/* =====================================================================
   马步多多 — 简洁浅色商务设计系统 (Light Corporate)
   白/浅灰底 + 单一蓝强调 + 近黑墨字 + 1px 细灰边 + 极简阴影 + 深蓝页脚。
   专业、克制、可信；纯手写、系统字体、无渐变、无外部依赖。
   复用主站/详情页既有类名(hero/nb-card/app-card/fp-nav/fp-footer…)重新着色。
   ===================================================================== */
:root{
  --bg:#FFFFFF; --bg-soft:#F7F8FA; --bg-tint:#EFF3FB; --surface:#FFFFFF;
  --ink:#111827;        /* 标题/近黑 */
  --text:#374151;       /* 正文 */
  --muted:#6B7280;      /* 次要 */
  --line:#E5E7EB;       /* 细边 */
  --line-2:#D6DBE3;
  --brand:#2563EB; --brand-dark:#1D4ED8; --brand-tint:#EFF4FE; --brand-line:#DCE6FB;
  --navy:#0F1B33;       /* 深蓝页脚/CTA */
  --r-sm:6px; --r:10px; --r-lg:14px; --r-pill:999px;
  --sh-sm:0 1px 2px rgba(17,24,39,.05);
  --sh:0 6px 20px -8px rgba(17,24,39,.12);
  --container:1200px; --nav-h:66px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Roboto,"Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.2,.6,.2,1);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{margin:0 0 .5em;color:var(--ink);font-weight:700;line-height:1.25;letter-spacing:-.01em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-sm{padding:56px 0}
.section-paper2,.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.center{text-align:center}
.muted{color:var(--muted)}
.section-head{max-width:720px;margin:0 auto 52px}
.section-head.center{text-align:center}
.section-head h2{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:700;margin-bottom:.4em}
.section-head p{font-size:clamp(1rem,1.2vw,1.12rem);color:var(--muted);margin:0}

/* eyebrow = 专业小标签（统一蓝，忽略旧撞色变体） */
.eyebrow,.eyebrow.c1,.eyebrow.c2,.eyebrow.c3,.eyebrow.c4{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--brand);background:var(--brand-tint);border:1px solid var(--brand-line);border-radius:var(--r-pill);padding:.3rem .85rem;box-shadow:none;margin-bottom:1.15rem}

/* ---------- Buttons（扁平专业） ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem 1.4rem;min-height:44px;font-size:1rem;font-weight:600;line-height:1;cursor:pointer;color:var(--ink);background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);box-shadow:none;white-space:nowrap;text-decoration:none;transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease)}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary,.btn-blue{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 1px 2px rgba(37,99,235,.28)}
.btn-primary:hover,.btn-blue:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;box-shadow:0 6px 18px -6px rgba(37,99,235,.5)}
.btn-ghost,.btn-yellow,.btn-ink{background:var(--surface);color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover,.btn-yellow:hover,.btn-ink:hover{color:var(--brand);border-color:var(--brand)}
.btn-lg{padding:.88rem 1.9rem;min-height:52px;font-size:1.06rem}
.btn .ico{width:1.1em;height:1.1em;transition:transform .18s var(--ease)}
.btn:hover .ico{transform:translateX(3px)}

/* ---------- Navbar ---------- */
.fp-nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .22s var(--ease),border-color .22s var(--ease)}
.fp-nav.is-scrolled{box-shadow:var(--sh-sm);border-bottom-color:var(--line-2)}
.fp-nav .container{position:relative}
.fp-nav__inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:1rem}
.fp-nav__left{display:inline-flex;align-items:center;gap:.65rem;min-width:0}
.fp-brand{display:inline-flex;align-items:center;gap:.55rem;font-weight:700;font-size:1.14rem;color:var(--ink);letter-spacing:-.01em;text-decoration:none}
.fp-brand:hover{color:var(--ink)}
.fp-brand__mark{width:34px;height:34px;flex:none;border-radius:9px;background:var(--brand);display:inline-flex;align-items:center;justify-content:center}
.fp-brand__mark svg{width:19px;height:19px;color:#fff}
.fp-brand small{display:block;font-size:.6rem;font-weight:600;letter-spacing:.15em;color:var(--muted);text-transform:uppercase;margin-top:1px}
.fp-nav__appname{font-weight:600;font-size:.92rem;color:var(--muted);padding-left:.7rem;margin-left:.1rem;border-left:1px solid var(--line-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:42vw}
.fp-nav__links{display:flex;align-items:center;gap:.15rem}
.fp-nav__links a:not(.btn){font-weight:600;font-size:.96rem;color:var(--text);padding:.5rem .85rem;border-radius:8px;text-decoration:none;transition:color .18s var(--ease),background .18s var(--ease)}
.fp-nav__links a:not(.btn):hover{color:var(--brand);background:var(--brand-tint)}
.fp-nav__links a.active{color:var(--brand)}
.fp-nav__cta{margin-left:.4rem}
.fp-nav__toggle{display:none}
.fp-burger{display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:9px;background:var(--surface);cursor:pointer;align-items:center;justify-content:center;color:var(--ink)}
.fp-burger svg{width:24px;height:24px}
.fp-burger .x{display:none}
@media (max-width:900px){
  .fp-burger{display:inline-flex}
  .fp-nav__links{position:absolute;left:0;right:0;top:calc(var(--nav-h) + 6px);flex-direction:column;align-items:stretch;gap:.15rem;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh);padding:.6rem;max-height:0;overflow:hidden;opacity:0;transform:translateY(-6px);pointer-events:none;transition:max-height .28s var(--ease),opacity .2s var(--ease),transform .22s var(--ease)}
  .fp-nav__links a:not(.btn){padding:.8rem .7rem;border-radius:8px}
  .fp-nav__links .fp-nav__cta{margin:.4rem 0 .1rem;display:flex}
  .fp-nav__appname{display:none}
  .fp-nav__toggle:checked ~ .fp-nav__links{max-height:420px;opacity:1;transform:none;pointer-events:auto}
  .fp-nav__toggle:checked ~ .fp-burger .menu{display:none}
  .fp-nav__toggle:checked ~ .fp-burger .x{display:block}
}

