/* ================================================
   智慧体育系统技术分析站点 - 主样式
   设计风格：深色科技 + 玻璃拟态 + 渐变高亮
   ================================================ */

/* ── CSS 变量 ────────────────────────────────── */
:root {
  --bg-0:        #080e1a;
  --bg-1:        #0d1526;
  --bg-2:        #111f35;
  --bg-card:     rgba(16, 28, 52, 0.75);
  --bg-card-hov: rgba(22, 38, 68, 0.9);

  --blue:        #3b82f6;
  --blue-d:      #2563eb;
  --blue-l:      #60a5fa;
  --cyan:        #06b6d4;
  --cyan-l:      #67e8f9;
  --purple:      #8b5cf6;
  --purple-l:    #c4b5fd;
  --green:       #10b981;
  --green-l:     #6ee7b7;
  --orange:      #f59e0b;
  --orange-l:    #fcd34d;
  --red:         #ef4444;
  --red-l:       #fca5a5;

  --txt-1:   #f1f5f9;
  --txt-2:   #94a3b8;
  --txt-3:   #4b5563;

  --border:   rgba(59, 130, 246, 0.18);
  --border-b: rgba(59, 130, 246, 0.45);

  --r:    12px;
  --r-sm:  8px;
  --r-xs:  5px;
  --shadow: 0 4px 28px rgba(0,0,0,0.5);
  --glow:   0 0 32px rgba(59,130,246,0.12);
  --trans:  all 0.3s cubic-bezier(0.4,0,0.2,1);

  --mono: 'Cascadia Code','Fira Code','Consolas',monospace;
}

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

html { scroll-behavior:smooth; scroll-padding-top:68px; }

body {
  font-family: -apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  background: var(--bg-0);
  color: var(--txt-1);
  line-height: 1.65;
  overflow-x: hidden;
}

img { max-width:100%; display:block; }
a   { color:var(--blue-l); text-decoration:none; }
a:hover { text-decoration:underline; }

/* ── 自定义滚动条 ─────────────────────────────── */
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background:var(--bg-1); }
::-webkit-scrollbar-thumb { background:var(--blue-d); border-radius:3px; }

/* ── 进度条 ──────────────────────────────────── */
#progress-bar {
  position:fixed; top:0; left:0; height:3px; width:0;
  background:linear-gradient(90deg,var(--cyan),var(--blue),var(--purple));
  z-index:9999; transition:width .1s linear;
  box-shadow: 0 0 8px rgba(59,130,246,0.6);
}

/* ── 导航栏 ──────────────────────────────────── */
.navbar {
  position:fixed; top:0; left:0; right:0;
  height:64px; z-index:1000;
  background:rgba(8,14,26,0.82);
  backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid var(--border);
  transition:var(--trans);
}
.navbar.scrolled {
  background:rgba(8,14,26,0.96);
  border-bottom-color:var(--border-b);
  box-shadow:0 2px 20px rgba(0,0,0,0.4);
}
.nav-wrap {
  max-width:1280px; margin:0 auto;
  padding:0 24px; height:100%;
  display:flex; align-items:center; justify-content:space-between;
}
.nav-logo {
  display:flex; align-items:center; gap:10px;
  font-size:.95rem; font-weight:700; color:var(--txt-1);
}
.nav-logo .ico {
  width:34px; height:34px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  border-radius:9px; display:flex; align-items:center;
  justify-content:center; font-size:17px; flex-shrink:0;
}
.nav-links { display:flex; list-style:none; gap:2px; }
.nav-links a {
  display:block; padding:6px 13px;
  color:var(--txt-2); font-size:.84rem;
  border-radius:var(--r-sm); transition:var(--trans);
}
.nav-links a:hover,
.nav-links a.active {
  color:var(--txt-1);
  background:rgba(59,130,246,0.11);
}
.nav-links a.active { color:var(--blue-l); }
.nav-toggle {
  display:none; background:none;
  border:1px solid var(--border); border-radius:var(--r-sm);
  padding:6px 10px; color:var(--txt-2);
  cursor:pointer; font-size:1.2rem;
}

/* ── 容器 ────────────────────────────────────── */
.wrap { max-width:1280px; margin:0 auto; padding:0 24px; }

