/* ==========================================================================
   贵州健信安科技有限公司 — 数据标注服务门户
   设计系统 / Design System
   深色科技风 · 霓虹渐变 · 玻璃拟态 · 流体动画
   ========================================================================== */

/* ----------  设计令牌 (Design Tokens)  ---------- */
:root {
  /* 主色 — 科技青 + 电光紫 */
  --c-bg:            #060814;
  --c-bg-soft:       #0b0f24;
  --c-bg-elevate:    #11162e;
  --c-surface:       rgba(255, 255, 255, 0.03);
  --c-surface-2:     rgba(255, 255, 255, 0.06);
  --c-border:        rgba(255, 255, 255, 0.08);
  --c-border-glow:   rgba(80, 224, 255, 0.35);

  --c-cyan:          #38e1ff;
  --c-cyan-deep:     #00b3e6;
  --c-violet:        #7c5cff;
  --c-magenta:       #ff4ecd;
  --c-lime:          #9dff5b;

  --c-text:          #eef2ff;
  --c-text-soft:     #aab3d0;
  --c-text-dim:      #6b7392;

  /* 渐变 */
  --grad-primary:    linear-gradient(120deg, #38e1ff 0%, #7c5cff 55%, #ff4ecd 100%);
  --grad-cyan:       linear-gradient(135deg, #38e1ff, #00b3e6);
  --grad-violet:     linear-gradient(135deg, #7c5cff, #ff4ecd);
  --grad-glow:       radial-gradient(circle at 50% 0%, rgba(124,92,255,.25), transparent 60%);

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", Consolas, monospace;

  /* 尺寸 */
  --maxw: 1240px;
  --radius:   18px;
  --radius-lg: 28px;
  --radius-sm: 10px;

  /* 动效 */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  /* 阴影 */
  --shadow-soft: 0 20px 60px -20px rgba(0,0,0,.6);
  --shadow-glow: 0 0 40px -8px rgba(56,225,255,.45);
}

/* ----------  基础重置  ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 全局背景光晕层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(124,92,255,.16), transparent 55%),
    radial-gradient(800px 500px at 92% 8%, rgba(56,225,255,.12), transparent 55%),
    radial-gradient(700px 700px at 50% 110%, rgba(255,78,205,.10), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

::selection { background: rgba(124,92,255,.4); color: #fff; }

/* 自定义滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--c-bg-soft); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--c-cyan), var(--c-violet));
  border-radius: 10px;
}

/* ----------  布局工具  ---------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; position: relative; z-index: 1; }

.section { padding: 120px 0; position: relative; }
.section--tight { padding: 80px 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--c-cyan);
  padding: 7px 14px;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  background: var(--c-surface);
  backdrop-filter: blur(8px);
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-cyan); box-shadow: 0 0 10px var(--c-cyan);
  animation: pulse 1.8s infinite;
}

.section-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 18px 0 16px;
}
.section-lead {
  color: var(--c-text-soft);
  font-size: clamp(15px, 1.4vw, 18px);
  max-width: 620px;
}
.text-grad {
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.center { text-align: center; }
.center .section-lead { margin-inline: auto; }

/* ----------  按钮  ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600; font-size: 15px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .35s;
  position: relative;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(4px); }

.btn--primary {
  background: var(--grad-primary);
  color: #05060f;
  box-shadow: 0 10px 30px -10px rgba(124,92,255,.6);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -12px rgba(124,92,255,.8); }

.btn--ghost {
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-text);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { border-color: var(--c-border-glow); background: var(--c-surface-2); transform: translateY(-3px); }

/* ----------  导航栏  ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .4s var(--ease), border-color .4s, padding .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6, 8, 20, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--c-border);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 19px; letter-spacing: -.01em; }
.brand__mark {
  width: 38px; height: 38px;
  object-fit: contain;
  display: block; flex-shrink: 0;
}
.brand__sub { font-size: 11px; color: var(--c-text-dim); font-weight: 500; letter-spacing: .04em; display:block; margin-top:-3px;}

