/* ============================================================
   sections.css — 首页区块 A
   Hero（深色沉浸 + 点阵屏） / 指标 / 产品矩阵 / 技术栈 / 点阵模拟器
   ============================================================ */

/* ── Hero ─────────────────────────────────────────── */
.gb-hero{
  position:relative;overflow:hidden;
  background:var(--gb4-bg);color:var(--gb4-text);
  padding-block:clamp(3.5rem,8vw,6rem) clamp(4rem,8vw,7rem);
  min-height:clamp(620px,90vh,900px);
  display:flex;align-items:center;
}
.gb-hero__bg{position:absolute;inset:0;pointer-events:none}
.gb-hero__bg canvas{width:100%;height:100%;display:block}
.gb-hero__grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--hud-grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--hud-grid) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 30%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 30%,transparent 100%);
}
.gb-hero__glow{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 55% 45% at 22% 30%,rgba(255,107,26,.28),transparent 70%),
    radial-gradient(ellipse 45% 40% at 82% 62%,rgba(34,211,238,.14),transparent 70%);
}
.gb-hero__vig{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,8,16,.55),transparent 30%,transparent 70%,rgba(6,8,16,.75));
}
.gb-hero__in{
  position:relative;z-index:1;
  max-width:var(--gb-wide);margin-inline:auto;width:100%;
  padding-inline:clamp(1.25rem,4vw,2.5rem);
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:clamp(2rem,5vw,4rem);align-items:center;
}
.gb-hero__title{
  font-family:var(--gb-font-head);
  font-size:var(--fs-display);
  line-height:1.16;            /* 黑体中文大标题：比拉丁体略松 */
  letter-spacing:-.01em;
  color:var(--gb4-text);margin:0 0 var(--s-5);
  text-shadow:0 0 42px rgba(255,107,26,.18);
}
.gb-hero__title em{
  font-style:normal;color:var(--hud-led);
  text-shadow:0 0 30px rgba(255,107,26,.45);
}
.gb-hero__lead{
  font-size:var(--fs-lead);color:var(--gb4-text-2);
  max-width:52ch;margin:0 0 var(--s-6);
}
.gb-hero__actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-bottom:var(--s-8)}

.gb-hero__readout{
  display:flex;gap:clamp(1rem,3vw,2.25rem);flex-wrap:wrap;
  padding-top:var(--s-5);border-top:1px solid var(--gb4-border);
}
.gb-hero__ro{display:flex;flex-direction:column;gap:.15rem}
.gb-hero__ro dt{
  font-family:var(--gb-font-label);font-size:9px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--gb4-text-2);
}
.gb-hero__ro dd{
  margin:0;font-family:var(--gb-font-mono);font-size:clamp(1rem,1.6vw,1.25rem);
  color:var(--gb4-text);font-variant-numeric:tabular-nums;
}

.gb-hero__scroll{
  position:absolute;bottom:1.5rem;left:50%;transform:translateX(-50%);
  z-index:1;display:flex;flex-direction:column;align-items:center;gap:.55rem;
  font-family:var(--gb-font-mono);font-size:9px;letter-spacing:.24em;
  color:var(--gb4-text-2);
}
.gb-hero__scroll i{
  width:1px;height:38px;
  background:linear-gradient(var(--hud-led),transparent);
  animation:scrollPulse 1.9s ease-in-out infinite;
  transform-origin:top;
}
@keyframes scrollPulse{
  0%,100%{opacity:.25;transform:scaleY(.5)}
  50%{opacity:1;transform:scaleY(1)}
}

/* ── 点阵屏装置（Hero 与模拟器共用） ──────────────── */
.dmx{
  position:relative;
  background:linear-gradient(160deg,#0c1424,#060a12);
  border:1px solid var(--gb4-border-2);border-radius:var(--gb-radius);
  padding:clamp(1rem,2.5vw,1.5rem);
  box-shadow:0 34px 90px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.05);
}
.dmx__top{
  display:flex;align-items:center;justify-content:space-between;
  gap:1rem;margin-bottom:.9rem;
}
.dmx__brand{
  font-family:var(--gb-font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--gb4-text-2);
}
.dmx__led{display:flex;gap:.35rem;align-items:center}
.dmx__led i{
  width:6px;height:6px;border-radius:50%;
  background:var(--hud-led);box-shadow:var(--hud-glow);
  animation:ledBlink 2.2s ease-in-out infinite;
}
.dmx__led i:nth-child(2){animation-delay:.35s}
.dmx__led i:nth-child(3){animation-delay:.7s;background:rgba(255,255,255,.25);box-shadow:none}
@keyframes ledBlink{0%,100%{opacity:1}50%{opacity:.35}}

