/* ============================================================
   金聚鑫AI联创 官网 · 设计系统
   风格方向：Structured Confidence（克制的企业信心感）
   品牌蓝源自 Logo（#0066CC 系），仅用于 CTA 与交互元素
   ============================================================ */

:root {
  /* 墨色结构层 */
  --ink: #0A1322;
  --ink-2: #0F1B30;
  --ink-3: #16253E;
  --paper: #F5F7FB;
  --white: #FFFFFF;

  /* 品牌色（仅用于 CTA 与交互） */
  --blue: #0A5BE0;
  --blue-deep: #0847B6;
  --blue-tint: #EAF0FB;
  --cyan: #35D8E8;

  /* 文字 */
  --text: #22314C;
  --text-2: #55627C;
  --text-3: #8B96AC;
  --text-inv: #F2F6FC;
  --text-inv-2: #A6B3C9;

  /* 线条 */
  --line: #E2E8F1;
  --line-dark: rgba(146, 170, 209, .18);

  /* 字体 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, "Liberation Mono", ui-monospace, monospace;

  /* 节奏 */
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 16px 40px -18px rgba(10, 24, 51, .22);
  --shadow-lg: 0 30px 70px -28px rgba(10, 24, 51, .32);
  --ease: cubic-bezier(.22, .8, .3, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1200px, calc(100% - 48px)); margin-inline: auto; }
@media (max-width: 640px) { .container { width: calc(100% - 40px); } }

.skip {
  position: absolute; left: -999px; top: 12px; z-index: 200;
  background: var(--blue); color: #fff; padding: 10px 18px; border-radius: 8px;
}
.skip:focus { left: 12px; }

/* ---------- 全局动效基座 ---------- */
/* 页面进入 */
@keyframes page-in { from { opacity: 0; } }
body { animation: page-in .45s ease both; }

/* 滚动阅读进度条 */
.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 300;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 0 2px 2px 0; pointer-events: none;
  opacity: 0; transition: opacity .3s;
}
.progress.show { opacity: 1; }

/* 返回顶部 */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 150;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  display: grid; place-items: center; cursor: pointer; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .3s, transform .3s, visibility .3s, background .25s, color .25s, border-color .25s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--blue); color: #fff; border-color: var(--blue); transform: translateY(-3px); }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 800; line-height: 1.22; letter-spacing: .01em; }
.h-display { font-size: clamp(34px, 5.6vw, 60px); font-weight: 900; letter-spacing: .015em; }
.h-section { font-size: clamp(26px, 3.4vw, 40px); }
.lead { font-size: clamp(16px, 1.6vw, 18.5px); color: var(--text-2); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .28em;
  color: var(--blue); text-transform: uppercase;
  margin-bottom: 18px; font-weight: 600;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--blue); }
.eyebrow.on-dark { color: var(--cyan); }
.eyebrow.on-dark::before { background: var(--cyan); }

.section { padding: clamp(72px, 9vw, 120px) 0; }
.section-tight { padding: clamp(56px, 7vw, 88px) 0; }
.section-paper { background: var(--paper); }
.section-dark { background: var(--ink); color: var(--text-inv-2); overflow: hidden; }
.section-dark h2, .section-dark h3, .section-dark strong { color: var(--text-inv); }

.section-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.section-head .lead { margin-top: 16px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::before { display: none; }

/* ---------- 按钮（统一 CTA 文案：立即咨询） ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 14px 30px; border-radius: 999px;
  font-size: 15.5px; font-weight: 700; letter-spacing: .04em;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s, border-color .25s;
}
.btn .arr { transition: transform .25s var(--ease); font-family: var(--mono); }
.btn:hover .arr { transform: translateX(4px); }
.btn-primary { position: relative; overflow: hidden; background: var(--blue); color: #fff; box-shadow: 0 12px 28px -12px rgba(10, 91, 224, .55); }
.btn-primary::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 42%, rgba(255, 255, 255, .3) 50%, transparent 58%);
  transform: translateX(-135%); transition: transform .65s ease;
}
.btn-primary:hover::after { transform: translateX(135%); }
.btn-primary:hover { background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 18px 36px -12px rgba(8, 71, 182, .55); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -14px rgba(4, 12, 28, .5); }
.btn-line-light { border-color: var(--line-dark); color: var(--text-inv); }
.btn-line-light:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }

/* ---------- 头部导航（液态玻璃） ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .62);
  backdrop-filter: blur(28px) saturate(180%); -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, .5);
  box-shadow: 0 8px 32px -12px rgba(10, 24, 51, .18), inset 0 1px 0 rgba(255, 255, 255, .8);
  transition: box-shadow .35s var(--ease), background .35s var(--ease);
}
.header::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, .5), rgba(255, 255, 255, 0) 60%);
  opacity: .7;
}
.header.scrolled {
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 14px 40px -16px rgba(10, 24, 51, .28), inset 0 1px 0 rgba(255, 255, 255, .9);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 900; font-size: 19px; color: var(--ink); letter-spacing: .02em; }
.brand small { display: block; font-size: 10px; font-weight: 600; letter-spacing: .32em; color: var(--text-3); font-family: var(--mono); }
.brand .mark { flex: none; }
.brand .mark .orbit { transform-origin: 50% 50%; animation: orbit-spin 26s linear infinite; }
@keyframes orbit-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  position: relative; padding: 10px 16px; border-radius: 9px;
  font-size: 16px; font-weight: 600; color: var(--text); letter-spacing: .015em;
  transition: color .25s, background .25s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 3px; height: 2px;
  border-radius: 2px; background: var(--blue);
  transform: scaleX(0); transform-origin: left center;
  transition: transform .32s var(--ease);
}
.nav-links a:hover { color: var(--blue); background: var(--blue-tint); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a[aria-current="page"] { color: var(--blue); }
.nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.nav-cta { margin-left: 14px; padding: 11px 22px; font-size: 14.5px; font-weight: 700; background-color: #fff;}
.nav-cta:hover { color: #fff; }

.nav-toggle { display: none; border: 1px solid var(--line); background: #fff; width: 42px; height: 42px; border-radius: 10px; cursor: pointer; position: relative; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 50%; width: 18px; height: 2px; border-radius: 2px; background: var(--ink); transform: translateX(-50%); transition: transform .3s var(--ease), top .3s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { transform: translateX(-50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: translateX(-50%) rotate(90deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; opacity: 0; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 14px 24px 22px; box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 12px; font-size: 17px; font-weight: 650; color: var(--ink); }
  .nav-links a::after { display: none; }
  .nav-cta { margin: 10px 0 0; text-align: center; }
}

