:root{
  --primary:#1F7A5B;--primary-deep:#14523F;--primary-soft:#2E9A74;
  --mint:#EAF6F0;--mint-line:#C9E0D4;--paper:#F6FBF8;
  --accent:#F08A4B;--dark:#123F33;--ink:#1E332C;--muted:#5C7168;--faint:#8AA099;
  --border:#DFECE5;--card:#FFFFFF;
  --font:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:"SF Mono","JetBrains Mono",Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.75;font-size:16px}
a{color:var(--primary);text-decoration:none}
h2.sec{font-size:30px;font-weight:700;color:var(--dark);letter-spacing:.5px}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head p{color:var(--muted);margin-top:8px;font-size:15px}
.kicker{display:inline-block;font-size:12px;font-weight:600;letter-spacing:2px;color:var(--primary-soft);background:var(--mint);padding:4px 14px;border-radius:999px;margin-bottom:14px}
.section{padding:76px 28px 0}
.section-body{max-width:1120px;margin:0 auto}

/* ── 导航 ── */
.nav{position:sticky;top:0;z-index:100;background:rgba(246,251,248,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1120px;margin:0 auto;padding:12px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--primary-deep)}
.brand svg{width:42px;height:31px}
.brand small{font-weight:500;color:var(--faint);font-size:12px;margin-left:2px;letter-spacing:.5px}
.nav-links{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:700}
.nav-cta{background:var(--primary);color:#fff!important;padding:8px 20px;border-radius:9px;font-weight:600}
.nav-cta:hover{background:var(--primary-deep)}

/* ── 首页 Hero ── */
.hero{background:linear-gradient(180deg,#F2F9F5 0%,#E6F2EB 100%);padding:72px 28px 88px}
.hero-grid{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center}
.hero h1{font-size:46px;font-weight:700;color:var(--dark);line-height:1.22;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero .sub{font-size:17.5px;color:var(--muted);max-width:520px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:24px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:10px;font-size:15.5px;font-weight:600;transition:all .2s;border:none;font-family:var(--font);cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--mint)}
.hero-note{font-size:13px;color:var(--faint)}
.hero-art{display:flex;justify-content:center}
.hero-art svg{width:min(370px,78vw);height:auto}

/* ── 子页页头 ── */
.page-head{background:linear-gradient(180deg,#F2F9F5 0%,#E6F2EB 100%);padding:56px 28px 48px;text-align:center}
.page-head h1{font-size:36px;font-weight:700;color:var(--dark);margin-bottom:10px}
.page-head p{font-size:15.5px;color:var(--muted);max-width:620px;margin:0 auto}

/* ── KPI ── */
.kpis{max-width:980px;margin:-44px auto 0;padding:0 28px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;position:relative;z-index:2}
.kpi{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px 16px;text-align:center;box-shadow:0 6px 24px rgba(18,63,51,.06)}
.kpi b{display:block;font-size:26px;font-weight:700;color:var(--primary)}
.kpi span{font-size:13px;color:var(--muted)}

/* 理念 */
.phi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.phi{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:30px 28px}
.phi .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;color:var(--primary);background:var(--mint);border-radius:999px;padding:3px 12px;margin-bottom:14px}
.phi h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.phi p{font-size:14.5px;color:var(--muted)}

/* 能力 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:26px 24px;transition:transform .2s,box-shadow .2s}
.cap:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(18,63,51,.08)}
.cap-bar{width:34px;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--primary-soft),var(--primary));margin-bottom:14px}
.cap h3{font-size:16.5px;color:var(--dark);margin-bottom:8px}
.cap p{font-size:13.8px;color:var(--muted);line-height:1.7}

/* 特点 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat{display:flex;gap:14px;align-items:flex-start;border:1px dashed var(--mint-line);border-radius:14px;padding:20px;background:rgba(255,255,255,.5)}
.feat .dot{flex:0 0 auto;width:10px;height:10px;border-radius:50%;background:var(--accent);margin-top:8px}
.feat h3{font-size:15.5px;color:var(--dark);margin-bottom:4px}
.feat p{font-size:13.5px;color:var(--muted)}

/* 架构 */
.arch{background:var(--dark);border-radius:22px;padding:46px 42px;color:#DCEBE3}
.arch .sec-head p{color:#9CC5B4}
.arch h2.sec{color:#fff}
.arch-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:36px;align-items:start}
.layer-stack{display:flex;flex-direction:column;gap:10px}
.layer{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:14px 18px}
.layer b{color:#fff;font-size:14.5px}
.layer span{display:block;font-size:12.5px;color:#9CC5B4;margin-top:2px}
.layer.hl{background:rgba(46,154,116,.22);border-color:rgba(46,154,116,.5)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}
.chip{font-size:12.5px;font-family:var(--mono);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:#DCEBE3;padding:5px 12px;border-radius:999px}
.mech{list-style:none;display:grid;gap:11px}
.mech li{font-size:13.8px;color:#C8DED4;padding-left:18px;position:relative}
.mech li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--primary-soft)}
.mech b{color:#fff;font-weight:600}

