/* ==========================================================================
   AI 办公生态服务商 · 融资商业计划书
   Design system / deck styles
   --------------------------------------------------------------------------
   01 tokens
   02 reset & base
   03 texture & ambient background
   04 deck chrome (progress / dots / pager / brand)
   05 slide scaffold & typography
   06 reveal motion
   07 primitives: card / stat / tag / table / quote / list
   08 components: flywheel / chain / steps / browser / phone / bars
   09 per-slide tuning
   10 responsive & print & reduced motion
   ========================================================================== */

/* 01 tokens ---------------------------------------------------------------- */
:root{
  --bg:#04060c;
  --bg-soft:#070b15;
  --panel:rgba(255,255,255,.034);
  --panel-2:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.085);
  --line-strong:rgba(255,255,255,.16);
  --ink:#eef3ff;
  --ink-2:#c6d0e6;
  --muted:#8b97b3;
  --dim:#5c6782;

  --cyan:#3ddcff;
  --blue:#4c7dff;
  --violet:#9b6bff;
  --gold:#f6bd55;
  --gold-2:#ff9a4d;
  --green:#3ce3a4;
  --red:#ff7385;

  --grad-ai:linear-gradient(115deg,#3ddcff 0%,#4c7dff 46%,#9b6bff 100%);
  --grad-gold:linear-gradient(115deg,#ffe6a8 0%,#f6bd55 45%,#ff9a4d 100%);
  --grad-green:linear-gradient(115deg,#8fffd2 0%,#3ce3a4 100%);

  --r-lg:22px;
  --r-md:16px;
  --r-sm:10px;

  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-num:"SF Pro Display",-apple-system,"Segoe UI",Inter,"Helvetica Neue",Arial,sans-serif;

  --ease:cubic-bezier(.16,1,.3,1);
  --ease-soft:cubic-bezier(.22,.61,.36,1);

  --pad-x:clamp(22px,4.4vw,84px);
}

/* 02 reset & base ---------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{height:100%;-webkit-text-size-adjust:100%}
body{
  margin:0;height:100%;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.55;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow:hidden;
}
::selection{background:rgba(61,220,255,.28);color:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
.mono{font-variant-numeric:tabular-nums;font-family:var(--font-num);letter-spacing:-.01em}

/* 03 texture & ambient background ------------------------------------------ */
#deck{position:relative;height:100vh;height:100dvh;overflow-y:auto;overflow-x:hidden;
  scroll-snap-type:y mandatory;scroll-behavior:smooth;scrollbar-width:none;overscroll-behavior:none}
#deck::-webkit-scrollbar{display:none}

.bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg::before{ /* fine grid */
  content:"";position:absolute;inset:-1px;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 40%,#000 20%,transparent 78%);
}
.bg::after{ /* noise */
  content:"";position:absolute;inset:0;opacity:.16;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;will-change:transform}
.orb-a{width:46vw;height:46vw;left:-12vw;top:-14vw;background:radial-gradient(circle at 35% 35%,rgba(61,220,255,.32),transparent 62%)}
.orb-b{width:52vw;height:52vw;right:-16vw;top:4vh;background:radial-gradient(circle at 55% 45%,rgba(76,125,255,.3),transparent 62%)}
.orb-c{width:38vw;height:38vw;left:22vw;bottom:-24vw;background:radial-gradient(circle at 50% 50%,rgba(155,107,255,.26),transparent 64%)}
.orb{animation:orbFloat 26s var(--ease-soft) infinite alternate}
.orb-b{animation-duration:32s;animation-delay:-8s}
.orb-c{animation-duration:38s;animation-delay:-16s}
@keyframes orbFloat{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(3vw,-2vh,0) scale(1.08)}}

.vignette{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse 78% 68% at 50% 46%,transparent 38%,rgba(3,5,10,.55) 82%,rgba(3,5,10,.9) 100%)}

/* 04 deck chrome ----------------------------------------------------------- */
.chrome{position:fixed;z-index:50;pointer-events:none}
.progress{top:0;left:0;right:0;height:2px;background:rgba(255,255,255,.06)}
.progress i{display:block;height:100%;width:0;background:var(--grad-ai);
  box-shadow:0 0 18px rgba(61,220,255,.8);transition:width .18s linear}

.dots{right:clamp(14px,2vw,30px);top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:11px;pointer-events:auto}
.dots button{position:relative;width:26px;height:8px;display:flex;align-items:center;justify-content:flex-end;padding:0}
.dots button::before{content:"";width:6px;height:6px;border-radius:50%;
  background:rgba(255,255,255,.24);transition:all .45s var(--ease)}
.dots button:hover::before{background:rgba(255,255,255,.6)}
.dots button.on::before{width:20px;border-radius:6px;background:var(--cyan);
  box-shadow:0 0 12px rgba(61,220,255,.9)}
.dots button span{position:absolute;right:34px;top:50%;transform:translate(6px,-50%);
  white-space:nowrap;font-size:11px;letter-spacing:.14em;color:var(--ink-2);
  background:rgba(8,12,22,.86);border:1px solid var(--line);padding:5px 9px;border-radius:6px;
  opacity:0;transition:all .3s var(--ease);pointer-events:none;backdrop-filter:blur(8px)}
.dots button:hover span{opacity:1;transform:translate(0,-50%)}