/* ── Section 通用 ────────────────────────────── */
.sec { padding:88px 0; }
.sec-alt { background:linear-gradient(180deg,transparent,rgba(59,130,246,0.03),transparent); }

.sec-label {
  display:inline-flex; align-items:center; gap:6px;
  font-size:.72rem; font-weight:700;
  text-transform:uppercase; letter-spacing:.1em;
  color:var(--cyan); margin-bottom:12px;
}
.sec-label::before {
  content:''; width:20px; height:2px;
  background:var(--cyan); border-radius:1px;
}
.sec-title {
  font-size:clamp(1.7rem,3.2vw,2.3rem);
  font-weight:800; line-height:1.2; margin-bottom:14px;
  background:linear-gradient(135deg,var(--txt-1) 40%,var(--blue-l));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.sec-sub {
  color:var(--txt-2); font-size:.97rem;
  max-width:640px; line-height:1.75; margin-bottom:48px;
}

/* ── Hero ────────────────────────────────────── */
.hero {
  min-height:100vh; display:flex;
  align-items:center; padding-top:64px;
  position:relative; overflow:hidden;
}
.hero::before {
  content:''; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(ellipse 90% 65% at 50% -5%,  rgba(59,130,246,.11) 0%,transparent 70%),
    radial-gradient(ellipse 45% 55% at 85% 45%,  rgba(6,182,212,.07)  0%,transparent 60%),
    radial-gradient(ellipse 40% 45% at 15% 80%,  rgba(139,92,246,.07) 0%,transparent 60%);
}
.hero::after {
  content:''; position:absolute; inset:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(59,130,246,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(59,130,246,.035) 1px,transparent 1px);
  background-size:52px 52px;
}
.hero-inner { position:relative; z-index:1; }
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 16px;
  background:rgba(59,130,246,.1);
  border:1px solid rgba(59,130,246,.3);
  border-radius:50px; font-size:.78rem;
  color:var(--blue-l); margin-bottom:24px;
}
.hero-title {
  font-size:clamp(2.2rem,5.5vw,3.8rem);
  font-weight:900; line-height:1.15; margin-bottom:20px;
}
.grad-text {
  background:linear-gradient(135deg,var(--blue-l),var(--cyan-l),var(--purple-l));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc {
  font-size:1.05rem; color:var(--txt-2);
  max-width:580px; line-height:1.75; margin-bottom:48px;
}
.hero-stats {
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:14px; max-width:820px;
}
.stat-card {
  padding:18px 12px; text-align:center;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r);
  backdrop-filter:blur(8px); transition:var(--trans);
}
.stat-card:hover { border-color:var(--border-b); transform:translateY(-3px); box-shadow:var(--glow); }
.stat-num {
  font-size:1.7rem; font-weight:800; line-height:1; margin-bottom:5px;
  background:linear-gradient(135deg,var(--blue-l),var(--cyan));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-lbl { font-size:.7rem; color:var(--txt-3); line-height:1.3; }

/* ── 卡片 ────────────────────────────────────── */
.card {
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r); padding:24px;
  backdrop-filter:blur(8px); transition:var(--trans);
}
.card:hover { border-color:var(--border-b); background:var(--bg-card-hov); box-shadow:var(--glow); transform:translateY(-2px); }
.card-head {
  display:flex; align-items:center; gap:10px;
  margin-bottom:18px;
}
.card-icon {
  width:36px; height:36px; border-radius:9px;
  display:flex; align-items:center;
  justify-content:center; font-size:18px; flex-shrink:0;
}
.ci-blue   { background:rgba(59,130,246,.15); }
.ci-green  { background:rgba(16,185,129,.15); }
.ci-purple { background:rgba(139,92,246,.15); }
.ci-orange { background:rgba(245,158,11,.15); }
.ci-cyan   { background:rgba(6,182,212,.15); }
.card-title { font-size:.95rem; font-weight:600; }