/* ---------- Hero（深空科技风） ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, #030514 0%, #0A0A23 26%, #0D1137 52%, #141852 78%, #080C24 100%);
  color: var(--text-inv-2);
  padding: clamp(88px, 11vw, 148px) 0 clamp(64px, 8vw, 104px);
}
/* 背景层容器 */
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
/* 网格坐标底纹 */
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(126, 180, 252, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 180, 252, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 92% 85% at 50% 42%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 92% 85% at 50% 42%, #000 25%, transparent 78%);
}
/* 多层漂浮光晕 */
.hero-glow { position: absolute; border-radius: 50%; will-change: transform; }
.hero-glow.g1 { width: 620px; height: 620px; left: -140px; top: -120px; background: radial-gradient(circle, rgba(99, 102, 241, .22), transparent 65%); animation: glow-float-1 17s ease-in-out infinite; }
.hero-glow.g2 { width: 700px; height: 700px; right: -200px; top: -100px; background: radial-gradient(circle, rgba(14, 165, 233, .18), transparent 65%); animation: glow-float-2 21s ease-in-out infinite; }
.hero-glow.g3 { width: 520px; height: 520px; left: 16%; bottom: -200px; background: radial-gradient(circle, rgba(139, 92, 246, .16), transparent 65%); animation: glow-float-3 15s ease-in-out infinite; }
.hero-glow.g4 { width: 420px; height: 420px; right: 14%; bottom: -110px; background: radial-gradient(circle, rgba(53, 216, 232, .12), transparent 65%); animation: glow-float-4 13s ease-in-out infinite; }
@keyframes glow-float-1 { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(70px, 46px) scale(1.14); } }
@keyframes glow-float-2 { 0%, 100% { transform: translate(0, 0) scale(1.05); } 50% { transform: translate(-64px, 58px) scale(.94); } }
@keyframes glow-float-3 { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(52px, -42px) scale(1.12); } }
@keyframes glow-float-4 { 0%, 100% { transform: translate(0, 0) scale(.96); } 50% { transform: translate(-46px, -34px) scale(1.1); } }
/* 粒子网络画布 */
.hero-network { position: absolute; inset: 0; width: 100%; height: 100%; }
/* 数据流（由 JS 生成字符列） */
.hero-streams {
  position: absolute; inset: 0; overflow: hidden;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 18%, #000 82%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 18%, #000 82%, transparent);
}
.data-stream {
  position: absolute; top: 0;
  font-family: var(--mono); font-size: 12px; line-height: 1.7;
  color: rgba(53, 216, 232, .3); letter-spacing: .22em;
  writing-mode: vertical-rl; text-orientation: upright; white-space: nowrap;
  text-shadow: 0 0 10px rgba(53, 216, 232, .45);
  animation: stream-fall linear infinite;
}
@keyframes stream-fall { from { transform: translateY(-100%); } to { transform: translateY(118vh); } }
/* 左右分栏布局 */
.hero-body {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: clamp(30px, 5vw, 80px);
}
.hero-content { position: relative; z-index: 1; text-align: left; max-width: 620px; }
/* 右侧齿轮视觉舞台 */
.hero-visual {
  position: relative; display: flex; justify-content: center; align-items: center;
  min-height: 420px;
}
.gear-stage {
  position: relative; width: min(420px, 42vw); aspect-ratio: 1 / 1;
  display: flex; justify-content: center; align-items: center;
}
/* 外围旋转轨道 */
.orbit-track {
  position: absolute; inset: 0;
  transform: rotate(-20deg);
  animation: orbit-track-spin 38s linear infinite;
}
.orbit-svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: .85;
}
.orbit-svg .orbit-ring { transform-origin: 50% 50%; animation: orbit-spin 24s linear infinite; }
/* 轨道上的三个胶囊（位置由 JS 实时计算，跟随轨道旋转；文字反向补偿保持水平） */
.orbit-caps {
  position: absolute; left: 50%; top: 50%;
  margin: 0;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: 999px;
  background: rgba(15, 27, 48, .82); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(146, 170, 209, .28);
  box-shadow: 0 10px 28px -12px rgba(0, 0, 0, .6), 0 0 18px -8px rgba(53, 216, 232, .3);
  white-space: nowrap; font-size: 11.5px; color: var(--text-inv-2);
  transform: translate(-50%, -50%) rotate(var(--cap-rot, 0deg));
  will-change: left, top, transform;
}
.orbit-caps b { color: #fff; font-weight: 700; font-family: var(--mono); font-size: 13px; }
.orbit-caps em { font-style: normal; color: #BFD3F0; }
.orbit-caps .orb-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px rgba(53, 216, 232, .9); flex: none; }
.orbit-caps .orb-dot.blue { background: #8B5CF6; box-shadow: 0 0 8px rgba(139, 92, 246, .9); }
/* 齿轮 */
.hero-gear {
  position: relative; z-index: 1;
  width: 72%; opacity: .95;
  filter: drop-shadow(0 0 30px rgba(192, 132, 252, .18)) drop-shadow(0 0 50px rgba(53, 216, 232, .12));
  animation: gear-float 9s ease-in-out infinite;
}
.hero-gear .gear-spin { transform-origin: 180px 180px; animation: gear-rotate 22s linear infinite; }
.hero-gear .gear-path {
  fill: url(#gearBodyGrad);
  stroke: rgba(192, 132, 252, .55);
  stroke-width: 1.5;
  filter: drop-shadow(0 0 6px rgba(53, 216, 232, .3));
}
.hero-gear .gear-teeth { display: none; }
/* AI 驱动文字：粉紫→青色动态渐变 + 发光 */
.hero-gear .gear-t {
  fill: url(#gearTextGrad);
  filter: drop-shadow(0 0 10px rgba(192, 132, 252, .55)) drop-shadow(0 0 20px rgba(53, 216, 232, .35));
  animation: text-shimmer 4s ease-in-out infinite;
}
.hero-gear .gear-t2 { animation-delay: .5s; }
@keyframes text-shimmer {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(255, 99, 200, .5)) drop-shadow(0 0 16px rgba(192, 132, 252, .35)); }
  50% { filter: drop-shadow(0 0 12px rgba(53, 216, 232, .6)) drop-shadow(0 0 24px rgba(192, 132, 252, .45)); }
}
@keyframes orbit-track-spin { from { transform: rotate(-20deg); } to { transform: rotate(340deg); } }
@keyframes gear-float { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-14px) rotate(1deg); } }
@keyframes gear-rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.hero h1 { color: #fff; margin: 0 0 24px; }
.hero-title {
  filter: drop-shadow(0 0 34px rgba(53, 216, 232, .22));
}
.hero-title .w {
  display: inline-block;
  background: linear-gradient(180deg, #FFFFFF 26%, #A9C6F2 88%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
}
.hero-title em { font-style: normal; color: var(--cyan); -webkit-text-fill-color: var(--cyan); text-shadow: 0 0 26px rgba(53, 216, 232, .65); padding: 0 .08em; }
.hero .lead { color: var(--text-inv-2); max-width: 560px; margin: 0 0 38px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-start; }
/* 公司徽章 */
.hero-badge {
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .24em;
  color: #BFD3F0; margin-bottom: 28px;
  border: 1px solid rgba(146, 170, 209, .3); background: rgba(15, 27, 48, .5);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  padding: 9px 22px; border-radius: 999px;
}
.hero-badge .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); position: relative; flex: none; }
.hero-badge .pulse::after { content: ""; position: absolute; inset: -5px; border-radius: 50%; border: 1px solid var(--cyan); animation: pulse-ring 2s var(--ease) infinite; }
@keyframes pulse-ring { 0% { transform: scale(.5); opacity: 1; } 100% { transform: scale(1.6); opacity: 0; } }

/* Hero 入场编排（JS 时逐级浮现，无 JS 直接可见） */
@keyframes hero-in { from { opacity: 0; transform: translateY(30px); filter: blur(8px); } to { opacity: 1; transform: none; filter: none; } }
.js .hero-badge { opacity: 0; animation: hero-in .8s var(--ease) .12s both; }
.js .hero-title .w:nth-child(1) { opacity: 0; animation: hero-in .9s var(--ease) .26s both; }
.js .hero-title em { display: inline-block; opacity: 0; animation: hero-in .9s var(--ease) .36s both; }
.js .hero-title .w:nth-child(3) { opacity: 0; animation: hero-in .9s var(--ease) .42s both; }
.js .hero-content .lead { opacity: 0; animation: hero-in .85s var(--ease) .56s both; }
.js .hero-actions { opacity: 0; animation: hero-in .85s var(--ease) .7s both; }
.js .hero-visual { opacity: 0; animation: hero-in .9s var(--ease) .5s both; }

@media (max-width: 1080px) {
  .hero-body { grid-template-columns: 1fr; gap: 36px; }
  .hero-content { max-width: 100%; text-align: center; }
  .hero-content .lead { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { min-height: 320px; }
  .gear-stage { width: min(360px, 64vw); }
}
@media (max-width: 640px) {
  .hero-visual { min-height: 280px; }
  .gear-stage { width: min(300px, 78vw); }
}