.pager{left:var(--pad-x);bottom:clamp(16px,3.2vh,34px);font-size:11px;letter-spacing:.22em;
  color:var(--dim);display:flex;align-items:center;gap:12px;pointer-events:auto}
.pager b{color:var(--ink);font-weight:600;font-size:13px;letter-spacing:.08em}
.pager i{display:block;width:34px;height:1px;background:var(--line-strong)}

.brandmark{right:var(--pad-x);bottom:clamp(16px,3.2vh,34px);font-size:10.5px;letter-spacing:.24em;
  color:var(--dim);text-transform:uppercase;display:flex;align-items:center;gap:9px}
.brandmark .dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}

/* fullscreen toggle */
.fsbtn{position:fixed;right:var(--pad-x);bottom:clamp(46px,6.6vh,68px);z-index:60;
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 15px;border-radius:99px;
  border:1px solid var(--line-strong);background:rgba(8,12,22,.55);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);color:var(--ink-2);font-size:11px;letter-spacing:.14em;
  transition:color .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease),box-shadow .35s var(--ease)}
.fsbtn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto}
.fsbtn .ico-collapse{display:none}
.fsbtn:hover{color:#fff;border-color:rgba(61,220,255,.55);background:rgba(61,220,255,.1);
  box-shadow:0 0 26px rgba(61,220,255,.18)}
.fsbtn:active{transform:scale(.97)}
html.is-fs .fsbtn .ico-expand{display:none}
html.is-fs .fsbtn .ico-collapse{display:block}
html.is-fs .fsbtn{border-color:rgba(61,220,255,.42);color:#dff9ff}

.hint{position:fixed;left:50%;bottom:clamp(14px,2.6vh,26px);transform:translateX(-50%);z-index:40;
  font-size:11px;letter-spacing:.2em;color:var(--dim);display:flex;align-items:center;gap:8px;
  transition:opacity .6s var(--ease);pointer-events:none}
.hint.hide{opacity:0}
.hint .k{border:1px solid var(--line-strong);border-radius:5px;padding:2px 6px;font-size:10px;color:var(--ink-2)}

/* 05 slide scaffold -------------------------------------------------------- */
.slide{position:relative;z-index:2;min-height:100vh;min-height:100dvh;scroll-snap-align:start;
  scroll-snap-stop:always;display:flex;align-items:center;justify-content:center;
  padding:clamp(64px,9vh,110px) var(--pad-x) clamp(58px,8vh,96px)}
.slide-inner{width:min(1340px,100%);position:relative}

.slide-head{margin-bottom:clamp(24px,4vh,46px);max-width:1000px}
.kicker{display:inline-flex;align-items:center;gap:12px;font-size:11px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.kicker i{font-style:normal;color:var(--cyan);font-family:var(--font-num);letter-spacing:.06em;font-size:12px}
.kicker::after{content:"";width:46px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}

h1.big{font-size:clamp(52px,7.2vw,104px);line-height:1.02;letter-spacing:-.035em;font-weight:750;
  background:linear-gradient(180deg,#fff 8%,#cfdcf7 58%,#8fa4c9 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent}
h2.sec{font-size:clamp(30px,3.5vw,50px);line-height:1.14;letter-spacing:-.025em;font-weight:700;
  color:#fff;max-width:17em}
h2.sec .accent{background:var(--grad-ai);-webkit-background-clip:text;background-clip:text;color:transparent}
h3.sub{font-size:clamp(17px,1.5vw,21px);font-weight:600;line-height:1.4;letter-spacing:-.01em}
.lede{margin-top:16px;color:var(--muted);font-size:clamp(14px,1.12vw,17px);line-height:1.75;max-width:64ch}
.lede strong{color:var(--ink-2);font-weight:600}

.eyebrow{font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--dim)}
.hr{height:1px;background:linear-gradient(90deg,var(--line-strong),transparent);border:0;margin:30px 0}

.grid{display:grid;gap:clamp(12px,1.4vw,18px)}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g5{grid-template-columns:repeat(5,1fr)}
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(26px,4vw,64px);align-items:center}
.split.tight{gap:clamp(20px,2.6vw,40px)}
.stack{display:flex;flex-direction:column}

/* 06 reveal motion --------------------------------------------------------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .85s var(--ease),transform .85s var(--ease);
  transition-delay:var(--d,0s);will-change:opacity,transform}
.rv-l{transform:translateX(-30px)}
.rv-r{transform:translateX(30px)}
.rv-s{transform:scale(.94);transform-origin:center}
.slide.is-active .rv{opacity:1;transform:none}

/* 07 primitives ------------------------------------------------------------ */
.card{position:relative;background:linear-gradient(180deg,rgba(16,23,38,.62),rgba(7,11,20,.5));
  border:1px solid var(--line);border-radius:var(--r-md);padding:clamp(16px,1.7vw,24px);
  overflow:hidden;transition:transform .5s var(--ease),border-color .5s var(--ease),background .5s var(--ease)}
.card::before{content:"";position:absolute;top:0;left:14%;right:14%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.34),transparent);opacity:.55}
.card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.2);
  background:linear-gradient(180deg,rgba(21,30,50,.7),rgba(10,15,26,.56))}
.card.plain{background:rgba(255,255,255,.025)}
.card.flat:hover{transform:none}