/* ── 架构图 ──────────────────────────────────── */
.arch-stack {
  display:flex; flex-direction:column;
  align-items:stretch; gap:0;
  max-width:820px; margin:0 auto;
}
.arch-layer {
  padding:22px 28px; border-radius:var(--r);
  border:1px solid; position:relative;
}
.arch-layer.al-server {
  background:rgba(59,130,246,.07);
  border-color:rgba(59,130,246,.35);
}
.arch-layer.al-device {
  background:rgba(16,185,129,.07);
  border-color:rgba(16,185,129,.35);
}
.arch-layer.al-mobile {
  background:rgba(139,92,246,.07);
  border-color:rgba(139,92,246,.35);
}
.al-head {
  display:flex; align-items:center; gap:8px;
  font-size:.88rem; font-weight:700; margin-bottom:14px;
}
.al-server .al-head { color:var(--blue-l); }
.al-device .al-head { color:var(--green-l); }
.al-mobile .al-head { color:var(--purple-l); }

.al-chips { display:flex; flex-wrap:wrap; gap:8px; }
.chip {
  padding:4px 12px; border-radius:20px;
  font-size:.76rem; font-weight:500; border:1px solid;
}
.al-server .chip {
  background:rgba(59,130,246,.1);
  border-color:rgba(59,130,246,.3); color:var(--blue-l);
}
.al-device .chip {
  background:rgba(16,185,129,.1);
  border-color:rgba(16,185,129,.3); color:var(--green-l);
}
.al-mobile .chip {
  background:rgba(139,92,246,.1);
  border-color:rgba(139,92,246,.3); color:var(--purple-l);
}

.arch-conn {
  display:flex; flex-direction:column;
  align-items:center; padding:6px 0; gap:2px;
}
.conn-line {
  width:2px; height:22px;
  background:linear-gradient(to bottom,
    rgba(100,116,139,.6), rgba(100,116,139,.1));
}
.conn-label {
  font-size:.7rem; color:var(--txt-3);
  background:var(--bg-0); padding:2px 10px;
  border-radius:10px; border:1px solid rgba(100,116,139,.2);
  white-space:nowrap;
}
.device-modules {
  display:flex; align-items:center;
  gap:8px; flex-wrap:wrap;
}
.dev-mod {
  padding:8px 16px;
  background:rgba(16,185,129,.08);
  border:1px solid rgba(16,185,129,.3);
  border-radius:var(--r-sm);
  font-size:.8rem; color:var(--green-l); text-align:center;
}
.dev-mod small {
  display:block; font-size:.68rem;
  color:rgba(110,231,183,.6); margin-top:2px;
}
.dev-arrow { color:rgba(100,116,139,.5); font-size:1.3rem; }

/* ── 标签页 ──────────────────────────────────── */
.tabs-wrap { display:flex; flex-direction:column; }
.tab-nav {
  display:flex; flex-wrap:wrap; gap:2px;
  border-bottom:1px solid var(--border);
  margin-bottom:32px;
}
.tab-btn {
  padding:10px 20px; background:transparent;
  border:none; border-bottom:2px solid transparent;
  margin-bottom:-1px; color:var(--txt-2);
  font-size:.84rem; font-weight:500;
  cursor:pointer; transition:var(--trans);
  border-radius:var(--r-sm) var(--r-sm) 0 0;
  display:flex; align-items:center; gap:6px;
}
.tab-btn:hover { color:var(--txt-1); background:rgba(59,130,246,.05); }
.tab-btn.on {
  color:var(--blue-l);
  border-bottom-color:var(--blue);
  background:rgba(59,130,246,.07);
}
.tab-pane { display:none; }
.tab-pane.on {
  display:block;
  animation:fadeUp .25s ease;
}
@keyframes fadeUp {
  from { opacity:0; transform:translateY(8px); }
  to   { opacity:1; transform:translateY(0); }
}