.dmx__screen{
  position:relative;overflow:hidden;
  background:#04070d;border-radius:12px;
  border:1px solid rgba(255,255,255,.07);
  box-shadow:inset 0 0 46px rgba(0,0,0,.85);
  padding:clamp(.85rem,2vw,1.25rem);
}
.dmx__screen canvas{width:100%;height:auto;display:block}
.dmx__scanlines{
  position:absolute;inset:0;pointer-events:none;border-radius:12px;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.045) 0 1px,transparent 1px 4px);
}
.dmx__glare{
  position:absolute;inset:0;pointer-events:none;border-radius:12px;
  background:linear-gradient(118deg,rgba(255,255,255,.07),transparent 42%);
}
.dmx__rows{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  margin-top:.85rem;
  font-family:var(--gb-font-mono);font-size:10px;letter-spacing:.12em;
  color:var(--gb4-text-2);
}
.dmx__ctl{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:1.1rem}
.dmx__btn{
  min-height:var(--gb-tap);padding:.5rem 1rem;
  border-radius:var(--gb-pill);border:1px solid var(--gb4-border-2);
  background:var(--gb4-surface);color:var(--gb4-text-2);
  font-family:var(--gb-font-label);font-size:var(--fs-xs);font-weight:700;
  letter-spacing:.08em;cursor:pointer;
  transition:color var(--t-fast),border-color var(--t-fast),background var(--t-fast);
}
.dmx__btn:hover{border-color:var(--hud-led);color:var(--hud-led)}
.dmx__btn.is-on{background:var(--hud-led);border-color:var(--hud-led);color:#04222b}
.dmx__floor{display:flex;align-items:center;gap:.8rem;margin-top:1rem}
.dmx__floor label{
  font-family:var(--gb-font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--gb4-text-2);flex-shrink:0;
}
.dmx__floor input[type=range]{
  flex:1;min-width:120px;accent-color:var(--hud-led);min-height:var(--gb-tap);
}

/* ── 指标统计 ─────────────────────────────────────── */
.gb-stats-section{
  background:var(--gb4-bg-2);color:var(--gb4-text);
  padding-block:var(--sec-pad);position:relative;overflow:hidden;
}
.gb-stats-section::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(var(--hud-grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--hud-grid) 1px,transparent 1px);
  background-size:48px 48px;
}
.gb-stats{
  position:relative;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:1px;background:var(--gb4-border);
  border:1px solid var(--gb4-border);border-radius:var(--gb-radius);
  overflow:hidden;
}
.gb-stat{
  background:var(--gb4-bg-2);padding:clamp(1.25rem,3vw,1.9rem);
  display:flex;flex-direction:column;gap:.25rem;
  transition:background var(--t-base);
}
.gb-stat:hover{background:var(--gb4-bg-3)}
.gb-stat__v{
  font-family:var(--gb-font-mono);font-weight:600;
  font-size:clamp(1.9rem,3.6vw,2.9rem);line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#ffffff,#a9e9ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.gb-stat__line{display:flex;align-items:baseline;gap:.14rem}
.gb-stat__suf{
  font-family:var(--gb-font-mono);font-weight:600;
  font-size:clamp(.95rem,1.6vw,1.3rem);color:#a9e9ff;
}
.gb-stat__l{font-size:var(--fs-sm);font-weight:600;color:var(--gb4-text);margin-top:.35rem}
.gb-stat__d{font-size:var(--fs-xs);color:var(--gb4-text-2)}

/* ── 筛选胶囊 ─────────────────────────────────────── */
.gb-chips{display:flex;gap:.55rem;flex-wrap:wrap;margin-bottom:2rem}
.gb-chip{
  min-height:var(--gb-tap);padding:.5rem 1.1rem;
  border-radius:var(--gb-pill);border:1px solid var(--gb-border);
  background:#F7FAFD;color:#0A0E18;
  font-family:var(--gb-font-label);font-size:var(--fs-xs);font-weight:700;
  letter-spacing:.06em;cursor:pointer;
  transition:all var(--t-fast);
}
.gb-chip:hover{border-color:var(--gb-cyan);color:var(--gb-ink-link)}
.gb-chip.is-on{
  /* 同 .btn--primary：白字压琥珀仅 2.85:1；改深墨 6.57:1 ✅。
     且本组件非选中态本就是深字压浅底（#0A0E18 on #F7FAFD），一致。 */
  background:var(--gb-ink-link);border-color:var(--gb-ink-link);color:#0B1220;
  box-shadow:0 6px 18px rgba(255,107,26,.28);
}