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  padding: 9px 16px; border-radius: 999px;
  color: var(--c-text-soft); font-size: 15px; font-weight: 500;
  transition: color .25s, background .25s;
}
.nav__links a:hover, .nav__links a.active { color: var(--c-text); background: var(--c-surface-2); }

.nav__cta { display: flex; align-items: center; gap: 14px; }

.nav__toggle { display: none; width: 44px; height: 44px; border-radius: 12px; background: var(--c-surface); border: 1px solid var(--c-border); position: relative; }
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 18px; height: 2px;
  background: var(--c-text); border-radius: 2px; transform: translate(-50%,-50%); transition: .3s var(--ease);
}
.nav__toggle span::before { transform: translate(-50%, -7px); }
.nav__toggle span::after  { transform: translate(-50%,  7px); }
.nav__toggle.open span { background: transparent; }
.nav__toggle.open span::before { transform: translate(-50%,0) rotate(45deg); }
.nav__toggle.open span::after  { transform: translate(-50%,0) rotate(-45deg); }

/* ----------  Hero  ---------- */
.hero { position: relative; padding: 180px 0 120px; overflow: hidden; }
#particles { position: absolute; inset: 0; z-index: 0; opacity: .9; }
.hero__grid-overlay {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(56,225,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,225,255,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
}
.hero__inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }

.hero h1 {
  font-size: clamp(38px, 5.6vw, 70px);
  line-height: 1.05;
  font-weight: 850;
  letter-spacing: -.03em;
  margin: 24px 0;
}
.hero__lead { font-size: clamp(16px, 1.5vw, 19px); color: var(--c-text-soft); max-width: 540px; margin-bottom: 36px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero__stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.stat__num { font-size: clamp(28px, 3vw, 40px); font-weight: 800; font-family: var(--font-mono); }
.stat__label { color: var(--c-text-dim); font-size: 13px; letter-spacing: .04em; }

/* Hero 可视化卡片 */
.hero__visual { position: relative; }
.glass-card {
  background: linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent);
}
.viz-card { padding: 26px; }
.viz-card__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.viz-card__title { font-family: var(--font-mono); font-size: 13px; color: var(--c-text-soft); letter-spacing: .05em; }
.viz-dots { display: flex; gap: 6px; }
.viz-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--c-surface-2); display: block; }
.viz-dots i:nth-child(1){ background:#ff5f57;} .viz-dots i:nth-child(2){ background:#febc2e;} .viz-dots i:nth-child(3){ background:#28c840;}

/* 标注框可视化 */
.annotate-img {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  aspect-ratio: 16/10;
  background:
    linear-gradient(135deg, #0d1b3a, #1a2456 60%, #2a1a4a),
    var(--c-bg-soft);
}
.annotate-img::after{
  content:""; position:absolute; inset:0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 24px 24px;
}
.bbox { position: absolute; border: 2px solid var(--c-cyan); border-radius: 4px; box-shadow: 0 0 16px rgba(56,225,255,.4); animation: bboxIn .6s var(--ease) backwards; }
.bbox::before {
  content: attr(data-label);
  position: absolute; top: -22px; left: -2px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  background: var(--c-cyan); color: #04121a;
  padding: 2px 7px; border-radius: 4px; white-space: nowrap;
}
.bbox--2 { border-color: var(--c-magenta); box-shadow: 0 0 16px rgba(255,78,205,.4); }
.bbox--2::before { background: var(--c-magenta); color:#1a0414; }
.bbox--3 { border-color: var(--c-lime); box-shadow: 0 0 16px rgba(157,255,91,.4); }
.bbox--3::before { background: var(--c-lime); color:#0e1a04; }