/* ---------- 数据带（HUD 科技风） ---------- */
.stats {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, #05081C, #0A0F2E 55%, #070B22);
  border-bottom: 1px solid rgba(146, 170, 209, .14);
}
/* 网格底纹 */
.stats::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(126, 180, 252, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 180, 252, .045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 85% 100% at 50% 50%, #000 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 85% 100% at 50% 50%, #000 30%, transparent 85%);
}
/* 扫描光束 */
.stats .beam {
  position: absolute; top: 0; bottom: 0; left: -20%; width: 22%;
  background: linear-gradient(100deg, transparent, rgba(53, 216, 232, .09) 45%, rgba(53, 216, 232, .16) 50%, rgba(53, 216, 232, .09) 55%, transparent);
  animation: beam-sweep 7s var(--ease) infinite; pointer-events: none;
}
@keyframes beam-sweep { 0% { left: -25%; } 55%, 100% { left: 110%; } }
.stats-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 56px 20px 52px; text-align: center; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 24%; bottom: 24%; width: 1px; background: linear-gradient(180deg, transparent, rgba(146, 170, 209, .28), transparent); }
/* HUD 角标 */
.stat::after {
  content: ""; position: absolute; inset: 18px 14px;
  border: 1px solid transparent; pointer-events: none;
  background:
    linear-gradient(var(--cyan), var(--cyan)) left top / 16px 1px,
    linear-gradient(var(--cyan), var(--cyan)) left top / 1px 16px,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 16px 1px,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 1px 16px;
  background-repeat: no-repeat;
  opacity: .28; transition: opacity .4s;
}
.stat:hover::after { opacity: .85; }
.stat b {
  font-size: clamp(52px, 6.4vw, 84px); font-weight: 800; display: block; line-height: 1;
  font-family: var(--mono); letter-spacing: -.01em;
  font-variant-numeric: tabular-nums; white-space: nowrap;
  color: #EAF3FF; margin-bottom: 10px;
  text-shadow: 0 0 22px rgba(53, 216, 232, .5), 0 0 56px rgba(10, 91, 224, .4);
}
.stat b span { display: inline; }
.stat b i {
  font-style: normal; color: var(--cyan); text-shadow: 0 0 22px rgba(53, 216, 232, .8);
  font-size: .55em; margin-left: 2px; vertical-align: .14em;
}
.stat span { font-size: 15px; color: var(--text-inv-2); letter-spacing: .08em; display: block; }
@media (max-width: 860px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
}
@media (max-width: 480px) { .stat + .stat::before { display: none; } .stat { padding: 30px 12px 28px; } .stat::after { inset: 12px 8px; } }

/* ---------- 业务卡片（首页） ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.biz-card {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 0; overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .3s;
}
/* 鼠标聚光灯 */
.biz-card::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(10, 91, 224, .09), transparent 65%);
  opacity: 0; transition: opacity .35s;
}
.biz-card:hover::before { opacity: 1; }
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
/* 顶部业务配图 */
.biz-card .media { display: block; aspect-ratio: 16 / 9.4; overflow: hidden; position: relative; background: var(--ink-2); }
.biz-card .media img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); transition: transform .65s var(--ease); }
.biz-card .media-grad {
  background: linear-gradient(135deg, #1a1f3a 0%, #0d2b3e 50%, #2a1a3e 100%);
  display: flex; align-items: center; justify-content: center; color: rgba(53, 216, 232, .85);
}
.biz-card .media-grad svg { filter: drop-shadow(0 0 14px rgba(53, 216, 232, .5)); transition: transform .65s var(--ease); }
.biz-card:hover .media-grad svg { transform: scale(1.08); }
.biz-card:hover .media img { transform: scale(1.08); }
.biz-card .idx {
  position: absolute; top: 14px; right: 16px; z-index: 2;
  font-family: var(--mono); font-size: 12px; color: rgba(255, 255, 255, .95); letter-spacing: .12em;
  text-shadow: 0 1px 10px rgba(4, 14, 32, .75);
}
.biz-card .body { display: flex; flex-direction: column; gap: 8px; flex: 1; padding: 0 24px 26px; position: relative; z-index: 1; }
.biz-card .icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  margin: -40px 0 10px; background: #fff; color: var(--blue);
  border: 1px solid var(--line); box-shadow: 0 12px 26px -12px rgba(10, 24, 51, .35);
  transition: transform .35s var(--ease), color .3s;
}
.biz-card .icon img { width: 68%; height: 68%; object-fit: contain; }
.biz-card:hover .icon { transform: translateY(-4px) scale(1.06); color: var(--blue-deep); }
.biz-card h3 { font-size: 19px; }
.biz-card p { margin: 0; color: var(--text-2); font-size: 14.5px; }
.biz-card .tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.biz-card .tags span { font-size: 12px; color: var(--text-2); background: var(--paper); border: 1px solid var(--line); padding: 4px 11px; border-radius: 999px; }
.biz-card .more { margin-top: auto; padding-top: 18px; font-size: 13.5px; font-weight: 700; color: var(--blue); display: inline-flex; gap: 7px; align-items: center; }
.biz-card .more .arr { font-family: var(--mono); transition: transform .25s var(--ease); }
.biz-card:hover .more .arr { transform: translateX(4px); }
/* 新业务强调卡 */
.biz-card.feature { grid-column: span 3; flex-direction: row; align-items: center; gap: 30px; background: var(--ink); border-color: var(--ink); color: var(--text-inv-2); overflow: hidden; padding: 0; }
.biz-card.feature:hover { transform: translateY(-6px); }
.biz-card.feature .f-media { flex: 1.05; min-height: 300px; position: relative; }
.biz-card.feature .f-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.biz-card.feature .f-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 55%, var(--ink)); }
.biz-card.feature .f-body { flex: 1.3; padding: 40px 44px 40px 0; display: flex; flex-direction: column; gap: 10px; }
.biz-card.feature .icon { margin: 0; border: none; box-shadow: none; background: rgba(53, 216, 232, .12); color: var(--cyan); }
.biz-card.feature:hover .icon { transform: none; color: var(--cyan); }
.biz-card.feature::before { background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(53, 216, 232, .10), transparent 65%); }
.biz-card.feature h3 { color: #fff; font-size: 25px; }
.biz-card.feature p { color: var(--text-inv-2); font-size: 15px; max-width: 520px; }
.biz-card.feature .tags span { background: rgba(146, 170, 209, .1); border-color: var(--line-dark); color: var(--text-inv-2); }
.biz-card.feature .more { color: var(--cyan); }
.badge-new {
  display: inline-flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 11px;
  letter-spacing: .22em; color: var(--cyan); border: 1px solid rgba(53, 216, 232, .4);
  padding: 5px 12px; border-radius: 999px; width: fit-content; margin-bottom: 8px;
}
.badge-new .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); animation: blink 1.6s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }

/* 特色卡内的实时聊天演示（产品语言：IM 对话流动） */
.chat-stage {
  display: flex; flex-direction: column; gap: 13px; justify-content: center;
  background: linear-gradient(165deg, #101E36, #0A1322);
  background-image:
    linear-gradient(rgba(126, 158, 214, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 158, 214, .05) 1px, transparent 1px);
  background-size: 34px 34px;
  padding: 36px 32px; overflow: hidden;
}
.chat-stage .bubble {
  max-width: 86%; width: fit-content; padding: 10px 15px; border-radius: 13px;
  font-size: 13.5px; line-height: 1.55;
  opacity: 1;
  animation: chat-cycle 14s infinite;
  animation-fill-mode: backwards;
}
.chat-stage .bubble.l { align-self: flex-start; background: rgba(146, 170, 209, .13); color: #DCE6F5; border-bottom-left-radius: 4px; }
.chat-stage .bubble.r { align-self: flex-end; background: linear-gradient(135deg, #0A5BE0, #1FA8E8); color: #fff; border-bottom-right-radius: 4px; }
.chat-stage .bubble:nth-child(1) { animation-delay: .3s; }
.chat-stage .bubble:nth-child(2) { animation-delay: 2.6s; }
.chat-stage .bubble:nth-child(3) { animation-delay: 4.9s; }
.chat-stage .bubble:nth-child(4) { animation-delay: 7.2s; }
.chat-stage .bubble:nth-child(5) { animation-delay: 9.5s; }
@keyframes chat-cycle {
  0%   { opacity: 0; transform: translateY(12px); }
  3%, 88% { opacity: 1; transform: none; }
  94%, 100% { opacity: 0; transform: translateY(-6px); }
}
.chat-stage .typing { display: inline-flex; gap: 5px; align-self: flex-start; padding: 11px 15px; background: rgba(146, 170, 209, .13); border-radius: 13px 13px 13px 4px; }
.chat-stage .typing span { width: 6px; height: 6px; border-radius: 50%; background: #8FA6C8; animation: typing 1.2s infinite; }
.chat-stage .typing span:nth-child(2) { animation-delay: .18s; }
.chat-stage .typing span:nth-child(3) { animation-delay: .36s; }
@keyframes typing { 0%, 60%, 100% { transform: none; opacity: .5; } 30% { transform: translateY(-4px); opacity: 1; } }
@media (max-width: 1080px) { .biz-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px) {
  .biz-grid { grid-template-columns: 1fr; }
  .biz-card.feature { grid-column: span 1; flex-direction: column; padding: 0; }
  .biz-card.feature .f-media { min-height: 220px; width: 100%; }
  .biz-card.feature .f-media::after { background: linear-gradient(180deg, transparent 55%, var(--ink)); }
  .biz-card.feature .f-body { padding: 28px 26px 32px; }
}

/* ---------- IM 深色特性区（首页） ---------- */
/* ---------- IM 即时通讯直播系统（深色焦点区） ---------- */
#im-live { position: relative; overflow: hidden; }
/* 动态背景：流动光带 + 漂浮光晕 */
#im-live::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 1;
  background:
    linear-gradient(120deg, transparent 25%, rgba(53, 216, 232, .18) 50%, transparent 75%),
    radial-gradient(circle at 25% 35%, rgba(53, 216, 232, .28) 0%, transparent 30%),
    radial-gradient(circle at 80% 65%, rgba(99, 102, 241, .24) 0%, transparent 30%),
    radial-gradient(circle at 60% 18%, rgba(236, 72, 153, .18) 0%, transparent 24%),
    radial-gradient(circle at 15% 78%, rgba(53, 216, 232, .22) 0%, transparent 26%);
  background-size: 250% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  animation: im-shimmer 7s ease-in-out infinite, im-glow-drift 12s ease-in-out infinite alternate;
}
@keyframes im-shimmer {
  0%, 100% { background-position: 130% 0, 0 0, 0 0, 0 0, 0 0; }
  50%      { background-position: -130% 0, 0 0, 0 0, 0 0, 0 0; }
}
@keyframes im-glow-drift {
  0%   { background-position: 0 0, 0% 0%, 0% 0%, 0% 0%, 0% 0%; }
  50%  { background-position: 0 0, 12% -10%, -10% 12%, -8% 8%, 9% -7%; }
  100% { background-position: 0 0, 0% 0%, 0% 0%, 0% 0%, 0% 0%; }
}
/* 多重光晕 */
#im-live .im-glow { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(80px); opacity: .6; }
#im-live .im-glow.g1 { width: 520px; height: 520px; right: -100px; top: -140px; background: radial-gradient(circle, rgba(53, 216, 232, .5), transparent 70%); animation: glow-float-1 10s ease-in-out infinite; }
#im-live .im-glow.g2 { width: 460px; height: 460px; left: -120px; bottom: -100px; background: radial-gradient(circle, rgba(99, 102, 241, .55), transparent 70%); animation: glow-float-2 13s ease-in-out infinite; }
#im-live .im-glow.g3 { width: 340px; height: 340px; right: 28%; top: 38%; background: radial-gradient(circle, rgba(236, 72, 153, .35), transparent 70%); animation: glow-float-3 15s ease-in-out infinite; }

.im-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 5vw, 70px); align-items: start; }
.im-right { display: flex; flex-direction: column; gap: 22px; }
.im-right .im-visual { width: 100%; }

/* ---------- 三端手机直播画面 ---------- */
.im-phones { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-top: 10px; }
.im-phone {
  width: 160px; flex: none; border-radius: 22px; padding: 8px 7px 10px;
  background: linear-gradient(160deg, #1a2236, #0c1020);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 18px 40px -14px rgba(0,0,0,.7), inset 0 1px 0 rgba(255,255,255,.08);
  position: relative; transition: transform .4s var(--ease), box-shadow .4s;
  display: flex; flex-direction: column; align-items: center;
}
.im-phone:hover { transform: translateY(-8px); box-shadow: 0 28px 56px -16px rgba(53,216,232,.35), inset 0 1px 0 rgba(255,255,255,.12); }
.phone-notch {
  width: 46px; height: 5px; background: #0a0d16; border-radius: 3px;
  margin: 4px auto 7px; opacity: .7;
}
.phone-screen {
  position: relative; overflow: hidden; border-radius: 15px;
  aspect-ratio: 9 / 16; background: #050810;
  display: flex; flex-direction: column; width: 100%;
}
/* 平台标签 */
.platform-label {
  margin-top: 9px; font-size: 12px; font-weight: 700; letter-spacing: .12em;
  color: var(--cyan); text-shadow: 0 0 10px rgba(53,216,232,.6);
  text-align: center;
}
/* 顶部栏 */
.p-topbar {
  display: flex; align-items: center; gap: 6px; padding: 7px 9px;
  background: linear-gradient(180deg, rgba(0,0,0,.55), transparent);
  font-size: 10px; color: #fff; z-index: 3; flex-shrink: 0;
}
.p-live-dot { width: 7px; height: 7px; border-radius: 50%; background: #ff4d4f; animation: blink 1.2s infinite; flex-shrink: 0; box-shadow: 0 0 6px #ff4d4f; }
.p-viewers { opacity: .92; flex: 1; font-weight: 600; }
.p-follow { background: var(--cyan); color: #050810; font-weight: 700; padding: 2px 7px; border-radius: 9px; font-size: 9px; }
.p-back, .p-more { opacity: .8; font-size: 14px; flex-shrink: 0; }
.p-title { flex: 1; text-align: center; font-weight: 600; font-size: 10px; }

/* ===== 手机1：IM 即时通讯聊天 ===== */
.p-im-chat {
  flex: 1; overflow: hidden; padding: 8px; display: flex; flex-direction: column; gap: 6px;
  background: #0a0f1c;
}
.p-im-msg { font-size: 10px; line-height: 1.4; max-width: 82%; padding: 5px 9px; border-radius: 10px; animation: p-msg-in .4s ease both; word-break: break-all; }
.p-im-msg.left { align-self: flex-start; background: rgba(255,255,255,.1); color: #e8eef8; border-top-left-radius: 3px; }
.p-im-msg.right { align-self: flex-end; background: linear-gradient(135deg, var(--blue), #2a5bd7); color: #fff; border-top-right-radius: 3px; }
.p-im-msg .p-im-name { display: block; font-size: 8px; opacity: .6; margin-bottom: 2px; }
.p-im-bar {
  display: flex; align-items: center; gap: 5px; padding: 6px 8px;
  background: #0a0f1c; border-top: 1px solid rgba(255,255,255,.06); flex-shrink: 0;
}
.p-im-input { flex: 1; font-size: 9px; color: rgba(255,255,255,.4); background: rgba(255,255,255,.08); padding: 4px 9px; border-radius: 11px; }
.p-im-voice, .p-im-emoji, .p-im-plus { font-size: 13px; opacity: .8; }