/* ── 技术徽章网格 ─────────────────────────────── */
.tech-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(270px,1fr));
  gap:14px;
}
.tech-block { padding:18px 20px; }
.tech-block-title {
  font-size:.72rem; font-weight:700;
  color:var(--txt-3); text-transform:uppercase;
  letter-spacing:.08em; margin-bottom:10px;
}
.badges { display:flex; flex-wrap:wrap; gap:7px; }
.badge {
  padding:3px 10px; border-radius:20px;
  font-size:.76rem; font-weight:500; border:1px solid transparent;
}
.b-blue   { background:rgba(59,130,246,.12); border-color:rgba(59,130,246,.3);  color:var(--blue-l); }
.b-cyan   { background:rgba(6,182,212,.12);  border-color:rgba(6,182,212,.3);   color:var(--cyan-l); }
.b-green  { background:rgba(16,185,129,.12); border-color:rgba(16,185,129,.3);  color:var(--green-l); }
.b-purple { background:rgba(139,92,246,.12); border-color:rgba(139,92,246,.3);  color:var(--purple-l); }
.b-orange { background:rgba(245,158,11,.12); border-color:rgba(245,158,11,.3);  color:var(--orange-l); }
.b-red    { background:rgba(239,68,68,.12);  border-color:rgba(239,68,68,.3);   color:var(--red-l); }

/* ── 硬件规格表 ──────────────────────────────── */
.spec-table { width:100%; border-collapse:collapse; font-size:.86rem; }
.spec-table th {
  padding:10px 16px; text-align:left;
  font-size:.72rem; font-weight:700; color:var(--txt-3);
  text-transform:uppercase; letter-spacing:.06em;
  border-bottom:1px solid var(--border);
  background:rgba(0,0,0,.2);
}
.spec-table td {
  padding:11px 16px; border-bottom:1px solid rgba(30,58,95,.3);
  color:var(--txt-2); vertical-align:top;
}
.spec-table td:first-child { color:var(--txt-1); font-weight:500; white-space:nowrap; }
.spec-table tr:hover td { background:rgba(59,130,246,.03); }
.spec-tag {
  display:inline-block; padding:2px 8px;
  background:rgba(59,130,246,.1); border-radius:10px;
  color:var(--blue-l); font-size:.75rem; margin-left:6px;
}

/* ── 存储层级 ────────────────────────────────── */
.storage-tiers {
  display:flex; flex-direction:column;
  gap:0; max-width:680px;
}
.tier {
  padding:20px 24px; border-radius:var(--r);
  border:1px solid; position:relative;
}
.tier::after {
  content:'↓';
  position:absolute; bottom:-18px; left:50%;
  transform:translateX(-50%);
  color:var(--txt-3); font-size:1.2rem;
  background:var(--bg-0); padding:0 6px; z-index:1;
}
.tier:last-child::after { display:none; }
.tier + .tier { margin-top:20px; }

.tier.t-cam    { background:rgba(245,158,11,.05); border-color:rgba(245,158,11,.3); }
.tier.t-dev    { background:rgba(16,185,129,.05);  border-color:rgba(16,185,129,.3); }
.tier.t-srv    { background:rgba(59,130,246,.05);  border-color:rgba(59,130,246,.3); }
.tier.t-cloud  { background:rgba(139,92,246,.05); border-color:rgba(139,92,246,.3); }

.tier-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.tier-title { font-size:.92rem; font-weight:600; }
.tier.t-cam   .tier-title { color:var(--orange-l); }
.tier.t-dev   .tier-title { color:var(--green-l); }
.tier.t-srv   .tier-title { color:var(--blue-l); }
.tier.t-cloud .tier-title { color:var(--purple-l); }
.tier-size { font-size:.72rem; padding:2px 8px; border-radius:10px; background:rgba(0,0,0,.3); color:var(--txt-3); }
.tier-chips { display:flex; flex-wrap:wrap; gap:7px; }

/* ── 同步流程 ────────────────────────────────── */
.sync-flow {
  display:flex; align-items:center;
  flex-wrap:wrap; gap:4px; justify-content:center;
  padding:20px 0;
}
.sf-box {
  padding:11px 16px; border-radius:var(--r-sm);
  font-size:.82rem; font-weight:500; text-align:center;
  min-width:100px; border:1px solid; transition:var(--trans);
}
.sf-box:hover { transform:translateY(-2px); }
.sf-start   { background:rgba(16,185,129,.1);  border-color:rgba(16,185,129,.4);  color:var(--green-l); }
.sf-db      { background:rgba(245,158,11,.1);  border-color:rgba(245,158,11,.4);  color:var(--orange-l); }
.sf-net     { background:rgba(139,92,246,.1);  border-color:rgba(139,92,246,.4);  color:var(--purple-l); }
.sf-http    { background:rgba(59,130,246,.1);  border-color:rgba(59,130,246,.4);  color:var(--blue-l); }
.sf-ok      { background:rgba(16,185,129,.1);  border-color:rgba(16,185,129,.4);  color:var(--green-l); }
.sf-queue   { background:rgba(245,158,11,.1);  border-color:rgba(245,158,11,.4);  color:var(--orange-l); }
.sf-retry   { background:rgba(239,68,68,.1);   border-color:rgba(239,68,68,.4);   color:var(--red-l); }
.sf-arrow { color:var(--txt-3); font-size:1.3rem; flex-shrink:0; }
.sf-arrow.down { transform:rotate(90deg); }
.sf-sub { font-size:.68rem; color:var(--txt-3); text-align:center; margin-top:2px; }

