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

:root{
  --bg:#f6f8fc;
  --paper:#ffffff;
  --ink:#0f172a;
  --muted:rgba(15,23,42,.70);
  --muted2:rgba(15,23,42,.60);
  --line:rgba(15,23,42,.10);
  --blue:#2563eb;
  --cyan:#06b6d4;
  --lime:#a3e635;
  --shadow:0 14px 44px rgba(2,6,23,.12);
  --r:18px;
}

html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.8;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 16px;
}

/* Top header */
.header{
  position:sticky;
  top:0;
  z-index:20;
  background:rgba(246,248,252,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(15,23,42,.08);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:900;
  letter-spacing:.3px;
}
.brand__mark{
  width:40px;height:40px;border-radius:14px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  box-shadow:0 18px 54px rgba(37,99,235,.20);
  color:#051021;
  display:inline-flex;align-items:center;justify-content:center;
  position:relative;
}
.brand__mark::after{
  content:"";
  position:absolute;inset:-6px;
  border-radius:18px;
  background:radial-gradient(circle at 30% 30%, rgba(163,230,53,.34), rgba(163,230,53,0) 60%);
  z-index:-1;
}
.brand__name{display:flex;flex-direction:column;line-height:1.05}
.brand__name strong{font-size:15px}
.brand__name small{font-size:12px;color:rgba(15,23,42,.62);font-weight:900}

.nav{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.nav a{
  font-size:14px;
  font-weight:900;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid transparent;
  color:rgba(15,23,42,.82);
  transition:background .18s ease, border-color .18s ease, transform .18s ease;
}
.nav a:hover{
  background:rgba(6,182,212,.10);
  border-color:rgba(6,182,212,.18);
}
.nav a.active{
  background:rgba(163,230,53,.22);
  border-color:rgba(163,230,53,.28);
  color:#22420a;
}

.cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:999px;
  background:var(--ink);color:rgba(255,255,255,.92);
  font-weight:900;font-size:13px;
  box-shadow:0 16px 40px rgba(15,23,42,.18);
}
.cta:hover{transform:translateY(-1px)}

/* Hero with diagonal */
.hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg, rgba(6,182,212,.18), rgba(37,99,235,.14));
  border-bottom:1px solid rgba(15,23,42,.06);
}
.hero::before{
  content:"";
  position:absolute;inset:-20px;
  background:
    radial-gradient(700px 360px at 18% 12%, rgba(37,99,235,.28), rgba(37,99,235,0)),
    radial-gradient(700px 360px at 85% 0%, rgba(163,230,53,.24), rgba(163,230,53,0));
  transform:skewY(-6deg);
  transform-origin:top left;
}
.hero__inner{
  position:relative;
  padding:44px 0 26px;
}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:900;letter-spacing:1px;text-transform:uppercase;
  padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.78);
  border:1px solid rgba(15,23,42,.10);
}
.kicker i{width:10px;height:10px;border-radius:999px;background:linear-gradient(135deg,var(--lime),#22c55e);display:inline-flex}
.hero h1{font-size:34px;line-height:1.18;margin:12px 0 10px}
.hero p{font-size:14px;color:rgba(15,23,42,.74);max-width:820px}
.hero__grid{
  display:grid;
  grid-template-columns:minmax(0, 1.1fr) minmax(0, .9fr);
  gap:14px;
  align-items:stretch;
  margin-top:14px;
}
.hero__actions{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 16px;border-radius:999px;
  border:1px solid transparent;font-size:14px;font-weight:900;
  transition:transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.btn--lime{
  background:var(--lime);
  color:#1f3b09;
  box-shadow:0 16px 40px rgba(163,230,53,.22);
}
.btn--lime:hover{transform:translateY(-1px);background:#8ee000}
.btn--ghost{
  background:#ffffff;border-color:rgba(15,23,42,.12);color:rgba(15,23,42,.88)
}
.btn--ghost:hover{transform:translateY(-1px);border-color:rgba(15,23,42,.22)}

.heroCard{
  background:rgba(255,255,255,.86);
  border:1px solid rgba(15,23,42,.10);
  border-radius:calc(var(--r) + 8px);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.heroCard img{height:220px;width:100%;object-fit:cover}
.heroCard__pad{padding:14px}
.heroCard__pad strong{display:block;font-size:14px}
.heroCard__pad span{display:block;font-size:12px;color:rgba(15,23,42,.64);margin-top:2px}

