:root{
  /* ── 品牌色 ───────────────────────────────── */
  --brand:#2f6bff;
  --brand-2:#7a5cff;
  --brand-ink:#0b1220;
  --ember:#ff8a3d;
  --gold:#ffcf3d;

  /* ── 中性色（浅色主题） ──────────────────── */
  --bg:#f6f8fc;
  --bg-2:#ffffff;
  --bg-3:#eef2f9;
  --line:#dfe6f2;
  --line-2:#c9d4e6;
  --ink:#101828;
  --ink-2:#475467;
  --ink-3:#7b8aa3;

  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --shadow-md:0 4px 12px rgba(16,24,40,.07),0 12px 28px rgba(16,24,40,.08);
  --shadow-lg:0 12px 32px rgba(16,24,40,.10),0 32px 64px rgba(16,24,40,.10);
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.02em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.wrap{width:min(100% - 40px,var(--maxw));margin-inline:auto}

/* ── 顶栏 ─────────────────────────────────────── */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(246,248,252,.82);
  backdrop-filter:saturate(1.6) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav__in{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.02em;white-space:nowrap}
.brand img{width:30px;height:30px;border-radius:8px}
.brand b{color:var(--brand)}
.nav__links{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav__links a{
  padding:7px 13px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:background .16s,color .16s;
}
.nav__links a:hover{background:var(--bg-3);color:var(--ink)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:11px;font-weight:700;font-size:15px;
  transition:transform .14s,box-shadow .14s,background .16s;
  white-space:nowrap;
}
.btn--primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 6px 18px rgba(47,107,255,.28)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(47,107,255,.36)}
.btn--ghost{background:var(--bg-2);color:var(--ink);border:1.5px solid var(--line-2)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn--lg{padding:14px 28px;font-size:16.5px;border-radius:13px}
.btn--block{width:100%}

/* ── Hero ────────────────────────────────────── */
.hero{position:relative;overflow:hidden;padding:76px 0 68px}
.hero::before{
  content:"";position:absolute;inset:-40% -20% auto -20%;height:520px;z-index:-1;
  background:
    radial-gradient(46% 60% at 22% 34%,rgba(47,107,255,.20),transparent 68%),
    radial-gradient(40% 52% at 78% 24%,rgba(122,92,255,.17),transparent 66%),
    radial-gradient(30% 44% at 56% 52%,rgba(255,140,61,.10),transparent 70%);
  filter:blur(4px);
}
.hero__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border-radius:999px;
  background:var(--bg-2);border:1px solid var(--line);box-shadow:var(--shadow-sm);
  font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:20px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 3px rgba(47,107,255,.18)}
h1{font-size:clamp(34px,5vw,54px);line-height:1.12}
h1 .hl{
  background:linear-gradient(120deg,var(--brand) 8%,var(--brand-2) 52%,var(--ember) 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{margin-top:20px;font-size:17.5px;color:var(--ink-2);max-width:56ch}
.cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stat b{display:block;font-size:29px;font-weight:800;letter-spacing:-.03em;color:var(--ink)}
.stat span{font-size:13.5px;color:var(--ink-3);font-weight:600}

.shot{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-lg);border:1px solid var(--line);background:#0d1117;
}
.shot img{width:100%;display:block}
.shot--hero img{max-height:430px;object-fit:cover;object-position:top left}
.shot::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.shotbar{display:flex;gap:6px;padding:11px 14px;background:#11161f;border-bottom:1px solid rgba(255,255,255,.07)}
.shotbar i{width:10px;height:10px;border-radius:50%;background:#2c3444;display:block}
.shotbar i:nth-child(1){background:#ff5f57}
.shotbar i:nth-child(2){background:#febc2e}
.shotbar i:nth-child(3){background:#28c840}
.shotbar span{margin-left:auto;font-size:11.5px;color:#6b7a94;font-weight:600;letter-spacing:.02em}

/* ── 通用区块 ─────────────────────────────────── */
section{padding:72px 0}
.alt{background:var(--bg-2);border-block:1px solid var(--line)}
.sec-head{max-width:64ch;margin-bottom:44px}
.sec-head.center{margin-inline:auto;text-align:center}
.kicker{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);margin-bottom:12px;
}
.sec-head h2{font-size:clamp(26px,3.4vw,38px)}
.sec-head p{margin-top:14px;font-size:17px;color:var(--ink-2)}

