/* ============================================================
   小红花科技 · 全局样式（无任何外部资源引用）
   设计：暗色科技风 + 品牌红 + 玻璃拟态 + 响应式
   ============================================================ */

:root{
  --bg:#070710;
  --bg-soft:#0d0d1c;
  --surface:rgba(255,255,255,.04);
  --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.10);
  --text:#eef0ff;
  --muted:#9aa0c0;
  --brand:#ff2d55;
  --brand-2:#ff5e7e;
  --violet:#7c3aed;
  --cyan:#22d3ee;
  --gold:#ffd166;
  --grad:linear-gradient(120deg,#ff2d55 0%,#ff5e7e 35%,#a855f7 100%);
  --grad-soft:linear-gradient(120deg,rgba(255,45,85,.18),rgba(124,58,237,.18));
  --radius:18px;
  --shadow:0 20px 60px -20px rgba(124,58,237,.45);
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;scroll-padding-top:90px;-webkit-text-size-adjust:100%}

body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  position:relative;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}

.container{width:min(var(--maxw),92vw);margin-inline:auto}

/* ---------- 背景层 ---------- */
#bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55}

.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 75%);
}

.bg-glow{position:fixed;border-radius:50%;filter:blur(90px);opacity:.5;z-index:0;pointer-events:none;animation:float 16s var(--ease) infinite alternate}
.bg-glow--1{width:520px;height:520px;background:radial-gradient(circle,#ff2d55,transparent 70%);top:-120px;left:-120px}
.bg-glow--2{width:480px;height:480px;background:radial-gradient(circle,#7c3aed,transparent 70%);top:30%;right:-140px;animation-delay:-4s}
.bg-glow--3{width:420px;height:420px;background:radial-gradient(circle,#22d3ee,transparent 70%);bottom:-120px;left:30%;animation-delay:-8s;opacity:.35}

@keyframes float{from{transform:translateY(0) scale(1)}to{transform:translateY(40px) scale(1.08)}}

/* 内容层在背景之上 */
.site-header,.hero,.section,.site-footer{position:relative;z-index:2}

/* ---------- 跳转链接（无障碍 / SEO） ---------- */
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:8px;z-index:999}
.skip-link:focus{left:12px;top:12px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  padding:.85em 1.6em;border-radius:999px;font-weight:600;font-size:.98rem;
  cursor:pointer;border:1px solid transparent;transition:.3s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px -8px rgba(255,45,85,.6)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px -8px rgba(255,45,85,.8)}
.btn--ghost{background:var(--surface);border-color:var(--border);color:var(--text);backdrop-filter:blur(8px)}
.btn--ghost:hover{border-color:var(--brand-2);color:#fff;transform:translateY(-3px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.4s var(--ease);
  backdrop-filter:blur(10px);
}
.site-header.is-scrolled{background:rgba(7,7,16,.72);border-bottom:1px solid var(--border)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:74px}

.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;letter-spacing:.5px}
.brand__logo{display:grid;place-items:center;filter:drop-shadow(0 4px 12px rgba(255,45,85,.5))}
.brand__text em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.nav ul{display:flex;gap:30px}
.nav a{position:relative;font-size:.95rem;color:var(--muted);transition:.25s;font-weight:500}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:.3s var(--ease)}
.nav a:hover{color:#fff}
.nav a:hover::after{width:100%}

.nav-cta{margin-left:6px}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;padding:120px 0 80px}
.hero__inner{max-width:880px}
.hero__eyebrow{display:inline-block;font-size:.85rem;letter-spacing:3px;color:var(--brand-2);font-weight:600;
  border:1px solid var(--border);padding:.4em 1em;border-radius:999px;background:var(--surface);margin-bottom:22px}
.hero__title{font-size:clamp(2.3rem,6vw,4.4rem);line-height:1.12;font-weight:800;letter-spacing:-1px;margin-bottom:22px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{font-size:clamp(1rem,2.2vw,1.22rem);color:var(--muted);max-width:680px;margin-bottom:34px}
.hero__sub strong{color:var(--text);font-weight:600}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:54px}

.hero__stats{display:flex;flex-wrap:wrap;gap:34px}
.hero__stats li{display:flex;align-items:baseline;gap:6px;flex-direction:column}
.stat-num{font-size:clamp(2rem,4vw,2.8rem);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat-suffix{font-size:1.6rem;font-weight:800;color:var(--brand-2)}
.stat-label{font-size:.85rem;color:var(--muted);margin-top:6px}

.hero__scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:.75rem;color:var(--muted);letter-spacing:2px;display:flex;flex-direction:column;align-items:center;gap:8px}
.hero__scroll span{width:22px;height:36px;border:2px solid var(--border);border-radius:12px;position:relative}
.hero__scroll span::after{content:"";position:absolute;top:6px;left:50%;transform:translateX(-50%);width:4px;height:8px;background:var(--brand-2);border-radius:2px;animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:0;top:6px}40%{opacity:1}80%{opacity:0;top:18px}100%{opacity:0}}

/* ---------- 通用区块 ---------- */
.section{padding:100px 0}
.section--alt{background:linear-gradient(180deg,transparent,rgba(124,58,237,.05),transparent)}