.viz-card__foot { display:flex; gap:8px; flex-wrap:wrap; margin-top:18px; }
.tag-pill { font-family: var(--font-mono); font-size:11px; padding:5px 10px; border-radius:999px; background: var(--c-surface-2); border:1px solid var(--c-border); color: var(--c-text-soft); }

.float-badge {
  position: absolute; padding: 14px 18px; border-radius: 16px;
  background: rgba(11,15,36,.85); border: 1px solid var(--c-border); backdrop-filter: blur(12px);
  display: flex; align-items: center; gap: 12px; box-shadow: var(--shadow-soft);
  animation: float 5s ease-in-out infinite;
}
.float-badge svg { width: 22px; height: 22px; }
.float-badge--tl { top: -22px; left: -30px; }
.float-badge--br { bottom: -26px; right: -24px; animation-delay: 1.5s; }
.float-badge b { font-size: 15px; } .float-badge small { color: var(--c-text-dim); font-size: 12px; display:block;}

/* ----------  Logo 滚动条  ---------- */
.marquee { padding: 36px 0; border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); overflow: hidden; -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; gap: 64px; width: max-content; animation: scroll-x 28s linear infinite; }
.marquee__track span { font-size: 19px; font-weight: 700; color: var(--c-text-dim); white-space: nowrap; letter-spacing: .02em; }

/* ----------  通用网格卡片  ---------- */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 30px;
  position: relative;
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s, background .4s;
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx,50%) var(--my,0%), rgba(124,92,255,.12), transparent 45%);
  opacity: 0; transition: opacity .4s;
}
.card:hover { transform: translateY(-6px); border-color: var(--c-border-glow); background: var(--c-surface-2); }
.card:hover::after { opacity: 1; }

.card__icon {
  width: 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 20px;
  background: var(--c-surface-2); border: 1px solid var(--c-border);
}
.card__icon svg { width: 26px; height: 26px; stroke: var(--c-cyan); }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--c-text-soft); font-size: 15px; }
.card__num { position: absolute; top: 22px; right: 26px; font-family: var(--font-mono); font-size: 13px; color: var(--c-text-dim); }

/* 服务卡（带顶部渐变条） */
.service-card { border-top: 2px solid transparent; }
.service-card:hover { border-top-color: transparent; }
.service-card .bar { position:absolute; top:0; left:0; right:0; height:3px; background: var(--grad-primary); transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease); }
.service-card:hover .bar { transform: scaleX(1); }

/* ----------  流程时间线  ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.flow__line { position:absolute; top: 32px; left: 8%; right: 8%; height: 2px; background: linear-gradient(90deg, var(--c-cyan), var(--c-violet), var(--c-magenta)); opacity:.3; }
.flow__step { text-align: center; position: relative; z-index:1; }
.flow__node {
  width: 66px; height: 66px; border-radius: 20px; margin: 0 auto 18px;
  display: grid; place-items: center;
  background: var(--c-bg-elevate); border: 1px solid var(--c-border);
  font-family: var(--font-mono); font-weight: 800; font-size: 20px;
  color: var(--c-cyan); position: relative;
  transition: .4s var(--ease);
}
.flow__step:hover .flow__node { border-color: var(--c-border-glow); box-shadow: var(--shadow-glow); transform: translateY(-4px); }
.flow__step h4 { font-size: 17px; margin-bottom: 8px; }
.flow__step p { font-size: 14px; color: var(--c-text-soft); }

/* ----------  数据类型展示  ---------- */
.modal-grid { display:grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.modal-card { display:flex; gap:20px; align-items:flex-start; }
.modal-card .card__icon { flex-shrink:0; margin:0; }

/* ----------  CTA 区块  ---------- */
.cta-block {
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, rgba(124,92,255,.16), rgba(56,225,255,.08));
  border: 1px solid var(--c-border);
}
.cta-block::before {
  content:""; position:absolute; inset:0;
  background: var(--grad-glow); pointer-events:none;
}
.cta-block h2 { font-size: clamp(26px, 3.6vw, 42px); font-weight: 800; margin-bottom: 16px; position:relative; }
.cta-block p { color: var(--c-text-soft); max-width: 560px; margin: 0 auto 32px; position:relative; font-size:17px; }
.cta-block .hero__actions { justify-content:center; position:relative; }

