/* ============================================================
   TTQ-JXC 宣传站 · 共享设计系统（浅色）
   无框架、无构建；各页引用本文件即可。
   ============================================================ */

:root{
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --bg-softer:#eef3f9;
  --ink:#0f1b2d;
  --ink-2:#3a4a63;
  --ink-3:#6b7c95;
  --line:#e3e9f2;
  --line-2:#d4deeb;

  --brand:#2563eb;      /* 主蓝 */
  --brand-600:#1d4ed8;
  --brand-050:#eaf1ff;
  --teal:#0d9488;       /* 辅助青 */
  --teal-050:#e6f5f2;
  --amber:#d97706;
  --violet:#7c3aed;
  --rose:#e11d48;
  --green:#16a34a;

  --radius:16px;
  --radius-sm:10px;
  --radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(16,29,54,.06),0 1px 3px rgba(16,29,54,.07);
  --shadow:0 6px 20px rgba(16,29,54,.08),0 2px 6px rgba(16,29,54,.05);
  --shadow-lg:0 20px 48px rgba(16,29,54,.14);

  --maxw:1180px;
  --font:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans CJK SC",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  line-height:1.65;-webkit-font-smoothing:antialiased;font-size:16px;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(2rem,4.4vw,3.25rem)}
h2{font-size:clamp(1.6rem,3vw,2.25rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section--soft{background:var(--bg-soft)}
.section--softer{background:var(--bg-softer)}
.center{text-align:center}
.muted{color:var(--ink-3)}
.lead{font-size:1.12rem;color:var(--ink-2);max-width:640px}

/* eyebrow / section header */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.8rem;
  letter-spacing:.08em;text-transform:uppercase;color:var(--brand);
  background:var(--brand-050);padding:6px 14px;border-radius:999px;margin-bottom:16px}
.eyebrow.teal{color:var(--teal);background:var(--teal-050)}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-head .lead{margin:12px auto 0}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:.98rem;padding:12px 24px;border-radius:12px;
  border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(37,99,235,.28)}
.btn--primary:hover{background:var(--brand-600);transform:translateY(-1px)}
.btn--ghost{background:#fff;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn--lg{padding:15px 30px;font-size:1.05rem}
.btn--sm{padding:8px 16px;font-size:.9rem;border-radius:10px}

/* topbar / nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:66px;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.15rem;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .mark{width:34px;height:34px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--teal));display:grid;place-items:center;color:#fff;font-size:1.05rem;font-weight:900;box-shadow:0 4px 12px rgba(37,99,235,.32)}
.brand small{display:block;font-size:.68rem;font-weight:600;color:var(--ink-3);letter-spacing:.02em;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{color:var(--ink-2);font-weight:600;font-size:.94rem;padding:8px 13px;border-radius:9px}
.nav-links a:hover{background:var(--bg-softer);color:var(--ink)}
.nav-links a.active{color:var(--brand);background:var(--brand-050)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line-2);
  border-radius:9px;width:42px;height:40px;font-size:1.3rem;cursor:pointer;color:var(--ink)}

/* hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1200px 520px at 78% -8%,#e7f0ff 0%,rgba(231,240,255,0) 60%),
  radial-gradient(1000px 480px at 8% 0%,#e6f5f2 0%,rgba(230,245,242,0) 55%),
  linear-gradient(180deg,#fff, #fbfdff)}
.hero-inner{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding:74px 0 78px}
.hero h1{margin-bottom:.35em}
.hero h1 .grad{background:linear-gradient(100deg,var(--brand),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:1.16rem;margin-bottom:26px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.chip{font-size:.85rem;font-weight:600;color:var(--ink-2);background:#fff;border:1px solid var(--line-2);
  padding:6px 13px;border-radius:999px;box-shadow:var(--shadow-sm)}

/* hero mock window */
.mock{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden}
.mock-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.mock-bar i{width:11px;height:11px;border-radius:50%;display:inline-block}
.mock-bar .dots{display:flex;gap:6px}
.mock-title{margin-left:8px;font-size:.82rem;color:var(--ink-3);font-weight:600}
.mock-body{padding:18px;display:grid;grid-template-columns:74px 1fr;gap:14px;min-height:320px}
.mock-side{display:flex;flex-direction:column;gap:9px;padding-top:4px}
.mock-side i{height:9px;border-radius:6px;background:var(--bg-softer);display:block}
.mock-side i.on{background:var(--brand-050)}
.mock-main{display:flex;flex-direction:column;gap:12px}
.mock-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.kpi{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:12px}
.kpi b{display:block;font-size:1.25rem;color:var(--ink)}
.kpi span{font-size:.72rem;color:var(--ink-3)}
.mock-chart{height:120px;border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;align-items:flex-end;gap:8px;background:#fff}
.mock-chart i{flex:1;border-radius:5px 5px 0 0;background:linear-gradient(180deg,var(--brand),#8fb2ff)}
.mock-rows{display:flex;flex-direction:column;gap:7px}
.mock-rows i{height:12px;border-radius:6px;background:var(--bg-softer);display:block}
.badge-float{position:absolute;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
  border-radius:12px;padding:9px 13px;font-size:.82rem;font-weight:700;display:flex;gap:8px;align-items:center}
.badge-float .dot{width:9px;height:9px;border-radius:50%}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat{text-align:center}
.stat b{font-size:2.4rem;font-weight:900;background:linear-gradient(100deg,var(--brand),var(--teal));
  -webkit-background-clip:text;background-clip:text;color:transparent;display:block;line-height:1}
.stat span{color:var(--ink-3);font-size:.92rem;font-weight:600}