/* ---------- Hero ---------- */
.marquee{display:none}
.hero{position:relative;padding:clamp(64px,9vw,112px) 0 clamp(52px,7vw,88px);background:var(--bg);border-bottom:1px solid var(--line)}
.hero::before{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(60% 55% at 50% 0%,var(--bg-tint),transparent 70%);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero__inner{max-width:820px}
.hero__inner.center{margin:0 auto;text-align:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:800;line-height:1.15;letter-spacing:-.02em;color:var(--ink);margin-bottom:.35em}
.hero h1 .hl,.hero h1 .hl.blue,.hero h1 .hl.coral{display:inline;background:none;border:0;box-shadow:none;padding:0;transform:none;color:var(--brand)}
.hero__sub{font-size:clamp(1.05rem,1.5vw,1.24rem);color:var(--muted);max-width:640px;margin:0 0 2rem;line-height:1.75}
.hero__inner.center .hero__sub{margin-left:auto;margin-right:auto}
.hero__actions{display:flex;gap:.8rem;flex-wrap:wrap}
.hero__inner.center .hero__actions{justify-content:center}
.hero__stats{display:flex;gap:clamp(1.6rem,4vw,3.2rem);flex-wrap:wrap;margin-top:3rem}
.hero__inner.center .hero__stats{justify-content:center}
.hero__stat{background:none;border:0;box-shadow:none;padding:0;min-width:0}
.hero__stat b,.hero__stat:nth-child(1) b,.hero__stat:nth-child(2) b,.hero__stat:nth-child(3) b{display:block;font-size:clamp(1.7rem,3vw,2.3rem);font-weight:800;color:var(--brand);letter-spacing:-.02em;line-height:1}
.hero__stat span{font-size:.9rem;color:var(--muted)}

/* ---------- Page header ---------- */
.page-head{position:relative;padding:clamp(56px,7vw,90px) 0 clamp(32px,4vw,46px);background:var(--bg-soft);border-bottom:1px solid var(--line);text-align:center}
.page-head .container{position:relative;z-index:1}
.page-head h1{font-size:clamp(1.9rem,4vw,2.8rem);font-weight:800}
.page-head p{max-width:620px;margin:.4rem auto 0;color:var(--muted);font-size:clamp(1rem,1.3vw,1.15rem)}

/* ---------- Grid & cards ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.nb-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:none;padding:30px;height:100%;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.nb-card:hover{border-color:#C7D2E5;box-shadow:var(--sh);transform:translateY(-3px)}
.nb-card h3{font-size:1.2rem;font-weight:700;margin-bottom:.45rem;color:var(--ink)}
.nb-card h3 small{display:block;font-weight:600;color:var(--muted);font-size:.8rem;letter-spacing:.03em;text-transform:uppercase;margin-top:.18rem}
.nb-card p{color:var(--muted);margin:0;font-size:.98rem;line-height:1.75}
.nb-ico,.nb-ico.blue,.nb-ico.coral,.nb-ico.yellow,.nb-ico.mint,.nb-ico.pink{width:52px;height:52px;border:0;border-radius:12px;box-shadow:none;display:inline-flex;align-items:center;justify-content:center;background:var(--brand-tint);color:var(--brand);margin-bottom:20px}
.nb-ico svg{width:26px;height:26px}

