/* =========================================================
   基础变量与页面骨架
   ========================================================= */
:root {
  --bg: #0a0e17;
  --bg-deep: #070a11;
  --surface: rgba(15, 23, 38, 0.64);
  --surface-strong: rgba(18, 28, 47, 0.82);
  --text: #f3f7fb;
  --text-soft: #c7d2e1;
  --muted: #8593a8;
  --cyan: #22d3ee;
  --indigo: #6366f1;
  --orange: #f59e0b;
  --line: rgba(148, 163, 184, 0.14);
  --line-bright: rgba(255, 255, 255, 0.2);
  --nav-height: 78px;
  --max-width: 1240px;
  --card-radius: 16px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-color: rgba(103, 232, 249, 0.45) #080c13;
  scrollbar-width: thin;
}

body {
  min-width: 300px;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 5%, rgba(34, 211, 238, 0.07), transparent 24rem),
    radial-gradient(circle at 88% 28%, rgba(99, 102, 241, 0.08), transparent 30rem),
    var(--bg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body::selection {
  color: #061018;
  background: rgba(103, 232, 249, 0.88);
}

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

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

img,
svg,
canvas {
  display: block;
}

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

h1,
h2,
h3,
p {
  margin: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  color: #071016;
  background: var(--cyan);
  border-radius: 9px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

::-webkit-scrollbar {
  width: 10px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #080c13;
}

::-webkit-scrollbar-thumb {
  min-height: 48px;
  background: linear-gradient(180deg, rgba(103, 232, 249, 0.5), rgba(99, 102, 241, 0.48));
  border: 2px solid #080c13;
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(103, 232, 249, 0.72), rgba(99, 102, 241, 0.7));
}

:focus-visible {
  outline: 2px solid rgba(103, 232, 249, 0.92);
  outline-offset: 4px;
}

/* 固定渐变光晕与细网格构成整页氛围 */
.page-glow {
  position: fixed;
  z-index: -3;
  width: 44vw;
  height: 44vw;
  border-radius: 50%;
  opacity: 0.32;
  filter: blur(16px);
  pointer-events: none;
}

.page-glow--cyan {
  top: -20vw;
  left: -15vw;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.2) 0, rgba(34, 211, 238, 0.05) 40%, transparent 70%);
  animation: ambient-breathe 11s ease-in-out infinite alternate;
}

.page-glow--indigo {
  top: 32vh;
  right: -22vw;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22) 0, rgba(99, 102, 241, 0.05) 42%, transparent 72%);
  animation: ambient-breathe 14s ease-in-out -4s infinite alternate-reverse;
}

.grid-overlay {
  position: fixed;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 72% at 50% 30%, #000 10%, transparent 82%);
  pointer-events: none;
}

@keyframes ambient-breathe {
  from {
    opacity: 0.24;
    transform: scale(0.92) translate3d(0, 0, 0);
  }
  to {
    opacity: 0.48;
    transform: scale(1.08) translate3d(2vw, 1vh, 0);
  }
}

/* =========================================================
   固定顶部导航
   ========================================================= */
.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  height: var(--nav-height);
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.35s ease,
    border-color 0.35s ease,
    box-shadow 0.35s ease;
}

.site-header.is-scrolled {
  background: rgba(8, 12, 19, 0.78);
  border-bottom-color: rgba(148, 163, 184, 0.1);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.nav-shell {
  display: flex;
  align-items: center;
  width: min(calc(100% - 48px), 1360px);
  height: 100%;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  min-width: 148px;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(103, 232, 249, 0.26);
  border-radius: 10px;
  background:
    linear-gradient(145deg, rgba(34, 211, 238, 0.14), rgba(99, 102, 241, 0.12)),
    rgba(255, 255, 255, 0.02);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 0 22px rgba(34, 211, 238, 0.08);
}

.brand-mark svg {
  width: 24px;
  height: 24px;
  overflow: visible;
  fill: none;
  stroke: rgba(173, 245, 255, 0.94);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.2;
}

.brand-copy {
  display: flex;
  align-items: baseline;
  gap: 6px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-copy strong {
  font-size: 15px;
  font-weight: 650;
}

.brand-copy small {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.site-nav {
  min-width: 0;
  margin: 0 auto;
}