/* grid cards */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-sm);transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.35rem;margin-bottom:15px;background:var(--brand-050);color:var(--brand)}
.card h3{margin-bottom:.35em}
.card p{color:var(--ink-2);font-size:.96rem;margin:0}
.card--link{display:block;color:inherit}
.card--link:hover{text-decoration:none}
.ico.teal{background:var(--teal-050);color:var(--teal)}
.ico.amber{background:#fdf0dd;color:var(--amber)}
.ico.violet{background:#f1eafe;color:var(--violet)}
.ico.rose{background:#fde8ee;color:var(--rose)}
.ico.green{background:#e6f6ec;color:var(--green)}

/* module feature list on module pages */
.feature{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.feature:last-child{border-bottom:0}
.feature .n{flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--brand-050);color:var(--brand);
  display:grid;place-items:center;font-weight:800;font-size:.9rem}
.feature h4{margin:0 0 3px;font-size:1.04rem}
.feature p{margin:0;color:var(--ink-2);font-size:.94rem}

/* two-col split section */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split--rev .split-art{order:-1}
.checklist{list-style:none;padding:0;margin:14px 0 0}
.checklist li{position:relative;padding-left:30px;margin-bottom:12px;color:var(--ink-2)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:6px;
  background:var(--teal-050);color:var(--teal);font-weight:900;display:grid;place-items:center;font-size:.8rem}

/* tech stack */
.stack{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stack .tech{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center}
.stack .tech b{display:block;font-size:1.02rem}
.stack .tech span{font-size:.82rem;color:var(--ink-3)}

/* clients / ends */
.ends{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.end{background:linear-gradient(180deg,#fff,var(--bg-soft));border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.end .tag{font-size:.75rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--teal)}
.end h3{margin:6px 0 10px}

/* price / tiers */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.tier{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow-sm)}
.tier.pop{border:2px solid var(--brand);box-shadow:var(--shadow-lg);position:relative}
.tier.pop::before{content:"推荐";position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--brand);color:#fff;font-size:.75rem;font-weight:700;padding:4px 14px;border-radius:999px}
.tier h3{font-size:1.15rem}
.tier .price{font-size:2rem;font-weight:900;margin:6px 0 2px}
.tier .price small{font-size:.9rem;font-weight:600;color:var(--ink-3)}
.tier ul{list-style:none;padding:0;margin:18px 0}
.tier ul li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:.93rem;color:var(--ink-2)}
.tier ul li:last-child{border-bottom:0}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--brand) 0%,#3b82f6 45%,var(--teal) 100%);
  border-radius:var(--radius-lg);padding:56px 40px;color:#fff;text-align:center;box-shadow:var(--shadow-lg)}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.9);max-width:560px;margin:10px auto 26px}
.cta-band .btn--primary{background:#fff;color:var(--brand);box-shadow:none}
.cta-band .btn--primary:hover{color:var(--brand-600)}
.cta-band .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff}

/* footer */
.footer{background:#0f1b2d;color:#c6d1e2;padding:56px 0 28px;margin-top:0}
.footer a{color:#c6d1e2;font-weight:500}
.footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;margin-bottom:34px}
.footer h4{color:#fff;font-size:.98rem;margin-bottom:14px}
.footer ul{list-style:none;padding:0;margin:0}
.footer ul li{margin-bottom:9px;font-size:.92rem}
.footer .brand{color:#fff}
.footer .brand .mark{box-shadow:none}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.86rem;color:#8595ad}

/* reveal animation */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* breadcrumb / page hero for subpages */
.phero{background:
  radial-gradient(900px 380px at 82% -20%,#e7f0ff,rgba(231,240,255,0) 60%),
  linear-gradient(180deg,var(--bg-soft),#fff);
  border-bottom:1px solid var(--line);padding:52px 0 46px}
.phero .crumb{font-size:.86rem;color:var(--ink-3);margin-bottom:12px}
.phero h1{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:.3em}
.phero .lead{max-width:720px}

/* module sub-nav pills */
.modnav{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.modnav a{font-size:.9rem;font-weight:600;color:var(--ink-2);background:#fff;border:1px solid var(--line-2);padding:7px 15px;border-radius:999px}
.modnav a:hover{border-color:var(--brand);color:var(--brand)}
.modnav a.active{background:var(--brand);color:#fff;border-color:var(--brand)}

/* table-ish spec list */
.spec{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec th,.spec td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line);font-size:.94rem}
.spec th{background:var(--bg-soft);font-weight:700;color:var(--ink)}
.spec tr:last-child td{border-bottom:0}
.spec td:first-child{font-weight:700;color:var(--ink-2);white-space:nowrap;width:32%}

/* flow diagram */
.flow{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center}
.flow .step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;min-width:140px;text-align:center;box-shadow:var(--shadow-sm)}
.flow .step b{display:block;font-size:1rem;margin-bottom:2px}
.flow .step span{font-size:.8rem;color:var(--ink-3)}
.flow .arrow{display:grid;place-items:center;color:var(--brand);font-size:1.4rem;padding:0 10px;font-weight:800}

.note{background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:10px;padding:14px 18px;font-size:.92rem;color:var(--ink-2)}

/* responsive */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .stack{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
  .split--rev .split-art{order:0}
  .ends,.tiers{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{position:fixed;inset:66px 0 auto 0;flex-direction:column;background:#fff;
    border-bottom:1px solid var(--line);padding:14px 24px 22px;gap:2px;
    transform:translateY(-140%);transition:transform .28s;box-shadow:var(--shadow);margin-left:0}
  .nav-links.open{transform:none}
  .nav-links a{width:100%;padding:12px 14px}
  .nav-cta{margin:8px 0 0}
  .nav-toggle{display:block}
}
@media (max-width:560px){
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .section{padding:58px 0}
  .footer-grid{grid-template-columns:1fr}
  .mock-kpis{grid-template-columns:1fr 1fr}
}