/* ----------  页脚  ---------- */
.footer { border-top: 1px solid var(--c-border); padding: 72px 0 32px; margin-top: 40px; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer__about p { color: var(--c-text-soft); font-size: 14px; margin: 16px 0; max-width: 320px; }
.footer h5 { font-size: 14px; letter-spacing: .06em; text-transform: uppercase; color: var(--c-text-dim); margin-bottom: 18px; }
.footer__links li { margin-bottom: 11px; }
.footer__links a { color: var(--c-text-soft); font-size: 14px; transition: color .25s; }
.footer__links a:hover { color: var(--c-cyan); }
.footer__bottom { display:flex; justify-content:space-between; align-items:center; padding-top: 28px; border-top: 1px solid var(--c-border); flex-wrap:wrap; gap:14px; }
.footer__bottom p { color: var(--c-text-dim); font-size: 13px; }
.socials { display:flex; gap:12px; }
.socials a { width:40px; height:40px; border-radius:11px; display:grid; place-items:center; background:var(--c-surface); border:1px solid var(--c-border); transition:.3s; }
.socials a:hover { border-color:var(--c-border-glow); transform:translateY(-3px); }
.socials svg { width:18px; height:18px; stroke: var(--c-text-soft); }

/* ----------  页面头部 Banner (子页面)  ---------- */
.page-hero { padding: 160px 0 70px; position: relative; text-align:center; overflow:hidden; }
.page-hero::before { content:""; position:absolute; inset:0; background: var(--grad-glow); }
.page-hero h1 { font-size: clamp(34px, 5vw, 58px); font-weight: 850; letter-spacing:-.03em; margin:18px 0 14px; position:relative; }
.page-hero p { color: var(--c-text-soft); max-width: 600px; margin: 0 auto; position:relative; font-size:17px; }
.breadcrumb { font-family: var(--font-mono); font-size:13px; color: var(--c-text-dim); position:relative; }
.breadcrumb a:hover { color: var(--c-cyan); }

/* ----------  关于页 — 数据条  ---------- */
.about-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items:center; }
.feature-list li { display:flex; gap:14px; align-items:flex-start; margin-bottom:20px; }
.feature-list .ck { flex-shrink:0; width:26px; height:26px; border-radius:8px; background: var(--grad-cyan); display:grid; place-items:center; }
.feature-list .ck svg { width:15px; height:15px; stroke:#04121a; stroke-width:3; }
.feature-list h4 { font-size:16px; margin-bottom:3px; }
.feature-list p { color: var(--c-text-soft); font-size:14px; }

/* 价值观 */
.value-card { text-align:center; }
.value-card .card__icon { margin:0 auto 20px; }

/* ----------  联系页  ---------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap:48px; align-items:start; }
.contact-info li { display:flex; gap:16px; margin-bottom:26px; align-items:flex-start; }
.contact-info .ci-icon { width:48px; height:48px; border-radius:13px; background:var(--c-surface-2); border:1px solid var(--c-border); display:grid; place-items:center; flex-shrink:0; }
.contact-info .ci-icon svg { width:22px; height:22px; stroke: var(--c-cyan); }
.contact-info h4 { font-size:16px; margin-bottom:3px; }
.contact-info p { color: var(--c-text-soft); font-size:15px; }