.nav-scroll {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  height: var(--nav-height);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-scroll::-webkit-scrollbar {
  display: none;
}

.nav-link {
  position: relative;
  flex: 0 0 auto;
  padding: 26px 14px 25px;
  color: #8997aa;
  font-size: 13px;
  letter-spacing: 0.025em;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #dce8f4;
}

.nav-link.is-active {
  color: #f5fbff;
}

.nav-indicator {
  --indicator-x: 0px;
  --indicator-width: 0px;
  position: absolute;
  bottom: 13px;
  left: 0;
  width: var(--indicator-width);
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--indigo));
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.55);
  opacity: 0;
  transform: translateX(var(--indicator-x));
  transition:
    transform 0.42s var(--ease-out),
    width 0.42s var(--ease-out),
    opacity 0.2s ease;
  pointer-events: none;
}

.nav-indicator.is-ready {
  opacity: 1;
}

.nav-status {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  min-width: 142px;
  justify-content: flex-end;
  color: #718096;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.nav-status i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.08), 0 0 12px rgba(52, 211, 153, 0.45);
}

/* =========================================================
   首屏
   ========================================================= */
.hero {
  position: relative;
  display: flex;
  min-height: max(760px, 100svh);
  padding: calc(var(--nav-height) + 42px) 24px 104px;
  overflow: hidden;
  align-items: center;
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 18%;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
  content: "";
}

.particle-canvas {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.68;
  pointer-events: none;
}

.hero-aura {
  position: absolute;
  z-index: 0;
  top: 20%;
  left: 54%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 44% 44%, rgba(34, 211, 238, 0.12), transparent 34%),
    radial-gradient(circle at 58% 55%, rgba(99, 102, 241, 0.17), transparent 52%);
  filter: blur(24px);
  transform: translate(-50%, -50%);
  animation: hero-aura-drift 10s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes hero-aura-drift {
  from {
    opacity: 0.65;
    transform: translate(-52%, -50%) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translate(-47%, -48%) scale(1.06);
  }
}

.hero-shell {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(350px, 0.88fr);
  gap: clamp(40px, 7vw, 110px);
  width: min(100%, var(--max-width));
  margin: 0 auto;
  align-items: center;
}

.hero-copy {
  max-width: 720px;
}

.hero-eyebrow,
.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #91a0b5;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.hero-eyebrow {
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(12px);
  animation: hero-rise 0.85s 0.08s var(--ease-out) forwards;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 211, 238, 0.08), 0 0 18px rgba(34, 211, 238, 0.6);
}

.eyebrow-line {
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, rgba(34, 211, 238, 0.8), rgba(99, 102, 241, 0.3));
}

.hero-title {
  max-width: 760px;
  font-size: clamp(46px, 6.2vw, 86px);
  font-weight: 660;
  letter-spacing: -0.065em;
  line-height: 1.12;
}

.title-line {
  display: block;
  overflow: hidden;
  padding: 0.06em 0.1em 0.08em 0;
}

.title-line > span {
  display: inline-block;
  opacity: 0;
  transform: translateY(112%);
  animation: title-reveal 1s 0.18s var(--ease-out) forwards;
}

.title-line:nth-child(2) > span {
  animation-delay: 0.34s;
}

.title-line--accent > span {
  color: transparent;
  background: linear-gradient(102deg, #f3fdff 4%, #7cebf8 45%, #9ca3ff 96%);
  background-clip: text;
  -webkit-background-clip: text;
  text-shadow: 0 0 50px rgba(34, 211, 238, 0.13);
}

@keyframes title-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-summary {
  max-width: 640px;
  margin-top: 28px;
  color: #a9b6c8;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  opacity: 0;
  transform: translateY(16px);
  animation: hero-rise 0.9s 0.52s var(--ease-out) forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
  opacity: 0;
  transform: translateY(16px);
  animation: hero-rise 0.9s 0.68s var(--ease-out) forwards;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  transition:
    transform 0.25s var(--ease-out),
    background-color 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

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

.button--primary {
  color: #061118;
  background: linear-gradient(100deg, #67e8f9, #a5b4fc);
  box-shadow: 0 10px 28px rgba(34, 211, 238, 0.12);
}