/* Page shell: sticky TOC */
.shell{
  display:grid;
  grid-template-columns:minmax(0, 1fr) 260px;
  gap:14px;
  padding:22px 0;
}
.toc{
  position:sticky;
  top:84px;
  align-self:start;
  background:#ffffff;
  border:1px solid rgba(15,23,42,.10);
  border-radius:calc(var(--r) + 8px);
  box-shadow:0 12px 28px rgba(2,6,23,.06);
  padding:14px;
}
.toc h3{font-size:14px;margin-bottom:10px}
.toc a{
  display:block;
  font-size:13px;
  font-weight:900;
  padding:8px 10px;
  border-radius:14px;
  color:rgba(15,23,42,.78);
  border:1px solid transparent;
}
.toc a:hover{background:rgba(37,99,235,.08);border-color:rgba(37,99,235,.14)}
.toc p{margin-top:10px;font-size:12px;color:rgba(15,23,42,.60)}

/* Content cards */
.card{
  background:#ffffff;
  border:1px solid rgba(15,23,42,.10);
  border-radius:calc(var(--r) + 8px);
  box-shadow:0 12px 28px rgba(2,6,23,.06);
  padding:16px;
}
.card h2{font-size:20px;margin-bottom:10px}
.card p{font-size:14px;color:rgba(15,23,42,.74)}
.muted{color:var(--muted2)}

.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}

.pill{
  padding:12px;border-radius:18px;
  background:linear-gradient(135deg, rgba(6,182,212,.10), rgba(163,230,53,.10));
  border:1px solid rgba(15,23,42,.10);
}
.pill strong{display:block;font-size:14px;margin-bottom:4px}
.pill span{display:block;font-size:13px;color:rgba(15,23,42,.72)}

/* Timeline */
.timeline{position:relative;margin-top:12px;padding-left:18px;display:grid;gap:10px}
.timeline::before{
  content:"";
  position:absolute;left:7px;top:4px;bottom:4px;
  width:2px;border-radius:999px;
  background:linear-gradient(180deg,var(--cyan),var(--lime));
}
.titem{
  position:relative;
  padding:12px 12px 12px 14px;
  border-radius:18px;
  background:#ffffff;
  border:1px solid rgba(15,23,42,.10);
  box-shadow:0 12px 28px rgba(2,6,23,.06);
}
.titem::before{
  content:"";
  position:absolute;left:-16px;top:16px;
  width:14px;height:14px;border-radius:999px;
  background:linear-gradient(135deg,var(--cyan),var(--lime));
  box-shadow:0 10px 24px rgba(6,182,212,.22);
  border:2px solid #ffffff;
}
.titem h3{font-size:15px;margin-bottom:4px}
.titem p{font-size:14px;color:rgba(15,23,42,.72)}

/* Masonry-ish gallery (no JS) */
.masonry{
  column-count:3;
  column-gap:12px;
}
.mItem{
  break-inside:avoid;
  margin:0 0 12px;
  border-radius:calc(var(--r) + 8px);
  overflow:hidden;
  border:1px solid rgba(15,23,42,.10);
  box-shadow:0 12px 28px rgba(2,6,23,.06);
  background:#ffffff;
}
.mItem img{width:100%;height:170px;object-fit:cover}
.mPad{padding:12px}
.mPad strong{display:block;font-size:14px;margin-bottom:4px}
.mPad span{display:block;font-size:13px;color:rgba(15,23,42,.70)}

/* Form */
.form{
  display:grid;
  gap:10px;
  margin-top:12px;
}
.row2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.field label{display:block;font-size:13px;font-weight:900;margin-bottom:4px}
.field input,.field select,.field textarea{
  width:100%;
  padding:10px 12px;
  border-radius:18px;
  border:1px solid rgba(15,23,42,.14);
  outline:none;
  background:#ffffff;
  font-size:14px;
  transition:box-shadow .18s ease, border-color .18s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(6,182,212,.55);
  box-shadow:0 0 0 3px rgba(6,182,212,.16);
}

/* Footer */
.footer{
  margin-top:22px;
  background:linear-gradient(180deg,#0b1020,#0b0f18);
  color:rgba(255,255,255,.86);
  border-top:1px solid rgba(255,255,255,.10);
}
.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,.8fr);
  gap:12px;
  padding:22px 0 16px;
}
.footer h4{font-size:14px;margin-bottom:8px;color:rgba(255,255,255,.92)}
.footer a{display:block;font-size:13px;padding:4px 0;color:rgba(255,255,255,.78)}
.footer a:hover{color:#ffffff;text-decoration:underline}
.footer p{font-size:13px;color:rgba(255,255,255,.72)}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.10);
  padding:10px 0 14px;
  font-size:12px;
  color:rgba(255,255,255,.60);
}

@media (max-width: 980px){
  .hero__grid{grid-template-columns:1fr}
  .shell{grid-template-columns:1fr}
  .toc{position:relative;top:auto}
  .grid3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .masonry{column-count:2}
  .footer__grid{grid-template-columns:1fr}
  .cta{display:none}
}

@media (max-width: 640px){
  .hero h1{font-size:28px}
  .grid2,.grid3{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr}
  .masonry{column-count:1}
}