/* 定价 */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;max-width:980px;margin:0 auto}
.price{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:32px 28px;text-align:center;position:relative}
.price.featured{border:2px solid var(--primary);box-shadow:0 10px 30px rgba(18,63,51,.10)}
.price .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;padding:3px 16px;border-radius:999px;font-size:12px;font-weight:600}
.price h3{font-size:15.5px;color:var(--dark);font-weight:600}
.price .amount{font-size:34px;font-weight:700;color:var(--primary);margin:12px 0 2px}
.price .amount small{font-size:13px;font-weight:400;color:var(--faint)}
.price p{font-size:13.5px;color:var(--muted);margin-top:12px;line-height:1.8}
.price-note{text-align:center;margin-top:18px;color:var(--faint);font-size:13.5px}

/* 版本更新 */
.tl{position:relative;max-width:820px;margin:0 auto;padding-left:26px}
.tl::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--mint-line)}
.tl-item{position:relative;padding:0 0 34px 22px}
.tl-item::before{content:"";position:absolute;left:-26px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:3px solid var(--mint)}
.tl-item:last-child{padding-bottom:0}
.tl-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
.ver{font-family:var(--mono);font-size:12.5px;font-weight:700;color:#fff;background:var(--primary);padding:3px 10px;border-radius:7px}
.date{font-size:13px;color:var(--faint)}
.tl-item h3{font-size:16.5px;color:var(--dark);margin-bottom:6px}
.tl-item ul{list-style:none;display:grid;gap:4px}
.tl-item li{font-size:13.8px;color:var(--muted);padding-left:16px;position:relative}
.tl-item li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:2px;border-radius:1px;background:var(--accent)}
.tl-item.now::before{background:var(--accent);border-color:#FDEBDD}

/* 技术档案 */
.tech-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tech{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:26px}
.tech h3{font-size:16px;color:var(--dark);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.tech h3::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--primary-soft)}
.tech ul{list-style:none;display:grid;gap:6px}
.tech li{font-size:13.6px;color:var(--muted);padding-left:15px;position:relative}
.tech li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:2px;border-radius:1px;background:var(--mint-line)}
.tech code{font-family:var(--mono);font-size:12px;background:var(--mint);color:var(--primary-deep);padding:1px 7px;border-radius:6px}
.codebox{grid-column:1/-1;background:#0E342A;border-radius:14px;padding:22px 24px;overflow:auto}
.codebox pre{font-family:var(--mono);font-size:12.5px;line-height:1.8;color:#C8E6D8}
.codebox .cm{color:#6E9A88}

/* 帮助 */
.help-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:28px;align-items:start}
.steps-mini{display:grid;gap:14px}
.step{display:flex;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px}
.step .n{flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--mint);color:var(--primary);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px}
.step h3{font-size:15px;color:var(--dark);margin-bottom:2px}
.step p{font-size:13.5px;color:var(--muted)}
details.faq{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:0 20px;margin-bottom:10px}
details.faq summary{cursor:pointer;font-size:14.5px;font-weight:600;color:var(--dark);padding:15px 0;list-style:none;display:flex;justify-content:space-between;align-items:center}
details.faq summary::after{content:"+";color:var(--primary);font-size:18px;font-weight:400}
details.faq[open] summary::after{content:"–"}
details.faq p{font-size:13.6px;color:var(--muted);padding:0 0 16px}

/* CTA + 页脚 */
.cta-band{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-deep) 100%);border-radius:22px;max-width:1120px;margin:84px auto 0;padding:56px 40px;text-align:center;color:#fff}
.cta-band h2{font-size:27px;font-weight:700;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.82);margin-bottom:28px;font-size:15px}
.cta-band .btn{background:var(--accent);color:#fff}
.cta-band .btn:hover{background:#E07A38;transform:translateY(-1px)}
.footer{margin-top:84px;background:var(--dark);color:rgba(255,255,255,.62);padding:52px 28px 36px}
.footer-inner{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}
.footer h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
.footer ul{list-style:none;display:grid;gap:8px}
.footer a{color:rgba(255,255,255,.62);font-size:13.5px}
.footer a:hover{color:#fff}
.footer .fbrand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer .fbrand svg{width:40px;height:29px}
.footer .fbrand b{color:#fff;font-size:17px}
.footer .fbrand small{color:#9CC5B4;font-size:11px;letter-spacing:1px}
.footer-bottom{max-width:1120px;margin:36px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:12.5px;color:rgba(255,255,255,.45);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media(max-width:880px){
  .hero-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .page-head h1{font-size:27px}
  .kpis{grid-template-columns:repeat(2,1fr)}
  .phi-grid,.cap-grid,.feat-grid,.price-grid,.tech-grid,.help-grid{grid-template-columns:1fr}
  .arch{padding:32px 24px}
  .arch-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}