.button--primary:hover {
  box-shadow: 0 14px 32px rgba(34, 211, 238, 0.2);
}

.button--primary span {
  font-size: 17px;
}

.button--secondary {
  color: #cbd7e5;
  border-color: rgba(148, 163, 184, 0.2);
  background: rgba(255, 255, 255, 0.025);
}

.button--secondary:hover {
  border-color: rgba(148, 163, 184, 0.36);
  background: rgba(255, 255, 255, 0.05);
}

.capability-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 610px;
  margin-top: 54px;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(16px);
  animation: hero-rise 1s 0.84s var(--ease-out) forwards;
}

.capability-strip li {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 8px;
  padding: 16px 14px 0 0;
}

.capability-strip li:not(:first-child)::before {
  position: absolute;
  top: 16px;
  bottom: 0;
  left: -10px;
  width: 1px;
  background: var(--line);
  content: "";
}

.capability-strip span {
  grid-row: span 2;
  color: rgba(103, 232, 249, 0.52);
  font-size: 9px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.capability-strip strong {
  color: #d9e7f4;
  font-size: 13px;
  font-weight: 600;
}

.capability-strip small {
  color: #64748b;
  font-size: 10px;
}

/* 首屏右侧的场景示意 */
.hero-visual {
  position: relative;
  display: grid;
  min-height: 470px;
  place-items: center;
  opacity: 0;
  transform: translateY(18px) scale(0.97);
  animation: visual-enter 1.15s 0.5s var(--ease-out) forwards;
}

@keyframes visual-enter {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.orbit {
  position: absolute;
  border: 1px solid rgba(103, 232, 249, 0.09);
  border-radius: 50%;
}

.orbit::before {
  position: absolute;
  inset: 8%;
  border: 1px dashed rgba(148, 163, 184, 0.08);
  border-radius: inherit;
  content: "";
}

.orbit--outer {
  width: 460px;
  height: 460px;
  animation: orbit-spin 38s linear infinite;
}

.orbit--inner {
  width: 350px;
  height: 350px;
  border-color: rgba(99, 102, 241, 0.1);
  animation: orbit-spin 28s linear reverse infinite;
}

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

.orbit-node {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #a5f3fc;
  box-shadow: 0 0 0 5px rgba(34, 211, 238, 0.06), 0 0 16px rgba(34, 211, 238, 0.6);
}

.orbit-node--one {
  top: 12%;
  left: 20%;
}

.orbit-node--two {
  right: 8%;
  bottom: 33%;
  background: #a5b4fc;
  box-shadow: 0 0 0 5px rgba(99, 102, 241, 0.07), 0 0 16px rgba(99, 102, 241, 0.55);
}

.orbit-node--three {
  bottom: 9%;
  left: 38%;
  width: 4px;
  height: 4px;
}

.signal-card {
  position: relative;
  z-index: 2;
  width: min(100%, 380px);
  padding: 22px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.17);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(139, 199, 255, 0.08), transparent 38%),
    rgba(11, 18, 31, 0.76);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 34px 80px rgba(0, 0, 0, 0.34),
    0 0 60px rgba(34, 211, 238, 0.04);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  transform: rotate(1.2deg);
}

.signal-card::before {
  position: absolute;
  top: 0;
  right: 14%;
  left: 14%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(103, 232, 249, 0.75), transparent);
  content: "";
}

.signal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #637189;
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.12em;
}

.signal-head span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: rgba(103, 232, 249, 0.72);
}

.signal-head i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.65);
}

.signal-query {
  margin-top: 24px;
  color: #eef7fc;
  font-size: 16px;
  line-height: 1.65;
}

.signal-route {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 18px;
}

.signal-route span {
  padding: 4px 8px;
  color: #93a5ba;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.025);
  font-size: 9px;
}

.signal-route i {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(103, 232, 249, 0.12), rgba(99, 102, 241, 0.45));
}

.signal-result {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid rgba(103, 232, 249, 0.12);
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.07), rgba(99, 102, 241, 0.06));
}

.signal-result small {
  display: block;
  margin-bottom: 8px;
  color: rgba(103, 232, 249, 0.55);
  font-size: 8px;
  letter-spacing: 0.14em;
}