.stat{padding:clamp(14px,1.4vw,20px) 0}
.stat .v{font-family:var(--font-num);font-weight:700;letter-spacing:-.04em;line-height:1;
  font-size:clamp(34px,3.5vw,54px);font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#fff,#cbdcf8 72%,#93a8cc);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stat .v .unit{font-size:.42em;font-weight:600;letter-spacing:0;margin-left:4px;
  background:none;-webkit-text-fill-color:var(--muted);color:var(--muted);vertical-align:middle}
.stat .k{margin-top:8px;font-size:12.5px;letter-spacing:.08em;color:var(--muted)}
.stat .src{margin-top:4px;font-size:10.5px;color:var(--dim);letter-spacing:.02em}
.stat.gold .v{background:linear-gradient(180deg,#fff3d0,#f6bd55 70%,#d98c26);-webkit-background-clip:text;background-clip:text}
.stat.cyan .v{background:linear-gradient(180deg,#e0fbff,#3ddcff 70%,#2b9fdc);-webkit-background-clip:text;background-clip:text}
.stat.green .v{background:linear-gradient(180deg,#dcfff2,#3ce3a4 72%,#1fa87a);-webkit-background-clip:text;background-clip:text}
.stat.red .v{background:linear-gradient(180deg,#ffe1e6,#ff7385 72%,#d94b61);-webkit-background-clip:text;background-clip:text}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:99px;
  border:1px solid var(--line-strong);font-size:11px;letter-spacing:.06em;color:var(--ink-2);
  background:rgba(255,255,255,.04);white-space:nowrap}
.tag.cyan{color:#b9f4ff;border-color:rgba(61,220,255,.4);background:rgba(61,220,255,.09)}
.tag.gold{color:#ffe3ad;border-color:rgba(246,189,85,.42);background:rgba(246,189,85,.09)}
.tag.green{color:#b8ffe0;border-color:rgba(60,227,164,.4);background:rgba(60,227,164,.08)}
.tag.violet{color:#dcc9ff;border-color:rgba(155,107,255,.42);background:rgba(155,107,255,.1)}
.tag.red{color:#ffc2cb;border-color:rgba(255,115,133,.4);background:rgba(255,115,133,.08)}

.kv{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:11px 0;
  border-bottom:1px solid rgba(255,255,255,.06)}
.kv:last-child{border-bottom:0}
.kv .kk{color:var(--muted);font-size:12.5px;letter-spacing:.04em}
.kv .vv{color:var(--ink);font-size:13.5px;font-weight:600;font-family:var(--font-num);letter-spacing:.01em;text-align:right}

.tbl{font-size:13px}
.tbl th{font-weight:500;color:var(--muted);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  text-align:left;padding:0 12px 10px;border-bottom:1px solid var(--line-strong);white-space:nowrap}
.tbl td{padding:12px;border-bottom:1px solid rgba(255,255,255,.055);color:var(--ink-2);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl tbody tr{transition:background .3s}
.tbl tbody tr:hover{background:rgba(255,255,255,.035)}
.tbl .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.tbl .strong{color:#fff;font-weight:600}
.tbl .hl{color:var(--gold)}
.tbl.tight td{padding:9px 10px}
.tbl.tight th{padding:0 10px 8px}

.quote{font-size:clamp(18px,1.7vw,24px);line-height:1.55;letter-spacing:-.01em;color:var(--ink);
  font-weight:500}
.quote .hl{background:var(--grad-ai);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700}
.quote.gold .hl{background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}

.bullets li{position:relative;padding-left:22px;margin:9px 0;color:var(--ink-2);font-size:14px;line-height:1.65}
.bullets li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(61,220,255,.55);transform:rotate(45deg)}
.bullets.gold li::before{background:var(--gold);box-shadow:0 0 12px rgba(246,189,85,.5)}
.bullets li b{color:#fff;font-weight:600}

.note{font-size:11px;color:var(--dim);letter-spacing:.02em;line-height:1.6}
.srcline{font-size:10.5px;color:var(--dim);letter-spacing:.02em}

.pill-row{display:flex;flex-wrap:wrap;gap:8px}
.divider-v{width:1px;background:linear-gradient(180deg,transparent,var(--line-strong),transparent);align-self:stretch}

.icon-box{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.045);color:var(--cyan);flex:0 0 auto}
.icon-box svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.icon-box.gold{color:var(--gold)}
.icon-box.green{color:var(--green)}
.icon-box.violet{color:var(--violet)}

.num-badge{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;
  font-size:12px;font-weight:700;font-family:var(--font-num);color:var(--cyan);
  background:rgba(61,220,255,.1);border:1px solid rgba(61,220,255,.35)}