/* ===== 手机2：语聊派对 ===== */
.p-voice-room {
  flex: 1; overflow: hidden; padding: 10px 8px;
  background: radial-gradient(ellipse at top, #1a1030, #0a0a1c);
}
.p-voice-seats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px 8px; }
.p-seat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.p-avatar {
  width: 32px; height: 32px; border-radius: 50%; position: relative;
  background: linear-gradient(135deg, #3a2d5c, #1e2a4a);
  border: 2px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center; font-size: 13px;
}
.p-seat.speaking .p-avatar { border-color: var(--cyan); box-shadow: 0 0 10px rgba(53,216,232,.6); animation: p-seat-pulse 1.4s ease-in-out infinite; }
.p-seat.empty .p-avatar { background: rgba(255,255,255,.04); border-style: dashed; border-color: rgba(255,255,255,.15); }
.p-avatar .p-mic { position: absolute; bottom: -2px; right: -2px; width: 11px; height: 11px; border-radius: 50%; background: var(--cyan); display: flex; align-items: center; justify-content: center; font-size: 7px; }
.p-seat-name { font-size: 8px; color: rgba(255,255,255,.7); }
.p-seat.empty .p-seat-name { color: rgba(255,255,255,.3); }
@keyframes p-seat-pulse { 0%,100% { box-shadow: 0 0 6px rgba(53,216,232,.4); } 50% { box-shadow: 0 0 16px rgba(53,216,232,.9); } }
.p-voice-bar {
  display: flex; align-items: center; justify-content: center; gap: 14px; padding: 8px;
  background: rgba(0,0,0,.4); border-top: 1px solid rgba(255,255,255,.06); flex-shrink: 0;
}
.p-voice-btn { background: var(--cyan); color: #050810; font-weight: 700; font-size: 10px; padding: 4px 16px; border-radius: 12px; }
.p-voice-emoji, .p-voice-like { font-size: 15px; }
.p-voice-like { animation: p-like-pulse 1.6s ease-in-out infinite; }
/* 直播画面占位 */
.p-live-cover { position: absolute; inset: 0; z-index: 0; }
.p-live-cover::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 35%, rgba(255,255,255,.08), transparent 60%);
}
/* 聊天区 */
.p-chat {
  position: relative; z-index: 2; margin-top: auto; padding: 7px 8px;
  display: flex; flex-direction: column; gap: 5px; max-height: 58%;
  overflow: hidden;
}
.p-msg {
  font-size: 10px; line-height: 1.45; color: rgba(255,255,255,.95);
  background: rgba(0,0,0,.5); padding: 3px 8px; border-radius: 8px;
  align-self: flex-start; max-width: 94%; word-break: break-all;
  backdrop-filter: blur(4px);
  animation: p-msg-in .5s ease both;
}
.p-msg .p-name { color: #7ee8ff; font-weight: 700; margin-right: 4px; }
.p-msg.gift { background: linear-gradient(90deg, rgba(255,107,158,.4), rgba(255,107,158,.1)); color: #fff; border: 1px solid rgba(255,107,158,.3); }
.p-msg.gift .p-name { color: #ff9ecd; }
@keyframes p-msg-in {
  0% { opacity: 0; transform: translateX(-14px); }
  100% { opacity: 1; transform: translateX(0); }
}
/* 礼物飘升 */
.p-gifts { position: absolute; inset: 0; z-index: 4; pointer-events: none; overflow: hidden; }
.p-gift {
  position: absolute; bottom: 12%; font-size: 18px; opacity: 0;
  animation: p-gift-rise linear forwards;
  filter: drop-shadow(0 0 6px rgba(255,180,210,.8));
}
@keyframes p-gift-rise {
  0% { opacity: 0; transform: translateY(0) scale(.5) rotate(0deg); }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-200px) scale(1.2) rotate(30deg); }
}
/* 底部操作栏 */
.p-actionbar {
  position: relative; z-index: 3; display: flex; align-items: center; gap: 7px;
  padding: 7px 8px; background: linear-gradient(0deg, rgba(0,0,0,.6), transparent);
  flex-shrink: 0;
}
.p-input {
  flex: 1; font-size: 9px; color: rgba(255,255,255,.55);
  background: rgba(255,255,255,.12); padding: 4px 9px; border-radius: 11px;
}
.p-gift-btn, .p-like { font-size: 14px; }
.p-like { animation: p-like-pulse 1.6s ease-in-out infinite; }
@keyframes p-like-pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.3); } }
.im-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 34px 0 38px; }
.im-point {
  position: relative; overflow: hidden; border: 1px solid var(--line-dark); border-radius: var(--radius-sm);
  padding: 18px 20px; background: rgba(255, 255, 255, .03);
  transition: border-color .35s, background .35s, transform .35s var(--ease), box-shadow .35s var(--ease);
  transform-style: preserve-3d; will-change: transform;
}
/* 扫光层 */
.im-point::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 40%, rgba(53, 216, 232, .12) 50%, transparent 60%);
  transform: translateX(-140%); transition: transform .7s ease;
}
.im-point:hover {
  border-color: rgba(53, 216, 232, .6); background: rgba(53, 216, 232, .06);
  transform: translateY(-6px); box-shadow: 0 18px 40px -18px rgba(53, 216, 232, .4);
}
.im-point:hover::after { transform: translateX(140%); }
.im-point b { display: flex; align-items: center; gap: 9px; color: #fff; font-size: 15.5px; margin-bottom: 5px; transition: gap .3s; }
.im-point b svg { color: var(--cyan); flex: none; transition: transform .4s var(--ease), filter .4s; }
.im-point:hover b svg { transform: scale(1.18) rotate(-6deg); filter: drop-shadow(0 0 6px rgba(53, 216, 232, .8)); }
.im-point:hover b { gap: 12px; }
.im-point span { font-size: 13px; color: var(--text-inv-2); line-height: 1.6; display: block; transition: color .3s; }
.im-point:hover span { color: rgba(210, 225, 245, .92); }
.im-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; border-top: 1px solid var(--line-dark); padding-top: 26px; margin-top: 6px; }
.im-metrics b { font-family: var(--mono); font-size: clamp(19px, 2vw, 25px); color: var(--cyan); display: block; font-weight: 700; letter-spacing: 0; }
.im-metrics span { font-size: 12.5px; color: var(--text-inv-2); }
.im-visual { position: relative; border-radius: 18px; overflow: hidden; border: 1px solid var(--line-dark); box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .7); transition: transform .5s var(--ease), box-shadow .5s var(--ease); min-height: 340px; background: var(--ink); }
.im-visual:hover { transform: translateY(-8px); box-shadow: 0 56px 110px -32px rgba(0, 0, 0, .85); }
.im-visual img { width: 100%; height: 100%; object-fit: contain; transform: scale(1.01); transition: transform .9s var(--ease); }
.im-visual:hover img { transform: scale(1.05); }
.im-visual .live-tag {
  position: absolute; top: 18px; left: 18px; display: inline-flex; align-items: center; gap: 8px;
  background: rgba(10, 19, 34, .75); backdrop-filter: blur(8px); border: 1px solid rgba(53, 216, 232, .45);
  color: var(--cyan); font-family: var(--mono); font-size: 12px; letter-spacing: .2em;
  padding: 7px 14px; border-radius: 999px;
}
.im-visual .live-tag i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); animation: blink 1.4s infinite; }
@media (max-width: 980px) {
  .im-grid { grid-template-columns: 1fr; }
  .im-points { grid-template-columns: 1fr; }
  .im-metrics { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
  .im-right { align-items: center; }
  .im-phone { width: 160px; }
}