.signal-result strong {
  display: block;
  color: #d9eff8;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.55;
}

.signal-result p {
  margin-top: 5px;
  color: #74849a;
  font-size: 9px;
}

.signal-bars {
  display: flex;
  height: 44px;
  align-items: flex-end;
  gap: 7px;
  margin-top: 15px;
}

.signal-bars span {
  flex: 1;
  height: var(--bar);
  min-height: 5px;
  border-radius: 4px 4px 1px 1px;
  background: linear-gradient(to top, rgba(99, 102, 241, 0.42), rgba(103, 232, 249, 0.22));
  transform-origin: bottom;
  animation: bar-breathe 3.6s ease-in-out infinite alternate;
}

.signal-bars span:nth-child(2) {
  animation-delay: -0.5s;
}

.signal-bars span:nth-child(3) {
  animation-delay: -1.2s;
}

.signal-bars span:nth-child(4) {
  animation-delay: -2.1s;
}

.signal-bars span:nth-child(5) {
  animation-delay: -2.8s;
}

@keyframes bar-breathe {
  to {
    opacity: 0.55;
    transform: scaleY(0.72);
  }
}

.floating-label {
  position: absolute;
  z-index: 3;
  padding: 6px 10px;
  color: #7b8da2;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 999px;
  background: rgba(8, 13, 22, 0.64);
  font-size: 9px;
  letter-spacing: 0.08em;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.floating-label--top {
  top: 16%;
  right: 7%;
}

.floating-label--bottom {
  bottom: 16%;
  left: 7%;
}

.scroll-cue {
  position: absolute;
  z-index: 3;
  bottom: 34px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #516075;
  font-size: 10px;
  letter-spacing: 0.12em;
  transform: translateX(-50%);
  transition: color 0.25s ease;
}

.scroll-cue:hover {
  color: #9aabbe;
}

.scroll-cue i {
  position: relative;
  width: 17px;
  height: 28px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 999px;
}

.scroll-cue i::after {
  position: absolute;
  top: 6px;
  left: 50%;
  width: 3px;
  height: 5px;
  border-radius: 3px;
  background: rgba(103, 232, 249, 0.72);
  content: "";
  transform: translateX(-50%);
  animation: scroll-dot 1.8s ease-in-out infinite;
}

@keyframes scroll-dot {
  0%,
  100% {
    opacity: 0.3;
    transform: translate(-50%, 0);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, 9px);
  }
}

/* =========================================================
   内容板块、主视觉与横向卡片
   ========================================================= */
.content-section {
  --accent: #67e8f9;
  --accent-rgb: 103, 232, 249;
  position: relative;
  padding: clamp(82px, 8vw, 112px) 24px clamp(66px, 6vw, 84px);
  scroll-margin-top: calc(var(--nav-height) + 22px);
}

.content-section::before {
  position: absolute;
  top: 0;
  right: 5%;
  left: 5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.16), transparent);
  content: "";
}

#capability {
  --accent: #67e8f9;
  --accent-rgb: 103, 232, 249;
}

#operations {
  --accent: #a5b4fc;
  --accent-rgb: 165, 180, 252;
}

#marketing {
  --accent: #f59e0b;
  --accent-rgb: 245, 158, 11;
}

#experience {
  --accent: #67e8f9;
  --accent-rgb: 103, 232, 249;
}

.section-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.section-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 410px);
  gap: clamp(34px, 6vw, 82px);
  min-height: 310px;
  padding: 6px 0 clamp(42px, 5vw, 62px);
  align-items: center;
}

.section-hero::before {
  position: absolute;
  z-index: -1;
  top: -8%;
  right: 0;
  width: min(38vw, 430px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.075), transparent 68%);
  filter: blur(12px);
  content: "";
  pointer-events: none;
}

.section-hero-copy {
  position: relative;
  z-index: 1;
}

.section-kicker {
  color: rgba(var(--accent-rgb), 0.7);
}

.section-kicker > span {
  width: 20px;
  height: 1px;
  background: rgba(var(--accent-rgb), 0.8);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.35);
}