/* ── 特性卡 ───────────────────────────────────── */
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .18s,box-shadow .18s,border-color .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.card__ico{
  width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(47,107,255,.12),rgba(122,92,255,.12));
  color:var(--brand);margin-bottom:16px;
}
.card h3{font-size:17.5px;margin-bottom:8px}
.card p{font-size:14.8px;color:var(--ink-2)}
.card__tag{
  display:inline-block;margin-top:14px;font-size:12px;font-weight:700;color:var(--brand);
  background:rgba(47,107,255,.09);padding:3px 9px;border-radius:6px;
}

/* ── 底模矩阵 ─────────────────────────────────── */
.models{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.model{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;display:flex;flex-direction:column;gap:3px;
  transition:transform .16s,box-shadow .16s,border-color .16s;
}
.model:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--brand)}
.model b{font-size:16.5px;font-weight:800;letter-spacing:-.01em}
.model span{font-size:12.8px;color:var(--ink-3);font-weight:600}
.model i{
  font-style:normal;font-size:11.5px;font-weight:700;color:var(--ember);
  margin-top:6px;align-self:flex-start;background:rgba(255,138,61,.11);
  padding:2px 8px;border-radius:6px;
}
.models__note{margin-top:22px;font-size:13.6px;color:var(--ink-3);max-width:70ch}

/* ── 截图画廊 ─────────────────────────────────── */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.shotcard{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
}
.shotcard:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.shotcard__img{background:#0d1117;border-bottom:1px solid var(--line);overflow:hidden}
.shotcard__img img{width:100%;height:300px;object-fit:cover;object-position:top left}
.shotcard--wide .shotcard__img img{height:400px}
.shotcard__body{padding:18px 22px 20px}
.shotcard h3{font-size:16.5px;margin-bottom:5px}
.shotcard p{font-size:14.2px;color:var(--ink-2)}
.shotcard--wide{grid-column:1/-1}
.shotcard--wide .shotcard__body{padding:20px 26px 24px}

/* ── 三步上手 ─────────────────────────────────── */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s}
.steps--4{grid-template-columns:repeat(4,1fr);gap:18px}
.steps--4 .step{padding:26px 20px 22px}
.steps--4 .step::before{left:20px}
.steps--4 .step h3{font-size:16.2px}
.steps--4 .step p{font-size:14.1px}
.steps--4 .step code{font-size:12.2px;padding:10px 11px}
.step{
  position:relative;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius);padding:28px 24px 24px;
}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  position:absolute;top:-16px;left:24px;
  font-size:13px;font-weight:800;letter-spacing:.06em;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  padding:5px 12px;border-radius:8px;box-shadow:0 4px 12px rgba(47,107,255,.3);
}
.step h3{font-size:17px;margin:6px 0 8px}
.step p{font-size:14.6px;color:var(--ink-2)}
.step code{
  display:block;margin-top:14px;padding:11px 14px;border-radius:9px;
  background:var(--bg-3);border:1px solid var(--line);
  font-family:"Cascadia Mono",Consolas,"Courier New","Microsoft YaHei Mono",monospace;
  font-size:12.8px;line-height:1.85;color:var(--ink-2);
  white-space:pre;overflow-x:auto;
  font-variant-ligatures:none;
}

/* ── 自动打标 ─────────────────────────────────── */
.caption{display:grid;grid-template-columns:1.15fr 1fr;gap:44px;align-items:center}
.caption__lead{margin-top:14px;font-size:16.5px;color:var(--ink-2)}
.engines{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:26px 0 24px}
.engine{
  background:var(--bg-2);border:1px solid var(--line);border-radius:11px;padding:14px 16px;
}
.engine b{display:block;font-size:15.2px;font-weight:800;letter-spacing:-.01em}
.engine span{font-size:12.9px;color:var(--ink-3);line-height:1.6;display:block;margin-top:3px}
.caption__list{display:grid;gap:9px}
.caption__list li{
  font-size:14.6px;color:var(--ink-2);padding-left:17px;position:relative;
}
.caption__list li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;
  background:var(--brand);
}
.caption__list b{color:var(--ink);font-weight:700}
.caption__shot .shot{border-radius:var(--radius)}
.caption__shot .shot img{max-height:330px;object-fit:cover;object-position:top left}
.caption__cap{margin-top:11px;font-size:12.8px;color:var(--ink-3);text-align:center}