/* 08 components ------------------------------------------------------------ */
/* --- hero cover --- */
.cover{display:flex;flex-direction:column;justify-content:center}
.cover .top{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;
  font-size:11px;letter-spacing:.2em;color:var(--muted);text-transform:uppercase}
.cover h1{margin:clamp(26px,4vh,48px) 0 0}
.cover .subline{margin-top:22px;font-size:clamp(15px,1.4vw,20px);color:var(--ink-2);letter-spacing:.01em;font-weight:400}
.cover .subline em{font-style:normal;color:var(--gold);font-weight:600}
.cover-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,30px);
  margin-top:clamp(34px,6vh,64px);max-width:860px}
.cover-metrics .item{border-left:1px solid var(--line-strong);padding-left:16px}
.cover-metrics .item:first-child{border-left:0;padding-left:0}
.cover-metrics .v{font-family:var(--font-num);font-size:clamp(24px,2.4vw,34px);font-weight:700;letter-spacing:-.02em;line-height:1.05}
.cover-metrics .v small{font-size:.5em;font-weight:600;color:var(--muted);margin-left:4px}
.cover-metrics .k{margin-top:6px;font-size:11px;letter-spacing:.12em;color:var(--dim)}
.cover-foot{position:absolute;left:0;right:0;bottom:0;display:flex;justify-content:space-between;
  align-items:flex-end;gap:20px;font-size:11px;letter-spacing:.14em;color:var(--dim)}
.cover .scrollcue{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:11px;letter-spacing:.18em}
.scrollcue .bar{width:1px;height:38px;background:linear-gradient(180deg,var(--cyan),transparent);
  position:relative;overflow:hidden}
.scrollcue .bar::after{content:"";position:absolute;top:-100%;left:0;width:100%;height:100%;
  background:#fff;animation:cue 2.4s var(--ease) infinite}
@keyframes cue{0%{top:-100%}55%{top:100%}100%{top:100%}}

/* --- section number watermark --- */
.watermark{position:absolute;right:-2%;top:-6%;font-family:var(--font-num);font-weight:800;
  font-size:clamp(120px,20vw,300px);line-height:.8;letter-spacing:-.06em;color:rgba(255,255,255,.028);
  pointer-events:none;user-select:none}

/* --- flywheel --- */
.wheel-wrap{display:flex;justify-content:center;align-items:center;position:relative;aspect-ratio:1;
  max-width:460px;margin-inline:auto}
.wheel{position:absolute;inset:6%;border-radius:50%;
  background:conic-gradient(from 0deg,rgba(61,220,255,.0),rgba(61,220,255,.5),rgba(76,125,255,.0) 32%,rgba(155,107,255,.45),transparent 62%,rgba(246,189,85,.5),transparent 92%);
  mask:radial-gradient(farthest-side,transparent calc(100% - 1.5px),#000 calc(100% - 1px));
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 1.5px),#000 calc(100% - 1px));
  animation:spin 22s linear infinite;opacity:.85}
.wheel.r2{inset:18%;animation-duration:15s;animation-direction:reverse;opacity:.4;
  background:conic-gradient(from 90deg,rgba(255,255,255,.4),transparent 30%,rgba(61,220,255,.45),transparent 70%,rgba(155,107,255,.35),transparent)}
.wheel-core{position:relative;width:44%;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;text-align:center;
  background:radial-gradient(circle at 40% 34%,rgba(255,255,255,.1),rgba(8,12,22,.92) 62%);
  border:1px solid var(--line-strong);box-shadow:0 0 60px rgba(61,220,255,.14),inset 0 0 40px rgba(61,220,255,.06)}
.wheel-core b{display:block;font-size:clamp(13px,1.2vw,16px);letter-spacing:.04em;line-height:1.35}
.wheel-core span{font-size:10px;letter-spacing:.2em;color:var(--muted)}
.wheel-node{position:absolute;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;
  width:104px;transform:translate(-50%,-50%)}
.wheel-node .dotmark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  font-size:12px;font-weight:800;font-family:var(--font-num);background:rgba(8,12,22,.9);
  border:1px solid var(--line-strong);box-shadow:0 0 24px rgba(0,0,0,.5)}
.wheel-node b{font-size:12px;letter-spacing:.04em;line-height:1.3;white-space:nowrap}
.wheel-node small{font-size:9.5px;letter-spacing:.1em;color:var(--dim);white-space:nowrap}
@keyframes spin{to{transform:rotate(360deg)}}

/* --- chain / value chain --- */
.chain{display:flex;align-items:stretch;gap:0;flex-wrap:nowrap}
.chain-node{flex:1;position:relative;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-md);
  background:rgba(255,255,255,.03);min-width:0}
.chain-node + .chain-node{margin-left:26px}
.chain-node + .chain-node::before{content:"";position:absolute;left:-18px;top:50%;width:10px;height:1px;background:var(--line-strong)}
.chain-node + .chain-node::after{content:"";position:absolute;left:-9px;top:50%;width:6px;height:6px;
  border-top:1px solid var(--muted);border-right:1px solid var(--muted);transform:translateY(-50%) rotate(45deg)}
.chain-node .idx{font-size:10px;letter-spacing:.2em;color:var(--dim);font-family:var(--font-num)}
.chain-node b{display:block;margin-top:6px;font-size:14px;letter-spacing:.01em}
.chain-node p{margin-top:4px;font-size:11.5px;color:var(--muted);line-height:1.5}
.chain-node.hi{border-color:rgba(61,220,255,.38);background:linear-gradient(180deg,rgba(61,220,255,.1),rgba(61,220,255,.02));
  box-shadow:0 0 34px rgba(61,220,255,.08)}