/* ---------- IM 能力滚动字幕 ---------- */
.marquee {
  position: relative; overflow: hidden;
  border-top: 1px solid var(--line-dark);
  margin-top: clamp(48px, 6vw, 72px); padding: 22px 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track { display: flex; width: max-content; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track .grp { display: flex; align-items: center; white-space: nowrap; }
.marquee-track .grp span { font-size: 15.5px; font-weight: 600; letter-spacing: .08em; color: var(--text-inv-2); display: inline-flex; align-items: center; }
.marquee-track .grp span::after {
  content: ""; width: 6px; height: 6px; margin: 0 26px;
  background: var(--cyan); opacity: .7; border-radius: 1.5px; transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(53, 216, 232, .8);
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 关于（首页条带） ---------- */
.about-strip { display: grid; grid-template-columns: .95fr 1.05fr; gap: clamp(36px, 5vw, 68px); align-items: center; }
.about-media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-media img { aspect-ratio: 4 / 3.1; object-fit: cover; width: 100%; transform: scale(1.01); transition: transform .8s var(--ease); }
.about-media:hover img { transform: scale(1.05); }
.about-media::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255, 255, 255, .35); border-radius: inherit; pointer-events: none; }
.about-body .points { display: grid; gap: 14px; margin: 26px 0 32px; padding: 0; list-style: none; }
.about-body .points li { display: flex; gap: 13px; align-items: flex-start; color: var(--text-2); font-size: 15px; }
.about-body .points svg { color: var(--blue); flex: none; margin-top: 3px; }
@media (max-width: 980px) { .about-strip { grid-template-columns: 1fr; } }

/* ---------- 新闻（首页） ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card .media { aspect-ratio: 16 / 9.4; overflow: hidden; }
.news-card .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.news-card:hover .media img { transform: scale(1.05); }
.news-card .body { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.news-card .cat { font-family: var(--mono); font-size: 11.5px; letter-spacing: .18em; color: var(--blue); }
.news-card .meta { font-size: 12.5px; color: var(--text-3); font-family: var(--mono); }
.news-card h3 { font-size: 17.5px; line-height: 1.4; }
.news-card p { margin: 0; color: var(--text-2); font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .more { margin-top: auto; padding-top: 14px; font-size: 13.5px; font-weight: 700; color: var(--blue); display: inline-flex; align-items: center; gap: 7px; }
@media (max-width: 980px) { .news-grid { grid-template-columns: 1fr; } }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--ink); color: var(--text-inv-2); position: relative; overflow: hidden; }
.cta-band .inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; padding: clamp(56px, 7vw, 84px) 0; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(126, 158, 214, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 158, 214, .05) 1px, transparent 1px);
  background-size: 52px 52px;
}
.cta-band h2 { color: #fff; font-size: clamp(24px, 3.2vw, 36px); margin-bottom: 10px; }
.cta-band p { margin: 0; color: var(--text-inv-2); }
.cta-band .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 页头（内页） ---------- */
.page-head {
  background: linear-gradient(160deg, #030514 0%, #0A0A23 30%, #0D1137 60%, #0A0F2E 100%);
  color: var(--text-inv-2);
  padding: clamp(72px, 9vw, 112px) 0 clamp(52px, 6vw, 78px);
  position: relative; overflow: hidden;
}
/* 动态光晕背景 */
.page-head::after {
  content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%;
  right: -140px; top: -200px; pointer-events: none;
  background: radial-gradient(circle, rgba(99, 102, 241, .2), transparent 65%);
  animation: glow-float-2 18s ease-in-out infinite;
}
.page-head::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 15% 80%, rgba(53, 216, 232, .18) 0%, transparent 32%),
    radial-gradient(circle at 85% 15%, rgba(168, 85, 247, .16) 0%, transparent 30%),
    radial-gradient(circle at 50% 50%, rgba(99, 102, 241, .10) 0%, transparent 45%);
  animation: page-orbits 14s ease-in-out infinite alternate;
}
@keyframes page-orbits {
  0%   { background-position: 0% 0%, 0% 0%, 0 0; }
  100% { background-position: 6% -4%, -5% 6%, 0 0; }
}
/* 页头入场 */
@keyframes head-in { from { opacity: 0; transform: translateY(26px); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }
.js .page-head .crumb { opacity: 0; animation: head-in .7s var(--ease) .1s both; }
.js .page-head h1 { opacity: 0; animation: head-in .8s var(--ease) .22s both; }
.js .page-head .lead { opacity: 0; animation: head-in .8s var(--ease) .36s both; }
.page-head .inner { position: relative; z-index: 1; }
.page-head h1 { color: #fff; font-size: clamp(32px, 4.6vw, 52px); margin: 0 0 14px; }
.page-head .lead { color: var(--text-inv-2); max-width: 640px; margin: 0; }
.crumb { font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em; color: var(--text-inv-2); margin-bottom: 22px; display: flex; gap: 10px; }
.crumb a:hover { color: var(--cyan); }

/* ---------- 业务板块页：IM 焦点区 ---------- */
.im-hero { background: var(--ink); position: relative; overflow: hidden; }
.im-hero > * { position: relative; z-index: 1; }
/* 动态粒子层 */
.bg-particles { position: absolute; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bg-particles span { display: block; }
@keyframes bg-particle-float {
  0%, 100% { transform: translateY(0) translateX(0) scale(1); opacity: .3; }
  25% { transform: translateY(-24px) translateX(10px) scale(1.15); opacity: .7; }
  50% { transform: translateY(-12px) translateX(-8px) scale(.9); opacity: .5; }
  75% { transform: translateY(-30px) translateX(6px) scale(1.1); opacity: .8; }
}
.im-hero .wrap { display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(36px, 5vw, 64px); align-items: center; padding: clamp(64px, 8vw, 100px) 0; }
.im-hero .scene-chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 36px; }
.im-hero .scene-chips span { border: 1px solid var(--line-dark); color: var(--text-inv-2); border-radius: 999px; padding: 8px 17px; font-size: 13.5px; transition: color .25s, border-color .25s; }
.im-hero .scene-chips span:hover { color: var(--cyan); border-color: var(--cyan); }
.feat-list { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 1fr; gap: 1px; background: var(--line-dark); border: 1px solid var(--line-dark); border-radius: var(--radius); overflow: hidden; margin-top: 20px; }
.feat-list .cell { background: var(--ink-2); padding: 26px 24px; transition: background .3s; position: relative; overflow: hidden; }
.feat-list .cell > * { position: relative; z-index: 2; }
.feat-list .cell:hover { background: var(--ink-3); }
/* 能力格：仅保留 hover 扫光，不做持续背景 */
.feat-list .cell::before { display: none; }
.feat-list .cell .no { font-family: var(--mono); font-size: 12px; color: var(--cyan); letter-spacing: .16em; margin-bottom: 12px; }
.feat-list .cell b { color: #fff; font-size: 16px; display: block; margin-bottom: 8px; }
.feat-list .cell p { margin: 0; font-size: 13.5px; color: var(--text-inv-2); line-height: 1.7; }
@media (max-width: 980px) {
  .im-hero .wrap { grid-template-columns: 1fr; }
  .feat-list { grid-template-columns: 1fr; }
}

