============ Scenarios 使用场景 ============ */
.scenarios { padding-bottom: 40px; }

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}

.scenario-card {
  position: relative;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
}

.scenario-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, hsl(239 84% 67% / 0.12), hsl(262 83% 66% / 0.12));
  color: var(--primary);
  margin-bottom: 16px;
}
.scenario-icon.icon-accent { background: linear-gradient(135deg, hsl(22 95% 58% / 0.14), hsl(38 100% 55% / 0.14)); color: hsl(22 95% 58%); }
.scenario-icon.icon-purple { background: linear-gradient(135deg, hsl(262 83% 66% / 0.14), hsl(291 84% 58% / 0.14)); color: hsl(280 84% 60%); }
.scenario-icon.icon-green  { background: linear-gradient(135deg, hsl(142 72% 45% / 0.14), hsl(172 66% 40% / 0.14)); color: hsl(152 72% 42%); }
.scenario-icon.icon-cyan   { background: linear-gradient(135deg, hsl(200 90% 50% / 0.14), hsl(220 90% 55% / 0.14)); color: hsl(210 90% 55%); }
.scenario-icon.icon-pink   { background: linear-gradient(135deg, hsl(340 84% 60% / 0.14), hsl(12 90% 65% / 0.14)); color: hsl(340 84% 60%); }

.scenario-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background: hsl(239 84% 67% / 0.1);
  border-radius: 999px;
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ink);
}
.scenario-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.scenario-card .feature-list {
  list-style: none;
  padding: 0;
  margin: auto 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}
.scenario-card .feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 500;
}

/* ============ Manifesto 产品信条 ============ */
.manifesto { padding-bottom: 40px; }

.manifesto-card {
  position: relative;
  background:
    linear-gradient(135deg, hsl(239 84% 67% / 0.04), hsl(262 83% 66% / 0.04));
  border: 1px solid var(--line);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-strong);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  padding: 48px;
  overflow: hidden;
}

.manifesto-copy h2 {
  font-family: "Oswald", sans-serif;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 12px 0 10px;
  line-height: 1.1;
  color: var(--ink);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.principle {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-soft);
}

.principle-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, hsl(239 84% 67% / 0.1), hsl(262 83% 66% / 0.1));
  color: var(--primary);
  margin-bottom: 12px;
}

.principle h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
}
.principle p {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

.manifesto-stage {
  position: relative;
  min-height: 380px;
  display: grid;
  place-items: center;
}

.manifesto-window {
  width: 300px;
  transform: perspective(900px) rotateX(8deg) rotateY(-14deg) rotateZ(-2deg);
}

.manifesto-canvas {
  position: relative;
  height: 220px;
  background:
    linear-gradient(180deg, hsl(220 40% 98%), hsl(220 40% 96%));
  padding: 20px;
}

.manifesto-line {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, hsl(239 84% 67% / 0.35), hsl(262 83% 66% / 0.35));
  margin-bottom: 10px;
}
.manifesto-line.alt {
  height: 6px;
  width: 70%;
  background: hsl(230 20% 85%);
}

.manifesto-shape {
  position: absolute;
  border-radius: 8px;
}
.shape-square {
  width: 60px; height: 50px;
  left: 24px; top: 110px;
  background: hsl(38 100% 55% / 0.35);
  border: 2px solid hsl(38 100% 55% / 0.7);
}
.shape-circle {
  width: 54px; height: 54px;
  left: 100px; top: 100px;
  border-radius: 50%;
  background: hsl(152 72% 42% / 0.3);
  border: 2px solid hsl(152 72% 42% / 0.7);
}
.shape-arrow {
  width: 0; height: 0;
  left: 170px; top: 118px;
  background: transparent;
  border-left: 16px solid hsl(340 84% 60%);
  border-top: 14px solid transparent;
  border-bottom: 14px solid transparent;
}
.shape-sticker {
  width: 44px; height: 44px;
  left: 215px; top: 108px;
  background: hsl(262 83% 66% / 0.25);
  border: 2px solid hsl(262 83% 66% / 0.7);
  transform: rotate(-8deg);
  display: grid;
  place-items: center;
  color: hsl(262 83% 66%);
  font-size: 22px;
  font-weight: 700;
  content: "";
}

.manifesto-tag {
  position: absolute;
  left: -20px; bottom: -20px;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  color: #fff;
  padding: 14px 22px;
  border-radius: 14px;
  box-shadow: 0 18px 32px -12px hsl(262 84% 60% / 0.6);
  font-family: "Oswald", sans-serif;
  display: flex;
  align-items: baseline;
  gap: 8px;
  transform: rotate(-4deg);
}
.manifesto-tag .mono {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.manifesto-tag span:last-child {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.9;
}