.section-hero h2,
.about-intro h2 {
  max-width: 760px;
  margin-top: 16px;
  font-size: clamp(36px, 4.6vw, 58px);
  font-weight: 640;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.section-lead {
  max-width: 620px;
  margin-top: 18px;
  color: #91a0b4;
  font-size: 15px;
  line-height: 1.9;
}

.section-rail {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: max-content;
  margin-top: 28px;
  color: rgba(148, 163, 184, 0.4);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.section-rail i {
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.52), transparent);
}

.section-art {
  position: relative;
  width: min(100%, 430px);
  margin: 0;
  justify-self: end;
  border-radius: 24px;
  background:
    radial-gradient(circle at 55% 46%, rgba(var(--accent-rgb), 0.07), transparent 48%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent 48%);
}

.section-art::before,
.section-art::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.section-art::before {
  inset: 11% 8%;
  border: 1px solid rgba(148, 163, 184, 0.08);
  border-radius: 50%;
  transform: rotate(-8deg);
}

.section-art::after {
  top: 12%;
  right: 5%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 7px rgba(var(--accent-rgb), 0.055), 0 0 20px rgba(var(--accent-rgb), 0.5);
}

.section-art-svg {
  width: 100%;
  height: auto;
  overflow: visible;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.07));
}

.art-pulse {
  transform-box: fill-box;
  transform-origin: center;
  animation: art-pulse 3.8s ease-out infinite;
}

.art-flow {
  stroke-dasharray: 3 10;
  animation: art-flow 6s linear infinite;
}

.art-flow--slow {
  animation-duration: 9s;
}

.art-float {
  transform-box: fill-box;
  transform-origin: center;
  animation: art-float 5.4s ease-in-out infinite;
}

.art-float--delay {
  animation-delay: -1.8s;
}

.art-float--soft {
  animation-delay: -3.2s;
  animation-duration: 7s;
}

.art-float--delay-soft {
  animation-delay: -4.4s;
  animation-duration: 6.2s;
}

.art-draw {
  stroke-dasharray: 520;
  stroke-dashoffset: 520;
  animation: art-draw 2.4s 0.15s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.art-wave {
  transform-box: fill-box;
  transform-origin: center;
  animation: art-wave 4.8s ease-out infinite;
}

.art-wave--delay {
  animation-delay: -1.6s;
}

.art-wave--soft {
  animation-delay: -3.2s;
}

@keyframes art-pulse {
  0%,
  18% {
    opacity: 0.65;
    transform: scale(0.7);
  }
  76%,
  100% {
    opacity: 0;
    transform: scale(1.7);
  }
}

@keyframes art-flow {
  to {
    stroke-dashoffset: -78;
  }
}

@keyframes art-float {
  0%,
  100% {
    opacity: 0.42;
    transform: translate3d(0, 0, 0);
  }
  50% {
    opacity: 0.92;
    transform: translate3d(4px, -7px, 0);
  }
}

@keyframes art-draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes art-wave {
  0% {
    opacity: 0;
    transform: scale(0.78);
  }
  38% {
    opacity: 0.7;
  }
  100% {
    opacity: 0;
    transform: scale(1.12);
  }
}

/* 横向滑轨：箭头浮在两端，触屏保留原生惯性滚动 */
.card-carousel {
  position: relative;
}

.carousel-stage {
  position: relative;
}

.card-viewport {
  margin-top: -8px;
  padding: 8px 2px 16px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-padding-inline: 2px;
  scroll-snap-type: x mandatory;
  cursor: grab;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.card-viewport::-webkit-scrollbar {
  display: none;
}

.card-viewport:focus-visible {
  border-radius: 18px;
  outline-offset: 2px;
}

.card-track {
  display: flex;
  width: max-content;
  gap: 18px;
  align-items: stretch;
}

.carousel-arrow {
  position: absolute;
  z-index: 4;
  top: calc(50% - 28px);
  display: grid;
  width: 42px;
  height: 54px;
  padding: 0;
  place-items: center;
  color: rgba(220, 238, 248, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  background: rgba(9, 15, 26, 0.82);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  cursor: pointer;
  transition:
    color 0.24s ease,
    border-color 0.24s ease,
    background-color 0.24s ease,
    opacity 0.24s ease,
    transform 0.24s var(--ease-out);
}