/* --- steps --- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:step;margin-top:8px}
.step{position:relative;padding:0 14px 0 0}
.step .num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-num);
  font-weight:700;font-size:13px;color:#061018;background:var(--grad-ai);box-shadow:0 0 26px rgba(61,220,255,.4)}
.step:nth-child(2) .num{background:linear-gradient(115deg,#8ec5ff,#4c7dff)}
.step:nth-child(3) .num{background:linear-gradient(115deg,#b7a2ff,#9b6bff)}
.step:nth-child(4) .num{background:linear-gradient(115deg,#ffd9a1,#ff9a4d)}
.step:nth-child(5) .num{background:linear-gradient(115deg,#ffe6a8,#f6bd55)}
.step .line{position:absolute;top:17px;left:44px;right:6px;height:1px;background:var(--line-strong)}
.step .line::after{content:"";position:absolute;right:0;top:-2.5px;width:6px;height:6px;border-radius:50%;background:var(--line-strong)}
.step:last-child .line{display:none}
.step b{display:block;margin-top:16px;font-size:13.5px;line-height:1.45;letter-spacing:.01em}
.step p{margin-top:6px;font-size:11.5px;line-height:1.6;color:var(--muted)}

/* --- browser mock --- */
.browser{border-radius:14px;overflow:hidden;border:1px solid var(--line-strong);
  background:#0a0f1a;box-shadow:0 34px 80px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.02)}
.browser-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;background:rgba(255,255,255,.045);
  border-bottom:1px solid var(--line)}
.browser-bar .dots{display:flex;gap:5px;flex:0 0 auto;position:static;transform:none}
.browser-bar .dots i{width:8px;height:8px;border-radius:50%;background:#3a4356;display:block}
.browser-bar .dots i:nth-child(1){background:#ff5f57}.browser-bar .dots i:nth-child(2){background:#febc2e}.browser-bar .dots i:nth-child(3){background:#28c840}
.browser-bar .url{flex:1;font-size:10.5px;color:var(--muted);background:rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.06);
  border-radius:6px;padding:4px 10px;letter-spacing:.04em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.browser-body{position:relative;background:#070b13;aspect-ratio:16/10;overflow:hidden}
.browser-body img{width:100%;height:100%;object-fit:cover;object-position:top center;
  opacity:.96;transition:transform 8s var(--ease-soft)}
.browser:hover .browser-body img{transform:scale(1.035)}
.browser-body .ph{position:absolute;inset:0;display:grid;place-items:center;color:var(--dim);font-size:12px;letter-spacing:.2em}

/* --- phone --- */
.phone{width:168px;aspect-ratio:9/19;border-radius:26px;border:1px solid var(--line-strong);
  background:#080c15;padding:7px;box-shadow:0 24px 60px rgba(0,0,0,.55)}
.phone .screen{width:100%;height:100%;border-radius:20px;overflow:hidden;background:#0a0f1a}
.phone img{width:100%;height:100%;object-fit:cover}

/* --- chart --- */
.chart{width:100%;height:100%;overflow:visible;position:relative}
.chart > svg{width:100%;height:100%;display:block;overflow:visible}
.chart .axis{stroke:rgba(255,255,255,.09);stroke-width:1}
.chart .gridline{stroke:rgba(255,255,255,.055);stroke-width:1;stroke-dasharray:2 6}
.chart text{fill:var(--dim);font-size:9.5px;font-family:var(--font-num);letter-spacing:.04em}
.chart .series{fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:var(--len,2000);stroke-dashoffset:var(--len,2000);transition:stroke-dashoffset 1.8s var(--ease)}
.slide.is-active .chart .series{stroke-dashoffset:0}
.chart .area{opacity:0;transition:opacity 1.1s var(--ease) .5s}
.slide.is-active .chart .area{opacity:1}
.chart .bar{transform:scaleY(0);transform-origin:center bottom;transition:transform .9s var(--ease)}
.slide.is-active .chart .bar{transform:scaleY(1)}
.chart .donut-seg{stroke-dasharray:0 999;transition:stroke-dasharray 1.2s var(--ease)}
.slide.is-active .chart .donut-seg{stroke-dasharray:var(--seg) 999}
.chart .dot{opacity:0;transition:opacity .5s var(--ease) 1s}
.slide.is-active .chart .dot{opacity:1}
.chart .thr-line{stroke:rgba(246,189,85,.6);stroke-width:1;stroke-dasharray:5 6}
.chart .thr-label{fill:#f6bd55;font-size:10px;letter-spacing:.06em}
.chart .cross-line{stroke:rgba(246,189,85,.32);stroke-width:1;stroke-dasharray:3 6}
.chart .cross-label{fill:#f6bd55;font-size:10px;letter-spacing:.04em}
.chart-legend{display:flex;gap:16px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-top:10px}
.chart-legend i{width:8px;height:8px;border-radius:2px;display:inline-block;margin-right:6px}

/* --- coverage map --- */
.tier-list{display:flex;flex-direction:column;gap:9px}
.tier{display:flex;align-items:center;gap:12px;font-size:12.5px}
.tier .bar{height:9px;border-radius:99px;background:linear-gradient(90deg,var(--cyan),var(--blue));
  width:calc(var(--w) * 1%);box-shadow:0 0 18px rgba(61,220,255,.25);transform-origin:left;
  animation:growX 1.2s var(--ease) both}
.tier .lbl{flex:0 0 92px;color:var(--muted);font-size:11.5px}
.tier .val{flex:0 0 auto;min-width:40px;margin-left:12px;text-align:left;font-family:var(--font-num);color:var(--ink-2);font-size:11.5px}
@keyframes growX{from{transform:scaleX(0)}to{transform:scaleX(1)}}

