:root{
  --ink:#0e1724;
  --ink-2:#3a4a5f;
  --ink-3:#6b7c93;
  --line:#e2e8f0;
  --bg:#ffffff;
  --bg-soft:#f6f8fb;
  --accent:#ff6b23;
  --accent-2:#1f6feb;
  --radius:14px;
  --maxw:1200px;
  --shadow:0 18px 46px -22px rgba(14,23,36,.35);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
code{font-family:var(--mono);font-size:.9em;background:#eef2f7;padding:.1em .35em;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:baseline;gap:8px}
.brand-mark{font-weight:800;font-size:20px;letter-spacing:.06em;color:var(--ink)}
.brand-sub{font-size:13px;color:var(--ink-3);letter-spacing:.14em}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14.5px;color:var(--ink-2)}
.nav-links a{position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--accent);transition:right .25s}
.nav-links a:hover::after{right:0}

/* ---------- buttons ---------- */
.btn{display:inline-block;border:0;cursor:pointer;background:var(--accent);color:#fff;font-weight:600;font-size:15px;
  padding:12px 22px;border-radius:10px;box-shadow:0 10px 24px -12px rgba(255,107,35,.8);
  transition:transform .16s,box-shadow .16s}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(255,107,35,.9)}
.btn:focus-visible,.copy-btn:focus-visible,.link-btn:focus-visible,.modal-x:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn-ghost:hover{border-color:var(--ink-3);background:var(--bg-soft);transform:none}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-lg{padding:15px 28px;font-size:16px}

/* ---------- hero ---------- */
.hero{padding:72px 0 84px;background:
  radial-gradient(1100px 460px at 88% -8%,rgba(31,111,235,.10),transparent 60%),
  radial-gradient(760px 420px at 4% 108%,rgba(255,107,35,.10),transparent 60%)}
.hero-in{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:56px;align-items:center}
.eyebrow{margin:0 0 14px;font-size:13px;letter-spacing:.18em;color:var(--accent-2);font-weight:600}
.hero h1{margin:0;font-size:clamp(34px,4.4vw,54px);line-height:1.22;letter-spacing:-.5px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;background:rgba(255,107,35,.16);z-index:-1}
.lede{margin:22px 0 0;color:var(--ink-2);font-size:17px;max-width:34em}
.cta{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 0}
.hero-facts{display:flex;gap:34px;list-style:none;padding:0;margin:42px 0 0}
.hero-facts li{display:flex;flex-direction:column}
.hero-facts b{font-size:30px;font-weight:800;line-height:1.1}
.hero-facts span{font-size:13px;color:var(--ink-3)}

/* ---------- shots ---------- */
.shot{position:relative;margin:0;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;box-shadow:var(--shadow);overflow:hidden}
.shot img{width:100%;height:auto}
.shot figcaption{font-size:12.5px;color:var(--ink-3);padding:10px 14px;border-top:1px solid var(--line);background:var(--bg-soft)}
/* 空贴图位：斜纹占位，替换图片后自动消失 */
.shot.is-empty{background:
  repeating-linear-gradient(135deg,#f7f9fc 0 12px,#eef2f8 12px 24px);min-height:230px}
.shot.is-empty img{display:none}
.shot.is-empty::after{content:"贴图位待替换";position:absolute;inset:0;display:grid;place-items:center;
  color:var(--ink-3);font-size:14px;letter-spacing:.1em}
.slot-note{display:none}
.shot.is-empty .slot-note{display:block;position:absolute;left:12px;bottom:44px;font-size:11.5px;
  color:var(--ink-3);background:rgba(255,255,255,.9);border:1px dashed var(--line);border-radius:8px;padding:4px 8px}
.shot.is-empty .slot-note code{background:none;padding:0;color:var(--accent-2)}

/* ---------- flow ---------- */
.flow{padding:74px 0;background:var(--ink);color:#fff}
.flow .sec-title{color:#fff}
.flow-line{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:34px}
.step{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);border-radius:12px;padding:20px 18px;position:relative}
.step i{font-style:normal;font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:.1em}
.step b{display:block;font-size:16.5px;margin:6px 0 4px}
.step span{font-size:13px;color:#a9b7c9;line-height:1.6}
.step:not(:last-child)::after{content:"→";position:absolute;right:-13px;top:50%;transform:translateY(-50%);color:rgba(255,255,255,.28);font-size:15px}
.flow-foot{margin:34px 0 0;font-size:17px;color:#c9d5e4}
.flow-foot b{color:#fff}

/* ---------- sections ---------- */
section{scroll-margin-top:80px}
.sec-title{margin:0;font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.3px}
.sec-sub{margin:10px 0 0;color:var(--ink-3);font-size:15px}
.feature{padding:82px 0;border-bottom:1px solid var(--line)}
.feature.alt{background:var(--bg-soft)}
.feature-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:52px;align-items:center}
.feature.alt .feature-copy{order:2}
.feature.alt figure{order:1}
.tag{display:inline-block;margin:0 0 12px;font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--accent);border:1px solid rgba(255,107,35,.3);border-radius:999px;padding:3px 12px}
.feature h2{margin:0 0 20px;font-size:clamp(23px,2.5vw,31px);line-height:1.35;font-weight:800;letter-spacing:-.3px}
.bullets{list-style:none;padding:0;margin:0}
.bullets li{position:relative;padding:0 0 0 22px;margin:0 0 13px;color:var(--ink-2);font-size:15.5px;line-height:1.8}
.bullets li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;background:var(--accent-2);opacity:.75}
.bullets b{color:var(--ink)}
.aside{margin:22px 0 0;padding:14px 16px;border-left:3px solid var(--accent);background:#fff;
  border-radius:0 10px 10px 0;color:var(--ink);font-size:15.5px;box-shadow:0 8px 22px -18px rgba(14,23,36,.5)}
.feature.alt .aside{background:#fff}