.form { background: var(--c-surface); border:1px solid var(--c-border); border-radius: var(--radius-lg); padding: 36px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.field { margin-bottom:20px; }
.field label { display:block; font-size:14px; color:var(--c-text-soft); margin-bottom:8px; }
.field input, .field textarea, .field select {
  width:100%; padding:13px 16px; border-radius:12px;
  background: var(--c-bg-soft); border:1px solid var(--c-border); color: var(--c-text);
  font-family:inherit; font-size:15px; transition:border-color .25s, box-shadow .25s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline:none; border-color:var(--c-border-glow); box-shadow:0 0 0 3px rgba(56,225,255,.12); }
.field textarea { resize:vertical; min-height:130px; }
.form-note { font-size:13px; color:var(--c-text-dim); margin-top:14px; text-align:center; }
.form__alert { display:none; padding:14px 18px; border-radius:12px; background:rgba(157,255,91,.12); border:1px solid rgba(157,255,91,.3); color:var(--c-lime); font-size:14px; margin-bottom:20px; }
.form__alert.show { display:block; animation: bboxIn .4s var(--ease); }

/* ----------  新闻卡  ---------- */
.news-card { display:flex; flex-direction:column; padding:0; }
.news-card__img { aspect-ratio:16/9; background: linear-gradient(135deg,#0d1b3a,#2a1a4a); position:relative; overflow:hidden; }
.news-card__img span { position:absolute; bottom:14px; left:16px; font-family:var(--font-mono); font-size:11px; padding:5px 11px; border-radius:999px; background:rgba(6,8,20,.7); border:1px solid var(--c-border); backdrop-filter:blur(6px); }
.news-card__body { padding:24px; flex:1; display:flex; flex-direction:column; }
.news-card__date { font-family:var(--font-mono); font-size:12px; color:var(--c-text-dim); margin-bottom:10px; }
.news-card h3 { font-size:18px; line-height:1.4; margin-bottom:10px; }
.news-card p { color:var(--c-text-soft); font-size:14px; flex:1; }
.news-card__more { margin-top:16px; color:var(--c-cyan); font-size:14px; font-weight:600; display:inline-flex; align-items:center; gap:6px; }

/* ----------  解决方案行业卡  ---------- */
.industry-card { position:relative; min-height:280px; display:flex; flex-direction:column; justify-content:flex-end; padding:30px; overflow:hidden; }
.industry-card .glow-bg { position:absolute; inset:0; opacity:.4; background:var(--grad-primary); filter:blur(60px); transform:scale(1.2); transition:.5s; }
.industry-card:hover .glow-bg { opacity:.6; }
.industry-card > * { position:relative; z-index:1; }
.industry-card .card__icon { margin-bottom:auto; }

/* ----------  滚动揭示动画  ---------- */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal-delay="3"] { transition-delay: .24s; }
[data-reveal-delay="4"] { transition-delay: .32s; }

/* ----------  关键帧  ---------- */
@keyframes pulse { 0%,100%{ opacity:1; transform:scale(1);} 50%{ opacity:.4; transform:scale(.7);} }
@keyframes float { 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-12px);} }
@keyframes scroll-x { to { transform: translateX(-50%); } }
@keyframes bboxIn { from { opacity:0; transform: scale(.85);} to { opacity:1; transform:scale(1);} }
@keyframes spin { to { transform: rotate(360deg);} }

/* ----------  响应式  ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 70px; }
  .hero__visual { max-width: 520px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 820px) {
  .section { padding: 84px 0; }
  .nav__links, .nav__cta .btn { display: none; }
  .nav__toggle { display: block; }
  .nav__links.open {
    display: flex; flex-direction: column; gap: 6px;
    position: absolute; top: 76px; left: 16px; right: 16px;
    background: rgba(11,15,36,.96); backdrop-filter: blur(18px);
    border: 1px solid var(--c-border); border-radius: 18px; padding: 16px;
  }
  .nav__links.open a { width: 100%; }
  .grid--3, .grid--2, .flow, .modal-grid { grid-template-columns: 1fr; }
  .flow__line { display:none; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .cta-block { padding: 40px 24px; }
}
@media (max-width: 520px) {
  .grid--4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__stats { gap: 28px; }
  .float-badge--tl { left: 0; } .float-badge--br { right: 0; }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}