/* ---------- 业务板块页：编号账本行 ---------- */
.ledger { display: grid; }
/* 第二大板块整体动态背景：浅色流光 + 漂浮光晕 */
.section-ledger { position: relative; overflow: hidden; }
.section-ledger::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background:
    linear-gradient(120deg, transparent 30%, rgba(59,130,246,.10) 50%, transparent 70%),
    radial-gradient(circle at 10% 15%, rgba(53,216,232,.16) 0%, transparent 28%),
    radial-gradient(circle at 90% 85%, rgba(168,85,247,.14) 0%, transparent 28%),
    radial-gradient(circle at 50% 50%, rgba(59,130,246,.06) 0%, transparent 40%);
  background-size: 260% 100%, 100% 100%, 100% 100%, 100% 100%;
  animation: ledger-sec-sheen 8s ease-in-out infinite, ledger-sec-drift 16s ease-in-out infinite alternate;
}
.section-ledger > * { position: relative; z-index: 1; }
@keyframes ledger-sec-sheen {
  0%, 100% { background-position: 150% 0, 0 0, 0 0, 0 0; }
  50%      { background-position: -150% 0, 0 0, 0 0, 0 0; }
}
@keyframes ledger-sec-drift {
  0%   { background-position: 0 0, 0% 0%, 0% 0%, 0 0; }
  50%  { background-position: 0 0, 8% -6%, -7% 7%, 0 0; }
  100% { background-position: 0 0, 0% 0%, 0% 0%, 0 0; }
}
.ledger-row {
  display: grid; grid-template-columns: 84px 1fr 1.15fr 340px auto; gap: clamp(20px, 3vw, 44px); align-items: center;
  padding: clamp(38px, 5vw, 52px) 8px; border-top: 1px solid var(--line);
  transition: background .35s, border-radius .35s, box-shadow .35s, transform .35s var(--ease); position: relative; overflow: hidden; border-radius: 0;
}
.ledger-row:hover {
  border-radius: 16px;
  box-shadow: 0 18px 48px -24px rgba(10, 24, 51, .18), 0 4px 14px -8px rgba(10, 24, 51, .10);
  transform: translateY(-2px);
  border-top-color: transparent;
}
/* 各业务 hover 渐变配色（由浅入深，从对应主题色到白） */
.ledger-row#ai-media:hover { background: linear-gradient(135deg, rgba(255,247,237,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-comic:hover { background: linear-gradient(135deg, rgba(253,242,248,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-cross-border:hover { background: linear-gradient(135deg, rgba(236,253,245,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-agent:hover { background: linear-gradient(135deg, rgba(240,253,250,.95) 0%, rgba(245,243,255,.98) 100%); }
.ledger-row#software-development:hover { background: linear-gradient(135deg, rgba(239,246,255,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#server-service:hover { background: linear-gradient(135deg, rgba(237,253,242,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row:last-child { border-bottom: 1px solid var(--line); }
/* 账本行 hover 渐变背景层（opacity 渐显，避免渐变闪现） */
.ledger-row::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0;
  transition: opacity .4s var(--ease); border-radius: 16px;
}
.ledger-row:hover::after { opacity: 1; }
.ledger-row#ai-media::after { background: linear-gradient(135deg, rgba(255,247,237,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-comic::after { background: linear-gradient(135deg, rgba(253,242,248,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-cross-border::after { background: linear-gradient(135deg, rgba(236,253,245,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#ai-agent::after { background: linear-gradient(135deg, rgba(240,253,250,.95) 0%, rgba(245,243,255,.98) 100%); }
.ledger-row#software-development::after { background: linear-gradient(135deg, rgba(239,246,255,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row#server-service::after { background: linear-gradient(135deg, rgba(237,253,242,.95) 0%, rgba(255,255,255,.98) 100%); }
.ledger-row::before { z-index: 1; }
.ledger-row > * { position: relative; z-index: 2; }

.ledger-row .no { font-family: var(--mono); font-size: 13px; color: var(--text-3); letter-spacing: .12em; padding-top: 4px; }
.ledger-row .no b { display: block; font-size: 30px; color: var(--ink); font-weight: 700; letter-spacing: 0; line-height: 1.1; margin-bottom: 6px; transition: color .3s; }
.ledger-row:hover .no b { color: var(--blue); }
.ledger-row .main h3 { font-size: clamp(20px, 2.4vw, 26px); margin-bottom: 4px; transition: color .3s; }
.ledger-row:hover .main h3 { color: var(--blue-deep); }
.ledger-row .main .en { font-family: var(--mono); font-size: 11.5px; letter-spacing: .24em; color: var(--blue); text-transform: uppercase; }
.ledger-row .desc { color: var(--text-2); font-size: 15px; }
.ledger-row .desc ul { margin: 12px 0 0; padding: 0; list-style: none; display: grid; gap: 7px; }
.ledger-row .desc li { display: flex; gap: 10px; align-items: baseline; font-size: 14px; color: var(--text-2); }
.ledger-row .desc li::before { content: "—"; color: var(--blue); font-family: var(--mono); flex: none; }
.ledger-row .go { padding-top: 0; }
.ledger-row .go a {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700;
  border: 1.5px solid var(--line); color: var(--ink); border-radius: 999px; padding: 11px 20px;
  transition: border-color .25s, background .25s, color .25s, transform .25s var(--ease);
}
.ledger-row .go a:hover { background: var(--blue); border-color: var(--blue); color: #fff; transform: translateY(-2px); }
.ledger-row .go a .arr { font-family: var(--mono); }
/* 行内业务配图 */
.row-media {
  aspect-ratio: 16 / 10; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line); box-shadow: 0 14px 30px -20px rgba(10, 24, 51, .5);
  background: var(--paper);
}
.row-media img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); transition: transform .65s var(--ease); }
.ledger-row:hover .row-media img { transform: scale(1.08); }
@media (max-width: 900px) {
  .ledger-row { grid-template-columns: 56px 1fr; align-items: start; }
  .ledger-row .desc { grid-column: 2; }
  .ledger-row .go { grid-column: 2; padding-top: 4px; }
  .ledger-row .row-media { grid-column: 2; margin-top: 10px; }
  .ledger-row .no b { font-size: 24px; }
}

/* ---------- 新闻页 ---------- */
.news-layout { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 24px; }
.news-layout .news-card.feature { grid-row: span 1; }
.news-layout .news-card.feature .media { aspect-ratio: 16 / 10.5; }
.news-list-rows { margin-top: 26px; display: grid; }
.news-row { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; padding: 20px 4px; border-top: 1px solid var(--line); }
.news-row:last-child { border-bottom: 1px solid var(--line); }
.news-row .t { font-weight: 700; color: var(--ink); font-size: 15.5px; }
.news-row .t:hover { color: var(--blue); }
.news-row .d { font-family: var(--mono); font-size: 12.5px; color: var(--text-3); white-space: nowrap; }
@media (max-width: 980px) { .news-layout { grid-template-columns: 1fr; } }

/* ---------- 关于页 ---------- */
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; background: #fff; transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.value-card::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(10, 91, 224, .08), transparent 65%);
  opacity: 0; transition: opacity .35s;
}
.value-card:hover::before { opacity: 1; }
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.value-card .icon { position: relative; z-index: 1; width: 42px; height: 42px; border-radius: 10px; background: var(--blue-tint); color: var(--blue); display: grid; place-items: center; transition: transform .35s var(--ease); }
.value-card:hover .icon { transform: scale(1.08) rotate(-4deg); }
.value-card b { display: block; font-size: 17px; color: var(--ink); margin: 14px 0 8px; }
.value-card p { margin: 0; font-size: 14px; color: var(--text-2); }
@media (max-width: 900px) { .value-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .value-grid { grid-template-columns: 1fr; } }