.carousel-arrow--prev {
  left: -18px;
}

.carousel-arrow--next {
  right: -18px;
}

.carousel-arrow:hover:not(:disabled) {
  color: #effeff;
  border-color: rgba(34, 211, 238, 0.42);
  background: rgba(12, 23, 38, 0.94);
  transform: scale(1.04);
}

.carousel-arrow:disabled {
  opacity: 0.22;
  cursor: default;
}

.carousel-arrow svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.35;
}

.carousel-footer {
  display: grid;
  grid-template-columns: auto minmax(70px, 1fr) auto;
  gap: 18px;
  margin-top: 8px;
  align-items: center;
}

.carousel-hint,
.carousel-count {
  color: #59687c;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.carousel-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.carousel-hint span {
  width: 17px;
  height: 1px;
  background: rgba(var(--accent-rgb), 0.5);
}

.carousel-progress {
  position: relative;
  height: 2px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
}

.carousel-progress span {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(34, 211, 238, 0.9), rgba(99, 102, 241, 0.9));
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.28);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease-out);
}

.card-carousel.is-dragging,
.card-carousel.is-dragging .card-viewport,
.card-carousel.is-dragging .scenario-card {
  cursor: grabbing;
  scroll-snap-type: none;
  -webkit-user-select: none;
  user-select: none;
}

.card-carousel.is-dragging .scenario-card {
  pointer-events: none;
}

.card-carousel.is-wheel-scrolling .card-viewport {
  scroll-behavior: auto;
  scroll-snap-type: none;
}

.card-carousel.is-dragging .card-viewport {
  scroll-behavior: auto;
}

.scenario-card {
  position: relative;
  display: flex;
  flex: 0 0 340px;
  width: 340px;
  height: 350px;
  margin: 0;
  padding: 20px;
  overflow: hidden;
  flex-direction: column;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: var(--card-radius);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.045), transparent 42%),
    var(--surface);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.045),
    0 16px 40px rgba(0, 0, 0, 0.12);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  scroll-snap-align: start;
  transition:
    transform 0.32s var(--ease-out),
    border-color 0.32s ease,
    box-shadow 0.32s ease,
    background-color 0.32s ease;
}

.scenario-card::before {
  position: absolute;
  top: 0;
  right: 18px;
  left: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.28), transparent);
  opacity: 0.56;
  content: "";
  transition: opacity 0.3s ease;
}

.scenario-card::after {
  position: absolute;
  top: -80px;
  right: -80px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.1), transparent 68%);
  opacity: 0;
  content: "";
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.scenario-card:hover {
  border-color: rgba(var(--accent-rgb), 0.38);
  background-color: rgba(19, 30, 48, 0.8);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    0 24px 56px rgba(0, 0, 0, 0.28),
    0 0 32px rgba(var(--accent-rgb), 0.06);
  transform: translateY(-4px);
}

.scenario-card:hover::before,
.scenario-card:hover::after {
  opacity: 1;
}

.card-meta {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  color: #5e6e84;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.card-meta span:last-child {
  padding: 3px 8px;
  color: rgba(var(--accent-rgb), 0.78);
  border: 1px solid rgba(var(--accent-rgb), 0.14);
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.035);
  letter-spacing: 0.06em;
}

.scenario-card h3 {
  position: relative;
  z-index: 1;
  display: -webkit-box;
  overflow: hidden;
  color: #e7eff8;
  font-size: 17px;
  font-weight: 610;
  letter-spacing: -0.025em;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.scenario-card p {
  position: relative;
  z-index: 1;
  display: -webkit-box;
  margin-top: 11px;
  overflow: hidden;
  color: #8492a6;
  font-size: 13px;
  line-height: 1.7;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.card-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 16px;
}

.card-tags li {
  padding: 3px 7px;
  color: #6f8095;
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.018);
  font-size: 11px;
  letter-spacing: 0.035em;
}

/* JS 可用时才启用滚动入场，保证脚本失效仍能看到内容 */
.js .reveal,
.js .reveal-card {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.72s var(--ease-out) var(--reveal-delay, 0ms),
    transform 0.72s var(--ease-out) var(--reveal-delay, 0ms);
}

