/* =========================================================
   微空间探索 MICROSPACE — 官网样式
   ========================================================= */

:root {
  --bg: #05070d;
  --bg-soft: #080c16;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-hover: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eef2ff;
  --muted: #8e9ab3;
  --muted-2: #64708a;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --pink: #d946ef;
  --grad: linear-gradient(115deg, #22d3ee 0%, #8b5cf6 55%, #d946ef 100%);
  --grad-soft: linear-gradient(115deg, rgba(34, 211, 238, 0.16), rgba(139, 92, 246, 0.16));
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 24px 70px -20px rgba(0, 0, 0, 0.8);
  --max: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 620px at 12% -8%, rgba(34, 211, 238, 0.14), transparent 65%),
    radial-gradient(820px 560px at 92% 4%, rgba(139, 92, 246, 0.16), transparent 62%),
    radial-gradient(700px 500px at 50% 108%, rgba(217, 70, 239, 0.1), transparent 65%),
    var(--bg);
}

/* 细网格纹理 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 20%, transparent 78%);
}

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

::selection {
  background: rgba(139, 92, 246, 0.4);
  color: #fff;
}

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

.section {
  padding: 118px 0;
  position: relative;
}

.section--tight {
  padding: 84px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 64px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.section-head.center .eyebrow::before {
  background: linear-gradient(90deg, transparent, var(--cyan));
}

.section-head h2 {
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  margin-bottom: 20px;
}

.section-head p {
  color: var(--muted);
  font-size: 1.0625rem;
}

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

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

.site-header.scrolled {
  background: rgba(5, 7, 13, 0.72);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-bottom-color: var(--line);
}

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

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

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name b {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-name span {
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: var(--muted-2);
  font-weight: 600;
}

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

.nav-links a {
  font-size: 14.5px;
  color: var(--muted);
  position: relative;
  transition: color 0.25s;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  transition: all 0.25s var(--ease);
}

.nav-cta:hover {
  border-color: rgba(139, 92, 246, 0.6);
  background: rgba(139, 92, 246, 0.14);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 17px;
  height: 1.5px;
  background: var(--text);
  position: relative;
  transition: 0.3s;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.5px;
  background: var(--text);
  transition: 0.3s;
}

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

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s, border-color 0.25s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 12px 34px -10px rgba(139, 92, 246, 0.7);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 46px -12px rgba(139, 92, 246, 0.85);
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.07);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 11px 22px;
  font-size: 14px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 168px 0 96px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 15px 6px 10px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  font-size: 12.5px;
  color: #c7d0e3;
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.16);
  animation: pulse 2.4s infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.16);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(52, 211, 153, 0.04);
  }
}

.hero h1 {
  font-size: clamp(2.5rem, 5.2vw, 4.35rem);
  letter-spacing: -0.035em;
  margin-bottom: 26px;
}

.hero h1 .line {
  display: block;
}

.hero-sub {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 38px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 54px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 28px;
  max-width: 520px;
}

.hero-stat {
  flex: 1 1 0;
  min-width: 110px;
  padding-right: 18px;
}

.hero-stat + .hero-stat {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.hero-stat b {
  display: block;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero-stat span {
  font-size: 12.5px;
  color: var(--muted-2);
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.orbit {
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.orbit:nth-child(2) {
  inset: 17%;
  border-color: rgba(255, 255, 255, 0.05);
}

.orbit:nth-child(3) {
  inset: 28%;
  border-style: dashed;
  border-color: rgba(139, 92, 246, 0.22);
  animation: spin 46s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hero-glow {
  position: absolute;
  width: 62%;
  height: 62%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.4), transparent 68%);
  filter: blur(38px);
}

.hero-art {
  position: relative;
  width: 88%;
  filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.55));
  animation: floaty 7s ease-in-out infinite;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(-6px);
  }
  50% {
    transform: translateY(8px);
  }
}

.chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: rgba(10, 14, 24, 0.78);
  backdrop-filter: blur(14px);
  font-size: 12px;
  color: #cbd5e1;
  white-space: nowrap;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.8);
}

.chip i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  flex: none;
}

.chip--1 {
  top: 12%;
  left: -4%;
  animation: floaty 6s ease-in-out infinite 0.4s;
}

.chip--2 {
  bottom: 20%;
  right: -2%;
  animation: floaty 7.5s ease-in-out infinite 1.2s;
}

.chip--2 i {
  background: var(--violet);
}

.chip--3 {
  bottom: 3%;
  left: 12%;
  animation: floaty 6.6s ease-in-out infinite 0.8s;
}

.chip--3 i {
  background: var(--pink);
}

/* ---------- 产品 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.45s var(--ease),
    box-shadow 0.45s var(--ease);
}