/* ---------- Product cards ---------- */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.app-card{display:flex;flex-direction:column;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:none;padding:26px;height:100%;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.app-card:hover{border-color:#C7D2E5;box-shadow:var(--sh);transform:translateY(-3px)}
.app-card__head{display:flex;align-items:center;gap:14px}
.app-card__logo,.app-card:nth-child(6n+1) .app-card__logo,.app-card:nth-child(6n+2) .app-card__logo,.app-card:nth-child(6n+3) .app-card__logo,.app-card:nth-child(6n+4) .app-card__logo,.app-card:nth-child(6n+5) .app-card__logo,.app-card:nth-child(6n+6) .app-card__logo{width:56px;height:56px;flex:none;border:1px solid var(--line);border-radius:13px;box-shadow:none;object-fit:cover;background:#fff}
.app-card__name{font-size:1.12rem;font-weight:700;color:var(--ink);margin:0;line-height:1.25}
.app-card__cat,.app-card:nth-child(6n+1) .app-card__cat,.app-card:nth-child(6n+2) .app-card__cat,.app-card:nth-child(6n+4) .app-card__cat,.app-card:nth-child(6n+5) .app-card__cat{display:inline-block;font-size:.75rem;font-weight:600;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-pill);padding:.1rem .6rem;margin-top:.3rem}
.app-card__desc{color:var(--muted);font-size:.95rem;line-height:1.7;margin:0;flex:1}
.app-card__more{display:inline-flex;align-items:center;gap:.35rem;font-weight:600;font-size:.94rem;color:var(--brand)}
.app-card__more .ico{width:1.05em;height:1.05em;transition:transform .18s var(--ease)}
.app-card:hover .app-card__more .ico{transform:translateX(4px)}

/* ---------- Info cards ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.info-card{display:flex;gap:16px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:none;padding:22px 24px}
.info-card__ico,.info-card:nth-child(4n+1) .info-card__ico,.info-card:nth-child(4n+2) .info-card__ico,.info-card:nth-child(4n+3) .info-card__ico,.info-card:nth-child(4n+4) .info-card__ico{width:46px;height:46px;flex:none;border:0;border-radius:11px;box-shadow:none;display:inline-flex;align-items:center;justify-content:center;background:var(--brand-tint);color:var(--brand)}
.info-card__ico svg{width:22px;height:22px}
.info-card h4{margin:0 0 .25rem;font-size:1rem;font-weight:700;color:var(--ink)}
.info-card p{margin:0;color:var(--muted);font-size:.96rem;word-break:break-word}
.info-card a{color:var(--text);font-weight:500}
.info-card a:hover{color:var(--brand)}

/* prose */
.prose{max-width:760px}
.prose p{font-size:1.08rem;line-height:1.95;color:var(--text)}

/* ---------- CTA band（深蓝） ---------- */
.cta{position:relative;text-align:center;background:var(--navy);color:#fff;border:0;border-radius:var(--r-lg);box-shadow:none;padding:clamp(44px,6vw,72px) 24px;overflow:hidden}
.cta h2{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem);font-weight:700;margin-bottom:.4em}
.cta p{color:rgba(255,255,255,.82);max-width:560px;margin:0 auto 1.6rem;font-size:clamp(1rem,1.3vw,1.12rem)}

/* ---------- Footer（深蓝） ---------- */
.fp-footer{background:var(--navy);color:#AEB9CC;border-top:0;padding:60px 0 28px;margin-top:0}
.fp-footer__top{display:flex;flex-wrap:wrap;gap:34px;justify-content:space-between;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
.fp-footer__brand{max-width:330px}
.fp-footer__brand .fp-brand{color:#fff}
.fp-footer__brand .fp-brand small{color:#8A97AD}
.fp-footer__brand p{margin:.9rem 0 0;color:#93A0B5;font-size:.92rem;line-height:1.8;font-weight:400}
.fp-footer__cols{display:flex;gap:clamp(30px,6vw,68px);flex-wrap:wrap}
.fp-footer__col h5{color:#fff;font-size:.92rem;margin:0 0 .9rem;font-weight:600;letter-spacing:.01em}
.fp-footer__col a{display:block;color:#AEB9CC;font-size:.9rem;padding:.32rem 0;font-weight:400}
.fp-footer__col a:hover{color:#fff}
.fp-footer__bottom{padding-top:22px;display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-items:center;justify-content:center;font-size:.83rem;color:#8A97AD;text-align:center;font-weight:400}
.fp-footer__bottom a{color:#8A97AD}
.fp-footer__bottom a:hover{color:#fff}

/* ---------- Reveal ---------- */
[data-reveal]{opacity:1}
html.js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);transition-delay:var(--d,0s);will-change:opacity,transform}
html.js [data-reveal].in{opacity:1;transform:none}

/* ---------- Back to top ---------- */
.fp-top{position:fixed;right:20px;bottom:20px;z-index:40;width:46px;height:46px;border:1px solid var(--line-2);border-radius:11px;background:rgba(255,255,255,.95);backdrop-filter:blur(6px);color:var(--brand);box-shadow:var(--sh-sm);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s}
.fp-top.show{opacity:1;visibility:visible;transform:none}
.fp-top:hover{border-color:var(--brand);color:var(--brand-dark)}
.fp-top svg{width:22px;height:22px}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .grid-3,.grid-4,.app-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:60px 0}
}
@media (max-width:600px){
  .grid-2,.grid-3,.grid-4,.app-grid,.info-grid{grid-template-columns:1fr}
  .container{padding:0 18px}
  .section{padding:48px 0}
  .nb-card{padding:26px 22px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js [data-reveal]{opacity:1!important;transform:none!important}
  .btn:hover,.nb-card:hover,.app-card:hover,.fp-top:hover{transform:none}
}