.js .reveal.is-visible,
.js .reveal-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   关于与页脚
   ========================================================= */
.about-section {
  position: relative;
  padding: 72px 24px 0;
  scroll-margin-top: calc(var(--nav-height) + 22px);
}

.about-section::before {
  position: absolute;
  top: 0;
  right: 8%;
  left: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(165, 180, 252, 0.2), transparent);
  content: "";
}

.about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(42px, 7vw, 100px);
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: clamp(42px, 6vw, 76px);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 24px;
  background:
    radial-gradient(circle at 6% 0%, rgba(34, 211, 238, 0.08), transparent 17rem),
    radial-gradient(circle at 100% 100%, rgba(99, 102, 241, 0.1), transparent 21rem),
    rgba(13, 20, 34, 0.68);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 32px 90px rgba(0, 0, 0, 0.22);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.about-shell::before {
  position: absolute;
  top: 0;
  left: 28%;
  width: 44%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(103, 232, 249, 0.62), transparent);
  content: "";
}

.about-intro h2 {
  margin-top: 18px;
  font-size: clamp(27px, 3vw, 39px);
  line-height: 1.45;
}

.about-intro > p:last-child {
  margin-top: 22px;
  color: #8190a4;
  font-size: 14px;
  line-height: 1.95;
}

.principle-list {
  display: grid;
  gap: 2px;
  align-content: center;
}

.principle-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.principle-list li:first-child {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.principle-list > li > span {
  padding-top: 2px;
  color: rgba(103, 232, 249, 0.5);
  font-size: 9px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.principle-list strong {
  color: #dbe6f1;
  font-size: 14px;
  font-weight: 600;
}

.principle-list p {
  margin-top: 4px;
  color: #6e7d91;
  font-size: 12px;
  line-height: 1.7;
}

.site-footer {
  display: flex;
  width: min(calc(100% - 0px), var(--max-width));
  margin: 0 auto;
  padding: 30px 0 38px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #4f5d70;
  font-size: 10px;
  letter-spacing: 0.04em;
}

.site-footer p span {
  color: #738298;
}

.site-footer a {
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: #a9b8ca;
}

/* 页脚右侧：备案号 + 回到顶部 */
.footer-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.icp-link {
  color: #4f5d70;
  text-decoration: none;
  transition: color 0.2s ease;
}

.icp-link:hover {
  color: #7dd3fc;
}

/* =========================================================
   响应式布局
   ========================================================= */
@media (max-width: 1199px) {
  .nav-shell {
    width: min(calc(100% - 32px), 1000px);
  }

  .brand {
    min-width: auto;
  }

  .brand-copy small,
  .nav-status {
    display: none;
  }

  .site-nav {
    margin-left: clamp(20px, 4vw, 52px);
  }

  .nav-link {
    padding-right: 11px;
    padding-left: 11px;
  }

  .hero-shell {
    grid-template-columns: minmax(0, 1.12fr) minmax(310px, 0.88fr);
    gap: 34px;
  }

  .hero-visual {
    min-height: 430px;
  }

  .orbit--outer {
    width: 400px;
    height: 400px;
  }

  .orbit--inner {
    width: 310px;
    height: 310px;
  }

  .card-track {
    gap: 16px;
  }
}

@media (max-width: 900px) {
  :root {
    --nav-height: 72px;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 72px);
    padding-bottom: 112px;
  }

  .hero-shell {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 720px;
  }

  .hero-title {
    font-size: clamp(47px, 8.4vw, 70px);
  }

  .hero-visual {
    min-height: 390px;
    margin-top: 6px;
  }

  .orbit--outer {
    width: 390px;
    height: 390px;
  }

  .orbit--inner {
    width: 300px;
    height: 300px;
  }

  .section-hero {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
    gap: 28px;
    min-height: 280px;
    padding-bottom: 38px;
  }

  .section-hero h2 {
    font-size: clamp(34px, 5.4vw, 44px);
  }

  .section-art {
    max-width: 360px;
  }

  .section-rail {
    display: none;
  }

  .about-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  :root {
    --nav-height: 68px;
    --card-radius: 15px;
  }