/* --- pricing / scenario cards --- */
.scenario{border:1px solid var(--line);border-radius:var(--r-md);padding:18px;background:rgba(255,255,255,.028);position:relative}
.scenario.best{border-color:rgba(246,189,85,.45);background:linear-gradient(180deg,rgba(246,189,85,.08),rgba(246,189,85,.015))}
.scenario .tagline{display:flex;justify-content:space-between;align-items:center}
.scenario .row{display:flex;justify-content:space-between;align-items:baseline;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.scenario .row:last-child{border:0}
.scenario .row span{font-size:11.5px;color:var(--muted)}
.scenario .row b{font-family:var(--font-num);font-size:14px;color:var(--ink)}

/* --- allocation --- */
.alloc-row{display:grid;grid-template-columns:112px 1fr 66px;align-items:center;gap:12px;padding:7px 0}
.alloc-row .nm{font-size:12px;color:var(--ink-2)}
.alloc-row .track{height:8px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden}
.alloc-row .track i{display:block;height:100%;width:0;border-radius:99px;background:var(--grad-ai);
  transition:width 1.2s var(--ease)}
.slide.is-active .alloc-row .track i{width:var(--w)}
.alloc-row .pc{text-align:right;font-family:var(--font-num);font-size:12px;color:var(--muted)}

/* --- team --- */
.person{display:flex;gap:14px;align-items:flex-start}
.avatar{width:52px;height:52px;border-radius:14px;flex:0 0 auto;display:grid;place-items:center;
  font-size:17px;font-weight:700;letter-spacing:.02em;color:#071019;
  background:linear-gradient(140deg,#b8f1ff,#3ddcff 55%,#4c7dff);box-shadow:0 10px 30px rgba(61,220,255,.2)}
.avatar.gold{background:linear-gradient(140deg,#ffe8b8,#f6bd55 55%,#ff9a4d);box-shadow:0 10px 30px rgba(246,189,85,.18)}
.avatar.violet{background:linear-gradient(140deg,#e5d6ff,#9b6bff 55%,#6b46d8);box-shadow:0 10px 30px rgba(155,107,255,.2)}

/* --- risk --- */
.risk{display:grid;grid-template-columns:38px 1fr;gap:14px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.risk:last-child{border-bottom:0}
.risk .n{font-family:var(--font-num);font-size:11px;color:var(--red);letter-spacing:.1em;padding-top:2px}
.risk b{font-size:13.5px;display:block;margin-bottom:3px}
.risk p{font-size:11.5px;color:var(--muted);line-height:1.6}

/* --- footer cta --- */
.cta-line{display:flex;align-items:center;gap:14px;font-size:12px;letter-spacing:.16em;color:var(--muted)}

/* 09 per-slide tuning ------------------------------------------------------ */
.s-cover .cover-foot{position:static;margin-top:clamp(40px,7vh,80px)}
.s-market .legend{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px}
.s-model .wheel-wrap{max-width:420px}

/* denser slides that carry a lot of content */
.slide.dense{padding-top:clamp(50px,6.4vh,78px);padding-bottom:clamp(46px,5.6vh,64px)}
.slide.dense .slide-head{margin-bottom:clamp(16px,2.2vh,26px)}
.card.compact{padding:14px 16px}
.stat.compact{padding:8px 0}
.stat.compact .v{font-size:clamp(25px,2.5vw,37px)}
.stat.compact .k{margin-top:6px;font-size:11px}
.stat.compact .src{margin-top:2px;font-size:9.5px}
.scenario.compact{padding:14px 16px}
.scenario.compact .row{padding:6px 0}
.mini-stat{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.mini-stat b{font-family:var(--font-num);font-size:20px;font-weight:700;letter-spacing:-.02em;color:#fff}
.mini-stat span{font-size:11px;color:var(--muted)}

/* 10 responsive ------------------------------------------------------------ */
@media (max-width:1080px){
  .split{grid-template-columns:1fr;gap:26px}
  .g4,.g5{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr;gap:22px 0}
  .step .line{display:none}
  .chain{flex-wrap:wrap;gap:14px}
  .chain-node + .chain-node{margin-left:0}
  .chain-node + .chain-node::before,.chain-node + .chain-node::after{display:none}
  .cover-metrics{grid-template-columns:repeat(3,1fr)}
  .watermark{display:none}
}
@media (max-width:720px){
  :root{--pad-x:20px}
  .slide{padding:82px 20px 76px;align-items:flex-start}
  .slide-inner{padding-top:8px}
  h1.big{font-size:clamp(38px,11vw,58px)}
  h2.sec{font-size:clamp(26px,7.4vw,34px);max-width:none}
  .g2,.g3,.g4,.g5{grid-template-columns:1fr}
  .cover-metrics{grid-template-columns:1fr 1fr;gap:16px}
  .cover-metrics .item:nth-child(3){display:none}
  .steps{grid-template-columns:1fr}
  .dots{right:8px;gap:8px}
  .dots button span{display:none}
  .brandmark,.pager{font-size:9px}
  .pager{left:20px}
  .browser-body{aspect-ratio:4/3}
  .tbl{font-size:11.5px}
  .tbl th,.tbl td{padding:8px 6px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important}
  .rv{opacity:1;transform:none}
}