/* ── 状态机 ──────────────────────────────────── */
.state-grid {
  display:flex; flex-wrap:wrap;
  gap:10px; max-width:560px;
}
.st-node {
  padding:9px 18px; border-radius:var(--r-sm);
  border:1px solid; font-size:.82rem; font-weight:600;
  text-align:center; flex:1; min-width:100px;
}
.st-0 { border-color:rgba(245,158,11,.4);  color:var(--orange-l); background:rgba(245,158,11,.08); }
.st-1 { border-color:rgba(59,130,246,.4);  color:var(--blue-l);   background:rgba(59,130,246,.08); }
.st-2 { border-color:rgba(16,185,129,.4);  color:var(--green-l);  background:rgba(16,185,129,.08); }
.st-3 { border-color:rgba(239,68,68,.4);   color:var(--red-l);    background:rgba(239,68,68,.08); }
.st-4 { border-color:rgba(139,92,246,.4);  color:var(--purple-l); background:rgba(139,92,246,.08); }
.st-sub { font-size:.68rem; font-weight:400; color:inherit; opacity:.7; display:block; margin-top:2px; }
.st-trans {
  display:flex; flex-direction:column;
  gap:4px; font-size:.72rem; color:var(--txt-3);
  padding:4px 0; border-left:1px dashed var(--border);
  padding-left:12px; margin-left:8px;
}
.st-arrow-row { display:flex; align-items:center; gap:6px; }
.st-arrow-row span:first-child { color:var(--txt-2); font-size:.8rem; }

/* ── 代码块 ──────────────────────────────────── */
.code-wrap {
  border-radius:var(--r); overflow:hidden;
  border:1px solid rgba(59,130,246,.15);
  box-shadow:0 8px 32px rgba(0,0,0,.4);
}
.code-hdr {
  display:flex; align-items:center;
  justify-content:space-between;
  padding:10px 16px;
  background:#0d1117;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.code-dots { display:flex; gap:6px; }
.dot { width:12px; height:12px; border-radius:50%; }
.dot.r { background:#ff5f57; }
.dot.y { background:#febc2e; }
.dot.g { background:#28c840; }
.code-file {
  font-size:.78rem; color:var(--txt-3);
  font-family:var(--mono);
  display:flex; align-items:center; gap:6px;
}
.code-file .fi-icon { font-size:.9rem; }
.copy-btn {
  padding:4px 11px;
  background:rgba(59,130,246,.1);
  border:1px solid rgba(59,130,246,.25);
  border-radius:var(--r-xs);
  color:var(--blue-l); font-size:.73rem;
  cursor:pointer; transition:var(--trans);
  display:flex; align-items:center; gap:4px;
}
.copy-btn:hover { background:rgba(59,130,246,.2); border-color:rgba(59,130,246,.4); }
.copy-btn.copied { color:var(--green-l); background:rgba(16,185,129,.1); border-color:rgba(16,185,129,.3); }

.code-wrap pre {
  margin:0 !important; border-radius:0 !important;
  max-height:500px; overflow:auto !important;
  font-size:.82rem !important; line-height:1.65 !important;
}
.code-wrap pre code { font-family:var(--mono) !important; }
.hljs { background:#0d1117 !important; padding:22px !important; }