.product-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.45s var(--ease);
  pointer-events: none;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.9);
}

.product-card:hover::after {
  opacity: 0.75;
}

.product-art {
  position: relative;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: radial-gradient(120% 90% at 50% 10%, rgba(34, 211, 238, 0.1), transparent 62%);
  border-bottom: 1px solid var(--line);
}

.product-art svg {
  width: 76%;
  transition: transform 0.6s var(--ease);
}

.product-card:hover .product-art svg {
  transform: scale(1.06) translateY(-4px);
}

.product-art .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #cbd5e1;
  background: rgba(0, 0, 0, 0.3);
}

.product-body {
  padding: 26px 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-body h3 {
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.product-en {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 14px;
  font-weight: 600;
}

.product-body p {
  color: var(--muted);
  font-size: 14.5px;
  margin-bottom: 20px;
  flex: 1;
}

.spec-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 22px;
}

.spec-mini li {
  font-size: 11.5px;
  padding: 5px 11px;
  border-radius: 100px;
  border: 1px solid var(--line);
  color: #a9b4c9;
  background: rgba(255, 255, 255, 0.025);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  transition: gap 0.25s var(--ease);
}

.card-link svg {
  width: 15px;
  height: 15px;
}

.product-card:hover .card-link {
  gap: 13px;
}

/* ---------- 技术能力 ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.tech-item {
  background: var(--bg-soft);
  padding: 34px 30px 36px;
  transition: background 0.35s var(--ease);
}

.tech-item:hover {
  background: #0b1120;
}

.tech-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  color: var(--cyan);
}

.tech-icon svg {
  width: 20px;
  height: 20px;
}

.tech-item h3 {
  font-size: 1.02rem;
  margin-bottom: 9px;
}

.tech-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- 场景 ---------- */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.scene {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 32px 28px;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
  overflow: hidden;
  transition: border-color 0.35s, transform 0.45s var(--ease);
}

.scene:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.18);
}

.scene .num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted-2);
  margin-bottom: 26px;
  display: block;
}

.scene h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.scene p {
  font-size: 14px;
  color: var(--muted);
}

.scene-ico {
  position: absolute;
  right: -14px;
  bottom: -18px;
  width: 108px;
  height: 108px;
  color: rgba(139, 92, 246, 0.14);
}

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 72px;
  align-items: start;
}

.about-copy h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.75rem);
  margin-bottom: 24px;
}

.about-copy p {
  color: var(--muted);
  margin-bottom: 18px;
}

.about-facts {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact {
  background: var(--bg-soft);
  padding: 24px 26px;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  align-items: baseline;
}

.fact b {
  font-size: 14px;
  color: var(--muted-2);
  font-weight: 600;
}

.fact p {
  margin: 0;
  font-size: 14.5px;
  color: #c8d2e6;
}

.value-list {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.value-list li {
  display: flex;
  gap: 13px;
  font-size: 14.5px;
  color: #c3cde2;
}

.value-list li::before {
  content: "";
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--grad-soft);
  border: 1px solid rgba(139, 92, 246, 0.45);
  background-image: radial-gradient(circle, var(--cyan) 0 2px, transparent 2.5px);
}

/* ---------- 联系 ---------- */
.contact-wrap {
  border-radius: 26px;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.07), rgba(139, 92, 246, 0.09) 50%, rgba(217, 70, 239, 0.06));
  padding: 58px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  position: relative;
  overflow: hidden;
}

.contact-wrap::before {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  right: -180px;
  top: -220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.3), transparent 66%);
  filter: blur(20px);
  pointer-events: none;
}

.contact-wrap h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 18px;
}

.contact-wrap > div > p {
  color: var(--muted);
  margin-bottom: 34px;
  max-width: 400px;
}

.contact-list {
  display: grid;
  gap: 22px;
}

.contact-list li {
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.contact-list .ico {
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 9px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--cyan);
}

.contact-list .ico svg {
  width: 16px;
  height: 16px;
}

.contact-list b {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 3px;
  font-weight: 700;
}

.contact-list span {
  font-size: 14.5px;
  color: #d3dbec;
}

.contact-form {
  display: grid;
  gap: 14px;
  align-content: start;
  position: relative;
  z-index: 1;
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.field input,
.field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.field textarea {
  resize: vertical;
  min-height: 104px;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #55617a;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(139, 92, 246, 0.6);
  background: rgba(0, 0, 0, 0.42);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
}

.form-note {
  font-size: 12px;
  color: var(--muted-2);
  margin-top: 2px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 66px 0 34px;
  margin-top: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 44px;
  padding-bottom: 48px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 13.5px;
  max-width: 260px;
  margin-top: 18px;
  line-height: 1.75;
}