/* laptop-height compression (1366×768 / 1440×800) */
@media (max-height:820px) and (min-width:721px){
  .slide{padding-top:44px;padding-bottom:38px}
  .slide.dense{padding-top:38px;padding-bottom:32px}
  .slide-head{margin-bottom:16px}
  .slide.dense .slide-head{margin-bottom:12px}
  .kicker{margin-bottom:12px}
  h2.sec{font-size:clamp(26px,3vw,40px)}
  h2.big,.cover h1{font-size:clamp(44px,6.2vw,76px)}
  .lede{margin-top:10px;font-size:13.5px;line-height:1.6}
  .cover-metrics{margin-top:26px}
  .stat{padding:9px 0}
  .stat .v{font-size:clamp(28px,2.8vw,42px)}
  .card{padding:14px 16px}
  .chart[data-chart="market"]{height:228px !important}
  .chart[data-chart="finance"]{height:188px !important}
  .chart[data-chart="allocation"]{width:205px !important}
  .browser-body{aspect-ratio:16/9}
  .cover-foot{margin-top:26px}
}
@media print{
  body{overflow:visible;background:#05070d}
  #deck{height:auto;overflow:visible}
  .slide{page-break-after:always;min-height:100vh}
  .chrome,.hint,.fsbtn{display:none}
}

/* 11 static / screenshot mode (?static=1) --------------------------------- */
html.static .rv{opacity:1 !important;transform:none !important}
html.static *,html.static *::before,html.static *::after{transition:none !important;animation:none !important}
html.static .chart .series{stroke-dashoffset:0 !important}
html.static .chart .area{opacity:1 !important}
html.static .chart .bar{transform:none !important}
html.static .chart .donut-seg{stroke-dasharray:var(--seg) !important}
html.static .chart .dot{opacity:1 !important}
html.static .alloc-row .track i{width:var(--w) !important}
html.static .tier .bar{width:calc(var(--w) * 1%) !important}
html.static .hint{display:none}
html.static .fsbtn{display:none}
html.static .orb{transform:none !important}


/* ==========================================================================
   MOTION V2 — 更丰富的入场 / 纵深 / 交互
   ========================================================================== */

/* 页面切换：离场页轻微下沉+变暗，形成交叉溶解 */
.slide-inner{transition:opacity .8s var(--ease),transform 1s var(--ease)}
.slide:not(.is-active) .slide-inner{opacity:.3;transform:translateY(28px)}

/* 封面大标题：横向擦除（保留渐变文字） */
h1.big{clip-path:inset(-14% 100% -14% 0);transition:clip-path 1.25s var(--ease) .05s}
.slide.is-active h1.big{clip-path:inset(-14% 0 -14% 0)}

/* 标题逐字入场 */
.ch,.ch-word{display:inline-block;opacity:0;transform:translate3d(0,.5em,0) rotate(2deg);filter:blur(7px);
  transition:opacity .65s var(--ease),transform .78s var(--ease),filter .65s var(--ease);
  transition-delay:calc(.1s + var(--i,0) * 19ms);will-change:opacity,transform}
.ch-word{transform:translate3d(0,.36em,0);filter:blur(4px)}
.slide.is-active .ch,.slide.is-active .ch-word{opacity:1;transform:none;filter:none}

/* 表格逐行 */
.tbl tbody tr{opacity:0;transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease),background .3s var(--ease);
  transition-delay:calc(.26s + var(--ri,0) * 45ms)}
.slide.is-active .tbl tbody tr{opacity:1;transform:none}

/* 价值链节点 */
.chain-node{opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .8s var(--ease),border-color .5s var(--ease)}
.slide.is-active .chain-node{opacity:1;transform:none}
.chain-node:nth-child(1){transition-delay:.14s}
.chain-node:nth-child(2){transition-delay:.24s}
.chain-node:nth-child(3){transition-delay:.34s}
.chain-node:nth-child(4){transition-delay:.44s}
.chain-node:nth-child(5){transition-delay:.54s}
.chain-node:nth-child(6){transition-delay:.64s}

/* 五步流程 */
.step .num{transform:scale(.45);opacity:0;
  transition:transform .7s var(--ease),opacity .45s var(--ease)}
.slide.is-active .step .num{transform:none;opacity:1}
.step .line{transform:scaleX(0);transform-origin:left center;transition:transform .9s var(--ease)}
.slide.is-active .step .line{transform:none}
.step:nth-child(1) .num{transition-delay:.18s}
.step:nth-child(2) .num{transition-delay:.3s}
.step:nth-child(3) .num{transition-delay:.42s}
.step:nth-child(4) .num{transition-delay:.54s}
.step:nth-child(5) .num{transition-delay:.66s}
.step:nth-child(1) .line{transition-delay:.3s}
.step:nth-child(2) .line{transition-delay:.42s}
.step:nth-child(3) .line{transition-delay:.54s}
.step:nth-child(4) .line{transition-delay:.66s}

/* 导航点呼吸 */
.dots button.on::before{animation:dotPulse 2.6s ease-in-out infinite}
@keyframes dotPulse{0%,100%{box-shadow:0 0 10px rgba(61,220,255,.6)}50%{box-shadow:0 0 24px rgba(61,220,255,1)}}

/* 顶部进度流光 */
.progress i{background-size:220% 100%;animation:barFlow 3.6s linear infinite}
@keyframes barFlow{to{background-position:220% 0}}

/* 卡片：鼠标聚光 + 轻微 3D 倾斜 */
.card{--cx:50%;--cy:0%;--rx:0deg;--ry:0deg}
@media (hover:hover){
  .card:hover{transform:perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px)}
  .card.flat:hover{transform:none}
}
.card::after{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:0;
  background:radial-gradient(340px circle at var(--cx) var(--cy),rgba(61,220,255,.14),transparent 62%);
  opacity:0;transition:opacity .45s var(--ease)}
.card:hover::after{opacity:1}
.card > *{position:relative;z-index:1}