/* ── 终端输出 ─────────────────────────────────── */
.terminal {
  background:#050a05;
  border:1px solid #1a2d1a;
  border-radius:var(--r); overflow:hidden;
  font-family:var(--mono); font-size:.82rem; line-height:1.7;
}
.term-hdr {
  display:flex; align-items:center; gap:8px;
  padding:10px 16px; background:#0a130a;
  border-bottom:1px solid #1a2d1a;
}
.term-title { font-size:.76rem; color:#4ade80; flex:1; text-align:center; }
.term-body {
  padding:16px 22px; max-height:480px; overflow-y:auto; color:#d1fae5;
}
.t-line { display:block; margin-bottom:1px; }
.tt { color:#2d4a2d; }          /* timestamp */
.tm { color:#3d5c3d; min-width:88px; display:inline-block; } /* module */
.ts { color:#4ade80; }          /* success */
.tw { color:#fbbf24; }          /* warning */
.te { color:#f87171; }          /* error */
.ti { color:#60a5fa; }          /* info */
.th { color:#a78bfa; }          /* highlight */
.tn { color:#d1fae5; }          /* normal */
.tsep { color:#1a2d1a; }        /* separator */
.tsec {                         /* section header */
  color:#e2e8e2; font-weight:700;
  margin:8px 0 4px; display:block;
}
.tstat { color:#34d399; }       /* stats */

/* ── 详情列表 ─────────────────────────────────── */
.detail-list { display:flex; flex-direction:column; gap:12px; }
.detail-item {
  display:flex; gap:14px; padding:14px 16px;
  background:rgba(0,0,0,.15); border-radius:var(--r-sm);
  border-left:3px solid var(--blue);
}
.detail-item.gi { border-left-color:var(--green); }
.detail-item.oi { border-left-color:var(--orange); }
.detail-item.pi { border-left-color:var(--purple); }
.detail-item.ri { border-left-color:var(--red); }
.di-icon { font-size:1.3rem; flex-shrink:0; padding-top:1px; }
.di-title { font-size:.9rem; font-weight:600; margin-bottom:4px; }
.di-text { font-size:.82rem; color:var(--txt-2); line-height:1.6; }
.di-text code {
  background:rgba(59,130,246,.1); padding:1px 5px;
  border-radius:4px; font-family:var(--mono);
  font-size:.78rem; color:var(--cyan-l);
}

/* ── 两列 / 三列 网格 ────────────────────────── */
.g2 { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.g3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }

/* ── 分割线 ──────────────────────────────────── */
.hr { height:1px; background:linear-gradient(90deg,transparent,var(--border),transparent); margin:40px 0; }

/* ── 滚动进入动画 ─────────────────────────────── */
.reveal { opacity:0; transform:translateY(28px); transition:opacity .65s ease,transform .65s ease; }
.reveal.in { opacity:1; transform:translateY(0); }

/* ── 页脚 ────────────────────────────────────── */
footer {
  padding:36px 0;
  border-top:1px solid var(--border);
  text-align:center;
}
.footer-name { font-size:.95rem; font-weight:700; color:var(--blue-l); margin-bottom:6px; }
.footer-info { font-size:.78rem; color:var(--txt-3); line-height:1.8; }

/* ── 响应式 ──────────────────────────────────── */
@media (max-width:1024px) {
  .hero-stats { grid-template-columns:repeat(3,1fr); }
}
@media (max-width:768px) {
  .nav-links { display:none; }
  .nav-links.open {
    display:flex; flex-direction:column;
    position:absolute; top:64px; left:0; right:0;
    background:rgba(8,14,26,.97);
    padding:12px; border-bottom:1px solid var(--border);
    z-index:999;
  }
  .nav-toggle { display:block; }
  .hero-stats { grid-template-columns:repeat(3,1fr); }
  .g2,.g3 { grid-template-columns:1fr; }
  .sync-flow { flex-direction:column; }
  .sf-arrow { transform:rotate(90deg); }
  .device-modules { flex-direction:column; align-items:flex-start; }
  .sec { padding:64px 0; }
  .tab-btn { padding:8px 12px; font-size:.8rem; }
}
@media (max-width:480px) {
  .hero-stats { grid-template-columns:repeat(2,1fr); }
  .stat-num { font-size:1.5rem; }
  .hero-title { font-size:2rem; }
}