/* ── 格式转换提示 ─────────────────────────────── */
.convertbox{
  margin-top:34px;display:grid;grid-template-columns:1fr 1.05fr;gap:38px;align-items:center;
  background:linear-gradient(135deg,#fff9f2,#fdfbff);
  border:1px solid #f0e0cc;border-radius:var(--radius-lg);padding:32px 34px;
}
.convertbox h3{font-size:21px;margin-bottom:11px}
.convertbox p{font-size:15.2px;color:var(--ink-2)}
.convertbox__note{margin-top:12px;font-size:14px;color:var(--ink-3);padding-left:13px;border-left:3px solid var(--ember)}
.convertbox__shot{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-md);background:#0d1117;
}
.convertbox__shot img{width:100%;height:250px;object-fit:cover;object-position:top left}

/* ── FAQ ──────────────────────────────────────── */
.faq{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;align-items:start}
.qa{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px}
.qa h3{font-size:15.8px;margin-bottom:7px;display:flex;gap:9px;align-items:flex-start}
.qa h3::before{content:"Q";color:var(--brand);font-weight:800;flex:none}
.qa p{font-size:14.4px;color:var(--ink-2);padding-left:22px}

/* ── 下载 ─────────────────────────────────────── */
.dl{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:linear-gradient(140deg,#101a2e 0%,#1b2540 46%,#2a1f4a 100%);
  color:#e8edf7;padding:52px 48px;box-shadow:var(--shadow-lg);
}
.dl::before{
  content:"";position:absolute;inset:auto -10% -60% 40%;height:420px;
  background:radial-gradient(50% 50% at 50% 50%,rgba(255,140,61,.24),transparent 70%);
}
.dl__in{position:relative;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center}
.dl h2{font-size:clamp(24px,3.2vw,34px);color:#fff}
.dl p{margin-top:14px;color:#a9b6cf;max-width:52ch;font-size:16px}
.dl__meta{display:flex;gap:22px;margin-top:26px;flex-wrap:wrap}
.dl__meta div b{display:block;font-size:19px;color:#fff;font-weight:800}
.dl__meta div span{font-size:12.5px;color:#8494b0;font-weight:600}
.dl__act{display:flex;flex-direction:column;gap:12px;min-width:236px}
.dl__act .btn--primary{background:linear-gradient(135deg,#3d7bff,#8b5cff)}
.dl__act .btn--ghost{background:rgba(255,255,255,.06);color:#e8edf7;border-color:rgba(255,255,255,.18)}
.dl__act .btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.dl small{display:block;margin-top:14px;font-size:12.5px;color:#8494b0;text-align:center}
.dl__req{margin-top:20px;font-size:13.4px;color:#94a4bf;max-width:58ch;line-height:1.75}
.dl__req b{color:#c8d4e8}
.dl code{
  font-family:"Cascadia Mono",Consolas,"Courier New",monospace;font-size:.92em;
  background:rgba(255,255,255,.09);padding:1px 6px;border-radius:5px;color:#dbe4f2;
}

/* ── 页脚 ─────────────────────────────────────── */
footer{background:#0b1220;color:#93a1b8;padding:52px 0 34px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
footer h4{color:#fff;font-size:14.5px;margin-bottom:14px}
footer li{margin-bottom:9px}
footer a:hover{color:#fff}
footer .brand{color:#fff;margin-bottom:12px}
footer .brand img{width:28px;height:28px}
.fbottom{
  margin-top:38px;padding-top:22px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:#6d7c96;
}
.fbottom a{color:#93a1b8}

/* ── 响应式 ───────────────────────────────────── */
@media (max-width:1000px){
  .hero__grid{grid-template-columns:1fr;gap:38px}
  .feat{grid-template-columns:repeat(2,1fr)}
  .models{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .steps--4{grid-template-columns:1fr 1fr}
  .caption{grid-template-columns:1fr;gap:30px}
  .caption__shot{order:-1}
  .faq{grid-template-columns:1fr}
  .convertbox{grid-template-columns:1fr;gap:24px;padding:24px 22px}
  .dl__in{grid-template-columns:1fr}
  .dl__act{min-width:0}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav__links{display:none}
  section{padding:56px 0}
  .hero{padding:50px 0 46px}
  .feat,.models,.gallery,.fgrid{grid-template-columns:1fr}
  .steps--4{grid-template-columns:1fr}
  .engines{grid-template-columns:1fr}
  .dl{padding:34px 26px}
  .stats{display:grid;grid-template-columns:1fr 1fr;gap:20px 18px;margin-top:30px}
  .stat b{font-size:26px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}