  .nav-shell {
    width: 100%;
    padding-left: 16px;
  }

  .brand {
    gap: 8px;
    margin-right: 12px;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
    border-radius: 9px;
  }

  .brand-copy strong {
    font-size: 13px;
  }

  .site-nav {
    margin-left: 0;
  }

  .nav-scroll {
    gap: 0;
    padding-right: 20px;
  }

  .nav-link {
    padding: 24px 10px 23px;
    font-size: 12px;
  }

  .nav-indicator {
    bottom: 10px;
  }

  .hero {
    padding: calc(var(--nav-height) + 54px) 18px 90px;
  }

  .particle-canvas {
    display: none;
  }

  .hero-aura {
    top: 46%;
    left: 60%;
    width: 430px;
    height: 430px;
  }

  .hero-eyebrow {
    margin-bottom: 22px;
    font-size: 9px;
    letter-spacing: 0.12em;
  }

  .hero-title {
    font-size: clamp(39px, 11.7vw, 58px);
    letter-spacing: -0.07em;
    line-height: 1.16;
  }

  .hero-summary {
    margin-top: 22px;
    font-size: 14px;
    line-height: 1.85;
  }

  .hero-actions {
    margin-top: 26px;
  }

  .button {
    min-height: 44px;
    padding: 0 17px;
    font-size: 12px;
  }

  .capability-strip {
    margin-top: 42px;
  }

  .capability-strip li {
    grid-template-columns: 1fr;
    gap: 1px;
    padding-right: 6px;
  }

  .capability-strip span {
    display: none;
  }

  .capability-strip strong {
    font-size: 12px;
  }

  .capability-strip small {
    font-size: 9px;
  }

  .hero-visual {
    min-height: 350px;
    margin-top: 0;
  }

  .orbit--outer {
    width: 320px;
    height: 320px;
  }

  .orbit--inner {
    width: 248px;
    height: 248px;
  }

  .signal-card {
    width: min(100%, 326px);
    padding: 18px;
  }

  .floating-label {
    display: none;
  }

  .scroll-cue {
    bottom: 22px;
  }

  .content-section {
    padding: 68px 18px 54px;
    scroll-margin-top: calc(var(--nav-height) + 14px);
  }

  .section-hero {
    display: block;
    min-height: 0;
    padding: 2px 0 30px;
  }

  .section-hero h2 {
    margin-top: 12px;
    font-size: clamp(31px, 9.4vw, 40px);
    line-height: 1.22;
  }

  .section-lead {
    margin-top: 10px;
    font-size: 13px;
    line-height: 1.8;
  }

  .section-art {
    display: none;
  }

  .scenario-card {
    flex-basis: 78vw;
    width: 78vw;
    height: 356px;
    margin: 0;
    padding: 18px;
    --reveal-delay: 0ms !important;
  }

  .card-track {
    gap: 16px;
  }

  .scenario-card h3 {
    font-size: 16.5px;
  }

  .scenario-card p {
    font-size: 13px;
  }

  .carousel-arrow {
    display: none;
  }

  .carousel-footer {
    gap: 11px;
    margin-top: 4px;
  }

  .carousel-hint {
    font-size: 9px;
  }

  .carousel-hint span {
    width: 11px;
  }

  .about-section {
    padding: 54px 18px 0;
    scroll-margin-top: calc(var(--nav-height) + 14px);
  }

  .about-shell {
    gap: 34px;
    padding: 30px 22px;
    border-radius: 18px;
  }

  .about-intro h2 {
    font-size: 25px;
    line-height: 1.5;
  }

  .about-intro > p:last-child {
    font-size: 13px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 0 30px;
    font-size: 9px;
  }
}

@media (max-width: 380px) {
  .brand-copy {
    display: none;
  }

  .hero-title {
    font-size: 37px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .signal-route span {
    padding-right: 5px;
    padding-left: 5px;
  }
}

@media (hover: none) {
  .scenario-card:hover {
    transform: none;
  }
}

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

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

  .hero-eyebrow,
  .hero-summary,
  .hero-actions,
  .capability-strip,
  .hero-visual,
  .title-line > span {
    opacity: 1;
    transform: none;
  }

  .js .reveal,
  .js .reveal-card {
    opacity: 1;
    transform: none;
  }
}