/* ---------- why ---------- */
.why{padding:78px 0}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:32px}
.why-grid>div{border:1px solid var(--line);border-radius:12px;padding:22px;background:#fff}
.why-grid b{display:block;font-size:17px;margin-bottom:6px}
.why-grid span{font-size:14.5px;color:var(--ink-3);line-height:1.7}

/* ---------- shots grid ---------- */
.shots{padding:78px 0;background:var(--bg-soft);border-top:1px solid var(--line)}
.shot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.shot-sm{box-shadow:0 12px 28px -22px rgba(14,23,36,.5)}
.shot-sm figcaption{font-size:12px}

/* ---------- quote ---------- */
.quote{padding:86px 0;text-align:center}
.quote p{margin:0;font-size:clamp(20px,2.5vw,28px);font-weight:700;line-height:1.6;letter-spacing:-.2px}
.quote-by{display:block;margin-top:18px;color:var(--ink-3);font-size:15px}

/* ---------- get ---------- */
.get{padding:70px 0;background:linear-gradient(120deg,#0e1724,#1b2f4b);color:#fff}
.get-in{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.get h2{margin:0 0 10px;font-size:28px;font-weight:800}
.get p{margin:0;color:#b9c7d9;max-width:34em;font-size:15.5px}
.get-cta{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- contact modal ---------- */
button{font-family:inherit}
.link-btn{background:none;border:0;padding:0;text-align:left;font-size:14px;color:var(--ink-3);cursor:pointer}
.link-btn:hover{color:var(--accent)}
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:24px}
.modal[hidden]{display:none}
.modal-backdrop{position:absolute;inset:0;background:rgba(9,15,24,.62);backdrop-filter:blur(3px);animation:fade .2s ease}
.modal-card{position:relative;width:min(760px,100%);max-height:calc(100vh - 48px);overflow:auto;
  background:#fff;border-radius:18px;padding:38px 38px 34px;box-shadow:0 40px 90px -30px rgba(9,15,24,.6);
  animation:pop .24s cubic-bezier(.2,.8,.3,1)}
@keyframes fade{from{opacity:0}}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}}
.modal-x{position:absolute;right:14px;top:10px;width:36px;height:36px;border:0;border-radius:10px;
  background:transparent;color:var(--ink-3);font-size:24px;line-height:1;cursor:pointer}
.modal-x:hover{background:var(--bg-soft);color:var(--ink)}
.modal-card h3{margin:12px 0 8px;font-size:25px;font-weight:800;letter-spacing:-.2px}
.modal-lede{margin:0;color:var(--ink-2);font-size:15.5px}
.modal-body{display:grid;grid-template-columns:232px minmax(0,1fr);gap:30px;align-items:start;margin-top:26px}
.qr{margin:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.qr img{width:100%;height:auto;display:block}
.qr figcaption{font-size:12.5px;color:var(--ink-3);text-align:center;padding:9px;border-top:1px solid var(--line);background:var(--bg-soft)}
.contact-list{display:flex;flex-direction:column;gap:16px}
.contact-list>div{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg-soft)}
.contact-list .k{display:block;font-size:12.5px;letter-spacing:.1em;color:var(--ink-3);margin-bottom:4px}
.contact-list .v{display:inline-block;font-size:21px;font-weight:700;color:var(--ink)}
.contact-list .v-sm{font-size:14.5px;font-weight:400;line-height:1.7;color:var(--ink-2)}
.tel:hover{color:var(--accent)}
.copy-btn{margin-left:10px;font-size:12.5px;padding:5px 11px;border:1px solid var(--line);border-radius:8px;
  background:#fff;color:var(--ink-2);cursor:pointer;vertical-align:middle}
.copy-btn:hover{border-color:var(--accent);color:var(--accent)}
.copy-btn.done{border-color:#22a06b;color:#22a06b}

/* ---------- footer ---------- */
.foot{padding:56px 0 26px;border-top:1px solid var(--line);background:#fff}
.foot-in{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.foot p{margin:10px 0 0;color:var(--ink-3);font-size:14px;max-width:26em}
.foot-cols{display:flex;gap:56px;flex-wrap:wrap}
.foot-cols>div{display:flex;flex-direction:column;gap:8px;font-size:14px}
.foot-cols b{font-size:13px;letter-spacing:.1em;color:var(--ink);margin-bottom:4px}
.foot-cols a{color:var(--ink-3)}
.foot-cols a:hover{color:var(--accent)}
.foot-ph{color:#a9b7c9;font-size:13px}
.foot-b{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:34px;padding-top:18px;
  border-top:1px solid var(--line);color:#98a7b8;font-size:12.5px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero-in,.feature-in{grid-template-columns:1fr;gap:34px}
  .feature.alt .feature-copy{order:1}.feature.alt figure{order:2}
  .flow-line{grid-template-columns:repeat(2,1fr)}
  .step:not(:last-child)::after{display:none}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .shot-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:620px){
  .br-desk{display:none}
  .modal-card{padding:28px 22px}
  .modal-body{grid-template-columns:1fr;gap:20px}
  .qr{max-width:232px}
  .contact-list .v{font-size:19px}
  .flow-line,.why-grid,.shot-grid{grid-template-columns:1fr}
  .hero{padding:44px 0 56px}
  .hero-facts{gap:22px}
  .feature{padding:56px 0}
}