/* ============ FAQ ============ */
.faq { padding-bottom: 40px; }

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  max-width: 1000px;
  margin: 0 auto;
}

.faq-item {
  position: relative;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.faq-item[open] {
  border-color: hsl(239 84% 67% / 0.35);
  box-shadow: var(--shadow-strong);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item .caret {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: hsl(230 40% 96%);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-spring), background 0.2s;
}
.faq-item[open] .caret { transform: rotate(45deg); background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; }

.faq-item p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* ============ CTA ============ */
.cta { padding: 60px 0 40px; }

.cta-stage {
  position: relative;
  padding: 60px 0 40px;
  perspective: 1200px;
}

.cta-card {
  position: relative;
  padding: 56px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  background:
    linear-gradient(135deg, hsl(239 84% 67% / 0.06), hsl(262 83% 66% / 0.12)),
    #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow-strong);
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 30%, hsl(239 84% 67% / 0.1), transparent 50%),
    radial-gradient(ellipse at 10% 80%, hsl(190 90% 55% / 0.08), transparent 50%);
  pointer-events: none;
}

.cta-copy { position: relative; z-index: 2; }
.cta-copy h2 {
  font-family: "Oswald", "Poppins", sans-serif;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 16px 0 10px;
}
.cta-copy p { font-size: 16px; color: var(--ink-soft); margin: 0 0 24px; }

.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }

.cta-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}
.cta-meta > div { display: flex; flex-direction: column; gap: 2px; align-items: center; }
.cta-meta strong {
  font-family: "Oswald", sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.cta-meta span { font-size: 12px; color: var(--ink-muted); font-weight: 500; }

.cta-vis { position: relative; z-index: 2; height: 320px; }
.cta-window {
  position: relative;
  width: 100%;
  height: 100%;
  transform: perspective(900px) rotateY(-12deg) rotateX(8deg) rotateZ(-1deg);
}
.cta-body {
  height: calc(100% - 45px);
  padding: 20px;
}
.cta-canvas {
  position: relative;
  height: 100%;
  background: linear-gradient(135deg, hsl(230 40% 99%), hsl(230 40% 96%));
  border: 1px dashed var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.cta-shape {
  position: absolute;
  border-radius: 12px;
  box-shadow: var(--shadow-strong);
}
.cta-shape-1 {
  left: 18%; top: 16%;
  width: 44%; height: 26%;
  background: linear-gradient(135deg, hsl(239 84% 67%), hsl(262 83% 66%));
  transform: rotate(-6deg);
}
.cta-shape-2 {
  right: 12%; top: 40%;
  width: 48%; height: 30%;
  background: linear-gradient(135deg, hsl(190 90% 55%), hsl(160 70% 50%));
  transform: rotate(4deg);
  opacity: 0.95;
}
.cta-shape-3 {
  left: 28%; bottom: 12%;
  width: 56%; height: 22%;
  background: linear-gradient(135deg, hsl(38 100% 55%), hsl(22 95% 58%));
  transform: rotate(-2deg);
  opacity: 0.95;
}

/* ============ Footer ============ */
.footer {
  padding: 40px 0 48px;
  margin-top: 40px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: 48px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-desc { color: var(--ink-soft); font-size: 14px; max-width: 360px; line-height: 1.75; }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 16px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--ink-soft); font-size: 14px; text-decoration: none; transition: color 0.2s; }
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-muted);
  flex-wrap: wrap;
  gap: 10px;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-stage { height: 440px; margin-top: 30px; }
  .iso-window-main { width: 340px; }
  .iso-window-side { width: 200px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 20px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .manifesto-card { grid-template-columns: 1fr; padding: 40px 32px; }
  .manifesto-stage { min-height: 260px; }
  .manifesto-window { width: 260px; }
  .principle-grid { grid-template-columns: 1fr; }
  .cta-card { grid-template-columns: 1fr; padding: 40px 32px; }
  .cta-vis { height: 240px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .faq-list { grid-template-columns: 1fr; }
  .hero-meta { grid-template-columns: repeat(2, 1fr); }
  .cta-meta { grid-template-columns: 1fr; }
  .hero-stage { height: 380px; }
  .iso-window-main { width: 280px; }
  .iso-window-side { display: none; }
  .floating-card { min-width: 110px; padding: 10px 12px; }
  .f-card-1 { top: 0; right: -10px; }
  .f-card-2 { bottom: 60px; right: -10px; }
  .logo-wall { justify-content: center; gap: 18px; padding: 16px 20px; }
  .logo-wall-label { border-right: none; padding-right: 0; }
}

/* 进入动画 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}