*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#f4f6fb; --card:#fff; --text:#1c2333; --muted:#8a93a8;
  --line:#e6eaf2; --accent:#3b6fe0; --accent-soft:#e9effe;
  --shadow:0 2px 12px rgba(30,45,90,.07); --shadow-lg:0 16px 48px rgba(30,45,90,.12);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:var(--accent-soft);padding:2px 7px;border-radius:6px;word-break:break-all}

/* nav */
.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:28px;max-width:1160px;margin:0 auto;padding:14px 24px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px)}
.brand{display:flex;align-items:center;gap:10px;color:var(--text)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex;width:36px;height:36px;border-radius:10px;background:var(--accent);align-items:center;justify-content:center}
.brand-name{font-size:17px;font-weight:700}
.brand-name small{font-size:12px;color:var(--muted);font-weight:400;margin-left:2px}
.nav-links{display:flex;gap:24px;margin-left:8px}
.nav-links a{color:var(--muted);font-size:14px}
.nav-links a:hover{color:var(--text);text-decoration:none}
.btn-gh{margin-left:auto;display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:8px 16px;box-shadow:var(--shadow)}
.btn-gh:hover{text-decoration:none;border-color:#cdd6e6}

main{max-width:1160px;margin:0 auto;padding:0 24px 40px}

/* hero: split layout */
.hero{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center;padding:64px 0 56px}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--accent);margin-bottom:14px}
.hero h1{font-size:44px;line-height:1.25;letter-spacing:-.01em;margin-bottom:16px}
.hero .sub{font-size:16.5px;color:#5b6b80;max-width:520px;margin-bottom:24px}
.cmdbox{display:flex;align-items:stretch;gap:0;background:#16213a;border-radius:12px;padding:12px 12px 12px 16px;box-shadow:var(--shadow-lg);margin-bottom:16px}
.cmdbox code{flex:1;background:none;color:#dbe4f5;padding:0;font-size:12.5px;line-height:1.6;word-break:break-all;align-self:center}
.copy{flex:0 0 auto;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:8px 16px;font-size:13.5px;font-weight:600;cursor:pointer}
.copy:hover{filter:brightness(1.1)}
.copy.done{background:#2fa36b}
.hero-cta{display:flex;gap:12px;margin-bottom:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;color:var(--text);background:var(--card);border:1px solid var(--line)}
.btn:hover{text-decoration:none;border-color:#cdd6e6}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.hero-note{font-size:13px;color:var(--muted)}
.hero-shot{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:12px;box-shadow:var(--shadow-lg)}
.hero-shot img{width:100%;display:block;border-radius:12px}
.hero-shot figcaption{font-size:12.5px;color:var(--muted);text-align:center;padding:10px 6px 2px}

/* TG flow strip */
.flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:16px;align-items:stretch;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 26px;box-shadow:var(--shadow);margin-bottom:64px}
.step{display:flex;gap:14px;align-items:flex-start}
.step-no{flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
.step b{font-size:15px}
.step p{font-size:13.5px;color:var(--muted);margin-top:2px}
.step-arrow{color:#c3cadb;font-size:20px;align-self:center}

/* features */
.features h2,.shots h2,.deploy h2{font-size:26px;margin-bottom:28px}
.row{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:center;margin-bottom:56px}
.row.flip .row-copy{order:2}
.row.flip .row-img{order:1}
.row-copy h3{font-size:21px;margin-bottom:10px}
.row-copy p{color:#5b6b80;margin-bottom:14px}
.row-copy ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.row-copy li{font-size:14px;padding-left:20px;position:relative}
.row-copy li::before{content:"";position:absolute;left:2px;top:9px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.row-img{width:100%;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:64px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.card .ic{display:inline-flex;color:var(--accent);background:var(--accent-soft);border-radius:10px;padding:8px;margin-bottom:10px}
.card b{display:block;font-size:15px;margin-bottom:4px}
.card p{font-size:13.5px;color:var(--muted)}

/* gallery */
.shots{margin-bottom:64px}
.shots-note{font-size:13px;color:var(--muted);font-weight:400}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery figure{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow)}
.gallery img{width:100%;display:block;border-radius:8px}
.gallery figcaption{font-size:13px;color:var(--muted);text-align:center;padding:8px 4px 2px}
.more{margin-top:16px;font-size:14px;color:var(--muted)}

/* deploy */
.deploy{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);margin-bottom:32px}
.deploy-inner{padding:36px 40px}
.deploy-inner h2{margin-bottom:10px}
.deploy-inner p{color:#5b6b80;margin-bottom:18px}
.deploy-alt{font-size:13.5px;color:var(--muted);margin-top:16px;margin-bottom:0}
.deploy-alt code{background:#f0f2f8}

/* footer */
footer{border-top:1px solid var(--line)}
.foot-inner{max-width:1160px;margin:0 auto;padding:22px 24px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.foot-brand{font-size:14px}
.foot-note{font-size:13px;color:var(--muted)}
.foot-links{margin-left:auto;display:flex;gap:18px}
.foot-links a{font-size:13.5px;color:var(--muted)}
.foot-links a:hover{color:var(--text)}

@media (max-width:960px){
  .hero{grid-template-columns:1fr;padding:40px 0}
  .hero h1{font-size:34px}
  .flow{grid-template-columns:1fr;gap:18px}
  .step-arrow{display:none}
  .row,.row.flip{grid-template-columns:1fr}
  .row.flip .row-copy,.row.flip .row-img{order:initial}
  .grid{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:560px){
  .grid,.gallery{grid-template-columns:1fr}
  .deploy-inner{padding:26px 20px}
  .cmdbox{flex-direction:column;gap:10px}
  .copy{width:100%}
}