.footer-col h4 {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 18px;
  font-weight: 700;
}

.footer-col ul {
  display: grid;
  gap: 11px;
}

.footer-col a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--muted-2);
}

.footer-bottom a {
  color: var(--muted-2);
}

.footer-bottom a:hover {
  color: var(--text);
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--d, 0ms);
}

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

/* ---------- 产品详情页 ---------- */
.pd-hero {
  padding: 150px 0 80px;
  position: relative;
  overflow: hidden;
}

.pd-hero .back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 34px;
  transition: color 0.2s, gap 0.25s;
}

.pd-hero .back:hover {
  color: var(--text);
  gap: 11px;
}

.pd-grid {
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  gap: 60px;
  align-items: center;
}

.pd-hero h1 {
  font-size: clamp(2.2rem, 4.4vw, 3.6rem);
  margin-bottom: 20px;
}

.pd-hero .lead {
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 480px;
  margin-bottom: 32px;
}

.pd-art {
  aspect-ratio: 1 / 1;
  border-radius: 26px;
  border: 1px solid var(--line);
  background: radial-gradient(110% 80% at 50% 8%, rgba(34, 211, 238, 0.13), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.008));
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

.pd-art svg {
  width: 74%;
  filter: drop-shadow(0 26px 44px rgba(0, 0, 0, 0.5));
  animation: floaty 8s ease-in-out infinite;
}

.pd-art .tag {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #cbd5e1;
  background: rgba(0, 0, 0, 0.32);
}

.pd-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.pd-highlights > div {
  background: var(--bg-soft);
  padding: 30px 26px;
}

.pd-highlights h4 {
  font-size: 14px;
  margin-bottom: 8px;
  color: #dde5f5;
}

.pd-highlights p {
  font-size: 13.5px;
  color: var(--muted);
}

.pd-highlights .k {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 10px;
  display: block;
  line-height: 1.2;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14.5px;
}

.spec-table tr {
  border-bottom: 1px solid var(--line);
}

.spec-table tr:last-child {
  border-bottom: 0;
}

.spec-table tr:nth-child(odd) {
  background: rgba(255, 255, 255, 0.018);
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 16px 22px;
  vertical-align: top;
}

.spec-table th {
  width: 190px;
  color: var(--muted-2);
  font-weight: 600;
  font-size: 13.5px;
}

.spec-table td {
  color: #d5dded;
}

.pd-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

.feature-list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-list li {
  background: var(--bg-soft);
  padding: 22px 24px;
  display: flex;
  gap: 15px;
}

.feature-list .fi {
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 8px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.1);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
}

.feature-list b {
  display: block;
  font-size: 14.5px;
  margin-bottom: 3px;
  font-weight: 600;
}

.feature-list span {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
}

.cta-band {
  border-radius: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.08), rgba(139, 92, 246, 0.12));
  padding: 52px 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
}

.cta-band h3 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 8px;
}

.cta-band p {
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .product-grid,
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about-grid,
  .pd-grid {
    gap: 48px;
  }

  .contact-wrap {
    padding: 44px;
    gap: 44px;
  }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    inset: 72px 0 auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px 24px 24px;
    background: rgba(5, 7, 13, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }

  .nav-links.open {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .nav-links a {
    width: 100%;
    padding: 15px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 130px 0 70px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-visual {
    order: -1;
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
  }

  .hero-sub,
  .hero-stats {
    max-width: 100%;
  }

  .section {
    padding: 88px 0;
  }

  .about-grid,
  .contact-wrap,
  .pd-grid,
  .pd-split {
    grid-template-columns: 1fr;
  }

  .pd-art {
    max-width: 460px;
    margin: 0 auto;
    width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

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

  .pd-highlights {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 18px;
  }

  .product-grid,
  .scene-grid,
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .section-head {
    margin-bottom: 44px;
  }

  .hero h1 {
    font-size: clamp(2.1rem, 8.4vw, 2.7rem);
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .hero-stat b {
    font-size: 1.25rem;
  }

  .hero-stat span {
    font-size: 11.5px;
  }

  .chip {
    font-size: 10.5px;
    padding: 6px 11px;
  }

  .chip--1 {
    left: -2%;
  }

  .chip--2 {
    right: -1%;
  }

  .contact-wrap {
    padding: 32px 22px;
    border-radius: 20px;
  }

  .cta-band {
    padding: 34px 24px;
  }

  .cta-band .btn {
    width: 100%;
  }

  .product-body {
    padding: 22px 20px 24px;
  }

  .fact {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .spec-table th,
  .spec-table td {
    padding: 13px 16px;
  }

  .spec-table th {
    width: 118px;
  }

  .pd-hero {
    padding: 118px 0 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

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