/* ── 卡片系统 ─────────────────────────────────────── */
.gb-cards{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(285px,1fr));
  gap:1.5rem;
}
.gb-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--gb-white);border:1px solid var(--gb-border);
  border-radius:var(--gb-radius);overflow:hidden;
  transition:transform var(--t-base),box-shadow var(--t-base),border-color var(--t-base);
}
.gb-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--gb-shadow-lg);
  border-color:rgba(34,211,238,.45);
}
.gb-card__media{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:var(--gb-media);
  display:grid;place-items:center;
}
.gb-card__media::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.gb-card__glyph{
  position:relative;z-index:1;
  font-family:var(--gb-font-mono);font-size:clamp(1.6rem,3vw,2.2rem);
  font-weight:600;color:#fff;letter-spacing:.02em;
  text-shadow:0 0 26px rgba(255,107,26,.5);
}
.gb-card__code{
  position:absolute;top:.8rem;left:.8rem;z-index:2;
  font-family:var(--gb-font-mono);font-size:10px;letter-spacing:.14em;
  color:#fff;background:rgba(6,8,16,.5);
  padding:.25rem .55rem;border-radius:5px;
}
.gb-card__badges{position:absolute;top:.75rem;right:.75rem;z-index:2;display:flex;gap:.3rem;flex-wrap:wrap;justify-content:flex-end}
.gb-card__badge{
  font-family:var(--gb-font-label);font-size:9px;font-weight:700;letter-spacing:.1em;
  padding:.25rem .55rem;border-radius:var(--gb-pill);
  background:var(--hud-led);color:#04222b;
}
.gb-card__body{
  padding:1.25rem;display:flex;flex-direction:column;gap:.5rem;flex:1;
}
.gb-card__cat{
  font-family:var(--gb-font-label);font-size:9px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--gb-text-muted);
}
.gb-card__title{font-family:var(--gb-font-head);font-size:1.12rem;color:var(--gb-heading);margin:0}
.gb-card__text{font-size:var(--fs-sm);color:var(--gb-text-muted);margin:0}
.gb-card__specs{display:flex;gap:.35rem;flex-wrap:wrap;margin-top:auto;padding-top:.85rem}
.gb-card__spec{
  font-family:var(--gb-font-mono);font-size:10px;color:var(--gb-text-muted);
  border:1px solid var(--gb-border);border-radius:6px;padding:.2rem .45rem;
}
.gb-card__more{
  /* 红线⑥：触控目标 ≥44px。原高 27px；用 min-height 兜底（行内块居中），
     不改变视觉位置与字号。 */
  display:inline-flex;align-items:center;gap:.4rem;margin-top:.85rem;
  min-height:44px;
  font-size:var(--fs-sm);font-weight:600;color:var(--gb-ink-link);
}
.gb-card__more svg{transition:transform var(--t-base)}
.gb-card:hover .gb-card__more svg{transform:translateX(4px)}

/* ── 技术栈分层 ───────────────────────────────────── */
.gb-stack{display:flex;flex-direction:column;gap:.7rem}
.gb-layer{
  display:grid;grid-template-columns:112px 1fr;gap:1.25rem;align-items:center;
  background:var(--gb-white);border:1px solid var(--gb-border);
  border-radius:var(--gb-radius);padding:1.05rem 1.4rem;
  transition:transform var(--t-base),border-color var(--t-base),box-shadow var(--t-base);
}
.gb-layer:hover{
  transform:translateX(7px);
  border-color:rgba(34,211,238,.5);
  box-shadow:var(--gb-shadow);
}
.gb-layer__k{
  font-family:var(--gb-font-label);font-size:10px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--gb-ink-link);
}
.gb-layer__t{font-family:var(--gb-font-head);font-size:1.12rem;color:var(--gb-heading);margin:.15rem 0 0}
.gb-layer__items{display:flex;gap:.45rem;flex-wrap:wrap}
.gb-layer__item{
  font-size:var(--fs-xs);color:var(--gb-text-muted);
  border:1px solid var(--gb-border);border-radius:var(--gb-pill);
  padding:.3rem .75rem;
  transition:color var(--t-fast),border-color var(--t-fast);
}
.gb-layer:hover .gb-layer__item{color:var(--gb-text);border-color:var(--gb-cyan)}

/* ── 点阵模拟器区块 ───────────────────────────────── */
.gb-sim{
  background:var(--gb4-bg);color:var(--gb4-text);
  padding-block:var(--sec-pad);position:relative;overflow:hidden;
}
.gb-sim::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
  background-image:
    linear-gradient(var(--hud-grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--hud-grid) 1px,transparent 1px);
  background-size:50px 50px;
}
.gb-sim__grid{
  position:relative;
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:clamp(2rem,5vw,3.5rem);align-items:center;
}
.gb-sim__list{display:flex;flex-direction:column;gap:.85rem;margin-top:1.75rem}
.gb-sim__row{
  display:flex;align-items:baseline;gap:.85rem;
  padding-bottom:.85rem;border-bottom:1px solid var(--gb4-border);
}
.gb-sim__row b{
  font-family:var(--gb-font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--hud-led);flex-shrink:0;width:42px;
}
.gb-sim__row span{font-size:var(--fs-sm);color:var(--gb4-text-2)}
.gb-sim__row strong{display:block;color:var(--gb4-text);font-size:var(--fs-sm);margin-bottom:.15rem}

/* ── 响应式 ───────────────────────────────────────── */
@media (max-width:1024px){
  .gb-hero__in{grid-template-columns:1fr;gap:2.5rem}
  .gb-sim__grid{grid-template-columns:1fr}
  .gb-layer{grid-template-columns:1fr;gap:.5rem}
}
@media (max-width:640px){
  .gb-hero{min-height:auto;padding-block:5rem 4rem}
  .gb-hero__scroll{display:none}
  .gb-cards{grid-template-columns:1fr}
  .dmx__rows{font-size:9px}
}