.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-kicker{font-size:.8rem;letter-spacing:4px;color:var(--brand-2);font-weight:700;margin-bottom:12px}
.section-head h2{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;letter-spacing:-.5px}
.section-desc{color:var(--muted);margin-top:14px;font-size:1.05rem}

/* ---------- 业务卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  position:relative;padding:30px 26px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--border);overflow:hidden;
  transition:.4s var(--ease);backdrop-filter:blur(8px);
}
.card::before{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:.4s}
.card:hover{transform:translateY(-8px);border-color:rgba(255,94,126,.5);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card>*{position:relative}
.card__icon{display:grid;place-items:center;width:56px;height:56px;border-radius:14px;
  background:var(--grad);color:#fff;margin-bottom:18px;box-shadow:0 10px 24px -8px rgba(255,45,85,.6)}
.card h3{font-size:1.22rem;font-weight:700;margin-bottom:10px}
.card p{color:var(--muted);font-size:.96rem}

/* ---------- 关于我们 ---------- */
.about{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.about__media{display:grid;place-items:center;min-height:340px}
.about__text h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;margin:10px 0 18px}
.about__text p{color:var(--muted);margin-bottom:14px}
.about__text strong{color:var(--text)}
.about__list{margin-top:18px;display:grid;gap:10px}
.about__list li{color:var(--text);background:var(--surface);border:1px solid var(--border);padding:12px 16px;border-radius:12px;font-size:.96rem}

/* 轨道动画 */
.orbit{position:relative;width:300px;height:300px;display:grid;place-items:center}
.orbit__core{width:84px;height:84px;border-radius:50%;background:var(--grad);box-shadow:0 0 50px rgba(255,45,85,.7);animation:pulse 3s ease-in-out infinite}
.orbit__ring{position:absolute;border:1px solid var(--border);border-radius:50%}
.orbit__ring--1{width:160px;height:160px;animation:spin 12s linear infinite}
.orbit__ring--2{width:220px;height:220px;animation:spin 18s linear infinite reverse}
.orbit__ring--3{width:290px;height:290px;animation:spin 26s linear infinite}
.orbit__dot{position:absolute;width:14px;height:14px;border-radius:50%;background:var(--cyan);box-shadow:0 0 16px var(--cyan)}
.orbit__dot--1{top:22px;left:50%;transform:translateX(-50%)}
.orbit__dot--2{bottom:30px;right:34px;background:var(--gold);box-shadow:0 0 16px var(--gold)}
.orbit__dot--3{top:120px;left:8px;background:var(--violet);box-shadow:0 0 16px var(--violet)}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}

/* ---------- 技术实力 ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{padding:28px 24px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);transition:.4s var(--ease)}
.feature:hover{transform:translateY(-6px);border-color:rgba(124,58,237,.5)}
.feature__no{font-size:1.6rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.feature h3{font-size:1.15rem;margin:10px 0 8px}
.feature p{color:var(--muted);font-size:.95rem}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;padding:30px 22px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border)}
.step__num{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:1.2rem;margin-bottom:16px;box-shadow:0 10px 24px -8px rgba(255,45,85,.6)}
.step h3{font-size:1.1rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:.93rem}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:820px;margin-inline:auto}
.faq__item{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px 24px;transition:.3s}
.faq__item:hover{border-color:rgba(255,94,126,.4)}
.faq__item h3{font-size:1.08rem;font-weight:700;margin-bottom:6px}
.faq__item p{color:var(--muted);font-size:.96rem}

/* ---------- CTA ---------- */
.cta{padding:110px 0}
.cta__inner{text-align:center;max-width:720px;margin-inline:auto;padding:60px 40px;border-radius:28px;
  background:var(--grad-soft);border:1px solid var(--border);position:relative;overflow:hidden}
.cta__inner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,rgba(255,45,85,.25),transparent 60%)}
.cta__inner>*{position:relative}
.cta__inner h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;margin-bottom:14px}
.cta__inner p{color:var(--muted);margin-bottom:26px;font-size:1.05rem}
.cta__actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--border);background:var(--bg-soft);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px}
.footer-col h4{font-size:1rem;margin-bottom:16px;color:#fff}
.footer-about{color:var(--muted);font-size:.92rem;margin-top:14px;max-width:320px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--muted);font-size:.92rem;transition:.25s}
.footer-col a:hover{color:var(--brand-2)}
.footer-col li{color:var(--muted);font-size:.92rem}
.footer-bottom{margin-top:40px;padding-top:24px;border-top:1px solid var(--border);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.85rem}

/* ---------- 滚动揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1024px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .features,.steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about{grid-template-columns:1fr;gap:36px}
}

@media (max-width:760px){
  .nav{position:fixed;inset:74px 0 auto 0;background:rgba(7,7,16,.96);backdrop-filter:blur(14px);
    transform:translateY(-130%);transition:.4s var(--ease);border-bottom:1px solid var(--border);padding:18px 0}
  .nav.is-open{transform:translateY(0)}
  .nav ul{flex-direction:column;gap:0;align-items:stretch}
  .nav a{display:block;padding:14px 7vw;font-size:1.05rem}
  .nav a::after{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .cards,.features,.steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:72px 0}
  .hero{padding:110px 0 60px}
  .hero__stats{gap:22px}
  .cta__inner{padding:44px 22px}
  .footer-bottom{flex-direction:column}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}