.mv-band { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line-dark); border: 1px solid var(--line-dark); border-radius: var(--radius); overflow: hidden; }
.mv-band .cell { background: var(--ink); padding: clamp(30px, 4vw, 48px); }
.mv-band .cell .eyebrow { margin-bottom: 12px; }
.mv-band h3 { color: #fff; font-size: clamp(19px, 2.2vw, 24px); margin-bottom: 10px; }
.mv-band p { margin: 0; color: var(--text-inv-2); font-size: 15px; }
@media (max-width: 820px) { .mv-band { grid-template-columns: 1fr; } }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.contact-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; background: #fff; }
.contact-card .icon { width: 44px; height: 44px; border-radius: 11px; background: var(--blue-tint); color: var(--blue); display: grid; place-items: center; margin-bottom: 14px; }
.contact-card b { display: block; font-size: 16px; color: var(--ink); margin-bottom: 6px; }
.contact-card span, .contact-card a.line { font-size: 14.5px; color: var(--text-2); word-break: break-all; display: block; }
.contact-card a.line:hover { color: var(--blue); }
@media (max-width: 980px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .contact-grid { grid-template-columns: 1fr; } }

.form-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(36px, 5vw, 64px); align-items: start; }
.form-note { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; background: var(--paper); }
.form-note h3 { font-size: 20px; margin-bottom: 12px; }
.form-note p { font-size: 14.5px; color: var(--text-2); }
.form-note .tip { display: flex; gap: 11px; align-items: flex-start; margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); font-size: 13px; color: var(--text-3); }
.form-note .tip svg { color: var(--blue); flex: none; margin-top: 2px; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.field label em { color: #D5303B; font-style: normal; margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%; font-family: inherit; font-size: 15px; color: var(--text);
  background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  padding: 13px 16px; transition: border-color .25s, box-shadow .25s;
}
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(10, 91, 224, .12); }
.field .err { display: none; font-size: 12.5px; color: #D5303B; margin-top: 6px; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: #D5303B; }
.field.invalid .err { display: block; }
.form .submit { grid-column: 1 / -1; }
.form .submit .btn { width: 100%; }
.form-ok { display: none; margin-top: 14px; font-size: 13.5px; color: var(--blue); background: var(--blue-tint); border-radius: var(--radius-sm); padding: 12px 16px; }
.form-ok.show { display: block; }
@media (max-width: 900px) { .form-wrap { grid-template-columns: 1fr; } .form { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: var(--text-inv-2); }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: clamp(30px, 4vw, 56px); padding: clamp(56px, 7vw, 80px) 0 48px; }
.footer .brand { color: #fff; margin-bottom: 18px; }
.footer .brand small { color: var(--text-inv-2); }
.footer-desc { font-size: 14px; color: var(--text-inv-2); max-width: 300px; margin: 0; }
.footer h4 { color: #fff; font-size: 15px; margin: 0 0 18px; letter-spacing: .06em; }
.footer-links { display: grid; gap: 10px; list-style: none; margin: 0; padding: 0; }
.footer-links a { font-size: 14px; color: var(--text-inv-2); transition: color .2s; width: fit-content; }
.footer-links a:hover { color: var(--cyan); }
.footer-contact { display: grid; gap: 12px; font-size: 14px; }
.footer-contact li { display: flex; gap: 10px; align-items: baseline; }
.footer-contact svg { color: var(--cyan); flex: none; transform: translateY(3px); }
.footer-bottom { border-top: 1px solid var(--line-dark); padding: 22px 0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--text-inv-2); }
.footer-bottom a:hover { color: var(--cyan); }
.footer-bottom .icp { font-family: var(--mono); letter-spacing: .04em; }
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; } }

/* ---------- 全站动效增强 ---------- */
/* 卡片 3D 倾斜（JS 设置 --rx/--ry/--ty，仅 hover 设备生效；选择器需压过 .reveal.in） */
@media (hover: hover) {
  .biz-card, .value-card, .news-card { transform-style: preserve-3d; will-change: transform; }
  .js .biz-card.tilt-on.reveal.in,
  .js .value-card.tilt-on.reveal.in,
  .js .news-card.tilt-on.reveal.in {
    transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(var(--ty, 0px));
    transition: transform .18s ease-out, box-shadow .35s var(--ease), border-color .3s;
  }
}
/* 主按钮磁吸光晕 */
.btn-primary { box-shadow: 0 12px 28px -12px rgba(10, 91, 224, .55), 0 0 0 0 rgba(53, 216, 232, 0); }
.btn-primary:hover { box-shadow: 0 18px 36px -12px rgba(8, 71, 182, .55), 0 0 26px -4px rgba(53, 216, 232, .5); }
/* 章节标题：眉标线条生长 */
@keyframes eyebrow-grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.js .reveal.in .eyebrow::before { transform-origin: left center; animation: eyebrow-grow .7s var(--ease) .3s both; }
/* 深色区动态光晕 */
.section-dark, .im-hero, .cta-band { position: relative; }
.section-dark::after, .im-hero::after, .cta-band::after {
  content: ""; position: absolute; width: 640px; height: 640px; border-radius: 50%;
  left: -220px; bottom: -280px; pointer-events: none;
  background: radial-gradient(circle, rgba(99, 102, 241, .14), transparent 65%);
  animation: glow-float-3 19s ease-in-out infinite;
}
.cta-band::before {
  background-image:
    linear-gradient(rgba(126, 180, 252, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 180, 252, .05) 1px, transparent 1px);
  background-size: 52px 52px;
}
.cta-band::after { left: auto; right: -200px; bottom: auto; top: -260px; background: radial-gradient(circle, rgba(53, 216, 232, .12), transparent 65%); animation: glow-float-1 16s ease-in-out infinite; }
/* CTA 文字微光扫过 */
@keyframes cta-shine { 0%, 72%, 100% { background-position: -160% 0; } 88% { background-position: 220% 0; } }
.cta-band h2 {
  background: linear-gradient(100deg, #fff 42%, rgba(53, 216, 232, .95) 50%, #fff 58%);
  background-size: 220% 100%; background-clip: text; -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  animation: cta-shine 6.5s ease-in-out infinite;
}
/* 新闻卡悬停光泽扫过 */
.news-card .media { position: relative; }
.news-card .media::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, .22) 50%, transparent 60%);
  transform: translateX(-130%); transition: transform .7s ease;
}
.news-card:hover .media::after { transform: translateX(130%); }
/* 业务卡编号呼吸 */
@keyframes idx-glow { 0%, 100% { text-shadow: 0 1px 10px rgba(4, 14, 32, .75); } 50% { text-shadow: 0 0 16px rgba(53, 216, 232, .8), 0 1px 10px rgba(4, 14, 32, .75); } }
.biz-card .idx { animation: idx-glow 4s ease-in-out infinite; }
/* 账本行左侧光条 */
.ledger-row::before {
  content: ""; position: absolute; left: 0; top: 18%; bottom: 18%; width: 3px; border-radius: 2px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
  transform: scaleY(0); transform-origin: center; transition: transform .4s var(--ease);
}
.ledger-row:hover::before { transform: scaleY(1); }
/* 能力矩阵单元格扫光 */
.feat-list .cell { position: relative; overflow: hidden; }
.feat-list .cell::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 42%, rgba(53, 216, 232, .07) 50%, transparent 58%);
  transform: translateX(-130%); transition: transform .8s ease;
}
.feat-list .cell:hover::after { transform: translateX(130%); }

/* ---------- 揭示动画（fail-open：无 JS 时内容完全可见） ---------- */
.js .reveal { opacity: 0; transform: translateY(28px) scale(.985); filter: blur(6px); }
.js .reveal.in { opacity: 1; transform: none; filter: none; transition: opacity .8s var(--ease), transform .8s var(--ease), filter .8s var(--ease); }
.js .reveal.d1.in, .js .reveal.d1.in { transition-delay: .08s; }
.js .reveal.d2.in { transition-delay: .16s; }
.js .reveal.d3.in { transition-delay: .24s; }
.js .reveal.d4.in { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}