/* 图表细节 */
.chart .gridline{opacity:0;transition:opacity .7s var(--ease)}
.slide.is-active .chart .gridline{opacity:1}
.chart .dot{transform:scale(0);transform-box:fill-box;transform-origin:center;
  transition:transform .5s var(--ease) 1s,opacity .5s var(--ease) 1s}
.slide.is-active .chart .dot{transform:scale(1);opacity:1}
.chart .pulse{fill:none;stroke:#f6bd55;stroke-width:1.4;opacity:0;transform-box:fill-box;transform-origin:center}
.slide.is-active .chart .pulse{animation:pulseRing 2.4s ease-out infinite}
@keyframes pulseRing{0%{transform:scale(.4);opacity:.85}70%{transform:scale(2.4);opacity:0}100%{opacity:0}}

/* 水印随滚动视差 */
.watermark{transform:translate3d(0,var(--wm,0px),0);will-change:transform}

/* ?static=1 与无障碍：直接呈现终态 */
html.static .slide-inner{opacity:1 !important;transform:none !important}
html.static h1.big{clip-path:none !important}
html.static .ch,html.static .ch-word{opacity:1 !important;transform:none !important;filter:none !important}
html.static .tbl tbody tr{opacity:1 !important;transform:none !important}
html.static .chain-node{opacity:1 !important;transform:none !important}
html.static .step .num{opacity:1 !important;transform:none !important}
html.static .step .line{transform:none !important}
html.static .chart .gridline{opacity:1 !important}
html.static .chart .dot{transform:none !important;opacity:1 !important}
html.static .chart .pulse,html.static .dots button.on::before,html.static .progress i{animation:none !important}
html.static .card:hover{transform:none !important}

@media (prefers-reduced-motion:reduce){
  .slide-inner{opacity:1 !important;transform:none !important}
  h1.big{clip-path:none !important}
  .ch,.ch-word{opacity:1 !important;transform:none !important;filter:none !important}
  .tbl tbody tr{opacity:1 !important;transform:none !important}
  .chain-node{opacity:1 !important;transform:none !important}
  .step .num{opacity:1 !important;transform:none !important}
  .step .line{transform:none !important}
  .chart .gridline{opacity:1 !important}
  .chart .dot{transform:none !important;opacity:1 !important}
  .chart .pulse{display:none}
}
@media print{
  .slide-inner{opacity:1 !important;transform:none !important}
  h1.big{clip-path:none !important}
  .ch,.ch-word,.tbl tbody tr,.chain-node{opacity:1 !important;transform:none !important;filter:none !important}
  .step .num{opacity:1 !important;transform:none !important}
  .chart .pulse{display:none}
}


/* ==========================================================================
   HERO OVERLAYS — 全页共用同一张背景；封面 / 尾页额外压暗
   ========================================================================== */
.s-cover,.s-final{overflow:hidden}
.s-cover::before,.s-final::before{content:'';position:absolute;inset:0;z-index:-1;pointer-events:none}
.s-cover::before{background:
  linear-gradient(90deg,rgba(4,6,12,.96) 0%,rgba(4,6,12,.9) 28%,rgba(4,6,12,.55) 50%,rgba(4,6,12,.12) 68%,rgba(4,6,12,.52) 100%),
  linear-gradient(0deg,rgba(4,6,12,.94) 0%,rgba(4,6,12,.58) 20%,rgba(4,6,12,.05) 50%,rgba(4,6,12,0) 70%),
  radial-gradient(100% 86% at 20% 58%,rgba(4,6,12,.55),transparent 64%)}
.s-final::before{background:radial-gradient(74% 78% at 50% 48%,rgba(4,6,12,.9) 0%,rgba(4,6,12,.5) 50%,rgba(4,6,12,.9) 100%)}
@media (max-width:720px){
  .s-cover::before{background:linear-gradient(180deg,rgba(4,6,12,.95) 0%,rgba(4,6,12,.62) 42%,rgba(4,6,12,.96) 100%)}
}


/* ==========================================================================
   GLOBAL BACKDROP — 同一张背景图铺到每一页（低透明度 + 中心压暗）
   ========================================================================== */
.bg-art{position:absolute;inset:-4%;pointer-events:none;
  background:url(../img/bg-cover.jpg) center 55% / cover no-repeat;
  opacity:.56;filter:brightness(.86) saturate(.98);
  animation:bgDrift 64s ease-in-out infinite alternate;will-change:transform}
.bg-art::after{content:'';position:absolute;inset:0;
  background:
    radial-gradient(78% 66% at 50% 44%,rgba(4,6,12,.68) 0%,rgba(4,6,12,.44) 46%,rgba(4,6,12,.06) 82%),
    linear-gradient(180deg,rgba(4,6,12,.42) 0%,rgba(4,6,12,.08) 36%,rgba(4,6,12,.62) 100%)}
@keyframes bgDrift{0%{transform:scale(1.02) translate3d(0,0,0)}100%{transform:scale(1.06) translate3d(0,-1.4%,0)}}
html.static .bg-art{animation:none !important}
@media (max-width:720px){.bg-art{opacity:.3}}